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EP0207816A1 - Snap action switch - Google Patents

Snap action switch Download PDF

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Publication number
EP0207816A1
EP0207816A1 EP86400893A EP86400893A EP0207816A1 EP 0207816 A1 EP0207816 A1 EP 0207816A1 EP 86400893 A EP86400893 A EP 86400893A EP 86400893 A EP86400893 A EP 86400893A EP 0207816 A1 EP0207816 A1 EP 0207816A1
Authority
EP
European Patent Office
Prior art keywords
blade
action
arm
arms
control 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.)
Granted
Application number
EP86400893A
Other languages
German (de)
French (fr)
Other versions
EP0207816B1 (en
Inventor
Alain Pitrat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CESSIONE;CROUZET AUTOMATISMES
Original Assignee
Thales Avionics SAS
Crouzet SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Thales Avionics SAS, Crouzet SA filed Critical Thales Avionics SAS
Publication of EP0207816A1 publication Critical patent/EP0207816A1/en
Application granted granted Critical
Publication of EP0207816B1 publication Critical patent/EP0207816B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/14—Operating parts, e.g. push-button
    • 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
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/14—Operating parts, e.g. push-button
    • H01H13/18—Operating parts, e.g. push-button adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift

Definitions

  • the present invention relates to snap action switches, of the type with prestressed moving element and more particularly those actuated by means of a control element whose point of action on the moving element is eccentric relative to the longitudinal axis of said control element.
  • Such switches are commonly used in industry and must meet very specific standards. This is so for their dimensions and for their fixing points, relative to the control element, in order to facilitate their interchangeability.
  • the main purpose of the snap action switch according to the invention is to eliminate these drawbacks.
  • its control element is arranged so that its guide in the housing is offset as far as possible from its tipping point.
  • this guide is offset more than the point of action of this control element on the movable element and in an opposite manner, so as to reduce as much as possible the friction on the housing.
  • this switch consists of a single part consisting of: - a control rod, - an arm offset from the longitudinal axis of the rod, coming to bear on one of the ends of a movable blade, - Two identical arms, in the shape of a fork, passing on either side of the movable blade to come into sliding contact on two flat faces, located below the action zone of the movable blade.
  • the support arm on the blade and the other two arms, in sliding support are opposite, that is to say arranged on either side of the axis of movement of the control element.
  • the two flat faces provided in the case are obtained directly at the time of molding of the case in the same way as the other forms necessary for guiding the movable element, the control element, and for fixing the fixed metal parts serving electrical connectors.
  • the switch comprises a housing 2, molded in insulating plastic material and provided of suitable shapes for inserting the various electrical elements therein, such as two terminals 6 and 7, one blade 3 of which alternately provides the electrical connection with a common terminal 5, depending on the position of a control element 1.
  • This blade is prestressed by arms 32, 33, in a known manner, as described in patent 80.23,497 in the name of the applicant, on a silver element, integral with the common terminal.
  • One of the ends 31 of this blade is subjected on the one hand to the action of a compression spring 4, bearing on a fixed element 22 of the housing, and on the other hand to the position of an element of control 1, which can be moved in translation according to arrow F in FIG. 1.
  • the control element passes through the housing 2, to be accessible from the outside, by a light 23 provided for this purpose with play.
  • An arm 11 is supported on the end 31 of the blade to transmit the displacements to it button 10.
  • the flat face 20 can be set back from the flat face 21 by a value ⁇ .
  • this offset ⁇ will be compensated for by an equivalent, relative excess thickness between the support zones of the arms 12, 13 to maintain correct alignment of the control element 1 in the housing.
  • the device, object of the invention makes it possible to comply with the standards of small switches, for industrial use, without increasing the operating forces while ensuring good guidance of their control element.

Landscapes

  • Tumbler Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Switches With Compound Operations (AREA)
  • Mechanisms For Operating Contacts (AREA)

Abstract

1. Quick-action switch of the type comprising a movable blade which is pre-stressed and actuated by means of a control member whereof the point of action is eccentric, characterised in that the control member consists of a single part (1) constituted by a control rod (10), an arm (11) which is eccentric with respect to the longitudinal axis of the control rod (10), coming into abutment with the end (31) of a movable blade (3), and by two other arms (12, 13), in the form of a fork, opposite the arm (11), said arms (12, 13) passing on either side of the blade (3) in order to bear against two plane faces (20, 21) situated below the zone of action of the movable blade.

