What is the function of the different structures of the wheelchair
large wheels
carrying the main weight. The diameter of the wheel is 51, 56, 61, 66cm. Pneumatic tires are often used, except for a few solid tires that are required by the use environment.
Small wheels
There are 12, 15, 18, 20cm diameters, and the larger diameter wheels are easy to cross small obstacles and special carpets . However, if the diameter is too large, the space occupied by the entire wheelchair becomes larger, making it inconvenient to move. The normal small wheel is before the big wheel, but in the wheelchair for paraplegics, the small wheel is often placed after the big wheel. It should be noted that the direction of the small wheel should be perpendicular to the big wheel, otherwise it is easy to fall.
Handwheel rims
It is unique to wheelchairs, and its diameter is generally 5cm smaller than the larger rims. When the hemiplegia is driven with one hand, an additional one with a smaller diameter is available for selection. The hand wheel rim is generally pushed directly by the patient. If the function is not good, in order to facilitate the drive, the following changes can be made: (1) Add rubber on the surface of the hand wheel rim to increase the grinding force. (2) Add knobs around the rim of the handwheel. There are the following types of push handles: ① Horizontal push handle. For C5 spinal injuries. Therefore, when the biceps are healthy, the hand is placed on the push handle, and the cart can be pushed forward by flexing the elbow. If there is no horizontal push handle, it cannot be pushed. ② Push the handle vertically. For rheumatoid arthritis when shoulder and hand joint movement is limited. Therefore, the horizontal push handle cannot be used. ③ Bold the push handle. It is used for patients with severely limited finger movement and it is difficult to make a fist. It is also suitable for patients with osteoarthritis, heart disease or the elderly.
Tires
There are solid, inflatable and tubeless inflatable types. The solid type travels faster on flat ground, is not easy to burst, and is easy to push, but it vibrates greatly on uneven roads, and it is not easy to pull out when stuck in the groove of the same width as the tire; The vibration is smaller than the solid one; the tubeless inflatable type will not puncture because the tubeless, and the inside is also inflated, it is comfortable to sit up, but it is more difficult to push than the solid one.
