JP2021045503A - Wheelchair and wheelchair seat - Google Patents

Abstract

To provide a wheelchair seat and a wheelchair excellent in feeling of sitting.SOLUTION: A wheelchair 2 comprises: left and right side frames 4; a seat part 12 for supporting the thigh part of a user between the left and right side frames 4; a back surface part 14 for supporting the back of the user; and a hip seat 18 for supporting the hip of the user. The hip seat 18 includes a pair of left and right belt-like seats 52 bridged over the seat part 12 and the back surface part 14. A length at a longitudinal direction outer edge of the belt-like seat 52 is shorter than a length at a longitudinal direction inner edge. A breadth from the outer edge of the one belt-like seat 52 to the outer edge of the other belt-like seat 52 is preferably decreased gradually from the back surface part 14 to the seat part 12.SELECTED DRAWING: Figure 1

Description

The present invention relates to a wheelchair seat and a wheelchair including the wheelchair seat.

The wheelchair includes a seat and a back that support the seated user. This seat supports the seated user from below. The back portion supports the user from behind. The buttocks of the user in the sitting posture are curved from the front-back direction to the up-down direction. The buttocks that are curved in this way are difficult to support on the seat and back.

Patent Document 1 (Patent No. 4470802) discloses a wheelchair in which the rear portion of the seat portion is more easily extended than the front portion. Similarly, the lumbar spine below the back is more likely to extend than the upper part. In this wheelchair, the posterior part of the seat and the lumbar part of the back can extend along the curvature of the buttocks. The seat and back are easier to follow the user's buttocks than those of a conventional wheelchair. This wheelchair is more comfortable to sit on than a conventional wheelchair.

Japanese Patent No. 4470802

In this wheelchair, the rear part of the seat part and the lumbar spine part of the back part extend, so that the seat part and the back part easily follow the shape of the buttocks. However, the posterior and posterior lumbar vertebrae of such a seat cannot sufficiently support the lateral sides of the buttocks in the left-right direction. The seat and rear are inferior in fit on the buttocks. There is room for further improvement in the seat portion and the back portion from the viewpoint of the sitting comfort of the user.

An object of the present invention is to provide a wheelchair seat and a wheelchair having excellent sitting comfort.

The wheelchair according to the present invention includes a left and right side frame, a seat portion that supports the user's thigh between the left and right side frames, a back portion that supports the user's back, and the user's wheelchair. It is provided with a buttock sheet that supports the buttock. The buttock seat includes a pair of strip-shaped seats that are hung between the seat portion and the back surface portion. The length of the strip-shaped sheet at the outer edge in the left-right direction is shorter than the length at the inner edge in the left-right direction.

Other wheelchairs according to the present invention include left and right side frames, a seat portion that supports the user's thigh between the left and right side frames, a back portion that supports the user's back, and a user's. It is provided with a buttock sheet that supports the buttock. The buttock seat includes a pair of strip-shaped seats that are hung between the seat portion and the back surface portion. The width of the pair of strip-shaped sheets from the outer edge of one strip-shaped sheet to the outer edge of the other strip-shaped sheet gradually decreases from the back surface portion toward the seat portion.

Preferably, the back surface is provided with a connecting belt extending in the left-right direction between the left and right side frames. Each strip-shaped sheet is connected to the connecting belt.

Preferably, in the vertical direction, the connection position between the buttocks seat and the back surface portion is located at the height of the waist of the user to be seated.

Preferably, the wheelchair further comprises a waist belt that supports the user's waist from behind. The lumbar belt is arranged in front of the buttock seat.

The wheelchair seat according to the present invention includes a seat portion that supports the thighs of a user sitting on a wheelchair, a back portion that supports the back of the user, and a buttocks seat that supports the buttocks of the user. Be prepared. The buttock seat includes a pair of strip-shaped seats that are hung between the seat portion and the back surface portion. The length of the strip-shaped sheet at the outer edge in the left-right direction is shorter than the length at the inner edge in the left-right direction.

