JP2008119410A - Chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve an effective structure making a lumbar support body part reserve soft movability even if the body part is integrally formed with a support part. <P>SOLUTION: Two positions of the lumbar support body part 31 for resting the waist of an occupant are backed up by a back frame 1 via the support part 32 integrally formed with the body part 31. Right and left grooves 3x are provided between the parts 31 and 32 in each of two positions. Contrarily expanding/contracting each groove 3x is able to swing the body part 31. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a chair provided with a lumbar support that is preferably used in an office or the like.

The lumbar support is extremely effective in reducing the load by supporting the waist of the seated person. In a conventional chair, for example, as shown in Patent Document 1 or the like, it is usually attached to a back plate or the like so that the height can be adjusted. In this case, in order to cope with a change in the pressure receiving direction from the seated person, a support mechanism for making the lumbar support movable is attached to a support portion such as a back plate, and the lumbar support is movably supported by this support mechanism. It is customary.
JP2006-110014

  However, in this case, the lumbar support and the support portion must be separated, and a support mechanism is also required separately, leading to an increase in cost.

  The present invention can be particularly preferably applied to such a case, and even if the lumbar support main body portion and the support portion are integrally formed, an effective structure for retaining flexible mobility in the lumbar support main body portion will be realized. It is what.

  In order to achieve this object, the present invention takes the following measures.

  That is, in the present invention, the pressure receiving portion that receives the load of the seated person is integrated with the pressure receiving portion, and two places of the pressure receiving portion are backed up to the chair body via the support portion. In this embodiment, a groove is provided between the pressure receiving portion and the support portion, and the pressure receiving portion can be swung or translated while the pair of grooves are scaled back and forth.

With this configuration, the pressure receiving portion can be made movable even if the pressure receiving portion and the support portion are integrally formed. Therefore, the manufacturing cost can be effectively reduced as compared with the case where the pressure receiving portion and the support mechanism are additionally provided. It is possible to effectively cope with a change in the pressure receiving direction while being planned. In addition, the structure is very simple because it is simply provided and expanded and contracted. At that time, the pair of grooves are subjected to a contradictory or simultaneous expansion and contraction operation. The stability of seating is not impaired.

In order to smoothen the expansion / contraction operation of the groove, it is desirable that the support portion is capable of elastic displacement or elastic deformation so as to promote the expansion / contraction operation of the groove.

  As a specific aspect of the present invention, a lumbar support main body part that receives a lumbar part of a seated person is integrated with the lumbar support main body part, and two places of the lumbar support main body part are backed up via a support part. In such a case, a groove is provided between the lumbar support main body portion and the support portion at the two locations or in the vicinity thereof, and the lumbar support portion can be swung or translated while being scaled back and forth. What is necessary is just to comprise.

In particular, for a structure in which the support portion protrudes outward from the outer edge of the lumbar support main body portion at two locations on both sides of the lumbar support main body portion, it is possible to effectively configure grooves at the two locations. it can.

In order to enhance the swing function by the groove, the support part is connected to the lumbar support body part at a position that is closer to the center than the outer edge of the lumbar support body part, and the groove is correspondingly displaced to the center side. It is desirable that

In particular, when the support part is connected to the left and right back frames that extend from the lumbar support main body part and the tip constitutes the back, the place where the swing function is brought in is limited, so the present invention is applied. This is particularly effective.

In order to effectively exhibit the action of the groove, it is preferable that the support portion is elastically deformable or elastically deformable so as to promote the expansion / contraction operation of the groove.

Alternatively, the base end of the support portion wraps around the back of the lumbar support main body portion and is connected to the lumbar support main body portion via the vertical rib, and the groove having the vertical rib as the groove bottom is displaced or deformed. It is more effective to configure so as to promote expansion / contraction.

In order to make effective use of such grooves, it is advantageous to cover the lumbar support main body with a skin material and accommodate the opening edge of the skin material in the groove.

In order to provide such a function as a single lumbar support, it is preferable to integrally provide the lumbar support main body portion and the support portion with resin including the groove, and form a back mounting portion on the support portion.

