DE2036736A1 - Electric switch - Google Patents

Description

203S736

E. 9932
July 15, 1970 Li / Km

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ROB ERT BO SGH GMBH,? Stuttgart 1 (German)

Electric switch

The invention relates to an electrical switch, which can be operated by means of a key. '

■. - ■■■ -. '

If such a switch is inserted in an example of a device serving for operation of electrical system _f so this device can not be removed readily by unauthorized persons, but only by the person operating, which has the switch associated with that key.

10 9885/0974

_ ρ -

Robert Bosch GmbH τ> _Q q _{zo t} / rr _m

Stuttgart ^R 9932 WKm

The invention is based on the object of a switch to be designed at the outset so that it is designed for any sequence of switching steps and anyway its basic structure can be retained, and its assembly can also be carried out in an uncomplicated manner and under Can carry out waiver of screw connections and that finally, it is simple in construction and inexpensive to manufacture.

This object is achieved according to the invention by the combination of. Features solved that

a) a housing is provided which has an insertion opening for has a locking part located on the key,

b) that in the housing to the insertion opening a Guide hole connects, in which a driver by means of a guide pin is supported and rotatable by the key, ■ - · ■■ · "-.

c) that the guide pin at its the insertion opening facing side a recess for the positive recording of the locking part located on the key, ν-,.

d) that the driver at its opening facing away from the Einführw.ngsöffnung Side one firmly seated on the guide pin Has flange, '

e) that opposite to that surface of the flange seated on the guide pin that faces the introduction opening is, there is a guide surface in the housing,

f) that of the guide surface and that of this guide surface opposite surface of the flange seated on the guide pin, one surface has a latching cam and the other Surface a locking contour interacting with this locking cam

carries, ■ -

109885/09 74

Robert Bosch GmbH - 5 - _ _ _ . _m ■ _ Stuttgart. ^E 9932 Li / km

g) that a contact piece is provided with a projection into one at the opposite of the feed opening Side of the driver located recess opposite this driver inserted non-rotatable and by interposing a compression spring is resiliently supported at the bottom of this recess, and

h) that the contact piece can be brought into contact with mating contacts by rotating the driver and these mating contacts are attached to a cover plate, which at the same time is used to close the housing on the side facing the insertion opening and through there corresponding shape of the housing is secured.

Details of the invention are based on the in the drawing illustrated embodiment explained and described in more detail. ■

It shows

Fig. 1 that side of a switch according to the invention, .die an insertion opening for a switch to operate has the necessary key,

Fig. 2 shows the switch in section along the section line II-II in Fig. 1 and with the key inserted,

Fig. 3 shows the key from the side that is used when inserting of the key in the insertion opening faces the switch,

Fig. 4- a contact arm belonging to the switch in section according to the section line IV-IV in Fig. 2,

5 shows that side of the switch which faces away from the insertion opening and is closed off by a cover plate,

6 shows that side of the switch which has the insertion opening is turned away, without a cover plate, ■

109885/0974

Robert Bosch GmbH - 4- Stuttgart

R. 9932 Li / Km

7 shows the side facing away from the insertion opening of an im Switch located driver,

8 shows the side of the driver facing the insertion opening ,

9 shows a latching cam belonging to the switch in section along the section line IX-IX in FIG. 8,

10 is a side view of the driver,

11 shows a side view of the driver rotated by an angle of 90 ° compared to FIG. 10,

Figure 12 is a side view of an opposite to insertion housing section of the Switch,

Fig. 13 only the housing from the side that the The inlet opening is turned away,

14 shows the profile of one used in the switch Latching contour and

Fig. 15 a further profile of the east contour »

The switch shown has one of insulating _s existing iia substantially rotationally symmetrical housing which at its ·? In Figo 1 visible front side two breakthroughs 21,22 for drying out of possible way in the bucket of the switch -sich "forming condensation water and a Einfuhmngsöffniivig 23 for the locking part 24 of a key

25 (Fig * 2 et al. 3) "possesses" by means of which the switch can be actuated ^ Inside the housing 20, the insertion opening 2J © ine guide pinion 26 adjoins, in which a Mitneiiif-SR 27 by means of a guide pin 28 stored and cte? eli dan key 25 Terarebbar is »The guide pin

26 (Fig. 7-2,1C iiacl 11) is on its side facing the introduction so opening 2 "- with a recess 29 for the positive reception of the locking device 24 located on the key 25 and on its the introduction opening 25 angled side siifc a firmly aa iiaia seated flange 30

