EP0948007B1 - Electrical switch - Google Patents

Description

The invention relates to an electrical switch, in particular kick-down switch for a motor vehicle, with a within a housing via a pawl automatically adjustable length, spring-loaded control applied to a contact elements receiving switching element, wherein the pawl teeth a Justierwinkelstellung, in a part of Pawl toothing assigned at least one space and the pawl teeth is linearly displaced into each other, and has a working position in which the pawl teeth are linearly supported each other.

From DE 32 30 414 C2, a plunger switch with a self-adjustable length within a housing plunger is known. Here, a cooperating pawl toothing is arranged in the interior of the plunger and on the outside of a carriage. However, this pawl teeth can not be blocked after the length adjustment, whereby a further unintended change in length can be performed. Furthermore, the entire plunger in which the pawl toothing is not made very stable, so that when laterally acting forces the switch can be easily damaged and thus no electrical function is more achieved. Since the entire pawl toothing is arranged within the plunger, there is no possibility to secure a length adjustment performed. The pestle leaves adjust relatively easily, which again and again a length adjustment is required. Also, the holding force of the pawl teeth is relatively weak, so that adjusts the pawl new in length before overcoming a desired pressure point outside the pawl teeth.

Furthermore, DE 196 03 135 C1, which forms the closest prior art, discloses an electrical switch with a spring-loaded operating element which is automatically adjustable in length within a housing via a pawl toothing and which acts on a contact element receiving a contact element. The pawl toothing has a Justierwinkelstellung, in which a part of the pawl teeth assigned at least one space and the pawl teeth are linearly displaced into each other, and a working position in which the pawl teeth is linearly supported each other

The invention has for its object to provide an electrical switch of the type mentioned, in which a length adjustment of the pawl teeth can be secured and which can be actuated only after overcoming a predetermined force in its electrical function.

This object is achieved in that the switching element cooperates with a housing-fixed, the Justierwinkelstellung associated stop and has a spring-loaded, cooperating with a housing-fixed shift gate pressure piece.

When using the switch according to the invention, the length adjustment of the pawl teeth can be done very easily in the Justierwinkelstellung. The part of the pawl teeth associated clearance allows the resilient retreat a part of the pawl toothing, which automatically brings back into engagement with the counterpart, so as to remain in the adjustment position, which is reached when the contact element meets the stop. Also, the implementation of a new length adjustment is very easy. For this purpose, the control can be manually pulled back from the switch housing, resulting in a new position of the control element to the housing of the switch by means of the pawl teeth. If the length adjustment is to be secured, a part of the pawl toothing is moved out of the area of the free space by the rotation of the operating element. The resilient part of the pawl teeth is blocked and can no longer spring out of its counterpart, whereby a positive engagement of the pawl teeth is ensured. Only after overcoming the tactile point caused by the spring-loaded pressure piece and the shift gate is the electric function switched, as is required in a built-in motor vehicle kick-down switch.

According to an advantageous embodiment of the invention, the pawl toothing consists of at least one spring latch, which has at least one spring tooth, and an associated latch which has a plurality of linearly successively arranged in series latching teeth, wherein the spring tooth and the latching teeth facing each other are engaged. As a result, the length adjustment is ensured in a large area, since the spring tooth of the spring latch several consecutive ratchet teeth are available. An adaptation to the forces acting by the arrangement of a plurality of spring teeth is possible, which withstand the acting shear forces in the Justierwinkelstellung the working position.

In order to avoid accidental removal of the control element of the switching element during the length adjustment, the spring latch at its the spring claw foot end facing a sawtooth spring tooth whose vertical tooth flank forms the conclusion of the teeth of the spring latch wherein the latch at its free end with a with vertical tooth flank corresponding stop surface is provided. The interaction of the vertical tooth flank of the spring latch and the stop surface of the latch results in this area an increased displacement resistance, which is tactile to detect when pulling the control element and can be overcome only relatively difficult.

A reduction in the number of parts and thus a cost reduction is achieved according to an advantageous embodiment of the invention in that the spring latch on the control element and the latch is attached to the switching element. Farther By reducing the number of parts, a reduction of the expected manufacturing tolerances is achieved, whereby the electrical switch operates more accurately.

According to an advantageous embodiment, the spring latch of the control element in the Justierwinkelstellung in a housing-fixed insertion opening can be inserted, the shape of a circular ring portion having a slightly larger clearance than the thickness of the spring latch foot and in the Justierwinkelstellung the outwardly aligned, slightly wider free space than the width of the Spring latch has, with one of the spring latch facing support wall of the free space extends over the entire adjustment length. Thus, no additional parts are required to achieve the adjustment and working position.

