Belt retractor having an electrically actuatable blocking device

Abstract

The belt retractor has a belt shaft (20) rotatably mounted thereon, an electrically actuable locking device (100) which, when actuated, directly or indirectly brings about the locking of the belt shaft (20) in the pulling-out direction, and an electrical line (11) for contacting the locking device with an external power supply and / or a control device, and a system cap (300) and a bearing cap (200) are provided, the bearing cap (200) has a holder (201) for the electrical locking device (100), the system cap (300) covers the bearing cap (200) and the electrical locking device (100) held thereon facing outwards in the installation position, and the system cap (300) and the bearing cap (200) each have complementary sub-receiving areas (301, 204) for forming a receiving area (400) for a plug contact housing when the system cap (300) and the bearing cap (200) are in the installation position.

Description

Technical Field

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

[0002] An electrically operable blocking device of this type is known, for example, from British Patent Application Publication No. 2398824 (A).

[0003] Such a blocking device is used to stop an externally toothed control disk rotatably mounted on the belt shaft of the belt retractor relative to the belt shaft by engagement of a blocking lever, and as a result, to force a blocking claw to perform a control movement to a toothed part fixed to the vehicle, and as a result, the belt shaft is blocked in the pulling-out direction.

Background Art

[0004] In a conventional mechanical locking device, an inert mass is applied to a contact surface, which deflects when a predefined vehicle deceleration is exceeded, thereby deflecting a locking lever and engaging the locking lever within teeth of a control disk. Such a mechanical locking device is also referred to as a vehicle-sensing sensor device. One problem with these mechanical locking devices is that, in order to prevent the belt shaft from being inadvertently locked, the inert mass must always be aligned in a defined orientation on the contact surface with respect to the vehicle longitudinal axis and the vehicle transverse axis, regardless of the installation geometry of the belt retractor. Thus, the belt retractor must be designed to be vehicle-specific in that the orientation of the contact surface and the mass applied to the contact surface with respect to the belt retractor are individually designed to correspond to a predefined orientation taking into account the installation geometry of the belt retractor within the vehicle. Further, in the case of a belt retractor integrated within the front seat, for example, in the case of a convertible, when the tilt angle of the backrest is adjusted to access the back seat, or when the backrest is folded forward, there is a problem that the inert mass inadvertently deflects onto the contact surface, resulting in the locking lever being inadvertently pushed into the teeth of the control disk for a control movement. Thus, the belt retractor is locked in the retracting direction and the backrest can no longer pivot, or the occupant cannot wear the seat belt. To prevent this, additional release or compensation mechanisms must be provided, but these mechanisms can only act in these cases in order to guarantee the restraint of the occupant in all cases in the event of an accident. As a result of achieving these objectives, this type of mechanical locking device is mechanically very complex.

[0005] In the case of an electrically actuable locking device, in contrast, as is known from, for example, British Patent Application Publication No. 2398824(A), the movement of the locking lever is electrically controlled, and as a result, the previously required inert mass is omitted. This allows the belt retractor to be mounted without change at different installation positions within the vehicle and within the seat back. Further, the locking of the belt shaft can be controlled by an electrical signal proceeding from the control device. In this case, the signal can be generated by the control device, which can also generate the signal in response to other sensor devices or control systems. For example, when a dynamic assistance system is activated, it is contemplated to automatically lock the belt shaft, and the dynamic assistance system is controlled, for example, in response to a signal from an optical sensor device. Thus, the electric locking device is also controlled directly or indirectly in response to the signal of the optical sensor device. Further, the electrically actuable locking device is not actuated by inertial forces and thus does not need to be oriented in a specific orientation with respect to the vehicle travel direction and thus functions in any orientation and arrangement. Thus, it can preferably also be arranged on the seat of at least a semi-autonomous vehicle, and the occupant can use the seat to adjust for improved communication with other occupants, for alignment in the stationary position, or generally for the degree of freedom obtained by autonomous driving in a much wider adjustment range than was possible in the case of the seats of conventional non-autonomous vehicles.

[0006] One problem with a belt retractor with such an electrically actuable locking device is that the belt retractor must have one or more electrical lines for controlling the locking device, and this electrical line must be in contact with an external control device or power source. This is particularly problematic because electrical contact can only be established when the belt retractor is installed in the vehicle, and vehicle manufacturers place particular emphasis on contacts that are as easy to handle as possible and can surely be realized. SUMMARY OF THE INVENTION

[0007] The object of the present invention is to provide a belt retractor having an electrically actuatable blocking device, which blocking device should have easy-to-handle electrical contacts.

