DE1963169A1 - Electrical switch with sliding contacts and wired contact pins - Google Patents

Description

DIPL.-INQ. GÜNTHER EISENführer

DIPL-ING. DIETER K. SPEISER 1963 169

PATENT LAWYERS

File number: New registration 28 BREMEN 1

BORaERMEISTER-SMIDT-STR. M.

MMELOERNAME: MOlEX PRODUCTS COMPANY <τ r r ν ι ο α ο - η α u ·>

TELEPHONE: <· <») MMfT TELEORAMME: FERROPAT

BREMER BANK 1001071 POSTSCHECK HAMBURa 2SSTST UNDER SIGN: M 115

Date: December 16, 1969

MOlSX PRODUCO) S COMPANY, incorporated under the laws of the State of Illinois, 5534 Katrine Avenue, Downers Grove , Illinois 60515 (V. St. A.)

Electrical switch with sliding contacts and wired contact pins

The invention relates to an electrical switch, in particular an electrical switch with sliding contacts.

In the electrical switches according to the state of the art With sliding contacts, the connection to an external circuit is made by a conductor wire connected to a Screw terminal of the switch is connected. It is a stripped part of the conductor wire under the terminal screw trapped.

When the connection to the external circuit changed is to be, the terminal screw must be unscrewed, the conductor wire removed, another wire around the The terminal screw is wound and the terminal screw is sucked in, so that a new electrical connection is established. This procedure is not only "gloomy", but *

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This is also done by using the Y / tool to connect of the wires to the switch terminals are required.

Furthermore, the fixed contacts and the sliding contacts of the prior art switches are relative fixed to each other, so that the switch is unusable if the contacts are no longer in their exact position Positions.

The object of the invention is to propose a novel, improved electrical switch with sliding contacts, the disadvantages mentioned above due to the use of pre-wired Contact pins and sliding contacts that automatically compensate for positional deviations of the contact pins, ' so that they touch them sufficiently, electrically conductive, avoids.

Sin inventive electrical switch with sliding contacts has a housing made of an electrically insulating material and a slide button that consists of a The end of the housing protrudes. A pair of sliding contacts is attached to the sliding button and protrudes into the housing and can be moved to multiple positions. Wired contact pins, which can be inserted into openings in the housing serve as fixed contacts. Contact pins of this ax are described in U.S. Patent 3,178,673. By moving The sliding contacts are specified with the slide button Contact pins brought into singriff so that an electrical connection is made between them.

A preferred Ausführungsurigsform of the electrical switch according to the invention has a rocker arm, the type attached to the one end of the housing let that he is with

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the sliding button mechanically End of the rocker arm on the slide button a force is exercised, which the slide button in an assigned Direction moved so that the switch is operated.

The invention is explained in detail below with reference to the embodiments shown in the drawings. It shows: Ϊ

Fig. 1 is a perspective view of an embodiment of an electrical switch according to the invention with sliding contacts;

Fig. 2 is a perspective view of a modified one Embodiment of an electrical switch according to the invention with sliding contacts;

3 is an enlarged, fragmentary, longitudinal section the electrical switch according to FIG. 2;

FIG. 4 shows a section 4-4 according to FIG. 3; FIG. 5 shows a section 5-5 according to FIG. 3i

6 shows a rear view of a sliding contact of a electrical switch according to the invention;

Flg. 7 shows a side view of the sliding contact according to FIG. 6;

8 shows a perspective exploded view of the electrical switch according to FIG. 2;

009828/1197

9 shows a section 9-9 according to FIG. 3; FIG. 10 shows a section 10-10 according to FIG. 9;

11 and 12 a schematic representation of the interaction of the fixed contact pins and the 'movable sliding contacts of an electrical switch according to the invention, if the fixed Contact pins are aligned in one case and offset from one another in the other}

13 shows a section 13-13 according to FIG. 14 of a modified embodiment of an inventive electric switch;

FIG. 14 shows a horizontal section 14-14 according to FIG. 13 a modified embodiment of an electrical switch according to the invention;

15 shows a vertical section 15-15 according to FIG. 13i

16 shows a perspective view of a slide key according to the invention;

17 is a perspective view of a contact pin of the embodiment of the invention electrical switch according to FIG. 14;

18 shows a perspective view of a sliding contact of the embodiment of the invention electrical switch according to Fig. 14. *

