JP4633453B2 - Relaxed wheelchair with electric stand-up assist function - Google Patents

Description

  The present invention relates to a footrest attached to the front part of a wheelchair, and an electric stand-up assisting machine capable of changing the angle by interlocking a seat part and a backrest part with an upper part of a front caster capable of rotating with a main wheel. The present invention also relates to a relaxing wheelchair with an electric start-up assisting function equipped with the electric start-up auxiliary machine.

  Generally, the footrest attached to the front part of the wheelchair is provided for a seated person of the wheelchair to sit on the foot stably. When getting on and off the wheelchair, the assistant opens the footrest attached to the front part of the wheelchair on both sides, and the seater gets on and off the wheelchair from between the footrests opened on both sides. Various ideas have been made for such a footrest. For example, in Patent Document 1, a base end portion of a footrest arm having a footrest portion attached forward to a distal end portion is pivotally attached to a front end portion of a seating portion, and the footrest arm is driven to advance and retract the power cylinder. In the footrest of an electric wheelchair that can be rotated from the normal position facing downward by the cylinder rod to the horizontal position along the seating part, the footrest arm is a slide arm with the footrest part facing forward at the tip And a guide arm that pivotally attaches to the front end portion of the seating portion and guides the slide arm in a slidable manner. One end of the cylinder rod is pivotally attached to the slide arm. The other end of the link arm and the guide arm are pivotally mounted so that the cylinder rod moves forward. There is disclosed a footrest for an electric wheelchair characterized in that when the guide arm is moved, the slide arm is driven forward via the link arm as the guide arm is rotated to a horizontal position. .

  Further, in Patent Document 2, a base end portion of a footrest arm having a footrest portion attached to the front end portion is pivotally attached to a front end portion of a seating portion, and the footrest arm is driven to advance and retract the power cylinder. In the footrest of an electric wheelchair that can be rotated from the normal position facing downward by the cylinder rod to the horizontal position along the seating part, the footrest arm is a slide arm with the footrest part facing forward at the tip And a guide arm that is pivotally attached to the front end portion of the seating portion and slidably guides the slide arm, a rack gear is provided on the slide arm in the vertical direction, and the tip end of the cylinder rod is The bracket is pivotally attached to a bracket protruding from the guide arm, meshed with the rack gear, and pivotally attached to the bracket. When an extrusion gear having a radius centered on a line is fixed to the tip of the cylinder rod and the cylinder rod is driven forward, the slide arm is pushed out as the guide arm rotates to a horizontal position. A footrest of an electric wheelchair characterized by being driven forward by a gear is disclosed.

  In Patent Documents 1 and 2, in an electric wheelchair, the footrest is driven as the wheelchair is driven. On the other hand, in Patent Document 3, a pair of large wheels and casters are disposed on the left and right body frames, a seat and a backrest are disposed between the left and right body frames, and a footrest is disposed at a lower front portion of the seat. In a wheelchair with an electric footrest in which the footrest is lifted and lowered by an electric lifting device, a screw shaft is arranged in the vertical direction at a substantially central portion in the left-right direction at the front lower end portion of the seat, and the screw shaft is a motor. The nut that is rotated by the screw shaft and screwed into the screw shaft is connected to the rear position via the footrest arm at the approximate center in the left-right direction of one footrest, and the area of the upper surface of the footrest moves both feet left and right by a predetermined distance A wheelchair with an electric footrest characterized by having a size that can be used is disclosed. Furthermore, in Patent Document 4, a footrest is coupled to the lower end of the footrest arm, and the screw shaft is supported in a state in which the screw shaft is rotatable and cannot be moved up and down in an electric footrest for a wheelchair in which the footrest is lifted and lowered by an electric lifting device. The footrest guide shaft is arranged in parallel with the screw shaft, the footrest arm can be moved up and down by the footrest guide shaft and guided in parallel with the footrest guide shaft, and the upper part of the footrest arm is connected to the nut. An electric footrest for a wheelchair is disclosed, characterized in that the lower end of a footrest arm is connected to the rear position of one footrest, and the area of the upper surface of the footrest is sized so that both feet can move left and right by a predetermined distance Yes.

