Seatbelt retractor with an electrically operated locking device

Abstract

Seatbelt retractor with -a rotatably mounted belt shaft (20) and and -an electrically actuated locking device (100) which, when actuated, indirectly or directly causes the belt shaft (20) to be blocked in the extension direction, and -an electrical line (11) for contacting the blocking device with an external power supply and / or control device, wherein -a system cap (300) and a bearing cap (200) are provided, and -the bearing cap (200) has a holder (201) for the electrical locking device (100), and -the system cap (300) covers the bearing cap (200) and the electrical locking device (100) held thereon in the mounted position towards the outside, characterized in that -the system cap (300) and the bearing cap (200) each have a partial receptacle (301,204) which, in the assembled position of the system cap (300) and the bearing cap (200), combine to form a receptacle (400) for a plug contact housing (500).

Description

[0001] The present invention relates to a belt retractor with an electrically actuated blocking device having the features of the preamble of claim 1.

[0002] A generic electrically operated blocking device is known, for example, from GB 2 398 824 A and from DE 10 2019 213 915 A1.

[0003] Such blocking devices serve to stop an externally toothed control disc, which is rotatably mounted on a belt shaft of the belt retractor, by engagement of a blocking lever relative to the belt shaft and thereby force a blocking pawl to move into a toothing fixed to the vehicle, which in turn blocks the belt shaft in the extension direction.

[0004] In conventional mechanical locking devices, an inertial mass is mounted on a contact surface. This mass is deflected when a predetermined vehicle deceleration is exceeded, thereby deflecting the locking lever and forcing it to engage the toothing of the control disc. Such mechanical locking devices are also referred to as vehicle-sensitive sensor devices. One problem with these mechanical locking devices is that the inertial mass must always be aligned in a defined orientation on the contact surface relative to the vehicle's longitudinal and transverse axes, regardless of the installation geometry of the belt retractor, to prevent the belt shaft from being inadvertently blocked.This means that the belt retractor must be designed for each individual vehicle. The alignment of the contact surface and the mass resting on it in relation to the belt retractor must be individually designed so that it corresponds to the specified alignment, taking into account the installation geometry of the belt retractor in the vehicle. Furthermore, with belt retractors integrated in the front seats, such as in convertibles, there is the problem that the inertial mass is inadvertently deflected on the contact surface when the angle of the backrest is adjusted or when the backrest is folded forward to allow access to the rear seats. This causes the blocking lever to inadvertently move into the external toothing of the control disc. This blocks the belt retractor in the extension direction and the backrest cannot be swivelled any further, or the occupant cannot fasten their seat belt. To avoid this, additional switch-off mechanisms orCompensating mechanisms must be provided, but these must only be effective in these cases, so that the occupant is restrained in the event of an accident. These challenges make such a mechanical locking device very complex.

[0005] In the case of an electrically actuated blocking device, as known from GB 2 398 824 A or DE 10 2019 213 915 A1, the movement of the blocking lever is electrically controlled, which eliminates the previously required inertial mass. The belt retractor can therefore be mounted in various positions in the vehicle and also in backrests. Furthermore, the blocking of the belt shaft can be controlled by an electrical signal from a control device. The signal can be generated by a control device, which can also generate the signal as a function of other sensor devices or control systems. For example, it is conceivable to block the belt shaft automatically when a driving dynamics assistance system is activated, which is controlled, for example, as a function of a signal from an optical sensor device.This also controls the electrical locking device directly or indirectly depending on the signal from the optical sensor device. Furthermore, the electrically actuated locking device can be operated in any orientation and configuration, as it is not actuated by inertial forces and therefore does not need to be aligned in a specific direction relative to the vehicle's direction of travel. It can therefore also be preferably installed in seats of at least partially autonomous vehicles, which the occupant can adjust over considerably larger adjustment ranges for improved communication with other occupants, for alignment in a rest position, or generally to utilize the freedom gained through autonomous driving, compared to seats in conventional, non-autonomous vehicles.

