Contact element

Abstract

A contact element for inserting a mating contact element along an insertion direction. The contact element includes an insertion opening for inserting the mating contact element and at least one contact lamella for electrically contacting the mating contact element, and a clamping sleeve that is displaceable along the insertion direction, relative to the at least one contact lamella, between a first position and a second position. The clamping sleeve and the contact lamella are in an operational relationship with one another such that when the clamping sleeve moves from the first position into the second position, the contact lamella is moved in a radial direction perpendicular to the insertion direction. The clamping sleeve includes a run-up element, which in a projection along the insertion direction through the insertion opening at least partially covers the insertion opening.

Claims

1. A contact element for inserting a mating contact element along an insertion direction, the contact element comprising: an insertion opening for inserting the mating contact element; at least one contact lamella configured to electrically contact the mating contact element; and a clamping sleeve that is displaceable, along the insertion direction, relative to the at least one contact lamella, between a first position and a second position, the clamping sleeve and the at least one contact lamella being in an operational relationship with one another in such a way that when the clamping sleeve moves from the first position into the second position, the at least one contact lamella is moved radially inwardly, perpendicular to the insertion direction, the clamping sleeve including a run-up element, which in a projection along the insertion direction through the insertion opening, at least partially covers the insertion opening, so that upon insertion of the mating contact element into the contact element, the mating contact element strikes the run-up element, and upon further insertion of the mating contact element, the clamping sleeve is moved in the direction of the second position with the aid of the run-up element, wherein: the contact element includes, at the clamping sleeve, a first retaining element that prevents a displacement of the clamping sleeve from the first position in the direction of the second position when no mating contact element is inserted into the contact element; and the first retaining element is in operative connection with the run-up element such that, due to the operative connection, a deformation of the run-up element occurs with a deflection of the first retaining element.

2. The contact element as recited in claim 1, wherein the first retaining element is a protrusion that extends radially from a surface of the clamping sleeve in a direction away from a center of the clamping sleeve outwards towards an exterior of the contact element.

3. The contact element as recited in claim 1, wherein a second retaining element, which is different than the first contact element, is provided at the clamping sleeve, the second retaining element preventing a displacement of the clamping sleeve from the second position in the direction of the first position when the clamping sleeve is in the second position.

4. The contact element as recited in claim 1, wherein the first retaining element also prevents a displacement of the clamping sleeve from the second position in the direction of the first position when the clamping sleeve is in the second position.

5. The contact element as recited in claim 1, wherein a detent lance, which is elastically reversibly deflectable, is provided at the contact element for locking the contact element in a contact chamber of a plug connector.

6. The contact element as recited in claim 1, wherein: the run-up element is deflectable by a pressure exerted by the mating contact element on the run-up element in the insertion direction with a continued insertion force after the mating contact element abuts against the run-up element; an angle of an extension of the run-up element relative to the insertion direction changes by the deflection from being at a first angle value to being at a second angle value; and the first retaining element is connected to the run-up element so that, with the deflection of the run-up element, the first retaining element shifts, in a first radial direction, radially out of a retaining slot from a first radial position to a second radial position, thereby freeing the clamping sleeve to be able to have the displacement of the clamping sleeve from the first position in the direction of the second position.

7. The contact element as recited in claim 6, wherein, when the clamping sleeve is at the second position, the angle of extension of the run-up element is again at the first angle value, and the first retaining element is again at the first radial position.

8. The contact element as recited in claim 6, wherein the slot is formed in the at least one contact lamella.

9. The contact element as recited in claim 1, wherein the clamping sleeve includes: a first section in which the inner surface of the clamping sleeve extends obliquely relative to the insertion direction so that, in the first section, a diameter of the clamping sleeve decreases opposite to the insertion direction; and a second section that does not extend obliquely relative to the insertion direction with a decreasing diameter opposite to the insertion direction and that is more distal than the first section from the receiving end of the clamping sleeve at which the mating contact element enters into the clamping sleeve.

