EP0174382B1 - Variable switchbox for a motor (protective) circuit-breaking switch and undervoltage release to be mounted in electric tools or the like - Google Patents

Variable switchbox for a motor (protective) circuit-breaking switch and undervoltage release to be mounted in electric tools or the like Download PDF

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Publication number
EP0174382B1
EP0174382B1 EP84110803A EP84110803A EP0174382B1 EP 0174382 B1 EP0174382 B1 EP 0174382B1 EP 84110803 A EP84110803 A EP 84110803A EP 84110803 A EP84110803 A EP 84110803A EP 0174382 B1 EP0174382 B1 EP 0174382B1
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EP
European Patent Office
Prior art keywords
switch
housing
motor
switch box
switching
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
Application number
EP84110803A
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German (de)
French (fr)
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EP0174382A1 (en
Inventor
Peter Flohr
Jürgen Herr
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.)
Heinrich Kopp GmbH and Co KG
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Heinrich Kopp GmbH and Co KG
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 Heinrich Kopp GmbH and Co KG filed Critical Heinrich Kopp GmbH and Co KG
Priority to EP84110803A priority Critical patent/EP0174382B1/en
Priority to AT84110803T priority patent/ATE36776T1/en
Priority to PCT/EP1984/000276 priority patent/WO1986001936A1/en
Priority to DE8484110803T priority patent/DE3473682D1/en
Publication of EP0174382A1 publication Critical patent/EP0174382A1/en
Priority to DK216886A priority patent/DK216886D0/en
Application granted granted Critical
Publication of EP0174382B1 publication Critical patent/EP0174382B1/en
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/12—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by voltage falling below a predetermined value, e.g. for no-volt protection

Definitions

  • the invention relates to a variable switch box for installation in power tools or similar devices in order to incorporate as a control element the conventional motor switch or the motor protection switch provided with protection against overload and to be able to assign an arrangement for undervoltage release to one of these switching elements as required or to retrofit or retrofit the existing switch box.
  • US-A-3 315 190 shows a multi-pole switching device which can be switched on and off manually by means of two actuating buttons via a latching mechanism, on which an electromagnet can act to trigger and inactivate, with which the presence of the operating voltage is monitored.
  • this is a special switching device in which the devices in question are inseparable from one another, even if there is no need at all for undervoltage tripping.
  • the object of the invention is to develop a control box as an operating element for installation in existing power tools or devices, which, according to the arrangement and functionally, enables a conventional motor switch or a motor protection switch to be supplemented in a simple manner with a device for undervoltage release and to be able to combine.
  • the (different) equipment of the switch box should be realizable from the outset, retrospectively or alternatively in the manner of a modular system and essentially using already existing or easily retrofittable devices.
  • the invention forms an expandable switch box for power tools or the like according to the preamble of claim 1 according to the features specified in the characterizing part thereof.
  • the execution of a multi-pole motor protection switch known from DE-PS 19 09 555 with thermal overcurrent tripping, without its switching latching and locking device, can be assigned to the undervoltage monitoring, and this can be associated with the electromagnetic triggering element fed from the AC supply network via a rectifier bridge circuit Compilation by means of a functional coupling by means of the latching mechanism contained in the switch box by means of two actuation buttons, manually switched on and off, and electrically triggered and secured.
  • the compilation can also be done with a simple motor switch instead of the motor protection switch; viewed in itself, it is even operational without the installation of the arrangement for undervoltage release.
  • the switch box according to the invention can be varied and / or supplemented, as it were, in a modular manner, in exchange for the previous control element of an electrical appliance, as required or expedient.
  • claim 2 relates to the specific design of the lever member as a central element of the actuating and latching mechanism, claim 3 to the spatial-constructive design of the entire switch box, claim 4 to useful measures for dust and splash water protection of the construction, and Claim 5 to the mounting arrangements on the switch box for secure mounting within the electrical device in question.
  • the power supply of the device-side electric motor is switched to two poles by actuation of the motor protection switch 1 and the device is at the same time thermally secured against overload.
  • the two switching paths are bridged at their terminals against one another by the interference suppression capacitor 2 and on the other hand by the rectifier arrangement 3 in a single-phase bridge circuit for exciting or supplying the electromagnetic release element 4 for the mains voltage control.
  • the motor protection switch and the release element 4 interact in mutual coupling via an actuating and latching mechanism 5, which is simply indicated in the circuit diagram by a dashed active connection line.
  • the completion of the switch-on process by the motor-protective circuit breaker 1 requires the presence of the mains voltage in order to enable the release mechanism 4 to be activated at all due to the simultaneous excitation of the release element 4 in the effect on the mechanism 5 mentioned, and the control element in question does not become ineffective after its manual release to let the switch-off position return.
  • an inadmissible drop or the complete failure of the mains voltage when the device is switched on and the switch-off actuation is inadvertently omitted, causing the trigger element 4 to drop. This triggers the latching of the mechanism 5, allows the motor protection switch 1 to return to the switch-off position and, in the manner described above, prevents it from being switched on until mains voltage is present again.
  • the switch box consists of a one-sided open insulating material housing 6 in the form of a parallelepiped, on the operator side of which, within a trough-shaped front panel, the broad actuation handles as the switch button 7 and the switch button 8 are adjustably inserted and mounted in housing sockets, and which is on the side below in front of a strain relief device 9 is provided with insertion openings for the connection cable as for the motor cable.
  • the actuating and latching mechanism 5 cooperating with the above-mentioned functional elements 1 and 4 essentially consists of the elongated L-shaped lever member 11.
  • this lever member 11 has on the side of the switch button 7 for frictional engagement on the compression spring-loaded actuation button of the motor protection switch 1 via a switch cam 12, by means of which the lever member 11 is pressed upwards in the off position against a housing stop 13 provided below the switch button 7.
  • the lever member 11 is given a torque with an effect on its opposite bearing end, through which the switch-off button 8 is pulled towards the further housing stop 13 ′ formed by the end edge of its guide bush and at the same time the hinged armature 10 of the release member 4 via the coupling piece 16 is kept in the waste position.
  • the lever member 11 has, in addition to the switching cam 12 arranged laterally offset to the pivot bearing point for the switch 7 in the other direction, offset a latching cam 14 which is rigidly angled upwards by 90 ° and provided with a grinding or evasive profile along the side, which in the course of Under certain conditions, the switch-on actuation is able to hold positively on the edge of a housing projection 15 in order to hold the motor protection switch 1 in the switch-on position after manual release of the switch button 7.
  • the unlatching spring 17 used in connection with the arrangement for undervoltage release causes a counter-component in terms of pressure, which - again in itself - corresponds to an actuation of the switch-off and thus prevents the completion of the latching process, provided that this moment does not occur Side of the additional device is counteracted in a suitable manner.
  • the lever member 11 in question it extends from a bend downward to the right next to the pivot bearing point for the push pin of the switch-off button 8 de Coupling piece 16 is provided, which engages by means of a T-web in the hinged armature 10 of the release member 4.
  • the unlatching spring 17 presses the lever member 11 loaded by it into the switch-off position defined by the housing stop 13 'and, at the same time, the hinged armature 10 against its own weight in the release position, this possibly being opposite the yoke leg of the electromagnet (4) on a special one Housing stop (13 ").
  • the latching cam 14 can then, and only then, hold positively on the edge of the housing projection 15 when the mechanically relieved of the coupling piece 16 of the lever member 11 and, as a result, preparing for the magnetic yoke by reducing the air gap Electromagnet 4 tilted hinged armature 10 is tightened and held by its network-side excitation. This creates a counterforce by which the switch-off torque of the unlatching spring 17 is canceled, whereby the torque imparted to the lever member 11 by the return spring of the motor-protective circuit breaker 1 comes into effect and allows the positive locking between the latching cam 14 and its housing projection 15 to take place in a previously described manner.
  • the hinged armature 10 is unable or no longer able to hold onto the magnetic yoke of the electromagnet 4, whereupon the unlatching spring 17 comes into effect again, releases the latching and the lever member 11 of the mechanism in the above-described effect on the functional elements controlled by it can return to the off position.
  • the manual actuation of the switch-off button 8 gives the lever member 11, in support of the forces of the tensioned unlatching spring 17 and the return spring of the motor protection switch 1 and against the holding force of the electromagnet 4, a resulting torque which removes its positive locking and the overall arrangement in this way can return to the off position.
  • the excitation of the release element 4 causes its hinged armature 10 to hold onto the magnetic yoke and thereby compensate for the influence of the unlatching spring 17, so that when the switch 7 that was previously fully pressed in by hand is released under pressure of the operated motor protection switch on the mechanics (5) the entire arrangement is latched in the on position.
  • the switch button 8 which is mechanically coupled to the switch button 7, has noticeably emerged from the front of the housing 6 of the switch box and is therefore available for switching off when required. This switch-off takes place by means of a slight push of the switch-off button 8, where the mechanism releases the motor protection switch 1 and the trigger element 4, and the switch box is then ready for switching on again.
  • the insulating material housing 6, which is open on one side, can be closed dust-tight after the assembly, wiring and storage of the interference-suppression capacitor 2, which is only indicated by dash-dotted lines, by means of a cover, which is also not particularly shown in the drawing, for which purpose several flaps are angled away from its edge are to lock elastically with corresponding approaches of the side walls of the housing 6.
  • the two actuating buttons 7 and 8 are arranged to be largely splash-proof within recesses of the front panel by nesting overlap of the guide bushings for their pressure pins on the part of the button edge drawn in downwards.
  • the switch box for holding it below a rectangular mounting opening of the electrical device in question finally has two latching spring tongues 18 molded onto the two opposite outer sides of the housing 6, which in cooperation with a Randunas flange on the front plate sufficiently overlapping this opening in a simple manner se and allow the safe assembly and easy disassembly of the switch box without the aid of additional fasteners.

