WO2010071282A1 - Chair with separate but interconnecting lumbar and thoracic supports - Google Patents

Abstract

The present invention relates to a chair with separate but interconnecting lumbar and thoracic supports. A back support is physically divided into a lumbar support and a thoracic support. The lumbar support is formed to be curvable, and the lumbar and thoracic supports are configured to be interconnecting. Thus, when a sitter tilts his/her upper or lower back backward for rest or tension relief, the lower back area of the sitter is comfortably brought into contact with and supported by the lumbar support with a backward tilt of a relatively large angle, and at the same time, the upper back area of the sitter is comfortably brought into contact with and supported by the thoracic support with a backward tilt of a relatively small angle. Therefore, the lumbar and thoracic supports share the task of comfortably supporting the lumbar vertebra and thoracic vertebra respectively. In addition, the chair has high posture stability without falling backward when a sitter tilts his/her upper and lower back far backward, and also has an elegant look.

Description

Chair with separate interlocking lumbar and thoracic support

The present invention relates to a chair having a separate interlocking lumbar spine and thoracic support. More specifically, the back support is physically separated into the lumbar support and the thoracic support, and the lumbar support is formed to be bent. In this case, they are interlocked, so that when the seated person leans back and back in order to relax or relax, the lumbar support portion, which is relatively angularly rearward, makes comfortable close support for the lower back and at the same time. Since the close support of the back part is made by the thoracic supporter, which has a small angle of the rear tilting, the lumbar support and the thoracic supporter cooperate with each other to independently support the lumbar spine and the thoracic spine, respectively, and of course, sit comfortably. If you stretch your back and back greatly The present invention also relates to a chair having a detachable interlocking lumbar spine and thoracic spine support having excellent postural stability of the chair itself without passing the whole chair backward.

 In today's fiercely competitive society, and as the use of computers becomes a part of life, the time spent on modern chairs has increased significantly compared to the past, and students who spend much of their time sitting on chairs In addition, the number of examinees or clerical workers who complain of back or spinal pain is increasing.

      This back pain or thoracic pain is most often due to long periods of repeated sitting in tension, habitual incorrect sitting posture, sleep in the wrong posture and the environment, or excessive force transfer in the wrong posture. to be.

      Thus, office chairs with integrated backrests for supporting the lumbar and thoracic vertebrae of the prior art mostly have their backs retracted to some extent for occasional rest due to prolonged sitting or occasional relaxation of the lumbar and thoracic supportive ligaments and muscles. It adopts elastic structure to be able to lose.

      However, the chairs of the backrest elastic structure in which the backrests are integrally integrated to support the lumbar and thoracic vertebrae are seated on the waist and the back of the human spine structure in which the thoracic and lumbar spine are curved in an "S" shape from the side. If you lean back, the thoracic spine will be closely attached to the upper half of the back, but the lumbar spine will become larger and spaced apart from the lower half of the back. This phenomenon will become more severe around the boundary between the thoracic and lumbar spine. There is a problem in that it becomes a major factor to give the group reverse or feel uncomfortable.

      Therefore, in order to solve the above problems, many chair users use an auxiliary cushion to fill the space behind the waist, but since the seat size and posture of the seated person are different from each other, the auxiliary cushion having proper volume, shape, and elasticity It is not easy to select, and if you choose to use a thing that does not suit you, there is a problem that the use effect is weak or contrary to the wrong seating posture, and there is also a risk of loss.

