JP3521881B2 - wheelchair - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair having a structure in which a push handle can be moved from a use position to a nonuse position with respect to a wheelchair component.

[0002]

2. Description of the Related Art A handwheel handle for a wheelchair is generally provided on the upper part of the wheelchair so as to project rearward so that a caregiver can easily push the wheelchair. However, when the wheelchair is not moved, for example, when the wheelchair is used as a chair with the wheelchair stopped, the hand push handle protruding rearward becomes an obstacle. In order to improve this point, there is a wheelchair in which the grip of the hand push handle is rotatable between a use position in which it is projected rearward and a non-use position.
No. 4 publication (see FIG. 6). Note that FIG.
(A) is a plan view of the handwheel handle of the wheelchair,
FIG. 6B is a plan sectional view thereof, and FIG. 6C is an overall plan view of the wheelchair.

As shown in FIGS. 6 (A) and 6 (B), the hand push handle 52 has a fixing metal fitting 53 fixed to the rear vertical frame 51 of the wheelchair 50, and a rotating pin 56 and the like on the fixing metal fitting 53. 54 attached so that it can be rotated horizontally
It has and. A locking mechanism 60 that locks the grip 54 with respect to the fixing metal fitting 53 in a use position (a position where the grip 54 faces rearward) is provided between the grip 54 and the fixing metal fitting 53. The lock mechanism 60 is held in a locked state by elastically fitting the tip end portion of the lock pin 64 attached to the grip 54 into the through hole 62 formed in the fixing fitting 53. Further, the lock release lever 66 pulls out the lock pin 64 of the grip 54 from the through hole 62 of the fixing member 53 against the elastic force, whereby the locked state of the lock mechanism 60 is released.
When the locked state is released, the grip 54 is horizontally rotatable from the use position to the width direction position (non-use position) of the wheelchair 50 shown by the chain double-dashed line.

[0004]

However, in the wheelchair 50 described above, the grip 54 of the push handle 52 is locked only in the use position. Therefore, for example, the wheelchair 50
When the vehicle is mounted on a vehicle, the grip 54 rotated to the unused position may swing around the rotating pin 56 due to vibration or the like. If the grip 54 protrudes to the rear of the wheelchair 50 due to the rocking, it may interfere with a passenger located behind the wheelchair 50. The present invention has been made in view of the above problems, and an object of the present invention is to provide a wheelchair that can prevent swing of the hand push handle even when the hand push handle is in the unused position.

[0005]

The above-mentioned problems can be solved by the inventions of the respective claims. The invention according to claim 1 is a wheelchair having a structure in which a hand push handle can be moved from a use position to a non-use position with respect to a wheelchair component, and the hand push handle moves in conjunction with the movement of the hand push handle. An engaging member including a second engaging portion and a wheelchair component, and engages with the first engaging portion when the hand pushing handle is in a use position, and the hand pushing handle is A lock member that engages with the second engaging portion when in the use position, and the engaging member is a hand push handle.
The lock member has a structure that rotates in association with movement of the lock member.
Has a sliding surface on which the
The engaging portion and the second engaging portion are formed in a hole shape.
Is characterized by.

According to the present invention, when the hand push handle is in the use position, the hand push handle is locked to the wheelchair component member by the engaging action of the lock member and the first engaging portion. Therefore, the caregiver can perform the movement operation of the wheelchair using the push handle. That is, the original use of the wheelchair becomes possible. When the engagement between the lock member and the first engaging portion is released and the hand push handle in the use position is moved to the non-use position, the lock member engages with the second engagement portion and the hand push handle. Is locked to the wheelchair component. Therefore, even if the wheelchair is mounted on, for example, a vehicle, the hand push handle in the non-use position does not oscillate unstably due to the influence of vibration or the like. Also, the sliding surface of the engaging member
Since the first engaging portion and the second engaging portion are formed in a hole shape in the
The structure of the joining member can be simplified. It should be noted that all holes are holes.
Notches, etc. are also included.

