JP2024108151A - Cushion and cushion arrangement structure - Google Patents

Abstract

To provide a cushion capable of supporting and holding a user's sitting posture or posture of a back part and a head part of the body and being usable in a wide range of applications, and cushion arrangement structure.SOLUTION: A cushion A, the example of a cushion to which the present invention is applied, includes a body part 1, a bulge part 2 and a bulge part 3. The body part 1 is a part to be a body of the cushion 1 and is a belt-like member for connecting the bulge part 2 and the bulge part 3. Further, the bulge part 2 and the bulge part 3 constitute right and left ends of the cushion 1, and have the thickness larger than that of the body part 1. The bulge part 2 and the bulge part 3 are configured to be bendable toward the body part 1 on both the front and back sides of the body part 1. Furthermore, the bulge part 2 or the bulge part 3 is rotated toward the other bulge part while wrapping the body part 1, to make the cushion further thicker.SELECTED DRAWING: Figure 1

Description

The present invention relates to a cushion and a cushion arrangement structure. More specifically, it relates to a cushion and a cushion arrangement structure that can support and maintain the user's sitting posture or the posture of the back and head of the body, is easy to use, and can be used for a wide range of purposes, such as furniture chairs, wheelchairs, hairdressing chairs, hair washing chairs, car seats, and beds with reclining functions.

Traditionally, in furniture chairs, wheelchairs, etc., cushions are used together with the chair to keep the seated person in a stable position.

For example, when sitting in a chair for long periods of time while doing desk work or when sitting in the driver's seat of a car while driving for long periods of time, cushions are placed on the seat and back of the chair to reduce strain on the body.

In addition, for elderly people and wheelchair users, the ability to support the upper body is reduced, making the sitting posture unstable when sitting in a chair or wheelchair and making it easy for the body to fall forward or sideways, so cushions are placed on the seat and back of the chair to stabilize the sitting posture.

In light of this, a wheelchair seating cushion has been proposed that attempts to reduce pain in the lower back of wheelchair occupants, prevent them from falling to the side, and provide excellent seating stability (see, for example, Patent Document 1).

The wheelchair seating cushion 500 described in Patent Document 1 is used by attaching it to the backrest and side panels of a wheelchair or a wheelchair with a chair cover attached.

The wheelchair seating support cushion 500 described in Patent Document 1, as shown in FIG. 36, is composed of a lumbar support 501 that is removably attached to the backrest of the wheelchair and abuts along the lumbar region of the seated person to support the lumbar region of the seated person, and a pair of flank support members 502 that are removably attached to the side panels of the wheelchair and abut along the flank region of the seated person to support the flank region of the seated person.

The wheelchair seating cushion 500 described in Patent Document 1 has a lumbar support 501 stored in a cover 503, a hook-and-loop fastener 503A on the cover 503 connected to a hook-and-loop fastener on the backrest of the wheelchair, and the lumbar support 501 attached to the backrest. Also, the flank support 502 is stored in a cover 504, a hook-and-loop fastener 504A on the cover 504 connected to a hook-and-loop fastener on the side panel of the wheelchair, and the flank support 502 is attached to the side panel.

When the wheelchair seating support cushion 500 described in Patent Document 1 is attached to a wheelchair, the lumbar support 501 comes into contact with the seated person's lower back and supports the lower back of the seated person, while the flank support 502 comes into contact with the seated person's sides and supports the seated person's sides, stabilizing the seated position of the seated person.

JP 2003-153764 A

However, the wheelchair seating cushion described in Patent Document 1 requires a hook-and-loop fastener to be provided on the wheelchair or chair cover in order to attach the cushion, and the objects to which it can be attached are very limited. In addition, its use is limited to wheelchairs, and the structure does not take into consideration application to other types of chairs.

For example, when increasing the number of types of chairs to which the wheelchair seating cushion described in Patent Document 1 can be attached, only chairs whose shapes match the shape of the chair cover can be used, or a chair cover needs to be made each time to fit the shape of the chair, making it practically difficult to expand the number of types of chairs to which the cushion can be attached.

Furthermore, the wheelchair seating cushion described in Patent Document 1 is limited to a U-shape in plan view, meaning that the overall shape of the cushion cannot be changed, and the user's posture and body parts that can be supported by the cushion are also limited.

The present invention was devised in light of the above points, and aims to provide a cushion and cushion arrangement structure that can support and maintain the user's sitting posture or the posture of the back and head, is easy to use, and can be used for a wide range of purposes, such as furniture chairs, wheelchairs, hairdressing chairs, hair-washing chairs, car seats, and beds with reclining functions.

To achieve the above object, the cushion of the present invention comprises a main body formed in a band shape, a first bulge provided on one end edge of the longitudinal side of the main body, having a thickness greater than the main body, a length along the longitudinal direction of the main body being less than half the longitudinal length of the main body, and capable of being bent toward the main body on either the front or back surface side of the main body, and a second bulge provided on the other end edge of the longitudinal side of the main body, having a thickness greater than the main body, a length along the longitudinal direction of the main body being less than half the longitudinal length of the main body, and capable of being bent toward the main body on either the front or back surface side of the main body.

Here, the belt-shaped main body portion has a certain width and length and can be placed against a part of the user's body to support the body. That is, for example, the main body portion can be placed on the backrest or seat of a chair, and the main body portion can support the user's lower back and buttocks when in a seated position.

The first bulge is provided on one edge of the main body in the longitudinal direction, has a thickness greater than that of the main body, and can be bent toward the main body on either the front or back side of the main body. This allows the first bulge to support the sides of the armpits and waist of a user in a seated position in a chair or wheelchair with armrests. That is, for example, by placing the main body on the back or seat of a chair and bending the first bulge toward the main body along the armrest of the chair, the first bulge can be positioned between the sides of the armpits and waist of the user and the armrest. Furthermore, the first bulge is formed to be thicker than the main body, so that it can fill the space between the user's body and the armrest and adequately support the part of the body that it comes into contact with.

The second bulge is provided on the other edge of the main body in the longitudinal direction, has a thickness greater than that of the main body, and can be bent toward the main body on either the front or back side of the main body, so that in a chair or wheelchair with armrests, the second bulge can support the sides of the armpits and waist of the user in a seated position. That is, for example, by placing the main body on the back or seat of the chair and bending the second bulge toward the main body along the armrest of the chair, the second bulge can be positioned between the sides of the armpits and waist of the user and the armrest. Also, because the second bulge is formed to be thicker than the main body, it can fill the space between the user's body and the armrest and adequately support the part of the body that it comes into contact with.

In addition, since the first and second bulges can be bent toward the main body on either the front or back side of the main body, the overall shape of the cushion can be freely changed, and the body can be supported according to the user's posture and the part of the body that is to be supported. For example, the first and second bulges can be bent approximately 90 degrees toward the main body to form a U-shape. In addition, the first and second bulges can be completely folded toward the main body on the same front or back side, and used as a thick cushion with the thickness of the main body and the thickness of the two bulges. Furthermore, by folding the first bulge toward the back side of the main body and bending the second bulge approximately 90 degrees toward the main body, the cushion can be placed on a chair that has an armrest on only one side.

In addition, the main body is formed in a belt shape, and the first bulge is provided on one edge of the longitudinal side of the main body, and the second bulge is provided on the other edge of the longitudinal side of the main body, resulting in a shape in which the first bulge and the second bulge are connected to both ends of the main body, which has a certain length. With this, for example, the main body can be used by hanging it on the upper part of the backrest of a chair or the upper part of the backrest of a bed with a reclining function. In this case, one of the first bulge or the second bulge is placed at a desired height position on the backrest, and the other is hung on the opposite side of the backrest from the user side, so that the bulge placed on the backrest side can support the user's body. For example, the user's waist, back, cervical vertebrae, head, etc. can be supported by one of the first bulge or the second bulge.

In addition, the main body is formed in a band shape, the first bulge is provided on one edge of the longitudinal side of the main body and has a length along the longitudinal direction of the main body that is less than half the longitudinal length of the main body, and the second bulge is provided on the other edge of the longitudinal side of the main body and has a length along the longitudinal direction of the main body that is less than half the longitudinal length of the main body. When the first bulge and the second bulge are folded toward the main body on the same side of the front or back surface of the main body, the two bulges can be folded toward the main body without interfering with each other. This allows the two bulges to not overlap when a thicker cushion is made, having the thickness of the main body and the thickness of the two bulges, and improves the feel of the cushion when applied to the body.

In addition, the first and second bulges are configured so that the main body can be wrapped around one of the bulges as a core toward the other bulge, and if the shape of the main body wrapped around the core can be maintained, the cushion can be shaped to have one bulge and a larger part that is enlarged by wrapping the main body around the bulge. That is, the cushion has two bulges with significantly different sizes. With this, for example, the backrest of a chair or bed with a reclining function can be tilted, and the bulge around which the main body is wrapped can be placed on the upper side and the bulge around which the main body is not wrapped can be placed on the lower side, so that the cushion can be positioned along the cervical vertebrae and head of the user. That is, for example, by using the cushion on a person who is receiving cosmetic care such as meal assistance, dental treatment, oral care, tooth brushing, or shaving on the bed, the position and angle of the user's jaw can be adjusted, and the service can be provided in a comfortable position. Additionally, for the service provider, the user's posture is maintained and the head position is stabilized, allowing the service to be provided safely.

In addition, if the longitudinal length of the main body is within a range of two to three times the longitudinal length of the main body at the first bulge and the second bulge, the length of the main body can be set to an appropriate length that is easy to place on the back or seat of a chair when placing the cushion on the back or seat of the chair.

Here, if the longitudinal length of the main body is less than twice the longitudinal length of the first and second bulges, when the first and second bulges are folded toward the main body on the same side of the front or back of the main body, the two bulges will interfere with each other, resulting in a poor usability in this shape. Also, if the longitudinal length of the main body is more than three times the longitudinal length of the first and second bulges, the main body will be longer than necessary, making it difficult to place on the back or seat of a chair or when hanging the main body on the upper part of the back of a chair, etc.

In addition, when the first and second bulges are formed in an elliptical shape in a cross section along the longitudinal direction of the main body, and the thickness of the first and second bulges is within a range of 5 to 40 times the thickness of the main body, the feel of the first and second bulges when placed against the user's body can be made even better. In other words, the thickness of the two bulges is sufficiently large, and the area of the bulges that come into contact with the body can be increased while still having a rounded, soft shape.

In addition, if the connection position between the main body and the first bulge and the connection position between the main body and the second bulge are approximately at the center of the thickness of the first bulge and the second bulge in the thickness direction of the main body, when folding the first bulge and the second bulge onto the front or back side of the main body, each bulge can be easily folded evenly on either side. This makes it easier to position the cushion in the shape in which the first bulge and the second bulge are folded.

In addition, if the main body is formed into an upper main body and a lower main body that can be separated along the thickness direction, and the contact surfaces of the upper main body and the lower main body are provided with hook-and-loop fasteners that can be engaged with each other, and the longitudinal length of the main body can be adjusted by changing the joining position of the hook-and-loop fasteners, the longitudinal length of the main body can be freely adjusted simply by changing the engagement position of the hook-and-loop fasteners. This allows the size of the cushion to be changed with even greater freedom to suit the size and shape of the chair and the part of the user's body that it is desired to apply to.

In order to achieve the above object, the cushion of the present invention comprises a first main body portion formed in a band shape, a first bulge portion provided on one end edge of the longitudinal side of the first main body portion, having a thickness greater than that of the first main body portion, a length along the longitudinal direction of the first main body portion formed to be half or less than the longitudinal length of the first main body portion, and capable of being folded toward the first main body portion on either the front or back surface side of the first main body portion, and a second bulge portion provided on the other end edge of the longitudinal side of the first main body portion, having a thickness greater than that of the first main body portion, a length along the longitudinal direction of the first main body portion formed to be half or less than the longitudinal length of the first main body portion, and capable of being folded toward the first main body portion on either the front or back surface side of the first main body portion, and a band-shaped bulge portion attached to one end edge of the short side side of the first main body portion. The second body part is attached to the edge of the upper and lower connection part opposite to the edge of the first body part in the short direction, and is formed in a band shape; a third bulge part is provided on one edge of the longitudinal side of the second body part, has a thickness greater than that of the second body part, and has a length along the longitudinal direction of the second body part that is less than half the length of the second body part in the longitudinal direction, and can be bent toward the second body part on either the front or back surface side of the second body part; and a fourth bulge part is provided on the other edge of the longitudinal side of the second body part, has a thickness greater than that of the second body part, and has a length along the longitudinal direction of the second body part that is less than half the length of the second body part in the longitudinal direction, and can be bent toward the second body part on either the front or back surface side of the second body part.

Here, the cushion can be made to have a certain length even in the direction along the short side of the first main body by using a first main body part formed in a band shape, an upper and lower connection part formed in a band shape and attached to one end edge of the first main body part on the short side of the first main body part, and a second main body part formed in a band shape and attached to the end edge of the upper and lower connection part opposite to the one end edge of the first main body part on the short side of the first main body part. Thus, for example, when placing the cushion on a chair having a backrest and a seat, by placing the first main body part and the upper and lower connection part on the backrest side and the second main body part on the seat side, it is possible to support a wide range of body parts from the user's buttocks, waist, and back.

In addition, the third bulge is bent along the vertical direction of one side of the armrest and toward the other side of the second main body, and the fourth bulge is bent along the vertical direction of the other side of the armrest and toward the other side of the second main body. The first bulge is bent along the extension direction of one side of the armrest and toward the other side of the first main body, and the second bulge is bent along the extension direction of the other side of the armrest and toward the other side of the first main body. This allows the left and right sides of the user's waist, the left and right sides of the back, and the outsides of both arms and both shoulders to be stably supported by each bulge. In other words, the third bulge and the fourth bulge located on the seat side can support both the left and right sides of the user's waist. In addition, the first and second bulges located on the backrest side can support the left and right sides of the user's back, as well as the outside of both arms and shoulders. In this way, the four bulges can stably support the user, wrapping around both the left and right sides of the body.

