Round plug connector comprising a shielding connection

Abstract

The invention relates to a round plug connector for releasable connection to a corresponding mating plug connector. The round plug connector has a housing for receiving at least one insulating body. Furthermore, the housing has at least one locking element for the releasable connection to a mating plug connector. The insulating body is designed for receiving at least one electrical contact element. The housing also receives at least one shielding element, which is produced from an electrically conductive material in order to connect an electromagnetic shield. The shielding element has at least one substantially circumferential contact ring and at least one contact lug, which runs substantially parallel to a plug-in direction. The distinguishing feature of the round plug connector is that the contact ring is held at least partially on a substantially circumferential stop formation of the housing by at least one ring holding formation.

Description

[0001]2024-02-12 - 1 - P2024003DEApplicant: HARTING Electric Stiftung & Co. KG Title: Circular connector with shield connection Description The invention is based on a circular connector with shield connection, in particular for circular connectors with a push-pull locking mechanism according to the preamble of independent claim 1. Such circular connectors are required to connect cables, in particular containing electrically conductive wires, to devices and / or other cables. Particularly in the field of data transmission, cables and connectors are required that have high electromagnetic compatibility (EMC). For this purpose, cables and, in some cases, the wires they contain are sheathed with conductive wire, wire braid, and / or foil. In order to transmit this shielding with a connector, various means of shield connection are used.State of the Art: In the current state of the art, spring elements made of electrically conductive materials are preferred for transferring an electromagnetic shield from an electrically conductive cable via a connector to a mating connector. Spring washers are particularly suitable for circular connectors. Wave washers are particularly popular for shield connection in circular connectors. A disadvantage of using spring washers, including wave washers, is the lack of operational reliability in circular connectors with a so-called push-pull locking mechanism. 2024-02-12 - 2 - P2024003DE Due to the way the locking mechanism works, simple spring washers cannot adequately ensure that the shield connection is secure, even during operation and with the vibrations that may occur.DE 102020110291 A1 cleverly attempts to offer a shield connection for circular connectors with push-pull locking, which overcomes the disadvantages of corrugated washers, spring washers, or spring washers. However, in practice, the proposed solution has proven unstable. Even with normal handling, the circumferential ring can bend. Furthermore, the ring can easily bend. This allows the ring to easily detach from the circumferential groove of the connector and fall off. The object of the invention is to equip a circular connector with push-pull locking with a shield connection element that is robust and reliable and enables improved operational reliability with regard to shield transmission. This object is achieved by the subject matter of the independent claim.Advantageous embodiments of the invention are specified in the subclaims and the following description. The invention is based on a circular connector for detachable connection to a corresponding mating connector. The circular connector has a housing for receiving at least one insulating body. Furthermore, the housing has at least one locking element for detachable connection to a mating connector. The insulating body is designed to receive at least one electrical contact element. The housing2024-02-12 - 3 - P2024003DE further accommodates at least one shielding element, which is made of an electrically conductive material for connecting an electromagnetic shield. The shielding element has at least one substantially circumferential contact ring and at least one contact lug running substantially parallel to a plug-in direction.The circular connector is characterized in that the contact tab is aligned in the plug-in direction starting from the contact ring, so that the contact ring is arranged on the housing facing opposite to the plug-in direction. The housing is preferably a one-piece component that protects the circular connector from the outside. The housing is advantageously made of an electrically conductive material. A housing consisting of more than one housing part is conceivable. A multi-part housing may be preferred, particularly for the purposes of field assembly. The insulating body is a component that can be inserted into the housing. As the name suggests, the insulating body is made of a material that does not conduct electrical current. Plastics are preferably used for this purpose.The insulating body accommodates at least one contact element and is shaped such that the contact element can be brought into electrically conductive connection with a mating contact. The insulating body is preferably designed