DE2427215A1 - TOOL FOR CONNECTING INSULATED LADDERS TO CONNECTOR CONTACTS - Google Patents

Description

DIPL.-ING. A. GRÜNECKER 8000 MÖNCHEN 22

DR.-ING. H. KINKELDEY Moximilion Flower 43

Telephone (38 11) 22 28 62 (4 lines) DR.-ING. W. STOCKMAIR ₁ Ae. E. ccauf .nstoftechn) Tileg.omm. ./.ο.,οραΙ Munich PATENT LAWYERS DR. K. SCK '"" ^ * "~'" ~. - "»; .T-XKO 3 Telex 0S-2938>,

5th June 1974

BUNKER RAMO CORP.
900 Commerce Drive, Oak Brook, Illinois 60521, USA

Tool for connecting insulated conductors to connector contacts

The invention relates to a tool for connecting a conductor sheathed with insulation at a contact.

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Bank accounts: H. Aufhäuser, Munich 173533 Deutsche Bank, Munich 16/25078 Post check account Munich 46212-801 Bank code 70030600 bank code 700 70010 bank code 700 100 80

The most varied types of multi-pole electrical can be found in communications and data processing Use connectors. For connecting individual conductor wires or strands to such a connector the end of the conductor is usually stripped and then soldered to a contact of the connector. This method requires considerable skill in making the solder joint, in particular if it is a miniature connector. There is also the risk of bridging adjacent contacts of the connector, so that undesired circuit connections result.

In another method, which is becoming increasingly widespread, one v / ends connector contacts with the Cutting through the insulation formed connection parts. Ask when cutting through the insulation such connecting parts establish a conductive connection with the conductor without the latter being stripped or soldered for this purpose needs to become. The connecting parts are usually fork-shaped and have cutting edges to cut through the insulation, which then simultaneously act as contact jaws to produce the conductive Serve connection with the conductor. A forked part of the connector contact also serves to cut through the insulation and to establish the electrical connection.

There is no need to insert the individual conductors into the contacts of a connector designed in this way special tools, but only an ordinary screwdriver or the like .. There is then however, there is a risk that this work will be carried out very unevenly. If you apply too little pressure, it is important the conductor is not deep enough so that the electrical and mechanical connection is inadequate. At arrival ' Turning excessive pressure runs the risk of

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the insulation is crushed or the conductor breaks. Insertion of the screwdriver too deep or appropriate tool can bend or damage the cutting through the insulation result in certain parts of the contact. Also, one such method of connecting the conductors is still quite time-consuming and cumbersome, so that the advantages over soldered-on contacts the contacts cutting through the insulation do not come into their own.

The invention is based on the object of creating a tool by means of which individual conductors can be securely, Connect accurately and evenly to contacts of a connector designed to cut through the insulation without the difficulties mentioned above.

According to the invention, a tool is as mentioned in the opening paragraph Type characterized in that the contact is a connector in the form of an elongated channel with one designed to receive the free end of the conductor End and at least one connecting web with an outwardly open notch for cutting through the insulation of the conductor at a point remote from its free end and establishing a conductive connection therewith, that the connector has an outwardly open, resilient retaining mouth for retaining the conductor at the other end of the connection part comprises that a hold-down device for attaching near the free end of the conductor and exerting a holding pressure on this is provided for holding down its free end in one end piece of the channel-shaped connecting part, and that a pressure web aligned with the hold-down device for pressing the conductor into the channel-shaped connecting part, in the notch of the connecting web, which is designed for cutting through the insulation, and is provided in the retaining mouth of the connector is.

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By means of the tool according to the invention, the individual conductors at a predetermined depth in the connection parts of the contacts and in each case one assigned to them, Retaining jaw used to relieve strain on the conductor without crushing the insulation of the conductors or cutting through the insulation damage certain parts of the contacts.

In an advantageous embodiment, the invention provides a tool for simultaneously connecting a larger number of conductors on a number of adjacent contacts of a multi-pole connector. Such a tool is preferably designed so that it is after connecting the conductor to a solid Part of the ready-to-use connector. In this case the tool then forms a protective cover for the connecting parts, for the parts of the conductors which are seated in these and for the retaining jaws of the connector .

