Compensation system for a seat belt retractor and vehicle seat

Abstract

The present application relates to a compensation system for a seat belt retractor, which is adapted to a vehicle seat having a base (103), a seat cushion (102) and a backrest (101), the backrest being rotatably connected with the seat cushion about a first rotation axis (104), the seat cushion and the backrest being jointly rotatably connected with the base about a second rotation axis (105), the seat belt retractor integrating a rotatable vehicle sensing device. The compensation system comprises first and second compensation devices. The first compensation device performs angular compensation and constraint of the vehicle sensing device when the backrest is rotated relative to the seat cushion about the first rotation axis, the first compensation device (100) comprising a swivel head. The second compensation device (200) is configured to fix the swivel head when the backrest is rotated relative to the seat cushion about the first rotation axis, and to cause the swivel head to rotate inversely relative to the seat cushion about the first rotation axis when the seat cushion and the backrest are jointly rotated relative to the base about the second rotation axis. The present application also relates to a vehicle seat comprising the compensation system.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more specifically to a compensation system for a seat belt retractor for a vehicle seat, for angle compensation and constraint of a vehicle sensing device, and a vehicle seat, particularly a zero-gravity seat, including such a compensation system. Background Technology

[0002] In practice, some vehicle seats are known to be configured as zero-gravity seats, which include a seat cushion and a backrest, wherein the tilt angle of the seat cushion and the tilt angle of the backrest are adjustable.

[0003] In the field of vehicle safety technology, vehicle seat belts are safety devices used to protect occupants in emergency situations such as emergency braking, collisions, or rollovers. They consist of webbing that restrains occupants and can be retracted using a seat belt retractor. Vehicle seat belts are an important component of a vehicle's passive safety system. With the development of vehicle technology, users have increasingly higher demands for vehicle comfort, including the comfort of vehicle seats.

[0004] Some known seatbelt retractors are equipped with vehicle-sensing devices, which act as mechanical sensors within the retractor to detect vehicle status, such as acceleration and tilt angle. In the event of an emergency, the vehicle-sensing device detects this and can cause the retractor's spindle to lock, preventing the webbing from pulling out further and ensuring the occupant is properly restrained and protected. In zero-gravity seats, where the seatback angle can be adjusted over a wide range, maintaining the vehicle-sensing function of the device while adjusting the backrest angle presents a challenge.

[0005] Typically, earlier vehicle sensing devices were fixedly installed in the vehicle seat, which may not have met the technical requirement of adjustable seat back angle, because the orientation of the vehicle sensing device would change accordingly as the seat back angle changed.

[0006] Furthermore, it is known that adaptive vehicle sensing devices can adaptively adjust their orientation based on their own weight and the adjustment of the seat back angle, ensuring that the vehicle sensing device always maintains a vertical orientation. However, since adaptive vehicle sensing devices are movable, their adaptive angle adjustment range is limited, and there is still room for improvement in vehicle sensing sensitivity. Summary of the Invention

[0007] The purpose of this application is to provide a compensation system for a seatbelt retractor and a vehicle seat including the compensation system, wherein the vehicle feel device functionality can be maintained when the seat cushion and / or backrest angle of the vehicle seat is adjusted by the compensation system.

[0008] A first aspect of the invention relates to a compensation system for a seatbelt retractor, the compensation system being adapted to a vehicle seat having a base, a seat cushion, and a backrest, the backrest being rotatably connected to the seat cushion about a first axis of rotation, the seat cushion and the backrest being rotatably connected to the base about a second axis of rotation spaced apart from the first axis of rotation, the backrest being provided with a seatbelt retractor, the seatbelt retractor integrating a rotatable vehicle sensing device; the compensation system includes a first compensation device configured to adjust the rearward tilt of the backrest relative to the seat cushion as the backrest rotates about the first axis of rotation. When the angle is adjusted, the vehicle sensing device is angle-compensated and constrained. The first compensation device includes an adjustment disc rotatable about a first axis relative to the backrest. The compensation system includes a second compensation device configured to fix the adjustment disc when the backrest rotates about the first axis relative to the seat cushion to adjust the rearward tilt angle of the backrest, and to cause the adjustment disc to rotate in the opposite direction relative to the seat cushion about the first axis when the seat cushion and the backrest rotate together about a second axis relative to the base to adjust the rearward tilt angle of the backrest and the seat cushion. Thus, the first compensation device compensates and constrains the vehicle sensing device.

[0009] A second aspect of the invention relates to a vehicle seat, particularly a zero-gravity seat, the vehicle seat having a base, a seat cushion, and a backrest, the backrest being rotatably connected to the seat cushion about a first pivot, the seat cushion and the backrest being rotatably connected to the base about a second pivot spaced apart from the first pivot, the backrest being provided with a seatbelt retractor, the seatbelt retractor integrating a rotatable vehicle sensing device, wherein the vehicle seat further includes a compensation system for the seatbelt retractor according to any embodiment of the invention.

[0010] With the compensation system according to the invention, whether the tilt angle is adjusted individually for the backrest of the vehicle seat or when the tilt angle is adjusted together for the seat cushion and backrest of the vehicle seat, the vehicle sensing device for the seat belt retractor installed in the backrest can have a substantially unchanged vertical orientation or the deviation from the vertical orientation is reduced to an acceptable range. At the same time, the vehicle sensing device can be well constrained by the compensation system, so the vehicle sensing device can maintain good functionality.

[0011] In some implementations, the first rotating shaft may be located behind the second rotating shaft.

[0012] In some implementations, the first rotating shaft may be located behind and above the second rotating shaft.

[0013] In some embodiments, the first and second rotating shafts may be parallel to each other.

