JPH05337154A - Wheel chair - Google Patents

Abstract

PURPOSE:To provide a wheel chair which is highly convenient in a training for restoring a function disordered while enabling use ideally for a long time by adjusting angles of sitting and a back optimally. CONSTITUTION:This wheel chair is provided with a front frame 10 which has a front pipe part 11 extending vertically and a pair of front wheels mounted thereon and a rear frame 20 which has a rear pipe section 21 extending vertically and a pair of rear wheels mounted thereon while the upper end thereof is pivoted on the front frame 10 so as to spread gradually downward in a sector. A pair of front sliders 35 are so arranged to be fitted externally onto the front pipe part 11 in a slidable manner and a pair of rear sliders 37 are so arranged to be fitted externally onto the rear pipe part 21 in a slidable manner. A sitting angle adjusting mechanism is provided and comprises a sheet frame 30 which is allowed to oscillate longitudinally and a sitting angle locking mechanism 40 which is allowed to fix oscillation of the sheet frame 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair that can take a relaxed posture.

[0002]

2. Description of the Related Art Heretofore, there has been a reclining wheelchair in which a caregiver manually pushes the chair so that the backrest can be tilted backward to take a relaxed posture. Such a reclining wheelchair is generally configured to change only the back angle of the backrest while keeping the seat angle of the seat unchanged.

[0003]

[Problems to be Solved] However, in such a conventional wheelchair, since the seat angle of the seat does not change by tilting only the backrest, when a child with cerebral palsy is used, depending on the degree of the disability, the user may be uncomfortable. There was a problem that the sitting position became unstable due to voluntary tension. Therefore, a wheelchair is proposed in which the relative angle between the seat and the backrest is fixed, and the back angle of the backrest and the seat angle of the seat are changed at the same time (see, for example, JP-A-64-85649).

However, in the wheelchair having this structure, the relative angle between the seat and the backrest is always constant, so that there is a problem that some users cannot endure a long sitting time.

The present invention has been made in view of the above problems, and provides a wheelchair which can be used suitably for a long time by adjusting the sitting angle and the back angle to the optimum angles and is convenient for the function recovery training which is impaired. The purpose is to do.

[0006]

The present invention has been made to achieve the above object, and a reclining wheelchair of the first invention has a pair of front pipe portions which extend in the up-down direction relative to the left and right. A front frame to which the front wheels are attached, and a pair of rear wheels having left and right oppositely extending rear pipe portions extending in the vertical direction are attached, and an upper end portion is pivotally attached to an upper end portion of the front frame to spread downward. A wheelchair provided with a rear frame provided, wherein a pair of front sliders pivotally attached to the left and right front end portions and slidably provided outside the front pipe portion and pivotable to the left and right rear end portions. A pair of rear sliders that are attached to the rear pipe portion and are slidably provided on the rear pipe portion, and correspond to sliding of the front slider in one direction in the vertical direction. A seat angle adjusting mechanism including a seat frame provided with a slider slidable in another direction up and down and swingable in the front-rear direction, and a seat angle locking mechanism provided so as to fix the swing of the seat frame. A wheelchair characterized by comprising:

A reclining wheelchair according to a second aspect of the invention is a wheelchair having a back frame which is tiltable rearward, and has an axis extending in the front-rear direction and is swingable in the axial direction. A pair of left and right slide pipes,
A pair of left and right armrest pipes, which are fitted in the slide pipes and are slidable in the front-rear direction, and whose rear end portions are pivotally attached to the middle part of the back frame, and the armrest pipes are slidably fixed. A wheelchair characterized by comprising a back angle adjusting mechanism including the above-mentioned back angle locking mechanism.

