EP3859896A1 - Contact socket for a contact carrier insert of a socket - Google Patents

Abstract

Contact socket for a contact carrier insert of a socket, in particular a trailer socket, with a sleeve body (2) formed from a stamped sheet metal part, which has a contact section (3) with a circular cross-section and a connection section (5) providing a flat contact plate (4), with a radial connection section (5) Direction (6) resilient contact sleeve (8) for forming an electrical operative connection with a plug pin (9) provided by a plug, the contact sleeve (8) being held in a secure position by the contact section (3) by means of a bearing seat (10), and with a Spring element (11) which has a contact leg (12) and a spring leg (13), the spring element (11) being designed as a separate component and being arranged on the connection section (5), the spring leg (13) forming a in the direction of the contact section (3) open acute angle (14) is angled towards the contact leg (12), wherein the contact leg (12) has a connecting contour (15) formed by bevels, which positively engages around a mating contour (16) provided by the contact plate (4) for the radial and axial fixing of the spring element (11) with respect to the connection section (5).

Description

The invention relates to a contact socket for a contact carrier insert of a socket, in particular a trailer socket. The invention also relates to a socket with a contact carrier insert equipped with contact sockets.

Sockets in general and trailer sockets in particular are well known per se from the prior art, which is why a separate printed document is basically not required at this point. It is therefore only an example of the DE 20 2007 010 440 U1 referenced, which discloses a socket designed as a trailer socket with a contact carrier insert.

The ones from the DE 20 2007 010 440 U1 known socket has a socket housing that receives a contact carrier insert. The contact carrier insert is used to accommodate electrical contact sockets provided with electrical connection lines. When used as intended, the contact sockets each serve to accommodate a plug pin of a plug inserted into the socket. In the case of a plug pin received in this way by a contact socket, there is an operative electrical connection between the contact socket and the plug pin.

Each contact socket has an opening on the front side which is used to introduce an associated plug pin into the contact socket. On the rear side, that is to say opposite the opening on the front side, the contact socket is electrically connected to an electrical connection line. In the intended use case, a current is carried via the electrical connection line into the respective associated contact socket and into a plug pin received by the contact socket.

Various designs are known from the prior art for the electrical connection of an electrical conductor to a contact socket. For example, the DE 41 02 784 A1 a connection terminal with a housing, a spring element and a contact element. In the intended use, the spring element and the contact element are received by the housing and the The spring element presses the electrical conductor resiliently against the contact element. The advantage of this embodiment is a functional separation between the actual contact element and the spring element provided for pressing the electrical conductor against the contact element.

From the prior art is according to DE 10 2005 014 075 B3 Furthermore, a spring-loaded terminal is known which has a clamping spring arranged in a housing. This clamping spring is bent to form a receiving space and has a longitudinal slot. A slide is arranged movably displaceably within the receiving space surrounded by the clamping spring. The slide is accessible through the longitudinal slot and can be moved longitudinally by means of a correspondingly designed tool, which leads to the arched clamping spring spreading. An electrical contact pinched by the clamping spring can thus be released and released.

Although sockets and / or connection terminals of the type described above have proven themselves in everyday practical use, there is a need for improvement. In particular, there is a constant effort to propose simplified constructions that bring handling advantages. Therefore, based on the prior art described above, the object of the invention is to propose a contact socket and a socket equipped with contact sockets which allow simplified handling with a simultaneously simplified construction.

To solve this problem, the invention proposes a contact socket for a contact carrier insert of a socket, in particular a trailer socket, with a sleeve body formed from a stamped sheet metal part, which has a contact section with a circular cross-section and a connection section providing a flat contact plate, with one in the radial direction Resilient contact sleeve for the formation of an electrical operative connection with a plug pin provided by a plug, the contact sleeve being held securely in position by the contact section by means of a bearing seat, and with a spring element which has a stop leg and a spring leg, the spring element as a separate component is formed and arranged on the connection section, the spring leg being angled towards the contact leg with the formation of an acute angle open in the direction of the contact section, the contact leg having a connection contour formed by a bevel, which for the radial and axial fixing of the spring element with respect to the connection section is one of the contact plate provided mating contour positively engages.

