EP0369221B1 - Electrical switch for an electrical hand-held tool - Google Patents

Electrical switch for an electrical hand-held tool Download PDF

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Publication number
EP0369221B1
EP0369221B1 EP89119887A EP89119887A EP0369221B1 EP 0369221 B1 EP0369221 B1 EP 0369221B1 EP 89119887 A EP89119887 A EP 89119887A EP 89119887 A EP89119887 A EP 89119887A EP 0369221 B1 EP0369221 B1 EP 0369221B1
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EP
European Patent Office
Prior art keywords
electrical switch
switch according
axis
housing
bolt
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
EP89119887A
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German (de)
French (fr)
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EP0369221A3 (en
EP0369221A2 (en
Inventor
Günter Berger
Gerd Dipl.-Ing. Berner
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP0369221A2 publication Critical patent/EP0369221A2/en
Publication of EP0369221A3 publication Critical patent/EP0369221A3/en
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Publication of EP0369221B1 publication Critical patent/EP0369221B1/en
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    • 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

Definitions

  • the invention relates to an electrical switch for an electrical hand tool according to the preamble of the main claim.
  • Shifting with all fingers together is less sensitive than shifting with the single finger.
  • the new switch which can be operated with less sensitivity, is intended for rough, professional use on construction sites, in which work gloves are predominantly used.
  • the storage or guidance of the known switch which requires special sensitivity, is unsuitable for the new applications described.
  • the electrical switch for an electrical hand tool with the characterizing features of claim 1 offers the advantage of a robust, simple construction from a few individual parts.
  • the switch is also easy to install and insensitive to dust, the latter resulting from rounded shapes and avoiding the edges and angles of the guides and the guided parts: dust and dirt only offer small areas of attack. Any adhering dirt can easily be removed due to the frictional forces in the guides.
  • Figure 1 shows in side view and partially. in the vertical longitudinal section the switch in the starting position.
  • Figure 2 shows the guide body of the switch,
  • Figures 3, 4, 5 and 6 each show the view of an embodiment of the pivot axis of the switch.
  • the electrical switch 1 provided for an electrical hand tool has a known switching mechanism 2, which is not shown in its details.
  • a tiltable plunger 3 bent in the tilting direction is the switching element of the switching mechanism 2 and is mounted in the latter. With its free end 4, the plunger 3 is guided over a first guide pin 5 between horizontal guide strips 6 of an actuating member 7.
  • the actuator 7 is a one-armed lever, which is designed in cross section as a U-profile. At its ends, the actuator 7 is provided with parallel through holes 8, 9. At one end, an axle pin 10 is mounted in the bores 8 and a second guide pin 11 is mounted essentially parallel to this at the other end in the bores 9. Adjacent to the axle pin 10, a bearing pin 13 is mounted in bores 14 at a distance on the housing 12 of the switch 1. An annular eyelet 15 is rigidly connected to the bearing pin 13 and the axle pin 10 with these.
  • a first and a second return spring 16, 17 are arranged, which are mounted on pins 18.
  • the first return spring 16 is arranged transversely with respect to its line of action of force
  • the second return spring 17 is arranged parallel to the longitudinal axis of the actuating member 7.
  • a guide body 19 is arranged on the housing 12 adjacent to the second guide pin 11 at the end of the actuating member 7.
  • the guide body 19 is shown enlarged, which is provided with a substantially vertically symmetrical, z-profile-shaped recess 20.
  • the recess 20 is supplemented by a vertical first and second extension 21, 22 directed towards the inside of the guide body 19.
  • the Z profile thus has an indicated meandering shape with protruding first and second webs 23, 24, the recess 20 being designed with only rounded edges.
  • the webs 23, 24 are provided on the extensions 21, 22 facing sides with indents 23 ', 24'.
  • the recess 20 is open to the outside via a slot 25 tapering in the direction of the recess 20 and is accessible for mounting the second guide bolt 11, which is already connected to the actuating member 7.
  • the slot 25 is narrower than the diameter of the second guide pin 11, which can be inserted into the slot by pressing without a tool, but can only be guided out of the recess 20 with a tool.
  • the operating procedures in and at switch 1 are as follows: Several fingers of a hand, not shown, encompass the actuating member 7, the thumb being supported on the opposite part of the electrical hand tool, which is also not shown. Upon a closing movement of the fingers, the actuating member 7 is pivoted about the axle pin 10 and the bearing pin 13. The second guide pin 11 in the recess 20 in the guide body 19 moves essentially perpendicularly to the switch housing 12 until it strikes the end of the first extension 21. The path of the second guide pin 11 to be covered is structurally fixed to a few millimeters. Moving the actuator 7 in this position is not possible. This must first be moved back into the starting position, which is caused by the first return spring 16 when the actuating force decreases.