In addition, if the cushion has a first connection portion that connects the main body portion and the first swelling portion and separates the main body portion from the first swelling portion, and a second connection portion that connects the main body portion and the second swelling portion and separates the main body portion from the second swelling portion, and the main body portion, the first swelling portion, and the second swelling portion are each capable of adjusting the degree of swelling by injecting water or air into the inside, the first swelling portion or the second swelling portion can be easily bent relative to the main body portion to deform the overall shape, and the shape and degree of swelling can be easily adjusted by simply changing the amount of water or air injected into each of the main body portion, the first swelling portion, and the second swelling portion. In addition, when not in use, the entire cushion can be made compact by draining the water or air, improving portability. In addition, for example, it is possible to use it as a water pillow by injecting cold water, or to use warm water to warm the part of the body that is in contact with the cushion, thereby relieving pain such as lower back pain. In addition, the degree of swelling of the first swelling portion and the second swelling portion can be easily made different. Furthermore, by making the main body portion also swell, the cushioning properties of the main body portion can be improved.

In addition, if the main body is formed in a direction parallel to the short side of the main body and shorter than the short side distance of the main body, and has multiple main body vertical partitions that divide the main body into multiple bulging sections along the longitudinal direction of the main body, when water or air is injected into the main body to cause it to swell, it can be divided into multiple bulging sections along the longitudinal direction of the main body, rather than being one large bulge. This makes it easier to fit the main body along the user's waist or neck, and increases the number of places where the main body comes into contact with the body, making it possible to support parts of the body more stably. In addition, because the main body vertical partitions are formed shorter than the short side distance of the main body, the inside of the main body is not completely partitioned, and water or air can be distributed throughout the inside of the main body by simply providing one inlet for the main body.

In addition, if the first bulge is formed in a direction parallel to the short side direction of the main body and shorter than the distance of the first bulge in the short side direction of the main body, and has a first partition that divides the first bulge into multiple bulge sections along the longitudinal direction of the main body, when water or air is injected to cause the first bulge to swell, the first bulge can be divided into multiple bulge sections along the longitudinal direction of the main body, rather than being one large bulge. This allows the first bulge to be shaped to swell widely along the longitudinal direction of the main body, making it easier to fit the first bulge along the waist or neck of the user, and increasing the number of places where the first bulge comes into contact with the body, making it possible to support parts of the body more stably. In addition, because the first partition is formed shorter than the short-side distance of the main body in the first bulge, the inside of the first bulge is not completely partitioned, and water or air can be distributed throughout the inside of the first bulge by simply providing a single inlet for the first bulge.

In addition, if the second bulge is formed in a direction parallel to the short side of the main body and shorter than the distance of the second bulge in the short side of the main body, and has a second partition that divides the second bulge into multiple bulge sections along the longitudinal direction of the main body, when water or air is injected to cause the second bulge to swell, the second bulge can be divided into multiple bulge sections along the longitudinal direction of the main body, rather than being one large bulge. This allows the second bulge to be shaped to swell widely along the longitudinal direction of the main body, making it easier to fit the second bulge along the user's waist or neck, and increasing the number of places where the second bulge comes into contact with the body, making it possible to support parts of the body more stably. In addition, because the second partition is formed shorter than the short-side distance of the main body in the second bulge, the inside of the second bulge is not completely partitioned, and water or air can be distributed throughout the inside of the second bulge by simply providing a single inlet for the second bulge.

In addition, if the main body is formed in a direction parallel to the longitudinal direction of the main body and shorter than the longitudinal distance of the main body, and has multiple main body horizontal partitions that divide the main body into multiple bulging sections along the short side of the main body, when water or air is injected into the main body to cause it to swell, it can be divided into multiple bulging sections along the short side of the main body, rather than being one large bulge. This makes it easier to fit the main body along the user's waist or neck, and increases the number of places where the main body comes into contact with the body, making it possible to support parts of the body more stably. In addition, because the main body horizontal partitions are formed shorter than the longitudinal distance of the main body, the inside of the main body is not completely partitioned, and water or air can be distributed throughout the inside of the main body by simply providing one inlet for the main body.

In addition, when there is a first connection portion that connects the main body portion and the first bulge portion and separates the main body portion from the first bulge portion, and a second connection portion that connects the main body portion and the second bulge portion and separates the main body portion from the second bulge portion, it becomes easier to bend the first bulge portion or the second bulge portion relative to the main body portion to deform the overall shape.

In addition, when the main body is composed of a main body cover body, which is a cover body, and at least one of the first and second inflating parts is composed of an inflating part cover body, which is a cover body, and at least one of a cushion inner material consisting of a plurality of chip-shaped members arranged inside the inflating part cover body and an expandable cushion material filled with water or air, it is possible to form a cushion with a simple structure and sufficient expansion by forming the outer parts of the main body and at least one of the first and second inflating parts with a cover body, and placing at least one of the cushion inner material and the expandable cushion material inside the part of the cover body that is to be inflated. Also, in at least one of the first and second inflating parts, it is possible to easily adjust the degree of expansion by simply changing the amount of chip-shaped members used or the amount of water (air) injected.

In addition, when at least one of the first and second bulging portions has a cushion inner material disposed inside the bulging portion cover, and the cushion inner material is formed by combining multiple inner materials with different amounts of chip-shaped components, it is possible to easily adjust the degree of bulging of at least one of the first and second bulging portions by simply changing the combination of inner materials of different sizes and disposing them inside the bulging portion cover. That is, for example, by preparing inner materials of large, medium, and small sizes by changing the amount of chip-shaped components, and simply inserting and removing each inner material into and from the bulging portion cover, it is possible to easily adjust the degree of bulging to a desired level.

In addition, when the cushion inner material and the expandable/contractable cushion material are disposed inside the expansion portion cover body of at least one of the first and second expansion portions, it becomes possible to easily adjust the degree of expansion of at least one of the first and second expansion portions using both the cushion inner material and the expandable/contractable cushion material. That is, for example, by providing a rough degree of expansion with the cushion inner material and finely adjusting the degree of expansion of the expandable/contractable cushion material, it is possible to easily finely adjust the degree of expansion of at least one of the first and second expansion portions.

In addition, when the expandable/contractable cushion material is disposed inside the bulge cover body of each of the first bulge portion and the second bulge portion, both the first bulge portion and the second bulge portion can be inflated via the expandable/contractable cushion material.

Furthermore, when the main body portion is composed of a main body cover body and a main body expandable cushion material that is disposed inside the main body cover body, has the same size as the main body cover body, and is filled with water or air, it is possible to improve the cushioning properties of the main body portion and to adjust the degree of expansion of the main body portion with a high degree of freedom. In other words, the main body portion is formed to be longer in the longitudinal direction than the first and second expansion portions and occupies the majority of the entire cushion, so that the cushion as a whole has good cushioning properties, and the degree of expansion of the main body portion can be adjusted with a high degree of freedom, making it even easier to match the shape of the cushion to the body shape and preferences of the user.

In addition, when the main body is composed of at least one of a cushion inner material made of a plurality of chip-shaped members and a plurality of main body partition expandable/contractable cushion materials filled with water or air, which are arranged inside the main body cover body in a direction parallel to the short side direction of the main body and divide the main body into a plurality of inflated sections along the longitudinal direction of the main body, at least one of the plurality of cushion inner materials and the plurality of main body partition expandable/contractable cushion materials can be inserted and removed inside the main body cover body to give the main body a shape in which it is divided into a plurality of inflated sections along the longitudinal direction of the main body, rather than a single large inflated shape. This makes it easier to fit the main body to the user's waist and neck, and increases the number of places where the main body comes into contact with the body, making it possible to support parts of the body more stably. The shape and degree of inflatability of the main body partition expandable/contractable cushion material can be easily adjusted simply by changing the amount of water or air injected.

In addition, when the cushion inner material is arranged inside the bulge cover body of each of the first bulge portion and the second bulge portion, both the first bulge portion and the second bulge portion can be inflated via the cushion inner material.

In addition, when the main body is made of a body cover and a plate-shaped urethane material that is disposed inside the body cover and has the same size as the body cover, the cushioning properties of the main body can be improved. That is, the main body is formed to be longer than the first bulge and the second bulge in the longitudinal direction and occupies a large portion of the entire cushion, so that the cushion as a whole can have good cushioning properties.

In addition, if the main body is composed of a body cover and a plate-shaped urethane material that is retractably arranged inside the body cover and has the same size as the main body cover, the cushioning properties of the main body can be improved, and the user can select a structure in which the urethane material is arranged inside the body cover or a structure in which it is not arranged, and the cushioning properties of the main body can be varied according to the user's preference. That is, for example, in cases where the cushion is used as a pillow or where the overall shape of the cushion is deformed into a concave shape, it may be more convenient to use the cushion without placing urethane material inside the body cover, and this is also easily applicable to such usage modes.

In addition, when the urethane material is covered with an inner cover that can be placed inside the main body cover and that can house the urethane material inside, the insertion work becomes easier when inserting the urethane material inside the main body cover. In other words, in a structure where the urethane material is not covered with an inner cover, due to the nature of the urethane material, the surface of the urethane material is likely to get caught on the inner circumference of the main body cover, making the insertion work more time-consuming. Here, by covering the urethane material with an inner cover, the possibility of the urethane material getting caught is reduced, making it easier to insert the urethane material inside the main body cover.

In addition, if the body cover body is provided with a body cover opening/closing section that allows the state of the body cover body to be switched between an open state in which an opening is formed to allow the urethane material and the inner cover to be inserted and removed, and a closed state in which the opening is closed, the urethane material and the inner cover can be inserted inside the body cover body and the opening is closed by the body cover opening/closing section, making it difficult for the inserted position to shift and preventing the urethane material and the inner cover from popping out of the body cover body.

In addition, if the bulge cover body is formed with a bulge cover opening/closing section that allows the state of the bulge cover body to be freely switched between an open state in which an opening is formed to allow the cushion filling material or the expandable/contractible cushion material to be inserted and removed, and a closed state in which the opening is closed, the cushion filling material or the expandable/contractible cushion material can be inserted inside the main body cover body and the opening is closed by the main body cover opening/closing section, making it difficult for the inserted position to shift and preventing the cushion filling material or the expandable/contractible cushion material from flying out of the main body cover body.

Furthermore, if multiple loops through which a string or belt can be inserted are formed in at least one of the main body, the first bulge, the second bulge, the first connection, or the second connection, the cushion can be easily secured to the back or seat of a chair or the like via the string or belt by passing the string or belt through the multiple loops. This can improve the stability of the cushion when it is installed on a chair or car seat. Furthermore, when the cushion is introduced in, for example, a hospital or a care facility, the installation position of the cushion can be fixed, improving convenience.

In addition, if the main body is composed of a main body cover and multiple strips of urethane material that are arranged inside the main body cover in a direction parallel to the short side of the main body and that divide the main body into multiple bulging sections along the longitudinal direction of the main body, multiple strips of urethane material can be inserted and removed from the inside of the main body cover to give the main body a shape that is not one large bulge, but is divided into multiple bulging sections along the longitudinal direction of the main body. This makes it easier to fit the main body around the user's waist and neck, and increases the number of points where the main body comes into contact with the body, making it possible to support parts of the body more stably.

In order to achieve the above object, the cushion arrangement structure of the present invention is a cushion arrangement structure in which the cushion described in any one of claims 1, 8 or 11 is arranged on a chair having a seat, a backrest and armrests on the outside of both ends of the seat, and the cushion is arranged so that one surface of the main body is located on the backrest, the first bulge is located along the extension direction of one side of the armrest and bent toward the other surface of the main body, and the second bulge is located along the extension direction of the other side of the armrest and bent toward the other surface of the main body.

Here, by placing a cushion on the backrest so that one side of the main body is positioned thereon, the other side of the main body can be placed against the user's lower back when in a seated position, thereby maintaining the seated position.

In addition, the first bulge is positioned along the extension direction of one side of the armrest and bent toward the other side of the main body, and the second bulge is positioned along the extension direction of the other side of the armrest and bent toward the other side of the main body. This allows the first bulge or the second bulge to be positioned between the sides of the armpits and waist of the user and the two armrests of the chair, respectively, to support the sides of the armpits and waist of the user in a seated position.

In addition, in a cushion arrangement structure in which a second cushion is arranged on top of a first cushion arranged on the backrest, the main body of the second cushion is hooked onto the upper part of the backrest and the upper edge of the main body of the first cushion, and the second cushion is arranged so that one of the first bulges or the second bulges of the second cushion is located on the surface of the main body of the first cushion facing the user, the two cushions can adequately support the sides of the armpits and waist and the back of the user in a seated position. In addition, since one of the first bulges or the second bulges of the second cushion is located on the main body of the first cushion, with the waist supported by the main body of the first cushion, one bulge of the second cushion further supports the back of the user, resulting in a structure that makes it easy to support the back of a user with a hunched back or round shoulders.

In order to achieve the above object, the cushion arrangement structure of the present invention is a cushion arrangement structure in which the cushion described in any one of claims 1, 8 or 11 is arranged on a chair having a seat, a backrest, and armrests on the outside of both ends of the seat, and the cushion is arranged so that one surface of the main body is located on the seat, the first bulge is located along the vertical direction of one side of the armrest and bent toward the other surface of the main body, and the second bulge is located along the vertical direction of the other side of the armrest and bent toward the other surface of the main body.

Here, by placing a cushion on the seat so that one side of the main body is positioned on the seat, the other side of the main body can be placed against the user's buttocks when in a seated position, thereby maintaining the seated position.

In addition, by positioning a first bulge along the vertical direction on one side of the armrest and bent toward the other side of the main body, and by positioning a second bulge along the vertical direction on the other side of the armrest and bent toward the other side of the main body, the first bulge or the second bulge is positioned between the sides of the armpits and waist of the user and the two armrests of the chair, respectively, and it is possible to support the sides of the armpits and waist of the user in a seated position.

In order to achieve the above object, the cushion arrangement structure of the present invention is a cushion arrangement structure in which the cushion described in any one of claims 1, 8 or 11 is arranged on an automobile seat having a seat surface, a backrest and an armrest arranged on the inside of the vehicle, and the cushion is arranged on the backrest so that one side of the main body and the first bulge folded toward the one side of the main body are located, and the second bulge folded along the extension direction of the armrest and toward the other side of the main body are located.

Here, by positioning the first bulge bent toward one side of the main body and the main body, and the second bulge bent toward the other side of the main body along the extension direction of the armrest, the sides of the user's armpits and waist can be adequately supported in a car seat that has an armrest on the inside of the vehicle. In other words, by positioning the second bulge along the armrest and positioning the first bulge bent toward the backrest on the opposite side of the seat without the armrest, two bulges can be positioned in a shape that matches the presence or absence of an armrest.

In order to achieve the above object, the cushion arrangement structure of the present invention is a cushion arrangement structure in which the cushion described in any one of claims 1, 8 or 11 is arranged on a chair having a seat and a backrest or a bed having a reclining backrest, and the main body is hooked onto the upper part of the backrest, and the cushion is arranged so that either the first bulge or the second bulge is located on the user-facing surface of the backrest.

