JPH06139870A - Structure for switch - Google Patents

Abstract

PURPOSE:To suppress the generation of an arc when a moving contact piece is removed from a terminal board supporting it at the time of its rocking. CONSTITUTION:A moving contact piece 1 is supported on a terminal board 2 rockably at a rocking fulcrum section 3 in electrical excitation contact. The moving contact piece 1 is rocked via the spring force, and the moving contact 4 of the moving contact piece l is brought into contact with a fixed contact 5 or removed from it in the structure of a switch. An auxiliary spring 6 is fitted to the moving contact piece 1, and the auxiliary spring 6 is normally kept in slide contact with the terminal board 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch structure, and more particularly to a technique for suppressing the generation of an arc when the movable contact is separated from a terminal plate supporting the movable contact when the movable contact is rocked. Is.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
Is supported on the terminal plate 2 in a swingable fulcrum 3 so as to be swingable and in electrical contact therewith, and the movable contactor 1 is swung using the spring force of the operation spring 8 to move the movable contactor 1. In the structure of the switch for bringing the movable contact 4 into and out of contact with the fixed contact 5, the operating body 7 is pushed in from the state of FIG. The child 1 is swung in the direction of arrow A, and its movable contact 4 is brought into pressure contact with the fixed contact 5.

[0003]

However, in the case of such a structure, as the collision reaction force when the movable contact 4 is brought into pressure contact with the fixed contact 5, the acting force in the direction of arrow B in FIG. Due to such acting force, the movable contact 1 is separated from the terminal plate 5 for a moment, and an arc is generated between the two because of the separation of a portion which is always in contact with and electrically connected to. There is a problem in that the flying and the deterioration of the swing fulcrum portion 3 progresses early.

The present invention has been made in view of the above problems, and an object thereof is to generate an arc when the movable contactor is separated from the terminal plate supporting the movable contactor when the movable contactor swings. There is an attempt to provide a switch structure capable of suppressing the increase in the durability and increasing the durability.

[0005]

The present invention is directed to a movable contactor 1.
Is supported on the terminal plate 2 in a swingable fulcrum 3 so as to be swingable and in electrical contact therewith, and the movable contact 1 is swung using a spring force to move the movable contact 4 of the movable contact 1. Is a structure of a switch for bringing the fixed contact 5 into and out of contact with the fixed contact 5, wherein an auxiliary spring 6 is attached to the movable contact 1, and the auxiliary spring 6 is always in sliding contact with the terminal plate 5. It is a thing.

[0006]

When the movable contact 1 is swung to switch the contacts, the auxiliary spring 6 attached to the movable contact 1 slides on the terminal plate 5 which swingably supports the movable contact 1. In contact with each other, the movable contact 1 is electrically connected to the terminal plate 5 in the auxiliary spring 6 even if the movable contact 1 is separated from the terminal plate 5 for a moment due to the reaction force at the time of contact switching, and the movable contact 1 is separated from the terminal plate 5 at the opening. Suppresses arcing.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. A cover 10 is externally fitted and connected to the case 9, and a plunger-shaped operating body 7 is inserted into the inside of the case 9 so as to be freely pushed against the return spring 11, and the pushing position of the operating body 7 is the rotational cam 12. The rotary cam 1 is held by the motion and is pushed in by pushing the operating body 7 in the pushing position.
The operation mode is such that 2 rotates to return the operation body 7 to the original position. The design of the operating form of the operating body 7 can be changed in various ways.

A pair of terminal plates 2 and 2a is incorporated on the case 9 side, and a movable contact 1 is supported on one of the terminal plates 2 by being swingably and electrically conductively contacted at a swing fulcrum portion 3 thereof. Has been done. Specifically, the notch 13 of the movable contact 1
Is inserted into the support piece 14 of the terminal plate 2 so that the movable contact 1 is swingably supported by the terminal plate 2. An operation spring 8 serving as a spring for pressing a contact point is interposed between the cover 10 and the projecting piece 15 of the movable contact 1, and the movable spring 1 is pushed or pulled back by operating the operation body 7 to move the movable contact 1. By swinging the seesaw with respect to the terminal plate 2, it is possible to switch between a state in which the movable contact 4 of the movable contact 1 is in pressure contact with the fixed contact 5 of the other terminal plate 2a and a state in which the movable contact 4 is opened.

