EP0562645A2 - Plug connector for the electrical connection of trailers - Google Patents

Abstract

The invention relates, inter alia, to a plug for a plug connection for the electrical connection of motor-vehicle trailers, having a housing which accommodates a contact insert (2) having contact pins (3) and which has a bayonet connecting part (5) for connection to a plug socket from an inner sleeve (7) and a bayonet ring (8) which is supported thereon such that it can rotate, having a positively-locking interlock, which can preferably be unlocked in a positive manner during insertion of the bayonet connecting part (5) into the associated socket, of the bayonet ring (8) to the inner sleeve (7) in the bayonet unlocking position, which has an unlocking pin (28) which, in the bayonet unlocking position, projects radially out of an opening (27) in the bayonet ring (8) and is supported on an interlock spring (29) which, in the bayonet unlocking position, inhibits twisting of the bayonet ring (8) with respect to the inner sleeve (7) and allows said twisting when the unlocking pin (28) is pressed down. <IMAGE>

Description

The invention relates to a plug for a plug connection for the electrical connection of motor vehicle trailers, with a housing receiving a contact insert, which has a bayonet connection part for connection to a socket from an inner sleeve and a bayonet ring rotatably mounted thereon.

The object of the present invention is to improve a plug of this type in such a way that it is easy to handle, easy to manufacture, safe to use and durable in function.

This object is achieved essentially in that a positive locking, preferably inevitable upon insertion of the bayonet connector into the associated socket, locks the bayonet ring with the inner sleeve in the bayonet unlocking position, which has a radially protruding unlocking pin in a bayonet unlocking position from an opening of the bayonet ring is supported on a locking spring which in Bayonet release position prevents twisting of the bayonet ring relative to the inner sleeve and releases it when the unlocking pin is pressed down.

When the bayonet ring is initially inserted axially into the socket, the unlocking pin is pressed down at the edge of the can opening. Due to such a forced unlocking or locking, the bayonet ring can be rotated against the inner sleeve with simple technical means if the bayonet connector is plugged into the associated socket, while it is otherwise locked against the inner sleeve. As a result, the bayonet ring and inner sleeve can be rotated as a unit and inserted into the correct insertion position before the plug is inserted into the socket. The lock is only released when the plug is inserted into the socket. This measure makes the handling of the plug according to the invention even easier and easier.

So that the unlocking pin is inevitably and slightly depressed when the plug is plugged into the socket, it can preferably have a socket slope facing the socket.

For a particularly secure support on the locking spring, which also serves as a return spring for the unlocking pin, the unlocking pin can be supported on the locking spring via a platform.

The unlocking pin is preferably located off-center on the platform, so that the pin taking into account an inner recess of the bayonet ring provided for the platform always in the correct orientation with regard to the ramp slope in the opening of the bayonet ring. This always ensures correct installation. The platform itself is received and guided in the inner recess of the bayonet ring.

A particularly space-saving design in the axial direction with large-area support of the unlocking pin and reliable function is obtained when the locking spring is designed as a leaf spring.

A special feature of the invention is that the leaf spring is held, for example, clamped in an outer recess of the inner sleeve, and that preferably a resilient locking section protrudes from the leaf spring main body, which interacts in the bayonet unlocking position with an inner locking edge of the bayonet ring and on which the unlocking pin acts when depressed in the sense of lifting off the locking edge. In this way, the same spring fulfills both the reset function for the unlocking pin and the locking function, while maintaining an extremely space-saving design.

The aforementioned possibility can be realized in particular in that the locking edge is formed by a side boundary of the recess of the bayonet ring receiving the platform of the unlocking pin and the platform is somewhat thinner than the depth of the recess. A special locking edge is then no longer required.

A simple assembly and secure mounting of the leaf spring can be ensured in that the recess of the inner sleeve provided for the leaf spring has undercuts for receiving the ends of the leaf spring.

In addition to the locking section, the leaf spring preferably bears elevations or features which prevent the leaf spring from jumping out of its recess when the inner sleeve is mounted in the bayonet ring and entering the gap between the bayonet ring and the inner sleeve.

A cover support platform for supporting the socket cover in the open position is preferably attached to the bayonet ring and can be rotated therewith. The lid support platform is attached to the bayonet ring in such an angular position that in the locked position of the bayonet ring in the socket it has the correct position relative to the socket and its cover, so that the open cover of the socket can be placed on the cover support platform with the plug inserted, so that whose inner seal is protected.

