EP1764813B1 - Electrical switch - Google Patents

Abstract

Electrical switch comprises a common contact body (21), an elastically deformable contact sensor (25), which is in the form of leaf spring, electrically connected to common contact body and an actuator. A first selective contact body (22) and second selective contact body (23) have contact surface (23b) connected with contact sensor. The contact sensor engages the contact surface of selective contact body. The contact sensor under the influence of its pretension is in contact with first selective contact body by activated actuator and with the second selective body in switch operative contact. Contact sensor is provided for switching operative contact of the contact surfaces, present on the selective contact bodies, with contact fingers (26) which protrude from the edge of the leaf spring. The contact fingers geometrically form a common contact surface together with the contact surface of both selective contact body in which the contact finger slidingly engage the contact surface of the selective contact body with the deformation of the contact sensors.

Description

The invention relates to an electrical switch in which a common contact body and a first and a second select contact body are provided in a housing. A movable contactor, which can be moved from outside the housing against spring force, establishes the electrically conductive connection between the common contact body and either the first or the second selection contact body. A switch of this kind is for example from the DE 44 20 665 B4 known.

In this known switch, the contact surfaces of the first and second selective contact body are embedded in a wall of the switch housing. The contactor is a slider which is provided with an actuator protruding from the housing. In the slider, a contact plate is embedded, which has a protruding contact finger. By a compression spring in the form of a helical spring, the contactor is pressed into an end position. At the same time, the helical spring produces the electrically conductive connection between the contact finger and the common contact body embedded in the housing. In the first end position effected by the helical spring, the contact finger located on the contactor bears against the contact surface of the first selection contact body. At a pressure on the actuator, the contactor moves against the restoring force of the coil spring in its second end position, in which the contact finger bears against the contact surface of the second selection contact body.

Switches of this type are implemented in the miniature or subminiature range and serve to switching tasks in which a normally closed electrical contact is temporarily interrupted by mechanical action on the actuator, the conductive connection is made on a normally closed second contact.

Switches of this type are particularly suitable for position detection tasks in automatic manufacturing operations. However, typical application areas can also be locking systems in the bodywork and interior areas of a motor vehicle as well as various position queries in household appliances or other mechanisms.

By in the known switch according to the DE 44 20 665 B4 the contact finger of the contactor sliding from the contact of the first contact surface on the contact of the second contact surface, it is achieved that the switching behavior can be selectively influenced. The influencing factors are mainly the sliding path of the contact finger, the size of the contact surfaces and their distance from each other. These influencing variables can be optimally matched to one another. Thus, for example, it is possible to maintain a strict separation between the two switching positions, or to allow an intermediate position in which both contact surfaces are in conductive contact with the contact finger. Further, in a switch of this type, the switching operation is reliably performed at a desired timing regardless of whether the operation is fast or slow from the outside.

A disadvantage of the known switch according to the DE 44 20 665 B4 in that the current-conducting connection, starting from the fixed common contact body via the helical spring and the contact plate to the contact finger, requires a plurality of components and in addition also the sliding body of the contactor for holding or positioning these components. Furthermore, the plate-shaped body of the contactor with a narrow side must be performed very accurately along the flat housing wall, in which the contact surfaces of the first and second optional contact body are embedded. The contactor must not tilt or pinch. This requires a high-precision production of the individual parts and a complex assembly, if a reliable function over long periods should be guaranteed.

