Return mechanism, vehicle seat and return method thereof

A vehicle seat, comprising:

• a seat body, a backrest frame located at back of the vehicle seat, and a cushion frame located at a cushion of the vehicle seat, wherein the backrest frame is rotationally connected to the cushion frame through angle adjusters on both sides of the backrest frame, a brushless angle adjustment motor is installed on the backrest frame and is configured to adjust an angle of the angle adjusters, a rear end of the cushion frame is hinged to a slide rail located at bottom of the vehicle seat, and an angle of the cushion frame is adjusted by a pair of front angle adjustment mechanisms at front end of the cushion frame, wherein the front angle adjustment mechanism comprises a lifting motor, a first lifting link hinged to a driving screw of the lifting motor, and a second lifting link hinged to the front end of the cushion frame;
• wherein the vehicle seat comprises a return mechanism, the return mechanism being installed between the backrest frame and the angle adjuster and/or being installed to the pair of front angle adjustment mechanisms;
• wherein the return mechanism comprises:
• a rotating bracket power source, a rotating bracket, a spring, an unlocking bracket, a toothed plate bracket, and an energy absorber, wherein the rotating bracket is movably engaged with the unlocking bracket, teeth of the unlocking bracket are engaged with teeth of the toothed plate bracket, one side of the energy absorber is fixedly connected to the toothed plate bracket, one end of the spring is fixedly connected to the rotating bracket, and the rotating bracket power source is configured to push the rotating bracket to overcome a pulling force of the spring to rotate, so that the rotating bracket drives the unlocking bracket to rotate to enable the teeth of the unlocking bracket to separate from the teeth of the toothed plate bracket.