      As a conventional method for solving the above-described conventional problems, Korean Patent Publication No. 10-2005-0046953 (published date: 05.05.19 .: Patent No. 10-0583585) by the present inventors, as shown in Figure 7 Similarly, the backrest is formed into the back support part 4 and the waist support part 3, and one end of the metal back frame 4a is connected to the back support part 4, and the other end of the extension part 4e forms the seat part 2. While the chair 1 'is provided with a waist support having a structure connected to the leaf spring 4f extending to the lower multifunctional bracket 7, the backrest is lowered as shown in FIG. Formed separately into the back support part 4 and the waist support part 3 extending in a long direction, one end of the leaf spring 4f is connected to the above-described extension part of the back support part 4, and the other end of the seat part 2 is multifunctional. A chair 1 ″ having a waist support having a structure connected to the bracket 7 is disclosed. The lower chair 1 'or 1 "has a stiffness that does not lean back because the waist support 3 integrally formed with the seat 2 does not interlock with the back support 4 described above. In addition, since it is generally formed as an upright smooth type, when the seated person leans back and back greatly, there is still space in the lumbar region, and it is not ergonomically satisfactory for comfort. The problem that the bend angle at the boundary between the waist support 3 and the back inclined back support 4 is increased and may cause stress or discomfort at the boundary between the waist and the back.

      In addition, the conventional chair 1 'or 1 ″ has a problem that the appearance is inferior in appearance because the metal back frame 4a is in the form of a strip exposed to the outside.

In the drawings, reference numeral 6 denotes an arm rest, 7a denotes a frame, and 9 denotes a support angle.

      Therefore, the first object of the present invention is that the lumbar spine and thoracic spine part is firmly supported while seated in a correct posture, and even if the seated person is greatly tilted back and back, the comfort is supported by the close contact without generating a space in the lumbar part. It is to provide a chair having a high ergonomic separate interlocking lumbar and thoracic support.

      The second object of the present invention is to provide a chair having an ergonomic detachable interlocking lumbar spine and thoracic spine support having excellent postural stability even when the seated person is greatly tilted back and back in addition to the first object described above. It is for.

      The third object of the present invention is that in addition to the first and second objects described above, even when the seated person is greatly tilted back and back, the present invention can be maintained as it is without the need to extend the arm placed on the arm rest. It is to provide a chair having an ergonomic detachable interlocking lumbar and thoracic spine support that enhances comfort and comfort.

      The fourth object of the present invention, in addition to the first and second objects described above, the height of the armrest can be easily adjusted according to the height of the seated person or the use mode, thereby improving comfort and comfort. To provide a chair having a separate interlocking lumbar and thoracic support.

      The fifth object of the present invention is to provide a chair having an ergonomic detachable interlocking lumbar spine and thoracic spine support, in addition to the above-mentioned objects, so that the curvature of the backing plate made of a resin can be easily performed during the rear curve of the thoracic spine support. It is for.

A sixth object of the present invention is to provide a chair having an ergonomic detachable interlocking lumbar spine and thoracic spine support that impart good seating by air cushion in addition to the above-mentioned objects.

 According to a preferred aspect of the present invention for smoothly achieving the above-described first and second objects of the present invention, the back support is divided into a lumbar support having a lumbar support and a frame, and the lumbar support and the seat are A chair, which is integrally formed by a built-in frame and in which the frame of the thoracic supporter is elastically connected to the frame or bracket of the bottom of the seat portion by a leaf spring, wherein the built-in frame is the lumbar support portion from the seat. The main frame extends to the lower half and at least one auxiliary frame positioned at the upper half of the lumbar support, and the main frame and the at least one auxiliary frame are separated from each other by at least one leaf spring. (backing) so that the lumbar support is configured to be posteriorly curved The separation according to claim linked chair with lumbar and thoracic support is provided for.

 According to another preferred aspect of the present invention for smoothly achieving the first and second objects of the present invention, in the above aspect, the thoracic vertebral support has an extension via a step, and an upper end of the lumbar support There is provided a chair having a detachable interlocking lumbar and thoracic spine support, characterized in that it maintains contact with the step.

 According to a preferred aspect of the present invention for smoothly achieving the third object of the present invention, in the above-described aspect, one end of the frame of the armrest is fixed to the lower part of the extension of the thoracic supporter by the fastener, so that the rear of the thoracic supporter is There is provided a chair having a separate interlocking lumbar and thoracic spine support, characterized in that the armrest is interlocked and lifted when flipped.