Robert Bosch GmbH _{Ώ QQZO T.} / _Vm

Stuttgart ^{R 9952 Ll / km}

Mistake. A guide surface 31 is provided in the housing 20 (FIG. 13) ^1S *, which is located opposite that surface 32 of the flange 30 seated on the guide pin 28 which faces the insertion opening 23 in the mounted state of the driver 27. Of the two / surfaces 31 »32, one surface is provided with a latching cam 33 (FIG. 9) ″ and the other surface is provided with a latching contour 34 (FIGS. 14 and 15) interacting with this latching cam 33 locking cams 33 arranged on the flange 30 of the driver 27 associated with surface 32 and the locking contour 34 on the guide surface 31. Furthermore, the switch has a contact piece 35 (Fig. 2,4, and 6), which with a forward W leaps 36 is inserted into a recess 37 located on the side of the driver 27 facing away from the insertion opening 2J5 so that it cannot rotate with respect to this driver 27 and is flexibly supported on the bottom 39 of this recess 37 by interposing a compression spring 38. The contact piece 35 can be rotated by rotating the driver 27 Bring mating contacts 40, 41, 42, 43 into contact, which are fastened to a cover plate 44 (FIG. 5) made of insulating material of the housing 20 is utilized on the side facing away from the insertion opening 23 and is secured there by corresponding shaping of the housing 20.

The key. 25 has a wing 45 made of flat material on its closing part 24, which has the strength ^ 'nat.

Accordingly, a slot 46 is incorporated into the driver 27 as a recess 29 for receiving this wing 45, the width b 'of which is adapted to the thickness b of the wing 45. Furthermore, the wing 45 has Hinterschnexdungen 47 for the Engagement of a protruding into the guide bore 26, firmly on the Housing 20 seated locking collar 48. This locking collar

- 6 109885/0 9 74

Robert Bosch GmbH _{Ώ n} r »^ o τ · / ν

Stuttgart ^{R 9952 Ll / Em}

is provided with interruptions 49, which then lie in the projection of the slot 4-6 when the driver 2? is in its starting position. At the tail he snows 47 is followed by a provided on the key 25 limiting collar 50, which rests in the inserted state of the key 25 on the locking collar 48 and ^{is adapted with its diameter d 1 of} a drilled portion 51 of the insertion opening 23.

When a switching operation is carried out, the latching cams 33 and the latching contour 34 perform a relative movement which on an imaginary, concentric to the guide pin 28 lying circular path runs. In the preferred example according to the drawing, this relative movement comes about in that the locking cam 33 seated on the driver 27 when Rotation of the driver 27 relative to the locking contour seated on the guide surface 31 of the fixed housing 20 34 is moved.

It has proven to be expedient to place that cross section of the locking cam 33i at a perpendicular position to this locking cam 33 bearing surface 32 and tangential position to that of the relative movement of the locking cam 33 and the locking contour 34 has a corresponding circular path, one after a preferably to give rounded apex 52 tapering shape. The latching contour 34 has a latching contour 34 above this bearing surface 31 protruding elevation 53, wherein it It is also useful that the cross-section of this elevation 53ι the perpendicular position to this locking contour 34 bearing surface 31 and tangential position to that of the relative movement of the locking cam 33 and the locking contour 34

1 0988B / 0974

Robert Bosch, GmbH r, nn-zn τ · / tr ™

Stuttgart ^{R 9952 Ll / Km}

speaking circular path has to give a shape tapering towards a preferably rounded apex 54-.

The latching contour 34 also has a latching recess 55 in that of the locking cams 33 through the action of the compression spring 38 then snaps into place when, when the driver 27 is moved out of its starting position, the locking cam 33 is behind the locking contour 3 ^ belonging elevation 53 arrives.

The one made of conductive material, preferably bow-shaped formed contact piece 35 has two diametrically spread contact arms 56,57. So that these contact arms 56,57 can slide unhindered over the mating contacts 40, 41, 42 and 4-3, they are facing these mating contacts 40, 41, 42 and 43 Side provided with a spherical surface 58.

The projection 36 to be inserted into the recess 37 can be form in a simple manner that a U-shaped bent bracket piece 59 is provided between the two contact arms 56,57.

