EP1971991B1 - Electrical switch - Google Patents

Description

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 electric tools can be drills, angle grinders, saws, planers, grinders, orbital sanders, screwdrivers or the like.

From the DE 197 08 939 A1 is such an electrical switch for switching on and off of a power tool 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.

A similar electrical switch, which is made up of standard components, is also from the DE 100 19 471 A1 known. This switch is the contact system and the actuator is designed as a self-contained switch unit in the manner of a module.

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 power 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.

When switch according to the invention, the switching module-like switch unit is arranged in one of the mounting in the electrical appliance serving mounting frame. The mounting frame is 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 facilitated. The switch unit, however, is designed essentially device-independent with respect to the respective electrical appliance as a kind of base module. 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 design the mounting frame customer-specific 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 basic switch for a wide variety of power tools, thus making it possible to use the power 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, in particular on the housing, the arrangement of electrical connection terminals for supplying and / or discharging the electrical voltage to and / or from the contact system offers. Furthermore, in the switch unit, in particular in the housing, a control and / or regulating electronics for the electric motor o. The like, the electrical device 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 "customized" 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. The electrical connections are then in electrical connection with the electrical counter connections, if appropriate by means of further lines.

Extended switch functions can be integrated via the mounting frame by: For example, in the mounting frame electronics o. The like. For other device-specific functions in the manner of "additional cover functions" is arranged. Thus, extended "cover functions", which require a more complex electronics, for example using a microprocessor and / or a display allows.

However, the mounting frame can also accommodate other additional functions, such as a detent for the actuator, a stroke limiter or travel limit for the actuator, a transport lock for the actuator, a pressure point generating device 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 is fastened in the receptacle of the mounting frame. It is expedient for this purpose to be able to use clip-on snap-action and / or latching 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 handle guide 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 can be configured as required in the manner of a push-in exclusion, a tab terminal, a screw terminal, a insulation displacement connection o.

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, a 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 base can then contain a further connection for the capacitor, these connections can be configured as required in the manner of a push-in connection, a tab terminal, a screw terminal, an insulation displacement connection o.

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 has a very small design by merging potential equal parts to each one item in the manner of a multi-function part. 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.

Fig. 1

ein Prinzipschaltbild für die Anordnung eines elektrischen Schalters in einem Elektrowerkzeug,

Fig. 2

das Gehäuse mit teilweise aufgebrochen dargestelltem Handgriff für das Elektrowerkzeug,

Fig. 3

den Schalter bestehend aus einer Schaltereinheit und einem Einbaurahmen,

Fig. 4

die Schaltereinheit in der Art eines Schaltmoduls als Einzelteil,

Fig. 5

den Einbaurahmen für die Schaltereinheit als Einzelteil,

Fig. 6

einen Schalter wie in Fig. 3 entsprechend einem weiteren Ausführungsbeispiel,

Fig. 7

den Einbaurahmen des Schalters aus Fig. 6 als Einzelteil,

Fig. 8

die Schaltereinheit aus Fig. 4 mit geöffnetem Gehäuse, wobei einige Einzelteile entfernt sind,

Fig. 9

die Schaltereinheit wie in Fig. 8, wobei jedoch die Steuer- und/oder Regelelektronik entfernt ist,

Fig. 10

die Leiterplatte mit Steuer- und/oder Regelelektronik aus Fig. 8 als Einzelteil und

Fig. 11

einen weiteren Schalter zur Umschaltung des Rechts-Links-Laufs für das Elektrowerkzeug in Explosionsdarstellung.

