EP0660442B1 - Terminal bloc on printed circuit boards - Google Patents

Abstract

The present invention relates to a printed circuit board terminal comprising a first part having contacts for a printed circuit board, into which part a fitting plug part can be inserted having at least one conductor insertion opening and at least one contact element which comes into contact with the inserted conductor on the one hand and, on the other hand, can be brought into contact with the contact element of the first part during connection of the plug part and this first part. According to the present invention, it is now provided that the first part is a housing part (10) which is open on one side and is designed such that it can alternatively hold, in a fitting manner, either an insert part (13) for the connection of individual stripped conductors, the housing part (10) and the insert part (13) then together forming a printed circuit board terminal for individual conductors which are to be connected, or the housing part (10) can hold a plug part, in a fitting manner, with a conductor which may already have been connected, it being possible to push the plug part easily into the housing part (10), and the housing part (10) and the plug part then together forming a printed circuit board terminal with a conductor which may have already been connected. The advantage of the solution according to the invention is that the options for use of the first part (housing part 10) for the user of the printed circuit board terminal during production are considerably more versatile. <IMAGE>

Description

The present invention relates to a circuit board clamp comprising a first part with contacts for a printed circuit board and as a second part a suitable plug part that fits into the first part is insertable, with at least one Conductor insertion opening, whereby when connecting plug part and this first part an electrical contact between an inserted conductor on the one hand and the contacts of the Printed circuit board on the other hand can be produced.

From the prior art e.g. DE-OS 41 11 956 are such PCB terminals known. The first part is arranged on the circuit board and with this connected, and the contact elements of this first part soldered to the underside of the circuit board. The plug part can be inserted into the first socket-like part, this Plug connection is designed so that it can be used again is solvable. The plug part points to the first socket-like part facing away from conductor insertion openings , into which individual conductors can be inserted.

It is also known from the prior art that Inserting devices for manually inserted conductors the principle of screwless terminals. Such screwless terminals are e.g. from the DE-OS 36 21 369 known.

A circuit board terminal is known from EP-A 0 452 061 with a first part, the contacts for a printed circuit board has, which can be inserted into the circuit board, wherein this first part is a housing part open on one side, in that contacts can be used from the open side and wherein a second lid-like part is provided, which after Insert the contacts into the open case side of the first Part closes, and the first part that used contacts and the cover part together a PCB terminal for individual conductors to be connected or a multipole PCB terminal block for a row parallel conductor in the form of a ribbon cable or form the like. It is with this PCB terminal also possible by pressure from above on the cover part a connected stripped conductor again pull out.

PCB terminals of the type mentioned above can for example also for electronic ballasts for Fluorescent lamps are used. With these So far, PCB terminals have been replaced defective device so that the connection between solved the plug part and the socket-like first part and the circuit board with the defective device and the completely replaced on this fixed first part was against a new circuit board with an intact device and socket-like first part, in which then the reusable plug part with the connected Ladders was inserted. Such an execution is therefore relatively expensive because you have a single conductor can not plug directly into the first part, but to still requires the connector part. this leads to to a relatively high number of contacts in the electrical connection system as a whole.

In those known from EP-A 0 452 061 PCB terminals is only the connection of one single or several parallel stripped conductors possible, but not the insertion of a plug part.

The object of the present invention is therefore to a more versatile PCB terminal at the beginning mentioned type to create from such individual parts is built that the connectable to the circuit board first part both the connection of a pre-wired unit allows alternatively the connection of individual conductors.

An object of the invention provides the solution to this problem Printed circuit board terminal with the features of claim 1. The first part is one-sided open housing part and designed so that it alternatively either an insert for the connection single stripped conductor can accommodate, where Housing part and insert part then together PCB terminal for individual conductors to be connected form, or the housing part can have a plug part possibly take up already connected conductor ,, the plug part simply into the housing part can be inserted and then housing part and plug part together a PCB terminal with possibly already form connected conductor. By the invention Solution will be the uses of the first part for the user in manufacturing much more versatile.

The second alternative according to the invention, in which a Plug part with connected conductors in connection with the housing part is used has the advantage that the Risk of interchanging the ladder is excluded, and ensures rational production due to the easy final assembly. The first according to the invention Alternative, with the stripped conductor directly individually are connected is also according to the invention easy to use and is particularly useful Use when small series production is desired. The particular advantage according to the invention is therefore that the same housing part for both alternatives Can be used as this with both the insert (first alternative) as well as with one accordingly molded plug part (second alternative, pre-wiring) fits together. The fact that you only have one housing part (first part) leads to a total Rationalization of manufacturing.