[0014] In some embodiments, the second compensation device may include a first element resisting rotation relative to the base and a second element resisting rotation relative to the angle adjustment disc, as well as a cable element, the cable element having its first end section wound around a first winding wheel of the first element, and the cable element having its opposite second end section wound around a second winding wheel of the second element.

[0015] In some embodiments, the first winding wheel may be coaxial with the second shaft, and the second winding wheel may be coaxial with the first shaft.

[0016] In some embodiments, the first element may include a first wrench fixed to a first winding reel, the first wrench being configured to be fixedly connected to the base of a vehicle seat, and the second element may include a second wrench fixed to a second winding reel, the second wrench being configured to be fixedly connected to a wrench of an adjustment disc.

[0017] In some embodiments, the second compensation device may further include a housing that receives the second element and is fixedly connected to the seat cushion.

[0018] In some embodiments, the housing may have a cable guide channel that extends tangentially to the second winding reel.

[0019] In some embodiments, the first and second winding reels may have the same diameter.

[0020] In some embodiments, the first element may have a groove for receiving a first end of a cable element, and the first element is provided with a tightening screw that is mounted to the first element and can be screwed on, the tightening screw being able to manipulate the first end of the cable element and thus determine the position of the first end of the cable element in the groove.

[0021] As an alternative or supplement, the second element may have a groove for receiving the second end of the cable, and the second element is provided with a tightening screw that is mounted to the second element and can be screwed on, the tightening screw being able to manipulate the second end of the cable and thus determine the position of the second end of the cable in the groove.

[0022] In some embodiments, the second compensation device may include a linkage rotatably connected to the base of the vehicle seat and rotatably connected to an adjustment disc, wherein the linkage is configured to fix the adjustment disc when the backrest rotates relative to the seat cushion about a first axis to adjust the rearward tilt angle of the backrest, and to cause the adjustment disc to rotate in the opposite direction relative to the seat cushion about the first axis when the seat cushion and backrest rotate together about a second axis relative to the base to adjust the rearward tilt angle of the seat cushion and backrest, thereby the first compensation device angularly compensating for and constraining the vehicle sensing device.

[0023] In some embodiments, the base, the connecting rod, the adjusting plate, and the seat cushion can form a four-bar linkage.

[0024] In some embodiments, the four-bar linkage may be a parallelogram mechanism.

[0025] In some embodiments, the four-bar linkage is an approximate parallelogram mechanism, wherein when the seat cushion and backrest rotate together about the second pivot relative to the base, the angle change of the adjustment disc is within 5°, for example within 3°, and optionally within 2°.

[0026] In some embodiments, the link can be rotatably connected to the wrench of the angle adjustment disc of the first compensation device in the region of its first end via a stepped bolt.

[0027] In some embodiments, the link may be rotatably connected to a mounting plate fixed to the base of the vehicle seat by additional bolts in the region of its second end opposite to the first end.

[0028] In some embodiments, the additional bolt can be screwed through the connecting rod into the welded nut of the fixing plate, and a spring element is fitted onto the additional bolt and disposed between the fixing plate and the connecting rod, pressing the connecting rod against the bolt head of the additional bolt, so that the connecting rod is rotatable about the unthreaded shank section of the additional bolt.

[0029] The technical features mentioned above, those to be mentioned below, and those shown individually in the accompanying drawings can be combined arbitrarily, provided that the combined technical features are not contradictory. All feasible combinations of features are the technical content explicitly described herein. Any one of the multiple sub-features contained in the same statement can be applied independently, without necessarily being applied together with other sub-features. Attached Figure Description

[0030] The invention will now be described in more detail with reference to the accompanying drawings and exemplary embodiments. Wherein:

[0031] Figure 1 This is a schematic perspective view of a vehicle seat according to a first embodiment of the present invention in its initial state.

[0032] Figure 2 yes Figure 1 An exploded view of the vehicle's seats.

[0033] Figure 3 yes Figure 1 An exploded view of a portion of the vehicle's seats.

[0034] Figure 4 yes Figure 1 A schematic perspective view of a vehicle seat in a tilted position.

[0035] Figure 5 yes Figure 1 A partially enlarged side view of the vehicle seats in their initial state.

[0036] Figure 6 yes Figure 1 A magnified side view of the vehicle seat in tilt adjustment mode.

[0037] Figure 7 This is an exploded view of the second compensation device according to the first embodiment of the present invention.

[0038] Figure 8 yes Figure 7 A cross-sectional view of the second compensation device in its assembled state.

[0039] Figure 9 This is a schematic diagram of a seatbelt retractor together with a first compensation device according to an embodiment of the present invention.

[0040] Figure 10 yes Figure 9 An exploded view of the seatbelt retractor together with the first compensation device.

[0041] Figure 11 yes Figure 9 An exploded view of the angle adjustment disk assembly of the first compensation device.

[0042] Figure 12 yes Figure 11 A perspective view of the angle adjustment disc assembly.

[0043] Figure 13 yes Figure 11 A perspective view of the housing component of the angle adjustment disc assembly.

[0044] Figure 14 yes Figure 11 A schematic diagram of the angle adjustment disk assembly together with the core wire assembly in one working state.

[0045] Figure 15 This is a schematic partial side view of a vehicle seat in its initial state according to a second embodiment of the present invention.

[0046] Figure 16 yes Figure 15 A schematic partial side view of a vehicle seat in a tilt adjustment state.

[0047] Figure 17 yes Figure 15 A partial exploded view of the vehicle seats in their initial state.

[0048] Figure 18 This is a partial cross-sectional view of the second compensation device according to the second embodiment in one end region of the connecting rod.