From the EP 1 533 823 A1 goes out another switch, in which a common contact body is selectively connected by a contactor with a first or a second election contact body. The contactor is here an elastically deformable leaf spring, which receives a bias in the longitudinal direction by a tongue formed from her and thereby strives to assume a warped form. The blade-shaped contactor engages with the entire width of its free end in the space of correspondingly shaped areas of the selector contact body. The surfaces of these areas are parallel to the surface of the sheet-shaped contactor. About patch additional small contact body, which are located at the free end of the blade-shaped contactor and the said areas of the first and second selective contact body, the electrically conductive connection between the contactor and each one of the two selective contact body can be made. The surface of the sheet-shaped contactor and the surfaces of said areas on the selector contactors are parallel to each other. The switching state is changed by an actuator acting on the opposite free end of the sheet-shaped contactor. The actuator is under the action of a compression spring, whereby it exerts a pulling action on the opposite end of the shift range of the leaf spring. Due to the pulling action of the sheet-shaped contactor receives a stretched shape. When depressing the actuator, the pulling action is released; the blade-shaped contact relaxes under the action of its internal stress, goes into its warped form and thus enters the opposite switching position in which it is in electrically conductive connection with the second selection contact body. The switch according to the EP 1 533 823 A1 is thus a so-called snap-action switch, which has other switching properties than the first-mentioned switch according to the DE 44 20 665 B4 , Above all, with the switch according to the EP 1 533 823 A1 an exact setting of the switching function is not possible, as has been described at the beginning. In addition, at the switching effective free end of the elastically deformable contactor according to the EP 1 533 823 A1 the mentioned special switch body are placed, as well as on the cooperating surfaces of the opposite regions of the first and second Choice contactor; otherwise, reliable electrical contact can not be made.

The invention is therefore an object of the invention to provide an electrical switch in which the switching behavior during the switching regardless of the type of operation can be accurately adjusted, which also allows an intermediate position with contact to both Wahlkontaktkörpern and yet with a simple structure, easier production and easy assembly allows reliable operation over long periods of time.

The solution of this object is achieved with the entirety of the features of claim 1.

In the electrical switch according to the invention an elastically deformable contactor is provided in the basic form of a leaf spring. The deformation state of this contactor is changed by the action of an actuator. The contactor is provided with contact fingers which protrude from the plane of the leaf spring and can slide over contact surfaces formed on the first and second selection contact bodies. The sliding sweeping of the contact surfaces by the contact fingers on the type of sliding contacts causes a self-cleaning of the contact surfaces. This is important if the switch must be operated under adverse environmental conditions and, for example, oxide layers, silicate layers or other undesirable deposits on the contact surfaces can occur. Disturbing foreign layers can often be eliminated mechanically. Also foreign particles or abrasion particles of plastic parts can be removed by the sliding contacts from the common contact surface of contact fingers and contact surfaces. A separate return spring for the actuator is not required in principle.

The formed from the basic shape of a leaf spring elastically deformable contactor is inexpensive to produce as a simple stamping with bends and yet a multi-functional part, the function of a movable switching member, an electrically conductive contact and a return spring united in it.

Further developments of the switch according to the invention are specified in claims 1 to 11.

Claim 2 expresses above all the functional distribution of the contactor to which a clamping area, a central deformation region and an adjoining stiffened actuating region is successively provided, from which the contact fingers go out. The contactor can have either a stepped shape, a U-shape or an angular shape. By a step shape is meant that the clamping area and the actuating area - similar to a Z-shape - lie in two different planes and are interconnected by the deformation area extending therebetween, approximately perpendicular thereto. In a contactor with U-shape clamping area and operating area are also in different levels, but are facing each other, wherein the legs of the U forms the deformation region. In an angular shape, the apex area of the angle replaces the leg in the U-shape. The expressed in claim 2 design is the function of the contactor as a multifunction part conducive.

The embodiment according to claim 2 has the further advantage that the extent of the clamping region, the deformation region and the actuating region can be distributed differently over the length of the contactor. Thereby, a different gear ratio between the movement of the actuator and the switching paths of the contact fingers can be selected and set in the design of the switch. This means a further possibility of variation for the switching behavior. In contrast, in the initially mentioned switch according to the DE 44 20 665 B4 the actuator and the contactor with the contact plate connected to a fixed common linear motion. The movement of the actuator and the contact finger is thus fixed to the ratio of 1 to 1.

For the vast majority of tasks, the residual stress or bias of the contactor is sufficient to cause the required return to the preferred switching position. Where necessary, but can also be added according to claim 3 in addition to a reinforcing compression spring.

