Safety belt retractor

Abstract

The utility model provides a safety belt retractor, which is applied to the technical field of vehicle seats and is characterized in that when a seat backrest is adjusted, for example, the seat backrest is overturned and folded, particularly when the overturning angle of the seat is too large, a driving assembly can drive a worm to rotate, and the worm and a worm wheel are in meshing transmission, so that the safety belt retractor can drive the seat backrest to rotate; the worm wheel can drive the vehicle sensing seat to rotate relative to the support, for example, the vehicle sensing seat rotates in the opposite direction of the chair back and at the same angle, the vehicle sensing seat can still be adjusted or kept in the horizontal state, at the moment, the vehicle sensing assembly is not prone to being abnormally activated to act on the locking disc, and then the safety belt can be pulled out of the retractor easily. The influence on the overturning range of the seat backrest is reduced, the comfort degree of a driver and passengers is improved, and the use of the space of the rear-row seat of the automobile is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle seat, in particular to a safety belt retractor. BACKGROUND

[0002] For the rear seat of a vehicle such as MPV (Multi-Purpose Vehicles), since it is far away from the C pillar and the seat can slide a long distance, when arranging the safety belt retractor, it is generally arranged on the seat back. Due to the use requirements of the driver and passengers for the vehicle, the seat back of the rear seat needs to be turned over and folded. When the turning angle of the seat back is too large, the vehicle sensing component is abnormally activated to act on the locking structure of the retractor, so that the safety belt is locked and cannot be pulled out of the retractor. Due to this limitation, the turning range of the seat back is greatly affected, which affects the comfort of the driver and passengers and the use of the rear space of the vehicle.

[0003] Therefore, there is a need for a new technical solution. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the present application provides a safety belt retractor.

[0005] The present application provides the following technical solutions:

[0006] According to the safety belt retractor provided by the present application, the safety belt retractor is installed on the seat back, and the safety belt retractor comprises a reel assembly, a vehicle sensing component and a vehicle sensing adjusting assembly. The reel assembly comprises a reel, a bracket and a locking disc. The reel is rotatably fixed in the bracket, and the locking disc is fixedly connected with one end of the reel and arranged outside the bracket. The vehicle sensing component is fixed on the bracket and configured to lock the locking disc when the vehicle sensing component detects that the vehicle acceleration reaches a threshold value, so as to prevent the safety belt on the reel from being pulled out further. The vehicle sensing adjusting assembly comprises a driving assembly, a worm and a worm wheel. The driving assembly is installed on the bracket, the output shaft of the driving assembly is coaxially connected with the worm, the worm wheel is engaged with the worm, and the worm wheel is fixed on the vehicle sensing seat and arranged coaxially with the first rotating shaft. The driving assembly can drive the worm wheel and the worm to rotate and transmit power, so as to adjust or keep the vehicle sensing seat in a horizontal position.

[0007] Preferably, the driving assembly comprises a motor, a Hall component and a controller. The output shaft of the motor serves as the output shaft of the driving assembly. The Hall component comprises a magnetic ring connected with the output shaft of the motor and a Hall sensor electrically connected with the controller. The Hall sensor senses the rotation of the magnetic ring and generates an electric signal to the controller. The controller is also used to control the start and stop of the motor.

[0008] Preferably, the vehicle sensing adjusting assembly further comprises a PCB assembly fixed on the bracket, the PCB assembly comprises a boss and two wiring parts electrically connected with the PCB respectively, the Hall sensor is fixed on the boss, the two wiring parts are connected with two wiring ends of the motor respectively, and the PCB assembly is electrically connected with the controller.

[0009] Preferably, the PCB assembly is provided with a wiring harness interface for connecting the controller, so that the PCB assembly can receive the electrical signal of the sensor and transmit it to the controller.

[0010] Preferably, the sensor comprises one or more of a backrest angle sensor, a cushion angle sensor and a vehicle inclination sensor.

