DE102017106784B3 - Wire connection device - Google Patents

Abstract

Conductor connection device (1), with a contact element (11) to which a conductor (2) can be plugged and which is designed to contact the conductor (2) in the connected position electrically, wherein the contact element (11) has two contact sections (112) which are movable relative to each other, between them a contact opening (116) for receiving the conductor (2) and each having a cutting edge (115) for penetrating a conductor jacket (201) of the conductor (2), wherein the contact portions (112) between a first position, in which the conductor (2) can be inserted into the contact opening (116) formed between the contact sections (112), and a second position, in which the cutting edges (115) of the contact sections (112) for penetrating the cable jacket (201 ) of the conductor (2) are approximated to each other, are movable, wherein on the contact element (11) arranged clamping element (12) for biasing the contact portions (112) relative to each other is, wherein the clamping element (12) has a receiving portion (121) for receiving a conductor end (20) of the conductor (2) when connecting the conductor (2) to the contact element (11), wherein the clamping element (12) during insertion of the conductor (2) is moved together with the conductor (2) relative to the contact element (11) and thereby the contact portions (112) of the contact element (11) for penetrating the conductor jacket (201) of the conductor (2) are moved towards each other, characterized that the clamping element (12) during insertion of the conductor (2) initially acts on the contact element (11), that the contact portions (112) in the direction of removing the cutting edges (115) are loaded from each other, wherein after a predetermined insertion the effective direction of the Clamping element (12) is reversed and thereby the contact portions (112) in the direction of approaching the cutting edges (115) towards each other are charged.

Description

The invention relates to a conductor connection device according to the preamble of claim 1.

Such a conductor connection device comprises a contact element, to which a conductor is attachable and which is adapted to electrically contact the conductor in the infected position, wherein the contact element has two contact portions which are movable relative to each other, between them form a contact opening for receiving the conductor and each having a cutting edge for penetrating a conductor jacket of the conductor, wherein the contact portions between a first position in which the conductor is insertable in the formed between the contact portions contact opening, and a second position in which the cutting edges of the contact portions for penetrating the conductor jacket of the conductor are approximated, are movable, wherein a arranged on the contact element clamping element for biasing the contact portions is provided relative to each other, wherein the clamping element be a receiving portion for receiving a conductor end of the conductor be has in the attachment of the conductor to the contact element, wherein the clamping element is moved when inserting the conductor together with the conductor relative to the contact element and thereby the contact portions of the contact element for penetrating the conductor jacket of the conductor are moved to each other and is from the WO 99/12233 A1 known.

Such a conductor connection device can for example be arranged on an electrical assembly, for example a printed circuit board, and serve to connect a conductor to the electrical assembly.

Different designs of such Leiteranschlusseinrichtungen are basically known. Thus, in a so-called push-in conductor connection, a stripped conductor end of a conductor is inserted into a clamping point and electrically contacted in this clamping point via a spring and also held mechanically. Such push-in wire connections require prior stripping of the conductor.

In contrast, in a so-called cutting connection, a conductor with an existing cable jacket is introduced into a clamping point and electrically contacted in an actuating step by cutting into the cable jacket with a suitable cutting contact in an electrically contacting manner. In such a cutting connection, a previous stripping of the conductor is not required. However, such a cutting terminal generally requires an additional actuating step for penetrating the conduit jacket by means of a suitable cutting contact.

At one of the DE 198 35 459 C2 known electrical clamp presses an actuating slide a line against a cutting edge of a cutting element when the conductor is attached to the terminal. The actuating slide is locked in a starting position by a locking element. Upon insertion of the conductor into the clamp, the locking element is deflected, thereby releasing the elastically biased slider so that the conductor is pressed into engagement with the cutting element.

At one of the DE 200 00 628 U1 known terminal is a contact element locked in a starting position. Upon insertion of a conductor into an opening of the contact element, the contact element is unlocked so that the conductor is pulled into engagement with a cutting device due to its engagement in the opening.

Other types of cutting contacts using contact elements are for example from DE 203 05 156 U1 , of the DE 698 05 901 T2 , of the DE 20 2015 007 144 U1 , of the WO 2016/079341 A1 , of the US 4 154 497 A , of the US 3,168,615 A , of the US 2012/0 315 785 A1 and the DE 198 51 573 A1 known.