  • the switching movement described corresponds to an unwanted switching on of the hand tool and, as described, is prevented, which implements a switch-on lock.
  • the actuating member 7 When the intended switch-on, the actuating member 7 must first be moved parallel to its longitudinal axis against the force of the second return spring 17 until the second guide pin 11 crosses the web 23 and has reached the longer part of the recess 20. Only then can the actuator 7 apply a vertical actuating force counter to the force of the first return spring 16 to carry out the full switching stroke until the guide pin 11 strikes within the longer piece of the recess 20 at its housing end.
  • the pivoting movement of the actuating member 7 is followed by the first guide pin 5 mounted between the guide strips 6 together with the plunger 3 and thereby triggers the switching mechanism 2 to be switched on.
  • the actuating member 7 must perform a further displacement movement against the force of the second return spring 17 parallel to its longitudinal axis. If the actuating member 7 is then moved back in the direction of the starting position and the action of the first return spring 16, the second guide pin 11 can snap into the second extension 22, the second web 24 preventing the guide pin 11 and thus the actuating member 7 from being returned to the initial position . This creates a shutdown lock against unintentional shutdown.
  • the indents 23 ', 24' are provided on the webs 23, 24, which come into effect for both possible mounting positions of the guide body 19 in the switch-on position: when the switch-on position, the actuating member 7 is moved in the direction of the housing 12 , A horizontal movement against the force of the return spring 17 is forced via the feed 23 'or 24' and the second guide pin 11. This inhibiting force determines the additional effect of the switch-off lock.
  • the switch-on lock is released by pivoting the actuating member 7 by a full remaining stroke in the actuating direction.
  • the actuating member 7 can automatically return to the starting position.
  • the actuating element 7 tilts the plunger 5 into the switched-off position of the switching mechanism 2. Due to the swing-like suspension of the axle pin 10, the pivoting movement of the actuating member 7 can be superimposed on a horizontal displacement movement, the path of which is limited by the diameter of the eyelet 15. If the eyelet 15 is irregularly curved or has an elliptical shape, its largest diameter determines the maximum displacement at one end of the actuating member.
  • the diameter of the eyelet 15 is matched to the maximum displacement path predetermined by the Z profile in the guide body 19.
  • the guide body 19 ensures a particularly smooth-running, self-cleaning function, particularly in a form-elastic design, for example made of PVC, due to a minimal surface size of the leading and guided parts.
  • the guide body 19 can also be used when installed, rotated by 180 degrees about the longitudinal axis of the second guide pin 11.
  • a rocker 28 is arranged between the actuating member 7 and the housing 12 in a further exemplary embodiment of the switch 1.
  • This rocker 28 consists of two parallel axle bolts 29, 30 with a strut-like intermediate piece 31 rigidly connecting them to one another.
  • the axle bolt 30 facing the housing 12 is mounted in two receiving bores 14 on the housing 12.
  • a U-shaped bracket 32 consists of a curved part 33 and two 2 legs 34, arranged, the curved part 33 of which is rotatably mounted on an abutment 35 on the housing 12.
  • the upper ends of the legs 34 are preferably rectangular, bent laterally and mounted in the bores 8 of the actuator 7.
  • the bracket 32 is suspended with its part 33 on the abutment 35 in such a way that it can be freely moved in the direction of the housing 12 when the actuating member 7 is pressed.
  • spring-elastic elements are arranged which, because of the displacement movement of the actuating member 7, are designed primarily for tensile loads.
  • the resilient elements are in one case a helical spring 36, in the other case a molded part 38 made of spring steel sheet.
  • the coil spring 36 is mounted on the housing 12 on a pin 37 and on the actuating member 7 on the axle pin 10.
  • the molded part 38 is rotatably mounted on the actuator 7 by means of axle bolts 10 and on the housing 12 by means of bearing bolts 13.
  • the combination of oscillatingly rotatable guidance of the axle pin 10 with a simplified guidance of the second guide pin 11 and its cylindrical design prevents the hand tool from being switched on or off in an especially safe manner in difficult working or grip positions.
  • the guidance of the axle pin 10 is a simplified, particularly dust-compatible construction in comparison with the known sliding bearings.

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  • Push-Button Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Mechanisms For Operating Contacts (AREA)

Description

Die Erfindung bezieht sich auf einen elektrischen Schalter für ein elektrisches Handwerkzeug entsprechend dem Oberbegriff des Hauptanspruchs.The invention relates to an electrical switch for an electrical hand tool according to the preamble of the main claim.