Description

La présente invention concerne les interrupteurs à action brusque, du type à élément mobile précontraint et plus par­ticulièrement ceux actionnés au moyen d'un élément de com­mande dont le point d'action sur l'élément mobile est ex­centré par rapport à l'axe longitudinal dudit élément de commande. De tels interrupteurs sont couramment utilisés dans l'industrie et doivent satisfaire à des normes très précises. Il en est ainsi pour leurs dimensions et pour leurs points de fixation, par rapport à l'élément de com­mande, afin de faciliter leur interchangeabilité.The present invention relates to snap action switches, of the type with prestressed moving element and more particularly those actuated by means of a control element whose point of action on the moving element is eccentric relative to the longitudinal axis of said control element. Such switches are commonly used in industry and must meet very specific standards. This is so for their dimensions and for their fixing points, relative to the control element, in order to facilitate their interchangeability.

Suivant la conception du mécanisme interne de ces inter­rupteurs, il peut être nécessaire de prévoir un disposi­tif excentré pour en actionner l'élément mobile. Il en est par exemple ainsi dans le brevet français 1 334 642 dont l'élément de commande est en forme de L, pour dépor­ter son point d'action par rapport à son axe de déplace­ment en translation, dans le boitier de l'interrupteur. Du fait de l'excentration, l'élément de commande est sou­mis à un couple de basculement qui peut engendrer des ef­forts importants sur les parois du boitier et occasionner des coincements.Depending on the design of the internal mechanism of these switches, it may be necessary to provide an eccentric device for actuating the mobile element. This is for example the case in French patent 1 334 642, the control element of which is in the shape of an L, in order to offset its point of action relative to its axis of displacement in translation, in the housing of the switch. Due to the eccentricity, the control element is subjected to a tilting torque which can generate significant forces on the walls of the housing and cause jamming.

L'interrupteur à action brusque, suivant l'invention, a pour objet principal de supprimer ces inconvénients. Pour ce faire, son élément de commande est agencé de telle sorte que son guidage dans le boîtier soit déporté le plus loin possible de son point de basculement. D'autre part, ce guidage est déporté davantage que le point d'ac­tion de cet élément de commande sur l'élément mobile et de manière opposée, de façon à réduire au maximum les frottements sur le boitier. Une des caractéristiques prin­cipales de cet interrupteur est que son élément de com­mande consiste en une pièce unique constituée par :
- une tige de commande,
- un bras excentré par rapport à l'axe longitudinal de la tige, venant en appui sur une des extrémités d'une lame mobile,
- deux bras identiques, en forme de fourchette, passant de part et d'autre de la lame mobile pour venir en ap­pui glissant sur deux faces planes, situées au-dessous de la zone d'action de la lame mobile.The main purpose of the snap action switch according to the invention is to eliminate these drawbacks. To do this, its control element is arranged so that its guide in the housing is offset as far as possible from its tipping point. On the other hand, this guide is offset more than the point of action of this control element on the movable element and in an opposite manner, so as to reduce as much as possible the friction on the housing. One of the main characteristics of this switch is that its control element consists of a single part consisting of:
- a control rod,
- an arm offset from the longitudinal axis of the rod, coming to bear on one of the ends of a movable blade,
- Two identical arms, in the shape of a fork, passing on either side of the movable blade to come into sliding contact on two flat faces, located below the action zone of the movable blade.

Bien évidemment, pour compenser le couple de basculement, le bras d'appui sur la lame et les deux autres bras, en appui glissant, sont opposés, c'est-à-dire disposés de part et d'autre de l'axe de déplacement de l'élément de commande. Les deux faces planes prévues dans le boitier sont obtenues directement au moment du moulage du boi­tier au même titre que les autres formes nécessaires au guidage de l'élément mobile, de l'élément de commande, et à la fixation des pièces métalliques fixes servant de connecteurs électriques. Pour faciliter ce moulage, il peut être avantageux de décaler légèrement les deux faces planes, selon deux plans parallèles, distants d'une va­leur ε .Obviously, to compensate for the tilting torque, the support arm on the blade and the other two arms, in sliding support, are opposite, that is to say arranged on either side of the axis of movement of the control element. The two flat faces provided in the case are obtained directly at the time of molding of the case in the same way as the other forms necessary for guiding the movable element, the control element, and for fixing the fixed metal parts serving electrical connectors. To facilitate this molding, it may be advantageous to slightly offset the two flat faces, in two parallel planes, spaced by a value ε.

Dans ces conditions, le décalage ε sera compensé sur les zones d'appui des bras venant en contact glissant sur les dites faces planes.Under these conditions, the offset ε will be compensated for on the support zones of the arms coming into sliding contact on said flat faces.

Le dessin annexé illustre, à titre d'exemple, un mode de réalisation d'un interrupteur conforme à la présente in­vention.

