JP2006218191A - Chair and auxiliary seat pad of the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chair for spontaneously holding a good posture with a straight back, even if a seated person crosses his/her legs. <P>SOLUTION: The chair is disposed with auxiliary cushion bodies 14 on both sides across a vertical axis 9 of a seat 4 so as to surround the center part of the seat 4. The auxiliary cushion body 14 has a cross-section having a lower inside and a higher outside. The auxiliary cushion bodies 14 form front and back side support portions 11 and 12, and a part surrounded by the right and left side support portions 11 and 12 serve as a center support portion 10 having a substantially flat shape. The floating buttocks of the seated person 16 with his/her legs 17 and 18 crossed is supported by the back side support portions 12, and unsteadiness of the legs 17 and 18 is prevented by the front side support portions 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a chair and an auxiliary pad for the seat.

  There are various types of chairs, and the structure of the seats is also various. For example, in the case of office swivel chairs, many seats have a structure in which a cushion body is stretched on a seat inner shell (seat plate). On the other hand, as is often seen in conference pipe chairs, there are many chairs that are not provided with a cushion and have a seat plate exposed.

The seat of the chair is an important element that receives the human body, and the structure of the seat has a great influence on the sitting comfort. And as one of the improvement proposals regarding the seat, Patent Document 1 discloses an auxiliary cushion on the base cushion body that spreads over the entire surface of the seat as a means for providing an appropriate fit regardless of the user's physique and sitting. The placement of the body is described. More precisely, it is described that the base cushion body and the auxiliary cushion body are laminated along a direction in which a compression load acts when a person uses the body.
JP 2002-45261 A

  By the way, when a person uses a chair, in addition to the posture where the left and right feet are aligned or widened and both feet are put on the floor, the legs of the other leg are put on the knee of one foot. I often take a posture. When people use chairs, they often change their sitting posture, such as aligning their legs, crossing their legs, or recombining their legs, which can be said to promote blood circulation and change their mood. . In many cases, for example, a personal computer operation is performed with the legs crossed.

  Thus, in the case of a posture with both feet on the floor, the human body pressure acts symmetrically with respect to the seating surface, and therefore the human posture is stable without falling to the left or right. .

  On the other hand, when a seated person crosses his / her legs, the body pressure applied to the seating surface becomes asymmetrical and posture stability deteriorates. That is, for example, when the right foot is placed on the left foot, the thigh of the right foot floats from the seat surface, and the right half of the buttocks also floats from the seat surface. Then, although the center of gravity of the upper body does not change, the body can be received mainly by the left half of the seat, and thus the person tends to fall to the right side. When the left foot is placed on the right foot, the person tends to fall to the left side.

  And if you keep your upper body in a straight posture with your legs crossed, your upper body part (especially your abdominal and back muscles) will be in a state of stress, which may cause fatigue and stiff shoulders. , If you work on a computer with the upper body tilted, you will not only give an impression of sloppyness (poor behavior) to others, but it will also cause physical distortion and cause health deterioration. There is a fear.

  The above-mentioned Patent Document 1 is intended to ensure fit even when sitting differently. However, in the auxiliary cushion body of this Patent Document 1, it is possible to sit down deeply on the assumption that both feet are on the floor. You can only secure fit when you sit down shallowly, or sit down by shifting your body in either the left or right direction, and you do not have the function to hold your upper body straight in a state where your legs are crossed I can say that.

  This invention makes it a subject to improve such a present condition.

  The present invention includes a chair and an auxiliary pad for the seat. The invention of claim 1 relates to a chair, and comprises a seat and a backrest, and the seat is provided with auxiliary means for stabilizing the foot posture when a seated person is crossing the foot. .

  The invention of claim 2 further embodies the chair of claim 1, wherein the seat has a structure in which a cushion body is stretched on the upper surface of the seat inner shell, and the seat surface of the seat is in the seat. A center support portion that extends in the front-rear direction along the longitudinal center line and a left and right side support portion that constitutes the auxiliary means located on both the left and right sides of the center support portion.

