JP2007082991A - Reclining mechanism for wheel chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the stability of a wheel chair in lifting up its seat by moving its rear wheels in connection with its reclining mechanism. <P>SOLUTION: This reclining mechanism for a wheel chair comprises: a tilting section 3 whose turning force is transmitted to a synchronous pulley when a backrest 8 is tilted, and then conveyed to a relay section 2 via a timing belt; the relay section 2 which transmits the turning force from the tilting section 3 to a transmission section 1 through a timing belt 13 stretched between a synchronous pulley 23 and a synchronous pulley 12; the transmission section 1 in which a toothed plate 11 is turned while being engaged with a toothed wheel 41 and a synchronous pulley 42, in association with the transmission force of the timing belt 13 with the movement to turn a folding arm 5 about a shaft 14; and an open leg section 4 consisting of the folding arm 5 and another arm 6 which move and open about the axis of a toothed wheel 61 when the turning force from the synchronous pulley 42 is transmitted to a gear wheel 51 via the synchronous pulley 52. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

Detailed Description of the Invention

  The present invention relates to a wheelchair used by an elderly person, a sick person, and a disabled person, and particularly to a reclining mechanism that is linked to a rear wheel moving mechanism.

  Japan has also entered an aging society, welfare equipment with advanced functions has appeared, and new technologies have also been introduced in the field of wheelchairs. It has become.

  The present invention was developed to be attached to the inventor's assistance function wheelchair (Japanese Patent Application No. 2002-238661), and the purpose of the present invention is to lift and lower the seating surface of the wheelchair. In a wheelchair having a mechanism), there is a problem that the stability of the wheelchair itself is lowered when it is lifted upward, and the wheelchair rear wheel is moved in conjunction with the reclining function, thereby improving the stability of the wheelchair. Is.

Means for solving the problem

  The lower part of the backrest 8 is held by a shaft 31, and toothed pulleys 32a and 32b are fixed to both left and right ends of the shaft. The toothed pulley is connected to the teeth of the relay portion 2 via timing belts 24a and 24b. Provided on the left and right side surfaces of the wheelchair, which is stretched on the pulleys 22a and 22b and is transmitted to the toothed pulleys 32a and 32b when the backrest 8 is tilted and transmitted to the relay unit 2 via the tamming belt. The toothed pulleys 22a and 22b and the toothed pulleys 23a and 23b are fixed on the same axes 21a and 21b, and timing belts 24a and 24b are stretched between the toothed pulley and the toothed pulley. Timing belts 13a and 13b are stretched between the pulleys 23a and 23b and the toothed pulleys 12a and 12b, and relay units 2a and 2b that transmit the rotational force of the tilting unit 3 to the transmission unit 1. The ends of the toothed pulleys 12a and 12b and the bent arms 5a and 5b are engaged with the gears 41a and 41b and the teeth in a state where they are in mesh with the toothed portions of the toothed plates 11a and 11b fixed to the other frames. The pulleys 42a and 42b are provided, and the transmission force of the timing belts 43a and 43b is linked with the gears 41a and 41b and the toothed pulleys in conjunction with the movement of rotating the bending arms 5a and 5b about the shafts 14a and 14b. 42a and 42b rotate while meshing the teeth of the toothed plates 11a and 11b, and the other ends of the bent arms 5a and 5b are toothed pulleys 52a and 52b and a gear 51a. , 51b are fixed on the same axis so as to be freely rotatable, and the gears 61a, 61b are pivotally attached to the ends of the arms 6a, 6b in mesh with the gears 51a, 51b, and the timing belts 43a, 43b. Is stretched around the toothed pulleys 42a and 42b and the toothed pulleys 52a and 52b. The rotational force of the toothed pulleys 42a and 42b is transmitted from the toothed pulleys 52a and 52b to the gears 51a and 51b, and the gear 61a. , 61b, and a folding mechanism for the wheelchair comprising the bent arms 5a, 5b and the open leg portions 4a, 4b on which the arms 6a, 6b swing.

  In a wheelchair having a reclining mechanism, a fixing bracket 110 is fixed to the upper portion of the backrest on the back side of the pillow portion 100, and the fixing bracket and the support plate 101 are pivotally supported by a shaft 104 so that the pillow portion is pivotally supported. Further, the pillow portion is folded by a shaft 105 provided with a guide groove 103 provided on the side surface of the fixed plate 102 so that the support plate slides up and down, and a lock arm 108 for fixing the pillow portion from the back side. The wheelchair reclining mechanism.

The invention's effect

  Since the wheelchair of the present invention has a lift function (function to move up and down the seating surface 9) and moves the rear wheel in conjunction with the reclining mechanism, the area for supporting the wheelchair itself is increased. By improving the stability of the car, we were able to ensure sufficient safety against unexpected movements of care recipients.

  Left and right toothed pulleys 32a and 32b are provided at both ends for pivotally supporting the backrest 8 of the wheelchair, the relay portions 2a and 2b are also provided on the left and right sides, the transmission portions 1a and 1b, and the left and right open leg portions 4a, The rear wheels 7a and 7b are arranged at the ends of the arms 6a and 6b in 4b. By tilting the backrest 8, the bent arms 5a and 5b and the arms 6a and 6b swing and are provided at the arm ends. The rear wheels 7a and 7b move rearward while maintaining parallel to each other.