According to the invention of claim 2 , the engaging member is
Is a cylindrical drive screw that is fixed to the base end of the push handle.
The center axis of the drum is the rotation of the hand push handle.
The center of the lock member is the push hand.
When the drum rotates, it slides relative to the outer peripheral surface of the drum.
It is characterized in that it is movable.

Further, it is preferable that a biasing member for biasing the lock member in the direction of engaging the first engaging portion or the second engaging portion is provided. Further, as described in claim 4, the engagement with the second engagement portion is released by rotating the hand handle in a direction from the non-use position to the use position with a force equal to or more than a predetermined force. It may be configured to. Further, if the stopper for restricting the rotation range of the hand push handle is provided as in claim 5, even if an operating force is applied to the hand push handle in a direction exceeding the rotation range, the lock member or the first engagement is obtained. Force will not be applied to the section or the second engaging section.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION (Embodiment 1) Hereinafter, FIGS.
The wheelchair according to the first embodiment of the present invention will be described based on FIG. In this embodiment, the present invention is applied to a vehicle seat having a wheelchair function (hereinafter referred to as a wheelchair seat), and FIG. 1 (A) is an exploded perspective view of a handwheel handle portion of the wheelchair seat. B) shows an overall schematic perspective view of the wheelchair seat. Further, FIGS. 2 to 4 are side views showing a procedure for rotating the hand handle from a use position protruding rearward to a non-use position folded downward. In the following description, the width direction of the wheelchair seat is the X direction, the front-back direction is the Y direction, and the height direction is the Z direction.

As shown in FIG. 1B, the wheelchair seat 1 is provided with a seat frame 4, and a front wheel 6 and a rear wheel 5 foldably attached to the lower surface of the seat frame 4. A seat 2 including a seat cushion 2a and a seat back 2b is attached to the inside of the seat frame 4, and a pair of hand-pushing handles 10 to be described later are attached to the upper rear portion of the seat frame 4. Further, the seat frame 4 is equipped with a connecting mechanism (not shown) for connecting the wheelchair seat 1 to an outdoor moving device (not shown) provided inside the vehicle.

In order to lower the wheelchair seat 1 from the interior of the vehicle to the outside, the outdoor moving device is driven to move the wheelchair seat 1 from the interior to a predetermined position outside and after the front wheels 6 and the rear wheels 5 are taken out, The connection between the wheelchair seat 1 and the outdoor movement device is released. In this state, the wheelchair sheet 1 can be used as a wheelchair. Further, in order to store the wheelchair seat 1 from the outside into the vehicle cabin, contrary to the above, after connecting the wheelchair seat 1 and the outdoor moving device, the front wheels 6 and the rear wheels 5 are folded and the outdoor moving device is used. The wheelchair seat 1 is moved from the outside to a predetermined position in the room. As a result, the wheelchair seat 1 can be used as a vehicle seat.

Next, referring to FIG. 1A and the like, a mounting structure of the hand push handle 10 to the seat frame 4 will be described. As shown in FIG. 1 (A) and FIG. 2 (A), the hand push handle 10 has a use position that projects rearward,
As shown in FIG. 4, the handle pipe 12 has a structure that can be rotated up and down between an unused position and a handle pipe 12 that is bent in a substantially L shape. Handle pipe 1
Brake lever 14 and grip 13 are attached to 2 at the tip side (the right end side in FIG. 1) of bent portion 12w. The operating force applied to the brake lever 14 is transmitted to the brake main body (not shown) of the rear wheel 5 via the brake wire 14s.

A short cylindrical hinge drum 20 is fixed to the base end of the handle pipe 12 by, for example, welding. The hinge drum 20 is a member arranged at the center of rotation of the push handle 10, and is composed of a cylindrical portion 22, a beam member 24, and a central shaft 26. The cylindrical portion 22 is made of, for example, steel, and the base end portion of the handle pipe 12 is connected to the outer peripheral surface 22r of the cylindrical portion 22 in a substantially tangential direction. Inside the cylindrical portion 22, the cylindrical portion 22
The beam members 24 are arranged in the diameter of the beam member 2.
Both ends of 4 are fixed to the inner peripheral wall surface of the cylindrical portion 22 by welding or the like. The end portion of the beam member 24 on the handle pipe 12 side is referred to as an upper end portion H, and the end portion opposite to the upper end portion H is referred to as a lower end portion K.

