1. HEALTH ACCESSORIES
WHEEL CHAIRS

2. Wheel chairs Defination:-
A wheelchair is a chair with wheels. The device comes in variations allowing either manual propulsion by the seated occupant turning the rear wheels by hand, or electric propulsion by motors. There are often handles behind the seat to allow it to be pushed by another person.
Wheelchairs are used by people for whom walking is difficult or impossible due to illness, injury, or disability. People who have difficulty sitting and walking often make use of a wheelbench.

3. History
The first records of wheeled seats being used for transporting the disabled date to three centuries later in China; the Chinese used their invented wheelbarrow to move people as well as heavy objects.

4. Basic information:-
A basic manual wheelchair incorporates a seat, foot rests and four wheels: two, caster wheels at the front and two large wheels at the back. The two larger wheels in the back usually have hand-rims; two metal or plastic circles approximately 3/4" thick.

5. Types of wheel chairs
1.Manual Wheelchair:
A manual wheelchair is one that is propelled by the user. It is usually done by pushing on round bars that surround the wheels. This wheelchair also has handles on the back so it can be pushed by another person. A manual wheelchair is easy to maintain, is lightweight, and is the least expensive to buy.

6. 2.Electric Wheelchairs
Electric wheelchairs are propelled by a motor and battery. They are very sophisticated. They are operated with a joy stick or push buttons. Some electric wheelchairs use advanced technology and can climb up stairs, move across gravel and even raise up to give access to high shelves. Electric wheelchairs need strong frames to support the motor and battery so they are very heavy and also quite expensive. The average cost of an electric wheelchair is $7000 but can fall anywhere from $3000 to $30,000.

7. REFERENCE https://en.wikipedia.org/wiki/Wheelchair