EP1062673B1 - Electric switch - Google Patents

Abstract

The invention relates to an electric switch (4), especially for electric hand tools (1), such as electric drills, drilling hammers, electric screw drivers or similar. The switch (4) has an actuating mechanism (5) which can be moved out of a starting position into an operating position. In its operating position, the actuating mechanism (5) switches a contact system or adjusts a potentiometer, for example. The switch (4) also has a moveable actuating element (13) which when moved, activates a first device. The element (13) is located in the direct proximity of the actuating mechanism (5) and is also used to activate a second device.

Description

The invention relates to an electrical device with an electrical switch according to the preamble of Claim 1.

Such electrical switches are used in particular in electric hand tools, such as Electric drills, rotary hammers, electric screwdrivers or the like, for switching on and off of the electric motor and possibly for speed control of the electric motor used.

From DE-OS 24 10 871 an electrical switch with a housing is known in which a contact system is arranged. There is a manual handle on the housing Actuator movably mounted, which the user in an actuation or. Operating position is movable. In the operating position, the actuator acts on the The contact system then switches on. To lock the actuator in the In the operating position, the switch also has a locking device. The locking device consists of a slide connected to the actuator, which on a Side wall of the housing is guided, and one movable on the side wall of the housing stored actuator. By manual movement of the actuator in is substantially perpendicular to the side wall of the housing in the operating position of the Actuator the actuator for locking the actuator in Interaction with the actuator can be brought.

The actuating element for the known locking device is located on the Side wall of the switch housing. In some cases when salting in the Electric hand tool the manual handling of the actuating element can be difficult.

A switch for a power tool with a side operated by a plunger Locking device is also known from US-A-3 814 886. The switch also points a switch for reversing the direction of rotation of the power tool. A knob for actuating the switch is concentric with a sleeve for receiving the Tappet arranged. The rotation of the knob around the sleeve moves you Contact slide, which is connected to the rotary knob by means of a joint, whereby the switch for polarity reversal of the electric motor is operated. With the pestle for the locking device and the rotary knob for the switch to reverse the direction of rotation are two separate, different actuators. by virtue of the lateral arrangement of the two actuators can in turn be manual Operability may be difficult.

Furthermore, an electrical switch for electrical devices is known from US Pat. No. 4,097,703 which an actuator can be moved from an initial position into an operating position, so that the actuator in the operating position switching to a contact system and acts on a potentiometer. The switch has a movable one Actuating element that actuates a first locking device when it moves acts on the switch. For electrical devices with a reversible electric motor that This switch is equipped with two opposite directions of rotation an additional switching element for switching the direction of rotation. This additional Switching element is by one on the back of the switch, which is the actuator as well as opposite the actuating element. Slider actuated. Here too the actuation of the actuator, actuator and slide when using the Electrical equipment difficult for the user. In particular, there is a risk of Operating errors.

So-called universal motors are generally used for electrical appliances. With these Universal motors are the carbon brushes that anchor the current through the collector feed, adjusted at a certain angle from the neutral position to in one Direction of rotation to optimize motor operation. To also in the other The direction of rotation of the electric motor can still be optimized Electric motor can be arranged a device for adjusting the carbon brushes.

DE 195 45 651 A1 describes a device for adjusting the carbon brushes for the Electric motor known according to its direction of rotation. This adjustment device the carbon brush has a swiveling one. Carrier, on the brush holder for the the collector of the electric motor grinding carbon brushes are arranged. The carrier is can be pivoted manually by means of an actuating element. In this device for. Adjustment of the carbon brushes can be done by the electrical switch for the Direction of rotation of the electric motor can be integrated.

To start up the electrical device, the user must change the direction of rotation of the Device for adjusting the carbon brushes located actuator adjust. Next is to operate the electrical device, the actuator of the electrical Switch operated manually by the user. Both the electrical switch as well the device for adjusting the carbon brushes are different from each other arranged relatively far away places of the electrical device, with which in use of the electrical device, the manual handling of the actuating element can be difficult.

Finally, EP-A2-0 057 414 describes an electric hand tool with a pusher owning switch known, with a switch for the switch in addition Direction of rotation of the electric hand tool is arranged. The switch is by means of a Push handle on a pivotable axis, on the top of the handle arranged lever is attached, actuated. There is also a brush holder. Brush holders for the electric motor adjustable in the housing of the electric hand tool arranged. When swiveling the lever to actuate the switch the brush holder is adjusted at the same time. There is a fork element on the lever for this purpose cooperates with an axle stub on the brush holder of the brush holder.

In this known electric hand tool are by means of the lever Actuator operated two devices simultaneously, namely the one Adjustment device for the brush holder and on the other hand the switch for the Direction of rotation of the electric motor. Independent actuation of the two However, facilities do not allow the lever, so that the manual handling of the Actuator is severely restricted.

Starting from EP-A2-0 057 414, the invention is based on the object of the electrical appliance to develop in such a way that the operation for is easier and more convenient for the user.