In the preferred example according to the drawing, there are four mating contacts 40,41,42 and 43 on the cover plate 44, the are offset by an angle of 90 ° on an imaginary circular arc. The contact arms 56-i57 can each be bring into contact with two diametrically opposed mating contacts 40, 41 and 42, 43.

A simple construction is obtained if use of rivets as counter-contacts 40, 41,42 and 43, the heads of which extending through the cover plate 44 bolt 60,61,62 and 63 at the same time for fastening AnschluSmittel 64.65 ₅ 66 and 67 for

- 8 109885/0974

■ - 8 -

Jtobert Bosch GmbH _{o QQWT} . _{/ rtn}

Stuttgart ^{R 9952 Ll / km}

Jjeitungen, preferably for fastening. Flat plug connections, are exploited.

Furthermore, the guide surface carrying the latching contour 34 is 51 with two limiting cams 68,69 and the locking cams 53 supporting surface 32 is provided with a stop cam 70. The stop cam 70 strikes when touching between the Contact arms 56,57 and the one pair 40,4 * 1 of the mating contacts 40,41,42 and 43 against the one limiting cam 68 and at Contact between the contact arms 56,57 and the other pair 42,43 of the mating contacts 40,41 42 and 43 against the other limit cams 69 · In addition, the driver 27 is in its starting position when the stop cam 70 against the one limiting cam 68 abuts.

The limiting cams 68,69 and the stopper corners 70 are expediently arranged with the circular path corresponding to the relative movement of the locking cam 33 and the locking contour 3 ^. Included one can position the limiting cam 68 with an inclined surface 71 facing the protrusion 53 belonging to the latching contour 3 ** (FIG. 14) which are used to shape the latching recess 55 is exploited. In this case, the latching recess takes 55 then the locking cam 33 when the stop cam 70 strikes the limiting cam 69.

But it is also possible to choose the design so that a sliding surface 72 (FIG. 15) adjoins the latching recess 55, which leads to the limiting cam 68, that furthermore this sliding surface 72 parallel to the one carrying the latching contour 34 Guide surface 3I runs and preferably the height of the Latching contour 34 belonging elevation 53 has that also the latching recess 55 then receives the latching cam .33 when the

- 9 -109886/0974

Robert Bosch GmbH _{Ώ Qa} , _{o T. / 1Γτη}

Stuttgart ^{R 9932 Ll / km}

Contact arms 56,57 do not touch any of the mating contacts 40, 41,42,43, and finally the stop cam 70 only against the limiting cam 69 abuts after the latching cam 33 has hit the sliding surface 72 against the force of a return spring 73 shown in broken lines in FIG. 6 is.

In the preferred example according to the drawing, the return spring 73 is a leaf spring 74 inserted into the housing 20 in the manner of a sleeve ends 76,77 for engaging each one of two Rückholzapfen 78.79. The return pegs 78,79 of which one of the return pegs 78 sits on the surface 32 carrying the locking cam 33 and the other return peg 79 sits on the guide surface 31 carrying the latching contour 34, preferably have at least approximately teardrop-shaped cross-section.

The attachment of the cover plate 44 to the housing 20 can be done easily and safely in the V / ise that the housing 20 to the the insertion opening 23 facing away from the side by at least two axially extending locking strips 80-81 and through at least two axially extending fixing strips 82,83 is extended, that also the cover plate 44 resting there on the housing edge 84 on its circumference at least four, depending on the cross section one of the four strips 80,81,82,83 has adapted recesses 85,86,87, 88 and that finally in the assembled state of the cover plate 44, the four strips 80, 81, 82, 83 each in one of the four recesses 85,86,87,88 and at the ends of the locking strips 80,81 provided, radially inwardly projecting locking lugs 89.90 reach behind the cover plate 44. The fixing strips 82, 83 have different widths f, f, so that the. Put on of the cover plate 44, only in a predetermined position

- 10 -

109885/0974

Robert Bosch GmbH τ, _no », _{o τ} . _{/ xr}

Stuttgart ^{β 9952 Ll / km}

is possible. In addition, the latching strips 80, 81 have axially extending incisions 91, 92 or v / on both sides. 93 ₅ 94 _; so that these latching strips 80, 81 yield sufficiently resiliently when the cover plate 44 is put on.