such that it can be correspondingly engaged with an insulating body of the mating connector. An insulating body can be designed to accommodate a shielding cross. A shielding cross is used when data contacts or data contact pairs are to be shielded from one another in order to enable better signal transmission and / or data transfer. A locking element is understood to be a component that can be brought into engagement with a corresponding component of the mating connector. A locking hook is preferably used here. The locking element can interact with a mating connector housing. Alternatively, the locking element can interact with a counter-locking element.According to the invention, the locking element is arranged along the circumference of the housing. A design as a locking hook for push-pull locking mechanisms is particularly preferred. A design of the locking element as a push-pull inverse locking mechanism is especially preferred. The push-pull inverse locking mechanism is characterized by the possibility of creating particularly space-saving connections with inwardly mounted add-on housings. For this purpose, the locking element of the push-pull inverse locking mechanism is arranged circumferentially and outwardly on the housing. In a regular push-pull locking mechanism, a sleeve is used that surrounds the housing, with the locking elements facing inward.A shielding element is basically a component designed to create an electrically conductive connection in order to shield the signal lines and data lines that can be connected to the circular connector from electromagnetic interference from the environment. In most cases, electrically conductive housings are used, which are connected to electrically conductive mating connector housings, often designed as bulkhead housings. Since a connection between the housing of the circular connector and the housing of the mating connector cannot be made or maintained in an electrically conductive connection with sufficient reliability, shielding elements are used to improve or ensure the electrically conductive connection. The circumferential contact ring refers to an area of ​​the shielding element that is designed roughly like a washer.Alternatively, the contact ring can be designed similarly to a disc spring. A design of the contact ring as a wave spring washer is also conceivable. The contact ring does not necessarily have to have a circular circumference to form a (hollow) cylindrical outer surface. A design with a polygonal outer surface can offer application-specific advantages. According to the invention, the contact ring extends essentially in a plane orthogonal to the plug-in direction of the circular connector. In other words, a base surface of the contact ring extends essentially orthogonal to the plug-in direction. Accordingly, the contact ring has a outer surface that runs essentially parallel to the plug-in direction. A contact lug is understood to be a region of the shielding element formed on the contact ring.The contact lug is designed to securely and reliably contact the mating connector or the components of the mating connector intended for shield transmission. For this purpose, it is proposed that the contact ring and the contact lug are first formed together. Suitable processes for this include punching, water cutting, or laser cutting. The contact lug can then be formed from the common plane using a forming process. The simplest method is a bending process. The shielding element is particularly preferably produced using high-performance punching, in particular a punching and bending process, so that the contact ring is manufactured directly from a sheet metal, preferably a coil, and the contact lug is subsequently bent directly out of the plane of the sheet metal or coil at a desired angle, for example an angle between 60° and 110°.This ensures that the contact lug can be brought into contact with the mating connector or the counter-shield contact to be contacted. A particularly preferred embodiment is one in which the contact lug is arranged on the contact ring at the beginning of the lug, deformed by at least 85° in the plug-in direction. A ring retaining form is understood to be a shaped element on the housing which secures the contact ring of the shield element axially in the plug-in direction. A wedge shape is preferably used here, which is designed to rise counter to the plug-in direction. Advantageously, the contact ring is held at least partially by at least one ring retaining form on a substantially circumferential stop form of the housing. This enables the contact ring to be applied during an assembly process by pushing or pressing the contact ring over the wedge-shaped ring retaining form.Other geometries of the ring holding shape are conceivable, in particular an at least partially circumferential bead, (partially) spherical elevations or bolt-shaped extensions. A stop shape is understood to be a shaped element of the housing which secures the contact ring at least partially in the axial direction counter to the plug-in direction. A projection provided in the housing can be used here. Ideally, the stop shape runs essentially orthogonal to the plug-in direction, at least in the plug-in direction. Particularly