     According to a preferred aspect of the present invention for smoothly achieving the fourth object of the present invention, the armrest is inserted into the height adjustment bracket and the height adjustment bracket is connected to the arm sheet and formed with a plurality of fixing projections therein; Provided is a chair having a detachable interlocking lumbar and thoracic vertebrae support, characterized in that a plurality of fixing protrusion insertion grooves are formed at the end thereof to enable height adjustment or height and length adjustment of the arm sheet.

 According to a preferred aspect of the present invention for smoothly achieving the fifth object of the present invention, the frame is fixed to the back of the body of the thoracic supporter is made of a cushioning material and a soft shell surrounding it, and then a hard shell on the back of the frame. There is provided a chair having a detachable interlocking lumbar and thoracic spine support, characterized in that it is covered, and a cutout is formed laterally at a position at which the extension of the hard shell is formed so as to relieve curvature stress upon rearward folding.

 According to a preferred aspect of the present invention for smoothly achieving the sixth object of the present invention, at least one air inlet cap having a plurality of air inlet and outlet openings is attached to the side of the seat unit. And a chair having a thoracic spine support.

According to a preferred aspect of the present invention for smoothly achieving the above objects of the present invention, in the above aspect, one end of the connecting frame is fixed to the lower end of the frame of the thoracic spine support and the other end thereof is fixed to the bottom of the seat. The chair having a detachable interlocking lumbar spine and thoracic spine support, characterized in that the pivotable frame is elastically supported by the spring and the length adjustable insertion is fixed to the frame fixed pivotally by a link to the bracket. Is provided.

The chair having an ergonomic separate interlocking lumbar and thoracic support according to the present invention forms the backrest into the lumbar support and the thoracic support, and also forms the lumbar support in a flexible manner, while the lumbar support and the thoracic support are interlocked. This ensures that the lumbar and thoracic vertebrae are tightly supported when seated in the correct position, and that even when the seated person leans back and back greatly for relaxation or relaxation, there is no strict support for lumbar spine. It maintains comfort and comfort while maintaining a high posture stability without overturning the chair even in such a state. Optionally, the height of the armrest can be changed depending on the height of the seated person and the mode of use. Easily adjustable for even more comfort and comfort, Is possible to impart good chakseokgam by the addition thereto of air cushion on the seat portion.

 1 is a perspective view of an upright state of a chair having a separate interlocking lumbar spine and thoracic spine support according to a preferred embodiment of the present invention.

      FIG. 2 is a perspective view of the rear flipped state of FIG. 1.

      3 is a side view of FIG. 1.

      4 is a partially cut longitudinal cross-sectional view in the upright state illustrated in FIG. 1.

      FIG. 5 is a partial cutaway longitudinal cross-sectional view in the rear flipped state shown in FIG. 2. FIG.

     6 is an upright state perspective view of a chair having a separate interlocking lumbar spine and thoracic spine support according to another preferred embodiment of the present invention.

     Figure 7 is a partial cut longitudinal cross-sectional view showing the operating state of a chair having a conventional separate lumbar and thoracic spine support by the present inventors.

 Fig. 8 is a partial cut longitudinal sectional view showing an operating state of a chair having a conventional detachable lumbar and thoracic vertebral support by the present inventors.

     Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

     First, Figure 1 is an upright state perspective view of a chair (1) having a separate interlocking lumbar spine and thoracic spine support according to one preferred embodiment of the present invention, Figure 2 is a perspective view of the rear flipped state of Figure 1, Figure 3 is 4 and 5 are partially cut longitudinal cross-sectional views in an upright state and a rearwardly folded state as shown in FIGS. 1 and 2, respectively, and will be referred to together for convenience of description.

     Chair (1) having an ergonomic separate interlocking lumbar and thoracic spine support according to the present invention is a seat portion (2), integrally formed and rearwardly curved lumbar support (3), and the lumbar support (3) The elastic body is elastically separated and has a thoracic supporter 4 having a frame 4a, a headrest 5 as an optional component, an armrest 6, and the thoracic supporter 4 and the lower end elastically. It consists of a multifunction bracket 7 for supporting connection, a central axis 8 and a support angle 9 to which a caster 9a (caster) is attached.