The locking contour 34 which Begrenzungsnoo K'en 68,69 and 78,79 can Rückholzapfen to the particular for her face, in the preferred example the case of the guide surface 31, can be molded. The latching contour 34 as well as the delimitation pins 68,69 and possibly also the return pins 78,79 can, however, as shown in FIG and thus engages in corresponding bores 97, 98 which, in the preferred example, are incorporated into the guide surface 31. By applying these measures, it is possible to select the switching steps and their functions by inserting such a component with a profile corresponding to a latching contour and thereby to limit the change in the switch structure to a minimum.

In the area of the insertion opening 23 and the guide bore. 26, the housing 20 has an externally threaded 99 ver-A saw neck 100 carrying a nut 101 and washer 102 for securing the switch.

The described switch is operated in in the following way:

First, the key 25 is inserted into the insertion opening 23 until the limiting collar 50 rests on the locking collar 48. The wing 45 of the locking part 24 located on the key 25 then engages in the slot 46 of the driver -27 and allows this driver 2 ^ from

- 11 -

109885/0974

Robert Bosch GmbH _{D QQ} , _{o T. / Vm}

Stuttgart ^H 9952 Lx / Km

to rotate its starting position in the direction of arrow P (Fig. 1 and 5). Is the driver 27 outside of his Starting position, the key 25 cannot be removed from the switch be removed because the locking collar 48 on the housing 20 then engages in the undercuts 47 of the key 25 * This prevents switching operations from being triggered in an electrical system containing the switch, which can then no longer be easily reversed as a result of losing the key.

The compression spring 38 ensures that in the assembled state of the switch of the flange 50 carrying the locking cam 35 on Driver 27 against the guide surface 3Ί bearing the locking contour 34 ini housing 20 and at the same time the contact piece 35 with its contact arms 56,57 against the mating contacts 40,41,42,45 supporting cover plate 44 is pressed.

It should now be assumed that the profile of the locking contour 54 of FIG. 14 is used. In the starting position of the driver 27 is the locking cam 33 with his Vertex 52 at A, i.e. it lies on the side of the elevation 53 that faces the limiting cam 69 the stop cam 70, the limiting cam and the contact piece 35 with its contact arms 56 * 57 the mating contacts 40,41 « When rotating the driver 27 from the starting position, the locking cam 33 is against the force of the compression spring 38 on the Elevation 55 pushed until finally the apex 52 of the Latching cam 55 reaches the apex 54 of the elevation 55 and the latching cam 53 under the action of the compression spring 38 snaps into the latching recess 55. The latching cam 33 is then located at B, i.e. it is located on the latch on the limit 68 facing side of the elevation 53 · The stop cam 70 touches the limiting cam 69 and the contact piece 35 with its contact arms 56,57 the mating contacts 42,43 ·

109885/0974 - 12 -

Robert Bosch GmbH " _QQ to ύα / ν ™

Stuttgart ^R * ^{9952 Ll / km}

If you want to bring the locking cam 33 back into position A, the driver 27 is in the opposite direction of the To twist arrow P. The locking cam 33 is then pushed against the force of the compression spring 38 onto the elevation 53 again until the apex 52 of the latching cam 33 passes over the apex 54 of the elevation 53 and the latching cam 33 slips into position A under the action of the compression spring 38.

It has been shown that a switch with the just described Effect can be used advantageously in the circuit of an electric motor which is used to drive a lawn mower. In this case, the connection between the mating contacts established by the contact piece 35 in the position A of the locking cam 33 4-0,4-1 for short-circuiting the winding or winding parts in the motor and those in position B of the locking cam 33 connection established by the contact piece 35 between the mating contacts 4-2,4-3 for closing the motor circuit exploited. The short-circuiting of the winding or winding parts in the motor serves to prevent accidents, because that means the engine according to seineiaySu? still very for a short time the cutting blades of the lawnmower are moved and switched on its shaft is difficult to rotate manually.

It should now be assumed that the profile of the latching contour 34 according to FIG. 15 is used. In the starting position of the driver 27, the detent cam 33 is with its apex 52 at A ¹ , that is, it lies on the side of the elevation 53 facing the limiting cam 69.In doing so, the stop cam 70 touches the limiting cam 68 and the contact piece 35 with its contact arms 56 , 57 the mating contacts 40,4-1. When the driver 27 is rotated from the starting position, the locking cam 33 is pushed against the force of the compression spring 38 onto the elevation 53 until finally