[0006] From the document US 4 895 217 A, a belt retractor with an electrically actuated blocking device is also known, in which an electromagnet is provided which, when energised, forces a blocking lever to perform a control movement during which it engages with a toothing of a control disc and thereby actuates the blocking device.

[0007] From the publication DE 10 2010 015 785 A1, a belt retractor with an electric motor is known, in which the electric motor is provided with plug contacts which are connected to the electric motor via flexible sections, so that the electric motor can carry out slight movements relative to a circuit board without the plug contacts being subjected to stress.

[0008] One problem with a belt retractor with such an electrically actuated locking device is that the belt retractor requires one or more electrical wires to control the locking device, which must be connected to an external control device or power supply. This is particularly problematic because the electrical connection can only be established when the belt retractor is installed in the vehicle, where vehicle manufacturers place particular emphasis on ensuring the contact is as easy to handle and error-free as possible.

[0009] The object of the invention is to provide a belt retractor with an electrically actuated blocking device, which should have an easy-to-use electrical contact.

[0010] To achieve this object, a belt retractor having the features of claim 1 is proposed. Further preferred embodiments of the invention can be found in the subclaims, the figures, and the associated description.

[0011] According to the basic idea of ​​the invention, it is proposed that the system cap and the bearing cap each have a partial receptacle which, in the mounted positions of the system cap and the bearing cap, complement each other to form a receptacle for a plug contact housing.

[0012] The advantage of the proposed solution is that the created receptacle forms a simple guide for inserting a plug contact housing during assembly. Alternatively, a plug contact housing can already be held in the belt retractor's receptacle, which is electrically connected to the electrical cables and can be easily contacted with a mating contact during assembly. The receptacle is formed by a partial receptacle on the bearing cap and one on the system cap, so that the receptacle is automatically formed when the belt retractor is assembled and the system cap is arranged on the bearing cap. A particular advantage is that two parts that are already provided here, the bearing cap and the system cap, are used, so that the receptacle is structurally very simple and can be implemented with minimal additional effort and minimal additional costs.Furthermore, the receptacle is deliberately formed by a partial receptacle on the bearing cap, on which the holder for the blocking device is also arranged, so that the receptacle is arranged in a direct spatial relationship to the blocking device held in the holder with its electrical lines to be contacted.

[0013] It is further proposed that the plug contact housing be positively fixed in the receptacle in and / or against a plugging direction predetermined by the plug contact housing. Such positive fixing of the plug contact housing can be formed, for example, by projections, grooves, or lugs, which secure the plug contact housing against displacement in a predetermined direction. The proposed solution allows the plug contact housing to be supported in or on the receptacle during a plugging process and / or during a removal process of a mating contact, thus facilitating the plugging and / or removal process by preventing the plug contact housing from shifting during the plugging process or being pulled along during removal.Furthermore, this prevents the connection between the electrical wires and the plug contact housing from being stressed during the plugging and / or unplugging process, provided that the contact is made via a plug contact housing that is already secured in the receptacle and connected to the electrical wires. Furthermore, the plug contact housing is fixed in a predetermined orientation. This simplifies the plugging process itself, and the operator can more easily locate the plug contact housing with the wires provided therein and connect it to the mating contact.

[0014] It is further proposed that the plug contact housing be positively fixed in the receptacle with respect to a rotational movement about a rotation axis aligned parallel to the longitudinal axes of the electrical lines. The proposed further development secures the plug contact housing against rotation relative to the longitudinal axes of the electrical lines.

[0015] The contacting can be implemented in a particularly simple manner in that the receptacle has a non-circular, preferably rectangular, particularly preferably square shape in a plane oriented perpendicular to a predetermined plug-in direction of the plug contact housing. The non-circular, rectangular or even square shape of the receptacle determines the angular orientation of the plug contact housing to be inserted into the receptacle, which is adapted to the orientation of the electrical contacts to be contacted. If a plug contact housing is already held in the receptacle, the orientation of the plug contact housing is determined by the shape of the receptacle. Furthermore, the shape of the receptacle provides support for the plug contact housing, so that it is fixed in the predetermined orientation even when external forces act on it.