     First, the seat part 2 and the lumbar support part 3 formed integrally will be described. In the region extending from the seat part 2 to the lower half of the lumbar support part 3 or to the vicinity of the central part, approximately “ An L ”shaped main frame 2a is built in, and an auxiliary frame 3a is built in the upper region from approximately the upper half or near the center of the lumbar support 3, and the lumbar support of the main frame 2a is (3) The force A in FIG. 2 by backing by the leaf spring 3b in the state which the one end extended inwardly and the lower one end of the said auxiliary frame 3a are mutually spaced apart. When the above lumbar support 3 is configured to be able to bend backward.

 Although the illustrated example shows only the case where the auxiliary frame 3a and the leaf spring 3b are only one, the present invention is not limited thereto and, if necessary, they may be composed of at least one or more. The back support 3 may be gradually and gradually curved gradually stepwise by backing the respective leaf springs 3b between the spaced ends of the plurality of auxiliary frames 3a. Of course, it is within the scope of the invention.

     The seat portion 2 and the lumbar support 3 have the auxiliary frame 3a and the main frame 2a as the core material, and the surroundings are surrounded by a normal cushioning material (not shown) and then the outer surface thereof. It is to be noted that there is a coat (not shown) of natural or synthetic fabrics or non-woven fabrics, or artificial or natural leather.

     The shape of the lumbar support 3 is formed to have an annular protrusion 3c in the center of the front surface in consideration of the normal curvature of the human lumbar spine at the time of standing up, and both sides of the annular protrusion 3c are also Of course, it is preferable to form a shape in which the center part is warmly surrounded by relatively slightly protruding, in terms of reducing fatigue.

     On the other hand, if necessary, optionally, by attaching at least one conventional air inlet cap (not shown) formed with a plurality of air inlet and outlet on the side of the seat portion 2 may be able to feel the air cushion when seated And, it is known in the art that the installation of such an air inlet cap (not shown) is preferable when the above-described outer shell (not shown) is a sheet or leather of a synthetic resin material.

     Subsequently, the thoracic supporter 4 will be described. The thoracic supporter 4 is formed of an independent member separate from the lumbar supporter 3 described above. An extension portion 4e is provided via 4d), and the step 4d is maintained in contact with the upper end portion 3d of the lumbar support 3.

     The thoracic vertebrae support part 4 is also made of the frame 4a as a core material and is surrounded by a normal cushioning material (not shown), and the outer surface is made of natural or synthetic fabric or non-woven fabric, or artificial or natural leather. Although it is common to cover the outer shell (not shown), as in the illustrated example, considering the economical and aesthetic aspects, the above-mentioned thoracic vertebral support 4 is cushioned (not shown) and a soft shell (not shown) surrounding it. Fix the frame 4a on the back of the body (not shown) and cover the back of the frame 4a with a hard skin 4b such as a synthetic resin board or a wood chip board. Alternatively, in the latter case, if necessary, the posterior tilting of the thoracic support part 4 is formed by forming a notch 4g laterally at a curved position where the extension part 4e of the hard shell 4b starts to form. City hard It can be formed to eliminate the bending stress exerted on the skin (4b).

 A curved portion 4c is formed on the central front surface of the thoracic vertebrae support 4, and both sides of the curved portion 4c also protrude relatively slightly further, so that the entire central portion is surrounded by warm, reducing fatigue. It is more preferable at the side.

     Of course, the frame 4a of the thoracic spine support 4 extends to the lower end of the extension 4e.

     The head rest 5 is not an essential element in the present invention, but an optional element, which will be briefly described with reference to the illustrated example. Can adopt one.

    In the illustrated example, the headrest 5 is formed to have a protrusion 5a on the front surface, and has a structure that can comfortably wrap and support the back head by tension of the fabric. The presence of the headrest 5 is located at the lumbar and thoracic vertebrae. The load can be reduced. In the illustrated example, the headrest 5 is fixed to one end of the connecting frame 5b by the connector 5c and the other end thereof may be directly connected to the upper end of the frame 4a of the thoracic support 4, but typically the thoracic vertebrae The upper end of the support portion 4 is inserted and fixed to the height adjustable.

