CN111688632A

CN111688632A - Belt retractor and kit for a vehicle seat

Info

Publication number: CN111688632A
Application number: CN202010689060.4A
Authority: CN
Inventors: 王飞; 汤丹; 黄永亮
Original assignee: Yanfeng Automotive Safety Systems Co Ltd
Current assignee: Yanfeng Automotive Safety Systems Co Ltd
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2020-09-22
Also published as: WO2022012432A1

Abstract

The invention relates to a belt retractor for a vehicle seat, comprising a vehicle sensing device which comprises a rotatable sensor seat having a first axis of rotation. The seatbelt retractor includes a rotatable transmission pulley having a second rotation axis, the first and second rotation axes having an intersection point, the transmission pulley having a push rod biased with respect to the second rotation axis and extending from a body of the transmission pulley, the push rod having a contact point with the sensitive seat, the intersection point and the contact point forming a connection line, the connection line constituting an included angle greater than 60 ° with the first rotation axis. The invention also relates to a kit for a vehicle seat, comprising two belt retractors. The safety belt retractor is simple in structure, compact in size, small in part number and easy to manufacture and install.

Description

Belt retractor and kit for a vehicle seat

Technical Field

The present disclosure relates to the field of vehicle safety technology, and more particularly to a belt retractor for a vehicle seat and a kit comprising two such belt retractors.

Background

In the field of vehicle safety technology, a vehicle seat belt may be a safety protection device for protecting an occupant in the event of an emergency situation of the vehicle, such as an emergency brake, a collision or a rollover, wherein the occupant may be restrained by a belt-shaped webbing, which may be retracted by a spindle of a seat belt retractor and may be fixed to the vehicle by a tongue. Vehicle safety belts can be an important component in vehicle passive safety systems. The vehicle may be, for example, a passenger car, a truck, or other vehicle.

With the development of vehicle technology, the demands of users on vehicle comfort are higher and higher, and the demands on the comfort of vehicle seats are the same. In the development of vehicle seats, the inclination of the seat back has evolved from fixed to adjustable, and the angle of adjustability is becoming greater and greater. In some commercial vehicles, even near-full-flat reclining of the seat back has been achieved.

Some known seatbelt retractors are equipped with a vehicle sensing device that can sense a vehicle state as a mechanical sensor in the seatbelt retractor, for example, can sense an acceleration and a tilt angle of the vehicle, wherein when an emergency occurs in the vehicle, the vehicle sensing device can sense the emergency and can cause a spindle of the seatbelt retractor to lock, preventing the webbing from continuing to be withdrawn from the spindle, so that the occupant can be well restrained by the webbing and thus obtain good safety protection. Typically, earlier vehicle sensing devices were fixedly mounted to the vehicle body or vehicle seat, which may not meet seat back adjustability specifications.

Adaptive vehicle-feel devices are also known which can adjust with the seat back by their own weight. Since the adaptive car-feel device is movable, the adaptive angle adjustment range thereof is limited, and there is room for improvement in car-feel sensitivity. As regards the vehicle-sensing device and the locking device, reference is made, for example, to patent application CN110027502A by the present applicant.

Furthermore, a seatbelt retractor for a vehicle seat is known from patent document CN102991452B, which has a vehicle-sensing device that can be restrained by a core wire. Typically, known seatbelt retractors may be mounted obliquely in a transverse direction in a backrest of a vehicle seat, wherein a rotational axis of the vehicle sensing device and a rotational axis of the transmission case assembly are not parallel to each other. The angular deviation between the two results in the need for additional compensation measures to be provided in the transmission, wherein the winding of the core of the transmission pulley can have a non-circular arc-shaped course, so that the curvature of the winding of the core is modified to adjust the speed of rotation of the transmission pulley and thus compensate for the deviation of the vehicle-sensing device from the vertical position caused by the angular deviation. In a further known prior art, a pinion is additionally arranged between the transmission pulley and the vehicle-sensing device, said pinion being driven by the transmission pulley and being connected to the vehicle-sensing device in the form of a ball joint, whereby deviations of the vehicle-sensing device from the vertical position due to the above-mentioned angular deviations are compensated. These compensation measures make the overall construction of the belt retractor more complex, the number of components and the dimensions larger, and the additional component fit and dimensional chains cause new angular deviations.

