CN101154524A

CN101154524A - Push-button switch

Info

Publication number: CN101154524A
Application number: CNA2007101409701A
Authority: CN
Inventors: 篠原贤二; 备后英之; 大西春树
Original assignee: Omron Corp
Current assignee: Omron Corp
Priority date: 2006-09-25
Filing date: 2007-08-15
Publication date: 2008-04-02
Also published as: EP1903590A1; TW200828375A; JP2008078090A

Abstract

A push-button switch that excels in durability is provided. A push-button switch includes a base including a common fixed contact point at a middle of a bottom surface of a concave region and arranged with fixed contact points at corners of the concave region, a reverse spring or a movable contact point fitted into the concave region and having an outer peripheral edge contacting the fixed contact points, and a push-button for pushing down the reverse spring. In particular, a wear preventing relay terminal is arranged between the fixed contact points of the base and the reverse spring.

Description

Push-button switch

Technical field

The present invention relates to push-button switch, particularly relate to the good push-button switch of durability.

Background technology

In the past, as push-button switch, for example Fig. 1 of patent documentation 1 was to shown in Figure 4, and it constitutes (with reference to patent documentation 1) by housing 1, travelling contact 5, the driving body 6 with operating portion 7, cover plate 8.

In described push-button switch, operate driving body 6 by push portion 7, thereby press the central portion of travelling contact 5.And when the central portion of travelling contact 5 dropped to assigned position, its central portion reversed and contacts with the fixed contact 4 of the bottom surface that is arranged on housing 1 recess, made fixed contact 4 and fixed contact 3 conductings by described travelling contact 5.

Patent documentation 1:(Japan) spy opens clear 64-7442 communique

Yet in described push-button switch, when pressing the central portion of travelling contact 5 by driving body 6, its peripheral edge portion slides mobile on fixed contact 3., for example implement on the surface of fixed contact 3 when gold-plated, then gold-plated meeting is by shaving for this reason, and contact resistance is increased.In addition, if described fixed contact 3 is a brass, and travelling contact 5 is stainless steel or phosphor-copper, then exists travelling contact 5 by shaving and wearing and tearing easily, thereby lacks the such problem of durability.

Summary of the invention

The present invention proposes in view of described problem, and the push-button switch that provides a kind of durability good is provided its purpose.

Push-button switch of the present invention, in order to solve described problem, it comprises: pedestal has public fixed contact and disposes fixed contact in the bight of described recess in its recess bottom surface central authorities; As the counter-rotating spring of travelling contact, it is entrenched in the described recess and outer peripheral edges portion and described fixed contact join; And button, it presses described counter-rotating spring, wherein, disposes between the fixed contact of described pedestal and described counter-rotating spring and prevents wearing and tearing relaying terminal.

According to the present invention, owing to outer peripheral edges portion slip on prevent to wear and tear with the relaying terminal of counter-rotating spring is moved, so fixed contact is not easy to wear.Particularly, because the counter-rotating spring pressure reduces, frictional force diminishes, thus not easy to wear more, improved durability.

In addition, by the described gauge that prevents to wear and tear with the relaying terminal of suitable change, can change spring performance, thereby can access desired operation sense of touch.

As embodiments of the present invention, also can be described prevent wearing and tearing have toroidal with the relaying terminal.

According to present embodiment, the directivity in the time of can eliminating assembling, and can make the frictional force when contacting become even.

In addition, as another embodiment of the present invention, also can be to implement metal-plated on the described surface of wearing and tearing that prevents with the relaying terminal.

According to present embodiment, has the effect that can obtain the push-button switch that conductivity strengthens, contact reliability is high.

Description of drawings

Fig. 1 is the stereogram of execution mode of the push-button switch of expression the present application;

Fig. 2 is the exploded perspective view of push-button switch shown in Figure 1;

Fig. 3 is the plane graph of pedestal shown in Figure 2;

Fig. 4 (A) and Fig. 4 (B) are preceding A-A line profile and the sectional stereograms of operation of push-button switch shown in Figure 1;

Fig. 5 (A) and Fig. 5 (B) are A-A line profile and the sectional stereograms behind the operation of push-button switch shown in Figure 1;

Fig. 6 is the curve chart that is used for the description operation sense of touch.It is stereogram.

Description of symbols

10 pedestals; 11 recesses; 12 public fixed contacts; 13,14 fixed contacts; 15,16,17 terminals; 20 prevent wearing and tearing relaying ring-type terminal; 21 location teats; 30 counter-rotating springs (travelling contact); 31 location projections; 40 buttons; 41 operation teats; 50 covers.

Embodiment

Execution mode according to the description of drawings push-button switch of the present invention of Fig. 1 to Fig. 6.

As shown in Figures 1 and 2, present embodiment roughly comprises: pedestal 10, prevent to wear and tear with relaying ring-type terminal 20, the counter-rotating spring 30 as travelling contact, button 40, cover 50.

