Patent attributes
The disclosure is a linear actuator. A transmission mechanism includes a motor, a gear set and a screw rod. A releasing mechanism is disposed between the gear set and the screw rod and includes a driving gear, a first clutch, a second clutch and a sliding sleeve. A toggle restraining mechanism includes a stem, a rotating element and a restraining assembly. The rotating element has a restraining hole and a rotating arm. The restraining assembly includes a restraining presser, a restraining spring and an engaging element. The stem is moved to rotate the rotating element, the rotating arm is rotated with the rotating element to push the sliding sleeve. The sliding sleeve is pushed by the rotating arm to separate from the second clutch. The engaging element is engaged in the restraining hole to restrain the rotating element from rotating when the rotating element is rotated to a specific angle.
