EP1982341B1 - Electric 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 electrical appliances, especially in electric hand tools as a power switch. In such a power tool may be a drill, a grinder, a saw, a planer, an angle grinder o. The like. Act.

From the DE 40 11 875 A1 an electrical switch with a housing is known in which there is a fixed contact and a switching contact exhibiting contact system. The switch further has an actuator for switching action on the contact system, wherein in a first position, the switching contact is removed from the fixed contact and in a second position, the switching contact rests on the fixed contact. The contact system is complex in the known switch.

Furthermore, the switch has electrical connections which are in electrical connection with the contact system. At the electrical connections, the electrical leads for the supply of electrical voltage to the contact system can be attached.

In the known switch, the electrical connections are arranged largely freely accessible on the housing. As a result, the connections are exposed to contamination, with water, dust or other pollutants can penetrate through the connections in the interior of the housing, which in turn lead to premature failure of the contact system can. Finally, with angle grinders, for example single-handed angle grinders, which are used for processing metals, arcing from pole to pole can occur due to the accumulation of metallic grinding dust on the outer live parts of the connections. This often requires a premature failure of the machine. In addition, there is a risk that voltage flashovers on the switch on externally accessible areas of the angle grinder occur, which in the worst case can lead to a life-threatening condition for the user.

Next is from the GB 2 196 792 A an electrical switch with a housing known in which there is a switching unit with electrical connections. The respective electrical connection located in the housing is associated with a breakthrough into the interior of the housing for the electrical supply line. At the opening of the housing is a tube-like approach, through which the electrical supply line is guided into the interior of the housing to the terminal. The tubular projection surrounds the electrical lead in the manner of encapsulation, so that a seal is provided to the interior of the housing. The seal consists of a flexible elastic material, clothes the breakthrough sealing and is with a certain contact pressure at the respective supply line for connection. Finally, the electrical connections in a separate connection area, which is designed in the manner of a chamber, arranged in the housing.

An electrical switch with a housing, which also has tubular projections for the passage of electrical leads, is also in the DE 10 75 189 B to see. The respective tubular projection is fused for the purpose of sealing in the interior of the housing with the wire sheath of the electrical supply line at a weld.

Furthermore, in the DE 88 06 920 U1 a hinged protective cover for a switching device shown. The flexible protective sheath is cupped and provided with a film hinge for opening.

Finally, in the US Pat. No. 3,890,477 . DE 31 50 210 A1 and US 5 260 531 A to see electrical switches in which the contact system is switchable with a snap action.

The invention is based on the GB 2 196 792 A the task of further developing the electrical switch such that it is largely protected from the action of pollutants. In particular, in the state in which the electrical leads are connected to the switch, no voltage-carrying parts of the switch for metal dust accumulation should be accessible. In particular, the switch should be used in one-handed angle grinders.

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

According to the embodiment of the switch according to the invention, the connection area is provided with a first cover located on the underside of the housing, so that the connection area is protected against the action of pollutants, which in turn further improves the sealing effect. The first lid is designed to be hinged, which facilitates the attachment and / or removal of the leads to the terminals. Of course, such a hinged lid also provides other access to the interior of the switch if necessary. For ease of installation, the first cover can be attached to the housing by means of a film hinge or the like. Furthermore, a pivoting hinge for locking the cover may be present on the housing, whereby a gaping apart of the closed housing by the first cover is effectively counteracted. As a result, a switch is provided in a protected design, so that premature failure of the switch is largely avoided. Advantageously, thus the life of the switch is increased. Advantageously, thereby different conductor cross-sections for the electrical supply line, for example, for a powered with 120 V or 230 V power tool from the same seal can be accommodated, whereby the Switch is cheaper. Further embodiments of the invention are the subject of the dependent claims.

Conveniently, the seal has a substantially round cross-section, in particular in the form of a spout, whereby the seal is designed to correspond substantially to the electrical supply line. It makes sense to make the seal of a thermoplastic elastomer, a foam in the manner of a foam seal o. The like.

The seal dresses the breakthrough sealing. It lends itself in a simple, easy to assemble way that the seal inserted in the opening, placed on a corresponding approach to the surface of the housing in the region of the opening, injected in the breakthrough o. The like. Is.