This task is performed in a generic electrical device by the characterizing Features of claim 1 solved.

The electrical switch of the electrical device according to the invention has a movable actuating element that is arranged in the immediate vicinity of the actuator. When moving the Actuating element acts on a first device on the switch. In addition, a further second device can be actuated by means of the actuating element. The actuating element is for actuating the first device in a first direction and movable in a second direction to actuate the second device, the two Directions are different, so that the actuator is a kind of Represents multi-function lever. Further refinements of the invention are the subject of Dependent claims.

One of these two directions can be within an angular range of less than +/- 90 degrees Direction of movement of the actuator. The angle is preferably to Direction of movement of the actuator up to a maximum of +/- 15 degrees. In particular that is Actuator movable approximately in the direction of the actuator.

The actuating element can be used for particularly good handling right at the top of the actuator, about at the transition between the housing body and the handle for the power tool. It is Actuating element designed as a push button, lever or the like. while the switch actuator is is a pusher. The actuator is then through Press essentially in the direction of movement of the handle movable.

If one of the two institutions is one Locking device, so the actuator for Actuation of the locking device different from the Perpendicular to the direction of movement of the actuator be agile. The power tool is often both in Can be operated clockwise and counterclockwise. Then it offers itself indicates that the electrical switch is a changeover switch for the Right-left run of the power tool as one of the two Includes facilities. The switch has one for example, can be pivoted by up to approx. +/- 15 degrees opposite to the direction of movement of the actuator stored switch lever. It may be advisable the shift lever for right-left running simultaneously as Form actuating element for the locking device. The switch lever is then for locking in it Movable in the longitudinal direction. The switch lever can be in two parts be designed such that a first part can be pivoted and the other second part with both the first part pivotable as well as against a restoring force is linearly movable radially to pivot.

In a further development, the locking device has a locking element movable by means of the actuating element. The locking element is movable on the switch housing stored and engaged by the actuator Movement path of the actuator for locking the Actuator bringable. The locking element is still with provided with a hook that can be locked to a Barrier area, an undercut or the like on the actuator attacks. Of course, the hook can also be attached to one the actuator connected part, such as a side on Attack the housing of the switch-guided slide. by virtue of the interaction between the hook and the locking surface is by a restoring force in the operating position caused backward movement of the actuator and thus locking the actuator in the operating position.

In one embodiment, the locking element can be a spring-loaded, linear on a housing part of the switch be movably mounted sliding element. there it makes sense to the housing part at the transition of the Switches for the right-left run and the actuator to arrange associated walls of the housing. The Sliding element is approximately parallel to that Actuator facing wall of the housing in the housing part guided. Furthermore, the sliding element on the first End that of the switch for the right-left run associated wall of the housing facing away, a hook. A wedge surface on the actuator, which is particularly on the linearly movable, second part of the switch lever located, acts with the second end of the sliding element, the assigned to the switch for the right-left run Wall of the housing is facing together. This will make it Sliding element by the movement of the actuator so moved that the hook to lock on a if appropriate, shoulder-shaped blocking area on Actuator in the operating position of the Actuator attacks.

In another embodiment, the locking element is as a on the housing of the switch, for example on the Switches for the wall of the right-left run Housing, rotatably mounted lever element. from Lever element is approximately parallel to that Actuator facing wall of the housing extending Arm with a hook approximately vertically. A cam on Actuator, which is particularly linear Movable, second part of the switch lever is located into a setting on the lever element. This will make it Lever element in the movement of the actuator so pivots that the hook for locking a locking surface on the actuator, for example on the side Slider is in the operating position of the Actuator engages behind.

It can also be one of the two facilities a device for adjusting the carbon brushes for the Act electric motor, this device by means of movable actuator is adjustable. The Device for adjusting the carbon brushes can swiveling carrier for holding the brush holder have, with a coupling element between the Actuator and the carrier is arranged. The Coupling element can be designed in the manner of a transmission be or from a toggle, rocker arm, one Kippsprungwerk or the like exist.

In particular, it is also preferred if that Actuator for the device for adjusting the Carbon brushes in the manner of a multi-function lever is trained. In addition to operating the device for Adjustment of the carbon brushes can be done with this Multifunction lever at the same time the switch for the Reversal of rotation can be switched and the actuation a locking device for the actuator in Operating position.

The advantages achieved with the invention exist in particular in that only one actuator for several functions, for example for locking, Adjustment of the carbon brushes and switching of the Direction of rotation, is present. On the one hand, this results in one considerable cost savings. Secondly, at the same time the ergonomics for the user when handling the Electrical equipment increased and the functions mentioned Switches are easier to use for the user. in the Otherwise there are also incorrect operations by the user avoided and risk of accidents when using the electrical device reduced. For example, the Change of direction by the actuator be locked when the actuator of the switch is operated.

In addition to the actuator of the switch, that can also Actuator for the locking device and / or for the direction switch and / or for the device for Adjustment of the carbon brushes in the handle of the electrical device be included. Advantageously, the Switch holding handle of the power tool be designed symmetrically. Of particular note is that in particular the locking for legal how left-handed is suitable, what with the previous switch is not the case.

