EP1533823B1 - Microswitch - Google Patents

Microswitch Download PDF

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Publication number
EP1533823B1
EP1533823B1 EP04354029A EP04354029A EP1533823B1 EP 1533823 B1 EP1533823 B1 EP 1533823B1 EP 04354029 A EP04354029 A EP 04354029A EP 04354029 A EP04354029 A EP 04354029A EP 1533823 B1 EP1533823 B1 EP 1533823B1
Authority
EP
European Patent Office
Prior art keywords
button
push
blade
pusher
compression spring
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 - Lifetime
Application number
EP04354029A
Other languages
German (de)
French (fr)
Other versions
EP1533823A1 (en
Inventor
Stéphane Schneider Electric Industries Collot
Bernard Schneider Electric Industries Truchet
Christian Schneider Electric Industries Roux
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.)
Crouzet Automatismes SAS
Original Assignee
Crouzet Automatismes SAS
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Publication date
Application filed by Crouzet Automatismes SAS filed Critical Crouzet Automatismes SAS
Priority to PL04354029T priority Critical patent/PL1533823T3/en
Publication of EP1533823A1 publication Critical patent/EP1533823A1/en
Application granted granted Critical
Publication of EP1533823B1 publication Critical patent/EP1533823B1/en
Anticipated expiration legal-status Critical
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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
    • H01H13/26—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
    • H01H11/0006—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches
    • H01H11/0012—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches for converting normally open to normally closed switches and vice versa
    • 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
    • H01H13/20—Driving mechanisms
    • 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
    • H01H13/40—Blade spring with at least one snap-acting leg and at least one separate contact-carrying or contact-actuating leg