     Next, the armrest 6 will be described. The armrest 6 supports arm seats 6a made of various materials such as polyurethane or the like, having a cushioning effect on which an arm is placed or a material having a good surface feel. Frame 6b, which is usually fixed to a bracket 7 or other frame, which will be described later on the bottom of the seat 2, in the illustrated example according to the present invention. One end of the frame 6b is directly fixed to the lower end of the frame 4 of the thoracic spine support 4 described above by any suitable fastening means 6c, such as a set screw or spot welding.

     Thus, in the illustrated example of the present invention, one end of the armrest 6 is fixed directly to the lower end of the thoracic spine support 4 so that the armrest 6 at the time of the rearward bending of the force B in FIG. 2 of the thoracic spine support 4 acts. ) Will be interlocked, so that when you lean the thoracic supporter 4 backward, you can relax or rest in a comfortable and comfortable state without having to reposition the arm placed on the armrest 6. do.

     In addition, although not shown in the drawings, similar to the case of another embodiment according to the present invention of FIG. 6, which will be described later, a height adjusting bracket having a plurality of fixing protrusions (not shown) formed therein (for example, in FIG. 6). A reference numeral 6d) is integrally formed with or connected to the arm sheet 6a, and a plurality of fixing protrusion insertion grooves (not shown) are inserted into the insertion end inserted into the height adjustment bracket of the frame 6b. ), And the part can be simultaneously drawn out or drawn out from the above-mentioned height adjustment bracket to form the height adjustment of the arm sheet 6a, or the height and length adjustment at the same time. Is in the area of.

 The bracket 7 is then secured to the bottom of the seat 2 and is a multifunctional bracket, which is a tension lever for adjusting the strength of the backrest and a round lever for adjusting the strength of the seat and the height of the chair. A known angle adjusting lever 7c or the like to which a synchronized tilting mechanism capable of performing adjustment and tilt angle adjustment of the backrest is applied is mounted.

     At one end of the bracket 7, a frame 7a on which the other end of the connecting frame 4f, which is connected at one end to the lower end of the frame 4a of the thoracic supporter 4, is pivoted by the link 7e. The connecting frame 4f is inserted and fixed in the frame 7a by the length adjusting fastener 7d so as to be adjustable in length, and the pivotable frame 7a by the leaf spring 7f. The bracket 7 is inclined backward while maintaining the elastic restoring force during the rearward fold by the force B action of FIG. 2 of the thoracic vertebral support 7 which is elastically supported. It returns to its original state.

     On the other hand, although not necessarily essential and optional in the present invention, in the illustrated rotating chair, the upper end of the central shaft 8 is fixed to the bracket 7 and the lower end thereof is supported by the support angle 9. The urethane-based casters 9a are rotatably inserted in the center of the plurality of support ends of the support angles 9, for example, with less fear of floor scratches, less noise, quieter, less likely to break, and more durable. Can be mounted.

     Chair (1) having an ergonomic separate interlocking lumbar and thoracic spine support according to the present invention having such a configuration according to the preferred embodiment of the present invention described above, the seat and the waist for relaxation or relaxation When the back is folded back, the lumbar support 3 is supported by a leaf spring 3b which backs the auxiliary frame 3a, so that a rearward angle of relatively large angle is achieved to provide a comfortable and comfortable full close support for the waist. At the same time, as the upper end portion 3d of the lumbar support 3 is in contact with the step 4d of the thoracic spine support 4, a relatively small angle of the rearward tilting of the thoracic spine support 4 is achieved. Since the lumbar support and the thoracic support are interlocked with each other, the lumbar spine and the thoracic spine are independently divided, In addition to supporting comfort, the chair itself is excellent in postural stability without the whole chair going backward even when the seated person leans back and back.

     In particular, in the illustrated example, since the one end of the arm rest 6 is fixed to the end of the thoracic vertebral support 4 when the rear end is folded, the arm seat 6a of the arm rest 6 also rotates upward and upwards. Because it sounds slanted, you can relax comfortably and comfortably without changing your arm position.

