WO2001064080A1 - Locking device of chair - Google Patents
Locking device of chair Download PDFInfo
- Publication number
- WO2001064080A1 WO2001064080A1 PCT/JP2001/001522 JP0101522W WO0164080A1 WO 2001064080 A1 WO2001064080 A1 WO 2001064080A1 JP 0101522 W JP0101522 W JP 0101522W WO 0164080 A1 WO0164080 A1 WO 0164080A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seat
- backrest
- chair
- locking device
- receiving member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
- A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
- A47C1/03283—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with fluid springs
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Supports for the head or the back
- A47C7/40—Supports for the head or the back for the back
- A47C7/405—Supports for the head or the back for the back with double backrests
Definitions
- the present invention relates to a chair rocking (tilting) device. More specifically, the present invention relates to an improvement in a locking mechanism that enables a posture to be changed by changing a tilt of a backrest and a seat.
- the center of the rotational movement of the backrest or the seat means that the node forming a part of the backrest or the seat rotates from the position of the upright posture or the reclining posture to the position of the reclining posture or the upright posture. It means the center of exercise.
- a chair locking device a structure in which a backrest is tilted rearward around a rotation shaft provided on a seat receiving member is generally used.
- a back support rod for supporting a backrest is pivotally connected to a seat receiving member fixed to a pillar and supporting a seat with a single rotation shaft, and the back support rod is connected to the back support rod.
- a reaction force applying mechanism for applying a force for returning the backrest to the initial position is provided between the backrest and the seat receiving member. When the seated person leans against the backrest, the backrest receives the reaction force of the reaction force applying mechanism. It is provided so as to tilt backward.
- Some conventional locking devices change not only the backrest but also the inclination of the seat at the same time.
- the front end of the seat is supported by a rotating shaft provided to be movable in the front-rear direction with respect to the seat receiving member, and the rear end side of the seat swings up and down around the rotating shaft.
- the tilt of the seat is changed, and the rearward movement of the seat is allowed by the front-rear movement of the rotary shaft at the front end.
- the backrest is attached to the seat receiving member so as to be swingable about the rotation shaft by one rotation shaft, and is connected so as to interlock with the seat.
- the seat back is tilted rearward, and at the same time, the seat is pulled backward and the rear end side sinks.
- the chair is not shown and only the posture of the occupant is shown.
- sign 106 is a desk
- 107 is a seated person (body)
- 108 is a display
- 109 is a keyboard.
- the body 107 since the body 107 also moves backward at the same time as the backrest leans backward, the reclining posture (in which the backrest is inclined) is greatly inclined. If you take a posture with your body down, the body 107 will be separated from the desk 106 in front of you. For this reason, when working on a desk, for example, performing computer work, changing from an upright posture (a state in which the backrest is upright) to a reclining posture, the display 1 on the desk 106 becomes inoperable. There is a problem that the distance between the body and the body such as 08 or the keyboard 109 widens, and the distance to the viewpoint and the working point (hand position) fluctuate.
- the backrest tilts backward, sufficient space must be provided behind the chair, and in order to utilize the locking mechanism, consideration must be given to placement in large office spaces and desks.
- consideration must be given to placement in large office spaces and desks.
- theater chairs it is desirable to use space as much as possible to increase the number of chairs and increase the number of spectators.
- the seat is also retracted to the depth side.
- an object of the present invention is to provide a mouth-locking device for a chair that can be turned upside down and a comfortable posture without leaving the body. Also, the space behind the backrest is reduced. It is an object of the present invention to provide a mouth-locking device for a chair that can perform a rocking operation even when it is downsized.
- the invention described in claim 1 is a mechanism for swingably supporting the backrest and the seat, and a reaction force applying device for applying a reaction force for returning the backrest and the seat to the initial position.
- the seat and backrest are attached to the seat receiving member through the backrest and the backrest and the seat are interlocked so that the posture can be changed.
- the center of the tilting rotational movement is set above the seat and forward of the backrest, so that the backrest and the seat move forward while sinking at the same time.
- the backrest moves backward from its lower end and sinks backward as it sinks, and at the same time, rotates so that the seat moves forward while sinking, changing its inclination and posture.
- the backrest moves forward together with the seat without protruding rearward, and the inclination and posture of the backrest and the seat are changed to the reclining posture so that the distance between the body and the desk does not increase.
- the troublesome movement of moving the chair forward is unnecessary.
- the seat moves forward, it lowers the seat surface and tilts so that it slides beneath the desk, so that the knees of the occupant do not hit the top of the desk or the back of the drawer. Can be performed smoothly.
- the backward tilt of the backrest draws a locus that sinks while moving forward, and does not swell greatly behind the back, making it possible for the mouth to move in a small space. For example, there is no need to block passages and make it difficult to pass.
- the seat and the backrest move forward, respectively, at the same time as the backrest tilts to reduce the movement of the center of gravity, so that the diameter of the leg (length of the leg blade) does not need to be increased. Can maintain the stability of the chair.
- the seat sinks into the entire body during the reclining posture and comes out forward, the lifting of the front edge of the seat is suppressed, and the pressure on the back of the thigh is reduced.
- the invention described in claim 2 is a lock of a chair described in claim 1.
