JPH04130462U - Electrical-mechanical converter - Google Patents

Abstract

(57) [Summary] [Purpose] Simplifies lead wire connection in an electro-mechanical transducer in which a plurality of piezoelectric bimorphs, each consisting of two piezoelectric ceramic sheets pasted together via shims, are held in parallel at predetermined intervals. to do. [Structure] A piezoelectric bimorph 1 is fitted into each clamping groove seat 6 of a conductive holding piece 5 formed with a plurality of clamping groove seats 6, and the piezoelectric ceramic sheets 2, 2 of each piezoelectric bimorph 1 are inserted.
The outer surface electrodes on the front and back sides of the electrodes were commonly connected via a conduction holding piece 5.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is an electro-mechanical converter that holds multiple piezoelectric bimorphs in parallel at predetermined intervals. Regarding equipment.

0002

[Conventional technology]

This type of electromechanical transducer uses two piezoelectric ceramic sheets bonded together using an adhesive or the like. The negative terminal (or positive The positive electrode ( Bay the tip of each piezoelectric bimorph by connecting the terminal (or negative electrode) and applying a voltage. This is used as a driving source, for example, as disclosed in U.S. Pat. No. 4,283,178. It was used as the activation source for the pressure-sensitive pin of a Braille trainer, as shown in As shown, it is used as a piezoelectric switch matrix.

0003

[Problem that the idea aims to solve]

By the way, in this type of electrical-mechanical converter with a conventional configuration, as shown in FIG. The base end of each piezoelectric bimorph a is made of an insulating material and has a plurality of clamping groove seats e. The conductive holding piece d is fitted into its clamping groove seat e to hold them in parallel, and each piezoelectric bar is The piezoelectric ceramic sheets b of immorph a, the outer electrodes on the front and back sides of b, and the conductive shim c. By connecting each lead wire f and soldering it to the required conductive path, electrical I was trying to ensure the connection.

0004 Therefore, three lead wires f, f, f are connected to each piezoelectric bimorph a. Since a large number of piezoelectric bimorphs a are arranged in parallel, the lead wire is connected at the base of the piezoelectric bimorph a. A large number of fs will be mixed, making wiring work troublesome and making wiring complicated. This may complicate circuit design or lead to electrical failure due to broken lead wires. There were problems such as making it easier. The present invention aims to solve the above-mentioned problems.

[0005]

[Means to solve the problem]

The present invention is a conductive holding piece made by bending a conductive metal piece to form a plurality of clamping groove seats. By fitting each piezoelectric bimorph into each clamping groove seat, each piezoelectric bimorph is One electrode on the front and back sides of the piezoelectric ceramic sheet is commonly connected via a conductive holding piece. It was retained.

[0006] Furthermore, a clamping groove is provided in the conductive shim that also serves as the other electrode that protrudes from the clamping groove seat. A seat is formed and the conductive terminal pieces, which are electrically independent from each other, are clamped in the clamping groove seats. Electrical connections are made using the

[0007]

[Effect]

The outer electrodes on the front and back sides of the piezoelectric ceramic sheet of the piezoelectric bimorph are used as common electrodes. Connect this to either the negative or positive pole of the power supply using a continuity holding piece, and connect each piezoelectric All you have to do is connect the conductive shim of the morph, so at least the connection with the conductive shim is Only lead wires are required.

[0008] Furthermore, if the connection to the conductive shim is also made using a conductive terminal piece, the piezoelectric bimotor The roof can be electrically connected and maintained by the fitting operation.

[0009]

【Example】

An embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows an embodiment of the present invention. Here, 1 is a piezoelectric bimorph, which consists of two piezoelectric ceramic sheets 2, 2. Laminated via conductive shim 3 made of conductive metal plate, adhesive such as epoxy resin The inner electrodes of the piezoelectric ceramic sheets 2, 2 are integrated with each other. In addition to connecting to the conductive shim 3, external electrodes are connected to the front and back sides of the piezoelectric bimorph 1. exposed.

0010 A large number of piezoelectric bimorphs 1 are held in parallel by metal conductive holding pieces 5. Ru. Then, as shown in FIG. 2, the conduction holding piece 5 is fixed to the frame 10 in the width direction. , the piezoelectric bimorph 1 is electrically connected to the printed circuit board 11 fixed to the frame 10. An electro-mechanical converter is constructed in the following manner.

[0011] The conduction holding piece 5 is made of a springy material such as brass or phosphor bronze, or gold plated thereon. It is constructed by bending a long piece of conductive metal with a plate, etc., and the U-shaped parts are arranged at regular intervals. A plurality of clamping groove seats 6 which open upward are formed, and the width of the opening is set to the piezoelectric bias. The thickness is slightly smaller than that of Morph 1. Then, a piezoelectric bimotor is attached to each clamping groove seat 6. The piezoelectric bimorph is inserted into the piezoelectric bimorph by pushing it in from above and creating a spring action. 1 is sandwiched between the piezoelectric ceramic sheets 2, 2 on the front and back sides of the piezoelectric ceramic The outer electrodes on the front and back sides of the sheets 2, 2 are pressed against both inner surfaces of the sandwiching groove seat 6 to establish electrical connection. I am trying to continue the process. This continuity holding piece 5 is connected to the negative side of a power source (not shown). connected to the pole. As a result, the outer electrodes on the front and back sides of the piezoelectric ceramic sheets 2, 2 are , will be connected as a common electrode by the conduction holding piece 5.