Ein vergleichbarer elektrischer Schalter ist durch die US-PS 3 854 020 bekanntgeworden. Dessen Schema für die Einschalt-, Arretier- und Ausschaltbewegung ist wohl geeignet für ein Schalten mit einzelnen Fingern jedoch nicht für Anwendungsfälle, bei denen die Finger einer Hand gemeinsam die Schaltbewegung ausführen, wobei der Daumen gegenhält. Entsprechend den diesbezüglich unterschiedlichen Bewegungsabläufen ist auch die Gestaltung des Betätigungsorgans des Schalters und dessen Lagerung unterschiedlichen Forderungen unterworfen.A comparable electrical switch has become known from U.S. Patent No. 3,854,020. Its diagram for the switch-on, locking and switch-off movement is probably suitable for switching with individual fingers, but not for applications in which the fingers of one hand carry out the switching movement together, with the thumb holding up. In accordance with the different movement sequences in this regard, the design of the actuating member of the switch and its mounting are also subject to different requirements.

Das Schalten mit allen Fingern gemeinsam ist weniger feinfühlig als das Schalten mit dem einzelnen Finger. Überdies ist der neue, mit weniger Feinfühligkeit bedienbare Schalter für rauhen, professionellen Baustelleneinsatz vorgesehen, bei dem vorwiegend mit Arbeitshandschuhen gearbeitet wird. Demzufolge ist die eine besondere Feinfühligkeit erfordernde Lagerung bzw. Führung des bekannten Schalters für die beschriebenen neuen Anwendungsfälle ungeeignet.Shifting with all fingers together is less sensitive than shifting with the single finger. In addition, the new switch, which can be operated with less sensitivity, is intended for rough, professional use on construction sites, in which work gloves are predominantly used. As a result, the storage or guidance of the known switch, which requires special sensitivity, is unsuitable for the new applications described.

Vorteile der ErfindungAdvantages of the invention

Der elektrische Schalter für ein elektrisches Handwerkzeug mit den kennzeichnenden Merkmalen des Anspruchs 1 bietet den Vorteil eines robusten, einfachen Aufbaus aus wenigen Einzelteilen. Der Schalter ist zudem leicht montierbar und staubunempfindlich, wobei letzteres aus abgerundeten Formen und Vermeiden von Kanten und Winkeln der Führungen und der geführten Teile resultiert: Staub und Schmutz bieten sich nur kleine Angriffsflächen. Eventuell dennoch haftender Schmutz ist infolge der Reibkräfte in den Führungen leicht lösbar.The electrical switch for an electrical hand tool with the characterizing features of claim 1 offers the advantage of a robust, simple construction from a few individual parts. The switch is also easy to install and insensitive to dust, the latter resulting from rounded shapes and avoiding the edges and angles of the guides and the guided parts: dust and dirt only offer small areas of attack. Any adhering dirt can easily be removed due to the frictional forces in the guides.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Merkmalen der Unteransprüche.Further advantageous embodiments of the invention result from the features of the subclaims.

Zeichnungdrawing

Nachstehend ist die Erfindung anhand von Ausführungsbeispielen erläutert. Dabei zeigt Figur 1 in der Seitenansicht und z.T. im vertikalen Längsschnitt den Schalter in der Ausgangsstellung. Die Figur 2 zeigt den Führungskörper des Schalters, die Figuren 3, 4, 5 und 6 zeigen die Ansicht jeweils einer Ausführungsform der Schwenkachse des Schalters.The invention is explained below using exemplary embodiments. Figure 1 shows in side view and partially. in the vertical longitudinal section the switch in the starting position. Figure 2 shows the guide body of the switch, Figures 3, 4, 5 and 6 each show the view of an embodiment of the pivot axis of the switch.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Der für ein elektrisches Handwerkzeug vorgesehene elektrische Schalter 1 besitzt ein bekanntes Schaltwerk 2, das nicht in seinen Einzelheiten dargestellt ist. Ein kippbarer, in Kipprichtung gebogener Stößel 3 ist Schaltglied des Schaltwerks 2 und in diesem gelagert. Mit seinem freien Ende 4 ist der Stößel 3 über einen ersten Führungsbolzen 5 zwischen horizontalen Führungsleisten 6 eines Betätigungsorgans 7 geführt.The electrical switch 1 provided for an electrical hand tool has a known switching mechanism 2, which is not shown in its details. A tiltable plunger 3 bent in the tilting direction is the switching element of the switching mechanism 2 and is mounted in the latter. With its free end 4, the plunger 3 is guided over a first guide pin 5 between horizontal guide strips 6 of an actuating member 7.

