DE4413227C2 - Electrical built-in switch, with a rocker-type actuator - Google Patents

Description

The invention relates to an electrical, rocker-type built-in switch, especially for installation in household appliances, with a switch housing, in the fixed contacts and at least one bridging the fixed contacts Movable contact are arranged with one on the switch housing pivoted actuator, the one the movable Has contacts in its switching positions switching approach, here the switch housing is towards the side of the actuator except for a breakthrough through which the shifting approach penetrates, whereby for Fastening the rocker-type switch to a device wall opening, especially of a household appliance, areas of the switch housing itself Support the inside of the device wall and cutouts on Actuator on areas lying in the wall openings Slidingly support the device wall. Such switch DE-GM 80 22 002 are often used because they are easy to attach to the walls of Allow devices.  

Here, the main part of the housing from the bottom of the Wall pushed to the wall opening, while the other Actuator from the outside then on the switch housing is attached. The switch is attached in that areas the device wall between the switch housing and the actuator be pinched. In the previous switches, the actuator was relatively large, because the opening in the switch housing itself has been covered by the actuator.

In DE-GM 76 33 267 is an electrical rocker-type built-in switch shown, which is similar to the switch according to the preamble of claim 1. The switching approach is inside the Switch housing.

A toggle switch is shown in DE 30 24 510 A1. The Switch housing itself is built into the device wall. actuator and switching approach are integrally formed.

The built-in switch according to DE 31 27 611 A1 is in a Device wall opening attached. For this purpose, the actuator has Recesses that slide against areas in the opening. From the inside of the device, a frame-shaped part is placed over the Switch housing pushed. The frame-shaped part is supported resilient arms on the inside of the unit.

The illuminated switch according to DE 31 51 273 A1 has on its Actuator on a light guide. In a preferred position the light guide with one end in front of a lighting unit.

The actuator after the switch in DE 30 34 112 A1 a light guide. Colored display areas vary depending on Actuator setting via the light guide from a lighting unit shone.

In the device for opening and closing electrical circuits According to DE 39 24 032 C1, the actuator is with a projection provided with a plunger-like part inside the switch housing cooperates. The housing can be assembled in a modular manner become.

The object of the invention is to close the switch mentioned above shape that while maintaining the previous advantages, such as light Assembly, protection against the ingress of contaminants into the Different, especially narrow, switch housing interiors Actuators can be attached to the switch housing, wherein depending on the training, a lighting device should also be provided. Finally, the switch according to the invention should have a cheap structure and one have easy manufacture.

This object is achieved in that the shift approach in a beyond the opening of the switch housing Shifter extension continues on the Actuator can be retrofitted when installing the switching device is. This arrangement makes it possible to have the most varied Actuators can be easily attached to the gear hub. Furthermore the extension can be made so narrow that even rocker-like Actuators with a small width on the extension  are attachable. Finally, the molding allows a simple one Manufacture and assembly of the switchgear. There is also the possibility depending on the formation of the molding, the most varied of rockers Fasten.

The switching approach itself ensures that this the Breakthrough in the switch housing closes securely, so that contamination cannot get inside the housing. It is an advantage if that Actuator and, if necessary, the shift approach in the area of the Support areas lying parallel to the swivel axis lying breakthrough crossing the width of the actuator having. This breakthrough allows for a wide variety of training the support areas different rocker-type actuators to this to be able to fasten without areas of the actuator during installation or shifting protrusion protrude. With a particularly advantageous one Embodiment are the support areas on a two rib connecting opposite sides of the device wall opening intended. This rib offers extremely safe and firm support areas, moreover, the formation of the wall opening of an electrical Device, such as household appliances, further simplified. Through the two sides connecting ribs, the support areas can be relatively small and thin be designed, because overall a sufficient strength over the rib is self-generated. It is beneficial if the rib is on her entire width in cross section is formed as a circular section, because this results in the sliding movement of the actuator on the Support area results in a safe bearing point, moreover this is the Manufacturing has been further simplified.  

