JP5931395B2 - Chair seat, chair back and chair - Google Patents

Description

  The present invention relates to a chair seat, a chair back, and a chair. More specifically, the present invention relates to a chair seat and a back structure of a chair that can be applied to, for example, an office chair, and a chair having a seat and a back including this structure.

  Conventionally, various ideas have been made on the seat surface of the chair so as to improve the sitting comfort of the seated person. As a conventional chair seat structure, for example, as shown in FIG. 10, the outer member 103 is composed of a metal plate base body 104 and a synthetic resin auxiliary support body 105, and the auxiliary support body 105 is used as a base. The inner shell 101 is fitted and fixed to the overhanging portion 104a of the body 104, and further, slits are formed in the inner shell 101 made of synthetic resin and attached to the auxiliary support body 105 via the locking claws 101a on the left and right sides. There is a thing which dents and deforms (patent document 1). In addition, the code | symbol 107 in FIG. 10 is a seat receiver attached to the leg upper end of a chair.

  As can be seen from the structure of the chair seat of Patent Document 1, the seat is configured by forming a core plate (inner shell 101) from a synthetic resin and placing the cushion material 102 on it. The structure is often covered with. And in the structure of the chair seat of the said patent document 1, the inner shell 101 which is a synthetic resin member which is a core material is provided with a slit, and is made to bend.

  Conventionally, an air cushion may be used as a cushion for a chair seat. Specifically, for example, an air cushion is placed on a seat base plate of a seat supported on the upper end of a chair leg. (Patent Document 2).

JP 2000-93250 A JP 2009-297319 A

  However, in the case of a structure in which the inner shell 101 made of synthetic resin is bent and deformed by providing a slit in the synthetic resin inner shell 101 like the structure of the chair seat of Patent Document 1, the inner shell 101 is bent and deformed according to the weight of the seated person. Therefore, there is a problem in that the seating surface only bends, and the amount of bending cannot be changed according to the characteristics and preferences of the seated person and the usage scene. For this reason, it is difficult to say that the structure of the chair seat of Patent Document 1 can ensure good sitting comfort according to various characteristics, preferences, and usage situations of the seated person, and is highly adaptable and versatile. It's hard to say.

  Moreover, in the seat of the chair of patent document 2, in order to sit directly on the air cushion mounted on the seat substrate, the degree of contact with the seated person's buttocks cannot be adjusted. Since the elasticity as a cushion cannot be adjusted by adjusting the amount of air, it is difficult to adjust the amount of bending as a seat, and it is difficult to say that the flexibility and versatility are high.

  Therefore, an object of the present invention is to provide a chair seat, a chair back, and a chair that can adjust the amount of deflection according to various characteristics and preferences of the seated person and usage scenes.

To achieve the above object, the chair seat according to claim 1 is the inner shell made of a resin, and a base member of the seat to which the inner shell is attached, said inner shell, each longitudinal direction before and after A front curved portion and a rear side formed by folding the front end portion and the rear end portion downward, respectively. The front end and the rear end of the inner shell are located below the portion between the front curved portion and the rear curved portion by having a curved portion and are folded downward to form a base member of the seat. mounting is, the the deformation space for the inner shell is bent is formed, and an adjusting member deflection on the deflection space Bei example so that between the base member and the inner shell the seat There. According to a second aspect of the present invention, the chair seat includes a resin inner shell and a base member of the seat to which the inner shell is attached. And a plurality of band members arranged side by side in the front-rear direction, the band member having a left curved portion and a right curved portion formed by folding the left end portion and the right end portion downward, respectively, The left end and the right end of the inner shell, which are positioned below the portion between the left curved portion and the right curved portion, are attached to the base member of the seat, and the inner shell and the A bending space for bending the inner shell is formed between the base member of the seat and a bending adjusting member is provided in the bending space.