[0049] Figure 19 This is a partial cross-sectional view of the second compensation device according to the second embodiment in the region of the other end of the connecting rod. Detailed Implementation

[0050] First refer to Figures 1 to 4 This describes the general overview of a vehicle seat according to a first embodiment of the present invention. This vehicle seat can be adapted to motor vehicles, such as passenger cars or trucks, including partially autonomous or fully autonomous vehicles. Figures 1 to 4 The upholstery of the vehicle seat is omitted, and thus the skeleton of the backrest 101 and the skeleton of the seat cushion 102 are shown in these figures. The vehicle seat may include a base 103 to which the seat cushion 102, or more precisely, the skeleton of the seat cushion 102, can be mounted. The base 103 may be equipped with longitudinal and / or lateral rails, allowing the base 103, and thus the entire vehicle seat, to be adjustable in longitudinal and / or lateral position. Alternatively, the base 103 may be fixedly mounted in the motor vehicle. Typically, the seat cushion 102 may be connected to the base 103 via a linkage mechanism, such as a four-bar or five-bar linkage, such that the seat cushion 102 is adjustable at least in terms of tilt, and preferably additionally in terms of height. The vehicle seat may or may not be a zero-gravity seat.

[0051] In the first embodiment shown, the backrest 101 of the vehicle seat can be independently adjusted for tilt while the seat cushion 102 remains stationary, wherein the backrest 101 rotates forward or backward relative to the seat cushion 102 about a first pivot 104. The seat cushion 102 can rotate forward or backward relative to the base 103 together with the backrest 101 about a second pivot 105, so that the seat cushion 102 can adjust its tilt together with the backrest 101. The first pivot 104 and the second pivot 105 can be solid axes (e.g., the seat cushion and backrest can be hinged to each other via a circular tube) or virtual axes. The first pivot 104 and the second pivot 105 can be parallel to each other and spaced apart. Typically, the first pivot 104 is located above and behind the second pivot 105. A seatbelt retractor 106 can be installed in the backrest 101, which can integrate a vehicle sensing device 10 (see...). Figure 9 and Figure 10The seatbelt retractor 106 and the vehicle sensing device 10 will be described in more detail below. Ideally, at any rearward tilt angle of the vehicle seat, the vehicle sensing device 10 can remain at least substantially vertical and constrained, so that the vehicle sensing device optimally maintains its vehicle sensing function. For this purpose, the vehicle seat may be equipped with a compensation system, which may include a first compensation device 100 and a second compensation device 200 coupled together.

[0052] Figure 1 This is a schematic perspective view of the vehicle seat in its initial state, in which the backrest 101 is in an upright position, allowing the occupant seated in the vehicle seat to fully focus on the driving operation of the vehicle. Figure 4 This is a schematic perspective view of a vehicle seat in a tilted adjustment state, wherein the seat cushion 102 and backrest 101 of the vehicle seat rotate clockwise rearward about a second pivot 105 from their initial state (e.g., Figure 4 As indicated by arrow A in the diagram, the front end of the seat cushion 102 is lifted, and as the seat cushion 102 tilts, the backrest 101 tilts backward. This is as the vehicle seat moves from its initial state to... Figure 4 When adjusting the tilt angle as shown, and when adjusting from such a tilt angle state... Figure 4 When the tilt adjustment state shown returns to the initial state, the compensation system for the vehicle seat according to the first embodiment of the present invention is activated, so that the vehicle sensing device 10 optimally maintains the vehicle sensing function.

[0053] Figure 2 yes Figure 1 An exploded view of the vehicle's seats. Figure 3 yes Figure 1 A magnified, disassembled view of a vehicle seat. Figure 2 and Figure 3 The compensation system for the vehicle seat can be observed more clearly in the image, which includes a first compensation device 100 and a second compensation device 200, wherein the first compensation device 100 is described in part.

[0054] Now, for reference Figures 9 to 14 The seat belt retractor 106 and the first compensation device 100 of the associated compensation system used in the vehicle seat according to the first embodiment of the present invention will be described in more detail. Figure 9 This is a schematic diagram of the seat belt retractor 106 together with the first compensation device 100, viewed in the lateral direction of the vehicle seat. Figure 10 This is an exploded view of the seatbelt retractor 106 together with the first compensation device 100. Figure 11 This is an exploded view of the angle adjustment disk assembly 3 of the first compensation device 100.

[0055] The seatbelt retractor 106 includes a retractor body 1, which is fixedly mounted in the backrest 101. The retractor body 1 has an integrated rotatable vehicle sensing device 10. An adjustment disc assembly 3 can be coaxially mounted on a first pivot 104 of the backrest 101, the adjustment disc assembly 3 being coupled to the vehicle sensing device 10 via a core cable assembly 2. In a predetermined initial position of the backrest 101, the vehicle sensing device 10 is in a substantially vertical orientation.

[0056] In some seatbelt retractors with vehicle-sensing devices known in practice, the vehicle-sensing device is fixed relative to the backrest. When the backrest is adjusted backward from its initial position by a certain angle, the vehicle-sensing device deviates from its vertical orientation by that angle, thus adversely affecting its functionality or even causing it to malfunction completely.

[0057] In some seatbelt retractors with adaptive vehicle-sensing mechanisms known in practice, the vehicle-sensing mechanism adaptively rotates under its own weight and remains in a vertical orientation as the backrest is adjusted backward from its initial position. However, there is room for improvement in the sensitivity of active vehicle-sensing mechanisms, and the adaptive adjustment angle typically does not exceed 45°.

