JP3559211B2 - wheelchair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wheelchair. More specifically, the present invention relates to a wheelchair in which the seat tilts while a user is seated.
[0002]
[Background Art and Problems to be Solved by the Invention]
As shown in FIG. 8, the wheelchair 51 of the prior art has an axle 53a of a large-diameter driving wheel 53 rotatably attached to the rear part of a main body frame 52. In the self-propelled type, the driving wheel 53 is rotated by the user, and in the electric type, the driving wheel 53 is rotationally driven by a motor. The seat frame 54 includes a seating frame 55 and a back seat frame 56. The seat frame 55 and the back seat frame 56 are constituted by pipe members disposed on the left and right sides of the main body frame 52, respectively. Flexible seating surface members 57 for the user to sit on are hung on the left and right pipe members. The flexible seat member 57 is formed of a cloth or a synthetic resin sheet.
[0003]
In the figure, the main body frame 52 is composed of a rear support column indicated by reference numeral 58, an elbow support frame indicated by reference numeral 59, a front support column 60 integrated with the elbow support frame 59, a horizontal frame 61, a lower frame 62, This is an X frame 63 that can rotate relative to each other. The back seat frame 56 is pivotally supported so as to tilt backward with respect to the horizontal frame 61.
[0004]
A seating frame 55 is fixed to the upper end of the X frame 63, and the lower end of the X frame 63 is rotatably attached to the main body frame 52 (lower frame 62). Since only the X frame 63 that can rotate relative to each other connects the left and right portions of the seat frame 54 and the main body frame 52, the wheelchair can extend and contract in the width direction.
[0005]
As described above, the conventional wheelchair 51 is a reclining type in which only the back seat frame 56 is tilted backward. Therefore, for a user who is difficult to maintain his / her posture by himself / herself, when the back seat frame 56 is tilted backward, the body may slide forward (in the direction of the foot) on the seat. Further, even a normal user slips if there is little friction between the body and the seat surface.
[0006]
In addition, it is difficult for a user who is difficult to hold his / her posture by himself / herself to move in a stable state unless the wheelchair is equipped with a special body holder.
[0007]
The present invention has been made to solve such a problem, and it is an object of the present invention to provide a reclining wheelchair that can stabilize the body of the user, making it difficult for the user's body to slip forward even when reclined (tilt backward). It is said. It is another object of the present invention to provide a wheelchair that can keep a user's body in a relatively stable state even in a state where no reclining is performed.
[0008]
[Means for Solving the Problems]
The wheelchair of the present invention is
A main body frame; and a seat frame attached to the main body frame, the seat frame having a seating portion and a back seat portion, and the seating portion from the middle portion to the front seating portion in front From the middle part to the rear seat part, and the rear seat part is integrated with the back seat part and tilts downward with respect to the front seat part from a state extending in the same direction as the front seat part in a side view. It is configured to be able to .
[0009]
Therefore, it is possible that the posture of the user, to the reclining by changing the angle between the upper and lower body, which was on the border of the hip joint. In that case, it can incline back with a back seat part from a rear seat part. Therefore, since the user's buttocks fall well into the inclined rear seat, the body is prevented from sliding forward even if the angle between the upper body and the lower body is increased .
[0010]
In the wheelchair described above, a wheelchair in which an intermediate portion of the seating portion is attached to the main body frame so that the seating portion and the back seat portion of the seat frame can be integrally tilted with respect to the main body frame is preferable. In the wheelchair, it is preferable that the tilting position in the front-rear direction of the rear seating portion with respect to the front seating portion can be set to an arbitrary position.
[0011]
The attitude of use for the user, because it is also possible to recline without changing the angle between the upper and lower body, which was on the border of the hip joint. Therefore, the user's body can be kept stable. The intermediate portion is not particularly limited to the central portion in the front-rear direction of the seating portion, and is a portion between the front end and the rear end.
[0012]
In the wheelchair, the flexible seat member spanned between the left and right frame constituting rods constituting the seat frame, and at least both sides of the flexible seat member corresponding to the back seat along the side edge And the system attachment portion can be attached to an arbitrary portion of the flexible sheet member after the periphery of the frame constituting rod has been rotated. It is preferable that the tension can be adjusted.
[0013]
Over the head from the foot of use for the user, because it is possible to correct the posture for any of the sites, the attitude it is possible to sink the body between the left and right of the frame configuration bar can also be stabilized.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the wheelchair of the present invention will be described with reference to the accompanying drawings.
[0015]
FIG. 1 is a perspective view showing a frame of a wheelchair according to an embodiment of the present invention. 2 and 3 are side views of the frame of FIG. FIG. 4A is a side view showing an example of the reclining state of the wheelchair of FIG. 1 (changing the angle of the back seat), and FIG. 4B is a side view showing the main part thereof. FIG. 5A and FIG. 5B are side views showing the use state of the wheelchair of FIG. FIG. 6 is a front perspective view of the wheelchair of FIG. 7 is a rear perspective view of the wheelchair of FIG.
