JPS62243219A - Piezoelectric relay - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a piezoelectric relay that utilizes curvature caused by an electrical load on a piezoelectric element used as a relay circuit for various industrial electronic control devices.

Conventional technology In recent years, electronic devices have become more power efficient, and conventional electromagnetic relay devices consume a lot of power.
There is a growing tendency to try to save power by applying the strain phenomenon of piezoelectric elements to IJ.

Hereinafter, a conventional piezoelectric relay will be described with reference to the drawings. Conventionally, this type of piezoelectric relay has had a configuration as shown in FIG. In FIG. 3, 1 is a support base that supports one end of the bimorph 2 made by bonding piezoelectric elements 2a and 2b, 3 is a movable contact attached to the tip (other end) of the bimorph 2, and 4 is a support base 1. Shows installed fixed contacts.

The operation of the conventional piezoelectric relay configured as described above will be described below. Now, when an input voltage is applied from other control parts (not shown) such as a timer to the bimorph 2 formed by bonding the piezoelectric elements 2& and 2bf, the bimorph 2 moves to the third position in proportion to this input voltage. It is curved as shown by the two-dot chain line. (This phenomenon is well known and the principle itself is not directly related to the present invention, so the explanation along with the wiring will be omitted.) At this time, the movable contact 3 provided at the tip of the bimorph 2 is connected to the fixed point provided on the support base 1. Another control component (
(not shown) becomes ON and operates, and conversely, when the input voltage applied to Bimorph 2 is released, Bimorph 2 returns to its original state, and movable contact 3 and fixed contact 4 are separated and become OFF. This will cause the control parts to stop operating.

Problems to be Solved by the Invention In such a conventional configuration, as shown in FIG. - Since the OFF switching is performed, there are problems such as a chattering phenomenon when switching the contacts, and problems such as burning of the contacts and poor contact in terms of durability.

The present invention solves these problems and aims to provide a piezoelectric relay that is less likely to cause chattering and has high reliability in terms of durability.

Means for Solving the Problem In order to solve this problem, the present invention makes one end of a bimorph made by bonding two piezoelectric elements together in a cantilevered state, and provides a structure in which the other end of the bimorph is brought close to or in contact with the other end of the bimorph. A pressurized conductive rubber is placed on the surface.

Function: With this configuration, the tip of the curved bimorph presses the pressurized conductive rubber, thereby bringing the pressurized conductive rubber into a conductive state, thereby performing ON-OFF switching as a relay.

Embodiment FIGS. 1 and 2 are configuration diagrams showing a piezoelectric relay according to an embodiment of the present invention. In Figures 1 and 2, 5
7 is a support stand that fully supports one end of the bimorph 6 formed by bonding the piezoelectric elements 6a and eb'2 together, and 7 is a pressurizer attached to the support stand 6 in proximity to or in contact with the tip (other end) of the bimorph 6. Shows conductive rubber.

The operation will be explained below with reference to the drawings.

FIG. 1 shows a state in which the pressurized conductive rubber 7 is non-conductive before operation. In FIG. 2, when an input voltage is applied to the bimorph 6, the tip of the bimorph 6 curves and pressurizes the pressurized conductive rubber 7, and the pressurized conductive rubber 7 shows a conductive state (similar to the conventional example, the bimorph Since the curvature due to voltage application to 6 is well known, its explanation will be omitted along with the wiring.)

Effects of the Invention As described above, according to the present invention, one end of the bimorph formed by bonding two piezoelectric elements 1&: is in a cantilevered state, and the pressurized conductive rubber is placed close to or in contact with the other end of the bimorph. By disposing the bimorph, the tip of the bimorph can pressurize the pressurized conductive rubber and control the conduction state of the pressurized conductive rubber, enabling non-contact 0N-OFF switching, and mechanical contact It is possible to provide a highly reliable piezoelectric relay that does not cause problems such as chattering phenomenon or poor contact in terms of durability.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing the state before operation (OFF state) of a piezoelectric relay according to an embodiment of the present invention, FIG. 2 is a configuration diagram showing the state during operation (ON state), and FIG. It is a block diagram of a piezoelectric relay. 6... Support stand, 6... Bimorph, e
IL, eb...piezoelectric element, 7...pressurized conductive rubber. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
Figure 2 Figure 3

Claims (1)

[Claims] A piezoelectric relay in which one end of a bimorph made by bonding two piezoelectric elements is cantilevered, and a pressurized conductive rubber is placed close to or in contact with the other end of the bimorph.