The extension advantageously extends through the device wall opening in some areas. In this way, a secure attachment possible between actuator and extension, moreover can the extension can be made relatively narrow in thickness, so too to be able to attach rocker-like actuators with a narrow width. Through the extension and the side walls of the rocker switch the actuator is compact, so that even at low Wall thickness of the actuator ensures a secure bracket is. The narrow wall opening itself provides protection against any lateral forces that can act on the actuator, since the actuator can then be supported on the edges. By gripping the extension through the wall opening the installation is further simplified since the extension of the on the The rear of the device is located on the front of the Device wall is visible and accessible and protrudes, so that the Actuator can be easily slid onto and attached to the extension is.

Conveniently, the extension consists of two arms with notches that of counter-latches provided on the actuator for determining the Actuator can be engaged. This training allows for a simple inexpensive manufacture of the shift approach and thus the Switch housing, on the other hand, the two arms form a spring section of the securely latching the actuator to the shift attachment if necessary can set interchangeably.

Here it is recommended that the two arms in some areas on both Sides of the wall opening rib are provided, as a result of which the rib itself increases the spring force of the arms for the actuator, since the  Can support arms on the wall opening rib. To make the breakthrough for the switching approach even better against the ingress of contaminants to be able to close, it is recommended that the shift approach one Breakthrough closing cover is molded. This cover allows the switchgear to be manufactured cheaply because of the Formation of the cover, the manufacturing costs can not be increased because the cover with the extension itself is molded on immediately can, moreover, the cover offers greater protection against the Penetration of contamination. The cover is favorable here designed like a hood, advantageously such a cover a surrounding the breakthrough facing the actuator collar-like structure of the switch housing overlaps like a hood. By this measure is an extremely safe protection against the ingress of Moisture and contamination in the switch housing, in addition, the cover not only the breakthrough in the Switch housing covered, but also the wall opening in the Device wall covered from the inside. By spreading the collar-like structure thanks to the hood-like cover still achieved a labyrinthine seal that prevents the penetration of Impurities further complicated. The manufacturing costs as well as the Assembly, in turn, is not significantly affected as these areas immediately in the manufacture of the shift approach or Switch housing can be molded with.

In a particularly advantageous embodiment of the invention the collar-like structure the bearing for the pivot axis for the Switch on the switch housing. This measure will achieved a secure bearing for the swivel axis. It is recommended that that the counter bearing for the pivot axis of the shift approach to the  hood-like cover of the switching approach is provided. By the Immediate molding of the bearing point and counter bearing point on collar-like structure or on the hood-like cover results in a inexpensive training and especially easy assembly, because as soon as the counter bearing intervenes in the bearing, that Actuator is attached to the switch housing and at the same time Wall areas of a device wall, such as a household appliance, are included. Additional bearing points or counter bearing points are no longer required. It is advantageous if the gearshift lug carries a bridge and the breakthrough has a corresponding web receptacle, so as to Montage an easy association between the correct introduction of the Achieve switch insert in the switch housing. In connection with the previously described measures regarding the bearing points and the As mentioned, counter bearing points are considerably simplified.

In a further exemplary embodiment, this is carried on the shifting lug seated actuator a light guide element, which in at least one Switch position with one end in front of a lighting device is arranged. This training allows in conjunction with the simple Determination of the actuator either, the switch with or without to provide a lighting device so as to to be able to easily display the desired switching state of the switching device. Here, the light guide element allows safe light guidance, even if the actuator is relatively narrow.

It is advantageous if between the light guide element and the Lighting device a housing window is provided, so too secure the lighting device itself from intrusion of To be able to secure contamination. It is particularly advantageous if that  Housing windows in several different colors Window sections is divided so that the one fiber end in the individual switching positions of the actuator before different colored windows. This ensures that depending on the movement of the rocker-type actuator Switching state different colors at the end of the light guide element on Actuator become visible. Through the individual windows furthermore ensures that by a single light source Different colors are displayed, so that a cheap Manufacture of the switching device is possible.

In a particular embodiment of a switch in which not recommends all the features of the previous claims must be met it that that on at least two outer sides of the housing end pieces are provided, which are at one end at the bottom of the Support device wall. Such an arrangement allows a safe one Fixing the switch housing on a device wall, for example one Household appliance, since the points of attack on the back of the device wall themselves can be arranged far apart. Here you can Switch paddles of different sizes with one and the same switch housing can be used because the extensions widen the Space below the wall of household appliances is possible. Here recommends it is different for actuators of different sizes large attachments can be attached to the switch housing, so that to take into account the respective circumstances, but in particular in order to the actuator and the support surfaces on the extensions a Safe and inexpensive fixing of the switching device on the device wall to achieve, for example, a household appliance.  