Disclosure of Invention

The object of the invention is to provide a belt retractor for a vehicle seat which is simple in construction, compact in size and has a small number of parts, and a kit comprising two such belt retractors.

According to a first aspect of the invention, a belt retractor for a vehicle seat is proposed, which comprises a vehicle sensing device comprising a rotatable sensitive seat having a first axis of rotation, the belt retractor comprising a rotatable transmission pulley having a second axis of rotation, the first and second axes of rotation having an intersection point, the transmission pulley having a push rod which is offset with respect to the second axis of rotation and which protrudes from the body of the transmission pulley, the push rod having a contact point with the sensitive seat, the intersection point and the contact point forming a connecting line which forms an angle with the first axis of rotation of more than 60 °, preferably more than 70 °, in particular more than 80 °, for example 85 °, for example the connecting line may be substantially perpendicular to the first axis of rotation.

In such a belt retractor, the transmission pulley can directly actuate the vehicle sensor device, without the additional compensation measures already mentioned above in the prior art. Therefore, the safety belt retractor has the advantages of simple integral structure, compact size, less part number and easiness in manufacturing and mounting, and the transmission chain comprising the transmission pulley can have high transmission precision.

In some embodiments, the first axis of rotation, the second axis of rotation, and the line of joinder may be coplanar. This makes it possible to make the overall structure of the seatbelt retractor particularly compact, and the vehicle sensor device can be restrained particularly well.

In some embodiments, the connecting line may be perpendicular to the first axis of rotation or the second axis of rotation.

In some embodiments, the second axis of rotation may be parallel to a longitudinal axis of a spindle of a seatbelt retractor.

In some embodiments, the angle of the first rotational axis with the second rotational axis may be determined such that the first rotational axis extends horizontally in the transverse direction of the backrest when the seatbelt retractor is mounted obliquely in the transverse direction of the backrest in the backrest of the vehicle seat.

In some embodiments, the susceptor may have a pair of arms, the push rod may have a ball head, the ball head may be received between the pair of arms, and a center of the ball head may be considered the contact point.

In some embodiments, the susceptor may be rotatably supported by means of two opposing mounting pins defining the first axis of rotation, the intersection point being between the two mounting pins.

In some embodiments, the intersection point may be in the range of the middle 1/3 between two mounting pins.

In some embodiments, the intersection point may be at a midpoint between the two mounting pins. This makes the overall construction of the belt retractor particularly compact.

In some embodiments, the drive pulley may be a component of a drive case assembly, which may further include a first housing component, which may have a center post on which the drive pulley is rotatably mounted, the center post defining a second axis of rotation.

In some embodiments, the gearbox assembly may comprise a second housing component, the first and second housing components forming a housing of the gearbox assembly.

In some embodiments, the second housing part can form a support for the susceptor, which can further lead to a compact construction with a low number of parts.

In some embodiments, the second housing part can have two mounting holes, and the sensitive seat is rotatably supported by means of two opposing mounting pins received in the mounting holes.

In some embodiments, the push rod may extend parallel to the second axis of rotation.

In some embodiments, the vehicle sensing device may include a sensitive ball movably received in a sensitive seat and a sensitive claw covering the sensitive ball.

In some embodiments, the vehicle sensing device may comprise a locking pawl that is directly or indirectly actuatable by a movable sensing element received in a sensing seat. The sensitive element may be a sliding body or a rolling body. Typically, a sphere can be used as the sensing element.

In some embodiments, the vehicle sensing device may comprise a locking pawl drivable by the sensing pawl and configured for co-action with a ratchet wheel mounted on a spindle of a seatbelt retractor.

According to a second aspect of the invention, a kit for a vehicle seat is proposed, comprising a pair of belt retractors for a vehicle seat according to the first aspect of the invention, wherein one first belt retractor is to be mounted in a backrest of a first one of two side-by-side vehicle seats and one second belt retractor is to be mounted in a backrest of a second one of the two side-by-side vehicle seats, the two belt retractors being configured, when mounted in the backrest of the vehicle seat, to be inclined downwards at an angle from the inside to the outside in the transverse direction of the backrest of the vehicle seat, respectively, in a predetermined upright initial position of the backrest of the vehicle seat.

In some embodiments, the two seatbelt retractors may be configured to be inclined downward in a lateral direction of the backrest of the vehicle seat at the same magnitude of angle or different magnitudes of angle in a predetermined upright initial position of the backrest of the vehicle seat when installed in the backrest of the vehicle seat.

