EP0678881A2 - Interrupteur à bouton-poussoir - Google Patents

Interrupteur à bouton-poussoir Download PDF

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Publication number
EP0678881A2
EP0678881A2 EP95105730A EP95105730A EP0678881A2 EP 0678881 A2 EP0678881 A2 EP 0678881A2 EP 95105730 A EP95105730 A EP 95105730A EP 95105730 A EP95105730 A EP 95105730A EP 0678881 A2 EP0678881 A2 EP 0678881A2
Authority
EP
European Patent Office
Prior art keywords
contact
spring
rocker
contact rocker
actuator
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.)
Withdrawn
Application number
EP95105730A
Other languages
German (de)
English (en)
Other versions
EP0678881A3 (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 EP0678881A2 publication Critical patent/EP0678881A2/fr
Publication of EP0678881A3 publication Critical patent/EP0678881A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/001—Means for preventing or breaking contact-welding
    • 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

Definitions

  • the invention relates to an electrical pushbutton switch with at least one contact point, each with at least one fixed contact and a movable contact designed as an assembly, which is designed as a contact rocker mounted by a first spring loaded in a rocker carrier and acted upon by a spring serving as a return spring Actuator is actuated.
  • Switching devices whose actuation is provided by means of a pushbutton or rocker switch are called pushbutton switches.
  • switches are understood to mean switching devices, the actuation of which leads to a specific switching position, which is only changed again by actuation.
  • buttons are used Designates switching devices that are used for short-term closing or opening of circuits, depending on whether they are used as open-circuit or closed-circuit current switches. With pushbuttons it is of great importance that their contacts automatically return to their starting position after the end of the actuation, ie after the actuating element has been released.
  • an electrical push button switch of the type mentioned which has a spring-loaded actuating element, which is used to actuate a contact rocker acted upon by a spring rocker.
  • the rocker spring is mounted in the switch base, while a rocker bracket fixed in the base with a round plug-in axis engages in a square recess provided for this purpose in the contact rocker for mounting 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.
  • a further disadvantage is that the large bearing friction in the contact system enables an undesired middle position of the contact rocker and incorrect contacting can occur as a result.
  • the movable contact being designed as an assembly which comprises a contact rocker, a first spring and a rocker carrier.
  • the movable contact is provided with at least one cutting edge bearing, and the contact rocker, together with the first spring, is inserted into the rocker carrier together with the first spring.
  • the characterizing features of claim 1 serve to solve this object. Thereafter, an actuator coupled to the actuating element is provided, which acts upon the contact rocker when actuated in the other switching position, provided that the reset of the contact rocker by the first spring is omitted.
  • the contact rocker and thus the arranged movable contact depending on the switching operation, swivels from one stable position to the other stable position by the action of the first spring or even welding the movable contact to the fixed contact, so that the actuating force applied by the first spring is not sufficient, to cause the contacts to separate.
  • the actuator provided according to the invention comes into engagement with the contact rocker and forces it by direct force to the intended pivoting movement in which the actuator coupled to the actuating element rests on the contact rocker at a suitable location for this.
  • the actuator is pivotally coupled to the actuating element and is thereby able to also perform the pivoting movement performed by the contact rocker when actuated.
  • the electrical pushbutton switch is designed as a monostable pushbutton, the actuating element and the actuator coupled to it always returning to its starting position, as is the contact rocker with the movable contacts.
  • a special embodiment of the invention provides that a third spring cooperates with the contact rocker and serves as a return spring for the contact rocker to support the pivoting back movement of the contact rocker, which is caused by the action of the first spring.
  • This third spring is arranged so that it accompanies in the switching path of the contact rocker and intervenes when necessary, namely when there is an unforeseen permanent contact z. B. comes as a result of jamming of the contact rocker.
  • the contact rocker is acted upon by the third spring in such a way that it lifts off the respective contact.
  • the contact rocker is provided with projections which are used to engage the third spring.
  • the push button switch is designed as a changeover switch with two fixed contacts between which the contact rocker can be moved, be it in the function of a switch or a button.
  • the contact point 12 consists of two fixed contacts 14, 16 and a contact rocker 18 with movable contacts 17, 19 arranged at its one free end.
  • the contact rocker 18 is actuated by an actuating element 20 which is articulated to an actuator 22.
  • the contact rocker 18 is urged against a rocker support 26 by a first spring 24, which can be seen here from the side and is designed as a leaf spring.
  • the first spring 24 is supported on the one hand against a holding frame 25 and on the other hand on the contact rocker 18.
  • the actuating element 20 is acted upon by a second spring, which serves as a return spring for the actuating element 20 and acts on it indirectly for this purpose, in that it rests on a flat surface 29 formed on the pivot axis 28 of the actuator 22, whereby the actuator always rests in the rest position occupies the same position, preferably a central position.
  • a second spring which serves as a return spring for the actuating element 20 and acts on it indirectly for this purpose, in that it rests on a flat surface 29 formed on the pivot axis 28 of the actuator 22, whereby the actuator always rests in the rest position occupies the same position, preferably a central position.
  • a third spring 32 which serves as a return spring for the contact rocker 18, is anchored to a base surface 30, which serves as the base for the holding frame 25 and for the rocker support 26 and on which the second spring 27 is also supported.
  • the contact rocker 18 is provided with a first projection 34, which is bordered above and below at a distance from a U-shaped part 33 of the third spring 32.
  • the actuator 22 When the actuating element 20 is actuated, the actuator 22 is moved downward and is seated with its groove 36 at the free end of the U-shaped projection 33 of the third spring 32. As a result, it is held there and pivots out of the central position up to a first stop 38 which is integrally formed on the actuating element 20. As the actuating element 20 moves further downward, the third spring 32, which is acted upon by the U-shaped projection 33 in the groove 36 of the actuator 32, is pressed against the projection 34 on the contact rocker 18. Here, the contact rocker 18 is taken from the upper switching position shown in FIGS.
  • the third spring 32 serving as a return spring for the contact rocker 18 is also relieved and resumes its starting position shown in FIGS. 1 and 2.
  • the contact rocker 18 is also in the by the positive engagement of its molding 34 with the U-shaped molding 33 of the third spring 32 1 and 2 pivoted original switching position.
  • the third spring 32 by engaging the projection 34 on the contact rocker 18, merely serves as an initiator for the respective switching operation of the contact rocker 18, which then independently reaches the desired switching position due to the force of the assigned first spring 24.
  • a disability by the third spring 32 or by the actuator is excluded, since the components used to actuate the contact rocker, namely the actuator 22 and the return spring 32 laterally next to the contact rocker 18, i. H. are arranged outside the pivoting path of the contact rocker 18.
  • the contact rocker 18 is in the mentioned position, for example in contact with the lower fixed contact piece 16.
  • the third spring 32 serving as a return spring presses against the molded part 34 on the contact rocker 18, but without the connection between the fixed contact piece 16 and the movable one To be able to solve contact piece 19.
  • the actuating element 20 with the actuator 22 coupled to it is in its initial position.
  • the actuator 22 is held in the central position due to the force exerted by the second spring 27. Between the Groove 38 of the actuator 22 and the return spring 32 is a distance, so that when the actuating element 20 is actuated, not the leg of the actuator 22 provided with the groove 38, but rather an opposing second leg 37 comes into engagement with the contact rocker 18 by this leg 37 strikes a second projection 35 arranged beyond the pivot point of the contact rocker 18 on this and acts upon the actuation element 20 further downward. As a result, due to the lever force thus introduced, the movable contact piece 19 is released from the lower fixed contact piece 16 and the contact rocker 18 pivots back into its starting position. In order to prevent the actuator 22 from swiveling around, a second stop 39 is formed on the actuating element 20 and cooperates with the actuator 22 in a form-fitting manner.

