Linear actuator with cushion mechanism

A linear actuator, comprising:

• an actuator body (10), comprising a motor (13), a lead screw (151) and a retractable pipe (153), wherein the lead screw (151) is driven by the motor (13) to rotate, the retractable pipe (153) comprises a screw nut (157) screwed with the lead screw (151) for transmission;
• a rapid release mechanism (30), disposed on the lead screw (151) to release a driving relation of the motor (13) and the lead screw (151);
• and
• a cushion mechanism (50), disposed in the actuator body (10) and comprising an elastic member (51) and a deceleration structure (53), wherein the elastic member (51) is disposed on the lead screw (151) and located between the screw nut (157) and the deceleration structure (53), and the deceleration structure (53) comprises a rotation gear (531) driven by the lead screw (151) and a brake structure disposed corresponding to the rotation gear (531);
• wherein, when the screw nut (157) compresses the elastic member (51) and the elastic member (51) is deformed to make the rotation gear (531) be mechanically connected to the brake structure, a rotation speed of the rotating lead screw (151) is decelerated via the brake structure braking the rotation gear (531).

A linear actuator, comprising:

• an actuator body (10), comprising a motor (13), a lead screw (151) and a retractable pipe (153), wherein the lead screw (151) is driven by the motor (13) to rotate, and the retractable pipe (153) comprises a screw nut (157) screwed with the lead screw (151) for transmission;
• and
• a cushion mechanism (50), disposed in the actuator body (10) and comprising an elastic member (51) and a deceleration structure (53), wherein the elastic member (51) is disposed on the lead screw (151) and located between the screw nut (157) and the deceleration structure (53), and the deceleration structure (53) comprises a rotation gear (531) driven by the lead screw (151) and a brake structure disposed corresponding to the rotation gear (531);
• wherein, when the screw nut (157) compresses the elastic member (51) and the elastic member (51) is deformed to make the rotation gear (531) be mechanically connected to the brake structure, a rotation speed of the rotating lead screw (151) is decelerated via the brake structure braking the rotation gear (531).