- the invention according to claim 3 is characterized in that, in the locking device for a chair according to claim 1, the center of the rotational movement is provided at or near a position where it is not desired to move by the rocking operation. ing. In this case, the backrest and the seat rotate around the position where the rocking motion does not want to be moved or in the vicinity thereof. The change in distance to the vicinity can be reduced. Therefore, even if the work is changed from the apple posture to the reclining posture, the distance from the position where the user does not want to move or the vicinity thereof does not increase.
- the center of the rotational movement is provided at or near a work point when the occupant works. ing.
- the working posture mainly based on the applicator posture and the working posture based on the reclining posture are different.
- the change in the distance to the vicinity thereof is suppressed to a small extent. Therefore, even if the work is changed from the upright posture to the reclining posture, the distance to the viewpoint does not change significantly, and the work point shifts by turning the wrist or shoulder, that is, the hand leaves the work place. Can be prevented.
- the invention as set forth in claim 5 is the locking device for a chair according to claim 1, wherein the mechanism for supporting the backrest and the seat so as to be capable of swinging the backrest and the seat is one of the joints. And a joint facing the backrest and a joint facing the seat are fixed joints. In this case, the backrest and the seat tilt around the opposing joints according to the movement determined by the respective four-joint rotation mechanism. You. Therefore, the center of the rotational movement of the backrest and the seat can be freely set by changing the length and position of the fixed node, that is, by setting the connection position with respect to the seat receiving member.
- the invention according to claim 6 is the chair mouth-locking device according to claim 5, wherein the backrest and the seat are rotatably connected to each other, and one end is connected to the seat receiving member.
- a third link connected to the seat receiving member and supporting the seat at the other end as a swing center, and the backrest and the seat are swingably suspended from the seat receiving member by the first to third links, respectively. I try to lower it.
- the first link is a dual-purpose link constituting both the four-bar turning mechanism for tilting the backrest and the four-bar turning mechanism for tilting the seat, and the number of links can be reduced accordingly.
- the swing amount can be changed without changing the mechanism just by changing the length of the link.
- a reaction force applying device is installed between any one of the first to third links and the seat receiving member in the chair locking device according to claim 6.
- the reaction force imparting device can be easily assembled.
- the invention according to claim 8 is the locking device for a chair according to claim 1, wherein the backrest and the seat are formed as one joint having an open angle and the backrest portion and the seat are fixed.
- a first slider mechanism provided between the seat portion and the seat receiving member, the first slider mechanism being provided between the seat portion and the seat receiving member to support the backrest portion at one point and to guide the back and forth movement in the vertical direction.
- a second slider mechanism that supports the seat portion at one point and guides the movement in the front-rear direction and the vertical direction, and a seat receiving member slidably movable between the backrest and the seat by the first and second slider mechanisms.
- the backrest and the seat which form one joint, are lowered while moving the lower end side of the backrest portion forward without changing the opening angle thereof. It leans backward as it sinks into the sea, and at the same time moves forward while sinking.
- the tilt of the backrest and the seat is not changed by the rotation about the rotation axis of each slider as a permanent center, but the center of the rotational movement set above the seat and forward of the backrest.
- the backrest and the seat both move forward and sink by the rotational movement around the center, enabling the tilting in the minimum space.
- the backrest and the seat are rotated relative to each other at a lower end side of the backrest and a rear end side of the backrest.
- a first slider mechanism provided between the backrest and the seat receiving member for supporting the backrest at a single point and guiding movement in the vertical direction and the front-back direction;
- a second slider mechanism provided between the backrest and the seat and supporting the seat at one point to guide movement in the front-rear direction and the up-down direction;
- a third slider mechanism that is provided to support the connection point and simultaneously guide in a vertical direction and a front-back direction, and simultaneously moves the backrest backward and downward while moving the seatback together with the seat, and The angle between the backrest and the seat is determined.
- the backrest is lowered while moving the lower end side forward, sinks backward as it sinks, and also moves forward while sinking the seat.
- the angle between the seat and the seat also increases.
- the backrest and the seat can be tilted in a minimum space by the rotational movement that moves forward while sinking.
- the function of the third slider mechanism allows the backrest and the seat to move forward while sinking, and at the same time, the opening angle of the backrest and the seat to be widened, so that the angle between the backrest and the seat opens in the reclining posture, In the upright position, the angle between the backrest and the seat is set so that it is suitable for work.
- the descending amount of the seat is set to be smaller on the front end side than on the rear end side.
- the upper end of the seat is lifted relatively higher than the rear end side, and the body of the seated person is moved backward, so that a sense of stability in the reclining posture can be increased.
- the invention according to claim 11 is the locking device for a chair according to claim 1, wherein the mechanism for supporting the backrest and the seat so as to be able to swing respectively includes the backrest and the seat. It is composed of a four-bar rotating mechanism that includes one of the nodes, and the node facing the seat is a fixed node, the node facing the backrest is a seat, and further, a backrest that connects the backrest and the seat. Connecting at least one of the support links to the seat and seat receiving member At least one of the seat support links is slidably connected within a certain range so that the backrest and the seat can be linked to each other; a means for applying a reaction force to the backrest; And a reaction force applying device for applying a reaction force to return to the position.
- the backrest and the seat tilt according to the movement determined by the four-bar rotation mechanism. I do. Therefore, the movement of the backrest assists the movement of the backrest and the seat to move forward while sinking at the same time, so that it is easy to change from the upright posture to the reclining posture. In addition, the degree of freedom of the backrest is increased, and the feeling of leaning is improved.