10. The contact element as recited in claim 1, wherein the clamping sleeve includes: a first section in which the inner surface of the clamping sleeve extends obliquely relative to the insertion direction so that, in the first section, a diameter of the clamping sleeve decreases opposite to the insertion direction; and a second section in which the inner surface of the clamping sleeve extends parallel to the insertion direction so that the diameter of the clamping sleeve remains constant in the second section, the clamping sleeve and the at least one contact lamella being arranged relative to each other such that, when the clamping sleeve is in motion from the first position to the second position, the surface of the at least one contact lamella slides against the inner surface of the clamping sleeve in the first section causing the radially inward movement of the at least one contact lamella, and such that, when the clamping sleeve is in the second position, the surface of the at least one contact lamella is pressed outwardly against the inner surface of the clamping sleeve in the second section.

11. The contact element as recited in claim 1, wherein, when the clamping sleeve is in the first position, first retaining element performs a locking function that locks the clamping sleeve against being displaced from the first position in the direction of the second position when no mating contact element is inserted into the contact element.

12. A contact arrangement, comprising: a contact element for inserting a mating contact element along an insertion direction, the contact element including: an insertion opening for inserting the mating contact element; at least one contact lamella configured to electrically contact the mating contact element; and a clamping sleeve that is displaceable, along the insertion direction, relative to the at least one contact lamella, between a first position and a second position, the clamping sleeve and the at least one contact lamella being in an operational relationship with one another in such a way that when the clamping sleeve moves from the first position into the second position, the at least one contact lamella is moved radially inwardly, perpendicular to the insertion direction, the clamping sleeve including a run-up element, which in a projection along the insertion direction through the insertion opening, at least partially covers the insertion opening, so that upon insertion of the mating contact element into the contact element, the mating contact element strikes the run-up element, and upon further insertion of the mating contact element, the clamping sleeve is moved in the direction of the second position with the aid of the run-up element; the mating contact element inserted into the contact element along the insertion direction; wherein: the contact element includes, at the clamping sleeve, a first retaining element that prevents a displacement of the clamping sleeve from the first position in the direction of the second position when no mating contact element is inserted into the contact element; and the first retaining element is in operative connection with the run-up element such that, due to the operative connection, a deformation of the run-up element occurs with a deflection of the first retaining element.

13. The contact arrangement as recited in claim 12, wherein the at least one contact lamella does not contact the mating contact element, at least as long as the mating contact element does not strike the run-up element, when the mating contact element is inserted into the contact element along the insertion direction.

14. The contact arrangement as recited in claim 12, wherein the at least one contact lamella rests against the mating contact element with a defined force transverse to the insertion direction when the clamping sleeve is in the second position.

15. A plug connector, comprising: a housing with a contact chamber; a contact element situated in the contact chamber, the contact element being locked in the contact chamber, the contact element configured for inserting a mating contact element along an insertion direction, the contact element including: an insertion opening for inserting the mating contact element; at least one contact lamella configured to electrically contact the mating contact element; and a clamping sleeve that is displaceable, along the insertion direction, relative to the at least one contact lamella, between a first position and a second position, the clamping sleeve and the at least one contact lamella being in an operational relationship with one another in such a way that when the clamping sleeve moves from the first position into the second position, the at least one contact lamella is moved radially inwardly, perpendicular to the insertion direction, the clamping sleeve including a run-up element, which in a projection along the insertion direction through the insertion opening, at least partially covers the insertion opening, so that upon insertion of the mating contact element into the contact element, the mating contact element strikes the run-up element, and upon further insertion of the mating contact element, the clamping sleeve is moved in the direction of the second position with the aid of the run-up element; wherein: the contact element includes, at the clamping sleeve, a first retaining element that prevents a displacement of the clamping sleeve from the first position in the direction of the second position when no mating contact element is inserted into the contact element; and the first retaining element is in operative connection with the run-up element such that, due to the operative connection, a deformation of the run-up element occurs with a deflection of the first retaining element.

