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EP0620577B1 - Interrupteur à bouton-poussoir - Google Patents

Interrupteur à bouton-poussoir Download PDF

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Publication number
EP0620577B1
EP0620577B1 EP94105512A EP94105512A EP0620577B1 EP 0620577 B1 EP0620577 B1 EP 0620577B1 EP 94105512 A EP94105512 A EP 94105512A EP 94105512 A EP94105512 A EP 94105512A EP 0620577 B1 EP0620577 B1 EP 0620577B1
Authority
EP
European Patent Office
Prior art keywords
contact
rocker
spring
pushbutton switch
switch according
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
EP94105512A
Other languages
German (de)
English (en)
Other versions
EP0620577A1 (fr
Inventor
Michael Knorr
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.)
ABB Patent GmbH
Original Assignee
ABB Patent 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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0620577A1 publication Critical patent/EP0620577A1/fr
Application granted granted Critical
Publication of EP0620577B1 publication Critical patent/EP0620577B1/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
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5833—Electric connections to or between contacts; Terminals comprising an articulating, sliding or rolling contact between movable contact and terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5822—Flexible connections between movable contact and terminal
    • 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
    • H01H13/64—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 wherein the switch has more than two electrically distinguishable positions, e.g. multi-position push-button switches

Definitions

  • the invention relates to an electrical pushbutton switch with at least one contact point, each with at least one fixed contact and one movable contact, which is designed as a contact rocker acted upon by a first spring and can be actuated by an actuating element acted upon by a second spring.
  • Electrical pushbuttons are switching devices that are operated using a pushbutton or rocker switch. A distinction is also made between switches or buttons according to the switching process. Switching devices are referred to as switches, the actuation of which leads to a specific switching position which is only changed by actuation again. In contrast, buttons are used for short-term closing or opening of circuits, depending on whether they are designed as open-circuit or closed-circuit buttons. It is crucial for pushbuttons that after the end of actuation, d. H. after releasing the actuating element, automatically return to its starting position.
  • an electrical push button switch of the type mentioned which has a spring-loaded actuating element, which serves to actuate a contact rocker acted upon by a rocker spring.
  • the rocker spring is mounted in the switch base, while a rocker bracket attached to the base is used to support the contact rocker engages with a round thru axle in a square recess provided for this purpose in the contact rocker.
  • the resulting tolerance chains cause the switching point of the contact rocker to fluctuate over a wide range, which can ultimately lead to switching problems.
  • Another disadvantage is that the large bearing friction in the contact system enables the contact rocker to be in the center position, and incorrect contacting can thereby occur.
  • the movable contact is designed as an assembly which comprises the contact rocker, the first spring and a rocker support, and that the movable contact is provided with at least one cutting edge bearing, the contact rocker being preloaded together with the first spring in the Rocker bracket is used.
  • a bistable mounting of the contact rocker can be provided in order to enable the use of the electrical pushbutton switch as a pushbutton.
  • This pushbutton switch can be designed both as an open-circuit current switch and as a closed-circuit current switch. Accordingly, in a further development of the invention, one or the other switching position of the contact rocker or preferably both switching positions of the contact rocker is assigned a fixed contact, which ensures the aforementioned alternative option for the finished pushbutton switch.
  • a cutting edge bearing is provided between the contact rocker and the rocker support in such a way that a bearing socket is formed in the rocker support, into which the contact rocker engages with a correspondingly cut-out contact web.
  • the contact rocker again being provided with a cutting-like abutment which engages in a bearing socket arranged on the first spring.
  • a third embodiment according to the invention provides that a cutting edge bearing is provided between the first spring and the rocker support, a projection which is formed on the rocker support and serves as an abutment and which engages in a cutting-like projection in a bearing pan located on the first spring.
  • a cutting edge bearing according to the type described above is provided between the contact rocker and the first spring as well as between the contact rocker and the rocker carrier and between the rocker carrier and the first spring is provided, whereby the bearing friction between the relatively moving parts is reduced to a minimum.
  • the cutting edge bearing provided between the first spring and the rocker carrier is formed in that the projection formed on the rocker carrier and serving as a cutting edge is at an angle of approximately 45 ° with respect to that on the first spring Bearing pan is employed so that this projection forms the cutting edge with a longitudinal edge of its end face produced by the stamping process.
  • the first spring can be designed as a leaf spring
  • the second spring which acts on the actuating element as a return spring, is preferably designed as a helical spring.