- the invention according to claim 12 is the locking device according to claim 11, wherein the backrest reaction applying means is interposed between the slide connecting means and the backrest support link. It is composed of a spring for assisting rotation that applies a force for separating the support link. In this case, the backrest becomes easy to move due to the expansion and contraction of the spring, so that the rotational movement of the backrest and the seat can be started with a small resistance, and the force stored in the spring always returns to restore the backrest. Be inspired.
- the invention according to claim 13 is the chair mouth-locking device according to claim 11, wherein the slide connecting means protrudes in a direction of rotating the seat support link toward the reclining posture.
- the slide connecting means protrudes in a direction of rotating the seat support link toward the reclining posture.
- at least one end of the backrest support link is extended to the end of the bell crank and arranged side by side, and the distance between the bell crank and the backrest support link is reduced. It is connected so as to be slidable within a certain range, and a spring for assisting rotation is interposed between the bell 'crank and the backrest support link.
- this force causes the backrest to tilt and the spring to be compressed, and is converted into a force to pull the seat forward with the bell crank.
- the invention according to claim 14 is the mouth-locking device for a chair according to claim 13, wherein the rotation assisting spring is provided with a backrest supporting link and a seat-supporting link, and a tip of a crank. Is arranged at the position that has the closest relationship when in the reclining posture. In this case, the spring is in the most compressed state during the reclining posture, and the force for returning the backrest to the original position is obtained. Can be used to the fullest.
- the invention according to claim 15 is the chair mouth-locking device according to claim 13, wherein at least one of the seat support links is a Z-shaped link and protrudes in opposite directions at both ends thereof.
- a bell-crank provided with a lever portion is formed, while one bell-crank is provided with a reaction force imparting device, and the opposite bell-crank is provided with a rotation assist spring.
- the invention according to claim 16 is the seating / closing device for a chair according to claim 15, wherein the mounting position of the reaction force applying device to the bell crank is adjustable, and the seat support link is provided. The moment applied to the can be changed. In this case, even with the same reaction force applying device, the magnitude of the reaction force applied to the seat can be adjusted only by changing the mounting position.
- the chair is a theater chair, and the chair is provided with the locking device according to any one of claims 1 to 16.
- the backrest when not sitting, the backrest is raised and the seat is retracted in the depth direction, so that there is sufficient space between the chairs in the front and rear rows, and the backrest falls down when seated. It moves forward without sinking with the seat almost vertically, so that the backrest can be tilted without coming out backwards, and a comfortable posture that is easy to get tired even when sitting for a long time can be taken.
- the aisle space before and after the chair when not sitting can be secured, and a layout with more seats is possible, making it possible to more effectively utilize the audience space in theaters and the like.
- pulling the hips will pull the seat in the depth direction and raise the backrest to create a space in front of the seat, so that it is not necessary to stand from the seat.
- FIG. 1 is a schematic diagram showing an embodiment of a chair locking device according to the present invention.
- FIG. 2 is a view showing the reclining state of the mouthpiece.
- FIG. 3 is a model diagram showing movements of a backrest, a seat and each link in the mouth-locking device of FIG. 1 in a simplified manner.
- FIG. 4 is a diagram showing a change in the posture of the seated person by the locking device of the present embodiment.
- FIG. 5 is a schematic mechanism diagram showing a second embodiment of the splicer according to the present invention. It is.
- FIG. 6 is a schematic view showing a third embodiment of the locking device of the present invention in an upright posture.
- FIG. 7 is a view showing the reclining state of the mouthpiece.
- FIG. 1 is a schematic diagram showing an embodiment of a chair locking device according to the present invention.
- FIG. 2 is a view showing the reclining state of the mouthpiece.
- FIG. 3 is a model diagram showing movements of a backrest,
- FIG. 8 is a schematic diagram showing a change of the locking device from the upright posture to the reclining posture.
- FIG. 9 is a perspective view of the upright posture of the locking device as viewed from the bottom.
- FIG. 10 is a perspective view of the reclining posture of the locking device as viewed from the bottom.
- FIG. 11 is a perspective view of an upright posture of the locking device as viewed from the back.
- FIG. 12 is a schematic mechanism diagram of the locking device.
- FIG. 13 is a diagram showing an example of a change in the posture of a seated person by a conventional locking device.
- FIG. 14 is a diagram showing another example of a change in the posture of a seated person by a conventional mouth-locking device.
- FIG. 1 to 4 show an embodiment of a chair locking device according to the present invention.
- the locking device includes a backrest 2 that can be tilted in the front-rear direction, a seat 3 that can be tilted on a seat receiving member 10 in conjunction with the backrest 2, and a backrest 2 that returns the backrest 2 and the seat 3 to an initial position.
- the device is provided with a reaction force applying device 4 for applying force, and can be changed from an upright posture suitable for office work and the like to a reclining posture in which the backrest can be greatly inclined to take a comfortable posture.
- the backrest 2 and the seat 3 mainly indicate a rigid member serving as a skeleton of a structure. Specifically, the backrest 2 and the seat 3 support the back. Means a seat plate.