Claim 4 shows the possibilities for stiffening the operating area, while claim 5 has a particularly advantageous way to approach the contact fingers on the operating area to the object.

The claims 6 and 7 include an advantageous embodiment of the contactor and the selector contact body, as they come in particular in a contactor with step shape in question.

The claims 8 and 9 show advantageous design options based on the design of the contactor in U-shape.

The claims 10 and 11 have a modified embodiment of the subject, which proceeds from the formation of the contactor in angled shape.

In the specific design of the contactor according to the claims 2 to 11 is predominantly a pivoting movement of the actuator, because the deformation region of the leaf spring is relatively accurately located.

It should also be emphasized that in all embodiments, the contact fingers bent from the contactor move with their broad side on the contact surfaces of the two selector contact body. Even if the serving as sliding ends of the contact fingers are executed in the usual manner angled or warped, results in a narrow contact surface, which moves with its broad side over the contact surfaces of the selector contact body. This is a clear difference from the prior art according to the DE 44 20 665 B4 and supports a safe switching behavior as well as the self-cleaning of the switch. Likewise, in contrast to the prior art carries the specified in the claims Paired arrangement of the contact fingers due to their redundancy considerably for switching reliability.

• Fig. 1 ist eine räumliche, teilweise geschnittene Ansicht einer ersten Ausführungsform des erfindungsgemäßen elektrischen Schalters.
• Fig. 2 stellt den zu dieser Ausführungsform gehörenden Kontaktgeber in einer räumlichen Ansicht dar.
• Fig. 3 zeigt einen Längsschnitt durch den Schalter gemäß Fig. 1 in einer ersten Schaltstellung.
• Fig. 4 ist ein der Figur 3 entsprechender Längsschnitt in der zweiten Schaltstellung des Schalters gemäß Fig. 1.
• Fig. 5 hat die räumliche, teilweise geschnittene Ansicht einer zweiten Ausführungsform des erfindungsgemäßen Schalters zum Gegenstand.
• Fig. 6 ist eine der Fig. 5 entsprechende Darstellung desselben Schalters, wobei jedoch einzelne Teile weggelassen sind und der Schaltzustand gegenüber Fig. 5 verändert ist.
• Fig. 7 erläutert in einer räumlichen Prinzipdarstellung das Zusammenwirken von Funktionsteilen des Schalters gemäß den Figuren 5 und 6.
• Fig. 8 gibt eine Einzelheit zu Fig. 7 in einer vergrößerten und veränderten räumlichen Darstellung wieder.
• Fig. 9 enthält die räumliche Darstellung einer dritten Ausführungsform des erfindungsgemäßen elektrischen Schalters, wobei der Deckel des Gehäuses fortgelassen ist.
• Fig.10 zeigt den zu dem Schalter gemäß Fig. 9 gehörenden Kontaktgeber in einer leicht veränderten Ausführung.
• Fig.11 ist eine Prinzipdarstellung, aus der die räumliche Anordnung der Kontaktkörper bei dem Schalter der dritten Ausführungsform hervorgeht.

The invention will be explained in more detail with reference to embodiments which are illustrated in the figures. The figures show the following:

• Fig. 1 is a spatial, partially sectioned view of a first embodiment of the electrical switch according to the invention.
• Fig. 2 represents the contactor belonging to this embodiment in a three-dimensional view.
• Fig. 3 shows a longitudinal section through the switch according to Fig. 1 in a first switching position.
• Fig. 4 is one of the FIG. 3 corresponding longitudinal section in the second switching position of the switch according to Fig. 1 ,
• Fig. 5 has the spatial, partially sectioned view of a second embodiment of the switch according to the invention the subject.
• Fig. 6 is one of the Fig. 5 corresponding representation of the same switch, but individual parts are omitted and the switching state opposite Fig. 5 is changed.
• Fig. 7 explains in a three-dimensional schematic representation of the interaction of functional parts of the switch according to the FIGS. 5 and 6 ,
• Fig. 8 gives a detail Fig. 7 in an enlarged and altered spatial representation again.
• Fig. 9 contains the spatial representation of a third embodiment of the electrical switch according to the invention, wherein the cover of the housing is omitted.
• Figure 10 shows that to the switch according to Fig. 9 belonging contactors in a slightly modified version.
• fig.11 is a schematic diagram showing the spatial arrangement of the contact body in the switch of the third embodiment.