Definitions

  • the invention relates to a microswitch, that is to say a device of reduced dimensions ensuring a switching function of an electric current.
  • microswitches are frequently used in many fields of activity using switching functions of an electric current, such as automotive or household appliances. Depending on the function performed, these may be contactors that establish an electric current when they are actuated, breakers that cut an electric current when they are actuated, or inverters that switch two electric currents depending on whether they are in their state of rest or their actuated state.
  • the invention relates to microswitches comprising a sudden-action mechanism actuated by a pusher.
  • a microswitch according to the state of the art is for example described in the documents DE19834888 , US5181603 , EP0789373 , US 5566819 or US 4543459 .
  • the microswitch must at best meet often conflicting constraints in terms of cost, size, reliability and ease of implementation. In particular, it must be of reduced dimensions, and at the same time offer the pusher the greatest possible over-travel in order to facilitate or avoid the mechanical adjustments of the system in which it will be used; overtravel being the distance that can travel the pusher after the device has switched.
  • the microswitches described in the documents DE19834888 and US5181603 only offer a slight over-stroke of the pusher.
  • the pusher will exert on the switching mechanism a mechanical force increasingly important, which reduces the mechanical reliability of the microswitch.
  • the microswitch device described in the document EP0789373 offers a significant over-stroke of the pusher but the switching mechanism undergoes stresses and deformations throughout this over-stroke which affects the mechanical reliability of the device by tiring the blade and reducing its endurance, more friction occurs at the contact, which accelerates the wear of surface treatments and decreases the longevity of the device.
  • the mechanical forces exerted by the blade on the pusher induce significant friction.
  • the invention therefore aims to overcome the disadvantages of microswitches according to the state of the art, allowing a great over-stroke of the pusher while ensuring excellent electrical and mechanical reliability through a reduction of fatigue of the elements.
  • the subject of the invention is an electric microswitch, comprising a housing including a lid part and a base part from which a plurality of electrical terminals protrude, an instantaneous switching mechanism placed in the housing and comprising a blade flexible conductor subjected to substantially longitudinal prestressing, and a pusher slidably mounted through the lid-forming portion of the housing to actuate the instant mechanism, and further comprising a compression spring which opposes the sliding of the pusher, the blade flexible conductor being held under stress by the pusher and the compression spring by means of a stop placed on the pusher in the rest position of the microswitch, and the conductive blade being released from any constraint of the pusher and the compression spring in the actuated position of the microswitch.
  • the pusher passes through the flexible conductive blade
  • one end of the compression spring is housed in a recess of the pusher
  • the flexible conductive blade is prestressed by mounting between two notches or between a notch and a holding bend.
  • the microswitch comprises a housing consisting of a base portion (10) from which a plurality of electrical terminals (11, 12, 13) and a cover portion (20) project.
  • a snap mechanism is placed in the housing and provides the switching function corresponding to a contactor, a breaker or an inverter depending on the application.
  • This switching mechanism conventionally comprises a flexible conductive blade (40) having a tongue (45) subjected to substantially longitudinal prestressing. Depending on the position of the minirutor, the blade makes it possible to establish an electrical connection between a terminal (13) and one of the two other terminals (11) and (12).
  • the flexible conductive blade (40) comprises a tongue (45) and two legs (46, 47) separated by a recess. The free end of the tongue (45) is inserted into a first notch (15) on the portion of the base housing (10) and the two legs (46, 47) are inserted into a second notch (61). located on an insert (60), so as to subject the tongue (45) to a substantially longitudinal mechanical prestress which tends to maintain the movable end of the flexible conductive blade (40) pressed against the contact (70) closest from the base (10).
  • a pusher (30) is slidably mounted in the portion of the cover housing (20) to actuate the switching mechanism.
  • a compression spring (50) is placed between the base housing (10) and the pusher (30) so that it opposes the sliding of the pusher (30) over the entire stroke, and exerts a return force when the pusher (30) is in the rest position.
  • the pusher (30) is provided with at least one abutment (35) which presses on a limb (46) of the flexible conductive blade (40) so as to exert a force on the blade (40), but only on part of the stroke of the pusher (30).
  • the compression spring (50) exerts on the pusher (30), and therefore on its abutment (35), a force greater than the effect of the prestressing so that it maintains the movable end of the conductive blade flexible (40) pressed against the contact (71) furthest from the base housing part (10).
  • the pusher (30) Upon actuation of the microswitch, the pusher (30) will gradually oppose the action of the compression spring (50) on the limb (46,47) of the blade (40) as and when it will be depressed until the flexible conductive blade (40) suddenly switches to the switched position under the effect of prestressing, as shown in FIG. Figure 3 .
  • the stroke of the pusher (30) can then be extended to an extreme position shown in FIG. Figure 4 , compressing the spring (50), without the conductive blade (40) no longer experiencing any force from the pusher (30).
  • the flexible blade (40) undergoes very little fatigue because its travel is very low, and it undergoes only limited forces, which ensures a very high mechanical endurance and excellent reliability of the sudden break mechanism that provides the switching function .
  • the low clearance also limits the friction between the one or more fixed contacts (70, 71) connected to the terminals (11, 12) of the microswitch and the contact or contacts which are placed at the mobile end of the flexible blade (40). ), thus ensuring high electrical reliability through the reduction of wear of the contacts, in particular surface treatments.
  • the forces exerted by the pusher (30) on the blade (40) are parallel to the axis of the pusher (30) and do not induce friction during its sliding.
  • the pusher (30) of the microswitch has a large over-stroke by simple compression of the spring (50), which guarantees a great mechanical endurance and an excellent reliability of the device, without having the disadvantages of microswitches according to the prior art.
  • the pusher (30) passes through the recess separating the two branches (46, 47) of the flexible conductive blade (40), in order to balance the mechanical forces, to simplify the construction of the device and to reduce it. footprint.
  • one end of the compression spring (50) is placed in a recess provided in the pusher (30) as shown in FIG. Figure 2 .
  • the spring (50) enters the recess as it is compressed by the pusher (30). In this way, it is possible to obtain a maximum stroke for the pusher (30) relative to the dimensions of the microswitch.
  • a seal (80) may be used as shown on the Figure 2 to seal the device around the pusher (30).
  • a seal or other sealing device (not shown) can then also be placed between the base housing part (10) and the cover housing part (20).
  • the Figures 5, 6 and 7, 8 correspond to the Figures 1 and 2 for two embodiments illustrating alternative solutions for prestressing the flexible conductive blade (40).
  • the limbs (46, 47) of the flexible blade (40) terminate in a holding bend (48) which abuts on a protrusion of the base housing part.
  • the branches (46, 47) of the flexible blade (40) meet and come to bear on one or more uprights (90) which are either placed on an insert or from the base housing (10) or from the terminal (13).

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  • Slide Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

The micro-switch has a compression spring (50) opposite to a sliding of a push-button (30). A flexible conductor blade (40) is maintained under stress by the push-button and the spring by using a stopper (35) placed on the push-button in neutral position of the micro-switch. The blade is released from the stress of the push-button (30) and the spring when the micro-switch is in actuated position.