A reclining wheelchair according to a third aspect of the present invention includes a front frame having a front pipe portion extending in the up-down direction facing left and right, and a front frame having a pair of front wheels attached thereto, and a rear pipe portion extending in the up-down direction facing left and right. And a rear frame having a pair of rear wheels attached thereto, an upper end of which is pivotally attached to an upper end of the front frame and which is provided so as to spread downward toward the front. And a pair of front sliders externally fitted to the front pipe portion and slidably provided, and a pair of rear sliders pivotally attached to the left and right rear end portions and slidably provided externally to the rear pipe portion. A seat having a slider and provided so that the rear slider slides in the other vertical direction and can swing in the front-back direction in response to the sliding of the front slider in the one vertical direction. A seat angle adjustment mechanism including a frame and a seat angle lock mechanism that can fix the swing of the seat frame is provided, and a back frame that is tiltable rearward and an axis line extending in the front-rear direction. And a pair of left and right slide pipes that are provided so as to be swingable in the axial direction thereof, and are provided so as to be fitted into the slide pipes so as to be slidable in the front-rear direction and have a rear end portion pivoted to a central portion of the back frame. A wheelchair comprising a pair of left and right armrest pipes and a back angle lock mechanism provided so as to fix the sliding of the armrest pipe, and a back angle adjusting mechanism.

[0009]

The present invention is configured as described above. In the seat angle adjusting mechanism, when the front end portion of the seat frame is raised, the front slider slides on the front pipe portion and rises,
The rear slider slides down the rear pipe portion and descends, and the rear end portion of the seat frame descends. When the rear end of the seat frame is raised, the rear slider slides up and the front slider slides down, contrary to the above. The swinging of the seat frame is performed with the center of the longitudinal length of the seat frame as the center of rotation, and the seat angle of the seat frame is fixed by the seat angle lock mechanism.

In the back angle adjusting mechanism, when the back frame is tilted rearward, the armrest pipe is moved rearwardly. This movement of the armrest maintains lateral body support, and the back angle locking mechanism fixes the back angle of the back frame.

Further, as the seat angle of the seat frame changes, the armrest pipe interlocks via the lower portion of the back frame, and the armrest pipe inclines in the seat frame inclining direction.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view of a wheelchair according to one embodiment equipped with a seat angle adjusting mechanism and a back angle adjusting mechanism of the present invention, FIG. 2 is a front view, and FIG. 3 is a plan view.

In the wheelchair indicated by reference numeral 1 in the drawing, a front frame 10 to which a pair of front wheels 19 are attached, a rear frame 20 to which a pair of rear wheels 29 are attached and whose upper end is pivotally attached to the front frame 10, A seat frame 30 having a pair of left and right front sliders 33 and a pair of left and right rear sliders 35, and a seat angle locking mechanism 40.
A back frame 50 that can be tilted rearward, a pair of left and right slide pipes 60 that can swing in the axial direction, and a slide pipe 60 that is fitted and slid while the rear end is pivotally attached to the back frame 50. Armrest pipe 65
And a back angle lock mechanism 70 as main components, and a seat angle adjustment mechanism is configured by the front frame 10 and the rear frame 20, the seat frame 30, and the seat angle lock mechanism 40. The slide pipe 60, the armrest pipe 65, and Back angle lock mechanism 70
The back angle adjusting mechanism is configured by the above.

The front frame 10 has a pair of right and left front pipe parts 11 which are provided with a plurality of locking holes 12 linearly formed at predetermined positions and a horizontal shaft 13 fixed thereto. And is formed on the frame. A pair of front wheels 19 made of caster wheels are attached to the lower end of the front frame 10.

The rear frame 20 has rear pipe portions 21 and 21 which are bent in a U shape and face each other on the left and right sides, and a pair of rear wheels 29 are attached to a lower end portion thereof. Rear frame 2
The upper end of 0 has a shaft 23 on the upper end of the front frame 10.
When the wheelchair 1 is in use,
As shown in FIG.
The lower end portion of the rear frame 20 extends forward, and the lower end portion of the rear frame 20 extends rearward to form a divergent shape.

This divergent shape is formed so that it can be maintained by a stopper 25 that can be bent upward by the bending portion 25a. The front end of the stopper 25 is pivotally attached to the middle of the front pipe portion 11 by a shaft 26 and the rear end. The portion is pivotally attached to the lower end portion of the rear pipe portion 21 by a shaft 27. The front frame 10 is bent by the bending of the stopper 25.
The lower end of the rear frame 20 and the lower end of the rear frame 20 are close to each other and are formed in a folded state. Note that reference numeral 2
2 is a stop ring that defines the upper limit of sliding of the rear slider 37.