advantageously, the stop shape runs parallel to the base of the contact ring in the plug-in direction. An embodiment in which the contact lug has at least one curvature is particularly advantageous. The contact lug thus forms at least one lug maximum and lies within a region described by a lug start and a lug end. The lug start is understood to be the transition between the contact ring and the contact lug.The flag end is the end of the contact flag pointing in the plugging direction. The curvature can simplify contacting through the shielding element and increase its vibration resistance. The curvature enables resilient contacting through the shielding element. In another embodiment, the flag maximum extends outside an imaginary cylinder whose base is formed by the inner diameter of the contact ring. Since the inner diameter of the contact ring must be slightly larger than the outer diameter of a plug-in area of ​​the circular connector for assembly purposes, it makes sense to use this inner diameter as a reference in order to design improved and secure contacting between the shielding element and the mating connector. This ensures that the flag maximum extends beyond the plug-in area.A clever design provides for the contact lug to extend entirely within an imaginary cylinder whose base is formed by an outer diameter of the contact ring. In other words, the contact lug is spaced from a central axis of the connector along its entire length by a distance equal to or less than the radius of the outer contact ring. This design ensures that resilient contact is enabled, but that an excessively wide maximum lug does not create an unnecessary obstacle during mating. In other words, this design ensures that the required mating forces are not excessive. Furthermore, it largely ensures that the shielding element is not damaged during mating.A clever embodiment provides that the flag end is substantially closer to a longitudinal axis of the circular connector than the flag maximum. Previous embodiments sometimes allow the flag end to simultaneously represent the flag maximum. This embodiment ensures that the flag end, following the curvature, lies below the flag maximum. This simplifies the mating process, as the shielding element does not abut components of the mating connector with the flag end. Due to the lower level of the flag end compared to the flag maximum, components of the mating connector can at best slide over the flag end. Subsequently, corresponding components of the mating connector are contacted by the flag maximum of the curvature.In a particularly secure embodiment, the shielding element has a number of contact lugs that is identical to the number of locking elements, with the number being greater than or equal to two. The corresponding embodiment thus improves the locking of the circular connector with a corresponding mating connector. Furthermore, the embodiment improves the reliability of the shield transmission, in particular with regard to vibration protection. An embodiment with three or more contact lugs is preferred. An embodiment with four or more contact lugs is particularly preferred. In a useful embodiment, the contact lugs and the locking elements alternate circumferentially around the circumference of the housing. This embodiment firstly enables improved plug-in security due to a uniform distribution of the locking elements.Furthermore, the equally uniform distribution of the contact lugs further improves contact between the shielding element and a corresponding component of a mating connector. For further improved shield transmission, one embodiment provides that the shielding element is electrically connected to the housing at least through the lug start. For this purpose, at least the lug maximum is electrically connected to the mating connector. Since the contact ring is generally electrically connected to the housing, through at least one of the stop shape or ring holding shape elements to the base surface of the contact ring, further contact with the housing through the lug start of at least one contact lug improves operational reliability. Alternatively or additionally, the shielding element is electrically connected to the housing through the lug end.For this purpose, at least the maximum of the lug is in electrically conductive connection with the mating connector. Since the contact ring is generally in electrically conductive connection with the housing, through at least one of the stop shape or ring holding shape with the base of the contact ring, further contacting of the housing by the lug end of the at least one contact lug improves operational reliability. Particularly preferably, when a circular connector is mated, a lug end rests against a housing of the circular connector with a mating connector, thereby ensuring firm yet flexible contact between the lug end and the housing, as well as between the maximum of the lug and the mating connector. This flexibility ensures the desired vibration resistance.An elegant embodiment provides that the housing has a lug receptacle for receiving the contact lug and a locking receptacle for receiving the locking element. According to the designation, the lug receptacle receives a contact lug such that at least the maximum of the lug protrudes from the lug receptacle. The locking receptacle accordingly receives a locking element, with at least a portion of the locking element protruding from the locking receptacle. 