JPS62157622A - Leaf switch - 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 [Field of Industrial Application] The present invention relates to a leaf switch used in, for example, video equipment, audio equipment, and other various types of low-power electrical equipment.

[Prior Art] Conventionally, a conventional leaf switch has at least two thin conductive contact pieces fixed almost parallel to a synthetic resin base, and one movable contact piece is driven to connect the other fixed contact piece. Electrical opening/closing is performed by contacting or disconnecting the contact piece, but since this contact part has a dust collection effect based on voltage, dust easily settles, which can cause problems such as poor contact and increased resistance. ing.

In order to prevent such harmful effects, recently, for example,
As seen in Publication No. 0-39517, Publication No. 60-65410, etc., the contact portion is covered with a hard case-like cover that protects and dustproofs the contact portion, and also serves as a drive piece for operating the movable contact piece. It is proposed that.

However, when covering with such a hard cover, the cover must be supported so that it can be rotated quickly according to the movement of the strip contact piece, which makes the structure somewhat complicated and costly. It is also expensive and disadvantageous for downsizing. In addition, since it is difficult to completely seal, the dust-proofing effect is also incomplete, making it unsuitable for waterproof structures.

[Object of the Invention] An object of the present invention is to enable the contact portion to be sealed using a soft cover, and to easily drive the internal strip-shaped contact piece from the outside while the contact portion is sealed. It is an object of the present invention to provide a leaf switch which has elasticity and can easily follow the restoration of a strip-like contact piece.

[Summary of the Invention] The gist of the present invention to achieve the above-mentioned object is to provide a leaf switch in which at least two strip contact pieces are attached substantially parallel to a base made of an insulating material, in which the strip contact pieces are attached from the base to the base. A leaf switch characterized in that the contact portions of the shaped contact pieces are covered with a cover made of a soft insulating material that is easily elastically deformed, and the cover is supported in the drive direction of the cover by an elastic member. .

[Embodiments of the invention] The present invention will be explained in detail based on illustrated embodiments.

1 and 2 show a first embodiment of the present invention, with FIG. 1 showing the normal state and FIG. 2 showing the operating state. A contact point 2a is provided on a base 1 made of an insulating material such as a synthetic resin.
, 3a, that is, the movable contact piece 2 and the fixed contact piece 3 are fixed substantially parallel to each other, as is conventional. Each contact piece 2.3 is supported by a support piece 4.5 extending from the base body 1. A soft cover 6 that is easily elastically deformable covers the other portions of each contact piece 2.3 except for the external connection ends 2b and 3b, that is, from the base body 1 to the contact portion of the contact piece 2.3. This cover 6 is made of electrically insulating synthetic resin or rubber, and is preferably transparent. A tongue-shaped spring member 7 is integrally formed at the bottom of the cover 6, and this spring member 7 comes into contact with an arm 8 extending from the bottom of the base 1 in parallel to the contact piece 2.3. has been done.

Therefore, when the pressing portion 9 of the cover 6 is pressed from the outside by the driving force F to drive the movable contact piece 2 inside, the contacts 2a and 3a of the contact pieces 2.3 are closed. Moreover, if the driving force F is released, the elastic force of the contact piece 2.3 and the cover 6 itself will cause
It is possible to return to the original state as shown in FIG. In this case, especially when the driving force F is applied, since the cover 6 is supported by the spring member 7, it is not bent excessively and can be easily returned to its original state.

In order to fix the cover 6 to the base body 1, it is possible to attach it directly using its elastic force, but various methods such as adhesion to the base body 1, fusion by ultrasonic processing, high frequency processing, heating, etc. method is also possible.

In addition, in the case of FIGS. 1 and 2, the suppressing portion 9 of the cover 6 is made thick, but as shown in FIG.
0 is attached to the movable contact piece 2, a coil spring 11 is used as the mating elastic member, and is interposed between the arm part and the arm part 8.

In the case of FIG. 4, both the movable contact piece 2 and the fixed contact piece 3 are in close contact with the inner surface of the cover 6, and the coil spring 11 is not interposed between it and the arm part 8, but is attached to another fixed member. 12.

Further, in the above embodiment, the contact 2 is used for the purpose of dustproofing and waterproofing.
Although the case where the contacts 2a and 3a are completely sealed with the cover 6 is shown, it is not necessarily necessary to completely seal the contacts 2a and 3a if the only purpose is to prevent dust, and as illustrated in FIG.
An opening 13 of an appropriate shape may be provided near the opening 13 so that the cover 6 can be easily elastically deformed, and the tip 6a of the cover 6 has an arcuate shape to facilitate elastic deformation. . Further, in FIG. 5, the cover 6 is supported by elastically supporting the cover 6 by giving spring properties to the arm portion 8 extending from the base.

The above embodiment shows the case where there are only two contact pieces.
1 only +xx 1 day or discussion 1) 1 Rumor Of course, it will get worse.

[Effects of the Invention] As explained above, in the leaf switch according to the present invention, since the cover that covers the contact portion is made of an elastically deformable soft material, the inner strip-shaped contact piece cannot be driven from the outside of the cover. It is possible to seal the contact area to make it not only dustproof but also waterproof, and it is also structurally simple because there is no need to attach the cover rotatably to the base as in the past. As a result, the cost becomes low and it is advantageous for downsizing. In particular, since the cover is supported by an elastic member, excessive bending of the cover is prevented and restoration is easy.

[Brief explanation of drawings]

The drawings show embodiments of the leaf switch according to the present invention; FIG. 1 is a sectional view in a normal state, 2+rgJ is a sectional view in an operating state, and FIGS. 3 to 5 are sectional views of other embodiments. FIG. 1 is a base body, 2 is a movable contact piece, 3 is a fixed contact piece, 2a, 3
b is a contact point, 6 is a cover, 7 is a spring member, 8 is an arm portion, 11
is a coil spring. Patent applicant: Iizuka Electric Industry Co., Ltd.DrawingsFigure 1Figure 2Figure 4

Claims (1)

[Scope of Claims] 1. A leaf switch in which at least two strip contact pieces are attached substantially parallel to a base made of an insulating material, wherein elasticity extends from the base body to the contact portions of the strip contact pieces. A leaf switch comprising a cover made of a soft insulating material that is easily deformable and supported in the drive direction of the cover by an elastic member. 2. The leaf switch according to claim 1, wherein an arm extends from the base, and the elastic member is interposed between the arm and the cover. 3. Claim 1, wherein an elastic arm extends from the base body, and the cover is supported by the arm.
Leaf switch as described in section.