The seat frame 30 has a pair of seat pipe parts 31 facing each other in the front-rear direction, and the seat pipe part 3
A cross member 32 is fixedly attached to the frame 1 to form a frame. A seat 33 is stretched on the upper surface of the seat frame 30.

The front slider 35 has a front pipe portion 11
A cylindrical member 35a made of a synthetic resin for smoothing the sliding is provided on the inner peripheral surface thereof. A seat angle lock mechanism 40 is attached to the front slider 35, and a locking pin 41 thereof is provided so as to be able to advance and retract into the locking hole 12 of the front pipe portion 11 from the inner peripheral surface of the front slider 35. There is. The front slider 35 is rotatably attached to the left and right side surfaces of the front end portion of the seat frame 30 by a shaft 36 having a horizontal axis line.

The rear slider 37 is made of a tubular member which is fitted onto the rear pipe portion 21 and is slidable, and a cylindrical member made of synthetic resin for smoothing sliding is provided on the inner peripheral surface thereof. .. The rear slider 37 has a shaft 3 having a horizontal axis on the left and right side surfaces of the rear end portion of the seat frame 30.
It is attached so as to be rotatable by 8. As a result, the seat frame 30 is formed so as to be swingable between the substantially horizontal position and the front end portion of the seat frame 30 at an upward position of about 40 degrees.

The seat angle lock mechanism 40 always has the locking hole 1
2 has a locking pin 41 that is advanced into the inside of the locking hole 2 and is urged so that it can be engaged, and by operating the release lever 43, the engagement can be released by retracting from the inside of the locking hole 12 through the release wire 44. Is configured. By selecting the plurality of locking holes 12, the vertical position of the front slider 35, that is, the seat angle of the seat frame 30 can be selected and fixed.

The lower end of the back frame 50 is pivotally attached to the rear end of the seat frame 30 by a shaft 54,
A backrest 52 is stretched on the front surface of the back frame 50. A handle 55 for a caregiver to push by hand is provided on the upper end of the back frame 50 so that the vertical position can be adjusted by a fixing screw 56.

The slide pipe 60 is made of a tubular member slidably fitted with the armrest pipe 65, and the inner peripheral surface of the tubular member 6 is made of synthetic resin for smooth sliding.
0a is installed. In this slide pipe 60,
A back angle lock mechanism 70 is attached, and a locking pin 71 thereof is provided so as to be able to advance and retract from the inner peripheral surface of the slide pipe 60 into a locking hole 66 of an armrest pipe 65 described later. And a pair of slide pipes 60
Are swingably attached by shafts 23 with their axes oriented in the front-rear direction. As a result, the back frame 50 is formed so as to be tiltable between the substantially upright position and the rearward substantially horizontal position.

The armrest pipe 65 is made of a straight tubular member which can be fitted into the slide pipe 60, and a plurality of locking holes 66 are linearly formed at predetermined positions. The rear end of the armrest pipe 65 is attached to the back frame 50 by the shaft 69.
It is pivotally attached to the middle part of the
The pad 67 is fixed via 8 and 68.

The back angle lock mechanism 70 is always provided with the locking hole 6
6 has a locking pin 71 that has been advanced into 6 and is urged so that it can be engaged, and by operating a release lever 73, it is possible to retreat from the inside of the locking hole 66 via a release wire 74 and release the engagement. Is configured. By selecting the plurality of locking holes 66, the front and rear positions of the armrest pipe 65, that is, the back angle of the back frame 50 can be selected and fixed.

Further, the wheelchair 1 is provided with a brake mechanism 75, a footrest 80 and a headrest 85 as shown in the figure.

The brake mechanism 75 is mounted on the lower end of the rear frame 20, and is configured to brake the rotation of the rear wheel 29 via the brake wire 77 by operating the brake lever 76 provided on the handle 55. Has been done. The brake mechanism 75 is configured to be able to hold the braking state of the rear wheel 29 by pressing the brake lever 78, and this braking state is released by operating the release pedal 79.

The footrest 80 has a foot base 81 that can be folded upward by rotating upward, and the mounting angle thereof can be adjusted rearward by a knee angle adjusting plate 82 so that the seat frame 30 can be adjusted.
It is attached to the front end of the.

The headrest 85 has a head rest 86 and is configured to be adjustable in vertical position, front-back position, and left-right position, and is mounted on the upper part of the back frame 50.

