EP0493744B1 - Pullswitch - Google Patents

Pullswitch Download PDF

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Publication number
EP0493744B1
EP0493744B1 EP91121658A EP91121658A EP0493744B1 EP 0493744 B1 EP0493744 B1 EP 0493744B1 EP 91121658 A EP91121658 A EP 91121658A EP 91121658 A EP91121658 A EP 91121658A EP 0493744 B1 EP0493744 B1 EP 0493744B1
Authority
EP
European Patent Office
Prior art keywords
slide
housing
pendulum
pendulum plate
pull switch
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
EP91121658A
Other languages
German (de)
French (fr)
Other versions
EP0493744A1 (en
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 EP0493744A1 publication Critical patent/EP0493744A1/en
Application granted granted Critical
Publication of EP0493744B1 publication Critical patent/EP0493744B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H17/00Switches having flexible operating part adapted only for pulling, e.g. cord, chain
    • H01H17/16Switches having flexible operating part adapted only for pulling, e.g. cord, chain having a single flexible operating part adapted for pulling at one end only
    • H01H17/165Switches having flexible operating part adapted only for pulling, e.g. cord, chain having a single flexible operating part adapted for pulling at one end only secured to a part of the switch mechanism that has only rectilinear movement

Definitions

  • the invention relates to a pull switch with a housing and a slide, on which a pendulum disc loaded by a return spring is articulated, which serves to act on switching cams.
  • a pull switch of the type mentioned is known from DE-PS 19 05 030, in which the slide has a molded pin which is guided in an elongated hole which is arranged in a plate covering the housing base.
  • the switching contacts are actuated by the floating pendulum disc articulated on the slide by means of a film hinge and acted upon by a return spring, which acts upon a rotary cam when the slide is displaced longitudinally, which in turn moves the movable switch contacts acted upon.
  • the disadvantage here is that the pendulum disc maintains a one-sided preferred position, while the slide returns to its starting position after switching. In order to counteract this preferential position, the use of precisely machined, face-ground, set-resistant springs is necessary.
  • the pendulum disc has a link-like recess which is penetrated by a fixed pin and is thereby guided when the slide connected to the pendulum disc is actuated.
  • the fixed pin is arranged on the housing base, ie in the base part of the housing.
  • the base projects slightly beyond the pendulum disc inserted into the housing, so that the one above it Slider is kept at a distance from the pendulum disc. This ensures that the slide does not affect the pendulum disc in its movement.
  • a pull switch 10 is shown with a housing base 12, the cover, not shown, is removed, so that it is possible to look into the housing.
  • a movable contact piece 14 with snap bearing 15, which can be actuated by a centrally mounted rotatable switching arm with switching cams 16 arranged on both sides.
  • a pendulum disk 18, which is connected in one piece to a slide 20, is used to actuate the switching cams 16.
  • FIG. 2 shows a partial enlargement of a cross section along the section line A / B in FIG. 1, from which illustration further details regarding the subject matter of the invention emerge.
  • a recess 19 arranged in the pendulum disc 18 can be seen, which is penetrated by the pin 17, which is designed as an extension of a pivot pin for the switching arm with switching cams 16.
  • the end face of the guide pin 17 is convexly curved and ensures a distance between the pendulum disc 18 and the slide 20.
  • FIG. 3 shows the top view of an opened slide 20 with an integrally formed pendulum disk 18, which are connected to one another by means of two film hinges 26, 27.
  • a film hinge is understood to mean a local reduction in cross-section, which means that Angling of the adjoining parts of the slide 20 or the pendulum disc 18 is permitted, the axes of rotation of the film hinges 26, 27 being arranged offset by 90 ° to one another. This enables the pendulum disc 18 in the film hinge 26 to pivot freely horizontally, while the film hinge 27 makes it possible to pivot the pendulum disc vertically by 180 °, so that the pendulum disc 18 with the slide 20 come to lie one above the other, as in FIG Fig. 2 shown.
  • the recess 19 is arranged in the pendulum disc 18 symmetrically to the longitudinal axis of the unit formed from the pendulum disc 18 and slide 20.
  • the straightness the sliding path of the slide 20 is ensured by the holding pins 24 which engage in a corresponding slot-like recess in the cover of the housing base 10, not shown here.
  • an extension 28 which serves to receive and guide the return spring 21 shown in FIG. 1.
  • FIG. 4 shows a side view of the structural unit shown in FIG. 3, consisting of the pendulum disc 18 and the slide 20.