Further, the back of the chair according to claim 3 has a resin inner shell and a back base member to which the inner shell is attached, and the inner shell has its longitudinal direction along the vertical direction. And a plurality of belt members arranged side by side in the left-right direction, and the belt member has an upper curved portion and a lower curved portion formed by folding back an upper end portion and a lower end portion, respectively, An upper end and a lower end of the inner shell, which are positioned behind a portion between the upper curved portion and the lower curved portion by being folded back, are attached to the back base member, and the inner shell A bending space for bending the inner shell is formed between the base member and the back base member, and a bending adjusting member is provided in the bending space. Further, the back of the chair according to claim 4 has a resin inner shell and a back base member to which the inner shell is attached, and each longitudinal direction of the inner shell extends along the left-right direction. And a plurality of belt members arranged side by side in the vertical direction, and the belt member has a left curved portion and a right curved portion formed by folding the left end portion and the right end portion backward, and the rear The left end and the right end of the inner shell, which are positioned behind the portion between the left curved portion and the right curved portion, are attached to the base member of the back, and the inner shell and the A bending space for the inner shell to bend is formed between the back base member and a bending adjusting member in the bending space.

  Therefore, according to the seat of the chair and the back of the chair, by adjusting the amount of bending of the bending portion of the inner shell by the bending adjusting member, for example, the characteristics of the seated person such as light weight, the seat portion and the back portion are stiff. The amount of flexion of the seat and back is adjusted according to the seated person's preference, such as good and soft, and the use situation that it is hard during work and soft during rest.

Further, according to the back of the seat or chair of these chairs and seat or back of the chair element that have a regulating member deflected downwardly or rearwardly of the inner shell is realized by a simple configuration. Furthermore, according to the seats of the chairs and the backs of the chairs, the plurality of belt members arranged side by side are each flexed and deformed independently to support the seated person's buttocks and backs. The seating surface and the back surface are deformed finely according to the shape and movement of the back.

According to a fifth aspect of the present invention, in the chair seat or the back of the chair according to any one of the first to fourth aspects, the deflection adjusting member is formed in a bag shape, and gas or liquid is used. The volume and the elastic force are changed by taking in and out. In this case, the amount of deflection of the inner shell is finely adjusted by changing the volume and elastic force of the deflection adjusting member.

According to a sixth aspect of the present invention, in the seat of the chair or the back of the chair according to any one of the first to fourth aspects, a slit is formed in at least a part of the plurality of belt members. It is like that. In this case, the amount of bending is adjusted by adjusting the elastic force (hardness) of the entire inner shell according to the degree of formation of the slit. Further, the elastic force (hardness) varies depending on the location of the inner shell by changing the degree of formation of the slit depending on the location of the inner shell.

The chair of claim 7 wherein is so provided at least one of the back seat and chair chair according to any one of claims 1 6. In this case, a corresponding action among the actions of the inventions described in claims 1 to 6 is exhibited.

  According to the seat of the chair of the present invention, the back of the chair, it is possible to change the amount of flexure according to the characteristics and preferences of the seated person and the usage scene, and to ensure good sitting comfort and drooling comfort, It becomes possible to improve versatility.

Chair seat of the present invention, according to the back of the chair, and further, it is possible to realize by the seat or back simple configuration chair child that having a regulating member deflected downwardly or rearwardly of the inner shell, the chair It becomes possible to improve the versatility of the seat and back configuration.

  According to the chair seat and chair back of the present invention, the amount of bending can be adjusted by adjusting the elastic force (hardness) of the entire inner shell. It becomes possible to realize a better sitting comfort and drowning comfort. In addition, since the elastic force (hardness) can be changed depending on the location of the inner shell, finer adjustment of the elastic force in consideration of the normal posture and inclined posture of the seated person makes it even better・ It becomes possible to realize a feeling of drowning.

According to the seat of the chair and the back of the chair according to the present invention, the seat surface and the back surface can be finely deformed according to the shape and movement of the seat occupant's buttocks and back, so the fit of the buttocks and the back can be greatly improved. It will be possible to achieve an exceptional sitting comfort and drowning comfort that has never been achieved .

  Moreover, according to the chair of this invention, the effect by the seat of the above-mentioned chair and the back of a chair is exhibited.

It is a perspective view of the chair of an embodiment. It is a side view of the chair of an embodiment. It is a top view of the chair of an embodiment. It is a front view of the chair of an embodiment. It is a perspective view of the seat of the chair of an embodiment. It is a top view of the seat of the chair of an embodiment. It is a disassembled perspective view of the seat of the chair of embodiment. It is a side view which shows embodiment of the seat of a chair. (A) is a side view of the embodiment of FIGS. 5 and 6. (B) is a side view of another embodiment. (C) is a side view of still another embodiment. It is a side view which shows the other example of the seat of a chair. (A) is a side view which shows the example in case a solid support part is not formed in the rear-end part of an inner shell. (B) is a side view showing still another example in the case where the three-dimensional support portion is not formed at the rear end portion of the inner shell. It is a separation front sectional view showing the structure of the seat of the conventional chair.

