JP3005373U - Auxiliary drive hand rim for wheelchair - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention allows a large wheel of a wheelchair to be equipped with a hand rim that can be driven only in the forward direction, so that the vehicle can travel forward without releasing the hand rim, enabling efficient driving operation on a slope. To [Structure] In the central portion of the hand rim portion 3 of the present invention, there is a hub portion 5 of a bearing having a one-way clutch, and this hub portion is attached to the central portion of the large wheel 1 of a conventional wheelchair. The hand rim part 3 of the present invention is located near the existing hand rim 2 of the large wheel of the wheelchair, but without contacting each other,
It is also mounted so as not to interfere with the movement of the user's hand.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wheelchair drive device.

[0002]

[Prior art]

 When running a wheelchair, the user's arm force is transmitted by repeatedly gripping and releasing the hand rims attached to the large left and right wheels.

[0003]

[Problems to be solved by the device]

 Especially when climbing uphill, the loss of power transmission cannot be escaped when the hand is released, and it is still difficult to climb uphill even today with the improvement of wheelchair ramps. Therefore, it is intended to eliminate the above-mentioned deficiency by swinging the hand rim portion of the present invention without releasing the hand.

[0004]

[Means for Solving the Problems]

 The present invention adds a hand rim that can be attached to the left and right large wheels of a wheelchair and driven and operated only in the forward direction by a one-way clutch. Efficient driving became possible.

[0005]

[Action]

 By repeating the swinging motion in the circumferential direction of the hand rim while holding the hand rim of the present invention, only the forward direction becomes a driving force and the wheelchair moves forward.

[0006]

【Example】

 An embodiment will be described below with reference to the accompanying drawings. 1 is an existing large wheel, and 2 is an existing hand rim. 3 is a hand rim portion of the present invention, and at the center of the hand rim portion 3, there is a hub portion 5 through a spoke portion 4. The hub 5 has a one-way clutch structure and is attached to the center of the large wheel 1.

The hand rim portion 3 of the present invention is located near the existing hand rim 2 of the large wheel, but is attached so as not to contact with each other and to prevent the movement of the user's hand. For normal driving, you can change the grip on the existing hand rim 2 and operate it.

The present invention may be attached to the existing large wheel 1 by a detachable method, or may be an operation function device incorporated in the product when the wheelchair is manufactured.

[0009]

[Effect of device]

 As described above, the user can drive only in the forward direction without releasing the hand rim portion of the present invention, which enables efficient uphill traveling.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a hand rim attachment of the present invention.

[Explanation of symbols]

 1 Large wheel 2 Hand rim 3 Hand rim part 4 Spoke part 5 Hub part (one-way clutch)

Claims (1)

[Scope of utility model registration request] 1. A hand rim that can be attached to the left and right large wheels of a wheelchair and can be driven and operated only in the forward direction.