[0011] Preferably, the vehicle sensing adjusting assembly further comprises a motor bracket, the motor bracket comprises a fixed plate and a mounting plate vertically arranged on the fixed plate; an installation groove is arranged on the end of the mounting plate away from the fixed plate, and the installation groove penetrates the plate surface of the mounting plate, so that the output shaft of the motor passes through the installation groove; the motor is fixed on the mounting plate, and the fixed plate is installed on the bracket; a reinforcing plate vertically extending on the fixed plate is connected with the mounting plate, and the reinforcing plate extends from the mounting plate in a direction perpendicular to the mounting plate and gradually decreases in width.

[0012] Preferably, the vehicle sensing assembly and the vehicle sensing adjusting assembly are fixed on the bracket through a bracket connecting plate, the vehicle sensing assembly further comprises a sensing base and a sensing bracket fixed on the bracket connecting plate, the sensing bracket comprises two fixed arm parts fixed on the bracket connecting plate and a mounting part between the two fixed arm parts, the sensing base and the mounting part are both provided with a pivot hole for the first rotating shaft to pass through, and the vehicle sensing seat is pivotally arranged between the sensing base and the sensing bracket.

[0013] Preferably, the vehicle sensing assembly further comprises a sensing body, a vehicle sensing arm and a swing arm, the sensing body is arranged in the vehicle sensing seat, the vehicle sensing arm is rotatably arranged on the top of the sensing body through a second rotating shaft installed on the vehicle sensing seat, and the swing arm is rotatably arranged on the top of the vehicle sensing arm through a third rotating shaft on the sensing base, the vehicle sensing arm is used for engaging and locking with the locking disc, the first rotating shaft and the third rotating shaft are perpendicular to the surface where the bracket connecting plate is located, and the second rotating shaft is parallel to the surface where the bracket connecting plate is located.

[0014] Preferably, the contact part of the swing arm contacting the vehicle sensing arm is arranged on the swing arm in the displacement direction of the vehicle sensing arm.

[0015] Preferably, the contact portion has an extended portion extending in a direction away from the third rotating shaft, and the extended portion is bent toward the vehicle sensing arm.

[0016] Compared with the prior art, the at least one technical solution adopted in this application can achieve the following beneficial effects:

[0017] In the present application, when the seat belt retractor is in the state of seat back adjustment, such as seat back flipping and folding, especially when the seat flipping angle is too large, the drive component can drive the worm to rotate, and the worm and worm gear engage to transmit the transmission, and then the worm gear can drive the vehicle sensing seat to rotate relative to the bracket. For example, the vehicle sensing seat rotates in the opposite direction and at the same angle as the seat back, so that the vehicle sensing seat can still be adjusted or maintained in a horizontal state. At this time, the vehicle sensing component is not easily abnormally activated to act on the locking plate, and the seat belt is easier to pull out from the retractor, reducing the impact on the flipping range of the seat back, and improving the comfort of the driver and passengers and the use of the rear seat space of the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 is an assembly diagram of the seat belt retractor in this application;

[0020] Figure 2 It is an exploded view of the seat belt retractor in this application;

[0021] Figure 3 is a schematic diagram of the bracket connecting plate in this application;

[0022] Figure 4 This is the first schematic diagram of the induction base in this application;

[0023] Figure 5 This is the second schematic diagram of the induction base in this application;

[0024] Figure 6 This is the first schematic diagram of the vehicle sensor seat in this application;

[0025] Figure 7 This is the second schematic diagram of the vehicle sensor seat in this application;

[0026] Figure 8 is a schematic diagram of the swing arm in this application;

[0027] Figure 9 This is the first schematic diagram of the vehicle sensing arm in this application;

[0028] Figure 10 This is the second schematic diagram of the vehicle sensing arm in this application;

[0029] Figure 11 is a schematic diagram of the worm gear in this application;

[0030] Figure 12 is a schematic diagram of the induction bracket in this application;

[0031] Figure 13 is a schematic diagram of the worm gear in this application;

[0032] Figure 14 is a schematic diagram of the motor bracket in this application;

[0033] Figure 15 is a schematic diagram of the motor in this application;

[0034] Figure 16 This is the first schematic diagram of the induction bracket in this application;

[0035] Figure 17 is the second schematic diagram of the induction bracket in this application;

[0036] Figure 18 This is a diagram showing the arrangement of various components on a vehicle seat in this application;

[0037] Figure 19 is a schematic diagram of the controller and the seat belt retractor connected via a wiring harness in this application;

[0038] Figure 20 This is a schematic diagram showing that the vehicle sensing seat always maintains a constant position relative to the horizontal direction when the seat back is flipped over in the present application.