- 13 - 109885/0974

Robert Bosch GmbH _Ώ nmo τ ·; / r ™

Stuttgart ^{Ε 9932 Ll / km}

the apex 52 of the latching cam 33 passes over the apex 54 of the elevation 53 and snaps into the latching recess 55 under the action of the compression spring 38. The locking cam 33 is then at B ¹ , ie it lies on the side of the elevation 53 facing the limiting cam 68. Neither the stop cam 70 touches one of the limiting cams 68, 69, nor the contact piece 35 with its contact arms 56, 57 touching one of the mating contacts 40,41,42,43. It is possible here to turn the driver 27 even further in the direction of the arrow P by means of the key 25. If this happens, the locking cam 33 runs onto the sliding surface 72 until the stop cam 70 strikes the limiting cam 69 and the locking cam 33 is at C. In this position G ¹ , the contact piece 35 touches its contact arms 5 &> 57 with the mating contacts 42, 43. However, the locking cam 33 cannot hold itself on the sliding surface without sufficient manual force, because here when the locking cam 33 snaps into the locking recess 55 the return pin 78 located on the flange 30 of the driver 27 engages behind the bent end 76 of the leaf spring 74 and the further rotation of the driver 27 in the direction of the arrow P takes place against a restoring force exerted by this leaf spring 74. Thus, the driver 27 can only maintain its position here when the locking cam 33 is in the position A ¹ or B '. Viii move the locking cam 33 from the position B ¹ back into the position A ¹ , the driver 27 must be rotated in the opposite direction of the arrow P. The locking cam 33 is then pushed again against the force of the compression spring 38 on the elevation 53 until the apex 52 of the locking pin 33 over the apex 54 de3? Elevation 53 arrives and the locking cam 33 snaps ^{into position A 1 under the action of the compression spring 38.}

It has been shown that a switch with the just described Beneficial effect in the electrical system

- 14 10.9885 / 0974

Robert Bosch. GmbH τ, _{nn7O T. / Vm}

■ Stuttgart ^R · ^{9952 Ll / km} ■

a lawnmower can be used, which has an electric starter motor and an ignition device for an internal combustion engine. The connection between the mating contacts 40, 41 to disable the ignition device, for example to short-circuit a spark plug belonging to the ignition device, and that in position C of the detent cam 33 through the contact piece, established by the contact piece 35 in position A ^{1 of the locking cam 33} 35 established connection between the mating contacts 42,43 used to close the circuit belonging to the starter motor. When the locking cam 33 is moved back into the position B ¹ , the circuit of the starter motor is opened again, so that this position B ^{1 represents} the operating position.

109885/0974

Claims (24)