As another specific aspect of the present invention, a back support surface that supports the back of a seated person is integrated with the back support surface, and two portions of the back support surface are backed up to the chair body via the support portion. In such a case, grooves are provided between the back support surface and the support portion, and the back support surface can be swung or translated while the grooves are reciprocally or simultaneously expanded or contracted. Can be mentioned.

Alternatively, a seat support surface that supports a seated person's buttocks is integrated with the seat support surface, and two portions of the seat support surface are backed up to the chair body via the support portion. There is a configuration in which grooves are provided between the portions, and the seat support surface can be swung or translated while expanding or contracting these grooves in a contradictory or simultaneous manner.

  Since the present invention has the configuration described above, for example, when the pressure receiving portion is a lumbar support main body portion, even if the lumbar support main body portion and the support portion are formed integrally, the lumbar support main body portion retains flexible mobility. Therefore, the lumbar support function can be effectively enhanced while avoiding an increase in cost due to a simple structure. Such an effect can be obtained in the same manner even when the pressure receiving portion is a seat support surface or a back support surface.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the chair of this embodiment is provided with a groove 1 a on the outer periphery of the back frame 1 to attach a tension material 2 made of mesh ground, and a lumbar support 3 is bridged over the back frame 1. It will be.

  The back frame 1 is formed by resin molding, and has two grooves 1x and 1y as shown in FIG. 3 at the outer edge thereof, which are continuous over at least the upper side 11 and the side 12 of FIG. The edge portion 3a of the tension member 3 is inserted into the groove 1x to be attached, and an optional member such as a headrest or a hanger can be attached without interfering with the tension member 3 by using the groove 1y located at the rear. The upholstery material 3 is supported in close contact with the front surface of the back frame 1 near the groove 1x of the back frame 1, and the front surface of the back frame 1 gradually moves away from the upholstery material 3 as it approaches the center of the back from there. The curved surface 1z is curved, and when a load is applied to the tension member 3, the tension member 3 is bent to gradually increase the contact area with the curved surface 1z.

As shown in FIGS. 2 and 4, a raised portion 4 is integrally provided on the front surface of the back frame 1 in the vicinity of the height of the waist of the seated person, and the left and right end portions 3 a of the lumbar support 3 are supported by the raised portion 4. I am letting.

The raised portion 4 is a block-like member that protrudes in the direction of receiving a load and compensates for the thickness of the back frame 1, and is provided with a groove 41 that is a concave portion extending in the vertical direction on the front surface 4 a. A hole 42 is opened.

On the other hand, as shown in FIGS. 5 and 6, the lumbar support 3 is formed by integrally forming a pair of thin plate-like support portions 32 on both sides of the lumbar support main body portion 31 by resin molding. The protrusion 3b provided on the rear surface of the end portion 3a is inserted into the groove 41 of the raised portion 4 shown in FIG. 4 so as to be vertically slidable from the front. Then, a cover 5 for retaining is attached from above. The cover 5 has convex portions 52 at two upper and lower portions on the rear surface of the plate material 51, and the convex portions 52 are closely pressed into the holes 42 of the raised portion 4. A clearance corresponding to at least the thickness of the support portion 32 of the lumbar support 3 is secured between the front surface 4a of the lumbar support 3 and the support portion 32 can be smoothly moved up and down. When the lumbar support 3 receives pressure, the protrusion 3b provided on the end 3a of the support portion 3 supports the load in a state in which the protrusion 3b is pressed against an appropriate portion of the inner wall of the groove 41 in a direction substantially perpendicular to the load. . This raised portion 4 including the cover 5 is disposed between the curved surface 1z of the back frame 1 shown in FIG.