The other wheelchair according to the present invention includes a left and right side frame, a seat portion that supports the user's thigh between the left and right side frames, a back portion that supports the user's back, and a user's wheelchair. It is provided with a buttock sheet that supports the buttock.
The back surface portion includes a connecting belt extending in the left-right direction between the left and right side frames.
The buttock seat is hung on the seat and the connecting belt. The connecting belt is hung between the side frames in a bent state.

Preferably, the wheelchair further comprises a waist belt that supports the user's waist from behind. The lumbar belt is arranged in front of the buttock seat.

In this wheelchair, the buttocks can be supported from below while the left and right sides of the user's buttocks are sufficiently supported. This wheelchair has an excellent buttock fit. This wheelchair is comfortable to sit on.

FIG. 1 is a perspective view showing a wheelchair according to an embodiment of the present invention. FIG. 2 is a perspective view showing a pair of side frames and a cross frame of the wheelchair of FIG. FIG. 3 is a plan view showing the seat and buttock seats of the wheelchair of FIG. FIG. 4 is a perspective view in which a seat seat, a back seat, and a buttock seat are attached to a pair of side frames of the wheelchair of FIG. FIG. 5 is an enlarged view of the seat seat and the buttock seat of FIG. FIG. 6 is a side view in which a seat seat, a back seat, a lumbar seat, and a buttock seat are attached to a pair of side frames of the wheelchair of FIG.

Hereinafter, the present invention will be described in detail based on preferred embodiments with reference to the drawings as appropriate.

FIG. 1 shows a wheelchair 2 according to the present invention. The arrow X in FIG. 1 represents the front-rear direction of the wheelchair 2. The arrow Y represents the left-right direction of the wheelchair 2. The arrow Z indicates the upward / downward improvement direction of the wheelchair 2.

The wheelchair 2 includes a pair of side frames 4, a cross frame 6 as a connecting frame, a pair of front wheels 8, a pair of rear wheels 10, a seat 12 as a seat, and a back seat 14 as a back. A waist seat 16 and a buttock seat 18 are provided. The lumbar seat 16 includes a lumbar belt 16a, a lumbar belt 16a, and an upper lumbar seat 16b connected to the back seat 14.

FIG. 2 shows a pair of side frames 4 and a cross frame 6. Each side frame 4 includes a base pipe 22, a seat side pipe 24, a footrest pipe 26, a rear wheel mounting portion 28, a back pipe 30, a pair of front and rear connecting portions 32, and a support 34.

The base pipe 22 is located below the side frame 4 and extends in the front-rear direction. A pair of front and rear connecting portions 32 to which the cross frame 6 is connected are attached to the base pipe 22. The front wheel 8 is attached to the base pipe 22 (see FIG. 1).

The seat side pipe 24 is located above the base pipe 22 and extends in the front-rear direction. The footrest pipe 26 is located on the front side of the side frame 4. The footrest pipe 26 extends in the vertical direction. The footrest pipe 26 extends downward from the front end of the seat side pipe 24. The front end of the base pipe 22 is fixed to the footrest pipe 26.

The rear wheel mounting portion 28 includes a mounting portion main body 28a and a connecting pipe 28b as a connecting support portion. The mounting body 28a extends in the vertical direction. The lower end of the rear wheel mounting portion 28 is fixed to the rear portion of the base pipe 22. The mounting portion main body 28a includes a rear wheel mounting surface 28c and a plurality of rear wheel mounting holes 28d formed on the rear wheel mounting surface 28c. The connecting pipe 28b extends in the front-rear direction along the seat side pipe 24. The upper end of the mounting body 28a is fixed to the rear of the connecting pipe 28b. The connecting pipe 28b is fixed to the seat side pipe 24. The rear wheel 10 is attached to the rear wheel attachment portion 28 (see FIG. 1).

The back pipe 30 extends in the vertical direction above the rear wheel mounting portion 28. The back pipe 30 extends upward from the rear end of the seat side pipe 24. The upper end portion 30a of the back pipe 30 bends from the vertical direction to the front-rear direction and extends rearward. A push handle is attached to the upper end portion 30a. The push handle is gripped by a caregiver standing behind the wheelchair 2.

Each connecting portion 32 is attached to the base pipe 22. The cross frame 6 is connected to the connecting portion 32. The pair of side frames 4 are connected via a cross frame 6.