  • the rocker support is advantageously provided for power supply, the power supply to the contact rocker being provided in each case via the bearing points. Should be for electrical reasons, e.g. B. if the current strength is too high to avoid excessive contact resistances, this simple solution variant is out of the question, so according to an alternative embodiment it is provided to provide the contact rocker with a flexible conductor piece, which is used for feeding the current.
  • the contact rocker For actuation by the actuating element, the contact rocker has at least one projection, which is coupled to the actuating element.
  • the type of coupling depends on whether the electrical push button switch according to the invention is to be used as a push button or as a switch.
  • the contact rocker When used as a pushbutton, there is a quasi-rigid coupling between the contact rocker and the actuating element, in that the pivoting of the contact rocker is roughly synchronized with the movement of the actuating element.
  • the first spring is used only for secure contact with the appropriate contact force.
  • the coupling between the actuating element and the contact rocker takes place exclusively in one direction, whereby instead of a rigid connecting member between the actuating element and the contact rocker, this is acted upon by a pendulum disk articulated on the actuating element.
  • a correspondingly coordinated shape of the pendulum disc and the contact rocker ensures that each time the actuating element is actuated, the contact rocker is acted upon by the pendulum disc in such a way that it assumes the respective other switching position, ie. H. After actuation twice, the contact rocker returns to its starting position.
  • the invention also offers the possibility of obtaining different actuation and contact forces in terms of thickness, width, shape and material by varying the configuration of the first spring, which is preferably used as a leaf spring, and thus adapting it to the electrical requirements.
  • the contact rocker as a stamped and bent part according to the invention, it is possible for it to be manufactured automatically and therefore cost-effectively.
  • the contact rocker 18 is inserted with the help of the rocker spring 22 together with this under prestress into the rocker carrier 20, the respective connection points being designed as a cutting edge bearing. Accordingly, the contact rocker 18 has a first projection 18.1, which has a sharp edge 18.2 with which it engages in a bearing pan 20.1 arranged on the rocker carrier 20. Furthermore, the contact rocker 18 has a second projection 18.3, which with the rocker spring 22 has a second cutting edge bearing forms. In order to prevent lateral deflection of the rocker spring 22 designed as a leaf spring, its ends are each provided with a recess 22.2 which is arranged symmetrically between two legs serving as bearing socket 22.1 and into which a recess 18.4 molded onto the molded part 18.3 engages.
  • the rocker support 20 is a U-shaped bent part with a lower leg which receives the bearing pan 20.1, a connecting web 20.2 and an upper leg 20.3, to which an extension 20.4 adjoins at an angle of approximately 45 °, the free end of which is similar to the second Formation 18.3 of the contact rocker 18.
  • the formation 20.4 on the rocker support 20 also serves as a cutting edge for a cutting edge bearing formed with the rocker spring 22, a bearing socket 22.1 being formed at the associated end of the rocker spring 22, into which the molding 20.4 engages as a cutting edge and with a nose-shaped
  • the projection also extends through the symmetrically arranged recess 22.2, as can be seen in FIG. 2.
  • the contact rocker 18 has two further projections 18.4 and 18.5, which cooperate with an actuator 24 designed as a pendulum disc, in that they can be acted upon alternately by the actuator 24.
  • the actuator 24 which is designed as an approximately triangular pendulum disk as shown in FIG. 3, is connected by means of a joint 26, for. B. film hinge, connected to an actuating element 30 acted upon by a return spring 28 and serves to actuate the contact rocker with the interposition of the projections 18.4, 18.5 so that it assumes the respective switching position. After each actuation, the actuating element 30 is returned to its starting position, which is shown in FIG. 2, by the return spring 20.
  • the actuator 24 has recesses 24.1, 24.2 which are formed in a manner known per se and which correspond to the projections 18.4, 18.5 and thereby ensure that the contact rocker 18 is always acted upon.
  • FIG. 3 The view of the contact arrangement 10 of the electrical push-button switch according to the invention shown in FIG. 3 corresponds to the section line III-III shown in FIG. With the exception of the details hidden by the details of the actuating element 30 shown in FIG. 3 and the actuator 24 designed as a pendulum disc, the further features correspond to the features recognizable from FIG. 1 and already explained. Accordingly, the same features are provided with the same reference numbers.
  • the essence of the present contact arrangement is that the cutting edge storage is realized in a cost-effective manner by observing the geometric conditions, eg. B. the inclination of the formation 20.4 at an inclination angle of approximately 45 ° or the formation 18.3 on the contact rocker 18, which in conjunction with the rectangular cutting edge of the punching ensure an effective cutting angle of approximately 45 °, which is sufficient for low-friction storage, a reliable function of the push button switch according to the invention is achieved.
  • the geometric conditions eg. B. the inclination of the formation 20.4 at an inclination angle of approximately 45 ° or the formation 18.3 on the contact rocker 18, which in conjunction with the rectangular cutting edge of the punching ensure an effective cutting angle of approximately 45 °, which is sufficient for low-friction storage, a reliable function of the push button switch according to the invention is achieved.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Push-Button Switches (AREA)
  • Switches With Compound Operations (AREA)