Das Betätigungsorgan 7 ist ein einarmiger Hebel, der im Querschnitt als U-Profil ausgebildet ist. An seinen Enden ist das Betätigungsorgan 7 mit zueinander parallelen, durchgehenden Bohrungen 8, 9 versehen. An dem einen Ende ist in den Bohrungen 8 ein Achsbolzen 10 und im wesentlichen parallel zu diesem an anderen Ende in den Bohrungen 9 ein zweiter Führungsbolzen 11 gelagert. Zu dem Achsbolzen 10 benachbart ist in einem Abstand am Gehäuse 12 des Schalters 1 ein Lagerbolzen 13 in Bohrungen 14 gelagert. Eine ringförmige Öse 15 ist über den Lagerbolzen 13 und den Achsbolzen 10 geführt mit diesen starr verbunden.The actuator 7 is a one-armed lever, which is designed in cross section as a U-profile. At its ends, the actuator 7 is provided with parallel through holes 8, 9. At one end, an axle pin 10 is mounted in the bores 8 and a second guide pin 11 is mounted essentially parallel to this at the other end in the bores 9. Adjacent to the axle pin 10, a bearing pin 13 is mounted in bores 14 at a distance on the housing 12 of the switch 1. An annular eyelet 15 is rigidly connected to the bearing pin 13 and the axle pin 10 with these.

Zwischen dem Betätigungsorgan 7 und dem Gehäuse 12 sind eine erste und eine zweite Rückstellfeder 16, 17 angeordnet, die an Zapfen 18 gelagert sind. Die erste Rückstellfeder 16 ist bezüglich ihrer Kraftwirkungslinie quer, die zweite Rückstellfeder 17 parallel zur Längsachse des Betätigungsorgans 7 angeordnet.Between the actuator 7 and the housing 12, a first and a second return spring 16, 17 are arranged, which are mounted on pins 18. The first return spring 16 is arranged transversely with respect to its line of action of force, the second return spring 17 is arranged parallel to the longitudinal axis of the actuating member 7.

Zum zweiten Führungsbolzen 11 am Ende des Betätigungsorgans 7 benachbart ist am Gehäuse 12 ein Führungskörper 19 angeordnet.A guide body 19 is arranged on the housing 12 adjacent to the second guide pin 11 at the end of the actuating member 7.

In Figur 2 ist der Führungskörper 19 vergrößert dargestellt, der mit einer im wesentlichen senkrecht symmetrisch, z-profilförmigen Ausnehmung 20 versehen ist. Am Beginn und am Ende des z-Profils ist die Ausnehmung 20 um je eine senkrechte, auf das Innere des Führungskörpers 19 gerichtete erste und zweite Erweiterung 21, 22 ergänzt. Somit hat das Z-Profil eine angedeutete Mäanderform mit einragenden ersten und zweiten Stegen 23, 24, wobei die Ausnehmung 20 mit ausschließlich gerundeten Kanten ausgeführt ist. Die Stege 23, 24 sind auf den den Erweiterungen 21, 22 zugewandten Seiten mit Einzügen 23′, 24′ versehen.In Figure 2, the guide body 19 is shown enlarged, which is provided with a substantially vertically symmetrical, z-profile-shaped recess 20. At the beginning and at the end of the z-profile, the recess 20 is supplemented by a vertical first and second extension 21, 22 directed towards the inside of the guide body 19. The Z profile thus has an indicated meandering shape with protruding first and second webs 23, 24, the recess 20 being designed with only rounded edges. The webs 23, 24 are provided on the extensions 21, 22 facing sides with indents 23 ', 24'.

Über einen sich in Richtung der Ausnehmung 20 verjüngenden, V-förmig durchgehenden Schlitz 25 ist die Ausnehmung 20 nach außen offen und für eine Montage des bereits mit dem Betätigungsorgan 7 verbundenen zweiten Führungsbolzens 11 zugänglich. Der Schlitz 25 ist schmaler als der Durchmesser des zweiten Führungsbolzens 11, der ohne Werkzeug durch Einpressen in den Schlitz eingeführt, jedoch nur mit einem Werkzeug wieder aus der Ausnehmung 20 herausgeführt werden kann.The recess 20 is open to the outside via a slot 25 tapering in the direction of the recess 20 and is accessible for mounting the second guide bolt 11, which is already connected to the actuating member 7. The slot 25 is narrower than the diameter of the second guide pin 11, which can be inserted into the slot by pressing without a tool, but can only be guided out of the recess 20 with a tool.

