EP0607567B1 - Commutateur à bouton-poussoir - Google Patents

Commutateur à bouton-poussoir Download PDF

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Publication number
EP0607567B1
EP0607567B1 EP93120041A EP93120041A EP0607567B1 EP 0607567 B1 EP0607567 B1 EP 0607567B1 EP 93120041 A EP93120041 A EP 93120041A EP 93120041 A EP93120041 A EP 93120041A EP 0607567 B1 EP0607567 B1 EP 0607567B1
Authority
EP
European Patent Office
Prior art keywords
snap
push
button switch
action plunger
plunger
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
EP93120041A
Other languages
German (de)
English (en)
Other versions
EP0607567A1 (fr
Inventor
Ulrich Dipl.-Ing. Brüggemann
Hans-Karl Heil
Gerhard Hochgesang
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.)
Preh GmbH
Original Assignee
Preh GmbH
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 Preh GmbH filed Critical Preh GmbH
Publication of EP0607567A1 publication Critical patent/EP0607567A1/fr
Application granted granted Critical
Publication of EP0607567B1 publication Critical patent/EP0607567B1/fr
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
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
    • H01H13/28—Snap-action arrangements depending upon deformation of elastic members using compression or extension of coil springs
    • H01H13/285—Snap-action arrangements depending upon deformation of elastic members using compression or extension of coil springs having a symmetrical configuration
    • 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
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
    • H01H13/56—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state upon the next application of operating force
    • H01H13/562—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state upon the next application of operating force making use of a heart shaped cam