A deformation of the pawl teeth should be avoided in the length adjustment. Furthermore, both the length adjustment and the recalibration should be easy to accomplish by the effort forth, without damaging moldings. Conveniently, therefore, the radial height of the free space is at least as large as the thickness of the spring latch foot plus the height of the spring teeth.

In a further advantageous embodiment of the invention, the locking teeth of the latch are coaxial with the spring latch in a radial region which is at least as long as the length of the annular insertion opening. It is therefore possible to turn the control element with the spring latch around the circular section. The spring teeth of the spring latch slide in the locking teeth of the latch along, and in this position, the spring teeth opposite wall of the spring latch is located on the support wall of the insertion on, whereby a further undesired adjustment of the switch is avoided.

The working position of the electric switch should be ensured after the adjustment of the length of the control by a secure positioning, and the switch is to assume its adjusted initial position after the operation again. Conveniently, therefore, the shift gate has a radial extent from the Justierwinkelstellung to the working position, wherein between the Justierwinkelstellung and the working position a projection and further provided in the working position a linearly aligned pressure gate. The projection prevents the automatic as well as unconscious return to the Justierwinkelstellung and the pressure gate, the zero position of the switch is set.

According to an advantageous embodiment, the pressure gate on a pressure point from which extends a slotted slope, the course is designed so that it is always closer to the switch axis with the distance from the control element. The pressure point provides the tactile feedback when overcoming the switching point, and the formation of the slanted slope supported under the effect of ferderbelasteten Pressure piece the automatic resetting of the electrical switch.

To ensure the safe electrical function, a resilient contact bridge is also preferably arranged on the switching element, which bridges the housing-fixed contact terminals after actuation of the operating element. The springing can be adapted to the gewüschten requirements, whereby a safe switching without affecting the shift feeling is made possible.

The adjustment should be easy to carry out without further tools or measuring means, the contact elements may not be damaged by the actuating forces. For this purpose, the total displacement of the accelerator pedal is suitable for the kick-down switch, taking into account all manufacturing tolerances on the motor vehicle. This is achieved according to a further embodiment, characterized in that the stop is arranged so that the contact bridge of the actuated by the operating element switching element is not yet in operative connection with the housing-fixed contact terminals. As soon as the adjustment or adjustment is reached until the stop, the rotation of the operating element takes place in the working position. The pressure piece overcomes the projection, and the switch is adjusted under the automatic consideration of all manufacturing tolerances in the optimum position. Since the contact elements are not touching, it can not damage the same during rotation.

Conveniently spring-loaded switching member is released when turning the control element from the Justierwinkelstellung in the working position of the stop, causing the contact bridge comes into contact with the contact terminals. Thus, simultaneously with the rotation of the control element, the electrical Activation of the switch with the greatest possible protection against damage.

In an alternative embodiment of the invention, the stop is the inside of the bottom of the housing on which the switching element comes by the application of the operating element to the plant, the contact bridge is in operative connection with the contact terminals, and the switching element after the rotation of the operating element of the Justierwinkelstellung in the working position removed under the action of a return spring from the housing bottom and the contact connection is interrupted. This embodiment allows a much more stable and powerful structure of the electrical switch. In particular, no rotatable switching element is required, whereby the internal structure of the switch is much more robust and cheaper.

Through the use of sliding contacts can be dispensed with an expensive use of precious metals, as required for touch contacts. Therefore, in the alternative embodiment, the contact bridge preferably a laterally attached to the switching element contact spring, which slides on actuation of the control element on a housing wall and aufschiebt on the contact terminals. When the switch is actuated, self-cleaning of the sliding contacts and thus increased life of the switch occur.

To make the switch more robust, so that lateral forces are better tolerated, there is an advantageous development of the alternative embodiment, the control of a housing enclosing, closed at the end with a lid sleeve with a concentric pin, wherein the pin is longer than the sleeve. Due to the long coverage of the items is a large area for the Supporting the shear forces available, and the switch is much more stable in construction. In order to reinforce this effect still expediently the pin rotatably in a mounted on the switching element recording, the recording extends to the inside of the lid.

Each switch must be installed in the same position so that the supply line has an optimum course and a short length. To ensure this is preferably attached to the housing, a fastening device with which the switch is unmistakably used on a console and secured with a bolt.