In addition, there is no additional opening in the handle of the Power tool such as for the past Actuating element of the locking device and / or Adjustment device for the carbon brushes and / or the Direction switch required. This will not only a more pleasing appearance of the electrical device or the Handle achieved, but also improved protection from the penetration of foreign bodies such as dust, moisture or the like Like., in the electrical device. It will also be premature Failure of the electrical device and / or the switch and / or of the facilities mentioned at the counter prevented and their Lifetime increased.

Fig. 1

schematisch den Gehäusekörper einer Elektrobohrmaschine entsprechend einer ersten Ausführung,

Fig. 2

einen elektrischen Schalter mit Arretierfunktion in Seitenansicht, wobei der Bereich des Umschalters im Teilschnitt dargestellt ist,

Fig. 3

den elektrischen Schalter aus Fig. 2 in Draufsicht, wobei lediglich der Umschalthebel gezeigt ist, während der restliche Umschalter weggelassen ist,

Fig. 4

einen Teil eines elektrischen Schalters mit Arretierfunktion in Seitenansicht in einer weiteren Ausführung, wobei der Bereich des Umschalters im Teilschnitt dargestellt ist,

Fig. 5

den elektrischen Schalter aus Fig. 4 in Draufsicht, wobei der Umschalthebel zu sehen ist und der restliche Umschalter teilweise weggebrochen dargestellt ist,

Fig. 6

schematisch den Gehäusekörper einer Elektrobohrmaschine entsprechend einer zweiten Ausführung,

Fig. 7

den Gehäusekörper in Richtung VII von Fig. 6 gesehen,

Fig. 8

den Gehäusekörper wie in Fig. 6, wobei das Kopplungselement in einer ersten Ausführungsform in der Art eines Getriebes ausgestaltet ist,

Fig. 9

das Kopplungselement aus Fig. 8 schematisch links in Draufsicht und rechts in Seitenansicht,

Fig. 10

das Kopplungselement in einer weiteren Ausgestaltung in der Art eines Kniehebels, wobei links die mittlere Position des Betätigungselements und rechts dessen verschwenkte Positionen dargestellt sind,

Fig. 11

den Kniehebel aus Fig. 10 als Einzelteil, wobei links die Draufsicht und rechts die Seitenansicht dargestellt sind,

Fig. 12

das Kopplungselement in noch einer weiteren Ausgestaltung in der Art eines Kipphebels, wobei links die Draufsicht und rechts die Seitenansicht dargestellt sind, und

Fig. 13

das Kopplungselement in nochmals einer anderen Ausführungsform in der Art eines Kippsprungwerks, wobei links die Draufsicht und rechts die Seitenansicht zu sehen sind.

Embodiments of the invention are shown in the drawings and are described in more detail below. Show it

Fig. 1

schematically the housing body of an electric drill according to a first embodiment,

Fig. 2

an electrical switch with locking function in side view, the area of the switch is shown in partial section,

Fig. 3

2 in top view, only the switch lever being shown, while the rest of the switch is omitted,

Fig. 4

a part of an electrical switch with locking function in a side view in a further embodiment, the area of the switch being shown in partial section,

Fig. 5

4 in top view, the switch lever being visible and the rest of the switch being shown partly broken away,

Fig. 6

schematically the housing body of an electric drill according to a second embodiment,

Fig. 7

seen the housing body in the direction VII of Fig. 6,

Fig. 8

6, the coupling element in a first embodiment being designed in the manner of a gear,

Fig. 9

8 shows the coupling element from FIG. 8 schematically on the left in top view and on the right in side view,

Fig. 10

the coupling element in a further embodiment in the manner of a toggle lever, the middle position of the actuating element being shown on the left and its pivoted positions on the right,

Fig. 11

10 as an individual part, the top view being shown on the left and the side view on the right,

Fig. 12

the coupling element in yet another embodiment in the manner of a rocker arm, the top view being shown on the left and the side view being shown on the right, and

Fig. 13

the coupling element in yet another embodiment in the manner of a toggle mechanism, the top view on the left and the side view on the right.

1 schematically shows a housing body 2 for a Electric hand tool 1, namely for a Electric drill to be seen. Located in the housing body 2 a not shown here, for example in Fig. 6 visible electric motor 36, which is connected via a power supply line 3 is supplied with voltage. To switch the Electric motor 36 is used in the housing body 2, in Fig. 1 also only schematically indicated electrical Switch 4. For operation, switch 4 has an on Handle 15 of the housing body 2 located in the direction the arrows 6, 6 'movable actuator 5, which as manual handling for the user. Of course can such a switch 4 also in another Electric hand tools, for example in rotary hammers, Electric screwdrivers, electric circular saws or the like, used become.

