EP0212231B1 - Operating device for a switch, particularly on a portable machine tool - Google Patents

Operating device for a switch, particularly on a portable machine tool Download PDF

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Publication number
EP0212231B1
EP0212231B1 EP19860109575 EP86109575A EP0212231B1 EP 0212231 B1 EP0212231 B1 EP 0212231B1 EP 19860109575 EP19860109575 EP 19860109575 EP 86109575 A EP86109575 A EP 86109575A EP 0212231 B1 EP0212231 B1 EP 0212231B1
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EP
European Patent Office
Prior art keywords
operating means
switch
actuating device
ramp
return spring
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
EP19860109575
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German (de)
French (fr)
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EP0212231A3 (en
EP0212231A2 (en
Inventor
Manfred Stäbler
Walter Barth
Winfried Helm
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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Publication of EP0212231A2 publication Critical patent/EP0212231A2/en
Publication of EP0212231A3 publication Critical patent/EP0212231A3/en
Application granted granted Critical
Publication of EP0212231B1 publication Critical patent/EP0212231B1/en
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H9/06—Casing of switch constituted by a handle serving a purpose other than the actuation of the switch, e.g. by the handle of a vacuum cleaner
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/026—Application dead man switch: power must be interrupted on release of operating member

Definitions

  • the invention is based on an actuating device according to the preamble of claim 1.
  • an actuating device is already known from DE-OS 30 23 691 and has various advantages.
  • the operating means of this actuating device snaps into a latching end position with the support of its return spring at the end of its switch-on displacement path and is held there by the action of its return spring.
  • the switch accordingly remains in the switched-on position until the operator deliberately releases the latching connection of the operating means with its guide, for example the housing of a machine tool.
  • such actuators are not suitable as so-called dead man's switches, the operating means of which only have to be released in order for the switch to come into the off position.
  • a switch which acts by turning a locking plate either as a locking or as a dead man's switch.
  • the locking plate has an inclined locking surface against which a button of the slide switch abuts in the case of the dead man's switch.
  • the actuating device according to the invention defined in claim 1 has the advantage that it creates a dead man's switch, which can be kept practically fatigue-free in its switched-on position. Furthermore, that it creates the best prerequisites with a slight change in the operating means to convert an actuating device which can only be brought into the switch-off position consciously into an actuating device which works as a dead man's switch. Through the ramp, a slight pressure on the operating means transversely to its switch-on device is sufficient to maintain the switch-on position. The required holding force can be varied by selecting the slope of the ramp.
  • the measures listed in the subclaims enable advantageous developments and improvements of the actuating device specified in the main claim.
  • the arrangement of two ramp-forming ribs and the arrangement of a latching recess in the housing and a latching lug on the operating means make separate storage of two operating means required for the different purposes unnecessary. If the dead man function is required for the intended switch, the latch on the operating device is simply broken off. This operating means then works together with the ramps in the manner according to the invention. If the latching lug is left on the operating means, the actuating device operates in the form described with the switch-on position until the return spring that maintains is released arbitrarily.
  • FIG. 1 shows a longitudinal section through an actuating device according to the invention with an operating means provided with a latch
  • FIG. 2 shows a side view of FIG. 1
  • FIG. 3 shows a longitudinal section like FIG. 1 with an operating device from which the latch has been broken off
  • FIG. 4 shows a side view of FIG 3
  • FIG. 5 shows a longitudinal section like FIG. 3, which shows a different design of the holding surfaces of the ramps.
  • a housing 1 of a hand tool holds a switch 2, a linkage 3, a return spring 4 and their abutment 5.
  • a bore 6 of a driver pin 7 one Operating means 8 engages the free end of the return spring 4.
  • a recess 9 can be penetrated by the driver pin 7.
  • the driver pin 7 also passes through a guide slot 10 in a housing wall 11 on the outer surface of which the operating means 8 bears.
  • a switch finger 12 of the switch 2 passes through a recess 13 in the switch-side end of the linkage 3.
  • a latch opening 14 in the housing wall 11 is designed to engage a latch 15 of the operating means 8.
  • Ribs 16 are arranged on both sides of the guide slot 10 and the latching opening 14 and subsequent to the latching opening 14, which have a ramp 17 inclined in the switch-on direction for the switch 2.
  • the two ribs 16 are overlapped by the operating means 8, which is hollow towards the housing wall 11.
  • the front wall of the operating means 8 is referred to as the support wall 18 because it is used to support the operating means 8 on the ribs 16.
  • the support wall 18 is supported on the ribs 16 in the switch-on position shown in FIG.
  • the support wall 18 slides when the operating means 8 is moved in the direction of its switch-on position (arrow 19) over the ribs 16 and their inclined ramps 17 until the catch 15 of the operating means 8 according to FIGS. 1 and 2 meets the outer surface of the housing wall 11 and over this finally slides into the latch opening 14.
  • the return spring 4 pulling in the direction of an arrow 20 in the opposite direction supports the latching movement by the tilting moment generated by it.
  • This tilting moment also causes the return spring 4 to hold the catch 15 in engagement with the catch opening 14 until the operator releases this catch connection by pressing on the end of the control means 8 opposite the support wall 18 (see FIGS. 1 and 2).
  • the same exemplary embodiment with the design of the operating means 8 according to FIGS. 3 and 4 acts as a dead man's switch. Supported by a notch 21 at the root of the locking lug 15, the locking lug 15 was broken off here. In the switched-on position of the operating means 8 modified in this way, the support wall 18 bears against the ramps 17. The pull of the return spring 4 is not able to pull the operating means 8 over the ramps 17 and the remaining area of the ribs 16 as long as the operator presses the operating means 8 towards the housing wall 11. The force to be applied for this pressure perpendicular to the switching movement is substantially less than the force with which the return spring 4 can be overcome directly.
  • FIG. 5 shows an operating means 8 in which the latch 15 has broken off.
  • the ramps 22 have two transverse grooves 23 which are narrower than the support wall 18 is thick.
  • this operating means tilts under the pull of the return spring 4 around the lower edge of the support wall 18 until the sharp inner edge is lifted out of the transverse groove 23 into which it had engaged. Then the support surface of the support wall 18 slides freely over the ramps 17. The shift finger 12 of the switch 2 is also brought into its switch-off position in this way.