Die Betätigungsabläufe im und am Schalter 1 sind folgende:
Mehrere nicht mit dargestellte Finger einer Hand umgreifen das Betätigungsorgan 7, wobei der Daumen sich am gegenüberliegenden Teil des ebenfalls nichtmitdargestellten elektrischen Handwerkzeugs abstützt. Auf eine Schließbewegung der Finger hin wird das Betätigungsorgan 7 um den Achsbolzen 10 und den Lagerbolzen 13 geschwenkt. Dabei bewegt sich der zweite Führungsbolzen 11 in der Ausnehmung 20 im Führungskörper 19 im wesentlichen senkrecht auf das Schaltgehäuse 12 zu, bis es auf das Ende der ersten Erweiterung 21 auftrifft. Der dabei zurückzulegende Weg des zweiten Führungsbolzens 11 ist konstruktiv auf wenige Millimeter festgelegt. Ein Weiterbewegen des Betätigungsorgans 7 in dieser Position ist nicht möglich. Dieses muß zunächst wieder in die Ausgangsstellung zurückbewegt werden, was beim Nachlassen der Betätigungskraft durch die erste Rückstellfeder 16 bewirkt wird.The operating procedures in and at switch 1 are as follows:
Several fingers of a hand, not shown, encompass the actuating member 7, the thumb being supported on the opposite part of the electrical hand tool, which is also not shown. Upon a closing movement of the fingers, the actuating member 7 is pivoted about the axle pin 10 and the bearing pin 13. The second guide pin 11 in the recess 20 in the guide body 19 moves essentially perpendicularly to the switch housing 12 until it strikes the end of the first extension 21. The path of the second guide pin 11 to be covered is structurally fixed to a few millimeters. Moving the actuator 7 in this position is not possible. This must first be moved back into the starting position, which is caused by the first return spring 16 when the actuating force decreases.

Die beschriebene Schaltbewegung entspricht einem ungewollten Einschalten des Handwerkzeugs und wird, wie beschrieben, verhindert, womit eine Einschaltsperre realisiert ist.The switching movement described corresponds to an unwanted switching on of the hand tool and, as described, is prevented, which implements a switch-on lock.

Beim beabsichtigten Einschalten muß das Betätigungsorgan 7 zuerst parallel zu seiner Längsachse entgegen der Kraft der zweiten Rückstellfeder 17 bewegt werden, bis der zweite Führungsbolzen 11 den Steg 23 übertreten und das längere Stück der Ausnehmung 20 erreicht hat. Erst dann kann das Betätigungsorgan 7 einer senkrechten Betätigungskraft entgegen der Kraft der ersten Rückstellfeder 16 zur Ausführung des vollen Schalthubes folgen, bis der Führungsbolzen 11 innerhalb des längeren Stückes der Ausnehmung 20 an deren gehäuseseitigem Ende anschlägt. Der Schwenkbewegung das Betätigungsorgans 7 folgt der zwischen den Führungsleisten 6 gelagerte erste Führungsbolzen 5 gemeinsam mit dem Stößel 3 und löst dabei das Einschalten des Schaltwerks 2 aus.When the intended switch-on, the actuating member 7 must first be moved parallel to its longitudinal axis against the force of the second return spring 17 until the second guide pin 11 crosses the web 23 and has reached the longer part of the recess 20. Only then can the actuator 7 apply a vertical actuating force counter to the force of the first return spring 16 to carry out the full switching stroke until the guide pin 11 strikes within the longer piece of the recess 20 at its housing end. The pivoting movement of the actuating member 7 is followed by the first guide pin 5 mounted between the guide strips 6 together with the plunger 3 and thereby triggers the switching mechanism 2 to be switched on.

