Cylindrical piezoelectric actuator

Abstract

Abstract PURPOSE:To obtain an actuator comprising a cylindrical piezoelectric element by providing a cylindrical piezoelectric element mounted on a substrate while being insulated, an operating terminal subjected to axial elongation and contraction and displaced, and a spring for imparting compressive force in the axial direction. CONSTITUTION:An insulating support 5 is provided between a substrate 1 having U-shaped cross section and a cylindrical piezoelectric element 2. An operating terminal 3 is provided above the cylindrical piezoelectric element 2 so that it is displaced when being subjected to axial elongation or contraction. Compressive force is imparted by a spring arranged between the operating terminal 3 and the under face at the upper part of the substrate 1. Upon application of a voltage on an electrode lead 7, the cylindrical piezoelectric element 2 contracts axially and the operating terminal 3 displaces downward while being energized by the spring 4. By such arrangement, an actuator comprising a cylindrical piezoelectric element 2 can be obtained.

Inventors

• 👤 Yasuo Oguri
• 👤 康生 小栗
• 👤 Tetsuhiko Nishimura
• 👤 哲彦 西村

Bibliographic Details