Furthermore, the invention proposes a socket, in particular a trailer socket for the electrical connection of a motor vehicle trailer to a motor vehicle, with a socket housing and a contact carrier insert received therefrom for receiving electrical contact sockets of the type according to the invention provided with electrical connection lines.

The contact socket according to the invention is very simple. It consists of only three parts, namely the sleeve body, the contact sleeve and the spring element. In the intended use, the contact sleeve and the spring element are arranged on the sleeve body and thus form the contact socket according to the invention.

The sleeve body is formed in one piece from a stamped sheet metal part. It provides a contact section on the one hand and a connection section on the other hand. In the intended use, the contact section serves to form an active electrical connection between the contact socket and a plug pin. The contact socket is electrically connected to an electrical conductor by means of the connection section.

The contact section is essentially circular in cross section. This is because connector pins typically provide a contour that is circular in cross section. If a plug pin should have a different geometric configuration, the contact section of the contact socket be designed accordingly adapted. It is crucial that, in the intended use, a plug pin can be inserted into the contact section of the contact socket and that, in this plugged-in state, there is an operative electrical connection between the contact section and the plug pin.

To form a permanent electrical operative connection between the contact section and the plug pin, the contact socket according to the invention has a contact sleeve. This contact sleeve is held securely in position by the contact section by means of a bearing seat. The electrical operative connection between the contact section and the plug pin is therefore formed in the intended use with the interposition of the contact sleeve.

The contact sleeve is designed to be resilient in the radial direction. This has the effect that the contact sleeve presses against the contact section on the inside in the radial direction. In this way, the contact sleeve is secured in position on the one hand in the radial direction and, on the other hand, electrical contact between the contact section and the contact sleeve is permanently ensured. In addition, it is provided that the through opening of the contact sleeve is smaller than the dimension of the connector pin in cross section. This produces a spring-loaded clamping connection between the contact sleeve and the plug pin. The contact sleeve is preferably designed as a lamellar sleeve.

To secure the position of the contact sleeve with respect to the contact section, also in the axial direction, a bearing seat is provided. This ensures, in particular when a plug pin is inserted into the bearing bush, that it does not shift in relation to the contact section in the longitudinal direction of the contact socket, that is to say in the insertion direction of a plug pin. Furthermore, the bearing seat ensures that when a plug pin is pulled out of the contact sleeve, the contact sleeve remains in the contact section and is not pulled out of the contact section together with the plug pin.

A spring element is provided for a clamping arrangement of an electrical conductor on the contact section of the sleeve body. This has a contact leg on the one hand and a spring leg on the other. The spring element is designed overall as a separate component and is arranged on the connection section of the sleeve body. The contact leg of the spring element is used to arrange the spring leg on the contact section, whereas the spring leg is used to arrange an electrical conductor in a clamping manner on the contact section, thereby providing a permanently secure electrical contact between the electrical connection conductor and the contact section.

In the final assembled state, the spring leg is angled towards the contact leg, forming an acute angle that is open in the direction of the contact section. This makes it possible to introduce a connection line (or conductor) to be electrically contacted with the contact socket first at the end into the contact socket. At the moment of insertion, the connecting line presses against the spring element, which is then moved in a resilient manner in the direction of the contact leg. In the gap that opens between the spring element and the contact section, when the connecting line is inserted further, the same threads itself and is clamped by the spring element inside the contact section between the spring limb and the contact section as a result of the restoring force of the spring limb. In a very simple way, it is thus possible for the user to make electrical contact between a contact socket and an electrical connection line.

The contact leg of the spring element is used to arrange the spring element on the contact section. In this case, the contact leg has a connection contour which is formed by a bevel and which positively engages around a mating contour provided by the contact plate for the radial and axial fixing of the spring element with respect to the connection section.

For a secure arrangement of the spring element on the contact section, namely A connection contour provided by the contact leg of the spring element serves both in the radial and in the axial direction. The contact plate of the connection section has a counter-contour designed to correspond to the connection contour. This is at least partially encompassed by the connection contour in the final assembled state, whereby a form-fitting fixing of the spring element on the contact plate of the connection section is given.