The closing of the lid is facilitated by the first cover by means of locking and / or snap hooks, locking hooks and locking cams o. The like., Which are located for example on the side of the housing, can be fastened to the housing. A good seal on the first cover is achieved by the first cover by means of a tongue and groove geometry, by means of an elastomeric insert o. The like. Closing the housing sealingly.

The switch may include an electronic / electrical circuit arrangement which serves, for example, for controlling and / or regulating an electric motor of the electrical appliance or of the power tool and is usually arranged on a printed circuit board. It offers itself in a space-saving manner to accommodate this electronics in a separate connection area. Preferably, the electronics is inserted into the first lid, and indeed, the printed circuit board can be fastened in the simple manner in the first lid.

The housing of the switch can be configured approximately cuboid. In order to mount the contact system and other parts of the switch easily, the housing is open on the side facing the actuator. For closing the open side of the housing there is an at least partially made of elastic material existing one-piece, second lid. The second cover is configured in the region of the actuating member as a thin-walled, elastic and approximately bell-shaped bellows, wherein the bellows encloses the actuating member on a groove located in the actuating member positively and / or non-positively by means of an opening. As a result, the actuator can be moved by the user and yet a secure seal is ensured in this area in the interior of the housing. The open side of the associated edge on the housing has a circumferential groove into which a peripheral web of the second cover engages positively and / or non-positively to the good seal.

In addition, a capacitor, which serves for example for the suppression of the electric motor of the power tool, may be arranged in the housing. Thus, all electrical connection elements and the suppression capacitor from dust o. The like. Housed protected in the switch housing. Furthermore, there are no live parts outside the switch, which corresponding hazards are effectively prevented. For ease of installation, the capacitor can be located in a receiving compartment in the housing, wherein the receiving compartment is closed by means of the second lid.

In order to facilitate the attachment of the electrical leads to the switch, the electrical connection can be configured in the manner of a push-in connection for easy insertion of the electrical supply line. In a preferred embodiment, the electrical push-in connection has a fixed contact spring and / or a fixed contact web and an elastically movable contact spring, such that the electrical supply line is plug-in by means of a contact pressure between the two contact springs or the contact spring and the contact web.

In order to replace the switch in a simple manner when needed, the electrical leads from the push-in connections are again solvable. For this purpose, a release of the electrical supply line in the electrical connection is made possible by means of a control cam, which acts on the movable contact spring of the electrical connection. In a preferred embodiment, the control cam consists of a rotatable wheel with an eccentric, wherein the eccentric moves the movable contact spring against the spring force upon rotation of the wheel. The wheel may be rotatably mounted in the first lid and / or be movably injected into the first lid during its manufacture, such that the wheel is accessible for releasing the electrical supply line in closed by means of the first lid housing.

Furthermore, in the switch according to the invention, the switching contact can be movably mounted with respect to the actuating member, wherein the switching contact is in operative connection with the actuating member by means of an elastic element. As a result, the switching contact during movement of the actuating member, in particular with a kind of snap action, switchable between the two positions. The contact system thus comprises an acceleration range for the switching contact, so that the actuation type and direction for the switch particularly meets the needs of one-handed angle grinders.

In the usual way, the contact system is located in a housing of the switch. For particular suitability for single-handed angle grinder, the switching contact in the manner of a contact bridge to bridge two fixed contacts can be configured. Conveniently, a contact lug leads from the fixed contact to an electrical connection in and / or on the housing for an electrical supply line, in particular the supply of electrical voltage to the contact system is used. In order to ensure a simple attachment of the supply line to the switch, the electrical connection can be designed in the manner of a push-in connection.

The actuator has a pusher protruding from the housing for manual movement by the user. In a particular embodiment of the acceleration range for the switching contact, the actuator comprises a carriage in the manner of a frame, wherein the pusher is mounted on the carriage. Conveniently, the frame for the carriage in approximately U-shaped with a base and two side legs designed. On the carriage, a slider is movably mounted, wherein the slider may be guided at the base of the U from the carriage. The switching contact is in turn on the slide, and in particular by means of one of the elastic system in the second position to the fixed contact serving system spring arranged.

