Load-bearing belt retractor

Abstract

The present invention relates to a load-bearing seat belt retractor (10) for a seat structure (40) of a vehicle seat. The seat belt retractor (10) comprises two housing halves (20, 30) between which functional modules (11, 12, 13, 14, 15, 16, 17, 18, 19) of the seat belt retractor (10) are arranged. One functional module (11) is a belt spool (12) having a winding axis (A), the functional modules (11, 12, 13, 14, 15, 16, 17, 18, 19) are provided with a number of support plates (21) oriented perpendicular to the winding axis (A), each of the support plates having at least two locking noses (22) which engage in corresponding locking holes (23) of the two housing halves (20, 30). The housing halves (20, 30) have beads (24) and / or stiffeners oriented towards the functional modules (11, 12, 13, 14, 15, 16, 17, 18, 19), and at least one section of the functional modules (13, 15) and / or a section of the support plate (21) is supported against the beads (24) and / or stiffeners in at least one direction parallel to the winding axis (A).

Description

[Technical Field]

[0001] The present invention relates to a load-bearing seat belt retractor for a seating structure of a vehicle seat having the features of the preamble of claim 1.

[0002] Vehicle seats incorporating safety belt devices are known, for example for use as front seats in convertibles, with at least the belt retractor of the safety belt device fastened to the backrest of the vehicle seat. In this case, due to the lack of load-bearing B-pillars and for reasons of access to the rear seats or distance from the rear vehicle structure, the belt retractor is preferably integrated into the backrest of the vehicle seat, and therefore must also be designed to absorb the pulling forces acting in the event of restraint. The belt retractors themselves are identical in their basic structure to standard belt retractors, and are only equipped with various additional subassemblies, such as self-aligning inertial sensors, specifically provided for installation in the seat back.

[0003] In its basic design, the vehicle seat has a seat structure consisting of several load-bearing structural parts that serve to fasten the vehicle seat to the vehicle structure, the seat structure is equipped with springs and cushioning to improve seating comfort, and the seat structure is also used for fastening further components such as various seat adjustment mechanisms with associated electric motors, as well as further components such as heating devices, sensors, displays, and headrests.

[0004] In modern vehicles with autonomous driving systems, there is an increasing demand for greater adjustability of the vehicle seat in various orientations and positions so that the vehicle occupants can use the freedom provided by autonomous driving, for example, for more meaningful communication with other occupants, for longer and more intensive rest periods, or even for work, and can orient the vehicle seat accordingly. As a result, the safety belt device, and in particular the belt retractor, does not need to be fastened to the vehicle structure as before, but rather to the vehicle seat, as is already the case, for example, with the front seats of convertibles.

[0005] A load-bearing structural part for a vehicle seat in which a seat belt retractor is arranged is known, for example, from DE 10 2018 213 279 A1. Summary of the Invention [Problem to be solved by the invention]

[0006] Against this background, the object of the present invention is to identify an improved, dimensionally stable and crash-resistant seat belt retractor for a seat structure, which allows for simple assembly.

[0007] To this end, a load-bearing seat belt retractor is proposed having the features of claim 1. Further advantageous developments of the invention can be taken from the dependent claims, the drawings and the associated description.

[0008] According to the basic concept of the present invention, a load-bearing seat belt retractor for a seat structure of a vehicle seat is proposed according to claim 1, which comprises two housing halves between which a functional module of the seat belt retractor is arranged. One of the functional modules is a belt spool having a winding axis, and the functional module is provided with a plurality of support plates oriented perpendicular to the winding axis, each of the support plates having at least two locking noses that engage with corresponding locking holes in the two housing halves. It is proposed that the housing halves have beads and / or stiffeners oriented towards the functional module, and that the functional module and / or the support plate are supported on the beads and / or stiffeners in at least one direction parallel to the winding axis.

