JPS61218020A - Conducting liquid contact 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] Industrial applications The present invention relates to non-directional conductive liquid contact switches.

2. Description of the Related Art A conventional non-directional conductive liquid contact switch, as shown in FIG. J is located at the bottom /2a of the concave portion of the fixed electrode lλ, the movable element /, a plate installed to cover the movable element /3, and a movable element /
A cylindrical fixed electrode // is provided at a position facing J so that the axis does not pass through the center of the sphere, and the fixed electrode l/
and the leaf spring/l of the mover 73 are wet.

Now, when an external magnetic field is applied, the leaf spring L (not shown) causes the mover /3, which was pressed against the bottom l core a of the recess of the fixed electrode l, to move between the fixed electrode /l and the fixed electrode /2. The movable element /3 overcomes the pressing force of the leaf spring /4' and moves to a position where it contacts the fixed polarization // and the fixed electrode l at the same time, but when the external magnetic field is removed, the movable element /3 Child 1
3 is again caused by the pressing force of the leaf spring.

It is pulled back to the bottom of the recess/crush of the fixed electrode 12. A contact point //a is provided at the portion of the fixed electrode /l facing the movable element /3, and its surface area is so small that when the movable element 13 is released, the bridge of conductive liquid generated between the two can be broken. area is controlled.

Problems to be Solved by the Invention However, in the conventional conductive liquid contact switch,
This method has the disadvantage of requiring a cylindrical fixed electrode with a contact point that is difficult to install.

The present invention has been made in view of the above-mentioned conventional circumstances, and
SUMMARY OF THE INVENTION It is therefore an object of the present invention to eliminate the above-mentioned drawbacks and to provide a non-directional conductive liquid contact switch that is easy to manufacture.

Means for Solving the Problems In order to achieve the above object, a conductive liquid contact switch according to the present invention includes a first fixed electrode having a recess that also serves as a lid of a sealed container; a spherical mover movably disposed within the recess; a plate disposed to cover the mover so that the mover is positioned at the bottom of the recess of the first fixed electrode; , a conductive liquid contact switch having a cylindrical second fixed electrode provided at a position opposite to the movable element so that the axis does not pass through the center of the sphere of the movable element; The part of the plate facing the fixed electrode is processed to prevent it from getting wet with conductive liquid.

Processed and configured.

Principle and operation of the invention The present invention provides a contact point with a special structure that limits the area wetted by the conductive liquid by preventing a portion of the leaf spring facing the first fixed electrode from getting wet with the conductive liquid. The bridge length of the conductive liquid generated between the movable element and the second fixed electrode is controlled without installing a fixed surface electrode.

Embodiment of the Invention Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.

Figure 1 (old) shows an embodiment of the present invention, in which Figure 1 is a sectional view of a conductive liquid contact switch, and Figure 1 is a front view of a plate.

The structure of the leaf spring of the conductive liquid contact switch according to the present invention is completely the same as that of the conventional leaf spring, but around the elongated hole 1Ia through which a part of the mover 3 is exposed (the surface facing the fixed electrode 1). A region b that is not wetted by the conductive liquid is provided in the movable element 3 to limit the bridge length of the conductive liquid generated between the movable element 3 and the fixed electrode. For example, the region +b which cannot be cut by the conductive liquid may be plated with chromium and further oxidized to form chromium oxide. Tungsten, chromium alloys, nickel, iron, etc. can also be used in place of chromium.

Figure 3 shows that when the mover, once closed, is opening,
The conductive liquid bridge structure formed between the movable element and the fixed electrode l) is made of a conventional conductive liquid contact switch, and (A/) is a conductive liquid contact switch constructed according to the present invention. Indicates what this consists of.

In the third drawing, since the entire surface of the leaf spring /4I is wetted with the conductive liquid, K had to provide a special contact //a to limit the bridge length of the conductive liquid, but according to the present invention, In Fig. 3 (A/), there is no special contact point on the fixed electrode /, and even if the entire surface is wet, the trunk of the conductive liquid bridge that occurs on the leaf spring side is limited to the size of the elongated hole 1a. Its length is also limited. Figure 3 (A2)
1 shows a state in which the fixed electrode 1 and the movable element 3 are in contact with each other and the switch is closed in the present invention.

As described in detail about the invention, the conductive liquid contact switch constructed according to the present invention is capable of stable switching operation by limiting the conductive liquid bridge without providing special contacts unlike conventional ones. Not only is manufacturability good, but since the number of welded parts is reduced, it is also effective in improving reliability.

[Brief explanation of the drawing]

In the first garden, (B) is a vertical cross-sectional view showing an embodiment of the conductive liquid contact switch according to the present invention, a front view showing an embodiment of the leaf spring part, Fig. 2(B) is a conventional non-directional switch. A vertical cross-sectional view of the conductive liquid contact switch, a detailed view of the plate spring part, and an enlarged view of the contact part when the conductive liquid is activated, (A/
) and (AJ) show the one according to the present invention, and (B) shows the conventional one. /, //...Fixed electrode, /K...Fixed electrode, /
/a... contact, core a, / roller... recess, 7. /
, 7...Mover, lI, /Q... Leaf spring, 41a,
/! a...long hole, pb...non-wetting area, 3°/j
...outer ring, 6. /6... conductive liquid, 7. Luri...
Internal space (A) (B) Fig. 1 (A) (B) Fig. 2 (A1) (A2) (B) Fig. 3

Claims (1)

[Claims] a first fixed electrode having a recess that also serves as a lid of a sealed container;
a spherical mover movably disposed within the recess of the first fixed electrode; A conductive liquid contact switch has a plate spring installed, and a cylindrical second fixed electrode provided opposite to the movable element so that its axis does not pass through the center of the sphere of the movable element. A conductive liquid contact switch, characterized in that a portion of the leaf spring facing the second fixed electrode is treated to prevent it from getting wet with the conductive liquid.