The housing preferably has a cap which can be screwed to the inner sleeve while axially fixing the contact insert in order to ensure simple assembly and disassembly.

The lid support platform preferably has a base section connected to the bayonet ring and a plate section. So that the plate section can also serve as an exchangeable emblem carrier, it preferably carries elevations and / or depressions in the form of letters, numbers, marks or the like on its upper side. These can also be provided in a special interchangeable insert of the plate section.

A particularly advantageous embodiment of the invention consists in that the inner sleeve projects beyond the bayonet ring on the socket end with an annular bead attachment, the outer diameter of which is larger than the inner diameter of the bayonet ring, and in that the inner sleeve with an outer shoulder facing the socket end rests on an inner shoulder of the bayonet ring in the axial direction. This ensures that the bayonet ring can be easily rotated on the inner sleeve with axial immovability between the annular bead attachment and the outer shoulder of the inner sleeve. The assembly of the inner sleeve and the bayonet ring can be done by fitting one into the other, so that the bayonet ring is axially fixed relative to the inner sleeve between the annular bead attachment and the outer shoulder of the inner sleeve, but the rotatability of the two parts relative to one another is ensured.

So that the plug opposite the socket and the contact insert opposite the inner sleeve inevitably take the correct position when the plug and socket are put together, the inner sleeve - in addition to the standard-compliant inner rib for coding the plug rotation position - preferably has a (further) axial inner rib for coding the contact insert rotational position .

According to a further essential concept of the invention, the bayonet ring can also be releasably latched to the inner sleeve in the bayonet unlocking rotational position, ie in the position in which the bayonet ring is rotated out of engagement with the socket in its initial rotational position. As a result, the plug is overall easy to insert and, combined with the correct rotational arrangement of the contact insert in the inner sleeve, is also easy to find. The initial Inserting the plug into the socket thus takes place in the releasably fixed starting rotational position of the bayonet ring, so that the plug connection can always be made easily and quickly. When loosening the plug from the socket, the bayonet ring returns by rotating it from the locked rotational position with the socket into this releasably fixed starting rotational position, so that it is always in the correct rotational orientation for a new insertion process.

For the releasable locking of the bayonet ring and the inner sleeve, the bayonet ring preferably has a partially annular groove on its inside, in which a radial projection of the inner sleeve is guided; In one end region of the groove, a locking projection is provided, which can be run over by the projection of the inner sleeve during rotation into the locking position.

The latching projection preferably has a run-up slope for the projection of the inner sleeve which is effective when the bayonet ring is rotated in the bayonet unlocking position and a relatively steep latching edge on the side opposite in the direction of rotation. This ensures that the bayonet ring can be easily brought into the releasably fixed starting rotational position, but can only be released from it again with greater effort, so that an unwanted accidental release from the latching position is largely avoided.

The smoothness of the rotation of the inner sleeve relative to the bayonet ring is ensured in a development of the invention in that the inner sleeve carries guide ribs at an angular distance from one another at least on the outer surface of its front cylindrical section guided in the bayonet ring. It is only with these that the inner sleeve rests on the inner surface of the bayonet ring. The guide ribs can be rounded on their guide surface.

The guide ribs can run essentially axially. However, they are preferably, for example, at an angle of 45 ° to the longitudinal axis of the plug, inclined to further improve the running properties of the bayonet ring on the inner sleeve.

Further objectives, features, advantages and possible uses of the present invention result from the following description of exemplary embodiments with reference to the drawing. All of the described and / or illustrated features, alone or in any meaningful combination, form the subject matter of the present invention, regardless of how they are summarized in the claims or their relationship.

Fig. 1a

in Seitenansicht einen die Erfindung aufweisenden Stecker gemäß einem Ausführungsbeispiel,

Fig. 1b

einen Längsschnitt durch den Stecker nach Fig. 1a,

Fig. 1c

einen Querschnitt durch den Stecker entlang der Schnittlinie A-B von Fig. 1b,

Fig. 2a

eine Schrägansicht des Plattenabschnittes der Deckelaufnahmeplattform (gegenüber Fig. 1 vergrößert)