According to a preferred development of the invention, this is Housing part multi-pole with a number each parallel to the insertion side open chambers according to the number of poles in which the contact elements are located. For a multipole housing part is of course also a Multipole insert with a corresponding number of poles Use or in the second invention Variant a corresponding multi-pole prewired Connector part. According to the invention it is also possible to a uniform multi-pole housing part a mixed To use technology, that is, for one or more poles a pre-wired connector part in the housing part insert and for the remaining poles an inventive Insert part for the connection of individual conductors in the Insert the housing part. This variant of the invention is Subject of subclaim 16.

According to the invention, there is also a later one for the user Switch between the two alternative connection technologies possible. That is, the user of an inventive Housing part in connection with an inventive Insert part used, the insert parts from the Housing parts in which these are detachably held, take out and instead plug parts according to Push the invention into the housing parts. This will help a change in production the reuse of Housing parts possible and it does not have to be completely different first part to be fixed on the circuit board as has been necessary up to now. It is according to one preferred variant of the invention provided that each a uniform detachable locking connection between Housing part on the one hand and insert part on the other or between the housing part on the one hand and Plug part on the other hand can be produced. A preferred one constructive variant of this locking connection is in Subclaim 18 described.

In the subclaims 6 to 14 are within the scope of the invention preferred design variants of the connector parts described. For example, plug parts can be used Insulation displacement contacts are used, the conductor inserted from above into the chambers of the plug part with the insulation displacement contact in the insulation cuts the conductor and makes contact with the inside produces lying wire. After inserting the ladder, a on the housing of the plug part via a film hinge molded cover part from an open position, in which the Chambers in which the conductors lie are open at the top are pivoted into a closed position in which the chambers are covered on the top.

Other types can also be used within the scope of the invention Insulation displacement contacts used for the connector parts be designed so that the insulated conductor inserted axially into the plug part from the rear and then an insulation displacement contact in the connector part Slidable perpendicular to the direction of insertion of the conductor is guided from its accessible lower end is pressed at the top, which then insulates the Incised and the contact with the inner wire is produced. This constructive Design of an insulation displacement contact per se is out known in the art.

Alternatively, connector parts can also be used, the conductor is inserted into the conductor insertion opening, the insulation in a front area of the conductor removed so that the wire is exposed. The wire will then via an articulated foldable on the housing Clamping part clamped in its front end area and so that the clamped wire from the bottom of the Housing of the plug part at least in a partial area is freely accessible. This freely accessible part arrives then when inserting the plug part into the housing part in contact with the contact element of the housing part.

Preferred design variants within the scope of the invention of the insert are in the subclaims 3 to 5 described. Within the scope of the present invention Insert parts can be used with release handles, according to Pushing the release button pulling the individual out Allow ladder, or also insert parts, where one loosen the resilient contact element using a tool can if you pull out the individual conductor again would like to.

The clever design of the contact elements for Example according to that described in subclaim 17 constructive variant you can see the number of Contact elements that can be found in total in the invention System housing part - insert part - plug part required, to reduce.

Fig. 1a

einen vertikalen Schnitt durch ein Gehäuseteil gemäß der vorliegenden Erfindung;

Fig. 1b

ein erfindungsgemäßes Gehäuseteil in perspektivischer Ansicht;

Fig. 1c

ein Kontaktelement für ein erfindungsgemäßes Gehäuseteil in perspektivischer Darstellung;

Fig. 2a

ein erfindungsgemäßes Einsatzteil im vertikalen Schnitt;

Fig. 2b

ein erfindungsgemäßes Einsatzteil in perspektivischer Ansicht;

Fig. 3a

eine Schnittansicht mit Gehäuseteil und Einsatzteil im Zusammenbau;

Fig. 3b

eine entsprechende perspektivische Ansicht mit Gehäuseteil und Einsatzteil im Zusammenbau

Fig. 4a

ein erfindungsgemäßes Steckerteil im vertikalen Schnitt;

Fig. 4b

ein entsprechendes Steckerteil gemäß Fig. 4a, jedoch mit fixiertem Leiterdraht;

