CN1118075C

CN1118075C - Press-button switch

Info

Publication number: CN1118075C
Application number: CN98101401A
Authority: CN
Inventors: 高桥一成
Original assignee: Alps Electric Co Ltd
Current assignee: Alps Alpine Co Ltd
Priority date: 1997-04-14
Filing date: 1998-04-14
Publication date: 2003-08-13
Anticipated expiration: 2018-04-14
Also published as: TW434608B; DE69822027T2; EP0872863B1; CN1196563A; EP0872863A3; KR100322772B1; EP0872863A2; KR19980081195A; DE69822027D1; JPH10289631A

Abstract

The present invention provides a small-sized pushbutton switch without causing the plastic deformation of a stem and a movable contact piece, when an excessive pushing force is applied on an operation key and hold the high reliability. A pair of stopper parts 1c are projectingly provided in an upper end part of a housing 1 surrounding an opening. When the operation key 7 is brought in contact with the stopper parts 1c, the operation key 7 pushes the stem 5 by a prescribed quantity to open the switches, and the lowest point of the operation key 7 is regulated by the stopper parts 1c.

Description

Push-button switch

Technical field

The present invention relates to utilize the pocket buttons switch of operation keys pressing operation.

Background technology

The structure of this push-button switch, normally with housing, but but being called as the moving contacting plate of hard contact and being contained on this moving contacting plate, bar that can lifting is as structural detail, a metal frame is installed in this housing and formation again.This housing is provided with fixed contact on the inner bottom surface of opening; And this hard contact is placed in this housing, can or separate with the contact of said fixing contact; The rising of this bar is restricted by the part of above-mentioned opening is covered.

This push-button switch is by utilizing the bottom surface of operation keys, in prescribed stroke, presses the operation jut of above-mentioned bar, but the core that makes the moving contacting plate of round bowl-type produces the sensation of " click clatter " sound, and counter motion, contact with fixed contact, and connect.The relative configuration of pressing operation direction of the operation jut of this bar and operation keys, from the above-mentioned opening of housing, outwards outstanding.In addition, under on-state, when removing the pressing operation power that acts on the operation keys, because but heterodromous moving contacting plate by the elasticity of himself, returns to original round bowl shape, so separate with fixed contact, return back to off-state, this bar rises to primary position simultaneously, but is pressing this moving contacting plate.The primary position of bar stipulates that by contacting with above-mentioned metal frame this metal frame can prevent that this bar from coming off from housing.

Yet, in above-mentioned previous push-button switch, when operation keys being applied excessive pressing operation power, but accept the tip portion distortion of reaction force from the moving contacting plate of bar, become the shape of damaging by pressure, make actuating length not normal, but moving contacting plate produces plastic deformation, can not carry out normal counter motion action, reliability is had bad influence.Past also once proposed (for example), and the front end shape of bar is made cylindrical shape, the way that stress is disperseed.But like this, because significantly the sensation of " click clatter " sound can not pass on the operator's finger, therefore, the sensation of operation degenerates significantly.In addition, but also once considered on bar and moving contacting plate, to use big part, to improve mechanical strength, like this, owing to hindered the miniaturization of push-button switch, also bad.

Summary of the invention

The present invention is provided with a block that descends point most that limits the operation keys of pressing operation on housing, it is highlighted.When such block is set on housing, and when it is highlighted,, but needn't worry that also bar and moving contacting plate can produce plastic deformation even excessive pressing operation power is added on the operation keys, can not hinder the miniaturization of push-button switch, can keep the reliability of height.

But push-button switch of the present invention has a housing moving contacting plate and bar that can lifting.This housing is being provided with fixed contact on the inner bottom surface of opening.But should be placed on this enclosure interior by moving contacting plate, can or separate with the contact of said fixing contact.But the bar that this can lifting is installed on this moving contacting plate, and an operation jut is stretched out in the outside from above-mentioned opening towards above-mentioned housing.By utilizing operation keys, in prescribed stroke, push the aforesaid operations jut of above-mentioned bar, but above-mentioned moving contacting plate is contacted with the said fixing contact.Form stop portion and block in the upper end of above-mentioned housing, this stop portion limits the lifting position of above-mentioned bar, prevents to come off; Thereby this block is by the down position of the down position limit rod of restriction operation keys, and this block can be the lifting action guiding of bar.