In some embodiments, the transmission pulleys of the two belt retractors may be identically constructed.

In some embodiments, the two seatbelt retractors may be identically configured except for a different angle of positioning of the vehicle sensing device with respect to the driving pulley.

In some embodiments, the line of connection of each belt retractor may be perpendicular to the second axis of rotation of the belt retractor.

In some embodiments, the drive pulleys of the two belt retractors may be configured differently.

In some embodiments, the line of connection of each seatbelt retractor may be perpendicular to the first axis of rotation of the seatbelt retractor.

The aforementioned technical features and the technical features mentioned below as well as the technical features shown in the drawings may be combined with each other as desired, provided that they are not mutually contradictory. All technically feasible combinations of features are the technical content described in the specification of the present application.

Drawings

The invention is explained in more detail below with the aid of embodiments and with reference to the drawings. Wherein:

fig. 1 is a schematic side view of a vehicle seat with a seatbelt retractor.

Fig. 2 is a schematic rear view of two vehicle seats arranged side by side with a belt retractor in a predetermined, substantially upright initial position.

Fig. 3 is a schematic side view of the seatbelt retractor of fig. 1.

Fig. 4 is an exploded view of the seatbelt retractor of fig. 3.

Fig. 5 is a schematic view of the plant of fig. 2.

Fig. 6 is an exploded view of the gear box assembly, the ride-on device, and a section of the core assembly of the seatbelt retractor of fig. 3.

FIG. 7 is a schematic view of another embodiment of a kit for a vehicle seat.

Detailed Description

Fig. 1 schematically shows a side view of a vehicle seat with a seatbelt retractor. The vehicle may be a passenger or truck, in particular a motor vehicle which is driven partly or completely autonomously. The vehicle seat has a seat part 5 and a backrest 4, the backrest 4 being tiltable forwards and backwards from a predetermined, substantially upright initial position depicted in fig. 1 by a solid line. The initial position may be optimized for occupant seating and maneuvering of the vehicle. The backrest 4 can be laid down forwards on the seat 5 to make room. The backrest 4 can be adjusted backwards to a maximum inclination close to horizontal, at which the occupant can rest. The maximum inclination position may correspond to an inclination close to 180 °, for example an inclination of about 170 °, with reference to the direction of advance of the vehicle. The backrest 4 can be adjusted to any intermediate position between the predetermined initial position and the maximum inclination position, for example to an inclination of about 120 ° or 135 °, according to the user's needs. The two end positions of the backrest 4 are depicted in fig. 1 with dashed lines.

The retractor main body 1 is fixedly mounted in the backrest 4. The retractor body 1 has an integrated rotatable vehicle sensing device 10 (see fig. 3 and 4). On the pivot of the backrest 4 a recliner assembly 3 may be coaxially mounted, which may be coupled with the vehicle sensory device 10 via a core wire assembly 2, for example by means of a gearbox assembly 9 with the vehicle sensory device 10. In the predetermined substantially upright initial position of the backrest 4, the vehicle sensing device 10 is in a substantially vertical orientation. With the vehicle sensor device fixed relative to the backrest, when the backrest is adjusted rearward by a certain angle from the initial position, the vehicle sensor device is correspondingly oriented away from the vertical by this angle. In the case of an adaptive vehicle-sensing device, when the backrest is adjusted by a certain angle rearward from the initial position, the vehicle-sensing device is adaptively turned and held in the upright orientation by its own weight, however, the movable vehicle-sensing device has room for improvement in sensitivity, and the angle range of the adaptive adjustment typically does not exceed 45 °. In the seatbelt retractor according to the invention, when the backrest 4 is angled back from the initial position, this results on the one hand in a corresponding deviation of the vehicle sensor system 10 from the vertical orientation by this angle, and on the other hand simultaneously in a pulling of the core wire assembly 2 by the recliner disk assembly 3 and finally in a rotation of the vehicle sensor system 10 in the opposite direction by a further angle which can at least partially compensate for the aforementioned angle, particularly preferably substantially completely compensate for the aforementioned angle and thus can substantially maintain the vehicle sensor system 10 in the vertical orientation. Since the activity of the vehicle feel device 10 is constrained by the recliner assembly 3 and the core wire assembly 2, the vehicle feel sensitivity can be compared even with a fixedly mounted vehicle feel device. At the same time, the car feel device can be compared with an adaptive car feel device in terms of positioning angle. In other words, the vehicle interior sensor according to the invention can combine the advantages of a fixedly mounted vehicle interior sensor with the advantages of an adaptive vehicle interior sensor.

