WO2007079716A1

WO2007079716A1 - Electrical switch

Info

Publication number: WO2007079716A1
Application number: PCT/DE2006/002342
Authority: WO
Inventors: Daniel Hafen; Gerhard Niklewski
Original assignee: Marquardt Gmbh
Priority date: 2006-01-09
Filing date: 2006-12-27
Publication date: 2007-07-19
Also published as: EP1971991B1; CN101356611A; EP1971991A1; CN101356611B

Abstract

The invention relates to an electrical switch (1) for an electrical device, especially for electric tools, such as drills, grinders, saws, planes, angle grinders, or similar. Said electrical switch (1) comprises an actuating element (13) and a contact system, upon which the actuating element acts in a switching manner. The contact system and the actuating element (13) are configured as an autonomously operable switch unit (14) similar to a module. Said switch unit (14) can be disposed inside a mounting frame (15) which is used for fastening purposes in the electrical device. To this avail, the mounting frame (15) is provided with a receptacle for the switch unit (14), the size of said receptacle approximately matching the size of the switch unit (14).

Description

Electric switch

The invention relates to an electrical switch according to the preamble of patent claim 1.

Such switches are mainly used in electric hand tools, which have a powered by a voltage source electric motor, used as a power switch for switching on and off of the electric motor. These power tools may be drills, angle grinders, saws, planers, grinders, orbital sanders, screwdrivers, or the like.

From DE 197 08 939 Al, such an electrical switch for switching on and off of an electric tool is known. The usually arranged in the handle of the power tool switch has a housing in which a contact system is located. From the housing protrudes a movable actuator out, wherein the actuating element acts switching on the contact system. A disadvantage, it has been found that the housing and the actuator of the switch to the respective space in the power tool, in particular to adapt to the handle, so that a variety of device-specific switches is to provide. This increases the cost of the switch and requires increased storage. Furthermore, it has been found to be disadvantageous that the contact system consists of a variety of items. This increases the cost of the switch and causes a complicated assembly of the switch.

The invention has for its object to further develop the electrical switch such that it is suitable for different installation spaces, in particular in a simple manner to the respective electric tool is adaptable. Optionally, the electrical switch is to be further developed such that the number of individual parts is reduced.

This object is achieved in a generic electrical switch by the characterizing features of claim 1.

In the switch according to the invention, the contact system and the actuating element is designed as an independently functional switch unit in the manner of a module. The switching module-like switch unit can be arranged in one of the attachment in the electrical appliance serving mounting frame. For this purpose, the mounting frame preferably has a receptacle for the switch unit, wherein the receptacle expediently has a size corresponding approximately to the switch unit size, so that the switching module can be mounted in the mounting frame in a simple manner. It then suffices to announce the mounting frame and / or device specific, so that it is used in the manner of an adapter for installation in a variety of handles of power tools, while it is a kind of standardized base switch in a small design in the switch unit. Advantageously, this makes it possible to use one and the same base switch for a wide variety of power tools, thus making it possible to use the electric tool switch in a simple and flexible manner in various power tools. Further embodiments of the invention are the subject of the dependent claims.

The switch unit may have a housing in which all essential switch functions are included, whereby the switch unit is self-sufficient. On the switch unit, and in particular on the housing, the arrangement of electrical connection terminals for supplying and / or dissipation of the electrical voltage to and / or from the contact system offers. Furthermore, in the switch unit, in particular in its housing, a control and / or regulating electronics for the electric motor o. The like. Of the electrical appliance may be arranged. The switch unit then serves primarily as a self-functioning and ready-to-connect base module for example power tools. The electrical connection terminals on the switch unit can correspond to electrical mating connections arranged on the installation frame, in particular in the manner of plug connectors. In this way, when the switch unit is arranged on the mounting frame, an electrical connection can be produced between the electrical connection connections and the electrical counter connections, with which a type of extension of the connections to the switch unit can be achieved. Of course, the leads in the electrical appliance can also be connected directly to the electrical connection terminals on the housing of the switch unit, even if the switch unit is already arranged in the mounting frame.

