JP2003126175A - Wheelchair equipped with all-wheel lock mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheelchair that is especially suitable for care having front and rear wheels all of which are equipped with a lock mechanism and controls rotation of the front wheels to suppress fluctuation so that a stable state of the wheelchair can be maintained in all the situation, for example, when a user transfers from a bed to wheelchair, from the wheelchair to the bed, or when the user gets on and off the wheelchair. SOLUTION: In the wheelchair A which has a seat part body B, a base body C for supporting and fixing the seat part body B having at least front wheels 4 and rear wheels 5, and the lock mechanism B provided to the rear wheels 5, the lock mechanism is also attached to the front wheels 4 so that all the wheels are equipped with the lock mechanism. The lock mechanism of the front wheels 4 is provided with an arm 18 one end of which is rotatably attached to the base body C and the other end is connected to a stopper 19, and a spring 25 one end of which is connected to the arm 18 and the other end to the base body C respectively to energize the stopper 19 toward the base body C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair having front wheels and rear wheels, and a lock mechanism provided on all of these wheels, which is particularly suitable for care. The present invention relates to a wheelchair equipped with an all-wheel lock mechanism that suppresses fluctuations and can maintain a stable state of a wheelchair when a user transfers from a bed to a wheelchair, from a wheelchair to a bed, or when getting on and off a wheelchair.

[0002]

2. Description of the Related Art Conventionally, as a nursing care wheelchair, a seating portion main body having a seat portion, a backrest, etc., which are not shown, and a base main body having front wheels and rear wheels for mounting and fixing the seating portion main body are provided. A wheelchair that is equipped with a lock mechanism only on the rear wheels is known.

[0003]

However, in the known wheelchair of this type, the brakes are provided only on the rear wheels and not on the front wheels, and therefore the front wheels are not braked, so that the front wheels wobble. For this reason, when the user transfers from the bed to the wheelchair, from the wheelchair to the bed, or when getting on and off the wheelchair, the stable state of the wheelchair cannot be maintained, and especially for the physically handicapped user. It's very dangerous.

Therefore, an object of the present invention is to provide a wheelchair having a seat body, at least a front wheel and a rear wheel, a base body for mounting and fixing the seat body, and a front wheel provided with a lock mechanism. , In addition, a lock mechanism is attached to the front wheels to equip all the wheels with a lock mechanism to control the rotation of the front wheels to suppress fluctuations, which allows the user to transfer from a bed to a wheelchair or from a wheelchair to a bed, for example. It is an object of the present invention to provide a wheelchair equipped with an all-wheel locking mechanism that can maintain a stable state of the wheelchair when the user gets on and off the wheelchair and that has improved the drawbacks of the above-described known art.

[0005]

In order to achieve the above object, according to the present invention, a seat body, a base body having at least a front wheel and a rear wheel for mounting and fixing the seat body are provided. A wheelchair having a lock mechanism on the rear wheels, and further, a lock mechanism is attached to the front wheels to equip all the wheels with a lock mechanism. The arm includes an arm that is freely attached and has a stopper connected to the other end, and a spring that has one end connected to the arm and the other end connected to the base body, and urges the stopper toward the base body. When it is rotated in the upright direction, the stopper comes into contact with the road surface to stand upright, the front wheels are lifted from the road surface to lock, and when rotated in the horizontal direction, the stopper is stopped. At the same time over rotates in the direction of the base body by a biasing force of the spring away from the road surface, wherein the front wheel is unlocked in contact with the road surface.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a side view of a specific example of a wheelchair according to the present invention, FIG. 2 shows an example of an exploded perspective view of a base body C according to the present invention, and FIG. 3 shows a base in an unlocked state. FIG. 4 is a perspective view of a main body, FIG. 4 is a perspective view of a base main body in a locked state, and FIG. 5 is a partial side view showing a locked state and an unlocked state of a stopper portion according to the present invention.

The wheelchair A in FIG. 1 has a seat body B and
The base body C is basically provided and configured.

The seat portion main body B includes a seat portion (not shown), a backrest 8 connected upward from the seat portion, and a headrest thereon.
12 and a foot rest 31 connected below and a foot rest 11 below the foot rest 31, and on the back side of the back rest 8, a brake lever for operating a drum brake 9 mounted on a rear wheel 5 described later. 14 and a wire 15 connecting the brake lever 14 and the drum brake 9 are provided. 30 is an elbow pad.

As shown in FIGS. 1 to 4, particularly FIG. 2, the base body C has base frames 1 and 1 arranged on both left and right sides, and an arbitrary number of cross frames 3 and 3 are arranged between the base frames 1 and 1. ..Bridge 3 and install side frames 2 and 2 upright on these base frames 1 and 1,
A front wheel 4 is attached to the front ends of the side frames 2 and 2, and an arbitrary number of seat cross frames 10, 10 ... 10 are installed between the side frames 2 and 2, and further behind the base frames 1 and 1. The rear wheel support piece 6 is upright, the rear wheel support piece 6 is provided with a drive shaft 7, and the rear wheel 5 is attached to the drive shaft 7. In the base body C, the seat portion (not shown) of the seat body B is placed on the side frames 2 and 2 and the seat cross frames 10 and 10, and the banquet 13,
The seat body B is placed and fixed at 13 places by fixing with screws or the like not shown. The rear wheel 5 is, as described above,
Equipped with a lock mechanism by the drum brake 9, the wire 15
The brake is operated by the brake lever 14 via. Reference numeral 16 is a road surface on which the front wheels 4 and the rear wheels 5 come into contact.