Here, the main body is hooked onto the top of the backrest, and the cushion is arranged so that either the first bulge or the second bulge is located on the surface of the backrest facing the user, so that either the first bulge or the second bulge can be positioned at any height on the backrest and the other can hang down on the side of the backrest opposite the user's side, allowing the bulge positioned on the backrest side to support the user's body. For example, the user's lower back, back, cervical vertebrae, head, etc. can be supported by either the first bulge or the second bulge.

In order to achieve the above object, the cushion arrangement structure of the present invention is a cushion arrangement structure in which the cushion described in any one of claims 1, 8 or 11 is arranged on a bed having a reclining backrest, and the cushion is arranged in a state in which the main body is wrapped around one of the first bulge portion and the second bulge portion as a core toward the other bulge portion, and the other bulge portion is positioned below the one bulge portion along the backrest.

Here, the cushion is arranged with the main body wrapped around one of the first and second bulges as a core toward the other bulge, and the other bulge is positioned below the one bulge along the backrest, so that it can be arranged as a cushion with a shape consisting of one bulge and a part enlarged by wrapping the main body around the bulge. That is, it is possible to arrange a cushion with two bulges of significantly different sizes. With this, for example, the backrest of a bed with a reclining function can be tilted, and the bulge around which the main body is wrapped can be placed on the upper side and the bulge around which the main body is not wrapped can be placed on the lower side, so that the cushion can be arranged along the cervical vertebrae and head of the user. That is, for example, by using it on a person who is receiving cosmetic care such as meal assistance, dental treatment, oral care, tooth brushing, or shaving on the bed, the position and angle of the user's jaw can be adjusted, and the service can be provided in a comfortable position. Additionally, for the service provider, the user's posture is maintained and the head position is stabilized, allowing the service to be provided safely.

To achieve the above object, the cushion arrangement structure of the present invention is a cushion arrangement structure in which the cushion described in any one of claims 1, 8, or 11 is arranged on a chair having a seat and a backrest or a bed having a reclining backrest, and the cushion is arranged in a state in which one surface of the main body portion is located on the backrest and the first bulge portion and the second bulge portion are folded toward the other surface side of the main body portion.

Here, one side of the main body is positioned on the backrest, and the cushion is placed with the first bulge and the second bulge folded toward the other side of the main body. This makes it possible to place a thicker cushion on the backrest, with the thickness of the main body and the thickness of the two bulges, and to firmly support the user's back with the thicker part of the cushion. In addition, because the two bulges support the user's back, swaying of the body from side to side can be suppressed.

In order to achieve the above object, the cushion arrangement structure of the present invention is a cushion arrangement structure in which two cushions according to any one of claims 1, 8, or 11 are arranged on a chair having a seat and a backrest or a bed having a reclining backrest, and the first cushion, which is the first cushion, is arranged so that the main body of the first cushion is hooked on the upper part of the backrest and one of the first bulge or the second bulge of the first cushion is located on the surface of the backrest facing the user, and the second cushion, which is the second cushion, is arranged so that the main body of the second cushion is overlapped over a part of the main body of the first cushion and the one bulge of the first cushion, and the first bulge and the second bulge of the second cushion are folded toward the surface of the main body of the second cushion opposite to the surface facing the first cushion.

Here, the main body of the first cushion is hooked onto the top of the backrest, and the first cushion is positioned so that either the first bulge or the second bulge of the first cushion is positioned on the surface of the backrest facing the user, so that one of the bulges of the first cushion can be positioned on the backrest to support the user's shoulders and cervical vertebrae.

In addition, the main body of the second cushion is arranged to overlap a part of the main body of the first cushion and one of the bulges of the first cushion, and the second cushion is arranged in a state in which the first bulge and the second bulge of the second cushion are folded toward the surface of the main body of the second cushion opposite to the surface facing the first cushion. This makes it possible to stack the second cushion, which has a thicker cushion shape, on top of the first cushion to firmly support the user's body. In particular, while the first cushion supports the user's shoulders and cervical vertebrae, the two bulges of the second cushion can stably support a wide area from the user's shoulders to the back of the head. In addition, the two bulges support the user's back, preventing the body from swaying side to side. Furthermore, since the first cushion and the second cushion are stacked, the feeling of use can be further improved in the parts of the body supported by the two cushions, such as the user's head.

In order to achieve the above object, the cushion arrangement structure of the present invention is a cushion arrangement structure in which two cushions according to any one of claims 1, 8 and 11 are arranged on a chair having a seat, a backrest and armrests on the outside of both ends of the seat, and the first cushion, which is the first cushion, is arranged such that one surface of the main body of the first cushion is located on the seat, the first bulge of the first cushion is bent along the vertical direction of one side of the armrest and toward the other surface side of the main body of the first cushion, and the other bulge of the main body of the first cushion is located along the vertical direction of the other side of the armrest and toward the other surface side of the main body of the first cushion. The second cushion is positioned so that one side of the main body of the second cushion is positioned on the backrest above the first cushion, and the first bulge of the second cushion is positioned along the extension direction of one side of the armrest and toward the other side of the main body of the second cushion, and the second bulge of the second cushion is positioned along the extension direction of the other side of the armrest and toward the other side of the main body of the second cushion.

Here, one surface of the main body of the first cushion is positioned on the seat surface, and one surface of the main body of the second cushion is positioned on the backrest above the first cushion, so that the cushion can have a certain length even in the direction along the short side of the main body of the first cushion. As a result, for example, when placing a cushion on a chair that has a backrest and a seat surface, by placing the main body of the first cushion on the backrest side and the main body of the second cushion on the seat surface side, it is possible to support a wide range of body parts, from the user's buttocks, lower back, and back.

In addition, the first bulge of the first cushion is positioned along the vertical direction on one side of the elbow rest and toward the other side of the main body of the first cushion, and the second bulge of the first cushion is positioned along the vertical direction on the other side of the elbow rest and toward the other side of the main body of the first cushion. The first bulge of the second cushion is positioned along the extension direction on one side of the elbow rest and toward the other side of the main body of the second cushion, and the second bulge of the second cushion is positioned along the extension direction on the other side of the elbow rest and toward the other side of the main body of the second cushion. As a result, the left and right sides of the user's waist, the left and right sides of the back, and the outsides of both arms and both shoulders can be stably supported by each bulge. That is, the first and second bulges of the first cushion, located on the seat side, can support both the left and right sides of the user's lower back. Also, the first and second bulges of the second cushion, located on the backrest side, can support both the left and right sides of the user's back, and the outside of both arms and shoulders. In this way, the four bulges can stably support the user, wrapping around both the left and right sides of the body.

In order to achieve the above object, the cushion arrangement structure of the present invention is a cushion arrangement structure for arranging the cushion according to claim 7 in a chair having a seat, a backrest, and armrests on the outside of both ends of the seat, in which one surface of the first main body and the upper and lower connection parts are arranged along the backrest, one surface of the second main body is arranged on the seat, the third bulge is arranged along the vertical direction of one side of the armrest and bent toward the other surface of the second main body, and the fourth bulge is arranged along the vertical direction of the other side of the armrest and bent toward the other surface of the second main body, the first bulge is arranged along the extending direction of one side of the armrest and bent toward the other surface of the first main body, and the second bulge is arranged along the extending direction of the other side of the armrest and bent toward the other surface of the first main body.

Here, one surface of the first main body and the upper and lower connecting parts are arranged along the backrest, and one surface of the second main body is arranged on the seat, so that the cushion can have a certain length even in the direction along the short side of the first main body. For example, when placing the cushion on a chair having a backrest and a seat, by placing the first main body and the upper and lower connecting parts on the backrest side and the second main body on the seat side, it is possible to support a wide range of body parts from the user's buttocks, lower back, and back.

In addition, the third bulge is bent along the vertical direction of one side of the armrest and toward the other side of the second main body, and the fourth bulge is bent along the vertical direction of the other side of the armrest and toward the other side of the second main body. The first bulge is bent along the extension direction of one side of the armrest and toward the other side of the first main body, and the second bulge is bent along the extension direction of the other side of the armrest and toward the other side of the first main body. This allows the left and right sides of the user's waist, the left and right sides of the back, and the outsides of both arms and both shoulders to be stably supported by each bulge. In other words, the third bulge and the fourth bulge located on the seat side can support both the left and right sides of the user's waist. In addition, the first and second bulges located on the backrest side can support the left and right sides of the user's back, as well as the outside of both arms and shoulders. In this way, the four bulges can stably support the user, wrapping around both the left and right sides of the body.

The cushion and cushion arrangement structure of the present invention can support and maintain the user's sitting posture or the posture of the back and head, and is easy to use and can be used for a wide range of purposes, such as furniture chairs, wheelchairs, hairdressing chairs, hair washing chairs, car seats, and beds with reclining functions.

1A is a schematic plan view of a cushion according to an embodiment of the present invention, and FIG. 1B is a schematic front view of the cushion shown in FIG. 1(a) is a schematic bottom view of the cushion shown in FIG. 1(a), and FIG. 1(b) is a schematic side view of the cushion shown in FIG. 1(a) is a schematic perspective view of the cushion shown in FIG. 1(a) viewed diagonally from above, and FIG. 1(b) is a schematic perspective view showing the shape of the cushion shown in FIG. 1(a) with a main body portion wrapped around one of the bulges. FIG. 2 is a schematic diagram showing an arrangement of cushions in a furniture chair according to the first embodiment. FIG. 2 is a schematic diagram showing the arrangement of cushions in the wheelchair according to the first embodiment. FIG. 2 is a schematic diagram showing the arrangement of cushions in the hair washing chair according to the first embodiment. 13 is a schematic diagram showing the cushion arrangement structure in a hairdressing chair in the second embodiment. FIG. FIG. 13 is a schematic diagram showing an example of an arrangement structure of cushions in a furniture chair in the third embodiment. FIG. 13 is a schematic diagram showing another example of the cushion arrangement structure of the furniture chair in the third embodiment. FIG. 13 is a schematic diagram showing an example of an arrangement structure of cushions in a bed according to a third embodiment. FIG. 13 is a schematic diagram showing another example of the cushion arrangement structure in the bed in the third embodiment. FIG. 13 is a schematic diagram showing an arrangement of cushions in a bed according to a fourth embodiment. FIG. 13 is a schematic diagram showing an arrangement of cushions in a bed according to a fifth embodiment. FIG. 13 is a schematic diagram showing the arrangement of cushions in a car seat in a sixth embodiment. FIG. 15 is a schematic diagram showing the cushion arrangement structure of FIG. 14 with a seat occupant sitting on the seat. FIG. 23 is a schematic diagram showing the cushion arrangement structure of a furniture chair in the seventh embodiment. FIG. 23 is a schematic diagram showing the cushion arrangement structure of a furniture chair in the eighth embodiment. FIG. 23 is a schematic diagram showing the arrangement of cushions in a bed according to the ninth embodiment. 13A and 13B are schematic diagrams showing the structure of a cushion in a tenth embodiment, in which (a) is a schematic rear view and (b) is a schematic back view. 11A and 11B are schematic diagrams showing the structure of the cushion in the eleventh embodiment, where (a) is a schematic oblique view showing the upper main body portion and the lower main body portion separated, and (b) is a schematic oblique view showing the upper main body portion and the lower main body portion connected. A schematic diagram showing the structure of a cushion in a twelfth embodiment. A schematic diagram showing the cushion arrangement structure of a furniture chair in the twelfth embodiment. 13A and 13B are schematic diagrams showing the structure of a cushion in a thirteenth embodiment, in which (a) is a schematic plan view, and (b) is a schematic perspective view showing the folded shape when placed on a chair. A schematic diagram showing the structure of a modified cushion in the thirteenth embodiment. 14A to 14C are schematic diagrams showing the structure of a cushion in a fourteenth embodiment, where (a) is a schematic oblique view, (b) is a schematic back view, and (c) is a schematic front view. 25(a) to (d) are schematic diagrams showing various shapes obtained by deforming the cushion shown in FIG. 25(a). 23A and 23B are schematic diagrams showing the structure of a modified example of the cushion in the fourteenth embodiment. 15A and 15B are schematic diagrams showing the structure of the cushion in the fifteenth embodiment, where (a) is a schematic diagram showing the cushion inner material and the expandable cushion material made of a cover body and urethane chip material, and (b) is a schematic enlarged diagram showing the cushion inner material and the expandable cushion material made of urethane chip material. 15A and 15B are schematic diagrams showing the structure of the cushion in the fifteenth embodiment, where (a) is a schematic diagram showing the state before the expandable cushion material is inserted into the cover body, and (b) is a schematic diagram showing the state after the expandable cushion material is inserted into the cover body. 15 is a schematic diagram showing the structure of a cushion in a fifteenth embodiment, where (a) is a schematic diagram showing a cover body and multiple cushion inner materials with different amounts of urethane chip material, and (b) is a schematic diagram showing a cover body and multiple cushion inner materials with different amounts of urethane chip material and a small-sized expandable cushion material. 15A and 15B are schematic diagrams showing the structure of a modified cushion in the fifteenth embodiment, in which (a) is a schematic diagram showing the state before the main body expandable cushion material is inserted into the cover body, (b) is a schematic diagram showing the state after the main body expandable cushion material has been inserted into the cover body, and (c) is a schematic diagram showing the state before the plate-shaped urethane material is inserted into the cover body. A schematic diagram showing the structure of the cushion in the sixteenth embodiment. 17A and 17B are schematic diagrams showing the structure of the cushion in the seventeenth embodiment, where (a) is a schematic diagram showing the cover body, and (b) is a schematic diagram showing the partition seam and the cylindrical space in the cover body. 17A and 17B are schematic diagrams showing the structure of the cushion in the seventeenth embodiment, where (a) is a schematic diagram showing the state before the cushion inner material made of elongated urethane chip material is inserted into the cover body, and (b) is a schematic diagram showing the state after the cushion inner material made of elongated urethane chip material is inserted into the cover body. 17A and 17B are schematic diagrams showing the structure of a modified cushion in the 17th embodiment, in which (a) is a schematic diagram showing the state before an elongated, expandable cushion material is inserted into the cover body, and (b) is a schematic diagram showing the state before a strip-shaped urethane material is inserted into the cover body. FIG. 1 is a schematic exploded view showing the structure of a seating support cushion of a conventional wheelchair.

Below, we will explain the form for implementing the present invention with reference to the drawings.

