JP3070606U - Wheelchair casters - Google Patents

Abstract

(57) [Summary] [Problem] To provide a caster in which running obstacles due to unevenness of road surface, pebbles, etc. are reduced in running of a wheelchair, and wheels are less likely to collapse on running on a mat or on a soft road surface. A mechanism is provided in which caster wheels are always aligned in the same traveling direction, and the load on each wheel is reduced by increasing the number of casters.

Description

[Detailed description of the invention] [Technical field to which the invention belongs]

 The present invention relates to an improved wheelchair caster.

[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. The wheels tend to be sideways and the running directions of the left and right wheels are uneven, and the heavy load on the caster wheels causes the wheels to collapse on mats and soft roads, making it difficult to drive.

[Problems to be solved by the invention]

 As described in the related art, wheelchair casters have extremely poor running performance. The purpose of this invention is to provide wheelchairs with improved running performance to persons with lower limb disabilities, etc. It is intended.

[Means for Solving the Problems]

 In order to achieve the above object, the present invention stabilizes the running as a mechanism in which the left and right caster wheels of the wheelchair are always aligned in the same running direction, and reduces the load on each caster by adding auxiliary casters. Solve.

[Embodiment]

 An embodiment of the invention will be described with reference to FIGS. Claims 1 and 2 Reference numeral 1 denotes a plate-like frame made of, for example, a synthetic resin. A bearing 3 for supporting a main shaft 2 of a caster is fitted in both right and left rules. The main gear 4 is fitted through the main shaft 2, the fork 5 is welded to the lower end of each main shaft 2, and the wheel 6 is attached to the fork 5. The left and right main gears 4 are linked by a synchro belt 7 or a play gear 8 and rotate in an interlocking manner to the left and right. Claim 3 An auxiliary caster having the same function as the left and right casters is additionally provided between the left and right casters. The main gear 4 of each caster is connected by an idle gear 8 and rotates in unison with the left and right. The running direction changes left and right as the main gear 4 rotates left and right.

[Effect of the invention]

 Since the present invention is configured as described above, the running directions of the caster wheels are always aligned with the same running direction, and the road is not disturbed. The load on the individual casters is also reduced, and the wheels are less likely to collapse on mats and on soft roads, improving running performance.

[Brief description of the drawings]

FIG. 1 is a side view of a caster,

2 is a plan view of a gear and a belt mechanism according to claim 1,

FIG. 3 is a plan view of the gear mechanism according to claim 2;

FIG. 4 is a plan view of the gear mechanism according to claim 3;

FIG. 5 is a sectional view of a frame bearing portion of the caster,

FIG. 6 is a front view of the caster according to claim 1;

FIG. 7 is a front view of the caster according to claim 3.

[Explanation of symbols]

 1, frame 2, main shaft 3, main bearing 4, main gear 5, fork 6, wheel 7, synchro belt 8, idle gear

Claims (3)

[Utility model registration claims] A main gear is fitted through a central portion of each of the main shafts of both the left and right casters, and the two gears are connected by a synchro belt or a chain. The caster wheels supported by the hawks are wheelchair casters that change the direction of travel along both the left and right wheels as the gears rotate left and right. 2. A main gear is fitted through a central portion of each of the main shafts of both the left and right casters, and the main gears are connected by an idle gear so that the main gears rotate in the right and left directions. The wheel is a wheelchair caster that changes the direction of travel along with the left and right wheels as the gears rotate left and right. 3. A main gear is fitted through a central portion of each of the plurality of casters at a central portion thereof. All the main gears are connected by idle gears and rotate in unison with both the left and right sides. The caster wheels attached are wheelchair casters that change the direction of the left and right running directions along with all the wheels as the main gear rotates left and right.