As shown in Figure 3, described pedestal 10 is that square resin forming spare is seen on the plane, give prominence to and be provided with public fixed contact 12 by embedding moulding in the circular depressions 11 bottom surface central authorities that are arranged at its central portion, and described public fixed contact 12 is clipped in the middle and is embedded with fixed

contact

13,14 in described recess 11 bights.Described public fixed contact 12 with below described pedestal 10, drawn and be connected along the

terminal

15,15 that the opposite external side face bends up.On the other hand, described fixed

contact

13,14 with below described pedestal 10, drawn and be connected along the

terminal

16,17 that the opposite external side face bends up.In addition, the bight is formed with location stage portion 18 on described pedestal 10, and on the inner peripheral surface of described recess 11, relative position is respectively arranged with

location notch part

11a, 11b in that described public fixed contact 12 is clipped in the middle.In addition, the relative lateral surface edge portion at described pedestal 10 is formed with fastening claw 10a.

As shown in Figure 2, preventing to wear and tear has the peripheral shape that can be entrenched in described recess 11 and cover described fixed

contact

13,14 with relaying ring-type terminal 20, is provided with a pair of location teat 21 in its outer peripheral edges portion.As the described wearing and tearing relaying ring-type terminal 20 that prevents, preferably for example hardness such as phosphor-copper or stainless steel is big and high conductive material.In addition, described relaying ring-type terminal 20 needs not be ring-shaped continuous, also can be discontinuous circular arc.In addition, circular terminal 20 sections of described relaying need not be flat, and section also can be circular.

Counter-rotating spring 30 is that the electric conducting material of thin circular plate shape is implemented punch process and the moulding of dome-shaped ground, and it works as travelling contact.And described counter-rotating spring 30 has the peripheral shape that can be entrenched in described recess 11, and is provided with a pair of location projection 31 in relative outer peripheral edges portion.

Button 40 has the peripheral shape that can cover above the described pedestal 10, portion is provided with along the vertical direction outstanding operation with teat 41 in the central, and in its lower section the bight outstanding be provided with can with the location of described pedestal 10 with the chimeric teat 42 of stage portion 18.

Cover 50 has the flat shape that can cover described pedestal 10, and portion has embedded hole 51 in the central, and is provided with fastening notch part 53 in bend 52 bights of extending from relative both side edges portion.

Secondly, the push-button switch that is made of described component parts prevents to wear and tear with the projection 31 of the teat 21 and the counter-rotating spring 30 of relaying ring-type terminal 20 in that the notch part 11a, the 11b that are arranged at described pedestal 10 recesses 11 are chimeric respectively, and assembling successively.Then, after locate with the teat 42 of stage portion 18 chimeric buttons 40 location on be arranged at described pedestal 10, cover cover 50, and make operation be fitted to embedded hole 51 with teat 41, the notch part 53 of described cover 50 is fastened on the fastening claw 10a of described pedestal 10, thus, assembling operation finishes.

And, before button 40 operations, shown in Fig. 4 A, counter-rotating spring 30 pushes the operation of button 40 upward with teat 41, the outer peripheral edges portion of counter-rotating spring 30 contacts with

fixed contact

13,14 with relaying ring-type terminal 20 by preventing wearing and tearing, on the other hand, its central portion leaves from public fixed contact 12.

And, when teat 41 is used in the operation of pressing described button 40, the central portion of counter-rotating spring 30 is pressed, when it drops to assigned position, the central portion counter-rotating of counter-rotating spring 30, contact with public fixed contact 12, make described public fixed contact 12 and fixed

contact

13,14 conductings with relaying ring-type terminal 20 and counter-rotating spring 30 by preventing wearing and tearing.

Secondly, when removing the pushing of described button 40, the elastic force that button 40 is inverted spring 30 boosts, and makes the central portion of counter-rotating spring 30 leave from public fixed contact 12, resets into original state.

According to present embodiment, even counter-rotating spring 30 is pressed, its outer peripheral edges portion slides to foreign side and moves, but owing to move on wearing and tearing are with relaying ring-type terminal 20 in hard preventing, and the pressure of counter-rotating spring reduces and frictional force diminishes, so be difficult for producing wearing and tearing.Therefore, can access the push-button switch better than conventional example durability.

In addition, according to present embodiment,, then as shown in Figure 6, can change spring performance if suitably selecting to prevent to wear and tear uses the gauge of relaying ring-type terminal 20.Therefore, has the such advantage of push-button switch that can access the operation sense of touch of expecting to some extent.

Certainly, push-button switch of the present invention is not limited to described execution mode, also goes for other push-button switch.

Claims

1. push-button switch, comprising: pedestal has public fixed contact and disposes fixed contact in the bight of described recess in its recess bottom surface central authorities; As the counter-rotating spring of travelling contact, it is entrenched in the described recess and outer peripheral edges portion and described fixed contact join; And button, it presses described counter-rotating spring, and described push-button switch is characterised in that,

Between the fixed contact of described pedestal and described counter-rotating spring, dispose and prevent wearing and tearing relaying terminal.

2. push-button switch as claimed in claim 1, described push-button switch be characterised in that, describedly prevents that wearing and tearing have toroidal with the relaying terminal.

3. push-button switch as claimed in claim 1 or 2, described push-button switch are characterised in that, implement metal-plated on the described surface of wearing and tearing with the relaying terminal that prevents.