[0058] Compared to these prior art technologies, in the seatbelt retractor of the present invention, through a compensation system, when the backrest 101 is adjusted backward from its initial state by a certain angle, this causes the vehicle sensing device 10 to deviate from its vertical orientation by that angle accordingly. Simultaneously, it causes the adjustment disc assembly 3 to pull on the core cable assembly 2, ultimately causing the vehicle sensing device 10 to rotate in the opposite direction at another angle. This other angle can at least partially compensate for the aforementioned angle, and more preferably substantially completely compensate for it, thereby ensuring that the vehicle sensing device 10 remains substantially vertical at all times. Since the mobility of the vehicle sensing device 10 is constrained by the adjustment disc assembly 3 and the core cable assembly 2, the vehicle sensing sensitivity can even be compared to known fixed-mount vehicle sensing devices. At the same time, the vehicle sensing device 10 can be compared to known adaptive vehicle sensing devices in terms of positioning angle. In other words, the vehicle sensing device 10 according to the present invention combines the advantages of both fixed-mount vehicle sensing devices and adaptive vehicle sensing devices.

[0059] like Figure 9 and Figure 10As shown, the retractor body 1 may include a frame 17. Typically, the frame 17 may be configured as a U-shaped frame. A mandrel 26 for winding the webbing is rotatably supported in the frame 17 and may be equipped at one axial end with a coil spring for pre-tensioning the mandrel in the winding direction and a coil spring side cover covering the coil spring, which 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 a ratchet 21 at the other axial end. Here, the retractor body 1 may have an inner mechanical cover 18 and an outer mechanical cover 23. The ratchet 21 may be received in the inner mechanical cover 18, and the machine-feeling device 10 may be installed in the inner mechanical cover. The inner mechanical cover 18 may in turn be received in the outer mechanical cover 23. The inner mechanical cover 18 and the outer mechanical cover 23 may be jointly fixed to the frame 17. In the event of an emergency, such as a collision or rollover, the vehicle sensing device 10 can lock the ratchet 21, causing the ratchet-guided locking pawl to engage with the frame 17 as described above. Figure 10 The visible gear ring locks the spindle 26.

[0060] The vehicle sensing device 10 may include a rotatably supported sensing seat 14, which may have a concave cup-shaped surface. A sensing ball 25 is movable within the sensing seat. In a stationary state, the sensing ball 25 is located at the bottom of the cup-shaped surface. In the event of an emergency, the sensing ball 25, under the action of inertial force, moves away from the bottom of the cup-shaped surface, raising the sensing pawl 15. This sensing pawl then raises the locking pawl 8, causing the locking pawl 8 to engage with the ratchet 21, thereby locking the spindle 26.

[0061] The following is for reference. Figures 11 to 14 The angle adjustment disc assembly 3 and its associated core wire assembly 2 and transmission box assembly 9 are described in more detail. Figure 11 This is an exploded view of the angle adjustment disc assembly 3, in which a segment of the core wire assembly 2 associated with the angle adjustment disc assembly 3 is additionally described. Figure 12 This is a perspective view of the angle adjustment disc 31 of the angle adjustment disc assembly 3. Figure 13 This is a perspective view of the housing component 13 of the angle adjustment disc assembly 3.

[0062] Figure 14 This is a schematic diagram of the angle adjustment disk assembly 3 together with the core wire assembly 2 in one 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.

[0063] The adjustment disc assembly 3 is configured to automatically adjust the positioning angle of the vehicle sensing device 10 when the backrest 101 of the vehicle seat is tilted, ideally keeping the vehicle sensing device 10 substantially vertical. Alternatively, the adjustment disc assembly 3 may partially compensate for the angular deviation of the vehicle sensing device 10 from the vertical direction caused by the adjustment of the seat backrest. For example, when the seat backrest is tilted back by 20° from an upright position, the adjustment disc assembly 3 may only compensate for half of the 20° angular deviation of the vehicle sensing device 10 from the vertical direction, leaving the vehicle sensing device 10 with a 10° angular deviation from the vertical direction. This still improves the vehicle sensing function compared to the case where the vehicle sensing device 10 is fixedly installed and thus has a 20° angular deviation.

[0064] The angle adjustment disc assembly 3 may include a housing that can be fixedly mounted to the backrest 101. The housing may include a box-shaped housing component 13 and a cover plate 11. The housing component 13 may have a core wire introduction portion 46 from which the core wire 28 of the core wire assembly 2 can be introduced into the housing and fixed at its end 29 to the core wire fixing portion 58 of the angle adjustment disc 31. This fixing is achieved, for example, by means of a screw 32. The housing component 13 may have a long diameter portion 41 with a longer radius of rotation and a short diameter portion 42 with a shorter radius of rotation. The housing can rotate in a first rotation direction D1 and in a second rotation direction D2 opposite to the first rotation direction, where the first rotation direction D1 corresponds to the rearward adjustment direction of the backrest tilt angle, and the second rotation direction D2 corresponds to the forward adjustment direction of the backrest tilt angle.

[0065] The angle adjustment disc assembly 3 may include an angle adjustment disc 31, which is received in a housing and is rotatable relative to the housing. For this purpose, the housing component 13 may have a mounting shaft 47 on which the angle adjustment disc 31 is rotatably mounted. The angle adjustment disc 31 may have a long diameter portion 51 with a longer radius of rotation and a short diameter portion 52 with a shorter radius of rotation. 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, preferably with a depth and width not less than the diameter of the core wire 28.

[0066] Referring 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 adjusting 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 planes, such as planes extending generally radially, or as transitional curved surfaces from the long-diameter portion 51 to the short-diameter portion 52. The core wire fixing portion 58 can be provided in the region of the long-diameter portion 51 adjacent to the front end face 53. The core wire winding portion 59 can extend in the short-diameter portion 52 from the end adjacent to the front end face 53 of the long-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 more than half, for example more than 80%, of the circumference of the outer edge of the short-diameter portion 52. Advantageously, the core wire 28 can be introduced into the adjusting 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 relative to the adjustment disc 31 defines the effective adjustment range of the adjustment disc assembly. The abutment of the rear end face 44 of the short diameter portion 42 of the housing component 13 with the front end face 53 of the long diameter portion 51 of the adjustment disc 31 defines one end of the rotation angle range, while the abutment of the front end face 43 of the short diameter portion 42 of the housing component 13 with the rear end face 54 of the long diameter portion 51 of the adjustment disc 31 defines the other end of the rotation angle range. The rotation angle range must at least cover the adjustment range of the seat back from an upright initial position to a maximum tilt position.

