EP0170589B1 - Microswitch - Google Patents
Microswitch Download PDFInfo
- Publication number
- EP0170589B1 EP0170589B1 EP85401490A EP85401490A EP0170589B1 EP 0170589 B1 EP0170589 B1 EP 0170589B1 EP 85401490 A EP85401490 A EP 85401490A EP 85401490 A EP85401490 A EP 85401490A EP 0170589 B1 EP0170589 B1 EP 0170589B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oscillating lever
- base
- compression spring
- insulating base
- contacting element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 230000009975 flexible effect Effects 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 4
- 230000000452 restraining effect Effects 0.000 claims 1
- 230000007246 mechanism Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 241000135309 Processus Species 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/26—Snap-action arrangements depending upon deformation of elastic members
- H01H13/36—Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/0056—Apparatus or processes specially adapted for the manufacture of electric switches comprising a successive blank-stamping, insert-moulding and severing operation
Definitions
- Such a switching device is for example taught in the document U.S.A. 4,130,747.
- the abrupt operation is caused by the elasticity of the conductive blade.
- the arms of the blade are, for this purpose, pre-folded. It is a solution, not only difficult to implement but which, moreover, does not offer much flexibility.
- the present invention aims to overcome these drawbacks.
- the present invention relates to a device of the type defined above, characterized in that the insulating base has on the internal surface supporting the switching mechanism a median projection providing a front face for bearing a compression spring whose thrust axis is disposed in an orientation substantially parallel to the surface of the base supporting the mechanism and included in the plane of the terminals, and the oscillating lever is shaped to contain the compression spring in an internal longitudinal housing and to take a sliding support on the insulating base by its end opposite to that where the compression spring compression means are located by means of a leg passing on each side of the median projection of the base, the oscillating lever containing the expansion of the compression spring.
- the spring a more efficient device is obtained, since it is easier to use a spring with determined characteristics than to conform a blade, with the risk of increasing its fragility. Furthermore, the oscillating lever taking a sliding support on the base, this fulcrum is repelled suitably during operation, so that the trajectory of. contacts carried by the blade is as curved as possible and almost vertical, which relieves the compression spring.
- the microswitch represented in FIG. 1 comprises, in known manner, a mechanism enclosed in an insulating enclosure constituted by a base 1 and a cover 2 covering the whole of the mechanism whose actuation is made possible by the application repetitive of a force exerted on the button 3 guided through the upper wall of the cover 2.
- the middle part of three coplanar conductive drums 4, 5, 6 whose ends which emerge from the base 1, inside the enclosure, are shaped so as to respectively constitute the articulation support and the opposite stops of the fixed contacts on which the movable contacts 70 alternately come to bear.
- the switching blade generally marked 7.
- the latter of generally flat and elongated shape, consists of a thin blade whose composite functional structure is produced by cutting into a single piece in a laminated copper alloy strip having the appropriate electrical and mechanical qualities.
- the commercial alloy of the Berylco 10 brand because of its excellent electrical conductivity as well as its ability to withstand prolonged mechanical and thermal stresses, is particularly suitable for this application.
- the cutting of the blade 7 is carried out so as to determine longitudinally an axial arm 71 relatively wide and rigid as well as a pair of lateral and parallel arms 72 and 73, relatively narrow and flexible, the front ends of which are connected to the end of the axial arm 71 which carries the movable contacts 70 and the rear ends are coupled by the bridge 74 beyond the end of the arm 71 which is opposite the contacts 70 and which is articulated in a rectilinear notch 41 whose section is formed in a V shape in the anterior flank of the conductive barrel 4.
- the transverse bridge 74 coupled by the pair of flexible arms 72 and 73 at the free end of the articulated arm 71 thus plays the role of an oscillating stirrup capable of being moved in a plane that can be angularly moved on either side of the articulation line of the rigid arm 71 in the notch 41.
- the transverse bridge 74 of the stirrup is engaged in a pair of V-shaped notches, in the opposite direction to the notch 41 provided near and opposite the latter on the end of the heel of an oscillating control lever generally marked 8.
- the lever 8 is preferably made of sheet steel stamped in a single piece and consisting of two lateral flanges 81 and 82 extending parallel in opposite direction to the heel to form two legs, each of the ends of which are terminated by rounded feet 83, 84 intended to bear on the upper surface of the base 1, while keeping the freedom to slide on this surface.
- the two lateral flanges 81, 82 of the lever 8 are rigidly coupled by virtue of the transverse spacer 80, the section of which is shaped as a square so that one of its wings is perpendicular to the longitudinal axis of the lever 8.