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".", ORfÖINAL INSPECTED

According to FIG. 1, a first embodiment IO has one electrical switch according to the invention with sliding contacts a housing 12, preferably made of plastic injection molding, with four interconnected side walls 14 »16, 18 and 20 (see also Fig. 9). The housing has a upper part 22 and a lower part 24. The upper part 22 and the lower part 24 have a square shape Cross-section. The upper part 22 is larger than the lower Part 24 »so that it protrudes over the lower part 24. A pair of outwardly and upwardly splayed fins 26 are integral with the opposing side walls 14 and 18 of the upper part 22 of the housing 12. Each fin 26 has a first end 28 on. attached to the housing wall, while its second, free end 30 at an acute angle from the 'housing wall to the outside protrudes. According to FIG. 3, the free end 30 has an inwardly bent part 32 with an outer, grooved one or serrated surface 33. The fins 26 are resilient so that you can see the switch housing 12 fully in an opening of a chassis or the like (not shown) can be inserted.

A cover plate unit 34 »· also made of injection-molded plastic, has a cover plate 35 which is attached to an upper end 38 of the housing 12. A slide button 39 of an insulating, plastic slide element 37 of a sliding contact unit 40 extends upwards from the switch housing through an opening in the cover plate 35. The slide button 39 can be pushed back and forth in the opening 36 in the directions indicated by arrows. ;

A second, modified embodiment 42 unite he inventive switch with sliding contacts according to

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009828/1147

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Fig. 2 through 10 is the first embodiment 10 according to Pig. 1 and has many identical parts. These same individual parts are identified by the same reference numbers, but with the additional index "a ¹¹ ".

The switch 42 is equipped as shown in FIG. 2 with a rocker arm unit 44, so that a slide button 39 a α by a pushing movement instead of a direct sliding movement can be operated. To attach the rocker arm 44, each of the opposing side walls 16 a and 20 a modified so that they have an integrally formed with it, according to FIGS. 2 and 8, protruding upwards, triangular extension 46 has. Each of the extensions 46 has to accommodate. Pivot pins 49 des Rocker arm 44 an elongated hole 48. The cover plate 35 a of Cover plate unit 34 a has additional incisions 50 on opposite edges for receiving of the extensions 46 · Furthermore, the cover plate 35 a has incisions 50 and the extensions 46 adjacent upstanding bearing journals 51. ■

The rocker arm unit 44 has a rocker arm 52 insulating material, preferably plastic, with identical wing-like ends 54 and 56. The wings 54 and 56 each have an opening 58 and 60, respectively extends through wings 54 and 56 such that it the weight of the rocker arm 52 is reduced. The rocker arm 52 has a relatively flat underside 62 with a Pair of downwardly and inwardly protruding cams 64 and 66, the are integrally molded with the rocker arm 52. The cams 64 and 66 have ends 68 and 70 with a Saar each « ,; while opposite one another, wedge-shaped to one another inclined surfaces 72, 74 or 76 #

009828/1187

The tops 80 of the rocker arm 52 let curved in this way or inclined so that its lowest point is in the middle 82 and it rises towards the wings 54 and 56. According to Pig. 8 Is a central scar fixed, transverse arranged in rocker arm 52. The scar 84 has a pair opposite sides of the rocker arm outwardly protruding pegs 85. Each of the pegs 85 has a lower flat surface 87 which is placed on the upper beveled surfaces 89 of the laying pegs 51 of the cover plate 35 a rest, the hinge pins 49 of the rocker arm 52, which protrude from the pin 85 to the outside, are so iron on the elongated holes 48 of the extensions 46 that they can be pivoted in the elongated holes 48, if the tenons 85 on the beveled upper surface 89 of the bearing pin 51 in a limited pivoting movement move. According to Fig. 3, the squats 64 and 66 come with associated band surfaces 84 and 86 of the slide button 39 stui lingriff, so that the cam surface 72 of the first cam 64 with the depression of the above wing (in Fig. The left wing 54) of the rocker arm 52 the Bndfläche 86 of the slide button 39 a comes into engagement such that it moves the slide button 39 a and the sliding contact unit 40 a in the opening 36 a, so that the switch 42 is operated. According to Fig. 3, the end plate 35 aif has opposite sides the opening 36 a beveled edges 90 and 92, so that the wedge-shaped ends 68 or 70 of the cams 64 and easily while pressing the slide button 39 a let move over the edges 90 and 92 away. The function of the switch 42 of the rocker arm unit 44 becomes described in detail later. «'