  As shown in FIGS. 5 to 7, the lumbar support main body portion 31 has a support surface 31 a that is curved so as to have a concave shape corresponding to the waist portion on the front surface, and a base of the support portion 32 on the back surface through vertical ribs 31 b. The end is continuously provided, and the support surface 31 a is slightly protruded from the front surface of the support portion 32. A groove 3x that opens outward is formed in a U-shaped portion (see FIG. 8) in plan view that extends from the vicinity of the edge in the width direction of the support surface 31a to the support portion 32 through the vertical rib 31b. The above-described vertical rib 31b is located at a position closer to the center than the outer edge 31s in the width direction of the lumbar support main body 31, and the groove 3x is displaced to the center correspondingly. A boss hole 31c protrudes toward the rear at the center of the support surface 31a of the lumbar support main body 31, and the tip 31d1 is folded at an appropriate position inside the vertical rib 31b after being pushed back toward the rear. A claw 31d facing forward is provided. A wall 31f that forms a recess 31e between the vertical rib 31b and a slight clearance is disposed further inside the claw 31d.

  The support portion 32 extends from the outer edge 31s in the width direction of the lumbar support main body portion 31 while being curved so as to be concave toward the front, and the front end 3a is the front surface of the vertical side 12 of the back frame 1 described above. The above-mentioned backward projection 3b is formed at the tip. The support portion 32 can be displaced or deformed by elasticity when the lumbar support main body portion 31 receives pressure.

  In addition, a cover 33 is attached to the lumbar support main body 31 at a position where the rear surface is sealed. The cover 33 has a face plate portion 33a at a position facing the support surface 31a of the lumbar support main body portion 31, and the face plate portion 33a is curved so as to be gently convex rearward. A boss 33c corresponding to the boss hole 31c of the lumbar support main body 31 is provided at the center of the face plate 33a, and a claw 33d corresponding to the claw 31d of the lumbar support main body 31 is provided in the vicinity of the widthwise edge 33s. Is provided. The tip 33d1 of the claw 33d faces rearward as opposed to the claw 31d.

  8-10, the cover 33 is inserted into the lumbar support main body 31, the boss 33c is inserted into the boss hole 31c, and the tip 33d1 of the claw 33d is inserted into the claw 31d1 in the recess 31e. I try to wear it in conjunction with. These claws 31d and 33d are easily elastically deformed when engaged, but have a deeper relationship with the external force in the removal direction due to the back-up of the longitudinal rib 31b and the wall 31f. In FIG. 10, what is indicated by reference numeral 33d2 is a window for inserting a tool to deform the claw 31d, thereby releasing the claws 31d and 33d. Claws 31g and 33g having the same relationship as described above are also provided near the upper and lower edges. Therefore, even if the engaging portions of the claws 31d and 33d or 31g and 33g are twisted by pressure, the lumbar support main body 31 and the cover 33 are difficult to disengage unless intentionally removed.

In this state, as shown in FIG. 8, a gap 3y that opens outward is formed between the width direction edge portion 33s of the face plate portion 33a of the cover 33 and the support portion 32, and as shown in FIG. Further, a gap 3z is formed between the vertical edge portion 33t of the face plate portion 33a and the vertical edge portion 31t of the lumbar support main body portion 31, and in particular, a region protruding from the support portion 32, that is, The gap 3z formed at the position where the lumbar support main body 31 and the cover 33 directly face each other is not only continuous with the groove 3y formed between the cover 33 and the support 32, but also with the support 32. It is also continuous with the groove 3x formed between the lumbar support main body 31. That is, the grooves 3x and 3z form a circumferential groove almost along the outer periphery of the lumbar support main body 3, and the grooves 3y and 3z also form a circumferential groove almost along the outer periphery of the cover 33. It has become.