In this way, the movable contact 1 is swung by utilizing the spring force to move the movable contact 4 of the movable contact 1 to the fixed contact 5.
In the structure of the switch for making contact with and disconnecting from, the present invention is such that the auxiliary spring 6 is attached to the movable contact 1, and the auxiliary spring 6 is always in sliding contact with the terminal plate 5. Specifically, a pair of sliding contact plates 16 and 16 are formed substantially parallel to each other on an upper portion of a terminal plate 2 that supports the movable contact 1 so as to be swingable. The auxiliary spring 6 is provided on the lower surface of the movable contact 1.
A pair of spring pieces 17, 17 are extended from the auxiliary spring 6, and these spring pieces 17, 17 are always attached to the inner surfaces of the sliding contact pieces 16, 16 on the terminal plate 2 side, that is, opening and closing of contacts. Regardless of this, it is always in sliding contact.
The design of slidingly contacting the auxiliary spring 6 with the terminal plate 2 can be changed in various ways.

As described above, the auxiliary spring 6 is attached to the movable contact 1, and the auxiliary spring 6 is always in sliding contact with the terminal plate 5, whereby the movable contact 1 is swung to switch the contacts. In addition, the auxiliary spring 6 attached to the movable contact 1 is in sliding contact with the terminal plate 5 that supports the movable contact 1 so that the movable contact 1 can swing, and the movable contact 1 is connected to the terminal by the reaction force when the contacts are switched. Even if a break occurs from the plate 5 for an instant, the auxiliary spring 6 is electrically connected to the terminal plate 5 and suppresses arcing at the break.

The procedure for assembling the parts will be described with reference to FIG. 2. First, the terminal plates 2 and 2a are assembled in the case 9, and then the movable contact 1 having the auxiliary spring 6 attached thereto is swung. The operating body 7 is supported by the fulcrum portion 3, the operating body 7 is inserted into the case 9, the operating spring 8 serving as a contact pressure contact spring is inserted through the hole 18 of the operating body 7, and the end portion of the operating spring 8 is projected onto the movable contact 1. Put it in 15. In such a case, the auxiliary spring 6
Is in sliding contact with the sliding contact plates 16, 16 of the terminal plate 2 and the movable contact 1
The position of can be determined, and the operation spring 8 can be easily incorporated. That is, if the auxiliary spring 6 is not provided, it is difficult to determine the position of the movable contactor 1, and it becomes difficult to assemble the operation spring 8.

[0012]

As described above, according to the present invention, the movable contact is supported by the terminal plate so as to be swingably and electrically conductively contacted at its swing fulcrum, and the movable contact is utilized by the spring force. The structure of the switch is such that the movable contact of the movable contact is brought into contact with and separated from the fixed contact by swinging the movable contact, and an auxiliary spring is attached to the movable contact so that the auxiliary spring is always in sliding contact with the terminal plate. Therefore, in order to swing the movable contactor to switch the contacts, the auxiliary spring attached to the movable contactor is in sliding contact with the terminal plate that swingably supports the movable contactor.
Even if the movable contact breaks from the terminal plate for a moment due to the reaction force when the contacts are switched, the auxiliary spring is electrically connected to the terminal plate in the auxiliary spring and suppresses arcing at the breaking point. There is an advantage that you can. Moreover, the auxiliary spring is always in sliding contact with the terminal plate, so that the switch operation for opening and closing the contacts does not feel uncomfortable.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, in which (a) and (b) are side sectional views showing a contact switching action, and (c) is a plan view.

FIG. 2 is an exploded perspective view of the above.

FIG. 3 shows a conventional example, (a) is a side sectional view, and (b) is a partial perspective view.

4 (a) and (b) are side sectional views showing the same operation.

[Explanation of symbols]

 1 Movable contact 2 Terminal plate 3 Swing fulcrum 4 Movable contact 5 Fixed contact 6 Auxiliary spring

Claims (1)

[Claims] 1. A movable contactor is supported by a terminal plate in a swingable fulcrum portion so as to be swingable and in electrical contact with the terminal plate, and the movable contactor is swung using a spring force. Of the switch for contacting and separating the movable contact with the fixed contact, wherein an auxiliary spring is attached to the movable contact, and the auxiliary spring is always in sliding contact with the terminal plate. Construction.