It is of particular advantage if one of the end pieces for receiving the lighting device is formed, since in this way the desired lighting device on the actual switch housing is attachable. It is particularly favorable here if that Extension piece accommodating the lighting device made of translucent, there is in particular crystal-clear material, as this makes it possible exists, the lighting device absolutely independent of a window encapsulate, so that the endpiece as the switch against intrusion is protected from contamination. The crystal clear extension with the Lighting device is then either one end of the Light guide element or, however, the device wall of a household appliance a translucent area in the area of the lighting device.

In a favorable embodiment of the invention, the Attachments releasably attached to the switch housing. By a such an arrangement ensures that even during assembly itself It can be determined which attachments and thus which Belechtungseinrichtung or which actuator to build the Switch are used. It is advantageous for assembly here if the two end pieces are interchangeable on two switch housing sides are attachable, so as to simplify the assembly, since now it is possible, with the same end pieces, to attach them to the two Attach housing sides. If there are unequal attachments furthermore the guarantee, for example, if the end piece with a Lighting device is formed, this on one or the on the other side to the switch housing.

In a particular embodiment, the Attachments on the switch housing dovetail guides  provided, which engage in corresponding counter bearings of the end pieces, because in this way a positive definition of the end pieces on Switch housing is possible.

In a further exemplary embodiment of the invention, one of the Attachments U-shaped holding arms on two attack opposite sides of the housing. Here are the Arms formed with notches, which are in corresponding counter detents of the Switch housing for adjusting the distance between the attachment and Intervene switch housing. Through the U-shaped grasping of the Switch housing with holding arms results in a secure fixation on the one hand the end pieces on the switch housing, the other is now the distance the attachments to the actual switch housing with one and the same Embodiment variable, thirdly, the distance of the Points of contact between the attachment piece and the device wall Household appliance changed from the opening of the household appliance wall become. This creates the possibility, optionally even after Assemble the switch to different actuators to fix the switch housing.

For example, to be able to determine whether the built-in switch should be designed as a button or switch is inside the Switch housing lying end of the pivoting switching approach spring-loaded slider provided, which is in the bottom catches of the Switch housing engages. The individual floor catches are each different depending on how the switching device should be designed designed.

In the drawing, the subject of the invention is in several Exemplary embodiments shown and that show:

Fig. 1 cut the rocker-like switch in the longitudinal,

Fig. 2 is a partial section along the line II-II of Fig. 1,

Fig. 3 is a partial section along the line III-III of Fig. 1,

Fig. 4 shows the switching approach with actuator, partly in section along the line IV-IV of Fig. 1,

Fig. 5 is a cross section along the line VV of Fig. 4,

Fig. 6 is a plan view of the rocker-like actuator on a smaller scale,

Fig. 7 is a plan view of a wall opening of a household appliance,

Fig. 8 is a longitudinal section through the wall of a household appliance,

Fig. 9 is a plan view of the switch, partly in section,

Fig. 10 is a side view of the switch,

Fig. 11 is a partial section along the line XI-XI of Fig. 9,

Fig. 12 shows a further embodiment of the switch,

Fig. 13 is a wall opening device in longitudinal section,

Fig. 14 is a plan view of the device wall with which the switch is equipped.

The rocker-type switch is constructed as a built-in rocker switch 15 . It has a switch housing 16 . This switch housing is closed on all sides except for an opening 17 .

The built-in rocker switch 15 is installed in a device wall 18 of a household appliance. This has an opening 19 in which projections 20 are provided on two opposite sides.

The switch housing 16 , as shown in FIG. 1, is provided on both sides with extensions 21 which are each supported by a projection 22 on the rear of the device wall 18 .

