DE2361442A1 - ELECTRIC COUPLING AND METHOD OF MAKING CONTACT - Google Patents

Description

236 ΊΛ 42

December 7, 1973 Da./K

Gardner-Denver Company
-.- "Quincy, Illinois (V, St." A-.)

"Electrical Coupling and Contact Making Methods · ■ · ■:

The invention relates to an electrical coupling and a method to establish contact.

It is known to have electrical plug connections by means of plugs and make associated couplings, each of the ends

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the live wires of a cable as well as the electrical ones Wear contact element that are connected to the conductor itself of the cable. Such known connectors see the Use of different types of connections or contact elements that are clamped, soldered or otherwise attached to the conductor itself. With certain plug connections the end of the wire is flattened or upset and forms a contact element that has suitable electrical properties and is mechanically strong enough to allow coupling and uncoupling to a coupling counterpart or a To be able to withstand switching element.

A long unsolved problem with such electrical connectors is that there is no electrical Circuit arrangements can be made with electrical connection methods that are readily available in automatic machines can be carried out reliably, quickly and thus economically. For example, such methods can be used in which the use of contact elements or connections that are clamped or soldered to the conductor is only provided difficult to automate because of the slow and complex equipment used to make the connection required are. If these connecting elements are further built into a block, that is one of the two connecting parts is, the repair and replacement of individual contact elements in a multi-pole coupling part are difficult and

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often requires the replacement of the entire clutch. Acquaintance Types of wire connections or contact elements used in electrical Plug connections are usable, also require mostly special tools or special procedures for a repair or replacement, which is maintenance and repair on site and Makes the job difficult or impossible.

In many cases it is therefore desirable to provide a plug connection, the ■ first of a counterpart or a Switching element can be easily solved., The second. Contact elements with good electrical properties, for example a low contact resistance, the third has a repeated Coupling and uncoupling without mechanical failure of the Can withstand contact elements, the fourth as well for simple manual assembly as well as for automated Circuit assembly is suitable, even with very complicated circuits with fast and uncomplicated machines Fifth, easy maintenance and repair of the individual connections ^ a simple or multi-pole Coupling without replacing the entire coupling and without special tools or * replacement parts are possible on the spot and which sixth can easily be brought into various forms, to accommodate a different number of contact elements and to be coupled with a variety of switching elements.

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The invention is based on the object of an electrical To create a connector that has the properties specified above. The invention solves this problem by that the end of a wire as a contact element or as Terminal itself is used without it being significantly deformed, and that it is attached to a separately molded contact device is attached. The coupling according to the invention has a carrier or plug for carrying a wire end, which is shown in it is detachably arranged so that it forms a contact element or a connection for conductive connection with another contact element or switching element. An inventive The plug-and-socket device provides for the use of wires of sufficient strength and ensures good support, so dafj a repeated quick connection and disconnection can be performed.

The invention also provides a method for making contact before, through which certain electrical connections can be made that separable clutch carrier parts or sockets are provided - into which the stripped wire ends can be detachably inserted. With the method according to the invention high-density electrical circuits can be automatically fabricated; separable plug connections can be used for this which have the features enumerated above can be used.

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The invention is explained in more detail below with reference to the drawings. In the drawings show:

Fig. 1 is a perspective diagram in exploded view of an electrical Clutch according to the invention;

FIG. 2 shows a cross section through that shown in FIG Coupling;

Fig. 3 is a section along the line 3-3 in Fig. 2;

Fig. 4 is a view in the direction of arrows 4-4 in Fig. Zj with the cover removed;

5 shows an exploded perspective illustration of a further exemplary embodiment a coupling according to the invention;

FIG. 6 shows a cross section through that shown in FIG Clutch and

Fig. 7 to 15 '

the representation of a method of manufacture an electrical connection, where

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the ends of the conductor releasably with a contact element get connected.

In Figs. 1 to 4, an electrical connector 10 is in the form of an edge connection for the board of a printed one Circuit shown. The connection 10 comprises a carrier of insulating material, for example polyamide or another thermoplastic plastic. The carrier 12 has opposite parallel sides 14 and 16; stand from side 14 a series of spaced parallel integral projections 18; a second row of protrusions 20 is spaced to the projections 18 and arranged parallel to them. The protrusions 18 and 2o serve to carry the ends 22 of a number of cores 24 in such a way that the individual wire ends have contact elements form, which are electrically conductive, but touch the individual wires 26 separable, the Βμΐ of a circuit board 28 is provided are. The circuit board 28 is z.3. Support of a printed circuit or formed in some other way.