Cushion A, which is an example of a cushion to which the present invention is applied, comprises a main body portion 1, a bulge portion 2, and a bulge portion 3 (see Figures 1(a), 1(b), 2(a), and 3(a)).

In the following description, with reference to FIG. 1(a), the direction of bulge 3 as seen from bulge 2 is referred to as right or rightward, and the direction of bulge 2 as seen from bulge 3 is referred to as left or leftward. With reference to FIG. 1(b), the upper side of the paper in the figure is referred to as top or upward, and the lower side of the paper in the figure is referred to as bottom or downward. The direction connecting left and right is referred to as the left-right direction or horizontal direction. The direction connecting top and bottom is referred to as the top-bottom direction or thickness direction.

Furthermore, based on FIG. 1(b), the surface of cushion A on the upper side of the paper will be referred to as the front side or front side, and the surface on the lower side of the paper will be referred to as the back side or back side.

Here, main body portion 1 is the main body of cushion 1 and is a band-shaped member that connects bulge portion 2 and bulge portion 3.

In addition, bulge portion 2 and bulge portion 3 form the left and right ends of cushion 1 and are thicker than main body portion 1.

As shown in FIG. 1(b), the cross-sectional shape of bulge portion 2 and bulge portion 3 along the longitudinal direction of cushion A is formed to be approximately elliptical.

As shown in FIG. 1(b), the main body 1 is connected to the bulge 2 and the bulge 3 at approximately the center in the vertical direction.

In addition, bulge portion 2 and bulge portion 3 are configured so that they can be bent toward main body portion 1 on both the front and back sides of main body portion 1.

In addition, bulge 2 or bulge 3 can be rotated toward the other bulge while wrapping main body 1 around it to create a shape with a greater thickness.

For example, FIG. 3(b) shows the shape in which the main body 1 is wrapped around the bulge 3 and the bulge 3 is rotated toward the bulge 2.

In the shape shown in FIG. 3(b), the thickness of the portion where the main body 1 is wrapped around the bulge 3 is greater than the thickness of the bulge 2. In this way, the cushion A can be shaped to have a two-stage thickness by wrapping the main body 1 around one of the bulges, and having a portion with a greater thickness.

Here, it is not necessary that the cross-sectional shape of the bulge 2 and the bulge 3 along the longitudinal direction of the cushion A is formed to be approximately elliptical, and there is no particular limitation on the shape as long as the cross-sectional shape is formed to be thicker than the main body 1. However, it is preferable that the cross-sectional shape of the bulge 2 and the bulge 3 along the longitudinal direction of the cushion A is formed to be approximately elliptical, since this gives the two bulges a rounded, soft shape and increases the area of the bulges that come into contact with the body, resulting in a good feel when used.

In addition, the main body 1 does not necessarily have to be connected to the approximate center of the bulge 2 and the bulge 3 in the vertical direction. However, as described below, when the bulge 2 and the bulge 3 are folded toward the front side or the back side, each bulge is easily folded evenly toward either the front or back side, and the shape is easily changed to position the cushion A. Therefore, it is preferable that the main body 1 is connected to the approximate center of the bulge 2 and the bulge 3 in the vertical direction.

Cushion A is constructed by putting a cushion inner material into the cover body. More specifically, cushion A is constructed by putting a cushion inner material into the parts corresponding to bulge portion 2 and bulge portion 3 on the left and right end sides of the cover body.

In other words, the main body 1 is composed only of a cover body that does not contain a cushion filling, and the bulge 2 and bulge 3 are composed of a cover body that contains a cushion filling.

The cover body can be made of cloth or synthetic leather, for example. The cushion inner material can be made of hard urethane or soft urethane, for example.

Here, cushion A does not necessarily have to be constructed by putting a cushion inner material in the cover body. For example, main body portion 1, bulge portion 2, and bulge portion 3 can be integrally formed from a material with an appropriate softness suitable for a cushion. On the other hand, it is also possible to have a structure in which the cushion inner material is contained not only in bulge portion 2 and bulge portion 3, but also in the part of the cover body corresponding to main body portion 1.

The material of the cover that constitutes the cushion A is not particularly limited as long as it is a material suitable for a cushion. For example, cotton, polyester, linen, synthetic leather, etc., regardless of whether it is a natural material or an artificial material, can be used as appropriate.

The material of the cushion filling that constitutes the cushion A is not particularly limited as long as it is a material suitable for cushion filling. For example, polyurethane, polyester cotton, bead material, feathers, etc. can be used as appropriate.

As shown in FIG. 2(a), multiple anti-slip sections 10 are provided on the back side of the main body 1. The anti-slip sections 10 are semi-spherical members made of rubber, and multiple anti-slip sections 10 are formed on the back side of the main body 1. They act as anti-slip sections when the cushion A is placed on the seat of a chair, etc.

As shown in FIG. 2(b), the shape of cushion A seen from the side corresponds to the shape of bulge 3 (or bulge 2) seen from the side, and is an elliptical shape that is elongated in the width direction.

Next, the size of cushion A will be explained. Note that the size of cushion A shown here is merely an example, and the size of each part of a cushion to which the present invention is applied can be set as appropriate.

First, in terms of the length along the longitudinal direction of the cushion A, i.e., the left-right direction, the length of the main body 1 (symbol _X1 ) is 390 mm, and the lengths of the bulging portions 2 and 3 (symbol _X2 ) are each 140 mm (see FIG. 1(a)). Also, the length along the short side of the cushion A, i.e., the width direction (symbol _Y1 ), is 300 mm.

Regarding the size of the cushion A in the vertical direction, i.e., the thickness direction, the thickness of the main body 1 (symbol _Z1 ) is 10 mm, and the thickness of the bulge portions 2 and 3 (symbol _Z2 ) is 80 mm (see FIG. 1(b)).

Here, the length of cushion A along the left-right direction is not necessarily limited to the above length. However, as described below, from the viewpoint of easily folding bulge portion 2 and bulge portion 3 onto the front or back side of main body portion 1 to form a thicker cushion shape, it is preferable that the length of main body portion 1 in the left-right direction be at least twice the length of bulge portion 2 and bulge portion 3. Also, from the viewpoint of a good balance between the lengths of main body portion 1 and bulge portion 2 and bulge portion 3 and making it easier to place cushion A on the backrest or seat of a chair, it is preferable that the length of main body portion 1 be no more than three times the length of bulge portion 2 and bulge portion 3.

The length of the main body 1 in the left-right direction and the thickness in the up-down direction are not necessarily limited to the above sizes. However, since it is easier to place the cushion A on the seat or back of a chair or wheelchair that has armrests on both sides of the seat, the length of the main body 1 in the left-right direction is preferably about 280 mm to 900 mm, and more preferably about 280 mm to 500 mm. The thickness of the main body 1 in the up-down direction is preferably about 4 mm to 12 mm, for example.

The length in the left-right direction and the thickness in the up-down direction of bulges 2 and 3 are not necessarily limited to the above sizes. However, when cushion A is placed on the seat or back of a chair or wheelchair with armrests on both sides of the seat, bulges 2 and 3 are placed between the user's body (waist) and the armrests, making it easier to support the body. Therefore, the length of bulges 2 and 3 in the left-right direction is preferably about 120 mm to 300 mm, and more preferably about 120 mm to 160 mm. The thickness of bulges 2 and 3 in the up-down direction is preferably about 60 mm to 160 mm, for example.

Furthermore, in the vertical direction, it is preferable that the thickness of bulge portion 2 and bulge portion 3 is within a range of 5 to 40 times the thickness of main body portion 1.

The length of cushion A in the width direction is not necessarily limited to the above size. However, from the viewpoint of placing main body 1 of cushion A on the seat surface of a chair or wheelchair, it is preferable that the length of cushion A in the width direction be approximately 300 mm to 420 mm.

Next, an example of a cushion arrangement structure to which the present invention is applied will be described below.

[First embodiment]
In the first embodiment of the present invention, a cushion A is arranged along the back and armrests of a chair. As shown in Fig. 4, the cushion A is arranged on a chair 4 having a backrest 40 and two armrests 41 and 42. The chair 4 is a piece of furniture. The cushion arrangement structure of the first embodiment of the present invention can also be applied to the cushion arrangement structures of cushions L, G, H, I, J, K, and M, which will be described later, and their modified examples.

The underside of the main body 1 of the cushion A abuts against the surface of the backrest 40 of the chair 4. The bulge 2 of the cushion A is bent along the armrest 41 and toward the surface of the main body 1. The bulge 3 of the cushion A is bent along the armrest 42 and toward the surface of the main body 1.

That is, the bulge portions 2 and 3 are bent at approximately 90 degrees relative to the main body portion 1, and are arranged along the two armrests 41 and 42 of the chair 4. In addition, the bulge portions 2 and 3 can be easily bent, allowing the overall shape of the cushion A to be easily changed.

Here, it is not necessary that the bulge portions 2 and 3 are bent at approximately 90 degrees relative to the main body portion 1, but the cushion A can be positioned by bending the bulge portions 2 and 3 to match the shape of a chair with two armrests, i.e., to match the angle of the armrests.

In addition, the anti-slip portion 10 on the underside of the main body 1 abuts against the surface of the backrest 40 of the chair 4, making it difficult for the position of the main body 1 to shift relative to the backrest 40.

In the arrangement of cushion A shown in Figure 4, cushion A contacts the lower back of a person sitting on chair 4 from the left and right sides to the rear (back side) of the person's waist, and can support and maintain the seated posture of the person.

More specifically, the left and right sides of the waist are firmly supported by bulge 2 or bulge 3, which is located between the waist and armrest 41 or 42. Because bulge 2 and bulge 3 are formed to be thick, they fill the space between the waist and armrest 41 or 42, and even when the seated person leans to the left or right and weight is applied, bulge 2 or bulge 3 can adequately support the sides of the waist of the seated person.

The arrangement structure in the first embodiment can be used not only for furniture chairs such as chair 4, but also for other types of chairs.

For example, as shown in FIG. 5, cushion A can also be applied to a wheelchair 5. Wheelchair 5 has a backrest 50 and two armrests 51 and 52, and cushion A can be arranged in the same manner as chair 4.

For example, as shown in FIG. 6, a cushion A can be placed on a hair washing chair 6. The hair washing chair 6 has a backrest 60 and two armrests 61 and 62. The backrest 60 of the hair washing chair 6 also has a reclining function.

As shown in FIG. 6, the backrest 60 of the hair washing chair 6 can be tilted toward the hair washing station, and the cushion A can be placed in this inclined position.

In the hair washing chair 6, the seated person also leans backward in accordance with the inclination of the backrest 60, but even in this position, the cushion A abuts the seated person's lower back from the left and right sides to the rear, supporting and maintaining the seated position of the seated person.

As described above, in the first embodiment of the present invention, cushion A is arranged along the back and armrests of the chair, and cushion A abuts the occupant's lower back over the range from the left and right sides to the rear, supporting and maintaining the seated posture of the occupant. In addition, cushion A can be deformed to provide a highly stable arrangement.

[Second embodiment]
The second embodiment of the present invention differs from the first embodiment in that the cushion A is arranged along the seat and armrests of the chair, and the main body 1 is arranged on the seat of the chair. The cushion arrangement structure of the second embodiment of the present invention can also be applied to the cushion arrangement structures of the cushions L, G, H, I, J, K, and M and their modified examples, which will be described later.

As shown in FIG. 7, a cushion A is placed on a hairdressing chair 7 having a backrest 70, a seat 71, two armrests 72 and an armrest 73. The backrest 70 of the hairdressing chair 7 has a reclining function.

As shown in FIG. 7, the underside of the main body 1 of the cushion A abuts against the surface of the seat 71 of the chair 7. The bulge 2 of the cushion A is bent along the armrest 72 and toward the surface of the main body 1. The bulge 3 of the cushion A is bent along the armrest 73 and toward the surface of the main body 1.

That is, the bulge portions 2 and 3 are bent at approximately 90 degrees relative to the main body portion 1 disposed on the seat surface 71, and the bulge portions 2 and 3 are disposed along the two armrests 72 and 73 of the chair 4, respectively. In addition, the bulge portions 2 and 3 can be easily bent, allowing the overall shape of the cushion A to be easily changed.

Here, it is not necessary that the bulge portions 2 and 3 are bent at approximately 90 degrees relative to the main body portion 1, but the cushion A can be positioned by bending the bulge portions 2 and 3 to match the shape of a chair with two armrests, i.e., to match the angle of the armrests.

In addition, the anti-slip portion 10 on the underside of the main body 1 abuts against the surface of the seat 71 of the chair 7, making it difficult for the position of the main body 1 to shift relative to the seat 71.

In the arrangement of cushion A shown in FIG. 7, cushion A abuts against the left and right sides of the buttocks and lower back of a person sitting on chair 7, and can support and maintain the sitting posture of the person.

More specifically, the main body 1 of the cushion A supports the buttocks of the seated person on the seat surface 71 of the chair 7, providing a comfortable seating surface.

The left and right sides of the waist are firmly supported by bulge 2 or bulge 3, which is located between the waist and armrest 72 or armrest 72. Because bulge 2 and bulge 3 are made thick, they fill the space between the waist and armrest 72 or armrest 73, and even when the seated person leans to the left or right and puts weight on them, bulge 2 or bulge 3 can adequately support the sides of the waist of the seated person.

The arrangement structure in the second embodiment can be used not only in hairdressing chairs such as chair 7, but also in a wide range of other types of chairs, including furniture chairs, wheelchairs, hair washing chairs, and car seats.

As described above, in the second embodiment of the present invention, cushion A is arranged along the seat surface and armrests of the chair, and cushion A abuts against the left and right sides of the buttocks and lower back of the seated person, thereby supporting and maintaining the seated posture of the seated person. In addition, by giving cushion A a deformed shape, it is possible to achieve an arrangement structure with excellent stability.

[Third embodiment]
The third embodiment of the present invention is an embodiment in which cushion A is hung on the backrest of a chair having a seat and a backrest. The cushion arrangement structure of the third embodiment of the present invention can also be applied to the cushion arrangement structures of cushions L, G, H, I, J, K, and M and their modified examples, which will be described later.

For example, Figures 8 and 9 show an arrangement structure in which cushion A is placed on the backrest of a chair.

The chair 8 shown in Figures 8 and 9 has a backrest 80 and a seat 81. The chair 8 is a piece of furniture.

As shown in FIG. 8, the main body 1 of the cushion A is hooked onto the upper end of the backrest 80 of the chair 8. Furthermore, via the main body 1, the bulge 2 is located on the front side of the backrest 80, and the bulge 3 is located on the rear side of the backrest 80.