  The center support portion is substantially horizontal when viewed from the front, or has a shape along an upwardly concave shape in a state close to the horizontal, while the side support portion has a lower portion close to the center support portion and has a center support portion. The portion far from the cross section is an inclined or stepped shape that is high, and the boundary line between the center support part and the side support part is a concave substantially square shape toward the center line in plan view. Yes.

  As means for specifically realizing the side support portion as the auxiliary means, another auxiliary cushion body is laminated on the base cushion body extending over the entire seat, or the upper surface of the base cushion body extending over the entire seat. It is possible to change the profile of the seat or to form a portion corresponding to the side support portion of the seat so as to bend around a boundary portion with the center support portion.

  The invention of claim 3 relates to a pad used for stabilizing a posture in which a seated person crosses his legs. This auxiliary pad is made of a cushion material (that is, a material that is elastically deformed by compression). The part located on the left and right outside of the seat in the front view of the chair is thick and the part located near the left and right middle part of the seat is thin. Are formed with unequal thicknesses.

  According to the first aspect of the present invention, when a person sits on a chair with his / her legs crossed, the posture is stabilized by the assisting means, so that the posture in which the spine is extended can be maintained without difficulty. For this reason, the correct posture can be secured to prevent the body from being distorted, and the other person's eyes can be seen well and the evaluation of the person can be improved.

  Although various modes can be adopted as the auxiliary means of the present invention, it is preferable to provide the side support portion having the form as claimed in claim 2 on the seat. The reason for this is not necessarily clear, but it is understood that the floating part of the buttocks is supported by the rear part of the side support part and that the planar view posture of both feet is stably held by the front part of the side support part. . The detailed operation will be described with reference to the drawings in the description of the embodiments.

  According to the third aspect of the present invention, the use position and the number of use of the auxiliary pad can be selected according to preference and physique. Moreover, it is also excellent in that it can be used in an existing chair and can take a correct posture (for example, it can be used for a conference chair without a cushion body or a round chair without a backrest). . When the auxiliary pad is considered as an accessory of the chair, the auxiliary pad can be regarded as an example of auxiliary means described in claim 1.

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

(1). Structure of First Embodiment FIGS. 1 to 3 show the first embodiment. First, the structure of 1st Embodiment is demonstrated based on FIG.1 and FIG.2. FIG. 1 is a front view of a chair, FIG. 2A is a plan view of the chair, FIG. 1B is a cross-sectional view taken along the line BB of FIG.

  This embodiment is applied to an office swivel chair, which includes a leg 1 having a pedestal (gas cylinder) 1a, a seat 4 supported by the leg 1 via a base 2 and an intermediate fitting 3, and a back. A backrest 6 attached to the base 2 via a frame 5 is provided. The backrest 5 may be tiltable rearward or may not be tiltable rearward. The backrest 6 has a structure in which a cushion body is stretched on a back plate (back inner shell), but since the structure is not related to the present invention, the details are omitted.

  As shown in FIG. 2 (B), the seat 4 includes a seat inner shell (seat plate) 7 made of synthetic resin, a base cushion body 8 extending over the entire upper surface, and a skin material (not shown).

  The upper surface (seat surface) of the seat 4 includes a center support portion 10 that extends in the front-rear direction along the longitudinal center line 9 of the seat 4, and left and right side support portions 11, 12 positioned on the left and right sides of the center support portion 10. It is divided into. The side support part is divided into a front side support part 11 and a rear side support part 12. Each of the side support portions 11 and 12 is formed in a rectangular shape in a plan view. For this reason, a blank portion 13 that is not the side support portions 10 and 11 exists outside the center support portion 9.

  The center support portion 9 has a shape that is substantially horizontal in a front view or warped upward with a very gentle curvature. On the other hand, each side support part 11 and 12 is an inclined surface inclined so that the boundary part with the center support part 9 is low and the height increases as it goes to the left and right outside. Specifically, the maximum height H is preferably about 15 mm.

