JPS5887715A - Pushbutton 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] This invention provides a method for opening or closing a contact by pushing an operating shaft, which is always urged in the return direction by a return spring, against the urging force. Type 0 - Button switch related to 1.

The e0@0 button switch is like the conventional keyboard~F◆SOI
[Although it is often used in similar products, in the Juqin a#l button switch, the movable contact that opens and opens between the -*etm* contacts is configured in a diaphragm shape. In this case, the shape of the movable contactor itself is complicated, and when manufacturing it, it is difficult to continuously edit it into a round shape that needs to be completed for each individual item. The yield rate of reeds and other materials also decreased, contributing to the price hike. It was. @When placing the constant contact on the pace of the case, place 1. For the wire for the fixed contact element, it is best to make an insertion hole of a slightly smaller diameter in advance. Through this insertion hole, force the wire into the base using a jig and set the tm. Even after the 1w1 constant contact and the wall surface of the insertion hole were fixed, there was always a gap between the wires.
When soldering the terminal part of a fixed contact, 9% of the flux coming out of the solder is 1ilSil.
It is difficult to avoid the intrusion into the case from between I and adhesion of vi*corrosion 1iK to form an insulating film, and this insulating film reduces the reliability of contact with the movable contact. I am very sorry for the situation.

This invention aims to eliminate the drawbacks of the above-mentioned conventional push-button switches. In addition to adopting a coil spring, this
The sprocket l has a function as a movable contact.

Then, the example of ζOII MeiOi Maro is ugly erupted according to diagram W.

In 1■ and 2■, 1 indicates the pace, 2 indicates the cover, and 4.4 is the operating shaft, which is fitted with each other and may damage the box-shaped case 5. When SS is provided with a light emitting diode S for indicating the closed state (1), it is fitted into the cover 2 so as to vibrate freely. and,
A return spring 6 is interposed between the operating shaft 4 and the pace 1.

As is clear from the illustration, the return spring 16 is made of a conductive material and has a coil shape.
A stepped portion 6& is provided in the middle S, and the large diameter portion 1i6b on one end side and the small diameter portion 6• on the other end are continuous with each other by this stepped portion 6&. In addition, the queen large part 6b is small f111I
6.) also reduces the number of places. For example, as shown in FIGS. 5 and 411, the return spring 6 is arranged so that the small diameter part 6 and the large diameter part 61 cross the diameter of the small diameter part 6G in the useful part 6&. It may be constructed in a continuous manner by a guided wire, or alternatively, as shown in FIGS. 5 and 411,
In the stepped portion 6&, the small diameter portion 6& and the large diameter portion 6b may be formed so as to be continuous by a round wire rod extending outward from the small diameter portion 60.

In order to hold the return spring 6 as described above, a spring holding portion 7.8 is formed on the operating shaft 4 and the pace 1, respectively. An annular groove 9 is formed in the groove 9, into which the large diameter end of the return spring 6 is fitted and held. The small diameter end of the return spring 6 is fitted into the hole 1D. Therefore, the operating shaft 4 is always urged in the return direction by the return spring 6.
The accompanying drop in removal is prevented by the mutual engagement of the retaining portions 11 and 12 provided on the operating shaft 4 and the cover 2.

Next, reference numeral 13.14 indicates a pair of linear fixed contacts, whose respective ends are fixed to the pace IK integrally embedded in both ends of the base 10, and fixed to the outside of the pace 10. Toward extension a': 5, that extension WI! The lead is bent at a right angle on the pace 10' side [f1 part and forms 15.1+6 to the connection terminal part, pA.

In the illustrated example, a pair of linear fixed contacts 15.1
4 is disposed on the upper surface of the O-pace 1 in the immediate vicinity of the round hole 10 so as to sandwich it, and in this state, it faces the conductive/electrical wire 1 passing through the return spring 60 stepped M6&.

The pair of linear fixed contacts 13 and 14, the paste 1 and the integral part are continuously formed by insert molding. That is,
When molding paste 1 with resin, two wires are placed in advance at required positions within the metal lid, resin is injected into these, and the resin is cured to mold paste 1. Pace 1 for molding talk
Take it out of the mold and! Cut the ear at the specified location, then wire it.

Connecting terminal 1 by bending the part protruding to the outside of base 1
115.14. In this case, multiple operations
It is also possible to grow at the same time with j connected by two wires.