The built-in rocker switch 15 is equipped with a switching extension 23 . This shift approach is pivotally mounted about an axis 24 . The switching lug 23 projects through the opening 17 in some areas. An actuator 25 is fastened to the shifting attachment itself. This actuator has hollow cylindrical sections 26 . Here, the hollow cylinder-like section is designed such that it can slide against the crescent-shaped support region 20 in the opening 19 of the device wall 18 when the actuating member 25 is pivoted. When the actuator is pivoted, the hollow cylinder-like sections slide on the sickle-like projections. The central axis of the hollow cylinder coincides with the pivot axis 24 . When fastening, areas of the device wall 18 are thus clamped between the actuator and the switch housing.

Fixed contacts 27 and movable contacts 28 are provided in the interior of the switch housing 16 . The fixed contacts 27 protrude with connections 29 and 30 from the switch housing on the underside. The movable contacts 28 are formed on the fixed contact 27 , which carries the connection 29 . As shown in FIG. 3, these form an approximately U-shaped arrangement, the fixed contact 27 forming the central web. As can still be seen from FIG. 3, the movable contacts 28 are provided with a dent 31 . This dent comes into contact with the lower end 32 of the switching lug 23 . In order to be able to control the two movable contacts 28 , which form resilient contact arms and bear against the end 32 of the switching attachment, the end 32 , as can be seen in FIG. 5, has recesses 33 and 34 . These recesses allow the two movable contacts 28 to be released from the fixed contacts 27 one after the other. By Eigenfe change of the movable contacts, the dents 31 can engage in the recesses 33 and 34 , respectively.

As can be seen from Fig. 1, the lower end 32 of the switching lug 23 has a blind hole in which a spring-loaded slider 35 is arranged. This sliding piece is in Fig. 1 between two ribs 36th With a pivoting of the actuator 25 , the end 32 of the switching approach is moved either to the right or to the left, the slider 35 overcoming the ribs 36 . These ribs create a switch setting for the actuator. In dash-dotted lines, only a prism-shaped recess is provided instead of the ribs. In this case, the switching device would be designed as a button, wherein after movement of the actuating member 25 in one direction the slider is resiliently pre-tensioned, so that when you release the actuator, the switching approach and thus the actuator is moved back into its position shown in Fig. 1.

From Fig. 1 shows further that 16 dovetail guides are provided on the outside of the switch housing. These guides engage in appropriately designed recesses 38 which are in extensions 21 ; and 39, 40 are provided. The extension piece 40 serves only to support the switch housing on a device wall 18 , while the extension piece 39 supports the receptacle for a lighting device 41 in addition to this task. This lighting device consists of a series resistor and a glow lamp. In addition, the extension piece 39 is still provided with connections 42 to the power connection of the lighting device. A window 43 is also seen in the area of the glow lamp of the lighting device 41 . This window works with a Lichtleitere element 44 , which is fixed in the actuator 25 in such a way that the second end of the Lichtleite relementes 44 on the top of the actuator 25 is visible.

It should also be mentioned here that the dovetail-shaped guide 37 or the corresponding recess 38 extends almost over the entire width of the switch housing. Only at one end the extension 39 is provided with a locking projection 45 which engages in a counter detent 46 . For sliding movement of the recess on the dovetail guide 37 , but in particular for inserting the locking projection 45 behind the counter detent 46 , the housing has an insertion bevel 47 . It should also be pointed out here that the swallow tail-shaped guide 37 must not only be provided on the two narrow sides of the switch housing, but, as shown in FIG. 2, also on the two large longitudinal sides. The lugs 39 , 40 can therefore be attached to the switch housing on different sides. This is particularly important for the extension with the illuminating device 41 , since it is now possible to arrange this illuminating device on a long side of the switch housing 16 , for example in the absence of the light guide element, in which case the light could exit through a window 55 in the device housing be educated.

It should already be mentioned here that the extension piece 39 could also be made of crystal-clear material, so that in this case the window 43 would be omitted.

As can be seen from Fig. 1, the opening 17 of the switch housing 16 is equipped with a collar-like structure 48 . This structure 48 surrounds the switching extension 23 in some areas. Here, the structure 48 has a channel-like recess (not shown), into which a web 49 of the switching attachment 23 engages. The bridge and the channel are used to clearly assign the switch set to the switch housing during assembly.