- the spacer 80 has a surface which is substantially parallel and situated opposite the front posterior face 11 of a boss formed by molding in relief on the middle part of the upper surface of the base 1.
- This arrangement delimits inside and in the longitudinal axis of the lever 8 a housing intended to receive the compression spring 9, preferably helical, each of whose ends comes to bear on the one hand on the front face 11 of the boss in relief on the base 1 and on the other hand on the wing of the spacer 80 which is opposite it in the lever 8.
- the procedure is as follows, with reference to FIG. 3. From a continuous bimetallic strip 20, arranged flat, of ordinary metal and of precious metal, here in Cu and Zn 21, on the one hand, and in Ag 22, on the other hand, the three coplanar conductive drums 4, 5, 6 are first cut, allowing the silver strip (Ag) 23 to be recovered. the insulating base 1, by overmolding of plastic material. Then, the lever 8, the spring 9, the blade 7, the button 3 and the cover are mounted. It then only remains to proceed with the final separation of the device from the strip 20.
- the production of the device from the The invention is therefore carried out by progressive cutting which, in addition to the precision of production, allows the recovery of the superfluous part of precious metal (Ag) lining the contact areas of the terminals, moreover made of ordinary metal (Cu, Zn).
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Switches (AREA)
Description
La présente invention concerne un dispositif électromécanique de commutation à commande sensible du positionnement brusque d'un élément contacteur mobile entre des butées de contact fixes, ce dispositif comprenant :
- - un socle isolant dans lequel sont implantées trois bornes conductrices coplanaires,
- - un levier oscillant de renvoi de la force de commande et d'actionnement de l'élément contacteur mobile,
- - une lame conductrice de structure composite réalisée en une seule pièce comportant un bras axial rigide articulé sur une borne d'extrémité du dispositif pour former l'élément contacteur mobile ainsi que deux bras latéraux flexibles fixés à l'extrémité libre du bras axial rigide et accouplés au delà de l'articulation de ce dernier pour former un étrier sur lequel s'applique la traction du levier oscillant.
- - an insulating base in which three coplanar conductive terminals are installed,
- - an oscillating lever for returning the control and actuating force of the movable contactor element,
- a conductive strip of composite structure produced in a single piece comprising a rigid axial arm articulated on an end terminal of the device to form the movable contactor element as well as two flexible lateral arms fixed to the free end of the rigid axial arm and coupled beyond the articulation of the latter to form a stirrup on which the traction of the oscillating lever is applied.
Un tel dispositif de commutation est par exemple enseigné par le document U.S.A. 4 130 747.Such a switching device is for example taught in the document U.S.A. 4,130,747.
Ce type de dispositif, dont la réalisation est très largement répandue et dont une grande variété de mécanismes a été proposée, permet d'obtenir le changement de position quasi instantané d'un élément contacteur mobile entre des butées de contact fixes à partir du mouvement relativement- lent d'un organe de commande agissant de manière réversible sur des moyens propres à déterminer une détente élastique.This type of device, the realization of which is very widespread and of which a wide variety of mechanisms has been proposed, makes it possible to obtain the almost instantaneous change of position of a movable contactor element between fixed contact stops from relatively moving - slow of a control member acting reversibly on means suitable for determining an elastic relaxation.
Dans un tel dispositif, le fonctionnement brusque est provoqué par l'élasticité de la lame conductrice. Dans le cas évoqué de l'art antérieur, les bras de la lame sont, à cet effet, prépliés. Il s'agit d'une solution, non seulement délicate à mettre en oeuvre mais qui, en outre, n'offre pas beaucoup de souplesse.In such a device, the abrupt operation is caused by the elasticity of the conductive blade. In the case mentioned in the prior art, the arms of the blade are, for this purpose, pre-folded. It is a solution, not only difficult to implement but which, moreover, does not offer much flexibility.
La présente invention vise à pallier ces inconvénients.The present invention aims to overcome these drawbacks.
A cet effet, la présente invention concerne un dispositif du type défini ci-dessus, caractérisé par le fait que le socle isolant présente sur la surface interne supportant le mécanisme de commutation une saillie médiane offrant une face frontale d'appui à un ressort de compression dont l'axe de poussée est disposé selon une orientation sensiblement parallèle à la surface du socle supportant le mécanisme et comprise dans le plan des bornes, et que le levier oscillant est conformé pour contenir le ressort de compression dans un logement longitudinal interne et pour prendre un appui glissant sur le socle isolant par son extrémité opposée à celle où sont situés les moyens de contention du ressort de compression grâce à un jambage passant de chaque côté de la saillie médiane du socle, le levier oscillant contenant la détente du ressort de compression.To this end, the present invention relates to a device of the type defined above, characterized in that the insulating base has on the internal surface supporting the switching mechanism a median projection providing a front face for bearing a compression spring whose thrust axis is disposed in an orientation substantially parallel to the surface of the base supporting the mechanism and included in the plane of the terminals, and the oscillating lever is shaped to contain the compression spring in an internal longitudinal housing and to take a sliding support on the insulating base by its end opposite to that where the compression spring compression means are located by means of a leg passing on each side of the median projection of the base, the oscillating lever containing the expansion of the compression spring.