[0039] Reference numerals: 1, reel assembly; 101, bracket; 102, locking plate; 2, bracket connecting plate; 201, first mounting groove; 202, first mounting hole; 203, second mounting hole; 204, third mounting hole; 205, first positioning hole; 206, fourth mounting hole; 3, sensing base; 301, first mounting portion; 302, limit end; 303, first positioning shaft; 304, hole column; 305, third rotating shaft Axis; 4, vehicle sensing seat; 401, first axis; 402, second axis; 403, vehicle sensing hole; 404, accommodation portion; 405, protrusion; 5, swing arm; 501, swing hole; 502, contact portion; 503, locking portion; 504, extension portion; 6, vehicle sensing arm; 601, second rotating shaft; 602, spherical surface; 603, transmission portion; 604, restriction portion; 7, sensor; 8, worm gear; 801, Second mounting part; 802, gear part; 9, sensing bracket; 901, fifth mounting hole; 902, third mounting part; 10, worm; 1001, tooth part; 1002, sixth mounting hole; 11, motor bracket; 1101, second mounting slot; 1102, seventh mounting hole; 1103, fourth mounting part; 1104, second positioning shaft; 12, micro reduction motor; 1201, high reduction ratio structure; 1202, output shaft of motor; 1203, terminal; 1204, magnetic ring; 13, PCB board assembly; 1301, terminal; 1302, Hall sensor; 1303, wiring harness interface; 1304, eighth mounting hole; 14, lumbar pad motor; 15, tilt motor; 16, rear vertical motor; 17, lumbar pad switch; 18, electric seat switch; 19, front vertical motor; 20, sliding motor; 21, controller. DETAILED DESCRIPTION

[0040] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0041] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0042] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0043] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0044] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples, however, one skilled in the art will appreciate that the examples can be practiced without these specific details.

[0045] Through in-depth research and improvement exploration on the retractor and the adjustment of the vehicle sensing component, the applicant discovered that: currently, in order to deal with the situation where the vehicle sensing component is abnormally activated and acts on the locking structure of the retractor, causing the safety webbing to be locked and the webbing to be unable to be pulled out of the retractor, a pull-wire structure is usually adopted. An angle adjustment mechanism is installed on the seat shaft, and the angle adjustment mechanism is connected to the vehicle sensing component in the retractor through a pull wire. When the seat rotates, the angle adjustment mechanism converts the change in seat angle into a change in the length of the pull wire, which is then transmitted to the vehicle sensing component (through a speed reduction mechanism), causing the vehicle sensing component to rotate to the same angle in the opposite direction relative to the seat back, so as to maintain the position of the vehicle sensing component relative to the horizontal direction unchanged. In this way, the webbing will not be locked and will not affect the flipping of the seat back.

[0046] However, the existing cable adjustment structure has added an angle adjustment structure and a longer cable, which adds many parts, takes up a large space, increases the weight of the seat belt assembly, and significantly increases the cost. In addition, when installing the seat belt, the vehicle manufacturer needs to additionally install the angle adjustment structure and fix the cable on the seat shaft, which makes assembly difficult.

