Linear feedback device for an actuator

A linear feedback device for an actuator comprising:

• a body, a return gear wheel, a coiling belt, a driven member, and a sensing feedback device;
• wherein:
• the body is defined with a receiving space, wherein a rail is disposed therein;
• the return gear wheel is positioned on a pivot and disposed in the receiving space, the coiling belt winds around the return gear wheel, the return gear wheel is located adjacent to the rail, one end of the coiling belt is connected to a rotary end of the linear actuator, the return gear wheel moves synchronously with the coiling belt, wherein the return gear wheel and the coiling belt are driven to their original positions by a return elastic force;
• the driven member is slidably confined on the rail of the body, on a surface of the driven member is formed a plurality of teeth for meshing with the return gear wheel, a probe is disposed on one side of the driven member, the driven member is driven to move back and forth by the return gear wheel;
• and the sensing linear feedback device is disposed in the receiving space of the body and is located on the rail, the sensing linear feedback device has a sensing surface for contacting the probe of the driven member and for adjusting an output value of the sensing linear feedback device along with displacement of the probe.