Fig. 2b

eine Seitenansicht des Plattenabschnittes von Fig.-2a,

Fig. 2c

einen Teilschnitt A-B gemäß Fig. 2b,

Fig. 2d

eine Draufsicht auf den Plattenabschnitt,

Fig. 2e

einen Schnitt C-D durch den Plattenabschnitt gemäß Fig. 2d,

Fig. 2f

eine Ansicht Z des Plattenabschnittes von Fig. 2e,

Fig. 2g

eine Ansicht Y des Plattenabschnittes von Fig. 2b,

Fig. 2h

eine Ansicht X des Plattenabschnittes gemäß Fig. 2d,

Fig. 3a

einen Längsschnitt durch den Bajonettring gemäß der Neuerung,

Fig. 3b

eine Schrägansicht Z des Bajonettringes gemäß Fig. 3a,

Fig. 3c

eine Ansicht X des Bajonettringes gemäß Fig. 3e,

Fig. 3d

die Einzelheit W aus Fig. 3c,

Fig. 3e

eine Seitenansicht des Bajonettringes,

Fig. 3f

eine Ansicht Y (teilweise weggebrochen) des Bajonettringes gemäß Fig. 3e,

Fig. 4a

einen Längsschnitt der Innenhülse nach der Erfindung,

Fig. 4b

eine Seitenansicht der Innenhülse (teilweise weggebrochen),

Fig. 4c

eine Ansicht X der Innenhülse gemäß Fig. 4b,

Fig. 4d

einen Teilschnitt A-B der Innenhülse gemäß Fig. 4a,

Fig. 5a

eine Ansicht Y (teilweise weggebrochen) des Bajonettringes gemaß Fig. 5b für einen Stecker gemäß Fig. 1a,

Fig. 5b

eine Seitenansicht des Bajonettringes für den Stecker gemäß Fig. 1a,

Fig. 6a

einen Längsschnitt der Innenhülse für einen Stecker gemäß Ausführungsform nach Fig. 1a,

Fig. 6b

eine Seitenansicht der Innenhülse (teilweise weggebrochen) gemäß Fig. 6a,

Fig. 6c

einen Querschnitt durch die Innenhülse entlang der Schnittlinie C-D von Fig. 6b,

Fig. 6d

eine Ansicht W (weggebrochen) der Innenhülse gemäß Fig. 6a,

Fig. 7a

(vergrößert) eine Seitenansicht des Entriegelungsstiftes mit Plattform für einen Stecker gemäß Fig. 1a,

Fig. 7b

eine Ansicht Z des Entriegelungsstiftes gemäß Fig. 7a,

Fig. 8a

eine Seitenansicht einer als Blattfeder ausgebildeten Verriegelungsfeder für einen Stecker gemäß Fig. 1a,

Fig. 8b

eine Draufsicht X der Verriegelungsfeder gemäß Fig. 8a.

Show it:

Fig. 1a

in side view a connector having the invention according to an embodiment,

Fig. 1b

2 shows a longitudinal section through the plug according to FIG. 1a,

Fig. 1c

2 shows a cross section through the plug along the section line AB from FIG. 1b,

Fig. 2a

an oblique view of the plate portion of the lid receiving platform (compared to Fig. 1 enlarged)

Fig. 2b

a side view of the plate portion of Fig. 2a,

Fig. 2c

a partial section AB according to FIG. 2b,

Fig. 2d

a plan view of the plate section,

Fig. 2e

3 shows a section CD through the plate section according to FIG. 2d,

Fig. 2f

2 shows a view Z of the plate section from FIG. 2e,

Fig. 2g

a view Y of the plate portion of Fig. 2b,

Fig. 2h

3 a view X of the plate section according to FIG. 2d,

Fig. 3a

a longitudinal section through the bayonet ring according to the innovation,

Fig. 3b

3 shows an oblique view Z of the bayonet ring according to FIG. 3a,

Fig. 3c

3 shows a view X of the bayonet ring according to FIG. 3e,

Fig. 3d

the detail W from Fig. 3c,

Fig. 3e

a side view of the bayonet ring,

3f

3 shows a view Y (partially broken away) of the bayonet ring according to FIG. 3e,

Fig. 4a

a longitudinal section of the inner sleeve according to the invention,

Fig. 4b

a side view of the inner sleeve (partially broken away),

Fig. 4c

3 shows a view X of the inner sleeve according to FIG. 4b,

Fig. 4d

4 shows a partial section AB of the inner sleeve according to FIG. 4a,

Fig. 5a

5 a view Y (partially broken away) of the bayonet ring according to FIG. 5 b for a plug according to FIG. 1 a,

Fig. 5b

2 shows a side view of the bayonet ring for the plug according to FIG. 1a,

Fig. 6a

2 shows a longitudinal section of the inner sleeve for a plug according to the embodiment according to FIG. 1a,

Fig. 6b

6a shows a side view of the inner sleeve (partially broken away),

Fig. 6c

3 shows a cross section through the inner sleeve along the section line CD from FIG. 6b,

Fig. 6d

6 shows a view W (broken away) of the inner sleeve according to FIG. 6a,

Fig. 7a

(enlarged) a side view of the unlocking pin with platform for a plug according to FIG. 1a,

Fig. 7b

6 shows a view Z of the unlocking pin according to FIG. 7a,

Fig. 8a

2 shows a side view of a locking spring designed as a leaf spring for a plug according to FIG. 1a,

Fig. 8b

a top view X of the locking spring according to FIG. 8a.

