Sealing arrangement with a retaining wall

Abstract

Sealing arrangement (1) with a first housing part (3), a second housing part (5) which is movable relative thereto in an assembly direction (M), and a sealing element (9) which can be arranged between the two housing parts (3, 5), characterized in that at least one of the two housing parts (3, 5) is provided with at least one supporting wall (53), the surface normal (55) of which points transversely to the assembly direction (M) and against which the at least one sealing element (9) bears at least in sections in an assembled state (11) of the first and second housing parts (3, 5).

Description

The invention relates to a sealing arrangement having a first housing part, a second housing part which is movable relative thereto in an assembly direction, and a sealing element which can be arranged between the two housing parts.Sealing arrangements with two housing parts and a seal therebetween are known. They serve in particular for the sealed connection of the two housing parts to one another or at least for the sealed connection between sections of the housing parts. When connecting two housing parts with a seal between them, it may sometimes happen that the seal is deformed in an undesirable manner and is thus impaired in its function.WO 2005 / 101583 A1 relates to a plug connection for establishing an electrical connection through an opening of a partition wall. The plug connection has a first and a second plug, which can be plugged together, wherein at least one of the plugs can be sealed against the partition wall via a seal enclosing the opening. At least one of the plugs can have a clamping device which can be brought into engagement with the other plug and with which the two plugs can be permanently clamped in their mating direction, involving the partition wall. In order to increase the tightness with respect to the environment and the reliability of the connection, the clamping device has at least one sealing device for sealing a connection region between the clamping device and the plug.It is therefore the object of the invention to provide a sealing arrangement of the above-mentioned type, by means of which the function of the seal is ensured.This object is achieved for the sealing arrangement mentioned at the beginning in that at least one of the two housing parts is provided with at least one supporting wall, the surface normal of which points transversely to the mounting direction and on which the at least one sealing element bears at least in sections in a assembled state of the first and second housing parts.The solution according to the invention offers the advantage that the sealing element, at least the region of the sealing element which abuts the supporting wall, is protected from twisting or turning over in different directions. The surface normal of the at least one supporting wall extends substantially transversely to the mounting direction. Consequently, the at least one sealing element can be supported transversely to the mounting direction by the supporting wall in order to prevent twisting or slipping. By supporting the seal, it is also possible to prevent a part of the seal from turning over in one direction, while another part of the seal turns over in an opposite direction. In such a case, the sealing function is no longer provided, in particular in the region of the change of direction of the seal. By supporting the seal in at least one direction, at least the turning over in one direction can be prevented.The solution according to the invention can be further improved by various embodiments which are each advantageous per se and can be combined with one another as desired. These embodiments and the advantages associated therewith are discussed below.According to a first advantageous embodiment, the at least one supporting wall can run substantially in the mounting direction. As a result, the seal can be guided along the supporting wall when the two housing parts are assembled and supported by the latter. This applies in particular to the case that the seal is attached to the housing part, on which the supporting wall is not present.The at least one supporting wall can in particular be part of a rib. This rib preferably runs substantially parallel to the mounting direction. By forming a rib, a support wall can be easily manufactured. The rib can protrude from the remaining housing part substantially transversely to the mounting direction, in particular outwards.Preferably, the at least one sealing element is attached to one of the two housing parts. Particularly preferably, the at least one sealing element is fitted in an captive manner to one of the two housing parts. For example, it can be injection-molded onto one of the two housing parts by an injection molding process.Alternatively, the sealing element can also be manufactured separately and attached to one of the two housing parts, for example, by adhesive bonding. Because the at least one sealing element is attached to one of the two housing parts, the assembly of the housing parts can be facilitated, since in addition to the two housing parts, the seal itself does not also have to be held and / or moved.Preferably, the at least one sealing element is attached to the housing part which is not provided with the supporting wall. The sealing element can then lie against the supporting wall in the assembled state and be supported by the latter.Preferably, the at least its supporting wall is formed monolithically with the remaining housing part having the supporting wall. This