The beam member 24, as shown in FIG.
The hinge so that the grip 13 is held in the use position when the beam member 24 is slightly inclined with respect to the vertical line N, that is, when the angle formed by the beam member 24 and the vertical line N is α °. It is fixed to the cylindrical portion 22 of the drum 20.

As shown in FIG. 1A, a through hole 24k is formed at the central position of the beam member 24, and the central axis 26 is inserted into the through hole 24k so as to be coaxial with the cylindrical portion 22. Has been done. The central axis 26 is the beam member 24.
It is firmly fixed by welding. Central axis 2
A connecting pin 26p is formed on both end faces of the shaft 6 so as to project coaxially with the central axis 26 thereof. The connecting pins 26p are attached to the bearing portion 4j formed on the fixed plate 4u of the seat frame 4 and the fixed plate 4u thereof. It is supported so as to be horizontally rotatable by a bearing portion 4j formed on the pressing plate 4p facing each other.

The cylindrical portion 22 of the hinge drum 20 is shown in FIG.
As shown in FIGS. 2A and 2A, etc., a substantially rectangular first opening 22 a is formed near the lower end K of the beam member 24. In addition, the second opening 2 having the substantially rectangular shape is also provided at a position rotated by about 80 ° to the left from the first opening 22a around the axis of the cylindrical portion 22.
2b is formed.

A lock cam 30 that engages with the first opening 22a or the second opening 22b formed in the hinge drum 20 is mounted on the fixed plate 4u of the seat frame 4. The lock cam 30 is a thick plate formed in a hook shape. As shown in FIG. 2B, the lock cam 30 includes a cam main body 32 and an engaging portion 34 formed in a hook shape at the tip of the cam main body 32. I have it. Further, the lock cam 30 is formed with operation pins 35 projecting to both sides in the thickness direction of the lock cam 30 at the boundary between the cam body 32 and the engaging portion 34.

A through hole 32k is formed at the base end of the cam body 32 of the lock cam 30, and the pin portion 38p of the support pin 38 formed on the fixing plate 4u of the seat frame 4 is inserted into the through hole 32k. To be done. Support pin 38
Is formed at a right angle to the fixed plate 4u, and is composed of a large-diameter support portion 38s and a pin portion 38p inserted into the through hole 32k of the lock cam 30. Further, a narrow groove (not shown) into which the E-ring 39e is fitted is formed at the tip position of the pin portion 38p.

When the pin portion 38p of the support pin 38 is inserted into the through hole 32k of the lock cam 30, as shown in FIG. 1A, a washer 39w is passed through the tip of the pin portion 38p, and the pin portion 38p is further inserted. The E-ring 39e is fitted into the narrow groove of. As a result, the lock cam 30 is attached to the support pin 38 in a vertically rotatable state. Support pin 38
A coil spring 39b is disposed around the coil spring 39b, and one end of the coil spring 39b is hooked on the operating pin 35 protruding to the back side (fixing plate 4u side) of the lock cam 30. Also,
The other end of the coil spring 39b is hooked on the first support column 7a located below and adjacent to the support pin 38.

Since the coil spring 39b is biased in the direction of separating the operation pin 35 of the lock cam 30 from the first support 7a, the lock cam 30 receives a force in the left rotation direction (upward rotation direction) in the figure by the coil spring 39b, Hinge drum 20
Is always pressed against the outer peripheral surface 22r of the. Therefore, when the hinge drum 20 rotates left (upward) or right (downward), the lock cam 30 moves.
Relatively moves along the outer peripheral surface 22r. Then, the engagement portion 34 of the lock cam 30 engages with the first opening 22a or the second opening 22b of the hinge drum 20, whereby the rotation of the manual handle 10 is restricted.

Further, the operation pin 35 of the lock cam 30 is operated to rotate the lock cam 30 rightward (downward) about the support pin 38 against the force of the coil spring 39b. Joint 34 and first opening 22
The engagement with a or the second opening 22b can be released. That is, the hinge drum 20 corresponds to the engaging member of the present invention, and the outer peripheral surface 22r of the hinge drum 20 corresponds to the sliding surface of the present invention. The lock cam 30 corresponds to the lock member of the present invention, and the coil spring 39b corresponds to the urging member of the present invention.