A first embodiment of the electrical switch according to the invention is shown in FIGS FIGS. 1 to 4 shown. This switch has a housing consisting of a base 1, the fastening projections 2 for fixing a lid 3 has. In the insulating material of the base 1, three contact bodies are embedded, namely a common contact body 4, a first selective contact body 5 and a second elective contact body 6. The contact body 4, 5 and 6 are of flat, disc-shaped shape and of different contour, see. the FIGS. 3 and 4 ,

A connection contact 4a is formed on the common contact body 4 at the bottom, as well as a connection contact 5a at the bottom of the first selection contact body 5 and a connection contact 6a at the bottom of the second contact body 6. The function of the switch is, depending on the switching position, to electrically connect the connection contact 4a to either the connection contact 5a or the connection contact 6a.

For this purpose, a contactor 9 made of an electrically conductive, elastically deformable material. The contactor 9 is in its basic form a leaf spring which is bent approximately to a Z-shape, see. Fig.2 , For its attachment to the base 1, a receiving socket 7 is integrally formed thereon, which is penetrated by the common contact body 4 and forms on its upper side a flat support surface for a flat clamping region 9a of the contactor 9. The common contact body 4 ends up in spreading elements 8, which protrude from the flat bearing surface of the receiving socket 7 and a fastening opening 10 in the planar clamping portion 9a of the contactor 9 prevail. In this way, the contactor 9 is firmly clamped to the base 7 and at the same time with the Terminal contact 4a of the common contact body 4 electrically connected.

The details of the contactor 9 are particularly clear from the Fig. 2 out. Thereafter, the leaf spring forming the basic shape of the contactor 9 has, opposite its clamping region 9a, a stiffened region which comes about through a large center opening 11 and two bent edge strips 12 which surround the center opening 11 in the longitudinal direction. At the in Fig. 2 front narrow side of the contactor 9 is a sliding and gripping jaw 15 is formed, whose meaning is explained below. As can be seen, the edge strips 12 together with the sliding and gripping jaw 15 form a rigid frame which is not substantially elastically deformable and serves as the actuating region 9c of the contactor. In contrast, the middle part of the Z-shape, which connects the clamping area 9a to the actuating area 9c, serves as the deformation area 9b of the contactor 9. When a deflecting force acts on the sliding and gripping claw 15 perpendicular to the plane of the leaf spring, the actuating portion 9c moves in a pivoting motion similar to a wheel spoke, deforming the deformation portion 9b.

On the edge strips 12 of the contactor 9, a first pair of contact fingers 13 and a second pair of contact fingers 14 are integrally formed. The contact fingers 13 of the first pair are opposite each other, as are the contact fingers 14 of the second pair. The contact fingers 13 and 14 are bent out of the plane of the edge strips 12 inwards and have a cranked shape so that they can deflect resiliently.

The distance between the paired contact fingers 13 and 14 from each other is such that they can embrace the flat, disc-shaped first and second selection contact body 5 and 6 and enclose from both sides. In this case, the contact fingers 13 and 14 are resiliently connected to the apex portion of their offsets on contact surfaces 5b and 6b of the selector contact body 5 and 6 at.

The exact assignment of the contact fingers 13 and 14 to the contact surfaces 5b and 6b after assembly of the switch goes from the FIGS. 3 and 4 out. In Fig. 3 is the contactor 9 in its first switching position, which comes about by the residual stress or bias of its deformation region 9b. The contact fingers 13 of the first pair lie against the contact surfaces 5b of the first selective contact body 5 and form with their offsets resilient sliding contacts. They also maintain an electrically conductive connection with the contact surfaces 5b when they move on the contact surfaces during a pivoting movement of the actuating region 9c. The contact fingers 14 of the second pair are ineffective in the first switching position of the contactor 9.