[0016] It is further proposed that the receptacle have a shape coding defining the arrangement and / or orientation of the plug contact housing. The shape coding of the receptacle defines the predetermined arrangement and orientation of the plug contact housing in the receptacle. The plug contact housing can thus be arranged and held in the receptacle in exclusively a predetermined arrangement or orientation. This predetermined orientation of the plug contact housing can, for example, be designed for a particularly favorable and, as far as possible, stress-relieved arrangement and supply of the electrical lines in the electrical blocking device to the plug contact housing.In addition, the shape coding not only immediately communicates to the installer the correct position for the plug contact housing, but also prevents the plug contact housing from being installed in an incorrect orientation, as this is impossible due to the shape coding. Shape coding can be implemented, for example, by a protruding lug, groove, or step on one side.

[0017] It is further proposed that the plug contact housing protrude from the receptacle and rests on an outer edge of the receptacle with a first shoulder. By supporting the plug contact housing, the mating forces during contacting are transmitted via the plug contact housing into the receptacle, so that the electrical lines in the plug contact housing are not subjected to any stress, apart from unavoidable frictional forces.

[0018] It is further proposed that the plug contact housing be supported on at least one of the two mutually facing edges of the partial receptacles via a second shoulder. The second shoulder limits the insertion depth of the plug contact housing into the respective partial receptacle. Furthermore, this allows the plug contact housing to be clamped more effectively in the receptacle between the partial receptacles.

[0019] It is further proposed that the two partial receptacles be connected to each other by a snap-in connection. This snap-in connection is advantageous in that it can be manufactured without any tools and very cost-effectively, by molding the locking edges and locking arms integrally onto the partial receptacles, for example, through a plastic injection molding process.

[0020] It is further proposed that a control disc rotatably mounted on the belt shaft or on the bearing cap is provided, and the electrically actuated blocking device has a housing with a base plate and an upright first leg, and a blocking lever with a steel plate pivotally mounted in a pivot bearing of the upright first leg, and the electrically actuated blocking device stops the control disc relative to the belt shaft by an engagement of the blocking lever in the toothing of the control disc and thereby forces a blocking pawl to move in which it engages in a toothing of the belt retractor that is fixed to the vehicle and blocks the belt shaft in the extension direction.The triggering of the blocking of the belt shaft by stopping the control disc and the resulting forced movement of the blocking pawl has long proven itself in practice, whereby the control disc only serves to control the movement of the blocking pawl and the entire forces for restraining the occupant are absorbed by the blocking pawl engaging in the toothing fixed to the vehicle.

[0021] It is further proposed that the blocking lever have a lever arm projecting outward from the first leg, which is acted upon by a first spring, preloading the blocking lever into a position in which it engages the toothing of the control disc with a blocking tip arranged at the end of a blocking arm. The proposed solution configures the blocking device such that, in an initial state, it blocks the control disc and the belt shaft of the belt retractor.

[0022] It is further proposed that the blocking device comprise an electromagnet arranged in the housing which, when energized, exerts a force on the blocking lever, pulling the blocking tip out of the toothing of the control disc. The electrical blocking device is thus designed such that, when energized, it releases the blocking of the belt shaft by pulling the blocking lever out of the toothing of the control disc, and automatically blocks it when the power supply is interrupted. This is advantageous, for example, in the event of a power failure, such as in a serious accident, since the occupant is thus restrained by the seat belt even in this case.