Robert Bosch GmbH _{o QQXO T} · / t ^ Stuttgart ^R ' ^{9952 Ll / km} Expectations (1.L Electric switch that can be operated using a key is characterized by the combination of features a) that a housing (20) is provided which has an insertion opening (23) for a locking part (24) located on the key (25), b) that in the housing (20) the insertion opening (23) is followed by a guide bore (26) in which a driver (27) is mounted by means of a guide pin (28) and can be rotated by the key (25), c) that the guide pin (28) has a recess (29) on its side facing the insertion opening (23) for the positive reception of the shooting part (24) located on the key (25), d) that the driver (27) at its the insertion opening (23) facing away from one side firmly on the guide pin (28) has seated flange (30), e) that opposite that surface (32) of the flange (30) seated on the guide pin (28) jdie the Insertion opening (23) faces, a guide surface (3Ό is located in the housing (20), - 16 109885/0974 Robert Bosch GmbH _{Ό Ο} ωϊο τ-; / ir ™ Stuttgart ^{Κ 9952 Ll / km} f) that of the guide surface (31) and this guide surface ($ 1) opposite surface (32) of the Guide pin (28) seated flange (30) the one Surface has a latching cam (33) and the other surface has a latching contour that interacts with this latching cam (33) (3 ^) bears,. g) that a contact piece (35) is provided that with a Projection (36) into a recess located on the side of the driver (2?) Facing away from the insertion opening (23) (37) is inserted so that it cannot rotate with respect to this driver (27) and by interposing a compression spring (38) is supported resiliently on the bottom (39) of this recess (37), and h) that the contact piece (35) comes into contact with mating contacts (40,4-1,4-2,4-3) by rotating the driver (27) can bring and these mating contacts (40,4-1, 4-2,4-3) are attached to a cover plate (44) which at the same time used to close the housing (20) on the side facing away from the insertion opening (23) finds and is secured there by appropriate shaping of the housing (20). 2. Electrical switch according to claim 1, characterized in that the locking part (24) of the key (25) has a wing - 17 109885/0974 Robert Bosch GmbH _O nn * o τ, · / ν ™ Stuttgart ^R * ^{9952 Ll / km} (45) made of flat material and in the driver (27) as a recess (29) for receiving the wing (45) a slot (46) is incorporated, the width (b ¹ ) of which is the thickness (b) of the wing (45) corresponds, and that further this wing (45) has undercuts (47) for the engagement of a locking collar (48) which protrudes into the guide bore (26) and is firmly seated on the housing (20) and which has interruptions (49) which then in the projection of the slot (46) incorporated in the driver (27) when the driver (27) is in its starting position. 3. Electrical switch according to claim 2, characterized in that the wing (45) belonging to the locking part (24) of the key (25) after the undercut fertilize (47) is followed by a limiting collar (50), which in the inserted state of the The key (25) is seated on the locking collar (48) and its diameter (d) ^{is adapted to the diameter (d 1} ) of a drilled-out section (51) of the insertion opening (23). 4. Electrical switch according to claim 1, characterized V that the locking cam (33) and the locking contour (34) when rotating the driver (27) on an imaginary, concentric to the guide pin (28) - 18 10988570974 Robert Bosch GmbH " _QQ " _{T. / v} - _m Stuttgart ^R * 9932 Ια / km Circular path are movable relative to each other. 5. Electrical switch according to claim 1 and 4, characterized in that that that cross section of the locking cam (33) »the perpendicular position to this locking cam (33) bearing surface and tangential position to the relative movement of the locking cam (33) and the locking contour (34-) has a corresponding circular path, a shape tapering towards a preferably rounded apex (52) owns. 6. Electrical switch according to claim 4, characterized in that the latching contour (34) has one over which this latching contour (34) supporting surface has protruding elevation (53) and 75 ~ ") Ä the branch contour ~ "(34) bearing surface and tangential Location of the relative movement of the locking cam (33) and the circular path corresponding to the locking contour (34), a preferably rounded apex (5 ^) has a tapering shape. 7. Electrical switch according to claim 4 to 6, characterized in that that the locking contour (3 ^) has a locking recess (55) on \ tfeist into which the locking cam (33) by the action the compression spring (38) then snaps into place when, when the driver (27) moves out of its starting position, the locking - 19 109885/0974 Bobert Bosch GmbH " _QQ , _{O τ} · _{/ Vm} Stuttgart ^{Ε 9952 Ll / km} . cam (33) behind the elevation belonging to the east contour (3 ^) (53) arrives. 8. Electrical switch according to claim 1, characterized in that that the preferably bow-shaped contact piece (35) has two diametrically spread contact arms (56, 57). 9. Electrical switch according to claim 1 and 8, characterized in that that the contact arms (56,57) have a convex side on their side facing the mating contacts (4-0,41,4-2,4-3) Area (58). 10. Electrical switch according to claim 1 and 8, characterized in that that the contact piece (35) between the two contact arms (56,57) is a U-shaped bent bracket piece (59) having the recess located in the side of the driver (27) facing away from the insertion opening (23) (37) insertable projection (36) forms. 