Landscapes

  • Oscillators With Electromechanical Resonators (AREA)
  • Electronic Switches (AREA)
  • Slide Switches (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Toys (AREA)
  • Push-Button Switches (AREA)

Abstract

The invention relates to a pull switch having a housing which is formed by a housing base (10) with a cover, and having a slide (20) on which a swinging disc (18), which is loaded by a restoring spring, is pivoted such that it can move and is used for acting on switching cams (16). In this case it is provided that the swinging disc (18) has a recess (19) like a slotted link through which a fixed-position peg (17) passes and is guided in this way during operation of the slide (20) which is connected to the swinging disc (18). <IMAGE>

Description

Die Erfindung betrifft einen Zugschalter mit einen Gehäuse und einem Schieber, an welchem eine von einer Rückstellfeder belastete Pendelscheibe beweglich angelenkt ist, die zur Beaufschlagung von Schaltnocken dient.The invention relates to a pull switch with a housing and a slide, on which a pendulum disc loaded by a return spring is articulated, which serves to act on switching cams.

Ein Zugschalter der eingangs genannten Art ist aus der DE-PS 19 05 030 bekannt, bei welcher der Schieber einen angeformten Zapfen aufweist, der in einem Langloch geführt ist, welches in einer den Gehäusesockel abdeckenden Platte angeordnet ist. Dabei erfolgt die Betätigung der Schaltkontakte durch die mittels Filmscharnier am Schieber angelenkte und von einer Rückstellfeder beaufschlagte fliegend gelagerte Pendelscheibe, die bei Längsverschiebung des Schiebers einen Drehnocken beaufschlagt, der seinerseits die beweglichen Schaltkontakte beaufschlagt. Nachteilig hierbei ist, daß die Pendelscheibe eine einseitige Vorzugslage beibehält, während der Schieber nach dem Schalten in seine Ausgangsstellung zurückkehrt. Um dieser Vorzugslage entgegenzuwirken, ist die Verwendung von exakt bearbeiteten, plangeschliffenen, setzfesten Federn erforderlich.A pull switch of the type mentioned is known from DE-PS 19 05 030, in which the slide has a molded pin which is guided in an elongated hole which is arranged in a plate covering the housing base. The switching contacts are actuated by the floating pendulum disc articulated on the slide by means of a film hinge and acted upon by a return spring, which acts upon a rotary cam when the slide is displaced longitudinally, which in turn moves the movable switch contacts acted upon. The disadvantage here is that the pendulum disc maintains a one-sided preferred position, while the slide returns to its starting position after switching. In order to counteract this preferential position, the use of precisely machined, face-ground, set-resistant springs is necessary.

Ein weiterer Nachteil besteht darin, daß der Schieber bei Beaufschlagung durch die an dem hierfür vorgesehenen Zapfen angreifende Zugschnur hierdurch ein Moment erfährt und auf die darunterliegende Pendelscheibe drückt, so daß diese in ihrer freien Bewegung beeinträchtigt ist und Fehlbetätigungen resultieren.Another disadvantage is that the slide experiences a moment when it is acted upon by the pull cord acting on the pin provided for this purpose and presses on the pendulum disc below it, so that its free movement is impaired and incorrect actuations result.

Ausgehend von diesem Stand der Technik ist es Aufgabe der Erfindung einen Zugschalter der eingangs genannten Art zu schaffen, der einfach aufgebaut und kostengünstig herstellbar ist und gleichzeitig eine sichere Schaltfunktion gewährleistet.Based on this prior art, it is an object of the invention to provide a pull switch of the type mentioned, which is simple in construction and inexpensive to manufacture and at the same time ensures a reliable switching function.

