JPH05250954A - Contactless contactor provided with operation switch - Google Patents

Abstract

PURPOSE:To provide a structure, in a contactless contactor provided with an operation switch, in which an actuator part to drive the operation switch can be manufactured at a low cost. CONSTITUTION:An operation pushbutton 7A installed through a cover 6 is integrally formed with plural plate springs. A spot-faced part 11 about a center of a throughhole is provided in an upper surface of a top plate of the cover 6, and the operation pushbutton 7A is installed in such a way that forward ends of the plate springs are contained in the spot-faced part 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a semiconductor element such as a thyristor or a triac as an opening / closing element of a main circuit, and has a contactless switch equipped with an operation switch for detecting an abnormality in the opening / closing element or for testing conduction. The present invention relates to a contactor, and more particularly, to a structure of an actuator section that operates its operation switch.

[0002]

2. Description of the Related Art A contactless contactor uses a semiconductor element such as a thyristor or a triac as an opening / closing element of a main circuit. It is widely used for various types of load switching because it has no wear parts, has a long life, and can withstand frequent switching. However, in such a contactless contactor, it is difficult to find out from the outside even if the used semiconductor element fails for some reason, and the function of the semiconductor element depends on the installation location of the contactless contactor. Since it is difficult to check the above, a circuit for checking such a failure and checking the function and an operating mechanism therefor are attached.

FIG. 6 is a plan view of a contactless contactor provided with an operation switch and an actuator section as such an operation mechanism, and FIG. 7 is a side sectional view of a main part. The base 1 is provided with terminal blocks 2 on both side surfaces, and a printed circuit board 4 is installed on the upper surface of the base 1 via columns 3. A control circuit composed of electronic components (not shown) and printed wiring is formed on the printed circuit board 4, and the control circuit controls a semiconductor element (not shown). This semiconductor element is configured as an opening / closing element of a main circuit (not shown), and is connected to the terminal block 2 via a lead wire (not shown). Further, the printed circuit board 4 is provided with an operation switch 5 which functions as a test switch or a reset switch for operating a circuit for finding a failure of the semiconductor element or checking the function, for example. Reference numeral 6 denotes a resin cover, and an actuator portion is provided immediately above the support column 3, the printed circuit board 4, and the operation switch 5. As shown in FIG. 8, this actuator portion is composed of an operating button 7 and a compressible coil spring 8. As shown in FIG. 9, when the upper protruding end of the operating button 7 is pushed by the fingertip 9, the lower protruding end is operated. The push button 5A of the switch 5 is pushed down to close the operation switch 5. Next, when the fingertip 9 is released from the operation button 7, the extension button of the compression coil spring 8 returns the operation button 7 to the original position shown in FIG. 8 and returns to the open position of the operation switch 5.

[0004]

The actuator portion having such a structure requires the operation button and a component such as a compressive coil spring which acts on the operation button. In addition, contactless contactors need to check the functions of various circuit elements and electronic parts to fulfill their functions, which tends to increase the number of operation switches attached. The number of points has increased and the number of man-hours for assembling these has considerably increased, and there have been problems in terms of parts inventory management and manufacturing costs.

The object of the present invention is to solve the above-mentioned problems.
An object of the present invention is to provide an actuator section with a small number of assembly steps by reducing the number of parts in a contactless contactor equipped with an operation switch.

[0006]

According to the present invention, a semiconductor element such as a thyristor or a triac is used as an opening / closing element of a main circuit, and an operation switch for detecting an abnormality of the opening / closing element or testing continuity is provided. In the contactless contactor, the opening / closing element and other components are housed in a case made up of a base and a cover covering the base, and the operation switch is arranged directly below the ceiling plate of the cover. In an arrangement in which an actuator section for operating the operation switch is provided at a position of a ceiling board facing the operation switch, the actuator section has an operation button having a shaft section inserted into a through hole provided in the ceiling board of the cover. It is assumed that the operation button has an integrally formed spring portion. The operation button constituting the actuator section for operating the operation switch is composed of a head portion, a shaft portion, and a leaf spring portion, which are integrally molded with an elastic material. The tip is housed in a counterbore provided on the upper surface of the cover ceiling plate of the case.