Grâce au ressort, on obtient un dispositif plus performant, car il est plus facile d'utiliser un ressort à caractéristiques déterminées que de conformer une lame, avec le risque d'augmenter sa fragilité. Par ailleurs, le levier oscillant prenant un appui glissant sur le socle, ce point d'appui est repoussé convenablement au cours du fonctionnement, si bien que la trajectoire des. contacts portés par la lame est la moins courbe possible et presque verticale, ce qui soulage le ressort de compression.Thanks to the spring, a more efficient device is obtained, since it is easier to use a spring with determined characteristics than to conform a blade, with the risk of increasing its fragility. Furthermore, the oscillating lever taking a sliding support on the base, this fulcrum is repelled suitably during operation, so that the trajectory of. contacts carried by the blade is as curved as possible and almost vertical, which relieves the compression spring.
Les diverses caractéristiques et avantages de l'invention ressortiront plus clairement de la description détaillée qui suit d'un exemple de réalisation donné en référence aux dessins annexés sur lesquels. :
- - la figure 1 représente, en élévation, l'agencement constructif de l'ensemble du mécanisme de microrupteur selon l'invention, la partie antérieure du capot protecteur coiffant le mécanisme monté sur son socle isolant étant supposé soulevé,
- - la figure 2 représente schématiquement et en perspective partielle la structure et l'agencement de certains éléments constructifs du microrupteur de la figure 1, et
- - la figure 3 illustre, selon un processus schématique. les différentes étapes de la fabrication du microrupteur des figures 1 et 2.
- FIG. 1 represents, in elevation, the constructive arrangement of the assembly of the microswitch mechanism according to the invention, the front part of the protective cover covering the mechanism mounted on its insulating base being assumed to be raised,
- FIG. 2 shows schematically and in partial perspective the structure and arrangement of certain constructive elements of the microswitch of FIG. 1, and
- - Figure 3 illustrates, according to a schematic process. the different stages of the fabrication of the microswitch of FIGS. 1 and 2.
Le microrupteur représenté sur la figure 1, comporte, de manière connue, un mécanisme enferme dans une enceinte isolante constituée d'un socle 1 et d'un capot 2 recouvrant l'ensemble du mécanisme dont l'actionnement est rendu possible par l'application répétitive d'une force exercée sur le bouton 3 guidé à travers la paroi supérieure du capot 2. Dans la masse isolante du socle 1 est emprisonnée par moulage d'une matière plastique appropriée la partie médiane de trois fûts conducteurs coplanaires 4, 5, 6 dont les extrémités qui émergent du socle 1, à l'intérieur de l'enceinte, sont conformées de façon à constituer respectivement le support d'articulation et les butées opposées des contacts fixes sur lesquels viennent s'appuyer alternativement les contacts mobiles 70 dont est pourvue la lame de commutation généralement repérée 7. Cette dernière, de forme généralement plane et allongée, est constituée d'une lame mince dont la structure fonctionnelle composite est réalisée par découpage en une seule pièce dans un ruban d'alliage cuivreux laminé présentant les qualités électriques et mécaniques appropriées.The microswitch represented in FIG. 1, comprises, in known manner, a mechanism enclosed in an insulating enclosure constituted by a
A titre indicatif l'alliage commercial de la marque Berylco 10, du fait de son excellente conductibilité électrique ainsi que de son aptitude à supporter les contraintes mécaniques et thermiques prolongées, convient particulièrement bien à cette application. Ainsi qu'on peut le voir en perspective sur la figure 2, le découpage de la lame 7 est réalisé de façon à déterminer longitudinalement un bras axial 71 relativement large et rigide ainsi qu'une paire de bras latéraux et parallèles 72 et 73, relativement étroits et flexibles dont les extrémités antérieures sont reliées à l'extrémité du bras axial 71 qui porte les contacts mobiles 70 et les extrémités postérieures sont accouplées par le pont 74 au delà de l'extrémité du bras 71 qui est opposée aux contacts 70 et qui vient s'articuler dans une encoche rectiligne 41 dont la section est ménagée en forme de V dans le flanc antérieur du fût conducteur 