[0047] Based on this, the technical solutions provided by the various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0048] The embodiment of this specification proposes a seat belt retractor, such as Figure 1 and Figure 2As shown, it is installed on the seat back. The seat belt retractor includes a reel assembly 1, a vehicle sensing assembly and a vehicle sensing adjustment assembly. The reel assembly 1 includes a reel, a bracket 101 and a locking plate 102; the reel is rotatably fixed inside the bracket 101, and the locking plate 102 is fixedly connected to one end of the reel, and the locking plate 102 is placed outside the bracket 101; the vehicle sensing assembly can be fixed to the bracket 101 through the bracket mounting plate 2, and is configured to lock the locking plate 102 when the vehicle sensing assembly detects that the vehicle acceleration reaches a threshold value, so as to prevent the reel from being rotated. The seatbelt is further extended. The vehicle sensing assembly also includes a vehicle sensing seat 4 that can rotate relative to the bracket 101 along a first rotation axis. The vehicle sensing adjustment assembly includes a drive assembly, a worm 10, and a worm gear 8. The drive assembly can be mounted on the bracket 101 via the bracket mounting plate 2. The output shaft of the drive assembly is coaxially connected to the worm 10. The worm gear 8 meshes with the worm 10. The worm gear 8 is fixed to the vehicle sensing seat 4 and arranged coaxially with the first rotation axis. The drive assembly can drive the worm gear 8 and worm 10 to rotate and transmit the rotation to adjust or maintain the vehicle sensing seat 4 in a horizontal position. The locking plate 102 is, for example, a ratchet. This seatbelt retractor can be used to adjust the angle of the seatbelt.

[0049] In one embodiment, if Figure 15 、 Figure 16 as well as Figure 19 As shown, the drive assembly includes a motor, a Hall effect sensor, and a controller 21. The motor's output shaft 1202 serves as the drive assembly's output shaft. The Hall effect sensor includes a magnetic ring 1204 connected to the motor's output shaft 1202 and a Hall effect sensor 1302 electrically connected to the controller 21. The Hall effect sensor 1302 senses the rotation of the magnetic ring 1204 and generates an electrical signal that is transmitted to the controller 21. The controller 21 also controls the start and stop of the motor. The controller 21 uses the electrical signal transmitted by the Hall effect sensor 1302 to determine the number of revolutions of the motor's output shaft 1202 and / or controls the number of revolutions required for the motor's output shaft 1202 to maintain the vehicle sensing seat 4 in a horizontal position. The controller 21 can be a seat ECU (Electronic Control Unit) mounted on the vehicle seat, or it can be directly mounted in the retractor. The motor is, for example, a micro reduction motor 12, and the magnetic ring 1204 is a Hall effect sensor. The retractor controls the vehicle sensing assembly via the motor.

[0050] In one embodiment, if Figure 2 、 Figure 15 as well as Figure 16As shown, the vehicle feel adjustment assembly also includes a PCB assembly 13 fixed to the bracket 101. The PCB assembly 13 includes bosses and two connection portions 1301 that are electrically connected to the PCB. A Hall sensor 1302 is fixed to the bosses. The two connection portions 1301 are respectively connected to two terminals 1203 on the motor. The PCB assembly 13 is electrically connected to the controller 21. The PCB assembly 13 can be fixed to the bracket 101 via the bracket mounting plate 2.

[0051] In one embodiment, if Figure 16 and Figure 19 As shown, the PCB board assembly 13 is provided with a harness interface 1303 for connecting to the controller 21 , so that the PCB board assembly 13 can receive the electrical signal of the sensor and transmit it to the controller 21 .

[0052] In one embodiment, if Figure 18 As shown, the sensor includes one or more of a backrest angle sensor, a seat cushion angle sensor, and a vehicle tilt angle sensor. For example, the electrical signal of the backrest angle sensor is transmitted to the controller 21 to generate the adjustment angle and tilt angle of the seat back.

[0053] In one embodiment, if Figure 1 and Figure 2 As shown, the vehicle feel adjustment component also includes a motor bracket 11, which includes a fixing plate and a mounting plate vertically arranged on the fixing plate; a mounting groove is provided at the end of the mounting plate facing away from the fixing plate, and the mounting groove passes through the plate surface of the mounting plate so that the output shaft 1202 of the motor passes through the mounting groove; the motor is fixed on the mounting plate, and the fixing plate is installed on the bracket 101 through the bracket mounting plate 2; a reinforcing plate connected to the mounting plate extends vertically on the fixing plate, and the reinforcing plate extends from the mounting plate in a direction perpendicular to the mounting plate and the width gradually decreases.