Description

Die Erfindung bezieht sich auf eine variable Schaltbox zum Einbau in Elektrowerkzeuge oder ähnliche Vorrichtungen, um als Bedienungselement den gebräuchlichen Motorschalter oder den zum Schutz gegen Überlastung mit einer thermischen Auslösung versehenen Motorschutzschalter in sich aufzunehmen und einem dieser Schaltorgane nach Bedarf eine Anordnung zur Unterspannungsauslösung beiordnen zu können bzw. die vorhandene Schaltbox beliebig um- oder nachzurüsten.The invention relates to a variable switch box for installation in power tools or similar devices in order to incorporate as a control element the conventional motor switch or the motor protection switch provided with protection against overload and to be able to assign an arrangement for undervoltage release to one of these switching elements as required or to retrofit or retrofit the existing switch box.

Während es sich besonders für von Hand benutzte Elektrowerkzeuge bei dem Motor(schutz)-schalter um das eigentliche Betätigungselement handelt, erweist es sich hierbei und in vergleichbaren Anwendungsfällen von Nutzen, darüber hinaus eine geeignete Vorkehrung zu treffen, die es verhindert, dass nach einem Stromausfall oder Leitungsdefekt ein versehentlich eingeschaltet verbliebenes Elektrogerät dieser Art, wie z. B. eine Handbohrmaschine oder ein elektrischer Rasenmäher, sebständig wieder anläuft und dabei möglicherweise Verletzungen und erheblichen Sachschaden anrichtet.While the motor (circuit breaker) switch is the actual actuating element, particularly for power tools used by hand, it proves to be useful here and in comparable applications to also take suitable precautions to prevent it from occurring after a power failure or line defect an inadvertently switched on electrical device of this type, such as. B. a hand drill or an electric lawn mower, starts up again automatically and possibly causes injuries and significant damage to property.

Derartiges lässt sich mit Sicherheit durch eine bekannte Schaltungsanordnung zur Unterspannungsauslösung verhindern, die als solche das Vorhandensein der Betriebsspanung überwacht und bei deren funktionswidrigem Absinken bzw. einem vollständigen Ausfall nicht nur das betriebene Elektrogerät allpolig abschaltet, sondern auch dessen erneute Wiedereinschaltung unterbindet und auf keinen Fall anders als von Hand zulässt. Bei einer derartigen Zusatzeinrichtung handelt es sich mithin um ein zwar in praxi erlässliches, jedoch umbedingt nützliches Funktionselement, für dessen Einsatz allerdings ein gewisser Platzbedarf und zusätzlicher Kostenaufwand erforderlich sind. Diese Überlegungen standen bisher einer breiteren oder sogar grundsätzlichen Anwendung mehr oder weniger hinderlich im Wege.Such can be prevented with certainty by a known circuit arrangement for undervoltage release, which as such monitors the presence of the operating voltage and, in the event of its functionally falling or a complete failure, not only switches off the operated electrical device at all poles, but also prevents it from being switched on again and in no way differently than allowed by hand. Such an additional device is therefore a functional element which is necessary in practice but is absolutely useful, but the use of which requires a certain amount of space and additional cost. Until now, these considerations have been more or less a hindrance to broader or even fundamental application.

