DE2341545A1 - ELECTRIC CONNECTOR - Google Patents

Description

PATENT LAWYERS

Dr. phiL G. B. HAGEN O ^ / 1 C / Dipl-Phys. W.ΚΑΙΚΟίϊ ^ O ^ IOM-

8000 MONKS 71 {Soil «)
Franz-Hais-Strasse 21
Tel (0811) 796213

Munich, August 11, 1973

AMP Incorporated
Eisenhower Boulevard
Harrisburg, Pa., V. St. A.

Electrical connector

Priority: Aug 22, 1972; V.St.A .; No. 282 823

The invention relates to a single piece Sheet metal stamped and formed electrical connectors with first and second opposing plates extending across a first bracket interconnected and each having first and second slots, each at one end is closed and opens at its other end in a lead-in edge of the plate so that it is one of the wire receptacles serving mouth opening defined, the slots so in Cover lie that an insulated conductor wire in a direction transverse to its axis through the mouth openings can be pressed into both slots, and one slot has a smaller "width than the inner conductor of the Wire so that the edges of the slot penetrate the insulation of the wire and establish an electrical connection with it Cause inner conductors, and wherein the edges of the other slot, which has a greater width than the first slot, in the

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B.tyerisihe Vcrcinshaiik Munich 823 10 t i'oMSfic.k 54782

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Penetrate the insulation sheath of the lead wire and provide strain relief for the electrical connection.

In connectors of the above type, there is often a "considerable Force required to insert the conductor into the slots. and it should be avoided as much as possible on one Base body on which the connector is attached to exert stress, since the base body, e.g. B. a printed one Circuit board, can be relatively fragile.

In a known electrical connector (DT patent application P 19 18 591.2) the bracket connecting the first and second plates extends between the lead-in edges of the connector in such a way that the slots in the bracket open; the end of the first plate remote from the bracket is fastened in or on a suitable base body, while a clearance is left between the free end of the second plate and the base body such that a support part of a wire insertion tool can hook under the free end of the second plate and during insertion of the conductor forms a counter-bearing in order to prevent the insertion forces from being transmitted to the base body.

However, such an arrangement is not entirely satisfactory, the bracket is susceptible to deflection due to forces that act on it during insertion, and since only the second plate is supported, it becomes a part during insertion of the insertion forces transferred to the base body.

According to the invention, an inventor is described in the opening paragraph Type characterized in that it has a third plate which has a third slot serving for strain relief, which · is closed at one end and at the other End in one lead-in edge of the plate opens and a third

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Muzzle opening for wire receiving defined, the third Plate is connected to the first plate via a second bracket and on the side remote from the second plate of the first Plate is arranged, wherein the third slot with the first and second slot is congruent, and that the axes of the first and second bracket extend parallel to the direction of insertion and that the second and third plates are provided with a shoulder which faces away from the lead-in edges.

Since the brackets extend with their axes parallel to the direction of insertion of the wire conductor, they bend during insertion not through, and when the support part of a suitable tool engages the second and third plates to during To create a counter-stop during the insertion process, the insertion force essentially does not act on the first connecting pin and thus transfer the (basic body. This effect is reinforced by the fact that the supported plates are arranged on both sides of the unsupported plate, which is also a far greater stability of the connector wahreiid des Wire insertion process has the consequence.

The connector is particularly suitable for making a branch of an insulated conductor wire between its ends, as the second and third slot for strain relief of the wire conductor on both sides of the contact with the inner conductor Take care of the slot.

A preferred embodiment is characterized in that a connecting pin extends from the first plate away from its lead-in edge extends and that of the second, middle and third plate their insertion ends opposite legs extending spacing the plates from a printed circuit board and defining said shoulders.

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Appropriately, it is seen that the second and third Plate have inwardly beveled sections at their insertion ends on both sides of their slots, which the insulation splitting tips and a control surface for support parts of a tool "form.

This enables a single wire conductor to be automatically separated from a ribbon cable during the insertion process, which consists of a large number of parallel wire conductors, which are interconnected by insulation material Sinti.

The invention also relates to a tool which is used to electrically connect a wire conductor to the terbinder.

In DT-PS 1 955 24.0 of the applicant, a tool is described with which an insulated wire conductor is inserted into a known electrical connector of the type mentioned, consisting of a base body, a piston attached to the base body so that it can be pushed back and forth relative to this , a wire insertion pusher carried by the plunger and a hook-shaped bent support member which is rigidly arranged on the base body and serves to engage the shoulders defined on the connector so that they withstand forces that are applied to the connector during a Wire conductor is inserted into slots in the connector through the plunger while the plunger is displaced relative to the base body towards the connector.