[0023] It is further proposed that the plug contact housing be dimensionally stable and have a non-circular outer shape that corresponds to the shape of the receptacle. If the plug contact housing is first inserted during assembly in the vehicle, the proposed solution offers the advantage of an improved, anti-twist insertion movement of the plug contact housing into the receptacle. If the plug contact housing is already arranged in the receptacle of the belt retractor and contact with the belt retractor is made via the plug contact housing, the proposed solution offers the advantage that the plug contact housing is thereby fixed in the receptacle in a predetermined orientation and can be supported in this position in the receptacle.

[0024] The invention will be explained below using a preferred embodiment with reference to the attached figures. Fig. 1 to 4 show an electrical blocking device according to the prior art and a belt retractor with such a blocking device; Fig. 5 to 11 show a further developed blocking device with a bearing cap and a system cap of a belt retractor according to the invention in various representations.

[0025] An electrically actuated blocking device 100 used by the applicant in its products, which corresponds to the embodiment of GB 2 398 824 A, is described in the Fig. 1 and Fig. 2. The electrically actuated blocking device 100 comprises as basic elements a housing 1 with an L-shaped basic structure with a base plate 15 and a first upright leg 16, a blocking lever 2 pivotally mounted on the first upright leg 16 of the housing 1, an electromagnet 3 and a first spring 4, which is held at one end on the housing 1 and is connected at the other end to a lever arm 22 of the blocking lever 2 projecting outward from the first upright leg 16. The first spring 4 is designed as a tension spring such that it preloads the blocking lever 2 into a position in which it engages with a blocking tip 25 in a toothing 26 of a control disk 21 and thereby holds the control disk 21 relative to the belt shaft 20. The control disk 21 with the toothing 26 is only in the Fig. 3 in a belt retractor according to the prior art. As a result, when the belt shaft 20 rotates in the extension direction, the blocking pawl is automatically forced to engage a toothing fixed to the vehicle, and the belt shaft 20 is subsequently blocked against further belt webbing extension. The blocking lever 2 comprises a contoured part 24 and a steel plate 5, wherein the steel plate 5 faces the electromagnet 3, so that when the electromagnet 3 is energized, the blocking lever 2 is attracted by it and thus pulled out of the toothing 26 of the control disk 21. The belt shaft 20 can therefore subsequently rotate freely in the extension and retraction directions. The advantage of this solution is that the belt shaft 20 is blocked in the extension direction even in the event of a power failure or a defect in the electromagnet 3, and the occupant is safely restrained in this case too.

[0026] The electromagnet 3 comprises a base component 6 with a columnar central section 7 and two radial flanges 8, one of which projects radially outward at each end of the central section 7. The electromagnet 3 is held by the base component 6 on the base plate 15 of the housing 1. The base component 6 has a tubular passage section 14 in the central section 7 and an annular intermediate space 9 radially outward on the central section 7, wherein the annular intermediate space 9 is delimited towards the ends of the central section 7 by the radial flanges 8. The electromagnet 3 further comprises a coil 10 with a plurality of turns, which is arranged in the annular intermediate space 9 and is electrically contacted with an external control device via lines 11 provided in the base component 6.In addition, the electromagnet 3 comprises a first iron core 12 which is arranged in the tubular passage section 14 of the base component 6 and has a free end facing the steel plate 5 of the blocking lever 2.

[0027] When the coil 10 is energized, the blocking lever 2 is attracted by closing a first magnetic circuit I, defined by the first upstanding leg 16 of the housing 1, the first iron core 12 and the sections of the blocking lever 2 and the base plate 15 between the first iron core 12 and the first upstanding leg 16, as shown in the right-hand illustration of the Fig. 2 can be seen. Furthermore, a damping element 13 in the form of a soft tube, e.g. in the form of a short piece of hose, is provided, which is clamped at its ends between two extensions of the radial flange 8 facing the blocking lever 2. The damping element 13 is positioned so that the blocking lever 2 does not rest with its free end on the damping element 13 in the deflected position (left illustration of the Fig. 2) and only in the tightened position does it come into contact with the central soft section of the damping element 13 between the clamping points (right illustration of the Fig. 2). This dampens the tightening movement of the locking lever 2 in the final phase of the movement. This dampening creates a soft stop and prevents annoying "rattling noises" during the tightening movement and possible subsequent slight movements of the locking lever 2.