In the presentation of the FIG. 4 is the contactor 9 in its second switching position. The actuating portion 9c of the contactor 9 is now approximately horizontally down near the base 1, and the contact fingers of the first pair 13 are now ineffective. For the contact fingers 14 of the second pair now encompass the flat, disc-shaped second selection contact body 6 and are applied as sliding contacts on the contact surfaces 6b.

Thus, in the first switching position ( Figure 3 ), the terminal contact 4a of the common contact body 4 with the terminal contact 5a of the first selective contact body 5 electrically connected. In the second switching position ( Fig. 4 On the other hand, there is an electrically conductive connection between the connection contact 4 a of the common contact body 4 and the connection contact 6 a of the second selection contact body 6.

It protrudes with a control head 18a outwardly through the lid 3 of the switch, wherein the passage opening located in the cover 3 is sealed by a sealing sleeve 19. Inwardly, the actuator 18 ends like a fork in two arms 18b, which form between them a pressure surface 18c and engage around the sliding and gripping jaw 15 of the contactor 9, see. For this Fig.1 and the identical construction of the holding member 18 according to Figure 9 top right).

By pressing down on the actuator 18, the residual stress or bias of the contactor 9 is overcome. This is elastically deformed, and its operating portion 9c is down in the second switching position according to FIG. 4 transferred. The elastic restoring force of the contactor 9 is sufficient in many cases to achieve a clear switching behavior. If necessary, the switching and restoring force can also be increased by the arrangement of an additional compression spring 17. It is formed in the illustrated embodiment as a coil spring which is inserted into a holding recess 16 at the bottom of the base 1. At its opposite end, the sliding and gripping jaw 15 engages in the interior of the compression spring 17. At the same time, the compression spring 17 is also held from the outside by the arms 18b of the actuator 18. In order for the two pairs of contact fingers 13, 14 to more easily encompass the contact surfaces 5b, 6b of the first and second selection contact bodies 5, 6, the two selection contact bodies 5, 6 are at their narrow sides in the path of the contact fingers 13, 14 with run-on slopes 5c, 6c Mistake.

The consisting of an elastic and electrically conductive material contactor 9 is a multi-functional part, which is able to perform both the contact via the contact fingers 13, 14 and the return of the actuator 18 in the first switching position. In practice, the switch is executed in the subminiature area; The control head 18a of its actuator 18 is acted upon by cases, for example, by a moving control cam of a mechanical or hydraulic control device.

The FIGS. 5 to 8 have a second embodiment of the switch according to the invention the subject. In these figures, the parts remaining unchanged from the first embodiment are denoted by the same reference numerals as before. Above all, the shape of the contactor 25, which also has a modified form of the contact body, has been changed pulls. In the second embodiment of the contactor 25, the output form of the leaf spring is bent in a U-shape, so that the chucking portion 25a and the plane operating portion 25c are superimposed; They are also connected to each other here by a deformation region 25b. In the extension of the chucking area 25a, two contact fingers 26 which are bent out of the plane of the leaf spring and protrude from this extend in a straight line. The contactor 25 thus has only a single pair of contact fingers 26; This design results in a shortened length of the switch.

Incidentally, the configuration according to the first embodiment is basically maintained. The common contact body 21, like the first selection contact body 22 and the second selection contact body 23, has a flat, disc-shaped configuration with connection contacts 21a, 22a and 23a. The contact portions 26a of the contact fingers 26 are bent inwardly to the width of the two selector contact bodies 22, 23 and bent in cross-section V-shaped, the inner apex lines 26b of the V-shape form sliding contacts, which the contact surfaces 22b, 23b of the first and second Pass over the contact contact body 22, 23 ( Fig. 8 ). Run-up bevels 22c, 23c also facilitate the embracing of the selector contact bodies 22, 23 by the contact fingers 26.