Claims (12)

  1. Interrupteur électrique à bouton poussoir comportant au moins un point de contact (10) avec au moins un contact (12, 14) fixe et un contact (16) mobile qui est agencé sous la forme d'une bascule de contact (18) sollicitée par un premier ressort (22) et qui peut être actionné à l'aide d'un élément d'actionnement (30) sollicité par un deuxième ressort (28) servant de ressort de rappel, caractérisé par le fait que le contact mobile (16) se présente sous la forme d'un ensemble de construction qui comprend la bascule de contact (18), le premier ressort (22) et un support de bascule (20), par le fait que le contact (16) mobile est pourvu d'au moins une articulation à couteau entre les pièces mobiles les unes par rapport aux autres et par le fait que la bascule de contact (18) peut être sollicitée au moyen d'un organes de commande (24) qui est lié avec possibilité de pivotement à l'élément d'actionnement (30), par l'intermédiaire d'ergots (18.4, 18.5) formés sur son bord latéral.
  2. Interrupteur électrique à bouton poussoir selon la revendication 1, caractérisé par le fait qu'il est prévu une articulation bistable de la bascule de contact (18).
  3. Interrupteur électrique à bouton poussoir selon la revendication 1 ou 2, caractérisé par le fait qu'il est prévu deux contacts fixes (12, 14) par point de contact (10), lesquels contacts fixes sont branchés de manière sélective.
  4. Interrupteur électrique à bouton poussoir selon une des revendications 1 à 3, caractérisé par le fait que l'articulation à couteau est prévue entre la bascule de contact (18) et le support de bascule (20).
  5. Interrupteur électrique à bouton poussoir selon une des revendications 1 à 3 ou selon la revendication 4, caractérisé par le fait que l'articulation à couteau est prévue entre la bascule de contact (18) et le premier ressort (12).
  6. Interrupteur électrique à bouton poussoir selon une des revendications 1 à 3 ou selon la revendication 4 ou 5, caractérisé par le fait que l'articulation à couteau est prévue entre le premier ressort (22) et le support de bascule (20).
  7. Interrupteur électrique à bouton poussoir selon les revendications 4 à 6, caractérisé par le fait que l'articulation à couteau est prévue aussi bien entre la bascule de contact (18) et le support de bascule (20) qu'entre le support de bascule (20) et le premier ressort (22) ainsi qu'entre la bascule de contact (18) et le premier ressort (22).
  8. Interrupteur électrique à bouton poussoir selon une des revendications précédentes, caractérisé par le fait que le premier ressort (22) est agencé sous forme de ressort à lame.
  9. Interrupteur électrique à bouton poussoir selon une des revendications précédentes, caractérisé par le fait que le deuxième ressort est agencé sous forme de ressort hélicoïdal de compression.
  10. Interrupteur électrique à bouton poussoir selon une des revendications précédentes, caractérisé par le fait que l'alimentation électrique du contact mobile (16) a lieu par l'intermédiaire du support de bascule en utilisant les points d'articulation de la bascule de contact (18).
  11. Interrupteur électrique à bouton poussoir selon une des revendications 1 à 9, caractérisé par le fait que l'alimentation électrique du contact mobile (16) a lieu à l'aide d'un tronçon de conducteur flexible relié à la bascule de contact (18).
  12. Interrupteur électrique à bouton poussoir selon une des revendications précédentes, caractérisé par le fait que l'articulation à couteau est formée d'un élément (20.1, 22.1) en forme de cuvette sur lequel la pièce (18.1, 18.3, 20.4) conjuguée prend appui par une arête rectiligne présentant un angle de 90° maximum, de préférence de 30°.
EP94105512A 1993-04-15 1994-04-09 Interrupteur à bouton-poussoir Expired - Lifetime EP0620577B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4312307 1993-04-15
DE4312307A DE4312307A1 (de) 1993-04-15 1993-04-15 Elektrischer Tastschalter