Preferably the tool further includes a forked one Guide part which engages around the conductor at one point directly on the retaining jaw in order to introduce it into it. In addition, the tool in the preferred embodiment has at least one protruding laterally to the pressure web Stop part, which is used to limit the depth of penetration of the pressure web into the channel-shaped connecting part can be placed on a surface of the connector.

In the following, exemplary embodiments of the invention are explained with reference to the drawing. Show it:

Fig. 1 is an oblique view, represented in section, of a contact seated in an electrical connector and a tool for inserting a conductor into the contact according to a first embodiment the invention,

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FIG. 2 is a somewhat enlarged view in section along the line 2-2 in FIG. 1;

3A shows a partial view of the end face of the tool according to Fig. 1,

3B shows a partial side view of the tool,

3C is a plan view of the connecting part of a connector contact; into which the tool can be inserted during use,

JD shows a view of the tool from below,

FIG. 4- a drawn on the same scale as FIG Top view of part of a connector socket with a connector part of a seated therein the insulation cutting connector contact for which that shown in Figs. 1-3 Tool is usable,

Figure 5 is a side view of one for use with the tool of Fig. 1 to 3 certain complete Connector, but without housing,

Fig. 6 is a plan view of the connector approximately along the line 6-6 in Fig. 5 »

7 is a view of the connector from below, roughly corresponding the line 7-7 in Fig. 5 »

Fig. 8 is a view of a connector in section approximately along the line 8-8 in Fig. 5 with two tools .according to a second embodiment of the invention,

FIG. 9 is a front view of one of those shown in FIG. 8 Tools,

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Fig. ΊΟ an end view of the tool roughly corresponding the line 10-10 in Fig. 9,

FIG. 11 shows an end view of the tool roughly corresponding to line 11-11 in FIG. 9,

FIG. 12 shows a view of the tool from below roughly corresponding to line 12-12 in FIG. 9>

Figure 13 is a sectional view taken along line 13-15 in Fig. 9,

FIG. 14 is a reduced side view of the in FIG. 5 shown connector with a detachable tool attached to it,

15 is a partial view of a connector having a as a holder for the tools attached to this slide-on housing and

16 shows an end view of the fully assembled connector approximately in the direction of arrows 16, 16 in Fig. 15.

In Figs. 1 to 8, a basic version is one with Connector parts for cutting through the insulation of a conductor having Eontakten equipped electrical Connector 30 shown, and in Figs. 1 to 3 also a tool that can be used for connecting individual conductors 80 according to a first embodiment of the invention. The connector 30 as a whole is shown in FIGS. 5-8 and details thereof in Figs. 1-4. The connector 30 includes one made of an insulating material molded contact socket 31 ntLt a number of individual Contact holders 32. As shown in Figs. 1, 5 and 8 recognizes, the contact holders 32 extend completely through the socket 31. In the Contact holders 32 of the socket 31 is a corresponding "

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Number of contacts 33 used. These each have an actual contact part 34- in the form of a thin, resilient metal tongue, the end 35 of which is bent back in the shape of a hook is and in a narrow retaining slot 36 in the Socket 31 at one end of the contact holder 32 receptacle finds. Furthermore, the contacts 33 each have a one-piece connection part 37, which near the outer end sits in the respective contact holder 32 (Fig. 4 ·, 5, 8). The connector 30 is in a socket connector 40 shown in dashed lines in FIG. 5 can be used. The latter can be the same Contains contacts 33 as the connector 30, so that the tools according to the invention in the same way are used for the plug part and the socket part of an electrical connection. The in Fig. 5 to The connector 30 shown contains a total of fifty contacts 33. However, this number is dependent on that of the connections to be established in a wide range changeable.

As far as described so far and shown in FIGS. 5 to 7 the construction of connector 30 is essentially the same as that described in US Pat. No. 3,002,176 multipolar connector. The individual contacts can be quickly and easily inserted into the socket insert by pushing them into the individual holders 32 from the front, i.e. from the left in FIG. In the US-PS cited above, the connection parts of the contacts are formed in the shape of a channel. The connection of the conductors to the individual contacts

takes place in the conventional way by soldering. In the case of the use of the tool according to the invention However, soldering is not necessary for certain contacts 33. For this purpose they have each integrally formed from a piece of thin, conductive sheet metal contacts 33 training for the unsoldered connection of an isolated electrical

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Conductor by cutting the insulation when pushing in of such a conductor in the connection part of the respective contact.