Fig. 1

einen Schnitt durch einen erfindungsgemäßen, unbetätigten Schalter in der justierten Stellung,

Fig. 2

einen Schnitt gemäß Fig. 1 vor dem Justieren des Schalters,

Fig. 3

einen Schnitt durch den Schalter nach Fig. 1, entlang der Linie III-III,

Fig. 4

einen Schnitt gemäß Fig. 3 im betätigten Zustand des Schalters,

Fig. 5

einen Teilschnitt gemäß Fig. 7 in Pfeilrichtung V, in justierter nicht gesicherter Position,

Fig. 6

einen Teilschnitt gemäß Fig. 8 in Pfeilrichtung VI in justierter und gesicherter Position,

Fig. 7

einen Schnitt durch Fig. 1 entlang der Linie VII-VII in ungesicherter Position,

Fig. 8

einen Schnitt gemäß Fig. 7 in gesicherter Position,

Fig. 9

einen Schnitt durch Fig. 1 entlang der Linie IX-IX, in gesicherter Position,

Fig. 10

eine Ansicht auf den Schalter gemäß Fig. 1 in Pfeilrichtung X in der Einsetzposition in ein Bodenblech,

Fig. 11

eine Ansicht auf den Schalter gemäß Fig. 10 in der veriegelten Einsetzposition,

Fig. 12

einen Schnitt durch einen alternativen erfindungsgemäßen Schalter analog zu Fig. 1,

Fig. 13

einen Schnitt durch den Schalter gemäß Fig. 1 entlang der Linie XIII-XIII,

Fig. 14

einen Schnitt durch den Schalter gemäß Fig. 12, entlang der Linie XIV-XIV,

Fig. 15

eine Ansicht auf den Schalter gemäß Fig. 12 in Pfeilrichtung XV,

Fig. 16

eine Teilansicht auf den Schalter gemäß Fig. 15 in Pfeilrichtung XVI,

Fig. 17

einen Teilschnitt des Schalters gemäß Fig. 13 im unbetätigten Zustand, und

Fig. 18

eine vergrößerte Darstellung der Einzelheit XVIII der Fig 17.

The idea underlying the invention will be explained in more detail in the following description with reference to two embodiments, which are illustrated in the drawing. Show it:

Fig. 1

a section through an inventive, unactuated switch in the adjusted position,

Fig. 2

a section of Figure 1 before adjusting the switch,

Fig. 3

a section through the switch of FIG. 1, taken along the line III-III,

Fig. 4

a section of FIG. 3 in the actuated state of the switch,

Fig. 5

a partial section of FIG. 7 in the direction of arrow V, in adjusted non-secured position,

Fig. 6

a partial section of FIG. 8 in the direction of arrow VI in adjusted and secured position,

Fig. 7

a section through Figure 1 along the line VII-VII in unsecured position,

Fig. 8

a section of FIG. 7 in a secured position,

Fig. 9

a section through Fig. 1 along the line IX-IX, in a secured position,

Fig. 10

a view of the switch of FIG. 1 in the direction of arrow X in the insertion position in a floor panel,

Fig. 11

a view of the switch of FIG. 10 in the sealed insertion position,

Fig. 12

a section through an alternative switch according to the invention analogous to FIG. 1,

Fig. 13

a section through the switch of FIG. 1 along the line XIII-XIII,

Fig. 14

a section through the switch of FIG. 12, taken along the line XIV-XIV,

Fig. 15

a view of the switch of FIG. 12 in the direction of arrow XV,

Fig. 16

a partial view of the switch of FIG. 15 in the direction of arrow XVI,

Fig. 17

a partial section of the switch of FIG. 13 in the unactuated state, and

Fig. 18

an enlarged view of the detail XVIII of FIG. 17

1 to 11 represent a Ausgestaltungsart of the electrical switch according to the invention. The housing 1 is made in two parts and consists of an upper housing part 2 and a lower housing part 3, the connection is made via clips, not shown. On the lower housing part 3, a plug collar 4 is formed, in the two contact terminals 5 protected einliegen. The contact terminals 5 are embedded in the housing lower part 3 with plastic encapsulated and have an angled portion 6 within the encapsulation. Each end of the bend 6 is exposed in the interior of the housing lower part 3 and carries there a Kontaktniet 7. At the lower housing part 3 is still a rotatable mounting device 8 with a key width 9, to secure the switch in a console 10. The fastening device 8 is designed so that the switch is unmistakably inserted and secured in the console 10. In this case, the fastening device 8 is rotated with a corresponding open-end wrench over the key width 9 to the lower housing part 3. On the lower housing part 3 to a circumferential bead 11 is injected, which rests in a corresponding groove on the fastening device 8 and allows the rotation. In this embodiment, the plug collar 4 always has a predetermined position and is not rotated. On the fastening device 8, a latch 12 is provided with which the switch is secured in the console 10.

