CN1043825C

CN1043825C - Switch unit

Info

Publication number: CN1043825C
Application number: CN96107132A
Authority: CN
Inventors: 我妻透
Original assignee: Alps Electric Co Ltd
Current assignee: Alps Alpine Co Ltd
Priority date: 1995-07-11
Filing date: 1996-07-11
Publication date: 1999-06-23
Anticipated expiration: 2016-07-11
Also published as: CN1143256A; TW295671B; KR100237590B1; KR970008248A

Abstract

The present invention intends to provide a switch device for which a torsion coil spring hating a movable contact part can be automatically fed prevent an unstable operation of the movable contact part at low cost by incorporating the torsion coil spring of a predetermined shape such that a parts feeder can be utilized without the torsion coil springs becoming entangled even when mixed by a large number. A torsion coil spring is incorporated into a wafer that is an asymmetrical one formed by providing two windings that project in the same direction from both ends of a connection which is formed into an approximately U shape having a movable contact part and a driving part, the first winding generating a resilient force for energizing a slider in the rising direction, the second winding being approximately equal in diameter to the first winding with their axes generally aligned.

Description

Switching device

The present invention relates to mainly be used as switching device with the minimal type that is called as mechanically driver type of intrasystem movable link action carrying out switch.

This switching device of the prior art is just like shown in Fig. 5～8.

Switching device before shown in these figure roughly is made of following member, promptly exposes the blade portion 4 that is processed into basket portion 3 inside of under casing shape in mold pressing by the 2nd permanent joint 2 that makes the 1st permanent joint 1 and clip shape, have and to twist helical spring 5 with the 5a of travelling contact portion and usual the turning round of contacting with the 1st permanent joint 1 of 2 clutches of the 2nd permanent joint, can turn round the column slipper 6 that the drive division 5b that twists helical spring 5 is pressed to the inner bottom surface of blade portion 4 to this, be provided with and make this slipper 6 insert the shell 7 that the guide hole 7a that pass through and the upper opening with board 4 that surrounds the guiding walls 7b of this guide hole 7a cover to constitute; Pole plate 4 makes the outside jointing 8,9 of deriving respectively from the 1st and the 2nd

permanent joint

1,2 give prominence to outside in above-mentioned basket portion 3.

And, be to process when making this switching device by the hot-rolled band 10 that is made of good conductive metal plate being carried out metals such as punch process, formation has the bridge formation part of the 1st permanent joint 1 and outside jointing 8 and makes the 2nd permanent joint 2 erect and have the bridge formation part of outside jointing 9, then, this hot-rolled band 10 is delivered to metal pattern, carry out mold pressing processing, form the basket portion 3 that the regulation shape is arranged of supporting and being fixed on this hot-rolled band 10 thus, obtain the pole plate 4 that this basket portion 3 and

various terminal

1,2,8,9 form one.Wherein, the 2nd permanent joint 2 is to open the punch process stipulated of front end strap of part and form by being launched into roughly in the hot-rolled band 10 being " T " word, specifically, after two ends of this strap roughly are bent into " U " font, the drift that punch die is used is configured in the central authorities of this strap and both sides is erected, and forms the permanent joint 2 of clip shape shown in Figure 5 thus.

After forming pole plate 4 like this, in this pole plate 4, be encased on the assigned position that often contacts with the 1st permanent joint 1 turning round stubborn spring 5.This is turned round and twists spring 5, from its end of the 5c of coiling portion extended roughly be " コ " font partly have with slipper 6 contacted above-mentioned drive division 5b and with the above-mentioned movable connection 5a of portion of the 2nd permanent joint 2 clutches; And, anchor portion 5d being set highlightedly at the other end of the 5c of coiling portion, it is to be crimped on the other end that fixedly installs the 5c of coiling portion on the 1st permanent joint 1.And twisting after helical spring 5 is enclosed in the pole plate 4 turning round, under the state that slipper 6 is inserted in the guide hole 7a, shell 7 is configured on the pole plate 4, by pole plate 4 in conjunction with projection 4a snap-button fastening in the 7c of hole at shell 7, from above install to this shell 7 on this pole plate 4 after, just finish assembling procedure.

Like this, in the pole plate 4 of the switching device that assembles, turn round the 5c of coiling portion that twists helical spring 5 and use projection 7d, compressing from the top by pushing of shell 7; With the elastic force that the 5c of this coiling portion produces, drive division 5b often with the press section 6a bullet of slipper 6 upward.And be designed on the shell 7 pushing with projection 7d near formation guiding ditch 7e, by the 5a of movable connection portion that turns round stubborn helical spring 5 is inserted in the choosing guiding ditch 7e loosely, make and follow drive division 5b and the mobile 5a of this movable connection portion can be steady, promptly when drive division 5b reached assigned position, the 5a of movable connection portion can contact with the permanent joint 2 of clip shape really.In addition, on shell 7, also form installing hole 7f, utilize installing hole 7f just can be installed to this switching device above control board etc.