Then, as shown in FIG. 10, the cushion material 34 is applied to the front surface of the lumbar support main body 31 and wrapped with the skin material 35, and the core material 36 is applied to the rear surface of the cover 33 to cover these with the skin material. 37. The cushion material 34 is made of a material such as urethane provided so as to give an appropriate elasticity to the lumbar support main body 31, and has a shape substantially corresponding to the support surface 31 a of the lumbar support main body 31. Then, the skin material 35 is made into a crisp shape with a string 35a attached by sewing around it, covering the cushion material 34 and the lumbar support main body 31 from the inner opening edge 35b side, and the string 35a at that position. The opening edge 35b is accommodated in the groove 3x shown in FIG. 8 and the gap 3z shown in FIG. 9 together with the string 35a. Further, the core material 36 has a shape substantially corresponding to the cushion material 34 and is designed to make the lumbar support 3 look almost the same in the front-rear direction, and is made of a material such as urethane. . Then, the skin material 37 is made into a crisp shape with a string 37a attached to the periphery by sewing, and the core material 36 and the cover 33 are covered from the inner opening edge 37b side, and the string 37a is squeezed at that position. Thus, the opening edge 37b is accommodated in the gap 3y shown in FIG. 8 and the gap 3z shown in FIG. 9 together with the string 37a.

  FIG. 11 is a diagram showing a completed state of the lumbar support 3.

  In particular, the groove 3x is not only useful for accommodating and concealing the opening edge 35b of the skin material 35 together with the string 35a in cooperation with the gaps 3y and 3z, but also enhances the following lumbar support function. It also works.

That is, the lumbar support 3 is connected to the lumbar support main body 31 via the vertical rib 31b from the position where the base end 32a of the support 32 wraps behind the lumbar support main body 31 as shown in FIG. In addition, when the load W1 is applied from the front as shown in FIG. 12 (a), the support portion 32 is formed in a belt shape having elasticity, as shown in FIG. 12 (b). As described above, the groove 3x between the lumbar support main body portion 31 and the support portion 32 having the vertical rib 31b as the groove bottom is simultaneously displaced and deformed together with the support portion 32, and the pressure receiving position moves in parallel and retracts. For this reason, a moderate cushioning action is performed at the time of sitting, and the function which gives a soft drenching feeling is exhibited.

Further, when the base end 32a of the support portion 32 wraps behind the lumbar support main body portion 3 and is connected to the lumbar support main body portion 31 through the vertical ribs 31b, the support portion 32 has a belt shape having elasticity. As shown in FIG. 13, when a load W2 is applied from an oblique direction as shown in FIG. 13, the left and right vertical ribs 31b are appropriately displaced or deformed together with the support portion 32 according to the load direction. While the left and right grooves 3x are scaled back and forth, the lumbar support main body 31 is swung to take a posture suitable for the load direction.

As described above, in the chair of this embodiment, the lumbar support main body 31 that receives the lumbar part of the seated person is integrated with the lumbar support main body 31 and the two portions of the lumbar support main body 31 are interposed via the support 32. The back frame 1 is backed up. And the groove | channel 3x is provided between the lumbar support main-body part 31 and the support part 32 in the two places, and the lumbar support part 31 is swung or parallel-moved while expanding and contracting these left and right grooves 3x contradictingly or simultaneously. It ’s what you get.

When configured in this way, even if the lumbar support main body 31 and the support portion 32 are made integrally, the lumbar support main body portion 31 can be made movable. It is possible to effectively cope with a change in the pressure receiving direction while effectively reducing the manufacturing cost. In addition, since the groove 3x is simply expanded and contracted, the structure is very simple. In this case, the pair of grooves 3x and 3x perform a contradictory or simultaneous expansion / contraction operation, and thus the sense of stability of seating is impaired due to movement in a disorderly manner. Without a problem, it is possible to demonstrate a stable support function.

In particular, in the chair of the present embodiment, the support portion 32 extends from the lumbar support main body portion 31 and connects the end portion 3a to the left and right back frames 1 constituting the back, and the lumbar support main body portion 31 is connected to the left and right back frames. Since the back-up structure extends over 1, it is possible to easily realize a mode in which the grooves 3x are provided at two locations of the support portion 32 and the lumbar support main body portion 31.

At that time, the support portion 32 is connected to the lumbar support main body portion 31 at a position that is closer to the center than the outer edge 31s of the lumbar support main body portion 31, and the groove 3x is displaced to the center side correspondingly. Therefore, when the distance between the left and right grooves 3x and 3x is reduced, the swinging operation of the lumbar support portion 31 due to the deformation of the groove 3x can be increased, and the change in the pressure receiving direction can be effectively handled.