As can be seen in more detail in FIG. 2, the switch 4 has one Housing 7 with a front wall 8, several to the front wall 8 adjoining side walls 9, 9 'and a rear wall 10. The actuator 5 movably mounted on the housing 7 is facing the front wall 8 and with one in the housing 7 reaching transmission element 11 (see Fig. 1) rigid coupled. At least inside the housing 7 a contact system not shown in detail for input and Switching off the electric motor 36 of the electric hand tool 1.

Such contact systems are for example from DE-OS 28 38 934 known, so that a closer look at this is not necessary is. If necessary, a housing 7 Potentiometer, electronics or the like for controlling the Electric motor 36 with a user-adjustable Speed and / or to control other functions of the electric motor 36 may be arranged.

As already stated, the actuator 5 is from Users from an unactuated home position towards the arrow 6 movable. In a certain movement position, which is referred to in the following operating position, that works Actuator 5 by means of the transmission element 11 switching to the contact system and / or to the Potentiometer or the like, whereby the electric motor 36 switched on and / or at a certain speed is controlled. If the user leaves the actuator 5 going on, this moves due to an acting one Restoring force in the direction of arrow 6 'in the unactuated Starting position back so that the electric motor 36th is switched off.

The switch 4 also has a locking device 12, the for locking the actuator 5 in the Operating position in cooperation with the actuator 5 can be brought. The locking device 12 then prevents a return movement of the actuator 5 from the Operating position in the direction of arrow 6 ', so that the Electric motor 36 remains on when the user does so Let go of actuator 5. The locking device 12 is by means of a manually movable actuator 13 from User operated.

Unlike electrical switches with a conventional one Locking device on a side wall of the housing located and approximately perpendicular to the direction of movement of the Actuator is actuated, the locking device 12 of the switch 4 according to the invention essentially that Actuator 5 facing. That’s it Actuating element 13 of the locking device 12 in arranged in the immediate vicinity of the actuator 5. Further is the actuating element 13 of the locking device 12 deviating from the perpendicular to the direction of movement 6, 6 ' of the actuator 5 movable. It is preferably Actuator 13 approximately in the direction of movement 6, 6 'of Actuator 5 movable. How to do well with reference to FIG. 1 sees, is the actuator 13 through this design with the same hand that also operates the actuator 5, movable. This makes operation for the user simpler and more ergonomic, which reduces the risk of accidents Use of the electric drill 1 reduced. Is further the locking device 12 equally good for legal as Left-handed manageable.

To the actuator 13 in a simple manner like that To be able to operate actuator 5 by the user is that Actuator 13 within an angular range +/- α movable to the direction of movement 6, 6 'of the actuator 5, as can be seen from FIG. 3. It is preferred the angle α to the direction of movement 6, 6 'of Actuator 5 less than +/- 90 degrees and is up to maximum +/- 15 degrees. The actuator 5 of the switch 4th is expediently designed as a pusher. The Actuating element 13 of the locking device 12 can be used as Push button, designed as a rotatably mounted lever or the like his. In such an embodiment, it is Actuator 13 of the locking device 12 then preferably by pressing in a direction 6 '', which in the essentially in the direction of movement 6 of the handle 5 or runs parallel to the direction of movement 6, movable. The Actuator 13 of the locking device 12 is direct arranged on the top 14 of the actuator 5. It lends itself to the actuating element 13 approximately on Transition between the housing body 2 and the handle 15 to be arranged for the electric drilling machine 1, as shown in FIG. 1 emerges in more detail.

If the electric hand tool is one Electric drill 1, its electric motor 36 is in the Usually reversible in two opposite directions of rotation, namely to operate both clockwise and counterclockwise. For this purpose, the electrical switch 4 has a changeover switch 16 for the right-left run. As can be seen in Fig. 3, the changeover switch 16 by means of a rotary bearing 35 pivoted switch lever 17 actuated. The Switch lever 17 is counterclockwise by one Angle -α with respect to the direction of movement 6 for switching on counterclockwise and clockwise by an angle + α opposite to the direction of movement 6 for switching on Clockwise rotation swiveling. The angle +/- α can for example up to approximately +/- 15 degrees.

In such an embodiment, it is particularly advantageous the switch lever 17 for right-left running at the same time as an actuating element 13 for the locking device 12 train. For this purpose, the switch lever 17 is next to it Swiveling for switching between right and Counterclockwise rotation for actuating the locking device 12 in it Movable longitudinally formed by the switching lever 17 is preferably configured in two parts. A first part 18 of the switching lever 17 is pivotable and the other one second part 19 is both with the first part 18th pivotable as well as approximately radially for pivoting linearly movable. The linear movement of the second part 19 takes place against the restoring force of a spring 20, as described in more detail in Fig. 2 is shown.

The locking device 12 also has a means of Actuator 13 movable locking element 21. Das Locking element 21 is movable on the housing 7 of the switch 4 stored. The locking element 21 is now through Actuator 13 in engagement with the in Direction of movement 6, 6 'running path of the Actuator 5 for locking the actuator 5 brought. For this purpose, the blocking element 21 has a hook 22 Mistake. The hook 22 engages to lock one Barrier area 23, an undercut or the like on Actuator 5 on. Of course, the hook 22nd also on a part connected to the actuator 5, like a guided laterally on the housing 7 of the switch 4 Attack slide 24. By the interaction of the hook 22 with the locking surface 23 is the return movement of the Actuator 5, which by the on the actuator 5th acting restoring force in the operating position is prevented.