makes it possible to obtain a stable and easily manufactured supporting wall. Preferably, at least the housing part which has the supporting wall is manufactured by injection molding, in particular from a plastic. Alternatively to monolithic production, the at least one support wall can also be produced separately and connected to the remaining housing part.At least the region of the sealing element which is supported on the supporting wall in the assembled state can be substantially elongate. This region can thus abut on the supporting wall over a major part of the length thereof and be supported by the latter. The region of the sealing element which, in the assembled state, bears against the supporting wall is preferably band-shaped and has a round, oval or polygonal, in particular rectangular, cross section.At least the region of the sealing element which is supported on the supporting wall in the assembled state can be part of a loop. A loop can be advantageous if housing parts are to be surrounded circumferentially by a seal in order to seal them. The loop can have at least two sections running parallel to one another.The two sections running parallel to one another can be connected to one another by arcuate, in particular semicircular, sections. At least one of the two sections running parallel to one another can rest against a supporting wall in the assembled state. Consequently, the parallel sections are substantially parallel to a supporting wall in the assembled state.In order to protect a large part of a loop formed by the sealing element from loss of function and / or damage, two support walls are preferably surrounded by a loop in the assembled state. Each of the two support walls preferably abuts a different part of the loop. The two support walls are preferably spaced apart from one another parallel to one another and transversely to their longitudinal extent, that is to say transversely to the mounting direction. Alternatively, it is also possible for the loop to be located between two supporting walls, wherein two parallel sections of the loop are each supported by a supporting wall.It should generally be noted that the sealing element, at least a portion thereof, can also bear with two sides running transversely to the mounting direction in each case against a supporting wall.For this purpose, two parallel support walls can be present, the distance between which substantially corresponds to a diameter of the sealing element, so that the sealing element can be arranged between the two support walls in the assembled state.The sealing element preferably has a main body from which the region supported on the supporting wall extends. Thus, other regions of the at least one housing part can also be sealed. Preferably, a plurality of regions, which can each be supported on at least one supporting wall, extend away from the main body. The main body can, for example, at least partially cover the edge of a housing part and seal it in an assembled state.Particularly preferably, the main body can be arranged on the edge of a housing part and serve for sealing the housing part against a surface, for example a wall. The main body itself can be continuous and have the shape of a ring or a rectangle, for example.In order to lock the two housing parts to one another in the assembled state, at least one of the two housing parts can have at least one locking part. The housing part preferably has at least one locking part which also has the at least one supporting wall.In the case where the sealing element has at least one loop, the loop is preferably arranged in the assembled state so as to extend at least in sections around the at least one locking part. In other words, the at least one locking part can be arranged within the loop.The at least one locking part can be, in particular, a cylinder or pin projecting from the remaining housing part. Such a cylinder or pin can cooperate, for example, with a slotted guide either of the other housing part or of a further part of the sealing arrangement. Alternatively, the locking part may also be an opening in which another part can engage for locking.In order to protect and guide the sealing element, in particular when the two housing parts are assembled, the at least one supporting wall preferably has a run-on slope for easier connection to the other housing part. Particularly preferably, at least one supporting wall has an end which is rounded on a plurality of sides. This end of the supporting wall is preferably the end which, viewed along the mounting direction, first comes into contact with the other housing part during assembly. Thus, the seal, which is preferably arranged on the other housing part, can interact with the at least one run-on slope, preferably with a plurality of run-on slopes, and can be guided or directed through the latter during assembly in such a way that it can slide along the supporting wall.Preferably, the sealing arrangement further comprises at least one displaceable latch, by means of which the one housing part can be locked, in particular pressed, with the other housing part. The at least one latch preferably has at least one link which is arranged so as to be able to interact with the at least one locking part. If, for example, the first housing part is provided with the locking part, the at least one latch can be arranged displaceably on the second housing part. When the two housing parts are assembled, the locking part can engage in a slotted link of the bolt and, when the bolt is displaced, pull the first and the second housing