JPS60150532A - Logic operation type 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 (A) Field of the Invention The present invention relates to a logic-operated WIJ relay, particularly to a multi-pole logic-operated relay using electromechanical transducers such as piezoelectric elements and electrostrictive elements.

(Background of the invention) Normal control relays that have been provided in the past attract a movable iron core and a movable iron piece by applying voltage to a coil wound around a fixed iron core, and based on this suction operation, a contact mechanism ( electrical circuits).

However, since this type of control relay uses an iron core or coil, there is a limit to how it can be made smaller and thinner, and it is especially difficult to make it have a multi-pole structure and perform logical operation with a single relay. It is.

OBJECT OF THE INVENTION Therefore, an object of the present invention is to provide a multi-polar structure that is small and thin and can open and close each contact independently, while at the same time providing a multi-pole structure that can perform logical operations using multiple relays. I was going,
It is an object of the present invention to provide a multi-pole logic operation type relay that can perform logic operations with one relay.

2) Structure and Effects of the Invention In order to achieve the above object, the logic operation type relay according to the present invention comprises two electromechanical transducer thin bodies each having surface electrodes on both sides, sandwiching an intermediate electrode body between them. A plurality of joined electromechanical conversion actuators are arranged side by side with one end supported by a cantilever, and a contact mechanism is formed by a movable contact attached to the other end of the actuator and a fixed contact opposite thereto. The present invention is characterized in that by applying a voltage to each of the conversion element thin bodies, each of the actuators generates mechanical displacement or not depending on the combination of voltage application and non-application, and the contact mechanism opens and closes.

That is, according to the above configuration, since a plurality of electromechanical conversion actuators are arranged in parallel, the multi-pole contact circuit can be operated logically by individually applying a voltage between the small intermediate electrode body and each surface electrode. can be done.

(e) Explanation of the embodiments Figures 1 to 4 show the first embodiment of the logic operation type relay according to the present invention.
An example is shown, in particular one in which a piezoelectric bimorph is used as an electromechanical transducer actuator.

FIG. 1 is a perspective view of this piezoelectric bimorph, with symbols 1,
As shown in 2.3, three pieces are arranged in parallel. The piezoelectric bimorph 1 includes an intermediate electrode body 4, two thin piezoelectric elements la and lb joined with the intermediate electrode body 4 in between, and a surface mold 11c1 formed on the front and back surfaces of the thin piezoelectric elements 1a and 1b.
1dll'elle, and the surface electrode 1e+1
They are joined so that the directions in which the electrodes e contact the intermediate electrode body 4, that is, the directions of polarization axes indicated by arrows in FIG. 1, face each other. The other piezoelectric bimorphs 2 and 3 are also constructed in the same manner as the piezoelectric bimorph 1.

Moreover, the piezoelectric element thin body 1 of the piezoelectric bimorph 1, 2.3
a, 2a, and 3a are integrally formed with a connecting portion 5.6 at one end, and are a single plate having a comb tooth shape. On the other hand, the surface electrodes IC, 2C, and 3C are formed individually and electrically insulated from each other. Similarly, piezoelectric thin bodies 1b, 2b,
3b is also integrally formed at one end, and the surface electrodes 1d, 2d, 3d and ie+2e, 3e are also individually insulated. And piezoelectric bimorph 1,
2.3 is cantilever supported by the support member 7 at one end, and the other end (
As shown in FIG. 2, the free end has a movable contact 16a.

17a and 18a are attached, and fixed contacts 10, 11, and 12 opposite thereto are fixed to terminals (not shown).

The circuit consisting of the DC power supply 8 and the switches S and SW2 shown in FIG. 1 is the basic form of the power supply circuit to the piezoelectric bimorph 3. By turning on the switches SW A voltage of negative polarity is applied to the surface electrodes 3C and 3d, and a voltage of positive polarity is applied to the surface electrodes 3C and 3d. When the switch SW is turned on and SW2 is turned off, the piezoelectric bimorph 3 is displaced upward, and when the switch SW is turned off and SW2 is turned on, the piezoelectric bimorph 3 is displaced downward, and the movable contact 16C contacts the fixed contact 12. An output signal is emitted.

Note that the switch SW1. When both SW2 are on, the upward and downward displacements of the piezoelectric bimorph 3 cancel each other out, and the piezoelectric bimorph 3 is not displaced in any direction. The other piezoelectric bimorphs 1 and 2 are similarly driven by their respective power supply circuits.

FIG. 3 is a connection circuit diagram for logically operating the above-mentioned relay, in which the lead wires 21 and 31 for power supply are connected to the surface electrodes 1d and lc of the piezoelectric bimorph 1, and similarly, the lead wires 22 and 32 are connected to the surface electrodes 1d and lc of the piezoelectric bimorph 1. Surface electrodes 2d, 2 of piezoelectric bimorph 2
In c, the lead wires 23° 33 are connected to the surface electrodes 3 d and 3 c of the piezoelectric bimorph 3. Further, the lead wire 20 is connected to the intermediate electrode body 4. switch 5W
31SW4ISWs are for turning on and off the voltage application from the DC power supply 8, and are for piezoelectric bimorph 3 respectively.
It is for control of ゜2.1. Resistors R□, R2, and 3 are inrush current limiting resistors inserted in the lead wires 23, 22.21, and resistors R4, R5, and R6 are inserted between the lead wire 20 and each lead wire 23, 22, and 21. It is a discharge resistance. Further, the arrow in FIG. 3 indicates the direction of the polarization axis of the thin piezoelectric element.