Specifically, since the support portion 32 can be elastically displaced or elastically deformed so as to promote the expansion / contraction operation of the groove 3x, a stable swinging operation like a seesaw occurs in the lumbar support main body portion 31. Become. Moreover, when the left and right support portions 32 are similarly elastically displaced or elastically deformed by receiving pressure from the front, the cushioning action of the lumbar support main body portion 31 can also be expected, so that the impact when leaning can be effectively mitigated. It becomes.

Further, the base end 32a of the support portion 32 goes around behind the lumbar support main body 31 and continues to the lumbar support main body 31 via the vertical rib 31b. The vertical rib 31b is displaced or deformed while the vertical rib 31b is displaced or deformed. As a result, the lumbar support main body 31 is swung around the vertical rib 31b. When the pressure is received from the front and the left and right vertical ribs 31b are similarly deformed, a parallel movement is caused, and the cushioning action of the lumbar support main body 31 can also be expected here.

Further, since the skin material 35 is covered so as to cover the lumbar support main body portion 31 and the opening edge 35b of the skin material 35 is accommodated in the groove 3x, a groove for changing the posture of the lumbar support portion 31 is provided. It can be used effectively as an attachment place for the skin material 35.

The above functions are provided in the lumbar support 3 alone, in which the lumbar support main body 31 and the support portion 32 are integrally provided with resin including the groove 3x, and the support portion 32 is formed with the attachment portion to the back frame 1. Become.

The specific configuration of each part is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, as shown in FIG. 14, a back support surface 131 that supports the back of a seated person is integrated with the back support surface 131, and two portions of the back support surface 131 are connected to the back frame 101 or the like via a support portion 132. For those backed up by the chair body, a groove 103x is provided between the back support surface 131 and the support portion 132, and the back support surface 131 is laterally necked while expanding or contracting these grooves 103x contradictively or simultaneously. Even if it is configured such that it can be swung or translated, the same effects as described above can be obtained.

Alternatively, as shown in FIG. 15, a seat support surface 231 that supports a seated person's buttocks is integrated with the seat support surface 231, and a seat such as a leg 201 is provided at two locations on the seat support surface 231 via a support portion 232. For those backed up by the main body, grooves 203x are provided between the seat support surface 231 and the support portion 232, and the seat support surface 231 is left and right depending on the purpose while expanding and contracting these grooves 203x in a contradictory manner or simultaneously. Even if it is configured such that it can be swung or translated in the vertical direction or the vertical direction, the same effect as described above can be obtained.

In addition, as shown in FIG. 16, the support portion 32 of the lumbar support 3 is attached so as to be bridged over the groove 1y located on the rear side of the groove 1x into which the upholstery material 2 is inserted among the left and right back frames 1. You may do it. At this time, the support portion 32 of the lumbar support 3 is bridged in a tensioned state, and the groove 1y of the back frame 1 and the support portion 32 of the portion are supported as shown in FIG. It is desirable that the end 3a of the portion 32 has a hook-like hook shape. Even if formed in this way, the lumbar support 3 can be adjusted in the vertical position along the groove 1y. In this case, if a handle is provided at the end 3a of the support portion 32, the lumbar support 3 can be easily adjusted in the vertical position. Furthermore, if the handle is a rib-shaped handle 32r reaching the end 3a of the support portion 32 as shown in FIG. 17, when the seated person puts his / her weight on the lumbar support 3, the support portion 3 It is possible to effectively prevent the vicinity of the nail-shaped end portions 3a from opening and coming off from the groove 1y.

In addition, when high tension is not required for the support portion 32 in order to prevent the end portion 3a of the lumbar support 3 from being detached from the groove 1y, the support portion 32 out of the lumbar support main body portion 31 and to the end portion 3a. By giving a curved shape to every part, even if the interval between the left and right back frames 1 gradually changes so as to increase, for example, upward, it can be absorbed and the lumbar support 3 can be lifted up and down effectively. Can do.