8 has the sliding contact unit 40 and 40a of the two embodiments 10 and 42 of the invention **

009828/1197

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read tmtere branches 100 of the actuating element © © I? A sliding contact unit 40a extends from the tsste 39a downward into a chamber 102 in the Senäuee 12a . 8, the lower end 100 of the actuating element 37a has an incision 103 and 104 each in opposite side walls for receiving a pair of sliding contacts 106 and 108 according to Hg, 4. The incisions 103 and 104 extend into the sliding. button 39 a »so that pockets 110 and 112 for receiving first ends 114 and 116 of the pair of sliding contacts 106 land 108 arise. The ends 114 and 116 of the grinding assemblies 106 and 108 are held in the pockets 110 and 112, as shown in FIG. 4, by barbs 118 and 120 which are formed at the ends 114 and 116 and come with an inner surface of an associated wall SiUB singles, · © that the sliding contacts 106 and 108 are held in the incisions 103 and 104.

According to FIGS. 6 and 7, each sliding contact 106 is Mr. 108 as a one-piece construction made of a spring metal

009S28 / 1197

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forms * Each of the sliding contacts 106 and 108 has a U-shape, which is created by bending back a single metal strip. A first leg 122 of the sliding contact 106 or 108 is longer than a second leg 124 * The first leg 122 has a main part 126 with a stiffening rib 128 which serves to stiffen the leg 122 and to fulfill other tasks described later. The upper end 130 of the first leg 122 is narrower than the main part ν126, so that it can be accommodated in a pocket, for example 110, of the * slide button 39 a. As previously described, the upper end 130 is held in the pocket by a barb 118.

The second leg 124 of the U-shaped sliding contact 106 or 108 has a lower part 134, which is also equipped with a stiffening rib and with a sliding contact plate 136 is connected that is formed at the free end of the leg 124. The contact sheet 136 is convex from the center of the U-shaped sliding contact 106 or 108 curved outwards. The contact sheet 136 has curved inward towards the zenith of the U;

Side parts 138 that extend beyond the U, \

in order, as will be described later, a good electrical connection between the fixed contact pins dee Switch 10 or 42 to bring about,

According to Pig, 4 the underside of the switch housing is 12. j equipped with several cylindrical bores 140. Each of the bores 140 extends through the housing into the chamber 102. Each of the bores 140 receives a wired contact pin 142, for example a contact pin from the * US Patents, s 3,178,673, Die Kontakt et if te 142 beeitwn . j a lylin ^ risehee front bath 141 "it a rvndea" sit- '~ j * e. Dae verdere lade Ul der l «nt * irt§tifte 142 ** § * der * I _ ^

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1963109-

art in the chamber 102 such that it comes and 108 to the contact plate 136 of an associated wiper contact 106. In contact. Each of the contact pins 142 has a clamping device 143 at its rear end, with the help of which according to Pig. 10, a conductor wire 145 can be clamped to each contact pin 142 before it is inserted into the switch housing 12. Each contact pin 142 has a plurality of outwardly protruding barbs 144 which are integrally formed therewith and which bear against shoulders 146 of the side walls of the bores 140 in the housing 12 and thereby prevent the accidental removal of the contact pins 142 from the housing 12. The contact pins 142 can, however, be removed from the housing 12, 12 if the barbs 144 are bent into a position in which they allow the contacts 142 to be pulled out of the bores 140.

According to FIG. 4, each sliding contact unit 40, which can be actuated by the slide button 39a, with two Sliding contacts 106 and 108 equipped. The sliding contacts 106 and 108 are through a middle part 148 of the lower end 100 of the actuating element 37 a separated from one another, so that the sliding contacts 106 and 108 are independent of each other and if desired can be assigned to separate circuits.

In the switch 10, two sets of three pin holes 140 each in the Unterei te of the housing 12 for receiving an equal number of wired con tact pins 142 are shown in the drawings. The contact pins 142 are arranged so that they come into engagement with the pair of Sehleif contacts 106 and 108 of the Sehleifkomtukteinlieit 40 &. When the sole is $ * st * 39 * ftttiü fig. 10 is pushed in one direction , te * riü «? T | t ## *

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Position relative to the bottom of the contact pin 142, snap-in

> 'die.Hippe 134 depending on the direction of movement

the slide button 59 a in the one or the other of the ; th 150, Wffi the sliding contacts 106 and 108 in the general

chose position ψι siohern. If the sliding contacts in ■ '. "- /. ;;.;" / "Jieit-40 a is pushed to the left according to fig * 5, touch