A disadvantage of the known tool is that it is difficult to get the hook-shaped bent support part under the second plate and set the insertion mandrel and wire engaging means precisely with the wire receiving slots of the connector aiffiurieren. Misalignment results in ■ that on the connector body during the insertion process

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an additional force is exerted which adhere to the pole can that the! foot end of the connector experiences a torque. This is particularly disadvantageous when the female end of the first plate of the connector is printed in a relatively faint Circuit board is anchored, which can be weakened as a result in this area.

According to the invention, a tool of the above-mentioned type is characterized which is suitable for use with one according to the invention Connector, in that two hook-shaped support parts are provided which are opposite at their free ends Have control surfaces, which means that when the three ends of the support parts are moved against the lead-in edges Connector plates in the direction of insertion, the free ends of the support parts are first pressed apart resiliently for receiving of the connector between you and then in the snap fit on the shoulders.

In that the support parts are pushed apart when placed on the connector and the connector in a snap fit take up, the Eestlegeschwierheiten that arise with the known tool, avoided. Also take care of the opposite Control surfaces for a compensation effect so that the tool / is guided onto the connector. That's how it is Tool suitable for automatic application to the connector,

In a preferred embodiment of the tool it is provided that the support parts and / or the insertion mandrel are provided with control means, 'which the support parts during the introduction of the wire into the connector slots under the displacement action of the insertion mandrel relative to the support parts carried by the base body to push apart, whereby the support parts be released from the connector.

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This results in an automatic release of the tool from the connector after the insertion operation has been carried out,

In a further preferred embodiment it is provided that cutting means are arranged on the contact holders which are pivotable from a first rest position into the working position, in which they engage under a wire and with the Co-operate insertion mandrel and cut the wire when moving the insertion mandrel relative to the support parts.

In this way, an optional Separation process can be carried out.

An embodiment of a connector according to the invention as well a fiction according to it tool for electrically connecting an insulated wire conductor to the connector is described below described on the basis of the drawing. Show it:

I ¹ Ig. 1 is a top plan view of the connector blank attached to a carrier strip;

Pig, Figure 2 is a perspective view of the finished electrical Connector;

Pig. 3 is a top plan view of the Pig connector. 2 viewed in the direction of arrow 3;

Figure 4 is a cross-sectional view of part of the connector Line 4-4 from Pig. 3 showing an insulation backing plate;

Pig. Figure 5 is a cross-section of a portion of the connector taken along line 5-5 of Pig. 2, with the Inner conductor contact forming plate is shown;

Pig. Figure 6 is a partially cross-sectional side view of the tool;

Pig. 7 is a front view of the tool of JB ¹ Xg. 6, wherein 'for clarity, the parts are pulled apart;

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8 shows a cross section of a front part of the tool in a first working position in which the Connector from the support parts of the gate tool Connection with a wire conductor is added;

FIG. 9 shows a cross section similar to FIG. 8 after electrical connection of a wire conductor with the connector; and

Pig. IO a cross-sectional view along one to the Cut from Pig. 9 vertical axis, the tool shown after a wire cutting process, is.

The contact member 12 has three opposing plates 22, 24, 26, each of which has a wire receiving slot 28, 34, 36, and these slots coincide with each other and open into a lead-in edge of their respective plates and form wire receiving orifices 32, 38j 38. Adjacent ones Sides of plates 22 and 24 or 22 and 26 are integrally connected to one another by brackets, the axes of which are parallel run to the slots, d. H. in the direction of the wire entry, so that the connector is S-shaped in cross-section in the direction of wire insertion. The slot 28 in the middle plate 22 has a slightly smaller width than the inner conductor 47 of an insulated wire 43, so that it penetrates the insulation and compresses the inner conductor and thus effects an electrical connection with the wire when it is transverse to his Axis is pressed into the slot, while the slots 34, 36 in the outer two plates 24, 26 are the wire insulation grip around tind so, -for a strain relief on both sides ensure the electrical connection.

An insulation cutting knife. 16 is at the introductory part of the middle one Plate 22 is formed in that a break line is provided between the contact member 12 and the carrier strip. 14.