According to a first embodiment, which is also in the 2 and 3 can be seen in more detail, the locking element 21 as a sliding element 25 loaded with a spring 26 educated. The sliding element 25 is on a housing part 27 of the switch 4 mounted linearly movable, which Housing part 27 at the transition of the switch 16 for the Right-left run and the actuator 5 associated Walls 8, 9 'of the housing 7 is arranged. The Sliding element 25 is approximately parallel to that Actuator 5 facing front wall 8 of the housing 7 in Housing part 27 out. The hook 22 is on the first End 28 of the sliding element 25, the first end 28 of the Side wall 9 'of the housing 7 facing away from the Switch 16 is assigned for the right-left run. A Wedge surface 30 on the actuating element 13, specifically on the linear Movable, second part 19 of the switch lever 17 cooperates the second end 29 of the sliding element 25 together, wherein the second end 29 of the side wall 9 'of the housing 7 facing is the switch 16 for the right-left run assigned. This interaction takes place in such a way that Sliding element 25 when the actuating element 13 moves is moved by means of the wedge surface 30 so that the hook 22 for locking on the locking surface 23 in the Operating position of the actuator 5 attacks. The Blocking surface 23 is designed and located on the side slide 24.

The locking element 21 according to a further embodiment is shown in Figs. 4 and 5. Here is the locking element 21 as a rotatably mounted on the housing 7 of the switch 4 Lever element 31 formed. The lever element 31 is on the Side wall 9 'of the housing 7 mounted, the switch 16 is assigned for the right-left run. From the lever element 31 stands approximately parallel to the front wall 8 of the housing 7, which faces the actuator 5, extending arm 32 with a hook 22 approximately vertically. A cam 33 am Actuator 13 on the linearly movable, second Part 19 of the switching lever 17 engages in one in FIG. 5 visible backdrop 34 on the lever element 31 such that the Lever element 31 with linear movement of the actuating element 13 is pivoted. This pivoting takes place so that the Hook 22 for locking a surface, namely the Locking surface 23 on the side slide 24 in the Operating position of the actuator 5 engages behind. Of course, the hook 22 can also be another Reach behind the surface on the actuator 5.

As can be seen, the two designs Locking the actuator 5 in the operating position by the interaction of the hook 22 with the blocking surface 23 on the actuator 5 or on an actuator 5 assigned part and the actuator 5 acting restoring force that the actuator 5 in Direction of movement 6 'applied to its initial position, causes.

The switch 4 according to the invention is thus characterized from that in the immediate vicinity of the actuator 5 arranged actuating element 13 actuating a first Device acts and in addition to actuating a serves another second facility. To operate the first The actuation element 13 is in a first device Movable direction. To operate the second device is the actuating element 13 additionally in a second direction movable, the second direction different from first direction is. According to the above Embodiments are one of the two Devices around a switch 16 for the direction of rotation, i.e. for the right-left run of the electric motor 36, with what the switch 16 by means of the movable actuating element 13 is switchable. It can just as well be one of the both devices also around a locking device 12 act to lock the actuator 5 in the Operating position in cooperation with the actuator 5 can be brought. This is preferably Actuating element 13 for actuating the locking device 12 deviating from the perpendicular to the direction of movement 6, 6 ' of the actuator 5 movable.

According to a further embodiment, the following is described in more detail, it is one of the two devices around a device 37 for adjustment the carbon brushes for the electric motor 36 accordingly Rotation. As can be seen from Fig. 6, the Device 37 for adjusting the carbon brushes on Electric motor 36 arranged so as to the carbon brushes Adjust optimization compared to the neutral zone can. Such devices 37 for adjusting the Carbon brushes are known from DE 195 45 651 A1, whereupon is referred to here.

The device 37 for adjusting the carbon brushes a pivotable carrier 38, on which in FIG. 9 brush holder 39 shown as an example for the on the Collector 41 of the electric motor 36 carbon brushes 40 are arranged. To adjust the device 37 and to pivot the carrier 38 according to the The direction of rotation of the electric motor 36 serves the movable Actuator 13, the invention in immediate Proximity of the actuator 5 of the switch 4 is arranged.

The actuating element 13 is by pivoting in Swivel direction 42 by a certain angle +/- α operable, as is apparent from Fig. 7. This is the Actuator 13 formed as a lever which is rotatable on Switch 4 and that is mounted on the housing 7. to Transfer of the movement of the actuator 13 to the Carrier 38 for pivoting it is only one in FIG. 6 schematically drawn coupling element 43 between the Actuating element 13 and the carrier 38 are arranged. details Embodiments of the coupling element 43 are shown in FIG. 8 to see 13.

