JP3068925U - Wheelchair casters - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reduce running obstacles due to unevenness of road surface, pebbles, etc. in running a wheelchair, and obtain a caster excellent in running performance. The problem is solved by a gear mechanism in which caster wheels are always aligned in the same traveling direction.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an improved wheelchair caster.

[0002]

[Prior art]

 In conventional wheelchairs, the left and right rear wheels are rotated by arm strength to move forward and backward, and the steering wheel is operated at the same time, so casters are used for the front wheels, so each caster wheel is wheeled when it encounters an obstacle such as a bumpy bump on the road surface, pebbles, etc. There is a problem that the vehicle tends to turn sideways, the running directions of the left and right wheels become uneven, and the running performance steering wheel function and the like deteriorate.

[0003]

[Problems to be solved by the invention]

 As described in the related art, wheelchair casters have extremely poor running performance. The purpose of the present invention is to provide a wheelchair with improved running performance by a gear mechanism that constantly aligns the left and right wheels in the same running direction to people with lower limb disabilities, such as persons with lower limb disabilities.

[Means for Solving the Problems]

In order to achieve the above object, the present invention solves the problem by stabilizing traveling by a gear mechanism in which left and right caster wheels of a wheelchair are always aligned in the same traveling direction.

[Embodiment]

An embodiment of the invention will be described with reference to FIG. A main bevel gear A2 is fitted upward through the center of one main shaft 1 of the left and right casters, and a main bevel gear B2 is fitted downward through the center of the main shaft 1 of the other caster. Hawks 4 are welded to the lower ends of the forks 4 and wheels 5 are attached to the forks 4. The axes of the left and right bevel gears 3 are connected by a universal joint band 6 and rotate left and right. As the bevel gear 2 rotates left and right, the running direction is changed for both left and right wheels.

[0006]

[Effect of the invention]

 Since the present invention is constructed as described above, the running direction of the caster wheels is always aligned with the same running direction, and it is not disturbed. The driving performance is improved.

[Brief description of the drawings]

FIG. 1 is a front view of a caster in which left and right bevel gear mechanisms are connected by a band of a universal joint.

[Explanation of symbols]

1. Main axis of caster A2, one main bevel gear B2, one main bevel gear 3, bevel gear 4, fork 5, wheel 6, universal joint band 7, joint of bevel gear and universal joint band pin

Claims (1)

[Utility model registration claims] A main gear of two intersecting gears such as a bevel gear is fixed to the main shaft of each of the left and right casters, and one of the left and right is fixed upward and the other is fixed downward. The caster wheels, which are connected by a universal joint belt and rotate to the left or right, are supported by the fork at the lower end of the main shaft as the main gear rotates left and right.