[0054] In one embodiment, if Figure 1 and Figure 2 As shown, the vehicle sensing assembly and the vehicle sensing adjustment assembly are fixed to the bracket 101 via the bracket connecting plate 2. The vehicle sensing assembly also includes a sensing base 3 and a sensing bracket 9 fixed to the bracket connecting plate 2. The sensing bracket 9 includes two fixed arms fixed to the bracket connecting plate 2 and a mounting portion located between the two fixed arms. The sensing base 3 and the mounting portion are both provided with a pivot hole for the first rotating shaft to pass through. The vehicle sensing base 4 is pivotally positioned between the sensing base 3 and the sensing bracket 9. The bracket connecting plate 2 can serve as a part of the bracket 101.

[0055] In one embodiment, if Figure 1 and Figure 2As shown, the vehicle sensing assembly also includes a sensing body 7, a vehicle sensing arm 6 and a swing arm 5. The sensing body 7 is placed in the vehicle sensing seat 4. The vehicle sensing arm 6 is rotatably covered on the top of the sensing body 7 through a second rotating shaft 601 installed on the vehicle sensing seat 4. The swing arm 5 is rotatably covered on the top of the vehicle sensing arm 6 through a third rotating shaft 305 on the sensing base 3. The vehicle sensing arm 6 is used to engage and lock with the locking plate 102. The first rotating shaft and the third rotating shaft 305 are perpendicular to the surface of the bracket connecting plate 2, and the second rotating shaft 601 is parallel to the surface of the bracket connecting plate 2.

[0056] In one embodiment, if Figure 2 and Figure 8 As shown, the contact portion 502 where the swing arm 5 contacts the vehicle sensing arm 6 is extended on the swing arm 5 along the displacement direction of the vehicle sensing arm 6 .

[0057] In one embodiment, if Figure 2 and Figure 8 As shown, the contact portion 502 is extended with an extension portion 504 in a direction away from the third rotation axis 305 , and the extension portion 504 is bent toward the vehicle sensing arm 6 .

[0058] The present application installs an integrated micro reduction motor 12 on the retractor, and a Hall induction magnetic coil is provided at the tail of the motor to determine the number of revolutions of the motor. A worm 10 is installed at the other end of the motor, and a worm wheel 8 is installed on the vehicle sensing seat 4 of the vehicle sensing assembly. The vehicle sensing assembly is designed to be rotatable along the axis, and the worm 10 is engaged with the worm wheel 8 on the vehicle sensing seat 4 in the vehicle sensing assembly. When the angle of the seat back is adjusted, the angle sensor on the seat back transmits the angle change of the seat back to the controller 21; according to the reduction ratio of the motor, the controller 21 controls the number of revolutions of the motor, and the worm 10 of the motor is engaged with the worm wheel 8 on the vehicle sensing seat 4, driving the vehicle sensing seat 4 to rotate in the opposite direction and at the same angle as the seat back, thereby ensuring that the vehicle sensor always maintains its position relative to the horizontal direction when the seat back is flipped over, and the webbing will not be locked. The present application does not require an additional cable adjustment structure and a longer cable to be installed at the seat shaft, thereby reducing the number of parts and the required layout space; the present application installs an integrated micro-reduction motor 12 on the retractor, and the micro-motor and the reduction gear are integrated with a compact structure; the present application adopts a worm gear 8 and a worm 10 transmission structure, which has a smooth and noiseless transmission and self-locking property, ensuring that the vehicle sensing component works stably when the seat is not adjusted.

[0059] In one embodiment, if Figure 1 and Figure 2 As shown, the retractor includes a reel assembly 1, a bracket connecting plate 2, an induction base 3, a vehicle sensing seat 4, a swing arm 5, a vehicle sensing arm 6, an induction body 7, a worm gear 8, an induction bracket 9, a worm 10, a motor bracket 11, and a micro reduction motor 12.