16. A plug connector arrangement, comprising: a plug connector including: a housing with a contact chamber; a contact element situated in the contact chamber, the contact element being locked in the contact chamber, the contact element configured for inserting a mating contact element along an insertion direction, the contact element including: an insertion opening for inserting the mating contact element; at least one contact lamella configured to electrically contact the mating contact element; and a clamping sleeve that is displaceable, along the insertion direction, relative to the at least one contact lamella, between a first position and a second position, the clamping sleeve and the at least one contact lamella being in an operational relationship with one another in such a way that when the clamping sleeve moves from the first position into the second position, the at least one contact lamella is moved radially inwardly, perpendicular to the insertion direction, the clamping sleeve including a run-up element, which in a projection along the insertion direction through the insertion opening, at least partially covers the insertion opening, so that upon insertion of the mating contact element into the contact element, the mating contact element strikes the run-up element, and upon further insertion of the mating contact element, the clamping sleeve is moved in the direction of the second position with the aid of the run-up element; and a mating plug connector including: a mating plug connector housing; and the mating contact element; wherein: in a completely plugged-together state of the plug connector and the mating plug connector, the clamping sleeve is moved into the second position with the aid of the mating contact element, the at least one contact lamella resting against the mating contact element with a defined force transverse to the insertion direction; the contact element includes, at the clamping sleeve, a first retaining element that prevents a displacement of the clamping sleeve from the first position in the direction of the second position when no mating contact element is inserted into the contact element; and the first retaining element is in operative connection with the run-up element such that, due to the operative connection, a deformation of the run-up element occurs with a deflection of the first retaining element.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further features and advantages of the present invention will become apparent to those skilled in the art from the following description of exemplary specific embodiments with reference to the figures, which, however, are not to be construed as limiting to the present invention.

(2) FIG. 1 shows a schematic cross section of a plug connector arrangement, in accordance with an example embodiment of the present invention.

(3) FIG. 2A shows a schematic cross section of a contact element with a clamping sleeve in the first position, in accordance with an example embodiment of the present invention.

(4) FIG. 2B shows a schematic cross section of the contact element from FIG. 2A with an inserted mating contact element in the final insertion position, and the clamping sleeve in the second position, in accordance with an example embodiment of the present invention.

(5) FIG. 3A shows a schematic cross section of a further contact element with a clamping sleeve in the first position, in accordance with an example embodiment of the present invention.

(6) FIG. 3B shows a schematic cross section of the contact element from FIG. 3A, in which a mating contact element is inserted and is just striking a run-up element of the contact element, the clamping sleeve still being in the first position;

(7) FIG. 3c shows a schematic cross section of the contact element from FIGS. 3A and 3B with an inserted mating contact element in the final insertion position, and the clamping sleeve in the second position.

DETAILED DESCRIPTION OF EXAMPLE EMBODIMENTS

(8) FIG. 1 shows a schematic cross section of a plug connector arrangement 100. Plug connector arrangement 100 includes a plug connector 50, and a mating plug connector 60 that may be plugged together with plug connector 50.

(9) Plug connector 50 includes a housing 51 with a contact chamber 52, and a contact element 1 that is situated in contact chamber 52.

(10) Mating plug connector 60 includes a mating plug connector housing 61, having a cup-like design here, and a mating contact element 62 that is situated in mating plug connector housing 61. Mating contact element 62 may be designed in the form of a flat contact blade or a pin or an annular contact, for example. Situated at a side of mating plug connector housing 61 facing plug connector 50 is a radial seal 63, which in the plugged-together state of plug connector 50 and mating plug connector 60 seals off the shared inner space of plug connector arrangement 100 from the penetration of dirt and moisture.

