Housing for multi-point lock

Abstract

Auxiliary housing for multi-point lock Auxiliary housing (1) for multi-point lock, comprising: - a box (2); - a driver (5) movable between a first position and a second position relative to the box (2); - a bolt (10) movable between an unlocking position and at least one locking position, - a blocker (15) movable between a bolt unlocking position and at least one bolt locking position, in which a locking actuator (6) is configured to cooperate with a bolt actuating portion (11) to position the bolt (10) in the unlocking position when the driver (5) is in the first position and in said at least one locking position when the driver (5) is in the second position;a locking actuator (7) being configured to cooperate with a blocker actuating portion (16) to position the blocker (15) in said at least one bolt locking position to lock the bolt (10) in said at least one locking position, the locking actuator (7) also being configured to cooperate with a blocker actuating portion (16) to position the blocker (15) in the bolt unlocking position. Figure for abstract: Fig. 1;

Description

Title of the invention: Housing for multi-point lock Technical field

[0001] The present invention relates to the field of construction, whether private or professional. In particular, the invention relates to an auxiliary housing for a lock and a lock comprising such an auxiliary housing. Prior art

[0002] Multi-point locks generally comprise a middle housing, of the type which comprises for example an operating lever, and at least one auxiliary housing, actuated by the middle housing, to provide several fixing points at different locations.

[0003] Thus, locking the central housing causes locking of the auxiliary housing(s), and vice versa for unlocking.

[0004] In certain cases, due to friction of a bolt of an auxiliary housing in its strike plate, the locking and unlocking of the lock may be complicated or even faulty. Statement of the invention

[0005] There is a need for a multi-point lock auxiliary housing that improves and facilitates locking of the lock, while maintaining locking security of the entire lock. Summary of the invention

[0006] The present invention meets this need thanks to, according to one of its aspects, an auxiliary housing for a multi-point lock, comprising: - a chest; - a driver movable between a first position and a second position relative to the trunk, the driver comprising at least one locking actuator and at least one blocking actuator; - a main bolt movable between an unlocking position and at least one locking position, said main bolt comprising at least one main bolt actuating portion, - a blocker movable between a main bolt unlocking position and at least one main bolt locking position, said blocker comprising at least one blocker actuation portion, wherein said at least one locking actuator is configured to cooperate with said at least one main bolt actuating portion to position the main bolt in said unlocking position when the driver is in the first position and in said at least one locking position when the driver is in the second position; said at least one blocking actuator being configured to cooperate with said at least one blocker actuation portion to position the blocker in said at least one main bolt blocking position to block the main bolt in said at least one locking position, said at least one blocking actuator also being configured to cooperate with said at least one blocker actuation portion to position the blocker in the main bolt unlocking position.

[0007] By using a main bolt and a blocker actuated by a driver comprising at least one locking actuator and at least one blocking actuator, locking and unlocking of the auxiliary housing are simplified. Main bolt

[0008] Said main bolt actuating portion may comprise a locking follower surface, said locking actuator comprising a locking cam, said locking cam being configured to come into contact with said locking follower surface, at least for certain positions of the driver and / or the main bolt, for moving the main bolt between the locking and unlocking positions.

[0009] The use of a follower surface allows both good synchronization of the movements of the driver and the main bolt without increasing the closing force that the user must apply.

[0010] Said locking follower surface may comprise a locking segment and an unlocking segment, said locking cam being configured to come into contact with the locking segment for moving the main bolt into said at least one locking position, said locking cam being configured to come into contact with the unlocking segment for moving the main bolt into the unlocking position.

[0011] The locking segment may be configured to allow a break in contact with the locking cam when the driver moves from the first position to the second position, in particular when the transition of the main bolt from the unlocking position to said at least one locking position is completed before the driver is in the second position. This may in particular be the case when the main bolt rubs in the strike plate, which prevents its total deployment. This allows the auxiliary housing to be locked correctly, by positioning the driver in the second position, even when the main bolt rubs in the strike plate.

[0012] The auxiliary housing may comprise a return member for the main bolt configured to maintain contact between the main bolt follower surface and the locking cam, at least for certain positions of the driver and / or the main bolt.

[0013] The return member ensures good synchronization of the movements of the driver and the main bolt.

[0014] The locking cam may comprise a sliding surface intended to be in contact with the main bolt at least for certain positions of the main bolt.