The DE 31 22 303 A1 describes a spring clamp with two clamping parts, which are designed as legs of a one-piece clamping device, each with a wedge-shaped in cross-section and notched cutting terminal edge for stripping contactless and set the conductor and are arranged crossing each other with an acute angle of its end portion.

From the DE 20 48 116 A a device for connecting electrical conductors is known, which has two opposing blades and means for the mutual distance or approach of the relevant knife.

The object of the present invention is to provide a conductor connection device which allows a connection of a conductor in the case of electrical contacting even without prior stripping in a simple, reliable manner.

This object is achieved by an article having the features of claim 1.

Accordingly, when the conductor is inserted, the clamping element initially acts on the contact element in such a way that the contact sections are loaded in the direction of removal of the cutting edges from one another Insertion the direction of action of the clamping element is reversed and thereby the contact portions are loaded in the direction of approaching the cutting edges towards each other.

Cutting edges are thus formed at contact portions of the contact element. The contact portions can be moved against each other, so that the cable jacket of a conductor arranged between the contact portions can be penetrated by cutting the cutting edges in the cable jacket and thereby produce an electrical contact.

Characterized in that two cutting edges are provided on two mutually movable contact portions, a reliable electrical contact can be ensured by penetrating a cable jacket of a conductor. The contact element is elastically resilient in itself and can be adjusted between different positions, so that in a first position, a plugging of the conductor is possible and in a second position, the cutting edges of the contact portions are moved toward each other, so that the cutting edges in the cable jacket of the contact element incise the infected conductor and thus establish an electrical contact.

The contact element comprises, in one embodiment, a base and two first legs extended from the base. At each first leg in this case a contact portion is arranged such that the cutting edges of the contact portions face each other. The first legs extend, for example, parallel to one another, and the contact sections adjoining the first legs are directed toward one another starting from the first legs, so that the contact opening is formed between the contact sections and the cutting edges formed in the region of the contact opening face one another.

In this case, a second limb, by way of which the contact element is connected, for example, in an articulated manner to a housing of the conductor connection device, adjoins each contact section, at an end facing away from the respective first limb. In addition, the base of the contact element may be fastened to the housing, so that the contact element is fixed on the one hand via its base and on the other hand via its second leg to the housing, but via the first legs to the base and via the second legs connected to the housing contact portions can be adjusted in an elastically resilient manner to the housing.

Preferably, the contact element forms with its base, the first legs, the contact portions and the second legs of an 8-shape, with intersecting contact portions which form the contact opening between them and can be moved with their cutting edges against each other, so that the cable jacket of a in the Contact opening inserted conductor penetrated by the cutting edges and thus a conductor of the conductor can be electrically contacted.

The conductor connection device represents a terminal for connecting a conductor, for example, to an electrical assembly, for example a printed circuit board. For this purpose, the contact element is preferably electrically connectable to the electrical assembly, for example via arranged on the base of electrical contact pins, for example, in suitable contact openings a circuit board can intervene.

The contact portions are movable between a first position in which the conductor is insertable into the contact opening formed between the contact portions, and a second position in which the cutting edges of the contact portions for penetrating the conductor jacket of the conductor are approximated to each other. The adjustment between the first position and the second position can in this case be effected automatically upon insertion of a conductor via a contact element arranged on the clamping element, which biases the contact portions of the contact element to each other.

The tensioning element has a receiving portion for receiving a conductor end of the conductor when the conductor is connected to the contact element. If a conductor is plugged into the contact element, the conductor comes with a conductor end into engagement with the receiving portion and thus in operative connection with the clamping element. As a result, when the conductor is inserted further, the clamping element is moved together with the conductor relative to the contact element, so that the contact sections of the contact element are moved out of their first position into the second position and thus electrically contact the conductor of the conductor via the cutting edges becomes.

When the conductor is inserted, the clamping element initially acts on the contact element in such a way that the contact sections are loaded in the direction of removing the cutting edges from one another. Upon insertion of the conductor, the contact portions are thus initially held in a (widened) position to each other, in which the contact opening between the contact portions is so large that the conductor can be moved into the contact opening and through the contact opening. In this first phase of insertion takes place with insulated conductor, no electrical contact, and the cutting edges of the Contact sections are so far apart that the conductor can be moved between them and they do not penetrate into the conductor's conductor jacket.