part towards one another.At least one support wall can be arranged on a seal seat which projects from the remaining housing part and on which the seal, at least the region of the seal which bears against the support wall, rests and / or is pressed in the assembled state.Preferably, two support walls are arranged on a sealing seat, wherein the two support walls are spaced apart from one another transversely to the mounting direction and run parallel to one another. The two support walls can be arranged at the same height in the mounting direction. At the end in the mounting direction, which does not come into contact first with the other housing part during mounting, i.e. at a so-called rear end, the two support walls can be connected to one another by a web, so that they overall form a U-shape.The at least one sealing seat can be beveled with respect to the mounting direction, so that it widens in the mounting direction. As a result, the pressure of the two housing parts on one another and a compression of the sealing element associated therewith can increase when the two housing parts are connected to one another.The at least one supporting wall can space apart the other housing part in the assembled state. As a result, the distance between the two housing parts can be defined by the supporting wall at least in the region of the seal. This can prevent the seal from compressing excessively in the assembled state.Preferably, at least the housing part, which has at least one support wall, has at least two sealing seats lying opposite one another over the remaining housing part, each with at least one support wall. Between the at least two sealing seats, preferably at least one plug receptacle of the housing part extends.Particularly preferably, the sealing arrangement according to the invention is used for a door connector for a motor vehicle door. In this case, the sealing arrangement can serve for the sealed passage of at least one electrical line through a wall of the motor vehicle door. A first housing part, which has at least one supporting wall, can be fixedly mounted on the door and project through the wall of the door, so that a plug receptacle of the housing part can be reached from the outside. The second housing part can be provided with the at least one seal and have a mating connector and can be connected to the first housing part. When the two housing parts are connected, a main body of the seal can abut against the wall of the door, while regions extending away from the main body can abut against the supporting walls of the first housing part. The second housing part can form a cap with which the first housing part can be covered.The invention is explained in more detail below by way of example on the basis of an advantageous embodiment with reference to the drawings. The combination of features illustrated by way of example in the embodiment can be supplemented by further features according to the above explanations in accordance with the properties of the sealing arrangement according to the invention which are necessary for a specific application. Also, also in accordance with the above explanations, individual features can be omitted in the described embodiment if the effect of this feature is not important in a specific application. In the drawings, the same reference numerals are always used for elements of the same function and / or the same structure.The following are shown: FIG. 1 is a cross-section through a sealing arrangement according to the invention; FIG. 2 shows a perspective representation of the sealing arrangement from FIG. 1 from the outside in an assembled state; FIG. 3 shows a perspective illustration with a view into the interior of a housing part with a sealing element arranged therein; FIG. 4 shows a perspective illustration of a housing part with support walls, wherein the housing part is illustrated with sealing elements abutting against it; FIG. 5 shows the housing part and the sealing elements from FIG. 4 additionally with a displaceable latch; FIG. 6 is an enlarged view of a sealing seat with support walls and a locking part; FIG. 7 shows the sealing seat from FIG. 6 with the indicated sealing element; and FIG. 8 is a side view of the housing part having the support walls transversely to the mounting direction.The general function of the embodiment of the sealing arrangement is described first below with reference to FIGS. 1 to 5. The structure and mode of operation of the support walls according to the invention will be explained in more detail below with reference to FIGS. 6 to 8. All figures show views of the same embodiment. A coordinate system is drawn in each figure in order to be able to more easily relate the representations of the individual figures to one another.The sealing arrangement 1 according to the invention has a first housing part 3 and a second housing part 5. The assignment of the housing parts 3 and 5 described below is chosen merely as an example. Both housing parts can be moved along a mounting direction M and assembled together along this mounting direction M.The embodiment shown in the figures is merely an example of a door connector for a motor vehicle door. Thus, the first housing part 3 can be firmly connected to a vehicle door and project through a wall 7 (indicated merely by dashed lines) of a vehicle door. The housing part 3 can be provided, for example, with a plug or a socket which can be connected to a mating plug element which is configured in a complementary manner thereto and can be arranged in the second housing part 5. In other