JP7201348B2 - wheelchair - Google Patents

Description

The present invention relates to wheelchairs.

Conventionally, a wheelchair is known in which the depth dimension of a seating space can be adjusted (see Patent Document 1, for example). In the wheelchair disclosed in Patent Document 1, when used by a short user, the depth dimension is shortened by positioning the sub-frame toward the rear with respect to the main frame. Further, in the wheelchair disclosed in Patent Document 1, when a tall user uses the wheelchair, the depth dimension is increased by positioning the sub-frame forward with respect to the main frame. A seat is attached to the sub-frame, and the seat moves forward or backward depending on the position of the sub-frame. The wheelchair disclosed in Patent Literature 1 has a depth dimension that is adjusted according to the height of the user, so that the user can place their feet on the footrests in a comfortable posture.

Japanese Patent No. 5277031

However, in the wheelchair disclosed in Patent Document 1, although the seat portion moves forward or backward according to the position of the sub-frame, the length of the seat portion in the traveling direction does not change. For this reason, the length of the seat in the traveling direction is lengthened to facilitate the maintenance of the user's posture while resting, and the length of the seat in the traveling direction is shortened to allow the user to eat. Inability to make adjustments to facilitate changes in posture. In addition, even if an attempt is made to improve sitting comfort by arranging a cushion on the seat, the position of the seat changes depending on the depth dimension, so the cushion cannot be reliably supported by the seat when the depth dimension is increased. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. To provide a wheelchair capable of being reliably supported by a seat surface.

According to the present invention, the above problem is solved by: a seat surface portion that supports a cushion for the user to sit on; a pair of wheels that rotate about axles; a frame portion that supports the seat surface portion and the pair of wheels; wherein the seat portion includes: a first seat frame attached to the frame portion and forming a first seat surface; a second seating surface frame that forms a second seating surface; and a sheet-like member that is attached to the first seating surface frame and the second seating surface frame, wherein the sheet-like member When the seat surface and the second seat surface are arranged close to each other, the seat is in a retracted state, and when the second seat surface moves forward in the traveling direction with respect to the first seat surface, the seat extends. A third seat surface supporting the cushion is formed between the first seat surface and the second seat surface, and the cushion is supported by the first cushion member supported by the first seat surface. a second cushion member disposed forward of the first cushion member in the traveling direction; and a connecting portion that connects the member so as to be movable in the advancing direction, and the connecting portion is folded to be connected to the first cushion member, unlike the first cushion member and the second cushion member. It has a thin structure that can be accommodated between the second cushion members, and the third seat surface moves forward in the traveling direction with respect to the first seat surface. The first seat frame includes a pair of first cylindrical portions extending in the traveling direction and arranged at a predetermined interval in the vehicle width direction along the axle; a plurality of first wire-shaped members attached to one and the other of a pair of first cylindrical portions and arranged along the vehicle width direction, wherein the plurality of first wire-shaped members are arranged in the traveling direction; The first seat surface is formed by being spaced apart, and the second seat frame includes a pair of second cylindrical portions that extend in the traveling direction and are spaced apart in the vehicle width direction. and a plurality of second wire-shaped members attached to one and the other of the pair of second cylindrical portions and arranged along the vehicle width direction, wherein the plurality of second wire-shaped members are connected to the The plurality of first wires are spaced apart in the direction of travel to form the second seating surfaces, and the plurality of first wires in the direction of travel The arrangement interval of the wire-shaped members is narrower than the arrangement interval of the plurality of second wire-shaped members in the traveling direction, and the sheet-shaped member has an end on the front side in the traveling direction that is located on the first seating surface. The second wire-like member is attached to the second wire-like member close to the second wire-like member, and the end on the rear side in the traveling direction is attached to the first wire-like member close to the second seat surface, and the second wire-like member attached to the The wire-shaped member is not arranged between the shaped member and the first wire-shaped member, and when the second seat surface and the second cushion member move in the direction of movement, the sheet-shaped member is connected to the seat-shaped member. The problem is solved by the wheelchair characterized in that the connecting portion is supported by the first wire-shaped member without supporting the connecting portion .