[0016]
The frame of the wheelchair 1 shown in FIGS. 1 to 3 includes a main body frame 2 and a seat frame 3. The main body frame 2 is composed of front and rear frames 2b and 2c pivotally supported at the upper end 2a so as to be tilted and folded (indicated by an arrow A in FIG. 2). The front frame 2b and the rear frame 2c are also connected by a folding bar 2d. The folding bar 2d is composed of two bars that can swing relative to each other, and the ends of the two bars are pivotally supported by a front frame 2b and a rear frame 2c, respectively. A front wheel 4 is attached to the lower end of the front frame 2b, and a rear wheel 5 is attached to the lower end of the rear frame 2c.
[0017]
The seat frame 3 includes a seat portion 6 on which a user is seated, a back seat portion 7 on which the user leans back, and a leg portion 8 along the user's foot. The vicinity of the upper end of the back seat 7 is curved backward to form a grip 7a for an assistant. A foot plate 9 that can be folded upward is attached to the lower end of the leg 8. The mounting position of the foot plate 9 can be adjusted in a plurality of stages along the longitudinal direction of the leg portion 8 by bolting or pinning (indicated by symbol P in FIG. 2). The seating portion 6 is composed of a front seating portion 6a and a rear seating portion 6b. The rear seating portion 6b has a plurality of stages by bolting or pinning (indicated by symbol P in FIG. 2) with respect to the front seating portion 6a. (Indicated by an arrow B in FIG. 2). In this embodiment, it is inclined in three stages. That is, the angle change of the back seat part 7 is made from the intermediate part of the seat part 6.
[0018]
As is apparent from FIG. 4 as well, the back seat portion 7 and the rear seat portion 6b are integrally tilted rearward by the above configuration, so that the user can move the upper body and lower body from the hip joint. The angle can be changed. In addition, since the front seating portion 6a does not move, the user does not have his buttocks fall into the joint between the rear seating portion 6b and the back seat portion 7, and the body will not slide forward.
[0019]
The back seat portion 7 is pivotally supported by a bracket 10 in the vicinity of the rear end of the rear seat portion 6b so as to be folded forward with respect to the rear seat portion 6b (indicated by an arrow C in FIG. 2). The bracket 10 is provided with a lock bar 11 that fixes the back seat 7 to a use position that is substantially perpendicular to the rear seat 6b. By pressing the lower end position of the back seat portion 7 with the tip of the lock bar 11, folding of the back seat portion 7 is prevented. With this configuration, the wheelchair 1 becomes compact and easy to carry by folding the back seat 7 forward (arrow C in FIG. 2) and folding the main body frame 2 to each other (arrow A in FIG. 2). .
[0020]
The leg portion 8 has an L shape, and an upper horizontal portion 8a thereof is fitted into the front seat portion 6a. Then, by moving the leg portion 8 back and forth with respect to the front seating portion 6a (indicated by an arrow D in FIG. 2), the front-rear direction dimension of the seating portion can be changed. The change position can be adjusted in a plurality of stages by bolting or pinning (indicated by symbol P in FIG. 2).
[0021]
Further, the seat frame 3 configured as described above is pivotally supported so as to be integrally swingable with respect to the main body frame 2 (indicated by an arrow E in FIG. 3). Further, the main body frame 2 and the seat frame 3 are also connected by a so-called mechanical lock cylinder 12. Therefore, the inclined position of the seat frame 3 with respect to the main body frame 2 can be continuously changed and locked at that position. In the mechanical lock cylinder 12, the base end portion of the cylinder body 12a and the tip end portion of the piston 12b are attached to the front frame 2b and the rear seating portion 6b by the swing arm 13, respectively. With this configuration, as shown in FIG. 5, the user can be reclined without changing his / her posture.
[0022]
The mechanical lock cylinder 12 has a coil spring (not shown) housed in a cylindrical cylinder body 12a along its axial direction. The piston 12b is inserted into the hollow portion of the coil spring in the cylinder body 12a. Since the coil spring normally holds the piston inside the coil spring, the piston 12b is locked by the frictional force from the inner diameter side of the coil spring. However, when releasing the lock to reclaim the seat frame 3, the lock release handle 14 shown in FIGS. 1 and 7 is operated to expand the inner diameter of the coil spring via the control cable 15. Then, the coil spring releases the grip of the piston 12b.
[0023]
In the present embodiment, the configuration in which the angle of the back seat portion 7 is changed from the intermediate portion of the seat portion 6 is exemplified by a step change by bolting or pinning, but is not particularly limited to such a step change. . For example, it is also possible to employ a configuration in which the mechanical lock cylinder 12 is continuously used instead of bolting or pinning.
