Mobile terminal

A mobile terminal, comprising:

• a middle frame comprising a bottom wall and a side wall bent and extending from the bottom wall to form a receiving space with the bottom wall,
• a main screen arranged on the middle frame,
• a secondary screen arranged on the middle frame, wherein the secondary screen is arranged, in a folded state, at a back side of the main screen or arranged at a side of the main screen in parallel, and
• at least one piezoelectric actuator fixed in the middle frame, wherein a side of the piezoelectric actuator is fixed and connected to the bottom wall, and another side of the piezoelectric actuator is fixed and connected to the secondary screen;
• the piezoelectric actuator is configured to convert transverse deformation of the piezoelectric actuator into a longitudinal driving force to drive the secondary screen to vibrate and sound and provide tactile feedback for the secondary screen,
• wherein the piezoelectric actuator comprises a piezoelectric body and two sets of elastic brackets arranged at two ends of the piezoelectric body in a telescopic direction of the piezoelectric body;
• each set of elastic brackets comprises a first elastic sheet and a second elastic sheet spaced from each other along a thickness direction of the piezoelectric body;
• a first end of the first elastic sheet is fixed to a first surface of the piezoelectric body, and a second end of the first elastic sheet is fixed and connected to the secondary screen;
• and
• a first end of the second elastic sheet is fixed to a second surface of the piezoelectric body, and a second end of the second elastic sheet is fixed and connected to the middle frame.