Diese Aufgabe wird erfindungsgemäß gelöst durch die Merkmale des Anspruchs 1. Danach ist vorgesehen, daß die Pendelscheibe eine kulissenartige Ausnehmung aufweist, welche von einem ortsfesten Zapfen durchgriffen ist und hierdurch bei Betätigung des mit der Pendelscheibe verbundenen Schiebers geführt ist.This object is achieved by the features of claim 1. It is provided that the pendulum disc has a link-like recess which is penetrated by a fixed pin and is thereby guided when the slide connected to the pendulum disc is actuated.

Gemäß der Erfindung ist der ortsfeste Zapfen am Gehäuseboden, d. h. im Sockelteil des Gehäuses angeordnet. Um eine Beeinflussung der Pendelscheibe durch den Schieber zu verhindern ist gemäß der Erfindung vorgesehen, daß der Sockel die in das Gehäuse eingelegte Pendelscheibe geringfügig überragt, so daß der darüber befindliche Schieber in Abstand zur Pendelscheibe gehalten ist. Hierdurch ist sichergestellt, daß der Schieber die Pendelscheibe in ihrem Bewegungsablauf nicht beeinträchtigt.According to the invention, the fixed pin is arranged on the housing base, ie in the base part of the housing. In order to prevent the pendulum disc from being influenced by the slide, it is provided according to the invention that the base projects slightly beyond the pendulum disc inserted into the housing, so that the one above it Slider is kept at a distance from the pendulum disc. This ensures that the slide does not affect the pendulum disc in its movement.

Ferner ist gemäß der Erfindung vorgesehen, das freie Ende des ortsfesten Zapfens ballig auszuführen, d. h. mit einer runden Kuppe zu versehen. Hierdurch wird die zwischen der Stirnfläche des Zapfens und der Schieberfläche auftretende Reibung stark vermindert, so daß eine einwandfreie Funktion des Schiebers gewährleistet ist.Furthermore, it is provided according to the invention to make the free end of the fixed pin spherical, i. H. to be provided with a round top. As a result, the friction occurring between the end face of the pin and the slide surface is greatly reduced, so that proper functioning of the slide is ensured.

Diese und weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen gekennzeichnet.These and further advantageous embodiments of the invention are characterized in the subclaims.

Anhand eines in der Zeichnung dargestellten Ausführungsbeispieles sollen die Erfindung, vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung näher erläutert und beschrieben werden.The invention, advantageous refinements and improvements of the invention are to be explained and described in more detail using an exemplary embodiment shown in the drawing.

Es zeigen:

Fig. 1
die Draufsicht auf einen geöffneten erfindungsgemäßen Zugschalter,
Fig. 2
eine vergrößerte Wiedergabe eines Längsschnitts entlang der Schnittlinie A/B,
Fig. 3
eine erfindungsgemäße Pendelscheibe mit einstückig angelenktem Schieber,
Fig. 4
eine Seitenansicht der in Fig. 3 gezeigten Darstellung.
Show it:
Fig. 1
the top view of an open pull switch according to the invention,
Fig. 2
an enlarged representation of a longitudinal section along the section line A / B,
Fig. 3
a pendulum disc according to the invention with one-piece articulated slide,
Fig. 4
a side view of the illustration shown in Fig. 3.