Landscapes

  • Switch Cases, Indication, And Locking (AREA)
  • Mechanical Control Devices (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Betätigungsvorrichtung nach dem Oberbegriff des Anspruchs 1. Eine solche Betätigungsvorrichtung ist schon bekannt aus der DE-OS 30 23 691 und hat verschiedene Vorteile. Das Bedienmittel dieser Betätigungsvorrichtung rastet am Ende seines Einschaltverschiebeweges mit Unterstützung seiner Rückführfeder in eine Rastendlage ein und wird dort durch die Wirkung seiner Rückführfeder gehalten. Der Schalter bleibt demnach in Einschaltstellung, bis der Bedienende bewußt die Rastverbindung des Bedienmittels mit seiner Führung, z.B. dem Gehäuse einer Werkzeugmaschine, löst. Solche Betätigungsvorrichtungen sind aber nicht geeignet als sogenannte Totmannschalter, deren Bedienmittel lediglich losgelassen werden müssen um den Schalter in Ausschaltstellung kommen zu lassen. Andererseits sind bekannte Totmannschalter deshalb nachteilig, weil sie während der gesamten Einschaltdauer gegen die Wirkung der Rückführfeder in Einschaltstellung gehalten werden müssen. Für das sichere Rückstellen ist die Kraft der Rückführfeder so groß, daß der Bedienende beim Festhalten des Bedienmittels schnell ermüdet. Es kommt dadurch zum unbeabsichtigten Ausschalten der Handwerkzeugmaschine. Mindestens muß der Bedienende öfter Ruhepausen einlegen, die aufgrund der sonstigen Arbeitsbelastung nicht erforderlich wären. Für den Konstrukteur von Schalterbetätigungsvorrichtungen für Handwerkzeugmaschinen ergibt sich die weitere Schwierigkeit, daß es für einige Maschinen dieser Art zweckmäßig ist, Bedienmittel einzusetzen, die nur bewußt aus ihrer Einschaltstellung zu lösen sind, für andere Maschinen oder Einsatzzwecke aber die Totmann-Funktion gefordert wird. Er muß deshalb für die verschiedenen Zwecke verschiedene Betätigungsvorrichtungen fertigen und auf Lager halten lassen. Das macht die Herstellung und die Lagerhaltung relativ aufwendig.The invention is based on an actuating device according to the preamble of claim 1. Such an actuating device is already known from DE-OS 30 23 691 and has various advantages. The operating means of this actuating device snaps into a latching end position with the support of its return spring at the end of its switch-on displacement path and is held there by the action of its return spring. The switch accordingly remains in the switched-on position until the operator deliberately releases the latching connection of the operating means with its guide, for example the housing of a machine tool. However, such actuators are not suitable as so-called dead man's switches, the operating means of which only have to be released in order for the switch to come into the off position. On the other hand, known dead man's switches are disadvantageous because they have to be kept in the switch-on position against the action of the return spring during the entire switch-on period. For safe resetting, the force of the return spring is so great that the Operator tired quickly when holding the operating device. This results in the handheld power tool being switched off unintentionally. At least the operator has to take more breaks, which would not be necessary due to the other workload. For the designer of switch actuation devices for hand-held power tools, there is the further difficulty that it is expedient for some machines of this type to use operating means which can only be deliberately released from their switched-on position, but which the dead man function is required for other machines or purposes. He must therefore manufacture different actuators for different purposes and keep them in stock. This makes production and warehousing relatively complex.