The back surface of the main body 1 is in contact with the surface of the backrest 80 of the chair 8. The bulge 2 is located on the upper side of the backrest 80.

In addition, by positioning the bulge 3 on the underside of the backrest 80, it is possible to balance it with the bulge 2 located on the front side of the backrest 80, and to maintain the main body 1 hooked onto the upper end of the backrest 10.

The cushion A arrangement shown in Figure 8 is designed so that when a person sits on the chair 8, the bulge 2 is likely to come into contact with the back of the person, particularly the upper part of the back, shoulder blades, spine, etc. With this arrangement, for example, when a person with a hunched back or hunched shoulders sits on the chair 8, the bulge 2 comes into contact with the upper part of the rounded back, supporting the back and improving the comfort of the sitting position.

In addition, in FIG. 9, similar to FIG. 8, the main body 1 of the cushion A is hooked onto the upper end of the backrest 80 of the chair 8. Furthermore, via the main body 1, the bulge 2 is located on the front side of the backrest 80, and the bulge 3 is located on the rear side of the backrest 80.

In addition, in FIG. 9, the back surface of the main body 1 abuts against the surface of the backrest 80 of the chair 8. Also, unlike FIG. 8, in FIG. 9, the bulge 2 is located on the lower side of the backrest 80.

In addition, by positioning the bulge 3 on the underside of the backrest 80, it is possible to balance it with the bulge 2 located on the front side of the backrest 80, and to keep the main body 1 hooked onto the upper end of the backrest 80.

The cushion A arrangement shown in FIG. 9 is designed so that when a person sits on the chair 8, the bulge 2 is likely to come into contact with the person's back or lower back, particularly from the lower part of the back to the rear of the lower back. With this arrangement, for example, when a person with lower back pain sits on the chair 8, the bulge 2 comes into contact with the lower part of the back to the rear of the lower back, supporting the lower back and improving the comfort of the sitting position.

In addition, in the arrangement of the cushion A shown in Figures 8 and 9, the height position of the bulge 2 on the surface side of the backrest 80 can be changed as appropriate to suit the physique and posture of the seated person.

As a third embodiment of the present invention, we will explain how to position a cushion A on a bed with a reclining backrest.

The bed 9 shown in Figures 10 and 11 has a backrest 90. The backrest 90 also has a reclining function.

As shown in FIG. 10, the main body 1 of the cushion A is hooked onto the upper end of the backrest 90 of the bed 9. The backrest 90 is also tilted so that the user's line of sight is directed diagonally upward.

In addition, the bulge 2 is located on the front side of the backrest 90 via the main body 1. In addition, although not shown, the bulge 3 is located on the back side of the backrest 90.

The back surface of the main body 1 is in contact with the surface of the backrest 90 of the bed 9. The bulge 2 is positioned on the backrest 90 at a position corresponding to the cervical vertebra P1 of the user.

In addition, by positioning the bulge 3 on the underside of the backrest 90, it is possible to balance it with the bulge 2 located on the front side of the backrest 90, and to keep the main body 1 hooked onto the upper end of the backrest 90.

The cushion A arrangement shown in FIG. 10 is designed so that the bulge 2 easily comes into contact with the user's cervical vertebrae P1 when the user lies down with his or her back against the backrest 90 of the bed 9. In this arrangement, the bulge 2 supports the user's cervical vertebrae P1, making it easier for the user to assume a position in which, for example, the user's chin P2 is raised diagonally upward.

In the arrangement of cushion A shown in FIG. 10, the user's chin P2 is raised, making it easier to provide various services, such as meal assistance, dental care, oral care, grooming such as shaving, and beauty services, on the bed 9. In other words, the user supported by cushion A maintains a stable posture even with chin P2 raised, and can receive services such as meal assistance in a comfortable position.

More specifically, for example, bedridden people or patients unable to get up can easily adjust the position and angle of their jaw when receiving services such as meal assistance, dental treatment, oral care, tooth brushing, shaving, and other grooming services.

This allows the user of cushion A to enjoy various services in a comfortable position. In addition, providers of various services can provide various services safely because the head of the user of cushion A is stabilized.

In Fig. 11, as in Fig. 10, the main body 1 of the cushion A is hooked onto the upper end of the backrest 90 of the bed 9. Also in Fig. 11, the backrest 90 is tilted.

In addition, via the main body 1, the bulge 2 is located on the front side of the backrest 90, and the bulge 3 is located at a position from the top end of the backrest 80 to the rear side. In addition, the rear surface of the main body 1 abuts against the front surface of the backrest 90 of the bed 9.

In the cushion A arrangement shown in FIG. 11, the user sits with the upper body raised against the bed 9, and the bulge 2 is designed to easily come into contact with the upper part P3 of the user's back. In this arrangement, the bulge 2 supports the upper part P3 of the user's back, making it easier for the user to look straight ahead.

In the arrangement of cushion A shown in Fig. 11, the user sits on bed 9 with their gaze facing straight ahead, making it easier to provide various services, such as meal assistance, dental care, oral care, grooming such as shaving, and beauty services, on bed 9. In other words, the user supported by cushion A has the upper part P3 of the user's back supported by bulge 2, and is able to receive services such as meal assistance in a comfortable position with their gaze facing straight ahead.

In more detail, for example, when a bedridden person or a patient who is unable to get up receives assistance with meals, dental treatment, oral care, teeth brushing, grooming such as shaving, or hairdressing and beauty services such as a haircut, it is necessary to raise the back of the bed and maintain a seated position with the person's back slightly away from the bed, and to make the eye level of the person sitting down the same as that of the caregiver or other service provider.

Generally, two service providers work together. For example, when a barber or hairdresser cuts a bedridden person's hair while they are lying in bed, one of them supports the person's back and head, while the other cuts the hair. If there is only one service provider, it would be difficult to cut the back of the head from the standpoint of ensuring safety.

In such a case, by configuring the cushion A in the arrangement shown in FIG. 11, the upper part P3 of the back of the user of the cushion A is supported by the bulge 2, stabilizing the posture with the gaze facing straight ahead, and various services can be provided to the user of the cushion A even if there is only one service provider.

By arranging the cushion A as shown in Figure 11, for example, the space between the bed and the head of the user of the cushion A is widened, ensuring that a barber or hairdresser can easily cut the back of the head.

In addition, by configuring the cushion A in the arrangement shown in Figure 11, the user of the cushion A can easily maintain a sitting posture with the upper body raised, and the line of sight is raised, making it easier to assist with eating, provide oral care, brush teeth, and perform other grooming tasks, which also helps prevent aspiration.

As described above, in the third embodiment of the present invention, in a chair having a seat and a backrest or a bed with a reclining function, cushion A can be hung and positioned on the backrest to stabilize the seated posture of a seated person or the posture of a user on the bed. Also, by changing the position of the bulge that supports the user, a highly stable configuration can be achieved.

[Fourth embodiment]
The fourth embodiment of the present invention describes an aspect in which a cushion A having a main body wrapped around one of the bulges is arranged in a bed having a reclining backrest. The cushion arrangement structure of the fourth embodiment of the present invention can also be applied to the cushion arrangement structures of cushions L, G, H, I, J, K, and M and their modified examples described below.

Figure 12 shows a user with their back against the backrest 90 of the bed 9 described above, with cushion A positioned behind their head.

The cushion A shown in FIG. 12 is arranged in the shape shown in FIG. 3(b). That is, the cushion A has a shape in which the main body 1 is wrapped around the bulge 3, while the bulge 3 is rotated toward the bulge 2.

In this cushion A, the thickness of the portion where the main body 1 is wrapped around the bulge 3 is greater than the thickness of the bulge 2, and the cushion A as a whole has a shape with two levels of thickness.

As shown in FIG. 12, the bulge 2 is positioned at a position corresponding to the user's cervical vertebrae P1, and the portion where the main body 1 is wrapped around the bulge 3 is positioned at a position corresponding to the back of the user's head P4.

In this way, by placing the cushion A, which has two different thicknesses, around the back of the head P4 of the user like a pillow, it is possible for the cushion A to adequately support the area from the cervical vertebrae P1 to the back of the head P4. In addition, because the portion where the main body 1 is wrapped around the bulge 3 has a large thickness, it is able to firmly support the relatively heavy head from the lower rear and stabilize the position of the head.

Furthermore, the structure is such that the occipital region P4 is supported by the portion of the main body 1 wrapped around the bulge 3, while the bulge 2 supports the user's cervical vertebrae P1, so the user's posture can be maintained and stabilized while reducing the burden on the user's neck.

In addition, in the arrangement of cushion A shown in FIG. 12, similar to the state in FIG. 10, a user supported by cushion A has a stable posture and can receive services such as meal assistance in a comfortable position. It also becomes easier to adjust the position and angle of the user's chin, allowing the user to receive various services in a comfortable position. Furthermore, providers of various services can provide various services safely, as the head of the user of cushion A is stabilized.

Note that, although the example given here is use in a bed with a reclining backrest, the usage situation is not limited to this, and for example, a similar cushion A arrangement structure can also be used in a chair with a reclining backrest.

[Fifth embodiment]
The fifth embodiment of the present invention describes an aspect in which a cushion A with a folded shape in which both bulges face the main body is arranged in a bed having a reclining backrest. The cushion arrangement structure of the fifth embodiment of the present invention can also be applied to the cushion arrangement structures of cushions L, G, H, I, J, K, and M and their modified examples described below.

Figure 13 shows a user with their back against the backrest 90 of the bed 9 described above, with cushion A placed on the upper part of their back and behind their shoulders.

The cushion A shown in FIG. 13 has a shape in which both the bulge 2 and the bulge 3 are folded toward the front side of the main body 1. The back side of the main body 1 abuts against the front surface of the backrest 90.

As shown in FIG. 13, bulge 2 and bulge 3 are positioned at a position corresponding to upper part P3 of the user's back. In addition, the thickness of main body 1 is added to bulge 2 and bulge 3, making them thicker than the thickness of bulge 2 and bulge 3 alone.

In this way, by placing cushion A, in which both bulge 2 and bulge 3 are folded toward the front surface of main body 1, at the position of upper part P3 of the user's back, the user can be supported more stably when sitting with the upper body raised against bed 9. In addition, when sitting, the user's gaze is directed straight ahead.

In addition, because both bulge 2 and bulge 3 support the left and right sides of the upper part P3 of the user's back, lateral swaying of the user's body can be further suppressed.

As a result, similar to the cushion A arrangement shown in FIG. 11 above, various services such as meal assistance, dental care, oral care, grooming such as shaving, and hairdressing and beauty services can be provided easily on the bed 9. That is, when a user is supported on the cushion A, the upper part P3 of the user's back is supported by the bulges 2 and 3, the user's gaze is directed straight ahead and the user can receive services such as meal assistance in a stable position.

In addition, the thickness of the main body 1 is added to the bulge 2 and the bulge 3, which not only improves the sense of stability during use, but also makes the feel during use even better. Also, the volume of the cushion A that fills the space between the backrest 90 of the bed 9 and the user's back is larger than the volume of the cushion A shown in FIG. 11, making it even easier for the user to raise the upper half of their body relative to the bed 9.

Note that, although the example given here is use in a bed with a reclining backrest, the usage situation is not limited to this, and for example, a similar cushion A arrangement structure can also be used in a chair with a reclining backrest.

Sixth embodiment
The sixth embodiment of the present invention describes a mode in which a cushion A is arranged in a car seat having one armrest, with one bulge folded toward the back side of the main body and the other bulge folded toward the front side of the main body along the armrest. The cushion arrangement structure of the sixth embodiment of the present invention can also be applied to the cushion arrangement structures of cushions L, G, H, I, J, K, and M and their modified examples described below.

Figures 14 and 15 show an automobile seat 100. The seat 100 has a backrest 101 and an armrest 102 provided on the inside of the vehicle. Also, no armrest is provided on the door side of the seat 100 (not shown). Also, the seat 100 is a driver's seat.

The cushion A shown in FIG. 14 has a bulge 2 folded toward the back side of the main body 1 and placed against the backrest 101. The bulge 3 is also folded along the armrest 102 toward the front side of the main body 1.

That is, the bulge 3 is bent at approximately 90 degrees relative to the main body 1 and is disposed along the armrest 102 of the seat 100. In addition, the bulge 2 and the bulge 3 can be easily bent, so that the overall shape of the cushion A can be easily changed.

As shown in FIG. 14, the thickness of the main body 1 is added to the thickness of the bulge 2, making it thicker than the thickness of the bulge 2 and bulge 3 alone.

In this way, by placing the cushion A in a shape in which the bulge 2 is bent toward the back side of the main body 1 and the bulge 3 is bent along the armrest 102 and toward the front side of the main body 1 in the driver's seat 100 of the car, the sides of the armpits and waist of the seated person can be adequately supported.

For example, by placing a cushion A of the shape shown in FIG. 14 in the driver's seat of an automobile, it is possible to firmly support both sides of the occupant's lower back and the area extending from both sides of the lower back to the rear, thereby maintaining the driver's posture when driving for long periods of time (see FIG. 15).

As a result, bulges 2 and 3 support the driver's lower back from both sides, greatly reducing the load on the lower back. Because it is difficult for a driver to move their body significantly while driving and to significantly change their posture, cushion A maintains and supports the driver's posture, which is highly effective in reducing the burden on the user.

Note that, although use in a car seat has been given as an example here, the use is not limited to this. For example, a similar cushion A arrangement structure can also be used in a chair equipped with a single armrest.

[Seventh embodiment]
The seventh embodiment of the present invention is an embodiment in which cushion A is combined with a cushion of a general shape and arranged along the back and armrests of a chair. The seventh embodiment differs from the first embodiment shown in Fig. 4 above in that cushion A is combined with a cushion of a general shape. The cushion arrangement structure of the seventh embodiment of the present invention can also be applied to the cushion arrangement structures of cushions L, G, H, I, J, K, and M and their modified examples, which will be described later.

Figure 16 shows a chair 4 having the above-mentioned backrest 40 and two armrests 41 and 42. A cushion A is placed on the chair 4, and a general-shaped cushion B is placed on top of the front surface of the main body 1 of the cushion A. The cushion B is a general-shaped backrest cushion with an approximately rectangular outer shape.

As shown in FIG. 16, by placing cushion B on the surface side of main body 1 of cushion A, the thickness of the part that contacts the rear of the waist of the seated person is thicker than the thickness of main body 1 alone. This makes the seated person's rear waist feel even better.