In the above configuration, when the switch SW3 is turned on, the piezoelectric bimorph 3 is displaced downward in FIG. 2, and the contacts 16C, 12
is closed. At the same time, the piezoelectric bimorph 2 is displaced upward, but the contacts 16b and 11 remain separated. Similarly, switch sw4. When sw5 turns on alone,
Contacts 16b, 11 and 161.10 are closed, respectively.

However, for example, switch Sw3. When SW4 is turned on at the same time, contacts 16C and 12 are closed, but contact 16b,
11 remains open. This is the thin piezoelectric element 2a
- This is because the voltages applied to both 2b cancel each other's displacements. Also, switch sw3
．． sw4. When all of sw5 are turned on, contact 16a
, 10 and 16b, 11 and 16c.

12 remains open, and the contact circuit remains disconnected.

FIG. 4 expresses the above operation as a logic circuit, and the contact output is an AND gate AND3°AND4. AN
D5 and one input to ANDKATE is inverted at each converter.

For example, switch SWa is month]'', switch sw4.
When sw5 is ゞL', ``)(0, (')l'' is input to the AND gate AND3, and the contact 12 becomes ``H''. %L # is input to the other AND gate ANJ)4.

'L' is input, and the contact 11 becomes IL''.L'' and ``HO are input to another AND5, and the contact 10 becomes 'L'.

FIG. 5 shows the second embodiment, and FIG. 6 shows its operation as a logic circuit.

This second embodiment is a neutral type logic-operated relay that makes more effective use of the displacement of the piezoelectric bimorphs 1, 2.3, and has movable contacts 17a + 17b + 17C added to it, as well as fixed contacts opposite to it. Contacts 13.14.1
5. Each contact 17a, 13 and 17b,
14, 17C, 15 are closed only when each piezoelectric bimorph 1.2.3 is displaced upwards, and all contacts remain open when in the neutral position. The drive circuit is the same as that shown in FIG. 3. For example, when the switch SW3 is turned on, the piezoelectric bimorph 3 is displaced downward and the contacts 16C and 12
At the same time, the piezoelectric bimorph 2 is displaced upward and the contacts 171) and 14 are also closed. If shown in the logic circuit of FIG. 6, ANDKATE ANI)3. AND4 is I
The result is H".

Note that the logic operation aIJ relay according to the present invention is not limited to the above-mentioned embodiments, and can be variously modified within the scope of the gist thereof. For example, instead of a piezoelectric piezomorph, an electrostrictive actuator may be used in which two thin electrostrictive elements each having surface electrodes on both sides are joined together through an intermediate electrode body.

Here, to briefly explain the difference between a piezoelectric element and an electrostrictive element, a piezoelectric element exhibits first-order electromechanical interaction using the inverse piezoelectric effect, and the strain X□ is x = dxE...・(
d: piezoelectric constant, E: electric field. On the other hand, electrostrictive elements utilize the electrostrictive effect.
In order to show the effect of the following electric machine, strain X2 is expressed as x = M x E2... [21 M: electrostriction constant, E: electric field.

Therefore, in the electrostrictive element, a strain proportional to the square of the electric field can be obtained regardless of the direction of the applied voltage, and the original processing required for the piezoelectric element is unnecessary.

Furthermore, in each of the above embodiments, the electromechanical transducer thin body (piezoelectric thin body 1a, lb, 2a, 2b, 3a, 3b) was formed from a single plate, so that the electromechanical transducer actuator had uniform characteristics. In addition, cantilever support is easy. However, in the present invention, it is not necessary to limit the electromechanical transducer thin body to a single plate, and a plurality of elongated electromechanical transducer actuators that are completely separately produced may be arranged in parallel.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention.
2 is a perspective view of a piezoelectric bimorph, FIG. 2 is a schematic perspective view of a relay, FIG. 3 is a drive circuit diagram, and FIG. 4 is a logic circuit diagram. FIG. 5 is a schematic perspective view of the relay of the second embodiment, and FIG. 6 is its logic circuit diagram. 1.2.3...Piezoelectric bimorph, la, lb...
Piezoelectric element thin body, lc, ld, le... surface type 1j, 4
...Intermediate electrode body, 5,6...Continuous part, lO~1
5...Fixed contact, 16a-17C...Movable contact, S
W1~SW5...Switch. Patent applicant Tateishi Electric Co., Ltd.

Claims (4)

[Claims] (1) A plurality of electromechanical transducer actuators in which two electromechanical transducer thin bodies each having surface electrodes on both sides are joined with an intermediate electrode body in between are arranged side by side with one end supported in a cantilever manner, and the actuators are A contact mechanism is formed by a movable contact attached to the other end and a fixed contact opposite to the movable contact, and by applying a voltage to each of the thin electromechanical transducer elements, each of the actuators can generate a combination of voltage application and non-voltage application. Logic operation 211J is characterized in that mechanical displacement occurs or not at , and the contact mechanism opens and closes. (2) The electromechanical transducer thin body is integrally formed at one end supported in a cantilever manner, and the surface electrode is formed separately for each actuator. Logic-operated relay. (3) A patent claim characterized in that the actuator is composed of a piezoelectric bimorph in which two thin piezoelectric elements each having surface electrodes on both sides are joined with an intermediate electrode body sandwiched between them so that their respective polarization axes face each other. Range 1 or 2
Logic-operated relay as described in section. (4) The actuator is an electrostrictive actuator in which two electrostrictive cable thin bodies each having surface electrodes on both sides are joined with an intermediate electrode body sandwiched therebetween. Logic-operated relay according to item 2.