PIEZOELECTRIC ACTUATOR AND CAPSULE ENDOSCOPE INCLUDING THE SAME

摘要

A capsule endoscope includes a power supply operably coupled to a piezoelectric element. The power supply is configured to provide an alternating electric signal to the piezoelectric element. A housing defines a cavity therein to receive the piezoelectric element and the power supply. The piezoelectric element is configured to frictionally couple with an inner circumferential surface of the housing to impart movement.

主权项

1. A piezoelectric actuator comprising:
a piezoelectric element formed in a substantially annular shape and configured to have vibrations of expansion and contraction generated therein by electric power repeatedly supplied thereto; an inner circumferential electrode formed on an inner circumferential surface of the piezoelectric element; and an outer circumferential electrode formed in plurality by being divided on an outer circumferential surface of the piezoelectric element.