After a predetermined insertion, however, the effective direction of the clamping element is reversed. By reversing the effective direction of the clamping element, the contact portions are now loaded to each other such that the contact portions are moved toward each other with their cutting edges. The cutting edges thus penetrate into the cable jacket of the conductor and penetrate this to contact a conductor encased in the cable jacket.

By reversing the direction of action of the clamping element, a sudden electrical contacting of the conductor is effected. This has the advantage that the electrical contacting of the conductor takes place in a defined manner after a predetermined insertion path and thus, when the conductor is initially insulated, ensures that premature electrical contacting can not take place with the conductor not yet fully inserted.

In one embodiment, the clamping element, for example, a U-shaped basic shape. Thus, the clamping element may have a transverse section and two clamping legs projecting from the transverse section for acting on the contact element. The clamping legs are, before inserting a conductor, for example, first on the second legs of the contact element and slide, upon insertion of the conductor, along these second legs. By biasing action on these second legs, the contact portions are held in such a position to each other, that the contact opening between the contact portions is widened and the einzusteckende conductor can be inserted through the contact opening. After a predetermined adjustment, the clamping legs slide from the second legs and get into contact with the first legs of the contact element, wherein (eg in crossed, 8-shaped contact element), the contact sections now charged in reverse and thus pressed with their cutting edges to each other, so that the cutting edges cut into the conductor jacket of the conductor in the contact opening and thus electrically contact the line conductor of the conductor.

The clamping legs surround the contact element, for example on the outside. The clamping legs may, for example, have a curved shape and slide, upon adjustment of the clamping element relative to the contact element, on the outside of the contact element along.

By adjusting the clamping element, an electrical contacting can take place by cutting the cutting edges of the contact sections into the cable jacket of the conductor in an automatic manner when a conductor is inserted. For example, to be able to remove the conductor from the conductor connection device, it is possible to provide actuating elements with which the contact sections can be acted upon in order to remove them with their cutting edges and thus eliminate the electrical contacting of the contact sections with the conductor and also to hold the holder Conductor in the conductor connection device. Upon actuation of the actuators, the conductor can be removed from the conductor terminal device, due to the operation, the clamping element can get back to its original position, in turn, the contact portions are held in their first position and thus a re-plugging a conductor to the conductor terminal device is possible ,

• 1 eine perspektivische Ansicht eines ersten Ausführungsbeispiels einer Leiteranschlusseinrichtung;
• 2 die Leiteranschlusseinrichtung in einer Frontalansicht;
• 3A die Ansicht gemäß 2, mit eingezeichneten Schnittlinien;
• 3B eine Schnittansicht entlang der Linie A-A gemäß 3A;
• 3C eine Schnittansicht entlang der Linie B-B gemäß 3A;
• 3D eine vergrößerte Detailansicht in dem in 3B eingezeichneten Ausschnitt;
• 4A eine gesonderte Ansicht des Kontaktelements der Leiteranschlusseinrichtung;
• 4B eine Schnittansicht entlang der Linie C-C gemäß 4A;
• 5 die Leiteranschlusseinrichtung nach Einstecken eines Leiters;
• 6 eine Frontalansicht der Leiteranschlusseinrichtung bei eingestecktem Leiter;
• 7A die Frontalansicht gemäß 6, mit eingezeichneten Schnittlinien;
• 7B eine Schnittansicht entlang der Linie D-D gemäß 7A;
• 7C eine Schnittansicht entlang der Linie E-E gemäß 7A;
• 7D eine Schnittansicht entlang der Linie F-F gemäß 7A;
• 7E eine vergrößerte Detailansicht in dem in 7B eingezeichneten Ausschnitt;
• 8 eine perspektivische Ansicht eines weiteren Ausführungsbeispiels einer Leiteranschlusseinrichtung;
• 9 eine Frontalansicht der Leiteranschlusseinrichtung;
• 10 eine perspektivische Ansicht der Leiteranschlusseinrichtung, bei eingestecktem Leiter; und
• 11 eine Frontalansicht der Leiteranschlusseinrichtung, bei eingestecktem Leiter.