However, the electric footrest of the above-mentioned patent document is devised to make the position for placing a foot comfortable, and is not intended to be in the way of getting in and out of a wheelchair. Furthermore, there is no wheelchair in which the seating surface angle and the back angle of the wheelchair can be changed in conjunction with each other and can be easily tilted or reclined. For this reason, the advent of a wheelchair that can easily get on and off the wheelchair and can be easily tilted or reclined is desired.
Japanese Patent Laid-Open No. 2003-116929 JP 2003-220098 A JP 2003-199796 A JP 2003-260087 A

  The present invention relates to an electric stand-up assisting device for a wheelchair that is easy for a wheelchair user to get on and off the wheelchair and easily tilting or reclining, and the electric motor for the wheelchair. It provides a relaxed wheelchair with a stand-up assist function.

  As a result of intensive studies to solve the above problems, the seat and footrest are linked by a slide plate, so that when a wheelchair user gets on and off from the front, it is easy to get on and off the wheelchair. We have succeeded in creating an electric footrest that can put a foot on the mind and a wheelchair equipped with the electric footrest.

According to the first aspect of the present invention, the slide plate 11 fixed to the rear body frame 18 of the wheelchair, the back seat frame 19 for raising and lowering the seat on the slide portion 11 (a) of the slide plate 11 , and the footrest 20 are provided. A slide arm 15 that moves up and down and a cylinder rod 13 that extends from the drive unit 12 are slidably mounted by bolts (11b) and nuts (11c), and the drive unit 12 that expands and contracts the cylinder rod 13 is a wheelchair. The front body frame 17 attached to the lower part of the wheelchair is pivotally mounted with a bolt (12a) and a nut (12b) so that it can be pivoted, and the angle of the seating surface of the seat 29 of the wheelchair is changed. wheelchairs for the variation of the backrest angle by movement, vertical movement of the footrest 20 is attached to the front of the wheelchair, characterized in that the movable conjunction with With motorized rise auxiliary function, which is the wheelchair. A back seat frame that moves the seat up and down and a cylinder rod that pushes back and forth the slide arm that moves the footrest up and down are slidably mounted on the slide part of the slide plate with bolts and nuts. In this way, by linking the back seat frame that moves the seat up and down and the footrest at the slide part of the slide plate, the seating surface angle of the footrest and the seating part and the backrest angle of the backrest are linked, making it easy to tilt and recline. Can be.

The wheelchair according to the present invention is characterized in that the electric stand-up assisting device for a wheelchair according to claim 1 is mounted on a wheelchair in which a seat portion and a backrest portion are mounted on an upper portion of a main wheel and a rotatable front caster. It is a relaxing wheelchair with an electric stand-up assist function. By mounting the electric stand-up assisting device according to claim 1, it is possible to easily tilt and recline, and when the footrest is lowered, the rear part of the seat is lifted. When the rear part of the unit is lifted, the seat is in a state of receiving a waist and can get on and off the wheelchair with a natural posture.

The wheelchair according to the present invention is a relaxed wheelchair with an electric standing assistance function, wherein a rotatable rear caster is attached to the rear part of the main wheel of the relaxing wheelchair with an electric standing assistance function. By attaching the rear caster to the rear part of the main wheel, even if tilting or reclining, there is no fear of falling to the rear part, and the wheelchair can be tilted or reclining in a stable state.

  The electric stand-up assisting machine of the present invention uses a slide plate to interlock the footrest, seat, and backrest, so the footrest, seat surface angle, and backrest angle can be interlocked with a single switch. Can be used as a tilting or reclining wheelchair.

  The electric stand-up assisting machine, which is characterized by the fact that the seat and the footrest are operated in conjunction with the slide plate, and the wheelchair equipped with the electric stand-up assisting machine, because the seat and the footrest are linked by the slide plate. When the footrest is at the lowest end, the seat can be lifted from the wheelchair and lifted so that it can be easily lifted. .

  Since the footrest is lowered to the same position as the ground contact surface of the main wheel, the occupant can leave the footrest on the footrest without opening the footrest on both sides and lowering the occupant's foot from the footrest as before. You can get on and off.

  By attaching the rear caster to the rear part of the main wheel, the footrest can be lifted to change the seating angle and the backrest angle, so that it is stable and can be relaxed as a tilting or reclining wheelchair.

  Hereinafter, the electric stand-up assisting device of the present invention and the wheelchair equipped with the electric stand-up assisting device will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments.

