JPH071710Y2 - switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a contact mechanism of a switch, and its purpose is to provide stabilization of a contact part.

2. Description of the Related Art Conventionally, a contact mechanism of this type will be described with reference to a side sectional view of a switch shown in FIG. According to FIG. 4, the coil spring 8 and the pin 7 are housed in the lever 1, and the pin 7 is always brought into contact with the movable contact plate 3 by the coil spring 8 and the pin 7 is driven by swinging the lever 1. Thus, the movable contact plate 3 pivotally supported on the common terminal 5 is swung to open or close the fixed contact 9 of the individual terminal 6 and the fixed contact 10 of the movable contact plate.

Problems to be Solved by the Invention In such a conventional configuration, since the coil spring 8 and the pin 7 are incorporated in the lever 1 to drive and control the movable contact plate 3, assembly is complicated and there is a cost disadvantage. Further, there is a risk of contact welding between the movable contact plate 3 and the common terminal, which is disadvantageous as a switch for opening and closing a large current.

The present invention solves such a problem, and an object of the present invention is to provide a switch that is easy to assemble and can open and close a large current.

Means for Solving the Problems In order to solve the above problems, the present invention pivots an auxiliary contact piece having a substantially U-shaped curved portion rich in elasticity on the upper portion of a common terminal, and a movable contact is mounted on the auxiliary contact piece. A plate is pivotally supported, and a lever that comes into contact with and slides on the movable contact plate is provided on the movable contact plate.

Function As described above, the auxiliary contact piece is pivotally supported on the common terminal, and the movable contact plate is pivotally supported by the auxiliary contact piece, which facilitates the assembly of the switch and also enables the switch to be assembled between the common terminal and the movable contact plate. Is good, and the fulcrum of the movable contact plate moves up and down when the lever slides, so that the contact welding can be easily separated.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a side sectional view of a switch according to an embodiment of the present invention, FIG. 2 is a view for explaining the internal structure of the switch, and FIGS. 3 (a), (b) and (c) are It is a figure explaining the same operation. According to FIGS. 1 and 2, 12 is a case, and a common terminal 15 and an individual terminal 16 corresponding to the common terminal 15 are planted on the case 12, and 14 is the common terminal 15 described above.
It is an auxiliary contact piece that has a substantially U-shaped curved portion on the upper part and is pivotally supported on the common terminal 15. The movable contact plate 13 is pivotally supported on the auxiliary contact piece 14 and the movable contact plate 13 is The switch is provided with a lever 11 that abuts on the movable contact plate 13 and is swung by an external means to slide the tip of the lever 11 on the movable contact plate 13.

The details of the switch operation will be described with reference to FIGS. 3 (a), (b) and (c). From the lever 11a position (FIG. 3 (a)) to the lever 11b position (FIG. 3 (b)).
When it is rotated to, the auxiliary contact piece 14 is pivotally supported with the movable contact plate 13.
14a moves downward, the contact angle between the contact 19 and the contact 20 becomes A → B, the contact welding between the contact 19 and the contact 20 can be easily separated, and when the lever 11 is further rotated, the switch moves to the first position. The opened state shown in FIG. Although a substantially U-shaped auxiliary contact piece is used in this embodiment, it may be a substantially V-shaped auxiliary contact piece.

Effect of the Invention As described above, according to the present invention, the pin and the coil spring are eliminated and the auxiliary contact piece is provided, so that the assembly is facilitated and the switch can be inexpensive.

Further, the auxiliary contact piece provides good conduction between the common terminal and the movable contact plate. In addition, the lever operation can change the contact abutment angle when the contacts are closed and closed, and the contact welding can be easily released. It can also be used as a switch for opening and closing large currents, and is extremely reliable in terms of quality. It is a product that can supply switches with high safety and high safety.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the switch of the present invention, FIG. 2 is a view for explaining the internal structure of the same, FIG. 3 (a),
(B) and (c) are diagrams for explaining the same operation, and FIG. 4 is a sectional view of a conventional switch. 11 …… Lever, 12 …… Case, 13 …… Moving contact plate, 14…
… Auxiliary contact, 15 …… Common terminal, 16 …… Individual terminal.

Claims (1)

[Scope of utility model registration request] 1. A common terminal planted on a case, individual terminals corresponding to the common terminal planted on the case, and a substantially U-shape or V pivotally supported on the common terminal.
Auxiliary contact piece having a curved portion or a bent portion, a movable contact plate pivotally supported on the upper part of the auxiliary contact piece, and a movable contact plate provided on the movable contact plate and sliding on the movable contact plate. The movable contact plate and the individual terminal are brought into contact with each other, and further slidingly moves the pivotal support portion of the auxiliary contact piece downward to change the contact angle between the movable contact plate and the individual terminal. Switch configured.