[0028] The blocking device 100 is mounted in a holder 201 of a bearing cap 200, on which the control disc 21 and / or the belt shaft 20 can be mounted. The bearing cap 200 itself is held on a frame 17 of the belt retractor, as shown in the Fig. 4. Furthermore, the bearing cap 200 can have a contour 202 on its outer side in the form of a toothing or bearing structure for a gear transmission for an ELR / ALR switching device. Furthermore, the bearing cap 200 has a recess 203 through which the control disc 21 arranged in the bearing cap 200 is exposed to the outside, so that the blocking lever 2 can engage the toothing 26 of the control disc 21 from the outside with its blocking tip 25.

[0029] The bearing cap 200 is secured to the outside by a Fig. 4, which in turn is attached directly to the frame 17 or indirectly to the frame 17 via the bearing cap 200. The system cap 300 thus covers the bearing cap 200 and the blocking device 100 held thereon towards the outside and forms a protection for the blocking device 100 and the other parts on the bearing cap 200 against external mechanical influences.

[0030] The electrically actuated blocking device 100 is shown here using an exemplary embodiment in which the blocking lever 2 is spring-loaded in the engaged position. However, the electrically actuated blocking device 100 can also be designed such that the blocking lever is spring-loaded opposite to the engagement direction and is only driven to engage the toothing 26 when the electromagnet 10 is energized and the resulting magnetic force is applied. Furthermore, an electrically actuated blocking device 100 can also be used, which triggers the blocking of the belt shaft 20 upon energization or power interruption by a differently designed mechanical blocking device. The only important aspect of the invention is that the electrically actuated blocking device has an electrical line 11, which must be contacted during assembly of the belt retractor or during assembly of the belt retractor in the vehicle.

[0031] In the Fig. 5 to 7, a new bearing cap 200, a new system cap 300 and a further developed electrical blocking device 100 of a further developed belt retractor are shown. The belt retractor according to the invention is formed by the bearing cap 200, the system cap 300 and the electrical blocking device 100 in the belt retractor, which is shown in the Fig. 3 and Fig. 4, against a bearing cap 200, a system cap 300 and an electrical blocking device 100 as shown in the Fig. 5 to 7 are replaced. Otherwise, the components, in particular the frame 17 with its fastening points, of the belt retractor can remain unchanged.

[0032] The electrical blocking device 100, the bearing cap 200 and the system cap 300 of the Fig. 5 to 7 correspond in their basic structure to that in the Fig. 1 to 4, the bearing cap 200 and the system cap 300, wherein the bearing cap 200, the system cap 300 and the blocking device 100 of the Fig. 5 to 7. The bearing cap 200 has a holder 201 in which the electrical blocking device 100 is held. The holder 201 is extended toward its radial outer side to form a partial receptacle 204. The system cap 300 also has a radially outwardly extending partial receptacle 301. Furthermore, a plug contact housing 500 is provided, which is placed onto the free electrical lines 11 of the blocking device 100 and connected to them, for example, by a crimping process.

[0033] In the assembled position, the system cap 300 and the bearing cap 200 together form a receptacle 400 in the space between the partial receptacle 301 of the system cap 300 and the partial receptacle 204 of the bearing cap 200, in which the plug contact housing 500 is held. For assembly, the plug contact housing 500 is placed onto the electrical lines 11 of the electrical blocking device 100. The blocking device 100 is then inserted into the holder 201 of the bearing cap 200, and the plug contact housing 500, held thereto via the electrical lines 11, is inserted into the partial receptacle 204. Alternatively, the plug contact housing 500 can also be placed onto the electrical lines 11 after the electrical blocking device 100 has already been inserted into the holder 201.Subsequently, the system cap 300 is placed on top, covering the free side of the plug contact housing 500, and the partial receptacle 204 of the bearing cap 200 is completed by the partial receptacle 301 of the system cap 300 to form the receptacle 400. Furthermore, the plug contact housing 500 can also be inserted into the receptacle 400 from the outside after the system cap 300 and the bearing cap 200 have been assembled, for example, when installing the belt retractor in the vehicle.