The cross frame 6 includes a pair of seat pipes 36, a front cross member pair 38 and a rear cross member pair 40. The pair of seat pipes 36 extend in the front-rear direction. Each seat pipe 36 extends along the seat side pipe 24.

The front cross member vs. 38 is composed of a cross member 38a and a cross member 38b. The central portion of the cross member 38a and the central portion of the cross member 38b are pivotally attached. The upper end of the cross member 38a is fixed to the left seat pipe 36, and the upper end of the cross member 38b is fixed to the right seat pipe 36. The lower end of the cross member 38a is pivotally attached to the right connecting portion 32, and the lower end of the cross member 38b is pivotally attached to the left connecting portion 32.

The rear cross member vs. 40 is composed of a cross member 40a and a cross member 40b. The rear cross member vs. 40 is located behind the front cross member vs. 38. The cross member 40a and the cross member 40b are pivotally attached to the connecting portion 32 attached to the base pipe 22 in the same manner as the cross member 38a and the cross member 38b described above. The upper end of the cross member 40a is connected to the cross member 38a, and the upper end of the cross member 40b is connected to the cross member 38b.

The right seat pipe 36 is detachably supported by the right seat side pipe 24 via a seat receiver (not shown). The left seat pipe 36 is also detachably supported by the left seat side pipe 24 via a seat receiver (not shown). The width of the wheelchair 2 can be changed by the front cross member vs. 38 and the rear cross member vs. 40. Further, the posture of the wheelchair 2 can be changed between the use posture in which the user sits and the folding posture in which the left and right side frames 4 are brought close to each other. This wheelchair 2 is foldable.

The support 34 is attached to the back pipe 30. The support 34 is arranged at the waist level of the seated user. This waist height refers to the height that supports the middle abdomen of the pelvis, more specifically the posterior superior iliac spine. The support 34 includes a support bar 34a extending in the vertical direction. The support bar 34a is located in front of the back pipe 30 and extends in the vertical direction.

FIG. 3 shows a plan view of the seat seat 12 and the buttock seat 18. In this wheelchair 2, the seat seat 12 and the buttocks seat 18 are integrally formed. Although not shown, the seat seat 12 and the buttock seat 18 may be formed separately, and the seat seat 12 and the buttock seat 18 may be connected to each other.

The seat 12 is hung on a pair of seat pipes 36. The seat seat 12 includes a seat body portion 42 and a front end portion 44. The seat body portion 42 is not particularly limited, but is formed of, for example, cloth. A plurality of mounting holes 42a are formed at the left-right end of the seat body 42. The seat body 42 is screwed to the seat pipe 36 by the mounting holes 42a, for example.

The front end portion 44 is located in front of the seat body portion 42 and is hung on a pair of seat pipes 36. The front end portion 44 has a strip shape with the left-right direction as the longitudinal direction. The front end portion 44 includes a rubber band 48 as an elastic body and a pair of cloth bands 50. Cloth bands 50 are connected to both ends of the rubber band 48 in the left-right direction. A plurality of mounting holes 50a are formed at the outer ends of the cloth band 50 in the left-right direction. The front end 44 is screwed, for example, to the seat pipe 36 by the mounting hole 50a.

The seat seat 12 does not necessarily have to be a separate body of the seat body portion 42 and the front end portion 44. The seat 12 is made of cloth, but the material is not particularly limited as long as it can be supported by the user.

The buttock sheet 18 includes a pair of strip-shaped sheets 52 and a reinforcing body 54 that connects the pair of strip-shaped sheets 52. The reinforcing body 54 is located between the pair of strip-shaped sheets 52 in the left-right direction, and connects the pair of strip-shaped sheets 52. The buttock sheet 18 does not necessarily require a reinforcing body 54. Further, although not shown, the reinforcing body 54 may be integrally formed with the pair of strip-shaped sheets 52.

Each strip-shaped sheet 52 includes a sheet body 52a and a connecting ring 52b as a connecting portion. The strip-shaped seat 52 is formed of a strip extending from the seat seat 12. This band is folded back at the tip portion to form a main body portion and a folded portion. The folded-back portion and the main body portion are, for example, sewn together to form a connecting ring 52b. The seat body 52a is formed of a band from the end connected to the seat 12 to the connecting ring 52b.