Below, the action of above-mentioned switching device in the past is described simply.

On slipper 6, there is not the push operation masterpiece time spent, as shown in Figure 6, this slipper 6 is turned round the elastic force effect of twisting helical spring 5 and is thus lifted to position, the top (initial position), therefore, turn round the 5a of movable connection portion that twists helical spring 5 and be in the top position that the permanent joint 2 with the clip shape breaks away from, this permanent joint 2 and the 1st permanent joint 1 just do not have conducting, and the loop is held off-state.

Yet, when slipper 6 is pressed into ormal weight downwards, will turns round the drive division 5b that twists helical spring 5 by the press section 6a of this slipper 6 and press to the below, the 5a of movable connection portion is contacted with the connector portions 2a of the permanent joint 2 of clip shape.That is, owing to turn round the 5a of movable connection portion that twists helical spring 5 and be pressed between the 2a of pair of joint portion that the mutual elasticity of the central part of this permanent joint 2 is joined.Thereby, turn round stubborn helical spring 5 by this and make 1,2 conductings of the 1st and the 2nd permanent joint, thereby convert the loop to on-state.After this, when handle is removed the pressing operation power of slipper 6, by turning round the elastic force of twisting helical spring 5 this slipper 6 is risen to the position, the top again, be moved upward with this permanent joint 2 that makes the 5a of movable connection portion break away from the clip shape, thereby make the loop revert to off-state.

Therefore, if above-mentioned switching device is configured near the movable link of system, slipper 6 set for lifting then can detect the position of this movable link along with moving of this movable link, and carry out moving with the switch transition of this movable link interlock.But, this switching device of mechanically driver type that is known as is owing to the movable link that must consider the object in the construction system can be pressed into slipper 6 really, and will make this switching device can not produce bad influence, thereby preferably this switching device is designed to minimal type to the configuration of other members.

Though in above-mentioned prior art, be to be inserted in loosely in the guiding ditch 7a of shell 7 turning round the 5a of movable connection portion that twists helical spring 5, prevent the shakiness of the 5a of this movable connection portion thus, but in the real scheme that proposed in flat 4-76220 number before the another kind of opening of Japanese patent gazette, it is by the leading section of the 5a of movable connection portion roughly is bent into the right angle towards the 5c of coiling portion side, this free end is inserted in loosely in the arcuation guiding ditch that forms between pole plate 4 and the shell 7 and prevents the shakiness of the 5a of movable connection portion.

But, thisly be known as small-sized switching device, in the time can not guaranteeing that slipper 6 has the actuating length of length to a certain degree, can be owing to depart from etc. former with the relative position of above-mentioned movable link thereby have to reduce reliability.Again because under the occasion that actuating length is increased, drive division 5b that turning round in the pole plate 4 twisted helical spring 5 and the amount of movement of the 5a of movable connection portion increase, thereby the 5a of this movable connection portion can not be applied between the connector portions 2a of permanent joint 2 of clip shape, promptly must forethought to when slipper 6 descends, do not make the 5a of this movable connection portion too by this connector portions 2a between and can not return.So,, preferably the connector portions 2a as the 2nd permanent joint 2 is formed the clip shape that prolongs downwards in order to ensure fully long actuating length.As shown in Figure 8, because this permanent joint 2 is by on the base plate 2b that the drift 22 of punch die 23 usefulness is configured in central authorities, make the pressure processing that the both sides of this base plate 2b erect and form, thereby when the size of connector portions 2a is increased, can produce drift 22 that the space is set is confined improper.That is, in order to use the drift 22 that does not have problems of mechanical strength, can not too extend the connector portions 2a of clip shape permanent joint 2, the restriction in this manufacturing process can not fully add actuating length the reason of setting longways before being.

Again because in recent years, strong request makes this switching device slimming, so just attempting doing one's utmost to dwindle the height dimension of pole plate 4, but shown in Fig. 5～7, in the former switching device, the bottom of pole plate 4 is the bottom parts that form basket portion 3 on the inboard of metallic plate that is mother metal with hot-rolled band 10, this bottom parts must have the thickness that can not hinder the mobile the sort of degree of the interior molten resin of metal pattern, therefore, when fully guaranteeing the size of actuating length between metallic plate and the slipper 6, nature can produce restriction to slimming.Promptly, for fear of reduction because of the reliability that causes with deviation of the relative position of above-mentioned movable link etc., must guarantee and slipper 6 corresponding actuating lengths, and the structure of former this switching device is difficult to realize that the sort of actuating length of not sacrificing just can reach desired slimming.