[0009] The beads and reinforcements of the housing halves are subjected to loads parallel to the winding axis of the belt spool by the support of the functional module and / or the support plate, and in this direction allow the transmission of greater forces than the locking nose. This reduces the load on the locking nose, which increases its load-bearing capacity in the event of additional loads. In this way, a simple and cost-effective possibility for positioning and fixing the functional module on the seat belt retractor can also be achieved, while at the same time increasing the rigidity of the housing part or the seat belt retractor.

[0010] In this context, load-bearing means that in addition to the introduction of forces from the seat belt into the seat structure, the seat belt retractor is also able to absorb and transmit the load of the seat structure itself, and is therefore suitable as a load-bearing structural component of the upper seat structure.

[0011] One functional module of a seat belt retractor is in particular a belt spool with a seat belt wound thereon to form a belt winding, and another functional module is in particular a blocking device.

[0012] The functional module may be a reversible belt tensioner, an irreversible belt tensioner, a force limiting device, a sensor device, or even a control device. Furthermore, the functional module may be an electric motor that can be provided for various functions of the seat belt retractor.

[0013] The functional modules of the seat belt retractor arranged between the two housing halves are preferably arranged coaxially with the belt spool or in series in its axial direction. This results in a space-saving structure in a narrow and elongated installation space, and therefore the seat belt retractor can be easily arranged in the backrest of a vehicle seat. With respect to the longitudinal direction of the belt spool's rotation axis, the functional modules are arranged behind or in front of the belt spool. In addition to the belt spool, other functional modules can be arranged axially consecutively, i.e., in tandem, relative to the belt spool's rotation axis, so that they probably only slightly protrude outward beyond the belt winding, continuing and further extending the elongated design of the seat belt retractor.

[0014] The support plate can support one or more functional modules of the seat belt retractor, and can be arranged between the functional modules or can be part of the functional module or part of the housing of the functional module. The support plate can also be used to stiffen the load-bearing seat belt retractor. The support plate allows for an elongated shape of the seat belt retractor, in particular with functional modules arranged in series. The support plate is preferably oriented with its surface normal parallel to the rotation axis or winding axis of the belt shaft.

[0015] The locking holes in the housing halves allow a defined positioning of the functional module during assembly and during normal operation, as well as in case of binding, and can therefore also be referred to as positioning holes. The locking holes can be, for example, stamped out of sheet metal or cut by a laser.

[0016] In a preferred embodiment, two seat bars extending parallel to each other and at a distance from each other can be inserted and fastened into the seat belt retractor along the insertion axis. The two housing halves of the seat belt retractor preferably extend across the entire width of the seat belt retractor. Each housing halve can at least partially surround two seat bars that form, on either side, the lateral seat structure of the vehicle seat back. The two housing halves preferably form two receptacles in the seat belt retractor, into which the two seat bars can be inserted. This means that the seat belt retractor can then be fitted onto the seat bars of the seat back in a simple manner during the assembly process. In an advantageous embodiment, the housing halves are provided with through-holes that further enable simple fixing of the seat bars by means of screw connections. The receptacle formed for the seat bar allows force and / or torque transmission in a direction different from the insertion direction, thereby transmitting forces between the seat bar and the housing halves of the seat belt retractor via a large contact surface. This reduces stress peaks and loads on the screw connection. As a result, a strong, stable and at the same time simple connection can be achieved overall.

[0017] In an advantageous embodiment, the beads and / or stiffeners are formed by channel-shaped stiffeners on which the functional modules or sections of the support plate are supported on one or both sides parallel to the winding axis. The channel-shaped stiffeners can be introduced into the metal sheet in a cost-effective manner, for example by a forming process and / or stamping.

[0018] According to a further development, it is proposed that at least one housing part has a closing bead which is stamped towards the functional module and has a cutout, and a section of the functional module is supported in the cutout of the bead.