Fig. 2 is a schematic rear view of two vehicle seats arranged side by side, each equipped with a belt retractor, which is mounted in the backrest 4 of the respective vehicle seat, in a predetermined, substantially upright initial position. In a predetermined upright initial position of the backrest of the vehicle seat, the retractor bodies 1 of the two belt retractors are respectively inclined downward at an angle θ from the inside to the outside in the transverse direction of the backrest 4 of the vehicle seat, so that the webbing 6 can be optimally oriented and withdrawn. Typically, the two angles θ may be of the same magnitude, but may also be of different magnitudes. The two belt retractors can be of substantially identical design, wherein the angle of positioning of the vehicle-sensing device 10 relative to the spindle of the belt retractor differs, so that the axis of rotation of the vehicle-sensing device 10 is oriented substantially horizontally in the installed state.

Fig. 3 is a schematic view of the seatbelt retractor of fig. 1, and fig. 4 is an exploded view of the seatbelt retractor of fig. 3. As shown in fig. 3 and 4, the retractor main body 1 may include a frame 17. Typically, the frame 17 may be configured as a U-shaped frame. A spindle 26 for winding the webbing is rotatably supported in the frame 17, and may be provided at one axial end with a coil spring that pretensions the spindle 26 in the take-up direction and a coil spring side cover that covers the coil spring, which may be fixed to the frame 17. The wrap spring and wrap spring side covers may form a wrap spring assembly 22. The spindle 26 can carry the ratchet 21 at the other axial end. Here, the retractor body 1 may have a mechanical inner cover 18 and a mechanical outer cover 23. The ratchet 21 may be received in the machine interior cover 18 and the ride-on device 10 may be mounted in the machine interior cover 18. The mechanical inner cover 18 may in turn be received in a mechanical outer cover 23. The mechanical inner cover 18 and the mechanical outer cover 23 may be jointly fixed to the frame 17. In the event of an emergency situation of the vehicle, for example a crash or a roll-over, the vehicle sensing device 10 can lock the ratchet 21 by means of the locking pawl 8, so that the ratchet-guided locking pawl engages into the toothed ring of the frame 17, as can be seen in fig. 3, so that the spindle 26 is locked. As regards the vehicle sensing device 10 and the locking device, reference may be made, for example, to patent application CN110027502A by the present applicant.

The vehicle sensing device 10 may comprise a rotatably supported sensitive seat 14, a sensitive ball 25 movable in the sensitive seat, a sensitive claw 15 covering the sensitive ball, and a locking claw 8. The sensitive seat 14 may have a concave bowl surface in which the sensitive ball 25 is received. In the rest state, the sensitive ball 25 is at the bottom of the bowl surface. In the event of an emergency situation in the vehicle, the sensitive ball 25 moves away from the bottom of the bowl under the force of inertia, lifting the sensitive pawl 15, which in turn lifts the locking pawl 8, so that the locking pawl 8 engages with the ratchet 21, causing the locking of the spindle 26 of the seatbelt retractor.

The seat belt retractor may include a recliner assembly 3 configured for automatically adjusting the angle of orientation of the vehicle sensing device 10 as the seat back adjusts the angle of inclination, ideally so that the vehicle sensing device 10 may remain substantially in a vertical orientation. It is also possible that the recliner assembly 3 may only partially compensate for the angular deviation from the vertical of the vehicle sensing device 10 due to the seat back being adjusted for inclination. For example, when the seat back is tilted backwards from the upright position by 20 ° or to a tilt angle of about 110 ° relative to the vehicle forward direction, the recliner assembly 3 may compensate for only half of the 20 ° angular deviation from the vertical of the vehicle sensing device 10, so that the vehicle sensing device 10 still has an angular deviation of 10 ° from the vertical. This still improves the feel function compared to the case where the feel device 10 is fixedly mounted and thus there is a 20 ° angular deviation.