In the switching device of this minimal type, for fear of because of reducing, actuating length is set for when longer with the caused reliability of the deviation of the relative position of above-mentioned movable link, slipper 6 must be shortened.; because the structure of former product all is by with the guiding walls 7b of shell 7 outer peripheral face of slipper 6 being carried out the lifting action that position limit is guided this slipper 6; thereby slipper 6 is being shortened; actuating length is set for when longer; there are these problems to occur; the slipper 6 that promptly is pressed into more deeply tilts easily and causes that action is bad, and the slipper 6 that perhaps excessively is pressed into can come off from shell 7.Collide and connect because slipper 6 is the drive division 5b that twist helical spring 5 that turn round on the assigned position that is assembled into and is configured in the pole plate 4 again, carry out the transmission of actuating force between the two, thereby when lifting action, slipper 6 correctly must be located with respect to pole plate 4, but be easy to generate deviation at the slipper 6 that shell 7 sides are guided with pole plate 4 and the relative position relation of turning round stubborn helical spring 5, therefore the problem that obtains high reliability in distress.

When making the switching device of this minimal type, being operation by hand twists helical spring 5 and is assembled on the assigned position in the pole plate 4 turning round, this is not easy very much, therefore no matter in order to improve productivity, or in order to promote automation, cost is reduced, will consider that all by automatic feeding device this being turned round stubborn helical spring 5 is fed in the pole plate 4 automatically.But in fact, former the turning round of shape shown in Fig. 5～7 twisted helical spring 5 and is unsuitable for supplying with automatically, even with its automatic supply, in automatic feeding device, the fore-end that the 5a of movable connection portion takes place easily is wrapped in other 5c of coiling portion that turn round stubborn helical spring 5 and goes up and difficult problem of throwing off., because same problem takes place easily, thereby also be unsuitable for supplying with automatically towards the 5c of coiling portion side roughly under the occasion of the rectangular another kind of bending with preceding example at the leading section of movable connection 5a.

In the prior art, as mentioned above, shakiness when moving in order to prevent to turn round the 5a of movable connection portion that twists helical spring 5, be this to be turned round in the guiding ditch 7e that near the part 5a of movable connection portion that twists in the helical spring 5 is inserted in shell 7 loosely or the free end of the 5a of movable connection portion is inserted in the arcuation guiding ditch that forms between pole plate 4 and the shell 7 loosely, but, prevent that at these line that in unstable measure any one all must form and turn round the mother metal of twisting helical spring 5 accurately from through about equally narrow guiding ditch, therefore just having the surging naturally problem of metal die expense.And because in practice, it also is difficult wanting such high accuracy to form narrow guiding ditch, thereby along with being easy to generate some shakinesses on the 5a of movable connection portion that turns round the drive division 5b action of twisting helical spring 5, for this reason, former product is that difficult on-position to slipper 6 carries out the high accuracy setting.

The present invention makes for the problem that solves above-mentioned prior art existence, its objective is the connector portions of the permanent joint that a kind of clip shape that can extend is provided, actuating length is not set for with not influencing miniaturization and grown and do not sacrifice the switching device that actuating length just can reach desired slimming.

Even another object of the present invention provides a kind of slipper is shortened and also can avoid moving bad and accident and slipper and pole plate such as come off and the relative position relation difficulty turned round between stubborn helical spring deviates, has the switching device of high reliability.

A further object of the present invention provides a kind of can unhinderedly the supply automatically and has the stubborn helical spring of turning round of movable connection portion, and the switching device of the shakiness can prevent the action of this movable connection portion really, cheaply the time.

The switching device of the present invention of making in order to achieve the above object, it is provided with the 2nd permanent joint that makes the 1st permanent joint and clip shape and exposes pole plate in inside, have and can turn round stubborn helical spring with the movable connection portion of above-mentioned the 2nd permanent joint clutch usual contact with above-mentioned the 1st permanent joint, this turns round the slipper of a stubborn helical spring part to push driving; Be along with the decline of this slipper and rising and make above-mentioned movable connection portion and above-mentioned the 2nd permanent joint clutch, it is that above-mentioned the 2nd permanent joint that the punch process metallic plate is constituted is made eccentric clip shape, promptly make a pair of tear roughly that the front end that curves " U " font part stretches out open and mutually vis-a-vis connector portions and adding dispose man-hour between the base plate of the drift that punch die uses, have in these base plate both sides and erect, and along erecting a pair of rising portions that the direction different directions stretches out with this; Above-mentioned movable connection portion made to be pressed between the above-mentioned pair of joint portion; Just can form the actuating length that obtains desired length with simple method thus and the connector portions of necessary length.