The spring element is designed as a separate component to the sleeve body and the contact sleeve. An intended arrangement of the spring element on the sleeve body is possible in a very simple way by bringing the spring element with its connecting contour into operative connection with the counter-contour on the sleeve body side. As a result, a form-fitting connection is formed which fixes the spring element in relation to the connection section of the sleeve body both in the radial and in the axial direction. Overall, this results in assembly that is easy to carry out during manufacture and simple handling by the user in the event of use.

The construction according to the invention allows not only simple assembly during manufacture, but also simple dismantling, for example in the event of repairs. In particular, it is possible to be able to separate an electrical connection line from the contact socket in a simple manner.

It is easily possible to use a suitable tool such as a screwdriver to pivot the spring leg of the spring element against the action of the spring force Allows connecting line from the contact socket in a simple manner. It is thus in a simple manner to equip a contact socket with a connection line and / or a Reuse of the contact socket allows.

According to a further feature of the invention, the connecting contour has two radial sections spaced apart from one another in the radial direction of the sleeve body and two axial sections spaced apart from one another in the axial direction of the sleeve body. In this way, the spring element is secured in position relative to the contact section in a simple manner, the two radial sections securing the position in the radial direction and the two axial sections securing the position in the axial direction.

According to a further feature of the invention, it is provided that a first axial section engages in a slot opening between the contact section and the connection section. There is therefore an axially protruding first section which, in the final assembled state, engages in a slot opening of the sleeve body which is configured to correspond to this. This slot opening is formed between the contact section and the connection section, which structurally provides an at least section-wise separation between the contact section and the connection section. This structural separation makes it possible in a simple manner to make the contact section essentially circular in cross section, whereas the connection section is designed differently from the circular shape in cross section and provides an essentially flat contact plate. The slot opening therefore fulfills two structural requirements. On the one hand, it makes the separation of the contact section and connection section possible in a simple manner to form the flat contact plate, and on the other hand, in the later assembly case, it serves to exclude a first axial section for axially fixing the spring element in relation to the connection section.

According to a further feature of the invention it is provided that a second axial section engages in an opening provided by the contact plate. There are therefore two axial sections, each in an associated Engage opening, wherein the first axial section engages in a slot opening and the second axial section in an opening provided by the contact plate. According to a further feature of the invention, the two axial sections take up a first section of the mounting plate between them in the final assembled state. As a result, the spring element is arranged securely in position in the axial direction with respect to the connection section and thus also with respect to the sleeve body.

According to a further feature of the invention it is provided that a first radial section rests on the inside of the first section of the contact plate in the radial direction of the sleeve body. The first radial section is therefore formed between the two axial sections and, in the final assembled state, rests on the inside of the section of the contact plate which the two axial sections accommodate between them. In this way, the spring element is secured in position in the radial direction outward relative to the sleeve body.

According to a further feature of the invention it is provided that a second radial section rests on the outside in the radial direction of the sleeve body on a second section of the contact plate. A second radial section is therefore provided which, in the final assembled state, rests on the outside of a second section of the contact plate. This ensures that the spring element is positionally secured in the radial direction towards the inside. In combination with the previously described positional securing in the radial direction outwards, an overall positionally secure arrangement is provided in the radial direction.

In the final assembled state, the above-described axial sections engage in the respective associated openings and the above-described radial sections abut the contact plate on the inside or outside, which results in a form-fitting connection. This form-fitting connection enables force to be transmitted both in the axial and in the radial direction, so that the spring element in relation to the sleeve body in both the axial direction and is set in the radial direction.

According to a further feature of the invention it is provided that the first and the second section of the contact plate accommodate the opening provided by the contact plate between them. This configuration enables extremely simple assembly. The spring element is to be guided through the opening provided by the contact plate with its first axial section first, and this at a certain mounting angle. As soon as the spring element is inserted so far that the first axial section reaches the slot opening between the contact section and the connection section, the spring element is to be rotated clockwise, as a result of which the axial sections dip into their respective associated openings with the result that the radial sections with their associated sections of the contact plate come into contact with the plant. As soon as this has taken place, the connecting contour of the spring element and the mating contour of the contact section are in a form-fitting manner, whereby a detachable fixing of the spring element relative to the sleeve body is achieved.