In Fig. 1, 2 and 4 is a possible embodiment of the am outer end of the individual contacts 33 seated connecting part 37 shown in large enlargement. In this context, the term "outer end" refers to a contact or a contact holder the fit is the end to which the individual conductors are or will be connected. These The relationship does not change even if the connector 30 is designed so that the terminal parts 37 of the contacts 33 do not extend as an extension of their contact parts 34-.

The outer end piece of a contact 33, designed as a connecting part 37, has the shape of an elongated, U-shaped cross-section having a channel with a bottom 51 and side walls 52 and 53 · One with the side wall 53 of the channel one-piece retaining tab 4-9 is in Fig. 1 is shown angled approximately at right angles to the side wall 53. In this state you can insert the contact 33 into the insulating socket 31. After that, the retaining flap 4-9 is then set up to to hold the contact 33 in the holder 32. If the contact 33 is somewhat tightly fitted into the holder, the tab 49 can, however, also in the remain in the position shown in FIG.

The connecting part 37 of the contact 33 contains two connecting webs 54 and 55. The web 54 is formed from two web parts punched out of the side walls 52 and 53, which are angled towards one another at the end of the channel representing the connecting part 37 and an upwardly open notch 56 form. The top of the notch 56 has downwardly converging sharp edges

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Tapes for cutting the insulation surrounding an electrical conductor. In the middle part of the notch the thickness of the bounding edges increases steadily, so that here a transition area to push apart the insulation of a conductor inserted into the notch is formed. The lower part of the notch 56 is preferred bounded by smooth, rounded edges, which slightly divergent pressure jaws for attack form an electrical conductor.

The second connecting web 55 of the connecting part 37 is similar the first web 54- formed. He sits out two punched out of the side walls 52 and 53 of the channel and together to form angled web parts. The bridge parts have beveled, sharp ones upper edges and are bent back on themselves in the lower part, so that they are like the parts of the web 54 · a notch 58 having a portion for cutting the insulation, a transition area and a contact area form.

To connect an electrical conductor 61 covered with an insulation 62 to the connecting part 37, the Head, as shown in Figures 2 and 4, into the two Notches 56 and 58 of the connecting webs 54 and 55 are pressed in. When the insulated conductor is pressed into the notches, their converging edges cut them insulation 62 surrounding it. As the conductor continues downward in notches 54- and 56, Their steadily increasing edges push the insulation apart, around the one underneath Expose conductor 61. Finally, there are the rounded or bent back edges in the lower part Area of the notch in sliding contact with the conductor and practice one normal to its axis Pressure on him without cutting into the conductor. Fig. 2 shows the final position of the

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the insulation 62 surrounded conductor 61 in the connecting web after completion of the electrical connection. The conductor occupies the same position in the connecting web 54-. The connector 30 has a number of retaining lugs formed in one piece with the insulating mount 31 for the strain relief of the connections. As can be seen in FIGS. 1, 2, 4, 5 and 7, a wall 71 integral with the socket 31 extends transversely over the outer ends of all contact holders 32. In the wall 71 there are a number of narrow ones which diverge towards the open outside Einführechlitζen 72 formed, one of which is aligned with the outer end of a contact holder 32 and merges into this. At the inner end, the slots 72 each merge into an enlarged recess 7 ^ , the inner diameter of which is approximately equal to the outer diameter of the insulation 62 surrounding the conductor 61. An extension 76 of each of the individual slots grants access to the connecting webs 54 and 35 of the connecting part 37. The width of the extended slot 76 is preferably not significantly less than the full diameter of the insulation 62 surrounding the conductor 61 (FIG. 2).

When inserting an insulated conductor through the elongated slot 76 into the connector 37 one of the contacts 33 is the conductor at the same time through the insertion slot 72 in the widened Holding recess 75 pressed and then held in this. When the conductor is pressed in, they bend Walls of the slot 72 apart somewhat and the insulation 62 of the conductor 61 is somewhat compressed. However, these parts then spring back into their relaxed position.