(11) Contact element 1 is suitable for inserting mating contact element 62 along an insertion direction E. Contact element 1 includes an insertion opening 2 for inserting mating contact element 62. Contact element 1 also includes at least one contact lamella 3 for electrically contacting mating contact element 62. Two contact lamellae 3 are discernible in the cross section in FIG. 1. However, in principle exactly one contact lamella 3 or more than two contact lamellae 3 may be provided. Contact element 1 also includes a clamping sleeve 4 that is displaceable along insertion direction E, relative to the at least one contact lamella 3, between a first position P1 and a second position P2. Clamping sleeve 4 and the at least one contact lamella 3 are in an operational relationship with one another in such a way that when clamping sleeve 4 moves from first position P1 into second position P2, the at least one contact lamella 3 is moved in a radial direction R perpendicular to insertion direction E, in particular radially inwardly. Clamping sleeve 4 includes a run-up element 5, which in a projection along insertion direction E through insertion opening 2 at least partially covers insertion opening 2, so that upon insertion of mating contact element 62 into contact element 1, mating contact element 62 strikes run-up element 5 (cf. FIGS. 2B, 3B, and 3C), and upon further insertion of mating contact element 62, clamping sleeve 4 is moved in the direction of second position P2 with the aid of run-up element 5.

(12) Clamping sleeve 4 may be made of sheet metal, for example. Run-up element 5 may be radially inwardly bent here, for example, and may protrude in the manner of a shield into the insertion path of mating contact element 62.

(13) In FIG. 1, insertion opening 2 is provided by an opening in housing 51 of plug connector 50. From the standpoint of contact element 1 alone, insertion opening 2 may thus be provided by the front end of the at least one contact lamella 3 (FIGS. 2A through 3C).

(14) Clamping sleeve 4 includes an obliquely, radially inwardly extending first section 7 in a front area 6 facing mating contact element 62. In the front area, a diameter D of clamping sleeve 4 decreases from a first diameter D1 to a second diameter D2.

(15) A second section 8 that extends essentially in parallel to insertion direction E adjoins first section 7 of clamping sleeve 4, viewed opposite insertion direction E. Diameter D of clamping sleeve 4 is constant in this second section 8; in present FIG. 1, this is second diameter D2.

(16) Clamping sleeve 4 may, for example, be captively fixed to contact element 1 and may at the same time be displaceable. For this purpose, for example a link structure that predefines the possible displacement path of clamping sleeve 4 may be provided at contact element 1.

(17) Contact element 1 in FIG. 1 includes a contact box 35 that surrounds contact lamellae 3. Contact lamellae 3 may, for example, be cut free from contact box 35. However, contact box 35 may also be designed as a box into which contact lamellae 3 are pushed or folded. At lower contact lamella 3 in FIG. 1, a front contact area 30 is adjoined, viewed along insertion direction E, by a middle section 31, which is adjoined by a fastening section 32 for fastening an electrical line or a cable 40. Cable 40 includes an electrical conductor 42, and insulation 41 that surrounds conductor 42. By way of example, an insulation crimp 37 and a line crimp 38 are provided here in fastening section 32 (each schematically illustrated in dashed lines), other types of fastening (for example, soldering, welding, etc.) also being possible. Insulation 41 of the cable in fastening section 32 is fixed via insulation crimp 37, and electrical conductor 42 is mechanically fastened and electrically connected to contact element 1 via line crimp 38.

(18) An obliquely outwardly protruding, for example elastically reversibly deflectable, detent lance 9 is situated at contact box 35. This detent lance 9 may engage with a housing undercut 53 of housing 51 of plug connector 50, so that contact element 1 is captively situated in contact chamber 52 of housing 51, and is then locked in contact chamber 52. It is understood that an inverse arrangement is also possible; i.e., an undercut situated at contact element 1 engages with a housing detent lance situated at housing 51.

(19) It is understood that contact box 35 may also be formed by the two contact lamellae 3. Likewise, detent lance 9 may be cut free from a contact lamella 3.

(20) A combination of contact element 1 and mating contact element 62 may also be referred to as a contact arrangement 70, in particular when mating contact element 62 is inserted into contact element 1.