Also with the bottom all-in-one-piece metallic plate of above-mentioned pole plate in the position vis-a-vis, bottom surface with above-mentioned slipper the recess that is processed to form by deep-draw is set, the bottom surface of this recess is exposed externally, thereby, just have and to sacrifice the switching device that actuating length can reach desired slimming by making slipper above this recess, carry out lifting.

The guiding walls of the outer peripheral face of above-mentioned slipper being carried out position limit is set on above-mentioned pole plate,, also can make this slipper run-off the straight or problem of coming off when descending even slipper is shortened for actuating length being set up to long; Also can improve slipper and pole plate and turn round the relative positional accuracy of twisting between helical spring.At this moment, preferably this guiding walls make with above-mentioned slipper in above-mentioned the turning round of pushing twist the tubular that slit is set on the corresponding position, helical spring position.

In addition, above-mentioned turn round that to twist helical spring be to adopt to have and above-mentioned slipper the collide position that connects and above-mentioned movable connection portion, and, the structure that can produce the asymmetric shape that above-mentioned slipper bullet is constituted to the 2nd roughly consistent coiling portion of axis direction roughly identical with this 1st coiling portion with diameter of the 1st coiling portion of the elastic force of ascent direction is set highlightedly in the same direction at the two ends that roughly form the connecting portion of " コ " font; Therefore can unhinderedly in pole plate, supply with automatically by automatic feeding device and turn round stubborn helical spring, even and special guide mechanism is not set, can be that centre of gyration ground carries out circular motion with above-mentioned axis direction also with connecting portion.At this moment, preferably the number of turns of above-mentioned the 2nd coiling portion is set for lacking than above-mentioned the 1st coiling portion.

When above-mentioned the 2nd permanent joint is launched, the part of board and the rising portions formation that can see the bottom also is positioned on the band-like portions of straight line not together, the fore-end of each rising portions is in from the base plate both sides and leaves, and the foliaceous tab that is separated from each other the direction extension on the edge that begins from these fore-ends forms connector portions.Like this, formerly this foliaceous tab is bent into the regulation shape, formation connect to after, drift is configured on the base plate, when by punch die both sides being erected, connector portions can not arrive the top space of base plate opposition side (promptly with) of this drift.So, even utilize the unchallenged big drift of mechanical strength, also can not limit the length of the connector portions of the 2nd permanent joint, just can form with simple method thus and obtain desired actuating length and the connector portions of necessary length.

When pole plate is formed said structure; in the bottom of this pole plate just low than other parts with inner bottom surface position vis-a-vis, slipper bottom surface; its thickness is a plate thickness part; and around above-mentioned recess, can form and have the plastic bottom parts that can not hinder the mobile such thickness of molten resin, so can guarantee that slipper has under the sufficient actuating length situation and make the pole plate slimming.Again because the strength ratio of the above-mentioned recess of metallic plate is not carried out deep-draw processing part height, so can improve the bottom mechanical intensity of pole plate.

As if the guiding walls of the outer peripheral face of slipper being carried out position limit is set as above saidly,, do not have the inclination of this slipper generation when descending or the problem that comes off even then slipper is shortened for actuating length being set for long on pole plate yet; The relative positional accuracy that can also make slipper and pole plate and turn round between stubborn helical spring improves significantly.

If as described above, use free end that the stubborn helical spring of turning round of the 2nd roughly identical with the 1st coiling portion coiling portion of diameter is set at the connecting portion that becomes " コ " font ground to extend from the 1st coiling portion, even being mixed, a plurality of springs do not have the problem of winding yet; Therefore can unhinderedly in pole plate, supply with automatically by automatic feeding device and turn round stubborn helical spring.Again because the axis direction of the 2nd coiling portion and the 1st coiling portion is roughly consistent, thereby when the action that the connecting portion that roughly is " コ " font that movable connection portion arranged is pressed on the slipper or this slipper is improved, the 2nd coiling portion hardly can be unstable, so, even special guide mechanism is not set, also can make this coupling part is that centre of gyration ground carries out circular motion with above-mentioned axis direction, can prevent the decline of the positional precision that the shakiness because of movable connection portion causes.

