CN1161551A

CN1161551A - Push-button switch

Info

Publication number: CN1161551A
Application number: CN 97100314
Authority: CN
Inventors: 高桥一成
Original assignee: Alps Electric Co Ltd
Current assignee: Alps Alpine Co Ltd
Priority date: 1996-01-12
Filing date: 1997-01-10
Publication date: 1997-10-08
Anticipated expiration: 2017-01-10
Also published as: TW384489B; JP3286142B2; CN1047018C; JPH09198961A; KR100231527B1; DE19700667C2; DE19700667A1; KR970060282A

Abstract

A push-button switch includes a first metal plate 1 with a fixed contact 6, a second metal plate 2 with a bowl-shaped movable contact 4 outside the bridge section 7 and a switch housing 3. The switch housing 3 is integrated with the first metal plate 1 and the second metal plate 2, a recess 3a, a plurality of caulking walls 3c formed in an annular form around the recess, and gaps 3d between each adjacent caulking walls are set thereof. The recess 3a is sealed by the movable contact 4 bending in the bridge section 7, the outer side of which is fastened tightly to the caulking walls 3c. Compared with the conventional technology, the elements used and amount of the assemble working procedures are reduced in the present invention.

Description

Push-button switch

The present invention relates to a kind of push-button switch, contact switch for example, in this switch, but bowl-type movable contact spring (metal contact) operate by the pressure of finger, contact with fixed touch plate in the switch enclosure or separate.

As above-mentioned form push-button switch, push-button switch structure shown in Figure 4 is used widely.From Fig. 4 as seen, the push-button switch of prior art is made of following part substantially: the switch enclosure 3 that the end is arranged, in the box insert first metallic plate 1 and second metallic plate 2; But a bowl-type movable contact spring 4, its present position make that the recess space 3a in the switch enclosure 3 is sealed; With a flexible flake 5, it prevents that dust from entering the contact part, but also limits the scope that movable contact spring 4 moves upward simultaneously.First metallic plate 1 plays the fixed touch plate effect, and on wherein a part of protruding inner bottom surface that is exposed to switch enclosure 3 groove 3a, and second metallic plate 2 has a surface to manifest, but the movable contact spring 4 in the switch enclosure 3 just is installed on this surface and contact with it.The end of first metallic plate 1 and second metallic plate 2 then exposes outside the outside wall surface of switch enclosure 3 and (does not demonstrate), plays the terminals effect, so that be connected with the outside circuit.

Push-button switch with this spline structure is installed on the circuit substrate, is placed in an operating body below then.But when depressing movable contact spring 4 with finger or other object, contact with fixed touch plate 6 with flexible flake 5 but this is bent downwardly a certain amount of movable contact spring, thereby make circuit be transformed into on-state from its off-state by operating body.If the pressure of finger is eliminated from the switch that is in on-state, but then movable contact spring 4 is replied its original form under himself elastic reaction, above so just flexible flake 5 being pushed to, and disengaging fixed touch plate 6, thereby make circuit get back to its off-state again.

When above-mentioned prior art push-button switch was assembled, its assembling process should be such, but in the switch enclosure 3 of earlier bowl-type movable contact spring 4 being packed into, place on the ad-hoc location, here, switch enclosure 3 is integral with

metallic plate

1 and 2, then, again flexible flake 5 is installed on the switch enclosure 3.This form push-button switch all is very small-sized, and wherein each size of component also all is little, thus must reduce number of elements and installation procedure quantity, so that reduce its cost.

In addition, in above-mentioned widely used prior art push-button switch, the height of switch enclosure 3 has lowered as much as possible, so that reduce the thickness of switch.In this push-button switch, base plate needs enough thickness, so that can

metallic plate

1 and 2 be installed in this base plate by the insert molding method, in addition, also needs enough spaces in this switch, but so that can be installed into bowl-type movable contact spring 4 above base plate.But if the switch enclosure height has eased down to the degree that can not lower, the thickness of push-button switch also just can not reduce again so.

The structure of push-button switch of the present invention is such, but movable contact spring is to be prepared by the metallic plate that an integral body during with switch enclosure 3 castings is made, its peripheral edge portion connector is on switch enclosure, so just can in structure, save the flexible flake that prior art is provided with, thereby reduce number of elements and installation procedure quantity, and reduce the thickness of push-button switch.