Andererseits ist auch schon versucht worden, die Zusatzeinrichtung zur Unterspannungsauslösung gehäuseeinheitlich mit einer elektrischen Schalteinrichtung zusammenzubauen und beide Teile funktionell zu kombinieren. In dieser Beziehung zeigt die US-A-3 315 190 eine mehrpolige Schaltvorrichtung, die von Hand mittels zweier Betätigungsknöpfe über eine Verklinkungsmechanik ein- und ausschaltbar ist, auf welche ein Elektromagnet auslösend und inaktivierend einzuwirken vermag, mit dem das Vorhandensein der Betriebsspannung überwacht wird. Hierbei handelt es sich jedoch um ein besonderes Schaltgerät, bei dem die betreffenden Einrichtungen untrennbar miteinander verbunden sind, selbst wenn gegebenenfalls für eine Unterspannungsauslösung gar kein Bedarf vorhanden ist.On the other hand, attempts have also already been made to assemble the additional device for undervoltage release in the same housing as an electrical switching device and to functionally combine the two parts. In this regard, US-A-3 315 190 shows a multi-pole switching device which can be switched on and off manually by means of two actuating buttons via a latching mechanism, on which an electromagnet can act to trigger and inactivate, with which the presence of the operating voltage is monitored. However, this is a special switching device in which the devices in question are inseparable from one another, even if there is no need at all for undervoltage tripping.

In Anbetracht dessen liegt der Erfindung die Aufgabe zugrunde, als Bedienungselement zum Einbau in vorhandene Elektrowerkzeuge oder-geräte eine Schaltbox zu entwickeln, die es anordnungsgemäss und funktionell ermöglicht, in sich einen gebräuchlichen Motorschalter oder einen Motorschutzschalter auf einfache Weise mit einer Vorrichtung zur Unterspannungsauslösung ergänzen und kombinieren zu können. - Dabei soll die (unterschiedliche) Ausstattung der Schaltbox von vornherein, nachträglich oder alternativ nach Art eines Baukastensystems und im wesentlichen unter Verwendung bereits vorhandener bzw. einfach nachrüstbarer Einrichtungen realisierbar sein.In view of this, the object of the invention is to develop a control box as an operating element for installation in existing power tools or devices, which, according to the arrangement and functionally, enables a conventional motor switch or a motor protection switch to be supplemented in a simple manner with a device for undervoltage release and to be able to combine. - The (different) equipment of the switch box should be realizable from the outset, retrospectively or alternatively in the manner of a modular system and essentially using already existing or easily retrofittable devices.

Zur Lösung dieser Aufgabe bildet die Erfindung eine ausbaufähige Schaltbox für Elektrowerkzeuge od. dgl. nach dem Oberbegriff des Patentanspruchs 1 gemäss den in dessen Kennzeichenteil angegebenen Merkmalen aus.To achieve this object, the invention forms an expandable switch box for power tools or the like according to the preamble of claim 1 according to the features specified in the characterizing part thereof.

Somit kann beispielsweise der Ausführung eines aus der DE-PS 19 09 555 bekannten mehrpoligen Motorschutzschalters mit thermischer Überstromauslösung unter Verzicht auf dessen Schaltverrastung und Feststellvorrichtung das über eine Gleichrichter-Brückenschaltung aus dem Wechselstrom-Versorgungsnetz gespeiste elektromagnetische Auslöseorgan der Unterspannungs- überwachung beigeordnet werden, und diese Zusammenstellung über eine funktionelle Verkopplung durch die von der Schaltbox beinhaltete Verklinkungsmechanik mittels zweier Betätigungsknöpfe von Hand ein- und ausgeschaltet, sowie elektrisch ausgelöst und gesichert werden. Dabei kann die Zusammenstellung anstelle des Motorschutzschalters auch mit einem einfachen Motorschalter erfolgen; sie ist für sich betrachtet sogar schon ohne den Einbau der Anordnung zur Unterspannungsauslösung betriebsfähig. Auf diese Weise lässt sich die erfindungsgemässe Schaltbox im Austausch gegen das bisherige Bedienungsorgan eines Elektrogeräts nach Bedarf oder Zweckmässigkeit gleichsam baukastenartig variieren und/oder ergänzen.Thus, for example, the execution of a multi-pole motor protection switch known from DE-PS 19 09 555 with thermal overcurrent tripping, without its switching latching and locking device, can be assigned to the undervoltage monitoring, and this can be associated with the electromagnetic triggering element fed from the AC supply network via a rectifier bridge circuit Compilation by means of a functional coupling by means of the latching mechanism contained in the switch box by means of two actuation buttons, manually switched on and off, and electrically triggered and secured. The compilation can also be done with a simple motor switch instead of the motor protection switch; viewed in itself, it is even operational without the installation of the arrangement for undervoltage release. In this way, the switch box according to the invention can be varied and / or supplemented, as it were, in a modular manner, in exchange for the previous control element of an electrical appliance, as required or expedient.

Die weiteren Merkmale des in Anspruch 1 gekennzeichneten Erfindungsgenenstandes sind als vorteilhafte Weiterbildungen desselben aus den nachgeordneten abhängigen Ansprüchen 2 bis 5 ersichtlich. Demgemäss bezieht sich der Anspruch 2 auf die spezifische Ausbildung des Hebelgliedes als zentrales Element der Betätigungs- und Verklinkungsmechanik, der Anspruch 3 auf die räumlich-konstruktive Ausbildung der gesamten Schaltbox, der Anspruch 4 auf zweckvolle Massnahmen zum Staub- und Spritzwasserschutz der Bauausführung, und der Anspruch 5 auf die Montagevorkehrungen an der Schaltbox zur sicheren Halterung innerhalb des betreffenden Elektrogeräts.The further features of the subject matter of the invention characterized in claim 1 can be seen as advantageous developments of the same from the subordinate dependent claims 2 to 5. Accordingly, claim 2 relates to the specific design of the lever member as a central element of the actuating and latching mechanism, claim 3 to the spatial-constructive design of the entire switch box, claim 4 to useful measures for dust and splash water protection of the construction, and Claim 5 to the mounting arrangements on the switch box for secure mounting within the electrical device in question.