In Fig. 1 ist ein Zugschalter 10 mit einem Gehäusesockel 12 dargestellt, dessen nicht gezeigter Deckel abgenommen ist, so daß der Einblick in das Gehäuse möglich ist. Im einzelnen sind gezeigt; ein bewegliches Kontaktstück 14 mit Schnapplagerung 15, welches von einem mittig gelagerten drehbaren Schaltarm mit beiderseits angeordneten Schaltnocken 16 betätigbar ist. Zur Betätigung der Schaltnocken 16 dient eine Pendelscheibe 18, welche einstückig mit einem Schieber 20 verbunden ist. Auf der der Verbindung zum Schieber 20 abgewandten Seite der Pendelscheibe 18 greift eine Rückstellfeder 21 an, die sich in der Seitenwand des Gehäusesockels 12 abstützt. Auf der der Pendelscheibe 18 abgewandten Fläche des Schiebers 20 sind zwei zur Befestigung eines Zugglieds 22 dienende Haltezapfen 24, die an den Schieber 20 angeformt sind.In Fig. 1, a pull switch 10 is shown with a housing base 12, the cover, not shown, is removed, so that it is possible to look into the housing. In detail are shown; a movable contact piece 14 with snap bearing 15, which can be actuated by a centrally mounted rotatable switching arm with switching cams 16 arranged on both sides. A pendulum disk 18, which is connected in one piece to a slide 20, is used to actuate the switching cams 16. A return spring 21, which is supported in the side wall of the housing base 12, engages on the side of the pendulum disk 18 facing away from the connection to the slide 20. On the surface of the slide 20 facing away from the pendulum disc 18 there are two holding pins 24 which are used to fasten a tension member 22 and which are molded onto the slide 20.

In Fig. 2 ist die ausschnittweise Vergrößerung eines Querschnitts entlang der Schnittlinie A/B in Fig. 1 gezeigt, aus welcher Darstellung nähere Einzelheiten zum Gegenstand der Erfindung hervorgehen. Insbesondere ist eine in der Pendelscheibe 18 angeordnete Ausnehmung 19 zu erkennen, welche vom Zapfen 17 durchgriffen ist, welcher als Verlängerung eines Drehzapfens für den Schaltarm mit Schaltnocken 16 ausgebildet ist. Ferner ist aus Fig. 2 ersichtlich, daß die Stirnfläche des Führungszapfens 17 konvex gewölbt ist und einen Abstand zwischen der Pendelscheibe 18 und dem Schieber 20 gewährleistet.FIG. 2 shows a partial enlargement of a cross section along the section line A / B in FIG. 1, from which illustration further details regarding the subject matter of the invention emerge. In particular, a recess 19 arranged in the pendulum disc 18 can be seen, which is penetrated by the pin 17, which is designed as an extension of a pivot pin for the switching arm with switching cams 16. It can also be seen from FIG. 2 that the end face of the guide pin 17 is convexly curved and ensures a distance between the pendulum disc 18 and the slide 20.

In Fig. 3 ist die Draufsicht auf einen aufgeklappten Schieber 20 mit angeformter Pendelscheibe 18 gezeigt, welche mittels zweier Filmscharniere 26, 27 miteinander verbunden sind. Unter Filmscharnier wird hierbei eine örtliche Querschnittsverringerung verstanden, welche das Abwinkeln der hieran anschließenden Teile des Schiebers 20 bzw. der Pendelscheibe 18 gestattet, wobei die Drehachsen der Filmscharniere 26, 27 zueinander um 90° versetzt angeordnet sind. Hierdurch ist es ermöglicht, daß die Pendelscheibe 18 im Filmscharnier 26 horizontal frei schwenken kann, während das Filmscharnier 27 es ermöglicht, eine vertikale Schwenkung der Pendelscheibe um 180° vorzunehmen, so daß die Pendelscheibe 18 mit dem Schieber 20 übereinander zu liegen kommen, wie in Fig. 2 dargestellt.FIG. 3 shows the top view of an opened slide 20 with an integrally formed pendulum disk 18, which are connected to one another by means of two film hinges 26, 27. A film hinge is understood to mean a local reduction in cross-section, which means that Angling of the adjoining parts of the slide 20 or the pendulum disc 18 is permitted, the axes of rotation of the film hinges 26, 27 being arranged offset by 90 ° to one another. This enables the pendulum disc 18 in the film hinge 26 to pivot freely horizontally, while the film hinge 27 makes it possible to pivot the pendulum disc vertically by 180 °, so that the pendulum disc 18 with the slide 20 come to lie one above the other, as in FIG Fig. 2 shown.