According to the wheelchair having the above configuration, the second seat frame is attached to the first seat frame attached to the frame portion so as to be movable in the traveling direction. Therefore, a state in which the first seat surface formed by the first seat surface frame and the second seat surface formed by the second seat surface frame are arranged close to each other to shorten the length of the seat surface in the traveling direction, and It is possible to switch between a state in which the first seat surface and the second seat surface are spaced apart from each other and the length of the seat surface in the traveling direction is lengthened. Further, the sheet-shaped member attached to the first seat frame and the second seat frame is in an extended state when the second seat surface moves forward in the traveling direction with respect to the first seat surface. A third seat surface for supporting the cushion is formed between the seat surface and the second seat surface. Therefore, even when the first seat surface and the second seat surface are separated from each other, the cushion can be reliably supported by the third seat surface.
As described above, according to the wheelchair according to the above configuration, the length of the seat supporting the cushion on which the user sits can be adjusted in the traveling direction, and even when the seat is lengthened, the cushion is more securely attached to the seat. It is possible to provide a wheelchair that can support the
Further, according to the wheelchair according to the above configuration, the first cushion member and the second cushion member are connected so that the second cushion member can move in the traveling direction with respect to the first cushion member. When the length of the seat surface in the traveling direction becomes long, the length of the cushion can be lengthened by moving the second cushion member according to the length of the seat surface. Further, even when the second seat surface moves forward in the traveling direction with respect to the first seat surface, the second cushion member is supported by the third seat surface, so a part of the second cushion member is not supported. does not occur.
Further, according to the wheelchair according to the above configuration, the first seat surface that supports the cushion can be formed by a relatively simple configuration in which the plurality of first wire-shaped members are arranged at intervals in the traveling direction. . Similarly, the second seat surface that supports the cushion can be formed by a relatively simple configuration in which a plurality of second wire-shaped members are arranged at intervals in the traveling direction. Further, the front end of the sheet-like member is attached to the second wire-like member close to the first seat surface, and the rear end of the sheet-like member is attached to the first wire member close to the second seat surface. elongation by
A sheet-like member that forms the third seat surface can be arranged in this state. Thus, the relatively simple configuration using the plurality of first wire-shaped members, the plurality of second wire-shaped members, and the sheet-shaped member ensures that the cushion is supported by the seat surface even when the seat surface is lengthened. be able to.
Further, according to the wheelchair according to the above configuration, since the arrangement interval of the first wire-shaped member is narrower than the arrangement interval of the second wire-shaped member, the first seat surface has higher load bearing performance than the second seat surface. It has Therefore, the load of the user can be reliably supported by the first seat surface arranged at a position where a large amount of the load of the user is transmitted.

In the wheelchair according to the present invention, preferably, the first wire members are attached to the pair of first tubular portions via a pair of first elastic members provided at both ends in the vehicle width direction,
The second wire member is attached to the pair of second tubular portions via a pair of second elastic members provided at both ends in the vehicle width direction.
According to the wheelchair according to the above configuration, since the first wire member is attached to the pair of first cylindrical portions via the pair of first elastic members, tension is applied to the first wire member in the vehicle width direction, The load transmitted from the cushion can be supported by the biasing force of the first elastic member. Similarly, since the second wire member is attached to the pair of second cylindrical portions via the pair of second elastic members, tension in the vehicle width direction is applied to the second wire member, and the load transmitted from the cushion is reduced. can be supported by the biasing force of the second elastic member.

According to the present invention, it is possible to adjust the length of the seat surface supporting the cushion on which the user sits in the advancing direction, and to reliably support the cushion by the seat surface even when the seat surface is lengthened. Wheelchairs can be provided.

