JP2002301108A - Reclining type wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reclining type wheelchair which keeps knees of riding persons from being forced to bend or the positions of their head parts from deviating from the head rest position of the back rest member owing to failure in matching a step member with the lengths of limbs of the riding persons during the reclining. SOLUTION: There are arranged a reclining mechanism 23 which performs a reclining so as to increase the quantity of backward movement of a back rest member 3 for eliminating the deviation of the head part positions of riding persons from the back rest member and a pivoting mechanism 8 which raises the step member 2 to stretch the knees of riding persons while keeping the knees from bending.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reclining wheelchair.

[0002]

2. Description of the Related Art In recent years, barrier-free infrastructure in roads, transportation, public facilities, and the like has been improved, and easy-to-use wheelchairs and the like have been provided.
The range in which the elderly and the physically handicapped can freely work is rapidly expanding. However, increasing the range of activity means that the occupant stays in the wheelchair continuously for a long time, but if the occupant stays in the wheelchair for a long time, blood pressure may be impaired due to compression of the buttocks and thighs. was there. Therefore,
BACKGROUND ART Various wheelchairs have been proposed in which a step member of a wheelchair can be raised or a backrest member can be reclined so that a limb can be extended and an upper body can be sometimes laid down for a long time in a wheelchair. However, when the end of the step member or the backrest member is directly pivoted to the seat frame, the occupant's knee or waist joint is located above the pivot point of the step member or the backrest member when seated. When the step member is raised and leveled, the length of the step member is shorter than that of the limb, and the occupant must flex the knee. Therefore, in order to raise the pivot point of the step member to the position of the knee joint, a wheelchair has been proposed in which a frame for raising the pivot point is provided on the seat frame so as to have the same length as the limb. Since the frame for raising the pivot point is attached to the seat frame, there is a problem that when the occupant gets on and off the wheelchair, the frame interferes even if the armrest is raised or removed, making it difficult to get on and off smoothly. . Further, when the backrest member is reclined, the position of the headrest moves below the position of the occupant's head, so that the headrest must be removed or the position of the headrest must be changed.
In addition, there is a problem that such work cannot be performed by one person depending on the degree of disability, and the support of another person is required.

[0003]

SUMMARY OF THE INVENTION The present invention provides a reclining wheelchair in which the step member does not match the limb length of the occupant, the knee is bent, and the head position does not deviate from the headrest position of the backrest member during reclining. It is intended to provide.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a reclining mechanism for reclining a backrest member so as not to be displaced from the head position of an occupant, and a step member for bending a knee of the occupant. A reclining wheelchair provided with a pivot mechanism for raising the reclining wheelchair is provided in the invention of claim 1, wherein the reclining mechanism and the pivot mechanism are operated by an electric operation control mechanism. According to the second aspect of the present invention, in the first or second aspect, the reclining mechanism includes:
A substantially L-shaped plate for pivotally connecting the seat frame and the backrest member;
A substantially triangular tilt plate in which the top is fixed to the backrest member at a position coaxial with the substantially L-shaped plate, one of the lower portions is slidably engaged with the guide groove of the seat frame, and the other of the lower portion is linked to the operation control mechanism. And the pivot mechanism is
A pivot rod of a step member pivotally attached to the seat frame, a guide rod with a step which is telescopically inserted into the pivot rod, and a tip end pivotally attached to the guide rod and the other end of the operation control mechanism A reclining wheelchair comprising an extruded rod connected to a wheel is defined as the invention of claim 3 and claims 1 to 3.
In the invention of claim 4, the reclining type wheelchair in which the reclining mechanism and the pivoting mechanism are interlocked via the interlocking mechanism is the invention of claim 4, wherein the interlocking mechanism connects the pushing rod and the tilting plate. A reclining wheelchair comprising a reverse L-shaped link and a linking rod provided with a link connecting the tilting plate and the reverse L-shaped link to an operation control mechanism is the invention of claim 5.