Description

DOMAINE TECHNIQUE DE L'INVENTIONTECHNICAL FIELD OF THE INVENTION

L'invention est relative à un minirupteur, c'est à dire un dispositif de dimensions réduites assurant une fonction de commutation d'un courant électrique.The invention relates to a microswitch, that is to say a device of reduced dimensions ensuring a switching function of an electric current.

ETAT DE LA TECHNIQUESTATE OF THE ART

Les minirupteurs sont fréquemment utilisés dans de nombreux domaines d'activité ayant recours à des fonctions de commutation d'un courant électrique, comme la construction automobile ou l'électroménager. Selon la fonction remplie, il peut s'agir de dispositifs contacteurs qui établissent un courant électrique lorsqu'ils sont actionnés, de dispositifs rupteurs qui coupent un courant électrique lorsqu'ils sont actionnés ou bien d'inverseurs qui commutent deux courants électriques selon qu'ils sont dans leur état de repos ou leur état actionné.The microswitches are frequently used in many fields of activity using switching functions of an electric current, such as automotive or household appliances. Depending on the function performed, these may be contactors that establish an electric current when they are actuated, breakers that cut an electric current when they are actuated, or inverters that switch two electric currents depending on whether they are in their state of rest or their actuated state.

L'invention concerne les minirupteurs comprenant un mécanisme à rupture brusque actionné par un poussoir. Un tel minirupteur selon l'état de la technique est par exemple décrit dans les documents DE19834888 , US5181603 , EP0789373 , US 5566819 ou US 4543459 .The invention relates to microswitches comprising a sudden-action mechanism actuated by a pusher. Such a microswitch according to the state of the art is for example described in the documents DE19834888 , US5181603 , EP0789373 , US 5566819 or US 4543459 .

Indépendamment de la fonction qu'il remplit, le minirupteur doit satisfaire au mieux à des contraintes souvent contraires en matière de coût, de dimensions, de fiabilité et de facilité de mise en oeuvre. En particulier, il doit être de dimensions réduites, et dans le même temps offrir au poussoir la plus grande sur-course possible afin de faciliter ou d'éviter les réglages mécaniques du système dans lequel il sera utilisé ; la sur-course étant la distance que peut parcourir le poussoir après que le dispositif ait commuté.Regardless of the function it performs, the microswitch must at best meet often conflicting constraints in terms of cost, size, reliability and ease of implementation. In particular, it must be of reduced dimensions, and at the same time offer the pusher the greatest possible over-travel in order to facilitate or avoid the mechanical adjustments of the system in which it will be used; overtravel being the distance that can travel the pusher after the device has switched.

Ainsi, les minirupteurs décrits dans les documents DE19834888 et US5181603 n'offrent qu'une faible sur-course du poussoir. De plus, lors de la sur-course, le poussoir va exercer sur le mécanisme de commutation une force mécanique de plus en plus importante, ce qui réduit d'autant la fiabilité mécanique du minirupteur. Le dispositif minirupteur décrit dans le document EP0789373 offre une sur-course importante du poussoir mais le mécanisme de commutation subit des contraintes et des déformations tout au long de cette sur-course ce qui nuit à la fiabilité mécanique du dispositif en fatiguant la lame et en réduisant son endurance, de plus des frottements se produisent au niveau du contact, ce qui accélère l'usure des traitements de surface et diminue la longévité du dispositif. Enfin, les forces mécaniques exercées par la lame sur le poussoir induisent des frottements importants.Thus, the microswitches described in the documents DE19834888 and US5181603 only offer a slight over-stroke of the pusher. In addition, during the over-stroke, the pusher will exert on the switching mechanism a mechanical force increasingly important, which reduces the mechanical reliability of the microswitch. The microswitch device described in the document EP0789373 offers a significant over-stroke of the pusher but the switching mechanism undergoes stresses and deformations throughout this over-stroke which affects the mechanical reliability of the device by tiring the blade and reducing its endurance, more friction occurs at the contact, which accelerates the wear of surface treatments and decreases the longevity of the device. Finally, the mechanical forces exerted by the blade on the pusher induce significant friction.

EXPOSE DE L'INVENTIONSUMMARY OF THE INVENTION

L'invention vise donc à remédier aux inconvénients des minirupteurs selon l'état de la technique, en permettant une grande sur-course du poussoir tout en assurant une excellente fiabilité électrique et mécanique grâce à une réduction de la fatigue des éléments.The invention therefore aims to overcome the disadvantages of microswitches according to the state of the art, allowing a great over-stroke of the pusher while ensuring excellent electrical and mechanical reliability through a reduction of fatigue of the elements.