Fig. 4c

ein erfindungsgemäßes Steckerteil in perspektivischer Ansicht;

Fig. 4d

eine Seitenansicht eines Steckerteils gemäß Fig. 4c;

Fig. 5a

eine vertikale Schnittansicht von Gehäuseteil und Steckerteil im Zusammenbau;

Fig. 5b

eine entsprechende perspektivische Ansicht von Gehäuseteil und Steckerteil im Zusammenbau;

Fig. 6a

eine Schnittansicht eines Steckerteils gemäß einer Variante der Erfindung;

Fig. 6b

eine perspektivische Darstellung des Steckerteils gemäß Fig. 6a;

Fig. 6c

das Steckerteil gemäß den Fig. 6a und b mit geschlossenem Klemmdeckel;

Fig. 6d

eine perspektivische Ansicht des Steckerteils mit geschlossenem Klemmdeckel;

Fig. 6e

eine Seitenansicht des Steckerteils mit geschlossenem Klemmdeckel;

Fig. 6f

eine perspektivische Ansicht eines Schneid-Klemm-Kontakts für ein erfindungsgemäßes Steckerteil;

Fig. 7a

eine Schnittansicht des Gehäuseteils mit Steckerteil im Zusammenbau;

Fig. 7b

eine perspektivische Ansicht von Steckerteil und Gehäuseteil im Zusammenbau;

Fig. 8a

eine Schnittansicht durch ein Gehäuseteil im Bereich der federnden Zunge;

Fig. 8b

eine entsprechende Schnittansicht des Gehäuseteils bei eingeschobenem Steckerteil;

Fig. 8c

eine entsprechende Schnittansicht des Gehäuseteils mit eingeschobenem Steckerteil bei gelöster Rastverbindung.

The present invention is described in more detail below on the basis of exemplary embodiments with reference to the accompanying drawings. Show

Fig. 1a

a vertical section through a housing part according to the present invention;

Fig. 1b

an inventive housing part in a perspective view;

Fig. 1c

a contact element for an inventive housing part in a perspective view;

Fig. 2a

an insert according to the invention in vertical section;

Fig. 2b

an insert according to the invention in a perspective view;

Fig. 3a

a sectional view with housing part and insert part in the assembly;

Fig. 3b

a corresponding perspective view with the housing part and insert part in the assembly

Fig. 4a

an inventive connector part in vertical section;

Fig. 4b

a corresponding plug part according to FIG 4a, but with a fixed conductor wire.

Fig. 4c

an inventive connector part in a perspective view;

Fig. 4d

a side view of a connector part of FIG. 4c;

Fig. 5a

a vertical sectional view of the housing part and plug part in assembly;

Fig. 5b

a corresponding perspective view of the housing part and plug part in assembly;

Fig. 6a

a sectional view of a connector part according to a variant of the invention;

Fig. 6b

a perspective view of the connector part of FIG. 6a;

Fig. 6c

6a and b with the closed clamping cover;

Fig. 6d

a perspective view of the plug part with the closed clamping cover;

Fig. 6e

a side view of the plug part with the closed clamping cover;

6f

a perspective view of an insulation displacement contact for an inventive connector part;

Fig. 7a

a sectional view of the housing part with plug part in assembly;

Fig. 7b

a perspective view of the connector part and housing part in assembly;

Fig. 8a

a sectional view through a housing part in the region of the resilient tongue;

Fig. 8b

a corresponding sectional view of the housing part with inserted plug part;

Fig. 8c

a corresponding sectional view of the housing part with inserted plug part with detached locking connection.

Reference is first made to FIGS. 1a and 1b. These show a housing part 10 according to the invention, the Is part of a circuit board clamp according to the invention. The Housing part 10 has a housing 11 which is one of the number number of poles of the PCB terminal block Contact elements 12 receives, the contact tips 12a, 12b be soldered into a circuit board (not shown) can. The contact elements 12 have, as can be seen in FIG. 1c can recognize two standing approximately vertically downwards Contact tips 12a, 12b emerging from the housing part 10 protrude below (see Fig. 1a). In addition, the Contact elements 12 an upper horizontal part, in one from the level of this horizontal part bent contact tongue 12c is located only on her one end is connected to the contact element 12. The free end of this contact tongue 12c is in the rear Area of the housing 11 of the housing part 10, during the part of the contact tongue 12c connected to the contact element 12 the open insertion side of the housing part 10 faces (see Fig. 1a). The free end of the contact tongue 12c is somewhat resiliently formed so that the Contact tongue, which when inserting the connector part 20 with the Head 22 comes into contact with the pressure of the inserted plug part gives way slightly, so as shown in Fig. 5a. The housing 11 of the Housing part 10 also has one of the number of poles corresponding number of test openings 17 on the opposite the open insertion side of the housing Front. The test openings have a vertical axis and via this the contact elements 12 are accessible, so that if necessary, the functionality with a Test device can test.

