I'd like to introduce the wheelchair accessories, and the different wheelchair accessories and their functions. Ordinary wheelchair is generally composed of wheelchair frame, wheel, brake device and seat. The following is a brief description of the functions of the main components of the wheelchair.
1. Big wheel
It carries the main weight. The diameters of wheels are 51, 56, 61 and 66 cm. In addition to a few use environment requirements and use solid tires, more pneumatic tires.
2. Small wheel
There are 12, 15, 18 and 20 cm in diameter. The small wheel with large diameter is easy to cross small obstacles and special carpet. But the diameter is too big, the space occupied by the whole wheelchair becomes larger, and the movement is not convenient. The normal small wheel is in front of the big wheel, but in the wheelchair for lower limb paraplegia, the small wheel is often placed behind 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 topple
3. Handwheel ring
It is unique to the manual wheelchair, and its diameter is generally 5cm smaller than the big wheel rim. When hemiplegia is driven by one hand, a smaller diameter is added for selection. Handwheel ring is a very important part of manual wheelchair. Its quality is related to the feeling of manual wheelchair. The handwheel ring is generally pushed directly by the patient. If the function is not good, the following changes can be made for easy driving:
(1) Add rubber on the surface of handwheel ring to increase friction force.
(2) Add a push knob around the wheel rim.
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There are several types of push handles
① Horizontal push handle. For C5 spinal injury. Therefore, when the biceps brachii is healthy, put your hand on the handle and push forward by bending the elbow. If there is no horizontal push handle, it cannot be pushed.
② Vertical push handle. It is used for rheumatoid arthritis when shoulder and hand joint activity is limited. The horizontal push handle cannot be used at this time.
③ Bold push handle. It can be used in patients with severely limited finger movement and difficult to clench. It is also suitable for osteoarthritis, heart disease or elderly patients.
4. Tires
There are solid, inflatable tube and tubeless inflatable three. The solid type walks fast on the flat ground and is not easy to explode and push, but it vibrates heavily on the uneven road and is not easy to pull out when it is stuck in the groove with the same width as the tire; The ones with inflatable inner tube are difficult to push and easy to puncture, but the vibration is smaller than that of the solid ones; The tubeless inflatable type is more difficult to push than the solid one because it can't puncture, inflate the inside and sit comfortably.
5. Brake
The big wheels should have brakes on each wheel. Of course, when the hemiplegic can only use one hand, they have to use one hand brake, but they can also install extension rods to control the brakes on both sides. Brake is an important part of electric wheelchair accessories, which provides a good guarantee for the safety performance of electric wheelchair.
There are two types of brakes:
(1) Notched brake. This brake is safe and reliable, but it is more laborious. After adjustment, it can also be braked on the slope. If it is adjusted to level 1, it will be invalid if it cannot be braked on the flat ground.
(2) Elbow brake. Using lever principle and braking through several joints, its mechanical advantage is stronger than notch brake, but its failure is faster. In order to increase the patient's braking force, we often add an extension rod on the brake, but this rod is easy to be damaged. If we don't check it often, it will affect the safety.
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