[0005]

Next, a preferred embodiment of the present invention will be described in detail with reference to the drawings. Reference numeral 1 denotes a square frame-shaped frame main body. The frame main body 1 includes a seat frame 1a on which a foldable seat is stretched, a leg frame 1b,
And a lower frame 1c. And the frame body 1
A pair of left and right step members 2 and a backrest member 3 on which a foldable backrest sheet is stretched are attached, and left and right armrests 4 are pivotally mounted so as to be able to pivot up and down so as to open the sides. . The backrest member 3 is attached to the frame body 1 via a reclining mechanism 23 described later. The casters 5 are attached to the leg frame 1b. Reference numeral 6 denotes a main wheel driven by an electric motor 7, and the main wheel 6 is a lower frame 1c.
It is attached via an electric motor 7 to a base plate 6a which is detachably provided on the base plate 6a.

The step member 2 is simultaneously pivoted up and down and expanded and contracted via a pivoting mechanism 8. When the step member 2 is raised, the step member 2 is displaced from the limb length of the occupant to prevent the knee from being bent. The member 2 is extended. The pivot mechanism 8 is operated by an electric operation control mechanism 9. The pivot mechanism 8 of the step member 2 will be described more specifically. The pivot mechanism 8 includes a pair of left and right pivot members 10 of the step member 2 pivotally attached to the tip of the seat frame 1a, and the respective pivot members. 1
A guide rod 11 with a step of the step member 2 which is fitted to be able to expand and contract into a zero, and a pair of right and left push rods 12 each of which has a tip pivotally connected to each of the guide rods 11 and the other end of which is connected to the operation control mechanism 9. It becomes. The connection between the pushing rod 12 and the operation control mechanism 9 is performed via a pair of left and right inverted L-shaped links 13 as an interlocking mechanism 32, an interlocking rod 15, and a link 16 of the interlocking rod 15, which will be described later. Each of the inverted L-shaped links 13 has one end pivotally connected to the base end of the push rod 12 and the other end slidably engaged with a guide groove 14 of the seat frame 1a with a pin. It is a concatenation. The interlocking rod 15 is provided with a link 16 for pivotally connecting the driving rod 9 a of the electric operation control mechanism 9. 14a is the guide groove 1
4 is a needle bearing attached to a pin engaged with the needle bearing 4.

An angle setting mechanism 17 stops the interlocking of the step member 2 and the backrest member 3 to change the stop angle of the step member 2, and the angle setting mechanism 17 includes the step member 2 and the backrest member 3. Are stopped by the same interlocking mechanism 32, the interlocking motion of both is stopped, only the return operation of the backrest mechanism 3 is continued, and the return operation of the step member 2 is stopped halfway, thereby returning the step member 2 The position (stop angle) is adjusted. The specific structure of the angle setting mechanism 17 is the push rod 1 having a double pipe structure.
2 outer cylinder 12a and the outer cylinder 1 pivotally attached to the leg frame 1b.
Guide cylinder 18 for slidingly guiding 2a, and outer cylinder 12
a stopper 19 fixed to the inner cylinder 12a so as to be adjustable in position, an inner cylinder 12b whose base end is pivotally connected to the inverted L-shaped link 13 and slidably fitted into the outer cylinder 12a, and an outer cylinder 12a and the inverted L-shaped link 13 And a tension spring 20 provided therebetween. When the outer cylinder 12a is retracted, the stopper 19 contacts the guide cylinder 18 to stop the outer cylinder 12a from retreating. The pulling spring 20 constantly urges the outer cylinder 12a and the inner cylinder 12b in the shortening direction, and the spring force can be adjusted by locking one end to a stopper 20a fixed to the outer cylinder 12a so as to be adjustable. And Reference numeral 21 denotes a step mounting rod provided in parallel with the guide rod 11, and reference numeral 22 denotes a step which is removably mounted on the step mounting rod 21.
22a is a tension spring provided on the step member 2,
The pulling spring 22a is locked at the lower end of the guide rod 11 and the upper end of the pivoting rod 10, and constantly biases the guide rod 11 in the shortening direction.