In der anliegende Zeichnung ist ein typisches Ausführungsbeispiel der Erfindung dargestellt. Dabei zeigen:

  • Fig. 1 den Stromlaufplan der von einer Schaltpox komplett beinhalteten (Schutz-)Schalt- und Auslöseorgane in vereinfachter Form;
  • Fig. 2 die mit einem thermisch gesicherten Motorschutzschalter und einer Unterspannungsauslösung bestückte Schaltbox in der Ausschaltstellung; und
  • Fig. 3 dieselbe Schaltbox in der Einschaltstellung, jeweils im vergrösserten Massstab 2 : 1.
A typical embodiment of the invention is shown in the accompanying drawing. Show:
  • 1 shows the circuit diagram of the (protective) switching and triggering elements completely contained by a switching box in a simplified form;
  • 2 shows the switch box equipped with a thermally protected motor protection switch and an undervoltage release in the off position; and
  • Fig. 3 the same switch box in the on position, each on an enlarged scale 2: 1.

Wie aus dem Stromlaufplan nach Fig. 1 der Zeichnung hervorgeht, wird die Stromversorgung des geräteseitigen Elektromotors durch Betätigung des Motorschutzschalters 1 jeweils zweipolig geschaltet und das Gerät zugleich thermisch gegen Überlastung gesichert. Darüber hinaus sind die beiden Schaltstrecken an ihren Anschlussklemmen gegeneinander einmal durch den Entstörkondensator 2 und zum anderen durch die Gleichrichteranordnung 3 in einphasiger Brückenschaltung zur Erregung bzw. Speisung des elektromagnetischen Auslöseorgans 4 für die Netzspannungskontrolle überbrückt. Dabei wirken der Motorschutzschalter und das Aulöseorgan 4 in gegenseitiger Verkopplung über eine Betätigungs- und Verklinkungsmechanik 5 zusammen, was in dem Stromlaufplan einfacherweise durch eine gestrichelte Wirkverbindungslinie angedeutet ist. Insofern setzt der Vollzug des Einschaltvorgangs durch den Motorschutzschalter 1 zwingend das Vorhandensein der Netzspannung voraus, um zufolge der gleichzeitigen Erregung des Auslöseorgans 4 in der Wirkung auf die genannte Mechanik 5 überhaupt deren Einschaltverklinkung zu ermöglichen und das betreffende Bedienungselement nach dessen manueller Freigabe nicht wirkungslos wieder in die Ausschaltstellung zurückkehren zu lassen. Andererseits bewirkt ein unzulässiges Absinken bzw. der vollständige Ausfall der Netzspannung bei eingeschaltetem Gerät und versehentlich unterbliebener Ausschaltbetätigung, dass das Auslöseorgan 4 zum Abfall gelangt. Damit löst die Verklinkung der Mechanik 5 aus, lässt den Motorschutzschalter 1 in die Ausschaltstellung zurückkehren und verhindert auf vorbeschriebene Weise dessen Einschaltmölichkeit, bis wieder Netzspannung vorhanden ist.As can be seen from the circuit diagram according to FIG. 1 of the drawing, the power supply of the device-side electric motor is switched to two poles by actuation of the motor protection switch 1 and the device is at the same time thermally secured against overload. In addition, the two switching paths are bridged at their terminals against one another by the interference suppression capacitor 2 and on the other hand by the rectifier arrangement 3 in a single-phase bridge circuit for exciting or supplying the electromagnetic release element 4 for the mains voltage control. The motor protection switch and the release element 4 interact in mutual coupling via an actuating and latching mechanism 5, which is simply indicated in the circuit diagram by a dashed active connection line. In this respect, the completion of the switch-on process by the motor-protective circuit breaker 1 requires the presence of the mains voltage in order to enable the release mechanism 4 to be activated at all due to the simultaneous excitation of the release element 4 in the effect on the mechanism 5 mentioned, and the control element in question does not become ineffective after its manual release to let the switch-off position return. On the other hand, an inadmissible drop or the complete failure of the mains voltage when the device is switched on and the switch-off actuation is inadvertently omitted, causing the trigger element 4 to drop. This triggers the latching of the mechanism 5, allows the motor protection switch 1 to return to the switch-off position and, in the manner described above, prevents it from being switched on until mains voltage is present again.

Aufbau und Funktion einer dementsprechend konstruierten Schaltbox sind aus den Fig. 2 und 3 der Zeichnung ersichtlich. Danach besteht die Schaltbox aus einem einseitig offenen Isolierstoffgehäuse 6 in Form eines Parallelepipeds, an welchem bedienungsseitig innerhalb einer wannenartig ausgeformten Frontplatte die breit angelegten Betätigungshandhaben als Einschaltknopf 7 und als Ausschaltknopf 8 verstellbar eingelassen und in Gehäusebuchsen geführt gelagert sind, und welches an seiner unten gelegenen Seite vor einer Zugentlastungseinrichtung 9 mit Einführungsöffnungen für das Anschlusskabel wie für das Motorkabel versehen ist.Structure and function of a switch box constructed accordingly are shown in FIGS. 2 and 3 of the drawing. Thereafter, the switch box consists of a one-sided open insulating material housing 6 in the form of a parallelepiped, on the operator side of which, within a trough-shaped front panel, the broad actuation handles as the switch button 7 and the switch button 8 are adjustably inserted and mounted in housing sockets, and which is on the side below in front of a strain relief device 9 is provided with insertion openings for the connection cable as for the motor cable.