[0015] The use of a sliding surface makes it possible to reduce the force required to move the main bolt between the unlocking position and said at least one locking position.

[0016] The sliding surface may be a rotating element, for example a ring.

[0017] The material of the sliding surface may be chosen from the group consisting of steel, brass and Teflon, and a combination of these.

[0018] The material of the main bolt is preferably steel so as to obtain a contact interface with the sliding surface among one of the following pairs: steel / steel, steel / brass, steel / bronze and steel / Teflon.

[0019] The sliding surface may be in contact with the locking follower surface and / or a side wall of the main bolt.

[0020] The main bolt may be movable between an unlocking position and at least two locking positions, wherein said at least one locking actuator is configured to cooperate with said at least one main bolt actuating portion to position the main bolt in at least one of the unlocking positions when the driver is in the first position, said at least one locking actuator being configured to cooperate with said at least one blocker actuating portion to position the blocker in said at least one main bolt locking position to block the main bolt in at least one of the locking positions.

[0021] In one embodiment, the main bolt has three locking positions.

[0022] Preferably, the main bolt comprises at least one first relief and the blocker comprises at least one second relief, the first relief and the second relief being configured to engage with each other when the main bolt is in at least one locking position and the driver is in the second position to maintain the position of the main bolt.

[0023] The main bolt may comprise at least two first reliefs. In particular, the main bolt may comprise a first relief per locking position.

[0024] The first relief may comprise an anti-return flank, which prevents the disengagement of the first relief in the second relief when the main bolt is in said at least one locking position and the driver is in the second position.

[0025] This anti-return blank ensures good locking of the main bolt and secures the closing of the lock at least at the level of the auxiliary housing.

[0026] Having a plurality of locking positions makes it possible to ensure locking of the main bolt, and therefore of the lock, even in the event that the main bolt cannot fully deploy, for example when the strike plate is not deep enough and / or there is friction between the strike plate and the main bolt.

[0027] The main bolt may be a hook bolt. A "hook" bolt is understood to mean that the bolt comprises a portion forming a hook configured to cooperate with a strike plate. The use of a hook bolt provides good resistance to tearing, when engaged in the strike plate, and increases the hold in the strike plate.

[0028] The main bolt may comprise a head and a leg, the head being configured to engage a striker when the main bolt is in the at least one locking position.

[0029] The main bolt can pass between the locking position and said at least one unlocking position by rotation, in particular by rotation in a vertical plane, in particular around an axis passing through the leg of the main bolt. Blocker

[0030] Said blocker actuating portion may comprise a blocking follower surface, said blocking actuator comprising a blocking cam, said blocking cam being configured to come into contact with said blocking follower surface, at least for certain positions of the driver and / or the blocker.

[0031] The use of a follower surface allows both good synchronization of the movements of the driver and the blocker without increasing the closing force that the user must apply.

[0032] Said locking follower surface may comprise a locking segment and an unlocking segment, said locking cam being configured to come into contact with the locking segment for moving the blocker into said at least one locking position, said locking cam being configured to come into contact with the unlocking segment for moving the blocker into the unlocking position.

[0033] The locking segment may be configured to temporarily break contact with the locking cam when the driver moves from the first position to the second position and the main bolt moves from the unlocking position to the at least one locking position. This allows the blocker to freely move from one first relief of the main bolt to another.

[0034] The housing may comprise a return member of the blocker configured to maintain contact between the blocking follower surface and the blocking cam, at least for certain positions of the driver and / or the blocker. Secondary bolt

[0035] The housing may comprise a secondary bolt, movable between a second unlocking position and a second locking position.

[0036] The secondary bolt may have a circular, parallelepipedal, for example rectangular or square, ovoidal cross-section, and a combination of these, preferably circular.

[0037] As a further variant, the secondary bolt may comprise a plurality of branches.

[0038] The main bolt may comprise a secondary bolt actuator, said secondary bolt actuator being configured to position the secondary bolt in said second unlocking position when the main bolt is in the unlocking position and in said second locking position when the main bolt is in said at least one locking position.

[0039] The secondary bolt can pass between the secondary locking position and the unlocking position by a translation, in particular in a vertical plane, preferably in the same vertical plane as that of the rotation of the main bolt. Chest

[0040] The trunk may comprise an upper unlocking part and a lower locking part, the driver being configured to move from the upper part to the lower part when the driver moves from the first position to the second position, the driver also being configured to move from the lower part to the upper part when the driver moves from the second position to the first position.

