Wheel Chair一个自行的手动轮椅结合了一个框架，座椅，一个或两个脚踏板（脚凳）和四个轮子：通常在前面有两个施法轮，背面有两个大轮子。通常还会有一个单独的座垫。较大的后轮通常在轮胎以外的直径略小的推动边缘。这些使用户可以通过向椅子推开椅子而无需抓住轮胎来制定椅子。\ \
手动的Wheel Chairgenerally 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. As this causes friction and heat build-up, particularly on long downslopes, manyWheel Chair用户会选择穿垫轮椅手套。手动的wheelchairs often have two push handles at the upper rear of the frame to allow for manual propulsion by a second person, however many active wheelchair users will remove these to prevent unwanted pushing from people who believe they are being helpful.
Everyday manualWheel Chaircome 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. Welded rather than folding joints also reduce the overall weight of the chair. Rigid chairs typically feature instant-release rear wheels and backrests that fold down flat, allowing the user to dismantle the chair quickly for storage in a car. A few wheelchairs attempt to combine the features of both designs by providing a fold-to-rigid mechanism in which the joints are mechanically locked when theWheel Chairis in use.
评论
There are no reviews yet.