[0067] The angle adjustment disc assembly 3 may include a wrench 12 configured to couple with a second compensation device 200 of the compensation system (described in more detail later), such that the angle adjustment disc 31 is coupled to the second compensation device 200. The wrench 12 may restrict rotation of the angle adjustment disc 13. In one embodiment, the wrench 12 may be a two-piece assembly including a wrench slider 7, which is movable relative to and fixed to the rest of the wrench 12 to adjust the appropriate length of the wrench 12. In another embodiment, the wrench 12 may be integrally formed and therefore have a fixed length. In an embodiment not shown, the angle adjustment disc 31 may be fixedly connected to the wrench 12. In the illustrated embodiment, the angle adjustment disc 31 may have a groove 55, and the wrench 12 may have a stop 6 that extends into the groove 55, thus allowing the angle adjustment disc 31 to rotate relative to the wrench 12 within an angular range defined by the groove 55. Referring to the first direction of rotation, the slide has a front end 56 and a rear end 57. The function of the slide 55 will be explained in more detail later.

[0068] In its simplest form, the core wire assembly 2 may consist only of the core wire 28. However, it is advantageous that the core wire assembly 2 may additionally include a sheath 27. The end of the sheath 27 facing the adjustment disc assembly 3 may be fixed in the core wire inlet 46 of the housing. This core wire inlet 46 may lead to the short diameter portion 42 of the housing component 13, and the short diameter portion 42 may have a core wire inlet 45 through which the core wire 28 can reach the interior of the housing and be tangentially led to the core wire winding portion 59. The other end 30 of the core wire 28 may be driveably connected to the vehicle sensing device 10, such that the winding and unwinding of the core wire 28 on the adjustment disc 13 can manipulate the vehicle sensing device 10. More specifically, the end 30 of the core wire 28 may be driveably connected to the movable sensing seat 14 of the vehicle sensing device 10.

[0069] In the illustrated embodiment, the end 30 of the core wire 28 can mate with the transmission housing assembly 9. The transmission housing assembly 9 can be mounted within the mechanical cover 23. The transmission housing assembly 9 can include a transmission housing comprising two housing components 16, 20. A transmission pulley 19 is rotatably supported within the transmission housing, and more specifically, can be supported on the central post of the first housing component 20. The end 30 of the core wire 28 can be fixed to the transmission pulley 19 and can be wound and unwound around the periphery of the transmission pulley. The transmission pulley 19 can have a push rod that can actuate 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, the ball head being received between these arms. The winding of the core wire 28 on the adjusting disc 13 can shorten the effective length of the core wire 28, thus allowing the end 30 of the core wire 28 to drive the transmission pulley 19, thereby allowing the push rod of the transmission pulley 19 to actuate the sensitive seat 14. Ideally, the rotation of the sensitive seat 14 caused by the backrest tilt adjustment and the rotation caused by the winding of the core wire can cancel each other out, so that the orientation of the sensitive seat 14 can remain unchanged. Advantageously, the transmission box assembly 9 may also include a return spring 24, which pretensions the core wire 28, and then pretensions the cable element 113 of the second compensation device 200, which will be described later.

[0070] Figure 14 This is a schematic diagram of the adjusting disc assembly 3 together with the core wire assembly 2 in one operating state. In this state, the seat cushion 102 of the vehicle seat remains stationary, while the backrest 101 of the vehicle seat has been adjusted backward by a certain angle from its substantially upright initial position. The housing component 13 has 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 stop block 6 abuts against the rear end 54 of the slide groove 55, and the adjusting disc 31 is fixed in place by means of the second compensation device 200 and the wrench 12. The housing component 13 can be opened from the rear end 54 of the slide groove 55. Figure 14The position shown continues to rotate along the first rotation direction D1. In other words, the backrest 101 of the vehicle seat can continue to adjust its tilt angle backward, while the core wire 28 can continue to be wound on the core wire winding section 59.

[0071] The aforementioned motion process can also be described with reference to the vehicle seat backrest 101, based on the relativity of motion, as follows. When the vehicle seat backrest is adjusted backward from its substantially upright initial position, the housing component 13 fixed to the backrest 101 remains stationary. The wrench 12, fixed to the seat cushion 102 via the second compensation device 200, rotates in the second rotation direction D2. Since the stop 6 of the wrench 12 rests against the end 57 of the slide groove 55, the wrench 12 drives the adjusting disc 31 to rotate together, causing the core wire 28 to be wound onto the core wire winding portion 59. The transmission pulley 19 rotates accordingly, and the core wire 28 unwinds onto the transmission pulley 19. The transmission pulley 19, through a push rod, pushes the vehicle sensing device 10, causing the vehicle sensing device 10 to rotate.

[0072] The following description continues with reference to the vehicle coordinate system to describe the other working processes of the angle adjustment disc assembly 3.

[0073] If from such Figure 14 Starting from the indicated position, as the vehicle seat backrest 101 returns to its initial upright position, the housing component 13 rotates in the second rotation direction D2. The adjusting disc 31, with the core wire 28 pre-tensioned, remains pressed against the stop block 6 by the rear end 57 of the groove 55, and the core wire 28 unwinds from the core wire winding portion 59. As the housing 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 housing component 13 contacts the front end face 53 of the long diameter portion of the adjusting disc 31, the adjusting disc 31 moves together with the housing component 13. The presence of the groove 55 allows the adjusting disc 31 to move together with the housing component 13 until the front end 56 of the groove 55 reaches the stop block 6. This joint movement of the adjusting disc 31 and the housing component 13 corresponds to the forward reclining process of the vehicle seat backrest 101, where the angle adjustment of the vehicle sensing device 10 by means of the adjusting disc assembly 3 is unnecessary.