Definitions

  • the invention relates to a push-button switch, in particular a power switch, with contacts fixed to the housing and at least one contact bridge which can be moved by means of a plunger, with a spring switching mechanism which is active between the plunger and a manually operable slide switch, and with a latching device for the slide switch, the slide switch being pressed in alternately goes into the on position and the off position.
  • Such switches are used to disconnect electrical devices from consumer electronics, in particular television sets.
  • Such a push button switch is known from DE-AS 1 590 503. It has been shown that, despite the snap switch, such pushbutton switches can be manipulated in an undesirable manner by means of the slide switch in such a way that the contact pressure is influenced. If the slide switch is not actuated sufficiently quickly in such pushbutton switches, that is to say it is pushed very slowly and / or only partially, it can occur despite the snap-action switching mechanism that the contact pressure with which the contact bridge is fixed to the housing Contacts, goes to zero and this state can be maintained manually. This results in an increase in contact resistance and consequently in contact heating. This is associated with increased contact wear. In addition, the pushbutton switch may overheat, which not only reduces its functionality or service life, but also forms a source of fire risk.
  • a pushbutton switch is known with a latching device which has a link and a latching finger engaging therein as latching parts.
  • a latching device which has a link and a latching finger engaging therein as latching parts.
  • one of the latching parts is held by a spring means so that it can escape.
  • the object of the invention is to propose a push button switch of the type mentioned, in which manual incorrect actuations can hardly lead to increased wear and to functional uncertainty.
  • the above object is achieved in a pushbutton switch of the type mentioned at the outset in that a friction surface pairing is provided between the plunger and a part fixed to the housing, and in that the friction surface pairing shortly before the snap action of the spring switch initiated by displacement of the slide switch leads to increased friction between the plunger and leads to the housing-fixed part and thereby delays the snap-in of the plunger.
  • the springs of the spring switch mechanism pass through their tensioned state when the slide switch moves. If the plunger begins to move, it is braked by the friction surface pairing before it reaches a point of transition, while the necessary contact pressure is maintained. The transition point is therefore only reached when the springs are in a stronger state of tension than without deliberate delay in the movement of the plunger before the point of change; the plunger also passes through the transition point more quickly. As a result, the changeover point and thus the contact pressure can hardly be influenced by incorrect actuation of the slide switch. There is therefore no danger that the slide switch is manipulated and / or blocked in positions in which an increased contact resistance or arc leads to overheating and the associated increased wear or to a source of fire hazards.
  • a further friction surface pairing is provided between the plunger and the part fixed to the housing. This allows the movement of the plunger to be braked before the contact bridge strikes the contacts fixed to the housing, as a result of which bouncing of the contacts is suppressed.
  • a housing (1) of the push button switch has a base part (2) and a cover part (3). Two pairs of contacts (4.5 and 6.7) are attached to the bottom part (2). A contact bridge (8.9) is assigned to each contact pair (4.5 or 6.7). It is a two-pole switch.
  • a plunger (10) is slidably mounted on the base part (2) in the direction of the longitudinal axis (L).
  • the plunger (10) has two chambers into which compression springs (11, 12) are inserted. These are supported on the one hand on a pin (13) of the chamber and on the other hand on the contact bridge (8 or 9).
  • the contact bridge (8 or 9) has an indentation (14).
  • the contact bridges (8, 9) protrude on both sides of the longitudinal axis (L) through openings (15) in the plunger (10) in which they have play.
  • a spring-elastic tongue (16) is formed on the plunger (10) and interacts with a hump (17) formed on the base part (2) in the manner described in more detail below.
  • a first slope (18) of the hump (17) and a first slope (19) of the tongue (16) form a first pair of friction surfaces.
  • a second slope (20) of the hump (17) and a second slope (21) of the tongue (16) form a second pair of friction surfaces (cf. FIG. 2, FIG. 4).
  • a slide switch (22) is slidably mounted in the direction of the longitudinal axis (L), which projects in the direction of the longitudinal axis (L) beyond the housing (1) and outside the housing (1) a receiving pin (23) for forms a push button, not shown.
  • An arm (24) is formed on both sides of the longitudinal axis (L) on the slide switch (22).
  • a compression spring (26) is arranged between each of the arms (24) and an extension (25) of the plunger (10). As a result, a snap switch is formed between the plunger (10) and the slide switch (22).
  • An approximately heart-shaped link (27) is formed on the slide switch (22) and is used to guide a locking lever (28).
  • the locking lever (28) engages with a hexagonal profile (29) in the link (27).
  • the locking lever (28) also has an extension (32) outside the base part (2) which engages in a compression spring (33) which is also the return spring (33) for the slide switch (22).
  • the return spring (33) lies in a chamber (34) of the slide switch (22) and is held in this by a projection (35).
  • the locking lever (28) has a bevel (36) on its side facing the return spring (33), so that the locking lever (28) tends to be mounted in the notch (30) with its pin (29) in a preferred direction pivot - in Fig. 1, 3 to the right -.
  • the push button switch described is easy to assemble by machine. For this purpose, all parts can be inserted from the same side (in FIG. 1 perpendicular to the plane of the drawing, in FIG. 2 from the right into the base part 2).