2024-02-12 - 10 - P2024003DE In connection with a push-pull lock, a locking hook advantageously protrudes from the locking receptacle. In a further developed embodiment, the lug receptacle and the locking receptacle differ from one another in at least one of the dimensions: length, width, and depth. This simplifies the assembly process.Ideally, the lug receptacle and the locking receptacle are designed according to the poka-yoke principle, so that a locking element cannot be inserted into the lug receptacle and a shielding element cannot be inserted into the lug receptacle. In addition, a lug receptacle can be designed with a shallower depth to reinforce spring-loaded contact by preventing the contact lug, or rather the curvature of the contact lug, from being excessively compressed. Likewise, a locking receptacle can be designed with a greater depth to provide the locking element, in particular a locking hook, with sufficient space to facilitate plugging and / or unplugging. In one embodiment, a separating shape cleverly separates a lug receptacle from a locking receptacle and vice versa.In addition to providing visual and assembly-related differentiation, the design enables mechanical protection of the locking element and the shielding element. More specifically, lateral deflections of the contact lugs and the locking hooks are largely prevented. The separating mold is also advantageously designed to protect the connection of the circular connector to a mating connector against tilting and / or wobbling. Reduced susceptibility to such movements can enable secure locking in various scenarios. 2024-02-12 - 11 - P2024003DE Finally, an embodiment is proposed in which the ring retaining mold is arranged on the separating mold. This easily eliminates any mutual interference between the shielding element and / or the locking element and a ring retaining mold.Embodiment An embodiment of the invention is illustrated in the drawings and is explained in more detail below. They show: Fig. 1a: A circular connector with a locking mechanism and a shielding element according to the invention; Fig. 1b: A circular connector with a locking mechanism and an alternatively designed shielding element; Fig. 2a: A perspective section of a shielding element according to the invention; Fig. 2b: A perspective section of an alternatively designed shielding element; Fig. 3a: A perspective view of a shielding element according to the invention; Fig. 3b: A perspective view of an alternative shielding element; Fig. 4a: A detailed view in longitudinal section of a circular connector with contacting of the shielding element according to the invention; Fig. 4b: A detailed view in longitudinal section of a circular connector with alternative contacting of the shielding element; Fig. 4c: A detailed view in longitudinal section of a circular connector with combined contacting of the shielding element.The figures contain partly simplified, schematic representations. In some cases, identical reference numerals are used for identical, but possibly not identical, elements. Different views of identical elements may be scaled differently. Directional indications such as "left", "right", "top", and "bottom" are to be understood with reference to the respective figure and may vary in the individual representations compared to the object depicted. Figure 1a shows a partial perspective view of a circular connector 1. Particular attention is paid to the section in the plug-in direction S. R The circular connector 1 has a housing 2. An insulating body 3 is arranged in the housing 2. Opposite the plug-in direction S RA locking element 4 is arranged on the housing 2. The locking element 4 encompasses the outer circumference of the housing 2 and is secured by projections in the axial direction in and against the plug-in direction S R secured. In plug direction S RLocking hooks 40 are formed on the locking element 4. Furthermore, the shielding element 5 according to the invention can be seen, which is arranged on the housing 2. In the interior of the insulating body 3, contact elements 6 can be seen, which are separated from one another by a shielding cross 7 and are electromagnetically shielded. The housing 2 initially has a lug receptacle 20 in the plug-in area. The lug receptacle 20 is flanked on both sides on the circumference by separating forms 21. Starting from this, and following the separating forms 21, a locking receptacle 22 is provided in each case. Furthermore, a ring holding form 23 is each assigned to the separating forms 21. In an alternative embodiment, only two separating forms 21 have a ring holding form 23, wherein the ring holding forms are preferably arranged on the separating forms 21 offset by 180° from one another. This enables a slight oval deformation of the contact ring 50 for assembly purposes.Advantageously, one embodiment provides that the ring holding mold 23 is arranged only on every second separating mold 21. A particularly advantageous embodiment is proposed in which the