Figs. 1 and 3 illustrate the switch in the adjusted, non-actuated state, in which a contact bridge 13 is not in contact with the contact rivets 7 of the contact terminals 5. Fig. 2 shows the switch rotated by 90 °, wherein a control element 14 is not yet adjusted to the housing 1.

To adjust the control element 14 is inserted with its four spring latches 15 in two existing in a top wall 16 of the housing 1 housing-fixed insertion openings 17, and indeed where free spaces 18 are present. This arrangement represents the adjustment angle position 31. The free spaces 18 extend over the entire length of the housing upper part 2. For adjustment, the switch is already mounted with its fastening device 8 on the console 10, which is associated with an accelerator pedal (not shown). The insertion of the control element 14 takes place with the accelerator pedal. In this case, a switching member 19 is moved over the operating element 14 in the direction of the lower housing part 3 against the force of a return spring 20 until it comes to a stop 21 to the plant. Upon further actuation of the accelerator pedal, the spring teeth 22 of the spring claws 15 slide over the locking teeth 23 of the latching pawls 24 present on the switching element 19, wherein the spring latches 15 are pressed into the respective free space 18. As soon as a spring tooth 22 comes to rest between two latching teeth 23, the spring latch 15 springs into the latching pawl 24. In this arrangement, the spring pawls 15 with the spring teeth 23 and the pawls 24 with the ratchet teeth 23, the pawl teeth 25 represents. After completion of the accelerator pedal a corresponding position, in which there is a latched arrangement. In this position, the pressure member 26 held in the switching member 19 is located in a ball guide 27 of the upper housing part 2. The pressure piece 26, which is inserted in a switching member bore 30, consists of two balls 28 and an intermediate compression spring 29th

The switch must now be transferred to the working position 33 (see Fig. 8). This is done by turning the control element 14 counterclockwise (see Fig. 7). The balls 28 of the pressure piece 26 when sliding over the projection 32 against the force of the compression spring 29 in the Schaltgliedbohrung 30 pressed. As soon as the balls 28 on the projection 32 are over, they come to lie in a pressure gate 34, which are in the working position 33. At the same time fastened to the control element 14 spring claws 15 are rotated with their Federklinkenfuß 35 in the annular insertion openings 17. The insertion openings 17 have in the rotated area no clearance 18 more and there have only a smaller clearer width than the thickness of the spring latch foot 35. From this clear width starting planting a support wall 36 on which the outside of the spring latch 15 is supported and prevents that disengage the spring teeth 22 from the engagement of the locking teeth 23. Over the entire area of the annular insertion openings 17, the latching teeth 23 of the latching pawls 24 extend, whereby a sliding of the spring teeth 22 between the latching teeth 23 is made possible. After the presence of this situation, the control element 14 is now adjusted and secured at this altitude.

When turning the control element 14, the switching member 19 is rotated. It comes from the stopper 21 free and can be immersed in further operation of the control element 14 in the interior of the lower housing part 3. The stop 21 is located only on a small portion of the lower housing part 3, namely arranged diametrically. Corresponding recesses are located in the switching member 19 (not shown) in which the stops 21 dip.

The content in the switching member 19 Druckruck 26 26 cooperate with a switching gate 58, which is composed of a respective ball guide 27, a projection 32, a pressure gate 34 and the backdrop bevel 38.

The switch thus has its zero position and is ready for the operation. When the accelerator pedal is actuated, it passes through a large free area and comes into contact with the operating element 14 only shortly before the end stop. Now, if the switch is to be actuated, a predetermined high force is required by the balls 28 of the pressure member 26 against the force of the compression spring 29 recede, and the balls 28 overcome the pressure point 37 of the pressure gate 34 and thus accrue to the backdrop slope 38. There, the balls 28 are still on, and the operating element 14 to open the gate slope 38 causes a resultant restoring force of the control element 14. This restoring force is reinforced by the additional return spring 20, whereby the switch automatically resets after completion of the operation.