  Each of the side support portions 11 and 12 is formed in a rectangular shape in plan view, and the front side support portions 11 are arranged in a reverse C shape in plan view so that the distance between the side support portions increases toward the rear. Are arranged in the shape of a plan view that narrows as the distance from each other increases, and the boundary between the group of side support portions 11 and 12 and the center support portion 9 is directed toward the center line 9 of the seat 4. It has a square shape in plan view.

  The maximum width dimension of the center support portion 10 is preferably about half of the width dimension of the seat 4, and the angle θ formed by the inner side surfaces of the side support portions 11 and 12 and the center line may be about 20 to 30 degrees. The front and rear side support parts 11 and 12 may be arranged at the front and rear with the front and rear intermediate part of the seat 4 as a boundary.

  The upper surface of the base cushion body 8 has a shape that is loosely curved (curved) in a horizontal shape or an upwardly concave shape over its entire left and right width. Then, the side support portions 11 and 12 are formed by laminating a separate auxiliary cushion body 14 on the base cushion body 8. The auxiliary cushion bodies 11 and 12 are covered with a skin material together with the base cushion body 8. When the auxiliary cushion bodies 11 and 12 are used as in the present embodiment, the auxiliary cushion body 14 is preferably bonded to the base cushion body 8 with an adhesive or the like. Various materials such as urethane resin can be used as the material of the auxiliary cushion body 14.

  As shown in FIG. 2C, the auxiliary cushion body 16 and the side support portions 11 and 12 may be extended to the periphery of the base cushion body 8 to eliminate the blank portion 13, and the auxiliary cushion body 14 is not used. In addition, as shown in FIG. 2 (D), the side support portions 11 and 12 can be formed by integrally forming an inclined built-up portion 8a on the base cushion body 8.

  When the side support portions 11 and 12 are constituted by the auxiliary cushion body 14, the entire base cushion body 8 is encapsulated with a skin material, and the auxiliary cushion body 14 encapsulated with a dedicated skin material is laminated on the upper surface. It is also possible to do.

(2). Description of Action Next, the function of the side support portions 11 and 12 will be described with reference to FIG. 3A is a plan view, FIG. 3B is a schematic cross-sectional view taken along the line B-B of FIG. 3A, and FIG. 3C is a schematic cross-sectional view taken along the line C-C of FIG. In FIG. 3A, the seated person 16 is roughly shown by a one-dot chain line (see also FIG. 1). The person 16 puts the left foot 17 on the floor and puts the right foot 18 on the left foot 17. Therefore, the right side portion 19a of the collar portion 19 floats from the seat surface.

  In FIG. 3A, reference numeral 20 denotes a center point of foot movement (sciatic bone portion), and reference numeral 21 denotes a center point of the kneecap. The line indicated by the thick dotted line indicates the planar view posture of the foot with both feet on the floor.

  In the state where the seated person 16 does not assemble the legs 17 and 18 as indicated by the thick dotted line, the body pressure of the person is applied symmetrically with respect to the seat 4. In this state, the heel part 19 of the person 16 is placed on the rear side support part 12, but the heel part is dull and the load on the left and right rear side support parts 12 is evenly applied. If the maximum height of the side support part 12 is about 15 mm, the human heel part 19 will not receive a push-up feeling by the rear side support part 12.

  On the other hand, in the state where the person does not assemble the legs 17 and 18, the legs are often pulled, and both the legs 17 and 18 are not loaded. The lower surfaces of the thighs of the feet 17 and 18 often float from the seating surface. Therefore, even if the front side support part 11 is present, the human thigh is not subjected to a push-up feeling by the front side support part 11.

  After all, in the state where the legs are not crossed, even if the side support portions 11 and 12 exist, if the maximum height is about 15 mm to 20 mm, the buttocks and thighs of the person 16 do not receive a feeling of pushing up. . In other words, it can be said that the seating comfort is not lowered by providing the side support portions 11 and 12.

  On the other hand, when the person 16 assembles the legs 17 and 18, the height of the buttocks surface changes from left to right in the buttocks 19, and in the case of FIG. 3, the port side 19 a becomes high (floats) and the starboard part 19 b becomes low. When the starboard portion 19b is lowered, the starboard portion 19b sinks deeply into the rear side support portion 12 (and the base cushion body 8) (the load on the upper body of the person 16 is concentrated on the starboard portion 19b. As shown by the dotted line in (B), it sinks deeper than the seated state without legs crossed).