The mounting frame can additionally assume the function of a circuit carrier by this connection and / or wiring and / or suppression components for the electrical appliance includes. For this purpose, electrical connections in a "customer-specific" installation for the power supply of the electrical device, for supplying the voltage to the electric motor in the electrical appliance, for supply lines in the electrical appliance o. The like. Are located on the mounting frame Lines in electrical connection.

The mounting frame can be designed device-specific with respect to the respective electrical device, so that the installation of serving as a base module switch unit by means of the mounting frame in the electrical device allows and / or is facilitated. The switch unit, however, is designed essentially device-independent with respect to the respective electrical appliance as a kind of base module. Extended switch functions can be integrated via the mounting frame, for example by arranging electronics or the like for additional device-specific functions in the manner of "additional cover functions" in the mounting frame a microprocessor and / or a display. However, the mounting frame can also be the Aufiiahme other additional functions such as a locking for the actuator, a stroke limiter or travel limit for the actuator, a transport lock for the actuator, a Drackpunkterzeugungseinrichtung for the actuator, a switch-on for the actuator, a right-left Switch for the electric motor, a suppression capacitor for the electric motor o. The like., Allow. According to the invention, a switch is thus created whose functionality is divided into always provided basic functions and optional additional functions.

The switch unit can be fastened in the receptacle of the mounting frame. Conveniently, this can be used verclipsbare snap and / or snap-in connections. The actuator protrudes out of the mounting frame, so that a device with respect to the electrical appliance ausgestaltetes actuator on the actuator, for example by locking, clipping o. The like., Can be fastened. To realize the external Dräckerführung a guide for the movable means of the actuator actuator is located on the mounting frame.

In summary, it can be said in other words that the power tool switch according to the invention is designed in a modular design with a mounting frame. A basic module in the smallest possible design includes all switch functions, including electronics, if necessary, and is therefore self-sufficient. The mounting frame allows and facilitates installation in the power tool. Extended switch functions can be integrated in the mounting frame.

Furthermore, in the case of the switch according to the invention, the live parts of the switch which are at the same electrical potential, in particular parts of the contact system and / or parts which are in contact with the contact system, can essentially be designed as one individual part. In other words, there is a reduction in the number of parts of the power tool switch by concentrating the functions of the same potential on each one largely one-piece item. Advantageously, this can achieve a reduction in costs and a reduction of the installation space for the switch. The contact system expediently has a switch-on contact designed as an individual part, wherein the switch-on contact consists of a fixed contact, which is assigned to the movable switch-on contact carrier, and a mains connection. The power supply may be configured as required in the manner of a push-in exclusion, a tab terminal, a screw terminal, an insulation displacement terminal, or the like.

If the switch contains integrated electronics as control and / or regulating electronics for the operation of the electric motor of the electrical appliance, then a reduction in the installation space for the switch is also achieved. It then lends itself in addition to the fact that the contact system has a bridging contact designed as an individual part, wherein the bridging contact consists of a fixed contact, which is assigned to the movable bridging contact carrier, and a motor connection. The motor terminal can be configured as required in the manner of a push-in exclusion, a tab terminal, a screw terminal, an insulation displacement terminal o. Furthermore, it makes sense that the bridging contact has a contact spring for powering the electronics.

In a known manner, the electronics can be designed in the manner of a thick film module on a ceramic carrier with integrated terminals. Cost-effective, however, is also possible to arrange the electronics on a conventional circuit board.

For further partial reduction, the contact system may have a multifunction part designed as a single part, wherein the multifunction part comprises at least one bearing for the movable contact carriers. Conveniently, the multifunction part comprises the movable Einschaltkontaktträger, the movable bridging contact carrier, if any, as well as the suspension of the movable contact carrier. Furthermore, it makes sense that the multifunction part has a further contact spring for powering the electronics. If an interference suppression capacitor is provided for the electronics, then the multifunctional part can, depending on Requirement a formed in the manner of a push-in connection, a fork terminal, an insulation displacement connection o. The like. Connection for the capacitor included.