The idea underlying the invention will be explained below with reference to the embodiments illustrated in the figures. Show it:

• 1 a perspective view of a first embodiment of a conductor connection device;
• 2 the conductor terminal device in a frontal view;
• 3A the view according to 2 , with marked cutting lines;
• 3B a sectional view taken along the line AA according to 3A ;
• 3C a sectional view taken along the line BB according to 3A ;
• 3D an enlarged detail view in the in 3B marked section;
• 4A a separate view of the contact element of the conductor connection device;
• 4B a sectional view taken along the line CC according to 4A ;
• 5 the conductor terminal device after insertion of a conductor;
• 6 a front view of the conductor terminal device with inserted conductor;
• 7A the frontal view according to 6 , with marked cutting lines;
• 7B a sectional view taken along the line DD according to 7A ;
• 7C a sectional view taken along the line EE according to 7A ;
• 7D a sectional view taken along the line FF according to 7A ;
• 7E an enlarged detail view in the in 7B marked section;
• 8th a perspective view of another embodiment of a conductor connection device;
• 9 a front view of the conductor terminal device;
• 10 a perspective view of the conductor terminal device, with inserted conductor; and
• 11 a front view of the conductor terminal device, with inserted conductor.

1 to 7A-7E show a first embodiment of a conductor connection device 1 in the form of a terminal, which is a housing 10 and a contact element enclosed therein 11 having. To the case 10 can be a leader 2 along a plug-in direction e be infected so that the conductor 2 through an insertion opening 100 in the case 10 is introduced and inside the case 10 with the contact element 11 electrically contacted.

Like, for example 1 in conjunction with the separate view of the contact element 11 in 4A can be seen, the contact element 11 One Base 110 on that at a bottom of the case 10 is arranged and with protruding contact pins 114 through openings 102 in the bottom of the case 10 reaches through. As schematically in 2 drawn, serve the contact pins 114 to electrically, for example, with a circuit board 3 to contact, so that about the contact element 11 can be connected to an electrical module. By connecting a conductor 2 to the conductor connection device 1 can the leader 2 thus electrically to the circuit board 3 comprehensive assembly to be contacted.

From the base 110 extend, parallel to each other, two first legs 111 , to the contact sections 112 connect. The contact sections 112 extend in a starting position parallel to each other and form between them, as shown in the sectional views of FIG. 3B, 3D and 4B can be seen, a contact opening 116 through which the conductor passes 2 for connection to the conductor connection device 1 to lead is.

To the contact sections 112 close, on of the first thighs 111 distal ends of the contact portions 112 , second leg 113 at the campsites 101 of the housing 10 hinged, so that the contact element 11 on the one hand on the base 110 at the bottom of the case 10 and the other over the thighs 113 at the campsites 101 in the region of the insertion opening 100 at the top of the case 10 is held.

In the area of contact opening 116 have the contact sections 112 one cutting edge each 115 which extends obliquely and face each other and by moving the contact portions 112 can be approximated to each other by a cable jacket 201 one to the conductor terminal device 1 scheduled conductor 2 to penetrate and about a conductor 200 of the leader 2 to contact electrically, as for example in 7B and 7D is shown.

At the contact element 11 is a tensioning element 12 arranged, which is a cross section 120 and to the cross section 120 laterally adjoining legs 122 having. With his instep legs 122 surrounds the clamping element 12 the contact element 11 on the outside and acts to bias on the contact element 12 a, as will be described below.

1 to 4A . 4B show the Leiteranschlusseinrichtung 1 in a starting position at the beginning of an Ansteckvorgangs a conductor 2 , 5 to 7A-7E however, show the Leiteranschlusseinrichtung 1 with completely infected conductor 2 ,

In the starting position ( 1 to 4A . 4B ) takes the clamping element 12 an upper layer inside the housing 10 like this, for example 1 and 2 is apparent. The clamping legs 122 of the clamping element 12 take in this condition with lower leg ends 124 the lower, first thighs 111 of the contact element 11 between them, are with upper leg ends 123 in contact with the second thighs 113 of the contact element 11 and are with the upper leg ends 123 the bearings 101 approximated.