- fixing in an arbitrary locking position is performed by using a gas spring with a lock mechanism as the reaction force applying device 4, or by using a lock mechanism such as a multi-plate clutch plate separately from the reaction force applying device 4. It is performed by being used.
- exercise center C B , C large from chair 1 A position above the seat 3 and in front of the backrest 2 within a range that is not far away, preferably a position closer to the front of the seat 3 and above the seat 3, and more preferably a position that the occupant does not want to move in the working posture, for example,
- the work point is set at or near the work point.
- the centers C S and C B of the rotational movements of the backrest 2 and the seat 3 are set at or near positions where they do not want to move as shown in FIG. 4, for example, in the office chair 1, at least one of the rotational movements If the center C s or CB is set near the hand or arm on the desk when the occupant works, do not change the position of the work point, for example, the hand on the keyboard 109 as shown in Figure 4. Can be locked.
- the working posture is mainly an upright posture, but is not particularly limited to this, and the working posture is taken as needed.
- a four-bar turn including the backrest 2, the seat 3, and the seat receiving member 10 as a part of the joint is used.
- a rolling mechanism can be used.
- the four-bar rotating mechanism incorporates two mechanisms, one supporting the backrest 2 and the other supporting the seat 3.
- the four-bar rotating mechanism that allows the backrest 2 to be tilted includes a part of the backrest 2, for example, a portion near the lower end and a link (consisting of a seat receiving member 10) 8, a first link 5, It consists of the second link 6.
- the four-joint rotation mechanism that enables the seat 3 to be tilted includes a portion of the seat 3, for example, a portion near the rear end and a link facing the portion (configured by the seat receiving member 10) 9, a second link 6 And the third link 7. Then, the link 8 facing the backrest 2 and the link 9 facing the seat 3 are seated so as to be arranged above the seat 3 and forward of the backrest 2, respectively.
- a member 10 and connecting pins 16, 17, 18 are provided, and the backrest 2 and the seat 3 are supported by the seat receiving member 10 so as to be suspended.
- a joint 9 formed by the seat receiving member 10 and facing the seat 3 and a joint 8 opposed to the backrest 2 are formed at both ends thereof with connecting pins 16, 17 and 18 to form rotating pairs.
- Links 5 and 6 and 5 and 7 that constitute the articulating mechanism are connected.
- the first, second and third links 5, 6, 7 are rotatably connected to the backrest 2 and the seat 3 by connecting pins 11, 12, 13, respectively.
- the centers C B and C s of the respective rotational movements of the backrest and the seat receiving member are set above the seat 3 and forward of the backrest 2.
- the four-bar rotating mechanism is not limited to connecting the portion of the backrest 2 near the lower end and the portion of the seat 3 near the rear end as a part of the joint. May be connected.
- the centers CB, Cs of the rotational movement of the backrest 2 and the seat 3 are the centers of the rotational movements when moving between the upright posture and the reclining posture, which are to be set, respectively. It is the intersection of the vertical bisectors of the movement trajectories of the bins 11, 12 and 11, 13 at both ends of the portion (section) connected to the links 5, 6, 7 of the backrest 2 and seat 3.
- the first to third links 5, 6, 7 with respect to the fixed joints 8, 9 are the rotatable connection points at both ends of the fixed links 8, 9. It swings around 6, 17 and 16 and 18.
- the position at which the links 5, 6, and 7 are attached to the seat receiving member 10 is determined by determining the positions at which the backrest 2 and the seat 3 can take the desired upright and reclining positions. And the center of rotation C B , Cs of the seat 3 can be set.
- the mechanism for swingably supporting the seat 3 on the seat receiving member 10 is set so that the descending amount on the front end side is smaller than that on the rear end side of the seat 3, and the seat 3 is set at the time of reclining.
- the upper end of 3 is lifted relatively higher than the rear end side to move the seated person's body backward to obtain a sense of stability.
- the present invention is not limited to such a configuration, and the amount of drop may be equal between the front end side and the rear end side of the seat 3, or conversely, the rear end side may be lifted relatively more than the front end side. Needless to say, it can be set as needed.
- the fixed links 8, 9 are constituted by, for example, L-shaped seat receiving members 10 attached to the pillars 15 and protruding above the seat 3. Since the seat receiving member 10 is provided on both sides of the chair 1 higher than the seating surface as shown in FIGS. 1 and 2, the seat receiving member 10 can also be used as, for example, an armrest.
- the backrest 2 and the seat 3 are pin-connected at the connection point 11, and the connection point bin 11 is supported by the first link 5.
- the first link 5 can be used as both a four-bar rotating mechanism for tilting the backrest 2 and a four-bar rotating mechanism for tilting the seat 3, so that the number of parts can be reduced.
- the center of rotation C B of the rotational movement of the backrest 2 and the seat receiving member 10 and the center C s of the rotational movement of the seat 3 and the seat receiving member 10 have a small radius of curvature. However, they are on one common extension. For this reason, it is considered that the mechanism approximates that the backrest 2 and the seat 3 rotate about one virtual rotation axis that exists at a distance on the extension of the first link 5.
- the position of the fixing pins 16, 17, 18 of the seat receiving member 10, which serves as a fixing node, is not particularly limited to the case where it is arranged above the seat 3 as shown in FIG. May be located below seat 3. In this case, the seat receiving member 10 can be reduced in size and can be designed easily.