(21) In the completely plugged-together state of plug connector 50 and mating plug connector 60, not illustrated in FIG. 1, clamping sleeve 4 is moved into second position P2 with the aid of mating contact element 62. The at least one contact lamella 3 may then rest against mating contact element 62 with a defined force transverse to insertion direction E.

(22) It is clearly apparent in FIG. 1 that contact lamellae 3 are spaced apart from mating contact element 62 in radial direction R as long as clamping sleeve 4 is in first position P1. The insertion of mating contact element 62 into contact element 1 may thus take place largely free of force, and in particular no force is necessary to press contact lamellae 3 outwardly. The so-called peck up force peak, which otherwise results in a high initial insertion force, advantageously does not apply.

(23) In addition to insertion direction E, radial direction R as well as a circumferential direction U circumferentially surrounding the insertion direction are indicated in FIG. 1 to facilitate orientation.

(24) FIG. 2A shows a simplified schematic cross section of a contact element 1 with clamping sleeve 4 in first position P1. Detent lance 9 has been omitted here for reasons of clarity. Mating contact element 62 is still in front of insertion opening 2 or is just passing through same. Insertion opening 2 is defined here by the front end of contact lamellae 3. Mating contact element 62 is thus situated at the beginning of the insertion path and thus at the start of a defined length L of the insertion path. This insertion path is ended here when mating contact element 62 is completely inserted, i.e., is in a final insertion position.

(25) FIG. 2A illustrates contact element 1 without a contact box 35 surrounding contact lamellae 3. However, in principle the box formed by contact lamellae 3 could also be regarded as a contact box 35.

(26) FIG. 2B shows a schematic cross section of contact element 1 from FIG. 2A, with inserted mating contact element 62 in the final insertion position and clamping sleeve 4 in second position P2.

(27) It is clearly apparent that during the insertion operation, mating contact element 62 with its free end 64 or with its tip has struck run-up element 5 after approximately 75% of defined length L of the insertion path. Upon further insertion, run-up element 5 has entrained or carried clamping sleeve 4 along the insertion path, and thus moved the clamping sleeve relative to contact lamellae 3 from first position P1 into second position P2. Run-up element 5 and clamping sleeve 4 are in operative connection for example, for example due to a relatively rigid coupling or in such a way that run-up element 5 is only slightly tilted relative to its rest position when mating contact element 62 strikes run-up element 5.

(28) Due to the displacement of clamping sleeve 4 into second position P2, contact lamellae 3 strike an inner wall of clamping sleeve 4 in its first section 7, in which diameter D of clamping sleeve 4 decreases. As a result, contact lamellae 3 are deflected radially inwardly and thus pressed against mating contact element 62 toward the end of the insertion path. Shortly before the end of defined length L of the insertion path, diameter D of the clamping sleeve thus remains constant in its second section 8, so that the contact force that results likewise remains constant.

(29) FIG. 3A shows a schematic cross section of a further contact element 1 with clamping sleeve 4 in first position P1. Here as well, detent lance 9 is not illustrated for reasons of clarity. Contact element 1 from FIG. 3A differs from that in FIG. 2A, in that a first retaining element 10 and a second retaining element 20 are formed or situated or provided at clamping sleeve 4.

(30) FIGS. 3B and 3C show contact element 1 from FIG. 3A upon further insertion of mating contact element 62 along various sections of defined length L of the insertion path.

(31) FIG. 3B shows a state in which mating contact element 62 is inserted into contact element 1 and is just striking run-up element 5 of contact element 1, clamping sleeve 4 still being in first position P1.

(32) FIG. 3C then shows contact element 1 with inserted mating contact element 62 in the final insertion position and with clamping sleeve 4 in second position P2.