Fig. 1 is the exploded perspective view of expression present embodiment;

Fig. 2 is the oblique view of the shape of metallic plate before mold pressing processing of the formation pole plate of expression present embodiment;

Fig. 3 is the schematic diagram of manufacturing process of the permanent joint of the clip shape of expression in the present embodiment;

Fig. 4 is the schematic diagram of the lifting action of the slipper in the expression present embodiment;

Fig. 5 is the exploded perspective view with preceding example;

Fig. 6 is the action schematic diagram of expression with the off-state of preceding example;

Fig. 7 is the action schematic diagram of expression with the on-state of preceding example;

Fig. 8 is the schematic diagram of expression with the manufacturing process of the permanent joint of the clip shape in the preceding example.

Below, with reference to Fig. 1～Fig. 4 an embodiment of switching device of the present invention is described.Wherein, Fig. 1 is the exploded perspective view of present embodiment, Fig. 2 is the oblique view of the shape of metallic plate before mold pressing processing of the formation pole plate of expression present embodiment, Fig. 3 is the schematic diagram of manufacturing process of the permanent joint of the clip shape of expression in the present embodiment, and Fig. 4 is the schematic diagram of the lifting action of the slipper in the expression present embodiment.

Switching device shown in these figure roughly is made of following member: promptly exposed at the pole plate 14 of basket portion 13 inside of being processed under casing shape that is molded by the 2nd permanent joint 12 that makes the 1st permanent joint 11 and clip shape; Have and to turn round stubborn helical spring 15 with the 15a of movable connection portion of these the 2nd permanent joint 12 clutches usual contacts with the 1st permanent joint 11; This can be turned round the drive division 15b that twists helical spring 15 and press to the column slipper 16 of the inner bottom surface of pole plate 14; Be provided with the shell 17 that the upper opening with pole plate 14 that makes this slipper 16 insert the guide hole 17a that pass through covers and constitute, pole plate 14 makes the external lug 18,19 of deriving from the 1st and the 2nd permanent joint 11,12 respectively give prominence to basket portion 13 outsides at it.

And when making this switching device, be as shown in Figure 2, carry out punch process by the hot-rolled band 20 that the metallic plate by good conductivity is constituted, formation has the tab portion of the 1st permanent joint 11 and outside connector 18, and make the 2nd permanent joint 12 erect and have the bridge formation part of outside connector 19, then, this hot-rolled band 20 is delivered to the metal pattern that does not have expression among the figure, carry out mold pressing processing, form the basket portion 13 of supporting and being fixed on the regulation shape on this hot-rolled band 20 thus, make and make this basket portion 13 and

various terminal

11,12,18,19 pole plates that become one 14.Wherein, the 2nd permanent joint 12 is made into eccentric clip shape, it is a pair of front end that roughly is bent into " U " font part to be extended and mutually between the base plate 12b of the connector portions 12a that faces toward of elasticity and the drift 22 (with reference to Fig. 3) that the configuration punch die is used when punch process, has to erect in this base plate 12b both sides and along erecting the different a pair of rising portions 12c's that extends obliquely upward of direction with this; As described below, turn round the 15a of movable connection portion that twists helical spring 15 and can be pressed between the 12a of pair of joint portion.

On the bottom of this pole plate 14, the metallic plate that all-in-one-piece with hot-rolled band 20 is mother metal, be goods state ground with the position vis-a-vis, bottom surface of slipper 16 on the recess 21 that is processed to form by deep-draw is set, as seen from Figure 4, the bottom surface of this recess 21 is exposed externally.Also in the basket portion 13 of this pole plate 14, above above-mentioned recess 21, be provided with highlightedly and limiting the tubular guiding walls 13a that slipper 16 outer peripheral face positions are used.On this guiding walls 13a, with slipper 16 in push to drive to be provided with on the corresponding position of press section 16a turn round the drive division 15b that twists helical spring 15 and make the slit 13b of this press section 16a to the outstanding usefulness in side.

After like this forming pole plate 14, with turn round twist helical spring 15 be assembled in this pole plate 14 with the 1st permanent joint 11 usual contacted assigned positions on.This turn round twist helical spring 15 as shown in Figure 1, have the 15a of movable connection portion and drive division 15b, at the two ends that roughly form " コ " font connecting portion 15e, towards equidirectional give prominence to be provided with and can produce the 1st 15c of coiling portion and the diameter of slipper 16 bullets elastic force upward and this 1st coiling 15c of portion is roughly the same, the structure of the asymmetrical shape of the 2nd 15f of coiling portion of axis direction basically identical, the anchor portion 15d that is fixed on crimped status on the 1st permanent joint 11 is being set at the other end of the 1st 15c of coiling portion side-prominently.But this number of turns of turning round the 2nd 15f of coiling portion that twists helical spring 15 is set lacking than the 1st 15c of coiling portion for.