The backrest member 3 is reclined by the reclining mechanism 23.
The reclining is performed so that the backrest member 3 largely moves rearward so as not to shift from the head position of the occupant. The reclining mechanism 23 is operated by the electric operation control mechanism 9. The specific structure of the reclining mechanism 23 of the backrest member 3 is the seat frame 1
a pair of left and right substantially L-shaped plates 24, one end of which is pivotally connected to the backrest member 3 at the other end, and a top fixed to the backrest member 3 coaxially with the L-shaped plate 24; Is slidably engaged with the guide groove 14 of the seat frame 1a with a pin, and the other of the lower part is a pair of right and left substantially triangular tilt plates 25 linked to the operation control mechanism 9.
It consists of: The other lower portion of the tilting plate 25 is opposite to the interlocking rod 15 as
The driving rod 9a of the electric operation control mechanism 9 is connected to the
It is supposed to be linked to. As the pivot point between the substantially L-shaped plate 24 and the backrest member 3 is positioned higher than the seat surface, the amount of movement of the backrest member 3 rearward increases.

Reference numeral 26 denotes a controller for controlling the forward / backward movement of the wheelchair, the vertical pivoting and expansion / contraction of the step member 2, and the reclining of the backrest member 3, and 27 denotes an auxiliary wheel attached to the base plate 6a.
Is for preventing the wheelchair from falling backward when the backrest member 3 is horizontally lowered. Reference numeral 28 denotes a shock absorber provided between the horizontal rod 27a to which the auxiliary wheels 27 are attached and the lower frame 1b. The shock absorber 28 is for preventing the lift operation of the caster 5 of the wheelchair. 29 is a boss provided on the inverted L-shaped link 13 for attaching the other end of the extension spring 20 and the inner cylinder 12b of the push rod 12, 30 is an attachment portion for attaching the base of the operation control mechanism 9 to be pivotable, and 31 is an attachment portion. The pivotal shaft 32 of the armrest 4 is an interlocking mechanism of the reclining mechanism 23 and the pivoting mechanism 8. The interlocking mechanism 32 includes an inverted L-shaped link 13 that connects the pushing rod 12 and the tilting plate 25, and a tilting plate. An interlocking rod 15 provided with a link 16 for connecting the reverse L-shaped link 13 to the operation control mechanism 9
It consists of:

In the vehicle constructed as above, the occupant sits on a seat stretched on the seat frame 1a of the frame body 1, operates the knob of the controller 26 to move forward and backward, and moves to the destination. Is the same as before, but if the driver sits in a wheelchair for a long time and feels that the buttocks and thighs may be compressed and blood circulation may be impaired, the occupant turns on the operation switch of the controller 26 to control the operation. The drive rod 9a of the mechanism 9 is retracted from the state shown in FIG.

As the driving rod 9a of the operation control mechanism 9 retreats, the interlocking rod 15 of the interlocking mechanism 32 to which the link 16 pivotally attached to the driving rod 9a moves forward in FIG. The tilting plate 25 of the reclining mechanism 23 pivotally attached to the interlocking rod 15 by this forward movement.
And the inverted L-shaped link 13 of the interlocking mechanism 32
As a result, the lower part of the tilting plate 25 locked in the guide groove 14 moves forward, whereby the top of the tilting plate 25 tilts rearward. Therefore, the backrest member 3 fixed to the top of the tilt plate 25
Is tilted backward about the pivot point of the substantially L-shaped plate 24 on the seat frame 1a side. When the backrest member 3 is reclined, the substantially L-shaped plate 24
The arc drawn by the backrest member-side pivot point is larger than the case where the base end of the backrest member 3 is directly provided on the seat frame 1a at the pivot point, so that the arc attached to the backrest member 3 is not shown. The headrest position not to be moved rearward with reclining, so that the head position of the occupant does not deviate from the headrest position.