According to a further feature of the invention it is provided that the spring leg adjoins the end of the second radial section of the abutment leg and is guided through a recess in the abutment plate. In the final assembled state, the spring leg comes to rest within the volume space enclosed by the connection section, with the formation of an acute angle open towards the contact section being angled with respect to the contact leg. In the manner already described, this enables the spring leg to be deflected in the direction of the contact leg, so that a clamping arrangement of an electrical connection line between the spring element on the one hand and the opposite inner surface of the connection element on the other hand is made possible.

According to a further feature of the invention, it is provided that the recess is designed as a notch and is open on one side. The one-sided Open notch advantageously enables simplified assembly because there is no need for the spring element to be specially threaded into the recess. In addition, it is provided by means of the notch that the spring element does not protrude on the edge side beyond the connection section, which prevents unintentional detachment of the spring element from the connection section by lifting the spring element at the end.

The spring element is preferably made of steel. The use of X12CrNi177 is particularly preferred. This material has the spring properties that are desirably to be achieved for the application, and this with simultaneous robustness and longevity of the spring element.

Fig. 1

in schematisch perspektivischer Ansicht eine erfindungsgemäße Kontaktbuchse;

Fig. 2

in schematischer Explosionsdarstellung die Kontaktbuchse nach Fig. 1;

Fig. 3

in einer schematischen Schnittdarstellung die Kontaktbuchse nach Fig. 1;

Fig. 4

in schematischer Rückansicht die Kontaktbuchse nach Fig. 1;

Fig. 5

in schematischer Ausschnittsdarstellung teilgeschnitten den Kontaktabschnitt der Kontaktbuchse nach Fig. 1;

Fig. 6

in schematischer Perspektivdarstellung einen Hülsenkörper einer erfindungsgemäßen Kontaktbuchse;

Fig. 7

in schematischer Draufsicht von oben den Hülsenkörper nach Fig. 6;

Fig. 8

in teilgeschnittener Seitenansicht den Hülsenkörper nach Fig. 6;

Fig. 9

in einer Schnittdarstellung den Hülsenkörper nach Fig. 6 gemäß Schnittlinie IX - IX nach Fig. 8;

Fig. 10

in schematischer Perspektivansicht ein Federelement der erfindungsgemäßen Kontaktbuchse;

Fig. 11

in schematischer Seitenansicht das Federelement nach Fig. 10;

Fig. 12

in einer schematischen Draufsicht von oben das Federelement nach Fig. 10;

Fig. 13

in einer ersten schematischen Darstellung einen Kontaktträgereinsatz;

Fig. 14

in einer zweiten schematischen Perspektivdarstellung den Kontaktträgereinsatz nach Fig. 13;

Fig. 15

in einer ersten schematischen Perspektivdarstellung einen Fuß für einen Kontaktträgereinsatz und

Fig. 16

in einer zweiten schematischen Perspektivdarstellung den Fuß nach Fig. 15.

Further features and advantages of the invention emerge from the following description with reference to the figures. Show it

Fig. 1

in a schematic perspective view of a contact socket according to the invention;

Fig. 2

the contact socket after in a schematic exploded view Fig. 1 ;

Fig. 3

in a schematic sectional view of the contact socket Fig. 1 ;

Fig. 4

in a schematic rear view of the contact socket Fig. 1 ;

Fig. 5

in a schematic detail view partially cut through the contact section of the contact socket Fig. 1 ;

Fig. 6

a schematic perspective view of a sleeve body of a contact socket according to the invention;

Fig. 7

in a schematic plan view from above the sleeve body Fig. 6 ;

Fig. 8

in a partially sectioned side view the sleeve body Fig. 6 ;

Fig. 9

the sleeve body in a sectional view Fig. 6 according to section line IX - IX after Fig. 8 ;

Fig. 10

a schematic perspective view of a spring element of the contact socket according to the invention;

Fig. 11

in a schematic side view of the spring element Fig. 10 ;

Fig. 12

in a schematic plan view from above, the spring element according to Fig. 10 ;

Fig. 13

in a first schematic representation, a contact carrier insert;

Fig. 14

in a second schematic perspective illustration the contact carrier insert according to Fig. 13 ;

Fig. 15

in a first schematic perspective illustration a foot for a contact carrier insert and

Fig. 16

in a second schematic perspective view of the foot Fig. 15 .