  Further, the relay portions 2a and 2b are located on the side of the wheelchair around the shafts 21a and 21b, and the relay portion itself moves back and forth. As a feature of maintaining such a configuration, the seat surface 9 of the wheelchair is moved up and down. This is the result of devising to link the tilting section 3, the relay section 2, the transmission section 1 and the open leg section 4 when moved in the direction (not shown in the drawing).

  Preferred embodiments of the present invention will be illustratively described in detail below with reference to the drawings. However, unless otherwise specified, the scope of the present invention includes the construction method, construction apparatus, construction contents, construction parts, dimensions, material, shape, relative arrangement, and the like described in this embodiment. It is not a thing limited to them only, but merely an illustrative example.

(Structure of tilting part 3)
The lower part of the backrest 8 is held by a shaft 31, and toothed pulleys 32a and 32b are fixed to both left and right ends of the shaft. The toothed pulley is connected to the teeth of the relay portion 2 via timing belts 24a and 24b. The pulleys 22a and 22b are stretched.

(Operation of tilting part 3)
Since the backrest 8 is pivotally attached to the shaft 31, when the backrest 8 is tilted downward, the rotational force is transmitted to the toothed pulleys 32a and 32b and is rotated to the toothed pulleys 22a and 22b via the tamming belts 24a and 24b. Since the power is transmitted, the movement form shown in FIG. 3 is obtained.

(Structure of relay unit 2)
On the right side of the wheelchair, the toothed pulley 22a and the toothed pulley 23a are fixed on the same axis 21a, and a timing belt 24a is stretched between the toothed pulley 32a and the toothed pulley 22a. The timing belt 13a is stretched between the toothed pulley 12a and the timing belt 24b between the toothed pulley 32b and the toothed pulley 22b, and the toothed pulley 23b. A timing belt 13b is stretched between the toothed pulleys 12b.

(Operation of relay unit 2)
When the timing belts 24a and 24b transmit force to the toothed pulleys 22a and 22b, they are transmitted to the toothed pulleys 23a and 23b via the shafts 21a and 21b, and the toothed pulleys are also rotated. , 13b, the force for rotating the toothed pulleys 12a, 12b is transmitted.

(Structure of transmission unit 1)
The toothed pulleys 12a and 12b are fixed to the side surfaces of the bent arms 5a and 5b with pins 13a and 13b, and the toothed plates 11a and 11b and the gears 41a and 41b are engaged with each other so that the gears and the toothed pulleys are engaged. The pulleys 42a and 42b are fixed coaxially. The toothed plates 11a and 11b are fixed to other frames and assembled by bolts 14a and 14b and nuts 15a and 15b.

(Operation of transmission unit 1)
The rotational force of the toothed pulleys 12a and 12b moves in the direction of rotating the bending arms 5a and 5b around the bolts 14a and 14b, and the gears 41a and 41b and the toothed pulleys 42a and 42b rotate. The tooth portions of the toothed plates 11a and 11b are moved.

(Structure of the open leg 4)
The toothed pulleys 52a and 52b and the gears 51a and 51b are fixed to the bent arms 5a and 5b by pins 53a and 53b, the gears 61a and 61b are fixed by pins 62a and 62b at the ends of the arms 6a and 6b, and Gears 61a, 61b and gears 51a, 51b are engaged with each other, and timing belts 43a, 43b are stretched around toothed pulleys 42a, 42b and toothed pulleys 52a, 52b.

(Operation of the open leg 4)
Therefore, the rotational force of the toothed pulleys 42a, 42b is transmitted to the gears 61a, 61b by the rotational force transmitted to the toothed pulleys 52a, 52b and simultaneously transmitted to the gears 51a, 51b, and the arms 6a, 61b by the pins 62a, 62b. Since the bent arms 5a and 5b and the arms 6a and 6b swing around the bolts 63a and 63b, the rear wheels 7a and 7b provided at the ends of the arms 6a and 6b move. To do.

  On the right side of the wheelchair, the tilt part 3 → the relay part 2a → the transmission part 1a → the open leg part 4a, and on the left side of the wheelchair, the tilt part 3 → the relay part 2b → the transmission part 1b → the open leg part 4b.

(Composition of pillow part)
A fixing bracket 110 that fixes the pillow portion 100 on the back surface, a support plate 101 that is provided with a shaft 104 that is pivotally supported at the end of the fixing bracket, and left and right sides that are provided on the back surface of the backrest 8 on which the support plate slides. It comprises a shaft 105 for guiding the fixed plate 102 having a guide groove 103 disposed on the side surface, and a lock arm 108 for locking the pillow portion.