  • the springs described can also be used mechanically.
  • the cover part (3) is placed, which is shown in Figures 1, 3 only to the left of the longitudinal axis (L).
  • Pins (38) and pins (39) formed on ribs (37) engage in bores (40) of the base part (2).
  • a lower peripheral edge (41) of the base part (2) forms a support for a circuit board, not shown, with which the contacts (4 to 7) can be connected.
  • the contacts (4 to 7) are protected inside the edge (41) so that no particles can reach the contacts (4 to 7) from the outside.
  • the slide switch (22) is pressed against a stop (42) by means of the return spring (33).
  • the compression springs (26) are relatively relaxed and the plunger (10) is pressed by them against a stop (43).
  • the compression springs (11, 12) press the contact bridges (8, 9) against the edges (44) of the openings (15).
  • the contact bridges (8,9) are spaced from the contacts (4,5 or 6,7).
  • the slide switch (22) is moved in the push-in direction (E).
  • the link (27) moves with a guide section (47) relative to the pin (29) of the locking lever (28).
  • the compression springs (26) are tensioned, which go over their dead center.
  • the plunger (10) remains motionless.
  • the compression springs (26) act in the opposite direction, so that the plunger (10) is now accelerated against the direction of insertion (E).
  • the second slope (21) of the tongue (16) meets the second slope (20) of the hump (17), these slopes now abutting one another as friction surfaces.
  • the locking device namely the link (27) or the locking lever (28)
  • the link (27) takes the locking lever (28) in the direction of pull (Z). This is possible because the locking lever (28) is supported in this direction (Z) not on the housing (1), but on the slide switch (22) via the compression spring (33). The slide switch (22) is therefore free to move in the direction of pull (Z).
  • the slide switch (22) is actuated in the push-in direction (E).
  • the slide (27) moves relative to the pin (29) of the locking lever (28), so that the pin (29) the locking receptacle (45) under the action of the compression spring (33) pressing on the slope (36) in the direction of Arrow (A) leaves (see. Fig. 3).
  • the slide switch (22) meets an edge (46) of the base part (2 ).
  • the plunger (10) is stationary and held by the compression springs (26) so that its compression springs (11, 12) have the necessary contact pressure between the contact bridges (8.9) and the contacts (4.5 and 6.7 ) maintained.
  • the slide switch (22) is then released or slowly manipulated in an undesirable manner. In both cases it moves under the action of the return spring (33) in direction (Z).
  • the compression springs (26) stretch to their dead center. Shortly before reaching the dead center, the plunger (10) begins to move in the direction (E). Because of the free stroke (c) existing between the edges (44) and the contact bridges (8,9), the contact bridges (8,9) are not yet acted upon by the edges (44). Between the first slope (18) of the hump (17) and the first slope (19) of the tongue (16) there is a free stroke (d) in the switched-on position, which is smaller than the free stroke (c).
  • the bevels (18, 19) acting as friction surfaces therefore meet one another before the edges (44) act on the contact bridges (8, 9).
  • the friction surface pairing of the bevels (18, 19) means that the snap-in of the plunger (10) or the contact bridges (8, 9) is delayed.
  • the edges (44) of the plunger (10) only meet when the friction surfaces formed by the bevels (18, 19) have slid against one another, the spring-loaded tongue (16) pivoting and the tension state of the compression springs (26) increasing the contact bridges (8, 9), the bevels (18, 19) having separated from one another.
  • the contact bridges (8.9) suddenly snap off the contacts (4.5 or 6.7).
  • the push button switch then comes into the switch-off position shown in FIGS. 1 and 2.
  • the user can manipulate the slide switch (22) without being affected however, can bring the contact bridges into a state in which they are not in contact with the contacts (4.5 or 6.7). If the slide switch is manipulated, for example, into an intermediate position in which the bevels (18, 19) already lie against one another and the compression springs (26) are in the area of their dead center, this does not result in a dangerous increase in the contact resistance between the contact bridges (8, 9). and the contacts (4.5 or 6.7) and also not the risk of manipulable arcing.
  • the bevel (19) parallel to the bevel (18) and the bevel (21) parallel to the bevel (20) have different angles of inclination, which are adapted to the functions described.
  • the bevels (18, 19) are steeper than the bevels (20, 21) because the bevels (18, 19) serve to increase the effect of the springs (26) as energy stores and the bevels (20, 21) are only braking should work.
  • the tongue (16) is relieved both in the switched-on position and in the switched-off position - that is, for the longest time - and is only deflected during the switching. It is also possible to design the spring-loaded tongue (16) on the base part (2) and to provide the hump (17) on the plunger (10).
  • the pair of friction surfaces (18, 19; 20, 21) can also be designed so that they are not at an angle to the direction of insertion (E), but parallel to it.
  • a resilient element is not necessary in this case.
  • the surfaces leading to increased friction can then be designed with a corresponding surface structure.
  • the locking lever (28) is mounted in the base part (2). It is then supported in this by means of an additional spring, which enables it to be taken along when moving in the direction of pull (Z). In reverse of the conditions described, it is also possible to mount the locking lever (28) on the slide switch (22) and then to provide the link (27) on the base part (2). If the locking lever (28) does not leave the movement of the slide switch (22) free when pulling in the pulling direction (Z), the link (27) can instead be mounted such that it follows the movement of the locking lever (28) during such a movement.
  • FIG. This is used, for example, to display the respective switching state of the push button switch.