On the switching member 19, which includes all the same with him moving other, not described items is located, the contact terminals 5 opposite, by a compression spring 39 clamped contact bridge 13. In this area, the switching member 19 has a receiving bore 40 in which Compression spring 39 rests, free sprays 41 for the contact bridge holder 42, a cross-sectionally U-shaped driving groove 43, in which the base 44 of the contact bridge 13 rests, and two, symmetrically arranged to the receiving bore 40, provided with chamfered holes 46 through which the spring tabs 47 provided legs 45 of the contact bridge 13 are used. In the unactuated state, the spring tabs 47 are under the action of the compression spring 39 on the wall of the free spray 41 (Figure 3). In the actuated state, the contact points 48 of the contact bridge 13 are at the contact rivets 7 of the contact terminals 5 under the force of the compression spring 29, and the electrical connection is made. The legs 45 of the contact bridge 13 dive into the free sprays 41 and the spring tabs 47 are no longer on the wall of the free sprays 41 on.

In Figs. 12 to 16, an alternative embodiment of the switch is shown. As far as the details and functions are the same, they will not be described here. To make the switch more robust, so that greater lateral forces can act harmless, the switching element 19 consists only of a molded part. The return spring 20 is housed in a dome 48 in the region of the fastening device 8, whereby the area of the switching element 19 zugeordnete the operating element 14 is made substantially more massive. The stop 21 here is the inside 49 of the bottom 59 of the housing 1. The contact bridge 13 is formed as a stamped part contact spring, which is clipped on the side of the switching member 19. The injected in the lower housing part 3 contact terminals 5 have a simple bend 50, you are exposed and comes when operating with the contact bridge 13 in operative connection. By laying the contact bridge 13 to the side of the switching element 19, a deeper immersion of the robust switching element 19 in the housing 1 is possible, whereby the design of the switch is even more stable.

The operating element 14 comprises a one-piece, robust sleeve 51, which surrounds the housing 1. The sleeve 51 surrounds both the upper housing part 2 and the lower housing part 3, wherein in one area a ventilation opening 52 is provided. Furthermore, the sleeve 51 is closed with a lid 53 which is formed spherical on its outer side. The cover 53 has a concentric, cross-sectionally cross-shaped pin 54 which is longer than the height of the sleeve 51. In the switching member 19 is a receptacle 55 is inserted, which is present in a reaching to the inside of the lid 53 tower 56, which also still Has material saving chambers.

The receptacle 55 is cross-shaped in cross section, whereby the switching member 19 is rotated during rotation of the operating element 14 of the Justierwinkelstellung 31 in the working position 33. The long overlap between the tower 56 and the pin 54 provides a more robust and stable construction of the electrical switch. In the lower housing part 3, a sufficiently large space for the immersion of the switching element 19 with its contact bridge 13 is present, which is brought into the correct position to the contact terminals 5 only after turning the control element 14.

The fastening device 8 is designed in one piece with the lower housing part 3. After the unmistakable plugging into a console 10, the entire switch is rotated and locked with the latch 12. Although the plug collar 4 is rotated with the contact terminals 5, but a reduction in the number of parts and thus the manufacturing cost and further stiffening of the housing 1 result Has. Alternatively, the fastening device 8 can also be designed as a bayonet lock.

In the embodiment of the spring latch 15 shown in FIGS. 17 and 18, this has a sawtooth-shaped spring tooth 60 on its end facing the spring latching foot 35, the vertical tooth flank 61 of which abuts a stop surface 62 at the free end of the latching pawl 24. This position is achieved in the extended end position of the operating element 14 during the adjustment of the switch. The interaction of the vertical tooth flank 61 of the spring tooth 60 with the abutment surface 62 counteracts accidental removal of the operating element 14 of the switching member 19, since there is an increased resistance to displacement compared to the sliding resistance, the sliding of the oblique tooth flanks 63 of the spring teeth 22 on the ratchet teeth 23 is present. Overcoming the increased displacement resistance is tactile perceptible during the adjustment of the switch and is therefore not accidentally completed.