The carrier 12 has a number of elongated holes 30. Each These holes 30 have an enlargement 32 (FIG. 2) and a conical recess 34 which opens towards the side 16. As In Fig. 4, each recess 34 is shown by a groove 36 cut, which is molded into the side 16 and is large enough to accommodate the insulated portion 38 of a wire 24

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which is bent at right angles to the end 22, as shown in FIG. The holes 30 are j disposed on the support part 12 so that the portion of them, which extends into the pre jumps 18 and 2o opens to one side 40 of each protrusion 18 and to one side 42 of each projection 20. ^_f: so that then when a wire is inserted into the hole, its end 22 protrudes beyond those sides. Sides 40 and 42 are substantially parallel to one another and together form a protective arrangement for receiving one end of plate 28. Holes 30 are practical in cross-section round and allow an insertion and withdrawal of a wire end without excessive use of force * which would lead to undesired bending of the wire. Usually the holes 30 are larger than the wire diameter, namely at least a few hundredths of a millimeter. The extension 32 of each hole is provided as / clearance to allow easy insertion of each individual wire into the hole in question. The connection 10 further comprises a cover 44, which can also be made of a thermoplastic material. The cover 44 is provided with locks 46 (Figo 1), which with recesses 48 to-

cooperate, which are arranged in the support part 12 ₉ that a snap connection is made between the cover and the support part »This means that the relevant parts are properly aligned and the wires 24 held in the support part as shown in Fig. 2 = The cover 44 can easily be by hand

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can be removed without the carrier part 12 having to be removed from the plate 28 in order to remove and replace individual wires. The cover 44 can also be provided with openings 5o in order to insert a suitable test probe which the relevant Wire ends 22 touched.

According to the illustration in FIG. 3, the wire ends 22 protrude laterally from the surfaces 40 and 42, so that a separable and electrically conductive contact of a wire end with a contact element is made which is formed by the conductor arrangement 26 on the plate 28. The projections 18 and 20 are arranged at such a distance from one another that the carrier 12 with the inserted wires must be attached to the plate 28 with a certain force and the projections are subjected to a slight elastic deflection, creating a clamping effect will. Chamfers 52 are provided at the ends of projections 18 and 20 to facilitate insertion of the panel edge between the spaced rows of projections. The plurality of projections 18 and 20 ensures that the contact element supported by each projection comes into contact with the corresponding wire 26 on the plate 28, regardless of any irregularities in the thickness of the plate. The wires 24 may be tapered or pyramidal tips 54 to facilitate engagement of the coupling 10 with the conductor elements on the plate 28. the

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Wire ends 22 are but practically not changed and are used even as contact elements.

According to the invention provides the connection described above the use of a wire end as a connection or contact element before. Apart from stripping off the insulation and bending the end of the wire as shown in FIG. 2, there is no other operation required to create a port for the connection. Individual wires can be removed and replaced, without the carrier being removed from the plate 28. Furthermore, the connection 10 can be pre-assembled with the wires 24 and then be attached to the plate 28, or the carrier 12 can first be clamped to the plate in the appropriate position whereupon the wires 24 are inserted into the respective holes 30 and finally the attachment of the lid 24 takes place. Accordingly, the connection 10 allows an improved one Circuit assembly method, one of which is a preferred form has been described above.

Another embodiment of a plug connection 60 according to the invention is shown in FIGS. This connection comprises a carrier 62 made of insulating material with overlying parallel sides 64 and 66. Holes 68 arranged parallel at a distance from one another open towards the side 64 and have conical recesses 70 _s which open towards the side 66.

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In the carrier 62 there are grooves 72 which intersect the recesses 70. The carrier 62 has a lock Ik for releasably holding a cover 76 on the carrier 62. The connection 60 is provided for releasably securing flexible wires 78 in such a way that the unstripped ends 80 of the wires sit in the holes 68 of the Page 64 protrude from and form contact elements themselves. The insulated parts 82 of the wires 78 are bent approximately at right angles to the stripped end and sit in the grooves 72. The connecting part 60 is a plug which can form a separable electrical connection with a coupling 84 which contains a number of sleeve-shaped contacts 86. The sleeves 86 are dimensioned so that they receive the wire ends 80 in an electrically conductive manner. The sleeves 86 can be connected to a number of other conductors and can also have the shape shown in FIGS. 5 and 6 with wires 88 releasably inserted in the same manner as the wire ends 80.