[0034] In the Fig. 8 shows a section of the bearing cap 200 in view of the plug contact housing 500 arranged in the partial receptacle 204. The plug contact housing 500 is shaped in such a way that it protrudes from the front side of the partial receptacle 204. In the Fig. Figure 9 shows a section of the system cap 300, looking toward the plug contact housing 500 arranged in the partial receptacle 301. The plug contact housing 500 is shaped such that it protrudes from the front side of the partial receptacle 301. Furthermore, the plug contact housing 500 is shaped such that it covers the front edges of the partial receptacles 204 and 301 and thus the front edge 401 of the assembled receptacle 400 with a first shoulder 501.

[0035] In the Fig. 10 and Fig. 11, the plug contact housing 500 can be seen in the receptacle 400 in two different sectional planes perpendicular to the electrical lines 11. The partial receptacles 204 and 301 are each U-shaped in cross-section with a base plate and two laterally upstanding and parallel side walls. In the assembled position of the system cap 300 and the bearing cap 200, the partial receptacles 204 and 301 complement each other to form a receptacle 400 with a non-circular cross-section, preferably approximately rectangular or even square, in which the plug contact housing 500 is rotationally fixed with respect to its longitudinal axis or the longitudinal axes of the electrical lines 11. Furthermore, the partial receptacle 301 of the system cap 300 has a groove 302 arranged on one side, which has a shape corresponding to an upstanding nose 503 of the plug contact housing 500.The groove 303 of the partial receptacle 301 and the nose 503 of the plug contact housing 500 together form a shape coding that enables or defines the arrangement of the plug contact housing 500 in exclusively one position and orientation in the receptacle 400. Furthermore, the plug contact housing 500 has a second shoulder 502, with which it rests on the edge of the partial receptacle 204, which faces the partial receptacle 301 of the system cap 300. Furthermore, the two upstanding side walls of the partial receptacle 204 are shaped into thickened projections 205 and 206 to form locking edges. The upstanding side walls of the partial receptacle 301 of the system cap 300 are designed as locking arms with corresponding locking edges. To establish the connection between the system cap 300 and the bearing cap 200, the locking arms 302 are positively fixed by locking behind the locking edges of the projections 205 and 206, as shown in the . Fig.11. The plug contact housing 500 is secured in the receptacle 400. Furthermore, the plug contact housing 500 is supported by the second shoulder 502 on the upper edge of the partial receptacle 204.

[0036] The plug contact housing 500 is positively secured in the electrical lines 11 held therein in the receptacle 400 by having a cross-sectional shape corresponding to the cross-sectional shape of the non-circular receptacle 400 and is thereby fixed in the receptacle 400 in a rotationally fixed manner with respect to its longitudinal axis. Furthermore, during the plugging process of an external plug contact, the plug contact housing 500 is supported via the first shoulder 501 on the front edge 401 of the receptacle 400, so that the connection points between the plug contact housing 500 and the electrical lines 11 are not stressed. In the same way, a positive connection of the plug contact housing 500 in the receptacle 400 can additionally be provided opposite to the plugging direction, i.e., in the withdrawal direction of the external plug contact.

[0037] The additional plug contact housing 500 and its fixation in the receptacle 400 simplify the contacting process, i.e., the installation of the belt retractor itself and the installation of the belt retractor in the vehicle. Furthermore, the contacting process is improved because the electrical lines 11 are no longer subjected to stress when the contact is established. Furthermore, the contact point of the electrical lines 11 is generally relieved of stress by the plug contact housing 500 fixed in the receptacle 400, since the plug contact housing 500 is supported in the receptacle 400 and all reaction forces act in the receptacle 400.

