A piezoelectric drive device includes: a piezoelectric vibrating portion including a vibrating body, a piezoelectric element disposed on at least one surface of the vibrating body, and a support portion supporting the vibrating body; an elastic member pressing the vibrating body against a driven member; and a heat conducting member disposed so as to be capable of changing a mutual positional relationship with the elastic member while maintaining a surface-to-surface contact state therewith.

This application relates to a drive assembly, a motor, and a terminal. The drive assembly includes a stator and a rotor. The stator includes an excitation part, a vibration part, a first fixed part, and a pushing part. The vibration part is connected to the excitation part. The first fixed part is connected to the vibration part, and the vibration part is located between the excitation part and the first fixed part along a first direction L. The pushing part is connected to the vibration part and the rotor. The excitation part is capable of vibrating, and the excitation part is capable of driving the vibration part to act. Under limiting by the first fixed part, the vibration part is capable of vibrating at least along the first direction L and a second direction W.

A driving component includes a fixing frame, a carrier unit and a magnetostrictive member. The carrier unit is configured to carry a component to be driven, and the carrier unit is connected to the fixing frame and configured to move relative to the fixing frame. The magnetostrictive member is connected with the fixing frame and the carrier unit and configured to control a position of the carrier unit relative to the fixing frame through expansion and contraction of the magnetostrictive member.