Aus der DE-OS 32 01 744 ist ein Schalter bekannt, der durch Wenden einer Rastplatte entweder als Rast- oder als Totmannschalter wirkt. Die Rastplatte weist eine geneigte Rastfläche auf, gegen die ein Taster des Schaltschiebers im Falle des Totmannschalters anstößt.From DE-OS 32 01 744 a switch is known which acts by turning a locking plate either as a locking or as a dead man's switch. The locking plate has an inclined locking surface against which a button of the slide switch abuts in the case of the dead man's switch.

Vorteile der ErfindungAdvantages of the invention

Die im Anspruch 1 definierte erfindungsgemäße Betätigungsvorrichtung hat den Vorteil, daß sie einen Totmannschalter schafft, der praktisch ermüdungsfrei in seiner Einschaltstellung gehalten werden kann. Weiter, daß sie beste Voraussetzungen schafft mit einer geringfügigen Veränderung des Bedienmittels eine nur bewußt in Abschaltstellung bringbare Betätigungsvorrichtung in eine als Totmannschalter arbeitende Betätigungsvorrichtung umzuwandeln. Durch die Rampe genügt ein leichter Druck auf das Bedienmittel quer zu dessen Einschaltvorrichtung, um die Einschaltstellung aufrechtzuerhalten. Dabei kann die erforderliche Haltekraft durch Auswahl der Rampenneigung variiert werden.The actuating device according to the invention defined in claim 1 has the advantage that it creates a dead man's switch, which can be kept practically fatigue-free in its switched-on position. Furthermore, that it creates the best prerequisites with a slight change in the operating means to convert an actuating device which can only be brought into the switch-off position consciously into an actuating device which works as a dead man's switch. Through the ramp, a slight pressure on the operating means transversely to its switch-on device is sufficient to maintain the switch-on position. The required holding force can be varied by selecting the slope of the ramp.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Hauptanspruch angegebenen Betätigungsvorrichtung möglich. Durch die Anordnung zweier rampenbildender Rippen und das Anordnen einer Rastvertiefung im Gehäuse und einer Rastnase am Bedienmittel, die bei der Montage abgebrochen werden kann, erübrigt sich die getrennte Lagerhaltung zweier für die verschiedenen Einsatzzwecke benötigten Bedienmittel. Falls für den vorgesehenen Schalter die Totmann-Funktion gewünscht ist, wird die Rastnase am Bedienmittel einfach abgebrochen. Dieses Bedienmittel arbeitet dann in der erfindungsgemäßen Weise mit den Rampen zusammen. Wird die Rastnase am Bedienmittel belassen, so arbeitet die Betätigungsvorrichtung in der beschriebenen Form mit die Einschaltstellung bis zum willkürlichen Lösen aufrechterhaltender Rückführfeder.The measures listed in the subclaims enable advantageous developments and improvements of the actuating device specified in the main claim. The arrangement of two ramp-forming ribs and the arrangement of a latching recess in the housing and a latching lug on the operating means, which can be broken off during assembly, make separate storage of two operating means required for the different purposes unnecessary. If the dead man function is required for the intended switch, the latch on the operating device is simply broken off. This operating means then works together with the ramps in the manner according to the invention. If the latching lug is left on the operating means, the actuating device operates in the form described with the switch-on position until the return spring that maintains is released arbitrarily.