Next, a usage mode of the wheelchair configured as described above will be described.

FIG. 1 shows one mode of use of the wheelchair 1. The lower ends of the front frame 10 and the rear frame 20 have a divergent shape, and the stopper 25 maintains the shape. The seat frame 30 is fixed to a substantially horizontal seat angle by a back angle lock mechanism 40, and the back frame 50 is fixed to a substantially upright back angle by a back angle lock mechanism 70. The armrest pipe 65 holds the state in which it is parallel to the seat frame 30. Further, the headrest 85 is fixed in position by appropriately adjusting the vertical, front-rear, and left-right positions of the head rest 86.

In order to adjust the seat angle of the seat frame 30, first, the release lever 43 of the seat angle lock mechanism 40 is operated to retract the locking pin 41 and remove it from the currently engaged locking hole 12. To do.

Then, the front end of the seat frame 30 is lifted to move the front slider 35 upward. At this time, the seat frame 30 swings about the center of the length in the front-rear direction as the center of rotation, and the rear end portion of the seat frame 30, that is, the rear slider 37 descends by an amount corresponding to the above. Then, at the desired seat angle, the locking pin 41 is advanced into and engaged with the other locking hole 12, and the seat frame 3
Fix 0 to its seat angle (see Figure 6).

The rear end of the armrest pipe 65 is interlocked with the change in the height position of the rear end of the seat frame 30, and the axis of the armrest pipe 65 is the seat frame 3.
It slopes with a slope of 0. The seat frame 30
In order to return the seat to the horizontal state, the rear end of the seat frame 30 is lifted opposite to the above.

In order to adjust the back angle of the back frame 50, first, the release lever 73 of the back angle locking mechanism 70 is operated to retract the locking pin 71 and remove it from the currently engaged locking hole 66. To do. Then, when the back frame 50 is tilted rearward, the armrest pipe 65 moves rearward accordingly. Then, at the desired back angle, the locking pin 71 is advanced into and engaged with the other locking hole 66, and the back frame 50 is fixed at that back angle (see FIG. 7). At this time, the armrest pipe 65 is on the side of the inclined back frame 50 to support the user's body.

When simultaneously adjusting both angles of the seat frame 30 and the back frame 50, the seat angle lock mechanism 40 is used.
The release lever 43 and the release lever 73 of the back angle lock mechanism 70 are simultaneously operated to release the lock. Next, the back frame 50 is pushed down in a substantially vertical direction to tilt the back frame 50 rearward while lowering the rear end of the seat frame 30. As a result, the passenger can take a relaxed posture without changing the relative angle between the seat frame 30 and the back frame 50.

In order to put the wheelchair 1 into the folded state, the bending portion 25a of the stopper 25 is first lifted upward to bend it from the use state of FIG. 1, and the release lever 73 of the back angle lock mechanism 70 is operated to operate it. The lock of the back frame 50 by the stop pin 71 is released.

When the back frame 50 is pushed down in a substantially vertical direction while the back angle lock mechanism 70 is unlocked, the front slider 35 is moved downward while the rear slider 37 is engaged with the frant pipe 11. As a result, the back frame 50 and the rear frame 20 are in a vertical state and are close to each other, and the rear end of the armrest pipe 65 is lowered to be in a vertical state along the back frame 50. In the seat frame 30, the rear slider 37 descends and the front slider 35 moves above the seat frame 30 to be in a substantially vertical state, and the front slider 35 draws the front frame 10 rearward so that the seat frame 30 is closest to the rear frame 20. Move to the folded position.

In this way, the front frame 10, the rear frame 20, the seat frame 30, the back frame 5
0, the armrest pipe 65 is in a substantially vertical state and overlaps with the front and rear, and the pair of front wheels 19 is stored in the inner space of the pair of rear wheels 29. Then, the knee angle adjusting plate 81 is adjusted to bend the footrest 80 to the seat frame 30 side, and the footrest 81 is rotated upward to form the folded state of the wheelchair 1 (see FIG. 8).

[0040]

As described above, the present invention has the following effects.

According to the seat angle adjusting mechanism, since the seat frame is swung about the center of the longitudinal direction of the seat frame as the center of rotation, the angle can be adjusted with a light operating force, and the seat angle can be adjusted while the user is on board. Changes can be made easily.