Des weiteren sind in das innenseitig mit einem entsprechenden Halterungs- bzw. Montageprofil versehene Gehäuse 6 räumlich unterhalb der Betätigungs- und Verklinkungsmechanik (5) so wie eng nebeneinander der bereits vorhandene, sauber auf eine blosse Tastbetätigung umgestellte Motorschutzschalter 1 und das über einen freibeweglichen Klappanker 10 verfügende elektromagnetische Auslöseorgan 4 für die Netzspannungskontrolle samt angelöteter Gleichrichteranordnung 3 einfach als vorgefertigte Bauteile eingesetzt. Gemäss der Erfindung besteht die mit den genannten Funktionselementen 1 und 4 zusamnmenwirkende Betätigungs- und Verklinkungsmechanik 5 im wesentlichen aus dem langgestreckt L-förmigen Hebelglied 11. Dasselbe ist im Bereich seiner beiden Eckpunkte jeweils an den Enden der mit hinreichendem Spiel in dem Gehäuse 6 geführten Druckzapfen der Ein- und Ausschaltknöpfe 7 und 8 drehgelenkig gelagert, ohne deren gegenseitige Verstellbarkeit zu beeinträchtigen. Ausserdem verfügt dieses Hebelglied 11 auf seiten des Einschaltknopfes 7 zur kraftschlüssigen Anlage auf der in sich druckfederbelasteten Betätigungstaste des Motorschutzschalters 1 über einen Schaltnocken 12, durch welchen das Hebelglied 11 in der Ausschaltstellung nach oben gegen einen unterhalb des Einschaltknopfes 7 vorgesehenen Gehäuseanschlag 13 gedrückt wird. Infolgedessen wird dem Hebelglied 11 in dieser Phase ein Drehmoment mit Wirkung auf sein entgegengesetztes Lagerende zuteil, durch welches der Ausschaltknopf 8 gegend den von der Abschlussrandung seiner Führungsbuchse gebildeten weiteren Gehäuseanschlag 13' gezogen und zur gleichen Zeit der Klappanker 10 des Auslöseorgans 4 über das Kopplungsstück 16 in der Abfallstellung gehalten wird. Ferner besitzt das Hebelglied 11 neben dem seitlich versetzt zu der Drehlagerstelle für den Einschaltknopf 7 angeordneten Schaltnokken 12 in der anderen Richtung versetzt einen um 90° nach oben hin starr abgewinkelten sowie längsseits mit einem Schleif- oder Ausweichprofil versehenen Verklinkungsnocken 14, der sich im Zuge der Einschaltbetätigung unter bestimmten Voraussetzungen formschlüssig an der Kante eines Gehäusevorsprungs 15 zu halten vermag, um den Motorschutzschalter 1 nach manueller Entlastung des Einschaltknopfes 7 in der Einschaltstellung zu halten. Für diesen Effekt sind - zunächst unter Vernachlässigung der mechanisch-funktionellen Vorkehrungen zur Unterspannungsauslösung gesehen - zwei entgegengesetzte Drehmomente verantwortlich, von denen das eine den Ausschaltknopf 8 in seine Ausschaltstellung sieht, während ihn das andere bei Betätigung des Einschaltknopfes 7 begrenzt in Gegenrichtung bewegt und zugleich den Verklinkungsnocken 14 unter den Gehäusevorsprung 15 drückt und damit das Hebelglied 11 in der Wirkung auf den eingeschalteten Motorschutzschalter 1 arretiert, worauf an der Aussenseite der Schaltbox auch noch eine dafür typische Knopfstellung hinweist.Furthermore, inside the housing 6, which is provided with a corresponding mounting or mounting profile, is spatially below the actuating and latching mechanism (5), as well as closely next to one another, the already existing motor protection switch 1, which has been converted cleanly to a mere push-button actuation, and that via a freely movable hinged anchor 10 having electromagnetic trigger element 4 for the mains voltage control together with the soldered rectifier arrangement 3 simply used as prefabricated components. According to the invention, the actuating and latching mechanism 5 cooperating with the above-mentioned functional elements 1 and 4 essentially consists of the elongated L-shaped lever member 11. The same is in the region of its two corner points in each case at the ends of the pressure pins guided in the housing 6 with sufficient play the on and off buttons 7 and 8 are pivoted without impairing their mutual adjustability. In addition, this lever member 11 has on the side of the switch button 7 for frictional engagement on the compression spring-loaded actuation button of the motor protection switch 1 via a switch cam 12, by means of which the lever member 11 is pressed upwards in the off position against a housing stop 13 provided below the switch button 7. As a result, in this phase, the lever member 11 is given a torque with an effect on its opposite bearing end, through which the switch-off button 8 is pulled towards the further housing stop 13 ′ formed by the end edge of its guide bush and at the same time the hinged armature 10 of the release member 4 via the coupling piece 16 is kept in the waste position. Furthermore, the lever member 11 has, in addition to the switching cam 12 arranged laterally offset to the pivot bearing point for the switch 7 in the other direction, offset a latching cam 14 which is rigidly angled upwards by 90 ° and provided with a grinding or evasive profile along the side, which in the course of Under certain conditions, the switch-on actuation is able to hold positively on the edge of a housing projection 15 in order to hold the motor protection switch 1 in the switch-on position after manual release of the switch button 7. For this effect - initially neglecting the mechanical-functional precautions for undervoltage release - two opposite torques are responsible, one of which sees the switch button 8 in its switch-off position, while the other moves it to a limited extent in the opposite direction when the switch button 7 is actuated and at the same time the Verklinkungsnocken 14 presses under the housing projection 15 and thus locks the lever member 11 in the effect on the activated motor protection switch 1, which also indicates a typical button position on the outside of the switch box.

Auf der anderen Seite bewirkt die im Zusammenhang mit der Anordnung zur Unterspannungsauslösung in die Schaltbox eingesetzte Entklinkungsfeder 17 druckmässig eine Gegenkomponente, die - wiederum für sich betrachtet - zunächst einer Ausschaltbetätigung entspricht und somit dem Vollzug des Verklinkungsvorgangs aufhebend im Wege steht, sofern diesem Moment nicht von Seiten der Zusatzeinrichtung auf geeignete Weise entgegengewirkt wird. Für diesen Zweck ist an dem betreffenden Ende des Hebelglieds 11 das von einer Abwinklung rechts neben der Drehlagerstelle für den Druckzapfen des Ausschaltknopfes 8 schwenkfähig nach unten reichende Kopplungsstück 16 vorgesehen, welches mittels eines T-Steges in den Klappanker 10 des Auslöseorgans 4 eingreift. Demgemäss drückt die Entklinkungsfeder 17 das von ihr belastete Hebelglied 11 in die durch den Gehäuseanschlag 13' definierte Ausschaltstellung und zur gleichen Zeit den Klappanker 10 entgegen seinem Eigengewicht in die Auslöseposition, wobei sich dieser ggf. dem Jochschenkel des Elektromagneten (4) gegenüber an einem besonderen Gehäuseanschlag (13") an- leg_en kann.On the other hand, the unlatching spring 17 used in connection with the arrangement for undervoltage release causes a counter-component in terms of pressure, which - again in itself - corresponds to an actuation of the switch-off and thus prevents the completion of the latching process, provided that this moment does not occur Side of the additional device is counteracted in a suitable manner. For this purpose, at the end of the lever member 11 in question, it extends from a bend downward to the right next to the pivot bearing point for the push pin of the switch-off button 8 de Coupling piece 16 is provided, which engages by means of a T-web in the hinged armature 10 of the release member 4. Accordingly, the unlatching spring 17 presses the lever member 11 loaded by it into the switch-off position defined by the housing stop 13 'and, at the same time, the hinged armature 10 against its own weight in the release position, this possibly being opposite the yoke leg of the electromagnet (4) on a special one Housing stop (13 ").