Zeichnungdrawing

Zwei Ausführungsbeispiele des Erfindungsgegenstandes sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 einen Längsschnitt durch eine erfindungsgemäße Betätigungsvorrichtung mit einem mit einer Rastnase versehenen Bedienmittel, Figur 2 eine Seitenansicht zu Figur 1, Figur 3 einen Längsschnitt wie Figur 1 mit einem Bedienmittel, von dem die Rastnase abgebrochen wurde, Figur 4 eine Seitenansicht zu Figur 3 und Figur 5 einen Längsschnitt wie Figur 3 die eine andere Ausbildung der Halteflächen der Rampen zeigt.Two embodiments of the subject of the invention are shown in the drawing and explained in more detail in the following description. 1 shows a longitudinal section through an actuating device according to the invention with an operating means provided with a latch, FIG. 2 shows a side view of FIG. 1, FIG. 3 shows a longitudinal section like FIG. 1 with an operating device from which the latch has been broken off, FIG. 4 shows a side view of FIG 3 and FIG. 5 shows a longitudinal section like FIG. 3, which shows a different design of the holding surfaces of the ramps.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Ein Gehäuse 1 einer Handwerkzeugmaschine nimmt einen Schalter 2, ein Gestänge 3, eine Rückführfeder 4 und deren Widerlager 5 auf. In eine Bohrung 6 eines Mitnehmerzapfens 7 eines Bedienmittels 8 greift das freie Ende der Rückführfeder 4 ein. An dem vom Schalter 2 abgewendeten Ende des Gestänges 3 ist eine Ausnehmung 9. Diese Ausnehmung 9 kann vom Mitnehmerzapfen 7 durchgriffen werden. Der Mitnehmerzapfen 7 durchgreift weiter einen Führungsschlitz 10 in einer Gehäusewand 11 an deren Außenfläche sich das Bedienmittel 8 anlegt. Ein Schaltfinger 12 des Schalters 2 durchgreift eine Ausnehmung 13 im schalterseitigen Ende des Gestänges 3.A housing 1 of a hand tool holds a switch 2, a linkage 3, a return spring 4 and their abutment 5. In a bore 6 of a driver pin 7 one Operating means 8 engages the free end of the return spring 4. At the end of the linkage 3 facing away from the switch 2 there is a recess 9. This recess 9 can be penetrated by the driver pin 7. The driver pin 7 also passes through a guide slot 10 in a housing wall 11 on the outer surface of which the operating means 8 bears. A switch finger 12 of the switch 2 passes through a recess 13 in the switch-side end of the linkage 3.

