JPH0116256Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The invention provides a contact point at the tip of a contact piece made of two conductive strips, and displaces one contact piece in the direction of the other contact piece. The present invention relates to a leaf switch that maintains the distance between both contact pieces at a predetermined size and prevents chattering during operation in a switch that is turned on by bringing both contacts into contact with each other.

[Conventional technology]

In conventional leaf switches of this type, in order to perform the desired opening and closing operations, it is necessary to accurately adjust the distance between the two contact pieces one by one after assembly, and this work is extremely troublesome and takes time and effort. It was something that cost a lot of money. Another drawback was that chattering due to free vibration of the contact piece was likely to occur during operation of the contact piece.

To prevent this chattering, see Figure 5a.
As shown in FIG. 2, a flexible piece 6 made of an insulating material and having a cross section of a square shape is provided between contact pieces 4 and 5 which are supported in parallel by a base 3 made of an insulating material. is attached to one of the contact pieces 4 to damp and absorb vibrations, or the contact pieces 4 and 5 are held in predetermined positions by support parts 7 and 8 formed integrally with the base 3, as shown in FIG. 5b. In addition, it is known that these contact pieces 4 and 5 are bent in a predetermined direction.

Although these chattering prevention means are effective to some extent, the former may cause chattering if the driving force to the movable contact piece 4 is large;
In the latter case, although there is a sufficient effect on chattering, the contact pieces 4 and 5 must be large, making it unsuitable for small switches.

[Purpose of invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a leaf switch that eliminates the above-mentioned drawbacks, prevents chattering, and is easy to assemble and adjust.

[Summary of the idea]

The gist of this invention to achieve the above objectives is as follows:
It consists of two electrically conductive elastic thin strips each having a contact point at its tip, the proximal ends of both contacts are held at a predetermined distance by an insulating material, and the middle part of at least one of the contacts is , when an insulating member having an inclined surface is attached to a part thereof and the contact points of both of the contact pieces are brought close together, the inclined surfaces of the insulating member and the inclined surfaces provided on the corresponding parts of the other elastic strips will slip. This is a leaf switch characterized by making contact.

[Example of idea]

The present invention will be explained in detail based on the embodiments shown in FIGS. 1 to 4.

1 and 2 show a first embodiment of a leaf switch according to the present invention. In FIG. 1, 10 is a movable contact piece made of a metal spring;
Reference numeral 1 denotes fixed contact pieces made of the same material, which are arranged substantially parallel to each other, and whose bases are fixed to a base 12 made of an insulating material made of synthetic resin by, for example, molding. Also, contact piece 1
Contacts 13 and 14 are attached to the inside near the tips of movable contact pieces 1 and 11, respectively.
A plate-like actuator 15 made of an insulating material is attached to the tip of the actuator 0 . A substantially trapezoidal separator 16 made of an insulating material such as synthetic resin is attached to the intermediate portion of the fixed contact piece 11, and the movable contact piece 10 side thereof is an inclined surface 16a.
Actuator 15 corresponding to this inclined surface 16a
An inclined surface 15a is also provided in a part of the actuator, and the inclined surfaces 15a and 16a near their apexes are in contact with each other when the actuator is not in operation. Note that reference numerals 17 and 18 indicate connection ends at the ends of the contact pieces 10 and 11, which are connected to lead wires by soldering or the like.

Due to the contact between the actuator 15 and the separator 16, the movable contact piece 10 and the fixed contact piece 11 are always maintained at an appropriate distance and chattering is also prevented. That is, when a driving member (not shown) such as a magnetic lever applies a driving force to the movable contact piece 10 from above to below in the direction of the arrow shown in FIG. 1 via the actuator 15, the movable contact piece 10 moves. As it moves downward, its inclined surface 1
5a is in sliding contact with the inclined surface 16a of the separator 16, and the contact 13 of the movable contact piece 10 and the contact point 14 of the fixed contact piece 11 come into contact.

When the driving force to the actuator 15 is released, the movable contact piece 10 returns to its original position, but the chattering that tends to occur at this time is caused by vibration energy being absorbed by the sliding contact between the inclined surfaces 15a and 16b. There's nothing to do. Moreover, since both the contact pieces 10 and 11 need only be in constant contact with each other via the separator 16, delicate adjustment of the distance between the both contact pieces 10 and 11 is not necessary.

FIGS. 3 and 4 show a second embodiment, in which the middle part of the movable contact piece 10 is partially bent, and an inclined surface 16b is provided there, and the operation is as shown in FIG. 1. This is similar to the example. In addition, contacts 13 and 14
When they are in contact with each other, the inclined surface 16b of the separator 16 and the inclined surface 16b of the movable contact piece 10 are separated from each other, as shown in FIG.

Furthermore, it goes without saying that the present invention is not limited to the above-described embodiments, but can be modified in various ways.

[Effect of idea]

As explained above, the leaf switch according to the present invention prevents the occurrence of chattering due to the sliding contact made by the inclined surfaces provided on both contact pieces, and eliminates the need for the adjustment process during manufacturing as in the past. , the interval does not change even during use, making it extremely reliable.

[Brief explanation of drawings]

1 to 4 show embodiments of the leaf switch according to the present invention, FIG. 1 is a sectional view of the first embodiment, FIG. 2 is a sectional view during operation, and FIG. 3 is a sectional view of the first embodiment. A sectional view of the second embodiment, FIG. 4 is a sectional view during operation, and FIGS. 5a and 5b are side views showing a conventional chattering prevention mechanism. 10 is a movable contact piece, 11 is a fixed contact piece, 12 is a base, 13 and 14 are contacts, 15 is an actuator, 15a and 15b are inclined surfaces, 16 is a separator, and 16a is an inclined surface.

Claims (1)

[Claims for Utility Model Registration] 1. Consisting of two electrically conductive elastic strip contact pieces each having a contact point at its tip, the base ends of both contact pieces are held at a predetermined distance by an insulating material, An insulating member having a partially sloped surface is attached to the middle part of at least one of the contact pieces, and when the contact points of both the contact pieces are brought close together, the slope of the insulating member and the other elastic strip correspond to each other. A leaf switch characterized in that sloped surfaces provided in the sections make sliding contact with each other. 2. The leaf switch according to claim 1, wherein the inclined surface provided on another contact piece corresponding to the inclined surface of the insulating member is a part of an actuator provided at the tip of the contact piece. . 3. The leaf switch according to claim 1, wherein the inclined surface provided on the other contact piece corresponding to the inclined surface of the insulating member is formed by bending a part of the contact piece.