The plug 1 for a plug connection for the electrical connection of motor vehicle trailers according to FIGS. 1a to 1c has a contact insert 2 with contact pins 3, which is accommodated in a housing. The housing consists of a cap 4 and a bayonet connection part 5. On the rear end of the cap 4, a union nut 22 is screwed to fix a seal 23 against the ingress of moisture at the cable entry. The bayonet connection part 5 is used to connect to a socket which has corresponding projections for engaging in the bayonet grooves. On the bayonet connection part 5, a cover support platform 6 is also provided, on which the socket cover can lie flat in the open position so that its inner seal is protected. The bayonet connection part 5 consists of an inner sleeve 7 and a bayonet ring 8. The bayonet ring 8 is rotatably mounted on the inner sleeve 7. The cap 4 is screwed to the rear end of the inner sleeve 7. As a result, the contact insert 2 is against an inner shoulder 24 of the inner sleeve 7 pressed. An O-ring 25 can be provided between the cap 4 and the inner sleeve 7 for sealing. The housing is thus completely sealed when the plug is plugged into a socket.

The lid support platform 6 is attached to the bayonet ring 8 and rotatable with it. The lid support platform 6 is formed in two parts, namely it consists of a base section 9, which is integrally connected to the bayonet ring 8, and a plate section 10, which can be attached to the base section 9 as a separate component, e.g. can be plugged in and fastened to this, for example by means of screw 26. As can be seen in particular from FIGS. 2c, 2d, 2g and 3a to 3e, base section 9 and plate section 10 have mutually matching guide ribs 11 and guide grooves 12, which ensure that the two sections 9, 10 are easy to assemble and hold to one another.

As can be seen in particular from FIGS. 1a and 1b, the plate section 10 is arranged outside the longitudinal axis A of the socket, starting from the socket side in the direction of the cable connection side and sloping in relation to the longitudinal axis A, so that when the plug 1 is inserted into a socket, its cover is reliably level the lid support platform 6 can hang up.

So that the cover support platform 6 can withstand the forces that occur, the plate section 10 is supported on the base section with a support section 13 in a division plane T, which is essentially perpendicular to the longitudinal axis A of the plug. The division level T essentially coincides with the level of the cable connection end of the bayonet ring 8 together. As can be seen from FIG. 2f, the plate section 10 preferably bears an emblem for identification.

The inner sleeve 7 projects beyond the bayonet ring 8 on the socket side, as can be seen particularly in FIGS. 1a and 1b, with an annular bead attachment 14. The outer diameter of the annular bead attachment 14 is larger than the inner diameter of the bayonet ring 8 there. Furthermore, the inner sleeve 7 lies with an outer shoulder facing the socket 15 (which is formed simultaneously with the inner shoulder 24) on an inner shoulder 16 of the bayonet ring 8 axially. As a result, the bayonet ring 8 can be rotated slightly relative to the inner sleeve 7, but is axially immovable.

The embodiment of the connector according to the invention according to FIGS. 1a to 1c and 5a to 8b is equipped with a forced locking of a rotation of the inner sleeve 7 relative to the bayonet ring 8 in the bayonet unlocking position. The positive locking mechanism is intended to prevent the inner sleeve 7 from being rotated unintentionally with respect to the bayonet ring 8 before the plug 1 is inserted into a socket. In this way, when the plug 1 of this embodiment is inserted into a socket, the bayonet ring 8 and the inner sleeve 7 with the contact insert 2 always have the correct starting position. In the bayonet release position, an unlocking pin 28 projects radially from an opening 27 in the foremost section of the bayonet ring 8 to be inserted into the socket. The unlocking pin 28 is supported on a locking spring 29 which, in the bayonet unlocking position when the unlocking pin 28 is not pressed in, blocks rotation of the bayonet ring 8 with respect to the inner sleeve 7 and releases it when the unlocking pin is depressed. As can be seen in particular from FIGS. 1b, 7a and 7b, the unlocking pin 28 is on its protruding from the opening 27 of the bayonet ring 8 in the bayonet unlocked position a ramp 30 which faces the socket edge when the plug 1 is inserted into a socket and interacts with it. When the plug 1 is inserted into the socket, the unlocking pin 28 is inevitably pressed inward through the edge of the socket. The unlocking pin 28 is supported on the locking spring 29 via a platform 31. 7a and 7b, the unlocking pin 28 sits eccentrically on the platform 31. Accordingly, the opening 27 of the bayonet ring 8 for the passage of the unlocking pin 28 with respect to an inner recess 35 of the bayonet ring 8 is also arranged off-center, which serves to receive and guide the platform 31, as can be seen in particular from FIGS. 1c, 5a and 5b.