Claims (17)

1. Electrical switch, in particular kick-down switch for a motor vehicle, with a spring-loaded operating element (14), automatically adjustable in length inside a housing (1) via ratchet teeth (25), which impacts a switching member (19) accommodating contact elements, wherein the ratchet teeth (25) have an adjusting angle setting (31), in which at least one space (18) is allocated to part of the ratchet teeth (25) and the ratchet teeth (25) can be pushed linearly into one another, and an operating position (33), in which the ratchet teeth (25) are held linearly inside one another, characterised in that the switching member (19) interacts with a limit stop (21), fixed to the housing and allocated to the adjusting angle position (31) and has a spring-loaded thrust piece (26) interacting with a selector gate (58) fixed to the housing.
2. Electrical switch according to claim 1, characterised in that the ratchet teeth (25) consist of at least one spring pawl (15), which has at least one spring tooth (22), and an associated locking pawl (24), which has several locking teeth (23), arranged linearly in succession in a row, the spring tooth (22) and the locking teeth (23) being in engagement facing one another.
3. Electrical switch according to claim 2, characterised in that the spring pawl (15) has on its end facing the spring pawl foot (35) a saw-tooth-shaped spring tooth (60), the perpendicular tooth flank (61) of which forms the termination of the teeth of the spring pawl (15), wherein the locking pawl (24) is provided on its open end with a limit stop face (62) corresponding to the perpendicular tooth flank (61).
4. Electrical switch according to one of claims 2 or 3,
   characterised in that the spring pawl (15) is fixed to the operating element (14) and the locking pawl (24) to the switching member (19).
5. Electrical switch according to one of claims 2 to 4,
   characterised in that in the adjusting angle position (31) the spring pawl (15) of the operating element (14) can be pushed into an insertion orifice (17) fixed to the housing, which has the shape of a circular ring section with a minimally larger clearance than the thickness of the spring pawl foot (35) and in the adjusting angle position (31) comprises the space (18) aligned outwards and minimally wider than the width of the spring pawl (15), wherein a supporting wall (36) of the space (18) facing the spring pawl (15) extends over the entire adjusting length.
6. Electrical switch according to claim 5, characterised in that the radial height of the space (18) is at least as large as the thickness of the spring pawl foot (35) plus the height of the spring teeth (22).
7. Electrical switch according to one of claims 2 to 6,
   characterised in that the locking teeth (23) of the locking pawl (24) are located coaxially to the spring pawl (15) in a radial area which is at least as large as the length of the circular-ring-shaped insertion orifice (17).
8. Electrical switch according to claim 1, characterised in that the selector gate (58) has a radial extension from the adjusting angle position (31) to the operating position (33), wherein a projection (32) is provided between the adjusting angle position (31) and the operating position (33) and a linearly aligned pressure gate (34) in the operating position (33).
9. Electrical switch according to claim 8, characterised in that the pressure gate (34) has a pressure point (37) from which a gate diagonal (38) extends, the course of which is constructed in such a way that it is increasingly closer to the switch axis as it moves away from the operating element (14).
10. Electrical switch according to one of claims 1 to 9, characterised in that arranged on the switching member (19) is a sprung contact bridge (13), which bridges contact terminals (5) fixed to the housing after the operating element (14) has been actuated.
11. Electrical switch according to one of claims 1 to 10,
    characterised in that the limit stop (21) is arranged in such a way that the contact bridge (13) of the switching member (19) actuated by the operating element (14) is not yet in active connection with the contact terminals (5) fixed to the housing.
12. Electrical switch according to claim 11, characterised in that the spring-loaded switching member (19) is released from the limit stop (21) when the operating element (14) is rotated from the adjusting angle position (31) into the operating position (33), whereby the contact bridge (13) comes into connection with the contact terminals (5).
13. Electrical switch according to one of claims 1 to 10, characterised in that the limit stop (21) is the inner face 49 of the floor (59) of the housing (1) on which the switching member (19) comes to rest by the impacting of the operating element (14), wherein the contact bridge (13) is in active connection with the contact terminals (5) and after the operating element has been rotated from the adjusting angle position (31) into the operating position (33) the switching member (19) moves away from the housing floor (59) under the action of a readjusting spring (20) and the contact connection is interrupted.
14. Electrical switch according to claim 13, characterised in that the contact bridge (13) is a contact spring fixed laterally to the switching member (19), which on actuation of the operating element (14) slides along a housing wall and is pushed on to the contact terminals.
15. Electrical switch according to one of claims 1 to 10, 13 and 14, characterised in that the operating element (14) consists of a sleeve (51), surrounding the housing (1) and closed at the end by a cover (53), with a concentric journal (54), the journal (54) being longer than the sleeve (51).
16. Electrical switch according to one of claims 1 to 10, 13 to 15, characterised in that the journal (54) is inserted non-rotatably into a retainer (55) mounted on the switching member (19), wherein the retainer (55) reaches as far as the inside of the cover (53).
17. Electrical switch according to one of claims 1 to 16,
    characterised in that mounted on the housing (1) is a fastening device (8) with which the switch is inserted non-interchangeably on a control panel (10) and secured by a bolt (12).

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