Push-button switch of the present invention is made up of following part: first metallic plate that has fixed touch plate; One second metallic plate, but have a bowl-type movable contact spring in its bridge part outer end; With a switch enclosure, it and insert above-mentioned the first, the second metallic plate wherein is injection-moulded in together, and but above-mentioned movable contact spring is protruded from outside the switch enclosure, switch enclosure is provided with a cavity, and cavity inner bottom surface non-packed described fixed touch plate, and switch enclosure also partly is provided with the caulking wall around it.But movable contact spring folds at the bridge part place, so that make it to cover described cavity, but the movable contact spring outer peripheral portion then securely places described caulking wall.According to said structure, but giving, switch enclosure and movable contact spring make one earlier, so but there is no need to be provided with a separate type movable contact spring, and attach it on the switch enclosure.In addition, but since movable contact spring by caulking wall location and fasten, so but just there is no need to be provided with again a flexible flake and cover movable contact spring, so just can greatly reduce the quantity of number of elements and assembling procedure.

In said structure, around cavity, be provided with a plurality of above-mentioned caulking walls in the form of a ring, and between adjacent caulking wall, also be provided with a gap, the inhomogeneous thickening that may occur when the caulking and usefulness, but so just can make whole movable contact spring almost the periphery consolidation place caulking.So foreign substance, dust for example, but almost nothing may enter the cavity into the capping of movable contact spring institute.

Now in conjunction with the accompanying drawings push-button switch one embodiment of the present invention is described.

Fig. 1 is an embodiment of the invention assembly program schematic diagram;

Fig. 2 is the cutaway view of the foregoing description after assembling;

Fig. 3 is push-button switch state diagram behind the insert molding in manufacture process of the foregoing description;

Fig. 4 is the cutaway view of prior art push-button switch.

In above-mentioned accompanying drawing, indicate with identical reference number with prior art components identical shown in Figure 4.

Fig. 1 C and push-button switch shown in Figure 2 are made like this, but the second metallic plate insert that will have first metallic plate 1 of fixed touch plate 6 and have a bowl-type movable contact spring 4 in the outer end of its bridge part 7 is in a model, inject switch enclosure 3 then together, carry out after more following folding and cut off operation.Switch enclosure 3 is provided with a cavity 3a, and non-packed fixed touch plate 4 on its inner bottom surface, but is provided with a ring-type movable contact spring installed surface 3b around cavity 3a, and is provided with in the form of a ring a plurality of caulking walls along this installed surface 3b.This just means that the switch enclosure 3 of this push-button switch is to be injection-moulded in bridge part 7 partly, but the movable contact spring 4 on second metallic plate 2 then protrudes from outside the switch enclosure 3; After insert molding, but at first movable contact spring 4 is turned back, shown in Figure 1A and 1B, thereby but but make the movable contact spring 4 on the movable contact spring installed surface 3b that is installed in switch enclosure 3 cover cavity 3a at bridge part 7 places.Subsequently, utilize a tapering be 45 ° caulking drift (not shown) with the caulking wall 3c of switch enclosure 3 toward the fastening of its inner circumference side, but thereby but the almost whole outer peripheral portion that will be installed in the movable contact spring 4 on the movable contact spring installed surface 3b securely twist with the fingers in seam, so far, whole assembling procedure is finished.

The switch enclosure 3 of push-button switch also is provided with a gap 3d between adjacent caulking wall 3c, the inhomogeneous thickening of caulking wall 3c that occurs during for the solution caulking is used.In addition, but specific location at movable contact spring installed surface 3b and switch enclosure 3 caulking wall 3c, between also is provided with the mediation groove 3e that uses as air duct, but, and between the inside and outside space of switch, there is not the variation of air pressure although in the cavity 3a that movable contact spring 4 covers, have living space the variation of volume like this.

First metallic plate 1 and second metallic plate 2 are integral with switch enclosure 3, cut away a common circle material 8 and prepare after insert molding, as shown in Figure 3.First metallic plate of using as terminals 1 and the end 9 and 10 of second metallic plate 2 on circuit be the worker mutually independently, expose on the outside wall surface of switch enclosure 3, so that be connected with external circuits.In Fig. 3, chain-dotted line A place is the bending place of bridge part 7.

The push-button switch of above-mentioned structure is mounted on the circuit substrate, and is placed in operating parts (not shown) below.But when press...withing one's finger down movable contact spring 4 by operating parts, but movable contact spring 4 is bent downwardly a specific stroke, thereby contacts with fixed touch plate 6, makes switching circuit convert on-state to from its off-state; When removing finger pressure under on-state, but movable contact spring 4 is returned to reset condition under himself elastic reaction, thereby separates with fixed touch plate 4, and switching circuit is disconnected.