4. Le pont transversal 74 attelé grâce à la paire de bras flexibles 72 et 73 à l'extrémité libre du bras articulé 71 joue ainsi le rôle d'un étrier oscillant capable d'être mu dans un plan déplaçable angu- lairement de part et d'autre de la ligne d'articulation du bras rigide 71 dans l'encoche 41. Afin de provoquer ce mouvement, le pont transversal 74 de l'étrier est engagé dans une paire d'encoches en V, de sens opposé à l'encoche 41 ménagées à proximité et en regard de cette dernière sur l'extrémité du talon d'un levier de commande oscillant généralement repéré 8.As an indication, the commercial alloy of the Berylco 10 brand, because of its excellent electrical conductivity as well as its ability to withstand prolonged mechanical and thermal stresses, is particularly suitable for this application. As can be seen in perspective in FIG. 2, the cutting of the
Le levier 8 est réalisé de préférence en tôle d'acier emboutie en une seule pièce et constitué de deux flasques latéraux 81 et 82 se prolongeant parallèlement en direction opposée au talon pour former deux jambes dont chacune des extrémités sont terminées par des pieds arrondie 83, 84 destinés à prendre appui sur la surface supérieure du socle 1, en gardant la liberté de glisser sur cette surface.The
Les deux flasques latéraux 81, 82 du levier 8 sont rigidement accouplés grâce à l'entretoise transversale 80 dont la section est conformée en équerre de façon à ce qu'une de ses ailes soit perpendiculaire à l'axe longitudinal du levier 8.The two
Ainsi, l'entretoise 80 présente une surface qui est sensiblement parallèle et située en regard de la face postérieure frontale 11 d'un bossage ménagé par moulage en relief sur la partie médiane de la surface supérieure du socle 1.Thus, the
Cet agencement délimite à l'intérieur et dans l'axe longitudinal du levier 8 un logement destiné à recevoir le ressort de compression 9, de préférence hélicoïdal, dont chacune des extrémités vient prendre appui d'une part sur la face frontale 11 du bossage en relief sur le socle 1 et d'autre part sur l'aile de l'entretoise 80 qui lui est opposée dans le levier 8.This arrangement delimits inside and in the longitudinal axis of the lever 8 a housing intended to receive the compression spring 9, preferably helical, each of whose ends comes to bear on the one hand on the front face 11 of the boss in relief on the
Pour la réalisation du microrupteur de l'invention, on procède de la manière suivante, en référence à la figure 3. A partir d'une bande continue bimétallique 20, disposée à plat, en métal ordinaire et en métal précieux, ici en Cu et Zn 21, d'une part, et en Ag 22, d'autre part, on découpe d'abord les trois futs conducteurs coplanaires 4, 5, 6, permettant de récupérer la bandelette d'argent (Ag) 23. On enfile ensuite le socle isolant 1, par surmoulage de matière plastique. Puis, on monte le levier 8, le ressort 9, la lame 7, le bouton 3 et le capot 2. Il ne reste plus ensuite qu'à procéder à la séparation finale du dispositif de la bande 20. La réalisation du dispositif de l'invention s'effectue donc par découpage progressif qui, permet, outre la précision de réalisation, la récupération de la partie superflue de métal précieux (Ag) garnissant les zones de contact des bornes par ailleurs en métal ordinaire (Cu, Zn).For the realization of the microswitch of the invention, the procedure is as follows, with reference to FIG. 3. From a continuous
Claims (1)
- Electromechanical switching device with a responsive control of the snap positioning of a mobile contacting element (7) between fixed contact stops (5, 6), such device comprising :- an insulating base (1) in which three coplanar conducting terminals (4, 5, 6) are provided,- an oscillating lever (8) for countering the force for controlling and actuating the mobile contacting element (7),- a conducting blade (7) having a composite structure and made of a single piece comprising a rigid axial arm (71) pivotably mounted at an end terminal (4) of the device to form the mobile contacting element as well as two flexible lateral arms (72, 73) secured to the free end of the rigid axial arm (71) and interconnected beyond the pivot of the latter (71) to form a stirrup (74) onto which the pulling of the oscillating lever (8) is applied, device characterized in that the insulating base (1) is provided on the internal surface mounting the switching mecanism with a median