  FIG. 1 shows the structure of an electric stand-up assisting device 100 for a wheelchair according to the present invention. The electric stand-up assisting device 100 for a wheelchair according to the present invention includes a slide plate 11 that is fixed to a rear body frame 18, a back seat frame 19 that raises and lowers a seat on the slide portion 11 (a) of the slide plate 11, and a footrest 20. A slide arm 15 that moves up and down, the back seat frame 19, and a cylinder rod 13 that extends from a drive unit 12 that raises and lowers the slide arm 15 are slidably mounted by bolts (11b) and nuts (11c). . The drive part 12 for extending and contracting the cylinder rod 13 is pivotally attached to a front body frame 17 attached to the lower part of the wheelchair so as to be rotatable by bolts (12a) and nuts (12b).

  FIG. 2 shows a coupled state of the slide portion 11 (a) of the slide plate 11 of the electric stand-up assisting device 100, the cylinder rod 13 of the drive portion 12, the back seat frame 19, and the slide arm 15. A back seat frame 19 that raises and lowers the seat 29 and a slide arm 15 that raises and lowers the footrest 20 are interposed via a cylinder rod 13 that extends from the drive unit 12 that pushes the slide 11 (a) of the slide plate 11 up and down. The bolt 11 (b) and the nut 11 (c) are slidably mounted on the shaft. 2A is a fulcrum for tilting, and FIG. 2B is a fulcrum for reclining.

  FIG. 3 shows a coupled state of the drive unit 12, the slide plate 11, and the back seat frame 19 via the cylinder rod 13. When the drive unit 12 is switched on, the cylinder rod 13 expands and contracts, and the bolt 11 (b) pivotally attached to the cylinder rod 13 moves up and down between the slide units 11 (a) of the slide plate 11. To do. The back seat frame 19 moves up and down by the vertical movement of the slide part 11 (a) of the bolt 11 (b), and the rear part of the seat 29 moves up and down by the tilting fulcrum (A) and the reclining fulcrum (B). Then the seat angle changes. Further, the backrest frame 26 moves back and forth to change the backrest angle, and tilting and reclining can be performed. Examples of the drive unit 12 of the electric start-up auxiliary machine 100 of the present invention include an actuator that can push the cylinder rod 13 or a gas damper.

FIG. 4 shows a method of transmitting the power from the drive unit 12 to the footrest 20 through the slide arm 15. The power from the drive unit 12 is converted from the longitudinal movement of the cylinder rod to the vertical movement by the slide part 11 (a) of the slide plate 11 from the cylinder rod 13, and further the vertical movement of the slide part 11 (a) of the slide plate 11 As a result of the back and forth movement of the slide arm 15, the footrest 20 can be moved up and down on the front of the wheelchair by pushing or pulling the footrest frame 21. The link arm 16 supports the footrest 20 together with the footrest frame 21. (C) in FIG. 4 is the footrest frame 21.
It is a fulcrum when rotating the back and forth. Because the seat and footrest are linked without using gears, etc., using a slide plate, the weight of the electric lift assist device is light, and even if it is mounted on a wheelchair, there is little change in the total weight, making it easy to handle. .

  FIG. 5 shows a relaxing wheelchair 200 with an electric start assisting function equipped with the electric start assisting device of the present invention. A seat back 29 is mounted on the seat 29 and the back frame 26 on the seat seat frame 14 mounted on the main wheel 23 and the rotatable front caster 24, and a headrest 27 is mounted on the back 28. The electric stand-up assisting device of the present invention was attached to a wheelchair in which the grip portion 22 was attached to the rear portion of the backrest 28. The slide plate 11 interlocks the change in the angle of the seating surface of the seat 29 of the wheelchair, the change in the angle of the backrest due to the back and forth movement of the backrest frame 26, and the vertical movement of the footrest 20 attached to the front part of the wheelchair. Move. The switch 30 for operating the drive unit is attached to a position near the armrest 25 where it can be easily operated. A rear caster 31 that holds the wheelchair stably is attached to the rear of the main wheel 23. By attaching the rear caster 31, the wheelchair can be tilted or reclined for use with peace of mind.