Fig. 1 shows a schematic perspective view of a contact socket 1 according to the invention.

The contact socket 1 has three components, namely the sleeve body 2, the contact sleeve 8 and the spring element 11. In the final assembled state of the contact socket 1, as shown in FIG Fig. 1 is shown, the spring element 11 and the contact sleeve 8 are arranged on the sleeve body 2. In this final assembled Arrangement, the contact socket 1 is ready for use.

As in particular the exploded view after Fig. 2 can be seen, the sleeve body 2 is designed as a stamped sheet metal part. It has two sections, namely the connection section 5 on the one hand and the contact section 3 on the other hand. The contact section 3 is designed to be essentially circular in cross section, whereas the connection section 5 is designed to differ in cross section from the circular shape and provides an essentially flat contact plate 4.

The connection section 5 is used for the electrical contacting of the contact socket 1 with an electrical connection line not shown in detail in the figures, for example a current-carrying cable in the intended use. The contact section 3, however, in the intended use case, serves to make electrical contact between the contact socket 1 and a plug pin 9 of a plug not shown in detail in the figures, as is shown in particular in the detail view Fig. 5 reveals.

For the electrical contacting of a plug pin 9 with the contact socket 1, the aforementioned contact sleeve 8 is provided, which is received by the contact section 3 in the final assembled state. An electrical contact between the plug pin 9 and the contact section 3 therefore takes place with the contact sleeve 8 interposed.

How the representation especially after the Figures 2 and 3 can be seen, the contact sleeve 8 is slotted. It is therefore resilient in the radial direction, which in the final assembled state ensures that the contact sleeve 8 rests on the inner surface of the contact section 3 with reliable contact. For a secure arrangement of the contact sleeve 8 on the contact section 3 also in the axial direction 7, a bearing seat 10 provided by the contact section 3 is used The terminating edge and on the other end are limited by a stop 28. The stop 28 is designed in a simple manner in that the contact section 3 is at least partially slotted and the end section of a material strip of the contact section 3 provided by such a slit is pressed in radially inward.

For proper assembly, the contact sleeve 8 is to be tapered in the radial direction, i.e. to be made smaller with regard to the cross-section, which is made possible in a simple manner thanks to its slotting. It is then to be introduced into the sleeve body 2 via the open end of the connection section 5 and displaced in the axial direction until the bearing seat 10 is reached. Here, the spring sleeve 8 can expand again in a resilient manner in the radial direction so that it comes to rest on the inner surface of the contact section 3 in the manner already described. As a result of this radial expansion, the contact sleeve 8 also comes into an undercut with the stop 28, so that the contact sleeve 8 is axially fixed between the stop 28 and the terminating edge 29. This axial fixing ensures that axial displacement of the contact sleeve 8 is reliably prevented, even when a plug pin 9 is inserted as intended or when it is pulled out of the contact sleeve 8.

The contact socket 1 also has a spring element 11, as shown in particular in FIG Figures 10 to 12 is shown.

The spring element 11 has a contact leg 12 and a spring leg 13. In the final assembled state, the contact leg 12 and the spring leg 13 enclose an acute angle 14 between them, which is open in the direction of the contact section 3.

The contact leg 12 provides a connecting contour 15. This has two axial sections 17 and 18 and two radial sections 19 and 20 adjoining the first axial section 17 is the first radial section 19, followed by the second axial section 18 and the second radial section 20. In the final assembled state, this connecting contour 15 interacts with a correspondingly designed counter contour 16 of the sleeve body 2, as can be seen in particular from the illustration according to the Figures 6 to 9 results that show the sleeve body 2 in different views.

In the manner already described, the sleeve body 2 has a contact section 3 and a connection section 5. Between these two sections, a slot opening 21 formed by punching is provided, as shown in particular in the plan view Fig. 7 reveals.

Like, in particular, a synopsis of the Figures 8 and 9 shows, the connection section 5 adjoining the contact section 3 is equipped on the top in the radial direction 6 with a contact plate 4 which is essentially flat. This contact plate 4 has two openings, namely a first opening 22 and a second opening which is designed as a recess 27 which is open on one side. A first section 23 of the contact plate 4 is formed between the slot opening 21 and the opening 22. A second section 24 of the contact plate 4 extends between the opening 22 and the recess 27. In addition, the contact plate 4 provides an inside 25 and an outside 26.

