CN1127928A

CN1127928A - Pushbutton switch

Info

Publication number: CN1127928A
Application number: CN 95108125
Authority: CN
Inventors: 冈田充弘
Original assignee: Alps Electric Co Ltd
Current assignee: Alps Alpine Co Ltd
Priority date: 1994-07-14
Filing date: 1995-07-14
Publication date: 1996-07-31
Anticipated expiration: 2015-07-14
Also published as: CN1036100C; JPH0831254A; JP3128436B2; TW350078B

Abstract

The present invention provides a switching operation even in case that a user presses the periphery of a stem. A round line material having roughly circular cross section is used as the metallic member, and also a mobile contact 12 in the shape of an elastic thin plate is provided between the dome- shaped spring member 11 driven by the stem 7 and the fixed contact 5. By pushing in the stem 7, resisting the spring member 11, the mobile contact 12 contacts with a pair of fixed contacts 5 and performs switching. The mobile contact has freedom, being provided separately from the spring member, so that mobile contact contacts with both a pair of fixed contacts.

Description

Push-button switch

The present invention relates to a kind of pocket buttons switch that is suitable for the herring bone assembling and installs automatically.

In the known technology in this field, push-button switch has a fixed contact that is made of round wire, as the applicant advising among the open 5-325710 of Japan Patent.

Fig. 5 is the cross section view of this push-button switch of expression.This push-button switch comprises an insulation shell 2 that has an opening at its top, and this insulation shell is made by the synthetic resin material; The a pair of fixed contact 5 that the exposed part of round wire 3 constitutes, round wire 3 is inserted in the insulation shell 2 in molded mode, and the inner bottom part that is positioned at insulation shell 2 divides 4; Stretch out insulation shell 2 and the terminals (not shown) that constitutes by the other end of round wire 3; In insulation shell 2 with respect to fixed contact 5 and comprise the arch spring part 6 of a movable contact; One partly 1 that expose from opening, and can be to the post 7 of fixed contact 5 pushing spring parts 6, and lid 8 that the top that is contained in insulation shell 2 comes off to prevent post 7.

In having the push-button switch of this structure, when the operator as shown in Figure 5, when pressing compression leg 7 downwards, have the arch spring part 6 of conductivity to be bent and make it contact with fixed contact 5, realize the closure from the open mode to the closure state thus.Further, when operator under this closure state cancelled the pressure that is applied on the post 7, spring part 6 was owing to its elastic recoil power is got back to its initial condition, and post 7 is pulled to initial position, and spring part 6 from fixed contact 5 is separately got back to off-state thus.In this push-button switch, because of the round wire 3 that is used to form fixed contact 5 or analog can be cut off by relatively little shearing force, the wearing and tearing of cutting off the edge of binding post can be limited, and by using round wire 3, material cost can be lowered.

In above-mentioned known push-button switch, when the operator by direction shown in Fig. 6 arrow 9 during by the circumferential edges of compression leg 7 (it is called as the end and pushes), post 7 is with heeling condition extrusion spring spare 6.Because spring part 6 is extruded on an incline direction, this spring part can not be bent to reservation shape, and the result is that spring part 6 only contacts with one of fixed contact 5, and the closed procedure from the open mode to the closure state is unsettled.

According to this situation of the prior art, the object of the present invention is to provide a kind of push-button switch, even when pressing the circumferential edges of compression leg, also can realize stable closed procedure.

In order to achieve the above object, push-button switch of the present invention comprises the insulation shell that is made by the synthetic resin material, the a pair of fixed contact that constitutes by the exposed part of metal parts, they are inserted in molded mode on the insulation shell inner bottom surface in this insulation shell, stretch out the terminals that this insulation shell constitutes by this metal parts, with the relative movable contact of fixed contact in the insulation shell, and post that the promotion movable contact contacts with described fixed contact, the principal character of this push-button switch be its by round wire with off-round section as described metal parts, one thin, the open and flat plate of rubber-like is used as movable contact, one arch spring part is located between described post and the movable contact, and push this spring part by described post, make this movable contact be pushed and contact, realize closed with fixed contact.