»Ea the sliding contacts | Ö6 and 108 according to FIG. 9 the cons ;; ^" ^: ■; [. V ■ ΐ ^. "_.;: '■ talct © pins 1 ts» d 2 #. tm to electrically connect you! ^ l »dea. ^ iDiJ Jig · isiÄ in

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The two embodiments 10 and 42 are functional of the electrical switch according to the invention largely the same, the only difference is in the transmission the actuation force on the slide button 39 a the grinding « contact unit 40 a. In the embodiment 10, the required force to move the slide button 39 a in the direction of the arrows according to? ig. 1 to move and thereby the To operate switch 10, directly manually applied to the slide button 39 a »In the case of the design 42, the by depressing one or the other wing 54 or 56 of the rocker arm 52 onto the rocker arm unit 44 exerted force transferred to the slide button 59 a.

In accordance with the puncture, the switch 42 is operated by that the above wing (in Pig »3 the hill 54) of the rocker arm 52 is pressed down so that the after cams 64 protruding below through the cam surface 72 with the outer side surface 86 of the slide key 39a comes into engagement. The rocker arm 52 pivots over dit End faces 89 of the bearing pin 51 of the cover plate 53 a, so that the cam 64 can move the slide button 39 a. By moving the sliding button 39 a, the sliding contact unit 40 a is placed in the switch housing 12 postponed. The for moving the sliding contact unit 40a The force required is sufficient to push the rib 134 out of the groove 150 into which it is inserted according to Pig. 5 engaged was, and the contact plates 136 dragging from the one in Flg. 9 with one-numbered contact pin 142 to separate.

Due to the force still acting on the rocker arm 52 comes the cam 64 according to Pig. 3 with the beveled Edge 90 of the opening 36 a in the cover plate 35 a in contact and combs over the edge 90 until the cam flfc- / before 74 of the cam 64 finally reaches a position

BATH ORIGINAL 009828/1197.

which corresponds to the position that the cam 66 in Pig. 3 holds. In this position, the cam 64 is then partially inserted into the opening 36 a and wedged between the side surface 86 of the sliding button 39 a and the beveled edge 90. During this movement, the ribs 134 of the sliding contacts 106 or 108 move out of the first groove 150 along the inner walls 152 into the second groove 150, whereby the sliding contact unit 40a is locked in a position in which the contact plates 136 are the same as in Pig. 9 numbered with two and three. Contact pins 142 to electrically connect them to one another. It is evident that the contact plates 136 according to Pig. 9 always remain in sliding contact with the associated contact pin 2, while, however, depending on the direction of movement of the sliding contact unit 40 a, they alternately interrupt and establish contact with the contact pins 1 and 2. Since the sliding contacts 106 and 108 are made of Pedermetall, they can be rotated or pivoted in the housing 12 in such a way that they always come into sliding contact with the associated contact pins 142 in order to ensure a good electrical connection between the contact pins 142. This process is shown schematically in Pig.Il, in which the Kontakts.tifte 142 are also numbered from one to three. In Pig. 11 ^are: contact plates shown in two positions 136, ie they first connect electrically the contact pins 1 * and 2 and are moved during the ITmöchaltvorganges that it 2 and 3 touching the contact pins. If the Koty »Diplomatic plates 136 st from the left position toward the contact moves if te 3 _p twisting. so that they touch the contact pins 3 with: their rounded side parts 138. As a result, the contact plates 436 drag along the contact pins a 3 as well as

on the contact pins 2, so that deposits or corrosion layers removed from the contact pins and thereby a good electrical connection between the contact pins 2 and 3 is ensured. In the end take the sliding contacts 106 and 108 a similar one Position as shown on the left in FIG A position in which the contact plates 136 are in direct contact with both contact pins 2 and 3.

The rotational or pivoting movement of the contact plates 136 is permitted by the ribs 128 of the legs 122 of the sliding contacts 106 and 108 (FIGS. 6 and 7). According to 9, the ribs 128 of the sliding contacts 106 and 108 rest on associated inner walls 156 of the actuating element 37 a of the sliding contact unit 40 a, see above that the grinding contacts 106 and 108 around the ribs 128 are pivotable. In this way twist or pivot the Kontaktbleehe 136 so that they with the respective Make contact with 142 during the to-and-fro movement of the Sliding contact unit 40 a by a powerful sliding movement to intervene. when the switch is operated will.