A cet effet, l'invention a pour objet un minirupteur électrique, comprenant un boîtier incluant une partie faisant couvercle et une partie faisant base à partir de laquelle font saillie plusieurs bornes électriques, un mécanisme de commutation instantanée placé dans le boîtier et comprenant une lame conductrice souple soumise à une précontrainte sensiblement longitudinale, et un poussoir monté de façon coulissante à travers la partie du boîtier faisant couvercle de façon à actionner le mécanisme instantané, et comprenant également un ressort de compression qui s'oppose au coulissement du poussoir, la lame conductrice souple étant maintenue sous contrainte par le poussoir et le ressort de compression au moyen d'une butée placée sur le poussoir en position de repos du minirupteur, et la lame conductrice étant libérée de toute contrainte du poussoir et du ressort de compression en position actionnée du minirupteur.To this end, the subject of the invention is an electric microswitch, comprising a housing including a lid part and a base part from which a plurality of electrical terminals protrude, an instantaneous switching mechanism placed in the housing and comprising a blade flexible conductor subjected to substantially longitudinal prestressing, and a pusher slidably mounted through the lid-forming portion of the housing to actuate the instant mechanism, and further comprising a compression spring which opposes the sliding of the pusher, the blade flexible conductor being held under stress by the pusher and the compression spring by means of a stop placed on the pusher in the rest position of the microswitch, and the conductive blade being released from any constraint of the pusher and the compression spring in the actuated position of the microswitch.

Selon un mode de réalisation particulièrement simple, que le poussoir traverse la lame conductrice soupleAccording to a particularly simple embodiment, the pusher passes through the flexible conductive blade

Avantageusement, une extrémité du ressort de compression se loge dans un évidemment du poussoirAdvantageously, one end of the compression spring is housed in a recess of the pusher

Optionnellement, la lame conductrice souple est précontrainte par montage entre deux encoches ou entre une encoche et un pliage de maintien.Optionally, the flexible conductive blade is prestressed by mounting between two notches or between a notch and a holding bend.

BREVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre de modes particuliers de réalisation de l'invention, donnés à titre d'exemples non limitatifs, et représentés aux dessins annexés sur lesquels :

  • la figure 1 représente une vue en élévation d'un premier minirupteur selon l'invention sans la partie de boîtier formant couvercle ;
  • la figure 2 représente une coupe partielle du minirupteur de la Figure 1 ;
  • les figures 3 et 4 représentent des coupes partielles du minirupteur de la Figure 1 en position actionnée ;
  • les figures 5 et 6 représentent un second minirupteur selon l'invention.
  • les figures 7 et 8 représentent un troisième minirupteur selon l'invention.
Other advantages and features will emerge more clearly from the following description of particular embodiments of the invention, given by way of non-limiting examples, and represented in the accompanying drawings in which:
  • the figure 1 is an elevational view of a first microswitch according to the invention without the cover housing part;
  • the figure 2 represents a partial section of the microswitch of the Figure 1 ;
  • the Figures 3 and 4 represent partial cuts of the microswitch of the Figure 1 in the actuated position;
  • the Figures 5 and 6 represent a second microswitch according to the invention.
  • the Figures 7 and 8 represent a third microswitch according to the invention.

DESCRIPTION DETAILLEE D'UN MODE DE REALISATIONDETAILED DESCRIPTION OF AN EMBODIMENT

Un premier mode de réalisation d'un minirupteur selon l'invention et représenté sur les figure 1 à 4. Le minirupteur comprend un boîtier composé d'une partie faisant base (10), à partir de laquelle font saillie plusieurs bornes électriques (11, 12, 13) et d'une partie formant couvercle (20).A first embodiment of a microswitch according to the invention and represented on the figure 1 to 4 . The microswitch comprises a housing consisting of a base portion (10) from which a plurality of electrical terminals (11, 12, 13) and a cover portion (20) project.