In Figs. 1, 2, 3A, 3B and 3D, a tool 80 is in a simplified basic embodiment of the invention shown. The tool 80 is used for pressing in each case

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a single insulated conductor 61 in the connection part 37 of a contact 33 and in the associated holding mouth formed from the insertion slot 72 and the enlarged recess 75. The tool 80, for example made of steel in this embodiment, has a downwardly protruding hold-down device 81 near one end of its underside. A pressure web 82 extends from this in the direction of the outer end of the tool. The part of the pressure web 82 adjoining the hold-down device 81 has the same width as this. That width is just slightly smaller than that? Total diameter of the insulated conductor. The outer end piece 83 of the pressure web 82 is somewhat narrower, so that it can be easily inserted into the insertion slot 72 of the retaining mouth. At the outer end, the tool has a forked guide part 84 which is just wide enough to encompass the insulation 62 of the conductor 61 on both sides. The pressure web 82 can have a downwardly protruding nose 86 in the middle part, which can be inserted between the connecting webs 54 and 55 in the connecting part 37 in order to press the insulated conductor between the connecting webs onto the bottom of the one forming the connecting part.

To connect the insulated conductor 61, this is in the manner shown in dashed lines in Fig. 1 with his free end inserted into the inner end of the connecting part 37 of a contact 33. The tool is on it 80 in dashed lines in FIG. 1 and in FIGS. 3B to 3D Aligned manner shown on the contact holder 32 and the contact 33 located therein and then moved downwards, wherein the forked guide member 84 engages on the protruding over the outer end of the socket 31 part of the insulated conductor 61 to it on the connector 37 of the contact 33 and on the Insertion slot 72 of the elastic retaining mouth aligned to keep.

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Grip as the tool continues downward the hold-down 81 and the protruding nose 86 on the pressure web at the inner end or the space between the webs 54 and 55 of the connecting part 37 opposite points of the conductor 61. The hold-down 81 exerts a holding pressure on the isolated Conductor 61 to hold its free end in the inner end of the connecting part 37. The tool is then moved further down into the end position shown in Fig. 2, the pressure web 82, 83 den insulated conductor 61 pushes into the groove of the connection part 37 and into the insertion slot 72 of the retaining mouth. Towards the end of the downward movement of the tool 80, the pressure bar presses the conductor into the cut through the insulation determined notches 56 and 58 of the connecting webs 54 or 55 and thus represents the desired conductive connection between the conductor 61 and the contact 33. Simultaneously with this becomes the outer part of the insulated conductor pressed into the enlarged recess of the retaining jaw, so that this firmly holds the conductor seizes and holds in its connection position. Provided that the tool 80 with the bottom of the pressure bar protruding nose 86 is provided, this presses the conductor in the space between the connecting webs 54 and 55 on the bottom of the connector low.

When using the tool 80, the insulated conductor 61 cannot come out of the trough-shaped connector of the contact 33 slip out, but is constantly guided safely during the establishment of the connection. When making the connection, the insulation the conductor is not excessively deformed or crushed. The permanent deformation of the insulation remains in the essential to the cutting and forcing apart at the in the notches of the connecting webs 54- and 55 pressed places. Fig. 2 shows

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the completed electric hiscr? -üi? in the area of the connecting web 55 · At the points where the hold-down 81 and the nose 86 touch down, a slight, limited deformation of the insulation can occur. When the conductor is pushed in through the insertion slot 72, the insulation is compressed somewhat. However, this deformation is not excessive and does not affect the tight fit of the insulated conductor in the widened part 75 of the retaining mouth. Since the externally protruding part of the conductor 61 is held continuously between the legs of the forked guide part 84 when it is pressed in, it is not or only slightly bent, depending on the dimensions of the guide part 84, so that there is no risk of the insulation breaking off or peeling off.

When the conductor 61 is pressed into the holding mouth 72, 75 and the connecting part 37, the tool 80 finally sets with two on both sides of the pressure web 82, 83 existing Steps 87, 88 on surface parts 91, 92 of the mount 31 on both sides of the slots 72, 76. As a result of this placement, the depth of penetration of the tool 80 is reliably limited (FIG. 2). This is then guaranteed 'that individual conductors 61 are each completely pressed into the respective connecting part 37 and retaining mouth 75 without damaging the insulation 62 outside the notches 56 and 58 in the connecting flanges will. Damage to the connecting webs 54, 55 is also excluded.