The switching approach 23 is tet with a cover 50 . In the exemplary embodiment shown, this cover is designed like a hood and overlaps the collar-like structure 48 . Here, this cover 50 is designed so that in each switching position of the actuator 25 ei ne safe coverage of the opening 17 is ensured. As can be seen from Fig. 1, the hood-like cover 50 extends towards its end keilför shaped, which provides a particularly good closure for the breakthrough.

The shift extension 23 continues over the cover 50 , with an extension 51 which consists of two springs 52 the arms. At their free end, the arms 52 have a nose 53 which engages a counter nose 54 on the actuating member 25 . The spring strength of the arms 52 is designed so that a secure mounting of the actuator supply member is ensured on the switching approach. In addition, this connection allows the switching approach to be equipped with different large rocker-like actuators 25 .

It remains to be added that if the attachment consists of a crystal-clear material, the device wall 18 of a household appliance would either have a thinned material area through which the lamp would shine or, as shown in FIG. 2, it would carry an insertable window 55 . As can still be seen from FIG. 2, the connections of the illuminating device are in direct contact with the connections 42 which protrude from the housing.

From Fig. 4 it is apparent that the cover 50 and the opening 19 in the device wall 18 from the bottom completely covers, so that no contamination can enter the interior of the switch housing through the opening. Rather, they are derived via the hood-like cover.

The actuator 25 has on the two opposite sides according to FIG. 4, the mentioned hollow cylinder-shaped recesses 26 . Here could, if the rocker-like actuator 25 should be made even narrower, the recess through the entire wall he stretch, so that the overall wall width could be made somewhat thinner.

It should still be stated here that the switch housing itself from a top and a slide-in by means provided a snap connection equipped lower part is, the definition of the aforementioned locking connection is done.

In Fig. 3 it can be seen that the movable contacts are U-shaped. Here, the two ends of the legs in the switch-on position with the fixed contacts th Each individual leg can be controlled with its recesses 33 , 34 via the switching attachment. The legs are so resiliently loaded that, provided there is no shifting lug or a recess in the area of the dents 31 , they are moved towards one another and bear against a shoulder 56 . In Fig. 3 this concern is shown on the paragraph 56 at the upper leg, while the lower leg is moved over the not shown th switching approach against a fixed contact. The connections for the fixed contacts and the lighting device are equipped with an opening into which a projection of the extension piece or the switch housing engage.

In the exemplary embodiment according to FIGS. 9 to 11, one end piece 21 has two resilient arms 57 . These arms surround the switch housing 16 . The arms are provided with a dovetail-shaped recess 38 which is arranged on the dovetail-shaped guide 37 . The Füh tion itself is equipped on the side facing the arms 57 with locking projections 59 into which a spring element 60 arranged at the end of the arm 57 engages with a Ver locking. The extension piece can now, depending on which latching recess 59 the spring element 60 engages, befeet to different degrees from the housing 16 . Due to the dovetail-like guidance, a secure mounting of the extension piece is nevertheless guaranteed, so that this can accomplish its task, namely support the switch housing on the underside of the appliance wall of a household appliance.

In the exemplary embodiment according to FIGS. 12 to 14, the extension 51 is integrally formed on the cover 50 , in this case the extension 51 does not form a direct continuation of the switching approach. By forming the arms 52 of the United extension 51 on the hood-like cover 50 , a slightly larger distance between the two arms 52nd This creates a through opening 58 through the actuating member and through the shifting projection, which extends between the two longitudinal sides of the actuating member and whose width is equal to or greater than the width of the rib 61 . This opening has the hollow cylindrical recesses 26 on the wall sides of the actuator. The projections or support areas 20 in the device wall 18 are arranged on a rib 61 which, in its cross section, as shown in FIG. 3, is formed as a circular section. The two ends of the rip pe then form the support regions 20 .

For pivotable mounting of the actuator of the switching approach, the pivot axis 24 engages through a bearing, not shown, in the kragenarti gene structure 48 , while the edge of the hood-like cover 50 carries the corresponding counter bearing for the pivot axis 24 . It should be mentioned here that in another embodiment, the pivot axis could also be formed immediately on the actual shifting attachment and could then intervene during assembly with the ends of the axis in the corresponding bearing points of the collar-like construction 48 .

