JPH0249624Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a minute current switch used for switching signal current in semiconductor equipment and the like.

``Prior Art'' As a switch for a minute current such as a signal current, a leaf switch is known in which a plate material is used as a contact point and the plate material is plated with silver.

``Problems that the invention aims to solve'' Because conventionally used leaf switches are open type, even a small amount of dust adhering to the contacts can cause poor contact, and they are exposed to the air. As a result, the contact parts become oxidized, resulting in poor contact.

Furthermore, since a plate material is used for the contact portion, and this plate material is plated with silver, it has defects such as being susceptible to sulfurization.

The technical problem of the present invention is to use a material with excellent elasticity and to eliminate poor contact at the contact portion.

"Means for Solving the Problem" The configuration of the present invention for solving the above technical problem is as follows.

(A) An operating member and a plurality of contact members are inserted into the switch body with the required spacing in the longitudinal direction, and the upper and lower ends of these members are exposed.

(B) The upper ends of the plurality of contact members are each bent into a substantially inverted L shape to form a contact point, and
A step should be formed between the front and rear horizontal parts of these contacts.

(C) A protrusion that receives the bending of the operating rod is formed at the front in the longitudinal direction of the switch body, and a stopper is formed at the rear.

(D) A recess is formed on the inner surface of the cover body which is fitted over the switch body, and a slit is formed in the front wall through which the operating rod can move up and down within the recess.

(E) The rising of the operating rod of the switch body is suppressed by contacting one of the contacts, and the downward movement of the operating rod is suppressed by the stopper of the switch body.

The object of the present invention is to provide a microcurrent switch characterized by having the above components (A), (B), (C), (D), and (E).

"Operation" The bent part of the actuating rod is bent through a step formed in the front of the switch body, and comes into contact with the lower side of one horizontal part of the inverted L-shaped contact, so that an upward elastic force is constantly applied. When the operating rod is pressed downward, it can come into contact with the upper side of the other horizontal part of the inverted L-shaped contact, and the microcurrent switching function can be fully achieved.

By releasing the pressing force, the actuating rod instantly rises and comes into contact with the upper side of the one horizontal portion.

"Example" An embodiment of the present invention will be described below based on the drawings.

The switch body 10 is injection molded using a plastic material such as heat-resistant resin, and has an operating member 11 with excellent elasticity and two contact members 1 spaced apart from each other in the longitudinal direction of the switch body 10.
The wire terminals 17, 18, 19 of these members protrude to the lower side of the switch body 10, and the operating rod 20 and a substantially inverted L-shape are inserted at the upper side. Contact 2
1 and 22 are formed.

Flat portions 23, 24, 25 are formed at appropriate locations 14, 15, 16 of the above-mentioned members 11, 12, 13 where the wire rods are inserted, as shown by dotted lines in Figure 2, so that the wire rods can be easily moved after insertion. The horizontal portions 26 and 27 of the contacts 21 and 22 plated with precious metal (gold plating) are bent at right angles to the longitudinal direction of the switch body 10. (See FIG. 1) Further, a knob 28 having an appropriate shape such as a circle, an oval, or a square is formed at the tip of the operating rod 20.

29, 29... are locking claw pieces formed protrudingly on both sides of the switch main body 10, and the locking claw pieces 29, 29...
A stepped portion 33 having an inclined surface 32 and a retaining function is formed to be press-fitted into through-holes 31, 31, . . . of a cover main body 30, which will be described later.

Reference numeral 34 denotes a buckling-preventing protrusion formed on the inside of the actuating rod 20 inserted in the front of the switch body 10, and the buckling-preventing protruding portion 34 corresponds to the bending angle of the actuating rod 20 on the outer peripheral surface. Slope 35
is formed.

36 is a stopper formed protruding from the rear of the switch body 10, and the stopper 36 is connected to the operating rod 2.
This shows the lowering limit when the switch is switched to 0.

Reference numeral 37 denotes a mounting hole formed approximately in the center of the switch body 10, and through holes 38, 38 of the same diameter that correspond to the mounting hole 37 are formed in the side walls 39, 3 of the cover body 30.
9, and is attached to an electronic device or the like via a screw (not shown) inserted through the attachment hole 37 and the through hole 38.

40 and 41 are the cover body 3 as shown in FIG.
0, the depressions 40, 41
is the rising size of the contacts 21 and 22, and the limit of the rising size is formed into a substantially V-shaped cross section, making it possible to regulate the contact position.

Reference numeral 42 denotes positioning locking pins formed on both sides of the cover main body 30 substantially at the center.

Reference numeral 43 denotes a slit formed in the front wall of the cover main body 30. The slit 43 is continuous with an opening 44 formed in the lower part, and when the switch main body 10 is fitted, the stopper is inserted into the opening 44. 3
6 is fitted and protrudes, and the operating rod 20 is inserted into the slit 4.
You can go up or down within 3.

``Effect of the invention'' The wire terminal and operating rod are inserted into the ultra-compact switch body, so it never comes off during use, and the wire operating rod has excellent elasticity. The switch is supported by a protective protrusion and is moved up or down between the horizontal parts of the wire contact using the protrusion as a fulcrum, thereby making the switch accurate and smooth.

Moreover, since the terminals of the wire contacts are arranged on the same axis at required intervals, soldering to printed boards of electronic devices and the like is extremely easy and practical.

Further, since the horizontal portion of the wire contact is plated with gold and covered with a cover, the contact portion is covered and oxidized, and poor contact of the changeover switch cannot occur.

Further, overstroke of the operating rod can be prevented by a stopper.

[Brief explanation of drawings]

Figure 1 is a perspective view of the switch body of the microcurrent switch of the present invention, Figure 2 is a front view showing the operating rod and wire contact inserted into the base body, and Figure 3 is a view of the cover body that fits into the switch body. Perspective view,
FIG. 4 is a longitudinal sectional front view of the cover body, and FIG. 5 is a perspective view of the microcurrent switch of the present invention. 10: Switch body, 11: Operating member, 12~
13: Contact member, 17-19: Wire terminal, 2
0: Actuation rod, 38: Through hole.

Claims (1)

[Claims for Utility Model Registration] (1) (A) An actuating member and a plurality of contact members are inserted into the switch body at required intervals in the longitudinal direction, and the upper and lower ends of these members are exposed. (B) The upper ends of the plurality of contact members are each approximately inverted L.
Contacts are formed by bending into a letter shape, and a step is formed between the front and rear horizontal parts of these contacts. (C) A protrusion that receives the bending of the operating rod is formed at the front in the longitudinal direction of the switch body, and a stopper is formed at the rear. (D) A recess is formed on the inner surface of the cover body which is fitted over the switch body, and a slit is formed in the front wall through which the operating rod can move up and down within the recess. (E) The rising of the operating rod of the switch body is suppressed by contacting one of the contacts, and the downward movement of the operating rod is suppressed by the stopper of the switch body. A microcurrent switch characterized by having the above components (A), (B), (C), (D), and (E). (2) Utility Model Registration In the micro-current switch according to claim 1, a locking claw piece is formed on the switch body, and a through hole is formed in the side wall of the cover body to fit the locking claw piece. being formed.