  Thus, when the starboard part (19b) sinks, the relative height of the starboard part 19a and the rear side support part 12 does not change so much. In combination with this, the port part 19a is floated in the first place and can be stably held without applying a strong supporting force, and the port part 19a is stably supported by the rear side support part 12. .

  Next, the relationship between the front side support part 11 and the legs 17 and 18 will be described. Now, when a person assembles the legs 17 and 18, the upper and lower legs 17 and 18 are crossed in the vicinity of the kneecap in a plan view, and therefore both the legs 17 and 18 are in a plan view with respect to the center line 9 of the seat 4. Inclined and extended in the crossing direction.

  On the other hand, in the natural state in which a person is seated, the legs 17 and 18 are slightly open, so the lower leg (the right leg 18) with the legs 17 and 18 assembled is the posture shown by the dotted line in FIG. Since the person is in an unstable state where only the lower leg (right leg 18) is on the floor, the lower leg (left leg 17) tends to return to the posture shown by a dotted line. As the instability of the lower limbs spreads to the upper body, the upper body becomes easier to tilt in the legged posture.

  On the other hand, in the case of the present embodiment, the lower foot (right foot 18) is prevented by the front side support portion 11 from returning to the dotted line posture and becoming free. ) Is in a state as if fixed to the seat 4, and as a result, posture stability can be remarkably improved.

  Furthermore, when a person assembles his / her legs, the lower leg (right leg 18) is extended with the shin extended so that the lower leg is as low as possible to make it easier to assemble the leg. For this reason, the outer part of the lower leg (right leg 18) of the thigh of the lower leg (right leg 18) hits the front side support part 11 strongly, so that the front side support part 11 becomes lower leg. As a result, the posture stability of both feet 17 and 18 is remarkably improved.

  As described above, when the rear side support portion 12 supports the lifting of the heel portion 19 and the front side support portion 12 maintains the left and right feet 17 and 18 in a plan view posture, the seated person extends his back. You can continue to hold your posture comfortably.

  By the way, the left and right intermediate portions of the base cushion 8 of the seat 4 are easily compressed and deformed, but the left and right end portions are often difficult to compress and deform by being pulled by the skin material. For this reason, when the person who sat down crosses a leg, it becomes difficult to support floating of a thigh or a buttocks. On the other hand, since the side support portions 11 and 12 of the present embodiment are greatly compressed and deformed, it can be said that the posture of the person can be maintained by reliably supporting the lifting of the buttocks and thighs. The left and right rear side support portions 12 may be arranged in parallel.

(3). Second embodiment (FIG. 4)
FIG. 4 shows a second embodiment. In this embodiment, the side support parts 11 and 12 are formed so as to cover all the parts except the center support part 10. Further, the boundary portion between the rear side support portion 12 and the center support portion 10 is formed in a curved curve that is gently curved concavely toward the center line 9 (according to the curve of the collar portion). Also in this case, the side support part 11 may be separate from the base cushion body 8 or may be integrated.

(4) Third embodiment (FIG. 5)
FIG. 6 shows a third embodiment. In this embodiment, the center support portion 10 is embodied, (A) is a sectional view, and (B) is a partial plan view. In this embodiment, the base cushion body 8 and the whole are covered with a skin material (not shown), and an auxiliary pad (which may be called an auxiliary cushion body) 22 that is completely separated from the seat 4 is used. The

  The user can achieve stability of the buttocks and the thighs by interposing the auxiliary pad 22 between the thighs and the seating surface between the buttocks and the seating surface. The auxiliary pad 22 is formed so that the portion of the seat 4 facing the center line 9 is thin. However, it is sufficient if the auxiliary pad 22 has a flat shape as a whole. In order to prevent the auxiliary pad 22 from shifting, it is possible to provide holding means such as a double-sided fastener. It is possible to prepare a plurality of types having different thicknesses, areas, shapes, colors, etc., and use them according to the user's preference.