, the push button switch 17 as described above has its connection terminal portion 1
5.14 is soldered to a printed wiring board etc. not shown,
At this time, the flux OSm emitted from the solder does not enter into the case 3 and form an insulating film on the surface of the linear fixed contacts 13 and 14, thereby reducing the contact reliability.
The linear fixed contacts 13 and 14 are integrally sealed and fixed to the base 1 by the above-mentioned nine inserts S, and the seven I
&lK This is because there is no clear space between the lines.

Also, a spring 140 for returning the Sfw shaft 4 to the inside of the case 3 is installed.
When it is pushed in against ft11, the return sleeve 6 is compressed following the pushing movement fit, and the step ll6h approaches base XIKPjC11, and finally a pair of lines contact the fixed contact 13.14. Therefore, the pair of linear fixed contacts 13 and 14O are short-circuited, and the switch is closed. In such a pushing operation of the operating shaft 4, the return spring 6 is heavy and the small diameter portion 6 with a large number of turns is the contactor 13. ．． There will be sure to be contact at 6 or 4 points across the 14 cabinets. After that, the large diameter part 6
1, the contact pressure between the pair of linear fixed contacts 13 and 14 gradually increases, and the contact reliability is further improved to 9.

Conversely, when the pushing force on the operating shaft 4 is released, the operating shaft 4 returns to its original position due to the biasing force of the return spring 6. Along with this, the return spring 6 itself also expands, and its stepped portion 6& is connected to the pair of linear fixed contacts 13.1.
4 and the switch opens.

In the push button switch 17 that has been moved upward, its return spring 6
As described above, the large diameter part 6b and the small diameter part 6C are continuous with the stepped part 6a, but the present invention is not limited to this. A linear fixed contact 13.1 may be formed with a stepped part such that it protrudes.
4 may be provided in one or more pairs, and these should be appropriately selected as necessary.

As described above, according to the present invention, the return spring of the operating shaft functions as a movable contact in a conventional pushbutton switch, so there is no need to manufacture this movable contact and incorporate it into the case. , the cost is reduced accordingly, and assembly becomes easier. Furthermore, in this invention, the operating shaft and the base are arranged to face each other, and assembly is completed simply by inserting a coil-shaped return spring between the operating shaft and the base. The production of the spout jig itself is extremely easy compared to conventional diaphragm-shaped movable contacts, and it has less orMS 1 degree during use, and its operation is highly reliable, so it is inexpensive and easy to use. A push button switch that operates reliably over a long period of time can be obtained.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional side view showing a push button switch according to an embodiment of the present invention, FIG. 2 is an exploded perspective view thereof, FIG. 5 is a flat #1 view of a return spring, and FIG. 4 is a partially cutaway side view thereof. Fifth
The figure is a plan view showing a modified example of the return spring, and FIG. 6 is a partially cutaway side view thereof. 1...Base, 2-Cover, 6...Case, 4-
... Operating shaft, 6... Return spring, 6a... Stepped part, 6b-- Large diameter part, 60... Small diameter part, 7.8...
・Spring holding part, 1114... linear fixed contact,
14... Linear fixed contact, 15.16... Connection terminal portion. Figure 1 Figure 3 Figure 4 Figure 5 Figure 6

Claims (2)

[Claims] (1) An operating shaft, a case that slidably holds the operating shaft, and at least one pair of linear constant contact elements arranged along the base of the case. A return spring that urges the shaft in its return direction is provided, the operating shaft and the pace are arranged opposite to each other, and the return spring is formed in a coil shape using a conductive wire. 1) The spring is interposed between the operating shaft and the base so that the stepped part faces the pair of linear fixed contacts, and the upper ii. Alternatively, in response to the return movement fwK, the conductive material passing through the upper stepped portion comes into contact with or separates from the pair of fixed contacts. (2) Configure one end side of the return spring and the other m* as a small diameter part and a large diameter part, respectively, and also connect these through a support. , hold one end of this return sprunder ψ and the tin, respectively, on the pace and the operating shaft Kii, and connect the spring II # on the pace with a wire 1 on both sides.
1 electric contact arranged in uneven & O-wrapped shape-5i!
1. The press switch according to claim 1, wherein the push switch is sealed in the body (iii) and the end thereof is extended to the outside of the case to form a connection terminal portion.