It is a perspective view showing a wheelchair concerning one embodiment of the present invention. Fig. 2 is a perspective view showing a state in which an outer cushion is attached to the wheelchair shown in Fig. 1; Fig. 2 is a left side view of the wheelchair shown in Fig. 1; FIG. 4 is a partial enlarged view of the wheelchair shown in FIG. 3, showing a state in which the first seat surface frame and the second seat surface frame are arranged close to each other; FIG. 4 is a partial enlarged view of the wheelchair shown in FIG. 3, showing a state in which the second seat frame has moved forward with respect to the first seat frame; FIG. 5 is a plan view of the seat portion shown in FIG. 4 as seen from above; FIG. 6 is a plan view of the seat portion shown in FIG. 5 as viewed from above; FIG. 7 is a cross-sectional view of the seat portion shown in FIG. 6 taken along the line I-I. FIG. 8 is a cross-sectional view of the seat portion shown in FIG. 7 taken along line II-II.

Preferred embodiments of the invention are described in detail below with reference to the drawings. Since the embodiments described below are preferred specific examples of the present invention, various technically preferable limitations are applied. Unless otherwise stated, the invention is not limited to these modes. Further, in each drawing, the same constituent elements are denoted by the same reference numerals, and detailed description thereof will be omitted as appropriate.

A wheelchair 100 according to an embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing a wheelchair 100 according to this embodiment. FIG. 2 is a perspective view showing a state in which the outer cushion 92 is attached to the wheelchair 100 shown in FIG. 3 is a left side view of the wheelchair 100 shown in FIG. 1. FIG. In FIG. 3, the outer cushion 92 and the left rear wheel 30 are omitted for understanding of the structure.

As shown in FIGS. 1 to 3, the wheelchair 100 includes a seat surface portion 10, a seat portion 20, a pair of rear wheels 30, a pair of front wheels 40, a frame portion 50, a pair of armrests 60, and a handle. 70 , a pair of foot support portions 80 , an inner cushion 91 and an outer cushion 92 . The wheelchair 100 is an assistance vehicle that allows a user to sit on the seat portion 10 and a caregiver to hold a handle 70 to move the wheelchair 100 forward.

The seat surface portion 10 forms an inner cushion 91 for the user to sit on and a seat surface for supporting an outer cushion 92 arranged on the inner cushion 91 . The seat portion 10 is rotatable about the rotation axis X2 with respect to the frame portion 50 . The wheelchair 100 of this embodiment has a tilt function for adjusting the inclination angle (tilt angle) of the seat surface portion 10 with respect to the installation surface on which the wheelchair 100 is installed. A detailed configuration of the seat surface portion 10 will be described later.

The seat portion 20 has a backrest portion 21, a lumbar support 22, and a headrest 23 each formed of a cushioning material having appropriate hardness and flexibility. The backrest portion 21 supports the back of the user seated on the seat surface portion 10 . Lumbar support 22 supports the user's lower back. The headrest 23 supports the back of the user's head.

The rear wheel 30 is a rotating member that rotates about the axle X1 and is attached to the frame portion 50 .
The front wheel 40 is a rotating member that rotates about a rotation axis and is attached to the frame portion 50 . The front wheels 40 are swingable about a swing axis extending in the vertical direction so as to be steerable by a caregiver.

The frame portion 50 supports each structural member of the wheelchair 100 including the seat portion 10 , the seat portion 20 , the rear wheels 30 and the front wheels 40 . The frame portion 50 is formed of, for example, a metal pipe in order to reduce the weight while providing sufficient strength to support the weight of the user. As shown in FIG. 3, the frame section 50 has a basic frame 51 that is the center of the frame structure, and an upper frame 52 that is attached to the upper part of the basic frame. The base frame 51 is a frame that supports the pair of rear wheels 30 rotatably around the axle X1. The basic frame 51 also rotatably supports a pair of front wheels 40 so that the wheelchair 100 can be steered.

The basic frame 51 has a base frame 51a and a lower frame 51b. The base frame 51a is a member serving as a framework extending from the front wheels 40 to the rear wheels 30 of the wheelchair 100. As shown in FIG. The lower frame 51b is a framework that is disposed below the base frame 51a and substantially parallel to the base frame 51a.

The upper frame 52 is a frame for supporting the back and waist of the user. It has a frame 52b. A lumbar support 22 is attached to the lumbar frame 52a, and a backrest 21 is attached to the back frame 52b. The upper frame 52 is rotatable about the rotation axis X3 with respect to the seat surface portion 10 . The wheelchair 100 of this embodiment has a reclining function of adjusting the reclining angle between the seat portion 10 and the upper frame 52 .