The holes 68 and the grooves 72 in the carrier 62, together with the cover 76, ensure adequate support and retention of the wires 78 such that an unsupported portion of the wire end 80 is used as a terminal portion of the joint 60 that needs no further part to form a contact element. It is intended that solid wire with round Cross-section made of copper or an aluminum alloy is used will, with then no problems with bending or regarding

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Wire diameters down to 0.8 mm can be used; while wires are between 0.8mm and 2.0mm in diameter are particularly well suited. -

Although veins are shown in the drawings as having a circular cross-section, flexible conductors having other cross-sectional shapes can readily be used by following the shape of the Conductor receiving holes in supports 12: and 62, respectively is chosen. The stripped ends of the wires of the connector 60 can have a conical or pyramidal tip have in order to facilitate their introduction into the contact elements 86. This type of shaping of the wire ends can be used usual hand tools are carried out, for example with a knife or with hand-operated wire-cutting and stripping tools. Correspondingly, the wire end is also practically changed in connection 60, without the need to provide special contact elements. As with the Connection 10 can also be removed or removed from individual wires without completely separating them from the counterpart or the like. be replaced.

The connectors 10 and 60 can be advantageous in a Contacting method can be used, the one Embodiment is described with reference to FIGS. 7 to 15. This method, which is described in more detail below, provides for automatic positioning devices of the type to be used can be obtained from US patents

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236 ΗΛ2

3 103 735 and 3 185 183 are known, with a modification with regard to the inclusion of wire holding and wire bending devices as described below. As shown in FIGS. 7 to 15, an electrical Contact that is created by terminating the connector 10 or 60 to a flexible wire, using a Positioning device can be produced which includes a wire cutting and stripping device 90. The one shown Cutting and stripping device comprises paired movable knives 92 and 94, each of which Cut insulation from the front or rear of a piece of wire 96. Obtain wire feed means (not shown) a feed of the wire 96 through the cutting and stripping device 90. The wire feed device provides the Wire in an intermediate length from a supply point, for example a reel or the like (not shown). The cutting and stripping device 90 comprises four pyramidal shapes Wire cutting and finishing tools 98 (Fig. 11) carried by a housing 99 and extending radially along it Right-angled cutting axes in the open or closed Position can be moved to create pyramidal ends on the wire.

A positioning device for making contact according to the invention further comprises mutually movable wire holding and

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Wire bending units 100 and 102, respectively. Unit 102 has two movable claws 104 which interact with a sliding finger 106. A bending device 108 that coordinates the Unit 102 is movable, can also relative to the claws To4 and the sliding finger are moved around the wire end 110 according to FIG 7 and 8 to bend. The holding and bending unit 100 is correspondingly with claws 112, a sliding finger 114 and a bending device 116 is provided.

The method according to the invention for making contacts provides that couplings or wire end sockets can be preassembled on a component, for example on the back of the dashboard 120 of a motor vehicle. First, the positioning device moves the Drahthalte- and bent wire unit 100 into a position in a vertical alignment with the connector 10. The unit 102 and the cutting edge = - and Abisolierungsvorrichtung 90 are disposed opposite to the unit 100 so _t that a lead wire 96 in the in- Figure 7 can be advanced. The front end 110 of the wire 96 is stripped and sharpened, in a previous working cycle of the device 90-

According to the illustration in FIG. 8, the wire end is then by moving the flexure 108 at right angles bent downwards to its isolated part, to its end to the

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Introduce a connector, e.g. to prepare the connection 60 in Fig. 14, and to insert the wire end in of the unit 102 when it moves relative to the unit into vertical alignment with the connection 60 in FIG will.

After positioning the wire in relation to the connectors 10 and 60, the wire cutting and stripping device 90 is activated to remove the insulation from rear end of the lead wire 96 and from the front end of the Cut off the next piece of wire to be formed and also cut the wire itself so that the tip 122 is at the rear End is formed. At the same time, the tip is formed at the front end of the next wire.

The insulation at the rear end 124 of the lead wire 96 and at the front end of the next piece of wire to be produced is removed by the cutting and stripping device 90 moved away from the unit 100 and the wire from the cutting and the stripping jig is pulled out as shown in FIG. By actuating the cutting and stripping device 90, the stripped insulation can then be removed removed that between the two stripping blades 92 and 94 remain.