  FIG. 6 shows a relaxed wheelchair 200 with an electric stand-up assist function in which the electric stand-up assisting device of the present invention is mounted on a wheelchair. The drive unit 12 (actuator or gas damper) is attached to a main body frame 17 attached to the lower part of the wheelchair. The cylinder rod 13 is slidably attached to the slide portion (11a) by a bolt (11b) and a nut (11c). FIG. 6 shows a normal use state of the wheelchair. In a normal use state, the position of the bolt (11b) to which the cylinder rod 13 is connected is substantially at the center of the slide portion (11a), the footrest 20 is positioned higher than the ground contact surface of the main wheel 23, and the seat portion 29 The seating surface is kept substantially parallel to the 23 grounding surface of the main wheel.

  FIG. 7 shows a state in which the relaxing wheelchair 200 with the electric stand-up assist function equipped with the electric stand-up assist device is reclining. As shown in FIG. 7, when the wheelchair is in the reclining state, the bolt 11 (b) of the slide portion (11 a) of the slide plate 11 is positioned at the lowest level. When the bolt 11 (b) comes to the lowest stage, the slide arm 15 is pushed forward, and the footrest 20 is lifted. Moreover, the back seat frame 19 is pulled down, the seat 29 is lowered around the fulcrum A, the rear of the seat 29 is lowered, the front is raised, and the wheelchair can be in a reclining state. The rear caster 31 attached to the rear portion of the main wheel 23 stably holds the wheelchair when the wheelchair is in a reclining state.

  FIG. 8 shows a state where the footrest 20 of the wheelchair is lowered to the same position as the ground contact surface of the main wheel 23. As shown in FIG. 8, when the bolt (11b) is positioned above the slide portion (11a) of the slide plate 11, the slide arm 15 is pulled backward and the footrest 20 is pushed down. Further, the back seat frame 19 is pushed up so that the seat portion 29 is lowered forward with the fulcrum A as the center, the rear portion of the seat portion 29 is raised and the waist is lifted, so that the posture of getting on and off the wheelchair is taken naturally. It becomes easy to get on and off the wheelchair.

FIG. 1 is a top view of a coupled state of a drive unit and a slide plate of an electric start-up auxiliary machine. FIG. 2 is a perspective view showing a state in which the slide plates of the electric start-up auxiliary machine are coupled. FIG. 3 is a side view of a coupled state of the drive unit, the slide plate, and the backrest frame of the electric stand-up assisting device. FIG. 4 is a side view showing the relationship between the footrest and the frame of the electric stand-up assisting machine. FIG. 5 is a perspective view of a relax wheelchair with an electric start assisting function equipped with an electric start assisting device. FIG. 6 is a side view of a relaxed wheelchair with an electric stand-up assist function equipped with an electric stand-up assist device in a normal use state. FIG. 7 is a side view showing a reclining use state of a relaxing wheelchair with an electric stand-up assist function equipped with an electric stand-up assist device. FIG. 8 is a side view showing a state where the footrest of the relax wheelchair equipped with the electric stand-up assist function equipped with the electric stand-up assist function is lowered to the lowermost end.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100: Electric stand-up auxiliary machine 200: Relaxing wheelchair with the electric stand-up auxiliary function equipped with the electric stand-up auxiliary machine 11: Slide plate 12: Drive part 13: Cylinder rod 14: Seat seat frame 15: Slide arm 16: Link arm 17: Front body frame 18: Rear body frame 19: Back seat frame 20: Footrest 21: Footrest frame 22: Grasping part 23: Main wheel 24: Front caster 25: Armrest 26: Backrest frame 27: Headrest 28: Back 29: Seat 30: Switch 31: Rear caster

Claims (2)

The slide plate 11 fixed to the rear body frame 18 of the wheelchair, the back seat frame 19 for moving the seat up and down on the slide portion 11 (a) of the slide plate 11 , the slide arm 15 for moving the footrest 20 up and down, and the drive unit A cylinder rod 13 extending from 12 is slidably mounted by a bolt (11b) and a nut (11c), and the drive unit 12 for extending and contracting the cylinder rod 13 is mounted at the lower part of the wheelchair. The main body frame 17 is pivotally mounted with a bolt (12a) and a nut (12b) so as to be pivotable. The fluctuation of the angle of the seating surface of the seat 29 of the wheelchair, vertical movement of the footrest 20 is attached to the front of the wheelchair, conjunction with wheelchair electric rising auxiliary machine, characterized in that the movable Wheelchair attached.   A relaxed wheelchair with an electric standing assistance function, wherein a rear caster capable of rotating is mounted on the rear part of the main wheel of the relaxing wheelchair with the electric standing assistance function according to claim 1.

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