The coupling element 43 shown in FIGS. 8 and 9 is in the Type of gear 44 is formed. For this purpose, the carrier 38 provided with a toothing 45 on the circumference, as shown in more detail Fig. 9 emerges. A toothed wheel engages in the toothing 45, for example, an asymmetrical spur gear 46. This in turn engages by means of a type of cam 47 Actuating element 13 in the spur gear 46. So that will the pivoting of the actuator 13 on the Gear 44 by means of a tooth-tooth operative connection or Transfer cam-tooth operative connection to the carrier 38. Of course, the transfer of Swiveling movement also a cam-cam operative connection o. Like. Be used.

In a further embodiment, which in FIGS. 10 and 11 can be seen, the coupling element 43 consists of a Toggle lever 48. The on a pivot 49 in the housing body 2nd rotatably mounted toggle lever 48 engages at one end by means of a kind of fork 50 a pin 51 on the carrier 38. Das the other end of the toggle lever 48 is guided by a link 52, for example in the manner of an inclined plane is designed. When the actuating element is pivoted 13, the toggle lever 48 is correspondingly in the backdrop 52 guided and rotates about the pivot 49, so that finally the carrier 38 by means of the operative connection between Fork 50 and pin 51 is pivoted.

In yet another embodiment shown in FIG. 12 the coupling element 43 consists of a rocker arm 53. A The end of the rocker arm 53 in turn has a fork 50 and a pin 51 existing operative connection to the carrier 38 on. The other end of the rocker arm 53 is by means of a Pivot bearing 54 is articulated on the actuating element 13. The Pivoting of the actuating element 13 in The pivoting direction 42 causes the rocker arm 53 to rotate around the rotary bearing 54, so that this by a stop 55 in Housing body 2 tilted, which in turn ultimately Swiveling of the carrier 38 can be effected.

The coupling element 43, which in yet another Forming a type of toggle 56 is shown in Fig. 13 shown. The toggle 56 consists of two Rotary levers 57, 58, the one rotary lever 57 by means of a Active connection from a fork 50 and a pin 51 on Carrier 38 is articulated. The other rotary lever 58 is by means of a pivot bearing 54 is articulated on the actuating element 13. The two mutually facing ends of the rotary levers 57, 58 coupled to one another by means of a tension spring 59. A Pivoting of the actuating element 13 in Swiveling direction 42 leads to a tilting of the Rotary lever 58 at the stop 55 in the housing body 2, which is due the tension spring 59 when a dead center is exceeded abrupt rotary movement of the rotary lever 57 leads. The Rotary movement of the rotary lever 57 then causes Pivoting of the carrier 38.

By means of the actuating element 13 is advantageously at the same time an electrical switch for Reversal of the direction of rotation of the electric motor 36 switchable. This Switch for reversing the direction of rotation can, like the changeover switch 16 designed according to the first embodiment be, but it is advisable to Switch for reversing the direction of rotation in the device 37 for Integrate adjustment of the carbon brushes.

In this case, the switch for reversing the direction of rotation on the carrier 38 with the carbon brushes 14 in electrical Connected switching contacts arranged. The Device 37 for adjusting the carbon brushes also has a stationary contact plate 60 shown in FIG Establishment of fixed contacts with the field windings 61 of the electric motor 36 are in electrical connection. The Fixed contacts act as counter contacts with the switch contacts in an alternate contacting of the carbon brushes 40 to Reversal of the direction of rotation of the electric motor 36 when pivoting of the carrier 38 together. To defined switching positions for To get the switch to reverse the direction of rotation, it is useful if the by pivoting the carrier 38 by the interaction of the switch contacts and the fixed contacts adjustable switching positions designed as locking positions are. Incidentally, for the more detailed training of such Switch for reversing the direction of rotation in turn on the DE 195 45 651 A1 referenced.

Furthermore, it can be advantageous if also here of the actuating element 13 simultaneously in FIG. 6 shown, as configured in the first embodiment Locking device 12 for the operating position of the Actuator 5 is actuated. The locking element 21 of the Locking device 12 which for locking the Actuator 5 in the operating position in Cooperation with the actuator 5 can be brought by a movement of the actuating element 13 deviating from the direction of movement of the actuator 13 for the Pivotal movement of the carrier 38. In particular that is Actuating element 13 for moving the blocking element 21 approximately according to arrow 6 '' in the direction of the actuator 5 movable by pressing against the spring 20.

The invention is based on an electric hand tool explained, but not to the described and illustrated embodiments limited. So the invention not only encompasses power tools, but also others Electrical devices, for example hand mixers, Electric knife or the like for the household.