The contactor 26 has to cooperate with the actuator 18 at its contact fingers 26 opposite end on a Gleitwölbung 27, which forms the end of the actuating portion 25c. The common contact body 21 terminates at the top in a rivet-type fastening head 24, which passes through an opening in the clamping region 25a of the contactor 25 and thereby mechanically and electrically conductively secures it.

A third embodiment of the electrical switch according to the invention is derived from the FIGS. 9 to 11 out. Essential parts of this are already based on the FIGS. 1 to 4 described and designated by the same reference numerals as there. There are again a common contact body 31 with a connection contact 31 a and a first and second selection contact body 32, 33rd with connection contacts 32a and 33a available. With 31b and 33c anchoring openings are designated, with which the common contact body 31 and the second contact body 33 are secured in the insulating material of the base 1. In contrast to the embodiments already described, in the first and second selective contact bodies 32 and 33, the flat, disc-shaped shape is no longer continuously maintained. Rather, the areas forming the contact surfaces 32b and 33b of the two selector contact bodies 32, 33 are bent out by about 90 ° from the planar basic shape of the selector contact body; they thus run transversely to the longitudinal direction of the contactor 35th

This again has the basic or initial shape of a flat leaf spring which extends in its longitudinal direction over all three contact bodies 31, 32 and 33. The clamping area 35a of the contactor 35 is bent out of the starting plane and bent back until it extends at an acute angle to the remaining part of the contactor 35 ( Fig. 10 ). An attachment slot 36 serves to push on a fastening projection 34, which is formed on the common contact body 31. The curvature area of the turn becomes the deformation area 35b; this function is particularly supported by a central recess 37 in this area.

The remaining region of the leaf spring forming the contactor 35 is subdivided by two longitudinal recesses 39 extending in its longitudinal direction and projecting from the free end of the contactor 35, which lies opposite the clamping region 35a, into the center region of the contactor 35. The longitudinal recesses 39 divide off a central web of two contact fingers 40, which are bent in an angular manner in the same manner as the clamping region 35a from the plane of the leaf spring and form sliding contacts with their resilient ends. The middle bar, however, is stiffened by a reinforcing bead 38 and remains substantially in the starting plane of the leaf spring. It thus forms the actuating region 35c of the contactor. If the already mentioned additional compression spring 17 is to be used, the free end of the actuating portion 35c is provided with an engagement end 41, which in the Compression spring 17 engages ( Fig. 9 ). With its lower end, the compression spring is attached to a support base 42.

However, in cases where the holding and restoring force of the contactor 35 is sufficient for a proper switching function, it is preferable for the free end of the operating portion 35c to be formed with a slight curvature (FIG. Fig. 10 ).

In the assembled state, the contactor 35 receives a longitudinal stress, because it encompasses on its one side with its clamping portion 35 a and on the other side with the resilient contact fingers 40, a central region of the base 1. This results in a sufficiently large contact pressure for acting as sliding contacts, resilient ends of the contact fingers 40. In the embodiment according to the FIGS. 9 to 11 For example, the contact surfaces 32b and 33b are provided on only one side of the first and second select contact bodies 32 and 33. Those areas of the selective contact bodies 32 and 33, on which the contact surfaces 32b and 33b are located, are firmly supported with their rear sides in the base 1. The achieved over the deformation region 35b bias of the contactor 35 causes the first switching position of the switch, in which the two contact fingers 40 contact the transverse to the longitudinal direction of the contactor 35 extending contact surface 32b of the first selective contact body 32 switching effective. By depressing the actuator 18, the bias of the contactor 35 is overcome and the second switching position brought about, in which the contact fingers 40 abut against the contact surface 33b of the second selection contact body 33.