According to the back angle adjusting mechanism, since the armrest pipe moves forward and backward as the back frame tilts, the user can be surely supported laterally. Further, the armrest pipe can be tilted in association with the tilting direction as the seat angle changes.

Further, by providing both the seat angle adjusting mechanism and the back angle adjusting mechanism, it is possible to take a relaxed posture without changing the bending angle of the hip joint.

As described above, according to the present invention, the sitting angle and the back angle of the wheelchair can be adjusted to the optimum angles for the user's body shape, and the posture can be easily changed while the chair is still in use for a long time. can do. In addition, by setting the sitting angle and back angle according to the individual body shape of the user,
It has the effect of being able to perform functional recovery training that has been impaired.

[Brief description of drawings]

FIG. 1 is a side view of a wheelchair according to an embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a side sectional view illustrating a seat angle locking mechanism.

FIG. 5 is a side sectional view illustrating a back angle lock mechanism.

FIG. 6 is a side view illustrating seat angle adjustment.

FIG. 7 is a side view illustrating back angle adjustment.

FIG. 8 is a side view showing a folded state.

[Explanation of symbols]

 1 Wheelchair 10 Front Frame 11 Front Pipe 20 Rear Frame 21 Rear Pipe 30 Seat Frame 35 Front Slider 37 Rear Slider 40 Seat Angle Lock Mechanism 50 Back Frame 60 Slide Pipe 65 Arm Rest Pipe 70 Back Angle Lock Mechanism

Claims (3)

[Claims] 1. A front frame having a front pipe portion extending in the vertical direction facing left and right, to which a pair of front wheels is attached, and a rear frame having a rear pipe portion extending vertically facing to the left and right, attaching a pair of rear wheels. And a rear frame whose upper end is pivotally attached to the upper end of the front frame and is provided so as to spread downward toward the front, and which is pivotally attached to the left and right front ends and is external to the front pipe part. A pair of front sliders that are fitted and slidably provided, and a pair of rear sliders that are pivotally attached to the left and right of the rear end portion and that are externally fitted to the rear pipe portion and that are slidably provided; A seat frame in which the rear slider is slidable in the other direction of the upper and lower sides in response to the sliding of the slider in one direction of the upper and lower sides and is swingable in the front-back direction; A wheelchair characterized by comprising a seat angle locking mechanism which is capable of fixing movement and a seat angle adjusting mechanism which comprises. 2. A wheelchair provided with a back frame that is tiltable rearward, comprising a pair of left and right slide pipes that have an axis extending in the front-rear direction and are swingable in the axial direction. A pair of left and right armrest pipes, which are fitted into the slide pipes and are slidable in the front-rear direction, and whose rear ends are pivotally attached to the middle part of the back frame, and the armrest pipes are slidably fixed. A wheelchair characterized by comprising a back angle locking mechanism which is provided, and a back angle adjusting mechanism comprising 3. A front frame having a front pipe portion extending left and right in the vertical direction and having a pair of front wheels attached thereto, and a rear frame portion having a rear pipe portion extending vertically in the left and right directions being attached thereto And a rear frame whose upper end is pivotally attached to the upper end of the front frame and is provided so as to spread downward toward the front, and which is pivotally attached to the left and right front ends and is externally fitted to the front pipe part. A pair of front sliders that are slidably provided and a pair of rear sliders that are pivotally attached to the left and right of the rear end portion and that are slidably provided by being fitted onto the rear pipe portion. A seat frame in which the rear slider is slidable in the other direction of the upper and lower sides so as to be swingable in the front-back direction in response to the sliding of the seat frame in one of the upper and lower directions; Is equipped with a seat angle lock mechanism that can be fixed, and a seat angle adjustment mechanism that consists of, a back frame that is tiltable backward, and an axis that extends in the front-rear direction A pair of left and right slide pipes that are movably provided, and a pair of left and right armrest pipes that are fitted into the slide pipes and that are slidable in the front-rear direction and that have rear ends pivotally attached to the middle of the back frame. A wheelchair characterized by comprising a back-angle locking mechanism provided so as to be able to fix the sliding of the armrest pipe, and a back-angle adjusting mechanism comprising: