Angle adjustment disc assembly for seat belt retractor and seat belt retractor

Abstract

The present invention relates to an angle adjustment disk assembly for a seat belt retractor, which is used to adjust the positioning angle of a vehicle sensing device, and includes a housing and an angle adjustment disk. The housing is used to be connected to the pivot transmission of a backrest of a vehicle seat, and the angle adjustment disk is received in the housing. The angle adjustment disk can rotate relative to the housing, and the angle adjustment disk has a core wire fixing portion. The angle adjustment disk has a long diameter portion and a short diameter portion, and the short diameter portion has a core wire winding portion extending from the core wire fixing portion in a first rotation direction. When the housing rotates relative to the angle adjustment disk in the first rotation direction, the core wire can be wound on the core wire winding portion. The first rotation direction corresponds to the backrest backward tilt angle adjustment direction. The housing includes a housing component, and the housing component has a long diameter portion and a short diameter portion. The short diameter portion of the angle adjustment disk is opposite to the short diameter portion of the housing component and is radially spaced apart from the long diameter portion of the housing component. The present invention also relates to a seat belt retractor including an angle adjustment disk assembly. The angle adjustment disk assembly has a compact structure, a small number of parts, and is easy to install.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicle safety, and more particularly, to an angle adjustment disc assembly for a seat belt retractor and a seat belt retractor including such an angle adjustment disc assembly. Background Art

[0002] In the field of vehicle safety technology, a vehicle safety belt may be a safety protection device used to protect passengers when a vehicle encounters an emergency situation such as emergency braking, collision or rollover, wherein the passenger may be restrained by a belt-shaped webbing, which may be retracted by a core shaft of a seat belt retractor and fixed to the vehicle by a locking tongue. The vehicle safety belt may be an important component of a vehicle passive safety system. The vehicle may be, for example, a passenger car, a truck or other means of transportation.

[0003] With the development of vehicle technology, users have higher and higher requirements for vehicle comfort, and the same is true for the comfort of vehicle seats. In the development of vehicle seats, the inclination angle of seat backs has evolved from fixed to adjustable, and the adjustable angle is getting larger and larger. In some commercial vehicles, the seat backs have even been adjusted to an angle close to lying flat.

[0004] Some known seat belt retractors are equipped with a vehicle sensing device, which can be used as a mechanical sensor in the seat belt retractor to sense the vehicle state, such as the acceleration and tilt angle of the vehicle. When an emergency occurs in the vehicle, the vehicle sensing device can sense the emergency state and cause the spindle of the seat belt retractor to lock, preventing the webbing from being further withdrawn from the spindle, so that the occupant can be well restrained by the webbing and thus obtain good safety protection. Typically, the earlier vehicle sensing device is fixedly mounted on the vehicle body or the vehicle seat, which may not meet the technical requirements of an adjustable seat back.

[0005] In addition, there is known an adaptive vehicle sensing device, which can be adjusted together with the seat back by its own gravity. Since the adaptive vehicle sensing device is active, its adaptive angle adjustment range is limited, and the vehicle sensing sensitivity still has room for improvement. For the vehicle sensing device and the locking device, for example, reference can be made to the applicant's patent application CN110027502A.

[0006] In addition, patent document CN102991452B discloses an angle adjustment disk assembly for a vehicle sensing device, which has an angle adjustment disk having a long diameter portion and a short diameter portion, and a plane portion is formed at the connection between the long diameter portion and the short diameter portion, and the plane portion is used to install a core wire tightening mechanism, and the core wire end is fixed to the short diameter portion and extends to the long diameter portion through the plane portion, wherein the core wire can be wound along the outer edge of the long diameter portion. During the assembly process of the core wire, the core wire needs to be bypassed around the long diameter portion of the angle adjustment disk, cut into the long diameter portion of the angle adjustment housing, and then led out. During the assembly process of the core wire, the core wire is always in a tight fit, which makes the assembly of the core wire more difficult. The layout of the entire angle adjustment disk is not compact enough, and the external dimensions are large, which is not convenient for customers to install and match. Summary of the invention

[0007] The object of the present invention is to provide an angle adjustment plate assembly for a seat belt retractor, which has a compact structure, a small number of parts and is easy to install.

[0008] According to a first aspect of the present invention, a cam assembly for a seat belt retractor is proposed, which is configured to adjust the positioning angle of a vehicle sensing device of the seat belt retractor, and comprises:

[0009] a housing having a wire lead-in, the housing being configured for pivotal transmission connection with a backrest of a vehicle seat; and

[0010] An angle adjustment disk is received in the housing, the angle adjustment disk can rotate relative to the housing, and the angle adjustment disk has a core wire fixing portion, the core wire fixing portion is configured to fix the end of the core wire introduced into the housing;

[0011] Wherein, the angle adjustment disk has a long diameter portion with a longer rotation radius and a short diameter portion with a shorter rotation radius, the short diameter portion has a core wire winding portion, and the core wire winding portion extends from the core wire fixing portion in a first rotation direction, wherein, when the shell rotates relative to the angle adjustment disk in the first rotation direction, the core wire can be wound on the core wire winding portion, wherein the first rotation direction corresponds to the backrest backward tilt angle adjustment direction, the shell includes a shell component, the shell component has a long diameter portion with a longer rotation radius and a short diameter portion with a shorter rotation radius, the short diameter portion of the shell component acts together with the long diameter portion of the angle adjustment disk to limit the rotation angle range of the shell relative to the angle adjustment disk, the short diameter portion of the angle adjustment disk is opposite to the short diameter portion of the shell component, and the short diameter portion of the angle adjustment disk is radially spaced apart from the long diameter portion of the shell component.

[0012] This angle adjustment plate assembly has a compact structure, a small number of parts, and is easy to manufacture and install. On the one hand, it can make the positioning angle of the vehicle sensing device adapt to the seat back tilt adjustment, and on the other hand, it can maintain the vehicle sensing sensitivity of the vehicle sensing device, thus combining the advantages of a fixedly installed vehicle sensing device and an adaptive vehicle sensing device.

[0013] In some embodiments, the housing may be configured for fixed connection coaxially with a pivot axis of a backrest of a vehicle seat.

[0014] In some embodiments, the housing may include a box-shaped housing component and a cover plate, the housing component has a mounting shaft, and the angle adjustment disk is rotatably mounted on the mounting shaft.

[0015] In some embodiments, the rotation angle range is greater than 45°, in particular greater than 60°, for example greater than 90°.

[0016] In some embodiments, the core wire introduction portion may be configured such that the core wire is introduced into the angle adjustment disk assembly in a direction tangential to the core wire winding portion.

[0017] In some embodiments, the core wire lead-in portion may be provided in a region of a short diameter portion of the housing component.

[0018] In some embodiments, the core wire fixing portion may be disposed in a region of the long diameter portion of the angle adjustment disk adjacent to a front end surface viewed along the first rotation direction.

[0019] In some embodiments, the recliner assembly may include a wrench. The wrench may be configured to be mounted without relative rotation relative to a seat portion of a vehicle seat. The wrench may limit the rotation of the recliner.

[0020] In some embodiments, the angle adjustment plate assembly may include a wrench slider, the wrench slider being configured to be fixedly mounted relative to a seat portion of a vehicle seat, the wrench and the wrench slider being movable relative to each other.

[0021] In some embodiments, the wrench may be fixedly connected to the angle adjustment disk.

[0022] In some embodiments, the long diameter portion of the angle adjustment disk may have a slide groove, and the wrench may have a stopper, which extends into the slide groove, and the stopper can move between two ends of the slide groove relative to the angle adjustment disk.

[0023] In some embodiments, the slide groove may be an arc groove concentric with the rotation axis of the angle adjustment disk.

[0024] In some embodiments, the short-diameter portion of the angle adjustment disk may have a circumferential groove, and the circumferential groove may constitute the core wire winding portion.

[0025] In some embodiments, the circumferential groove may be an arc groove that is concentric with the rotation axis of the angle adjustment disk.

[0026] In some embodiments, the angle adjustment plate, the wrench, and the cover plate may be mounted to the housing component in sequence.

[0027] According to a second aspect of the present invention, a seat belt retractor is proposed, which includes a retractor body configured to be installed on a backrest of a vehicle seat and a rotatable vehicle sensing device integrated in the retractor body, the seat belt retractor also includes an angle adjustment disk assembly according to the first aspect of the present invention, and the angle adjustment disk assembly is coupled to the vehicle sensing device via a core wire.

[0028] The aforementioned technical features and the technical features to be mentioned later and the technical features shown in the drawings can be combined with each other arbitrarily, as long as they are not contradictory. All technically feasible feature combinations are technical contents recorded in the specification of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be described in more detail below with reference to the accompanying drawings using embodiments.

[0030] Figure 1 is a schematic side view of a vehicle seat with a seat belt retractor.

[0031] Figure 2 yes Figure 1 Schematic diagram of a seat belt retractor.

[0032] Figure 3 yes Figure 2 Exploded view of the seat belt retractor.

[0033] Figure 4 This is an exploded view of the angle adjustment plate assembly.

[0034] Figure 5 It is a perspective view of the angle adjustment plate of the angle adjustment plate assembly.

[0035] Figure 6 It is a perspective view of the shell component of the angle adjustment plate assembly.

[0036] Figure 7 It is a schematic diagram of the angle adjustment disk assembly and the core wire assembly in a working state. DETAILED DESCRIPTION

[0037] Figure 1 A side view of a vehicle seat with a seat belt retractor is shown schematically. Figure 2 yes Figure 1Schematic diagram of an enlarged view of a seat belt retractor, wherein the vehicle seat is hidden. The vehicle can be, for example, a passenger car or a truck, in particular a partially autonomous or fully autonomous motor vehicle. The vehicle seat has a seat part 5 and a backrest 4, which can be adjusted from a predetermined position. Figure 1 The inclination angle can be adjusted forward and backward from the substantially upright initial position depicted by the solid line in the figure. The initial position can be optimized for the occupant to sit and operate the vehicle. The backrest 4 can be folded forward on the seat 5 to make room. The backrest 4 can be adjusted backward to a maximum inclination position close to horizontal, at which the occupant can rest. With reference to the forward direction of the vehicle, the maximum inclination position can correspond to an inclination angle close to 180°, for example, an inclination angle of approximately 170°. The backrest 4 can be adjusted to any intermediate position between the predetermined initial position and the maximum inclination position according to the needs of the user, for example, it can be adjusted to an inclination angle of approximately 120° or 135°. The two end positions of the backrest 4 are Figure 1 Described by dotted lines.

[0038] The retractor body 1 is fixedly mounted in the backrest 4. The retractor body 1 has an integrated rotatable vehicle sensing device 10 (see Figure 2 and Figure 3 ). An angle adjustment disk assembly 3 can be coaxially mounted on the pivot of the backrest 4, and the angle adjustment disk assembly is coupled to the vehicle sensing device 10 via the core wire assembly 2. At the predetermined initial position of the backrest 4, the vehicle sensing device 10 is in a substantially vertical orientation. In the case where the vehicle sensing device is fixed relative to the backrest, when the backrest is adjusted backwards by a certain angle from the initial position, the vehicle sensing device deviates from the vertical orientation accordingly by this angle. In the case of an adaptive vehicle sensing device, when the backrest is adjusted backwards by a certain angle from the initial position, the vehicle sensing device adaptively rotates by its own gravity and remains in the vertical orientation, however, the active vehicle sensing device has room for improvement in terms of sensitivity, and the angle range of adaptive adjustment typically does not exceed 45°. In the seat belt retractor of the present invention, when the backrest 4 is adjusted backward from the initial position to a certain angle, on the one hand, this causes the vehicle sensing device 10 to deviate from the vertical orientation at this angle accordingly, and on the other hand, it simultaneously causes the angle adjustment disk assembly 3 to pull the core wire assembly 2 and ultimately causes the vehicle sensing device 10 to rotate in the opposite direction at another angle, and the other angle can at least partially compensate for the aforementioned angle, and it is particularly preferred to basically completely compensate for the aforementioned angle and thereby allow the vehicle sensing device 10 to basically remain in the vertical orientation. Since the mobility of the vehicle sensing device 10 is constrained by the angle adjustment disk assembly 3 and the core wire assembly 2, the vehicle sensing sensitivity can even be compared with that of a fixedly mounted vehicle sensing device. At the same time, the vehicle sensing device can be compared with an adaptive vehicle sensing device in terms of positioning angle. In other words, the vehicle sensing device according to the present invention can have both the advantages of a fixedly mounted vehicle sensing device and the advantages of an adaptive vehicle sensing device.

[0039] like Figure 2 and Figure 3 As shown, the retractor body 1 may include a frame 17. Typically, the frame 17 may be configured as a U-shaped frame. The mandrel 26 for winding the webbing is rotatably supported in the frame 17, and may be equipped with a coil spring for pre-tightening the mandrel in the winding direction and a coil spring side cover for covering the coil spring at one axial end, and the coil spring side cover may be fixed to the frame 17. The coil spring and the coil spring side cover may constitute a coil spring assembly 22. The mandrel 26 may drive 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 mechanical inner cover 18, and the vehicle sensing device 10 may be installed in the mechanical inner cover. The mechanical inner cover 18 may in turn be received in the mechanical outer cover 23. The mechanical inner cover 18 and the mechanical outer cover 23 may be fixed to the frame 17 together. When the vehicle is in an emergency, such as a collision or rollover, the vehicle sensing device 10 can lock the ratchet 21, thereby causing the locking pawl guided by the ratchet to engage with the frame 17 as in Figure 3 In the gear ring visible in the figure, the core shaft 26 is locked. Regarding the vehicle sensing device 10 and the locking device, for example, reference can be made to the patent application CN110027502A of the applicant. The vehicle sensing device 10 may include a rotatably supported sensitive seat 14, and the sensitive seat may have a concave bowl surface. The sensitive ball 25 can move in the sensitive seat. In a stationary state, the sensitive ball is at the bottom of the bowl surface. When an emergency occurs in the vehicle, the sensitive ball 25 leaves the bottom of the bowl surface under the action of inertia force, lifts the sensitive claw 15, and the sensitive claw in turn lifts the locking claw 8, so that the locking claw 8 engages with the ratchet 21, thereby causing the core shaft 26 to be locked.

[0040] Reference below Figures 4 to 7 The angle adjustment disk assembly 3 and the core wire assembly 2 and the transmission box assembly 9 associated therewith are described in more detail. Figure 4 1 is an exploded view of the angle adjustment disk assembly 3 , wherein a section of the core wire assembly 2 associated with the angle adjustment disk assembly 3 is additionally described. Figure 5 It is a perspective view of the angle adjustment disk 31 of the angle adjustment disk assembly 3. Figure 6 3 is a perspective view of the housing component 13 of the angle adjustment plate assembly 3. Figure 7 1 is a schematic diagram of the angle adjustment disk assembly 3 together with the core wire assembly 2 in a working state, wherein a section of the core wire assembly 2 associated with the angle adjustment disk assembly 3 is additionally described, and the sheath of the core wire 28 is omitted.

[0041] The angle adjustment plate assembly 3 is configured to automatically adjust the positioning angle of the vehicle sensing device 10 when the seat back is adjusted inclination, ideally so that the vehicle sensing device 10 can be basically maintained in a vertical orientation. It is also possible that the angle adjustment plate assembly 3 can only partially compensate for the angular deviation of the vehicle sensing device 10 from the vertical direction caused by the seat back adjustment inclination. For example, when the seat back is tilted backward from an upright position by 20° or adjusted to an inclination of approximately 110° relative to the vehicle's forward direction, the angle adjustment plate assembly 3 can only compensate for half of the 20° angular deviation of the vehicle sensing device 10 from the vertical direction, so that the vehicle sensing device 10 still has an angular deviation of 10° from the vertical direction. This still improves the vehicle sensing function compared to the case where the vehicle sensing device 10 is fixedly mounted and thus has a 20° angular deviation.

[0042] The angle adjustment plate assembly 3 includes a housing. Specifically, the housing may include a box-shaped housing component 13 and a cover plate 11, wherein the cover plate 11 may be fixedly mounted to the backrest 4, and the housing component 13 may be fixedly connected to the cover plate 11. The housing is configured to be connected to the pivot of the backrest 4. Advantageously, the housing may be configured to be fixedly connected coaxially with the pivot of the backrest 4. Therefore, when the backrest 4 rotates around the pivot to adjust the inclination angle, the housing rotates synchronously with the backrest. This may be particularly simple in structure. However, it is also possible, for example, that the housing is connected to the pivot of the backrest 4 by means of a transmission mechanism, for example, it may be connected to the pivot of the backrest 4 by means of a planetary gear mechanism, wherein the sun gear may be fixed, for example, fixed to the seat 5, one of the planet carrier and the ring gear may be fixedly connected to the pivot of the backrest 4, and the other of the planet carrier and the ring gear may be connected to the housing component 13. The housing component 13 may have a core wire introduction portion 46, and the core wire 28 of the core wire assembly 2 may be introduced into the housing from the core wire introduction portion 46 and fixed with the end 29 to the core wire fixing portion 58 of the angle adjustment disk 31 which will be further described below. For example, the fixing is performed by means of a screw 32. The housing component 13 may have a long diameter portion 41 with a longer rotation radius and a short diameter portion 42 with a shorter rotation radius. The housing may rotate in a first rotation direction D1 and in a second rotation direction D2 opposite to the first rotation direction, wherein the first rotation direction D1 corresponds to the rearward adjustment direction of the backrest inclination, and the second rotation direction D2 corresponds to the forward adjustment direction of the backrest inclination.

[0043] The angle adjustment disk assembly 3 may include an angle adjustment disk 31, which is received in a shell and can rotate relative to the shell. To this end, the shell component 13 may have a mounting shaft 47, and the angle adjustment disk 31 is rotatably mounted on the mounting shaft 47. The angle adjustment disk 31 may have a long diameter portion 51 with a longer rotation radius and a short diameter portion 52 with a shorter rotation radius. The long diameter portion 51 may have a core wire fixing portion 58. The short diameter portion 52 may have a core wire winding portion 59. Advantageously, the core wire winding portion 59 may be configured as a circumferential groove on the periphery of the short diameter portion 52, and preferably the depth and width of the circumferential groove are not less than the diameter of the core wire 28.

[0044] With reference to the first rotation direction D1, the short diameter portion 42 of the housing component 13 has a front end face 43 and a rear end face 44, and the long diameter portion 51 of the angle adjustment disk 31 has a front end face 53 and a rear end face 54. The front end face 53 and the rear end face 54 can be configured as a plane, such as a plane extending substantially radially, or can be configured as a transitional curved surface from the long diameter portion 51 to the short diameter portion 52. The core wire fixing portion 58 can be arranged in the area adjacent to the front end face 53 of the long diameter portion 51. The core wire winding portion 59 can extend from the end adjacent to the front end face 53 of the long diameter portion 51 in the short diameter portion 52 toward the other end of the short diameter portion 52. The core wire winding portion 59 can occupy the entire circumference or part of the circumference of the outer edge of the short diameter portion 52, preferably occupying more than half of the circumference of the outer edge of the short diameter portion 52, such as more than 80%. Advantageously, the core wire 28 can be introduced into the angle adjustment disk assembly 3 in a direction tangential to the core wire winding portion 59 and fixed to the core wire fixing portion 58. The rotation angle range of the housing or housing component 13 relative to the angle adjustment disk 31 defines the effective adjustment range of the angle adjustment disk assembly, wherein the rear end face 44 of the short diameter portion 42 of the housing component 13 and the front end face 53 of the long diameter portion 51 of the angle adjustment disk 31 abut against each other to define one end point of the rotation angle range, and the front end face 43 of the short diameter portion 42 of the housing component 13 and the rear end face 54 of the long diameter portion 51 of the angle adjustment disk 31 abut against each other to define the other end point of the rotation angle range. The rotation angle range should at least cover the adjustment range of the seat back from the upright initial position to the maximum tilt position.

[0045] The angle adjustment disk assembly 3 may include a wrench 12, which is configured to be mounted without relative rotation relative to the seat 5, and the wrench can limit the rotation of the angle adjustment disk 13. It is particularly advantageous that the angle adjustment disk assembly may also include a wrench slider 7, which is configured to be fixedly mounted relative to the seat 5, and the wrench 12 and the wrench slider 7 can move relative to each other. Here, the combination of the wrench 12 and the wrench slider 7 can be adapted to different vehicle seats, wherein the wrench slider 7 can be simply fixed in the seat 5, and the wrench 12 can be appropriately moved relative to the wrench slider 7, which can compensate for the errors of the components and the possible position changes of the components when the backrest 4 adjusts the inclination angle. In an embodiment not shown, the angle adjustment disk 31 can be fixedly connected to the wrench 12. In an embodiment not shown, the wrench 12 and the wrench slider 7 can be replaced by an integrally constructed component. In the illustrated embodiment, the angle adjustment plate 31 may have a slide groove 55, and the wrench 12 may have a stopper 6, and the stopper 6 may extend into the slide groove 55, so that the angle adjustment plate 31 can rotate relative to the wrench 12 within the angle range defined by the slide groove 55. With reference to the first rotation direction, the slide groove has a front end 56 and a rear end 57. The function of the slide groove 55 will be described in more detail later.

[0046] In the simplest case, the core wire assembly 2 may only include the core wire 28. Advantageously, however, the core wire assembly 2 may additionally include a sheath 27. The end of the sheath 27 facing the angle adjustment disk assembly 3 may be fixed in the core wire introduction portion 46 of the shell. The core wire introduction portion 46 may lead to the short diameter portion 42 of the shell component 13, and the short diameter portion 42 may have a core wire inlet 45, through which the core wire 28 may pass to reach the interior of the shell and be tangentially led to the core wire winding portion 59. The other end 30 of the core wire 28 may be transmission-connected to the vehicle sensing device 10, so that the winding and unwinding of the core wire 28 on the angle adjustment disk 13 may manipulate the vehicle sensing device 10. More specifically, the end 30 of the core wire 28 may be transmission-connected to the movable sensitive seat 14 of the vehicle sensing device 10.

[0047] In the illustrated embodiment, the end 30 of the core wire 28 can be matched with the transmission box assembly 9. The transmission box assembly 9 can be installed in the mechanical cover 23. The transmission box assembly 9 can include a transmission housing, which includes two housing parts 16, 20. The transmission pulley 19 is rotatably supported in the transmission housing, more specifically, it can be supported on the central column of the first housing part 20. The end 30 of the core wire 28 can be fixed on the transmission pulley 19 and can be wound and unwound on the periphery of the transmission pulley. The transmission pulley 19 can have a push rod, which can manipulate the sensitive seat 14. For example, the push rod can have a ball head, and the sensitive seat can have a pair of arms extending from the body, and the ball head is received between the pair of arms. The winding of the core wire 28 on the angle adjustment disk 13 can shorten the effective length of the core wire 28, so that the end 30 of the core wire 28 can drive the transmission pulley 19, so that the push rod of the transmission pulley 19 can manipulate the sensitive seat 14. Ideally, the rotation of the sensitive seat 14 caused by the backrest tilt adjustment and the rotation caused by the core wire winding can offset each other, so that the orientation of the sensitive seat 14 can remain unchanged. Advantageously, the transmission box assembly 9 can also include a return spring 24, which preloads the core wire 28.

[0048] Figure 7 3 is a schematic diagram of the angle adjustment plate assembly 3 and the core wire assembly 2 in a working state, in which the backrest 4 of the vehicle seat has been adjusted backward by a certain angle from the substantially upright initial position, the shell component 13 has been rotated in the first rotation direction D1, and the core wire 28 has been wound around a section of the core wire winding portion 59. The stopper 6 is in contact with the rear end 54 of the slide groove 55, and the angle adjustment plate 31 is fixed by the wrench 12. The shell component 13 can be moved from the following positions: Figure 7 The position shown is further rotated along the first rotation direction D1 , in other words, the inclination angle of the backrest 4 of the vehicle seat can be further adjusted rearward, and at the same time, the core wire 28 can be further wound on the core wire winding portion 59 .

[0049] The above-mentioned motion process can also be described as follows based on the relativity of motion, taking the backrest 4 of the vehicle seat as a reference system. When the backrest of the vehicle seat is adjusted backward from the substantially upright initial position, the housing component 13 fixed to the backrest 4 is stationary, and the wrench 12 fixed to the seat 5 rotates in the second rotation direction D2. Since the stopper 6 of the wrench 12 is blocked against the end 57 of the slide slot 55, the wrench 12 drives the angle adjustment plate 31 to rotate together, so that the core wire 28 is wound onto the core wire winding portion 59. The transmission pulley 19 rotates accordingly, and the core wire 28 is unwound on the transmission pulley 19. The transmission pulley 19 pushes the vehicle sensing device 10 with the help of the push rod, so that the vehicle sensing device 10 rotates.

[0050] The following continues to describe other working processes of the angle adjustment plate assembly 3 with reference to the vehicle coordinate system.

[0051] If from Figure 7 Starting from the position shown, the backrest 4 of the vehicle seat returns to the upright initial position, then the shell component 13 rotates in the second rotation direction D2, and the angle adjustment disk 31 is kept pressed against the stopper 6 with the rear end 57 of the slide groove 55 when the core wire 28 is pre-tightened, and the core wire 28 is unwound from the core wire winding portion 59. When the shell component 13 continues to rotate along the second rotation direction D2 until the rear end face 44 of the short diameter portion 42 of the shell component 13 contacts the front end face 53 of the long diameter portion of the angle adjustment disk 31, the angle adjustment disk 31 moves together with the shell component 13, wherein the presence of the slide groove 55 allows the angle adjustment disk 31 to move together with the shell component 13, and they can move together until the front end 56 of the slide groove 55 reaches the stopper 6. The movement of the angle adjustment disk 31 and the shell component 13 together can correspond to the forward folding process of the backrest 4 of the vehicle seat, wherein the angle adjustment of the vehicle sensing device 10 by means of the angle adjustment disk assembly 3 is not required.

[0052] When the backrest 4 of the vehicle seat returns to the upright initial position from the position of being folded forward on the seat 5, the shell part 13 rotates in the first rotation direction D1, and the angle adjustment disk 31 is pulled by the pre-tightened core wire 28 and thus rotates together with the shell part 13 in the first rotation direction D1, until the rear end 57 of the slide 55 reaches the stopper 6 and the angle adjustment disk 31 is fixed by the wrench 12 and the wrench slider 7. Then, when the shell part 13 continues to rotate in the first rotation direction D1, the core wire 28 is wound on the core wire winding portion 59 and thus performs the angle adjustment function. If the backrest 4 of the vehicle seat involved does not have the function of being folded forward, but only has the function of adjusting the inclination backward, then the slide 55 can be eliminated, and the wrench 12 and the angle adjustment disk 31 can be directly fixedly connected.

[0053] In the design scheme of the present disclosure, it is possible in some embodiments that during the assembly process of the core wire, the core wire can bypass the short diameter portion of the angle adjustment disk, cut into the short diameter portion of the shell component of the angle adjustment assembly, and then lead out. Since the short diameter portion of the shell component can be relatively short, structural cavities can exist on both sides of the core wire during the assembly process, so that the core wire can be easily led out from the short diameter portion of the shell component. The entire angle adjustment disk layout can be compact and the overall dimensions can be small, which can facilitate customer installation and matching.

[0054] It should be noted that the terms used herein are for the purpose of illustrating specific aspects only and are not intended to limit the disclosure. As used herein, the singular forms "a" and "the one" shall include the plural forms unless the context clearly states otherwise. It is understood that the terms "include" and "comprises" and other similar terms, when used in the application documents, specify the existence of the stated operations, elements and / or parts, without excluding the existence or addition of one or more other operations, elements, parts and / or combinations thereof. As used herein, the term "and / or" includes all arbitrary combinations of one or more related enumerated items. In the description of the drawings, similar reference numerals always represent similar elements.

[0055] The thickness of the elements in the accompanying drawings can be exaggerated for the sake of clarity. It is also understood that if an element is referred to as being on another element, coupled to another element or connected to another element, then the element can be directly formed on the other element, coupled to it or connected to it, or one or more intervening elements can be arranged between them. On the contrary, if the expressions "directly on...", "directly coupled to..." and "directly connected to..." are used herein, then there is no intervening element. Other words used to illustrate the relationship between elements should be similarly interpreted, such as "between..." and "directly between...", "attachment" and "direct attachment", "adjacent" and "directly adjacent", etc.

[0056] Terms such as "top," "bottom," "above," "below," "above," "below," etc. are used herein to describe the relationship of one element, layer or region to another element, layer or region as illustrated in the drawings. It will be understood that these terms are intended to encompass other orientations of the device in addition to the orientation depicted in the drawings.

[0057] It is to be understood that although the terms "first", "second", etc. may be used herein to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. Therefore, the first element may be referred to as the second element without departing from the teachings of the present invention.

[0058] It is also contemplated that all exemplary embodiments disclosed herein may be arbitrarily combined with one another. Finally, it should be noted that the above embodiments are only used to understand the present invention and do not limit the scope of protection of the present invention. For those skilled in the art, modifications may be made based on the above embodiments, and these modifications do not depart from the scope of protection of the present invention.