In a cost-effective design, the elastic element is like a leaf spring, and expediently as a plastic leaf spring formed. One end of the elastic element is attached to the carriage. Conveniently, both ends of the elastic element are molded onto a side leg. At the same time a conventional mechanical component is saved by a molded plastic spring is used instead of an additional mechanical acceleration spring. The elastic element may be held in a simple manner on the slider in a grommet-like receptacle, and that the plastic leaf spring is held approximately in the middle between the two molded ends in the receptacle.

In a further embodiment, the slider is coupled to the carriage. For this purpose, there is a slot on the side leg of the U from the carriage, wherein a pin engages the slider in the slot for coupling. Conveniently, on both sides engage two opposing pins on the slide in each case a slot on the two opposite side legs of the U's to ensure trouble-free movement of the slider. To aid in the generation of the snap effect, the end of the pin may be provided with a ball catch cooperating with the housing as the carriage moves.

Finally, it is still possible to attach a spark shield on the slide, which can be moved between the two fixed contacts when switching between the two positions. This breaks any arc that may occur during switching, thus protecting the contact system from premature failure.

The advantages achieved by the invention are in particular that dangerous voltage flashovers are effectively prevented in this switch and safe operation of the power tool is guaranteed. The switch is particularly easy to connect in the power tool from one side and quickly due to the push-in connections. In the lower cap of the switch can optionally with little effort an electronic board, which includes, for example, a restart protection for the power tool, integrated and contacted.

The advantages achieved by the invention continue to be that a relatively small-sized switch is created, which is nevertheless suitable for the switching of high currents in the DC and / or AC voltage range. Further, the number of components for the contact system compared to previous switches is reduced, whereby the switch is inexpensive despite the advantages of the snap system.

Fig. 1

einen elektrischen Schalter in perspektivischer Ansicht,

Fig. 2

den elektrischen Schalter mit an dessen Unterseite geöffnetem Deckel,

Fig. 3

den elektrischen Schalter wie in Fig. 2, wobei jedoch im Deckel keine Elektronik eingesetzt ist,

Fig. 4

den elektrischen Schalter mit an dessen Unterseite geöffnetem Deckel, jedoch von der Oberseite aus gesehen,

Fig. 5

den elektrischen Schalter wie in Fig. 4, wobei der Deckel an der Oberseite abgenommen ist,

Fig. 6

den Schalter wie in Fig. 5, wobei jedoch das Kontaktsystem entfernt ist, und

Fig. 7

das Kontaktsystem als Einzelteil.

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

an electric switch in perspective view,

Fig. 2

the electric switch with lid opened on its underside,

Fig. 3

the electric switch as in Fig. 2 , but in the lid no electronics is used,

Fig. 4

the electric switch with lid open at the bottom, however seen from the top,

Fig. 5

the electric switch as in Fig. 4 with the lid removed at the top,

Fig. 6

the switch as in Fig. 5 but with the contact system removed, and

Fig. 7

the contact system as a single part.

In Fig. 1 An electrical switch 1 is to be seen, which is to be used for an electrical appliance, namely for a power tool with an electric motor. The power tool may be a drill, a grinder, a saw, a planer, an angle grinder, or the like. The switch 1 has a housing 2 consisting of a thermoplastic material with a first cover 12 arranged on the underside and with a second cover 20 arranged on the upper side. In the housing 2 there is a contact system 3, as described with reference to FIGS Fig. 5 can be seen. The closer in Fig. 7 shown contact system 3 has a fixed contact 4 and a switching contact 5. An actuator 6 with a protruding from the housing 2, to be moved by the user pusher 36 is used for switching action on the contact system 3, so that in a first position of the switch contact 5 is removed from the fixed contact 4 and in a second position of the switch contact 5 on the fixed contact 4 is present. In the present case, the contact system 3 has two fixed contacts 4, 4 ', whereby the switching contact 5 is designed in the manner of a contact bridge for bridging the two fixed contacts 4,4' in the second position.

For supplying the electrical voltage to the contact system 3, the switch 1 has in the housing 2 leading and / or located in the housing 2 electrical connections 7, as can be further in Fig. 3 sees. With the terminals 7, the electrical leads 8 can be connected to the switch 1. In order to prevent the penetration of pollutants into the housing 2, the electrical connections 7 have seals 9.

The seal 9 is designed in the manner of a spout and has a substantially round cross-section. In order to ensure a particularly good sealing effect, the seal 9 is made of a flexible elastic material. This material may be a thermoplastic elastomer, a foam for a type of foam seal or the like. As a result, the seal 9 is applied to the respective supply line 8 for the terminal 7 with a certain contact pressure. For electrical connection 7 performs an opening 10 into the interior of the housing 2. The seal 9 dresses the opening 10 sealingly. Appropriately, the seal 9 is inserted in the opening 10. Just as well, the seal 9 can be placed on a corrsponding approach not shown on the surface of the housing 2 in the region of the opening 10, injected in the opening 10 made of elastic plastic o. The like. Be. It is particularly appropriate to design all seals 9 as a common, one-piece sealing part, said sealing part according to Fig. 2 is inserted into the opening 10 on the housing 2 for the connection area 11 described below. The individual, the leads 8 associated seals 9 are surrounded by half shells 48 on the first cover 12 and the housing 2 in the closed housing 2.

The electrical connections 7 are arranged in a separate connection region 11 in the housing 2. The connection portion 11 is designed in the manner of a chamber, as the Fig. 3 can be seen. In order to attach the leads 8 in a simple manner to the terminals 7, the connection portion 11 is provided with the located on the underside of the switch 1, the first cover 12. The first lid 12 is according to Fig. 4 designed hinged. For this purpose, the first cover 12 is attached to the housing 2 by means of a film hinge 13. The first lid 12 is by means of in Fig. 3 shown locking hook 15 and locking cams 16, latching and / or snap hook o. The like., Which are located on the side of the housing 2, the housing 2 fastened. Furthermore, a pivoting hinge 14 serves to lock the first lid 12 on the housing 2, whereby a divergence of the housing 2 is prevented at this point. By means of a tongue and groove geometry 17, by means of an elastomeric insert o. The like. Closes the first cover 12, the housing 2 sealingly on the underside.

Again Fig. 2 can be seen, may be located in the separate terminal area 11, an electronic / electrical circuitry 18, which serves to control and / or regulation of the electric motor in the power tool. This electronics 18 is arranged on a printed circuit board 19 and inserted into the first cover 12. For this purpose, the printed circuit board 19 is locked in place in the first cover 12.

How to use the Fig. 5 sees, the housing 2 is configured approximately cuboid. The housing 2 is open at the side facing the actuator 6 side. On the open side of the housing 2, at the top, the one-piece, at least partially made of elastic material, second cover 20 is arranged, as one of Fig. 4 can take. The upper second cover 20 is designed in the region of the actuating member 6 as a thin-walled, elastic and approximately bell-shaped bellows 21. The bellows 21 surrounds the actuating member 6 by means of an opening 22 at a located in the actuator 6, in Fig. 7 indicated groove 23 positive and / or non-positive. The open side associated edge 24 on the housing 2 has an in Fig. 5 visible, circumferential groove 25, in which a circumferential web 26 of the second lid 20 according to Fig. 1 engages positively and / or non-positively.

An in Fig. 5 shown capacitor 27, which is used for the suppression of the electric motor of the power tool, is dust-protected in the housing 2 is arranged. For this purpose, the housing 2 has a receiving compartment 28 in which the capacitor 27 is located, which is closer Fig. 6 evident. The receiving compartment 28 is closed by means of the second lid 20.

How to use the Fig. 3 sees, the electrical connection 7 is designed in the manner of a push-in connection for easy insertion of the electrical supply line 8. The electrical connection 7 has a fixed contact spring 29 and / or a fixed contact web 29 'and a resilient movable contact spring 30, such that the electrical supply line 8 by means of a contact pressure between the two contact springs 29, 30 and between the contact web 29' and the contact spring 30 is pluggable recorded. An in Fig. 7 visible contact lug 35 leads from the fixed contact 4,4 'to the located in and / or on the housing 2 electrical connection. 7