[0074] When the vehicle seat backrest 101 returns from its forward-folding position on the seat cushion 102 to its initial upright position, the housing component 13 rotates in the first rotation direction D1. The adjustment disc 31 is pulled by the pre-tensioned core wire 28 and thus rotates together with the housing component 13 in the first rotation direction D1 until the rear end 57 of the slide 55 reaches the stop 6, and the adjustment disc 31 is thus fixed in place by the wrench 12 and the wrench slider 7. Then, as the housing component 13 continues to rotate in the first rotation direction D1, the core wire 28 winds around the core wire winding portion 59 and thus performs the angle adjustment function. If the vehicle seat backrest 101 does not require a forward-folding function but only has a rearward tilt adjustment function, then the slide 55 can be eliminated, and the wrench 12 can be directly fixedly connected to the adjustment disc 31.

[0075] Next, refer to Figures 1 to 8 A first embodiment of the second compensation device 200 for a vehicle seat compensation system will be described in more detail. To describe the second compensation device 200 more clearly, in... Figure 5 and Figure 6 The first compensation device 100 is omitted from the text.

[0076] The second compensation device 200 includes a first element 111 that resists rotation relative to the base 103, and a second element 112 that resists rotation relative to the adjusting disc 31 (at least within a predetermined tilt range of the seat back, particularly at least within the range of the seat back from an initial upright state to a maximum rearward tilt range), as well as a cable element 113 and a housing 114. It is understood that the second element does not necessarily need to be permanently anti-rotatably connected to the adjusting disc 31. As mentioned above, by providing the groove 55, the anti-rotation coupling between the adjusting disc 31 and the wrench 12 can be temporarily cancelled, and thus the anti-rotation coupling between the adjusting disc 31 and the second element can be temporarily cancelled.

[0077] The cable element 113 is wound with its first end section around a first reel of the first element 111, and with its opposite second end section around a second reel of the second element 112. For this purpose, the cable element 113 may have enlarged ends 117 and 118 at its two ends, which can be correspondingly fixed in the first element 111 or the second element 112. The housing 114 receives the second element 112 and is fixedly connected to the seat cushion 102. The reel of the first element 111 may be coaxial with the second shaft 105. The reel of the second element 112 may be coaxial with the first shaft 104. The reels of the first element 111 and the second element 112 may have the same diameter. The housing 114 has a cable guide channel 114a that extends tangentially to the second reel. The first element 111 may have a groove for receiving a first end 117 of a cable element. The first element 111 is provided with a tightening screw 116, which is mounted to the first element 111 and can be screwed. The tightening screw 116 can manipulate the first end 117 of the cable element 113 and thus determine the position of the first end 117 of the cable element 113 in the groove.

[0078] The first element 111 may include a first wrench 111a fixed to the first winding reel, the first wrench being configured to be fixedly connected to the base 103. The second element 112 may include a second wrench 112a fixed to the second winding reel, the second wrench being configured to be fixedly connected to the wrench 12 (or wrench slider 7) of the angle adjustment disc 31, for example, by means of a bolt 115.

[0079] During the tilt adjustment of the vehicle seat backrest 101, if the seat cushion 102 remains stationary, the backrest 101 rotates relative to the seat cushion 102 around the first pivot 104. The tilt adjustment disc 31 of the tilt adjustment disc assembly 3 of the first compensation device 100 is held by the second compensation device 200 via the wrench 12. The first compensation device 100 can perform angle compensation and constraint on the vehicle sensing device 10 integrated in the seat belt retractor 106, as explained in detail above.

[0080] During the tilt adjustment of the vehicle seat backrest 101, if the seat cushion 102 and the backrest 101 rotate together relative to the base 103 around the second pivot 105, the tilt adjustment disc 31 of the tilt adjustment disc assembly 3 of the first compensation device 100 is controlled by the second compensation device 200 via the wrench 12, so that the first compensation device 100 can perform angle compensation and constraint on the vehicle sensing device 10 integrated in the seat belt retractor 106.

[0081] Here, we will take the example of the seat cushion 102 and backrest 101 rotating clockwise rearward relative to the base 103 around the second pivot 105 as an example (e.g.) Figure 4 and Figure 6 As the seat cushion 102 and backrest 101 rotate about the second pivot 105, the cable 113 is wound around the reel of the first element 111 (as shown by arrow A in the diagram). Figure 6 (As indicated by arrow B). With the seat cushion 102 as the reference frame, the first element 111 rotates counterclockwise relative to the seat cushion 102 and the backrest 101 about the second pivot 105, and the second element 112 rotates counterclockwise relative to the seat cushion 102 and the backrest 101 about the first pivot 104 (as shown by arrow B). Figure 6 (As indicated by arrow C), the adjusting disc 31, which is anti-rotationally connected to the second element 112, rotates counterclockwise synchronously with the second element 112. With the seat cushion 102 as a reference point, the first element 111 can be figuratively called a "drive wheel with a wrench," and the second element 112 can be figuratively called a "driven wheel with a wrench," wherein the drive wheel is driven by the wrench of the drive wheel, and the drive wheel drives the driven wheel via a cable element and the wrench of the driven wheel.

[0082] In the case of using a vehicle coordinate system, ideally, when the seat cushion 102 and backrest 101 rotate together relative to the base 103 about the second axis of rotation 105, the first element 111 is stationary, and the second element 112 and the adjustment disc 31 do not rotate much, but only translate.

[0083] The process is reversed when the seat cushion 102 and backrest 101 rotate forward together relative to the base 103 about the second pivot 105, wherein the cable 113 is unwound from the reel of the first element 111.