As shown in this seventh embodiment, cushion A can also be arranged in combination with a cushion of a general shape.

[Eighth embodiment]
The eighth embodiment of the present invention is an embodiment in which two cushions A are combined and arranged along the back and armrests of a chair. The eighth embodiment is an embodiment in which another cushion A is arranged on top of the cushion A arranged on the chair in the first embodiment shown in Fig. 4 described above. The cushion arrangement structure of the eighth embodiment of the present invention can also be applied to the cushion arrangement structures of cushions L, G, H, I, J, K, and M and their modified examples described below.

Figure 17 shows a chair 4 having the above-mentioned backrest 40 and two armrests 41 and 42. As in the first embodiment, a first cushion A1 is placed on the chair 4, and a second cushion A2 is placed by hooking the main body 1 of the cushion A2 onto the upper part of the backrest 40 and the upper edge of the main body 1 of the cushion A1.

As shown in FIG. 17, the bulge 2 of the cushion A2 is disposed on the upper side of the surface of the main body 1 of the cushion A1. In FIG. 17, the dot pattern is applied only to the cushion A2 to easily distinguish between the cushion A1 and the cushion A2.

As shown in FIG. 17, by placing cushion A2 on the surface side of main body 1 of cushion A1, both sides of the seated person's lower back are supported by bulges 2 and 3 of cushion A1, and the upper part of the seated person's back is firmly supported by bulge 2 of cushion A2.

When a person with a hunchback or round shoulders sits on the chair 4, the bulge 2 of the cushion A2 comes into contact with the upper part of the rounded back, supporting the back and improving the comfort of the sitting position.

As shown in this eighth embodiment, it is also possible to combine and arrange two cushions, A1 and A2, on a chair.

[Ninth embodiment]
The ninth embodiment of the present invention is an embodiment in which two cushions A are combined and arranged on a bed having a reclining backrest. In the ninth embodiment, a further cushion A is arranged on top of the cushion A arranged on the bed in the third embodiment shown in Fig. 10 described above, in the shape of the fifth embodiment shown in Fig. 13 described above. The cushion arrangement structure of the ninth embodiment of the present invention can also be applied as the cushion arrangement structures of cushions L, G, H, I, J, K, and M described below and their modified examples.

Figure 18 shows a bed 9 having the above-mentioned backrest 90. As in the third embodiment, a first cushion A1 is placed on the bed 9, and a second cushion A2 is placed above the main body 1 and bulge 2 of the cushion A1.

As shown in FIG. 18, the bulge 2 and bulge 3 of the cushion A2 are bent toward the surface side of the main body 1.

As shown in FIG. 18, cushion A2, in which bulges 2 and 3 are bent toward the front surface of main body 1, is placed over main body 1 and bulge 2 of cushion A1. This allows the cervical vertebrae P1 and occipital region P4 of the user to be firmly supported by bulge 2 of cushion A1 and bulge 2 and bulge 3 of cushion A2.

The arrangement of the two cushions A1 and A2 shown in Figure 18 can further stabilize the area above the user's shoulders, particularly the cervical vertebrae P1 and the back of the head P4, and maintain the user's posture.

In addition, at the position of the cervical vertebrae P1 and the back of the head P4, the bulge 2 of the cushion A1, the main body 1 of the cushion A2, and the bulge 2 or bulge 3 of the cushion A2 overlap to form a portion with a large thickness, which further improves the feeling of use when applied to the user's body.

In addition, the position of the back of the user's head P4 is raised, making it easier to raise the position of the user's line of sight, and lateral shaking of the back of the head P4 can be suppressed via the bulge 2 and bulge 3 of the cushion A2.

As shown in this ninth embodiment, it is also possible to combine and arrange two cushions, A1 and A2, on a bed that has a reclining backrest.

Next, an example of a cushion or a cushion arrangement structure to which the present invention is applied will be described.
[Tenth embodiment]
The tenth embodiment of the present invention is different from the cushion A described above in that it has a loop through which a string, belt, or the like can be passed for fixing the cushion. The structure of the cushion of the tenth embodiment of the present invention can also be applied to the structures of cushions L, G, H, I, J, K, and M, which will be described later, and their modified cushions.

In the cushion C, which is the tenth embodiment of the present invention, two loops 11 are provided on each of the upper and lower edges of the main body 1. In addition, four loops 12 are provided on the back surface of the main body 1 (see Figures 19(a) and 19(b)).

By passing a string or belt through loop portion 11 or loop portion 12 and tying the string or belt to the backrest of a chair or bed, or to the seat of the chair, it is possible to firmly secure main body portion 1 to the chair or bed. This makes it difficult for the cushion to shift from its position. It also allows for greater freedom in the positioning of the cushion.

[Eleventh embodiment]
In the eleventh embodiment of the present invention, the main body is detachable so that the length of the cushion in the longitudinal direction can be adjusted. The structure of the cushion in the eleventh embodiment of the present invention can also be applied to the structures of cushions L, G, H, I, J, K, and M and their modified examples, which will be described later.

In the cushion D, which is the eleventh embodiment of the present invention, the main body 13 is composed of two parts, a separable upper main body 130 and a lower main body 131 (see FIG. 20(a)). In addition, a hook-and-loop fastener 132 is provided on the back surface of the upper main body 130 and the front surface of the lower main body 131. Note that the hook-and-loop fastener on the back surface of the upper main body 130 is not shown in the figure.

In addition, in cushion D, a bulge 20 is formed adjacent to the left edge of the upper main body 130. In addition, a bulge 30 is formed adjacent to the right edge of the lower main body 131.

In this cushion D, the longitudinal length of the main body 13 can be adjusted to the desired length by changing the engagement position of the hook-and-loop fasteners 132 formed on the underside of the upper main body 130 and the surface of the lower main body 131. This allows the size of the cushion to be changed with even greater freedom to suit the size and shape of the chair and the part of the user's body that it is desired to apply to.

[Twelfth embodiment]
The twelfth embodiment of the present invention is an embodiment in which two cushions A are combined and arranged on a chair having a seat, a backrest, and two armrests. The cushion arrangement structure of the twelfth embodiment of the present invention can also be applied to the cushion arrangement structures of cushions L, G, H, I, J, K, and M and their modified examples, which will be described later.

As shown in Figures 21 and 22, in this embodiment, two cushions, A1 and A2, are used. Cushion A1 and cushion A2 have the same structure as cushion A described above.

In this embodiment, the main body 1 of the cushion A1 is arranged along the backrest 43, and the main body 1 of the cushion A2 is arranged along the seat surface 44 (see FIG. 22).

The bulge 2 of the cushion A2 is bent upward along the armrest 45 and toward the surface of the main body 1. The bulge 3 of the cushion A2 is bent upward along the armrest 46 and toward the surface of the main body 1.

The bulge 2 of the cushion A1 is arranged along the armrest 41 and bent toward the surface side of the main body 1. The bulge 3 of the cushion A1 is arranged along the armrest 42 and bent toward the surface side of the main body 1.

This arrangement allows the main body 1 of each of the cushions A1 and A2 to support a wide range of body parts, including the user's buttocks, lower back, and back. In addition, the left and right sides of the user's lower back can be supported via the bulges 2 and 3 of the cushion A2. The left and right sides of the user's back, and the outsides of both arms and shoulders can be supported via the bulges 2 and 3 of the cushion A1.

This embodiment is easily adopted in chairs with wide backrests and seats, and the two cushions A1 and A2 support the user's body over a wide area, allowing the user to sit comfortably in the chair.

[Thirteenth embodiment]
The thirteenth embodiment of the present invention is a cushion E having a shape shown in Fig. 23(a) and Fig. 23(b). The cushion E has a structure in which two of the above-mentioned cushions A are connected in the up-down direction of the main body. The cushion structure of the thirteenth embodiment of the present invention can also be applied to the cushion structures of the cushions L, G, H, I, J, K, and M described below, and their modified cushion structures.

As shown in FIG. 23(a), the cushion E has a main body 14. The main body 14 is composed of an upper main body 140, an upper and lower connection part 141, and a lower main body 142. The upper main body 140, the upper and lower connection part 141, and the lower main body 142 are formed only from an integrated cover member.

Bulge 21 and bulge 31 are formed adjacent to both left and right edges of upper main body 140. Bulge 22 and bulge 32 are formed adjacent to both left and right edges of lower main body 131. The four bulges are formed by placing a cushion inner material inside the cover that constitutes main body 14.

A cushion E of this shape can be placed on a chair having a seat, a backrest, and two armrests, similar to the twelfth embodiment described above. In this case, as shown in FIG. 23(b), the cushion E can be placed on the chair with the upper and lower connecting parts 141 folded at the boundary so that the lower main body part 142 is placed on the seat side and the upper main body part is placed on the backrest side.

As another aspect of this embodiment, the cushion F shown in FIG. 24 can be used. Unlike cushion E, cushion F has a thicker shape, with the upper body portion 150 and the lower body portion 152 constituting the main body portion 15 being configured with a cushion inner material placed inside the cover body.

In addition, in cushion F, the upper main body portion 150 and the lower main body portion 152 are connected by a vertical connection portion 151, which is formed only by the cover body. As in cushion F, the upper main body portion 150 and the lower main body portion 152 can also be made thicker.

[Fourteenth embodiment]
The fourteenth embodiment of the present invention is a cushion L that is inflated by using air. As shown in Figures 25(a) to 25(c), the cushion L has a main body portion 1a, a bulging portion 2a, and a bulging portion 3a.

As shown in FIG. 25(b), the main body 1a, inflated portion 2a, and inflated portion 3a of the cushion L are formed with injection ports 100a, 20a, and 30a on the back side, respectively, and air can be injected into each of them to adjust the degree of inflation and create a desired shape.

As shown in Figures 25(a) to 25(c), the main body 1a and the bulge 2a, and the main body 1a and the bulge 3a are connected by a connection 10a. This connection 10a connects the main body 1a and the bulge 2a or the bulge 3a, and also separates the respective components.

In other words, by forming each connection part 10a, injection port 100a, injection port 20a, and injection port 30a, the main body part 1a, the bulge part 2a, and the bulge part 3a can be inflated individually. In addition, the degree of expansion of each part can be made different.

The main body 1a, the bulge 2a, the bulge 3a, and each connection 10a are made of polyvinyl chloride resin. As shown in FIG. 25(c), when the main body 1a, the bulge 2a, and the bulge 3a are expanded significantly, the expansion of the bulge 2a and the bulge 3a is larger than the expansion of the main body 1a.

Four internal partitions 11a are formed in the main body 1a (see Figs. 25(a) to 25(c)). The internal partitions 11a are formed by welding sheet-like partitions (not shown) made of polyvinyl chloride resin to the top and bottom inner surfaces of the main body 1a along the short side (vertical direction) of the main body inside the main body 1a. At this time, the sheet-like partitions are arranged so that the width direction of the sheet-like partitions coincides with the thickness direction of the main body 1a. By providing these sheet-like partitions, it is possible to maintain a certain thickness even at the position of the internal partitions 11a when air is injected into the main body 1a to divide it into multiple inflated sections, as described below.

More specifically, the internal partition 11a has a gap between the upper end or the lower end of the main body 1a in the vertical direction in FIG. 25(a) inside the main body 1a. Therefore, air can pass through the gap, and even if the internal partition 11a is provided, air can be distributed throughout the entire interior of the main body 1a.

By providing these four internal partitions 11a, when the main body 1a is inflated with air, it is not one large bulge, but is divided into multiple bulging sections in the left-right direction. This shape makes it easier to fit the main body 1a around the user's waist and neck, and increases the number of areas of the main body 1a that come into contact with the body, making it possible to support parts of the body more stably.

As described above, the internal partition 11a does not completely separate the inside of the main body 1a, and by simply providing one inlet 100a for the main body 1a, air can be distributed throughout the inside of the main body 1a.

Here, it is not necessary that the main body portion 1a, the swelling portion 2a, and the swelling portion 3a can be adjusted by injecting air into the inside of each of them. For example, it is also possible to adopt a mode in which the swelling degree of the main body portion 1a, the swelling portion 2a, and the swelling portion 3a can be adjusted by injecting water instead of air into the inside of each of them. However, if air is used, the swelling degree can be easily adjusted by the simple task of letting air in and out, so it is preferable that the swelling degree of the main body portion 1a, the swelling portion 2a, and the swelling portion 3a can be adjusted by injecting air into the inside of each of them.

In addition, in the case of an embodiment in which the degree of swelling can be adjusted with water, the temperature of the water can be changed to change the sensation of use. For example, cold water can be poured into the inside of the main body portion 1a, the swelling portion 2a, and the swelling portion 3a, allowing the user to feel a cool sensation, and it can be used like a water pillow. Also, for example, warm water can be poured into the inside of the main body portion 1a, the swelling portion 2a, and the swelling portion 3a, and the user can place the cushion L on a painful area such as the lower back to relieve pain.

The main body 1a, the swelling portion 2a, the swelling portion 3a, and each connecting portion 10a do not necessarily have to be made of polyvinyl chloride resin, and any material that feels good against the skin when inflated and can be inflated by injecting air into it can be used as appropriate. For example, instead of polyvinyl chloride resin, polyester fiber that can be inflated by injecting air can be used. Also, if the inflatable item is inflated by injecting water or hot water into it, the main body 1a, the swelling portion 2a, the swelling portion 3a, and each connecting portion 10a can be made of materials such as chloroprene rubber or nylon.

As with cushion A, cushion L can be used by modifying its shape in various ways. For example, it can be in a shape where bulges 2a and 3a are folded toward main body 1a on the front side of main body 1a (see FIG. 26(a)), or where bulges 2a are folded toward the back side of main body 1a and bulges 3a are folded toward the front side of main body 1a (see FIG. 26(b)).

For example, the bulge 2a and bulge 3a can be largely folded toward the main body 1a on the surface side of the main body 1a (see FIG. 26(c)), or the bulge 3a can be rotated toward the bulge 2a while the main body 1 is wrapped around it (see FIG. 26(d)). These various shapes can be arranged in the same manner as the various arrangements of the cushion A described above.

A modified example of the 14th embodiment of the present invention will be described with reference to Figures 27(a) and 27(b). Note that the same members as those in the cushion L described above are given the same reference numerals and will not be described.