Becomes a leader 2 through the insertion opening 100 through into the housing 10 used, then the conductor arrives 2 , guided by a housing guide 103 in engagement with the between the contact sections 112 formed contact opening 116 and also in engagement with a pot-shaped receiving portion 121 at the cross section 120 of the clamping element 12 (see for example 2 ). The leader 2 is not to be stripped before insertion, so that in the conductor 2 enclosed cable vein 200 through the cable jacket 201 sheathed and thus electrically isolated.

Upon further insertion of the conductor 2 in the insertion direction e in the case 10 is due to the engagement of the conductor end 20 in the recording section 121 , the tensioning element 12 in the insertion e taken. This causes the clamping legs 122 with their upper leg ends 123 on the outside on the second legs 113 of the contact element 11 slide along and the contact sections 112 of the contact element 11 in a direction to remove the cutting edges 115 burden each other. The contact element 11 is thus held in a position in which the contact opening 116 between the contact sections 112 is widened (see 3B and 3D ) and the leader 2 thus (further) through the contact opening 116 can be passed.

The second thighs 113 take, considered in the insertion direction e , to each other a ramp-shaped position. This causes, when driving the clamping element 12 in the insertion direction e the biasing force of the clamping legs 123 on the contact element 11 reinforced and thus the contact sections 112 more and more in the direction of widening the contact opening 116 be biased to each other.

After a predetermined insertion slide the clamping legs 122 like this in 5 to 8A-8E is shown, from the second legs 113 of the contact element 11 off and get into contact with the lower, first thighs 111 of the contact element 11 , Due to the crossed shape of the contact element 11 this reverses the clamping action of the clamping element 12 around, such as, for example, in 5 and 6 shown, the contact sections 112 with their cutting edges 115 in an adjustment V to be moved towards each other and the cutting edges 115 thus in the cable jacket 201 of the leader 2 invade, as in 7B . 7C and 7D is shown. The conductor 200 of the leader 2 is thus electrically contacted and thus electrically connected to the contact element 11 connected.

Due to the slipping of the clamping legs 122 from the second thighs 113 of the contact element 11 and due to the subsequent investment of the clamping legs 122 on the first thighs 111 the clamping direction of the clamping element reverses 12 abruptly and causes the contact sections 112 abruptly in the adjustment V be moved to each other and thus abruptly with the conductor 200 of the leader 2 contact electrically. This is done after a predetermined insertion of the conductor 2 , namely after the tensioning element 12 just been taken so far that the clamping legs 122 from the second thighs 113 of the contact element 11 slide.

The electrical contact is thus in a defined position with fully inserted conductor 2 , Due to the two opposite cutting edges 115 the penetration of the cable jacket takes place 201 Reliable, so a reliable electrical contact with the conductor 2 will be produced.

Should the leader 2 again from the conductor connection device 1 can be solved, actuators 13 on the side of the housing 10 be actuated, whereby the actuators 13 on the contact sections 112 act and this to widen the contact opening 116 move each other. The cutting edges 115 the contact sections 112 are thereby disengaged from the cable jacket 201 brought, so the leader 2 contrary to the insertion direction e out of the case 10 can be pulled out.

Upon actuation of the actuators 13 also become the first thighs 111 moved, due to the wedge-shaped arrangement of the legs 111 to each other (see 6 ) the clamping element 12 due to the tension on the clamping legs 122 contrary to the insertion direction e on the thighs 111 slides upwards and, with sufficient further deflection of the contact sections 112 to each other for releasing the conductor 2 from the conductor connection device 1 , on the second leg 113 slides. If now the operation canceled, the clamping legs 122 on the actuators 13 past further up the second thighs 113 slide so that the clamping element 12 back to the starting position according to 1 to 4A . 4B arrives.

The contact element 11 is preferably in one piece, for example, as a stamped bent part, for example, made of spring steel.

Likewise, the clamping element 12 preferably made in one piece, for example, as a stamped bent part, for example made of spring steel.

8th to 11 show another embodiment of a conductor terminal device 1 , which only with regard to the arrangement of the actuators 13 from the above-described embodiment.