9 "to 16 show another embodiment of the Invention in which a larger number of connection tools are combined in one insert 180. The use 180 serves to connect the conductors 61 of a complete row to the connector 30 at the same time, the insert then becoming part of the fully assembled connector. The structure of the mission 180 is best seen in FIGS. 8-12.

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The insert 180 is preferably molded in one piece from plastic. He assigns one of the contacts in a row of the connector on the corresponding number of hold-down clamps (Fig. 12, 13) · These are identical to one another Distances and the same orientation as the terminal parts 37 of the contacts 33 of the connector 30. In extension the individual hold-downs 181 each run a pressure web 182, which is then in a narrower web part 183 passes. Furthermore, additional pressure lugs 181A corresponding to the parts 86 of the tool 80 can be provided be. On the outer hand of the insert 180, the narrower parts 183 of the pressure webs 182 each go into a recess, which forms a forked guide part 184 (FIGS. 9, 13) - the insert 180 thus has an integral series of tools which are substantially the same shape as the single tool 80 in the first embodiment of the invention.

At one end of the insert 180 there is a first Laltearm 185 in the middle of the relevant narrow side downwards. At the other end "of the insert 180 there is a second holding arm 186 on which the guide parts 184 opposite end of the relevant narrow side (Fig. 9, 10, 11).

Thanks to the staggered arrangement of the holding arms 185 »186 it is possible, using a single mold, to form pairs of inserts, which are mutually exclusive can be used for a connector equipped with two rows of contacts.

When assembling or connecting the conductors 61 to the connector 30, two inserts 180A and 180B in FIG the manner shown in Fig. 8 aligned with the terminal parts 37 of the two rows of contacts of the connector. To push in all the conductors 61 at the same time

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into the connection parts 37 of one row of contacts of the connector 30 then becomes the insert 180A from the one shown in FIG. 8 position shown downwards or the insert 180B pushed upwards. When pressing the inserts 180A, 180B to the The hold-down devices 181 place the holder 31 of the connector 30 of the individual tools that are integral with the insert on the inner end piece of the respectively assigned Conductor 61 and hold it with its free end in the inner end of the connecting part 37 of the respective Contact 33 firmly. The pressure web 182 aligned on the respective conductor pushes it into the channel-shaped one Connection part, in the notches of the connecting webs seated therein and in the extension of the outer end of the Contact formed holding mouth. During these operations, the outer parts of the individual conductors 61 are respectively between the legs of the associated guide parts 184-held and are in cooperation with these in the respective holding jaw pressed.

In Pig. 15 and 16 is the one using the inserts 180A and 180B ready assembled connectors 30 represent posed. The retaining arms 185 and 186 of the insert 180A are snapped into place on the opposite edge of the socket 31. In the same way, the retaining arms 185 and 186 of the other insert 180B are locked so that they each next to the relevant holding arm of the insert 180A. Thanks to her in terms of the breadth of the Inserts in an asymmetrical arrangement form the holding arms 185 and 186 of the two inserts 180A and 180B a simple and safe anchorage for the inserts after they have done their job, the individual ladder 61 to introduce evenly and safely into the connecting parts of the connector contacts, have fulfilled.

The holding arms 185, 186 of the inserts each have a bevel 190 at their free ends 189, thanks which you can use when pressing the inserts on the

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can slide freely along opposite sides of the connector socket. the Inserts 180A and 180B are not just for connecting the conductor 61 on the connector 50, but subsequently form a cover for the connecting parts 37 and the conductor parts pressed into them (FIGS. 8, 14-16).

An additional housing 188 in In the direction of the arrow A in FIG. 15, the two inserts 180A and 180B can be pushed onto them more secure to hold on to the connector. You can do it Also use housing 188 to press inserts 180A, 180B onto and into the connector. For this purpose, the two inserts are pressed into the connector socket 31 at one end, whereupon the housing 188 is pushed on from this end, so that the inserts the individual conductors 61 one after the other press into the socket.