In the finally assembled state of the spring element 11, as this can be seen in particular from the illustration Fig. 3 results, the connecting contour 15 of the spring element 11 and the mating contour 16 of the sleeve body 2 are positively interlocked so that the spring element 11 is fixed relative to the sleeve body 2 both in the radial direction 6 and in the axial direction 7.

For the purpose of form-fitting definition of the spring element 11 with respect to the Sleeve body 2, the spring element 11 is to be guided through the opening 22 of the contact plate 4 with its first axial section 17 first. This introduction of the spring element 11 takes place in relation to the connection section 5 at a slight angle at an acute angle. As soon as the spring element 11 is inserted through the opening 22 beyond a certain longitudinal extent, the spring element 11 is to be rotated clockwise. The spring element 11 is to be inserted through the opening 22 to such an extent that the first axial section 17 comes to rest in the slot opening 21 between the contact section 3 and the connection section 5 as a result of the spring element 11 being rotated clockwise. After the first axial section 17 has plunged into the slot opening 21, the spring element 21 is to be rotated further clockwise until the first radial section 19 is on the inside 25 of the first section 23 of the contact plate 4 and the second radial section 20 is on the outside 26 of the second section 24 the contact plate 4 comes to rest. It is then the in Fig. 3 Achieved positioning of the spring element 11, with a form fit between the connecting contour 15 and the mating contour 16, so that a positionally secure arrangement of the spring element 11 on the sleeve body 2 is achieved, by means of the axial sections both in the axial direction and by means of the radial sections 19 and 20 in the radial direction.

In the final assembled position of the spring element 11 after Fig. 3 the spring leg 13 extends through the recess 27 and protrudes into the volume space provided by the connection section 5.

For the purpose of making electrical contact between an electrical conductor and the contact socket 1, the electrical conductor is to be inserted into the contact socket 1 via the opening of the contact socket 1 on the connection section side. As a result of this insertion movement, the spring leg 13 springs in in a twisting movement in a clockwise direction, so that the electrical connection line can be inserted into the gap that opens between the spring leg 13 and the inner surface of the connection section 5. Once the electrical Connection line is introduced in the manner described above, this is due to the resilient clamping of the spring element. 11 clamped between spring element 11 and connecting section 5 in a position-proof and contact-secure manner, with which a proper fixing with respect to the sleeve body 2 is achieved. An electrical connection line clamped in this way can, if necessary, be separated again from the sleeve body 2 by turning the spring leg 13 clockwise using an appropriate tool such as a screwdriver, releasing the electrical connection line against its spring force.

The construction according to the invention proves to be particularly advantageous because it is designed in a simple manner and can therefore also be produced in a simple manner. In addition, handling by the user is comparatively simple, because all that is required to establish electrical contact between the contact socket 1 and the electrical conductor is to introduce the electrical conductor into the contact socket 1 via the connection section 5. In the process, the spring leg 13 swivels automatically in the manner described above, so that when an electrical conductor is introduced, it is also clamped in relation to the connection section 5. In this case, the spring leg 15 is preferably designed to be slightly angled at the end, which in the event of a tensile load on a connecting line helps to reinforce the press fit as a result of the tensile load. The press fit is therefore all the stronger, the higher the tensile load that may be acting on the electrical connection line. In this respect, the design of the spring element according to the invention also acts as a strain relief for a connection line received as intended by the contact socket. In this context, it is also advantageous that the contact socket and electrical connection line can be assembled as intended without tools.

Despite proper clamping of an electrical connection cable together with the strain relief, disassembly is made possible in a simple manner. For this purpose, a correspondingly designed tool is required, which can be inserted into the contact socket on the connection section side. A conventional screwdriver is particularly suitable as such a tool. When inserted, this serves to pivot the spring leg 13 clockwise, creating a gap between the spring leg 13 and the inner surface of the connection section 5, so that a previously installed connection cable can be released from a press fit and pulled out. This makes it possible in a simple manner to equip the contact socket 1 with an electrical connection line and / or to reuse the contact socket 1.

the Figures 13 and 14 each show a schematic perspective representation of a contact carrier insert 30. This contact carrier insert 30 has a plurality of through bores 32, each of which is used to receive a contact socket 1 according to the Figures 1 to 12 serve.