A release of the electrical supply line 8 in the electrical connection 7 is made possible by means of a control cam 31 in that the control cam 31 can act on the movable contact spring 30 of the electrical connection 7. How to use the Fig. 3 and Fig. 4 sees, this is the control cam 31 configured as a rotatable wheel 32 with an eccentric 33, wherein the eccentric 33 moves the movable contact spring 30 against the spring force upon rotation of the wheel 32. Conveniently, the wheel 32 is rotatably mounted in the first cover 12, so that the wheel 32 is accessible for releasing the electrical lead 8 in closed by means of the first cover 12 housing 2. If desired, the wheel 32 may also be movably injected into the first cover 12 during manufacture by selecting a plastic for the wheel 32 which does not connect to the plastic for the cover 12. If according to Fig. 2 a printed circuit board 19 with electronics 18 in the first cover 12 is located, may be located in the circuit board 19 corresponding to the opening 32 in the printed circuit board 19 to allow an action of the eccentric 33 on the terminal 7. However, a simple alternative to the arrangement of the control cam 31 is to open the lower first cover 12 for releasing the push-in connections 7, so that the user can then act directly on the push-in connection 7.

The closer embodiment of the contact system 3 is in Fig. 7 to see. The switching contact 5 is movably mounted with respect to the actuating member 6 and is by means of an elastic member 34 with the actuating member 6 in operative connection. As a result, the switching contact 5 is switchable during movement of the actuating member 6 against the force of a compression spring 47 located in the housing 2 with a kind of snap movement between the two positions.

For the movable mounting of the switching contact 5, the actuator 6 comprises a carriage 37 in the manner of a frame, wherein the frame for the carriage 37 in approximately U-shaped with a base 38 and two side legs 39, 39 'is configured. The pusher 36 is mounted on the carriage 37. On the slide 37, a slider 40 is movably mounted, wherein the slider 40 is optionally guided on the base 38 of the U from the carriage 37. The switching contact 5 is arranged on the slider 40 by means of one of the elastic system in the second position to the fixed contact 4, 4 'serving system spring 42.

The elastic member 34 is like a leaf spring, and suitably designed as a plastic leaf spring and is held centrally on the slider 40 in a loop-like receptacle 43. Furthermore, the elastic element 34 is attached at one end to the carriage 37. Preferably, the two ends of the elastic element 34 are each molded on a side leg 39, 39 'of the U from the carriage 37. For coupling the slider 40 with the carriage 37 is a slot 44 on the side legs 39, 39 'of the U's from the carriage 37, wherein a pin 41 engages the slider 40 in the slot 44 for coupling. Preferably, on both sides engage two pins 41 in each case a slot 40 on the two opposite side legs 39, 39 'of the U from the carriage 37 a. How to continue the Fig. 5 extracts, the end of the pin 41 is provided with a ball catch 45, which cooperates, for example, with a backdrop in the housing 2 upon movement of the carriage 37 to produce the snap effect.

Furthermore, there is a spark shield 46 on the slider 40, as in Fig. 7 you can see. The spark shield 46 is movable between the two fixed contacts 4, 4 'when switching between the two positions. As a result, any arc occurring when switching is interrupted, so that destruction of the contact system 3 is prevented due to such arcs.

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, the invention can not only be used in power tool switches, but can also be found on other switches, such as those for control devices, electrical household appliances, electrical gardening equipment, kitchen appliances, machine tools o. The like. Use. Furthermore, it may also be switch without actuator in the manner of a relay. Finally, the seal according to the invention for the electrical supply to the electrical connections to other supplied by a power source electrical equipment, such as control units, junction boxes o. The like., Can be used advantageously.

Reference numeral list:

1:

(electrical) switch

2:

casing

3:

Contact system

4,4 ':

fixed contact

5:

switching contact

6:

actuator

7:

(electrical) connection / push-in connection

8th:

(Electrical supply

9:

Sealing (at the connection)

10:

breakthrough

11:

(separate) connection area

12:

(first) cover

13:

film hinge

14:

swivel hinge

15:

locking hook

16:

locking cams

17:

Tongue and groove geometry (on the first cover)

18:

electronic / electrical circuitry / electronics

19:

circuit board

20:

(second) cover

21:

bellows

22:

Opening (in the bellows)

23:

Groove (in the actuator)

24:

Edge (on the housing)

25:

Groove (on the edge)

26:

web

27:

capacitor

28:

receiving compartment

29:

(fixed) contact spring (from connection)

29 ':

(fixed) contact bridge (from connection)

30:

(movable) contact spring (from connection)

31:

control cam

32:

(rotatable) wheel

33:

eccentric

34:

elastic element

35:

contact tag

36:

Pusher (from actuator)

37:

carriage

38:

Base (of sled)

39.39 ':

Side legs (of sleds)

40:

pusher

41:

Pin (on the slide)

42:

system spring

43:

eyelet-like recording

44:

Long hole

45:

ball catch

46:

radio shield

47:

compression spring

48:

half shell

Claims (16)

1. Electrical switch for an electrical appliance, in particular for an electric tool, such as a drill, grinder, saw, plane, angle grinder or similar, comprising a housing (2) and having a contact system (3) situated in the housing (2), having at least one electrical connection (7) for an electrical line (8), located in the housing (2) and connected to the contact system (3), having an aperture (10) assigned to the connection (7) inside the housing (2) for the electrical line (8), having a seal (9) to the inside of the housing (2) surrounding the electrical line (8) in form of a capsule, wherein the seal (9) is made of a flexible resilient material, wherein the seal (9) lines the aperture (10) in a sealing manner, wherein the seal (9) makes contact with a contact pressure on the respective line (8) for the connection (7), and wherein the electrical connections (7) are arranged in the housing (2) in a separate connection region (11) designed in the form of a chamber, and in particular having an actuation member (6) for switching actions on the contact system (3), characterised in that the connection region (11) is provided with an openable first cover (12), in that the first cover (12) is attached to the housing (2) by means of an integral hinge (13) and/or a pivot hinge (14) and in that the seal (9) is surrounded by half-shells (48) on the first cover (12) and on the housing (2).
2. Electrical switch according to claim 1, characterised in that the seal (9) has a substantially round cross-section, in particular in the form of a sleeve, and in that the seal (9) is preferably made of a thermoplastic elastomer, a foam or similar.
3. Electrical switch according to claim 1 or 2, characterised in that the seal (9) is inserted in the aperture (10), is placed at a corresponding edge on the surface of the housing (2) in the region of the aperture (10), is injected in the aperture (10), or similar.
4. Electrical switch according to claim 1, 2 or 3, characterised in that the first cover (12) can be attached to the housing (2) by means of latching and/or snapping hooks, locking hooks (15) and latching cams (16) or similar, which are in particular located on the side of the housing (2), and in that preferably the first cover (12) sealingly closes the housing (2) by means of a tongue and groove geometry (17), by means of a resilient insert or similar.
5. Electrical switch according to any of claims 1 to 4, characterised in that an electronic/electrical switch arrangement (18), in particular for controlling and/or regulating an electric motor of the electrical appliance, is located in the separate connection region (11), in that preferably the electronic/electrical switching arrangement (18) is arranged on a printed circuit board (19), in that the electronic/electrical switching arrangement (18) is also preferably inserted in the first cover (12), and in that still the printed circuit board (19) is also preferably secured by latching into the first cover (12).
6. Electrical switch according to any of claims 1 to 5, characterised in that the housing (2) has an approximately cuboid design, in that preferably the housing (2) is open on the side facing the actuating member (6), in that a single-piece second cover (20) made at least partially from a resilient material is also preferably arranged on the open side of the housing (2), in that the second cover (20) is also preferably designed as a thin-walled, resilient and approximately bell-shaped boot in the region of the actuating member (6), wherein in particular the boot (21) encloses the actuating member (6), for example at a groove (23) in the actuating member (6), in a form-fitting and/or force fitting manner by means of an opening (22), and in that the edge (24) on the housing (2) facing the open side also preferably comprises a peripheral groove (25) in which a peripheral strip (26) of the second cover (20) engages in a form-fitting and/or force-fitting manner.
7. Electrical switch according to any of claims 1 to 6, characterised in that a capacitor (27) is arranged in the housing (2), in that the capacitor (27) is preferably located in a receiving compartment (28) in the housing (2), and in that the receiving compartment (28) is also preferably closed by means of the second cover (20).