2a and 2b show an insert part according to the invention 13, which can be inserted into the housing part 10. The Insert part 13 has a housing 16 with one of the number of Poles corresponding number of conductor insertion openings 18. In the housing 16 are pressure springs 15 which are about Are bent in a V-shape and their downward facing resilient leg a contact for an insertable Head forms on the principle of a screwless Connector. About the release button 14, the pressure of bends up the contact leg of the pressure spring 15 above, the conductor wire can be removed from the insertion opening 18 be pulled out. Otherwise, pull out the Conductor not possible because of the contact leg of the Pressure spring 15 is held barb-like.

3a and 3b each show that in the housing part 10 inserted insert part 13 in the assembly. The inserted wire of a conductor (not shown) occurs in conductive connection with the contact element 12, which in the PCB is soldered.

A plug part 20 according to the invention is shown in Fig. 4a to 4d. 4a shows the plug part 20 with open clamping part 23 after inserting a conductor 21 with Wire 22 (non-insulated part of the conductor). The clamping part 23 is on a film hinge 25 (see Fig. 4d) on Molded connector part 20. After inserting the conductor 21 the clamping part 23 is folded over and thereby grasps the wire 22, which is received by a groove 26. The clamping part 23 is locked on the housing of the plug part 20, whereby the Wire 22 is fixed, with a curved deformation 24 of the Connector housing for the wire 22 serves as an abutment. The the end of the wire 22 fixed and folded in this way is shown in FIG. 4b shown, which, like FIGS. 4c and 4d Show plug part 20 with the clamp part 23 folded over. The wire 22 is such that one is at the bent end subsequent section from the bottom of the Plug housing is accessible here.

The connector part 20 thus prepared can now be used as pre-wired unit according to the invention in a Housing part 10 are inserted, as shown in Figs. 5a and 5b. Then it becomes again electrical contact between the wire 22 and the in the Printed circuit board to be soldered contact element 12.

6a to 6d show a plug part 30 according to one another variant of the present invention. The Plug part 30 has a housing 29 in the over partitions 31 several chambers 32 corresponding to the number of poles are formed. On the housing 29 is a film hinge 25 a cover part 27 is injection molded, which in FIGS. 6a and 6b is shown in the open position in which the chambers 32 are open at the top. There is one in each chamber Insulation displacement contact 28 attached between two lower wall sections 33, 34 of the housing 29 is held. This insulation displacement contact 28 is bow-shaped and has the shape of a down in the side view open U-bracket. The insulation displacement contact is in Fig. 6f presented in detail. One leg of the U-shaped Bügels has an angle 35, which is approximately horizontal runs and under the horizontal wall portion 33 of the Housing of the connector part 30 engages (see Fig. 6a). The opposite leg of the U-bracket has a bottom short obtuse-angled bend 36 on the oblique Wall section 34 of the housing of the plug part 30 rests. As can be seen from Fig. 6f, the U-shaped bracket is in the upper area split into two U-webs 37a, 37b, between which is a gap 38 that the insulated conductor 21st records. This gap 38 tapers as can be seen in FIG. 6f recognizes downwards so that the edges of the Insulation displacement contact when pressing in an insulated Conductor 21 cut through the insulation and make contact with the inner wire. After inserting the Head 21 can then folded the cover part 27 and on Housing 29 are fixed (locked). Then that is closed plug part 30 with inserted conductors 21 shown in Figs. 6c, 6d and 6e.

The plug part 30 equipped in this way can in turn be used as pre-wired unit in a housing part according to the invention 10 are inserted, as in FIGS. 7a and 7b is shown. The insulation displacement contacts 28 then occur their horizontal legs 35 (flags) with the in the Circuit board to be soldered contact elements 12 in contact.

