Piezoelectric valve

Abstract

A piezoelectric valve comprising: an actuator that drives a valve body; a valve seat plate having a valve seat that separates from the valve body, and a discharge path; and a main body case that accommodates the valve seat plate. The actuator is provided with: a base part fixed to the valve seat plate; a piezoelectric element, one end of which is connected to an attachment surface of the base part, the piezoelectric element extending in a first length direction; a support part formed integrally with the base part and extending in a second length direction that is aligned with the piezoelectric element and intersects with the first length direction; an acting part that is connected to the other end part of the piezoelectric element and the tip end part of the support part, the acting part being displaced in accordance with the expansion and contraction of the piezoelectric element in a direction differing from both the first length direction and the second length direction; and a valve body driven by the displacement of the acting part. The main body case is provided with a gas supply opening through which a compressed gas is supplied, and a gas discharge opening through which the compressed gas supplied through the gas supply opening is discharged via the discharge path of the valve seat plate by the separating of the valve body and the valve seat.