Im Verlauf der Einschaltbetätigung vermag sich demgemäss der Verklinkungsnocken 14 dann, und nur dann, an der Kante des Gehäusevorsprungs 15 formschlüssig zu halten, wenn der dabei mechanisch von dem Kopplungsstück 16 des Hebelglieds 11 entlastete und infolge dessen unter Verringerung des Luftspalts vorbereitend auf das Magnetjoch des Elektromagneten 4 gekippte Klappanker 10 durch dessen netzseitige Erregung fest angezogen und gehalten wird. Dadurch entsteht eine Gegenkraft, durch die das Ausschaltmoment der Entklinkungsfeder 17 aufgehoben wird, womit wiederum das dem Hebelglied 11 von Seiten der Rückstellfeder des Motorschutzschalters 1 vermittelte Drehmoment zur Wirkung gelangt und auf vorbeschriebene Weise den Formschluss zwischen dem Verklinkungsnokken 14 und seinem Gehäusevorsprung 15 zustandekommen lässt. Bei nicht vorhandener Netzspannung wie genauso bei deren Ausfall während des Betriebs vermag sich der Klappanker 10 nicht bzw. nicht mehr am Magnetjoch des Elektromagneten 4 zu halten, worauf jetzt wieder die Entklinkungsfeder 17 zur Wirkung gelangt, die Verklinkung aufhebt und das Hebelglied 11 der Mechanik in der vorbeschriebenen Wirkung auf die von ihm gesteuerten Funktionselemente in die Ausschaltstellung zurückkehren lässt. Dagegen wird durch die manuelle Betätigung des Ausschaltknopfes 8 dem Hebelglied 11 in Unterstützung durch die Kräfte der gespannten Entklinkungsfeder 17 und der Rückstellfeder des Motorschutzschalters 1 sowie entgegen der Haltekraft des Elektromagneten 4 ein resultierendes Drehmoment vermittelt, welches seine formschlüssige Verklinkung aufhebt und die Gesamtanordnung auf diese Weise wieder in die Ausschaltstellung zurückkehren lässt.In the course of the switch-on operation, the latching cam 14 can then, and only then, hold positively on the edge of the housing projection 15 when the mechanically relieved of the coupling piece 16 of the lever member 11 and, as a result, preparing for the magnetic yoke by reducing the air gap Electromagnet 4 tilted hinged armature 10 is tightened and held by its network-side excitation. This creates a counterforce by which the switch-off torque of the unlatching spring 17 is canceled, whereby the torque imparted to the lever member 11 by the return spring of the motor-protective circuit breaker 1 comes into effect and allows the positive locking between the latching cam 14 and its housing projection 15 to take place in a previously described manner. If the mains voltage is not present, as is the case when it fails during operation, the hinged armature 10 is unable or no longer able to hold onto the magnetic yoke of the electromagnet 4, whereupon the unlatching spring 17 comes into effect again, releases the latching and the lever member 11 of the mechanism in the above-described effect on the functional elements controlled by it can return to the off position. In contrast, the manual actuation of the switch-off button 8 gives the lever member 11, in support of the forces of the tensioned unlatching spring 17 and the return spring of the motor protection switch 1 and against the holding force of the electromagnet 4, a resulting torque which removes its positive locking and the overall arrangement in this way can return to the off position.