Symmetrisch zur Längsachse der aus Pendelscheibe 18 und Schieber 20 gebildeten Einheit ist in der Pendelscheibe 18 die Ausnehmung 19 angeordnet. Hierbei bildet der Rand der Ausnehmung 19, der, wie aus den Figuren 1 und 2 ersichtlich, vom Zapfen 17 durchgriffen wird, gleichzeitig eine Begrenzung für den Schwenk- und Schiebeweg der Pendelscheibe 18 bei deren Betätigung in Folge gradlinigen Verschiebens des Schiebers 20. Die Gradlinigkeit des Schiebeweges des Schiebers 20 wird durch die Haltezapfen 24 sichergestellt, welche in eine entsprechende langlochartige Ausnehmung in dem hier nicht dargestellten Deckel des Gehäusesockels 10 greifen.The recess 19 is arranged in the pendulum disc 18 symmetrically to the longitudinal axis of the unit formed from the pendulum disc 18 and slide 20. The edge of the recess 19, which, as can be seen from FIGS. 1 and 2, is penetrated by the pin 17, at the same time forms a limitation for the pivoting and sliding path of the pendulum disc 18 when it is actuated as a result of the slide 20 being moved in a straight line. The straightness the sliding path of the slide 20 is ensured by the holding pins 24 which engage in a corresponding slot-like recess in the cover of the housing base 10, not shown here.

An dem dem Schieber 20 abgewandten Ende der Pendelscheibe 18 befindet sich ein Ansatz 28, welcher zur Aufnahme und Führung der aus Fig. 1 ersichtlichen Rückstellfeder 21 dient.At the end of the pendulum disc 18 facing away from the slide 20 there is an extension 28 which serves to receive and guide the return spring 21 shown in FIG. 1.

In Fig. 4 ist eine Seitenansicht der in Fig. 3 dargestellten aus der Pendelscheibe 18 und dem Schieber 20 gebildeten Baueinheit wiedergegeben.FIG. 4 shows a side view of the structural unit shown in FIG. 3, consisting of the pendulum disc 18 and the slide 20.

Claims (3)

  1. Pull switch having a housing which is formed from a housing base (12) and a housing lid, having a slide (20) to which a pendulum plate (18) is movably articulated which is loaded by a restoring spring (21) and serves to load operating cams (16), characterized in that the pendulum plate (18) has a link-like recess (19) through which a fixed pin (17) engages and which is thereby guided when the slide (20) which is connected to the pendulum plate (18) is actuated.
  2. Pull switch according to Claim 1, characterized in that the fixed pin (17) slightly projects above the pendulum plate (18) inserted in the housing base (12) , so that the slide (20) located above is held at a distance from the pendulum plate (18).
  3. Pull switch according to Claim 1 or 2, characterized in that the end surface on the free end of the fixed pin (17) is convexly domed.
EP91121658A 1990-12-29 1991-12-18 Pullswitch Expired - Lifetime EP0493744B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4042219 1990-12-29
DE4042219A DE4042219C1 (en) 1990-12-29 1990-12-29

Publications (2)

Publication Number Publication Date
EP0493744A1 EP0493744A1 (en) 1992-07-08
EP0493744B1 true EP0493744B1 (en) 1994-10-26

Family

ID=6421675

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91121658A Expired - Lifetime EP0493744B1 (en) 1990-12-29 1991-12-18 Pullswitch

Country Status (3)

Country Link
EP (1) EP0493744B1 (en)
AT (1) ATE113407T1 (en)
DE (2) DE4042219C1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19520239A1 (en) * 1995-06-02 1996-12-05 Abb Patent Gmbh Electrical switching device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1048979B (en) * 1954-11-15 1959-01-22 Jung Albrecht Fa Wall and ceiling pull switches
DE1158603B (en) * 1962-01-12 1963-12-05 Vedder Gmbh Geb Pull switch
DE1905030B2 (en) * 1969-02-01 1971-05-27 ELECTRIC PULL SWITCH
DE7519759U (en) * 1975-06-21 1975-10-16 Hochkoepper P & Co Electric pull switch

Also Published As

Publication number Publication date
DE4042219C1 (en) 1992-04-23
DE59103358D1 (en) 1994-12-01
ATE113407T1 (en) 1994-11-15
EP0493744A1 (en) 1992-07-08

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