The feature of the present invention resides in that the front wheels 4 and 4 are also equipped with the lock mechanism and all the wheels are equipped with the lock mechanism.

The lock mechanism of the front wheel 4 has one end rotatably mounted on the cross frame 3 at an arbitrary position of the base body C and an arm 18 having a stopper 19 connected to the other end and a pin 24 of the arm 18 at one end. Hooks, and the other end is connected to the base body C, preferably the same cross frame 3 as described above, by a bolt 26, a nut 27, a bolt 28, and a nut 29, respectively, and a spring 25 for urging the stopper 19 to the side of the base body C. It is equipped with.

The stoppers 19 are preferably arranged on both the left and right sides, and are connected to each other by a flip-up frame 17. In this case, both stoppers 19 and 19 are penetrated by the flip-up frame 17 and both ends of the flip-up frame 17 are projected from the stoppers 19 and 19 to form foot grips 20 and 20.
Accordingly, by pushing or pulling one of the foot grips 20 and 20 with a foot, both stoppers 19 and 19 can be operated upright together, lying down, and the like. As shown in FIG. 2, a rubber 21 is attached to the bottom surface of the stopper 19 with a pin 22 to further increase the anti-slip effect, the road surface 16 is not scratched, and noise is not generated. It also helps prevent noise. The foot grips 20, 20 may be covered with covers 23, 23.

In the wheelchair A according to the present invention constructed as described above, when the foot grip 20 is pushed against the foot or the like to rotate the arm 18 in the upright direction, as shown in FIGS. Touches the road surface 16 and stands upright, and lifts the front wheels 4 from the road surface 16 and locks the front wheels 4 as shown in FIG. Then, the brake lever 14 is operated to tighten the drum brake, and the rear wheel 5 is also locked.

Further, when the foot grip 20 is pulled forward by a foot or the like and the arm 18 becomes larger than the angle of a ° as shown in FIG. 5, that is, the spring 25 causes the rotation axis of the arm 18 to rotate. When the arm 18 exceeds a and the arm 18 becomes a1 °, the arm 18 is rotated in the direction of the base frame 1 by the biasing force of the spring 25 and becomes horizontal, and at the same time, the stopper 19 separates from the road surface 16 and the front wheel 4 moves toward the road surface. Contact 16 and unlock. At the same time, by releasing the brake lever 14, the lock of the rear wheel 5 is also released.

According to the above-mentioned wheelchair of the present invention, all the front wheels and the rear wheels are equipped with the lock mechanism, so that the rotation of the front wheels is controlled to suppress the fluctuation, and the user can move from the bed to the wheelchair, for example. Alternatively, the stable state of the wheelchair can be maintained when transferring from the wheelchair to the bed or when getting on and off the wheelchair.

[Brief description of drawings]

FIG. 1 is a side view of a specific example of a wheelchair according to the present invention.

FIG. 2 shows an example of an exploded perspective view of a base body C according to the present invention.

FIG. 3 shows a perspective view of the base body in the unlocked state.

FIG. 4 shows a perspective view of the base body in a locked state.

FIG. 5 is a partial side view showing a locked state and an unlocked state of a stopper portion according to the present invention.

[Explanation of symbols]

A wheelchair B Seat body C base body a rotation axis 1 base frame 2 side frames 3 cross frame 4 front wheels 5 rear wheels 6 Rear wheel support piece 7 drive shaft 8 backrest 9 drum brake 10 seat cross frame 11 foot cradle 12 head support 13 Banquet 14 Brake lever 15 wires 16 road surface 17 flip-up frame 18 arms 19 stopper 20 foot grip 21 rubber 22 bottles 23 cover 24 pin 25 spring 26 bolt 27 nuts 28 volts 29 nuts 30 elbow pads 31 Footrest

Claims (3)

[Claims] 1. A wheelchair having a seat body, at least a front wheel and a rear wheel, a base body for mounting and fixing the seat body, and a lock mechanism for the rear wheel. , The front wheel is also equipped with a lock mechanism to equip all the wheels with a lock mechanism. One end of the lock mechanism of the front wheel is rotatably attached to the base body, and the other end is connected to a stopper and one end. Is connected to the arm and the other end to the base body, respectively, and a spring for urging the stopper toward the base body side is provided, and when the arm is rotated in the upright direction, the stopper comes into contact with the road surface. When standing upright, the front wheels are lifted from the road surface to lock, and when rotated horizontally, the stopper separates from the road surface and is biased toward the base body by the spring force. A wheelchair equipped with an all-wheel lock mechanism characterized in that the front wheels come into contact with the road surface and are unlocked at the same time when the wheel rotates in the same direction. 2. The wheelchair according to claim 1, wherein a rubber is attached to the contact surface of the stopper with the road surface. 3. The wheelchair according to claim 1, wherein the stopper is provided with a foot grip.