In that being turned round, this twists after helical spring 15 installs on the assigned position in the pole plate 14, the shell 17 that mainly constitutes, under the state that slipper 16 is inserted in the guide hole 17a that leads at it by metallic plate, be configured on the pole plate 14, by tipping this pole plate 14 in this shell 17 fastening in the 17b of hole in conjunction with projection 14a, just this shell 17 can be contained on the pole plate 14, finish assembling procedure thus.

In the pole plate 14 of the switching device that assembles like this, by shell 17 from above compressing the elastic force turning round the 1st 15c of coiling portion that twists helical spring 15, produce by the 15c of this coiling portion, usual by drive division 15b upward the press section 16a bullet of slipper 16.

Below, simple explanation is carried out in the action of above-mentioned switching device.

When not having the push operation masterpiece to be used on the slipper 16, this slipper 16 is turned round the elastic force effect of twisting helical spring 15 and is risen to position, the top (as the solid line position of Fig. 4), thus, turn round the 15a of movable connection portion that twists helical spring 15 and be positioned at the position, top that breaks away from clip shape permanent joint 12, make permanent joint 12 and the 11 not conductings of the 1st permanent joint, the loop is retained off-state.

Yet, when slipper 16 being pressed to the below ormal weight, to turn round the drive division 15b that twists helical spring 15 by the press section 16a of this slipper 16 and be pressed into the below, with this 15a of movable connection portion is pressed between the 12a of pair of joint portion of clip shape permanent joint 12, turn round stubborn helical spring 15 by this and make 11,12 conductings of the 1st and the 2nd permanent joint, make the loop convert on-state to.After this, when handle is removed the push operation power of slipper 16, make this slipper 16 rise to the position, the top again by turning round the elastic force of twisting helical spring 15, make the 15a of movable connection portion be moved upward, make the loop to return into off-state with breaking away from clip shape permanent joint 12 with this.

As mentioned above, in the present embodiment, the permanent joint 12 of eccentric clip shape erectly is being set in the pole plate 14, when this permanent joint 12 is launched, the part that constitutes base plate 12b and rising portions 12c is not to be positioned at jointly on the band-like portions of straight line, the leading section of each rising portions 12c is to be in from the both sides of base plate 12b to leave, and forms the foliaceous tab that extends towards direction separately mutually from these fore-ends.Like this, when constituting connector portions 12a, earlier this foliaceous tab be bent into the regulation shape, after forming connector portions 12a, if drift 22 is configured on the base plate 12b, by punch die (not having expression among the figure) both sides are erected, then connector portions 12 is less than the lining, top (promptly with the opposite space of base plate 12b one side) of this drift 22.Therefore, even the permanent joint 12 of the eccentric clip shape of Xing Chenging has the big drift 22 that use there is not problems of mechanical strength like this, the advantage that the length of connector portions 12a can not be restricted, thus, under the present embodiment occasion, can not produce by the intrasystem movable link that constitutes executive component (not having expression among the figure) relative position deviation and cause that reliability reduces, can form the size connector portions 12a longer than former product, can obtain desired actuating length.

Turning round of being adopted in the present embodiment twist helical spring 15, because since the 1st 15c of coiling portion, the free end side that roughly is the connecting portion 15e that " コ " font extends is being provided with diameter identical the 2nd 15f of coiling portion of the 15c of coiling portion that makes peace greatly, even thereby this is turned round twists more than 15 of helical springs and mix and also do not have the problem of winding, therefore in the assembling process during fabrication, available automatic feeding device unhinderedly is fed in the pole plate 14 automatically turning round stubborn helical spring 15.That is, twist helical spring 15 by using this turning round, owing to the automation can promote manufacturing the time, can improve productivity, obtain more suitable switching device, thereby compared, can reduce cost significantly with former product.

Again because this axis direction of turning round the 2nd 15f of coiling portion that twists helical spring 15 and the 1st 15c of coiling portion is roughly consistent, thereby the connecting portion 15e that roughly is " コ " font with the 15a of movable connection portion on being pressed into slipper 16 or with this slipper 16, promote action the time, the 2nd 15f of coiling portion hardly can be unstable.Therefore, even special guide mechanism not being set, turning round the connecting portion 15e that twists helical spring 15 is to carry out with the circular motion of above-mentioned axis direction as the centre of gyration when action, the decline of the on-position precision that the shakiness because of the 15a of movable connection portion causes can not take place.In other words, because present embodiment is not the expense that it(?) as before must precision forms the product thereby the metal pattern that needn't both expensive of narrow guiding ditch well, can set the on-position of slipper 16 accurately.