  • - La figure 1 est une vue de l'élément de commande agis­sant sur la lame mobile.
  • - La figure 2 est une vue d'ensemble de l'interrupteur dépourvu de son couvercle.
The accompanying drawing illustrates, by way of example, an embodiment of a switch according to the present invention.
  • - Figure 1 is a view of the control element acting on the movable blade.
  • - Figure 2 is an overview of the switch without its cover.

Tel que représenté, figure 2, l'interrupteur comprend un boitier 2, moulé en matériau plastique isolant et pourvu de formes adéquates pour y insérer les divers éléments électriques tels que, deux cosses 6 et 7 dont une lame 3 assure alternativement la liaison électrique avec une cosse commune 5, suivant la position d'un élément de com­mande 1.As shown in Figure 2, the switch comprises a housing 2, molded in insulating plastic material and provided of suitable shapes for inserting the various electrical elements therein, such as two terminals 6 and 7, one blade 3 of which alternately provides the electrical connection with a common terminal 5, depending on the position of a control element 1.

Cette lame est précontrainte par des bras 32, 33, de façon connue, tel que décrit dans le brevet 80.23 497 au nom de la demanderesse, sur un élément argenté, solidaire de la cosse commune.This blade is prestressed by arms 32, 33, in a known manner, as described in patent 80.23,497 in the name of the applicant, on a silver element, integral with the common terminal.

L'une des extrêmités 31 de cette lame est soumise d'une part à l'action d'un ressort de compression 4, en appui sur un élément fixe 22 de boitier, et d'autre part à la position d'un élément de commande 1, pouvant être dé­placé en translation selon la flèche F de la figure 1.One of the ends 31 of this blade is subjected on the one hand to the action of a compression spring 4, bearing on a fixed element 22 of the housing, and on the other hand to the position of an element of control 1, which can be moved in translation according to arrow F in FIG. 1.

L'élément de commande passe au travers du boitier 2, pour être accessible de l'extérieur, par une lumière 23 prévue à cet effet avec jeu. Un bras 11 est en appui sur l'ex­trêmité 31 de la lame pour lui transmettre les déplace­ments du bouton 10.The control element passes through the housing 2, to be accessible from the outside, by a light 23 provided for this purpose with play. An arm 11 is supported on the end 31 of the blade to transmit the displacements to it button 10.

A l'opposé du bras 11, deux autres bras 12, 13, relative­ment fins, passent de part et d'autre de la lame 3. Leurs extrêmités 14, 15, viennent en appui sur deux faces pla­nes 20 - 21 du boitier. Un dégagement 24 dans le boitier, et son équivalent dans le couvercle, facilite le passage des bras 12 - 13. Ces faces 20 - 21 sont sensiblement perpendiculaires au plan balayé par la lame mobile 3. Lorsqu'on appuie sur le bouton 10 dans la direction de la flèche F, l'action R du ressort de compression 4 sur le bras 11 crée un couple de renversement du bouton se traduisant par un effort F1 sur le boitier 2. Cet effort serait important s'il n'était équilibré et réduit par l'existence de deux bras 12, 13 dont les zones d'appui 14, 15 sur les faces 20 - 21 sont éloignées du point d'ac­tion 11.Opposite the arm 11, two other relatively thin arms 12, 13 pass on either side of the blade 3. Their ends 14, 15 come to bear on two flat faces 20 - 21 of the case. A clearance 24 in the case, and its equivalent in the cover, facilitates the passage of the arms 12 - 13. These faces 20 - 21 are substantially perpendicular to the plane swept by the movable blade 3. When the button 10 is pressed in the direction of the arrow F, the action R of the compression spring 4 on the arm 11 creates a reversal torque of the button resulting in an effort F1 on the housing 2. This effort would be significant if it were not balanced and reduced by the existence of two arms 12, 13 whose bearing zones 14, 15 on the faces 20 - 21 are distant from the action point 11.

En variante et pour faciliter le démoulage du boitier 2 par son côté ouvert, la face plane 20 peut être en re­trait de la face plane 21 d'une valeur ε . Dans ces con­ditions, ce décalage ε sera compensé par une surépaisseur relative, équivalente, entre les zones d'appui des bras 12, 13 pour maintenir un alignement correct de l'élément de commande 1 dans le boitier.As a variant and to facilitate demoulding of the case 2 by its open side, the flat face 20 can be set back from the flat face 21 by a value ε. Under these conditions, this offset ε will be compensated for by an equivalent, relative excess thickness between the support zones of the arms 12, 13 to maintain correct alignment of the control element 1 in the housing.