The recliner assembly 3 may comprise a housing. In particular, the housing may comprise a box-shaped housing part 13 and a cover plate 11, wherein the cover plate 11 may be fixedly mounted to the backrest 4 and the housing part 13 may be fixedly connected with the cover plate 11. The housing is configured for pivotal drive connection with the backrest 4. Advantageously, the housing may be configured for fixed connection coaxially with the pivot axis of the backrest 4. Therefore, when the backrest 4 is pivoted to adjust the reclining angle, the housing is rotated together with the backrest in synchronization. This can be particularly simple in construction. However, it is also possible, for example, for the housing to be in driving connection with the pivot of the backrest 4 by means of a transmission mechanism, for example, to be in driving connection concentrically with the pivot of the backrest 4 by means of a planetary gear mechanism. The housing part 13 can have a core wire insertion, from which core wire insertion 46 the core wire 28 of the core wire assembly 2 can be inserted into the housing and fixed with the end 29 to a core wire fastening of the angle disk 31, for example by means of screws 32. The housing member 13 may have a long diameter portion with a long turning radius and a short diameter portion with a short turning radius. The housing is rotatable in a first rotational direction corresponding to a backrest inclination rearward adjustment direction and in a second rotational direction opposite to the first rotational direction corresponding to a backrest inclination forward adjustment direction.

The recliner assembly 3 may comprise a recliner disc 31 received in the housing, the recliner disc being rotatable relative to the housing. For this purpose, the housing part 13 can have a mounting shaft on which the angle disk 31 is rotatably mounted. The angle adjusting disk 31 may have a long diameter portion having a long turning radius and a short diameter portion having a short turning radius, the long diameter portion may have a core wire fixing portion, and the short diameter portion may have a core wire winding portion. Advantageously, the core wire winding portion may be configured as a circumferential groove of a periphery of the short diameter portion of the angle adjusting disk. Preferably, the depth and width of the circumferential groove are not less than the diameter of the core wire. Advantageously, the core wire 28 may be introduced into the recliner plate assembly 3 in a direction tangential to the core wire winding and fixed to the core wire fixing part. The angular range of rotation of the housing relative to the angle dial 13 defines the effective adjustment range of the angle dial assembly, which may be greater than 60 °, for example, and may be greater than 90 °.

The recliner assembly 3 may include a wrench 12 configured for non-relative rotational mounting with respect to the seat 5, which may limit the rotation of the recliner 13. Particularly advantageously, the recliner assembly may further comprise a wrench slider 7 configured for being fixedly mounted with respect to the seat 5, the wrench 12 and the wrench slider 7 being movable with respect to each other. The combination of the wrench 12 and the wrench slide 7 can be adapted to different vehicle seats, wherein the wrench slide 7 can be simply fixed in the seat 5 and the wrench 12 can be moved appropriately relative to the wrench slide 7, which can compensate for component tolerances and possible changes in the position of the components when the backrest 4 is adjusted to the inclination angle.

In the simplest case, the core assembly 2 may comprise only the core 28. Advantageously, however, the core assembly 2 may additionally comprise a jacket 27. The end of the sheath 27 facing the recliner plate assembly 3 may be fixed in a core lead-in of the housing. The core wire lead-in may open into the short diameter portion of the housing member 13.

The other end 30 of the core wire 28 may be in driving connection with the vehicle sensory device 10, and more specifically, the end 30 of the core wire 28 may be in driving connection with the movable sensitive seat 14 of the vehicle sensory device 10, such that the winding and unwinding of the core wire 28 on the recliner 13 may be transferred to the vehicle sensory device 10. In the illustrated embodiment, the end 30 of the core wire 28 may be coupled to a gear box assembly 9, which in turn is coupled to the ride control device 10. The gearbox assembly 9 may be mounted in a mechanical cover 23.

The gear box assembly 9 may include a gear housing including a first housing component 20 and a second housing component 16. The transmission pulley 19 is rotatably supported on a center post 32 of the first housing part 20. The end 30 of the cord 28 is fixed to the transmission pulley 19 and can be wound around the circumference of the transmission pulley, in particular around a portion of the circumference. The transmission pulley 19 may have a push rod 36 which can operate the susceptor 14. The winding of the core wire 28 on the angle disc 13 causes the effective length of the core wire 28 to be shortened, so that the end 30 of the core wire 28 can carry the transmission pulley 19, and the push rod of the transmission pulley 19 can operate the sensitive seat 14. For example, the push rod may have a ball 37 and the susceptor 14 may have a pair of arms 34 extending from the body, with the ball received between the pair of arms 34. Ideally, the rotation of the sensitive seat 14 due to the backrest inclination adjustment and the rotation due to the winding and unwinding of the core wire can be cancelled out each other, so that the orientation of the sensitive seat 14 can be kept unchanged. Correspondingly, the transmission pulley 19 is also held substantially against rotation, wherein the rotation of the transmission pulley due to the seat back inclination adjustment and the rotation of the transmission pulley due to the winding and unwinding of the wire can substantially cancel each other out. Advantageously, the gearbox assembly 9 may further comprise a return spring 24, which pretensions the core wire 28. The return spring may be a torsion spring. The second housing part 16 can form a support for the sensor receptacle 14, the sensor receptacle 14 being rotatably supported by means of two opposing mounting pins 33, which are mounted in mounting holes 35 of the second housing part 16.