The push-button switch of Gou Chenging like this when operation keys contacts with the block of housing, owing to this bar can not be pushed to such an extent that surpass this block, therefore, can be limited to the point that descends most of the operation keys of pressing operation on this block.In addition, make the block be integral with housing, but owing to be with respect to fixed contact in the housing and moving contacting plate, form with the high position precision, therefore, utilize this block, can be on the height and position of pushing this bar neither too much or too littlely, the setting operation key descends point most accurately.

In addition, a part that is installed with on above-mentioned housing its opening covers, the metal frame of the rising of limit rod, make the Outboard Sections of above-mentioned block outstanding with respect to the outer surface of housing sidewall, simultaneously, when fixing with this block Outboard Sections during as the installing hole of the metal frame of clip, this block can have concurrently operation keys descend most point be limited on the block function and as the function of the clip that metal frame is installed.

Description of drawings

Fig. 1 is the plane graph of the push-button switch of one embodiment of the present of invention;

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

The profile of Fig. 3 for being got along the A-A line of Fig. 1;

The profile of Fig. 4 for being got along the B-B line of Fig. 1;

Fig. 5 is the decomposition diagram of the push-button switch of an alternative embodiment of the invention.

Embodiment

Push-button switch shown in these figure mainly by housing 1, but is called the moving contacting plate 4 of hard contact and bar 5 that can lifting constitutes.This housing 1 is provided with fixed contact 2 at it on the inner bottom surface of opening 1a, and has terminal 3 to draw on its side, the part that becomes one.This hard contact is placed on the inside of housing 1, can or separate with fixed contact 2 contacts.But the bar 5 that this can lifting is installed on this moving contacting plate 4, has operation jut 5a to highlight from opening 1a towards the top of housing 1.This push-button switch is relative with the pressing operation direction of operation keys 7 to dispose use.On the upper part that surrounds the above-mentioned housing 1 of opening 1a, each outstanding rising that is provided with a pair of limit rod 5 prevents stop portion 1b and block 1c that it comes off respectively.This block 1c pushes bar 5 when a certain amount of at operation keys 7, contacts with this operation keys 7.Here,, can press on the hope height and position of operation jut 5a of bar 5 neither too much or too littlely, set the apical side height of block 1c accurately in the bottom surface of operation keys 7 in the stage of design housing 1.Promptly, because the most following some apical side height by block 1c of the operation keys 7 of pressing operation limits, when the end face of barre 5 depresses at its most following, but moving contacting plate 4 reliably contacts with fixed contact 2, and the height dimension of block 1c can be made excessive only not little, even feasible end face with bar 5 depresses to minimum point, but needn't worry that also can produce excessive stress on this bar 5 or moving contacting plate 4 concentrates.

Secondly, the action of this push-button switch is described.At Fig. 3, under the off-state shown in 4, when the bottom surface that utilizes operation keys 7, when the operation jut 5a of bar 5 is pushed given stroke, because but the core of the moving contacting plate 4 of circle bowl-type produces the sensation of " click clatter " sound, and counter motion contacts with fixed contact 2, therefore, feel to pass to when just press...withing one's finger the operator of press operation key 7 switch connection when " click clatter " sound.In addition, when under on-state, when removing the pressing operation power that acts on the operation keys 7, but because heterodromous moving contacting plate 4, the elastic recovery that relies on himself is to the circle bowl shape, so separate with fixed contact 2, return back to off-state again, simultaneously, but bar 5 be crushed on the moving contacting plate 4, rise to Fig. 3 and primary position shown in Figure 4.