- the reaction force applying device 4 is provided between the first link 5 and the seat receiving member 10.
- the reaction force applying device 4 is not shown in detail, for example, a gas spring with a lock mechanism, a device including a compression coil spring and a shaft for guiding the same, or the like can be used.
- the reaction force imparting device 4 is compressed and exerts a strong reaction force as the chair 1 deforms from the initial position shown in FIG. 1 to the reclining position shown in FIG. A force for returning the backrest 2 and the seat 3 to the initial position is applied.
- the rocking operation is performed with the vicinity of the working hand or arm as the center of the rotational movement. For this reason, when changing the posture from the applied posture to the reclining posture, the body moves forward while sinking, so that the body does not leave the desk even in the reclining posture. Therefore, it is also necessary to bring chair 1 forward (close to desk 106). Neither is necessary, the distance to the display 108 does not increase before and after the locking operation, and the position of the hand does not deviate from the work point, for example, the keyboard 109.
- the amount of descent of the seat 3 during the rocking operation depends on the link length of the second link 6 and the third link 7, the position of the swing fulcrum, and the like, but the sitting reference point (the center point when sitting) ) Can be reduced by more than 100 mm. Therefore, when moving to the reclining posture, the seated person's knee does not hit the back of the top plate of the desk 106 or the back of the drawer.
- FIG. 5 shows a second embodiment.
- the locking device of this embodiment is such that a mechanism for swingably supporting the backrest 2 and the seat 3 does not appear above the seat 3.
- the locking device includes a connecting point (pin) that connects the backrest 2, the seat receiving member 20, and the seat 3, the seat receiving member 20, and the lower end of the back rest 2 and the rear end of the seat 3 to be rotatable with each other.
- a connecting point pin
- the first to third three slider mechanisms 21, 22, 23 formed between the seat receiving member 20 and each of the seat receiving members 20, above the seat 3 and ahead of the backrest 2.
- the seat receiving member 20 has a shape following the movement locus of the lower end portion of the backrest 2 (the shape of the long hole 23a of the third slider mechanism 23), and has a bow shape which is curved downward in its entirety. Has formed.
- the long hole 21a of the first slider mechanism 21 is formed in a straight line, and the long hole 22a of the second slider mechanism 22 is formed in a very slightly curved substantially linear shape.
- the amount of descent (fluctuation in height) of the seat 3 is small, and the backrest 2 is inclined so that the seat 3 moves forward and sinks toward the rear end.
- the first slider mechanism 21 includes a portion near the upper end of the backrest 2 and a seat receiving member.
- the backrest 2 is provided between the front and back sides 20 to guide the backrest 2 at one point and to move in the vertical direction and the front-back direction.
- the slider mechanism 21 includes an elongated hole (or elongated groove) 21 a provided at a position near the upper end of the backrest 2 and a seat member 20 fitted into the elongated hole 21 a.
- the second slider mechanism 22 includes a long hole (or a long groove) 22 a formed in a portion near the front end of the seat 3 and a front end of the seat receiving member 20 fitted into the long hole 22 a.
- the seat 3 is supported at one point of the bin 22b so as to be movable in the front-rear direction and the vertical direction.
- the third slider mechanism 23 includes a connecting portion where the lower end of the backrest 2 and the rear end of the seat 3 are rotatably connected, that is, in the case of the present embodiment, the pin 23 a and the seat receiving member 20. It is composed of a long hole (or long groove) 23a provided in the inclined portion 20b on the rear side.
- the connecting pin 23 a is guided by the curved elongated hole 23 a and simultaneously applies vertical and longitudinal displacements to the lower end of the backrest 2 and the rear end of the seat 3, thereby tilting the backrest 2 and the seat 3.
- the opening angle is set to be wider in the reclining position than in the upright position, but is not particularly limited to this.
- FIGS. 6 to 12 show a third embodiment.
- the seat 3 is suspended by two links with one fixed joint at one end and the rotating pair at both ends as a permanent center, and the backrest 2 is swingably attached to the seat 3. by interlocking the two, the center CB of the rotary movement when the backrest 2 and the seat 3 is tilted from the up-line winding position to the reclining position, C s upward at and backrest 2 by remote forward than the seat 3 It is something to set.
- the centers of rotation C s and CB of the rotational movement here are the perpendicular bisecting of each movement trajectory when the link part forming the rotational chain of the backrest 2 and the seat 3 moves from the abright position to the reclining position.
- the backrest 2 and the seat 3 are shown in a relatively detailed configuration, and not only the rigid body (the back support rod and the seat plate) constituting the locking mechanism but also the cushion body 24, 45 is also shown, but for convenience of explanation, the back support is described as the backrest 2 and the seat plate is described as the seat 3.
- a mechanism for supporting the backrest 2 and the seat 3 so as to be able to swing respectively is constituted by a four-bar rotating mechanism including the backrest 2 and the seat 3 as one of the nodes.
- the joint facing the seat 3 is a fixed joint constituted by the seat receiving member 10, and the joint facing the backrest 2 is the seat 3.
- the four-joint rotating mechanism for swingably supporting the seat 3 includes a seat 3, a seat receiving member 10, and a first seat support link for suspending and supporting the seat 3 with respect to the seat receiving member 10. 5 and a second seat support link 7.