Finally, further live parts of the switch, which are located at the same potential, may be formed as an individual part. In particular, it makes sense to design the further mains connection and the further motor connection in the manner of a support point. The interpolation point can then contain a further connection for the capacitor, wherein these connections can be configured as required in the manner of a push-in connection, a tab connection, a screw connection, an insulation displacement connection or the like.

The advantages achieved by the invention are in particular that the switch has a flexible modular structure. The base module can be used independently and can be produced as a standard in high quantities, making this inexpensive. Only an individual mounting frame is then necessary for the corresponding installation in the power tool. The mounting frame as an additional part can then also provide cost optimized for the particular application. Especially as a power tool switch this switch is suitable for all power tool applications in the low-cost range.

The advantages achieved by the invention continue to be that the switch by Zusarnmenführung of potential equal parts to each one item in the manner of a multi-function part has a very small size. Due to the few items that are also produced as cost-effective stamped and bent parts from corresponding metal sheets, the cost of mounting the switch is lower. Consequently, it is a very inexpensive switch. In addition, reduce the contact resistance in the switch when reducing the number of parts, so this is functional and fail-safe. In particular, as a power tool switch this is suitable for all power tool applications in the low-cost area. Embodiments of the invention with various developments and refinements are illustrated in the drawings and will be described in more detail below. Show it

1 is a schematic diagram of the arrangement of an electrical switch in a power tool,

2 shows the housing with partially broken illustrated handle for the power tool,

3 shows the switch consisting of a switch unit and a mounting frame,

4 shows the switch unit in the manner of a switching module as an individual part,

5 shows the mounting frame for the switch unit as a single part,

6 shows a switch as in FIG. 3 according to a further exemplary embodiment,

7 shows the mounting frame of the switch of FIG. 6 as a single part,

8 shows the switch unit of FIG. 4 with the housing open, with some individual parts removed, FIG.

9 shows the switch unit as in FIG. 8, but with the control and / or regulating electronics removed;

Fig. 10, the circuit board with control and / or control electronics of FIG. 8 as a single part and

Fig. 11 shows another switch for switching the right-left run for the power tool in an exploded view. The electrical switch 1 according to the invention is used in an electrical appliance which is supplied by a voltage source. Preferably, the electric switch 1 in a power tool 2, such as a drill, a hammer drill, a grinder, a saw, a planer, an angle grinder o. The like., Used. In Fig. 1, the schematic diagram for the arrangement of the electrical switch 1 in the power tool 2, which is supplied by the AC line voltage U, shown in more detail.

The electric tool 2 has an electric motor 3 with field windings 4. The electric motor 3 is switched on and / or off by operation of the switch 1, which is located in the handle 5 (see FIG. 2) of the power tool 2. For actuation, the switch 1 has a designed as a pusher actuator 6, which acts by means of an actuating element 13 switching to a contact system 7. Optionally, the speed of the electric motor 3 can also be adjusted by means of the switch 1, to which the actuating element 13 acts on a setpoint generator 9, which comprises, for example, a potentiometer, as well as an additional contact system 8. The speed adjustment of the electric motor 3 by means of a control and / or regulating electronics 10 with a power semiconductor 11, such as a triac o. The like., Which is designed in the manner of a phase control.

By movement of the actuator 6, the contact system 7 is first closed and the AC line voltage U applied via the power semiconductor 11 to the electric motor 3. One of the position of the actuator 6 corresponding control voltage is removed from the potentiometer 9 and fed to the control electronics 10. The control electronics 10 ignites in functional dependence on this control voltage, the power semiconductor 11 at the corresponding phase or Stromflußwinkel the AC line voltage U, so that finally set the position of the actuator 6 corresponding speed of the electric motor 3 and optionally regulated.

