JP2589914Y2 - switch - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microminiature switch capable of mechanically switching contacts.

[0002]

2. Description of the Related Art As shown in FIG. 5, a movable contact member 8 having one end fixed to a case 1 is indirectly elastically deformed by an operating member 7 elastically deformed by a push button 4 as shown in FIG. There is known a configuration in which contact switching between fixed contacts 9 and 10 is performed.

[0003]

In the switch having the above structure, it is necessary to assemble two small parts of the operating member 7 and the movable contact member 8 made of a spring material into the case 1, and the productivity tends to be low. There are many parts,
There was a tendency to increase costs.

An object of the present invention is to provide a switch having a high assembling workability and a small number of parts.

[0005]

The switch according to the present invention has a V
One end of an elastically deformable movable contact member bent in a letter shape is fixed to the case, and the free end of the movable contact member is slidably contacted with the inner surface of the case. The case is provided with a push button that supports the fixed terminal having the contact portion flush with the inner surface of the sliding case, and presses and displaces the bent portion of the movable contact member toward the inner surface of the case. The free end of the movable contact member slides along the inner surface of the case when the bent portion moves toward and away from the inner surface of the case, and the contact portion of the fixed terminal is moved.
The push button
Has an operating portion acting on the bent portion of the movable contact member.
And the inside of the case is
A guide groove that fits externally to the formed guide rib,
The push button is configured to be displaced along the guide rib.
Done .

[0006]

According to the above construction, for example, as shown in FIG.
When the push button is pushed in to displace the bent portion of the movable contact member toward the inner surface of the case, the free end of the movable contact member slides on the inner surface of the case and comes into contact with the fixed contact portion of the fixed terminal. When the pushing of the push button is released, the movable contact member returns to the original position by the elastic restoring force, and the free end of the movable contact member slides on the inner surface of the case in the opposite direction and separates from the fixed contact portion. Push buttons are located on both sides of the operation unit.
Guide groove is fitted to the guide rib in the case
The push button is rotated (turned)
), And displaces stably.

[0007]

1 to 4 show an embodiment of a switch according to the present invention.

This switch is configured as a microminiature single-function switch having a length (right and left dimensions in the figure) of about 8 mm, a width of about 4 mm, and a vertical thickness of about 4 mm.

The switch case 1 is composed of a box-shaped main case 1a opened upward and a cover case 1b connected to the upper part thereof. A pair of fixed terminals 2 are arranged in parallel at the bottom of the main case 1a. And one movable contact member 3 is connected to the upper surface of the main case 1a.
The push button 4 is mounted on the cover case 1b.

The movable contact member 3 is formed by bending a leaf spring material into a V-shape. One end 3a of the movable contact member 3 is fixed to the upper surface of the main case 1a in a cantilever manner, and the bent portion 3b is formed. The push button 4 is arranged to receive the pushing action. The free end 3c, which is the other end of the movable contact member 3, is formed in a bifurcated shape. It is designed to be contacted and supported.

The fixed terminal 2 has an inner end exposed at the bottom of the case as a fixed contact portion 2a, and the fixed contact portion 2a is disposed flush with the inner surface S of the case. In a normal state in which the push button 4 is not pressed, one fixed contact portion 2a is in contact with one free end portion 3c of the movable contact member 3, and the other fixed contact portion 2a is in the other free end portion. The two fixed contact portions 2a are set so as to be displaced in the direction of displacement of the free end portion 3c so as to be separated from the free end portion 3c.

The push button 4 is constructed by connecting an operating portion 4b to a lower end of a round shaft portion 4a inserted from inside into a boss portion of the cover case 1b, and the operating portion 4b is provided with a movable contact. It straddles the bent portion 3 b of the member 3. A guide groove 6 is provided on both sides of the operation portion 4b so as to be fitted to a guide rib 5 formed in the case, and is supported by the case 1 so that the push button 4 can slide only in the vertical direction without rotating. Have been.

The switch of the present invention is constructed as described above. In a normal state where the push button 4 is not pushed, the fixed contact portions 2a are in a non-conductive state, and the push button 4 is pushed. As shown by the phantom line in FIG. 1, the free end 3c is slid along the inner surface S of the case as the bent portion 3b of the movable contact member 3 is displaced downward, and Fixed contact portion 2 corresponding to end 3c
a, and both fixed contact portions 2a conduct.

When the pushing action of the push button 4 is released, the movable contact member 3 elastically returns to the original posture,
The conduction between the two fixed contact portions 2a is cut off.

In the embodiment, the case where one fixed contact portion 2a is brought into contact with the free end portion 3b in a normal state is shown.
a may be in contact with the free end 3b. Further, although the above-described switch is a normally open type switch, it can be implemented as a normally closed type switch.

[0016]

As is apparent from the above description, according to the present invention, a contact switching mechanism can be constituted by one movable contact member and a pair of fixed terminals, so that the number of parts is smaller than in the prior art. Thus, the assembling workability is high and it can be manufactured at low cost. Also, the push button is formed on the case
Switch along the guide ribs
Is smoothly and reliably performed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a switch according to the present invention.

FIG. 2 is a partially cutaway plan view thereof.

FIG. 3 is a longitudinal sectional side view.

FIG. 4 is an exploded perspective view of a main part.

FIG. 5 is a longitudinal sectional front view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Fixed terminal 2a Contact part 3 Movable contact member 3a One end 3b Bend part 3c Free end part 4 Push button S Case inner surface

Claims (1)

(57) [Scope of request for utility model registration] An end of an elastically deformable movable contact member bent and formed in a V-shape is fixed to a case, and a free end of the movable contact member is slidably brought into contact with an inner surface of the case. The case is equipped with a push button that supports the fixed terminal having the contact portion flush with the inner surface of the case where the free end of the member slides, and presses and displaces the bent portion of the movable contact member toward the inner surface of the case. When the bent portion of the movable contact member moves toward and away from the inner surface of the case, the free end of the movable contact member slides along the inner surface of the case and comes into contact with and separates from the contact portion of the fixed terminal. configured Thea to is,
The push button acts on a bent portion of the movable contact member.
Operation section, and both sides of the operation section have front
Guide groove externally fitted to a guide rib formed in the case
And the push button is changed along the guide rib.
Switch characterized by the following .