轮椅A self-propelled manual Wheel Chair incorporates a frame, seat, one or two footplates (footrests) and four wheels: usually two caster wheels at the front and two large wheels at the back. There will generally also be a separate seat cushion. The larger rear wheels usually have push-rims of slightly smaller diameter projecting just beyond the tyre; these allow the user to manouevre the chair by pushing on them without requiring them to grasp the tyres. Manual wheelchairs generally have brakes that bear on the tyres of the rear wheels, however these are solely a parking brake and in-motion braking is provided by the user’s palms bearing directly on the push-rims.
由于这导致摩擦和热积聚,特别是在长次拖船上,许多轮椅用户将选择穿衬垫的轮椅。手动轮椅通常在框架的上后部有两个推动手柄,以便通过第二个人进行手动推进,但许多有效的轮椅用户将删除这些,以防止不必要的推动那些相信他们正在有用的人。
Everyday manual Wheel Chair come in two major varieties, folding or rigid. Folding chairs are generally low-end designs, whose predominant advantage is being able to fold, generally by bringing the two sides together. However this is largely an advantage for part-time users who may need to store the wheelchair more often than use it. Rigid wheelchairs, which are increasingly preferred by full-time and active users, have permanently welded joints and many fewer moving parts. This reduces the energy required to push the chair by eliminating many points where the chair would flex and absorb energy as it moves.
焊接而不是折叠接头也降低了椅子的总重量。刚性椅子通常具有即时释放的后轮和靠背折叠平面的靠背,允许用户快速拆除椅子以存放在汽车中。几个轮椅尝试通过提供折叠刚性机构来组合两种设计的特征,其中当轮椅使用时,接头在机械上锁定。
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