As shown in fig. 5 and 6, the sensitive seat 14 has a first rotation axis a1, which may be defined by the mounting pin 33 mounted in the mounting hole 35. The drive pulley 19 has a second axis of rotation a2, which may be defined by the center post 32. The first axis of rotation a1 and the second axis of rotation a2 have a point of intersection P1, advantageously the point of intersection P1 may be at the midpoint between the two mounting pins 35. The push rod 36 of the transmission pulley 19 may be offset with respect to the second rotation axis a2 and protrude from the body of the transmission pulley 19, the push rod 36 may have a contact point P2 with the sensitive seat 14. The center of the ball 37 of the push rod 36 can be regarded as a contact point P2. The intersection point P1 and the contact point P2 form a connecting line A3. The connecting line A3 makes an angle with the first axis of rotation a1 of more than 60 °, in particular more than 70 °, in particular more than 80 °, preferably more than 85 °, for example the connecting line A3 is substantially perpendicular to the first axis of rotation a 1. Particularly advantageously, the first axis of rotation a1, the second axis of rotation a2, and the connecting line A3 may be substantially coplanar.

In the kit for a vehicle seat shown in fig. 5, two seatbelt retractors, each having a connecting line A3 perpendicular to the second rotational axis a2, may be identically constructed except for the different positioning angles of the vehicle sensing device 10 with respect to the transmission pulley 19. This embodiment may be particularly advantageous when the inclination angle θ is small, for example not exceeding 20 °.

In another embodiment of the kit for a vehicle seat shown in fig. 7, the push lever 36 of the transmission pulley 19 is constructed with a different length in addition to the different positioning angle of the vehicle sensor device 10 with respect to the transmission pulley 19, wherein the connecting line A3 of each seatbelt retractor is perpendicular to the first rotation axis a1, in other respects, the two seatbelt retractors may be constructed identically. This embodiment may be particularly advantageous when the inclination angle θ is large, for example, exceeding 20 °. Only the transmission case assembly 9 and the vehicle sensing device 10 of the seatbelt retractor are described in fig. 7, and other components of the seatbelt retractor are omitted. For these further components, reference may be made to fig. 5 and the detailed description with respect to fig. 5.

It is noted that the terminology used herein is for the purpose of describing particular aspects only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be understood that the terms "comprises" and "comprising," and other similar terms, when used in this specification, specify the presence of stated operations, elements, and/or components, but do not preclude the presence or addition of one or more other operations, elements, components, and/or groups thereof. The term "and/or" as used herein includes all arbitrary combinations of one or more of the associated listed items. In the description of the drawings, like reference numerals refer to like elements throughout.

The thickness of elements in the figures may be exaggerated for clarity. It will be further understood that if an element is referred to as being "on," "coupled to" or "connected to" another element, it can be directly on, coupled or connected to the other element or intervening elements may be present. Conversely, if the expressions "directly on … …", "directly coupled with … …", and "directly connected with … …" are used herein, then there are no intervening elements present. Other words used to describe the relationship between elements, such as "between … …" and "directly between … …", "attached" and "directly attached", "adjacent" and "directly adjacent", etc., should be similarly interpreted.

Terms such as "top," "bottom," "above," "below," "over," "under," and the like, may be used herein to describe one element, layer or region's relationship to another element, layer or region as illustrated in the figures. It will be understood that these terms are intended to encompass other orientations of the device in addition to the orientation depicted in the figures.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Thus, a first element could be termed a second element without departing from the teachings of the present inventive concept.