LIST OF REFERENCE NUMBERS

1:

Electric drill / electric hand tool

2:

Housing body (for electric drill)

3:

mains supply

4:

electrical switch

5:

actuator

6,6 ':

Arrow / direction of movement (from actuator)

6 '':

Arrow / direction of movement (of actuator)

7:

Housing (from switch)

8th:

Front wall (of housing)

9,9 ':

Side wall (of housing)

10:

Rear wall (of housing)

11:

transmission element

12:

locking

13:

actuator

14:

Top (from actuator)

15:

handle

16:

Changeover switch (for right-left rotation)

17:

Switching lever

18:

first part (from switch lever)

19:

second part (from shift lever)

20:

Spring (on the second part)

21:

blocking element

22:

Hook (on the locking element)

23:

blocking surface

24:

pusher

25:

sliding element

26:

Spring (for locking element)

27:

Housing part (from switch)

28:

first end (of sliding element)

29:

second end (from sliding element)

30:

Wedge surface (on the actuator)

31:

lever member

32:

Arm (on lever element)

33:

Cams (on the switching lever)

34:

Backdrop (on the lever element)

35:

Pivot bearing (for switch lever)

36:

electric motor

37:

Device for adjusting the carbon brushes

38:

Carrier (on device for adjusting the Carbon brushes)

39:

brush holder

40:

carbon brush

41:

Collector (of electric motor)

42:

pivoting

43:

coupling element

44:

Gear (for coupling element)

45:

Gearing (on carrier)

46:

spur gear

47:

cam

48:

toggle

49:

Pivot (from toggle)

50:

fork

51:

Spigot (on support)

52:

scenery

53:

rocker arm

54:

pivot bearing

55:

Stop (on the housing body)

56:

tilt mechanism

57.58:

Rotary lever (from toggle)

59:

mainspring

60:

Contact plate (on device for adjusting the Carbon brushes)

61:

Field winding (from electric motor)

Claims (18)