[0019] The shape of the closed bead allows for high rigidity, for example when the notch is located in the center of the bead, so that the bead divided into two parts by the notch remains stable. The notch allows for accurate positioning of the section of the functional module supported therein. In addition, the notch allows for support to be achieved in two opposite directions, in particular along the rotation axis of the belt shaft or along the winding axis of the belt spool. The combination of notches in the closed bead is also advantageous in terms of the assembly procedure, since the assembly of the housing halves or functional modules is thereby simplified thanks to a type of pre-alignment of the functional modules or support plates in the bead relative to the notches.

[0020] According to a further development, it is proposed that at least one locking hole of the housing part has a locking tongue. The locking tongue allows the locking nose inserted into the locking hole to be secured by deformation of the locking tongue due to spring load. The locking tongue preferably protrudes into the locking hole to such an extent that the wall thickness of the locking nose of the support plate causes deformation of the locking tongue when the locking nose engages with the locking hole. This allows for easy locking during installation, which simplifies the installation of the functional module itself and reduces the influence of manufacturing tolerances.

[0021] It is further proposed that the fixed tongue is oriented parallel to the winding axis, with the tongue end of the fixed tongue directed away from the belt spool functional module.

[0022] It is further proposed that the two housing halves have a plurality of locking holes, each with a fixing tongue, and that the tongue ends of all the fixing tongues in the locking holes of the two housing halves are oriented in the same direction, preferably away from the belt spool functional module.

[0023] Thus, a fixed locking nose or support plate can be attached to the functional module as a base. Multiple locking holes can be provided for different functional modules and / or support plates. Thus, in one possible embodiment, the locking tongue is oriented parallel to the winding axis, with the tongue end pointing toward the motor or electric motor functional module as a base. The electric motor as a functional module can be advantageously attached to the end in an axial or coaxial arrangement, and the electric motor can be positioned at the other end opposite the belt spool of the seat belt retractor. In addition to the multiple locking holes with locking tongues, other locking holes without locking tongues can be provided in the two housing halves.

[0024] In an advantageous embodiment, the locking tongue has a constant width, so that a large locking effect can be achieved. The width of the tongue is preferably narrower than the width of the locking nose. Furthermore, the attachment force and the achievable locking effect can be adjusted, inter alia, by the width of the locking nose and the oversizing of the tongue.

[0025] According to a further development, it is proposed that the functional module has a tab extending parallel to the winding axis, and that the housing halves each have at least one open bead into which the tab of the functional module is inserted.

[0026] This allows the functional module to be fixed in position in several axes and at the same time simply mounted by inserting it into the two housing halves, which also makes it easy to mount, for example, other functional modules between the two housing halves. In a possible embodiment, the tabs of the functional module can be inserted into corresponding open beads of the two housing parts, oriented parallel to the winding axis of the belt spool.

[0027] A motor module or electric motor as a functional module with tabs is particularly well suited, since the motor module is generally arranged at the end of the coaxial alignment of the functional module, which facilitates assembly. Generally, the functional module provided at the other end of the coaxial arrangement is a belt spool, which, by virtue of its function, is less suitable for the arrangement of correspondingly oriented tabs due to the provided belt winding.

[0028] In one possible embodiment, at least one housing part can have a tab extending parallel to the winding axis, which tab is inserted into a corresponding open bead of a functional module, which is preferably a motor module or an electric motor.

[0029] In another advantageous embodiment, the fixing tongue has a width that tapers towards the end of the tongue, so that the initial resistance during assembly can be reduced.

[0030] According to a further development, it is proposed that sections of the functional module are supported parallel to the winding axis on both sides of at least one closing bead of the housing part, said at least one closing bead being stamped away from the functional module, which also allows for a simplified assembly of the housing halves with the functional module thanks to the type of pre-alignment of the functional module of interest and / or the optional corresponding support plate.

[0031] This is particularly advantageous when the functional module comprises a pyrotechnic tensioner wheel, so that the load that occurs when the pyrotechnic tensioner is triggered can be absorbed through the surface by the housing part.