8a to 8c show that a in a housing part 10th inserted plug part 20 if necessary after loosening one Snap connection by hand from the housing part 10 again can be pulled out. The same locking mechanism as he in FIGS. 8a to 8c exemplarily for a housing part and a plug part is shown, can also for that Insert part 13 are used, so that in turn for both alternative insert parts, namely plug part on the one hand and insert part, on the other hand, a structural variant of the Housing part 10 is used. As can be seen from Fig. 8a recognizes, is on the top of the housing part 10 resilient tongue 41 connected on one side to its housing molded. To the insertion side through a gap from the a resilient tongue 41 there is a projection 42. If the plug part 20 is now in the housing part 10 inserted, then also the resilient locking tongue 27 with the plug part 20 fully inserted according to FIG. 8b behind the projection 42 of the housing part 10 and pushes the resilient tongue 41 a little high. The locking tongue 27 of the Plug part 20 is slightly upward at its free end thickened. As can be seen from Fig. 8b, the end face lies 27a of the latching tongue 27 partially behind the projection 42, see above that they normally prevent the Plug part 20 blocks from the housing part 10. Now by pressing the finger 43 the resilient tongue 41 of the Housing part 10 is pressed down, then with this too the latching tongue 27 of the plug part 20 is pressed down, so that the end face 27a comes under the projection 42 as this is shown in Fig. 8c. The plug part 20 can then against the direction of insertion from the housing part 10 be pulled out. To accidentally loosen the To avoid locking tongue 27, it is provided that a Housing part 10 at least two side by side has resilient tongues 41 and a plug part or an insert at least two has corresponding adjacent latching tongues 27, as shown in Figures 4c and 5b.

Claims (18)