[0041] The blocker and said at least one blocking actuator can be positioned in the upper part, the main bolt and said at least one locking actuator being positioned in the lower part. Coach

[0042] The driver can be moved between the first position and the second position by an actuator of the lock, in particular an actuator connected to a middle housing.

[0043] The driver can be moved between the first position and the second position by translation.

[0044] The driver may comprise a plate on which at least the locking actuator and the blocking actuator are arranged. Multi-point lock

[0045] The invention also relates, according to another of its aspects, in combination with the above, to a multi-point lock, comprising at least one auxiliary housing as defined above and a middle housing.

[0046] The lock provides optimal security against break-ins by offering several locking points over the overall height of a door block, a French window or from a window, without complicating use.

[0047] The lock may comprise a plurality of locking points formed by said at least one auxiliary housing and the middle housing, in particular between 2 and 10, for example 4 locking points on the top of the lock, 4 locking points on the bottom of the lock and 1 locking point at the middle housing. Brief description of the drawings

[0048] The invention may be better understood by reading the detailed description which follows, non-limiting examples of its implementation, and by examining the attached drawing, in which

[0049] [Fig.l] illustrates in cross-section an example of an auxiliary housing according to the invention,

[0050] [Fig.2] is an enlargement of [Fig.l] according to II,

[0051] [Fig.3] is an enlargement of [Fig.l] according to III.

[0052] [Fig.4] is a view similar to [Fig.l] in which the main bolt is in a locking position,

[0053] [Fig.5] is a view similar to [Fig.l] in which the main bolt is in two other locking positions,

[0054] [Fig.6] is a view similar to [Fig.l] in which the trainer begins a movement from a first position to a second position,

[0055] [Fig.7] is a view similar to [Fig.6] in which the trainer continues his movement from a first position to a second position,

[0056] [Fig.8] is a view similar to [Fig.7] in which the trainer continues his movement from a first position to a second position, and

[0057] [Fig.9] is an example of a multi-point lock according to the invention. Detailed description

[0058] In the remainder of the description, elements that are identical or have identical functions bear the same reference sign. For the sake of brevity in this description, they are not described with reference to each of the figures, only the differences between the embodiments being described.

[0059] In the figures, the actual proportions have not always been respected, for the sake of clarity.

[0060] Figures 1 to 8 illustrate an example of an auxiliary housing 1 according to the invention.

[0061] The auxiliary housing 1 comprises a box 2, substantially rectangular.

[0062] The trunk 2 comprises for example an upper part H and a lower part B, each part representing approximately 50% of the height of the trunk 2.

[0063] The auxiliary housing 1 comprises a driver 5, movable between a first position ([Fig.l]) and a second position (figures 4 and 5). The driver 5 moves, in this example, between the first and second position by a translation in the trunk 2 along a vertical axis V going from the upper part to the lower part.

[0064] The trainer 5 is for example in the form of a plate whose height, along the vertical axis V, is greater than 50% of the height of the trunk 2.

[0065] The driver 5 comprises, in a lower part, a locking actuator 6 and, in an upper part, a blocking actuator 7, which comprises for example a cam, the functions of which will be described below.

[0066] The auxiliary housing 1 also comprises a main bolt 10, in this example a hook bolt, movable between an unlocking position ([Fig.l]) and at least one locking position (figures 4 and 5), in this example in three locking positions.

[0067] In [Fig.4], the main bolt 10 is in the maximum locking position, i.e. the position where the hook 10 protrudes the furthest from the box 2.

[0068] In [Fig.5] a), the main bolt 10 is in the minimum locking position, i.e. the position where the hook 10 protrudes the least from the box 2.

[0069] In [Fig.5] b), the main bolt 10 is in the middle locking position, i.e. the position where the hook 10 comes out of the box 2 in an intermediate position.

[0070] The choice of the locking position can be done automatically, for example depending on any friction in the strike plate and the depth of the strike plate.

[0071] Alternatively, or in combination, the choice of the locking position may be made by a mechanical adjustment. Such a mechanical adjustment may also make it possible to choose a preferred locking position.