Eine Rastöffnung 14 in der Gehäusewand 11 ist für den Eingriff einer Rastnase 15 des Bedienmittels 8 passend ausgebildet. Beiderseits des Führungsschlitzes 10 und der Rastöffnung 14 sowie anschließend an die Rastöffnung 14 sind Rippen 16 angeordnet, die eine in Einschaltrichtung für den Schalter 2 geneigte Rampe 17 haben. Die beiden Rippen 16 werden vom Bedienmittel 8 übergriffen, das zur Gehäusewand 11 hin hohl ist. Die vordere Wand des Bedienmittels 8 ist als Stützwand 18 bezeichnet, weil sich mit ihr das Bedienmittel 8 auf den Rippen 16 abstützt.A latch opening 14 in the housing wall 11 is designed to engage a latch 15 of the operating means 8. Ribs 16 are arranged on both sides of the guide slot 10 and the latching opening 14 and subsequent to the latching opening 14, which have a ramp 17 inclined in the switch-on direction for the switch 2. The two ribs 16 are overlapped by the operating means 8, which is hollow towards the housing wall 11. The front wall of the operating means 8 is referred to as the support wall 18 because it is used to support the operating means 8 on the ribs 16.

Im Ausführungsbeispiel nach den Figuren 1 bis 4 stützt sich die Stützwand 18 in der in Figur 1 gezeigten Einschaltstellung auf den Rippen 16 ab. Außerdem gleitet die Stützwand 18 beim Verschieben des Bedienmittels 8 in Richtung seiner Einschaltstellung (Pfeil 19) über die Rippen 16 und deren geneigte Rampen 17, bis die Rastnase 15 des Bedienmittels 8 nach den Figuren 1 und 2 auf die Außenfläche der Gehäusewand 11 trifft und über diese gleitend schließlich in die Rastöffnung 14 einfällt. Die in Richtung eines Pfeiles 20 in Gegenrichtung ziehende Rückführfeder 4 unterstützt dabei die Einrastbewegung durch das von ihr erzeugte Kippmoment.In the exemplary embodiment according to FIGS. 1 to 4, the support wall 18 is supported on the ribs 16 in the switch-on position shown in FIG. In addition, the support wall 18 slides when the operating means 8 is moved in the direction of its switch-on position (arrow 19) over the ribs 16 and their inclined ramps 17 until the catch 15 of the operating means 8 according to FIGS. 1 and 2 meets the outer surface of the housing wall 11 and over this finally slides into the latch opening 14. The return spring 4 pulling in the direction of an arrow 20 in the opposite direction supports the latching movement by the tilting moment generated by it.

Dieses Kippmoment bewirkt auch, daß die Rückführfeder 4 die Rastnase 15 im Eingriff in die Rastöffnung 14 hält, bis der Bedienende diese Rastverbindung durch Drücken auf das der Stützwand 18 gegenüberliegende Ende des Bedienmittels 8 löst (siehe Figuren 1 und 2).This tilting moment also causes the return spring 4 to hold the catch 15 in engagement with the catch opening 14 until the operator releases this catch connection by pressing on the end of the control means 8 opposite the support wall 18 (see FIGS. 1 and 2).