(Operation of the pillow)
According to FIG. 5, before the reclining mechanism is actuated (b), the folded pillow unit 100 releases the lock arm 108 and raises the pillow unit 100 upward (b). The fixed plate 102 is fixed by a lock arm 108, the pillow part concave fixing tool 106 and the pillow part convex fixing tool 107 are released, the pillow part is rotated 180 degrees around the shaft 104, and the pillow part is backrested. The pillow part is fixed by the pillow part concave fixing tool 106 and the pillow part convex fixing tool 107 when is substantially linear.

  Thus, after the pillow part 100, the backrest 8, the seating surface 9, and the footrest part 10 are set in a substantially horizontal shape and the cared person on the wheelchair is lifted up, the cared person is moved from the wheelchair to the bed. This is for transfer.

  This series of movements will be described with reference to FIG. 2. FIG. 2 shows a usage pattern when the user gets on and moves, and the folding arms 5a and 5b and the arms 6a and 6b swing in conjunction with the downward tilting force of the backrest 8. 3 shows this state in which the rear wheels 7a and 7b provided at the ends of the arms 6a and 6b move rearward, and when the backrest is further tilted, the backrest 8 and the seat surface 9 are placed on the footrest. The portion 10 is a flat surface, and the bent arms 5a and 5b and the arms 6a and 6b are linear, and this state is shown in FIG.

It is a perspective view of the present invention. It is a side view of the present invention. It is a side view of the present invention. It is a side view of the present invention. It is a side view of the pillow part of this invention. It is a rear view of the pillow part of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transmission part 1a, 1b Left and right transmission part 2 Relay part 2a, 2b Left and right relay part 3 Tilt part 4 Opening leg part 4a, 4b Left and right opening leg part 5a, 5b Left and right bending arm 6a, 6b Left and right arm 7a 7b Left and right rear wheels 8 Backrest 9 Seat surface 10 Leg rests 11a, 11b Left and right toothed plates 12a, 12b Left and right toothed pulleys 13a, 13b: 24a, 24b: 43a, 43b Left and right timing belts 21a, 21b Left and right Shafts 22a, 22b: 23a, 23b: 32a, 32b left and right toothed pulleys 31 shafts 41a, 41b: 51a, 51b: 61a, 61b left and right gears 42a, 42b left and right toothed pulleys 100 pillow part 101 support plate 102 fixed Plate 103 Guide groove 104: 105 Shaft 108 Lock arm 110 Fixing bracket

Claims (2)

The lower part of the backrest (8) is held by a shaft (31), and toothed pulleys (32a, 32b) are fixed to both left and right ends of the shaft, and timing belts (24a, 24b) are attached to the toothed pulleys. Via the toothed pulleys (22a, 22b) of the relay unit 2 and when the backrest 8 is tilted, the rotational force is transmitted to the toothed pulleys (32a, 32b) and transmitted to the relay unit 2 via the tamming belt. A tilting part (3)
The toothed pulleys (22a, 22b) and the toothed pulleys (23a, 23b) provided on the left and right side surfaces of the wheelchair are fixed coaxially (21a, 21b), and the timing is between the toothed pulley and the toothed pulley. Belts (24a, 24b) are stretched, and timing belts (13a, 13b) are stretched between the toothed pulleys (23a, 23b) and the toothed pulleys (12a, 12b). A relay unit (2a, 2b) for transmitting the rotational force to the transmission unit 1;
The ends of the toothed pulleys (12a, 12b) and the bent arms (5a, 5b) are engaged with the toothed portions of the toothed plates of the toothed plates (11a, 11b) fixed to other frames. Gears (41a, 41b) and toothed pulleys (42a, 42b) are provided, and the transmission force of the timing belt (43a, 43b) rotates around the bending arms (5a, 5b) about the shafts (14a, 14b). The transmission parts (1a, 1b) in which the gears (41a, 41b) and the toothed pulleys (42a, 42b) rotate while meshing with the tooth parts of the toothed plates (11a, 11b) in conjunction with the movement to be moved. When,
Toothed pulleys (52a, 52b) and gears (51a, 51b) are rotatably fixed on the other end of the bending arms (5a, 5b), and the gears (61a, 61b) are further armed. (6a, 6b) is engaged with the gears (51a, 51b) while being engaged with the gears (51a, 51b), and the timing belts (43a, 43b) are toothed pulleys (42a, 42b) and toothed pulleys (52a, 52b). The rotational force of the toothed pulleys (42a, 42b) is transmitted from the toothed pulleys (52a, 52b) to the gears (51a, 51b) and is centered on the shafts of the gears (61a, 61b). A reclining mechanism for a wheelchair, characterized in that it comprises a bent arm (5a, 5b) and an open leg (4a, 4b) in which the arm (6a, 6b) swings. In a wheelchair having a reclining mechanism, a fixing bracket (110) is fixed to the upper part of the backrest on the back side of the pillow portion (100), and the fixing bracket and the support plate (101) are rotated by a shaft (104). A shaft (105) provided so that the support plate slides up and down through a guide groove (103) provided on the side surface of the fixed plate (102), with the pillow portion freely pivoted.
The reclining mechanism for a wheelchair according to claim 1, wherein the pillow part is folded by a lock arm (108) for fixing the pillow part from the back.

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