Claims

[1] Belt retractor with -a rotatably mounted belt shaft (20) and and -an electrically actuated blocking device (100) which, when actuated, directly or indirectly blocks the belt shaft (20) in the extension direction, and -an electrical line (11) for contacting the blocking device with an external power supply and / or control device, wherein -a system cap (300) and a bearing cap (200) are provided, and -the bearing cap (200) has a holder (201) for the electrical blocking device (100), and -the system cap (300) covers the bearing cap (200) and the electrical blocking device (100) held thereon in the mounted position towards the outside, characterized by , that -the system cap (300) and the bearing cap (200) each have a partial receptacle (301,204) which, in the assembled position of the system cap (300) and the bearing cap (200), complement each other to form a receptacle (400) for a plug contact housing (500). [2] Belt retractor according to claim 1, characterized by , that -the plug contact housing (500) can be positively fixed in the receptacle (400) in and / or against a plug-in direction predetermined by the plug contact housing (500). [3] Belt retractor according to claim 1 or 2, characterized by , that -the plug contact housing (500) can be positively fixed in the receptacle (400) with respect to a rotational movement about a rotation axis aligned parallel to the longitudinal axes of the electrical lines (11). [4] Belt retractor according to claim 3, characterized by , that -the receptacle (400) has a non-circular, preferably quadrangular, particularly preferably square shape in a plane oriented perpendicular to a predetermined plug-in direction of the plug contact housing (500). [5] Belt retractor according to one of claims 1 to 4, characterized by that the receptacle (400) has a shape coding defining the arrangement and / or orientation of the plug contact housing (500). [6] Belt retractor according to one of claims 1 to 5, characterized by , that -the plug contact housing (500) protrudes from the receptacle (400) and is supported by a first shoulder (501) on an outer edge (401) of the receptacle (400). [7] Belt retractor according to one of claims 1 to 6, characterized by , that -the plug contact housing (500) is supported on at least one of the two mutually facing edge sides of the partial receptacles (301,204) via a second shoulder (502). [8] Belt retractor according to one of claims 1 to 7, characterized by , that -the two partial receptacles (301,204) are connected to each other by a snap-in connection. [9] Belt retractor according to one of claims 1 to 8, characterized by , that -a control disc (21) rotatably mounted on the belt shaft (20) or on the bearing cap (200) is provided, and -the electrically actuated blocking device (100) comprises a housing (1) with a base plate (15) and an upstanding first leg (16), and -a blocking lever (2) with a steel plate (5) pivotally mounted in a pivot bearing of the upright first leg (16), and -the electrically actuated blocking device (100) stops the control disc (21) relative to the belt shaft (20) by engagement of the blocking lever (2) in the toothing of the control disc (21) and thereby forces a blocking pawl to move in which it engages in a toothing of the belt retractor fixed to the vehicle and blocks the belt shaft (20) in the extension direction. [10] Belt retractor according to claim 9, characterized by , that -the blocking lever (2) has a lever arm (22) projecting outwards from the first leg (16) and on which a first spring (4) acts, which pretensions the blocking lever (2) into a position in which it engages with a blocking tip (25) arranged at the end of a blocking arm (23) in the toothing (26) of the control disc (21). [11] Belt retractor according to claim 10, characterized by , that -the blocking device (100) has an electromagnet (3) arranged in the housing (1), which, when energized, exerts a force on the blocking lever (2), by which force it is pulled with the blocking tip (25) out of the toothing (26) of the control disc (21). [12] Belt retractor according to one of claims 1 to 11, characterized by , that -the plug contact housing (500) is dimensionally stable and has a non-circular outer shape corresponding to the shape of the receptacle (400).

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