Embodiments of the invention with various developments and refinements are illustrated in the drawings and will be described in more detail below. Show it

Fig. 1

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

Fig. 2

the housing with partially broken handle shown for the power tool,

Fig. 3

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

Fig. 4

the switch unit in the form of a switching module as an individual part,

Fig. 5

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

Fig. 6

a switch as in Fig. 3 according to a further embodiment,

Fig. 7

the mounting frame of the switch off Fig. 6 as a single part,

Fig. 8

the switch unit off Fig. 4 with the housing open, with some parts removed,

Fig. 9

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 off Fig. 8 as a single item and

Fig. 11

another switch for switching the right-left barrel 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 is the schematic diagram for the arrangement of the electrical switch 1 in the power tool 2, which is powered 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 actuated by the switch 1, located in the handle 5 (see Fig. 2 ) of the power tool 2 is switched on and / or off by the user. 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 is in Fig. 2 to see. 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 comprises the contact system 7, 8 and the actuating element 13 as an independently operative switch unit 14 in the manner of a switching module, which in itself in. In the housing 12, the contact system 7, 8 and optionally the potentiometer Fig. 4 you can see.

How to use the Fig. 2 Furthermore, the switch unit 14 is arranged in one of the mounting in the electrical appliance 2 serving mounting frame 15. The mounting frame 15, which as an item closer in Fig. 5 can be seen, 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 can be done by snap-fitting and / or snap-in connections 54 by clipping, as can be done by comparing Fig. 4 and Fig. 5 sees, so that the mounted on the mounting frame 15 switch unit 14 is preassembled as a unit, which in turn Fig. 3 you can see. 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 numbers, the mounting frame 15 is attached to the respective installation space in the handle 5 of the power tool 2, as is apparent from FIGS Fig. 2 can be seen, device-specific adapted. To clarify this, is in Fig. 6 to see a switch 1 according to another embodiment, which is intended for a power tool with a different installation situation. In this switch 1 is the in Fig. 7 shown as a single part mounting frame 15 'visible different from the mounting frame 15 after Fig. 5 designed. In the case of the switch unit 14, on the other hand, the switch 1 also follows Fig. 6 around the one in Fig. 4 is shown.

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 in Fig. 4 you can see. 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 in Fig. 4 left 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 on an in Fig. 8 visible, conventional printed circuit board 18 located in the housing 12 of the switch unit 14 is disposed. 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 so-called "additional cover functions" may be arranged. This additional electronics is for example at an in Fig. 5 visible lid extension 52 of the mounting frame 15 is attached.

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. So is in Fig. 5 to see a receiving 20, in which a lock for the actuator 13 is inserted. Further examples of such additional functions are a stroke limitation or travel limit for the actuating element 13, a transport lock for the actuating element 13, a pressure point generating device for the actuating element 13, a switch-on for the actuator 13 o. The like., Which, however, are not shown. Finally, can be on the mounting frame 15 and a right-left switch 35 (see Fig. 11 ) for the electric motor 3 or a suppression capacitor 30 (see Fig. 1 ) arrange for the electric motor 3.

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 in each case, as can be seen on the basis of FIG Fig. 1 recognizes.

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 its concrete configuration in Fig. 9 can be seen closer. Expediently, the network connection 16 is designed in the manner of a push-in exclusion, as likewise in FIG Fig. 9 you can see. 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 in Fig. 8 you can see. Conveniently, the motor terminal 17 is also in the manner of a push-in exclusion, as in Fig. 8 shown, a insulation displacement connection o. The like. Designed. Furthermore, the bridging contact 27 still has a in Fig. 9 visible contact spring 28 for powering the control and / or regulating electronics 10. The fixed contact 26 at the bridging contact 27 is in Fig. 9 not to be seen insofar as it is hidden by the cam control 57 located on the actuating element 13 for the contact carriers 22, 25.

The contact system 7, 8 can have a multi-function part 29 designed as a single part for further partial reduction, which in turn is incorporated in FIG Fig. 8 or Fig. 9 can be seen closer. 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 multifunction part 29 may also contain a terminal 31, for example a push-in connection, a fork terminal, an insulation displacement connection o. 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 includes a further terminal 31 'for the capacitor 30. Again, these terminals 16, 17, 31' may be configured in the manner of a push-in connection.

As already mentioned, is located in the housing 12, a setpoint generator 9, which in the manner of a potentiometer according to Fig. 10 consists of an adjustable contact element 33 as a grinder and designed as a resistance path, fixed contact element 34. 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 power tool 2 serving further electrical switch 35 can be arranged, which may be attached to the mounting frame 15, for example.