Landscapes

  • Push-Button Switches (AREA)
  • Switches With Compound Operations (AREA)

Claims (12)

  1. Interrupteur à bouton-poussoir, notamment principal, comportant des contacts (4-7) solidaires du boîtier, au moins une barrette de contact (8, 9) déplacée par un coulisseau (10) à déclic, un mécanisme de déclenchement (24, 25, 26) qui agit entre ce coulisseau (10) et un poussoir-commutateur (22) actionné manuellement et un dispositif d'encliquetage (27, 28) du poussoir (22), celui-ci passant alternativement à la position de fermeture et à la position d'ouverture quand il est enfoncé (E), interrupteur caractérisé en ce qu'il comporte un couple de surfaces de friction (18, 19) entre le coulisseau (10) et un élément (2, 17) solidaire du boîtier et que, peu avant le déclenchement du mécanisme de déclic (24, 25, 26) amorcé par le déplacement du poussoir (22), ces surfaces augmentent la friction entre le coulisseau (10) et l'élément (2, 17) solidaire du boîtier, en retardant ce déclenchement du coulisseau (10).
  2. Interrupteur à bouton-poussoir selon la revendication 1, caractérisé en ce que l'une des surfaces de friction est formée par une première rampe (18) de l'élément (17) solidaire du boîtier et l'autre surface de friction est formée par une première rampe (19) d'une languette (16) déformable élastiquement du coulisseau (10), ces premières rampes (18, 19) venant se toucher quand le coulisseau (10) passe de la position de fermeture à la position d'ouverture.
  3. Interrupteur à bouton-poussoir selon la revendication 1 ou 2, caractérisé en ce qu'un second couple (20, 21) de surfaces de friction, qui freine le déplacement du coulisseau (10) avant qu'il arrive à la position de fermeture, est disposé entre ce coulisseau (10) et l'élément (2, 17) solidaire du boîtier.
  4. Interrupteur à bouton-poussoir selon la revendication 3, caractérisé en ce que l'une des surfaces de friction de l'autre couple est formée par une seconde rampe (20) de l'élément (17) solidaire du boîtier et l'autre surface de friction de cet autre couple est formée sur une seconde rampe (21) d'une languette (16) déformable élastiquement du coulisseau (10), ces secondes rampes (20, 21) venant se toucher lorsque ce coulisseau passe de la position d'ouverture à la position de fermeture.
  5. Interrupteur à bouton-poussoir selon l'une des revendications précédentes, caractérisé en ce que la première rampe (18) et la seconde rampe (20) de l'élément (2) solidaire du boîtier sont formées des deux côtés d'un bossage (17) de cet élément (2) et la première rampe (19) et la seconde rampe (21) sont formées sur la même languette (19) du coulisseau (10).
  6. Interrupteur à bouton-poussoir selon l'une des revendications précédentes, caractérisé en ce que les surfaces de friction (18, 19) du premier couple freinent le coulisseau (10) plus énergiquement que les surfaces de friction (20, 21) du second couple.
  7. Interrupteur à bouton-poussoir selon la revendication 6, caractérisé en ce que les premières rampes (18, 19) sont plus raides que les secondes (20, 21).
  8. Interrupteur à bouton-poussoir selon l'une des revendications précédentes, caractérisé en ce que dans la position de fermeture et/ou dans la position d'ouverture du coulisseau (10), il existe un jeu (a) ou un écart (d), respectivement, entre les rampes (18, 19) d'une part, et (20, 21) d'autre part.
  9. Interrupteur à bouton-poussoir selon l'une des revendications précédentes, caractérisé en ce que, dans la position de fermeture du coulisseau (10), il existe un jeu (c) entre un flanc (44) d'un dégagement de ce coulisseau (10) et la barrette de contact (8, 9), ce flanc (44) faisant passer cette barrette (8, 9) de la position de fermeture à la position d'ouverture.
  10. Interrupteur à bouton-poussoir selon la revendication 9, caractérisé en ce que le jeu (c) est plus grand que l'écart (d) qui existe entre les rampes (18, 19) dans la position de fermeture.
  11. Interrupteur à bouton-poussoir selon l'une des revendications précédentes, caractérisé en ce que la barrette de contact (8, 9) est soutenue sur le coulisseau (10) par un ressort (11, 12).
  12. Interrupteur à bouton-poussoir selon l'une des revendications précédentes, caractérisé en ce que les éléments du dispositif d'encliquetage sont une coulisse (27) et un levier (28) qui y est engagé et que, lorsque le poussoir (22) est soumis à une contrainte manuelle dans le sens (Z) de traction opposé au sens (E) d'enfoncement, ces deux éléments d'encliquetage (27, 28) en prise laissent ce poussoir (22) se déplacer librement dans le sens (Z) de traction.
EP93120041A 1993-01-19 1993-12-13 Commutateur à bouton-poussoir Expired - Lifetime EP0607567B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4301192A DE4301192C1 (de) 1993-01-19 1993-01-19 Drucktastenschalter
DE4301192 1993-01-19