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The outer sides 50 of the plate 22 forming contact with the inner conductor are straight and "form relatively massive cantilever spring arms on both arms of the slot 28 forming contact with the inner conductor, while the one with the insulation makes contact forming plates 24, 26 are beveled inwards towards their insertion ends and together with the mouth openings 28 Spitsen 42 define, which penetrate the insulation web 45, which connects parallel strands of ribbon cable to one another, and a Separate each wire conductor from the ribbon cable for insertion and connection. The chamfered sections also form Control surfaces to interact with the insertion tool described below.

A terminal pin 20, which is soldered into an opening in a printed circuit board, extends from the middle ten Plate 22, and short legs 46 extend from the plates serving for strain relief and hold them on one predetermined height above a printed circuit board on which the connector is to be mounted and define shoulders, which support parts of an insertion tool described below attack.

The connector is stamped from sheet metal and is easy to use formed from the die cut that the "plates 24 and 26 in opposite Directions are folded over about their junctions with the middle panel. The semi-finished product can alternatively can also be shaped by an etching process.

An insulated wire conductor may advantageously be inserted into the connector by that shown in Figures 6-10 Hand tool is used.

The tool has a housing body 48 which is in one piece is shaped with a handle 50 and a release lever 52 possesses, which is pivotable by the pivot pin 54 on the

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housing ". An actuating lug 56 is on the release lever in front of companions, and the amount of retraction of the operating nose can be adjusted by means of an adjusting screw 58 »Das Housing 48 is cylindrical with a first and a Ζΐ / eiten Bore 60 "or 62 is formed which has a cylindrical piston 64 record. A helical compression spring 68 surrounds the piston 64 and sits in the larger bore 60 between a flange 66, which is formed at the end of the piston 64, and a shoulder formed at the connecting parts of the bores 60 and 62, thereby biasing the ram in the retracted position.

The front working part of the tool has an ejector element 70, a contact holder 72 and a wire cutter 74. The contact holder 72 is made of elastic plastic and is by means of an internally threaded sleeve 76 on the housing 48 assembled. As in Pig. 7, the front portion of the contact holder 72 is provided with a first bore 80 provided, the diameter of which is sufficiently large to accommodate the piston 64, which has a surface 82, which with a retaining pin 84 disposed in the bore 80 cooperates, causing rotation of the piston 64 relative to the bore 80 is prevented. In addition, the contact holder 72 has a second, third and fourth cylindrical bores 86, 88 and 90 of successively reduced diameter, the wall of the cylindrical bore 88 also being a substantially egg-shaped opening 92 which ends in an open end wire receiving slot 96 which extends through the wall of the Bore 90 extends and contact support fingers 78 defined, the opening 92 forming a region of weakness so that a resilient Bending apart the pinger 78 is possible.

The forward end of the ejector 70 has a reduced diameter for receipt in the bore 88 and is hollowed out, so that it receives an insertion mandrel 110 inside, the

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by, a retaining pin 98 is held therein. The shaft of the The mandrel is provided with control surfaces 116, which during the Relative movement of the mandrel toward the pingers 60 to engage a wire in the connector with shoulders, which are formed adjacent to the front end of the contact holder.

The wire cutter 74 has a partially tubular sleeve with a first bore section 118 for receiving an outer wall part 120 of the contact holder 72. In the wall of the first A pair of slots 122 are formed in the bore portion which receive pivot pins 124 mounted in the outer wall 120, so that the wire cutter 74 can be rotated relative to the contact holder 72 between an operative and a rest position can. A pair of cutting members 126 and 128 extend downwardly from the sleeve of the wire cutter 74, and these Cutting elements are designed identically. Each cutting member 126, 128 has a pair of cutting edges 130 and 132, see above that by rotating the wire cutter 74 either clockwise or counterclockwise selectively aligning one side of the lead wire with the cutting edges.

Like Pig. 8 shows, when the tool is in operation, a wire 112 is positioned in the wire receiving slot 96 in such a way that it rests against the front section of the mandrel 110 which has been completely withdrawn. The free ends of the support members 78 are then applied to the insertion end of the connector and pressure is applied in the direction of insertion which brings the control surfaces 114 into engagement with the beveled outer edges 114 of the electrical connector, thereby forcing the ends of the support members apart so that they snap fit under the shoulders of the connector and thereby prevent displacement of the tool relative to the contact member. It should be noted that the legs 44 and 46 are relative to the tool

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are positioned such that the support members 78, mandrel UO, conductor 112 and slots 28, 34 and 36 all come together are aligned. When the trigger is depressed, the basket 64 causes the mandrel to insert the lead wire into the slots of the Connector uses, the edges of the slots deforming elastically und'den wire and the edges of the middle slot establish electrical contact with the inner conductor while exercising a grinding effect, while upon retraction, the control surfaces 116 engage the mandrel a shoulder defining an upper portion of the slot 96 and spread the elastic pingers 78 laterally, whereby the tool releases the contact member 12 (as FIG. 9 shows).