The actuator 6 is in its maximum position, the contact system 8 is closed, whereby the control electronics 10 and the power semiconductor 11 are bridged. Thus, the full mains AC voltage U is applied to the electric motor 3 and this moves at the maximum speed. The detailed design of the built-in handle 5 switch 1 can be seen in Fig. 2. The switch 1 has a housing 12, from which the actuating element 13 protrudes. On the actuating element 13, in turn, the device-specific designed for the respective power tool 2 actuator 6 is attached. The housing 12 thus includes the contact system 7, 8 and the actuator 13 as an independently functional switch unit 14 in the manner of a switching module, which in itself in Fig. 4 to see is.

As can be further seen with reference to FIG. 2, the switch unit 14 is arranged in a mounting frame 15 serving for attachment in the electrical appliance 2. The mounting frame 15, which can be seen as an item closer in Fig. 5, has a receptacle 55 for the switch unit 14. The receptacle 55 has a size corresponding approximately to the switch unit 14, so that the switch unit 14 can be used in the receptacle 55 on the mounting frame 15. For this purpose, the switch unit 14 in the receptacle 55 of the mounting frame 15 can be fastened. For example, the attachment by means of snap and / or snap connections 54 by clipping done, as can be seen by comparison of Fig. 4 and Fig. 5, so that the mounted on the mounting frame 15 switch unit 14 is preassembled as a unit, which in turn. 3 can be seen. The actuating element 13 protrudes from the mounting frame 15, wherein the actuating member 6 on the actuating element 13 can be latched, clipped o. The like. Is attached. Conveniently, a guide 21 is located on the mounting frame 15 for the actuator 6 for the realization of the external handle guide.

While the switch unit 14 is a standard component manufactured in large quantities, the mounting frame 15 is adapted to the specific installation space in the handle 5 of the power tool 2, as can be seen with reference to FIG. 2, device-specifically. To clarify this in more detail, in Fig. 6, a switch 1 can be seen according to a further embodiment, which is intended for a power tool with a different installation situation. In this switch 1, the mounting frame 15 'shown as an individual part in FIG. 7 is obviously different from the mounting frame 15 according to FIG. 5 designed. By contrast, in the case of the switch unit 14, the switch 1 according to FIG. 6 is also that shown in FIG. 4.

On the switch unit 14, namely on its housing 12 are electrical connection terminals 16 for supplying the electrical voltage U to and / or from the contact system 7, 8, as shown in Fig. 4 can be seen. For the power supply of the power tool 2, that is for the supply of voltage to the electric motor 3 in the power tool 2 and thus to dissipate the electrical voltage U from the contact system 7, 8, serve further electrical connection terminals 17 on the housing 12, wherein the left in Fig. 4 Connection terminal 17 is hidden by a housing rib 56 for the separation of the connection terminals 17 itself. If it requires the special installation situation in the power tool 2, which is not shown further, the electrical connection terminals 16, 17 with arranged on the mounting frame 15 electrical mating connections, in particular in the form of connectors correspond, such that when the switch unit 14 on the mounting frame 15 an electrical connection between the electrical connection terminals 16, 17 and the electrical mating connections is made. Then the mating connections serve to extend the connections 16, 17 on the switch unit 14. Finally, electrical connections for supply lines in the power tool 2 can be located on the mounting frame 15 at another point, whereby a customized installation of the connections is made possible. If necessary, the electrical connections 16, 17 can be in electrical connection with the electrical mating connections by means of lines on the installation frame 15.