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After moving the cutting and stripping device away from the unit 100, the wire bender becomes 116 moved downward so that it is at the rear end 124 of the wire 96 attacks and this into the position shown in FIG bends. -

The lead wire 96 ″ is thus for introduction into the plug connections 10 and 60 ready. According to FIGS. 14 and 15, the / Holding and bending units 100 and 102 vertically downwards and downwards roughly perpendicular to the direction; moved in which the wire passed through the units TOO and 102 are advanced when the bending devices are brought close to the couplings (Figo 14) migrate the two pairs of claws 104 and 112 apart and the respective push fingers 106 and 114 are set in motion so that they can directly insert the wire ends without further processing push the relevant holes in the connectors 60 and 10. The sliding fingers usually guide the wires until the. insulated part is received by the grooves provided for this in the couplings.

The lids can be put on by hand or by a device Plug connections are put on * Finally brings the Positioning device the units 100 and 102 and the cutting and stripping device 90 back into the in Fig. 7 positions shown, namely over the next hole in the connection 10, for receiving a further wire.

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A new piece of wire is then inserted into units 100 and 102 and the process described is repeated.

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Claims (8)

- 17 claims 1. / Electrical plug connection between one or more flexible lead wires and electrical conductors, characterized by a carrier (12, 62) with holes (30, 68) to accommodate one or more bend ^ - samer lead wires (24, 78), each of which has a non-insulated end (22, 80), the original shape of which is approximately has remained unchanged, for separable and electrical conductive connection with the electrical conductor (26, 86) and by a holding part (44, 76) for the carrier for releasably holding the lead wires therein, such that the lead wires can be inserted into or out of the carrier can be removed or separated from the conductors (26, 86) together with the carrier and the holding part. 2. Plug connection according to claim 1, characterized in that the carrier (12, 62) has grooves (36, 72) which in the holes (30, 86) in the carrier for supporting insulated parts (38, 82) of the lead wires (24, 78) open out approximately at right angles to the stripped ends (22, 80) are bent, the holding part (44, 76) being common with the carrier holds the lead wires in the grooves. - 18- 409839/06 09 3. Plug connection according to claim 2, characterized in that that the holes (68) in the carrier (62) open into an end face (64) of the carrier and the Ends (80) of the lead wires (80) protrude from this end face to form electrical contact elements. 4. Plug connection according to claim 2, characterized in that the carrier (12) is special Has projections (18, 20), the slots for insertion a circuit board (28), at least one of the projections (18) having holes (30) for receiving and for Holding the stripped end (22) of a lead wire (24) in contact with the circuit board (28). 5. Plug connection according to claim 4, characterized in that that the projections (18, 20) are formed elastically deflectable, such that a Clamping effect between the carrier (12) and the circuit board (28) is generated. 6. Method of making contact by means of an insulated flexible conductor wire between two connector parts, which are each set up to accommodate opposite, stripped ends of the conductor wire, the ends of the wire themselves making electrical contact 19-409839 / 0609 2 ^ 61442 ■■■ ", ■■ '." - ■ "■■" ¹⁹ -' ■■. '■'"' ^: form elements, dad urchgeke η η ζ ei c hn et that one end (110) of a conductor wire is prepared by cutting and stripping a certain length of the "insulation, then the wire length is determined, which is necessary to establish a connection by the The end (110) is brought up to a first plug connection part (60), the wire is then placed on a second plug connection part (10), then the lead wire (96) is cut to the predetermined length and the insulation is cut off to a certain length and removed from the other end ( 124) of the conductor wire is stripped, that the ends (110, 124) of the conductor wire (96) is bent approximately at right angles to its insulated part before the introduction of the ^ nden.in the connections, and that the ends (1.10,129) of the conductor wire finally , directly into the compounds (10, 60) introduced without further machining of the end _portions:.: ■ 7. The method according to claim 6, d ad u r c h g e k e η nzeich η e t that at each end (1 ^ 0 »124) of the lead wire (96) a pointed end (122) is formed. 8. The method according to claim 6 and 7, characterized in that the length of a conductor wire (96) is determined in that the first and second ' ^: ' ■ ..- ■ '- .. ■. ■■■■■■■'".- ^.: Ζ '". ■■■■ - -20-; ■ - ^; 409839/0609 ^; - _. ". 236H42 - 20 - ■. Wire holders (102, 100) are provided for holding opposite ends of the lead wire, then one end of a lead wire is advanced into and through the second holder (100) and into the first holder (102), the second holder on the connector (10) sits, then the end (110) is bent to secure it in the first holder (102), then the first holder (102) is moved towards the connector (60), then the lead wire is pulled through the second holder (100) , to the required length by running down
the wire (96) is cut on the side of the second holder from which the lead wire is fed,
and that finally the end (124) is bent to secure it in the second holder (100). 409839/0609 Blank page