The armrests 60 are for resting the elbows of the user seated on the seat surface 10, and are provided on both sides in the vehicle width direction along the axle X1 so as to sandwich the seat surface 10 therebetween. The armrest portion 60 is adjustable in vertical height according to the height and body shape of the user. 1 and 2 show an example in which the right armrest 60 is held at a high position and the left armrest 60 is held at a low position.

The handle 70 is held by the hand of the caregiver, and is used to transmit the force of the caregiver to move the wheelchair 100 to the wheelchair. The handle 70 is provided with a lever 71 that can be pulled to the handle 70 by the caregiver while gripping the handle 70 . By pulling the lever 71, the seat surface portion 10 becomes rotatable about the rotation axis X2 with respect to the frame portion 50, and the upper frame 52 is rotatable with respect to the seat surface portion 10 about the rotation axis X3. state. A biasing force generated by the cylinder SI attached to the basic frame 51 is transmitted to the upper frame 52 .

The caregiver pulls the lever 71 to move the handle 70 up and down to adjust the reclining angle between the seat 10 and the upper frame 52 and the tilt angle of the seat 10 with respect to the installation surface of the wheelchair 100 . By releasing the grip, the reclining angle and the tilt angle can be fixed at desired angles. As described above, the wheelchair 100 of this embodiment has an adjustment mechanism for adjusting the reclining angle and the tilt angle to any desired angle by the handle 70, the lever 71, the cylinder SI, the rotating shaft X2, the rotating shaft X3, and the like. there is

The foot support portion 80 is a member that supports both feet of the user seated on the seat surface portion 10 . The foot support portion 80 is attached to the front end portion of the seat portion 10 . The foot support portion 80 is rotatable around an axis along the vertical direction. By rotating the foot support portion 80 around the axis and moving it to both end sides in the vehicle width direction along the axle X1, the user can easily sit on the seat surface portion 10 from a standing state. .

The inner cushion 91 is for the user to sit on, and is made of a cushioning material with appropriate hardness and flexibility. As shown in FIG. 3, the inner cushion 91 includes a first cushion member 91a arranged on the rear side in the traveling direction of the wheelchair 100 and a second cushion member 91a arranged on the front side in the traveling direction of the first cushion member 91a. and a member 91b. As shown in FIGS. 4 and 5, the first cushion member 91a and the second cushion member 91b are connected by a connecting portion 91c whose length in the traveling direction is adjustable. The connecting portion 91c connects the first cushion member 91a and the second cushion member 91b so that the second cushion member 91b can move in the advancing direction with respect to the first cushion member 91a.

The outer cushion 92 is arranged so as to cover the inner cushion 91 , the backrest portion 21 , the lumbar support 22 and the headrest 23 , and is made of a cushioning material having a hardness lower than that of the inner cushion 91 . The outer cushion 92 is detachable from the inner cushion 91, the backrest portion 21, the lumbar support 22, and the headrest 23.

Next, the seat surface portion 10 will be described in detail with reference to the drawings.
FIG. 4 is a partially enlarged view of the wheelchair 100 shown in FIG. 3, showing a state in which the first seat frame 11 and the second seat frame 12 are arranged close to each other. FIG. 5 is a partially enlarged view of the wheelchair 100 shown in FIG. 3, showing a state where the second seat frame 12 has moved forward with respect to the first seat frame 11. As shown in FIG. 6 and 7 are top plan views of the seat portion shown in FIGS. 4 and 5, respectively. 8 is a cross-sectional view of the seat portion 10 shown in FIG. 6 taken along the line II, and FIG. 9 is a cross-sectional view of the seat portion 10 shown in FIG. 7 taken along the line II-II. In FIGS. 6 and 7, illustration of the inner cushion 91 and the outer cushion 92 supported by the seat surface portion 10 is omitted. 8 and 9, illustration of the outer cushion 92 is omitted.