projection having a front bearing surface (11) for a compression spring (9) whose thrust axis is disposed along an orientation substantially parallel to the surface of the base mounting the mecanism and comprised in the plan of the terminals, and in that the oscillating lever (8) is formed so as to hold the compression spring (9) within an internal longitudinal recess and to slidingly bear on the insulating base with its end (83, 84), opposed to that one where the compression spring (9) holding means (80) are located, thanks to leg means (81, 82) extending on each side of the median projection (11) of the base (1), the oscillating lever (8) restraining the expansion of the comcression spring (9).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8411766 | 1984-07-23 | ||
| FR8411766A FR2568054B1 (en) | 1984-07-23 | 1984-07-23 | SUBMINIATURE MICROSWITCH |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0170589A1 EP0170589A1 (en) | 1986-02-05 |
| EP0170589B1 true EP0170589B1 (en) | 1988-11-09 |
Family
ID=9306464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP85401490A Expired EP0170589B1 (en) | 1984-07-23 | 1985-07-19 | Microswitch |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4684770A (en) |
| EP (1) | EP0170589B1 (en) |
| DE (1) | DE3566190D1 (en) |
| FR (1) | FR2568054B1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2638888A1 (en) * | 1988-11-09 | 1990-05-11 | Crouzet Sa | IMPROVED ELECTRICAL SWITCHING DEVICE |
| FR2676585B1 (en) * | 1991-05-15 | 1993-12-10 | Roger Vialy | JOINT BLADE-TERMINAL JOINT FOR SWITCH. |
| FR2716746B1 (en) * | 1993-04-07 | 1997-01-10 | Roger Vialy | Snap-action microswitch with friction contacts. |
| EP0678882B1 (en) * | 1994-04-19 | 2000-06-28 | Marquardt GmbH | Electric switch and method for manufacturing the same |
| US7316167B2 (en) * | 2000-05-16 | 2008-01-08 | Fidelica, Microsystems, Inc. | Method and apparatus for protection of contour sensing devices |
| US6578436B1 (en) | 2000-05-16 | 2003-06-17 | Fidelica Microsystems, Inc. | Method and apparatus for pressure sensing |
| US7081593B2 (en) * | 2004-12-15 | 2006-07-25 | John David Hopkins | Quiet snap action switch |
| USD728472S1 (en) * | 2013-01-31 | 2015-05-05 | Omron Corporation | Microswitch |
| DE102014006033A1 (en) * | 2014-02-15 | 2015-08-20 | Johnson Electric Germany GmbH & Co. KG | An electrical microswitch comprising at least one electrical contact and method of manufacturing an electrical microswitch |
| CN109285705A (en) * | 2018-11-02 | 2019-01-29 | 中山市长合电器有限公司 | A kind of energy conservation and environmental protection switch link structure |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE902661C (en) * | 1941-10-07 | 1954-01-25 | Rau Fa G | Process for the production of contact bimetal and the extraction of objects from it which are used for making electrical contact |
| GB882850A (en) * | 1959-05-27 | 1961-11-22 | Controls Co Of America | Improvements in and relating to snap action electrical switches and a process for making the switches |
| US3098903A (en) * | 1961-07-21 | 1963-07-23 | Cherry Electrical Prod | Snap action switch |
| GB1133332A (en) * | 1965-01-27 | 1968-11-13 | Plessey Uk Ltd | Improvements relating to snap-action mechanisms |
| DE2122936A1 (en) * | 1970-11-30 | 1972-06-15 | Euromation Anstalt | Power switch and process for its manufacture |
| GB1405451A (en) * | 1972-01-06 | 1975-09-10 | Burgess Micro Switch Co Ltd | Snap-action electric switches |
| DE2228096C3 (en) * | 1972-06-09 | 1975-05-15 | Schiele Verwaltungsgesellschaft Mbh, 7746 Hornberg | Electrical, mechanically operated snap switch |
| US4130747A (en) * | 1977-10-12 | 1978-12-19 | Mcgill Manufacturing Company, Inc. | Miniature overtravel snap action switch with pivotal cam mounting for the switch blade |
| JPS59138131U (en) * | 1983-03-05 | 1984-09-14 | オムロン株式会社 | push button switch |
-
1984
- 1984-07-23 FR FR8411766A patent/FR2568054B1/en not_active Expired
-
1985
- 1985-07-18 US US06/756,255 patent/US4684770A/en not_active Expired - Fee Related
- 1985-07-19 EP EP85401490A patent/EP0170589B1/en not_active Expired
- 1985-07-19 DE DE8585401490T patent/DE3566190D1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US4684770A (en) | 1987-08-04 |
| FR2568054B1 (en) | 1987-05-22 |
| EP0170589A1 (en) | 1986-02-05 |
| DE3566190D1 (en) | 1988-12-15 |
| FR2568054A1 (en) | 1986-01-24 |
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