Landscapes

  • Push-Button Switches (AREA)
EP95105730A 1994-04-18 1995-04-18 Interrupteur à bouton-poussoir Withdrawn EP0678881A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19944413387 DE4413387C2 (de) 1994-04-18 1994-04-18 Elektrischer Tastschalter
DE4413387 1994-04-18

Publications (2)

Publication Number Publication Date
EP0678881A2 true EP0678881A2 (fr) 1995-10-25
EP0678881A3 EP0678881A3 (fr) 1997-12-10

Family

ID=6515736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95105730A Withdrawn EP0678881A3 (fr) 1994-04-18 1995-04-18 Interrupteur à bouton-poussoir

Country Status (2)

Country Link
EP (1) EP0678881A3 (fr)
DE (1) DE4413387C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8373860B2 (en) 2008-02-01 2013-02-12 Palo Alto Research Center Incorporated Transmitting/reflecting emanating light with time variation
US9029800B2 (en) 2011-08-09 2015-05-12 Palo Alto Research Center Incorporated Compact analyzer with spatial modulation and multiple intensity modulated excitation sources
US9638637B2 (en) 2007-01-26 2017-05-02 Palo Alto Research Center Incorporated Method and system implementing spatially modulated excitation or emission for particle characterization with enhanced sensitivity

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9164037B2 (en) 2007-01-26 2015-10-20 Palo Alto Research Center Incorporated Method and system for evaluation of signals received from spatially modulated excitation and emission to accurately determine particle positions and distances
US8629981B2 (en) 2008-02-01 2014-01-14 Palo Alto Research Center Incorporated Analyzers with time variation based on color-coded spatial modulation

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3491218A (en) * 1968-01-05 1970-01-20 Cutler Hammer Inc Pushbutton switch with pivotally mounted actuator
US4095070A (en) * 1976-12-27 1978-06-13 C & K Components, Inc. Miniature pushbutton switch
CH647093A5 (en) * 1979-12-27 1984-12-28 Feller Ag Electrical push-button switch
DE8123914U1 (de) * 1981-08-17 1981-12-10 Gira Elektrotechnische Industrie Gustav Giersiepen, 5608 Radevormwald "Elektrischer Tastschalter"
DE3133338A1 (de) * 1981-08-22 1983-03-10 Brown, Boveri & Cie Ag, 6800 Mannheim Elektrischer installationsschalter
DE3421021A1 (de) * 1984-06-06 1985-12-12 Fa. Albrecht Jung, 5885 Schalksmühle Stoessellagerung eines elektrischen tastschalters
DE3436967C2 (de) * 1984-10-09 1986-11-20 Leopold Kostal GmbH & Co KG, 5880 Lüdenscheid Elektrischer Schnappschalter
DE9305074U1 (de) * 1993-04-02 1993-06-09 Schaltbau AG, 8000 München Mikroschalter
DE4312307A1 (de) * 1993-04-15 1994-10-20 Abb Patent Gmbh Elektrischer Tastschalter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9638637B2 (en) 2007-01-26 2017-05-02 Palo Alto Research Center Incorporated Method and system implementing spatially modulated excitation or emission for particle characterization with enhanced sensitivity
US8373860B2 (en) 2008-02-01 2013-02-12 Palo Alto Research Center Incorporated Transmitting/reflecting emanating light with time variation
US9029800B2 (en) 2011-08-09 2015-05-12 Palo Alto Research Center Incorporated Compact analyzer with spatial modulation and multiple intensity modulated excitation sources

Also Published As

Publication number Publication date
DE4413387A1 (de) 1995-10-19
EP0678881A3 (fr) 1997-12-10
DE4413387C2 (de) 1996-11-07

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