While in the embodiment according to 1 to 7A-7E the actuators 13 on the side of the housing 10 are arranged and for actuating transversely to the insertion direction e in the case 10 are to be pressed, are in the embodiment according to 8th to 11 actuators 13 on the upper ceiling section (in which also the insertion 100 is formed) of the housing 10 arranged and over guide sleeves 104 on the housing 10 guided. Again, the actuators 13 like this 10 and 11 it can be seen, pressed to a ladder 2 from the conductor connection device 1 to solve. To do this, the actuators act 13 on the contact sections 112 and squeeze them together so that the between the contact sections 112 formed contact opening 116 is widened and the leader 2 thus from the contact opening 116 can be moved out.

The idea underlying the invention is not limited to the above-described embodiments, but can in principle also be realized in a different kind way.

A conductor terminal device of the type described here can be used in very different ways for connecting conductors to an electrical assembly. The connection is in this case via a contact element having cutting edges and thus allows connecting a non-stripped conductor.

LIST OF REFERENCE NUMBERS

1

Wire connection device

10

casing

100

insertion

101

depository

102

opening

103

housing guide

104

guide sleeve

11

Contact element (contact metal)

110

Base

111

Lower thigh

112

Contact section

113

Upper thigh

114

pin

115

cutting edge

116

contact opening

12

Clamping element (overspring)

120

cross section

121

receiving portion

122

clamping leg

123, 124

leg end

13

jig

2

ladder

20

conductor end

200

cable core

201

cable sheath

3

Assembly (printed circuit board)

e

insertion

V

adjustment

Claims (9)

Conductor connection device (1), with a contact element (11) to which a conductor (2) can be plugged and which is designed to contact the conductor (2) in the connected position electrically, wherein the contact element (11) has two contact sections (112) which are movable relative to each other, between them a contact opening (116) for receiving the conductor (2) and each having a cutting edge (115) for penetrating a conductor jacket (201) of the conductor (2), wherein the contact portions (112) between a first position, in which the conductor (2) can be inserted into the contact opening (116) formed between the contact sections (112), and a second position, in which the cutting edges (115) of the contact sections (112) for penetrating the cable jacket (201 ) of the conductor (2) are approximated to each other, are movable, wherein on the contact element (11) arranged clamping element (12) for biasing the contact portions (112) relative to each other is, wherein the clamping element (12) has a receiving portion (121) for receiving a conductor end (20) of the conductor (2) when connecting the conductor (2) to the contact element (11), wherein the clamping element (12) during insertion of the conductor (2) is moved together with the conductor (2) relative to the contact element (11) and thereby the contact portions (112) of the contact element (11) for penetrating the conductor jacket (201) of the conductor (2) are moved towards each other, characterized that the clamping element (12) during insertion of the conductor (2) initially acts on the contact element (11), that the contact portions (112) in the direction of removing the cutting edges (115) are loaded from each other, wherein after a predetermined insertion the effective direction of the Clamping element (12) is reversed and thereby the contact portions (112) in the direction of approaching the cutting edges (115) towards each other are charged. Conductor connection device (1) according to Claim 1 , characterized in that the contact element (11) has a base (110) and two first legs (111) extending from the base (110), one of the contact sections (112) adjoining each first leg (111). Conductor connection device (1) according to Claim 2 characterized in that the cutting edges (115) of the contact portions (112) face each other. Conductor connection device (1) according to Claim 2 or 3 , characterized in that at each contact portion (112), a second leg (113) connects, which is connected to a housing (10) of the conductor connection device (1). Conductor connection device (1) according to Claim 4 , characterized in that the base (110) of the contact element (11) is fixed to the housing (10). Conductor connection device (1) according to one of Claims 2 to 5 , characterized in that the base (110) comprises at least one contact pin (114) for electrically connecting the contact element (11) with an electrical assembly (3). Conductor connection device (1) according to one of Claims 1 to 6 , characterized in that the clamping element (12) has a transverse section (120) and two of the transverse section (120) projecting clamping leg (122) for acting on the contact element (12). Conductor connection device (1) according to Claim 7 , characterized in that the clamping legs (122) engage around the contact element (11). Conductor connection device (1) according to one of the preceding claims, characterized by actuating elements (13) for removing the cutting edges (115) of the contact sections (112) from each other for releasing the conductor (2) from the contact element (11).

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