Un mécanisme de rupture brusque est placé dans le boîtier et assure la fonction de commutation correspondant à un contacteur, à un rupteur ou à un inverseur selon l'application. Ce mécanisme de commutation comprend de façon classique une lame conductrice souple (40) comportant une langue (45) soumise à une précontrainte sensiblement longitudinale. Selon la position du miniruteur, la lame permet d'établir une liaison électrique entre une borne (13) et l'une des deux autres bornes (11) et (12). Dans cet exemple de réalisation, la lame conductrice souple (40) comprend une langue (45) et deux branches (46, 47) séparées par un évidement. L'extrémité libre de la langue (45) est insérée dans une première encoche (15) se trouvant sur la partie du boîtier faisant base (10) et les deux branches (46, 47) sont insérées dans une seconde encoche (61) se trouvant sur une pièce rapportée (60), de façon à soumettre la langue (45) à une précontrainte mécanique sensiblement longitudinale qui tend à maintenir l'extrémité mobile de la lame conductrice souple (40) plaquée contre le contact (70) le plus proche de la base (10).A snap mechanism is placed in the housing and provides the switching function corresponding to a contactor, a breaker or an inverter depending on the application. This switching mechanism conventionally comprises a flexible conductive blade (40) having a tongue (45) subjected to substantially longitudinal prestressing. Depending on the position of the minirutor, the blade makes it possible to establish an electrical connection between a terminal (13) and one of the two other terminals (11) and (12). In this embodiment, the flexible conductive blade (40) comprises a tongue (45) and two legs (46, 47) separated by a recess. The free end of the tongue (45) is inserted into a first notch (15) on the portion of the base housing (10) and the two legs (46, 47) are inserted into a second notch (61). located on an insert (60), so as to subject the tongue (45) to a substantially longitudinal mechanical prestress which tends to maintain the movable end of the flexible conductive blade (40) pressed against the contact (70) closest from the base (10).

Un poussoir (30) est monté de façon coulissante dans la partie du boîtier faisant couvercle (20), de façon à actionner le mécanisme de commutation. Un ressort de compression (50) est placé entre le boîtier faisant base (10) et le poussoir (30) de telle sorte qu'il s'oppose au coulissement du poussoir (30) sur toute la course, et qu'il exerce une force de rappel lorsque le poussoir (30) est en position de repos.A pusher (30) is slidably mounted in the portion of the cover housing (20) to actuate the switching mechanism. A compression spring (50) is placed between the base housing (10) and the pusher (30) so that it opposes the sliding of the pusher (30) over the entire stroke, and exerts a return force when the pusher (30) is in the rest position.

Comme représenté sur les Figures 3 et 4, le poussoir (30) est muni d'au moins une butée (35) qui vient appuyer sur une branche (46) de la lame conductrice souple (40) de façon à exercer une force sur la lame (40), mais uniquement sur une partie de la course du poussoir (30). Ainsi, dans la position de repos du minirupteur qui correspond à la Figure 2, le ressort de compression (50) exerce sur le poussoir (30), et donc sur sa butée (35), une force supérieure à l'effet de la précontrainte de telle sorte qu'il maintient l'extrémité mobile de la lame conductrice souple (40) plaquée contre le contact (71) le plus éloigné de la partie du boîtier formant base (10).As shown on Figures 3 and 4 , the pusher (30) is provided with at least one abutment (35) which presses on a limb (46) of the flexible conductive blade (40) so as to exert a force on the blade (40), but only on part of the stroke of the pusher (30). So, in the rest position of the microswitch that corresponds to the Figure 2 , the compression spring (50) exerts on the pusher (30), and therefore on its abutment (35), a force greater than the effect of the prestressing so that it maintains the movable end of the conductive blade flexible (40) pressed against the contact (71) furthest from the base housing part (10).

Lors de l'actionnement du minirupteur, le poussoir (30) va progressivement s'opposer à l'action du ressort de compression (50) sur la branche (46,47) de la lame (40) au fur et à mesure qu'il sera enfoncé, jusqu'à ce que la lame conductrice souple (40) bascule brusquement en position commutée sous l'effet de la précontrainte, comme représenté à la Figure 3. La course du poussoir (30) peut alors être prolongée jusqu'à une position extrême représentée à la Figure 4, en comprimant le ressort (50), sans que la lame conductrice (40) ne subisse plus aucune force de la part du poussoir (30).Upon actuation of the microswitch, the pusher (30) will gradually oppose the action of the compression spring (50) on the limb (46,47) of the blade (40) as and when it will be depressed until the flexible conductive blade (40) suddenly switches to the switched position under the effect of prestressing, as shown in FIG. Figure 3 . The stroke of the pusher (30) can then be extended to an extreme position shown in FIG. Figure 4 , compressing the spring (50), without the conductive blade (40) no longer experiencing any force from the pusher (30).

