Foldable wheelchair

Abstract

The foldable wheelchair comprises a chassis, a seat assembly provided with a seat rod and a backrest rod, and a supporting assembly provided with an upper front supporting rod, a lower front supporting rod and a rear supporting rod, the backrest rod is rotationally connected with the seat rod and extends downwards from the joint to form an extending part, and the two ends of the upper front supporting rod are rotationally connected with the middle of the seat rod and the middle of the lower front supporting rod respectively. The two ends of the lower front supporting rod are rotationally connected with the middle of the extending part and the front portion of the chassis respectively, and the two ends of the rear supporting rod are rotationally connected with the lower end of the extending part and the rear end of the chassis respectively, so that the two four-bar mechanisms between the seat rod and the chassis can be in linkage, operation is convenient, and comfort is good; the height of the seat rod during unfolding is changed, the adaptability is good, the chassis does not participate in folding, the safety is good, the lower front supporting rod, the rear supporting rod, the upper front supporting rod and the extending part are sequentially arranged in the left-right direction, the lower front supporting rod can abut against the rear supporting rod and / or the seat rod to form supporting during unfolding, one-way self-locking is achieved, and the structure is simple.

Description

technical field [0001] The invention belongs to the field of medical devices, and in particular relates to a foldable wheelchair. Background technique [0002] A wheelchair is a medical device used to assist patients in treatment and rehabilitation. It usually includes a seat, a backrest, and a wheel assembly used to drive the wheelchair to move. Most of the traditional wheelchairs are not foldable and take up a lot of space. To solve this problem, the market appears The folding of the foldable wheelchair mainly includes the folding action of the seat and the backrest and the lowering action of the seat height. The conventional foldable wheelchair has no linkage in these two actions, and needs to be carried out separately, which is inconvenient to operate. Foldable wheelchairs, but most of these wheelchairs are linked by the relative rotation of the front wheel bracket and the rear wheel bracket. Since the front and rear wheel brackets need to be set up, the size of the seat...

AI Technical Summary

Problems solved by technology

[0002] A wheelchair is a medical device used to assist patients in treatment and rehabilitation. It usually includes a seat, a backrest, and a wheel assembly for driving the wheelchair to move. Most traditional wheelchairs are not foldable and take up a lot of space. To solve this problem, there are A foldable wheelchair has been developed, and its folding mainly includes the action of folding the seat and backrest and lowering the height of the seat. Conventional foldable wheelchairs have no linkage between these two actions, and they need to be carried out separately, which is inconvenient to operate. There are also linkages that can be achieved Foldable wheelchairs, but most of these wheelchairs are linked by the relative rotation of the front wheel bracket and the rear wheel bracket. Since the front and rear wheel brackets need to be set fork, the size of the seat cannot be too large, the comfort is not good, and The change degree of the seat height is limited by the change degree of the folded seat and backrest, and it is difficult to adjust according to the actual demand of the seat height. When the seat is folded, the front and rear wheels will move closer to each other, which is easy to crush and crush people's feet and other parts. Poor safety and unstable after unfolding, it needs to be locked by an additional locking mechanism, and the structure is complicated

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