Device for magnifying displacement of piezoelectric element and method of producing the same

摘要

A device for magnifying displacement of a piezoelectric element at a printing head is proposed. The displacement of a column shaped piezoelectric element due to applied voltage is transmitted to a contact member and is magnified via a displacement magnifying mechanism to drive a printing wire connected to the displacement magnifying mechanism. A temperature compensating member is disposed between a frame supporting the piezoelectric element and the piezoelectric element and/or between the contact member and the piezoelectric element, and gives a preload to the piezoelectric element to support in a fixed manner the piezoelectric element between the frame and the contact member. The temperature compensating member is plastically deformed to compensate for the deformation of the piezoelectric element due to temperature change.