Die Arbeitsweise dieser verschiedenen Einrichtungen der erfindungsgemässen Schaltbox betreffend, bewirkt demnach eine manuelle Druckbetätigung des Einschaltknopfes 7 die Einschaltbetätigung des zweipoligen Motorschutzschalters 1 und dabei zur gleichen Zeit über die vorhandene Betätigungs- und Verklinkungsmechanik (5) der Schaltbox auf seiten des hierbei erst an Spannung geschalteten elektromagnetischen Auslöseorgans 4 ein vorbereitendes Umlegen des Klappankers 10 in dessen Halteposition. - Wenn jetzt z. B. keine Netzspannung vorhanden ist, führen nach Freigabe des Einschaltknopfes 7 die Rückstellfeder des Motorschutzschalters 1 und die Entklinkungsfeder 17 der Mechanik (5) die Gesamtanordnung ohne den Verriegelungseffekt ergebnislos wieder in die Ausschaltstellung zurück. - Bei vorhandener Netzspannung bewirkt dagegen die Erregung des Auslöseorgans 4, dass sich dessen Klappanker 10 an dem Magnetjoch hält und dadurch den Einfluss der Entklinkungsfeder 17 kompensiert, so dass bei Freigabe des zuvor von Hand voll eingedrückten Einschaltknopfes 7 unter Druck des betätigten Motorschutzschalters auf die Mechanik (5) die Verklinkung der Gesamtanordnung in der Einschaltstellung erfolgt. Bei diesem Vorgang ist auch noch der mit dem Einschaltknopf 7 mechanisch verkoppelte Ausschaltknopf 8 frontseitig spürbar aus dem Gehäuse 6 der Schaltbox hervorgetreten und steht damit bei Bedarf zur Ausschaltung bereit. Diese Ausschaltung erfolgt vermittels einer leichten Druckbetätigung des Ausschaltknopfes 8, wo durch die Mechanik entklinkt wird, hiermit der Motorschutzschalter 1 und das Auslöseorgan 4 ausgeschaltet werden und danach die Schaltbox zur erneuten Einschaltung bereitsteht. - Fällt indessen im Betriebszustand des Elektrogeräts einmal unversehens die Netzspannung erheblich ab oder gar vollends aus, so hat dies zur Folge, dass nicht nur das angeschlossene Gerät, sondern auch das elektromagnetische Auslöseorgan 4 innerhalb seiner Schaltbox stromlos werden. Demgemäss kann jetzt die vorher gespannte Entklinkungsfeder 17 den nicht mehr an seinem Magnetjoch gehaltenen Klappanker 10 abwerfen und die damit einhergehende Entklinkung der Mechanik (5) auch den Motorschutzschalter 1 entlasten und diesen in die Ausschaltstellung zurückfedern lassen. Auf diese Weise ist sichergestellt, dass nach der Beseitigung einer solchen Netz-oder Leitungsstörung für die erneute Inbetriebnahme des mit der erfindungsgemässen Schaltbox ausgerüsteten Elektrogeräts zwangsläufig der Einschaltvorgang wiederholt werden muss, was einen anderenfalls möglichen Bedienungsfehler mit seinen Folgen auf vorteilhafte Weise ausschliesst.The operation of these various devices of the switch box according to the invention accordingly results in a manual pressure actuation of the switch button 7, the switch-on actuation of the two-pole motor protection switch 1 and at the same time via the existing actuating and latching mechanism (5) of the switch box on the part of the electromagnetic switch which is only switched on in this case Trigger 4 a preparatory flipping of the hinged anchor 10 in its holding position. - If z. B. there is no mains voltage, after the release of the switch 7, the return spring of the motor protection switch 1 and the unlatching spring 17 of the mechanism (5) return the entire arrangement without the locking effect without result in the off position. - If the mains voltage is present, on the other hand, the excitation of the release element 4 causes its hinged armature 10 to hold onto the magnetic yoke and thereby compensate for the influence of the unlatching spring 17, so that when the switch 7 that was previously fully pressed in by hand is released under pressure of the operated motor protection switch on the mechanics (5) the entire arrangement is latched in the on position. During this process, the switch button 8, which is mechanically coupled to the switch button 7, has noticeably emerged from the front of the housing 6 of the switch box and is therefore available for switching off when required. This switch-off takes place by means of a slight push of the switch-off button 8, where the mechanism releases the motor protection switch 1 and the trigger element 4, and the switch box is then ready for switching on again. - If, however, in the operating state of the electrical device, the mains voltage suddenly drops considerably or even completely, this has the consequence that not only the connected device, but also the electromagnetic release element 4 within its switch box become currentless. Accordingly, the previously tensioned unlatching spring 17 can now throw off the hinged armature 10, which is no longer held on its magnetic yoke, and the associated unlatching of the mechanism (5) can also relieve the motor protection switch 1 and allow it to spring back into the off position. In this way it is ensured that after the elimination of such a network or line fault for the renewed start-up of the electrical device equipped with the switch box according to the invention, the switch-on process must inevitably be repeated, which advantageously precludes an otherwise possible operating error and its consequences.

In bezug auf die dementsprechende Ausstattung und Bauform der Schaltbox lässt sich das einseitig offene Isolierstoffgehäuse 6 nach der Montage, Verdrahtung und Einlagerung des nur strichpunktiert angedeuteten Entstörkondensators 2 durch einen in der Zeichnung ebenfalls nicht besonders dargestellten Deckel staubdicht verschliessen, wozu von dessen Nutrandung mehrere Laschen abgewinkelt sind, um mit entsprechenden Ansätzen der Seitenwandungen des Gehäuses 6 elastisch zu verrasten. Des weiteren sind die beiden Betätigungsknöpfe 7 und 8 durch ein verschachtelndes Überlappen der Führungsbuchsen für ihre Druckzapfen seitens der nach unten eingezogenen Knopfrandung weitgehend spritzwassergeschützt innerhalb von Ausnehmungen der Frontplatte angeordnet. Ausserdem verfügt die Schaltbox zu ihrer Halterung unterhalb einer rechteckigen Montageöffnung des betreffenden Elektrogeräts schliesslich noch an zwei sich gegenüberliegenden Aussenseiten des Gehäuses 6 über je eine demselben angeformte Rastfederzunge 18, die im Zusammenwirken mit einem diese Öffnung ausreichend überlappenden Randunasflansch an der Frontplatte auf einfache Weise und ohne die Zuhilfenahme weiterer Befestigungselemente eine sichere Montage und einfache Demontierbarkeit der Schaltbox ermöglichen.With regard to the corresponding equipment and design of the switch box, the insulating material housing 6, which is open on one side, can be closed dust-tight after the assembly, wiring and storage of the interference-suppression capacitor 2, which is only indicated by dash-dotted lines, by means of a cover, which is also not particularly shown in the drawing, for which purpose several flaps are angled away from its edge are to lock elastically with corresponding approaches of the side walls of the housing 6. Furthermore, the two actuating buttons 7 and 8 are arranged to be largely splash-proof within recesses of the front panel by nesting overlap of the guide bushings for their pressure pins on the part of the button edge drawn in downwards. In addition, the switch box for holding it below a rectangular mounting opening of the electrical device in question finally has two latching spring tongues 18 molded onto the two opposite outer sides of the housing 6, which in cooperation with a Randunas flange on the front plate sufficiently overlapping this opening in a simple manner se and allow the safe assembly and easy disassembly of the switch box without the aid of additional fasteners.

Claims (5)