(33) First retaining element 10 is designed as a type of detent hook. This detent hook engages behind a first undercut 15 of contact box 35 when or as long as clamping sleeve 4 is in first position P1. First retaining element 10 thus prevents an inadvertent displacement of clamping sleeve 4 from first position P1 in the direction of second position P2 when no mating contact element 62 is inserted into contact element 1. It is apparent from FIG. 3A that first retaining element 10 is in operative connection with run-up element 5. In FIG. 3A, first retaining element 10, which is designed as a detent hook strictly by way of example, is designed, for example, in one piece with run-up element 5. The first retaining element protrudes from run-up element 5 approximately in parallel to insertion direction E in the direction of insertion opening 2, the detent hook being formed at the free end of first retaining element 10 and protruding radially outwardly.

(34) Second retaining element 20 is provided to prevent a displacement of clamping sleeve 4 from second position P2 in the direction of first position P1 when clamping sleeve 4 is in second position P2 (cf. FIG. 3C in this regard).

(35) Second retaining element 20 is present in duplicate here. First, in FIG. 3A a radially inwardly directed detent hook is formed at the lower part of clamping sleeve 4, at its end facing away from insertion opening 2. This detent hook may be formed, for example, by folding over clamping sleeve 4 radially inwardly. As a complement thereto, in FIG. 3A at lower contact lamella 3, a second recess 25 is provided in the area of second position P2, into which this second retaining element 20, designed as a detent hook, may engage when the clamping sleeve has reached second position P2 (FIG. 3C).

(36) As is apparent in FIGS. 3A and 3C, in this specific embodiment first retaining element 10 is simultaneously used, strictly by way of example, also as second retaining element 20. Upon striking by mating contact element 62, run-up element 5 may have been elastically reversibly deflected in the manner of a spring in the direction of insertion direction E. As soon as first retaining element 10, situated between upper contact lamella 3 in FIG. 3A and mating contact element 62, has passed an end of contact lamella 3 facing away from insertion opening 2 and the application of force by mating contact element 62 decreases, run-up element 5 may spring back into its rest position (FIG. 3C). In this way, the detent hook of first retaining element 10 may engage behind the end of upper contact lamella 3 in FIG. 3A, and may thus prevent an inadvertent reverse displacement of clamping sleeve 4 from second position P2 into first position P1. First retaining element 10 may thus also simultaneously have a double function here, the same as with second retaining element 20.

(37) It is understood that there may also be specific embodiments in which only a single retaining element 10, 20 having a double function is provided. However, there may also be specific embodiments in which each retaining element is used either only as a first retaining element 10 or only as a second retaining element 20.

(38) FIG. 3B shows that run-up element 5 is tilted slightly along insertion direction E due to being struck by mating contact element 62. First retaining element 10 designed as a detent hook is thus released. This is because the detent hook tilts out of first undercut 15. As a result, clamping sleeve 4 may be displaced from first position P1 in the direction of second position P2 by the further movement of mating contact element 62 along insertion direction E.

(39) To remove mating contact element 62 from contact element 1, for example for maintenance purposes, clamping sleeve 4 may be moved from second position P2 into first position P1, as the result of which contact lamellae 3 are released from front area 6 of the clamping sleeve and spring radially outwardly. They are thus removed or detached from mating contact element 62, and may subsequently be removed from contact element 1 (essentially) free of force. When the clamping sleeve is moved from second position P2 into first position P1, mating contact element 62 may, for example, already be carried along in the direction of the insertion opening with the aid of run-up element 5.

(40) For contact elements 1 that include a second retaining element 20, the second retaining element is preferably to be unlocked or released prior to the displacement of clamping sleeve 4 from second position P2 into first position P1. This may take place with the aid of an unlocking tool, for example, which for example frees a detent hook, which engages behind an undercut, from this engaged-from-behind state.

(41) In conclusion, it is noted that contact element 1 or contact arrangement 70 or plug connector 50 or plug connector arrangement 100 is or may be intended, suited, or configured, for example, for application or use in motor vehicles or in inverters, motors, control units, batteries, charging devices, or generators. However, contact element 1 or contact arrangement 70 or plug connector 50 or plug connector arrangement 100 is not limited to such applications or uses.