[0024]
Each of the frames 2 and 3 shown in FIGS. 2 and 3 includes a pair of left and right frame constituting bars as shown in FIG. 6 and 7, flexible seat members 16 are stretched between the left and right sides of the back seat 7, the seat 6, and the legs 8 of the seat frame 3, respectively. The flexible sheet member 16 is provided with a large number of system wearing portions 17 along the left and right side edges. Each system wearing portion 17 is formed of a cloth similar to the flexible sheet member 16 or a synthetic resin sheet. Each system seating part 17 can systematize the back seat part 7, the seating part 6, and the leg part 8 to an arbitrary part on the back surface of the flexible sheet member 16 by turning outward from the front. A so-called magic tape (also referred to as a hook-and-loop fastener) that attaches to each other is attached to the back surface of the system wearing portion 17 and the back surface of the flexible sheet member 16. The magic tape forms a thin synthetic fiber loop on the back surface of the flexible sheet member 16 (the back surface of the system attachment portion 17), and the synthetic fiber on the back surface of the system attachment portion 17 (the back surface of the flexible sheet member 16). The hook is formed. It is preferable to attach a velcro tape almost to the front surface of the flexible sheet 16. By doing so, the system wearing part 17 can be system-attached to the part of the back of the flexible sheet 16 to the person.
[0025]
As shown in FIG. 7, the system wearing part 17 has a considerable length in the lateral direction, and the system wearing part on the back surface of the flexible sheet 16 is shifted laterally (indicated by an arrow F in FIG. 7). ), The tension of the flexible sheet 16 can be adjusted. Since a large number of system wearing parts 17 are arranged, it is possible to adjust only the tension of an arbitrary part of the flexible sheet 16. For example, as shown in FIG. 5A, if the tension of the flexible sheet 16 of the back seat 7 is loosened so that the user's body is buried between the back seats 7, the action of holding the body can be achieved. Arise. Further, in order to adapt to the shape of the user's spine, as shown in FIG. 5 (b), it is possible to strengthen the lower part of the back seat portion 7, that is, the tension around the user's waist. Furthermore, it is also possible to stabilize the seating state of the user by loosening the tension of the seating portion 6.
[0026]
As described above, the tension of the flexible sheet 16 can be continuously adjusted by using the magic tape, but may be adjusted at a predetermined pitch by arranging so-called snaps at a predetermined pitch.
[0027]
【The invention's effect】
According to the present invention, it is possible to recline the posture of the user without changing the angle between the upper body and the lower body with the hip joint as a boundary. Therefore, the user's body can be kept stable.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a frame of an embodiment of a wheelchair according to the present invention.
FIG. 2 is a side view of the frame of FIG.
FIG. 3 is a side view of the frame of FIG. 1;
4 (a) is a side view showing an example of the reclining state of the wheelchair of FIG. 1 (changing the angle of the back seat), and FIG. 4 (b) is a side view showing the main part thereof.
5 (a) and 5 (b) are side views showing the use state of the wheelchair of FIG. 1, respectively.
6 is a front perspective view of the wheelchair of FIG. 1. FIG.
7 is a rear perspective view of the wheelchair of FIG. 1. FIG.
FIG. 8 is a perspective view showing an example of a conventional wheelchair.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Wheelchair 2 ... Main body frame 2a ... Upper end part 2b (of main body frame) ... Front frame 2c ... Rear frame 2d ... Folding bar 3 ... Seat frame 4 ··· Front wheel 5 ··· Rear wheel 6 ··· Seating portion 6a · · · Front seating portion 6b · · · Rear seating portion 7 · · · Back seat portion 7a · · · Grip 8 · ... Leg 9 ... Foot plate 10 ... Bracket 11 ... Lock bar 12 ... Mechanical lock cylinder 12a ... Cylinder body 12b ... Piston 13 ... Swing Moving arm 14... Unlocking handle 15... Control cable 16... Flexible sheet member 17.

Claims (4)

Body frame ,
A seat frame attached to the main body frame ,
The seat frame has a seat portion and a back seat portion;
The seat comprises a front seat in front from the middle and a rear seat in the rear from the middle, and the rear seat is integrated with the back seat and extends in the same direction as the front seat in side view. The wheelchair comprised so that it can tilt below with respect to a front seating part from a state . The wheelchair according to claim 1, wherein an intermediate portion of the seating portion is attached to the main body frame so that the seating portion and the back seat portion of the seat frame are integrated and tiltable in the front-rear direction with respect to the main body frame. The wheelchair according to claim 1 or 2, wherein a tilting position in a front-rear direction of the rear seating portion with respect to the front seating portion can be set to an arbitrary position. A flexible sheet member spanned between the left and right frame constituting bars constituting the seat frame, and at least both side edges of the flexible sheet member corresponding to the back seat portion are formed along the side edges. The system wearing part and
By said system attaching portion can be Keigi to any site of the flexible sheet member after having turned around the frame structure bars, claim 1, tension adjustment of the flexible sheet member is configured to be capable of 4. The wheelchair according to any one of the three items .

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