Publications (2)

Publication Number Publication Date
EP0620577A1 EP0620577A1 (fr) 1994-10-19
EP0620577B1 true EP0620577B1 (fr) 1997-06-11

Family

ID=6485529

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94105512A Expired - Lifetime EP0620577B1 (fr) 1993-04-15 1994-04-09 Interrupteur à bouton-poussoir

Country Status (5)

Country Link
EP (1) EP0620577B1 (fr)
AT (1) ATE154467T1 (fr)
DE (2) DE4312307A1 (fr)
ES (1) ES2105396T3 (fr)
GR (1) GR3024254T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4413387C2 (de) * 1994-04-18 1996-11-07 Abb Patent Gmbh Elektrischer Tastschalter
DE19530492B4 (de) * 1995-08-18 2005-08-04 Siemens Ag Bewegkontakt mit Schneidenlagerung
DE102004001939A1 (de) * 2004-01-14 2005-08-04 Abb Patent Gmbh Elektrisches Schaltgerät

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1580318A (fr) * 1968-05-30 1969-09-05
FR2033614A5 (fr) * 1969-02-26 1970-12-04 Develay Rene
DE7016357U (de) * 1970-04-30 1970-09-17 Merit Werk Merten & Co Kg Schalter.
DE2512225A1 (de) * 1975-03-20 1976-10-07 Rau Swf Autozubehoer Lenkstockschalter, insbesondere zur fahrtrichtungsanzeige bei kraftfahrzeugen
FR2435117A1 (fr) * 1978-09-01 1980-03-28 Seima Contacteur electrique
CH647093A5 (en) * 1979-12-27 1984-12-28 Feller Ag Electrical push-button switch
DE3133338A1 (de) * 1981-08-22 1983-03-10 Brown, Boveri & Cie Ag, 6800 Mannheim Elektrischer installationsschalter
DE3912798A1 (de) * 1989-04-19 1990-10-25 Jung Gmbh Albrecht Schaltmechanik fuer einen tastschalter

Also Published As

Publication number Publication date
GR3024254T3 (en) 1997-10-31
ES2105396T3 (es) 1997-10-16
ATE154467T1 (de) 1997-06-15
DE59403075D1 (de) 1997-07-17
DE4312307A1 (de) 1994-10-20
EP0620577A1 (fr) 1994-10-19

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