Occasionally, contact pins 142 which are inserted into the associated bores 140 of the housing 12 accidentally occupy positions which are not aligned with the positions of the other contact pins 142. However, this does not impair the functionality of the switch, since the contact surface 136 is able to compensate for these position deviations. FIG. 12 schematically shows such an example in which the middle contact pins 2 are outside the alignment of the contact pins 1 and 3. Tez eats mean one! upper contact pin 2 - view pocket. auf 'da «y

associated contact plate 156 and the middle lower one Contact pin 2 from the other associated contact sheet 136 offset. The pivoting movement of the Touch sliding contacts 106 and 108 around the ribs 128 the associated contact plates 136 nevertheless the contact pins 2 sufficiently strong. 12 swings that Contact sheet 136 of the upper sliding contact 108 clockwise sense to connect the contact pins 1 and 2 together and counterclockwise to the contact pins 2 and 3 to be connected to each other. The lower sliding contact 106 swivels clockwise in the same way » do the Xcontact pins 1 and 2 to connect together » and counterclockwise to contact pins 2 and 3 to connect with each other.

The contact pin © 142 described so far work largely satisfactorily in many cases. However, they are more or less firmly clamped and have little elasticity. Another improved, modified embodiment of the electrical switch according to the invention according to FIG. 13 to 17 avoid these disadvantages. Although the switch according to the invention according to FIGS. 13 and 15 is shown without a rocker arm, it can, however, be equipped with a rocker arm. The individual parts are the same as never described above or are functionally equivalent to the individual parts described above. Therefore, the same reference numerals a, but with an additional index ⁿ b ⁿ , are used for the same, identical parts.

The upper housing part 22 b has a pair of flexible, cantilevered webs 160, the grooves 162 of the lower Housing part 24 b are added. The fins 26 b are attached to the webs 160. In addition, the Bars 160 inwardly directed hooks 164, which are below

00982 * 711 »7

Snap shoulders 166 of lower housing part 24 b, around the two housing parts semi-permanently with each other connect to. .

The actuating element 37 b is largely the same as the » previously described. However, with the exception that his lower end 100 b slightly larger I * t: and according to Pig. 15th U-shaped grooves 168 open at the bottom and at the sides on the mount largely complementary shaped webs iron movable Has sliding contact ^ 106b · and 108b. The sliding contacts 106 b and 108 b slide more or less on the Actuating element 37 a, since the grooves 168 are larger than Bind the webs 170. The sliding contacts 106 b. and 108 b have a contact surface 172 with vertical, spaced to each other arranged fillet grooves 174, in which the feet- * engage the standing contact pins.

The fixed contacts also consist of wired, insertable contact pins 142 b (6 contact pins are also shown). According to Pig * 17, the contact pins 142 b do not correspond to the round contact pin type described so far. Each contact pin 142b has a U-shaped body 176, the central web 178 of which rests flat against the associated side wall 16b or 20b. Opposite, flat outwardly protruding barbs 180 and 182 come into engagement with horizontal partitions 186 in vertical incisions 188 of the side walls 16b and 20b in order to limit the insertion and withdrawal of the contact pins 142b. Each contact pin 142b has two Xaschenpaar® 190 · and 192, in which the stripped iteahtend and the Ißöliermantel of a ladder wire 145 b are included: w © £ des Ιε & ηΆ. Furthermore, each contact pin 14? b a pair of? AnseixlaglaseheA 194 arranged parallel to one another.

009828/1197

1063169

The forward end of each contact pin 142 is at 196 bent back, so that an elongated, in the longitudinal direction arcuate contact finger 198 with largely arched cross-section arises. The lower end the contact finger 198 extends between the tabs 194, which limit the lateral deflection of the contact finger 198 when it is connected to one of the sliding contacts 106 b or 108 b comes into play.

According to Pig. 13 and 15, the cover plate 35 b has incisions 202 for receiving the front ends 106 of the contact pins 142 b, which together with the tabs 180 and 182 exactly position the contact pins 142 b in the incisions 188 in the direction of movement. As a result of that the U-shaped body of the contact pins 142 b rest on the side walls 16 b and 20 b, is prevented the contact pins 142 b bend away from the sliding contacts 106 b and 108 b. The inherent elasticity of the metal of the contact pins 142b and the bent-back front ends 196 provide the elasticity of the contact fingers 198 sure. The arcuate cross-section of the contact fingers 198 and the shape of the contact surface 172 (including the keyways 174) of the sliding contacts 106 b and 108 b represent a grinding and cleaning effect Contact between the contact pins 142 b and the sliding contacts 106 b and 108 b safe.