1. Clamp for printed circuit boards comprising a first part (1) with contacts for a printed circuit board and, as a second part, a corresponding plug-in part (20, 30) which is insertable in the first part, in tile case of a connection between the plug-in part (30) and the first part (1) an electrical contact being made between an inserted conductor (21, 22) on the one hand and the contacts (12) of the printed circuit board, on the other hand, characterised in that the first part is a housing part (10) open at one end and designed in such a manner that it is able to receive with close fit the plug-in part (20, 30) with possibly already connected conductor, on the one hand, the plug-in part (20, 30) being simply insertable in the housing part (10) and the housing part (10) and the plug-in part (20, 30) then forming together a clamp for a printed circuit board with possibly already connected conductor (21), and that a third part is provided for the connection of individual uninsulated conductors, the third part being an insertion part (13) and the housing part (10) open at one end being able to receive alternatively also the insertion part (13) with a close fit, said housing part (10) and said insertion part (13) then forming a clamp for printed circuit boards for conductors to be connected individually.
2. Clamp for printed circuit boards as claimed in claim 1, characterised in that the housing part (10) is formed multipolar with a plurality of chambers positioned side by side and parallel to each other and being open at the insertion ends and comprising in each case a contact element (12) in each chamber corresponding to the number of poles.
3. Clamp for printed circuit boards as claimed in one of claims 1 or 2, characterised in that the insertion part (13) is formed multipolar with a plurality of conductor insertion openings (18) positioned side by side and parallel to each other, and with resilient pressure springs (15) for the screwless connection by insertion of conductors corresponding to the number of poles, the connected conductor being in each case electrically connected to the contact element (12) of the housing part when the insertion part (13) is inserted in the housing part (10).
4. Clamp for printed circuit boards as claimed in claim 3, characterised in that the resilient pressure springs (15) of the insertion part are approximately V-shaped with an upper horizontal leg which is fixedly mounted in the housing (16) of the insertion part and with an obliquely directed leg with resilient elasticity at the upper end, the lower end of which being exposed and positioned approximately at the level of the axis of the conductor insertion opening (18).
5. Clamp for printed circuit boards as claimed in claim 3 or 4, characterised in that in the housing (16) of the insertion part (13) a release trigger (14) is mounted in a pivotable manner which extends parallel to the obliquely directed leg of the pressure spring (15) so that in the case of pressure from above on the upper end of the release trigger the resilient leg of the pressure spring (15) being pushed upwardly by the lower end of said trigger and the conductor being then able to be withdrawn.
6. Clamp for printed circuit boards as claimed in claim 1 or 2, characterised in that the plug-in part (20) comprises in each case a clamping part formed at the housing by means of a sheet hinge joint which is tiltable from an open position in a closed position in which it clamps the end region of the wire (22) of an inserted conductor (21) in the housing of the plug-in part (20).
7. Clamp for printed circuit boards as claimed in claim 6, characterised in that in the case of a clamped end region of the wire (22) an adjacent region of the uninsulated wire (22) lies in the housing of the plug-in part (20) so as to be freely accessible from the underside thereof.
8. Clamp for printed circuit boards as claimed in any one of claims 1 to 7, characterised in that the plug-in part (20) is formed multipolar with a plurality of connected and clamped conductors (21, 22) positioned side by side and parallel to each other corresponding to the number of poles and that, in the case that the plug-in part (20) is inserted in the housing part (10), in each case the wire (22) of the conductor of each pole is in contact with the corresponding contact element (12) of the corresponding pole of the housing part (10).
9. Clamp for printed circuit boards as claimed in claim 1, characterised in that the plug-in part (30) comprises a cutting-and-clamping contact (28) for the connection of an insulated conductor (21).
10. Clamp for printed circuit boards as claimed in one of claims 1 or 9, characterised in that the plug-in part (30) is formed multipolar with a plurality of chambers (32) positioned side by side and parallel to each other, and being separated from one another by partition walls (31), each of said chambers comprising a cutting-and-clamping contact for the connection of an insulated conductor.
11. Clamp for printed circuit boards as claimed in one of claims 1, 9 or 10, characterised in that the plug-in part (30) comprises a cover part (27) moulded at the housing in an articulated manner by means of a sheet hinge joint (25), said cover part being pivotable from an open position in which the chambers (32) are open towards the top into a closed position in which the chambers are covered at the top side.
12. Clamp for printed circuit boards as claimed in any one of claims 9 to 11, characterised in that the cutting-and-clamping contact (28) approximately has the shape of a U-bracket open downwardly with a leg (35) bent off horizontally from one of the U-legs which comes into contact with the contact element (12) when the plug-in part (30) is inserted in the housing part (10).
13. Clamp for printed circuit boards as claimed in any one of claims 9 to 12, characterised in that the cutting-and-clamping contact (28) comprises at the end of one of the U-legs an obliquely bent off leg (36) which engages at an oblique face in the wall of the housing of the plug-in part (30).
14. Clamp for printed circuit boards as claimed in any one of claims 9 to 13, characterised in that the cutting-and-clamping contact (28) is divided in the upper region into two parallel U-webs (37a, 37b) arranged at a distance from one another and forming between them a gap (38) tapering towards the lower end.
15. Clamp for printed circuit boards as claimed in any one of claims 1 to 14, characterised in that the housing part (10) comprises in each case one test opening (17) per pole which is accessible from above and is positioned at that side of its housing facing the insertion side of the insertion part (13) or the plug-in part (20, 30), respectively, by means of which test openings the contact elements (12) of the housing part (10) are accessible.
16. Clamp for printed circuit boards as claimed in any one of claims 1 to 15, characterised in that this clamp is formed multipolar and at least one pole of the housing part (10) receives an insertion part (13) for the connection of an individual conductor, and that in at least one pole of the housing part (10) a plug-in part (20, 30) with possibly already connected conductor (21) is inserted.
17. Clamp for printed circuit boards as claimed in any one of claims 1 to 16, characterised in that the contact elements (12) of the housing part (10) comprise two contact tips (12a, 12b) extending approximately vertically downwardly and projecting downwardly from the housing part (10), as well as a slightly bent up contact tongue (12c) lying at the upper side of the contact element and approximately horizontally in the housing part (10) which is only fastened at its end facing the insertion side of the housing part and is formed at its bent up free end so as to be elastically flexible in the downward direction.
18. Clamp for printed circuit boards as claimed in any one of claims 1 to 17, characterised in that at the upper side of the housing of the plug-in part (20, 30) and/or at the upper side of the housing of the insertion part (13) there is integrally formed at least one resilient locking tongue (27), and at the housing part (10), at the upper side thereof, there is integrally formed at least one resilient tongue (41) associated with the locking tongue (27), in the case that the plug-in part (20, 30) or the insertion part (13), respectively, are inserted, the locking tongue (27) engages behind a projection (42) at the upper side of the housing part (10) and the locking connection is released by pressure on the resilient tongue of the housing part and the plug-in part (20, 30) or the insertion part (13), respectively, then being able to be withdrawn against the direction of insertion.

Images