[0032] In an advantageous embodiment, at least one bead and / or stiffener is formed by a rib oriented perpendicular to the winding axis. This allows for simple support of the functional module and / or the support plate independent of the locking nose. In particular, if the bead and / or stiffener is stamped away from the functional module, the functional module can be supported on both sides parallel to the winding axis.

[0033] In one advantageous embodiment, the seat belt retractor comprises a functional module in which a C-shaped clip is arranged, with two legs of the C-shaped clip seated respectively inside the two housing halves, and a seat bar that can be inserted into the clip and fastened to the clip and the two housing halves.

[0034] Each leg of the clip therefore preferably forms a contact surface for contacting the housing part. Furthermore, the clip preferably forms a receptacle above, and in particular below, the belt spool functional module into which the seat bar can be inserted. The two housing halves of the seat belt retractor preferably surround the C-shaped clip from several sides. In this way, the functional module, in particular the belt spool functional module, can directly introduce forces into the inserted and fastened seat bar. In particular in the case of restraints, this allows for direct force transmission between the blocked belt spool and further seat structures connected to the vehicle.

[0035] In an advantageous embodiment, the clip is provided with through-holes which correspond to the through-holes in the housing halves and which further allow for simple fixing of the seat bar by means of a screw connection.

[0036] According to a further development, it is proposed that one housing part is designed with an L-shaped profile, which can be fastened to two parallel spaced apart seat bars.

[0037] Preferably, the L-shaped profile, which extends parallel to the winding axis of the belt spool, has a favorable effect on the stiffness of the seat belt retractor and can be manufactured from sheet metal in a simple manner. The bend between the two legs of the L-shaped profile, which are preferably essentially at right angles to each other, can also be achieved, for example, by two bending lines.

[0038] The L-shaped profile of one housing part makes it possible, in particular, to insert a functional module having two tabs into the open beads on each leg of the L-shaped profile, thereby further improving fastening of the functional module within the housing.

[0039] It is further proposed that one housing part is designed as a cover-shaped contour and has an overall height of less than 15 mm.

[0040] The housing portion having the cover-shaped profile is essentially flat and extends across the entire width of the seat belt retractor. Together with the housing portion having the L-shaped profile, a U-shaped profile is preferably formed in which the functional module is arranged. The U-shaped profile is open in the direction in which the seat bar is intended to be received. That is, in typical cases where the seat belt retractor is installed at the top end of the backrest of a vehicle seat, the housing of the seat belt retractor is open at the bottom.

[0041] The housing part with the L-shaped profile and the housing part with the cover-shaped profile can be manufactured from sheet metal, for example by punching and forming.

[0042] According to a further development, it is proposed that the two housing halves are directly connected with the tongues and corresponding slots by means of an insertion connection.

[0043] Thereby, force transmission between the two housing halves in multiple axes over a relatively long contact area, in particular along the width of the seat belt retractor, can be achieved in a simple manner. The tongues and slots can be cost-effectively manufactured using conventional sheet metal processing methods.

[0044] In one possible advantageous embodiment, the tongue is oriented parallel to the insertion axis of the seat bar, which allows a good form-locking connection of the two housing halves in all directions different from the insertion axis.

[0045] Furthermore, a seating structure for a vehicle seat is proposed, which comprises two seat bars extending parallel to each other at a distance on the back of the vehicle seat, the seat bars being inserted into the proposed load-bearing seat belt retractor and fastened to the seat belt retractor.

[0046] The seat belt retractor is therefore load bearing as a structural cross strut between the vertical seat bars of the seat back.

[0047] According to a further development, it is proposed that the two seat bars are fastened to the seat belt retractor by means of one screw each, which is fed through through-holes in the seat bars and in the two housing halves.