0012 The end of the conductive shim 3 of the piezoelectric bimorph 1 sandwiched between the sandwiching groove seats 6 is connected to the piezoelectric sensor. The conductive shims 3 protrude from between the lamic sheets 2 and 2, and each conductive shim 3 has a The lead wires 12 are connected to different conductive paths 13 of the printed circuit board 11 which are connected to the poles. At the same time, the end of the conductive holding piece 5 is connected to a printed circuit board that is electrically connected to the negative electrode of the power supply. It is connected to the conductive path 14 on the plate 11 via a lead wire 15.

[0013] Thus, the electro-mechanical converter includes one lead wire 1 for each conductive shim 3. Since the lead wire 12 is only connected, the circuit does not become complicated, and along with this, the lead wire 12 Failures due to breakage are suppressed as much as possible.

[0014] In the case of the above example, the electrodes on the front and back surfaces of the piezoelectric ceramic sheets 2 and 2 are connected to the negative electrode of the power source. Although the electrically conductive shim 3 is connected to the positive terminal of the same power source, these may be reversed.

[0015] FIG. 3 shows a second embodiment of the present invention, in which, in addition to the above-mentioned configuration, A conductive terminal in which a single clamping groove seat 8 is formed on a conductive shim 3 protruding from a clamping groove seat 6. Fit the pieces 7 and connect the conductive terminal pieces 7 to the required conductive paths 13 of the printed circuit board 11, respectively. It was designed to do so. In such a configuration, the conductive terminal piece 7 and the required conductive The connection to the electric circuit 13 may be made by a lead wire, but as shown in the figure, a conduction terminal Either form a connecting pin part 9 on the piece 7 to be inserted into the through hole of the printed circuit board 11, or By soldering to the conductive path, the printer can be connected without using the lead wire 12. It becomes possible to connect the required conductive paths 13 of the substrate 11.

[0016] In such a configuration, the piezoelectric bimorph 1 is connected to the conduction holding piece 5 and the conduction terminal piece. Just by fitting the piezoelectric bimorph 1 into the clamping groove seats 6 and 8 of 7, you can attach the piezoelectric bimorph 1 and its electric power. Since electrical connections can be made, assembly is simple and maintenance and replacement are easy. It has the advantage of In addition, the piezoelectric bimorph 1 is held by the continuity holding piece 5 and the continuity terminal piece 7. Therefore, it is stable and the conduction holding piece 5 can also be made smaller.

[0017] In FIG. 4, the clamping groove seats 6 of the conductive holding piece 5 are arranged with openings in front, and the clamping groove seats 6 An insertion hole 16 is formed inside, and a conductive terminal piece 7 is arranged behind the insertion hole 16 to Insert the conductive shim 3 of the bimorph 1 into the clamping groove seat 8 of the conductive terminal piece 7 through the insertion hole 16. This is related to the configuration arrived at. Even with such a configuration, the continuity holding piece 5 and the continuity terminal piece 7 The above-mentioned required effects can be achieved.

[0018]

[Effect of the idea]

The present invention consists of a conductive metal piece bent to form a plurality of clamping groove seats 6 for maintaining continuity. Piezoelectric bimorph 1 is fitted into each clamping groove seat 6 of piece 5, and each piezoelectric bimorph 1 The outer electrodes on the front and back sides of the piezoelectric ceramic sheets 2 and 2 are commonly connected through the conductive holding piece 5. The conductive shims 3 of each piezoelectric bimorph 1 are connected to each other with the required electrical power. At least the lead wire 12 is only connected to the conductive shim 3. It is only necessary. This simplifies the wiring and makes connection work easier. The overall configuration is simplified, making circuit design easier, and the breakage of the lead wire 12 Breakdowns can also be avoided as much as possible. Furthermore, the connection with the conductive shim 3 is also a conductive terminal. If the piece 7 is used, mounting and maintenance inspection of the piezoelectric bimorph 1 will be easy, and it will be stable. It has the effect of being able to maintain the

[Brief explanation of drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention showing a connection mode of a piezoelectric bimorph 1. FIG.

FIG. 2 is a plan view of essential parts of the electro-mechanical converter.

FIG. 3 is a perspective view of a second embodiment of the present invention showing a connection mode of the piezoelectric bimorph 1.

FIG. 4 is a plan view of a third embodiment of the present invention showing a connection mode of the piezoelectric bimorph 1.

FIG. 5 is a perspective view of a conventional configuration showing a connection mode of a piezoelectric bimorph a.

[Explanation of symbols]

1 Piezoelectric bimorph 2,2 Piezoelectric ceramic sheet 3 sims 5 Continuity holding piece 6 Clamping groove seat 7 Continuity terminal piece 8 Clamping groove seat 12 Lead wire

Claims (2)

[Scope of utility model registration request] Claim 1: In an electro-mechanical transducer in which a plurality of piezoelectric bimorphs, each consisting of two piezoelectric ceramic sheets pasted together via a shim, are held in parallel at a predetermined interval, a conductive metal piece is bent. By fitting a piezoelectric bimorph into each clamping groove of a conductive holding piece formed by forming a plurality of clamping grooves, one electrode on the front and back surfaces of the piezoelectric ceramic sheet of each piezoelectric bimorph can be connected to the conductive holding piece. An electro-mechanical conversion device characterized in that the device is commonly connected and held through the device. 2. A clamping groove is formed on a conductive shim that also serves as the other electrode that protrudes from the clamping groove, and conductive terminal pieces that are electrically independent of each other are clamped in the clamping groove. 2. The electro-mechanical conversion device according to claim 1, wherein the electrical connection is made by using a plurality of electrical connections.