- the first and second seat support links 5, 7 are rotatably mounted on the seat 3 by the bins 33, 28, and are rotatable on the seat receiving member 10 by the pins 16, 17. It is supported by.
- the four-bar rotating mechanism for swingably supporting the backrest 2 includes a backrest (back support rod) 2, a seat 3, a first backrest support link 2 connecting the seat 3 and the backrest 2. 5 and a second backrest support link 26.
- the first and second backrest support links 25, 26 are swingably connected to the backrest 2 and the seat 3 by pins 34, 35, 36, 37, respectively.
- a reaction force imparting device 4 for imparting a returning reaction force is provided.
- a gas spring with a lock mechanism as the reaction force applying device 4 is attached between the reaction force adjusting portion 27 of the second seat support link 7 and the lower portion of the seat receiving member 10.
- a part of a link constituting a four-bar rotating mechanism that supports the seat 3 so as to be swingable and a part of a link that configures a four-bar rotating mechanism that supports the backrest 2 so as to be able to swing. are connected by a slide connecting means 46.
- the slide connecting means 46 connects at least one of the backrest support links and at least one of the seat support links so as to be slidable within a certain range so that the backrest 2 and the seat 3 are interlocked. is there.
- the slide connecting means 46 is provided with a lever portion 43 protruding in the direction of rotating to the reclining posture side at the lower end of the second seat support link 7.
- the second backrest support link 26 is extended below the second seat support link 7 by forming a bell crank having a bell-crank lever part 4 at the lower end of the second seat support link 7. 3 and the tip of the second backrest support link 26 are arranged side by side so that the guides of the levers 43 and the tip of the second backrest support link 26 are respectively aligned.
- the lock block 31 is rotatably mounted with pins 38 and 39, and the connection block 40 is penetrated and fixed thereto.
- the connecting pin 40 can be slid with respect to the guide block 31 and is provided so as not to fall off the guide block 31 with a C-shaped retaining ring or the like (not shown).
- the second backrest support link 26 and the tip bell-crank lever portion 43 of the second seat support link 7 are connected to each other so that the distance between them can be changed.
- the slide connecting means 46 may be provided between the first seat support link 5 and the first back support link 25 depending on the case. It is also possible to place each one between two different links.
- a spring 30 for assisting rotation is provided between the second backrest support link 26 and the seat support link 7 to apply a force for separating them.
- the spring 30 applies a reaction force to the backrest 2 by pushing and expanding the link 26 between the links 26 and 7 to the ends of the two strokes. Therefore, only the backrest 2 is tilted within the range in which the spring 30 expands and contracts, so that the angle with respect to the seat 3 can be increased, that is, the inclination of the backrest can be increased.
- the backrest 2 is tilted by this force, and the spring 30 is compressed. Further, the lever 30 of the bell crank is moved by the spring 30 toward the seat 3 forward.
- the mounting position of the rotation assisting spring 30 is determined by the relationship between the backrest support link and the tip of the bell crank of the seat support link (the tip of the lever portion 43), which is the closest when in the recruiting posture. It is preferable to be arranged at a certain position. In this case, the force for returning the backrest 2 to the original position can be used to the maximum. Therefore, in the present embodiment, the circumference of the connection pin 40 between the guide blocks 31 of the slide connection means 46 is set. It is inserted so as to be interposed.
- the rotation assist spring 30 may be disposed between the first or second backrest support link 25, 26 or the backrest 2 and the seat receiving member 10 depending on the case. A reaction force may be applied to the backrest 2.
- the second seat support link 7 is formed in a substantially Z-shape as a whole, and has a bell crank having lever portions 43 and 44 protruding in opposite directions at both ends thereof. It has.
- a reaction force adjusting portion 27 is provided at the tip of the upper lever portion 44, and a slide connecting means 46 is provided at the tip of the lower lever portion 43.
- the reaction force adjusting portion 27 has a plurality of stop holes 29 arranged so that the distance from the pin 17 to the pin 41 is different from each other.
- the seat receiving member 10 is provided with a stopper 32 to which the second seat support link 7 contacts when the seat 3 and the backrest 2 are in the reclining posture.
- the swing end of the second seat support link 7, that is, the front end position of the seat 3 in the reclining posture is determined.
- the stopper 32 is preferably provided near the pin 17.
- the seat 3 when the occupant leans on the backrest 2 while moving the seat 3 forward, the seat 3 is suspended by the first seat support link 5 and the second seat support link 7. It is rocked in the state that it was. At this time, the reaction force adjusting section 27 of the second seat support link 7 compresses the reaction force applying device 4, so that the reaction force of the locking of the seat 3 can be obtained.
- the backrest 2 is swung while being supported by the first backrest support link 25 and the second backrest support link 26.
- the rotation assist spring 30 provided between the second backrest support link 26 and the second seat support link ā ā is compressed, so that the angle of the backrest 2 with respect to the seat 3 increases and Using the second seat support
- the rotation of the link 7 can be urged, and the movement of the seat 3 forward can be assisted.
- the reaction force of the mouthrest of the backrest 2 can be obtained.
- the above embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications can be made without departing from the gist of the present invention.
- the case where the backrest 2 and the seat 3 are pin-coupled to change the angle between the two is mainly described. And can be a single node with a fixed angle. In this case, the backrest 2 and the seat 3 are integrally locked.