References list FIGS. 1 to 4:

1

base

2

fixing projection

3

cover

4

common contact body

4a

connection contact

5

first elective contact body

5a

connection contact

5b

contact area

5c

starting slope

6

second selection contact body

6a

connection contact

6b

contact area

6c

starting slope

7

Female Sockets

8th

spreading

9

Contactor (leaf spring)

9a

clamping

9b

deformation zone

9c

operating range

10

fastening opening

11

center opening

12

sidebar

13

first pair of contact fingers

14

second pair of contact fingers

15

Sliding and gripping claw

16

holding trough

17

compression spring

18

actuator

18a

control head

18b

poor

18c

print area

19

sealing sleeve

FIGS. 5 to 8 additionally:

21

common contact body

21 a

connection contact

22

first elective contact body

22a

connection contact

22b

contact area

22c

starting slope

23

second selection contact body

23a

connection contact

23b

contact area

23c

starting slope

24

fastening head

25

Contactor (leaf spring)

25a

clamping

25b

deformation zone

25c

level operating area

25d

Transition area

26

contact fingers

26a

contact area

26b

inner crest line

27

Gleitwölbung

FIGS. 9 to 11 additionally:

31

common contact body

31 a

connection contact

31 b

anchoring opening

32

first elective contact body

32a

connection contact

32b

contact area

33

second selection contact body

33a

connection contact

33b

contact area

33c

anchoring opening

34

fixing projection

35

contactor

35a

clamping

35b

deformation zone

35c

operating range

36

mounting slot

37

center opening

38

reinforcing bead

39

longitudinal recess

40

contact fingers

41

engaging

42

support base

Claims (11)

1. Electrical switch in which the following features are provided:

   a) a common contact body (4, 21, 31);

   b) an elastically deformable contactor (9, 25, 35) in the basic form of a leaf spring that is continuously joined in an electrically conducting manner to said common contact body (4, 21, 31);

   c) an actuating member (18) that can be used to alter the deformation state of said contactor (9, 25, 35);

   d) a first selective contact body and a second selective contact body (5, 6; 22, 23; 32, 33) on which are disposed contact surfaces (5b, 6b; 22b, 23b; 32b, 33b) for cooperating with said contactor (9, 25, 35);

   e) said contactor (9, 25, 35), under the effect of its pre-tension, is in switching contact with said first selective contact body (5, 22, 32), but when said actuating member (18) is actuated is in switching contact with said second selective contact body (6, 23, 33);

   f) for switching contact of said contact surfaces (5b, 6b; 22b, 23b; 32b, 33b) disposed on said selective contact bodies (5, 6; 22, 23; 32, 33), said contactor (9, 25, 35) is provided with contact fingers (13, 14; 26; 40) that project from the plane of said leaf spring that forms the basic shape of said contactor (9, 25, 35);

   g) said contact fingers (13, 14; 26; 40) together with said contact surfaces (5b, 6b; 22b, 23b; 32b, 33b) of said two selective contact bodies (5, 6; 22, 23; 32, 33) geometrically form a common contact surface in which said contact fingers (13, 14; 26; 40) slidingly cover said contact surfaces (5b, 6b; 22b, 23b; 32b, 33b) of said selective contact bodies (5, 6; 22, 23; 32, 33) when said contactor (9, 25, 35) is deformed.
2. Switch in accordance with claim 1 in which the following features are provided:

   a) starting from the basic shape of a longitudinal, flat leaf spring, said contactor (9, 25, 35) has a step-shape, a U-shape, or an angular shape;

   b) said contactor (9, 25, 35) extends in its longitudinal direction across said common contact body (4, 21, 31) and said two selective contact bodies (5, 6; 22, 23; 32, 33) that are arranged one after the other in said longitudinal direction;

   c) said contactor includes a clamping area (9a, 25a, 35a), a center deformation area (9b, 25b, 35b) adjacent thereto, and adjacent a stiffened actuating area (9c, 25, 35c), whereby said deformation area (9b, 25b, 35b) is formed by said center area of said step-shape, the bar of said U-shape, or the apex area of said angle shape;