[0072] For all locking positions of the main bolt 10, the driver 5 is in the same second position. In other words, whatever the locking position of the main bolt 10, the possibilities of movement of the driver 5 are identical and transparent to the user.

[0073] The main bolt 10 further comprises a main bolt actuating portion 11.

[0074] The auxiliary housing 1 also comprises a blocker 15 movable between a position for unlocking the main bolt ([Fig.l]) and at least one position for blocking the main bolt (figures 4 and 5),

[0075] The main bolt 10 comprises a head 26 with a hook and a leg 27, which extends in particular towards the lower part.

[0076] The main bolt 10 can move between the unlocking position and one of the locking positions by rotation, in particular around an axis at the level of the leg 27 of the main bolt 10.

[0077] The rotation of the main bolt 10 takes place in a vertical plane.

[0078] The blocker 15 comprises a main bolt actuating portion 16.

[0079] As illustrated in the enlargement of [Fig.2], the actuating portion of the blocker 16 comprises a blocking follower surface 17 which comprises a blocking segment 18 and an unlocking segment 19.

[0080] For example, the unlocking segment 19 is substantially rectilinear and extends substantially along the vertical axis V when the blocker 15 is in the unlocking position.

[0081] For example, the locking segment 18 is curved, in particular in the shape of a C.

[0082] The auxiliary housing 1 also comprises a return member 20 which makes it possible to maintain contact between the locking follower surface 17 and the cam of the locking actuator 7.

[0083] The return member 20 may be of the elastic deformation type to achieve the return of the part.

[0084] The return member 20 comprises in particular a torsion spring 21, one end of which is fixed to the housing 1.

[0085] The locking actuator 6 comprises a sliding ring having a surface 8 in contact with a side wall of the main bolt 10. The sliding ring has a cam 9 at its center.

[0086] The actuating portion of the main bolt 11 comprises, as illustrated in [Fig. 3], a locking follower surface 12 comprising a locking segment 13 and an unlocking segment 14.

[0087] The locking segment 13 comprises a substantially rectilinear portion extending along the vertical axis V when the main bolt 10 is in the unlocked position.

[0088] The unlocking segment 14 comprises a rectilinear portion extending along the vertical axis V when the main bolt 10 is in the unlocking position and a curved C-shaped portion at the base of the rectilinear portion.

[0089] The auxiliary housing 1 also includes a return member for the main bolt 10, not shown, which makes it possible to maintain contact between the locking follower surface 12 and the cam 9.

[0090] The auxiliary housing 1 may also comprise a secondary bolt 25, for example cylindrical, movable between a second unlocking position ([Fig.l]) and a second locking position (Figures 4 and 5). For example, the secondary bolt 25 moves by translation between the locking position and the unlocking position, in particular perpendicular to the vertical axis V.

[0091] The translation of the secondary bolt 25 is preferably done in the same vertical plane as the rotation of the main bolt 10.

[0092] The main bolt 10 comprises a secondary bolt actuator 30, for example formed by a connecting rod. Said secondary bolt actuator 30 is configured to po positioning the secondary bolt 25 in said second unlocking position when the main bolt 10 is in the unlocking position and in said second locking position when the main bolt 10 is in said at least one locking position.

[0093] As illustrated in Figures 4 and 5, when the main bolt 10 is in a locking position and the blocker 15 is in the locking position, the blocker 15 blocks the main bolt 10 in the locking position.

[0094] For this purpose, the blocker 15 comprises a projecting relief 35 at its base which cooperates with a hollow 36 of the main bolt 10 by engaging therein.

[0095] In this example, the main bolt 10 has three recesses 36, i.e. one recess 36 per locking position of the main bolt 10.

[0096] Each hollow 36 comprises a first flank 37 and a second flank 38, the slope of the first flank 37 being greater than that of the second flank 38, according to the direction of movement of the head 26 of the main bolt 10. These flanks 37 and 38 allow operation close to that of a rack which facilitates the engagement of the relief 35 in the hollows 36, but complicates its removal by the sole movement of the main bolt 10, in particular when the driver 5 is in the second position.

[0097] This rack shape thus ensures a security guarantee when the main bolt 10 is in one of the locking positions.

[0098] When the main bolt 10 is in the unlocked position, the relief 35 is not engaged in one of the hollows 36.

[0099] In Figures 6 to 8, the transition of the driver 5 from the first position to the second position, and its consequences, are illustrated.