separating molds 21 are arranged only at positions in the ranges 30° - 60°, 120° - 150°, 210° - 240°, and 300° - 330°, wherein it is proposed that the selected positions be arranged essentially rotationally symmetrically. The ring holding molds 23 prevent the contact ring 50 of the shielding element 5 from becoming loose axially in the plug-in direction S. RFigure 1b shows a substantially identical partial view of an alternative embodiment of the circular connector 1. However, a mounting form 52 has been added to the shielding element 5'. The mounting form 52 simplifies the sliding or pressing-on of the shielding element 5' by the mounting form 52 being flexibly and yieldingly mounted on the contact ring 50. Due to the mounting form 52, the shielding element 5' is longer in the axial direction. Therefore, the housing 2' differs from the housing 2 at least in the different arrangement of the ring holding form 23'. The ring holding form 23' of the housing 2' is further along the separating form 21 in the plug-in direction S Rarranged. Both Figure 1a and Figure 1b show that the lug receptacle 20 differs from the locking receptacle 22 in their design. Furthermore, it can be seen that a locking hook 40 is flanked on the circumference by two contact lugs 51 each, separated by the separating forms 21. Conversely, a contact lug 51 is also flanked by two locking hooks 40 each, separated by the separating forms 21. In other words, the locking hooks 40 of the locking element 4 and the contact lugs 51 of the shielding element 5 alternate circumferentially. Figures 2a and 2b show a detailed view with a partial longitudinal section of the embodiments of the circular connector 1 according to the invention. In order to better illustrate the embodiments of the shielding elements 5 and 5', the locking element 4 has been omitted from Figures 2a and 2b. Figure 2a shows a shielding element 5 according to the invention.A circumferentially extending contact ring 50 is held in position by ring holding forms 23 on a stop form 24. Ideally, an electrically conductive contact with the shielding element 5 already takes place here, in that the contact ring 50 is in electrically conductive contact with at least one of the elements, stop form 24 or 2024-02-12 - 14 - P2024003DE of the ring holding form 23. Any possible rotation of the shielding element 5 is prevented by the lug receptacle 20 and the associated separating forms 21. The lug receptacle 20 is designed as an axial groove. The contact lug 51 protrudes at least partially, ideally through a curved design, beyond the separating forms 21 flanking the contact lug 51. Furthermore, it can be seen that the locking receptacle 22 is deeper than the lug receptacle 20, but is not designed as a continuous groove. The locking receptacle 22 is therefore designed more like a bag opening or pocket.This pocket-like design of the locking receptacle 22 allows a locking hook 40 to protrude beyond the height of the separating form 21 and the height of the contact lug 51 in an unactuated state. During the plugging or unplugging process, however, the locking hook 40 can penetrate far enough into the housing 2 or the locking receptacle 22 to enable a simple and error-free plugging or unplugging process. Figure 2b shows a substantially identical circular connector 1 with a previously mentioned alternative shielding element 5'. This particularly clearly shows how a mounting form 51 can be arranged on the contact ring 50'. The mounting forms 51, together with the contact ring 50', form an approximately V-shaped, U-shaped, or C-shaped extension in profile. This creates a comparatively flexible shape compared to the inventive embodiment as a rigid contact ring 50.This alternative embodiment of the shielding element 5' requires a greater distance between the stop shape 24 and the ring holding shape 23'. Figures 3a and 3b show various embodiments of the shielding elements 5 and 5' according to the invention. Figure 3a initially shows that the shielding element 5 has a circumferential contact ring 50. In the illustrated embodiment, the contact ring 50 is formed as a circumferentially uninterrupted ring. Contact lugs 51 are located on the contact ring 50. The contact lugs 51 are arranged at essentially equal distances from one another on the contact ring 50. According to the invention, the contact lugs 51 are formed along an inner edge 500 of the ring. The contact ring 50 has a recess 501 on each side of the contact lugs 51.These recesses 501 are primarily intended for damage-free forming of the contact lugs 51, but could also be provided or designed for improved assembly. The contact lugs 51 initially have a lug catch 510 in a transition region to the contact ring 50. The lug start 510 is followed by a lug maximum 511. The lug maximum 511 is followed by a lug end 512. According to the invention, the lug element 51 is designed with a curvature. The use of two or more curvatures is also conceivable. The lug start 510 lies essentially within a first imaginary cylinder, the base area of ​​which is defined by the inner diameter d. I of the contact ring 50. To describe the curvature, the vane maximum 511 is preferably provided outside this imaginary cylinder. According to the