The locking spring 29 is designed as a leaf spring according to FIGS. 8a and 8b. It has a slight curvature approximately corresponding to the circumferential curvature of an outer depression 32 of the inner sleeve 7, in which it is clamped. According to FIG. 8 a, a resilient locking section 33 protrudes from the leaf spring main body, which in the bayonet unlocking position interacts with an inner locking edge 34 of the bayonet ring 8 and on which the unlocking pin 28 acts when depressed in the sense of being lifted off the locking edge 34. According to FIG. 5b, the locking edge 34 is formed by a side boundary of the recess 35 of the bayonet ring 8 receiving the platform 31 of the unlocking pin 28 and the platform 31 is somewhat thinner than the depth of the recess 35, so that it is slightly radially movable. To clamp the leaf spring 29 in the recess 32, the latter has undercuts 38, which can be seen in particular from FIGS. 6d and 6c.

In addition to the locking section 33, the leaf spring 29 carries, for example, dome-shaped elevations or features 36, which prevent the leaf spring 29 from being able to get out of the recess 32 into the annular gap between the inner sleeve 7 and the bayonet ring 8 when the inner sleeve 7 is mounted in the bayonet ring 8.

Furthermore, in another embodiment of the invention, the bayonet ring 8 can be releasably locked to the inner sleeve 7 in the bayonet unlocking position. This is achieved in that the bayonet ring 8 has a partially annular groove 17 (FIGS. 3a, 3c, 3d) in which a radial projection 18 of the inner sleeve 7 (FIGS. 4a, 4b and 4d) is guided. In the end region of the groove 17, a latching projection 19 (FIG. 3d) is provided, which the projection 18 of the inner sleeve 7 drives over when the bayonet ring 8 is rotated into the bayonet unlocking position. The projection 18 is then in the space between the locking projection 19 and the (in Fig. 3c lower) end of the groove 17 in a releasable locking position. According to FIG. 3d, the locking projection 19 has an effective run-on slope for the projection 18 of the inner sleeve 7 and on the side opposite in the direction of rotation when the bayonet ring 8 is rotated into the bayonet unlocking position (in which the bayonet parts of the bayonet ring are out of engagement with the bayonet parts of the socket) relatively steep locking edge. The run-up slope is in Fig. 3d above, the locking edge below.

4a and 4c that the inner sleeve 7 has two axial inner ribs 20 and 21. These not only serve the standard-compliant coding of the plug position, but also the coding of the contact insert position compared to the socket. For this purpose, both the contact insert 2 of the Plug 1 and the contact insert of the associated socket corresponding recesses into which the inner ribs 20, 21 fit, so that the two associated contact inserts always have the correct orientation to one another when the plug is inserted into the socket.

So that despite a secure guidance of the inner sleeve 7 on the bayonet ring 8, a slight rotation relative to one another is possible, the inner sleeve 7 carries on the outer surface of its front cylindrical section guided in the bayonet ring 8 at an angular distance of, for example, 120 ° (cf. Fig. 6a to 6d) externally rounded guide ribs 37, which run obliquely to the longitudinal axis A of the plug and which bear against the inner wall surface of the bayonet ring 8.