Owing to make two 15c of coiling portion, 15f turning round stubborn helical spring 15 give prominence to setting in the same direction, thereby do not have the problem that device is maximized because of setting of the 2nd winding part 15f; Again because the number of turns of the 2nd 15f of coiling portion than the lacking of the 1st 15c of coiling portion, thereby can guarantee that other members are inserted into two spaces between the 15c of coiling portion, the 15f.

Because present embodiment is provided with the tubular guiding walls 13a that the outer peripheral face of slipper 16 is carried out position limit highlightedly in pole plate 14, and again for prevent with system in constitute actuator movable link (not having expression among the figure) departing from of relative position and the reliability that causes reduces and make the actuating length lengthening, even thereby slipper 16 is set for shorter, the problem that when these slipper 16 down maneuvers, does not also tilt or come off.Again since the slipper 16 of guiding walls 13a position limit that is subjected to pole plate 14 when lifting action, can precision determine well and the relative position of 14 on pole plate, thereby be configured in pole plate 14 in assigned position on turn round and twist helical spring 15 and turn round with this that relative position relation of twisting the slipper 16 that helical spring 15 combines is difficult, and deviation takes place, so present embodiment can form switching device small-sized and that reliability is high.

Since present embodiment with the bottom all-in-one-piece metallic plate of pole plate 14 in, at position vis-a-vis, bottom surface recess 21 is set with slipper 16, and the bottom surface of this recess 21 is exposed externally, thereby the inner bottom surface at this position just thickness only is equivalent to the thickness of slab part of metallic plate than other positions are low; And around this recess 21, form thickness and can not cause and touch the plastic bottom parts that resin flows has the obstruction degree molten.Therefore, can prevent with construction system in departing from of relative position of movable link (among the figure do not have expression) of actuator and the reliability that causes reduces, guarantees that slipper 16 has under the occasion of actuating length of length of requirement, present embodiment have can be designed to pole plate 14 than before the thin a lot of advantage of product.Again because in the metallic plate that with hot-rolled band 20 is mother metal, form other part height that the strength ratio of the part of recess 21 is not carried out deep-draw processing, thereby can also the mechanical strength of pole plate 14 bottoms be improved by this recess 21.

As mentioned above, switching device of the present invention, the permanent joint that carries out clutch with movable connection portion wherein uses the structure of eccentric clip shape, promptly a pair of front end that roughly is bent into " U " font part stretch out and mutually the connector portions that faces toward of elasticity and adding dispose man-hour between the base plate of the drift that punch die uses, have and erect in these base plate both sides, and along erecting the structure of a pair of rising portions that the direction different directions stretches out with this, because the permanent joint of this shape is after being configured in drift on the above-mentioned base plate, when both sides being erected by punch die, above-mentioned connector portions is less than the top (promptly with the opposite space of base plate one side) of this drift, thereby promptly use the length that the big drift do not have problems of mechanical strength can limiting joint portion yet, having thus not to influence miniaturization ground, form the excellent results of connector portions of the necessary length of actuating length of desired length easily.

Switching device of the present invention, since with the bottom all-in-one-piece metallic plate of pole plate in the position vis-a-vis, bottom surface with slipper the recess that is made of deep-draw processing is set and this recess is exposed externally, thereby, just have and to sacrifice the effect that actuating length can reach desired slimming by making slipper above this recess, carry out lifting; Again because the strength ratio of the above-mentioned recess of metallic plate was not carried out the height of deep-draw processing part, thereby improve the effect of the mechanical strength of pole plate bottom in addition.

Switching device of the present invention, because the guiding walls of the outer peripheral face of slipper being carried out position limit is set on pole plate, even thereby shorten slipper for actuating length being set for long, can run-off the straight when this slipper down maneuver or problem such as come off yet, and have the effect that can improve slipper and pole plate and turn round the phase time positional precision between stubborn helical spring, the reliability of this switching device is improved greatly.

Switching device of the present invention, what be assembled into that turning round in the pole plate twist that helical spring uses is two ends at the connecting portion that roughly is " コ " font, be provided with highlightedly in the same direction and can producing the structure that the slipper bullet is constituted the regulation shape to the 1st coiling portion of the elastic force of ascent direction with the 2nd roughly identical with this 1st coiling portion coiling portion of diameter, owing to even stubborn a plurality of the mixing of helical spring of turning round of this shape can not twined yet, thereby can unhinderedly be fed in the pole plate with automatic feeding device turning round stubborn helical spring, thus, has the effect that can improve productivity and reduce cost.Again since this turn round twist helical spring be make the 1st roughly consistent with the axis direction of the 2nd coiling portion, thereby guide mechanism need not be set especially, and just to make the above-mentioned connecting portion with movable connection portion be that centre of gyration ground carries out circular motion with this axis direction, and having thus can be really and unstable when preventing the action of this movable connection portion cheaply or with the effect of the decline of its on-position precision that causes.