It is also contemplated that all of the exemplary embodiments disclosed herein may be combined with each other as desired. Finally, it is pointed out that the above-described embodiments are only intended to be understood as an example of the invention and do not limit the scope of protection of the invention. It will be apparent to those skilled in the art that modifications may be made in the foregoing embodiments without departing from the scope of the invention.

Claims

1. A seatbelt retractor for a vehicle seat comprises a vehicle sensing device (10), the vehicle sensing device comprises a rotatable sensor seat (14) having a first axis of rotation (A1), characterized in that the belt retractor comprises a rotatable transmission pulley (19) having a second axis of rotation (A2), the first and second axes of rotation having an intersection point (P1), the transmission pulley having a push rod (36), said pusher rod being offset with respect to the second axis of rotation and projecting from the body of the transmission pulley, said pusher rod having a contact point (P2) with the susceptor, the point of intersection and the point of contact form a connecting line (A3) which forms an angle with the first axis of rotation (a1) of more than 60 °, preferably more than 70 °, for example more than 80 °.

2. The seatbelt retractor for a vehicle seat according to claim 1, wherein the first rotational axis (a1), the second rotational axis (a2) and the connecting line (A3) are coplanar; and/or

The connecting line is perpendicular to the first rotating axis or the second rotating axis.

3. The seatbelt retractor for a vehicle seat according to claim 1 or 2, wherein the second axis of rotation is parallel to a longitudinal axis (a0) of a spindle of the seatbelt retractor, and the angle of the first axis of rotation and the second axis of rotation is determined such that the first axis of rotation extends horizontally in a transverse direction of the backrest when the seatbelt retractor is mounted obliquely in the transverse direction of the backrest in a backrest of the vehicle seat.

4. The seatbelt retractor for a vehicle seat according to any one of claims 1 through 3, wherein the sensitive seat has a pair of arms (34), the push lever has a ball head (37) received between the pair of arms, a center of sphere of the ball head being regarded as the contact point; and/or

The sensitive seat is rotatably supported by means of two opposite mounting pins (33) defining the first axis of rotation (a1), the point of intersection (P1) being between the two mounting pins;

preferably, the point of intersection (P1) is at the midpoint between the two mounting pins.

5. The seatbelt retractor for a vehicle seat according to any one of claims 1 to 4, wherein the transmission pulley is a component of a transmission case assembly (9) further comprising a first housing component (20) having a center post (32) on which the transmission pulley is rotatably mounted, the center post defining a second axis of rotation;

preferably, the gearbox assembly comprises a second housing part (16), which forms a housing of the gearbox assembly, which second housing part forms a carrier for a sensitive mount, which second housing part has two mounting holes (35), which sensitive mount is rotatably supported by means of two opposite mounting pins (33) received in the mounting holes.

6. The seatbelt retractor for a vehicle seat according to any one of claims 1 to 5, wherein the push lever extends in parallel with the second rotation axis.

7. A kit for a vehicle seat, characterized in that the kit comprises a pair of belt retractors for a vehicle seat according to any one of claims 1 to 6, wherein one first belt retractor is to be mounted in a backrest of one first vehicle seat among two side-by-side vehicle seats and one second belt retractor is to be mounted in a backrest of one second vehicle seat among the two side-by-side vehicle seats, the two belt retractors being configured to, when mounted in the backrest of the vehicle seat, in a predetermined upright initial position of the backrest of the vehicle seat, slope downward at an angle (θ) from inside to outside, respectively, in a transverse direction of the backrest of the vehicle seat.

8. The kit for a vehicle seat according to claim 7, characterized in that the two seatbelt retractors are configured to be inclined downward at an angle (θ) of the same magnitude in a lateral direction of the backrest of the vehicle seat in a predetermined upright initial position of the backrest of the vehicle seat when mounted in the backrest of the vehicle seat.

9. The kit for a vehicle seat according to claim 7 or 8, characterized in that the transmission pulleys of the two seatbelt retractors are identically constructed;

preferably, the two seatbelt retractors are configured identically, except for the different positioning angles of the vehicle sensing device with respect to the transmission pulley;

preferably, the connecting line of each seatbelt retractor is perpendicular to the second axis of rotation of the seatbelt retractor.

10. The kit for a vehicle seat according to claim 7 or 8, characterized in that the transmission pulleys of the two seatbelt retractors are differently configured;

preferably, the line of connection of each seatbelt retractor is perpendicular to the first axis of rotation of the seatbelt retractor.