Soll das Schaltwerk 2 in der Einschaltstellung arretiert werden, muß das Betätigungsorgan 7 parallel zu seiner Längsachse eine weitere Verschiebebewegung entgegen der Kraft der zweiten Rückstellfeder 17 ausführen. Wird dann das Betätigungsorgan 7 in Richtung der Ausgangsstellung und der Wirkung der ersten Rückstellfeder 16 folgend zurückbewegt, kann der zweite Führungsbolzen 11 in die zweite Erweiterung 22 einrasten, wobei der zweite Steg 24 ein Zurückführen des Führungsbolzens 11 und damit des Betätigungsorgans 7 in die Ausgangsstellung verhindert. Damit ist eine Ausschaltsperre gegen unbeabsichtigtes Ausschalten geschaffen. Als zusätzliches Verstärkungsmittel für die Ausschaltsperre sind die Einzüge 23′, 24′ an den Stegen 23, 24 vorgesehen, die für beide möglichen Montagepositionen des Führungskörpers 19 in der Einschaltstellung zur Wirkung kommen: Wird in der Einschaltstellung das Betätigungsorgan 7 in Richtung des Gehäuses 12 bewegt, wird über den Einzug 23′ oder 24′ und den zweiten Führungsbolzen 11 eine horizontale Bewegung entgegen der Kraftwirkung der Rückstellfeder 17 erzwungen. Diese Hemmkraft bestimmt die zusätzliche Wirkung der Ausschaltsperre.If the switching mechanism 2 is to be locked in the switched-on position, the actuating member 7 must perform a further displacement movement against the force of the second return spring 17 parallel to its longitudinal axis. If the actuating member 7 is then moved back in the direction of the starting position and the action of the first return spring 16, the second guide pin 11 can snap into the second extension 22, the second web 24 preventing the guide pin 11 and thus the actuating member 7 from being returned to the initial position . This creates a shutdown lock against unintentional shutdown. As additional reinforcement for the switch-off lock, the indents 23 ', 24' are provided on the webs 23, 24, which come into effect for both possible mounting positions of the guide body 19 in the switch-on position: when the switch-on position, the actuating member 7 is moved in the direction of the housing 12 , A horizontal movement against the force of the return spring 17 is forced via the feed 23 'or 24' and the second guide pin 11. This inhibiting force determines the additional effect of the switch-off lock.

Die Einschalt-Arretierung wird gelöst, indem das Betätigungsorgan 7 um einen vollen verbleibenden Hub in Betätigungsrichtung geschwenkt wird. Sobald dabei der Führungsbolzen 11 der Wirkung der Rückstellfeder 17 folgend über den zweiten Steg 24 gelangt ist, kann das Betätigungsorgan 7 selbsttätig in die Ausgangsstellung zurückkehren. Bei seiner Bewegung in die Ausgangsposition kippt das Betätigungsorgan 7 den Stößel 5 in die Ausschaltstellung des Schaltwerks 2. Aufgrund der schwingenartig Aufhängung des Achsbolzens 10 ist der Schwenkbewegung des Betätigungsorgans 7 eine horizontale Verschiebebewegung überlagerbar, deren Weg durch den Durchmesser der Öse 15 begrenzt ist. Falls die Öse 15 unregelmäßig gekrümmt ist oder Ellipsenform hat, bestimmt deren größter Durchmesser den maximalen Verschiebeweg an dem einen Ende des Betätigungsorgans. Der Durchmesser der Öse 15 ist auf den maximalen, durch das Z-Profil im Führungskörper 19 vorgegebenen Verschiebeweg abgestimmt.The switch-on lock is released by pivoting the actuating member 7 by a full remaining stroke in the actuating direction. As soon as the guide pin 11 has reached the action of the return spring 17 via the second web 24, the actuating member 7 can automatically return to the starting position. When it moves into the starting position, the actuating element 7 tilts the plunger 5 into the switched-off position of the switching mechanism 2. Due to the swing-like suspension of the axle pin 10, the pivoting movement of the actuating member 7 can be superimposed on a horizontal displacement movement, the path of which is limited by the diameter of the eyelet 15. If the eyelet 15 is irregularly curved or has an elliptical shape, its largest diameter determines the maximum displacement at one end of the actuating member. The diameter of the eyelet 15 is matched to the maximum displacement path predetermined by the Z profile in the guide body 19.

Die bauliche Vereinigung der Einschaltsperre mit der Ausschaltsperre in einem kompakten Führungskörper 19 ergibt zusammen mit dem zweiten, zylindrisch geformten Führungsbolzen 11 eine leichtgängige, exakte Führung für das Betätigungsorgan 7, die zugleich zwingend eindeutig und nicht hakelig ein z-förmiges Schaltschema vorschreibt. Der Führungskörper 19 sichert vor allem in einer formelastischen Ausführung, etwa aus PVC bestehend, eine besonders leichtgängige, selbstreinigende Funktion, bedingt durch eine minimale Oberflächengröße der führenden und geführten Teile.The structural union of the switch-on lock with the switch-off lock in a compact guide body 19, together with the second, cylindrical-shaped guide pin 11, results in a smooth, exact guide for the actuating member 7, which at the same time prescribes a Z-shaped circuit diagram unambiguously and not unevenly. The guide body 19 ensures a particularly smooth-running, self-cleaning function, particularly in a form-elastic design, for example made of PVC, due to a minimal surface size of the leading and guided parts.

In Figur 2 ist gut zu erkennen, daß der Führungskörper 19 auch um die Längsachse des zweiten Führungsbolzens 11 um 180 Grad gedreht eingebaut verwendbar ist.It can be clearly seen in FIG. 2 that the guide body 19 can also be used when installed, rotated by 180 degrees about the longitudinal axis of the second guide pin 11.