When the wire cutter 74 is positioned adjacent the mandrel in the operative position, such as Pig. Show 9 or 10 would be the Cut wire prior to insertion into the connector by the interaction between the wire cutter and the insertion mandrel will. The tool can therefore be used to connect an insulated wire or if the wire cutter is is in the rest position to make a branch connection between the wire ends.

It should be noted that the wire could be inserted into the connector by hand or with the aid of other tools. The Slots 28, 34 and 36 can also vary in their width in such a way taper that a wire that is progressively pressed towards the bottom of the slot into the narrowing conical formed slots is compressed more and more.

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Claims (6)

AMP 3199 - * - Claims molded electrical connector with first and second opposing Panels that are connected to one another by a first bracket and each have first and second slots, Clay each of which is closed at one end and opens at its other end into a leading edge of the plate so that he has a mouth opening that serves to receive the wire defined, wherein the slots are so congruent that an insulated conductor wire in a transverse to its axis Direction through the mouth openings in both slots can be depressed, and with one slot a smaller one. Has width than the inner conductor of the wire, so that the edges of the slot penetrate the insulation of the wire and cause an electrical connection to the inner conductor, and wherein the kanteri of the other slot, which is a larger width has as- the first slot to penetrate into the insulation sheath of the lead wire and for strain relief of the electrical Provide connection, characterized in that the connector (12) has a third plate (26) which has a third slot (36) serving for strain relief, which is closed at one end and opens at its other end into a lead-in edge of the plate and defines a third mouth opening for receiving wire, the third plate being connected to the first plate (22) by a second bracket and to that of the second Plate (24) remote side of the first plate (22) is arranged, the third slot (36) with the first and second Slot (28, 34) is congruent, and that the axes of the first and second bracket extend parallel to the direction of insertion and that the second and third plates (24, 26) are provided with a shoulder which faces away from the lead-in edges. 409810/0887 2. Electrical connector according to claim 1, characterized marked that different from the first plate (22) a 'connecting pin (20) extends far from its lead-in edge and that the legs (44, 46) of the second, middle and third rats (24, 26) are opposite to their introductory ends. extending spacing the plates (24, 26) from a printed circuit board and said shoulders form. 3. Electrical connector according to claim 2, characterized characterized in that the second and third plates (24, 26) have their insertion ends on either side of their slots have inwardly beveled sections (40), the tips (42) splitting the insulation and a control surface for support parts (78) form a tool, 4. Tool for inserting an insulated wire conductor into the Slots of an electrical connector according to any one of claims 1-3, having a base body, one on the latter relative to the The base body is mounted so that it can be pushed back and forth, with a wire insertion mandrel carried by the piston and with a hook-shaped support part, which is firmly provided on the base body and with the on the electrical connector defined shoulders engages in such a way that it opposes forces acting on the connector, when a wire is inserted into slots in the connector through the mandrel is, while the mandrel is moved relative to the base body towards the connector, characterized in, that two hook-shaped support parts (78) are provided which have opposite control surfaces (114) at their free ends, as a result of which the free ends are displaced of the support parts (78) against the lead-in edges of the connector plates in Einführrichtxmg the free ends of the support parts (78) 409810/0887 AMP 3199 - J ^ - are first pressed apart resiliently to accommodate the connector (12) between them and then in a snap fit attack the shoulders. 5. Tool according to claim 4, characterized in that the support parts (78) and / or the insertion mandrel (100) are provided with control means (116) which control the supporting parts (78) during the introduction of the wire into the connecting slots (28, 54, 56) under the displacement action of the insertion mandrel (100) relative to the support parts carried by the basic body (48) (78) apart, whereby the support parts (78) are released from the connector (12). 6. Tool according to claim 4 or 5, characterized in that on the contact holders (72) Cutting means (74) are arranged, which can be pivoted from a first rest position into the working position in which they attack under a wire and interact with the insertion mandrel (100) and the wire when the insertion mandrel is displaced (100) to cut relative to the support parts (78). 40 98 10/08 87 Blank page