As shown in FIGS. 4 and 5 , the seat portion 10 has a first seat frame 11 and a second seat frame 12 . As shown in FIGS. 6 to 9 , the seat portion 10 has a sheet-like member 13 . The first seat surface frame 11 is a member that is attached to the frame portion 50 and forms the first seat surface 11a. The second seat frame 12 is a member that is attached to the first seat frame 11 so as to be movable in the traveling direction of the wheelchair 100 and that forms the second seat surface 12a.

The first seat surface frame 11 includes a pair of first tubular portions 11b and 11c that extend in the traveling direction and are arranged with a predetermined interval W1 in the vehicle width direction along the axle X1. It has a plurality of first wire-shaped members 11d attached to the tubular portion 11c and arranged along the vehicle width direction, a first spring (first elastic member) 11e, an inner cylinder 11f, and an inner cylinder 11g. . The first seat surface frame 11 forms the first seat surface 11a that supports the first cushion member 91a and the second cushion member 91b by arranging the first wire-shaped members 11d at intervals in the traveling direction. The first wire-shaped member 11d is attached to the first tubular portions 11b and 11c under a predetermined tension through a pair of first springs 11e.

The second seat surface frame 12 includes a pair of second cylindrical portions 12b and 12c that extend in the traveling direction and are arranged with a predetermined interval W1 in the vehicle width direction along the axle X1. and a plurality of second wire-like members 12d attached to the cylindrical portion 12c and arranged along the vehicle width direction. The second seat surface frame 12 forms the second seat surface 12a that supports the second cushion member 91b by arranging the second wire-shaped members 12d at intervals in the traveling direction. The second wire-like member 12d is attached to the second cylindrical portions 12b and 12c under a predetermined tension via a pair of second springs (first elastic members) 12e.

The inner cylinder 11f of the first seat frame 11 is a cylindrical member attached to the front side of the first cylinder portion 11b in the direction of travel. The inner cylinder 11g of the first seat frame 11 is a cylindrical member attached to the front side of the first cylinder portion 11c in the traveling direction. The outer diameter of the inner cylinder 11f is smaller than the inner diameter of the second cylindrical portion 12b of the second seat frame 12, and is slidably accommodated in the second cylindrical portion 12b. The outer diameter of the inner cylinder 11g is smaller than the inner diameter of the second cylindrical portion 12c of the second seat frame 12, and is slidably accommodated in the second cylindrical portion 12c. Therefore, the second seat frame 12 can move in the traveling direction of the wheelchair 100 with respect to the first seat frame 11 by sliding the second cylindrical portions 12b and 12c inserted into the inner cylinders 11f and 11g. It has become.

As shown in FIGS. 8 and 9, the arrangement interval of the plurality of first wire-shaped members 11d in the traveling direction is narrower than the arrangement interval of the plurality of second wire-shaped members 12d in the traveling direction. This is because the first seat surface 11a formed by the first wire-shaped member 11d is arranged at a position where more of the user's load is transmitted than the second seat surface 12a formed by the second wire-shaped member 12d. This is because Since the arrangement intervals of the first wire-shaped members 11d are narrower than the arrangement intervals of the second wire-shaped members 12d, the first seat surface 11a has higher load bearing performance than the second seat surface 12a.

As shown in FIGS. 6 to 9, the sheet-like member 13 included in the seat portion 10 is attached to a second wire-like member 12d adjacent to the first seat frame 11 at its front end in the direction of travel. It is a sheet-like member attached to the first wire-like member 11 d near the second seat surface frame 12 at its rear end in the direction.

As shown in FIGS. 6 and 8, the sheet member 13 is folded and stored when the first seat surface 11a and the second seat surface 12a are arranged close to each other. Further, as shown in FIGS. 7 and 9, the sheet member 13 is in an extended state when the second seat surface 12a moves forward with respect to the first seat surface 11a. A third seat surface 13a that supports the inner cushion 91 is formed between the surface 11a and the second seat surface 12a. As shown in FIG. 9, the third seat surface 13a supports the second cushion member 91b when the second seat surface 12a moves forward in the traveling direction with respect to the first seat surface 11a.