11. Electrical switch according to claim 1, characterized in that that there are preferably four mating contacts (40, 4-1,4-2,4-3) on the cover plate (4Λ) on a imaginary circular arc at an angle preferably of 90 are offset, and that the contact arms (56,57) each - 20 1.09885 / 0974 Robert Bosch GmbH _Ώ ^ ₀₃₀ , τα / ν Stuttgart ^Ε · 9952 Ια / Κ * can be brought into contact with two diametrically opposed mating contacts (40, 41 or 42, 43). 12. Electrical switch according to claim 1 and 11, characterized in that that the mating contacts (40,41,42,4J) are formed by the heads of rivets whose bolts (60,61,62,63) protrude through the cover plate (44) and are used to attach connecting means (64.65 »66.67) for lines. 13 · Electrical switch according to claim 12, characterized in that that as connection means (64,65,66,67) flat plug connections are used. 14. Electrical switch according to claim 1,8 and 11, characterized in that the surface carrying the latching contour (34) provided with two limiting cams (68,69) and the surface carrying the locking cams (33) with a stop cam (70) is, wherein the stop cam (70) on contact between the contact arms (56,57) and a pair (40,41) the mating contacts (40,41,42,43) against the one limiting cam (68) and upon contact between the contact arms (56,57) and another pair (42,43) of the mating contacts (40,41,42,43) pushes against the other limiting cam (69), - 21 109885/0974 Robert Bosch GmbH _D «nzo ta / v ™ Stuttgart ^{R 9952 Ll / Km} 15. Electrical switch according to claim 4 and 14, characterized characterized in that the stop cam (70) and the limiting cam (68,69) on the relative movement of the east cam (33) and the latching contour (34) corresponding Circular path. 16. Electrical switch according to claim 1 and 14, characterized characterized in that the stop cam (70) then against the a limiting cam (68) abuts when the driver (27) is in its starting position. 17. Electrical switch according to claim 1, 6, 7 and 14 to 16, characterized in that that limiting cam (68) against which the stop cam (70) abuts in the starting position of the driver (27) is one of the locking contour (34) belonging elevation (53) facing ^{inclined surface (68 1} ), which is used to shape the locking recess (55), this locking recess (55) then receiving the locking cam (33) when the stop cam (70) against the other limiting cam (69 ) comes across. 18. Electrical switch according to claim 1,6,7 and 14 to 16, characterized in that the latching recess - (55) a sliding surface (72) is connected, which leads to that limiting cam (68) against which the stop cam -22 - 109886/0974 Robert Bosch GmbH _{Ό Qo} , _{o T. / Trm} Stuttgart ^R * ^{9952 Ll / Em} (70) in the starting position of the driver (27) abuts that this sliding surface (72) also runs parallel to the surface carrying the latching contour (34) and preferably has the height (h) of the elevation (53) belonging to the latching contour (34) that also the latching recess (55) then receives the latching cam (33) when the contact arms (56> 57) do not touch any of the mating contacts (40,41,42 * 43) and that • finally the stop cam (70) only against the other limiting cam (69) abuts after the locking cam (33) has run against the force of a return spring (73) to oil ^e sliding surface (72). 19. Electrical switch according to claim 1 and 18, characterized in that as a return spring (73) in the manner of a sleeve in the housing (20) inserted leaf spring (74) is used, which is preloaded in an angular range of about 270 ° on the Housing inner wall rests and hook-shaped inwardly bent ends (7 €>-> 77) for the engagement each has one of two return pegs (78,79), with one return peg (78) on the surface carrying the locking cams (33) and the other Rückholzapfen (79) sits on the surface bearing the latching contour (34). 20. Electrical switch according to claim 19, characterized in that that the return cones (78,79) have at least approximately teardrop-shaped cross-section. px 109885/0974 Robert Bosch GmbH τ, Q ₀₂₀ τ ·; / ir ™ Stuttgart ^H - 9932 Ια / km 21. Electrical switch according to claim. 1,4,5,6,7,14 uad 19, characterized in that the guide surface (31) the Latching contour (34) and the surface (32) opposite the guide surface (31) of the surface (32) seated on the guide pin (28) Flange (30) carries the locking cam (33). 22. Electrical switch according to claim 1 and 14, characterized in that that the latching contour (3 * 0 as well as the limiting cams (68,69) and, if necessary, also the return pin (78,79) are components of an independent component that is located on the surface provided for the latching contour (3 * 0 interchangeably placed and secured there by a form-fitting connection. 23. Electrical switch according to claim 1, characterized in that that the housing (20) on the side facing away from the insertion opening (23) by at least two axially extending locking strips (80,81) and is extended by at least two axially extending fixing strips (82,83) and that the cover plate resting there on the edge of the housing (84) (44) at least four on its circumference, depending on the cross-section one of these strips (80,81,82,83) has adapted recesses (85,86,87,88), wherein in the assembled state of the cover plate (44), the four strips (80, 81, 82, 83) each lie in one of the four recesses (85, 86, 87, 88) - 24 109885/09 7 4 Robert Bosch GmbH _{D nnzo T.} Stuttgart R. 9952 Li and at the ends of the locking strips (80, 81) provided, radially inwardly projecting locking lugs (89 »90) behind the cover plate (44) grab. 24. Electrical switch according to claim 23, characterized in that that the fixing strips (82, 83) have different widths (f or f '). 25 · Electrical switch according to claim 23, characterized in, that on both sides of each of these locking strips (80, 81) axially extending incisions (91, 92 or 93,94) are incorporated into the housing (20). 109885/0974