DRIVE DEVICE, IMAGE ACQUISITION DEVICE, AND ELECTRONIC EQUIPMENT

摘要

Disclosed is a drive device that makes it possible to easily set the frequency of the drive waveform applied to a piezoelectric element while decreasing the obligation to consider resonance in a stationary member. The device is equipped with a piezo element (42), which expands and contracts according to a drive voltage, a transmission shaft (44), which receives the vibration produced by the piezo element (42), a stationary member that holds the transmission shaft (44) in a state in which the transmission shaft (44) can slide in the longitudinal direction of the transmission shaft (44), and a lens holder (31), which is displaced together with the piezo element (42) and transmission shaft (44) relative to the stationary member according to vibration of the piezo element (42). The piezo element (42) and the transmission shaft (44) move in the direction of movement of the lens holder (31) in synchronization with the lens holder (31) according to the vibration of the piezo element (42), when the piezo element (42) is separated from the stationary member. By employing this structure, the frequency of the drive waveform applied to the piezo element (42) can be set easily, without considering resonance in the stationary member.