[0084] In such Figures 1 to 8 In the illustrated embodiment, through the combined action of the first compensation device 100 and the second compensation device 200 of the compensation system, not only when the backrest 101 rotates around the first pivot 104 to adjust the tilt angle of the backrest individually, but also when the seat cushion 102 together with the backrest 101 rotates around the second pivot 105 to adjust the tilt angle of the seat cushion and the backrest together, the angle compensation of the vehicle sensing device 100 can be achieved, so that the vehicle sensing device 100 can maintain a substantially vertical orientation and be well constrained.

[0085] In contrast to the present invention, if the angle adjustment plate 31 is fixed to the seat cushion 102, the angle compensation of the vehicle sensing device 100 can only be achieved when the backrest 101 rotates around the first pivot 104. However, the angle compensation and constraint of the vehicle sensing device 100 cannot be achieved when the seat cushion 102 and the backrest 101 rotate together around the second pivot 105.

[0086] The following is for reference. Figures 15 to 19This describes a vehicle seat according to a second embodiment of the present invention. The difference between this second embodiment and the first embodiment may lie only in that the second compensation device 200a of the compensation system is configured differently from the compensation device 200, while other aspects of the vehicle seat, including the first compensation device 100 of the compensation system, may be configured similarly or identically to those in the first embodiment. The same reference numerals may denote the same or functionally identical components. For the sake of brevity, identical components are not described repeatedly or are only briefly described, and reference can be made to the relevant descriptions in the first embodiment. Reference numerals used in the description of the second embodiment, unless otherwise specified... Figures 15 to 19 The details appear in the accompanying drawings related to the first embodiment.

[0087] The second compensation device 200a includes a link 121, which may be a component of a four-bar linkage 130. In this four-bar linkage 130, the base 103 of the vehicle seat forms a frame 133, as shown in... Figure 15 and Figure 16 As shown by a dashed line; the seat cushion 102 forms a connecting rod 134, as in Figure 15 and Figure 16 As shown by another dashed line in the diagram; link 121 constitutes another connecting link; the adjusting disc 31 of the first compensation device 100 constitutes a link opposite to the frame that connects the two connecting links. Advantageously, the four-bar linkage 130 can be a parallelogram mechanism; or the four-bar linkage 130 can be configured as an approximate parallelogram mechanism, wherein, compared to the case of a parallelogram mechanism, the angle change of the adjusting disc is within 5°, for example, within 3°, 2°, or 1°.

[0088] Figure 15 Displays the initial state of the vehicle seats, and Figure 16 This display shows the tilt adjustment status of the vehicle seat, where the seat cushion 102, together with the backrest 101, rotates clockwise backward around the second pivot 105 from its initial state by a certain angle (as shown by arrow A). During this process, the tilt adjustment disc 31 of the tilt adjustment disc assembly 3 of the first compensation device 100 is controlled by the linkage 121. With the seat cushion 102 as the reference frame, the tilt adjustment disc 31 rotates in the opposite direction (as shown by arrow C) to achieve angle compensation for the vehicle sensing device. In the vehicle coordinate system, ideally, the tilt adjustment disc 31 can remain essentially stationary; in other words, the orientation of the tilt adjustment disc 31 can remain essentially unchanged, and thus the vertical orientation of the vehicle sensing device 10 can remain essentially unchanged.

[0089] When the seat cushion 102 remains stationary and the backrest 101 rotates relative to the seat cushion 102 around the second pivot 104, the angle adjustment disc 31 remains stationary via the connecting rod 121 or via the second compensation device 200a. The first compensation device 100 can realize the angle compensation function and constraint function of the vehicle sensing device 10.

[0090] Figure 18 The connection structure 131 between the connecting rod 121 and the wrench 12 of the angle adjustment plate 31 is shown in partial sectional view. The connection structure includes a stepped bolt 122 and a nut 123, which rotatably connect the upper end of the connecting rod 121 to the angle adjustment plate 31, or the wrench 12 of the angle adjustment plate.

[0091] Figure 19 The connection structure 132 between the connecting rod 121 and the base 103 is shown in partial sectional view. This connection structure includes a fixing plate 124 with a bent end and a welded nut at that end. A bolt 125 passes through the lower end of the connecting rod 121 from the outside and is screwed into the welded nut 127 of the fixing plate 124. A spring element 126, fitted onto the bolt 125 and located between the fixing plate 124 and the connecting rod 121, presses the connecting rod 121 against the head of the bolt 125, allowing the connecting rod 121 to rotate about the bolt 125 as a pivot.

[0092] It should be noted that the terminology used herein is for illustrative purposes only and is not intended to limit the disclosure. The singular forms “a” and “the one” as used herein should include the plural forms unless the context explicitly states otherwise. It is understood that the terms “comprising” and “including,” and other similar terms, when used in the application documents, specifically describe the presence of the stated operation, element, and / or component, without excluding the presence or addition of one or more other operations, elements, components, and / or combinations 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, similar reference numerals always denote similar elements.

[0093] The thickness of the elements in the accompanying drawings may be exaggerated for clarity. It is also understood that if an element is described as being on, coupled to, or connected to another element, then the element may be directly formed on, coupled to, or connected to the other element, or there may be one or more intermediate elements between them. Conversely, if the expressions "directly on," "directly coupled to," and "directly connected to" are used herein, it indicates that there is no intermediate element. Other terms used to describe relationships between elements should be interpreted similarly, such as "between" and "directly between," "attached" and "directly attached," "adjacent" and "directly adjacent," etc.

[0094] Terms such as “top,” “bottom,” “above,” “below,” “over,” “under,” etc., are used to describe the relationship of one element, layer, or region relative to another element, layer, or region, as shown in the accompanying drawings. It is understood that these terms should also encompass other orientations of the device in addition to those described in the accompanying drawings.