[0008] To achieve this object, a belt retractor having the features of claim 1 is proposed. Furthermore, preferred embodiments of the present invention result from the dependent claims, the figures, and the associated description.

[0009] According to the basic idea of the present invention, it is proposed that the system cap and the bearing cap each have complementary sub-receiving areas at the installation positions of the system cap and the bearing cap, respectively, for forming a receiving area for the plug contact housing.

[0010] The advantage of the proposed solution is that the produced receiving area forms a simple guide for inserting the plug contact housing during installation. Alternatively, the plug contact housing can also already be held within the belt retractor receiving area, which plug contact housing is electrically connected to the electrical line and can easily come into contact with the counter contact during installation. The receiving area is formed by the sub-receiving area on the bearing cap and the sub-receiving area on the system cap, so that when the belt retractor is installed and the system cap is placed on the bearing cap, the receiving area is automatically formed. It is particularly advantageous that the two already provided parts, namely the bearing cap and the system cap, are used here, so that the receiving area is very simple structurally and can be realized with a minimum of additional effort and a minimum of additional costs. Furthermore, the receiving area is intentionally formed by the sub-receiving area on the bearing cap, on which a holder for the blocking device is also arranged, so that the receiving area is arranged in a direct spatial relationship to the blocking device held within the holder and whose electrical line is contacted.

[0011] It is further proposed that the plug contact housing can be fixed in a form-fitting manner in the receiving area in the plug-in direction defined by the plug-in contact housing and / or in the opposite direction. Such form-fitting fixation of the plug contact housing can be formed, for example, by protrusions, grooves, or lugs that fix the plug contact housing so that it does not displace in a predefined direction. The proposed solution enables the plug contact housing to be supported within or on the receiving area during the plug-in process and / or removal process of the counter contact. Thus, the plug-in and / or removal process is facilitated by preventing the plug contact housing from slipping during the plug-in process or being pulled during removal. Furthermore, this prevents the connection between the electrical line and the plug contact housing from being stressed during the plug-in and / or removal process when contact is made via a plug contact housing that is already fixed within the receiving area and connected to the electrical line. In addition, the plug contact housing is thereby fixed in a predefined orientation. This simplifies the plug-in process itself, and the handler can more easily find the plug contact housing with internal wiring and bring it into contact with the counter contact.

[0012] Furthermore, it is proposed that the plug contact housing can be fixed in a form-fitting manner in the receiving area against a rotational movement about a rotation axis oriented parallel to the longitudinal axis of the electrical line. A further proposed development is to fix the plug contact housing against torsion with respect to the longitudinal axis of the electrical line.

[0013] The contact design can be very easily realized in that the receiving area has a non-circular, preferably quadrilateral, particularly preferably square shape in a plane oriented perpendicular to the predefined plug-in direction of the plug contact housing. The non-circular, quadrilateral or square shape of the receiving area determines the angular orientation of the plug contact housing inserted into the receiving area, and this angular orientation is adapted to the orientation of the electrical contacts to be contacted. If the plug contact housing is already held within the receiving area, the orientation of the plug contact housing is determined by the shape of the receiving area. Furthermore, the shape of the receiving area provides support for the plug contact housing such that the plug contact housing is fixed in the predefined orientation even when an external force is applied.

[0014] It is further proposed that the receiving area has a shape coding that defines the arrangement and / or orientation of the plug contact housing. The shape coding of the receiving area defines the predefined arrangement and orientation of the plug contact housing in the receiving area. Thus, the plug contact housing can be arranged and held within the receiving area only in the predefined arrangement or orientation. This predefined orientation of the plug contact housing can be designed, for example, for a particularly preferred and very stress-free arrangement and supply of the electrical lines in the electrical blocking device to the plug contact housing. In addition, the shape coding not only directly informs the person performing the installation position where the plug contact housing has to be installed, but also prevents the plug contact housing from being installed in a different incorrect orientation, because this is not possible due to the shape coding. The shape coding can be realized, for example, by lugs, grooves or steps protruding on one side.

[0015] It is further proposed that the plug contact housing protrudes from the receiving area and is supported by a first shoulder on the outer edge of the receiving area. By supporting the plug contact housing, the plug-in force during contact is transmitted via the plug contact housing to the receiving area, so that the electrical lines in the plug contact housing are not stressed except for inevitable frictional forces.