- only one four-bar rotation mechanism is required, and in the case of the embodiment of FIG. And only the second slider mechanism 21, 22 is sufficient.
- the center of the rotational movement of the backrest 2 and the seat 3 is not desired to be moved, for example, in the vicinity of a hand or an arm when working on a personal computer, but this is only an example of a set position.
- the center of the rotational movement as the virtual rotation axis in the working posture may be set at or near the viewpoint.
- the center of the rotational movement of the backrest and the seat receiving member and the center of the rotation of the seat and the seat receiving member should be set close to the part that the user does not want to move.
- reaction force device is not particularly limited to the compression coil spring as in the present embodiment.
- an elastomer material such as rubber may be provided at a connecting portion between each of the first to third links and the seat receiving member.
- Shearing force ā It is possible to incorporate a cylindrical reaction force device using torsion force.
- the explanation has been mainly given of the swivel chair for office use as an example, but the present invention is not particularly limited to this.
- the viewpoint can be prevented from changing before and after locking, and the chair back can be controlled. This is preferable because the rocking operation can be performed without blocking the later passage, and it is easy to take a comfortable posture without disturbing other customers.
- the rotation assisting spring 30 is incorporated in the slide connecting means 46, but the present invention is not limited to this.
- the rotation assist spring 30 may be disposed between the first or second backrest support link 25, 26 or the backrest 2 and the seat receiving member 10, and may be opposed to the backrest 2. Force may be applied. Further, it is not limited to the compression coil spring but may be a gas spring.
Landscapes
- Health & Medical Sciences (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
- Chairs Characterized By Structure (AREA)
Description
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Claims
1 . čåććØåŗ§ćØćęŗååÆč½ć«ęÆęććę©ę§ćØåčØčåćććć³åŗ§ćåęä½ē½® ć«ę»ćååćä»äøććååä»äøč£
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åć®ćććć³ ć°č£
ē½®ć«ććć¦ć åčØčåćććć³åŗ§ć®ć¢ććć©ć¤ ćå§æå¢ćććŖćÆć©ć¤ćć³ć°å§æ å¢ćøå¾åććå転éåć®äøåæćåčØåŗ§ććäøę¹ć§ćć¤åčØčåććććåę¹ć«čØ å®ćć åčØčåćåć³åŗ§ćåęć«ę²ćæćŖććåę¹ćøē§»åććććć«ććććØćē¹ å¾“ćØććę¤
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2 . åčØå転éåć®äøåæćÆåčØåŗ§ć®åę¹åÆćć§ćć¤åčØåŗ§ććäøę¹ć«čØå®ćć ćććØćē¹å¾“ćØććč«ę±ć®ēÆå²ē¬¬ 1é
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3 . åčØå転éåć®äøåæćć ćććć³ć°åä½ć§åćććććŖćä½ē½®ććććÆć ć®čæåć«čØććććØćē¹å¾“ćØććč«ę±ć®ēÆå²ē¬¬ 1é
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4 . åčØå転éåć®äøåæćć ēåŗ§č
ćä½ę„ćććØćć®ä½ę„ē¹ććććÆćć®čæå ć«čØććććØćē¹å¾“ćØććč«ę±ć®ēÆå²ē¬¬ 1é
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5 . åčØčåćććć³åčØåŗ§ćććććęŗååÆč½ć«ęÆęććåčØę©ę§ćåčØč åćććć³åŗ§ćēÆć® 1ć¤ćØćć¦å«ćåēÆå転ę©ę§ć«ćć£ć¦ę§ęćććØćØćć«ć å čØčåććØåƾåććēÆććć³åčØåŗ§ćØåƾåććēÆćåŗå®ēÆćØććććØćē¹å¾“ćØć ćč«ę±ć®ēÆå²ē¬¬ 1é
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6 . åčØčåććØåčØåŗ§ćäŗćć«å転čŖåØć«é£ēµćććØćØćć«ć äøē«Æćåŗå®ēÆ ćØćć¦ć®åčØåŗ§åćéØęć«é£ēµćć¦ęŗåäøåæćØćä»ē«Æć§åčØčåććØåčØåŗ§ć®å čØé£ēµē¹ćęÆęćć第 1ćŖć³ćÆćØć äøē«ÆćåčØåŗ§åćéØęć«é£ēµćć¦ęŗåäøåæćØ ćä»ē«Æć§åčØčåććęÆęćć第 2ćŖć³ćÆćØć äøē«ÆćåčØåŗ§åćéØęć«é£ēµć㦠ęŗåäøåæćØćä»ē«Æć§åčØåŗ§ćęÆęćć第 3ćŖć³ćÆćØćåćć ććć第 1ćć第 3 ć®ćŖć³ćÆć§åčØčåćććć³åŗ§ćåčØåŗ§åćéØęć«åć