[0100] When the driver 5 begins its movement from the first position to the second position, the cam 9 of the sliding ring slides on the follower surface 12 of the main bolt 10 at the unlocking segment 14.

[0101] This downward sliding, combined with the force of the return member, turns the main bolt 10 around its leg 27 and thus allows the head 26 to exit the box 2 to engage in the strike plate.

[0102] The sliding continues until the cam 9 is in contact with the locking segment 13.

[0103] As regards the blocker 15, at the start of the movement of the driver 5, between [Fig.2] and [Fig.6], the cam of the blocking actuator 7 slides on the unlocking segment 19 of the blocking follower surface 17.

[0104] This downward sliding, combined with the force of the return member, causes the blocker 15 to rotate so as to gradually bring the relief 35 towards the main bolt 10.

[0105] The cam of the locking actuator 7 then slides on the locking segment 18 of the blocking follower surface 17.

[0106] At this moment, the relief 35 is in position to engage with one of the hollows 36 of the main bolt 10.

[0107] In the event that nothing prevents the complete rotation of the main bolt 10 and that the latter is going to position itself in the maximum locking position, the relief 35 will temporarily engage in the first hollows 36, corresponding to the minimum and middle locking positions, to definitively engage in the last hollow 36.

[0108] Conversely, when the main bolt 10 cannot be fully deployed, and it is going to position itself in the minimum or middle locking position, the relief 35 engages in one of the first two hollows 36.

[0109] Similarly, in this eventuality, the contact between the cam 9 of the sliding ring and the follower surface 12 is broken. Indeed, the main bolt 10 is maintained in the minimum or middle locking position, and the sliding ring continues to move with the driver 5. Of course, when the driver moves from the second position to the first position, the contact between the cam 9 of the sliding ring and the follower surface 12 will be reestablished, from a certain position of the driver 5.

[0110] The transition from second position to first is done in the opposite manner to what has just been described.

[0111] An example of a multi-point lock 50 according to the invention is illustrated in [Fig.9].

[0112] The multi-point lock 50 comprises a central housing 51, comprising in particular a lever 52, and two auxiliary housings 1.

[0113] Of course, the invention is not limited to the example which has just been described.

[0114] The secondary bolt 25 could be different, for example of rectangular, triangular, ovoidal section, or a combination of these.

[0115] The main bolt 10 may have a different number of locking positions, in particular between 2 and 10.

[0116] The auxiliary housing may comprise a plurality of second bolts 25, for example between 2 and 5.

Claims

Claims

1. Auxiliary housing (1) for multi-point lock, comprising: - a box (2); - a driver (5) movable between a first position and a second position relative to the box (2), the driver (5) comprising at least one locking actuator (6) and at least one blocking actuator (7);- a main bolt (10) movable between an unlocking position and at least one locking position, said main bolt comprising at least one main bolt actuating portion (11), - a blocker (15) movable between a main bolt unlocking position and at least one main bolt locking position, said blocker (15) comprising at least one blocker actuating portion (16), wherein said at least one locking actuator (6) is configured to cooperate with said at least one main bolt actuating portion (11) to position the main bolt (10) in said unlocking position when the driver (5) is in the first position and in said at least one locking position when the driver (5) is in the second position;said at least one blocking actuator (7) being configured to cooperate with said at least one blocker actuating portion (16) to position the blocker (15) in said at least one main bolt blocking position to block the main bolt (10) in said at least one locking position, said at least one blocking actuator (7) also being configured to cooperate with said at least one blocker actuating portion (16) to position the blocker (15) in the main bolt unlocking position.;

2. Auxiliary housing (1) according to claim 1, wherein said main bolt actuating portion (11) comprises a locking follower surface (12), said locking actuator (6) comprising a locking cam (9), said locking cam (9) being configured to come into contact with said locking follower surface (12), at least for certain positions of the driver (5) and / or the main bolt (10), for moving the main bolt (10) between the locking and unlocking positions.

3. Auxiliary housing (1) according to the preceding claim, wherein said locking follower surface (12) comprises a locking segment (13) and an unlocking segment (14), said locking cam (9) being configured to come into contact with the locking segment (13) for moving the main bolt (10) into said at least one locking position, said locking cam (9) being configured to come into contact with the unlocking segment (14) for moving the main bolt (10) into the unlocking position.