1. Electric appliance, in particular hand-held power tool (1) such as a power drill, hammer drill, electric screwdriver or the like, with an electric switch (4) which comprises an actuating member (5) which can be moved in the movement direction (6, 6') between a starting position and an operating position, the actuating member (5) acting in the operating position on a contact system in a switching manner, on a potentiometer or the like in an adjusting manner, and with a movable actuating element (13) arranged in the immediate vicinity of the actuating member (5), the actuating element (13) acting during movement thereof on a first device in an actuating manner and additionally, on a further second device, characterised in that the actuating element (13) is designed in two parts, a first part (18) being movably mounted in a second direction (42) and the other second part (19) being movable with the first part (18) both in the second direction (42) and in a first direction (6'') different to the second direction (42) in such a way that upon movement of the actuating element (13) in the first direction (6'') the first device is actuated and upon movement of the actuating element (13) in the second direction (42) the second device is actuated.
2. Electric appliance according to claim 1, characterised in that the actuating element (13) can be moved within an angle range (+/-α) to the movement direction (6, 6') of the actuating member (5), the angle (+/-α) to the movement direction (6, 6') of the actuating member (5) in particular being less than +/- 90° and preferably, up to a maximum of +/-15°, in particular in such a way that the actuating element (13) can be moved substantially in the direction of the actuating member (5).
3. Electric appliance according to claim 1 or 2, characterised in that the actuating element (13) is arranged directly on the top (14) of the actuating member (5), in particular substantially on the transition between the housing body (2) and the handle (15) for the electric appliance, in that the actuating element (13) is preferably designed as a pushbutton, as a rotatably mounted lever or the like, and in that the actuating member (5) of the switch (1) is also preferably designed as a trigger and is arranged, in particular, on the housing (7) of the switch (4), the actuating element (13) in particular being movable by pressing substantially in the movement direction (6, 6') of the trigger, by pivoting or the like.
4. Electric appliance according to any one of claims 1 to 3, characterised in that the electric appliance comprises a reversible electric motor (36) which can be operated in two opposing directions of rotation and in that one of the two devices is a changeover switch (16) for the direction of rotation (bi-directional rotation) of the electric motor (36), wherein the changeover switch (16) can be changed over by means of the movable actuating element (13).
5. Electric appliance according to any one of claims 1 to 4, characterised in that one of the two devices is a locking device (12) which can be brought into cooperation with the actuating member (5) to lock the actuating member (5) in the operating position, and in that, in particular, the actuating element (13) can be moved to actuate the locking device (12) diverging from the perpendicular towards the movement direction (6, 6') of the actuating member (5).
6. Electric appliance according to any one of claims 1 to 5, characterised in that the actuating element (13) designed as a reversing lever (17) for the changeover switch is pivotally mounted, in particular by up to approximately +/- 15° with respect to the movement direction (6, 6') of the actuating member (5), in that the reversing lever (17) can be moved for actuation of the locking device (12) in the longitudinal direction thereof, and in that the first part (18) of the two-part reversing lever (17) is preferably pivotal and the other second part (19) is pivotal both with the first part (18) and can also be moved linearly against a restoring force substantially radially to the pivoting movement.
7. Electric appliance according to claim 5 or 6, characterised in that the locking device (12) has a locking element (21) which can be moved by means of the actuating element (13), in that the locking element (21) is preferably movably mounted on the housing (7) of the switch (4) and in that the locking element (21) can also preferably be brought into engagement with the movement path of the actuating member (5) to lock the actuating member (5) by the actuating element (13).
8. Electric appliance according to claim 7, characterised in that the locking element (21) is provided with a hook (22), in that the hook (22) acts on a locking face (23), an undercut or the like on the actuating member (5) or a part connected to the actuating member (5), such as a slide (24) guided laterally on the housing (7) of the switch (4) for the purpose of locking, in such a way that the return movement of the actuating member (5) caused by a restoring force in the operating position is prevented.
9. Electric appliance according to claim 7 or 8, characterised in that the locking element (21) is designed as a spring-loaded sliding element (25) mounted on a housing part (27) of the switch (4) so as to be linearly movable, the housing part (27) in particular being arranged on the transition between the walls (9', 8) of the housing (7) associated with the changeover switch (16) for bi-directional rotation and the actuating member (5), in that the sliding element (25) is guided substantially parallel to the front wall (8) of the housing (7) facing the actuating member (5) in the housing part (27), in that the sliding element (25) comprises a hook (22) on the first end (28) which is remote from the side wall (9') of the housing (7) associated with the changeover switch (16) for bi-directional rotation, in that a slanting face (30) on the actuating element (13), in particular on the linearly movable second part (19) of the reversing lever (17) cooperates with the second end (29) of the sliding element (25) which faces the side wall (9') of the housing (7) associated with the changeover switch (16) for bi-directional rotation in such a way that the sliding element (25) is displaced by the movement of the actuating element (13) in such a way that the hook (22) for locking to a locking face (23) acts on the actuating member (5), in particular on a lug-shaped face on the lateral slide (24), in the operating position of the actuating member (5).
10. Electric appliance according to claim 7 or 8, characterised in that the locking element (21) is formed as a lever element (31) rotatably mounted on the housing (7) of the switch (4), in particular on the side wall (9') of the housing (7) associated with the changeover switch (16) for bi-directional rotation, in that an arm (32) with a hook (22), extending substantially parallel to the front wall (8) of the housing (7) facing the actuating member (5), protrudes substantially perpendicularly from the lever element (31), in that a cam (33) on the actuating element (13), in particular on the linearly movable second part (19) of the reversing lever (17) engages in a connecting link (34) on the lever element (31) in such a way that the lever element (31) is pivoted by the movement of the actuating element (13) in such a way that the hook (22) for locking a locking face (23) engages behind the actuating member (5), in particular the lateral slide (24), in the operating position of the actuating member (5).
11. Electric appliance according to any one of claims 1 to 10, characterised in that one of the two devices is a device (37) for adjusting the carbon brushes for the electric motor (36) in accordance with the direction of rotation thereof, wherein the device (37) for adjusting the carbon brushes can be adjusted by means of the movable actuating element (13).
12. Electric appliance according to claim 11, characterised in that the device (37) for adjusting the carbon brushes has a pivotal carrier (38) on which brush holder (39) for the carbon brushes (40) rubbing on the collector (41) of the electric motor (36) are arranged, and in that the carrier (38) can be pivoted by means of the actuating element (13).
13. Electric appliance according to claim 12, characterised in that a coupling element (43) is arranged between the actuating element (13) and the carrier (38) in such a way that the movement of the actuating element (13) can be transmitted to the carrier (38) for the pivoting thereof.
14. Electric appliance according to claim 13, characterised in that the coupling element (43) is designed in the manner of a gearing (44), for example with an asymmetric front end toothed wheel (46), the gearing (44) having a tooth-tooth interaction, a cam-tooth interaction, a cam-cam interaction or the like.
15. Electric appliance according to claim 13, characterised in that the coupling element (43) consists of a toggle lever (48) which can be moved, for example, via a type of slanting plane, of a rocker (53), of a tilting overcentre device (56) or the like.
16. Electric appliance according to any one of claims 1 to 15, characterised in that the device (37) for adjusting the carbon brushes comprises the changeover switch for the direction of rotation of the electric motor (36).
17. Electric appliance according to claim 16, characterised in that switching contacts electrically connected to the carbon brushes (40) are arranged on the carrier (38), in that the device (37) for adjusting the carbon brushes comprises a stationary contact plate (60) for receiving the fixed contacts which are electrically connected to the field windings (61) of the electric motor (36), in that the fixed contacts cooperate with the switch contacts as counter-contacts in alternating contacting of the carbon brushes (40) for reversing the direction of rotation of the electric motor (36) upon pivoting of the carrier (38), and in that the switching positions which can be adjusted upon pivoting of the carrier (38) owing to the cooperation of the switching contacts and the fixed contacts, are preferably designed as latched positions.
18. Electric appliance according to any one of claims 1 to 17, characterised in that the actuating element (13) designed as a rotatable lever for pivoting the carrier (38) of the device (37) for adjusting the carbon brushes can be pivoted (42) between two positions, in particular latched positions, located within an angle range (+/-α) and in that the lever for actuation of the locking device (12) can be moved substantially radially to the pivoting movement (42) by pressing (6''), in particular against a restoring force.

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