  Hereinafter, the configuration of the present invention will be described in detail based on an example of an embodiment shown in the drawings.

  1 to 6 show an example of an embodiment of the chair seat of the present invention. In the present embodiment, the case where the seat of the chair of the present invention is applied to a chair 20 whose overall structure is shown in FIGS. 1 to 4 will be described as an example. Further, in the present specification, vertical, front / rear, and left / right are defined based on a seated person sitting on the seat 10 of the chair 20.

  The chair 20 of the present embodiment includes a leg 21 having a caster, a support base 8 attached to and supported by the top of the leg column 21a of the leg 21, and a front end portion swingably attached to a rear portion of the support base 8. Back plate support member 22, back base member 23 attached to the back plate support member 22, base member 11 of the seat attached to and supported by the support base 8, and inner seat of the seat attached to the base member 11 of the seat And a shell 13. 5 and 6, the illustration of the base member 11 of the seat is omitted, and only the inner shell 13 is illustrated.

  And the seat of the chair of this invention has the resin-made inner shells 13 and the bending adjustment member 16 arrange | positioned under the inner shells 13.

  In the present embodiment, the inner shell 13 has a three-dimensional structure including the three-dimensional support portions 13a and 13b at both the front and rear end portions, and the bending adjustment member 16 is disposed in the space 15 into which the bending portion 13e of the inner shell 13 is bent and enters. Have been like that. In the present embodiment, the inner shell 13 is configured by arranging a plurality of band members 13A side by side.

  In the present embodiment, the front end portion and the rear end portion of each band member 13A constituting the inner shell 13 are a three-dimensional support portion, and the front curved portion 13a formed by folding the front end portion and the rear end portion downward, and It has the rear side curved part 13b, and is formed in the side view horizontal U shape.

  The material of the inner shell 13 (the belt member 13A) is not limited to a specific material as long as it can be bent by the load of a person's seating. Specifically, for example, synthetic resin is used. In the present embodiment, the belt member 13A is a resin molded product using polypropylene.

  Here, the portion between the front curved portion 13a and the rear curved portion 13b of the band member 13A is referred to as a bent portion 13e. Of course, the bending portion 13e of the band member 13A is also a bending portion for the inner shell 13.

  In the present embodiment, eight belt members 13A are arranged side by side, specifically, side by side in the direction perpendicular to the longitudinal direction of the belt member 13A, and the inner shell 13 is configured. If the number of the band members 13A is two or more, the number of the band members 13A is not limited to eight, and the width of each band member 13A is not limited to a specific width. In this embodiment, the widths of the band members 13A are all the same, but the widths may be changed depending on the band members 13A.

  The front end 13c and the rear end 13d, which are positioned below the bent portion 13e by being folded downward, are attached to the base member 11 of the seat by adhesion or screwing.

  Then, as described above, the front end portion and the rear end portion are folded back to form the front curved portion 13a and the rear curved portion 13b as three-dimensional support portions, whereby the flexible portion 13e of the band member 13A is the base member 11 of the seat. And located above the base member 11 of the seat. Thus, the three-dimensional support portion in the present invention is such that the planar position of the front end 13c and the rear end 13d of the inner shell 13 is different from the planar position of the flexible portion 13e so that the inner shell 13 has a three-dimensional shape (in other words, high The bent portion 13e is supported in such a manner as to have a shape having a thickness. A space (hereinafter referred to as a bending space 15) is formed between a member (base member 11 of the seat in the present embodiment) below the bending portion 13e of the inner shell 13 to which the front end 13c and the rear end 13d are fixedly attached. Called) is formed.