On its rear side 33, the contact carrier insert 30 has connecting means 34 which are used for the detachable arrangement of a terminating element 31 on the contact carrier insert 30.

Such a closing element 31, also called foot, is in the Figures 15 and 16 recognizable from different perspectives.

The closing element 31 has a projection 34 on the front side. In the final assembled state, this engages in a corresponding recess on the rear side 33 of the contact carrier insert 30. The contact carrier insert 30 can, after being fitted with contact sockets 1 including the associated closing element 31, be inserted into the socket housing of a not shown in the figures socket shown are used. <b> Reference signs </b> 1 Contact socket 18th second axial section 2 Sleeve body 19th first radial section 3 Contact section 20th second radial section 4th Attachment plate 21 Slot opening 5 Connection section 22nd opening 6th radial direction 23 first section attachment plate 7th axial direction 24 second section contact plate 8th Contact sleeve 25th inside 9 Connector pin 26th Outside 10 Bearing seat 27 Recess 11 Spring element 28 attack 12th Contact leg 29 Finishing edge 13th Spring legs 30th Contact carrier insert 14th acute angle 31 End element (foot) 15th Connection contour 32 Through hole 16 Counter contour 33 back 17th first axial section 34 head Start

Claims (12)

Contact socket for a contact carrier insert of a socket, in particular a trailer socket, with a sleeve body (2) formed from a stamped sheet metal part, which has a contact section (3) with a circular cross-section and a connection section (5) providing a flat contact plate (4), with a radial connection section (5) Direction (6) resilient contact sleeve (8) for forming an electrical operative connection with a plug pin (9) provided by a plug, the contact sleeve (8) being held in a secure position by the contact section (3) by means of a bearing seat (10), and with a Spring element (11) which has a contact leg (12) and a spring leg (13), wherein the spring element (11) is designed as a separate component and is arranged on the connection section (5), the spring leg (13) forming an in the direction of the contact section (3) open acute angle (14) is angled towards the contact leg (12), wherein the contact leg (12) has a connecting contour (15) formed by bevels, which positively engages around a mating contour (16) provided by the contact plate (4) for the radial and axial fixing of the spring element (11) with respect to the connection section (5). Contact socket according to Claim 1, characterized in that the connecting contour (15) has two radial sections (18, 19) spaced apart from one another in the radial direction (6) of the sleeve body (2) and two axial sections spaced apart from one another in the radial direction (7) of the sleeve body (2) (17, 18). Contact socket according to Claim 2, characterized in that a first axial section (17) engages in a slot opening (21) between the contact section (3) and the connection section (5). Contact socket according to Claim 2 or 3, characterized in that a second axial section (18) engages in an opening (22) provided by the contact plate (4). Contact socket according to one of the preceding claims 2 to 4, characterized in that the two axial sections (17, 18,) accommodate a first section (23) of the contact plate (4) between them. Contact socket according to Claim 5, characterized in that a first radial section (19) rests on the inside against the first section (23) of the connection plate (4) in the radial direction (6) of the sleeve body (2). Contact socket according to Claim 5 or 6, characterized in that a second radial section (20) rests on the outside in the radial direction (6) of the sleeve body (2) on a second section (24) of the connection plate (4). Contact socket according to Claim 6 or 7, characterized in that the first and second sections (23, 24) of the contact plate (4) accommodate the opening (22) provided by the contact plate (4) between them. Contact socket according to one of the preceding claims, characterized in that the spring leg (13) adjoins the end of the second radial section (20) of the contact leg (12) and is guided through a recess (27) in the contact plate (4). Contact socket according to Claim 9, characterized in that the recess (27) is designed as a notch and is open on one side. Contact socket according to one of the preceding claims, characterized in that the spring element (11) is formed from X12CrNi177. Socket, in particular trailer socket for the electrical connection of a motor vehicle trailer to a motor vehicle, with a socket housing and a contact carrier insert received therefrom for receiving electrical contact sockets provided with electrical connection lines, characterized by contact sockets according to one of the preceding claims.

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