The in Fig. 11 shown switch 35 has a switch housing 36, from which an actuating means 37 for manual operation of the switch 35 protrudes. Der.Schalter 35 has a fixed contacts 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 punched and bent part. How to continue the Fig. 11 removes, the contact spring 40 is configured approximately V-shaped. 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 according to Fig. 11 designed 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. How to continue the Fig. 11 takes 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". In the locking positions are the two switching positions of the contact system 38. Each one switching position corresponds to the clockwise or counterclockwise rotation of the electric motor 3. If desired, can still be a third detent position, which is the middle zero position, be present , The zero position, in 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:

• 1: (electrical) switch
• 2: power tool
• 3: electric motor
• 4: field coil
• 5: handle
• 6: Actuator
• 7, 8: contact system
• 9: Potentiometer track / setpoint generator
• 10: Control and / or regulating electronics
• 11: power semiconductors
• 12: housing
• 13: Actuator
• 14: switch unit
• 15,15 ': mounting frame
• 16: (electrical) connection terminal / mains connection
• 17: (electrical) connection terminal / motor terminal
• 18: circuit board
• 20: admission tom
• 21: guide (for actuator)
• 22: Power contact carrier / contact carrier
• 23: fixed contact
• 24: switch-on contact
• 25: bridging contact carrier / contact carrier
• 26: fixed contact
• 27: Bridging contact
• 28,28 ': contact spring
• 29: Multifunction part
• 30: (suppression) capacitor
• 31,31 ': connection (for capacitor)
• 32: base
• 33: adjustable contact element / spring (from setpoint generator)
• 34: fixed contact element / resistance path (from setpoint generator)
• 35: (further electrical) switch / right-left switch
• 36: switch housing
• 37: actuating means / operating lever
• 38: contact system
• 39: fixed contact
• 40: switching contact / contact spring
• 41: base (from contact spring)
• 42: spring leg (of contact spring)
• 43: socket
• 44: cover
• 45: Recording (in the pedestal)
• 46: contact tongue
• 47: pivot bearing
• 48: first arm (of operating lever)
• 49: second arm (from operating lever)
• 50: Shift gate
• 51: (electrical / electronic) component
• 52: Lid extension
• 53: trace
• 54: Snap and / or snap connection
• 55: recording
• 56: Casing rib
• 57: cam control

Claims (15)