[0016] It is further proposed that the plug contact housing is supported on at least one of two mutually facing edge sides of the sub-receiving area via a second shoulder. The second shoulder limits the insertion depth of the plug contact housing into each sub-receiving area. Further, the plug contact housing can be clamped more effectively in the receiving area between the sub-receiving areas.

[0017] It is further proposed that two sub-receiving areas are connected to each other by a latch connection. The latch connection is advantageous in that it can be manufactured very cost-effectively without any tools, for example by integrally forming the latch edge and the latch arm in the partial receiving area by a plastic injection molding process.

[0018] A control disk rotatably mounted on a belt shaft or a bearing cap is provided, and an electrically actuable blocking device has a housing with a base plate and a first upright rim, and is pivotally mounted on a pivot bearing of the first upright rim and has a blocking lever with a steel plate. The electrically actuable blocking device stops the control disk relative to the belt shaft (20) by engaging the blocking lever with the toothed portion of the control disk, thereby forcing the blocking claw to engage with the toothed portion fixed to the vehicle of the belt retractor, and further proposed to block the belt shaft in the pulling-out direction. The trigger for blocking the belt shaft to stop the control disk and the resulting forced movement of the blocking claw have been proven in practice for a long time. The control disk only serves to control the movement of the blocking claw, and all forces for restraining the occupant are absorbed by the blocking claw engaging with the toothed portion fixed to the vehicle.

[0019] The blocking lever has a lever arm that protrudes outward from the first rim, and a first spring acts on the lever arm. The first spring preloads the blocking lever to a position where the blocking lever engages the blocking tip disposed at the end of the blocking arm with the tooth portion of the control disk. It is further proposed that the proposed solution is designed such that in the initial state, the control disk is blocked and the belt shaft of the belt retractor is blocked.

[0020] It is further proposed that the blocking device has an electromagnet disposed within the housing, and this electromagnet exerts a force on the blocking lever upon energization, and by this force, the blocking lever is pulled out from the tooth portion of the control disk together with the blocking tip. The electric blocking device is designed to release the blocking of the belt shaft when the blocking lever is pulled out from the tooth portion of the control disk upon energization, and to automatically block when the energization is interrupted. This is advantageous, for example, in the case of a power outage such as a major accident. Because in this case, the occupant is restrained by the seat belt.

[0021] It is further proposed that the plug contact housing is dimensionally stable and has a non-circular outer shape corresponding to the shape of the receiving area. When the plug contact housing is first inserted during installation in the vehicle, the proposed solution provides the advantage of an improved anti-twist insertion movement into the receiving area of the plug contact housing. When the plug contact housing is already disposed within the receiving area of the belt retractor and the contact of the belt retractor is made via the plug contact housing, the proposed solution provides the advantage that the plug contact housing is thereby fixed in a predetermined orientation within the receiving area and can support itself at this position within the receiving area.

Brief Description of the Drawings

[0022] The present invention will be described below based on preferred embodiments with reference to the accompanying drawings. The drawings are as follows.

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DETAILED DESCRIPTION OF THE INVENTION

[0023] An electrically operable blocking device 100 used in the applicant's product by the applicant and corresponding to the embodiment of UK Patent Application Publication No. 2398824(A) is shown in FIGS. 1 and 2. The electrically operable blocking device 100 basically comprises a housing 1 having an L-shaped basic structure with a base plate 15 and a first upright rim 16, a blocking lever 2 pivotally mounted on the first upright rim 16 of the housing 1, an electromagnet 3, and a first spring 4 held by one end of the housing 1 and connected by the other end of a lever arm 22 of the blocking lever 2 protruding outward from the first upright rim 16. The first spring 4 is designed as a tension spring, whereby the first spring 4 preloads the blocking lever 2 into a position where the blocking lever 2 engages with the blocking tip 25 within the teeth 26 of the control disk 21, thereby holding the control disk 21 back against the belt shaft 20. The control disk 21 with the teeth 26 can only be seen in FIG. 3 in a prior art belt retractor. In this way, when the belt shaft 20 rotates in the pulling-out direction, the blocking claw is automatically pushed into the teeth fixed to the vehicle, and the belt shaft 20 is then blocked against further pulling out of the belt. The blocking lever 2 comprises a contour portion 24 and a steel plate 5, and the steel plate 5 faces the electromagnet 3. Therefore, when the electromagnet is energized, the blocking lever 2 is attracted by the electromagnet 3 and thus pulled out from the teeth 26 of the control disk 21. As a result, the belt shaft 20 can then rotate freely in both the pulling-out and pulling-in directions. The advantage of this solution is that even in the event of a power failure or a defect in the electromagnet 3, the belt shaft 20 is blocked in the pulling-out direction, and in this case too, the occupant is reliably restrained.