In the cushion G shown in FIG. 27(a), a bulge 2b and a bulge 3b are provided on both sides of the main body 1a. In addition, one internal partition 11b is formed in each of the bulges 2b and 3b. This internal partition 11b is formed by welding a sheet-like partition material (not shown) made of polyvinyl chloride resin to the upper and lower inner surfaces of the bulges 2b and 3b along the short side direction (vertical direction) of the main body inside the bulges 2b and 3b. At this time, the sheet-like partition material is arranged so that the width direction of the sheet-like partition material coincides with the thickness direction of the bulges 2b and 3b. By providing this sheet-like partition material, as described later, when air is injected into the bulges 2b and 3b to divide them into multiple bulge sections, a certain thickness can be provided even at the position of the internal partition 11b.

More specifically, the internal partition 11b has a gap between the upper end or lower end of the bulge 2b (bulge 3b) in the vertical direction in FIG. 27(a) inside the bulge 2b and bulge 3b. Therefore, air can pass through the gap, and even if the internal partition 11b is provided, air can be distributed throughout the entire interior of the bulge 2b or bulge 3b.

By providing this internal partition 11b, when air is injected and inflated, bulge portion 2b and bulge portion 3b do not form a single large bulge, but are divided into multiple bulge sections in the left-right direction. This shape makes it easier to fit bulge portion 2b and bulge portion 3b to the user's waist and neck, and increases the number of places where bulge portion 2b and bulge portion 3b come into contact with the body, making it possible to support parts of the body more stably.

Also, as described above, the internal partition 11b does not have a structure that completely separates the inside of the bulge 2b or bulge 3b, and it is possible to distribute air throughout the inside of the bulge 2b or bulge 3b simply by providing one injection port (not shown) for the bulge 2b or bulge 3b.

In the cushion H shown in FIG. 27(b), a bulge 2a and a bulge 3a are provided on both sides of the main body 1b. In addition, two internal partitions 11c are formed in the main body 1b (see FIG. 27(b)). These internal partitions 11c are formed by welding a sheet-like partition material (not shown) made of polyvinyl chloride resin to the upper and lower inner surfaces of the main body 1b along the longitudinal direction (left-right direction) of the main body inside the main body 1b. At this time, the sheet-like partition material is arranged so that the width direction of the sheet-like partition material coincides with the thickness direction of the main body 1b. By providing this sheet-like partition material, as described below, when air is injected into the main body 1b to divide it into multiple bulge sections, a certain thickness can be provided even at the position of the internal partitions 11c.

The main body portion 1b and the bulge portion 2a, and the main body portion 1b and the bulge portion 3a are connected by connection portion 10b.

More specifically, the internal partition 11c has a gap between the left end or right end of the main body 1b in the left-right direction in FIG. 27(b) inside the main body 1b. Therefore, air can pass through the gap, and even if the internal partition 11c is provided, air can be distributed throughout the entire interior of the main body 1b.

By providing these two internal partitions 11c, when the main body 1b is inflated with air, it is not one large bulge, but is divided into multiple bulging sections along the short side of the main body 1c. This shape makes it easier to fit the main body 1b around the user's waist and neck, and increases the number of areas of the main body 1b that come into contact with the body, making it possible to support parts of the body more stably.

As described above, the internal partition 11c does not completely separate the inside of the main body 1b, and by simply providing one inlet (not shown) to the main body 1b, air can be distributed throughout the inside of the main body 1b.

[Fifteenth embodiment]
In the fifteenth embodiment of the present invention, a further example of a structure for providing a bulge to a cushion will be described. In the cushion I shown here, the outer shape of the entire cushion is formed by a cover body 16 (see FIG. 28(a)).

The cover body 16 of this cushion I is made of cloth or synthetic leather, and has a main body 161 and a bulge 162 and a bulge 163 provided on both sides of the main body 161. The main body 161 is connected to the bulge 162 or the bulge 163 by a connection part (reference numeral omitted).

The cover body 16 also has pocket-shaped bulges 162 and 163, allowing the cushion inner material 17 made of urethane chip material and the expandable cushion material 18 to be placed inside.

The cushion filling 17 is formed by filling the inside of a bag-shaped inner cover with urethane chip material. The size of the cushion filling 17 can be changed by adjusting the amount of urethane chip material placed inside the inner cover. In the following, the cushion filling 17 refers to the cushion filling made of urethane chip material.

The expandable cushion material 18 is made of polyvinyl chloride resin and can be inflated by injecting air through an inlet (see Figures 28(a) and 28(b)). The size of the expandable cushion material 18 can be changed by adjusting the amount of air injected.

That is, in cushion I, the cushion inner material 17 and the expandable cushion material 18 are arranged inside the bulging portion 162 and the bulging portion 163 of the cover body 16, so that the bulging portion 162 and the bulging portion 163 can be greatly expanded.

For example, as shown in Figures 29(a) and 29(b), two expandable cushion materials 18 are prepared, inflated by injecting air into them, and placed inside the pocket-like structures of the bulging portions 162 and 163 of the cover body 16, so that the bulging portions 162 and 163 can be greatly inflated.

Although not shown, it is also possible to have a structure in which the cushion inner material 17 is placed in both the bulging portion 162 and the bulging portion 163, or to have the cushion inner material 17 placed in one portion and the expandable cushion material 18 placed in the other portion.

In addition, cushion I may have a structure in which multiple cushion fillings are arranged in one of bulging portions 162 (or bulging portion 163).

For example, instead of using one cushion core 17 containing 100 g of urethane chip material for bulge 162 (or bulge 163), it is also possible to use a combination of three types of cushion cores 17a (80 g), 17b (20 g), and 17c (10 g), each containing a smaller amount of urethane chip material (see FIG. 30(a)).

By combining multiple cushion inner materials 17a, etc., each containing a different amount of urethane chip material, the size and degree of expansion of the inflated portion 162 (or inflated portion 163) can be easily changed simply by inserting and removing the cushion inner materials 17a, etc. Also, the degree of expansion of the inflated portions 162 and 163 can be made different.

In this way, by changing the combination of cushion inner material 17a, cushion inner material 17b, and cushion inner material 17c and placing them in bulge portion 162 or bulge portion 163, the shape of cushion I can be easily changed to suit the user's body and posture.

In addition, instead of the expandable cushion material 18, it is also possible to provide a smaller expandable cushion material 18a and use this in combination with the cushion inner material 17a, etc. (see Figure 30 (b)).

Furthermore, a modified example of cushion I will be described. In cushion J shown in Fig. 31(a) and Fig. 31(b), the cover body has a main body portion 161a and a bulge portion 162 and a bulge portion 163 provided on both sides of the main body portion 161a. In addition, the main body portion 161a is connected to the bulge portion 162 or the bulge portion 163 by a connection portion (reference numeral omitted).

The main body portion 161a of the cushion J is formed in a pocket shape. The cushion J can be placed inside the main body portion 161a and has a main body expandable/contractable cushion material 19 that is approximately the same size as the main body portion 161a (see FIG. 31(a)).

The main body expansion/contraction cushion material 19 is made of polyvinyl chloride resin and can be inflated by injecting air through an injection port (not shown) (see FIG. 31(a)). The size of the main body expansion/contraction cushion material 19 can be changed by adjusting the amount of air injected.

This cushion J has a structure that enhances the cushioning properties of the main body portion 161a by disposing inflated main body expansion/contraction cushion material 19 not only in the bulge portion 162 and the bulge portion 163, but also inside the main body portion 161a. In addition, by changing the amount of air injected into the main body expansion/contraction cushion material 19, the degree of inflation can be adjusted, and the size and inflation of the main body portion 161a can be easily adjusted.

Here, the expandable cushion material 19 can be expanded not only by injecting air, but also by injecting water instead of air to adjust the degree of expansion.

As a modification of the cushion J, a plate-shaped urethane material 19a of approximately the same size as the main body 161a may be placed inside the main body 161a (see FIG. 31(c)).

[Sixteenth embodiment]
Next, a sixteenth embodiment of the present invention will be described. In the cushion M according to the sixteenth embodiment of the present invention, as shown in Fig. 32, the cover body has a main body 161c and a bulge 162a and a bulge 163a provided on both sides of the main body 161c. The main body 161c is connected to the bulge 162a or the bulge 163a by a connection part 10d.

The main body 161c of the cushion M is formed in a pocket shape, and is configured so that a plate-shaped urethane material (not shown) of approximately the same size as the main body 161c can be inserted and removed from its internal space. The plate-shaped urethane material can also be covered with an inner cover (not shown) and placed inside the main body 161c.

In the cushion M, the plate-shaped urethane material can be inserted and removed from the main body portion 161c, allowing the user to select a structure in which the plate-shaped urethane material is placed inside the main body portion 161c, or a structure in which it is not placed, and the cushioning properties of the main body portion 161c can be varied according to the user's preference. When using the cushion as a pillow or when using the cushion M by deforming the overall shape into a concave shape, it may be more convenient to use it without the plate-shaped urethane material, and this makes it easier to apply to such usage patterns.

In addition, a fastener 1610 is formed on the main body 161c, and by opening and closing this fastener 1610, the main body 161c can be switched between an open state in which an opening is formed to allow the urethane plate and the inner cover to be inserted and removed, and a closed state in which the opening is closed.

Here, by covering the plate-shaped urethane material with an inner cover, the operation of inserting the plate-shaped urethane material inside the main body portion 161c becomes easier. For example, in a structure where the plate-shaped urethane material is not covered with an inner cover, the surface of the plate-shaped urethane material gets caught on the inner circumference of the main body portion 161c due to the nature of the urethane material, making the operation of insertion time-consuming. Therefore, by covering the plate-shaped urethane material with an inner cover, the catch caused by the urethane material is reduced, making it easier to insert the plate-shaped urethane material inside the main body portion 161c.

In addition, by forming this fastener 1610, the urethane plate and the inner cover are inserted inside the main body 161c and then the fastener 1610 is closed, making it difficult for the inserted urethane plate to shift position and preventing the urethane plate and the inner cover from popping out of the main body 161c.

Here, the fastener 1610 does not necessarily need to be formed on the main body 161c, and a hook-and-loop fastener can be used instead of the fastener 1610. For example, when used by elderly people or the like who have difficulty opening and closing with a fastener, the hook-and-loop fastener can be used to easily switch the main body 161c between the open and closed states.

Furthermore, like the bulging portion 162 and the bulging portion 163, the bulging portion 162a and the bulging portion 163a can be greatly inflated by disposing the above-mentioned cushion inner material 17 and the expandable cushion material 18.

In addition, the bulging portion 162a and the bulging portion 163a are formed in a pocket shape, and are configured so that the cushion inner material 17 and the expandable cushion material 18 can be inserted and removed from the internal space.

Furthermore, a fastener 1620 is formed in the bulge 162a, and a fastener 1630 is formed in the bulge 163a. By opening and closing this fastener 1620, the bulge 162a can be switched between an open state in which an opening is formed to allow the cushion inner material 17 and the expandable cushion material 18 to be inserted and removed, and a closed state in which the opening is closed. The same is true for the fastener 1630 of the bulge 163a.

By forming this fastener 1620, the cushion inner material 17 or the expandable/contractible cushion material 18 can be inserted inside the bulge 162a and then closed by fastener 1620, making it difficult for the inserted position of the cushion inner material 17 or the expandable/contractible cushion material 18 to shift, and preventing the cushion inner material 17 or the expandable/contractible cushion material 18 from popping out of the bulge 162a. The same applies to the fastener 1630 of the bulge 163a.

Here, it is not necessary to form fasteners 1620 and 1630 on bulges 162a and 163a, and instead, hook-and-loop fasteners can be used. For example, when used by elderly people or others who have difficulty opening and closing with a fastener, the use of hook-and-loop fasteners makes it easier to switch between the open and closed states of bulges 162a and 163a.

In addition, two loops 12a are formed on the top and bottom of each of the two connection parts 10d. In other words, four loops 12a are formed on the entire cushion M. A string or a fixing belt can be passed through these loops 12a, and the cushion M can be fixed to the backrest or seat of a chair or the like on which the cushion M is placed via this string or fixing belt.

[Seventeenth embodiment]
In the seventeenth embodiment of the present invention, a further example of a structure in which a plurality of bulging sections are provided in the main body of the cushion will be described. In the cushion K shown here, the outer shape of the entire cushion is formed by a cover body 160 (see FIG. 33(a)).

This cover body 160 has a main body portion 161b and a bulge portion 162 and a bulge portion 163 provided on both sides of the main body portion 161b. In addition, the main body portion 161b is connected to the bulge portion 162 or the bulge portion 163 by a connection portion 10c (see FIG. 33(b)).

The main body 161b is formed double and has two partition seams 11d. With this structure, three cylindrical spaces 1600 are formed in the main body 161b.

Elongated cushion inner materials 17d can be placed in each of the three cylindrical spaces 1600 of the main body 161b (see Figs. 34(a) and 34(b)). The elongated cushion inner materials 17d are formed by filling the inside of a bag-shaped inner cover with urethane chip material.

In this cushion K, by putting a long and thin cushion inner material 17d inside each of the three cylindrical spaces 1600, the main body portion 161b can be made to have a shape that is divided into multiple bulging sections along the length of the main body portion, rather than one large bulge (see FIG. 34(b)). As a result, the main body portion 161b can be easily fitted to the user's waist and neck, and the number of places where the main body portion 161b comes into contact with the body increases, making it possible to support parts of the body more stably.

As a modification of the cushion K, instead of the elongated cushion inner material 17d, an elongated expandable cushion material 18b may be placed inside the main body 161b (see FIG. 3435(a)), or a rectangular urethane material 18c may be placed inside the main body 161b (see FIG. 35(b)). The elongated expandable cushion material 18b is a member whose degree of expansion can be adjusted by injecting water or air into it.

As described above, the cushion and cushion arrangement structure to which the present invention is applied can support and maintain the user's sitting posture or the posture of the back and head of the body, are easy to use, and can be used for a wide range of purposes, such as furniture chairs, wheelchairs, hairdressing chairs, hair washing chairs, car seats, and beds with reclining functions.

The terms and expressions used in this specification and claims are merely explanatory and are not limiting in any way, and are not intended to exclude terms and expressions equivalent to the features described in this specification and claims or parts thereof. It goes without saying that various modifications are possible within the scope of the technical concept of the present invention.

