Stroke-restricting device of linear actuator and wire-reeling mechanism thereof

A stroke-restricting device of a linear actuator, and the linear actuator comprising a base and a telescopic pipe, and the stroke-restricting device comprising:

• a box, fixed to the base, and the box having a wall plate, and a through hole formed on the wall plate;
• a movable member, including a rod passed through and coupled to the through hole, and capable of moving the box;
• a block, fixed to the rod;
• a pair of switches, fixed to the box and at positions corresponding to the block, and each of the switches having a trigger portion provided for contacting the block to generate an electrical signal, and the trigger portions being disposed at two opposite ends of a moving path of the block respectively;
• and
• a wire-reeling mechanism, installed at the telescopic pipe, and moved with the telescopic pipe, and the wire-reeling mechanism including a wire, and an end of the wire being coupled to the movable member;
• wherein, when the telescopic pipe is retracted inwardly to a limit position, the rod and the block are pushed and moved together, and the block will touch one of the trigger portions to stop retracting the telescopic pipe;
• and when the telescopic pipe is extended outwardly to a limit position, the wire pulls and moves the rod and the block together, and the block will touch the other trigger portion to stop moving the telescopic pipe.