[0024] The electromagnet 3 comprises a base component 6 having a columnar central portion 7 and two radial flanges 8, one of the flanges 8 protruding radially outwards at one of the ends of the central portion 7 in each case. 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 through portion 14 in the central portion 7 and has an annular intermediate space 9 radially on the outside above the central portion 7, the annular intermediate space 9 being limited towards the end central portion 7 by the radial flange 8. Furthermore, the electromagnet 3 comprises a coil 10 having a plurality of windings, the coil 10 being arranged in the annular intermediate space 9 and being in electrical contact with an external control device via a line 11 provided in the base component 6. In addition, the electromagnet 3 comprises a first iron core 12, the first iron core 12 being arranged in the tubular through portion 14 of the base component 6 and having its free end facing the steel plate 5 of the blocking lever 2.

[0025] When the coil 10 is energized, the blocking lever 2 is attracted to close the first magnetic circuit I, which is defined by the first upright rim 16 of the housing 1, the first iron core 12, and the portions of the blocking lever 2 and the base plate 15 between the first iron core 12 and the first upright rim 16, as can be seen in the right-hand view of FIG. 2. Furthermore, a damping element 13 is provided in the form of an essentially flexible tube, for example in the form of a short tube piece, which element is clamped at its ends between two extensions of the radial flange 8 facing the blocking lever 2. The damping element 13 is arranged such that the free end of the blocking lever 2 does not rest against the damping element 13 in the deflected position (left-hand view of FIG. 2), but only rests on the central soft portion of the damping element 13 between the clamping points in the attracted position (right-hand view of FIG. 2). As a result, the attracting movement of the blocking lever 2 is damped in the final stage of the movement. As a result of this damping, a soft stop is achieved and disturbing "rattling noises" are avoided during the attracting movement of the blocking lever 2 and any subsequent slight movement that may occur.

[0026] The blocking device 100 is fixedly installed within a holder 201 of a bearing cap 200 that can mount the control disk 21 and / or the belt shaft 20. The bearing cap 200 itself is held on the frame 17 of the belt retractor as can be seen in Figure 4. Further, the bearing cap 200 can have, on its outer side, a contour portion 202 in the form of a tooth portion or a bearing structure for a gear drive for an ELR / ALR switching device. Further, the bearing cap 200 has a recess 203, and the control disk 21 arranged within the bearing cap 200 is exposed to the outside through this recess, so that the blocking lever 2 having a blocking tip 25 can be guided from the outside into the tooth portion 26 of the control disk 21.

[0027] The bearing cap 200 is externally covered by a system cap 300 that can be seen in Figure 4. This system cap is fixedly installed directly on the frame 17 or is fixedly installed on the frame 17 indirectly via the bearing cap 200. Thus, the system cap 300 covers the bearing cap 200 and the blocking device 100 held thereon towards the outside, forming protection for the blocking device 100 and other components on the bearing cap 200 against external mechanical influences.

[0028] The electrically actuable blocking device 100 is here shown with reference to an embodiment in which the blocking lever 2 is spring-biased in the engaged position. However, the electrically actuable blocking device 100 can also be designed such that the blocking lever is spring-biased in a direction opposite to the engagement direction and is driven to perform an engagement movement within the tooth portion 26 only by the magnetic force acting thereon when the electromagnet 10 is energized. Furthermore, an electrically actuable blocking device 100 can be used which triggers the blocking of the belt shaft 20 during energization or when the current is interrupted by a mechanically blocking device designed differently. What is important for the present invention is only that the electrically actuable blocking device has an electrical line 11 which must be contacted when installing the belt retractor or when installing the belt retractor in a vehicle.

[0029] Figs. 5 to 7 show a new bearing cap 200 of a further developed belt retractor, a new system cap 300, and a further developed electrically actuable blocking device 100. The belt retractor according to the present invention is formed by replacing the bearing cap 200, the system cap 300, and the electrically actuable blocking device 100 in the belt retractor shown in Figs. 3 and 4 with the bearing cap 200, the system cap 300, and the electrically actuable blocking device 100 shown in Figs. 5 to 7. In other respects, the components of the belt retractor, in particular the frame 17 with its fixing points, can remain unchanged.