The operation of the operation control mechanism 9 is controlled by the interlocking mechanism 3.
2, not only the reclining mechanism 23 but also the pivoting mechanism 8
Is also operated, so that the pushing rod 12 is simultaneously moved forward (to the left in FIG. 1) by the pivot mechanism 8. The push rod 12 that moves forward under the guidance of the guide cylinder 18
As a result, the guide rod 1 pivotally attached to the tip of the seat frame 1a
1 stands up from a substantially vertical state to a horizontal state. At this time, since the pivoting rod 10 is pivotally attached to the seat frame 1a, the guide rod 11 inserted into the pivoting rod 10 slides and extends as the pushing rod 12 advances. For this reason, the limb of the occupant hanging on the step 22 is extended horizontally without being bent. In this way, the step member 2 and the backrest member 3 are reclined in conjunction with each other, so that the occupant's whole body can be laid down at the same time, and pressure on the buttocks, thighs, etc. is reduced, so that blood circulation is reduced. Obstacles can be eliminated. When the backrest member 3 and the step member 3 thus reclined are returned to their original positions, a switch for performing the reverse operation of the controller 26 is pressed to cause the operation control mechanism 9 to operate in the reverse direction, whereby the pivot mechanism The reclining mechanism 8 and the reclining mechanism 23 perform the operation opposite to the above through the interlocking mechanism 32 to return to the old state.

When the step member 2 is returned from the horizontal state to the vertical state, the stopper 1 of the angle adjusting mechanism 17 is used.
9 is moved to an appropriate position of the pushing rod 12 projecting forward from the guide cylinder 18, and the stopper 19 is fixed by tightening the tightening bolt 19a. Since the stopper 19 that has been stopped is brought into contact with the guide cylinder 18, the step member 2 has an inclination at the stopped position. By changing the angle of the step member 2 in this manner, the occupant can easily obtain the most comfortable posture.

In the preferred embodiment, the reclining mechanism 2 for reclining the backrest member 3 is provided.
3 and a pivot mechanism 8 for raising the step member 2
2, but the operation control mechanism 9
May be provided and operated at different operation timings, and the backrest member 3 and the step member 2 may be moved separately. Although the operation control mechanism 9 is operated by electric power, the reclining mechanism 23 for operating the backrest member 3 and the pivoting mechanism 8 for operating the step member 2 are biased by a spring, and are manually operated. Of course, it may be operated.

FIG. 6 shows another pivoting mechanism 8 for pivoting the step member 2 by a manual operation control mechanism 9. Only the configuration different from the pivoting mechanism 8 of the preferred embodiment is described. Explanation will be given, and the same components will be denoted by the same reference numerals and description thereof will be omitted. The step member 2 is pivoted horizontally by manually raising it, and after the pivoting, the horizontal state is maintained by the operation control mechanism 9 and the link mechanism 35. One end of the link mechanism 35 is pivotally attached to the seat frame 1a. A first link 35a, a second link 35b having one end pivotally connected to the other end of the first link 35a,
And a third link 35c having one end pivotally connected to the other end of the link 35b and the other end pivotally connected to the guide rod 11. A substantially middle portion of the second link 35b is pivotally attached to a bracket 36 protruding from the pivot rod 10.
Further, the operation control mechanism 9 pivotally attaches the base to a bracket suspended from the seat frame 1a, and pivots the tip of a slidably fixable rod 9a to an intermediate portion of a girder stretched between the left and right guide rods 11. Rod 9a
Can be locked at any position.