words, the second housing part 5 can be plugged onto the first housing part 3, wherein the two plug elements configured in a complementary manner to one another are connected.In order to obtain a sealed connection, the sealing arrangement 1 is provided with a sealing element 9. The sealing element 9 is arranged between the two housing parts 3 and 5 at least in the plugged-together state 11, as is shown in FIG. 2. In the embodiment shown by way of example, the sealing element 9 is fitted on the second housing part 5 such that it cannot be lost. The sealing element 9 is preferably injection-molded onto the second housing part 5 by an injection molding method. Alternatively, the sealing element 9 can also be manufactured separately and subsequently attached to the second housing part 5, for example by adhesive bonding.In the assembled state 11, a sealed connection can be produced between the two housing parts 3 and 5. In particular, an outwardly sealed connection can be formed between the interior of the two housing parts 3 and 5 and the interior of the aforementioned motor vehicle door. For this purpose, the sealing element 9 has a main body 13 running around transversely to the mounting direction M. The main body 13 can rest against the wall 7 in the assembled state 11.Both the first housing part 3 and the second housing part 5 extend, at least in the assembled state 11, along a longitudinal direction 15 which runs parallel to the X axis in the figures and a transverse direction 17 which runs along the Y axis in the figures. The longitudinal direction 15 and the transverse direction 17 each run transversely to the mounting direction M, which in turn runs parallel to the Z direction in the figures. The housing parts 3 and 5 extend longitudinally along the longitudinal direction 15, but this is only exemplary.The main body 13 of the sealing element 9 extends in a rectangular shape, wherein long sides 19 run parallel to the longitudinal direction 15 and short sides 21 run parallel to the transverse direction 17.The second housing part 5 is provided on its sides running parallel to the longitudinal direction 15 with a respective double wall 23, which each expose a cavity 25, wherein a part of a displaceable latch 27 can be accommodated in each of the cavities 25.The latch 27 is held displaceably transversely to the mounting direction M and parallel to the longitudinal direction 15. The latch 27 has a bridge 29 which extends parallel to the transverse direction 17 and connects the two limbs 31, one of which is accommodated in a cavity 25 of a double wall 23, to one another and on which the latch 27 can be actuated. The latch 27 is partially shown in FIGS. 1 to 3 and almost completely shown in FIG. 5.The latch 27 has in each of its legs 31 two slotted links 33 which run at a flat angle to the longitudinal direction 15. The slotted guides 33 of both legs 31 extend in the direction of the bridge 29 and in this case away from the main body 13 of the sealing element 9.In the assembled state 11, locking parts 35 are arranged from the first housing part 3 in the slotted guides 33. The locking parts 35 are formed monolithically with the remaining first housing part 3. Preferably, they are substantially cylindrical, wherein their cylinder axes extend parallel to the transverse direction 17 away from two opposite longitudinal walls 37 of the first housing part 3. One locking part 35 each is arranged in a slotted link 33.When the sealing arrangement 1 is assembled, a pressure on the bridge 29 of the latch 27 results in the latch 27 pulling the second housing part 5 along the assembly direction M towards the first housing part 3 and pressing against it.The slide blocks 33 are each provided with a locking position 39, at which the locking parts 35, which function as slide blocks, can be arranged when the latch 27 is arranged in an end position. This is illustrated in FIG. 5. At the locking positions 39, the slotted guides 33 are each provided with a seat for the locking part 35, wherein the seat is formed by a depression extending in the direction of the main body 13.When the first housing 3 is connected to the second housing by the use of the latch 27, the locking members 35 are moved relative to the second housing 5. In order to permit this movement, the second housing part 5 is provided with recesses 43 on inner walls 41 of the double wall 23. In this case, a respective recess 43 for a locking part 35 is provided. In the embodiment shown, consequently, two recesses 43 are provided on an inner wall 41.The recesses 43 extend parallel to the mounting direction M and can additionally serve to guide the second housing part 5 along the mounting direction M by the interaction of the recesses 43 with the locking parts 35.In order to enable a sealed connection between the two housing parts 3 and 5 despite the recesses 43, the sealing element 9 has loops 45 which are preferably monolithically connected to the main body 13 and extend away from the latter along the mounting direction M. The loops 45 surround the recesses 43 and abut against the inner walls 41 of the second housing part.The locking parts 35 can move within the loops 45 since the loops 45 leave the recesses 43 open to such an extent that the movement of the locking parts 35 along the mounting direction M can take place unimpeded.Each of the loops 45 has two mutually parallel sections 47, which run substantially parallel to the mounting direction M and are spaced apart from one another along the longitudinal direction 15. In the assembled state 11, the loops 45 extend