The switch unit 14 further comprises the configured in the manner of a standard module control and / or regulating electronics 10 for the electric motor 3 of the power tool 2, which is located on a visible in Fig. 8, conventional printed circuit board 18, disposed in the housing 12 of the switch unit 14. Of course, the control and / or regulating electronics 10 may also be designed in the manner of a thick film module with integrated terminals. As already mentioned, the mounting frame 15 is designed device-specific with respect to the respective power tool 2, so that in the mounting frame 15 additional electronics o. The like. For other device-specific functions in the manner of This additional electronics is fastened, for example, to a cover extension 52 of the mounting frame 15 which is visible in FIG.

Further, the inclusion of other additional functions may be possible on the mounting frame 15, which are not included in the designed as a standard component switch unit 14. Thus, in Fig. 5, a Aufhahmedom 20 can be seen, in which a lock for the actuator 13 is used. Further examples of such Zusatzfünktionen are a stroke limitation or travel limit for the actuator 13, a transport lock for the actuator 13, a pressure point generating device for the actuator 13, a switch-on for the actuator 13 o. The like., Which, however, are not shown. Finally, a right-left switch 35 (see FIG. 11) for the electric motor 3 or an interference suppression capacitor 30 (see FIG. 1) for the electric motor 3 can also be arranged on the mounting frame 15.

In the switch 1 according to the invention further reduction of the individual parts is achieved by the functions of the switch 1 are combined and concentrated. For this purpose, the parts of the switch 1 located at the same electrical potential, in particular those for the contact system 7, 8, are designed essentially as one individual part, as can be seen from FIG.

The serving for switching on the mains voltage contact system 7 comprises a movable Einschaltkontaktträger 22 and a cooperating with the Einschaltkontaktträger 22 fixed contact 23, which in turn is in electrical connection with the power supply 16. The fixed contact 22 and the power supply terminal 16 are formed as a single part, which is hereinafter referred to as Einschaltkontakt 24 and the specific embodiment in Fig. 9 is shown in more detail. Expediently, the network connection 16 is designed in the manner of a push-in exclusion, as can also be seen in FIG. 9. Of course, the power supply 16 can also be configured as a flat plug connection, as a screw connection o. The bridging of the control electronics 10 and the power semiconductor 11 serving contact system 8 comprises a movable bridging contact carrier 25 and a bridging contact carrier 25 cooperating fixed contact 26, which in turn is in electrical connection with the motor terminal 17. The fixed contact 26 and the motor terminal 17 are in turn formed as a single part, which is hereinafter referred to as a bridging contact 27 and can be seen in Fig. 8. Conveniently, the motor terminal 17 is also in the manner of a push-in exclusion, as shown in Fig. 8, a insulation displacement connection o. The like. Designed. Furthermore, the bridging contact 27 still has a visible in Fig. 9 contact spring 28 for powering the control and / or regulating electronics 10. The fixed contact 26 on the bridging contact 27 can not be seen in FIG. 9 insofar as it is covered by the cam control 57 for the contact carriers 22, 25 located on the actuating element 13.

The contact system 7, 8 can have a multifunction part 29 designed as an individual part for further partial reduction, which in turn can be seen in more detail in FIG. 8 or FIG. 9. The multifunction part 29 comprises at least one bearing for the movable contact carrier 22, 25, namely the multifunction part 29 includes the movable Einschaltkontaktträger 22 and, if present, the movable bridging contact carrier 25. Furthermore, in the multi-function part 29, the suspension of the movable contact carrier 22, 25 in the kind of a leaf spring integrated. In addition, the multifunction part 29 may also contain the further contact spring 28 'for supplying power to the control and / or regulating electronics 10. As far as a capacitor 30 is arranged on the switch 1, the multi-function part 29 may also contain a connection 31, for example a push-in connection, a fork connection, an insulation displacement connection or the like, for the capacitor 30.

