Piezoelectric drive device and piezoelectric drive system having same

A piezoelectric drive system, comprising:

• a piezoelectric drive device, comprising:
• a frame comprising a deformable part, the deformable part comprising a first side arm, a second side arm opposite to the first side arm, and a bottom arm connecting the first side arm and the second side arm, the first side arm and the second side arm being inclined towards each other with respect to the bottom arm;
• a first piezoelectric element and a second piezoelectric element, the first piezoelectric element being arranged between the frame and the first side arm of the deformable part, the second piezoelectric element being arranged between the frame and the second side arm of the deformable part, both the first piezoelectric element and the second piezoelectric element being configured to deform the deformable part;
• and
• an actuating part arranged on the bottom arm of the deformable part, and configured to move driven by a deformation of the deformable part;
• a movable member configured to be fitted with the actuating part of the piezoelectric drive device and to move under the drive of the actuating part;
• and
• a retaining spring arranged to the piezoelectric drive device and configured to retain the piezoelectric drive device to press the actuating part against the movable member.