The alternate long and short dash line L1 in FIG. 3 represents the boundary between the seat seat 12 and the strip-shaped seat 52. This boundary L1 is the rear end position of the seat seat 12 at the portion spanned by the pair of seat pipes 36. At this boundary L1, the seat seat 12 is continuous from one seat pipe 36 to the other seat pipe 36. The alternate long and short dash line L2 represents the center line of the connecting ring 52b.

The double-headed arrow W in FIG. 3 represents the width from the outer edge of one strip-shaped sheet 52 to the outer edge of the other strip-shaped sheet 52. The double-headed arrow Lo represents the length of the strip-shaped sheet 52 at the outer edge in the left-right direction. The double-headed arrow Li represents the length of the strip-shaped sheet 52 at the inner edge in the left-right direction. The lengths Lo and Li are measured as the distance from the edge of the strip-shaped sheet 52 to the boundary L1. The center line L2 of the connecting ring 52b is orthogonal to the longitudinal direction of the seat body 52a.

As shown in FIG. 4, the back seat 14 includes a back body portion 56 and a connecting belt 58. The back body portion 56 is hung on a pair of back pipes 30 above. The back body portion 56 supports the back of the user to be seated. The connecting belt 58 is hung on a pair of back pipes 30 below the back body 56. The connecting belt 58 extends in the left-right direction. The connecting belt 58 is arranged at the waist level of the seated user (the middle part of the pelvis, more specifically, the height supporting the posterior superior iliac spine). The connecting belt 58 is passed through the connecting ring 52b of the strip-shaped sheet 52. As a result, the buttocks seat 18 and the back seat 14 are connected.

The point P in FIG. 4 represents the connection position of the connecting ring 52b. As shown in FIG. 4, the connection position P is determined as the center position where the width direction center line L3 of the connection belt 58 and the left-right center line L4 of the connection ring 52b intersect.

FIG. 5 shows the seat 12 and the buttock seat 18 of FIG. In the strip-shaped sheet 52 of the buttock sheet 18, the length Lo of the outer edge in the left-right direction is shorter than the length Li of the inner edge. In FIG. 5, the connecting belt 58 of the back seat 14 is shown by a chain double-dashed line. The connecting belt 58 extends in the left-right direction. Therefore, in the strip-shaped sheet 52, the slack of the inner edge is larger than the slack of the outer edge in the left-right direction.

FIG. 6 shows the seat seat 12, the back seat 14, the lumbar seat 16 and the buttocks seat 18 together with the side frame 4 and the cross frame 6. The seat 12 is hung on a pair of seat pipes 36. The back sheet 14 is hung on a pair of back pipes 30. The buttock seat 18 is hung on the seat seat 12 and the back seat 14.

The lumbar belt 16a of the lumbar seat 16 is hung on the support bar 34a of the support 34. The upper waist seat 16b extends from the upper end of the waist belt 16a and is connected to the back body portion 56 of the back seat 14. The waist belt 16a is located in front of the connecting belt 58 of the back seat 14. The waist belt 16a and the connecting belt 58 are located at the height of the seated user's waist. The waist belt 16a and the waist seat 16b may be integrated or separate, and the waist seat 16b and the back seat 14 may be integrated.

In this wheelchair 2, the seat 12 supports the thighs of the user to be seated. The seat 12 supports the anterior thigh from the base of the user's leg. The back sheet 14 supports the user's back. The buttocks sheet 18 supports the buttocks between the base of the user's legs and the back.

The length Lo of the buttock sheet 18 at the outer edge of the strip-shaped sheet 52 is shorter than the length Li at the inner edge thereof. The inner edge of the strip-shaped sheet 52 may be recessed downward and backward while the outer edge is stretched. As a result, the buttocks sheet 18 can bend along the buttocks to support the buttocks while supporting the left and right sides of the buttocks of the user. The buttocks sheet 18 can stably support the buttocks of the user.

The length of the strip-shaped sheet 52 gradually decreases from the length Li at the inner edge to the length Lo at the outer edge. As a result, the strip-shaped sheet 52 can support the buttocks along the shape of the buttocks, which is a three-dimensional curved surface shape.