[0048] In this way, a simple, stable and cost-effective fastening of the seat belt retractor to the seat bar can be achieved.Furthermore, it is proposed that a C-shaped clip of the functional module is arranged between the housing halves and the at least one seat bar, the C-shaped clip having corresponding through-holes for screw fastening the two housing halves and the seat bar together. [Brief explanation of the drawings]

[0049] The present invention will be described below using preferred embodiments with reference to the accompanying drawings, in which: [Figure 1]FIG. 1 is an exploded view of a load-bearing seat belt retractor. [Figure 2] FIG. 2 is an exploded view from the rear of the load-bearing seat belt retractor. [Figure 3] FIG. 3 is an exploded view of a load-bearing seat belt retractor with a seat bar. [Figure 4] FIG. 4 is an exploded top view of the load-bearing seat belt retractor. [Figure 5] FIG. 5 shows a locking hole with a fixing tang and a locking nose inserted therein. [Figure 6] FIG. 6 shows a locking hole with another fixing tang and a locking nose inserted. [Figure 7] FIG. 7 is a side view of a locking hole with a fixing tang and a locking nose inserted.

[0050] FIG. 1 shows an exploded view of an exemplary embodiment of a load-bearing seat belt retractor 10. The seat belt retractor 10 has multiple functional modules 11, 12, 13, 14, 15, 16, 17, 18, and 19 constructed in tandem in a stacked arrangement. This results in an elongated design that allows the seat belt retractor to be placed on top of the backrest of a vehicle seat. The functional modules 11, 12, 13, 14, 15, 16, 17, 18, and 19 are, for example, a belt spool 12 for a seat belt (not shown) provided with a drive spring 11. The belt spool 12 has a winding axis A around which the seat belt can be wound to form a belt winding. Furthermore, a tensioner drive wheel 13 is provided, capable of achieving pyrotechnic belt tensioning. A force-limiting apparatus 14 (LLA) is arranged next to an associated switching device 15. The profile head 16 with the blocking claws is provided axially adjacent to a frame 17 with teeth for blocking the blocking claws. Furthermore, for example, a transmission 18, in particular a planetary transmission 18, is provided axially, on top of which a motor 19, in particular an electric motor, can be provided.

[0051] Some of the functional modules have a support plate 21, which is integral with or mounted between two functional modules, and which supports the functional modules within a housing essentially formed from two housing halves 20, 30. The two housing halves 20, 30 are each arranged transversely to the winding axis A and surround a functional module 11, 12, 13, 14, 15, 16, 17, 18, 19, so that the functional module is held and supported within the two housing halves 20, 30. The housing halves 20, 30 at least partially complement each other to form a completely closed profile, which makes it possible to support the functional modules over their entire periphery.

[0052] The support plate 21 has a number of locking noses 22 which, in the assembled state, engage with locking holes 23 provided in the two housing halves 20, 30 to axially fix the support plate 21 in question along the winding axis A. The support plate 21 can be supported by its peripheral edge on the housing inside of the housing parts 20, 30 in a direction perpendicular to the winding axis A.

[0053] In addition to the locking holes 23 for fastening the functional modules 11, 12, 13, 14, 15, 16, 17, 18, 19, the two housing halves 20, 30 have beads 24 molded inward, i.e., toward the functional elements, forming channel-like reinforcements when viewed from the outside. See also FIG. 2. The inwardly molded beads 24 may have notches 25 in which sections or parts of the functional modules 13, 15 are supported in two directions parallel to the winding axis A. These beads 24 are oriented, for example, in the manner of channels parallel to the winding axis A. Furthermore, these beads 24 are closed beads 24, without openings or punched-out portions at their axial ends. At the same time, the beads 24 serve as reinforcements for each of the housing halves 20, 30.

[0054] Furthermore, one of the housing halves 20 is provided with a closing bead 28 oriented perpendicular to the winding axis A. The bead 28 is formed outward, i.e., towards or away from the functional module. The functional module 13 can be supported on the bead 28 in both directions along the winding axis A as well as perpendicular to the winding axis A.