Finally, other live parts of the switch 1, which are located at the same potential, each formed as an individual part. Thus, the further mains connection 16 and the further motor connection 17 is configured as a support point 32. The support point 32 contains a further connection 31 'for the capacitor 30. Again, these connections 16, 17, 31' can be designed in the manner of a push-in connection. As already mentioned, in the housing 12 there is a setpoint generator 9, which in the manner of a potentiometer according to FIG. 10 consists of an adjustable contact element 33 as a wiper and a fixed contact element 34 designed as a resistance path. The actuator 13 acts adjusting to the setpoint generator 9, so that, for example, the speed of the electric motor 3 is set by the control and / or regulating electronics 10 in dependence on the adjustment of the adjustable contact element 33. According to the invention, the adjustable contact element 33 consists of a wound spring.

The spring 33 has a cylindrical winding with a substantially circular cross-section. As a result, a rolling movement of the spring 33 during movement of the actuating element 13 is made possible. Due to the rolling movement results in a reduced abrasion on the adjustable contact element 33. The spring 33 may consist of a portion of a tensile and / or pressure spring strand, which has a small wire diameter. Conveniently, the spring 33 is made of a material with good electrical conductivity, wherein the material for the spring 33 with respect to the abrasion resistance o. The like. Different from the material for the contact system 7, 8 may be.

The resistor tracks 34 are printed by means of a corresponding resistor paste on the circuit board 18 and then baked. On the circuit board 18 are still the electrical and / or electronic components 51 for the control and / or regulating electronics 10 and the power semiconductor 11. Further, the conductor tracks 53 for connecting the components 51 and the power semiconductor 11 are located on the circuit board 18.

The electric motors 3 in drills, screwdrivers o. The like. Power Tools 2 are often operated both in the right and in the left-hand rotation. In the power tool 2 can serve as a switch for the right-left running of the electric tool 2 serving further electrical switch 35, which may be attached to the mounting frame 15, for example. The switch 35 shown in greater detail in FIG. 11 has a switch housing 36 from which an actuating means 37 for manual operation of the switch 35 protrudes. The switch 35 has a fixed contact 39 and a switch contact 40 existing contact system 38. The actuating means 37 acts to switch the contact system 38 between two switching positions on the switch contact 40 a. Furthermore, the actuating means 37 cooperates with a detent spring such that the respective switching position is formed as a detent position. According to the invention, the switching contact 40 and the detent spring of a single part in the manner of a contact spring.

The contact spring 40 may be made as a leaf spring of a spring wire, a spring band o. The like. It makes sense to form the contact spring 40 in the manner of a stamped and bent part. As can further be seen from FIG. 11, the contact spring 40 is configured approximately in a V-shaped manner. In this case, the contact spring 40 has a rounded base 41 and two spring legs 42, wherein the spring legs 42 for making contact with the respective fixed contacts 39 can be applied.

The switch housing 36 consists of a base 43 and a cover 44. The fixed contacts 39 are fixed in the base 43 in the fixed contacts 39 corresponding receptacles 45. On the fixed contacts 39, contact tongues 46 are guided as connections from the switch housing 36 to the outside. The contact tongues 46 are configured as shown in FIG. 11 in the manner of plug contacts. However, the contact tongues 46 may also, if desired, be designed as push-in connections or the like.

The actuating means 37 is designed as a pivotably mounted on a pivot bearing 47 in the base 43 operating lever. A first arm 48 of the actuating lever 37 protrudes out of the switch housing 36 as a handle for manual operation of the switch 35. A second arm 49 of the actuating lever 37 is located to hold the contact spring 40 in the switch housing 36. The contact spring 40 is pressed on the second arm 49 of the actuating lever 37. As can further be seen from FIG. 11, two contact springs 40 are arranged one above the other on the second arm 49. As an alternative to the pivotable actuating lever 37, the actuating means can also be displaced as one be designed in the base mounted actuating slide, which is not shown.

The base 41 of the contact spring 40 engages in a switching gate 50, in such a way that upon movement of the actuating means 37, the contact system 38 switches detent. The shift gate 50, which is located in the base 43, is configured approximately W-shaped and has at least two detent positions in the recesses of the "W." The detent positions are the two shift positions of the contact system 38. Each corresponds to a shift position 3. If desired, a third detent position, which is the middle zero position, may also be present The zero position, at which no contact is made, so that the electric motor 3 does not move , is then located between the two switching positions.