Claims

1. An angle adjustment plate assembly for a seat belt retractor, configured to adjust the positioning angle of a vehicle sensing device (10) of the seat belt retractor, comprising: A housing having a wire lead-in portion (46) and configured for pivot drive connection with a backrest (4) of a vehicle seat; and An angle adjustment disk (31) is received in a housing and is rotatable relative to the housing. The angle adjustment disk has a core wire fixing portion (58) configured to fix an end portion (29) of a core wire (28) introduced into the housing. It is characterized in that The angle adjustment disk has a long diameter portion (51) with a longer rotation radius and a short diameter portion (52) with a shorter rotation radius, the short diameter portion having a core wire winding portion (59), the core wire winding portion extending from the core wire fixing portion in a first rotation direction (D1), wherein when the shell rotates relative to the angle adjustment disk in the first rotation direction, the core wire can be wound on the core wire winding portion, wherein the first rotation direction corresponds to the backrest backward tilt angle adjustment direction, the shell includes a shell component, the shell component has a long diameter portion with a longer rotation radius and a short diameter portion with a shorter rotation radius, the short diameter portion of the shell component cooperates with the long diameter portion of the angle adjustment disk to limit the rotation angle range of the shell relative to the angle adjustment disk, the short diameter portion of the angle adjustment disk is opposite to the short diameter portion of the shell component, and the short diameter portion of the angle adjustment disk is radially spaced apart from the long diameter portion of the shell component.

2. The angle adjustment plate assembly for a seat belt retractor according to claim 1, characterized in that: The housing is designed for fixed coaxial connection to a pivot axis of a backrest of a vehicle seat.

3. The angle adjustment disc assembly for a seat belt retractor according to claim 1 or 2, characterized in that: The housing comprises a box-shaped housing component (13) and a cover plate (11); the housing component has a mounting shaft (47), and the angle adjustment disk is rotatably mounted on the mounting shaft.

4. The angle adjustment disc assembly for a seat belt retractor according to claim 1 or 2, characterized in that: The core wire introduction portion is configured such that the core wire is introduced into the angle adjustment disk assembly in a direction tangential to the core wire winding portion.

5. The angle adjustment plate assembly for a seat belt retractor according to claim 3, characterized in that: The wire lead-in portion is arranged in the region of the short-diameter portion of the housing component.

6. The angle adjustment plate assembly for a seat belt retractor according to claim 1 or 2, characterized in that: The core wire fixing portion is provided in a region of the long diameter portion of the angle adjustment disk adjacent to a front end surface viewed along the first rotation direction.

7. The angle adjustment plate assembly for a seat belt retractor according to claim 1 or 2, characterized in that: The angle adjustment disk assembly comprises a wrench (12), which is configured to be mounted without relative rotation relative to a seat portion (5) of a vehicle seat, and the wrench limits the rotation of the angle adjustment disk.

8. The angle adjustment plate assembly for a seat belt retractor according to claim 7, characterized in that: The angle adjustment disk assembly comprises a wrench slider (7), which is configured to be fixedly mounted relative to a seat portion of a vehicle seat, and the wrench and the wrench slider are movable relative to each other.

9. The angle adjustment plate assembly for a seat belt retractor according to claim 7, characterized in that: The long diameter portion of the angle adjustment disk has a slide groove (55), and the wrench has a stopper (6), which extends into the slide groove and can move between two ends of the slide groove relative to the angle adjustment disk.

10. The angle adjustment disc assembly for a seat belt retractor according to claim 1 or 2, characterized in that: The short diameter portion of the angle adjustment disk has a circumferential groove, and the circumferential groove constitutes the core wire winding portion.

11. The angle adjustment plate assembly for a seat belt retractor according to claim 10, characterized in that: The circumferential groove is an arc groove which is concentric with the rotation axis of the angle adjustment disk.

12. The angle adjustment plate assembly for a seat belt retractor according to claim 3, characterized in that: The reclining plate assembly includes a wrench configured to be mounted without relative rotation relative to a seat portion of a vehicle seat, and the reclining plate, the wrench and the cover plate are sequentially mounted to a housing component.

13. A seat belt retractor comprising a retractor body configured to be mounted to a backrest of a vehicle seat and a rotatable vehicle sensing device integrated in the retractor body, characterized in that: The seat belt retractor further comprises an angle adjustment disc assembly for the seat belt retractor according to any one of claims 1 to 12, wherein the angle adjustment disc assembly is coupled to a vehicle sensing device via a core wire.

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