invention, the vane maximum 511 lies within a second imaginary cylinder, the base area of ​​which is defined by the outer diameter d Aof the contact ring 50. The at least one curvature is terminated by the flag end 512, which is arranged below the level of the flag maximum 511. The flag end 512 is tangent to the first cylinder, the base area of ​​which is determined by the inner diameter d Iis formed, at least. Figure 3b shows the embodiment with a mounting form 52. Here, the basic structure of the shielding element 5' is identical to the shielding element 5 shown in Figure 3a. However, the contact ring 50' additionally has a mounting form 52. The mounting form 52 is arranged with a circumferential section 520 on the outer circumference of the contact ring 50'. The circumferential section 520 is followed by an end section 521. The mounting form 52 forms a substantially n-shaped profile with the contact ring 50', although designs with a V-shaped profile or C-shaped profile or comparable designs are also conceivable and possibly advantageous. A fastening area 522 is arranged on the end section 521, pointing in the direction of the housing 2. This can be easily guided over a ring holding form 23', supported by the said profile-like design of the mounting form 52.With a corresponding material thickness of the shielding element 5', a resiliently elastic deformation of the mounting form 52 is possible, so that assembly is simplified by the mounting form. Furthermore, it can be seen that the mounting form 52 is arranged essentially in the center of a contact lug 51'. To fully maintain the functionality of the contact lug 51' and for advantageous producibility, it is proposed to provide a lug recess 523 in the end section 521. Figures 4a, 4b and 4c show simple and practical embodiments of the contact lug 51. An embodiment of the shielding element 5 without the mounting form 52 is selected as an example. In principle, however, at least one of the shown embodiments is also provided for the shielding element 5' with the mounting form 52. Figure 4a initially shows sections of the housing 2 and the insulating body 3 provided therein.Furthermore, a tab receptacle 20 can be seen, in which the contact tab 51 is arranged. The separating form 21 prevents a displacement in the plugging direction S. R lateral deflection of the contact lug 51, as well as the locking hook 40 of the locking element 4 located behind it, as viewed in Figures 4a, 4b, and 4c. The shielding element 5 is held at its contact ring 50 between a ring holding mold 23 and a stop mold 24 and secured against movement in the axial direction. In Figure 4a, the contact lug 51 does not rest entirely in the lug receptacle 20 with the lug beginning 510. Following the lug beginning 510 in the plug-in direction is the lug maximum 511. The lug maximum 511 protrudes beyond the separating mold 21. In the plug-in direction S RNext is the flag end 512. The 2024-02-12 - 17 - P2024003DE flag end 512 contacts the flag receptacle 20. This ensures that an electromagnetic shield, which is to be transmitted, is at least achieved by contacting the flag end 512 with the housing. Contacting of the shielding element 5 with a mating connector is ensured by the flag maximum 511, which is arranged between the stop shape 24 and the locking hook 40. In Figure 4b, the flag end 512 is designed with a reduced length, whereby the flag end 512 is not in contact with the housing 2 or the flag receptacle 20. Instead, the flag start 510 is in direct contact with the housing 2 and therefore ensures the desired shield connection. In Figure 4c, both the flag end 512 and the flag beginning 510 contact the housing 2 and the flag receptacle 20, respectively.The flag maximum 511 can, of course, be designed in different ways in terms of its deflection from or to a central axis m. The positioning of the flag maximum 511 along the central axis in or against the insertion direction S is also possible. Rmay be designed differently from the form shown. The advantageous embodiment may depend on a mating connector and is preferably designed for optimal contacting of a shield transmission component of the mating connector with the shielding element 5 of the circular connector 1. Even if various aspects or features of the invention are shown in combination in the figures, it is clear to a person skilled in the art – unless otherwise stated – that the combinations shown and discussed are not the only possible ones. In particular, corresponding units or feature complexes from different embodiments can be interchanged. 2024-02-12 - 18 - P2024003DEApplicant: HARTING Electric Stiftung & Co. KG Title: Circular connector with shield connection List of reference symbols 1 Circular connector 2 Gehäuse20 Lug receptacle 21 Separating shape 22 Locking receptacle 23 Ring holding shape 24 Stop shape 3 Insulating body 4 Locking element 40 Locking hook 5 Shielding element 50 Contact ring 500 Ring inner edge 501 Recess 51 Contact lug 510 Lug start 511 Lug maximum 512 Lug end 52 Mounting shape 520 Circumferential section 521 End section 2024-02-12 - 19 - P2024003EN 522 Mounting area 523 Lug recess 6 Contact element 7 Shielding cross S R Plug-in directionm center axisd A Outer diameter d I inner diameter