(5). Fourth embodiment (FIGS. 6 to 7)
6 and 7 show a fourth embodiment. FIG. 6 is a longitudinal front view of the main part, and FIG. 7 is a plan view of the seat inner shell 7. In this embodiment, by deforming the seat 4, the side support portions 11 and 12 appear only when the foot posture is taken. In order to make it possible to form the side support portions 11 and 12 by deforming the seat 4, a group of slits 23 is formed in a portion of the seat inner shell 7 that surrounds the side support portions 11 and 12. The peripheral edge of the seat inner shell 7 is supported by an outer support 26.

  Needless to say, the side support parts 11 and 12 are bent with a boundary part with the center support part 10 as a crease. As a means for bending the portion corresponding to each side support portion 11, 12 of the seat inner shell 7, a circumferential cam 24 is employed. Each cam 24 is fixed to the rotating shaft 25 so as not to rotate relative to the rotating shaft 25. When the rotating shaft 25 is rotated by a lever or handle (not shown), the cams 24 rotate at the same time and the side support portions 11 and 12 are present. It switches to the state that is not.

  Needless to say, the means for deforming the seat 4 is not limited to the use of the cam 24, and other adjusters may be used. Further, an adjusting tool such as a cam can be driven by a gas cylinder.

(6). Fifth embodiment (FIG. 8)
FIG. 8 shows a fifth embodiment in which the auxiliary cushion body 14 or the auxiliary pad 22 is formed in a stepped cross section. The whole shown in (A) is integrally formed, and the one shown in (B) is formed by laminating and fixing a plurality of plate-like materials. In (B), there exists an advantage which can manufacture what differs in thickness and a shape from a single plate-shaped raw material.

(7). Others The present invention can be embodied in various ways other than the above embodiment. For example, as a method of forming the side support portion, a bag body is interposed between the base cushion body and the seat inner shell, and air or fluid is injected into the bag body to partially lift the base cushion body upward. It can also be enlivened.

It is a front view of the chair concerning a 1st embodiment. (A) is a plan view of the chair, (B) is a cross-sectional view taken along the line BB of (A), and (C) and (D) are diagrams showing a modification. It is a figure which shows an effect | action. It is a figure which shows 2nd Embodiment. It is a figure which shows 3rd Embodiment. It is a vertical front view of 4th Embodiment. It is a top view of the seat inner shell concerning a 4th embodiment. It is a figure which shows 5th Embodiment.

Explanation of symbols

4 seat 7 seat inner shell 8 base cushion body 9 longitudinal center line 10 center support portion 11 front side support portion 12 rear side support portion 14 auxiliary cushion body 22 auxiliary pad

Claims (3)

A seat and a backrest, and the seat is provided with auxiliary means for stabilizing the legged posture when the seated person is crossing the legs,
Chair. The seat has a structure in which a cushion body is stretched on the upper surface of the seat inner shell. The seat surface of the seat has a center support portion extending in the front-rear direction along the longitudinal center line of the seat, and both left and right sides of the center support portion. And is divided into left and right side support parts constituting the auxiliary means,
The center support portion is substantially horizontal when viewed from the front, or has a shape along a concave shape facing upward in a horizontal state, while the side support portion is low at a portion close to the center support portion and far from the center support portion. The portion is a raised or stepped cross-sectional shape that is higher, and the boundary line between the center support part and the side support part has a substantially square shape that is concave toward the center line in plan view,
Further, the side support portion is formed by laminating another auxiliary cushion body on the base cushion body extending over the entire seat, changing the profile of the upper surface of the base cushion body extending over the entire seat, The part corresponding to the side support part is formed by selecting one of bending around the boundary part with the center support part,
The chair according to claim 1. A pad that is used to stabilize the posture of the person who is sitting with his legs crossed, and is made of cushioning material. It has a substantially plate-like form that can be sandwiched between the outer part of the thigh and the seat surface, and the part located on the left and right outer sides of the seat is thick and close to the left and right middle part of the seat in the front view of the chair It is formed with unequal thickness so that the positioned part becomes thin,
Auxiliary pad for chair seat.

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