Reference symbol list:

1

plug

2nd

Contact insert

3rd

Contact pins

4th

cap

5

Bayonet connector

6

Lid support platform

7

Inner sleeve

8th

Bayonet ring

9

Base section

10th

Plate section

11

Guide ribs

12

Guide grooves

13

Support section

14

Ring bead attachment

15

Outer shoulder

16

Inner shoulder

17th

groove

18th

head Start

19th

Locking projection

20th

Inner ribs

21

Inner ribs

22

Cap nut

23

poetry

24th

Inner shoulder

25th

O-ring

26

screw

27

opening

28

Release pin

29

Locking spring, leaf spring

30th

Ramp

31

platform

32

deepening

33

Locking section

34

Locking edge

35

deepening

36

Increases or values

37

Guide ribs

38

Undercuts

Claims (15)

Plug for a plug connection for the electrical connection of motor vehicle trailers, with a contact insert (2) with contact pins (3) receiving housing, which has a bayonet connection part (5) for connection to a socket made of an inner sleeve (7) and a rotatably mounted thereon Has a bayonet ring (8), characterized by a form-locking locking of the bayonet ring (8) with the inner sleeve (7) in the bayonet unlocking position, which inevitably unlocks when the bayonet connection part (5) is inserted into the associated socket, which locks a bayonet unlocking position from an opening (27). of the bayonet ring (8) has a radially protruding unlocking pin (28) which is supported on a locking spring (29) which, in the bayonet unlocking position, prevents the bayonet ring (8) from rotating relative to the inner sleeve (7) and releases it when the unlocking pin (28) is depressed. Plug according to Claim 1, characterized in that the unlocking pin (28) is supported on the locking spring (29) via a platform (31), the unlocking pin (28) preferably having a run-up slope (30), and preferably the unlocking pin (28 ) sits off-center on the platform (31). Plug according to claim 2, characterized in that the platform (31) is received and guided in an inner recess (35) of the bayonet ring (8). Plug according to one of claims 1 to 3, characterized in that the locking spring (29) is designed as a leaf spring. Plug according to claim 4, characterized in that the leaf spring (29) is held, preferably clamped, in an outer recess (32) of the inner sleeve (7), and that a resilient locking section (33) projects from the main leaf spring body, which in the bayonet unlocking position also an inner locking edge (34) of the bayonet ring (8) cooperates and on which the unlocking pin (28) acts in the sense of lifting in front of the locking edge (34), preferably the locking edge (34) from a side boundary of the platform (31) of the unlocking pin (28) receiving recess (35) of the bayonet ring 8 is formed and the platform (31) is somewhat thinner than the depth of the recess (35). Plug according to claims 4 or 5, characterized in that the recess (32) of the inner sleeve (7) has undercuts (38) for receiving the leaf spring ends. Plug according to one of claims 4 to 6, characterized in that the leaf spring (29) has ridges or protrusions (36) in addition to the locking section (33). Plug according to one of Claims 1 to 7, characterized in that a cover support platform (6) for supporting the socket cover in the open position is fastened to the bayonet ring (8) and can be rotated therewith. Plug according to one of claims 1 to 8, characterized in that the housing has a cap (4) which can be screwed to the inner sleeve (7) while axially fixing the contact insert (2). Plug according to claim 9, characterized in that the cover support platform (6) has a plate section (10) which bears letters, numbers, marks or the like, which are provided in the form of elevations and depressions on the top of the plate section (10) . Plug according to one of claims 1 to 10, characterized in that the inner sleeve (7) projects beyond the bayonet ring (8) on the socket end with an annular bead attachment (14), the outer diameter of which is larger than the inner diameter of the bayonet ring (8), and that the inner sleeve (7) with an outer shoulder (15) facing the socket on an inner shoulder (16) of the bayonet ring (8) in the axial direction. Plug according to one of claims 1 to 11, characterized in that the inner sleeve (7) has an axial inner rib (21) for coding the contact insert position. Plug, in particular according to one of claims 1 to 12, characterized in that the bayonet ring (8) with the inner sleeve (7) is releasably latched in the direction of rotation in the bayonet unlocking position, the bayonet ring (8) and inner sleeve (7) preferably being latched for the bayonet ring (8) has a partially annular groove (17), in which a radial projection (18) of the inner sleeve (7) is guided, and in one end region of the groove (17) a locking projection (19) is provided. Plug according to Claim 13, characterized in that the latching projection (19) has a run-up slope which is effective when the bayonet ring (8) rotates in the bayonet release position for the projection (18) of the inner sleeve (7) and on the side opposite in the direction of rotation has a relatively steep latching edge. Plug according to one of claims 1 to 14, characterized in that the inner sleeve (7) carries guide ribs (37) at least on the outer surface of its front cylindrical section guided in the bayonet ring (8) at an angular distance of, for example, 120 ° are preferably substantially axially or obliquely to the longitudinal axis.

Images