4. Auxiliary housing (1) according to one of claims 2 or 3, comprising a main bolt return member configured to maintain contact between the main bolt follower surface (12) and the locking cam (9), at least for certain positions of the driver (5) and / or the main bolt (10).

5. Auxiliary housing (1) according to any one of claims 2 to 4, in which the locking cam (9) comprises a sliding surface intended to be in contact with the main bolt (10) at least for certain positions of the main bolt (10).

6. Auxiliary housing (1) according to the preceding claim, wherein the sliding surface is a rotating element.

7. Auxiliary housing (1) according to the preceding claim, wherein the sliding surface is in contact with the locking follower surface (12) and / or a side wall of the main bolt (10).

8. Auxiliary housing (1) according to any one of the preceding claims, wherein said blocker actuating portion (16) comprises a blocking follower surface (17), said blocking actuator (7) comprising a blocking cam, said blocking cam being configured to come into contact with said blocking follower surface (17), at least for certain positions of the driver (5) and / or the blocker (15).

9. Auxiliary housing (1) according to the preceding claim, wherein said locking follower surface (17) comprises a locking segment (18) and an unlocking segment (19), said locking cam being configured to come into contact with the locking segment (18) for moving the blocker (15) into said at least one locking position, said locking cam being configured to come into contact with the unlocking segment (19) for moving the blocker (15) into the unlocking position.

10. Auxiliary housing (1) according to one of claims 8 and 9, comprising a return member of the blocker (20) configured to maintain contact between the blocking follower surface (17) and the blocking cam, at least for certain positions of the driver (5) and / or the blocker (15).

11. An auxiliary housing (1) according to any one of the preceding claims, wherein the main bolt (10) is movable between an unlocking position and at least two locking positions, wherein said at least one locking actuator (6) is configured to cooperate with said at least one main bolt actuating portion (11) to position the main bolt (10) in at least one of the unlocking positions when the driver (5) is in the first position, said at least one locking actuator (7) being configured to cooperate with said at least one blocker actuating portion (16) to position the blocker (15) in said at least one main bolt locking position to block the main bolt (10) in at least one of the locking positions.

12. Auxiliary housing (1) according to any one of the preceding claims, in which the main bolt (10) comprises at least one first relief (36) and the blocker (15) comprises at least one second relief (35), the first relief (36) and the second relief (35) being configured to cooperate when the main bolt (10) is in at least one locking position and the driver (5) is in the second position to maintain the position of the main bolt.

13. Auxiliary housing (1) according to the preceding claim, in which the main bolt (10) comprises at least two first reliefs (36).

14. An auxiliary housing (1) according to any preceding claim, wherein the main bolt (10) is a hook bolt.

15. Auxiliary housing (1) according to any one of the preceding claims, comprising a secondary bolt (25) movable between a second unlocking position and a second locking position, the second bolt (25) having in particular a circular, parallelepipedal, for example rectangular or square, ovoidal cross-section, and a combination thereof, preferably circular.

16. Auxiliary housing (1) according to the preceding claim, wherein the main bolt (10) comprises a secondary bolt actuator (30), said secondary bolt actuator (30) being configured to po- positioning the secondary bolt (25) in said second unlocking position when the main bolt (10) is in the unlocking position and in said second locking position when the main bolt (10) is in said at least one locking position.

17. Auxiliary box (1) according to any one of the preceding claims, in which the box (2) comprises an upper unlocking part (H) and a lower locking part (B), the driver (5) being configured to pass from the upper part (H) to the lower part (B) when the driver (5) passes from the first position to the second position, the driver (5) also being configured to pass from the lower part (B) to the upper part (H) when the driver (5) passes from the second position to the first position.

18. Auxiliary box (1) according to the preceding claim, wherein the blocker (15) and said at least one blocking actuator (7) are positioned in the upper part (H), the main bolt (10) and said at least one locking actuator (6) being positioned in the lower part (B).

19. Auxiliary housing (1) according to any one of the preceding claims, wherein the driver (5) is moved between the first position and the second position by an actuator of the lock.

20. Auxiliary housing (1) according to any one of the preceding claims, wherein the driver (5) is moved between the first position and the second position by translation.

21. Multi-point lock (50), comprising at least one auxiliary housing (1) according to any one of the preceding claims and a middle housing (51).

Images