Das gleiche Ausführungsbeispiel mit der Ausführung des Bedienmittels 8 nach den Figuren 3 und 4 wirkt als Totmannschalter. Unterstützt durch eine Kerbe 21 an der Wurzel der Rastnase 15 wurde hier die Rastnase 15 abgebrochen. In Einschaltstellung des so veränderten Bedienmittels 8 liegt die Stützwand 18 an den Rampen 17 an. Der Zug der Rückführfeder 4 vermag das Bedienmittel 8 solange nicht über die Rampen 17 und den übrigen Bereich der Rippen 16 zu ziehen, solange der Bedienende das Bedienmittel 8 zur Gehäusewand 11 hin drückt. Die für diesen Druck senkrecht zur Schaltbewegung aufzubringende Kraft ist wesentlich geringer als die Kraft mit der die Rückführfeder 4 direkt überwunden werden kann. Sie hängt ab vom Neigungswinkel der Rampen 17 und dem Reibungskoeffizienten für die Reibung zwischen der Auflagefläche der Stützwand 18 und den Rampenflächen. Entfällt dieser Druck auf das Bedienmittel 8 (Figur 3), so zieht die Rückführfeder 4 das Bedienmittel 8 über die Rampen 17 und den restlichen Rücken der Rippen 16 zurück in die Abschaltstellung des Schaltfingers 12 des Schalters 2.The same exemplary embodiment with the design of the operating means 8 according to FIGS. 3 and 4 acts as a dead man's switch. Supported by a notch 21 at the root of the locking lug 15, the locking lug 15 was broken off here. In the switched-on position of the operating means 8 modified in this way, the support wall 18 bears against the ramps 17. The pull of the return spring 4 is not able to pull the operating means 8 over the ramps 17 and the remaining area of the ribs 16 as long as the operator presses the operating means 8 towards the housing wall 11. The force to be applied for this pressure perpendicular to the switching movement is substantially less than the force with which the return spring 4 can be overcome directly. It depends on the angle of inclination of the ramps 17 and the coefficient of friction for the friction between the bearing surface of the support wall 18 and the ramp surfaces. If this pressure does not apply to the operating means 8 (FIG. 3), the return spring 4 pulls the operating means 8 back over the ramps 17 and the remaining back of the ribs 16 into the switched-off position of the switching finger 12 of the switch 2.

Im Ausführungsbeispiel nach Figur 5 ist der Aufbau der Betätigungsvorrichtung bis auf die Gestaltung von Rampen 22 gleich dem der Vorrichtung nach den Figuren 1 bis 4. In Figur 5 ist ein Bedienmittel 8 gezeigt, bei dem die Rastnase 15 abgebrochen ist. Die Rampen 22 haben zwei Querrillen 23, die schmaler sind als die Stützwand 18 dick ist. Bei der Benutzung des Ausführungsbeispiels nach Figur 5 als Totmannschalter greift die innere Kante der Stützwand 18 in eine der Querrillen 23 ein, solange der Bedienende senkrecht auf das Bedienmittel 8 drückt. Dabei ist die erforderliche Haltekraft noch geringer als im Falle gemäß Figur 3, weil nur das Kippmoment zu überwinden ist. Entfällt der Druck auf das Bedienmittel 8, kippt dieses Bedienmittel unter dem Zug der Rüchführfeder 4 solange um die untere Kante der Stützwand 18, bis die scharfe Innenkante aus der Querrille 23 herausgehoben ist, in die sie eingegriffen hatte. Danach gleitet die Stützfläche der Stützwand 18 ungehindert über die Rampen 17 hinweg. Auch so wird der Schaltfinger 12 des Schalters 2 in seine Abschaltsstellung gebracht.In the exemplary embodiment according to FIG. 5, the construction of the actuating device is the same as that of the device according to FIGS. 1 to 4, except for the design of ramps 22. FIG. 5 shows an operating means 8 in which the latch 15 has broken off. The ramps 22 have two transverse grooves 23 which are narrower than the support wall 18 is thick. When using the 5 as a dead man's switch engages the inner edge of the support wall 18 in one of the transverse grooves 23 as long as the operator presses vertically on the operating means 8. The required holding force is even lower than in the case according to FIG. 3, because only the tilting moment can be overcome. If there is no pressure on the operating means 8, this operating means tilts under the pull of the return spring 4 around the lower edge of the support wall 18 until the sharp inner edge is lifted out of the transverse groove 23 into which it had engaged. Then the support surface of the support wall 18 slides freely over the ramps 17. The shift finger 12 of the switch 2 is also brought into its switch-off position in this way.