ęŗåčŖåØć«åćäøććå ēÆå転ę©ę§ćę§ęććććØćē¹å¾“ćØććč«ę±ć®ēÆå²ē¬¬ 5é
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7 . åčØååä»äøč£
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8 . åčØčåććØåčØåŗ§ćØćéćč§åŗ¦ćåŗå®ć«ćć 1ć¤ć®ēÆćØćć åčØčåć éØåćØåčØåŗ§åćéØęćØć®éć«čØćććć¦åčØčåććäøē¹ć§ęÆęćć¦äøäøę¹å äø¦ć³ć«åå¾ę¹åćøć®ē§»åćę”å
ćć第 1ć®ć¹ć©ć¤ćę©ę§ćØć åčØåŗ§éØåćØåčØåŗ§ åćéØęćØć®éć«čØćććć¦åčØåŗ§ćäøē¹ć§ęÆęćć¦åå¾ę¹åäø¦ć³ć«äøäøę¹åćø ć®ē§»åćę”å
ćć第 2ć®ć¹ć©ć¤ćę©ę§ćØćåćć åčØčåćććć³åčØåŗ§ćåčØ ē¬¬ 1åć³ē¬¬ 2ć®ć¹ć©ć¤ćę©ę§ć§ęŗååÆč½ć«åčØåŗ§åćéØęć«ęÆęćććććØćē¹ å¾“ćØććč«ę±ć®ēÆå²ē¬¬ 1é
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9 . åčØčåććØåčØåŗ§ćØćåčØčåćć®äøē«Æå“ćØåčØčåćć®å¾ē«Æå“ćØćäŗ ćć«å転åÆč½ć«é£ēµćććØå
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1 0 . åčØåŗ§ć®éäøéćÆå¾ē«Æå“ćććå端å“ćå°ćććŖćććć«čØå®ććć¦ć ćććØćē¹å¾“ćØććč«ę±ć®ēÆå²ē¬¬ 1é
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1 1 . åčØčåćććć³åčØåŗ§ćććććęŗååÆč½ć«ęÆęććåčØę©ę§ćć å čØčåćććć³åŗ§ćēÆć® 1ć¤ćØćć¦å«ćåēÆå転ę©ę§ć«ćć£ć¦ę§ęćć å°ćć¤å čØåŗ§ćØåƾåććēÆćÆåŗå®ēÆć§ćććØå
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| JP2001562983A JP4810046B2 (ja) | 2000-02-29 | 2001-02-28 | ę¤ åć®ćććć³ć°č£ ē½® |
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| JP2000054983 | 2000-02-29 |
Publications (1)
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| WO2001064080A1 true WO2001064080A1 (en) | 2001-09-07 |
Family
ID=18576172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2001/001522 Ceased WO2001064080A1 (en) | 2000-02-29 | 2001-02-28 | Locking device of chair |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4810046B2 (ja) |
| WO (1) | WO2001064080A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007236554A (ja) * | 2006-03-07 | 2007-09-20 | Delta Tooling Co Ltd | åŗ§åøę§é |
| EP3262982A1 (en) * | 2016-06-28 | 2018-01-03 | Posturite Limited | Seat tilting mechanism |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6150597B2 (ja) * | 2013-04-19 | 2017-06-21 | ć³ć¤ćé»å·„ę Ŗå¼ä¼ē¤¾ | åŗ§åøč£ ē½® |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58177608A (ja) * | 1982-04-12 | 1983-10-18 | ę„ę¬ēŗę”ę Ŗå¼ä¼ē¤¾ | ććć®åŗ§ć¶ćØćć»čęŗć®čŖåå¾©åø°č£ ē½® |
| JPS63109818A (ja) * | 1986-06-04 | 1988-05-14 | ć¬āćāćć²āćØć ćāćāććŗć¤ććć”āćć«ć“ćØć«ć± | ę¤ åč£ ē½® |
| JPH01139013A (ja) * | 1987-07-31 | 1989-05-31 | Kokuyo Co Ltd | ę¤ å |
| JPH0686720A (ja) * | 1992-07-17 | 1994-03-29 | Itoki Crebio Corp | ę¤ å |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07313282A (ja) * | 1994-05-30 | 1995-12-05 | Mitsuo Nagase | čå½ć¦ä»ćę¤ åć®ęÆęæę§é |
| NO300754B1 (no) * | 1994-10-14 | 1997-07-21 | Handicare Ind As | Anordning ved stillbar stol |
-
2001
- 2001-02-28 JP JP2001562983A patent/JP4810046B2/ja not_active Expired - Fee Related
- 2001-02-28 WO PCT/JP2001/001522 patent/WO2001064080A1/ja not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58177608A (ja) * | 1982-04-12 | 1983-10-18 | ę„ę¬ēŗę”ę Ŗå¼ä¼ē¤¾ | ććć®åŗ§ć¶ćØćć»čęŗć®čŖåå¾©åø°č£ ē½® |
| JPS63109818A (ja) * | 1986-06-04 | 1988-05-14 | ć¬āćāćć²āćØć ćāćāććŗć¤ććć”āćć«ć“ćØć«ć± | ę¤ åč£ ē½® |
| JPH01139013A (ja) * | 1987-07-31 | 1989-05-31 | Kokuyo Co Ltd | ę¤ å |
| JPH0686720A (ja) * | 1992-07-17 | 1994-03-29 | Itoki Crebio Corp | ę¤ å |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007236554A (ja) * | 2006-03-07 | 2007-09-20 | Delta Tooling Co Ltd | åŗ§åøę§é |
| EP3262982A1 (en) * | 2016-06-28 | 2018-01-03 | Posturite Limited | Seat tilting mechanism |
| US10357108B2 (en) | 2016-06-28 | 2019-07-23 | Posturite Limited | Seat tilting mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4810046B2 (ja) | 2011-11-09 |
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