[0030] The electric blocking device 100, bearing cap 200, and system cap 300 of FIGS. 5 to 7 correspond to the electric blocking device 100, bearing cap 200, and system cap 300 shown in FIGS. 1 to 4 in their basic structures, and the bearing cap 200, system cap 300, and blocking device 100 of FIGS. 5 to 7 will be described below. The bearing cap 200 has a holder 201 in which the electric blocking device 100 is held. The holder 201 extends radially outward to form a sub-receiving area 204. The system cap 300 also has a sub-receiving area 301 that extends radially outward. Further, a plug contact housing 500 is provided, and this plug contact housing is positioned on the free electric line 11 of the blocking device 100 and is connected to the free electric line 11, for example, in a crimping process.

[0031] In the installation position, both the system cap 300 and the bearing cap 200 form a receiving area 400 in the intermediate space between the sub-receiving area 301 of the system cap 300 and the sub-receiving area 204 of the bearing cap 200, and the plug contact housing 500 is held within this receiving area. For installation, the plug contact housing 500 is placed on the electric line 11 of the electric blocking device 100. Thereafter, the blocking device 100 is inserted into the holder 201 of the bearing cap 200, and the plug contact housing 500 held there via the electric line 11 is inserted into the sub-receiving area 204. Alternatively, the plug contact housing 500 can be positioned on the electric line 11 after the electric blocking device 100 has already been inserted into the holder 201. Then, the system cap 300 is placed to cover the free side of the plug contact housing 500, and the sub-receiving area 204 of the bearing cap 200 is completed by the sub-receiving area 301 of the system cap 300 to form the receiving area 400. Further, the plug contact housing 500 can be inserted into the receiving area 400 from the outside, for example, when installing a belt retractor in a vehicle, after the system cap 300 and the bearing cap 200 have been assembled.

[0032] In FIG. 8, a cross-section of the bearing cap 200 can be seen in the view of the plug contact housing 500 disposed within the sub-receiving area 204. The plug contact housing 500 is formed to protrude from the front side of the sub-receiving area 204. FIG. 9 shows a cross-section of the system cap 300 in the view of the plug contact housing 500 disposed within the sub-receiving area 301. The plug contact housing 500 is shaped to protrude from the front face of the sub-receiving area 301. Further, the plug contact housing 500 is shaped to cover the front edges of the sub-receiving areas 204 and 301, and thus the front edge 401 of the assembled receiving area 400, with a first shoulder 501.

[0033] In FIGS. 10 and 11, the plug contact housing 500 can be seen in two different cross-sections perpendicular to the electrical line 11 in the receiving area 400. The sub-receiving areas 204 and 301 each have a U-shaped cross-section with a base plate and two laterally upright side walls oriented parallel to each other. In the assembled positions of the system cap 300 and the bearing cap 200, the sub-receiving areas 204 and 301 complement each other to form a receiving area 400 having a non-circular cross-section, preferably a substantially rectangular or square cross-section, and the plug contact housing 500 is fixed non-rotatably with respect to its longitudinal axis or the longitudinal axis of the electrical line 11. Further, the sub-receiving area 301 of the system cap 300 has a groove 302 arranged on one side and having a shape corresponding to the upright lug 503 of the plug contact housing 500. The groove 303 in the sub-receiving area 400 and the lug 503 of the plug contact housing 500 together form a shape coding that enables or defines the arrangement of the plug contact housing 500 only at one position and orientation within the receiving area 301. Further, the plug contact housing 500 has a second shoulder 502 that is placed on the edge side of the sub-receiving area 301 facing the sub-receiving area 204 of the system cap 300. Further, the two upright side walls of the sub-receiving area 204 are formed into thickened protrusions 205 and 206 to form a latching edge. The upright side walls of the sub-receiving area 301 of the system cap 300 are designed as latching arms having corresponding latching edges. To establish the connection between the system cap 300 and the bearing cap 200, the latching arm 302 is fixed in a form-fitting manner by latching behind the latching edges of the protrusions 205 and 206 as can be seen in FIG. 11. The plug contact housing 500 is fixed within the receiving area 400. Further, the plug contact housing 500 is supported on the upper edge side of the sub-receiving area 204 via the second shoulder 502.