Claims (5)

  1. Actuating device for a switch, especially on a hand-operated machine tool, in which the operating means (8) is displaceable in the switching-on direction of the switch (2), is tiltable into a holding position in the switched-on position of this switch (2) and is returnable into the switched-off position as a result of spring force, the tilting axis of this operating means (8) being placed in the region between the engagement point (6) of the return spring (4) on the operating means and the gripping faces on the operating means (8), so that the return spring (4) acts on the operating means so as also to tilt it into the holding position, characterised in that the operating means (8) is assigned a ramp (17) which is located on the machine housing (1) and which is so inclined downwards in the switching-on direction that the supporting wall (18) of the operating means (8), at the front in the switching-on direction, can be supported on it, without this ramp (17) being capable of holding the operating means (8) released by the operator in the switched-on position counter to the force of the return spring (4).
  2. Actuating device according to Claim 1, characterised in that a ramp (17) is formed in each case by two ribs (16) lying next to one another, and in that arranged immediately in front of these ribs (16) are a catch recess (14) and, on the operating means (8), a catch nose (15) for engagement into the catch recess (14) according to the known state of the art.
  3. Actuating device according to Claim 2, characterised in that the front edge of the ramps (17) and the rear edge of the catch recess (14) lie in one plane.
  4. Actuating device according to Claim 2, characterised in that the catch nose (15) is notched (21) at its root, so that the catch nose (15) can be broken off at this point.
  5. Actuating device according to Claim 1, characterised in that the ramp (17) has at least one transverse groove (23), the width of which is smaller than the wall thickness of the front supporting wall (18) of the operating means (8), so that the front supporting wall (18) can slide over these transverse grooves (23) during the return of the operating means (8) when the latter is tilted about its lower edge.
EP19860109575 1985-08-10 1986-07-12 Operating device for a switch, particularly on a portable machine tool Expired - Lifetime EP0212231B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3528741 1985-08-10
DE19853528741 DE3528741A1 (en) 1985-08-10 1985-08-10 ACTUATING DEVICE FOR A SWITCH, IN PARTICULAR ON A HAND MACHINE TOOL

Publications (3)

Publication Number Publication Date
EP0212231A2 EP0212231A2 (en) 1987-03-04
EP0212231A3 EP0212231A3 (en) 1988-11-23
EP0212231B1 true EP0212231B1 (en) 1991-11-21

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EP19860109575 Expired - Lifetime EP0212231B1 (en) 1985-08-10 1986-07-12 Operating device for a switch, particularly on a portable machine tool

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US (1) US4973807A (en)
EP (1) EP0212231B1 (en)
DE (2) DE3528741A1 (en)

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JP5510887B2 (en) * 2010-01-13 2014-06-04 日立工機株式会社 Electric tool
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DE102018217991A1 (en) * 2018-10-22 2020-04-23 Robert Bosch Gmbh Actuator

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US3886341A (en) * 1973-05-02 1975-05-27 Bowman Ali Inc Switch operating device for use with an over center diaphragm switch contact assembly with contact ramp camming surface
US3854020A (en) * 1973-06-29 1974-12-10 Black & Decker Mfg Co Trigger mechanism for hand-operated power device including stationary locking device which provides lock-off and lock-on operation
US4023001A (en) * 1975-09-02 1977-05-10 Milwaukee Electric Tool Corporation Locking member for hand-held trigger actuated switch
US4132873A (en) * 1977-03-16 1979-01-02 General Time Corporation Multiposition switch
GB2070207B (en) * 1980-02-19 1983-03-23 Desoutter Ltd Safety catch for a power tool
US4331844A (en) * 1980-02-29 1982-05-25 Shigeru Saitoh Electric switch device
DE3023691A1 (en) * 1980-06-25 1982-01-21 Robert Bosch Gmbh, 7000 Stuttgart SWITCH WITH A CONTROL DEVICE, IN PARTICULAR ON A HAND MACHINE TOOL
DE3201744A1 (en) * 1982-01-21 1983-07-28 Karl M. Reich Maschinenfabrik GmbH, 7440 Nürtingen SWITCHES FOR ELECTRIC TOOLS

Also Published As

Publication number Publication date
DE3682548D1 (en) 1992-01-02
EP0212231A3 (en) 1988-11-23
US4973807A (en) 1990-11-27
EP0212231A2 (en) 1987-03-04
DE3528741A1 (en) 1987-02-12

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