In the buttock seat 18, the width W from the outer edge of one strip-shaped seat 52 in the left-right direction to the outer edge of the other strip-shaped seat 52 gradually decreases from the back seat 14 toward the seat seat 12. The pair of strip-shaped sheets 52 have a V shape. The pair of strip-shaped sheets 52 can support the buttocks along the shape of the buttocks.

Although the description has been given here by taking a pair of strip-shaped sheets 52 having a V shape as an example, the pair of strip-shaped sheets 52 according to the present invention is not limited to this. The length Lo at the outer edge of the strip-shaped sheet 52 may be shorter than the length Li at the inner edge. The pair of strip-shaped sheets 52 may extend in parallel or may have an inverted V shape. Further, although the example in which one pair of strip-shaped sheets 52 is provided in the left-right direction has been described, at least one strip-shaped sheet 52 may be provided in the left-right direction, and the pair of strip-shaped sheets 52 may be two in each of the left and right directions. Alternatively, one of the left and right sides may be one and the other may be two.

The strip-shaped sheet 52 is connected to a connecting belt 58 extending in the left-right direction. The connecting belt 58 can bend in the front-rear direction. The connecting belt 58 can bend according to the pair of strips 52 when the pair of strips 52 follow the shape of the buttocks. The connecting belt 58 facilitates the pair of strip-shaped sheets 52 to follow the shape of the buttocks.

In this strip-shaped sheet 52, a connecting belt 58 is passed through a connecting ring 52b. The position of the connecting ring 52b can be adjusted in the left-right direction along the connecting belt 58. The strip-shaped sheet 52 can adjust the position of the connecting ring 52b according to the user. In this wheelchair 2, the connecting belt 58 was used, but it is not limited to this from the viewpoint of position adjustment. From the viewpoint of adjusting the position of the strip-shaped sheet 52, any connecting body that extends left and right between the pair of back pipes 30 and through which the connecting ring 52b is passed may be used. The connecting ring 52b may be passed through, for example, a metal pipe extending left and right between the pair of back pipes 30.

Here, the connecting belt 58 of the back sheet 14 is passed through the connecting ring 52b of the band-shaped sheet 52, but the connection between the band-shaped sheet 52 and the back sheet 14 according to the present invention is not limited to this. The band-shaped sheet 52 and the back sheet 14 may be connected by being sewn, for example.

In the buttocks seat 18, the connection position P between the strip-shaped seat 52 and the back seat 14 is located at the waist height of the seated user. As a result, the buttock sheet 18 easily follows the curved surface of the user's body that bends between the waist and the thigh.

The wheelchair 2 includes a lumbar seat 16. The lumbar belt 16a of the lumbar seat 16 is arranged in front of the buttock seat 18. The back of the human body dents forward at the waist between the buttocks and back. The waist belt 16a can support the waist located in the front from the back while the buttocks are supported by the buttocks sheet 18. By providing the lumbar seat 16, the wheelchair 2 can firmly support the user from behind.

As shown in FIG. 6, in this wheelchair 2, the seat side pipe 24, the footrest pipe 26, and the back pipe 30 are formed by bending one pipe. The seat side pipe 24 receives a downward load. The back pipe 30 receives a rearward load. Bending moments are repeatedly generated between the seat side pipe 24 and the back pipe 30. In wheelchair 2, the load received between the seat side pipe 24 and the back pipe 30 is large. In the wheelchair 2, the seat side pipe 24 and the back pipe 30 are formed of one pipe, so that the side frame 4 is strong and stable.

In this wheelchair 2, the load received by the buttock seat 18 acts on the back pipe 30 via the connecting belt 58. As described above, in the side frame 4, the seat side pipe 24 and the back pipe 30 are formed from one pipe. The side frame 4 is strength-stable with respect to the bending moment generated between the seat side pipe 24 and the back pipe 30. This side frame 4 is suitable for a wheelchair 2 provided with a buttock seat 18.