According to present embodiment, push-button switch is preparation like this, carry out insert molding, but the movable contact spring 4 on the part bridge part 7 and second metallic plate 2 is protruded from outside the switch enclosure 3, make movable contact spring 4 cover cavity 3a but bend bridge part 7 then, but the periphery of following movable contact spring 4 place caulking wall 3c.Because but switch enclosure 3 and movable contact spring 4 be integral, thereby not as the push-button switch of prior art, but the movable contact spring of a separation need be established in addition.In addition, but since movable contact spring 4 locate in caulking wall 3c by fastening and fixes, thereby prevent that it is shifted, so there is no need the flexible flake that adopts prior art to adopt always.Consequently, compared with prior art, the number of elements that push-button switch of the present invention adopted greatly reduces, and correspondingly desired assembling procedure quantity also reduces.In addition, owing on whole height, reduced the thickness of flexible flake, promoted the exploitation of thin type push-button switch greatly.

In embodiments of the present invention, switch enclosure 3 is provided with a plurality of caulking wall 3c that are arranged in ring-type around its cavity 3a, and gives between adjacent turns slotted wall 3c and be provided with gap 3d earlier, the inhomogeneous thickening problem that this gap occurs when solving caulking.But since almost the periphery of whole movable contact spring 4 all fastening in the caulking wall, so foreign substance, dust for example, but nothing may enter among the cavity 3a into 4 cappings of movable contact spring, so just can guarantee that contact portion contacts well.

According to present embodiment, switch enclosure 3 is provided with mediation groove 3e at privileged site, even like this when but the inner space volume of the cavity 3a of movable contact spring 4 cappings has any variation, between the inside and outside space of switch air pressure difference can not appear yet, thereby when push switch, but the bending of movable contact spring 4 just can not be subjected to the air pressure difference adverse effect.

In the present embodiment, having adopted tapering is that 45 ° caulking drift carries out caulking to switch enclosure 3 caulking wall 3c, so but can obtain enough caulking power at an easy rate and make movable contact spring 4 fastening securely in the caulking position and do not lose its elasticity.If adopting tapering in above-mentioned push-button switch caulking operation is 30 ° caulking drift, then caulking wall 3c can not fasten to enough degree to its inner circumference, so but the suffered caulking power of movable contact spring 4 is little, and built on the sand.If the employing tapering is 60 ° a caulking drift, caulking wall 3c is detained dramatically to its inner circumference, so but the neighboring of movable contact spring 4 just is subjected to caulking effect exceedingly, but this elasticity to movable contact spring 4 produces detrimental effect, consequently makes push-button switch malfunctioning.

In push-button switch of the present invention, as above-mentioned, but movable contact spring on metallic plate, be shaped, and metallic plate is integral with switch enclosure when injection moulding, in addition, but the outer peripheral portion of movable contact spring is that fastening is in the caulking of switch enclosure.But split type movable contact spring and a flexible flake of available technology adopting have so just been save.So push-button switch of the present invention has a biggest advantage, reduced the quantity of element and the quantity of assembling procedure exactly, and reduced the push-button switch gross thickness.Around the switch enclosure cavity, be provided with a plurality of caulking walls in the form of a ring, fixed touch plate then non-packed on the inner bottom surface of cavity.In addition, between adjacent caulking wall, be provided with the gap, the inhomogeneous thickening problem that may occur during with the solution caulking, with regard to guaranteeing but a reliable caulking effect is arranged along the neighboring of whole movable contact spring like this, thereby minimizing foreign substance, as dust, but enter in the cavity of movable contact spring capping, make the contact site that good contact reliably be arranged.

Claims

1. a push-button switch is made up of following part: first metallic plate that has fixed touch plate; But second metallic plate that has a bowl-type movable contact spring in its bridge part outer end; And switch enclosure, it and insert first metallic plate and second metallic plate wherein is injection molded into one, and but described movable contact spring is protruded outside it, described switch enclosure is provided with the cavity that its inner bottom surface non-packed described fixed touch plate, and along described cavity caulking wall all around, but described movable contact spring in the bending of described bridge part covering described cavity, but the fastening securely of the outer peripheral portion of described movable contact spring is in described caulking wall.

2. according to the described push-button switch of claim 1, it is characterized by around described cavity and be provided with a plurality of arrangements caulking wall in the form of a ring, and between adjacent described caulking wall, be provided with the gap.