The invention is not limited to the described and illustrated embodiments. Rather, it also encompasses all expert developments within the scope of the invention defined by the claims. Thus, such a switch 1 can be used not only on a powered with the AC mains voltage power tool 2 but also on a powered with DC battery power tool. In this case, as a power semiconductor, a FET, MOS-FET o. The like. Used. Furthermore, such a switch 1 can be used not only for electric tools 2 but also in other electric appliances supplied by a power source such as gardening tools, kitchen appliances or the like.

Reference numeral list:

: (electric) switch: electric tool: electric motor: field coil: handle: actuator, 8: contact system: potentiometer track / setpoint generator 0: control and / or regulating electronics 1: power semiconductor 2: housing 3: B actuating element 4: switch unit 5, 15 ': Mounting frame 6: (electrical) connection connection / power connection 7: (electrical) connection connection / motor connection 8: Circuit board 0: mounting sleeve 1: guide (for mounting element) 2: contact contact carrier / contact carrier 3: fixed contact 4: closing contact 5: bridging contact carrier / contact carrier 6: fixed contact 7: Bridging contact 8,28 ': Contact spring 9: Multifunction part 0: (Suppressor) Capacitor 1,31': Connection (for condenser) 2: Support point : adjustable contact element / spring (from setpoint generator): fixed contact element / resistance path (from setpoint generator): (further electrical) switch / right-left switch: switch housing: actuating means / actuating lever: contact system: fixed contact: switching contact / contact spring: base (from contact spring) : Spring leg (from contact spring): base: cover: receptacle (in base): contact tongue: pivot bearing: first arm (of actuating lever): second arm (of B actuating lever): control gate: (electrical / electronic) component: cover extension: trace: S Snap-in and / or snap-in connection: Mounting: Housing rib: cam control

Claims

Patent claim:

1. Electrical switch for an electrical appliance, in particular for power tools (2), such as drills, grinders, saws, planer, angle grinder o. The like., With an actuating element (13), and with a contact system (7, 8), wherein the actuating element (13) switching on the contact system (7, 8) acts, characterized in that the contact system (7, 8) and the actuating element (13) is designed as a self-contained switch unit (14) in the manner of a module, and that the switch unit (14) in one of the attachment in the electrical appliance serving mounting frame (15, 15 ') can be arranged.

2. Electrical switch according to claim 1, characterized in that the mounting frame (15, 15 ') has a receptacle (55) for the switch unit (14), wherein in particular the receptacle (55) has a size corresponding approximately to the switch unit (14) has.

3. Electrical switch according to claim 1 or 2, characterized in that on the switch unit (14) electrical connection terminals (16, 17) for supplying and / or discharge of the electrical voltage to and / or from the contact system (7, 8) are located in that preferably the electrical connection terminals (16, 17) correspond to electrical mating connections arranged on the mounting frame (15, 15 '), in particular in the manner of plug connectors, such that when the switch unit (14) is arranged on the mounting frame (15, 15') an electrical connection between the electrical connection terminals (16, 17) and the electrical mating connections can be produced, and that further preferably on the mounting frame (15, 15 ') electrical connections for the power supply of the electrical appliance, for supplying the voltage to the electric motor (3) in Electrical appliance, for supply lines in the electrical appliance o. The like. Are located, in particular, the electrical connections with the ele ktrischen counter terminals may be in electrical connection by means of lines.

4. Electrical switch according to spoke 1, 2 or 3, characterized in that the switch unit (14) has a housing (12), and that preferably in the switch unit (14), in particular in the housing (12), a control and / or regulating electronics (10) for the electric motor (3) o. The like. Of the electrical appliance is arranged.