8. Electrical switch according to any of claims 1 to 7, characterised in that the electrical connection (7) is designed in the form of a push-in connection for inserting the electrical line (8), and in that the electrical connection (7) preferably comprises a fixed contact spring (29) and/or a fixed contact strip (29') and an elastically movable contact spring (30), such that the electrical line (8) is received by means of a contact pressure between the two contact springs (29, 30) or alternatively between the contact strip (29') and the contact spring (30) in a plug-in manner.
9. Electrical switch according to any of claims 1 to 8, characterised in that by means of a control cam (31), which acts in particular on the movable contact spring (30) of the electrical connection (7), a release of the electrical line (8) in the electrical connection (7) is enabled, in that preferably the control cam (31) is designed as a rotatable wheel (32) with an eccentric tappet (33), wherein during rotation of the wheel (32), the eccentric tappet (33) moves the movable contact spring (30) counter to the spring force thereof, and in that the wheel (32) is also preferably rotatably mounted in the cover (12) and/or removably inserted in the first cover (12), in such a way that the wheel (32) is accessible for releasing the electrical line (8) when the housing (2) is closed by the first cover (12).
10. Electrical switch according to any of claims 1 to 9, characterised in that the contact system (3) comprises a fixed contact (4) and a switch contact (5), wherein, in a first position, the switch contact (5) is remote from the fixed contact (4) and, in a second position of the switch contact (5), abuts the fixed contact (4), in that the switch contact (5) is mounted movably relative to the actuating member (6), and in that the switch contact (5) is held in operative connection with the actuating member (6) by means of a resilient element (34), such that when the actuating member (6) moves, the switch contact (5) can be switched between the two positions, in particular with a kind of snap-action movement.
11. Electrical switch according to any of claims 1 to 10, characterised in that the switch contact (5) is designed in the form of a contact bridge for bridging two fixed contacts (4, 4'), in that preferably a contact lug (35) leads from the fixed contact (4, 4') to the electrical connection (7) for the electrical line (8) located in the housing (2), which in particular acts as the supply of the electrical voltage to the contact system (3), and in that the electrical connection (7) is also preferably designed in the form of a push-in contact.
12. Electrical switch according to any of claims 1 to 11, characterised in that the actuating member (6) comprises a pushrod (36) for manual movement, which in particular projects out from the housing (2), in that the actuating member (6) preferably comprises a carriage (37) in the form of a frame, wherein in particular the pushrod (36) is applied to the carriage (37), and in that the frame for the carriage (37) is also preferably designed in an approximately U-shape with a base (38) and two side legs (39, 39').
13. Electrical switch according to any of claims 1 to 12, characterised in that a slide (40) is movably mounted on the carriage (37), in that preferably the slide (40) is guided on the base (38) of the U-shape of the carriage (37) and in that the switch contact (5) is also preferably arranged on the slide (40), in particular by means of a system spring (42) serving for the resilient attachment to the fixed contact (4, 4') in the second position.
14. Electrical switch according to any of claims 1 to 13, characterised in that the resilient element (34) is designed as a leaf-like spring, in particular as a plastic leaf spring, in that preferably the resilient element (34) is held on the slide (40), where applicable, centrally as well as in particular in an eye-like recess (43), and in that preferably the resilient element (34) is attached at one end to the carriage (37), in particular both ends of the resilient element (34) are each moulded onto the side leg (39, 39').
15. Electrical switch according to any of claims 1 to 14, characterised in that a slot (44) is located on the side leg (39) of the U-shape of the carriage (37), in that a pin (41) is preferably engaged with the slide (40) in the slot (44), wherein preferably on the two side, two pins (41) each engage in a slot (40) on the two opposing side legs (39, 39') of the U-shape, in particular in such a way that the pin (41) and the slot (44) are used for coupling the slide (40) to the carriage (37), and in that the end of the pin (41) is also preferably provided with a ball latch (45) interacting with the housing (2) during movement of the carriage (37), in particular for support during generation of the snap-on effect.
16. Electrical switch according to any of claims 1 to 15, characterised in that a spark shield (46) is located on the slide (40), which can move between the two fixed contacts (4, 4') during switching between the two positions, in such a way that a potential arc arising during switching can be interrupted.

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