  In addition, the three-dimensional support portions (13a, 13b) position the bending portion 13e above the base member 11 of the seat, and at the top, the boundary between the front end and the rear end of the bending portion 13e, that is, the front side bending portion 13a, and the rear side bending. The boundary with the portion 13b is supported so as to be rotatable, and the distance between the boundaries is supported so as to be changeable (specifically, in the present embodiment, the curved portion 13a is applied by applying / releasing a load). , 13b changes the distance between the boundaries. In other words, the three-dimensional support portions (13a, 13b) in the present invention are bent and rotated (in other words, rotated in the left-right direction axis) as a shape / mechanism for promoting the bending of the inner shell 13, by rotating the front end and the rear end of the bending portion 13e. It functions and supports as a rotation fulcrum that allows rotation in the axis and a movable fulcrum that allows movement in the front-rear direction. Thereby, when a seated person sits on the seat part 10, the bending part 13e can fully bend, and the fit feeling of a seated person's buttocks and the seat part 10 becomes favorable.

  In the present embodiment, each band member 13A is formed with a slit 13f extending from the front curved portion 13a to the middle of the bent portion 13e (the slit 13f is not shown in FIGS. 1 to 4). . In addition, about the slit 13f, if the deformation | transformation as the inner shell 13 is promoted, the shape, position, and whether or not the slit 13f is provided in all the band members 13A (in other words, the degree of installation) are aspects in this embodiment. In the first place, the provision of the slit 13f is not an essential requirement of the present invention, and the slit 13f may not be provided at all.

  Specifically, in this embodiment, the slit 13f is provided in a straight line having a constant width in plan view, but the shape of the slit 13f is not limited to a straight line having a constant width, and may be a wavy line. The thickness may be changed, or may be a wedge shape or a circular shape in plan view. Then, by adjusting the width and shape of the slit 13f, an appropriate elastic force as the inner shell 13 can be exhibited, and the elastic force exerted depending on the location of the inner shell 13 can be changed. it can.

  In this embodiment, the slit 13f is provided on the front side of the band member 13A. However, the position where the slit 13f is provided is not limited to the front side, and may be provided on the rear side. It may be provided only on the front side, or may be provided in combination of the front side, the intermediate part, and the rear side. Furthermore, the position where the slit 13f is provided may be changed by the band member 13A. Then, by adjusting the position where the slit 13f is provided, an appropriate elastic force as the inner shell 13 can be exhibited, and the elastic force exerted depending on the location of the inner shell 13 can be changed. .

  In the present embodiment, the slits 13f are provided in all the band members 13A. However, the slits 13f may be provided only in a part of the plurality of band members 13A. Further, the slits 13f may not be provided in any of the band members 13A, that is, may not be provided at all. By adjusting the number of slits 13f (the degree of installation), an appropriate elastic force as the inner shell 13 can be exerted, and the elastic force exerted depending on the location of the inner shell 13 can be exhibited. Can be changed.

  Further, when the inner shell 13 is constituted by a plurality of band members 13A as in the present embodiment, the elastic force (hardness) is changed by changing the material by the band members 13A, or the way of providing the slits 13f is changed. Thus, the bending method may be changed depending on the location of the inner shell 13. Specifically, for example, the center portion of the inner shell 13 may be softened while the left and right side portions may be softened. In this way, when sitting in a normal posture, it will bend enough to ensure good sitting comfort, and when tilted left and right, the seated person's buttocks will be firmly supported and the posture will collapse Can be prevented.

  In the present embodiment, the band members 13A are arranged side by side with a gap 14 provided between the adjacent band members 13A. The width of the gap 14 between the band members 13A is not limited to a specific width, and the adjacent band members 13A may be brought into contact with each other with the gap 14 being zero.

  By configuring the inner shell 13 with a plurality of band members 13A as in the present embodiment, when the seated person sits on the seat portion 10, the plurality of band members 13A are each flexed and deformed independently. Therefore, it is possible to realize a deformation with less restrictions and a high degree of freedom, and the fit between the seated person's buttocks and the seat 10 is further improved.

  In the present embodiment, an air bag as the bending adjustment member 16 is disposed in the bending space 15. In other words, the bending adjustment member 16 enters the bending space 15 which is a space into which the bending portion 13e of the inner shell 13 having a three-dimensional structure is bent by entering the front bending portion 13a and the rear bending portion 13b which are three-dimensional support portions. Is arranged. The bending adjusting member 16 is attached to the base member 11 of the seat below the bending portion 13e of the inner shell 13 (band member 13A), and is for adjusting the amount of bending of the bending portion 13e.