1. An electrical switch for an electrical device, in particular for power tools (2), such as drilling machines, grinders, saws, planers, angle grinders, or the like, having an actuating element (13), and having a contact system (7, 8), wherein the actuating element (13) acts on the contact system (7, 8) in a switching manner , and wherein the contact system (7, 8) as well as the actuating element (13) is designed as an independently operable switching unit (14) in the form of a module, characterized in that the switching unit (14) is essentially arranged device-independent with regard to the electrical device, that the electrical switch (1) has an installation frame (15, 15') which is used for mounting in the electrical device, in which the switching unit (14) is arranged, and that the installation frame (15, 15') is arranged device-specific with regard to the respective electrical device.
2. An electrical switch according to claim 1, characterized in that the installation frame (15, 15') has a mounting (55) for the switching unit (14), wherein the mounting (55) in particular has a size corresponding approximately to the switching unit (14).
3. An electrical switch according to claim 1 or 2, characterized in that electrical connection ports (16, 17) for the supply and/or discharge of electrical voltage to and/or from the contact system (7, 8) is located on the switching unit (14), that preferably the electrical connection ports (16, 17) correspond to electrical mating ports arranged on the installation frame (15, 15'), particularly in the form of plug connectors, such that in the arrangement of the switching unit (14) on the installation frame (15, 15') an electrical connection can be produced between the electrical connection ports (16, 17) and the electrical mating ports, and that in addition electrical ports for the power supply of the electrical device, for the supply of voltage to the electrical motor (3) in the electrical device, for the supply lines in the electrical device or the like are preferably located on the installation frame (15, 15'), wherein the electrical ports in particular are electrically connected with the mating ports, if necessary, by means of lines.
4. An electrical switch according to claim 1, 2 or 3, characterized in that the switching unit (14) has a housing (12), and that control and/or regulation electronics (10) for the electrical motor (3) or the like of the electrical device are preferably arranged in the switching unit (14), in particular in its housing (12).
5. An electrical switch according to one of claims 1 to 4, characterized in that electronics or the like for further device-specific functions is arranged in the installation frame (15, 15'), and that preferably the mounting of additional functions on the installation frame (15, 15') is permitted, such as a locking mechanism for the actuating element (13), a stroke limiter or path limiter for the actuating element (13), a transportation lock for the actuating element (13), a pressure point generation device for the actuating element (13), a switch-on locking device for the actuating element (13), a right-left changeover switch (35) for the electrical motor (3), an anti-interference capacitor for the electrical motor (3) or the like.
6. An electrical switch according to one of claims 1 to 5, characterized in that the switching unit (14) is mounted in the mounting (55) of the installation frame (15, 15') preferably by means of snap- and/or click-on connections (54).
7. An electrical switch according to one of claims 1 to 6, characterized in that the actuating element (13) protrudes from the installation frame (15, 15'), that preferably an actuating body (6) arranged device-specifically with regard to the electrical device can be attached, particularly snapped or clipped or the like onto the actuating element (13), and that in addition a guide (21) for the movable actuating body (6) is located on the installation frame (15, 15').
8. An electrical switch according to one of claims 1 to 7, characterized in that the parts of the switch (1) which are at the same electrical potential, particularly parts of the contact system (7, 8) and/or the parts connected to the contact system (7, 8), are each essentially designed as an individual part.
9. An electrical switch according to one of claims 1 to 8, characterized in that the contact system (7) has a switch-on contact (24) designed as an individual part, and that preferably the switch-on contact (24) consists of a fixed contact (23), which is assigned to the movable switch-on contact carrier (22), as well as a power supply connection (16).
10. An electrical switch according to one of claims 1 to 9, characterized in that the contract system (8) has a bridging contact (27) designed as an individual part, that preferably the bridging contact (27) consists of a fixed contact (26), which is assigned to the movable bridging contact carrier (25), as well as a motor connection (17), and that in addition the bridging contact (27) preferably has a contact spring (28) for supplying power to the electronics (10).
11. An electrical switch according to one of claims 1 to 10, characterized in that the electronics (10) are designed in the form of a thick-layer module with integrated connections.
12. An electrical switch according to one of claims 1 to 10, characterized in that the electronics (10) are arranged on a circuit board (18)
13. An electrical switch according to one of claims 1 to 12, characterized in that the contract system (7, 8) has a multifunctional part (29) designed as an individual part, that preferably the multifunctional part (29) comprises at least one bearing for a movable contract carrier (22, 25), that in addition the multifunctional part (29) preferably comprises the movable switch-on contact carrier (22), if necessary, the movable bridging contract carrier (25) as well as in particular the spring of the movable contact carrier (22, 25), that even further the multifunctional part (29) preferably has another contact spring (28') for supplying power to the electronics (10), and still further the multifunctional part (29) preferably contains a connection (31) for a capacitor (30) designed in the form of a push-in connection, a fork connection, an insulation displacement connection or the like.
14. An electrical switch according to one of claims 1 to 13, characterized in that additional live parts of the switch (1), which are at the same potential are each designed as an individual part, wherein preferably the additional power supply connection (16) as well as the additional motor connection (17) is arranged as a support point (32), and wherein in addition the support point (32) preferably contains another connection (31') for the capacitor (30).
15. An electrical switch according to one of claims 1 to 14, characterized in that the connections, particularly the power supply connection (16), the motor connection (17), the other connections (31, 31') or the like, are arranged in the form of a push-in connection, a flat-blade connection, a screw connection, an insulation displacement connection, or the like.

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