The first column 7 on which the coil spring 39b is hooked.
Reference numeral a is a column for connecting the fixing plate 4u of the seat frame 4 and the holding plate 4p, and the length dimension thereof is set to a value substantially equal to the axial dimension of the hinge drum 20. Further, a female screw 7w into which a bolt 8 is screwed in the axial direction is formed at the tip of the first support column 7a. A second strut 7b (which is located at a position slightly lower than the first strut 7a) is fixed to the fixing plate 4u of the seat frame 4 almost in parallel with the first strut 7a. Prop 7c
And the fourth strut 7d are fixed. The second columns 7b to 7d are columns for connecting the fixing plate 4u and the pressing plate 4p together with the first column 7a, and the length dimension thereof is set to a value equal to the dimension of the first column 7a. ing.

The third support column 7c and the fourth support column 7d have a function as a connecting member between the fixed plate 4u and the pressing plate 4p as described above, and also function as a rotation stopper of the manual handle 10. The third support column 7c is passed through the lower inner space of the hinge drum 20, and the fourth support column 7d is passed through the upper inner space of the hinge drum 20. And
The hinge drum 20 is provided between the third strut 7c and the fourth strut 7d.
The beam member 24 rotates according to the rotation of the hinge drum 20.

When the hinge drum 20 rotates to the left (the hand handle 10 rotates upward), the lock cam 30 relatively moves along the outer peripheral surface 22r of the hinge drum 20, and the grip 13 of the hand handle 10 is used. When reaching the position, as shown in FIG. 2 (A), the upper end portion H of the beam member 24 is reached.
Of the beam member 24 comes into contact with the side face of the fourth support column 7d, and the side face of the lower end K of the beam member 24 comes into contact with the third support column 7c. In this state,
The left rotation of the hand push handle 10 is stopped, and the beam member 24
The angle formed by the vertical line and the vertical line becomes α °, and the engaging portion 34 of the lock cam 30 causes the first opening 22 of the hinge drum 20 to move.
engage a.

As shown in FIG. 2B, the lock cam 30 has its first opening so that the front end surface 34f of the engaging portion 34 contacts the opening edge 22e of the first opening 22a and the side surface of the beam member 24. Since the lock handle 30 and the opening edge 22e of the first opening 22a are engaged with the handle 22a, the clockwise rotation (downward rotation) of the manual handle 10 is stopped. Therefore, the push handle 10 is locked in the use position. That is, the opening edge 22e of the first opening 22a of the hinge drum 20 corresponds to the first engaging portion of the engaging member of the present invention.

The engaging portion 34 of the lock cam 30 is the operating pin 3
5 is removed from the first opening 22a and the hinge drum 2
When 0 rotates to the right (hand push handle 10 rotates downward), the lock cam 30 similarly causes the outer peripheral surface 22r of the hinge drum 20 to rotate.
Move relatively along. And the hinge drum 20
Rotates about 80 ° to the right, and as shown in FIG. 4 (A), when the grip 13 of the hand push handle 10 reaches the non-use position, the side surface near the upper end H of the beam member 24 has the third support post 7c. The side surface contacts the side surface, and the side surface near the lower end K of the beam member 24 contacts the fourth support column 7d. As a result, the push handle 1
The downward rotation of 0 is stopped, and the engaging portion 34 of the lock cam 30 engages with the second opening 22b of the hinge drum 20.

As shown in FIG. 4B, the lock cam 30 engages with the second opening 22b so that the hook surface 34x of the engaging portion 34 hangs on the opening edge 22j of the second opening 22b. The lock cam 30 and the opening edge 22j of the second opening 22b stop the upward rotation of the manual handle 10. Therefore, the push handle 10 is locked in the unused position. That is, the opening edge 22j of the second opening 22b of the hinge drum 20 corresponds to the second engaging portion of the engaging member of the present invention. Further, the third column 7c, the fourth column 7d, and the beam member 24 of the hinge drum 20 correspond to the restricting means of the present invention.

