Linear actuator convenient to operate

A linear actuator, comprising a drive motor, a transmission assembly, a rotary screw and a transmission nut, wherein the drive motor drives the rotary screw to rotate by the transmission assembly, and the rotary screw rotates to drive the transmission nut to move axially along the rotary screw;

• wherein the linear actuator further comprises:
• a clutch device, arranged between the transmission assembly and the rotary screw, and configured to connect or disconnect power between the transmission assembly and the rotary screw;
• a self-locking device, configured to generate frictional resistance to the rotary screw when the rotary screw rotates reversely, and comprising a release torsion spring configured to unlock the self-locking device;
• and
• a hand-pull release assembly, comprising a first driving member connected with the clutch device and a second driving member connected with the self-locking device, wherein the hand-pull release assembly has an initial state and a fully released state, when transitioning from the initial state to the fully released state, the first driving member is capable of driving the clutch device to disconnect the power, and the second driving member is capable of driving the release torsion spring to extend,
• wherein the transmission assembly comprises a transmission worm and a transmission worm wheel, the transmission worm is connected with the drive motor, the transmission worm wheel is sleeved outside the rotary screw, and the clutch device is arranged between the transmission worm wheel and the rotary screw, and
• wherein the clutch device comprises a coupling gear sleeve, the transmission worm wheel is provided with a gear slot matching for transmission with the coupling gear sleeve, and the coupling gear sleeve is sleeved on the rotary screw and is axially movable relative to the rotary screw.