[0055] The motor functional module 19 is provided with three tabs 27 oriented parallel to the winding axis A and pointing towards the belt spool 12. These tabs 27 are inserted into three corresponding open beads 26 provided on the two housing halves 20, 30.

[0056] The belt spool 12 is provided with a C-shaped clip 33 attached to the frame of the belt spool 12 and / or to the support plate 21 of the belt spool 12. The clip 33 has two legs 34, which are seated against the housing inner surfaces of the housing halves 20, 30, respectively. In a possible exemplary embodiment, the functional module 19 on the other side of the seat belt retractor 10 can likewise have a corresponding C-shaped clip 33.

[0057] The housing halves 20, 30 can be connected by form-locking engagement through an insertion connection of tongues 35 and corresponding slots 36 on the housing halves 20, 30. As can be seen in the illustration in the figures, this form-locking engagement preferably occurs at the top of the seat belt retractor 10.

[0058] One housing half 30 is L-shaped or has an L-shaped profile and, in this exemplary embodiment, has an opening for the seat belt (not shown) in the area of ​​the belt spool 12. The other housing half 20 is designed as a cover or as a cover-shaped profile and is therefore essentially flatter than the housing half 30 which has two legs of an L-shaped profile.

[0059] 3 shows a load-bearing seat belt retractor 10, part of a seat structure 40 in the form of two seat bars 41 of the backrest of a vehicle seat. The seat belt retractor 10 can be fitted onto the seat bar 41 from above and perpendicular to the winding axis A using corresponding through-holes and screwed to said seat bar, so that the seat belt retractor 10 forms a load-bearing element of the seat structure 40. A C-shaped clip 33 or clips 33 are arranged between the two housing halves 20, 30 and the seat bar 41 and are screwed together therewith.

[0060] 5 and 6 show top views of the locking holes 23 of the housing halves 20, 30, into which the locking noses 22 are inserted. In two exemplary embodiments, locking tongues 31 are provided, which press against the locking noses 22, thus pressing them against the opposite edges of the locking holes 23. The locking noses 22 on the support plate are thus fixed in the direction of being pulled out of the locking holes 23, which simplifies assembly and prevents rattle noises. In particular, the locking tongues 31 in the locking holes 23 allow tolerance compensation during the installation of the axially stacked functional modules 11, 12, 13, 14, 15, 16, 17, 18, 19. In an advantageous exemplary embodiment, all locking holes 23 point in the direction toward the functional modules 19 at the other opposite end of the belt spool 12, thereby allowing tolerance compensation with respect to the base.

[0061] The locking tongue 31 of the exemplary embodiment of Figure 5 tapers toward the point of contact with the locking nose 22, such that the locking tongue 31 is significantly narrower at the tongue end 32 than at the base of the locking tongue 31. Figure 6 shows the locking tongue 31 having a constant width.

[0062] FIG. 7 shows a cross-sectional view of the exemplary embodiment of FIGS. 5 and 6, in which deflection and deformation of the fixing tongue 31 achieves pressing of the tongue end 32 of the fixing tongue 31 against the locking nose 22.

[0063] In particular, the fixing tongues 31 are uniformly oriented in such a way that they push all functional modules 11, 12, 13, 14, 15, 16, 17, 18, 19 in the same direction to form a compact design, which in this exemplary embodiment is the direction towards the electric motor 19 fixed to the end of the seat belt retractor.

[0064] The switching device 15 for the force-limiting device 14 is here constructed from a relatively wide plastic plate having a width of about 2 cm, which width therefore allows for particularly good orientation at an angle between the two housing halves 20, 30. In addition, after positioning, the switching device 15 can be attached in the oriented position by means of screws. The screwing is preferably performed from the outside.