[0007]

Since the spring portion for applying the return spring pressure of the operation button is integrally formed with the operation button, the number of parts of the actuator portion is only one, and therefore the number of assembling steps is drastically reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view of an essential part of an embodiment of the present invention, and FIG.
1 is a cross-sectional view of a main part of the side surface of FIG. 1, FIG. 4 is an enlarged view of a portion viewed from the direction of arrow P of FIG. 3, and the same reference numerals as those in FIGS. This embodiment is different from the conventional example in the structure of the operation button 7A that constitutes the actuator section. That is,
The operation button 7A is a molded product of synthetic resin or the like, which is an elastic material, and is composed of a head portion, a shaft portion, and a leaf spring portion 10. The leaf spring portion is the same as when the operation button 7A is made by resin molding. Is molded into. Depending on the case, a structure formed of a spring steel material or the like may be implanted when the operation button 7A is resin-molded. The operation button 7A is attached by penetrating its shaft portion into the through hole 6A of the ceiling plate of the cover 6. The tip portion of the shaft portion is formed wider than the through hole 6A, but a slit is provided in the insertion direction, and when the shaft portion of the operation button 7A is pushed into the through hole 6A, the slit has the width. The operation button 7A bends by an amount and is easily attached to the through hole 6A. Further, a spot facing portion 11 is formed around the through hole 6A of the ceiling plate around the through hole 6A. In the figure, the spot facing portion 11 has a quadrangular shape, but the shape may be any shape. For example, in the case of a structure in which the number of the leaf springs 10 is three and the stability of support is maintained, it is also possible to form a counterbore as a circle as shown in FIG. The leaf spring part 1
The tip of 0 is attached so as to abut the bottom of the spot facing portion 11 (FIG. 4).

In order to operate such an actuator portion, when the head of the operation button 7A is pushed in the direction of the thick arrow with the fingertip 9 as shown in FIG. 5, the leaf spring 10 is compressed and the operation switch is pushed at the tip of the operation button 7A. The push button 5A of 5 is pushed to close the operation switch 5. When the fingertip 9 holding the head of the operation button 7A is released, the operation button 7A returns to its original state (FIG. 4) due to the elasticity of the leaf spring 10, and the push button 5A also returns to its original state (FIG. 4). The operation switch 5 is opened. At this time, the wide end of the shaft portion of the operation button 7A acts as a stopper, and the operation button 7A does not slip out of its mounting position.

[0010]

According to the present invention, since the leaf spring is integrally formed with the operation button as a compression spring for assisting the return operation of the operation button for pressing the push button of the operation switch, the number of parts of the actuator section is reduced. Also, the number of assembling work steps is reduced, and a non-contact contactor equipped with an inexpensive operation switch can be provided.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a plan view of an actuator unit different from FIG.

FIG. 3 is a side sectional view of a main part of an embodiment of the present invention.

FIG. 4 is an enlarged view of a portion viewed from an arrow P in FIG.

FIG. 5 is a cross-sectional view of the main parts of the operation button of FIG. 4 with the head pressed by a fingertip.

FIG. 6 is a plan view of a contactless contactor including a conventional operation switch.

7 is a cross-sectional view of the main part of the side surface of FIG.

FIG. 8 is an enlarged view of a portion viewed from an arrow Q in FIG.

FIG. 9 is a cross-sectional view of the main parts of the operation button of FIG. 8 with the head pressed by a fingertip.

[Explanation of symbols]

 1 Base 4 Printed Circuit Board 5 Operation Switch 5A Push Button 6 Cover 7A Operation Button 10 Leaf Spring Section 11 Counterbore Section

Claims (3)

[Claims] 1. A contactless contactor using a semiconductor element such as a thyristor or a triac as an opening / closing element of a main circuit and having an operation switch for detecting an abnormality of the opening / closing element or for testing conduction. The opening / closing element and other components are housed in a case consisting of a base and a cover covering the base, and the operation switch is arranged directly below the ceiling plate of the cover, and the ceiling facing the operation switch is provided. In a case where an actuator section for operating the operation switch is provided at the position of the plate, the actuator section is an operation button having a shaft section that is inserted into a through hole provided in the ceiling plate of the cover, and the operation button is integrated. A contactless contactor having an operation switch, characterized in that the contactless contactor is provided with a spring portion formed in a specific manner. 2. The operation button according to claim 1, wherein the operation button comprises a head portion, a shaft portion, and a leaf spring portion, and these are integrally molded with an elastic material. A contactless contactor equipped with a switch. 3. The contactless device having an operation switch according to claim 2, wherein the tip of the leaf spring portion is housed in a counterbore portion provided on the upper surface of the cover ceiling plate of the case. Contactor.