As described above, the present invention can be summarized as follows. In this chair, the pressure receiving portion that receives the load of the seated person is integrated with the pressure receiving portion, and two places of the pressure receiving portion are backed up to the chair body via the support portion. If a groove is provided between the pressure receiving portion and the support portion in the two places or in the vicinity thereof, and the pressure receiving portion can be swung or translated while the pair of grooves are reciprocally or simultaneously expanded and contracted. The same effects as those of the upper air embodiment can be obtained.

In this case as well, the swinging function can be enhanced by making the support portion elastically displaceable or elastically deformable so as to promote the expansion / contraction operation of the groove.

The perspective view of the chair concerning one embodiment of the present invention. The perspective view which partially crushed the lumbar part of the chair. The partial plane sectional view which shows the structure of the back frame part of the chair. The figure which shows the attachment structure to the back frame of the lumbar support in the chair. The diagonal front perspective view which shows the principal part of the lumbar support in an exploded state. FIG. 6 is an oblique rear perspective view corresponding to FIG. 5. FIG. The plane sectional view which the same part fractured. AA line sectional view in FIG. The disassembled perspective view which shows the whole structure of the same lumbar support. The figure which shows the assembly state of the same lumbar support. The operation explanatory view of the lumbar support. The operation explanatory view of the lumbar support. The figure which shows the modification of this invention. The figure which shows the modification of this invention. The figure which shows the modification of this invention. The figure which shows the modification of this invention.

Explanation of symbols

3 ... Lumber support 3x ... Groove 31 ... Lumber support main body 31b ... Vertical rib 32 ... Supporting part

Claims (12)

In the pressure receiving part that receives the load of the seated person, the pressure receiving part is integrated with the pressure receiving part, and two places of the pressure receiving part are backed up to the chair body via the support part.
A groove is provided between the pressure receiving portion and the support portion in the two places or in the vicinity thereof, and the pressure receiving portion can be swung or translated while the pair of grooves are scaled back and forth. Characteristic chair. The chair according to claim 1, wherein the support portion is elastically deformable or elastically deformable so as to promote the expansion / contraction operation of the groove. In the lumbar support main body that receives the lumbar part of the seated person, the lumbar support main body is integrated with the lumbar support main body, and two portions of the lumbar support main body are backed up through the support,
Grooves are provided between the lumbar support main body part and the support part in the two places or in the vicinity thereof, and the lumbar support part can be swung or translated while being expanded or contracted back and forth. A chair characterized by that. The chair according to claim 3, wherein the support part protrudes outwardly from the outer edge of the lumbar support main body part at two locations on both sides of the lumbar support main body part. The chair according to claim 4, wherein the support portion is connected to the lumbar support main body portion at a position where the support portion enters from the center of the outer edge of the lumbar support main body portion, and the groove is correspondingly displaced toward the center side. The chair according to claim 4 or 5, wherein the support part extends from the lumbar support main body part and has a tip connected to left and right back frames constituting the spine. The chair according to claim 6, wherein the support portion is elastically deformable or elastically deformable so as to promote the expansion / contraction operation of the groove. The base end of the support part goes around the back of the lumbar support main body part and is connected to the lumbar support main body part through the vertical rib. The chair according to claim 4, which is urging. The chair according to claim 3-8, wherein a skin material is covered so as to cover the lumbar support main body, and an opening edge of the skin material is accommodated in the groove. The chair according to any one of claims 3 to 9, wherein the lumbar support main body part and the support part are integrally provided with a resin including a groove, and a back attachment part is formed on the support part. Lumber support. The back support surface that supports the back of the seated person is integrated with the back support surface, and the back support surface is backed up to the chair body through the support portion at two locations.
A chair provided with a groove between the back support surface and the support portion, and configured to be able to swing or translate the back support surface while expanding or contracting these grooves in a reverse or simultaneous manner. The seat support surface that supports the seated person's buttocks is integrated with the seat support surface, and two places of the seat support surface are backed up to the chair body via the support portion.
A chair provided with grooves between the seat support surface and the support portion, and configured to swing or translate the seat support surface while expanding or contracting these grooves in a contradictory or simultaneous manner.

Images