[0034] The plug contact housing 500 has a cross-sectional shape corresponding to the cross-sectional shape of the non-circular receiving area 400, whereby it is fixed in a rotationally immovable manner with respect to its longitudinal axis within the receiving area 400 and is form-fittingly fixed to the electrical line 11 held therein within the receiving area 400. Furthermore, during the plug-in process of the external plug contact, the plug contact housing 500 is supported via a first shoulder 501 on the front edge 401 of the receiving area 400, so that the connection point between the plug contact housing 500 and the electrical line 11 is not subjected to stress. Similarly, the form-fitting connection of the plug contact housing 500 within the receiving area 400 can also be provided in the direction opposite to the plug-in direction, i.e., in the removal direction of the external plug contact.

[0035] The additionally provided plug contact housing 500 and its fixation within the receiving area 400 simplify the contact, i.e., the installation of the belt retractor itself and the installation of the belt retractor into the vehicle. Furthermore, the contact is further improved because the electrical line 11 is no longer subjected to stress when the contact is made. Furthermore, since the plug contact housing 500 is supported within the receiving area 400 and all reaction forces act within the receiving area 400, the contact point of the electrical line 11 is, in principle, released via the plug contact housing 500 fixed within the receiving area 400.

Claims

1. A belt retractor, a rotatably mounted belt shaft (20); an electrically actuatable blocking device (100) that, when activated, directly or indirectly blocks the belt shaft (20) in the unwinding direction; an electric line (11) for contacting the blocking device with an external power source and / or a control device; A system cap (300) and a bearing cap (200) are provided; The bearing cap (200) has a holder (201) for the electrical blocking device (100), The system cap (300) externally covers the bearing cap (200) and the electrical blocking device (100) held on the bearing cap in an installed position; 1. A belt retractor, characterized in that the system cap (300) and the bearing cap (200) each have sub-receiving areas (301, 204) that complement each other to form a receiving area (400) for a plug contact housing in the installation position of the system cap (300) and the bearing cap (200).

2. A belt retractor as described in claim 1, characterized in that the plug contact housing (500) can be fixed in the receiving area (400) in a form-fitting manner in a plug-in direction determined by the plug-in contact housing (500) and / or in the opposite direction.

3. A belt retractor as described in claim 1 or 2, characterized in that the plug contact housing (500) can be fixed in the receiving area (400) in a form-fitting manner for rotational movement around a rotation axis oriented parallel to the longitudinal axis of the electrical line (11).

4. A belt retractor as described in claim 3, characterized in that the receiving area (400) has a non-circular, preferably quadrilateral, particularly preferably square, shape in a plane oriented perpendicular to the predetermined plug-in direction of the plug contact housing (500).

5. 3. A belt retractor according to claim 1 or 2, characterized in that the receiving area (400) has a shape coding that defines the arrangement and / or orientation of the plug contact housing (500).

6. A belt retractor as described in claim 1 or 2, characterized in that the plug contact housing (500) protrudes from the receiving area (400) and is supported by a first shoulder (501) on the outer edge (401) of the receiving area (400).

7. A belt retractor as described in claim 1 or 2, characterized in that the plug contact housing (500) is supported on at least one of the two mutually facing edge sides of the sub-receiving area (301, 204) via a second shoulder (502).

8. A belt retractor as described in claim 1 or 2, characterized in that the two sub-receiving areas (301, 204) are connected to each other by a latch connection.

9. A control disk (21) rotatably mounted on the belt shaft (20) or the bearing cap (200) is provided, The electrically actuatable blocking device (100) has a housing (1) with a base plate (15) and an upstanding first rim (16); a blocking lever (2) pivotally mounted in a pivot bearing of said upstanding first rim (16) and having a steel plate (5); 3. The belt retractor according to claim 1, wherein the electrically operable 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), thereby forcing a blocking pawl to move into engagement with toothing fixed to the vehicle and blocking the belt shaft (20) in the unwinding direction.

10. A belt retractor as described in claim 9, characterized in that the blocking lever (2) has a lever arm (22) protruding outward from the first rim (16), a first spring (4) acts on the lever arm (22), and the first spring (4) preloads the blocking lever (2) to a position where the blocking lever (2) engages a blocking tip portion (25) located at the end of the blocking arm (23) with the tooth portion (26) of the control disc (21).

11. A belt retractor as described in Claim 10, characterized in that the blocking device (100) has an electromagnet (3) arranged in the housing (1), and when current is passed through the electromagnet (3), it exerts a force on the blocking lever (2), and the force causes the blocking lever together with the blocking tip portion (25) to be pulled out from the tooth portion (26) of the control disc (21).

12. A belt retractor as described in claim 1 or 2, characterized in that the plug contact housing (500) is dimensionally stable and has a non-circular outer shape corresponding to the shape of the receiving area (400).

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