It is especially to be emphasized that, as is apparent from FIGS. 1 and 12 in that the extension 51 and the arms 52 are also visible on the upper side of the device wall 18, that is, when preparing the switch housing from the back print te of the wall 18 has the Extension or arms a centering effect for the wall opening. When mounting from the front of the actuator, the attachment then takes place, with the extension or the arm me forming a centering option, this time for the actuation rocker.

As already mentioned, the illustrated embodiments are only examples of implementations of the invention. These are not limited to this, but many other changes and applications are still possible. For example, the hood-like cover for the collar-like structure could be conical or different. The window 43 in the attachment 21 could either consist of several individual windows or cut from a window with several from, which are then divided into different colors, then depending on the position of the actuating element of the light guide end in front of different colored windows or window sections could. It should be particularly emphasized here that the cover and the extension are integrally formed on the shifting lug. The light guide element itself would not have to be constructed as a solid part, it could also consist of light guide fibers. Likewise, the actuation member 25 can be configured as a light guide element. It should also be stated that instead of a rocker switch, the switching device could also be a button and that the built-in switch can be used not only in household appliances, but as a switch or button to control power networks in motor vehicles. It also remains to be added that the rib in the device wall opening should not have a circular cross-section on its entire width. This is only of particular importance for the formation of the support areas or support jumps. Between these areas or projections, the rib could have a different shape, for example in such a way that it slightly loads the two arms of the extension of the shifting lug in the direction of the counter detents.

LIST OF REFERENCE NUMBERS

15

Installation rocker switch

16

switch housing

17

Breakthrough in

16

18

device wall

19

Opening in

18

20

Support areas in

19

21

extensions

22

Head start

21

23

switching approach

24

Axis of

23

25

actuator

26

hollow cylindrical section in

25

27

fixed contacts

28

movable contacts

29

.

30

connections

31

Dent in

28

32

End of

23

33

.

34

Recesses

32

35

slide

36

Ripping in

16

37

dovetailed Leadership

16

38

dovetailed Recess

21

39

extension

40

extension

41

Lighting device in

39

42

connections

43

Window in

39

44

Optical fiber element

45

Locking projection (

FIG.

3

)

46

Counter detent (

FIG.

3

)

47

Insertion slope (

FIG.

3

)

48

collar-like structure

16

49

Footbridge for

23

50

Coverage of

23

51

Extension on

23

52

Arms of

51

53

Nose on

52

54

Counter nose

25

55

Window in

18

(

FIG.

2

)

56

Paragraph (

FIG.

9

)

57

Arms of

21

58

Breakthrough in

25

and

23

59

catch projection

60

spring element

61

Rib in

19

Claims (25)