around the locking parts 35.In the assembled state 11, the loops 45, in particular their parallel sections 47, bear against the first housing part 3. This situation is illustrated in FIGS. 4 and 7, wherein the second housing part 5 and the displaceable latch 27 have been omitted for the sake of better clarity.The first housing part 3 has sealing seats 49, which are arranged on the side walls 37 and are accessible from the outside. The sealing seats 49 are predetermined regions against which the sealing element 9, in particular its loops 45, can abut in the assembled state 11.The seal seats 49 may protrude outwardly from the side walls 37. They are preferably formed monolithically with the remaining first housing part 3. The sealing seat 49 forms a bearing surface 51 for a region of the sealing element 9, in particular for its loop 45.The bearing surfaces 51 can be beveled in such a way that the sealing seats 49 taper in a cross section transverse to the longitudinal direction 15 along the mounting direction M towards the locking parts 35. This is illustrated in FIG. 8. The locking parts 35 are arranged at the end of the sealing seats 49 that points toward the second housing part 5 as viewed in the mounting direction M. Along the longitudinal direction 15, the locking parts 35 can be arranged centrally on the sealing seats 49.In the assembled state, in particular the loops 45 of the sealing element 9 are pressed together between the housing parts 3 and 5. The loops 45 that are captively connected to the second housing part 5 are pressed against the sealing seats 49.In order to prevent the parallel sections 47 from turning over to different sides or from twisting these sections 47, each sealing seat 49 is provided with two supporting walls 53.The loops 45, in particular their parallel sections 47, can abut against the supporting walls 53 and be supported on them. As a result, the rotation of the sealing element 9 at least in the direction of the supporting walls 53 can be prevented. The safety of the sealed connection can thus be increased by the support walls 53.The support walls 53 each point with their surface normal 55 transversely to the mounting direction. In the embodiment shown by way of example, the surface normals 55 of the support walls 53 are each substantially parallel to the longitudinal direction 15. In the assembled state 11, the support walls 53 consequently lie in the interior of the loops 45 or are surrounded by them.Alternatively, it is also possible to interchange the arrangement, so that the parallel sections 47 or the loops 45 lie between two supporting walls 53 and consequently lie against the surfaces of each supporting wall 53 opposite the surfaces 57. In a further alternative embodiment, each parallel section 47 can also be arranged between two supporting walls 53 flanking this section 47.The support walls 53 extend substantially parallel to the mounting direction M and are spaced apart from one another in the longitudinal direction 15. At their ends opposite the locking part 35, the two support walls can be connected to one another by a web 59, with the result that the two support walls 53 together with the web 59 overall form a continuous U.The region around the web 59 can be bent away from the remaining housing part 3 together with the sealing seat 49 in such a way that, as seen in the cross section in the longitudinal direction 15, the sealing seat 49 and the supporting walls 53 located thereon form an L-shape with the web 59. This is illustrated, for example, in FIG. 8.The support walls 53 are preferably formed monolithically with the first housing part 3. The support walls 53 can each be formed by a rib 61 or constitute a part of the rib 61. The rib 61 or the supporting wall 53 can project outwards from the remaining housing part 3, in particular from the sealing seat 49.Free ends of the U-shape or the ends 63 of the support walls 53 opposite the web 59 can end approximately at a height with the locking part 35, as seen in the mounting direction M. At these ends 63, the support walls 53 are preferably beveled for easier connection to the second housing part 5 and the sealing element 9 fastened thereto.The sealing element 9 can be guided by the beveled ends 63 in such a way that it slides along the support walls 53 and comes to rest on the surfaces 57 provided for this purpose. It is particularly advantageous if the ends 63 are beveled on two sides.For this purpose, the ends 63 are first provided with a first run-on slope 65, through which the supporting wall 53, which protrudes outwards from the rest of the sealing seat 49, is guided onto a plane with the rest of the sealing seat 49. As a result, the supporting wall 53 is consequently tapered along the transverse direction 17.It is also advantageous if a second run-on slope 67 is present at each end 63, by means of which each supporting wall 53 is also tapered in the longitudinal direction 15, at least on the side with the surface 57. The two run-on slopes 65 and 67, which also merge into one another and can thereby form a round shape, make it easier to connect the two housing parts 3 and 5 and prevent damage to the sealing element 9.As already evident from the above description, the parallel sections 47 of the loops 45 are the regions of the sealing element 9 which, in the assembled state 11, are supported on the supporting walls 53. These regions are preferably elongated and extend away from the main body 13 of the sealing element 9.The sealing element 9 is preferably formed from a softer material than the remaining second housing