     6 is a side view of a chair 1a having a separate interlocking lumbar and thoracic spine support according to another preferred embodiment of the present invention, the basic configuration of which is except for the armrest 6, and FIGS. It is essentially the same as the case shown in Figure 5, so only the differences will be explained.

     In the illustrated example, the height adjustment bracket 6d in which the armrest 6 has a plurality of fixing protrusions (not shown) is formed integrally with the arm seat 6a, and is inserted into the height adjustment bracket.止: A plurality of fixing protrusion insertion grooves (not shown) are formed at an insertion end formed at one end of the frame 6b to be inserted, and the height adjustment bracket 6d is inserted from the insertion end of the frame 6b. By drawing out or drawing in step, it is possible to simultaneously control the height of the arm sheet 6a or the height and length of the arm sheet 6a according to the use mode according to the physical condition and environmental conditions of the seated person. The other end of is not fixed to the thoracic spine support (4), but is fixed to the bracket (7) of the bottom of the seat portion (2), except for this configuration is essentially the same as the above-described embodiment, further description will be omitted All.

 Chair 1a having an ergonomic detachable interlocking lumbar and thoracic spine support according to another preferred embodiment of the present invention also has the remaining operating relationship except that the armrest 6 does not interlock with the thoracic support 4. Since the same as described above, the description thereof will also be omitted.

Chair having an ergonomic detachable interlocking lumbar and thoracic spine support according to the present invention, when the seated person leans back and back for relaxation or relaxation, the lumbar support and the thoracic support are mutually linked to each other to independently share the lumbar and thoracic vertebrae. As a result, the chair is comfortably supported, and the posture stability is excellent without worrying that the whole chair will fall backwards.

Claims (7)

 The backrest is divided into the lumbar support having lumbar support and frame, and the lumbar support and seat part are integrally formed by the internal frame, and the frame of the thoracic support is formed by the leaf spring of the bottom of the seat Or in a chair having an arm rest tiltably elastically connected to the bracket,       The inner frame is divided into a main frame extending from the seat portion to the lower half of the lumbar support and at least one auxiliary frame located in the upper half of the lumbar support, wherein the main frame and the at least one auxiliary frame A chair having a separated interlocking lumbar and thoracic spine support, characterized in that the lumbar support is configured to be able to bend backward by being backed apart from each other by at least one leaf spring. .  2. The chair of claim 1, wherein the thoracic supporter has an extension via the step, and the upper end of the lumbar support is in contact with the step.  The method of claim 1, wherein one end of the frame of the armrest is fixed to the lower portion of the extension portion of the thoracic spine support by a fastener so that the armrest is interlocked and lifted when the rear support of the thoracic support part is interlocked. And a chair having a thoracic spine support.  According to claim 1 or claim 3, wherein the armrest is a height adjustment bracket formed with a plurality of fixing projections on the inside and connected to the arm sheet, one end is inserted into the height adjustment bracket and the plurality of one end portion It is composed of a frame formed with grooves for inserting the two fixing protrusions, and the height adjustment of the arm sheet or the simultaneous adjustment of the height and length by the introduction and withdrawal of the height adjustment bracket from the frame, characterized in that it is possible A chair having a detachable interlocking lumbar and thoracic spine support.  According to claim 1, wherein the thoracic vertebral support is fixed to the back of the body of the cushioning material and the body of the soft shell surrounding it, the hard shell is coated on the back of the frame, the hard shell at the position where the extension is formed A chair having a separate interlocking lumbar spine and thoracic spine support, characterized in that a cutout is formed laterally to relieve curvature stress in the rearward fold.  The chair of claim 1, wherein at least one air inlet cap having a plurality of air inlets and outlets is attached to the side of the seat unit.  The frame according to any one of claims 1 to 3, wherein one end of the connecting frame is fixed to the lower end of the frame of the thoracic vertebral support and the other end thereof is pivotally fixed by a link to a bracket fixed to the seat bottom. A chair having a detachable interlocking lumbar spine and thoracic spine support, characterized in that the length of the pivotable frame is elastically supported by the leaf spring and is fixedly adjustable.

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