In the rear wheel mounting portion 28, the mounting portion main body 28a is connected to the connecting pipe 28b. The connecting pipe 28b extends along the seat side pipe 24, and the connecting pipe 28b is fixed to the seat side pipe 24. As a result, the reaction force received from the rear wheel 10 is suppressed from acting locally on the seat side pipe 24. In the wheelchair 2, the reaction force received from the rear wheel 10 does not directly act on the back pipe 30 and the rear end of the seat side pipe 24 continuous with the back pipe 30. The side frame 4 is further stable in strength by providing the rear wheel mounting portion 28.

Since the load received by the buttock sheet 18 acts on the back pipe 30, the load received by the back pipe 30 is large. In this wheelchair 2, the rear wheel mounting portion 28 is connected to the seat side pipe 24. As a result, the load received on the back pipe 30 is reduced. The rear wheel mounting portion 28 is suitable for a wheelchair 2 provided with a buttock seat 18.

In this wheelchair 2, the front end portion 36a of the seat pipe 36 extends in the front-rear direction. The intermediate portion 36b and the rear end portion 36c of the seat pipe 36 extend downward from the front to the rear. The seat seat 12 that supports the user's thigh is hung along the seat pipe 36. The buttock seat 18 extends from the rear of the seat seat 12. The seat 12 and the buttocks seat 18 prevent the user's buttocks from shifting forward. The seat 12 and the buttocks seat 18 can stably and comfortably support the buttocks of the user.

The seat 12 has a front end 44 having excellent elasticity. In the seat 12, the thighs of the seated user are inclined downward toward the buttocks. Further, the buttock sheet 18 can support the user's buttock below the thigh. The front end 44 supports the portion of the thigh of the user in such a posture near the back of the knee. By extending the front end portion 44, it is possible to prevent the portion near the back of the knee from being pressed by the seat seat 12. In this wheelchair 2, the user can sit comfortably.

Although not shown, the wheelchair 2 may be further cushioned. The cushion functions as a cushioning material between the seat seat 12, the back seat 14, the lumbar seat 16, the buttock seat 18, and the user's body. In this wheelchair 2, a material that can be expanded and contracted not only in the thickness direction but also in the width direction and the longitudinal direction is preferably used as the cushion. For example, a mesh-shaped cover sheet is used as the cushion.

This wheelchair 2 is foldable. In the buttock sheet 18, the strip-shaped sheet 52 is formed of cloth. Since the strip-shaped sheet 52 has flexibility, it does not hinder the folding of the wheelchair 2. Further, the pair of strip-shaped seats 52 are hung on the seat seat 12 and the back seat 14. Even if the seat 12 and the back seat 14 are made of a flexible material such as a cloth or a belt, the buttock seat 18 can properly support the buttock. The buttock seat 18 is suitable for a foldable wheelchair 2.

The strip-shaped sheet 52 is made of cloth, but is not limited to this. The strip-shaped sheet 52 may be made of an elastic member, for example, a sheet-shaped rubber. Further, the buttock sheet 18 may have an adjustable length in the longitudinal direction. Further, although the buttock seat 18 is formed integrally with the seat seat 12, it may be a separate body. Further, the buttocks seat 18 and the back seat 14 may be integrally formed, or the buttocks seat 18, the seat seat 12 and the back seat 14 may be integrally formed.

In this wheelchair 2, the band-shaped sheet 52 and the connecting belt 58 may be sewn together. Further, the strip-shaped sheet 52 and the connecting belt 58 may be an integral cloth. When the strip-shaped sheet 52 and the connecting belt 58 are integrated, the lengths Lo and Li are measured as the distances from the intersection of the extension line of the edge of the strip-shaped sheet 52 and the upper edge of the connecting belt 58 to the boundary L1. To.

In this wheelchair 2, a pair of strip-shaped sheets 52 are used as the buttock seats 18, but the buttock seats 18 according to the present invention are not limited to this. In the usage posture of the wheelchair 2, the inner portion of the buttock seat 18 in the left-right direction may be bent while the outer portion of the buttock seat 18 in the left-right direction is stretched. As a result, the buttocks can be supported from below while the left and right side surfaces of the user's buttocks are sufficiently supported. Such a buttock seat 18 has an excellent fit of the buttock and is excellent in sitting comfort.