As shown in FIGS. 6 and 8, the connecting portion 91c of the inner cushion 91 is folded and stored when the first seat surface 11a and the second seat surface 12a are arranged close to each other. 7 and 9, when the second seat surface 12a moves forward in the traveling direction with respect to the first seat surface 11a, the connecting portion 91c is in an extended state, and the first cushion member A seat surface for supporting the user's buttocks or legs is formed between 91a and the second cushion member 91b.

Actions and effects provided by the wheelchair 100 of the present embodiment described above will be described.
According to the wheelchair 100 of this embodiment, the second seat frame 12 is attached to the first seat frame 11 attached to the frame portion 50 so as to be movable in the traveling direction. Therefore, the first seat surface 11a formed by the first seat surface frame 11 and the second seat surface 12a formed by the second seat surface frame 12 are arranged close to each other to shorten the length of the seat surface in the advancing direction. and a state in which the first seat surface 11a and the second seat surface 12a are spaced apart to increase the length of the seat surface in the traveling direction.

Further, the sheet-like member 13 attached to the first seat frame 11 and the second seat frame 12 extends when the second seat 12a moves forward in the traveling direction with respect to the first seat 11a. A third seat surface 13a for supporting the second cushion member 91b is formed between the first seat surface 11a and the second seat surface 12a. Therefore, even when the first seat surface 11a and the second seat surface 12a are separated from each other, the second cushion member 91b can be reliably supported by the third seat surface 13a. As described above, according to the wheelchair 100 of the present embodiment, the length of the seat surface that supports the cushion for the user to sit on can be adjusted in the traveling direction, and even if the seat surface is lengthened, the cushion can be adjusted by the seat surface. It is possible to provide the wheelchair 100 that can be reliably supported.

According to the wheelchair 100 of this embodiment, the first cushion member 91a and the second cushion member 91b are connected so that the second cushion member 91b can move in the traveling direction with respect to the first cushion member 91a. Therefore, when the length of the seat surface in the traveling direction becomes long, the length of the cushion can be lengthened by moving the second cushion member 91b according to the length of the seat surface. Further, even when the second seat surface 12a moves forward in the traveling direction with respect to the first seat surface 11a, the second cushion member 91b is supported by the third seat surface 13a. There is no problem that the part is not supported.

According to the wheelchair 100 of the present embodiment, the first seat surface 11a that supports the cushion can be formed by a relatively simple configuration in which the plurality of first wire-shaped members 11d are arranged at intervals in the traveling direction. can. Similarly, the second seat surface 12a that supports the cushion can be formed by a relatively simple configuration in which a plurality of second wire-shaped members 12d are arranged at intervals in the traveling direction. The front end of the sheet-like member 13 is attached to the second wire-like member 12d close to the first seat surface 11a, and the rear end of the sheet-like member 13 is attached to the second wire-like member 12d close to the second seat surface 12a. By attaching it to one wire member, the sheet-like member 13 that forms the third seat surface in a stretched state can be arranged. In this manner, the relatively simple configuration using the plurality of first wire-shaped members 11d, the plurality of second wire-shaped members 12d, and the sheet-shaped member 13 allows the cushion to be more securely attached to the seat surface even when the seat surface is lengthened. can support

According to the wheelchair 100 of the present embodiment, the first wire-like member 11d is attached to the pair of first tubular portions 11b and 11c via the pair of first springs 11e. By applying tension in the width direction, the load transmitted from the cushion can be supported by the biasing force of the first spring 11e. Similarly, since the second wire-shaped member 12d is attached to the pair of second cylindrical portions 12b and 12c via the pair of second springs 12e, tension in the vehicle width direction is applied to the second wire-shaped member 12d. , the load transmitted from the cushion can be supported by the biasing force of the second spring 12e.

According to the wheelchair 100 of this embodiment, since the arrangement interval of the first wire-shaped members 11d is narrower than the arrangement interval of the second wire-shaped members 12d, the first seat surface 11a is higher than the second seat surface 12a. It has load-bearing capacity. Therefore, the load of the user can be reliably supported by the first seat surface 11a arranged at a position where a large amount of the user's load is transmitted.