1.Electric, rocker-type built-in switch, in particular for installation in household appliances, with a switch housing in which fixed contacts and at least one movable contact bridging the fixed contacts are arranged, with an actuating member pivotably mounted on the switch housing and having a switching attachment which converts the movable contacts into their switching positions , Here, the switch housing is closed towards the side of the actuator except for an opening through which the switching lug penetrates, with a portion of the switch housing located on the inside of the device wall for fastening the rocker-type switching device to a device wall opening, in particular a household device Support and slidably support recesses on the actuator on areas of the device wall lying in the wall openings, characterized in that the switching extension ( 23 ) extends in a manner beyond the opening ( 17 ) molded extension ( 51 ) on which the actuator ( 25 ) can be retrofitted when installing the switch. 2. Switch according to claim 1, characterized in that the actuating member ( 25 ) and optionally the switching lug ( 23 ) in the region of the wall areas ( 19 ) lying support areas ( 20 ) lying parallel to the pivot axis ( 24 ) across the width of the actuating member Breakthrough ( 58 ). 3. Switch according to claim 1 or 2, characterized in that the support areas ( 20 ) on a two opposite sides of the device wall opening ( 19 ) connecting rib ( 61 ) are provided. 4. Switch according to claim 3, characterized in that the rib ( 61 ) is formed over its entire width in cross section as a circular section. 5. Switch according to one of claims 1 to 4, characterized in that the extension ( 51 ) through the device wall opening ( 19 ) engages in areas. 6. Switch according to one of claims 1 to 5, characterized in that the extension ( 51 ) on two arms ( 52 ) with notches ( 53 ), the provided on the actuator ( 25 ) counter detents ( 54 ) for fixing the actuator ( 25 ) is attacked. 7. Switch according to one of claims 1 to 6, characterized in that the two arms ( 52 ) are partially provided on both sides of the wall opening rib ( 61 ). 8. Switch according to one of claims 1 to 7, characterized in that the switching lug ( 23 ) is formed on the opening ( 17 ) closing cover ( 50 ) on which the extension ( 51 ) provided for holding the actuator is arranged. 9. Switch according to claim 8, characterized in that the cover ( 50 ) is designed like a hood. 10. Switch according to one of claims 1 to 9, characterized in that the cover ( 50 ) surrounds the opening ( 17 ) surrounding the actuating member ( 25 ) facing collar-like structure ( 28 ) of the switch housing hood-like. 11. Switch according to one of claims 1 to 10, characterized in that the collar-like structure ( 48 ) has the bearing point for the pivot axis ( 24 ) for the switching lug ( 23 ) on the switch housing ( 16 ). 12. Switch according to one of claims 1 to 11, characterized in that the counter bearing point for the pivot axis ( 24 ) of the switching lug ( 23 ) on the hood-like cover ( 50 ) of the switching lug ( 23 ) is provided. 13. Switch according to one of claims 1 to 12, characterized in that the switching approach ( 23 ) carries a web ( 49 ) and the opening ( 17 ) of the switch housing has a corresponding web receptacle. 14. Switch according to one of claims 1 to 13, characterized in that the actuating member ( 25 ) seated on the switching projection ( 23 ) carries a light guide element ( 44 ) which is arranged in at least one switching position with one end in front of a lighting device ( 41 ) is. 15. Switch according to claim 14, characterized in that a housing window ( 43 ) is provided between the light guide element ( 44 ) and the lighting device ( 41 ). 16. Switch according to one of claims 1 to 15, characterized in that the housing window ( 43 ) is divided into several different color window sections, so that the one fiber end in the individual switching positions of the actuator ( 25 ) in front of differently colored windows ( 43 ) lies. 17. Switch, in particular according to one of claims 1 to 16, characterized in that attachment pieces ( 21 , 39 , 40 ) are provided on at least two outer sides of the housing ( 16 ), which have one end on the underside of the device wall ( 18th ) support. 18. Switch according to claim 17, characterized in that differently large extensions ( 21 , 39 , 40 ) can be fastened to the switch housing ( 16 ) in the case of actuators of different sizes. 19. Switch according to claim 7 or 18, characterized in that one of the extension pieces ( 39 ) is designed to receive the lighting device ( 41 ). 20. Switch according to one of claims 17 to 19, characterized in that the attachment ( 39 ) receiving the lighting device ( 41 ) consists of translucent, in particular clear material. 21. Switch according to one of claims 17 to 20, characterized in that the extension pieces ( 31 , 39 , 40 ) are arranged releasably attachable to the switch housing ( 16 ). 22. Switch according to one of claims 17 to 21, characterized in that the two end pieces ( 39 , 40 ) are replaceably attachable to two to four switch housing sides. 23. Switch according to one of claims 17 to 22, characterized in that dovetail guides ( 37 ) are provided for holding the extension pieces ( 39 , 40 ) on the switch housing ( 16 ), which in corresponding counter bearings ( 38 ) of the extension pieces ( 39 , 40 ) intervenes. 24. Switch according to one of claims 17 to 23, characterized in that one of the extension pieces ( 39 , 40 ) has U-shaped holding arms ( 57 ) which engage on two opposite sides of the housing, in this case the arms ( 57 ) Detents ( 60 ) formed which engage in corresponding counter detents ( 59 ) of the switch housing ( 16 ) for adjusting the distance between the extension piece ( 39 , 40 ) and the switch housing ( 16 ). 25. Switch according to one of claims 1 to 24, characterized in that a spring-loaded slider ( 35 ) is provided on the inside of the switch housing ( 16 ) lying end of the pivotable switching lug ( 23 ) which on the ground catches ( 36 ) of the switch housing ( 16 ) intervenes, the floor catches are designed differently depending on the design of the built-in switch as a switch or button.