In addition, when operation keys 7 contacted with the block 1c of housing 1, this push-button switch can not be pressed into bar 5 above block, and therefore, the point that descends most of the operation keys 7 of pressing operation can be limited by this block 1c.Again, because the apical side height of the block 1c that makes with housing 1 integral body, positional precision that can be high, but it is given with respect to fixed contact in the housing 12 and moving contacting plate 4, therefore, as mentioned above, on the height and position of ground neither too much or too little pressing lever 5, can utilize block 1c, setting operation key 7 descends point most accurately.So, when even excessive pressing operation power is added on the operation keys 7, the power that this is excessive, by a pair of block 1c, bear by housing 1, therefore, but needn't worry that this excessive pressing operation power can make bar 5 or moving contacting plate 4 produce plastic deformation, moreover, as seen from Figure 4, owing to block 1c is located on the housing 1, and from the outstanding present embodiment of housing, can make the lifting action of the operation jut 5a of bar 5, with this block 1c guiding, therefore, even under the situation of an end of pressing operation key 7, also can suppress the inclination of bar 5, reliability is improved.

Fig. 5 is the decomposition diagram of the push-button switch of an alternative embodiment of the invention, and the part corresponding with Fig. 1-Fig. 4 is marked with prosign.

Push-button switch shown in Figure 5 is the part that will cover opening 1a, the metal frame 6 of the rising of limit rod 5 is installed in the push-button switch of the sort of form on the housing 1, but omitted the stop portion 1b in the foregoing description, simultaneously, also some is different with the foregoing description for the shape of block 1c.That is, in the present embodiment, the Outboard Sections of block 1c is made sidewall outer surface with respect to housing 1, be the outstanding clip portion 10c of shade shape, the installing hole 6a of metal frame 6 is engaged with this clip portion 10c.Like this, even the bending part size L of this metal frame 6 sets short more much than common structure, this metal frame 6 also can be installed on the housing 1 reliably.In addition, when bending part size L is lacked, when the interval of the bottom surface of the lower end of metal frame 6 and housing 1 is increased,, therefore can prevent the rising of defective insulation and electric flux more reliably because the interval of the loop substrate that this push-button switch is installed and metal frame 6 increases.

According to above-mentioned example, the present invention can produce effect as described below.

But push-button switch of the present invention has housing moving contacting plate and bar that can lifting.This housing is being provided with fixed contact on the bottom surface of opening.But should be placed on this enclosure interior by moving contacting plate, can or separate with the contact of said fixing contact.But the bar that this can lifting is installed on this moving contacting plate, and an operation jut is stretched out in the outside from above-mentioned opening towards above-mentioned housing.By utilizing operation keys, in prescribed stroke, push the aforesaid operations jut of above-mentioned bar, but above-mentioned moving contacting plate is contacted with the said fixing contact.On above-mentioned housing, be provided with the block of giving prominence to towards the aforesaid operations key from the periphery edge of above-mentioned opening.When the aforesaid operations key above-mentioned bar by being pressed in when a certain amount of, above-mentioned block contacts with this operation keys.Utilize this structure, even excessive pressing operation power is applied on the operation keys, but needn't worry that also bar or moving contacting plate can produce plastic deformation, and can not hinder the miniaturization of push-button switch, and can keep height reliability.

In addition, install on above-mentioned housing that a part with opening covers and the metal frame of the rising of limit rod, and the Outboard Sections that makes above-mentioned block highlights with respect to the outer surface of housing sidewall, simultaneously, with this block Outboard Sections during as the installing hole of clip fixing metal frame, can have the function of descending point most that on block, limits operation keys concurrently, and the function of the clip of metal frame is installed in conduct.

Claims

1. push-button switch, but it has a housing moving contacting plate and bar that can lifting; This housing is provided with fixed contact at it on the inner bottom surface of opening; But should be placed on this enclosure interior by moving contacting plate, can or separate with the contact of said fixing contact; But the bar that this can lifting is installed on this moving contacting plate, towards above-mentioned hull outside, has an operation jut to highlight from above-mentioned opening; By using operation keys, in the fixed stroke, push the aforesaid operations jut of above-mentioned bar, but above-mentioned moving contacting plate is contacted with the said fixing contact, it is characterized in that:

Form stop portion and block in the upper end of above-mentioned housing, this stop portion limits the lifting position of above-mentioned bar, prevents to come off; Thereby this block is by the down position of the down position limit rod of restriction operation keys, and this block can be the lifting action guiding of bar.