A Cushion 1 Main body 10 Anti-slip part 2 Bulging part 3 Bulging part 4 Chair 40 Backrest 41 Armrest 42 Armrest 5 Wheelchair 50 Backrest 51 Armrest 52 Armrest 6 Hair washing chair 60 Backrest 61 Armrest 62 Armrest 7 Hairdressing chair 70 Backrest 71 Seat 72 Armrest 73 Armrest 8 Chair 80 Backrest 81 Seat 9 Bed 90 Backrest 100 Seat 101 Backrest 102 Armrest A1 Cushion A2 Cushion B Cushion P1 Cervical vertebrae P2 Chin P3 Upper part of back P4 Back of head C Cushion 11 Loop part 12 Loop part D Cushion 13 Main body 130 Upper main body 131 Lower main body 132 Hook and loop fastener 20 Bulge 30 Bulge 43 Backrest 44 Seat 45 Armrest 46 Armrest E Cushion 14 Main body 140 Upper main body 141 Upper and lower connection 142 Lower main body 21 Bulge 31 Bulge 22 Bulge 32 Bulge F Cushion 150 Upper main body 151 Upper and lower connection 152 Lower main body

L Cushion 1a Main body 2a Swelling portion 3a Swelling portion 100a Inlet 20a Inlet 30a Inlet 10a Connection portion 11a Internal partition portion

G Cushion 2b Swelling portion 3b Swelling portion 11b Internal partition portion

H Cushion 11c Internal partition 10b Connection

I Cushion 16 Cover body 161 Main body 162 Expanded portion 163 Expanded portion 17 Cushion inner material 18 Expandable/contractable cushion material 17a Cushion inner material 17b Cushion inner material 17c Cushion inner material 18a Expandable/contractable cushion material

J Cushion 19 Body expansion and contraction cushion material 19a Plate-shaped urethane material

M Cushion 161a Main body 162a Swelling 163a Swell 10d Connection 1610 Fastener 1620 Fastener 1630 Fastener 12a Loop

K Cushion 160 Cover body 161b Main body 10c Connection 11d Partition seam 1600 Cylindrical space 17d Elongated cushion inner material 18b Elongated expandable/contractible cushion material 18c Strip-shaped urethane material

Claims (30)

A main body portion formed in a band shape;
a first bulge provided on one end edge of the main body in the longitudinal direction, having a thickness greater than that of the main body, a length along the longitudinal direction of the main body being equal to or less than half the length of the main body in the longitudinal direction, and capable of being bent toward the main body on either the front or back surface side of the main body;
a second bulge portion provided on the other end edge of the main body portion in the longitudinal direction, having a thickness greater than that of the main body portion, a length along the longitudinal direction of the main body portion that is less than half the longitudinal length of the main body portion, and which can be bent toward the main body portion on either the front or back side of the main body portion. The cushion of claim 1, wherein the first bulge portion and the second bulge portion are configured so that the main body portion can be wrapped around one of the bulges as a core toward the other bulge portion, and the shape of the main body portion wrapped around the core can be maintained. The cushion according to claim 1 or claim 2, wherein the longitudinal length of the main body portion is within a range of two to three times the longitudinal length of the main body portion at the first bulge portion and the second bulge portion. The first bulge portion and the second bulge portion are formed to have an elliptical shape in a cross section along the longitudinal direction of the main body portion,
3. The cushion according to claim 1, wherein the thickness of the first bulge portion and the second bulge portion is within a range of 5 to 40 times the thickness of the main body portion. The cushion according to claim 1 or claim 2, wherein the connection position between the main body portion and the first bulge portion and the connection position between the main body portion and the second bulge portion are approximately central positions in the thickness direction of the main body portion in the thickness direction of the first bulge portion and the second bulge portion. The main body is formed so as to be separable into an upper main body and a lower main body along a thickness direction,
The cushion according to claim 1 or claim 2, wherein the contact surfaces of the upper main body portion and the lower main body portion are provided with hook-and-loop fasteners that can be engaged with each other, and the length along the longitudinal direction of the main body portion can be adjusted by changing the joining position of the hook-and-loop fasteners. A first main body portion formed in a band shape;
a first bulge portion provided on one end edge side of the first main body portion in the longitudinal direction, having a thickness greater than that of the first main body portion, a length along the longitudinal direction of the first main body portion being equal to or less than half the length of the first main body portion in the longitudinal direction, and capable of being bent toward the first main body portion on either the front or back surface side of the first main body portion;
a second bulge portion provided on the other end edge side of the first main body portion in the longitudinal direction, having a thickness greater than that of the first main body portion, a length along the longitudinal direction of the first main body portion being equal to or less than half the length of the first main body portion in the longitudinal direction, and capable of being bent toward the first main body portion on either the front or back surface side of the first main body portion;
an upper and lower connection portion formed in a band shape and attached to one end edge of the first main body portion in a short side direction;
a second body portion formed in a band shape and attached to an end edge of the upper and lower connection portions opposite to one end edge of the first body portion in the short side direction;
a third bulge portion provided on one end edge side of the second main body portion in the longitudinal direction, having a thickness greater than that of the second main body portion, a length along the longitudinal direction of the second main body portion being equal to or less than half the length of the second main body portion in the longitudinal direction, and capable of being bent toward the second main body portion on either the front or back surface side of the second main body portion;
a fourth bulge portion provided on the other end edge side of the second main body portion in the longitudinal direction, having a thickness greater than that of the second main body portion, a length along the longitudinal direction of the second main body portion that is less than half the longitudinal length of the second main body portion, and which is foldable toward the second main body portion on either the front or back surface side of the second main body portion. a first connection portion that connects the main body portion and the first bulge portion and separates the main body portion from the first bulge portion;
a second connection portion that connects the main body portion and the second bulge portion and separates the main body portion from the second bulge portion;
The cushion according to claim 1 , wherein the body portion, the first inflatable portion and the second inflatable portion are each adjustable in inflatability by injecting water or air therein. The main body portion has a plurality of main body portion vertical partition portions that are parallel to a short side direction of the main body portion and are shorter than the distance of the short side direction of the main body portion, and that divide the main body portion into a plurality of bulging sections along the longitudinal direction of the main body portion,
the first bulge is formed in a direction parallel to the short side direction of the main body and shorter than the distance of the first bulge in the short side direction of the main body, and has a first partition portion that divides the first bulge into a plurality of bulge sections along the longitudinal direction of the main body;
The cushion of claim 8, wherein the second bulge portion is formed in a direction parallel to the short side direction of the main body portion and shorter than the distance of the second bulge portion in the short side direction of the main body portion, and has a second partition portion along the longitudinal direction of the main body portion that divides the second bulge portion into a plurality of bulge compartments. The cushion according to claim 8, wherein the main body portion has a plurality of main body portion horizontal partition portions formed in a direction parallel to the longitudinal direction of the main body portion and shorter than the longitudinal distance of the main body portion, and which divide the main body portion into a plurality of bulging compartments along the short side direction of the main body portion. a first connection portion that connects the main body portion and the first bulge portion and separates the main body portion from the first bulge portion;
a second connection portion that connects the main body portion and the second bulge portion and separates the main body portion from the second bulge portion;
The main body is constituted by a main body cover, which is a cover body,
2. The cushion according to claim 1, wherein at least one of the first inflatable portion and the second inflatable portion is composed of an inflatable portion cover body which is a cover body, and at least one of a cushion inner material consisting of a plurality of chip-shaped members arranged inside the inflatable portion cover body, and an expandable cushion material filled with water or air. The cushion described in claim 11, wherein at least one of the first bulge portion and the second bulge portion has the cushion inner material disposed inside the bulge portion cover body, and the cushion inner material is formed by combining multiple inner materials having different amounts of the chip-shaped material. The cushion according to claim 11 or 12, wherein at least one of the first swelling portion and the second swelling portion has the cushion inner material and the expandable/contractable cushion material disposed inside the swelling portion cover body. The cushion according to claim 11 , wherein the expandable/contractable cushion material is disposed inside the expandable portion cover body of each of the first and second bulging portions. The cushion according to claim 11 or 14, wherein the main body portion is composed of the main body cover body, a main body expandable cushion material arranged inside the main body cover body, having the same size as the main body cover body, and filled with water or air. The cushion according to claim 11 or claim 14, wherein the main body portion is composed of at least one of the body cover body and a cushion inner material made of a plurality of chip-shaped members and a plurality of main body partition expansion/contraction cushion materials filled with water or air, the cushion inner material being arranged inside the body cover body in a direction parallel to the short side direction of the main body portion and dividing the main body portion into a plurality of inflatable compartments along the longitudinal direction of the main body portion. The cushion according to claim 11 , wherein the first bulge portion and the second bulge portion each have the cushion inner material disposed inside the bulge portion cover body. The cushion according to claim 11 or 17, wherein the main body portion is made of the main body cover body and a plate-shaped urethane material arranged inside the main body cover body and having a size equivalent to that of the main body cover body. the main body portion is made of a plate-shaped urethane material having the same size as the main body cover body and is arranged inside the main body cover body so as to be removable,
The urethane material is covered with an inner cover that can be disposed inside the main body cover and that can accommodate the urethane material therein;
a body cover opening/closing section is formed in the body cover body, which can switch the state of the body cover body between an open state in which an opening is formed to allow the urethane material and the inner cover to be inserted and removed, and a closed state in which the opening is closed;
The bulge cover body is provided with a bulge cover opening/closing section that allows the state of the bulge cover body to be freely switched between an open state in which an opening is formed to allow the cushion inner material or the expandable/contractable cushion material to be inserted or removed, and a closed state in which the opening is closed;
The cushion according to claim 11, wherein a plurality of loops through which a string or belt can be inserted are formed in at least one of the main body portion, the first bulge portion, the second bulge portion, the first connecting portion, or the second connecting portion. The cushion according to claim 11 or claim 17, wherein the main body portion is composed of the main body cover body and a plurality of rectangular urethane material strips arranged inside the main body cover body in a direction parallel to the short side of the main body portion and dividing the main body portion into a plurality of bulging sections along the longitudinal direction of the main body portion. A cushion arrangement structure in which the cushion according to any one of claims 1, 8 and 11 is arranged on a chair having a seat, a backrest, and armrests on the outside of both ends of the seat,
A cushion arrangement structure in which the cushion is arranged so that one surface of the main body portion is located on the backrest, the first bulge portion is located along the extending direction of one side of the armrest and folded toward the other surface of the main body portion, and the second bulge portion is located along the extending direction of the other side of the armrest and folded toward the other surface of the main body portion. A cushion arrangement structure in which a second cushion is arranged on top of the first cushion arranged on the backrest,
22. The cushion arrangement structure of claim 21, wherein the main body of the second cushion is hooked onto the upper part of the backrest and the upper edge of the main body of the first cushion, and the second cushion is arranged so that one of the first bulge or the second bulge of the second cushion is located on the user-facing surface of the main body of the first cushion. A cushion arrangement structure in which the cushion according to any one of claims 1, 8 and 11 is arranged on a chair having a seat, a backrest, and armrests on the outside of both ends of the seat,
A cushion arrangement structure in which the cushion is arranged so that one surface of the main body is located on the seat surface, the first bulge is located along the vertical direction of one side of the armrest and folded toward the other surface of the main body, and the second bulge is located along the vertical direction of the other side of the armrest and folded toward the other surface of the main body. A cushion arrangement structure in which the cushion according to any one of claims 1, 8 and 11 is arranged on a seat of an automobile having a seat surface, a backrest and an armrest arranged on an inner side of a vehicle interior,
The cushion is arranged on the backrest so that the first bulge is located on one side of the main body and the first bulge is folded toward the one side of the main body, and the second bulge is located along the extending direction of the armrest and toward the other side of the main body. A cushion arrangement structure in which the cushion according to claim 1, claim 8 or claim 11 is arranged on a chair having a seat surface and a backrest or a bed having a reclining backrest,
A cushion arrangement structure, in which the main body is hooked onto an upper portion of the backrest, and the cushion is arranged so that one of the first bulge portion and the second bulge portion is located on a surface of the backrest facing the user. A cushion arrangement structure for arranging the cushion according to claim 1, claim 8 or claim 11 in a bed having a reclining backrest,
A cushion arrangement structure in which the main body is wrapped around one of the first bulge portion and the second bulge portion as a core toward the other bulge portion, and the cushion is arranged along the backrest with the other bulge portion positioned lower than the one bulge portion. A cushion arrangement structure in which the cushion according to any one of claims 1, 8 and 11 is arranged on a chair having a seat surface and a backrest or a bed having a reclining backrest,
A cushion arrangement structure in which one surface of the main body portion is positioned on the backrest, and the cushion is arranged with the first bulge portion and the second bulge portion folded toward the other surface of the main body portion. A cushion arrangement structure in which two cushions according to any one of claims 1, 8 and 11 are arranged on a chair having a seat surface and a backrest or a bed having a reclining backrest,
The first cushion is a first cushion.
The main body of the first cushion is hooked onto an upper portion of the backrest, and the first cushion is arranged such that one of the first bulge and the second bulge of the first cushion is positioned on a surface of the backrest facing the user,
The second cushion is a second cushion.
A cushion arrangement structure in which the second cushion is arranged in a state in which the main body portion of the second cushion is arranged to overlap a portion of the main body portion of the first cushion and one of the bulges of the first cushion, and the first bulge portion and the second bulge portion of the second cushion are folded toward the side of the main body portion of the second cushion opposite to the side facing the first cushion. A cushion arrangement structure in which two cushions according to any one of claims 1, 8 and 11 are arranged on a chair having a seat, a backrest and armrests on the outside of both ends of the seat,
The first cushion is a first cushion.
one surface of the main body of the first cushion is positioned on the seat surface, the first bulge of the first cushion is bent along the vertical direction of one side of the armrest and toward the other surface of the main body of the first cushion, and the second bulge of the first cushion is bent along the vertical direction of the other side of the armrest and toward the other surface of the main body of the first cushion,
The second cushion is a second cushion.
A cushion arrangement structure in which one surface of the main body portion of the second cushion is located on the backrest above the first cushion, the first bulge portion of the second cushion is located along the extension direction of one side of the armrest and folded toward the other surface side of the main body portion of the second cushion, and the second bulge portion of the second cushion is located along the extension direction of the other side of the armrest and folded toward the other surface side of the main body portion of the second cushion. A cushion arrangement structure in which the cushion according to claim 7 is arranged on a chair having a seat, a backrest, and armrests on the outside of both ends of the seat,
One surface of the first main body portion and the upper and lower connection portions are disposed along the backrest, and one surface of the second main body portion is disposed on the seat surface,
The third bulge is bent along the vertical direction on one side of the armrest and toward the other surface side of the second main body, and the fourth bulge is bent along the vertical direction on the other side of the armrest and toward the other surface side of the second main body,
A cushion arrangement structure in which the first bulge is positioned along the extending direction of one side of the armrest and folded toward the other side of the first main body, and the second bulge is positioned along the extending direction of the other side of the armrest and folded toward the other side of the first main body.

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