Claims

1. switching device, it is provided with and makes the 1st permanent joint and clip shape the 2nd permanent joint expose pole plate in inside, have can with the movable connection portion of above-mentioned the 2nd permanent joint clutch usual contact with above-mentioned the 1st permanent joint turn round stubborn helical spring, this turns round the slipper of a stubborn helical spring part to push driving; Be along with the decline of this slipper and rising and make above-mentioned movable connection portion and above-mentioned the 2nd permanent joint clutch, it is characterized in that: above-mentioned the 2nd permanent joint that the punch process metallic plate is constituted is made eccentric clip shape, promptly a pair of front end that will roughly be bent into " U " font part stretch out and mutually vis-a-vis connector portions and adding dispose man-hour between the base plate of the drift that punch die uses, have and erect in these base plate both sides and along erecting a pair of rising portions that the direction different directions stretches out with this; Above-mentioned movable connection portion made to be pressed between the above-mentioned pair of joint portion, just can form the actuating length that obtains desired length with simple method thus and the connector portions of necessary length.

2. switching device, it be provided with the 2nd permanent joint that makes the 1st permanent joint and clip shape expose pole plate in inside, have can with the movable connection portion of above-mentioned the 2nd permanent joint clutch contact with above-mentioned the 1st permanent joint at ordinary times turn round stubborn helical spring, can push and drive this and turn round the slipper of twisting a helical spring part; Be along with the decline of this slipper and rising and make above-mentioned movable connection portion and above-mentioned the 2nd permanent joint clutch, it is characterized in that: with the bottom all-in-one-piece metallic plate of above-mentioned pole plate in the position vis-a-vis, bottom surface with above-mentioned slipper the recess that is processed to form by deep-draw is set and the bottom surface that makes this recess is exposed externally, thereby, just have and to sacrifice the switching device that actuating length can reach desired slimming by making slipper above this recess, carry out lifting.

3. switching device, it is provided with the 2nd permanent joint that makes the 1st permanent joint and clip shape and exposes pole plate in inside, has and can turn round stubborn helical spring, can push and drive this and turn round the slipper of twisting a helical spring part, be provided with the lid that makes the slotting guide hole that leads to of this slipper and the peristome of above-mentioned pole plate is covered with the movable connection portion of above-mentioned the 2nd permanent joint clutch usual contact with above-mentioned the 1st permanent joint; Be along with the decline of above-mentioned slipper and rising and make above-mentioned movable connection portion and above-mentioned the 2nd permanent joint clutch, it is characterized in that: the guiding walls of the outer peripheral face of above-mentioned slipper being carried out position limit is set on above-mentioned pole plate, even slipper is shortened for actuating length being set for long, can not make this slipper run-off the straight or problem of coming off when descending yet, also can improve slipper and pole plate and turn round the relative positional accuracy of twisting between helical spring.

4. switching device as claimed in claim 3 is characterized in that: above-mentioned guiding walls make with above-mentioned slipper in above-mentioned the turning round of pushing twist the tubular that slit is set on the corresponding position, helical spring position.

5. switching device, it be provided with the 2nd permanent joint that makes the 1st permanent joint and clip shape expose pole plate in inside, have can with the movable connection portion of above-mentioned the 2nd permanent joint clutch and also contact with above-mentioned the 1st permanent joint usually turn round stubborn helical spring, this turns round the slipper of a stubborn helical spring part to push driving; Be to make above-mentioned movable connection portion and above-mentioned the 2nd permanent joint clutch, it is characterized in that along with the decline of this slipper and rising: above-mentioned turn round twist helical spring be adopt have with above-mentioned slipper collide the position that connects and above-mentioned movable connection portion, roughly forming the two ends of the connecting portion of " コ " font, be provided with highlightedly and can produce above-mentioned slipper bullet in the same direction to the 1st coiling portion of the elastic force of the ascent direction axis direction roughly identical roughly the 2nd coiling portion of unanimity and the structure of the asymmetric shape that constitutes with this 1st coiling portion with diameter; Therefore can in pole plate, supply with without barrier automatically by automatic feeding device and turn round stubborn helical spring, even and special guide mechanism is not set, can be that centre of gyration ground carries out circular motion with above-mentioned axis direction also with connecting portion.

6. switching device as claimed in claim 5 is characterized in that: the number of turns of above-mentioned the 2nd coiling portion is set for lacking than above-mentioned the 1st coiling portion.