  The bending adjustment member 16 has elasticity and is located below the bending portion 13e of the inner shell 13 and is interposed between the base member 11 of the seat and can adjust the bending amount of the bending portion 13e of the inner shell 13. If so, it is not limited to the air bag as in the present embodiment, but may be a bag filled with other gas or liquid, a spring, or a cushion.

  In addition, the bending adjustment member 16 is formed in a bag shape, and the volume and elastic force (hardness) can be adjusted by taking in and out the gas and liquid inside by a seated person's intentional operation, so that the bending portion 13e can be adjusted. You may enable it to adjust the amount of bending. Further, by moving the deflection adjusting member 16 in the vertical direction by interposing a vertical movement mechanism under the deflection adjusting member 16, the vertical positional relationship (vertical direction distance) with the inner shell 13 can be changed and the bending portion 13e can be changed. You may enable it to adjust the amount of bending. Of course, the volume and elastic force (hardness) of the deflection adjusting member 16 can be adjusted and the vertical position can be changed.

  Although not shown in FIGS. 1 to 4, the surface of the inner shell 13 may be covered with a skin material (tension), or a cushion material may be provided between the inner shell 13 and the skin material. May be.

  Further, when the inner shell 13 is constituted by a plurality of band members 13A arranged side by side with a gap 14 as in the present embodiment, the gap 14 portion may be closed with a film-like member.

  According to the seat of the chair of the present invention configured as described above, the bending amount of the bending portion 13e of the inner shell 13 is adjusted by the bending adjustment member 16. The seat 10 can be adjusted according to the preference of the seated person, such as being harder or softer, or depending on the usage situation, such as being harder during work but softer during breaks. it can.

  Further, as in the above-described embodiment, the inner shell 13 has a three-dimensional structure provided with the three-dimensional support portions 13a and 13b at both the front and rear end portions, and the space into which the bending portion 13e of the inner shell 13 is bent, that is, the bending space 15 is entered. If the bend adjusting member 16 is arranged on the inner shell, the chair seat of the present invention having the bend adjusting member below the inner shell can be realized with a simple structure. It is possible to improve the versatility.

  Furthermore, if the inner shell 13 is configured by arranging a plurality of band members 13A side by side as in the above-described embodiment, the plurality of band members 13A arranged side by side are each flexibly deformed. Since it will support the buttock of the seated person, the seating surface can be finely deformed according to the shape and movement of the seated person's buttocks, and the seat fit is improved by dramatically improving the fit of the buttocks It is possible to realize a special sitting comfort. Further, by arranging the belt members 13A constituting the inner shell 13 at an interval, the air permeability can be improved as compared with the case where the inner shell is constituted by one member, so that the seat portion can be prevented from being stuffy. It becomes possible to improve comfort.

  In addition, although the above-mentioned form is an example of the suitable form of this invention, it is not limited to this, A various deformation | transformation implementation is possible in the range which does not deviate from the summary of this invention. For example, in the above-described embodiment, the case where the seat structure of the present invention is applied to the chair 20 whose overall structure is shown in FIGS. 1 to 4 has been described as an example. However, the seat structure of the present invention can be applied. The chair is not limited to the chair 20 and may be any chair as long as it can adopt a configuration corresponding to the base member 11 and the inner shell 13 of the seat of the above-described embodiment. Specifically, for example, a chair without a backrest, a so-called pipe chair, a so-called round chair, or a bench may be used.

  In the above-described embodiment, the inner shell 13 is configured by arranging a plurality of band members 13A side by side. However, the inner shell 13 in the present invention is not limited to this aspect, and is formed of a single member. The inner shell 13 may be configured. When the inner shell 13 is formed of a single member, the way of bending may be changed depending on the location of the inner shell 13 by changing the way of providing the slits 13f.

  Further, in the above-described embodiment, the front end portion and the rear end portion of the belt member 13A are folded back downward, and the three-dimensional support portion is formed in a lateral U shape in a side view as the front curved portion 13a and the rear curved portion 13b. (Refer to FIG. 8A), the three-dimensional support portion in the present invention is a rotation fulcrum that allows bending rotation (in other words, rotation about the horizontal axis as a rotation axis) so as to promote the bending of the inner shell 13, and the front and rear As long as it functions as a movable fulcrum that allows movement in the direction and supports the front end / rear end of the bent portion 13e of the inner shell 13, it is not limited to this mode, and the downward inclined portion 13g is used. Alternatively, the bent portion 13h may be formed downward (see FIG. 8C; the deflection adjusting member 16 is not shown in FIG. 8). Also in these aspects, the front end and the rear end of the bending portion 13e can be supported by a fulcrum that can be bent and rotated and moved back and forth. 8B and 8C, the front end portion of the band member 13A is a curved portion 13a and the rear end portion is an inclined portion 13g or a bent portion 13h. However, the front end portion is an inclined portion or The bent portion and the rear end portion may be the curved portion 13b, or both the front end portion and the rear end portion may be the inclined portion or the bent portion.