According to the wheelchair 100 of this embodiment, the length of the seat surface that supports the cushion for the user to sit on can be adjusted in the traveling direction, and the inclination angle (tilt angle) of the seat surface portion 10 with respect to the installation surface and the seat By adjusting the angle (reclining angle) formed by the surface portion 10 and the upper frame 52 to an arbitrary angle, the user can easily assume a desired posture.

The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the claims. Some of the configurations of the above embodiments may be omitted, or may be arbitrarily combined in a manner different from the above.

DESCRIPTION OF SYMBOLS 10... Seat surface part 11... 1st seat surface frame 11a... 1st seat surface 11b, 11c... 1st cylinder part 11d... 1st wire-shaped member 12... Second seat frame 12a Second seat 20 Seat 21 Backrest 22 Lumbar support 23 Headrest 30 Rear wheel 40 Front wheel 50 Frame 51 Base frame 52 Upper frame 60 Armrest 70 Handle 71 Lever 80 Foot support part 91 Inner cushion 91a First cushion member 91b Second cushion member 91c Connecting part 92 Outer cushion 100 Wheelchair X1 ···axle

Claims (2)

a seat part that supports a cushion for the user to sit on;
a pair of wheels rotating about an axle;
A frame portion that supports the seat surface portion and the pair of wheels,
The seat portion is
a first seating surface frame attached to the frame portion and forming a first seating surface;
a second seat frame that is movably attached to the first seat frame in a traveling direction that intersects with the axle and that forms a second seat surface;
a sheet-like member attached to the first seat frame and the second seat frame;
The sheet-like member is stored when the first seat surface and the second seat surface are arranged close to each other, and the second seat surface is positioned in the traveling direction with respect to the first seat surface. forming a third seat surface that supports the cushion between the first seat surface and the second seat surface in an extended state when the seat is moved forward;
The cushion is
a first cushion member supported by the first seat surface;
a second cushion member arranged on the front side in the direction of travel relative to the first cushion member;
a connecting portion that connects the first cushion member and the second cushion member so that the second cushion member can move in the traveling direction with respect to the first cushion member;
Unlike the first cushion member and the second cushion member, the connecting portion has a thin structure that can be folded and stored between the first cushion member and the second cushion member,
The third seat surface supports the second cushion member when the second seat surface moves forward in the traveling direction with respect to the first seat surface,
The first seat surface frame is
a pair of first cylindrical portions extending in the traveling direction and arranged at a predetermined interval in the vehicle width direction along the axle;
a plurality of first wire-shaped members attached to one and the other of the pair of first tubular portions and arranged along the vehicle width direction;
forming the first seat surface by arranging the plurality of first wire-shaped members at intervals in the traveling direction;
The second seat surface frame is
a pair of second cylindrical portions extending in the traveling direction and arranged at the predetermined interval in the vehicle width direction;
a plurality of second wire-shaped members attached to one and the other of the pair of second cylindrical portions and arranged along the vehicle width direction;
forming the second seat surface by arranging the plurality of second wire-shaped members at intervals in the traveling direction;
The arrangement interval of the plurality of first wire-shaped members in the traveling direction is narrower than the arrangement interval of the plurality of second wire-shaped members in the traveling direction,
The sheet-like member has an end on the front side in the direction of travel attached to the second wire-like member adjacent to the first seat surface, and an end on the rear side in the direction of travel attached to the second seat surface. It is attached to the first wire-like member that is close to the wire-like member, and no wire-like member is arranged between the attached second wire-like member and the first wire-like member,
When the second seat surface and the second cushion member move in the advancing direction, the sheet-like member does not support the connecting portion, and the connecting portion is supported by the first wire-like member. A wheelchair characterized by: The first wire-shaped member is attached to the pair of first tubular portions via a pair of first elastic members provided at both ends in the vehicle width direction,
2. The apparatus according to claim 1, wherein the second wire-like member is attached to the pair of second tubular portions via a pair of second elastic members provided at both ends in the vehicle width direction. wheelchair.

Images