part 5 and preferably also than the first housing part 3. The support wall 53 according to the invention can prevent the twisting or turning over of at least the regions 69 which bear against the support walls 53, as a result of which the safety of the sealed connection can be increased.A further advantage of the support walls 53 according to the invention is that the second housing part 5 can be spaced apart from the first housing part 3 by the support walls 53, or the distance between the two housing parts can be defined by the support walls 53. By means of this defined distance, the contact pressure can in turn be adjusted to the regions of the sealing element 9. In this way, it can be ensured that the sealing element 9 is not compressed too much, at least in the region, and is thus damaged.In the embodiment described above, the support walls 53 are always arranged on the first housing part 3 and the sealing element 9 is always arranged on the second housing part 5. In alternative embodiments, however, this can also be the reverse, or mixed forms can also be provided in which both housing parts are provided with support walls and both housing parts are provided with sealing elements 9 provided for this purpose, respectively.In the embodiment described above, a receiving space 71 for a plug element also extends between the side walls 37 of the first housing part. In alternative embodiments, however, the receiving space 71 can also serve for receiving other objects. In a further alternative embodiment, a plug element could also be arranged on another region of the housing part 3.Reference numerals denote reference numerals1 Sealing arrangement 3 First housing part 5 Second housing part 7 Wall 9 Sealing element 11 Assembled state 13 Main body 15 Longitudinal direction 17 Transverse direction 19 Long sides 21 Short sides 23 Double wall 25 Cavity 27 Latch 29 Bridge 31 Leg 33 Slide members 35 Locking parts 37 Side walls 39 Locking position 41 Inner walls 43 Recess 45 Loop 47 Parallel portions 49 Sealing seat 51 Contact surface 53 Support walls 55 Surface normal 57 Surface 59 Web 61 Rib 63 Ends 65 First run-on slope 67 Second run-on slope 71 Receiving space M Assembly direction

Claims

Sealing arrangement (1) having a first housing part (3), a second housing part (5) which is movable relative thereto in an assembly direction (M), and a sealing element (9) which can be arranged between the two housing parts (3, 5), characterized in that at least one of the two housing parts (3, 5) is provided with at least one supporting wall (53), the surface normal (55) of which points transversely with respect to the assembly direction (M) and on which the at least one sealing element (9) bears at least in sections in a assembled state (11) of the first and second housing parts (3, 5).Sealing arrangement (1) according to Claim 1, characterized in that the at least one supporting wall (53) runs substantially in the mounting direction (M).Sealing arrangement (1) according to claim 1 or 2, characterised in that the at least one supporting wall (53) is part of a rib (61).Sealing arrangement (1) according to one of Claims 1 to 3, characterized in that the at least one sealing element (9) is attached to one of the two housing parts (3, 5).Sealing arrangement (1) according to one of Claims 1 to 4, characterized in that the at least one sealing element (9) is attached to the housing part (3, 5), which is not provided with a supporting wall (53).Sealing arrangement (1) according to one of Claims 1 to 5, characterized in that the supporting wall (53) is formed monolithically with the remaining housing part (3, 5) which has the supporting wall (53).Sealing arrangement (1) according to one of Claims 1 to 6, characterized in that at least one region of the sealing element (9) which, in the assembled state (11), is supported on the supporting wall (53) is substantially elongate.Sealing arrangement (1) according to one of Claims 1 to 7, characterized in that at least one region of the sealing element (9) which, in the assembled state (11), is supported on the supporting wall (53) is part of a loop (45).Sealing arrangement (1) according to claim 8, characterised in that in the assembled state (11), at least two support walls (53) are surrounded by a loop (45).Sealing arrangement (1) according to one of Claims 7 to 9, characterized in that the sealing element (9) has a main body (13) from which the at least one region supporting on the supporting wall (53) extends away.Sealing arrangement (1) according to one of Claims 1 to 10, characterized in that at least one of the two housing parts (3, 5) has at least one locking part (35).Sealing arrangement (1) according to claim 11 and claim 8, characterised in that the at least one loop (45), in the assembled state (11), runs at least in sections around the at least one locking part (35).Sealing arrangement (1) according to one of Claims 1 to 12, characterized in that the at least one supporting wall (53) has at least one run-on slope (65, 67) for easier connection to the other housing part (3, 5).Sealing arrangement (1) according to one of Claims 1 to 13, characterized in that the sealing arrangement (1) furthermore has at least one displaceable bolt (27), by means of which the one housing part (3, 5) can be locked to the other housing part (3, 5).Sealing arrangement (1) according to claim 14 and claim 11, characterised in that the at least one displaceable latch (27) has at least one slotted link (33) which is arranged so as to be able to cooperate with the at least one locking part (35).

Images