As with the embodiments already described the contact pins 142 b first on the conductor wires 145 b clamped and then inserted from below into the housing 12 b.

In the embodiment according to FIGS. 13 to 18, the switch housing 12 b has a chamber between the contact pins a 142 la , which z \ xs a small slima or glow bulb

009828/1197

Illumination of the slide button 59 b can accommodate. In this pail, the sliding button 59 b is preferably made of a clear plastic material, eg Lexan, so that it allows sufficient light to pass through. It is obvious that if an illuminated switch is equipped with a toggle arm, the toggle arm should also preferably be made of a clear synthetic material, or at least a transparent synthetic material. It is obvious that the bulb is connected either to the contact pins 142b or independently are Imsm * In the second pail the connecting wires of the pear are led through small holes in the bottom of the housing 12 b »

The electrical switch according to the invention with sliding contacts is an effective and easy-to-use electrical device that has a long service life with high operational reliability. In addition, the switch according to the invention is easy to assemble and disassemble and ensures good electrical connections for all purposes you automatic machines are connected to the wires before installation in the switch housing, so that the manual connection of the wires with the state of the art contact pins is not necessary.

9828/1197

Claims (1)

EXPECTATIONS C), 1, / Electrical switch with a chamber in a Gen & use and several openings in the housing, which are in communication with the chamber, as well as with a switch contact unit movably arranged in the housing, which has movable contact means protruding into the chamber and a slide button that ü for actuation of the movable contact unit protrudes from the housing, characterized in that prewired contact pins (142) are fastened in the openings (140), protrude into the chamber (102) and so with them. the movable contact means (106, 108) come into engagement that.by moving the slide button (39) in a first direction the movable contact means (106, 108) touch at least one first predetermined contact pin (142) and an electrical connection close, and by moving the slide button (39) in a second direction, the movable contact means (106, 108) touch at least one second predetermined contact pin (142) and close another electrical connection · i 2 "Switch according to claim 1, characterized in that the contact pins (142) are elongated and in their Snap into position; and that the movable contact means (1O6, 108) side surfaces of the contact pins (142) touch. 3 »Switch according to one of Claims 1 or 2 _9, characterized in that each contact pin (142b) a OQSS28 / Ii87 Side wall (16b; 20b) of the housing (12b) rests. 4. Switch according to one of claims 1 to 3, characterized in that each contact pin (142b) has one Body (176), a bent back front end (196) and a rearward-facing contact finger (198) owns; and that the body (176) rests against side walls (16b, 20b) of the housing (12bj. 5. Switch according to claim 4 characterized by of your Body (176) of the contact pins (142b) projecting tabs (194) which are arranged on opposite sides of the con tact fingers (198) in order to prevent undesired deflections of the contact fingers (198). - 6. Switch according to one of claims 1 to 5 dadiireh characterized in that the movable contact means (106b, 108b) with the help of a web-groove connection (170, 172) sliding on an insulating part (100b) of the contact unit (40b) are attached. 7. Switch according to one of claims 1 to 6, characterized in that that see the chamber (102) from an Eade of the housing (12b) extends into the housing and the openings (14Qb) for receiving the Contact pins (142b) from the opposite end of the housing (12b) extend into the housing (12b). 8. Switch according to one of claims 1 to 7 gekennzelehnet by a rocker arm device attached to the housing (12) is attached and has means (66, 68) which are operationally engaged with the slide button (39) * 00 9 828/1197 1J6316S 9. Switch according to one of claims 1 to 8, characterized * that the sliding contacts (106, 108) of the sliding contact unit (40) are U-shaped and one have a first leg (122) and a second leg (124) with a contact plate (136); and that between the first leg (122) and the slide button (39) a rib (128) is arranged such that, during the sliding contacts (106, 108) in or out of engagement moved with the predetermined contact pins (142) are, the sliding contacts (106, 108) around the Swivel rib (128) so that there is always a safe electric cal connection between the sliding contacts (106, 108) and the contact pins (142) is guaranteed. 10. Switch according to claim 9, characterized by that the rib (128) on the first leg (122) of the sliding contacts (106, 108) is formed and after the attachment of the sliding contacts (106, 108) on the slide button (39) rests against the slide button (39).