La lame souple (40) subit très peu de fatigue car son débattement est très faible, et elle ne subit que des forces limitées, ce qui assure une très grande endurance mécanique et une excellente fiabilité du mécanisme de rupture brusque qui assure la fonction de commutation. En outre, le faible débattement limite également les frottements entre le ou les contacts fixes (70, 71) reliés aux bornes (11, 12) du minirupteur et le ou les contacts qui sont placés à l'extrémité mobile de la lame souple (40), en assurant ainsi une grand fiabilité électrique grâce à la réduction de l'usure des contacts, en particulier des traitements de surfaces. Enfin, les forces exercées par le poussoir (30) sur la lame (40) sont parallèles à l'axe du poussoir (30) et n'induisent pas de frottements lors de son coulissement.The flexible blade (40) undergoes very little fatigue because its travel is very low, and it undergoes only limited forces, which ensures a very high mechanical endurance and excellent reliability of the sudden break mechanism that provides the switching function . In addition, the low clearance also limits the friction between the one or more fixed contacts (70, 71) connected to the terminals (11, 12) of the microswitch and the contact or contacts which are placed at the mobile end of the flexible blade (40). ), thus ensuring high electrical reliability through the reduction of wear of the contacts, in particular surface treatments. Finally, the forces exerted by the pusher (30) on the blade (40) are parallel to the axis of the pusher (30) and do not induce friction during its sliding.

Par conséquent, le poussoir (30) du minirupteur dispose d'une grande sur-course par simple compression du ressort (50), ce qui garantit une grande endurance mécanique et une excellente fiabilité du dispositif, sans avoir les inconvénients des minirupteurs selon l'art antérieur.Consequently, the pusher (30) of the microswitch has a large over-stroke by simple compression of the spring (50), which guarantees a great mechanical endurance and an excellent reliability of the device, without having the disadvantages of microswitches according to the prior art.

Préférentiellement, le poussoir (30) traverse l'évidement séparant les deux branches (46, 47) de la lame conductrice souple (40), afin d'équilibrer les forces mécaniques, de simplifier la construction du dispositif et d'en réduire l'encombrement.Preferably, the pusher (30) passes through the recess separating the two branches (46, 47) of the flexible conductive blade (40), in order to balance the mechanical forces, to simplify the construction of the device and to reduce it. footprint.

De façon préférentielle, une extrémité du ressort de compression (50) est placée dans un évidement prévu dans le poussoir (30) comme représenté à la Figure 2. Le ressort (50) rentre dans l'évidement au fur et à mesure qu'il est comprimé par le poussoir (30). De cette manière, il est possible d'obtenir une course maximale pour le poussoir (30) par rapport aux dimensions du minirupteur.Preferably, one end of the compression spring (50) is placed in a recess provided in the pusher (30) as shown in FIG. Figure 2 . The spring (50) enters the recess as it is compressed by the pusher (30). In this way, it is possible to obtain a maximum stroke for the pusher (30) relative to the dimensions of the microswitch.

Optionnellement, par exemple si cela est imposé par l'environnement dans lequel le minirupteur sera utilisé, un joint (80) peut être utilisé comme représenté sur la Figure 2 afin d'assurer l'étanchéité du dispositif autour du poussoir (30). Un joint ou autres dispositifs d'étanchéité non représenté peut alors également être placé entre la partie du boîtier formant base (10) et la partie du boîtier formant couvercle (20).Optionally, for example if imposed by the environment in which the microswitch will be used, a seal (80) may be used as shown on the Figure 2 to seal the device around the pusher (30). A seal or other sealing device (not shown) can then also be placed between the base housing part (10) and the cover housing part (20).

