JPS62149138U

JPS62149138U -

Info

Publication number: JPS62149138U
Application number: JP3649086U
Authority: JP
Priority date: 1986-03-12
Filing date: 1986-03-12
Publication date: 1987-09-21

Description

[Brief explanation of the drawing]

第１図ａ，ｂはそれぞれ本考案の圧電継電器の
第１の実施例を示す接点駆動部の斜視図、断面斜
視図、第２図、第３図はそれぞれ本考案の第２、
第３の実施例を示す接点駆動部の断面斜視図、第
４図、第５図はそれぞれ本考案の第４、第５の実
施例を示す接点駆動部の部分斜視図、第６図ａ，
ｂにそれぞれ従来の圧電継電器の接点駆動部の一
例を示す斜視図、断面斜視図である。１５，２５……変位拡大機構、２１……圧電駆
動体、２２，５２……駆動子、２３……駆動基板
、４４……温度補正部材、１５０，１５１，２５
１，２５２……ヒンジばね、１５３，１５３ａ，
２５３……腕体、１５３ｅ，１５３ｗ……固着端
、２５４……駆動突起、４４１……固定面、４４
２……固着面、４４５……温度補正基線。 Figures 1a and 3 are respectively a perspective view and a sectional perspective view of a contact drive section showing a first embodiment of the piezoelectric relay of the present invention, and Figures 2 and 3 are respectively a perspective view and a cross-sectional perspective view of a piezoelectric relay of the present invention.
FIGS. 4 and 5 are partial perspective views of the contact drive unit showing the fourth and fifth embodiments of the present invention, respectively. FIGS.
FIG. 1B is a perspective view and a cross-sectional perspective view showing an example of a contact drive unit of a conventional piezoelectric relay, respectively. 15, 25... Displacement magnifying mechanism, 21... Piezoelectric driver, 22, 52... Driver element, 23... Drive board, 44... Temperature correction member, 150, 151, 25
1,252...hinge spring, 153,153a,
253...Arm body, 153e, 153w...Fixed end, 254...Driving protrusion, 441...Fixing surface, 44
2...Fixed surface, 445...Temperature correction baseline.

Claims

[Claims for Utility Model Registration] (1) A plurality of piezoelectric elements that generate mechanical strain due to an applied voltage are integrally stacked such that a plurality of internal electrodes are alternately located between them, and a driver is attached to one end. a piezoelectric drive body provided with a free end and a fixed end at the other end; a drive board for fixing the fixed end of the piezoelectric drive body; and one end fixed to the drive board via a hinge spring and connected to the hinge spring. The piezoelectric drive body has an arm that is coupled and contacts the drive element, and a drive protrusion that expands the displacement of the drive element by the lever principle when the drive element presses the arm body, and moves by this displacement. a displacement magnifying mechanism having a coefficient of thermal expansion larger than a coefficient of thermal expansion; a fixed surface on which a fixed end of the piezoelectric drive body is installed; a surface fixed to the drive substrate; and a linear temperature correction baseline formed on the fixed surface. and a temperature correction member having a coefficient of thermal expansion larger than a coefficient of thermal expansion of a material constituting the displacement magnification mechanism,
A piezoelectric relay characterized in that at least one of the driver and the arm is made of a material having a thermal expansion coefficient comparable to that of the temperature correction member. (2) The piezoelectric relay according to claim (1), wherein the arm has a fixed end to which a hinge spring is fixed at the upper end of the longitudinal end surface. (3) The piezoelectric relay according to claim (2), wherein the fixed end is a protrusion formed on the end face of the arm body. (4) A plurality of hinge springs each fixed to both end surfaces in the longitudinal direction of the arm body are integrally formed in a U-shape,
2. The piezoelectric relay according to claim 2, wherein the hinge spring is fixed to the upper end surface of the side body to form the fixed end. (5) The thermal expansion coefficients of the piezoelectric drive body and the displacement magnification mechanism are d ₁ and d _{2 ,} respectively, and the thermal expansion coefficients of the temperature correction member, drive element, and arm body are α ₃₁ and α _{3 ,} respectively. ₂ and α ₃₃ , the length in the longitudinal direction of the piezoelectric driver is l ₁ , the distance between the temperature correction base line and the fixed surface is l ₃₁ , and the length of the driver in the same direction as the length l ₁ l ₃₂ , and the distance between the fixed end of the arm and the driver element is l ₃₃ , the distance l ₃₁ is expressed by the following three equations l ₃₁ (α ₃₁ −α ₂ )=l ₁ (α ₂ −α ₁ )
-l ₃₂ (α ₃₂ - α ₂ ) l ₃₁ (α ₃₁ - α ₂ )=l ₁ (α ₂ - _{α 1} )
−l ₃₂ (α ₃₂ −α ₂ ), l ₃₁ (α ₃₁ −α ₂ )=l ₁ (α ₂ −α ₁ )
-l ₃₃ (α ₃₃ −α ₂ ), The piezoelectric relay according to claims (1) to (4) for utility model registration, characterized in that it satisfies any one of the following.