In this wheelchair 2, instead of the connecting belt 58, another connecting belt that is hung in a bent state in the usage posture of the wheelchair 2 may be used. In the wheelchair 2, the length between the pair of side frames 4 of the other connecting belts is made longer than the distance between the pair of side frames 4 in the usage posture. As a result, even if another buttock sheet having the same length Lo and the length Li is used instead of the buttock sheet 18, the inner portion of the other buttock sheet in the left-right direction is bent. sell. By hanging the other buttock sheet over such another connecting belt, the other buttock sheet may be in a state in which the lateral side portion thereof is stretched and the lateral side inner portion thereof is bent.

The wheelchair 2 may have the same configuration as the wheelchair 2 described above, except that it is changed to another connecting belt. Further, the configuration of the wheelchair 2 may be the same as that of the wheelchair 2 except that the other connecting belt and the other buttock seat are changed. In the other buttock sheet, the length Lo and the length Li are not limited to the same length. Further, the other buttock sheet may be formed of a pair of strip-shaped sheets as in the case of the pair of strip-shaped sheets 52.

In a wheelchair 2 provided with such another connecting belt, it is particularly preferable to provide a waist belt 16a that supports the user's waist from behind. By providing the lumbar seat 16 (lumbar belt 16a), the wheelchair 2 can firmly support the user from behind. Further, in such another connecting belt, the other connecting belt and the other buttock sheet can be easily produced from the one-piece fabric. The other connecting belt and the other buttock sheet may be sewn together, or they may be manufactured separately.

2 ... Wheelchair 4 ... Side frame 12 ... Seat seat (seat)
14 ... Back sheet (back part)
16 ... Lumbar sheet 16a ... Lumbar belt 16b ... Upper waist sheet 18 ... Buttocks sheet 52 ... Band-shaped sheet 52a ... Band body 52b ... Connecting ring (connection part)
58 ・ ・ ・ Connection belt

Claims (8)

The left and right side frames, a seat portion that supports the user's thigh between the left and right side frames, a back portion that supports the user's back, and a buttocks seat that supports the user's buttocks are provided. ,
The buttock seat includes a pair of strip-shaped seats that are hung on the seat portion and the back portion.
A wheelchair in which the length of the strip-shaped sheet at the outer edge in the left-right direction is shorter than the length at the inner edge in the left-right direction. The left and right side frames, a seat portion that supports the user's thigh between the left and right side frames, a back portion that supports the user's back, and a buttocks seat that supports the user's buttocks are provided. ,
The buttock sheet includes a pair of band-shaped sheets extending over the seat and the back surface, and the width of the pair of band-shaped sheets from the outer edge of one band-shaped sheet to the outer edge of the other band-shaped sheet is the said. A wheelchair that gradually decreases from the back to the seat. The back portion is provided with a connecting belt extending in the left-right direction between the left and right side frames.
The wheelchair according to claim 1 or 2, wherein each strip-shaped sheet is connected to the connecting belt. The wheelchair according to any one of claims 1 to 3, wherein the connection position between the buttocks seat and the back surface portion is located at the height of the seated user's waist in the vertical direction. Further equipped with a waist belt that supports the user's waist from behind,
The wheelchair according to any one of claims 1 to 4, wherein the waist belt is arranged in front of the buttocks seat. It is provided with a seat portion that supports the thighs of the user sitting on a wheelchair, a back portion that supports the back of the user, and a buttocks seat that supports the buttocks of the user.
For wheelchairs, the buttock seat includes a pair of strip-shaped seats straddled between the seat portion and the back portion, and the length of the strip-shaped seat at the outer edge in the left-right direction is shorter than the length at the inner edge in the left-right direction. Sheet. The left and right side frames, a seat portion that supports the user's thigh between the left and right side frames, a back portion that supports the user's back, and a buttocks seat that supports the user's buttocks are provided. ,
The back portion is provided with a connecting belt extending in the left-right direction between the left and right side frames.
The buttock seat is hung on the seat and the connecting belt.
A wheelchair in which the connecting belt is hung between the left and right side frames in a bent state. Further equipped with a waist belt that supports the user's waist from behind,
The wheelchair according to claim 7, wherein the waist belt is arranged in front of the buttocks seat.

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