1. Detachable switch box, more especially for electric tools, having a respective operating knob (7,8) for manually switching on or off, which knobs extend parallel to each other internally of an insulating material housing (6) for the switch box and are interconnected via an interlocking mechanism (5), wherein an installation chamber for an electromagnet (4) for releasing lowtension voltage is also provided, the armature (10) of which electromagnet is connectable to the interlocking mechanism (5), characterised in that the switch box includes a motor switch or a motor protection switch (1) as a separate component part; in that, at the ends of their thrust journals, the operating knobs (7, 8) are pivotally connected to the ends of the longer arm of an L-shaped lever member (11); in that the longer arm between the pivot mountings on sides of the switch-on knob (7) opposite a housing stop member (13) is provided with a switching cam (12), which is in frictional contact with the compression spring-loaded operating key of the motor (protection) switch (1); in that the shorter arm of the L-shaped lever member (11) on sides of the switching-on knob (7) serves as a laterally rigidly angled locking cam (14) which co-operates with a housing projection (15) in a form-locking manner; in that the longer arm on sides of the switching-off knob (8) can engage in a hinged armature (10) of the electromagnet (4) for releasing low-tension voltage by means of a pivotably angled connection-piece (16); and in that a release spring (17) is utilisable for the release of low-tension voltage, which spring is supported on the inner housing wall and moves the L-shaped lever member (11) into the switched-off position, which movement is defined by an additional housing stop meber (13').
2. Switch box according to claim 1, characterised in that on the lever member (11), on the one hand, the switching cam (12) for operating the motor (protection) switch (1) is disposed in a laterally offset manner between the pivotal mounting for the switching-on knob (7) and the supporting point relative to the housing stop member (13) and, on the other hand, the pivotal mounting for the switching off knob (8), which is provided with the housing stop member (13'), is disposed in a laterally offset manner between the attachment point for the release (compression) spring (17) and a pivotal angled portion for the connection-piece (16) for engagement in the hinged armature (10) of the electromagnet (4).
3. Switch box according to claim 1, characterised in that the motor switch or the motor protection switch (1) and optionally the electromagnet (4) for releasing low-tension voltage, which is connectable to the mains by means of the latter switch via a rectifier arrangement (3), are provided as prefabricated component parts adjacent one another and are insertable jointly laterally adjacent the actuating mechanism (5) into the open housing (6), which is provided with an appropriate mouting profile on its base, wherein for their securement, or possibly with the spatial incorporation of an anti-interference condenser (2), a closure cover is provided which is attachable in a form- fitting manner and fits on the lateral wall of the housing (6) by means of a plurality of attachment lugs.
4. Switch box according to claim 3, characterised in that the switch box is protected from dust and spray water because the guide bushes for the operating knobs (7,8) overlap one another in a telescopic manner by means of an inwardly drawn knob edging which extends onto the front face of the housing (6), additionally because the aperture edge of the housing (6) is gripped in a groove-like manner from sides of the closure cover, and because the cable inlet apertures are rubber-sealed in a lip-like manner from a tension-relieving means (9) at the housing end.
5. Switch box according to any of claims 1 to 4, characterised in that, in order to achieve detachable retention below an assembly aperture in the pertinent electric appliance, two oppositely disposed stop spring projections (18), which co-operate with a housing flange engaging with its front end over the assembly aperture, are moulded to fit on the outer surfaces of the housing (6).
EP84110803A 1984-09-11 1984-09-11 Variable switchbox for a motor (protective) circuit-breaking switch and undervoltage release to be mounted in electric tools or the like Expired EP0174382B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP84110803A EP0174382B1 (en) 1984-09-11 1984-09-11 Variable switchbox for a motor (protective) circuit-breaking switch and undervoltage release to be mounted in electric tools or the like
AT84110803T ATE36776T1 (en) 1984-09-11 1984-09-11 VARIABLE SWITCH BOX FOR MOTOR (PROTECTION) SWITCH AND UNDERVOLTAGE RELEASE FOR INSTALLATION IN POWER TOOLS OR. DGL.
PCT/EP1984/000276 WO1986001936A1 (en) 1984-09-11 1984-09-11 Variable switch-box for a motor (protection) switch and under-voltage trigger for incorporation in electrical tools etc.
DE8484110803T DE3473682D1 (en) 1984-09-11 1984-09-11 Variable switchbox for a motor (protective) circuit-breaking switch and undervoltage release to be mounted in electric tools or the like
DK216886A DK216886D0 (en) 1984-09-11 1986-05-09 VARIABLE SWITCH BASE FOR MOTORSHIP AND LOWER TRANSMISSIONS FOR BUILT IN ELECTRIC TOOLS AND SIMILAR DEVICES

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP84110803A EP0174382B1 (en) 1984-09-11 1984-09-11 Variable switchbox for a motor (protective) circuit-breaking switch and undervoltage release to be mounted in electric tools or the like
PCT/EP1984/000276 WO1986001936A1 (en) 1984-09-11 1984-09-11 Variable switch-box for a motor (protection) switch and under-voltage trigger for incorporation in electrical tools etc.

Publications (2)

Publication Number Publication Date
EP0174382A1 EP0174382A1 (en) 1986-03-19
EP0174382B1 true EP0174382B1 (en) 1988-08-24

Family

ID=26069343

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84110803A Expired EP0174382B1 (en) 1984-09-11 1984-09-11 Variable switchbox for a motor (protective) circuit-breaking switch and undervoltage release to be mounted in electric tools or the like

Country Status (3)

Country Link
EP (1) EP0174382B1 (en)
DK (1) DK216886D0 (en)
WO (1) WO1986001936A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7722444B2 (en) 2005-05-13 2010-05-25 Black & Decker Inc. Angle grinder
US10818450B2 (en) 2017-06-14 2020-10-27 Black & Decker Inc. Paddle switch

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3937546A1 (en) * 1989-11-10 1991-05-16 Kopp Gmbh & Co Kg Heinrich Mobile protection device for electrical load - has manual button acting simultaneously on armature and pivoted contact carrier
CH680174A5 (en) * 1990-05-23 1992-06-30 Weber Ag
DE4311958C2 (en) * 1993-04-10 1995-04-20 Felten & Guilleaume Energie Electromagnetic switching mechanism for electrical protective switching devices
GB9406944D0 (en) * 1994-04-08 1994-06-01 Gen Electric Snap in pushbuttons
DE102014015410A1 (en) 2013-10-22 2015-04-23 Marquardt Verwaltungs-Gmbh Electric switch, in particular power tool switch

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3315190A (en) * 1965-12-01 1967-04-18 Furnas Electric Co Manual contactor with low voltage release
DE1909555C3 (en) * 1969-02-26 1975-02-13 Fa. Heinrich Kopp, Inh. Theodor Simoneit, 8756 Kahl Push-button operated switch with thermal overcurrent release
SE361977B (en) * 1972-04-12 1973-11-19 Asea Ab

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7722444B2 (en) 2005-05-13 2010-05-25 Black & Decker Inc. Angle grinder
US8087976B2 (en) 2005-05-13 2012-01-03 Black & Decker Inc. Trigger assembly for angle grinder
US8087977B2 (en) 2005-05-13 2012-01-03 Black & Decker Inc. Angle grinder
US10818450B2 (en) 2017-06-14 2020-10-27 Black & Decker Inc. Paddle switch

Also Published As

Publication number Publication date
DK216886A (en) 1986-05-09
DK216886D0 (en) 1986-05-09
EP0174382A1 (en) 1986-03-19
WO1986001936A1 (en) 1986-03-27

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