The holding plate 4p of the seat frame 4 is shown in FIG.
As shown in (A), a bolt hole 8h through which the bolt 8 is inserted is formed at a position corresponding to the first strut 7a to the fourth strut 7d, and the bolt hole 8h is formed at a position corresponding to the operation pin 35 of the lock cam 30. An elongated hole 35h through which the operation pin 35 is passed is formed.

Next, an example of a procedure for assembling the hand push handle 10 to the seat frame 4 will be briefly described. First, with the coil spring 39b set on the support pin 38, the lock cam 3 is attached to the pin portion 38p of the support pin 38.
0 is rotatably attached. In this state, as described above, one end of the coil spring 39b is hooked on the operation pin 35 projecting to the back side of the lock cam 30, and the other end is connected to the first support column 7a.
Can be hung on. As a result, the lock cam 30 is constantly subjected to a force in the upward rotation direction (left rotation direction in the drawing) by the coil spring 39b.

Next, one connecting pin 26p formed on the hinge drum 20 of the hand push handle 10 is fitted into the bearing portion 4j of the fixing plate 4u of the seat frame 4,
Further, the other connecting pin 26p is used for the bearing portion 4 of the pressing plate 4p.
be fitted into j. Further, the operation pin 35 protruding to the front side of the lock cam 30 is passed through the elongated hole 35h of the pressing plate 4p,
Further, the bolt holes 8h of the holding plate 4p are aligned with the female screws 7w of the first support column 7a to the fourth support column 7d formed on the fixed plate 4u. In this state, the bolts 8 are attached to the female screws 7w of the first strut 7a to the fourth strut 7d through the bolt holes 8h of the holding plate 4p.
By being screwed, the hand push handle 10 is attached to the seat frame 4 through the hinge drum 20, the fixing plate 4u, the holding plate 4p and the like so as to be vertically rotatable. That is, the seat frame 4 corresponds to the wheelchair constituent member of the present invention.

Next, the operation of the push handle 10 will be described. As shown in FIG. 2A, when the hand push handle 10 is in the use position, as described above, the hinge drum 2
The side surface of the upper end portion H of the beam member 24 at 0 is the fourth pillar 7d.
Of the beam member 24 and the side surface of the lower end K of the beam member 24 abuts on the third support column 7c, and the leftward rotation (upward rotation) of the manual handle 10 is restricted. Therefore, even if a caregiver lifts the wheelchair 1 and applies a large pulling force to the grip 13 of the hand pushing handle 10, there is no inconvenience that the hand pushing handle 10 is rotated upward by the pulling force.

As shown in FIG. 2B, the tip end surface 34f of the engaging portion 34 of the lock cam 30 has an opening edge 22e of the first opening 22a of the hinge drum 20 and the beam member 2.
Since it is in contact with the side surface of No. 4, the downward rotation (right rotation) of the manual handle 10 is stopped by the action of the front end surface 34f of the lock cam 30 and the opening edge 22e of the first opening 22a of the hinge drum 20. Therefore, even if the caregiver applies a pushing-down force to the grip 13 of the hand-pushing handle 10, there is no inconvenience that the pushing-down force causes the hand-pushing handle 10 to rotate downward. That is, the push handle 10
Is locked in the use position, and the wheelchair seat 1 can be properly used as a wheelchair.

When the hand push handle 10 is moved to the unused position, the operating pin 35 is used to move the lock cam 30.
Is pushed down against the spring force of the coil spring 39b to release the engagement between the engaging portion 34 of the lock cam 30 and the first opening 22a of the hinge drum 20. In this state, the push handle 10 can be rotated downward. When the push handle 10 is rotated downward, as shown in FIGS. 3 (A) and 3 (B), the engaging portion 34 of the lock cam 30 has the coil spring 39b.
Is pressed against the outer peripheral surface 22r of the hinge drum 20 by the spring force of the
Move relatively along.