   d) said contactor (9, 25, 35) is fastened via its clamping area (9a, 25a, 35a) to said common contact body (4, 21, 31) and to a base (1) of the switch housing and under the effect of its pre-tension is in contact via its stiffened actuating area (9c, 25c, 35c) with said actuating member (18);

   e) said contact fingers (13, 14; 26; 40) originate from said actuating area (9c, 25c, 35c) of said contactor (9, 25, 35).
3. Switch in accordance with claim 2 having an additional compression spring (17) that reinforcingly acts on the pre-tension of said contactor (9, 25, 35) on said actuating member (18) and said actuating area (9c, 25c, 35c) of said contactor (9, 25, 35).
4. Switch in accordance with claim 2 or 3, in which said actuating area (9c, 25c, 35c) is stiffened by edge strips (12) bent laterally out of said contactor (9, 25, 35) and/or at least one reinforcing bead (38) embodied on said actuating area (9c, 25c, 35c) that both run in the longitudinal direction of said contactor (9, 25, 35).
5. Switch in accordance with claim 4, in which said contact fingers (13, 14; 26) originate from said edge strips (12) and form their projection.
6. Switch in accordance with claim 5 in which running in the longitudinal direction of said contactor (9) said actuating area (9c, 25c, 35c) has a center opening (11) into which said first (5) and said second selective contact body (6) project, and in which provided on the longitudinal sides of said center opening (11) are two pairs of contact fingers (13, 14), of which each is embodied for bilateral switching enclosure of one of said selective contact bodies (5, 6), whereby depending on the deformation state of said contactor (9) and the position of said actuating area (9c) determined thereby said first selective contact body (5) and/or said second selective contact body (6) is connected in an electrically conducting manner to said contactor (9).
7. Switch in accordance with claim 6 in which said first selective contact body (5) and said second selective contact body (6) have a flat, plate-like configuration, whereby, embodied on their wide sides against which said contact fingers (13, 14) come to be positioned, said contact surfaces (5b, 6b) are arranged in the longitudinal direction of said contactor (9) and said center opening (11).
8. Switch in accordance with claim 5 in which the following features are provided:

   a) said actuating area (25c) of said contactor (25) is bent back over said center deformation area (25b) in a U-shape in the direction of said clamping area (25a);

   b) said two edge strips (12) disposed on said clamping area (25a) are extended in the longitudinal direction of said actuating area (25c) beyond the latter and form two contact fingers (26);

   c) said two contact fingers (26) enclose in a fork-like manner said selective contact bodies (22, 23) arranged between them;

   d) said selective contact bodies (22, 23) embodied flat and plate-like on their wide sides have said contact surfaces (22b, 23b) for cooperating with said contact fingers (26).
9. Switch in accordance with claim 8, in which said two contact fingers (26) embodied fork-like originate in the transition area (25d) between said actuating area (25c) and said clamping area (25a) of said edge strips (12) and extend opposing the free end of said actuating area (25c).
10. Switch in accordance with claim 4 in which the following features are provided:

    a) said contactor (35) has a longitudinally extended shape in which its clamping area (35a) is bent back across said deformation area (35b) in the direction of said actuating area (35c) such that it runs at an acute angle to the latter.

    b) out of said actuating area (35c), separated on the edge sides by two longitudinal recesses (39) that originate from its free end are two contact fingers (40) that are also bent back in the direction of the remaining actuating area (35c);

    c) said remaining actuating area (35c) is stiffened by a reinforcing bead (38);

    d) said first selective contact body (32) and said second selective contact body (33) have contact surfaces (32b, 33b) running transverse to the longitudinal direction of said contactor (35) for cooperating with said contact fingers (40), whereby

    e) said two contact fingers (40) spaced apart from one another are always positioned jointly either against said contact surface (32b) of said first selective contact body (32) or against said contact surface (33b) of said second selective contact body (33).
11. Switch in accordance with claim 10, having selective contact bodies (32, 33) that have a flat, plate-like basic shape, from which those areas on which said contact surfaces (32b, 33b) are formed are bent by 90°.

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