Publications (2)

Publication Number Publication Date
EP0607567A1 EP0607567A1 (fr) 1994-07-27
EP0607567B1 true EP0607567B1 (fr) 1995-12-06

Family

ID=6478423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93120041A Expired - Lifetime EP0607567B1 (fr) 1993-01-19 1993-12-13 Commutateur à bouton-poussoir

Country Status (5)

Country Link
US (1) US5360954A (fr)
EP (1) EP0607567B1 (fr)
JP (1) JPH06283079A (fr)
DE (1) DE4301192C1 (fr)
ES (1) ES2080573T3 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4428285C1 (de) * 1994-08-10 1995-07-06 Preh Elektro Feinmechanik Drucktastenschalter
JP3718576B2 (ja) * 1997-03-21 2005-11-24 アルプス電気株式会社 プッシュスイッチ
DE29802820U1 (de) * 1998-02-18 1998-04-16 Kopp Heinrich Ag Vorrichtung für das Ein- und Ausschalten eines Elektromotors, insbesondere eines Elektrowerkzeugs
DE19833171C1 (de) * 1998-07-23 1999-11-25 Preh Elektro Feinmechanik Elektrischer Druckschalter
DE29915053U1 (de) * 1999-08-27 1999-12-16 DREEFS GmbH Schaltgeräte und Systeme, 96364 Marktrodach Drucktastenschalter für Anlaufstrombegrenzung
US6784390B2 (en) * 2002-08-30 2004-08-31 Defond Manufacturing Limited Electrical switch
JP4280144B2 (ja) * 2003-10-21 2009-06-17 株式会社ニフコ スイッチ付ラッチ
EP1801827B1 (fr) * 2005-12-20 2008-08-20 Siemens Aktiengesellschaft Dispositif avec un système de commande et un élément de commutation
WO2018204997A1 (fr) * 2017-05-08 2018-11-15 Weg Drives & Controls- Automação Ltda. Clé électrique à action rapide et procédé de montage de clé électrique à action rapide
CN110752127B (zh) * 2019-10-24 2022-03-08 闽江学院 一种断路器用内部线路固定结构
CN111463035A (zh) * 2020-04-17 2020-07-28 杭州乐垚生物科技有限公司 一种安全性能高稳定性好的基因工程装置

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US2918544A (en) * 1957-07-02 1959-12-22 Cutler Hammer Inc Snap switches
DE1590503B1 (de) * 1966-12-09 1970-11-19 Schoeller & Co Elektrotech Drucktastenschalter mit Momentsprungwerk
DE2031364C3 (de) * 1970-06-25 1975-02-27 J. & J. Marquardt, 7201 Rietheim Schnappschalter
DE2839108C3 (de) * 1978-09-08 1981-10-22 Rudolf Schadow Gmbh, 1000 Berlin Drucktasten-Schnappschalter
DE3150046C2 (de) * 1981-12-17 1984-05-10 Wilhelm Ruf KG, 8000 München Elektrischer Schiebeschalter
GB2120014B (en) * 1982-04-30 1985-10-02 Lucas Ind Plc Electrical switch
JPS5996722U (ja) * 1982-12-20 1984-06-30 星電器製造株式会社 小型スイツチ
CH665051A5 (en) * 1984-05-16 1988-04-15 Uniswitch Ag Push button electrical switch e.g. microswitch - has symmetrical contact arms and housing acting on deformation element for respective bias springs
DE3644437C1 (en) * 1986-12-24 1988-05-11 Kostal Leopold Gmbh & Co Kg Electrical push-button switch
DE9101126U1 (de) * 1991-02-01 1992-06-04 Klöckner-Moeller GmbH, 53115 Bonn Schaltgerät mit Sprungverhalten
US5280148A (en) * 1992-11-06 1994-01-18 Honeywell Inc. Mechanism with damper to prevent overtravel upon sudden release

Also Published As

Publication number Publication date
EP0607567A1 (fr) 1994-07-27
ES2080573T3 (es) 1996-02-01
US5360954A (en) 1994-11-01
JPH06283079A (ja) 1994-10-07
DE4301192C1 (de) 1994-02-03

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