When the operator overcomes the elastic recoil power of arch spring part by pushing described post, because this spring part is bent and oppresses this thin, open and flat movable contact, this movable contact is strain and be pushed and then contact with fixed contact also, realizes the closure from the open mode to the closure state thus.Further, when operator under closure state cancels the pressing force that is applied on this post, this spring part returns to initial condition by the elastic recoil power of himself, like this, this post is pushed gets back to its initial position, and this movable contact also by its elastic recoil power from fixed contact separately recovers open mode.

Further, when the circumferential edges of this post of operator presses, this post of heeling condition in an inclined direction pushes this spring part since this movable contact by and this spring part be provided with respectively and have elasticity, it is with the stable state strain and be pushed into two fixed contacts and contact.Thus, even when pushing the circumferential edges of this post, stable closure also can be implemented.

Referring now to accompanying drawing one embodiment of the present of invention are described.

Fig. 1 is a cross section view according to an embodiment of the invention;

Fig. 2 is the cross section view that this push-button switch is in closure state;

Fig. 3 is a plan view, and it has shown that post, spring part and analog disassemble later state from push-button switch;

Fig. 4 is the figure that the movable contact work in this push-button switch is located in an explanation.In these accompanying drawings, with parts consistent in Fig. 5 and 6 by identical figure denote.Briefly,

numeral

1,2,3,4,5,7 and 8 indicates opening, insulation shell, round wire, inner bottom part, fixed contact and lid respectively.

The push-button switch in this embodiment and the difference of aforementioned conventional push-button switch are, be provided with the arch spring part 11 relative in the insulation shell 2 with fixed contact 5, put into a resilient thin board type movable contact 12 between spring part 11 and fixed contact 5, it is made at phosphor bronze or stainless steel.Other structure is roughly the same.

In Fig. 1 to 3, the insulation shell 2 of this push-button switch makes like this: the cylinder that synthetic resin is molded as end sealing.In the process of mold insulation housing 2, inserted abreast by two round wires 3 that preestablished pressure is processed, the part of stretching out this insulation shell 2 of round wire 3 is crooked and constitute terminals, and useless part is cut, thus, form the terminals of fixed contact 5 and not illustrated from round wire 3.In pressure processing process in advance round wire 3, though do not illustrate, have along the mould of the groove of the direction of extension of round wire 3 and be used to from extruding this round wire 3 down, make round wire 3 be bent thus, only corresponding to the part of fixed contact 5 than other parts highland projection, and protrusion 5a is formed in the bottom of fixed contact 5 by above-mentioned groove.As shown in Figure 3, the result of this pressure processing is, after insulation shell 2 was molded out, fixed contact 5 was exposed among the recessed portion 4a, had with the other parts of the round wire 3 of fixed contact 5 same diameter and be positioned at fixed contact 5 also to expose a bit than other parts of upper/lower positions.

Top at insulation shell 2, the series installation hole 2a that is used for attaching lid 8 is configured as shown in Figure 3, lid 8 passes from the 2a of hole, the inner bottom part 4 of insulation shell 2 constitutes recessed portion 4a, be provided with fixed contact 5 in it, be formed with a step portion 4b in the position that is higher than recessed portion 4a and around recessed portion 4a.Two minor faces of movable contact 12 are placed on this step portion 4b, and the edge of arch spring part 11 is placed on the movable contact 12.Further, two some place projections on the direction that round metal shown in the double dot dash line of step portion 4b in Fig. 33 extends are used for holding and receive two ends of movable contact 12 of rectangular shape.Sidewall at these 2 insulation shells of locating 2 is thinner than other position.Thus, the long limit of movable contact 12 is positioned at and the identical direction of round wire 3 direction of extension, and when post 7 did not move, movable contact 12 was positioned at the position that strides across recessed portion 4a, and separated with fixed contact 5.