5. Electrical switch according to one of claims 1 to 4, characterized in that the mounting frame (15, 15 ') is designed device-specific with respect to the respective electrical appliance that preferably in the mounting frame (15, 15') an electronics o. is arranged for further device-specific functions that further preferably on the mounting frame (15, 15 '), the inclusion of additional functions, such as a detent for the actuating element (13), a stroke limiter or travel limit for the actuating element (13), a transport lock for the actuator (13), a pressure point generating device for the actuating element (13), a switch-lock for the actuating element (13), a right-left switch (35) for the electric motor (3), a suppression capacitor (30) for the electric motor (3) o The like, is possible, and that still further preferably, the switch unit (14) substantially device-independent with respect to the respective Elektroger ät is configured.

6. Electrical switch according to one of claims 1 to 5, characterized in that the switch unit (14) in the receptacle (55) of the mounting frame (15, 15 '), preferably by means of snap and / or snap-in connections (54) can be fastened.

7. Electrical switch according to one of claims 1 to 6, characterized in that the actuating element (13) protrudes from the mounting frame (15, 15 '), that preferably with respect to the electrical appliance device ausgestaltetes actuator (6) on the actuating element (13 ), in particular latchable, clipped o. The like., Can be fastened, and that further preferably on the mounting frame (15, 15 ') is a guide (21) for the movable actuator (6) is befindlich.

8. Electrical switch for an electrical appliance, in particular for power tools (2), such as drills, grinders, saws, planer, angle grinder o. The like., With an actuating element (13), and with a contact system (7, 8), wherein the actuating element (13) switching on the contact system (7, 8) acts, in particular according to one of claims 1 to 7, characterized in that the on the same electrical Potential located parts of the switch (1), in particular parts of the contact system (7, 8) and / or with the contact system (7, 8) related parts, are formed substantially as a single item.

9. Electrical switch according to one of claims 1 to 8, characterized in that the contact system (7) designed as a single part Einschaltkontakt (24), and that preferably the Einschaltkontakt (24) of a fixed contact (23), the movable Einschaltkontaktträger (22) is assigned, as well as a network connection (16).

10. Electrical switch according to one of claims 1 to 9, characterized in that the contact system (8) has a trained as a single bridging contact (27) that preferably the bridging contact (27) from a fixed contact (26), the movable bridging contact carrier ( 25), and a motor connection (17), and in that, preferably, the bridging contact (27) has a contact spring (28) for supplying power to an electronic system (10).

11. Electrical switch according to one of claims 1 to 10, characterized in that the electronics (10) is designed in the manner of a thick-film module with integrated terminals.

12. Electrical switch according to one of claims 1 to 10, characterized in that the electronics (10) on a printed circuit board (18) is arranged.

13. Electrical switch according to one of claims 1 to 12, characterized in that the contact system (7, 8) designed as a single part multifunction part (29), that preferably the multifunction part (29) at least one bearing for a movable contact carrier (22, 25), further preferably that the multifunction part (29) comprises the movable Einschaltkontaktträger (22), optionally the movable bridging contact carrier (25) and in particular the suspension of the movable contact carrier (22, 25), that even more preferably the multifunction part (29) a further contact spring (28 ') for supplying power to the electronics (10), and in that the multifunction part (29) further preferably contains a connection (31) for a capacitor (30) designed in the manner of a push-in connection, a fork connection, an insulation displacement connection or the like.

14. Electrical switch according to one of claims 1 to 13, characterized in that further live parts of the switch (1), which are located at the same potential, are each formed as a single part, wherein preferably the further power supply (16) and the other Motor terminal (17) as a base (32) is configured, and further preferably, the support point (32) includes a further terminal (31 ') for the capacitor (30).

15. Electrical switch according to one of claims 1 to 14, characterized in that the terminal, in particular the mains connection (16), the motor terminal (17), the other terminals (31, 31 ') o. The like., In the manner of Push-in exclusion, a blade terminal, a screw terminal, a insulation displacement connection o. The like., Is configured.