Then, the hand-pushing handle 10 is rotated downward about 80 ° from the use position, and as shown in FIGS. 4 (A) and 4 (B), the upper end portion H of the beam member 24 in the hinge drum 20.
The side surface in the vicinity abuts the side surface of the third support column 7c, and the beam member 24
When the side surface near the lower end portion K of the abutment abuts on the fourth strut 7d, the downward rotation of the manual handle 10 is stopped. Further, the engaging portion 34 of the lock cam 30 that relatively moves along the outer peripheral surface 22r of the hinge drum 20 automatically engages with the second opening 22b of the hinge drum 20 by the spring force of the coil spring 39b. As a result, the engaging portion 34 of the lock cam 30
The hook surface 34x in the above is hooked on the opening edge 22j of the second opening 22b, and the upward rotation of the manual handle 10 is restricted. That is, the hand-push handle 10 is locked in the unused position, and when the wheelchair seat 1 is used as a vehicle seat, the hand-push handle 10 may be unstable or swing due to the vibration of the vehicle. Absent.

When the hand push handle 10 is moved from the non-use position to the use position, the operation pin 35 pushes down the lock cam 30 against the spring force of the coil spring 39b, and the engaging portion 34 of the lock cam 30 and the hinge drum 20. The engagement with the second opening 22b is released. In this state, the hand push handle 10 can be turned upward, and when the hand push handle 10 is turned upward, as shown in FIG.
As shown in (B), the engagement portion 34 of the lock cam 30 relatively moves along the outer peripheral surface 22r of the hinge drum 20.

Then, the hand-pushing handle 10 is pivoted upward by about 80 ° from the non-use position, and as shown in FIGS. 2A and 2B, the side surface of the upper end portion H of the beam member 24 in the hinge drum 20. Comes into contact with the side surface of the fourth strut 7c and the side surface of the lower end K of the beam member 24 comes into contact with the third strut 7d, the upward rotation of the manual handle 10 is stopped. Further, the engaging portion 34 of the lock cam 30 that is relatively moving along the outer peripheral surface 22r of the hinge drum 20 is automatically engaged with the first opening 22a of the hinge drum 20 by the spring force of the coil spring 39b. The downward rotation of the push handle 10 is restricted.

As described above, according to the wheelchair seat 1 of this embodiment, when the hand push handle 10 is rotated to the unused position, the lock cam 30 and the first opening 22a of the hinge drum 20 form the hand push handle. Locked to a member. Therefore, even if the wheelchair is mounted on, for example, a vehicle, the hand push handle in the non-use position does not oscillate unstably due to the influence of vibration or the like.

Further, the hinge drum 20 has a structure which rotates in association with the rotation of the hand push handle 10, has an outer peripheral surface 22r on which the lock cam 30 slides, and the lock cam 30 is engaged with the outer peripheral surface 22r. First opening 22a that meets
And a second opening 22b are formed. Therefore, the structure of the hinge drum 20 can be simplified.

Further, since the restricting means (third strut 7c, fourth strut 7d) for restricting the vertical turning range of the hand-pushing handle 10 is provided, the hand-pushing handle 10 is moved in a direction beyond the turning range. Even if an operating force is applied, an unreasonable force is not applied to the hinge drum 20, the lock cam 30, and the like.

In the manual handle 10 according to the first embodiment, the lock cam 30 is formed in a hook shape. However, as shown in FIGS. 5A and 5B, the hook surface 44x of the lock cam 40 is formed. It may be formed with a gentle inclination. With this configuration, by pulling the hand-pushing handle 10 upward in the unused position with a force equal to or greater than the spring force of the coil spring 39b,
The opening edge 22j of the second opening 22b of the hinge drum 20 moves while pressing the hook surface 44x of the lock cam 40, and the engagement between the lock cam 40 and the hinge drum 20 is automatically released. Therefore, it is not necessary to push down the lock cam 40 with the operating pin 35 at the unused position.