Claims

2024-02-12 - 1 - P2024003DEApplicant: HARTING Electric Stiftung & Co. KG Title: Circular connector with shield connection Claims 1. Circular connector (1) for detachable connection to a corresponding mating connector, comprising a housing (2) for receiving at least one insulating body (3) and at least one locking element (4) for detachable connection to a mating connector, wherein the insulating body (3) is designed to receive at least one electrical contact element (6) and wherein the housing (2) receives at least one shielding element (5) which is made of an electrically conductive material for connecting an electromagnetic shield, wherein the shielding element (5) has at least one substantially circumferential contact ring (50) and at least one contact ring (50) which is arranged substantially parallel to a plug-in direction (S R) extending contact lug (51), characterized in that the contact lug (51) extends from the contact ring (50) in the plug-in direction (S R ) so that the contact ring (50) is opposite to the plug-in direction (S R) is arranged on the housing (2).

2. Circular connector (1) according to claim 1, characterized in that the contact ring (50) is held at least partially on a substantially circumferential stop shape (24) of the housing (2) by at least one ring holding shape (23). 2024-02-12 - 2 - P2024003DE 3. Circular connector (1) according to one of the preceding claims, characterized in that the contact lug (51) has at least one curvature, which forms at least one lug maximum (511) and lies within a region defined by a lug start (510) between the contact ring (50) and the contact lug (51) and a lug end (512).

4. Circular connector (1) according to one of the preceding claims, characterized in that the flag maximum (511) runs outside an imaginary cylinder, the base area of ​​which is defined by an inner diameter (d I) of the contact ring (50).

5. Circular connector (1) according to one of the preceding claims, characterized in that the contact lug (51) runs completely within an imaginary cylinder, the base area of ​​which is defined by an outer diameter (d A) of the contact ring (50).

6. Circular connector (1) according to one of the preceding claims, characterized in that the lug end (512) has a substantially smaller distance from a longitudinal axis (m) than the lug maximum (511).

7. Circular connector (1) according to one of the preceding claims, characterized in that the shielding element (5) has a number of contact lugs (51) which is identical to the number of locking elements (4), wherein the number is greater than or equal to two.

8. Circular connector (1) according to claim 7, characterized in that the contact lugs (51) and the locking elements (4) alternate circumferentially on the circumference of the housing (2).2024-02-12 - 3 - P2024003DE9.Circular connector (1) according to claim 3, characterized in that the shielding element (5) is in electrically conductive connection with the housing (2) at least through the lug start (510) and is in electrically conductive connection with the mating connector through at least the lug maximum (511).

10. Circular connector (1) according to one of the preceding claims, characterized in that the shielding element (5) is in electrically conductive connection with the housing (2) at least through the lug end (512) and is in electrically conductive connection with the mating connector through at least the lug maximum (511).

11. Circular connector (1) according to one of the preceding claims, characterized in that the contact lug (51) is bent at the lug start (510) by at least 85° in the plug-in direction (S). R) is arranged on the contact ring (50) in a deformed manner.

12. Circular connector (1) according to one of the preceding claims, characterized in that the housing (2) has a lug receptacle (20) for receiving the contact lug (51) and a locking receptacle (22) for receiving the locking element (4).

13. Circular connector (1) according to claim 12, characterized in that the lug receptacle (20) and the locking receptacle (22) differ from one another in at least one of the dimensions length, width, and depth.2024-02-12 - 4 - P2024003DE14. Circular connector (1) according to claim 12, characterized in that a separating mold (21) delimits at least one lug receptacle (20) from a locking receptacle (22) and vice versa.

15. Circular connector (1) according to claim 14, characterized in that the ring holding mold (23) is arranged on at least one separating mold (21).

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