Le dispositif, objet de l'invention, permet de respecter les normes des petits interrupteurs, à usage industriel, sans en augmenter les forces de manoeuvre tout en assu­rant un bon guidage de leur élément de commande.The device, object of the invention, makes it possible to comply with the standards of small switches, for industrial use, without increasing the operating forces while ensuring good guidance of their control element.

Claims (2)

1.- Interrupteur à action brusque du type à lame mobile précontrainte et actionnée au moyen d'un élément de com­mande dont le point d'action est excentré,caractérisé en ce que l'élément de commande consiste en une pièce uni­que (1) constituée d'une tige de commande (10), d'un bras (11) excentré par rapport à l'axe longitudinal de la tige, venant en apui sur l'extrémité (31) d'une lame (3), et de deux autres bras (12, 13), en forme de fourchette, oppo­sés au bras (11), lesdits bras passant de part et d'autre de la lame (3) pour venir en appui sur deux faces planes (20, 21) situées au dessous de la zone d'action de la lame.1.- Snap action switch of the preloaded movable blade type and actuated by means of a control element whose point of action is eccentric, characterized in that the control element consists of a single piece (1) consisting a control rod (10), an arm (11) eccentric relative to the longitudinal axis of the rod, coming to bear on the end (31) of a blade (3), and two other arms (12, 13), fork-shaped, opposite the arm (11), said arms passing on either side of the blade (3) to come to bear on two flat faces (20, 21) located at below the action area of the blade. 2.- Interrupteur à action brusque selon la revendication 1, caractérisé en ce que, pour faciliter le moulage du boi­tier, les deux faces planes (20, 21) sont disposées selon deux plans parallèles distincts dont le décalage (ε) est compensé sur les zones d'appui des bras (12, 13).2.- Snap action switch according to claim 1, characterized in that, to facilitate the molding of the housing, the two flat faces (20, 21) are arranged in two separate parallel planes whose offset (ε) is compensated for on arm support zones (12, 13).
EP19860400893 1985-04-29 1986-04-24 Snap action switch Expired - Lifetime EP0207816B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8506630A FR2581240B1 (en) 1985-04-29 1985-04-29 QUICK ACTION SWITCH
FR8506630 1985-04-29

Publications (2)

Publication Number Publication Date
EP0207816A1 true EP0207816A1 (en) 1987-01-07
EP0207816B1 EP0207816B1 (en) 1990-07-04

Family

ID=9318866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860400893 Expired - Lifetime EP0207816B1 (en) 1985-04-29 1986-04-24 Snap action switch

Country Status (4)

Country Link
EP (1) EP0207816B1 (en)
DE (1) DE3672404D1 (en)
ES (1) ES293850Y (en)
FR (1) FR2581240B1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2813943A (en) * 1955-04-25 1957-11-19 Pass & Seymour Inc Industrial snap switch
US3098904A (en) * 1961-07-21 1963-07-23 Cherry Electrical Prod Snap action switch
FR1361230A (en) * 1963-03-01 1964-05-15 Cherry Electrical Prod Snap-to-close and snap-action switch
FR1434726A (en) * 1964-05-22 1966-04-08 Navigation Computer Corp Hand operated push button switch, especially for keyboards, where contacts do not bounce
US3459059A (en) * 1967-03-03 1969-08-05 Telemecanique Electrique Lateral-actuation device,more particularly adaptable to electric switches or the like
GB2088133A (en) * 1980-11-03 1982-06-03 Crouzet Sa Snap-action Switch

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2813943A (en) * 1955-04-25 1957-11-19 Pass & Seymour Inc Industrial snap switch
US3098904A (en) * 1961-07-21 1963-07-23 Cherry Electrical Prod Snap action switch
FR1361230A (en) * 1963-03-01 1964-05-15 Cherry Electrical Prod Snap-to-close and snap-action switch
FR1434726A (en) * 1964-05-22 1966-04-08 Navigation Computer Corp Hand operated push button switch, especially for keyboards, where contacts do not bounce
US3459059A (en) * 1967-03-03 1969-08-05 Telemecanique Electrique Lateral-actuation device,more particularly adaptable to electric switches or the like
GB2088133A (en) * 1980-11-03 1982-06-03 Crouzet Sa Snap-action Switch

Also Published As

Publication number Publication date
FR2581240A1 (en) 1986-10-31
ES293850Y (en) 1987-06-01
FR2581240B1 (en) 1988-12-23
ES293850U (en) 1986-10-01
DE3672404D1 (en) 1990-08-09
EP0207816B1 (en) 1990-07-04

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