In the push switch of aforementioned structure, when operator presses post 7 when overcoming the elastic recoil power of spring part 11, as shown in Figure 2, because spring part 11 is bent and pushes movable contact 12, movable contact 12 is also flexibly crooked and contact with fixed contact 5, realizes the closure from the open mode to the closure state thus.Further, when operator in this closure state cancels the pressing force that is applied on the post 7, spring part 11 returns to initial condition by the elastic recoil power of himself, with spring part 11 correspondingly, post 7 is upwards back into its initial position, movable contact 12 by himself elastic recoil power from fixed contact 5 separately and return to open mode.

Again further, when the circumferential edges of operator presses post 7, be in the post 7 extrusion spring spares 11 of heeling condition because movable contact 12 and spring part 11 be provided with respectively and have elasticity, it contacts with the stable status elastic bending and with two fixed contacts 5.At this moment, as shown in Figure 4, though the power on vertical direction (Z-direction) is with the center of the short side direction (X-direction) that departs from movable contact 12 on the movable contact shown in being applied in, because movable contact 12 is shaped as rectangle, in the rigidity on the short side direction (X-direction) greater than the rigidity on long side direction (Y direction), it is difficult crooked at short side direction (X-direction), and only on long side direction (Y direction), be bent, consequently: movable contact 12 almost is flexibly crooked with the mode quilt of level at square edge direction (X-direction) as previously mentioned, and contacts with two fixed contacts 5.

Therefore, in the above-described embodiments because movable contact 12 at its short side direction with almost level and stable manner by flexibly crooked, and contact with two fixed contacts 5, even press the circumferential edges of compression leg 7, also can realize stable closure.Further, by 5 bottoms of the fixed contact in insulation shell 2 jut 5a is set, the anxious effect of returning (whirl-stop) of backstop can be enhanced.

As mentioned above, according to the present invention, when the circumferential edges of post is pressed, be in the post extrusion spring spare of obliquity.Yet since movable contact and spring part be provided with respectively and have elasticity, it can stably come in contact with two fixed contacts, realizes having stable closure thus, can be provided at the extraordinary push-button switch in operating characteristics aspect.

Fig. 1 is a cross section view according to an embodiment of the invention;

Fig. 3 is a plan view, and it has shown that post, spring part and analog are from the following later state of push-button switch dismounting;

Fig. 4 is the figure that the movable contact work in this push-button switch is located in an explanation;

Fig. 5 is the cross section view that shows a conventional push-button switch;

Fig. 6 is the cross section view of the state that shows that the circumferential edges of the post be located at this push-button switch is pressed.The explanation of used label in the accompanying drawing:

1 opening

2 insulation shells

3 round wires (metal parts)

4 inner bottom parts

The 4a recessed portion

The 4b step portion

5 fixed contacts

7 posts

11 spring parts

12 movable contacts

Claims

1. push-button switch comprises:

The insulation shell that one synthetic resin material is made;

A pair of fixed contact, it is that exposed part by the metal parts of inserting when the molded described insulation shell constitutes, and is positioned on the inner bottom surface of described insulation shell;

Stretch out the terminals that described insulation shell constitutes by the other end of described metal parts;

One in described housing the movable contact relative with described fixed contact; And

One is used to promote the post that described movable contact contacts with described fixed contact;

Wherein, round wire with off-round section is used as described metal parts, a thin rubber-like flat board is used as described movable contact, one arch spring part is between described post and described movable contact, and by pushing described post overcoming the elastic force of described spring part, and make described movable contact be pushed and contact with described fixed contact.

2. push-button switch as claimed in claim 1 wherein is formed with a recessed portion at described insulation shell inner bottom part, and described fixed contact places in the described recessed portion, and described movable contact is positioned at the position of crossing over recessed portion.

3. push-button switch as claimed in claim 1 or 2, wherein said movable contact has rectangular shape, and its long limit is positioned on the direction identical with the direction of extension of described metal parts.