Gemäß Figur 3 ist bei einem weiteren Ausführungsbeispiel des Schalters 1 zwischen dem Betätigungsorgan 7 und dem Gehäuse 12 eine Schwinge 28 angeordnet. Diese Schwinge 28 besteht aus zwei zueinander parallelen Achsbolzen 29, 30 mit einem diese starr miteinander verbindenden, strebenartigen Zwischenstück 31. Der dem Gehäuse 12 zugewandte Achsbolzen 30 ist in zwei Aufnahmebohrungen 14 am Gehäuse 12 gelagert.According to FIG. 3, a rocker 28 is arranged between the actuating member 7 and the housing 12 in a further exemplary embodiment of the switch 1. This rocker 28 consists of two parallel axle bolts 29, 30 with a strut-like intermediate piece 31 rigidly connecting them to one another. The axle bolt 30 facing the housing 12 is mounted in two receiving bores 14 on the housing 12.

Wie in Figur 4 anhand eines weiteren Ausführungsbeispiels gezeigt, ist ein U-förmiger Bügel 32, bestehend aus einem gekrümmten Teil 33 und zwei 2 Schenkeln 34, angeordnet, dessen gekrümmter Teil 33 an einem Widerlager 35 am Gehäuse 12 drehbar gelagert ist. Die oberen Enden der Schenkel 34 sind vorzugsweise rechtwinklig, seitlich gebogen und in den Bohrungen 8 des Betätigungsorgans 7 gelagert. Der Bügel 32 ist mit seinem Teil 33 so am Widerlager 35 eingehängt, daß dieser bei Druck auf das Betätigungsorgan 7 in Richtung des Gehäuses 12 frei bewegbar ist.As shown in FIG. 4 on the basis of a further exemplary embodiment, a U-shaped bracket 32 consists of a curved part 33 and two 2 legs 34, arranged, the curved part 33 of which is rotatably mounted on an abutment 35 on the housing 12. The upper ends of the legs 34 are preferably rectangular, bent laterally and mounted in the bores 8 of the actuator 7. The bracket 32 is suspended with its part 33 on the abutment 35 in such a way that it can be freely moved in the direction of the housing 12 when the actuating member 7 is pressed.

In den Figuren 5 und 6 sind in zwei weiteren Ausführungsbeispielen federelastische Elemente angeordnet, die wegen der vorgesehenen Verschiebebewegung des Betätigungsorgans 7 vor allem für Zugbelastung ausgelegt sind. Die federelastischen Elemente sind in einem Fall eine Schraubenfeder 36, im anderen Fall ein Formteil 38 aus Federstahblech. Die Schraubenfeder 36 ist am Gehäuse 12 an einem Zapfen 37 und am Betätigungsorgan 7 am Achsbolzen 10 gelagert. Das Formteil 38 ist am Betätigungsorgan 7 mittels Achsbolzen 10 und am Gehäuse 12 mittels Lagerbolzen 13 drehbar gelagert.In FIGS. 5 and 6, in two further exemplary embodiments, spring-elastic elements are arranged which, because of the displacement movement of the actuating member 7, are designed primarily for tensile loads. The resilient elements are in one case a helical spring 36, in the other case a molded part 38 made of spring steel sheet. The coil spring 36 is mounted on the housing 12 on a pin 37 and on the actuating member 7 on the axle pin 10. The molded part 38 is rotatably mounted on the actuator 7 by means of axle bolts 10 and on the housing 12 by means of bearing bolts 13.

Die Kombination von schwingend drehbeweglicher Führung des Achsbolzens 10 mit einer vereinfachten Führung des zweiten Führungsbolzen 11 sowie dessen zylindrische Ausbildung verhindert in besonders sicherer Weise ein ungewolltes Ein- bzw. Ausschalten des Handwerkzeugs bei schwierigen Arbeits- bzw. Griffpositionen. Insbesondere die Führung des Achsbolzens 10 ist im Vergleich mit den bekannten Schiebe-Lagerungen eine vereinfachte, besonders staubverträgliche Konstruktion.The combination of oscillatingly rotatable guidance of the axle pin 10 with a simplified guidance of the second guide pin 11 and its cylindrical design prevents the hand tool from being switched on or off in an especially safe manner in difficult working or grip positions. In particular, the guidance of the axle pin 10 is a simplified, particularly dust-compatible construction in comparison with the known sliding bearings.