In the first embodiment, the example in which the present invention is applied to the wheelchair seat 1 having both the function of the wheelchair and the function of the vehicle seat is shown, but the present invention is applied to a general wheelchair. Is also possible. Further, in the first embodiment, the manual handle 10 having a structure that rotates in the vertical direction with respect to the seat frame 4 has been described, but the present invention can also be applied to a manual handle that rotates in the horizontal direction. Further, in the first embodiment, an example in which the lock cam 30 is provided along the outer peripheral surface 22r of the cylindrical portion 22 of the hinge drum 20 is shown. However, instead of the cylindrical portion 22, a thick plate-shaped disc portion is formed and It is also possible to arrange the lock cam 30 along the surface.

[0042]

According to the present invention, even if a wheelchair is mounted on a vehicle, for example, the hand-held handle does not oscillate instable under the influence of vibration or the like, and the hand-held handle is located behind the wheelchair. Will not get in the way.

[Brief description of drawings]

FIG. 1 is an exploded perspective view (FIG. A) of a hand push handle portion of a wheelchair seat according to a first embodiment of the present invention, and an overall schematic perspective view (FIG. B) of a wheelchair seat.

FIG. 2 is a side view (FIG. A) showing a procedure for rotating a hand push handle from a use position to a non-use position, and a side view (FIG. B) showing an operation of a lock cam.

FIG. 3 is a side view (FIG. A) showing a procedure for rotating a hand push handle from a use position to a non-use position, and a side view (FIG. B) showing an operation of a lock cam.

FIG. 4 is a side view (FIG. A) showing a procedure for rotating a hand push handle from a use position to a non-use position, and a side view (FIG. B) showing an operation of a lock cam.

FIG. 5 is a side view (FIG. A) showing a modified example of the hand-pushing handle portion of the wheelchair seat, and a side view (B view) showing the operation of the lock cam.

FIG. 6 is a plan view (FIG. A) of a conventional push handle portion;
It is a horizontal sectional view (FIG. B) and an overall plan view of the wheelchair (FIG. C).

[Explanation of symbols]

1 Wheelchair seat 4 Seat frame (Wheelchair component) 4u fixed plate 4p presser plate 7c Third support (restriction means) 7d Fourth support (restriction means) 10 handwheel 20 Hinge drum (engagement member) 22r Outer peripheral surface (sliding surface) 22a First opening 22e Opening edge (first engaging portion) 22b Second opening 22j Opening edge (second engaging portion) 24 Beam members (restriction means) 30 Lock cam (lock member) 34 Engagement part 39b Coil spring (biasing member)

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 2001-70351 (JP, A) JP 10-43244 (JP, A) JP 11-113971 (JP, A) JP 2001-321403 ( JP, A) JP 2002-87278 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) A61G 5/00 B62B 11/00

Claims (5)

(57) [Claims] 1. A wheelchair having a structure in which a hand-push handle can be moved from a use position to a non-use position with respect to a wheelchair constituent member, the hand-push handle moving in conjunction with the movement of the hand-push handle, An engaging member having two engaging portions, which is connected to the wheelchair component, engages with the first engaging portion when the handwheel handle is in the use position,
The hand handle has a locking member that engages the second engagement portion when in the non-use position, wherein the engagement member is a structure that rotates in conjunction with movement of the hand wheel, It has a sliding surface on which the locking member slides, wheelchairs, characterized in that said first engagement portion and the second engagement portion is formed in a hole shape on the sliding surface thereof. 2. The wheelchair according to claim 1, wherein the engagement member is a cylinder fixed to a base end portion of the push handle.
-Shaped drum, the center axis of which is a hand-pushed hand
The lock member serves as a center of rotation of the handle, and the lock member is arranged to move forward when the hand push handle is rotated.
It is configured to be slidable relative to the outer peripheral surface of the recording drum.
A wheelchair characterized by that. 3. A wheelchair according to claim 1 or claim 2, a biasing member for biasing the locking member into the first engaging portion or the direction to engage the second engagement portion A wheelchair characterized by being equipped. 4. The wheelchair according to any one of claims 1 to 3, wherein the lock member is rotated from the non-use position to the use position by a force greater than a predetermined force of the hand handle. A wheelchair configured to be disengaged from the second engagement portion by being operated. 5. The wheelchair according to any one of claims 1 to 4, characterized in that it is provided with a regulation means for regulating the turning range of the hand-pushed handle.