Claims

1. A load-bearing belt retractor (10) for a seating structure (40) of a vehicle seat, comprising: - the load-bearing belt retractor (10) has two housing halves (20, 30) between which functional modules (11, 12, 13, 14, 15, 16, 17, 18, 19) of the load-bearing belt retractor (10) are arranged, one functional module (11) is a belt spool (12) with a winding axis (A), - said functional module (11, 12, 13, 14, 15, 16, 17, 18, 19) is provided with a plurality of support plates (21) oriented perpendicular to said winding axis (A), each of said support plates having at least two locking noses (22) engaging in corresponding locking holes (23) of said two housing halves (20, 30); - a load-bearing belt retractor (10), characterized in that the housing halves (20, 30) have beads (24) and / or stiffeners oriented towards the functional modules (11, 12, 13, 14, 15, 16, 17, 18, 19), and at least one section of the functional modules (13, 15) and / or one section of the support plate (21) is supported on the beads (24) and / or stiffeners in at least one direction parallel to the winding axis (A).

2. 2. A load-bearing belt retractor (10) according to claim 1, characterized in that the beads (24) and / or reinforcements are formed by channel-shaped reinforcements on which functional modules (13, 15) or sections of the support plate (21) are supported on one or both sides parallel to the winding axis (A).

3. 3. A load-bearing belt retractor (10) according to claim 1 or 2, characterized in that at least one housing part (20, 30) is stamped towards the functional module (13, 15) and has a closing bead (24) with a cutout (25), a section of the functional module (13, 15) being supported in the cutout (25) of the bead (24).

4. A load-bearing belt retractor (10) according to any one of claims 1 to 3, characterized in that at least one locking hole (23) has a fixing tongue (31).

5. 5. The load-bearing belt retractor (10) according to claim 4, characterized in that the fixed tongue (31) is oriented parallel to the winding axis (A) and the tongue end (32) of the fixed tongue (31) is directed in a direction away from the functional module (12).

6. 6. A load-bearing belt retractor (10) according to claim 4 or 5, characterized in that the two housing halves (20, 30) have a plurality of locking holes (23) each having a locking tongue (31), and the tongue ends (32) of all the locking tongues (31) in the locking holes (23) of the two housing halves (20, 30) are oriented in the same direction.

7. A load-bearing belt retractor (10) according to any one of claims 4 to 6, characterized in that the fixing tongue (31) has a constant width.

8. A load-bearing belt retractor (10) according to any one of claims 4 to 6, characterized in that the fixing tongue (31) has a width that tapers towards the tongue end (32).

9. 9. The load-bearing belt retractor (10) according to any one of claims 1 to 8, characterized in that the functional module (19) has a tab (27) extending parallel to the winding axis (A), and the housing halves (20, 30) each have at least one open bead (26) into which the tab (27) of the functional module (19) is inserted.

10. 10. A load-bearing belt retractor (10) according to any one of claims 1 to 9, characterized in that the sections of the functional module (13) are supported on both sides of at least one closing bead (28) of the housing part (20, 30), the at least one closing bead being stamped in a direction away from the functional module (13).

11. 11. The load-bearing belt retractor (10) according to any one of claims 1 to 10, characterized in that at least one bead (28) and / or reinforcement is formed by a rib oriented perpendicular to the winding axis (A).

12. 12. The load-bearing belt retractor (10) according to claim 1, characterized in that the load-bearing belt retractor (10) comprises a functional module (12) on which a C-shaped clip (33) is arranged, the two legs (34) of the C-shaped clip (33) being seated against the insides of the two housing halves (20, 30), respectively, and a seat bar (41) can be inserted into the clip (33) and fastened to the clip (33) and the two housing halves (20, 30).

13. Load-bearing belt retractor (10) according to any one of claims 1 to 12, characterized in that one housing part (30) is designed with an L-shaped profile.

14. A load-bearing belt retractor (10) according to any one of claims 1 to 13, characterized in that one housing part (20) is designed as a cover-shaped profile and has an overall height of less than 15 mm.

15. A load-bearing belt retractor (10) according to any one of claims 1 to 14, characterized in that the two housing halves (20, 30) are directly connected with tongues (35) and corresponding slots (36) by an insertion connection.

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