Claims (12)

  1. Electrical switch (1), especially for an electric hand-tool, having an actuating device (7), which is pivotable against the force of a first restoring spring (16), for a switch mechanism (2) exhibiting a cut-out lock and exhibiting a cut-in lock which comprises a guided and a guiding member (11, 19), of which switch the actuating device (7) is limitedly displaceable, against the force of a second restoring spring (17), transversely to the direction of swivel and the guiding member (19) is fixed to the housing (12) and the guided member (11) is fixed to the actuating device (7), characterized in that the actuating device (7) is mounted, at a distance from a first axis, rotatably about a second axis in the form of an axle bolt (10), which second axis is mounted on the housing (12) rotatably at least about the first axis in the form of a bearing bolt (13), in that the cut-in lock and the cut-out lock are a one-piece component part of a guide body (19), fixed to the housing, in which the guided member is a cylindrical guide bolt (11).
  2. Electrical switch according to Claim 1, characterized in that the guide body (19) exhibits a recess (20) forming a guide path for the second guide bolt (11), which guide path is accessible from the outside and is positively locked from the inside.
  3. Electrical switch according to Claim 1 and 2, characterized in that the profile of the recess (20) is symmetrical relative to a vertical reference plane.
  4. Electrical switch according to Claim 3, characterized in that the profile has a Z-shape.
  5. Electrical switch according to Claim 4, characterized in that the guide body (19) consists of dimensionally elastic material, such as PVC.
  6. Electrical switch according to Claim 5, characterized in that the second axis in the form of the axle bolt (10) is provided with an eyelet (15), which is mounted rotatably on the housing (12).
  7. Electrical switch according to Claim 6, characterized in that the second axis in the form of the axle bolt (10) is part of a rocker (28), which on the one side is connected in an articulated manner to the housing (12) and on the other side is connected in an articulated manner to the actuating device (7).
  8. Electrical switch according to Claim 7, characterized in that the rocker (28) comprises two mutually parallel axle bolts (29, 30) with an intermediate piece (31) which joins them rigidly together.
  9. Electrical switch according to Claim 8, characterized in that the resiliently elastic element (36, 38) is disposed between the second axis in the form of the axle bolt (10) and the first axis (13).
  10. Electrical switch according to Claim 9, characterized in that the resiliently elastic element (36, 38) is a sheet-metal shaped part (38).
  11. Electrical switch according to Claim 9, characterized in that the resiliently elastic element (36, 38) is a helical spring (36).
  12. Electrical switch according to Claim 1, characterized in that the second axis in the form of the axle bolt (10) is formed by two laterally angled-off end pieces of the legs (34) of a U-shaped bracket (32), the curved part (33) of which is mounted rotatably and displaceably on a counter-bearing (35) on the housing (12).
EP89119887A 1988-11-17 1989-10-26 Electrical switch for an electrical hand-held tool Expired - Lifetime EP0369221B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3838836 1988-11-17
DE3838836A DE3838836C1 (en) 1988-11-17 1988-11-17

Publications (3)

Publication Number Publication Date
EP0369221A2 EP0369221A2 (en) 1990-05-23
EP0369221A3 EP0369221A3 (en) 1991-09-11
EP0369221B1 true EP0369221B1 (en) 1994-09-28

Family

ID=6367305

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89119887A Expired - Lifetime EP0369221B1 (en) 1988-11-17 1989-10-26 Electrical switch for an electrical hand-held tool

Country Status (3)

Country Link
EP (1) EP0369221B1 (en)
JP (1) JP2783621B2 (en)
DE (2) DE3838836C1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4407418C2 (en) * 1994-03-03 1998-02-19 Black & Decker Inc Switch arrangement, especially for a router
DE10355102B3 (en) * 2003-11-24 2005-08-04 Itw-Befestigungssysteme Gmbh Switch with lockable rocker switch

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3564186A (en) * 1968-09-04 1971-02-16 Toro Mfg Corp Switch control mechanism
DE2315841C3 (en) * 1973-03-30 1981-11-19 Robert Bosch Gmbh, 7000 Stuttgart Actuating device arranged in the handle of a handheld power tool driven by an electric motor
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
IT7922984V0 (en) * 1979-10-29 1979-10-29 Star Utensili Elett PORTABLE ELECTRIC TOOL WITH PERFECTED CONTROLS.
DE3638952A1 (en) * 1986-11-14 1988-05-26 Marquardt Gmbh Electrical switch

Also Published As

Publication number Publication date
DE3838836C1 (en) 1990-05-10
EP0369221A3 (en) 1991-09-11
DE58908448D1 (en) 1994-11-03
JPH02189826A (en) 1990-07-25
JP2783621B2 (en) 1998-08-06
EP0369221A2 (en) 1990-05-23

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