  Furthermore, in the above-described embodiment, the curved portions 13a and 13b as the three-dimensional support portions are formed on both the front end portion and the rear end portion of the band member 13A, but the three-dimensional support portions are formed. Only one of the front end portion and the rear end portion of the band member 13A may be used. That is, as shown in FIG. 9, the curved portion 13a may be formed at the front end portion of the band member 13A, while the curved portion (or the inclined portion or the bent portion) may not be formed at the rear end portion. . In this case, as shown in FIG. 5A, the support protrusion 11a is provided at the rear end edge of the seat base member 11, and the rear end 13d of the belt member 13A is provided on the support protrusion 11a. The rear end 13d of the belt member 13A may be attached to the base member 11 of the seat without providing a support convex portion as shown in FIG. In the case of the structure shown in FIG. 9B, the bending portion 13e of the band member 13A may be made horizontal by tilting the base member 11 of the seat forward while attached to the leg column 21a. good. In these cases, the rear end of the bending portion 13e of the band member 13A is allowed to rotate while being restricted in movement in the front-rear direction, but the front end of the bending portion 13e of the band member 13A is allowed to be bent and rotated. Therefore, the same operational effects as those of the above-described embodiment can be realized.

  In the above description, it is assumed that the inner shell 13 is constituted by a plurality of band members 13A as in the above-described embodiment. However, when the inner shell 13 is constituted by one member, the one member A three-dimensional support part may be formed on both the front end part and the rear end part, a three-dimensional support part may be formed only on the front end part, or a three-dimensional support part is formed only on the rear end part. You may make it do.

  Further, when the inner shell 13 is constituted by a single member, the three-dimensional support portion may be formed continuously over the entire front end portion and rear end portion, or one of the front end portion and rear end portion. One or a plurality of three-dimensional support portions may be formed in the portion.

  In the above-described embodiment, the longitudinal direction of each band member 13A is aligned with the front-rear direction and the plurality of band members 13A are arranged side by side in the left-right direction. However, the inner shell 13 is composed of a plurality of band members 13A. In this case, the arrangement mode of the band member 13A is not limited to this mode, and the longitudinal direction of each band member 13A is aligned with the left-right direction and a plurality of band members 13A are arranged side by side in the front-rear direction. May be. In this case, a three-dimensional support portion is formed on both the left end portion and the right end portion of the inner shell 13. As described above, when the three-dimensional support portions are arranged not on the front and rear sides but on the left and right sides, forming the three-dimensional support portions on both the left end portion and the right end portion also means that the inner shell 13 is configured as a single member. It is the same.

  In the above-described embodiment, the inner shell 13 (the band member 13A constituting the inner shell 13) and the seat base member 11 are formed as separate members, but the inner shell 13 and the seat base member 11 are formed separately. May be molded as a single unit.

  In the above-described embodiment, the seat base member 11 has a plate shape, but the seat base member 11 may have at least a portion to which the inner shell 13 is attached, such as a frame shape, a pair of front and rear, or a pair of left and right rails.

  Moreover, although the above-mentioned embodiment mainly demonstrated the example premised on the case where the shell bending adjustment mechanism by this invention is applied to the seat of a chair, the application object of the shell bending adjustment mechanism by this invention is limited to the seat of a chair. It can be applied to the back of the chair. When applied to the back of a chair, for example, the base member 11 of the seat in the above-described embodiment is considered to replace the back base member 23, and the inner shell 13 is attached to the back base member 23 to attach the inner shell 13 to the back. The structure of the present invention is used as In this case, a three-dimensional support portion is provided on both the upper end portion and the lower end portion of the inner shell incorporated in the back portion, or a three-dimensional support portion is provided on either the upper end portion or the lower end portion. Or a three-dimensional support portion is provided on both the left end portion and the right end portion. Further, the deflection adjusting member 16 is disposed between the back inner shell and the back base member 23 (that is, behind the back inner shell) (attached to the back base member 23). In the above-described embodiment, the spine base member 23 has a plate shape. However, the spine base member 23 may have at least a portion to which the inner shell is attached, such as a frame shape, a pair of front and rear, or a pair of left and right rails.