As seen in Fig. 14, the overall dimensions are shown of the connector 30 through the inserts 180 no appreciable enlargement. The stakes 180 can each be molded in one piece from a plastic. They allow a considerable time saving when assembling or connecting a connector, in particular a connector with a larger number of conductor connections. Using the tool bits 180, large numbers of ladders can be removed in a matter of minutes to a connector by inserting the individual conductor ends into the corresponding connection parts of the Introduces contacts and then the two inserts as described above and shown in FIGS. 14-16 squeezes. As in the first embodiment of the tool 80, the pressure webs 182 are used on both sides of the insert 180 formed steps to limit the depth of penetration of the webs in the connecting parts and in the retaining jaws of the connector, so that a safe

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electrical connection ensured, damage to contacts and crushing or injury the conductor insulation are excluded.

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Claims (12)

Claims tool for connecting a conductor sheathed with insulation to a contact of a connector, characterized in that the contact has a connecting part in the form of an elongated groove one end designed to receive the free end of the conductor and at least one connecting web an outwardly open notch for cutting the insulation of the conductor at one of its free ends remote location and making a conductive connection therewith comprises that the connector is an outward open, resilient retaining mouth for holding the conductor at the other end of the connecting part that a hold-down device (81) for placing near the free end of the conductor (61) and exerting a holding pressure this to hold down its free end in one end piece of the channel-shaped connecting part (37) it is provided that a pressure web (82, 83) aligned with the hold-down device for pressing the conductor into the Trough-shaped connecting part, in the notch (56, 58) of the designed for cutting through the insulation (62) Connecting web (54, 55) and in the retaining lug (72, 75) of the connector (30) is provided. 2. Tool according to claim 1, characterized by at least one stop part (87, 88) for limiting the depth of penetration of the pressure web (82, 83) into the channel-shaped connecting part (37) « 3 · Tool according to claim 1 or 2 for use with a connector in which the retaining mouth is formed in one piece with a socket formed from insulating material 409882/0342 is and one aligned with the trough-shaped connecting part having a narrow insertion slot, characterized in that there are two opposite one another Sides of the pressure bar (82, 83) protruding steps (87> 88), which is close to limiting the depth of penetration of the pressure web into the channel-shaped connecting part (37) the insertion slot (72) on outer surface parts of the connector socket (31) can be attached. 4. Tool according to at least one of claims 1 "to 3» for use with a connector having a contact socket formed from insulating material which has a narrow insertion slot for the retaining mouth and a wider slot aligned with this above the connecting web of the connecting part, characterized in that the pressure web of the tool (80) a narrow retaining mouth insertion section (83) and a with this aligned wider connecting web insertion section (82). ' 5. Tool according to at least one of claims 1 to 4, identified by an insertion guide (84) for embracing the conductor at a point directly adjoining the retaining mouth (72, 75) and for inserting the Ladder into the holding mouth. 6. Tool according to at least one of claims 1 to 5> ge mark ze.i chn e t by a second hold-down device (86), the two hold-down devices (81, 86) against " the conductor rest on opposite sides of the connecting web (55) in the connecting part. 409882/0342 7. Tool according to at least one of claims 1 to 6, characterized marked eichnet that it a plurality of hold-down devices (181), a corresponding number of pressure webs (182, 183) and a corresponding one Number of insertion guides (184), that the connector has multiple contacts, and that multiple conductors can be connected at the same time by an insert tool. 8. Tool according to claim 7 »characterized in that the insert tool (180) facilities (185ί 186) for attaching the same to the connector (30). 9. Tool according to claim 7 or 8, characterized in that the devices for Attaching the insert tool to a pair of opposing ends of the connector (30) engaging Represent holding arms (185, 186) each having a beveled free end (189, 190), see above that the holding arms of two insert tools provided on the connector do not interfere with the attachment of the same, and that the insert tool provides a secure holder or cover for a number of connected to the connector Represents ladders (61). 10. · Tool according to at least one of claims to 9, characterized in that it with an insulating fitting (31) of the connector containing the contacts (33) of a connector (30) is connectable. 11. Tool according to at least one of claims to 10, characterized in that it is molded in one piece from plastic. 409882/0342 12. Tool according to at least one of claims 7 to 11, characterized in that the hold-down devices (181) and pressure webs (182, 183) are in one piece are formed with a retaining wall, which is a cover for cutting through the insulation (62) formed notches (56,58) and forms for the ladder parts inserted therein. 409882/0342 Blank page