JPS597702Y2 - slide switch - Google Patents

Description

[Detailed description of the invention] The present invention relates to a slide switch, and its purpose is to prevent the movable contact piece from coming into contact with the insulating board on which the fixed terminal is embedded, causing galling, and to ensure easy operation. Our goal is to provide a slide switch that operates smoothly, reliably, and has a long contact life.

Conventionally, as shown in FIGS. 1 and 2, a slider 2 made of plastic or resin is slidably inserted into a switch frame 1 made of a metal plate and having a substantially U-shaped cross section. A clip-shaped movable contact piece 3 housed in a plurality of recesses 2a provided in the abdomen of the slider 2 is brought into sliding contact with a plurality of fixed terminals 5 implanted in an insulating substrate 4 fixed to the frame 1, and the slider 2 There was a slide switch in which each movable contact piece 5 moved and the switch was changed when the movable contact piece 3 was moved, but when the movable contact piece 3 moved, sliding friction with the insulating substrate 4 caused As shown in Fig. 8, the tip corner of the movable contact piece 3 tilts in the recess 2a and damages the insulating substrate 4, as shown in Fig. occurs, and once the galling phenomenon occurs, the sliding friction between the movable contact piece 3 and the insulating substrate 4 becomes even greater, making the operation heavier and the galling phenomenon becoming more severe, causing the movable contact piece 3 to deform. There have been drawbacks such as the insulating substrate 4 being scraped off or broken, and the shavings of the insulating substrate 4 entering the contact contact portion, resulting in poor contact.

The present invention was developed in view of the above points, and the above-mentioned drawbacks were solved by interposing a sliding band made of insulating paper or insulating plastic thin plate between the movable contact piece and the insulating substrate. It is something.

Embodiments of the present invention will be explained below with reference to FIGS. 4 to 8. Parts with the same reference numerals as in FIGS. , hole 1
As shown in FIG.
A plurality of recesses 15 are provided in the abdomen for storing the movable contact piece 3, and the bottom surface of the partition wall 16 between each recess 15 is slightly recessed than the bottom edge 12a of the slider 12, and the four edges A sliding band 18, which will be described later, can be inserted into 12a.

In addition, 17... is an escape groove for escaping the fixed terminal 5.

Reference numeral 18 denotes a sliding band made of, for example, insulating paper and having a small coefficient of friction, and is provided with slits 19 whose width is approximately equal to the thickness of the fixed terminals 5 so that each fixed terminal 5 can escape.

Note that the sliding band 18 may be formed of a thin plastic plate (or film) having a small coefficient of friction and a relatively high temperature resistance.

Then, after storing the movable contact piece 3 in each recess 15, the slider 12 moves to the four edges 1 on the bottom surface of each partition 16.
After inserting the sliding band 18 into the area surrounded by 2a, it is inserted into the frame 1, and each fixed terminal 5 is brought into contact with the corresponding movable contact piece 3 through the slit 19 of the sliding band 18. , a sliding band 1 is provided between each movable contact piece 3 and the insulating substrate 4.
8 intervenes, and the sliding band 18 moves as the slider 12 moves.
That is, it is configured to move together with the movable contact piece 3.

The embodiment switch configured as described above has a slider 1
2, even if the movable contact piece 3 is inclined and its tip corner contacts the sliding band 18, as shown in FIG. Since the slider 12 moves along with the insulating substrate 3, no galling occurs, and since it slides on the surface of the insulating substrate 4, no galling occurs on the insulating substrate 4, and the slider 12 operates lightly.

As mentioned above, the slide switch of the present invention has a sliding band interposed between the movable contact piece and the insulating substrate, so that the galling phenomenon does not occur, the slide switch operates easily, and the operation is smooth and reliable. The movable contact piece will not be deformed or damaged, and the contact failure will not occur, and the opening of the recessed portion of the slider that accommodates the movable contact piece is almost completely closed by the sliding band. Therefore, the entry and exit of outside air is extremely restricted, which significantly suppresses the sulfidation phenomenon of the contacts due to contaminated air, which has the effect of improving practicality and contact life.

[Brief explanation of the drawing]

Figures 1 to 3 are diagrams showing conventional slide switches.
Fig. 1 is a sectional side view of the main part, Fig. 2 is a sectional view taken along the line A-A' in Fig. 1, Fig. 3 A, C, and C are explanatory diagrams of the inclination of the movable contact piece according to the moving direction of the slider, and Fig. ′, 口′, 8′ are illustrations of the galling phenomenon. 4 to 8 are views showing an embodiment of the present invention, in which FIG. 4 is an exploded perspective view, FIG. 5 is a perspective view showing the bottom side of the slider 12, and FIG. 6 is a sectional side view of main parts. Figure 7 is BB' in Figure 6.
The sectional view and FIG. 8 are explanatory diagrams showing the relationship between the movable contact piece and the sliding band. DESCRIPTION OF SYMBOLS 1... Frame body, 3... Movable contact piece, 4... Insulating board,
5... Fixed terminal, 12... Slider, 12 a...
・Edge, 15... Concavity, 16... Partition wall, 18... Sliding band, 19... Slit.

Claims (1)

[Scope of utility model registration request] A slider with a clip-shaped movable contact piece housed in a recess provided in the abdomen is slidably inserted into the switch frame, and the above-mentioned In a slide switch in which a movable contact piece makes sliding contact, a sliding band that moves together with the slider is interposed between the movable contact piece and the insulating substrate so as to cover the recess, and the fixed terminal is connected to the sliding band. A slide switch characterized in that the movable contact piece is brought into contact with the movable contact piece through a slit provided in the slide switch.