[0016]

As is apparent from the above description, the present invention provides a reclining mechanism for reclining the backrest member so as not to be displaced from the occupant's head position, and raising the step member so that the occupant's knee is not bent. By providing the pivot mechanism, the occupant can extend the limb without bending the knee, and can lie down on the upper body without shifting the occupant's head position and headrest position. Also,
Since the step member can be lengthened to the length of the occupant's limb extended by the pivot mechanism, the frame for raising the pivot point which was required in the past becomes unnecessary, and the side of the wheelchair is obstructed by the frame. Therefore, getting on and off can be performed very easily. In addition, the reclining mechanism and the pivoting mechanism are operated by the electric operation control mechanism as described in claim 2, so that even if there is a severe obstacle, the limb can be freely moved without the help of another person. You can stretch or lie on your upper body. The reclining mechanism includes: a substantially L-shaped plate pivotally connecting the seat frame and the backrest member; a top portion fixed to the backrest member at a position coaxial with the substantially L-shaped plate; A substantially triangular tilt plate which is slidably engaged with the guide groove and the other of which is linked to the operation control mechanism, wherein the pivot mechanism comprises a pivot rod of a step member pivotally attached to the seat frame; A guide rod with a step that is telescopically inserted into the pivot rod, and a push rod having a distal end pivotally connected to the guide rod and the other end connected to the operation control mechanism, A highly reliable mechanism with an extremely simple structure can be provided at low cost. According to the fourth aspect of the present invention, the reclining mechanism and the pivoting mechanism are interlocked via the interlocking mechanism, so that the occupant can easily and simultaneously lie down on the whole body. As described in claim 5, the interlocking mechanism includes an inverted L-shaped link connecting the pushing rod and the tilting plate, and an interlocking rod provided with a link connecting the tilting plate and the inverted L-shaped link to the operation control mechanism. Thus, there are various advantages such as the two can be interlocked with an extremely simple structure. Therefore, the present invention greatly contributes to the development of the industry as a reclining wheelchair which has solved the conventional problems.

[Brief description of the drawings]

FIG. 1 is a side view showing a preferred embodiment of the present invention.

FIG. 2 is a partially cutaway side view showing a main part of a reclining mechanism used in a preferred embodiment of the present invention.

FIG. 3 is a partially cutaway rear view showing a main part of a pivot mechanism used in a preferred embodiment of the present invention.

FIG. 4 is a partially cutaway rear view showing a main part of a pivot mechanism used in a preferred embodiment of the present invention.

FIG. 5 is a side view showing a reclining state according to a preferred embodiment of the present invention.

FIG. 6 is a partially cutaway side view showing a main part of a manual pivoting mechanism used in a preferred embodiment of the present invention.

[Explanation of symbols]

 1a seat frame 2 step member 3 backrest member 8 pivot mechanism 9 operation control mechanism 10 pivot rod 11 guide rod 12 push rod 23 reclining mechanism 24 substantially L-shaped plate 25 tilt plate

Claims (5)

[Claims] A reclining mechanism for reclining the backrest member so as not to be displaced from the head position of the occupant, and a pivoting mechanism for raising the step member so that the occupant's knee is not bent are provided. Reclining wheelchair. 2. The reclining wheelchair according to claim 1, wherein the reclining mechanism and the pivot mechanism are operated by an electric operation control mechanism. 3. A reclining mechanism comprising: a substantially L-shaped plate for pivotally connecting a seat frame and a backrest member; a top portion fixed to the backrest member at a position coaxial with the substantially L-shaped plate; A substantially triangular tilt plate is slidably engaged with the groove and the other of the lower portion is connected to the operation control mechanism. The pivot mechanism includes a pivot rod of a step member pivotally attached to the seat frame; 3. The guide rod according to claim 1, further comprising a stepped guide rod that is telescopically inserted into the movable rod, and a push rod having a distal end pivotally connected to the guide rod and the other end connected to the operation control mechanism. 4. Reclining wheelchair. 4. The reclining wheelchair according to claim 1, wherein the reclining mechanism and the pivot mechanism are interlocked via an interlocking mechanism. 5. An interlocking mechanism comprising an inverted L-shaped link connecting the pushing rod and the tilting plate, and an interlocking rod provided with a link connecting the tilting plate and the inverted L-shaped link to an operation control mechanism. Item 5. A reclining wheelchair according to item 4.