  And as a chair of this invention, either one or both of the seat of the above-mentioned chair and the back of a chair are provided. As described above, since the amount of bending of the bending portion of the inner shell is adjusted by providing the bending adjusting member 16, for example, the characteristics of the seated person such as the weight of the weight, and the seat portion and the back portion are stiff. The amount of bending of the seat and back can be adjusted according to the preference of the seated person, such as good or soft, and the use situation that the harder is better during work but softer during breaks.

  In the above-described embodiment, the three-dimensional support portions (13a, 13b) are provided at the front and rear end portions of the inner shell 13 (the belt member 13A constituting the inner shell 13), but the three-dimensional support portions (13a, 13b) are provided at the end portions. ) May not be provided. That is, the inner shell 13 may have a flat plate shape.

DESCRIPTION OF SYMBOLS 10 Seat part 11 Base member 13 of seat Inner shell 13A Band member 13a Front side curved part (three-dimensional support part)
13b Rear curved part (three-dimensional support part)
16 Deflection adjustment member

Claims (7)

A plurality of belts each having a resin inner shell and a base member of a seat to which the inner shell is attached, the inner shells being arranged side by side in the left-right direction and the longitudinal direction of each of the inner shells being along the front-rear direction The belt member has a front curved portion and a rear curved portion formed by folding the front end portion and the rear end portion downward, respectively, and is folded downward to form the front curved portion. A front end and a rear end of the inner shell, which are positioned below a portion between the rear curved portion, are attached to the base member of the seat, and between the inner shell and the base member of the seat. A chair seat characterized in that a bending space for bending the inner shell is formed, and a bending adjusting member is provided in the bending space. A plurality of belts each having a resin inner shell and a base member of a seat to which the inner shell is attached, the inner shells being arranged side by side in the front-rear direction and the longitudinal direction of each of the inner shells being along the left-right direction The band member has a left curved portion and a right curved portion formed by folding the left end portion and the right end portion downward, respectively, and the left curved portion and the right curved portion by being folded downward. A left end and a right end of the inner shell, which are positioned below a portion between the curved portions, are attached to a base member of the seat, and the inner shell is interposed between the inner shell and the base member of the seat. A chair seat characterized in that a bending space for bending is formed, and a bending adjusting member is provided in the bending space. A plurality of belts each having a resin inner shell and a back base member to which the inner shell is attached, the inner shells being arranged side by side in the left-right direction while the longitudinal direction of each of the inner shells is along the vertical direction; The belt member has an upper curved portion and a lower curved portion formed by folding the upper end portion and the lower end portion rearward, respectively. An upper end and a lower end of the inner shell, which are located behind a portion between the lower curved portion, are attached to the back base member, and the inner shell is interposed between the inner shell and the back base member. A back of a chair, wherein a bending space for bending the shell is formed, and a bending adjusting member is provided in the bending space. A plurality of belts each having a resin inner shell and a back base member to which the inner shell is attached, the inner shells being arranged side by side in the vertical direction and the longitudinal direction of each of the inner shells being along the horizontal direction And the belt member has a left curved portion and a right curved portion formed by folding the left end portion and the right end portion rearward, respectively, and the left curved portion and the right side portion are folded back. A left end and a right end of the inner shell, which are positioned behind a portion between the curved portions, are attached to the back base member, and the inner shell is interposed between the inner shell and the back base member. A back of a chair, wherein a bending space for bending is formed, and a bending adjusting member is provided in the bending space. The bending adjustment member is formed in a bag shape, and the volume or the elastic force is changed by taking in or out a gas or a liquid, according to any one of claims 1 to 4. Chair seat or chair back as described. The chair seat or chair back according to any one of claims 1 to 4, wherein a slit is formed in at least a part of the plurality of belt members . A chair comprising at least one of the seat of the chair according to any one of claims 1 to 6 and the back of the chair.

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