Les Figures 5, 6 et 7, 8 correspondent respectivement aux Figures 1 et 2, pour deux modes de réalisation illustrant des solutions alternatives pour pré-contraindre la lame conductrice souple (40). Dans le mode de réalisation représenté sur les Figures 5 et 6, les branches (46, 47) de la lame souple (40) se terminent par un pliage de maintien (48) qui vient s'appuyer sur une excroissance de la partie de boîtier formant base. Dans le mode de réalisation représenté sur les Figures 7 et 8, les branches (46, 47) de la lame souple (40) se rejoignent et viennent prendre appui sur un ou plusieurs montants (90) qui sont soit placés sur une pièce rapportée soit issus du boîtier formant base (10) ou encore issus de la borne (13).The Figures 5, 6 and 7, 8 correspond to the Figures 1 and 2 for two embodiments illustrating alternative solutions for prestressing the flexible conductive blade (40). In the embodiment shown on the Figures 5 and 6 the limbs (46, 47) of the flexible blade (40) terminate in a holding bend (48) which abuts on a protrusion of the base housing part. In the embodiment shown on the Figures 7 and 8 , the branches (46, 47) of the flexible blade (40) meet and come to bear on one or more uprights (90) which are either placed on an insert or from the base housing (10) or from the terminal (13).

Les Figures 5 à 8 permettent également d'illustrer le fait que l'invention s'applique quelle que soit la forme des éléments reliés aux bornes (11, 12) et portant les contacts fixes (70, 71) lorsqu'ils sont présents.The Figures 5 to 8 also illustrate that the invention applies regardless of the shape of the elements connected to the terminals (11, 12) and carrying the fixed contacts (70, 71) when present.

Claims (5)

  1. Electric mini-switch, comprising
    - a case including a case part forming a cover (20) and a case part forming a base (10) wherefrom several electric terminals (11, 12, 13) are salient,
    - a high-speed breaking mechanism placed in the case and comprising a flexible conducting blade (40) comprising a tongue (45) and two branches (46, 47) separated by a recess, and
    - a push-button (30) mounted sliding through the part of the case forming the cover (20) so as to actuate the high-speed breaking mechanism, and
    - a compression spring (50) opposing sliding of the push-button (30),
    characterized in that a free end of the tongue (45) is inserted in a first notch (15) of the case, and in that the two branches (46, 47) are inserted in a second notch (61) so as to subject the tongue (45) to a substantially longitudinal mechanical pre-stress,
    - the flexible conducting blade (40) being kept biased by the push-button (30) and the compression spring (50) by means of a stop (35) placed on the push-button (30) in the break position of the mini-switch, and
    - the conducting blade (40) being released from any biasing by the push-button (30) and the compression spring (50) when the mini-switch is in the make position.
  2. Electric mini-switch according to claim 1, characterized in that one of the ends of the flexible blade (40) is fixed and the other end is movable and provided with at least one contact.
  3. Electric mini-switch according to claim 1 or 2, characterized in that the push-button (30) passes through the recess separating the two branches (46, 47) of the flexible conducting blade (40).
  4. Electric mini-switch according to one of the foregoing claims, characterized in that one end of the compression spring (50) is housed in a recess of the push-button (30).
  5. Electric mini-switch according to one of the foregoing claims, characterized in that the flexible conducting blade (40) is pre-stressed between two notches (15, 61).
EP04354029A 2003-11-20 2004-09-06 Microswitch Expired - Lifetime EP1533823B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04354029T PL1533823T3 (en) 2003-11-20 2004-09-06 Microswitch

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0313600A FR2862809B1 (en) 2003-11-20 2003-11-20 MICROSWITCH
FR0313600 2003-11-20

Publications (2)

Publication Number Publication Date
EP1533823A1 EP1533823A1 (en) 2005-05-25
EP1533823B1 true EP1533823B1 (en) 2010-11-03

Family

ID=34430031

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04354029A Expired - Lifetime EP1533823B1 (en) 2003-11-20 2004-09-06 Microswitch

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US (1) US6998555B2 (en)
EP (1) EP1533823B1 (en)
CN (1) CN100456404C (en)
AT (1) ATE487228T1 (en)
BR (1) BRPI0405079B1 (en)
DE (1) DE602004029858D1 (en)
ES (1) ES2351122T3 (en)
FR (1) FR2862809B1 (en)
PL (1) PL1533823T3 (en)

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Also Published As

Publication number Publication date
BRPI0405079B1 (en) 2017-05-02
US6998555B2 (en) 2006-02-14
CN100456404C (en) 2009-01-28
ATE487228T1 (en) 2010-11-15
ES2351122T3 (en) 2011-01-31
CN1619734A (en) 2005-05-25
EP1533823A1 (en) 2005-05-25
BRPI0405079A (en) 2005-07-19
DE602004029858D1 (en) 2010-12-16
FR2862809B1 (en) 2006-03-10
US20050109601A1 (en) 2005-05-26
FR2862809A1 (en) 2005-05-27
PL1533823T3 (en) 2011-04-29

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