[0095] It is 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 merely used to distinguish one element from another. Therefore, a first element may be referred to as a second element without departing from the teachings of the inventive concept.

[0096] It can also be considered that all the exemplary embodiments disclosed herein can be arbitrarily combined with each other. Finally, it should be noted that the above embodiments are merely for understanding the present invention and do not constitute a limitation on the scope of protection of the present invention. For those skilled in the art, modifications can be made based on the above embodiments, and these modifications do not depart from the scope of protection of the present invention.

Claims

1. A compensation system for a seatbelt retractor, characterized in that, The compensation system is adapted to a vehicle seat having a base (103), a seat cushion (102), and a backrest (101). The backrest is rotatably connected to the seat cushion about a first pivot (104), and the seat cushion and backrest are rotatably connected to the base about a second pivot (105) spaced apart from the first pivot. The backrest is equipped with a seatbelt retractor (106), which integrates a rotatable vehicle sensing device (10). The compensation system includes a first compensation device (100) configured to compensate and constrain the vehicle sensing device when the backrest rotates relative to the seat cushion about a first pivot to adjust the rearward tilt angle of the backrest. The first compensation device includes an adjustment disc (31) rotatable relative to the backrest about the first pivot. The compensation system includes a second compensation device (200, 200a), which is configured to fix the adjustment disc when the backrest rotates relative to the seat cushion about a first axis to adjust the rearward tilt angle of the backrest, and to cause the adjustment disc to rotate in the opposite direction relative to the seat cushion about the first axis when the seat cushion and the backrest rotate together about a second axis relative to the base to adjust the rearward tilt angle of the backrest and the seat cushion, thereby the first compensation device provides angle compensation and constraint for the vehicle sensing device.

2. The compensation system for a seat belt retractor according to claim 1, characterized in that, The second compensation device includes a first element (111) that resists rotation relative to the base and a second element (112) that resists rotation relative to the angle adjustment disc, as well as a cable element (113) that winds a first winding wheel of the first element with its first end section and winds a second winding wheel of the second element with its opposite second end section.

3. The compensation system for a seat belt retractor according to claim 2, characterized in that, The first winding wheel is coaxial with the second shaft, and the second winding wheel is coaxial with the first shaft.

4. The compensation system for a seat belt retractor according to claim 3, characterized in that, The first element includes a first wrench (111a) fixed to a first winding reel, the first wrench being configured to be fixedly connected to the base of the vehicle seat, and the second element includes a second wrench (112a) fixed to a second winding reel, the second wrench being configured to be fixedly connected to the wrench (12) of the angle adjustment disc.

5. The compensation system for a seat belt retractor according to claim 2, wherein The second compensation device also includes a housing (114) that receives the second element and is fixedly connected to the seat cushion.

6. The compensation system for a seat belt retractor according to claim 5, characterized in that, The housing has a cable guide channel that extends tangentially to the second winding reel.

7. The compensation system for a seat belt retractor according to any one of claims 2 to 6, characterized in that, The first and second winding reels have the same diameter.

8. The compensation system for a seatbelt retractor according to any one of claims 2 to 6, characterized in that, The first element has a groove for receiving a first end (117) of a cable element. The first element is provided with a tightening screw (116) which is mounted to the first element and can be screwed. The tightening screw can manipulate the first end of the cable element and thus determine the position of the first end of the cable element in the groove.

9. The compensation system for a seatbelt retractor according to claim 1, characterized in that, The second compensation device includes a link (121) rotatably connected to the base of the vehicle seat and rotatably connected to an adjustment disc, wherein the link is configured to fix the adjustment disc when the backrest rotates relative to the seat cushion about a first axis of rotation, and to cause the adjustment disc to rotate in the opposite direction relative to the seat cushion about the first axis of rotation when the seat cushion and the backrest rotate together about a second axis of rotation relative to the base, thereby the first compensation device provides angle compensation and constraint for the vehicle sensing device.

10. The compensation system for a seatbelt retractor according to claim 9, characterized in that, The base, the connecting rod, the angle adjustment plate, and the seat cushion constitute a four-bar linkage.

11. The compensation system for a seatbelt retractor according to claim 10, characterized in that, The four-bar linkage is a parallelogram mechanism, wherein when the seat cushion and backrest rotate together around the second pivot relative to the base, the angle change of the adjustment disc is within 5°.

12. The compensation system for a seatbelt retractor according to any one of claims 9 to 11, characterized in that, The connecting rod is rotatably connected in the region of its first end to the wrench of the adjustment disc of the first compensation device via a stepped bolt (122), and in the region of its second end opposite to the first end to the fixing plate (124) fixed to the base of the vehicle seat via an additional bolt (125), the additional bolt passing through the connecting rod and screwed into the welded nut (127) of the fixing plate, a spring element (126) fitted on the additional bolt and disposed between the fixing plate and the connecting rod, and pressing the connecting rod toward the bolt head of the additional bolt, such that the connecting rod is pivotable about the unthreaded rod section of the additional bolt.

13. The compensation system for a seatbelt retractor according to any one of claims 1 to 6 and 9 to 11, characterized in that, The first and second rotating shafts are parallel to each other, and the first rotating shaft is located above and behind the second rotating shaft.

14. A vehicle seat having a base, a seat cushion, and a backrest, the backrest being rotatably connected to the seat cushion about a first pivot, the seat cushion and the backrest being rotatably connected to the base about a second pivot spaced apart from the first pivot, the backrest being equipped with a seatbelt retractor, the seatbelt retractor integrating a rotatable vehicle sensing device, characterized in that, The vehicle seat further includes a compensation system for the seat belt retractor according to any one of claims 1 to 13.

15. The vehicle seat according to claim 14, characterized in that, The vehicle seats are zero-gravity seats.

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