[0060] The bracket connecting plate 2 is as follows Figure 3The metal component shown is fixed to the bracket 101 of the reel assembly 1 by screws. The bracket 101 is frame-shaped. The bracket connecting plate 2 is provided with a first mounting slot 201 and two first mounting holes 202 for the sensing base 3. The two first mounting holes 202 are used for positioning. The first mounting slot 201 and the first mounting portion 301 of the sensing base 3 are contoured. The two first mounting holes 202 facilitate accurate installation of the vehicle sensor assembly to ensure locking performance. Second mounting holes 203 are provided for fastening to the sensing bracket 9 via self-tapping screws. It also has two third mounting holes 204 and two first positioning holes 205. The positioning shaft of the motor bracket 11 is installed in the first positioning holes 205 and fixed to the motor bracket 11 via self-tapping screws. The first mounting holes 202 and the first positioning holes 205 ensure the relative position of the vehicle sensor base 4 and the micro reduction motor 12, allowing the worm 10 to engage with the worm wheel 8 accurately. A fourth mounting hole 206 is provided for mounting the PCB board assembly 13.

[0061] The induction base 3 is as follows Figure 4 and Figure 5 As shown, the first mounting portion 301 is embedded in the first mounting groove 201 of the bracket connecting plate 2, and the limiting end 302 of the sensing base 3 is located on the surface of the bracket connecting plate 2, which can prevent the sensing base 3 from falling out downward. At the same time, two claws (not shown in the figure) are provided to be clamped on the lower surface of the bracket connecting plate 2 to prevent the sensing base 3 from falling out upward; the two first positioning shafts 303 are installed in the two first positioning holes 205 of the bracket connecting plate 2, and a hole column 304 is provided thereon for the clearance fit rotation of the first axis body 401 of the vehicle sensing seat 4, and the hole of the hole column 304 serves as a pivot hole for the first rotating shaft to pass through; a third rotating shaft 305 is provided for the clearance fit rotation of the swing arm 5, and the end of the shaft is a claw structure (not shown in the figure), which can prevent the swing arm 5 from falling out after installation.

[0062] The car seat 4 is as follows Figure 6 and Figure 7 As shown, it is provided with a first shaft body 401 that rotates with a clearance fit with the sensing base 3, and a second shaft body 402 that rotates with a clearance fit with the sensing bracket 9. The first shaft body 401 and the second shaft body 402 are coaxial and constitute a first rotating shaft; a vehicle sensing hole 403 that rotates with a clearance fit with the vehicle sensing arm 6 is provided, and a accommodating portion 404 for the sensing body 7 is also provided. When the vehicle is impacted or tilted, the sensing body 7 rolls, pushing the vehicle sensing arm 6 to rotate along the axis of the vehicle sensing hole 403 to achieve locking performance; it is also provided with a protrusion 405, which is interference fit with the second mounting portion 801 of the worm gear 8, and when the worm gear 8 rotates, it drives the vehicle sensing seat 4 to rotate at the same time.

[0063] The swing arm 5 is as shown in FIG. Figure 8As shown, the swing hole 501 is arranged to rotate in clearance fit with the induction base 3, and can be flexibly rotated along the axis of the swing hole 501 after installation; the contact part 502 is arranged to contact with the vehicle sensing arm 6, and is designed to be elongated along the displacement direction of the vehicle sensing arm 6, so as to transmit the displacement of the induction body 7 to the swing arm 5 through the vehicle sensing arm 6, and then lock by the contact between the arranged locking part 503 and the ratchet wheel; the elongated part is designed to increase the weight of the end of the swing arm 5, so as to prevent the swing arm 5 from rotating to the ratchet wheel direction due to the weight in the process of flattening the seat back, and cause false locking.

[0064] As shown in the vehicle sensing arm 6, Figure 9 and Figure 10 As shown, the second rotating shaft 601 is arranged to rotate in clearance fit with the vehicle sensing base 4, and can be flexibly rotated along the axis of the second rotating shaft 601 after installation; the spherical surface 602 is arranged to contact with the induction body 7, so as to ensure that the corresponding displacement of the induction body 7 is the same under the same acceleration impact or the angle of inclination in each direction; the transmission part 603 is arranged to transmit the displacement of the induction body 7 to the contact part 502 of the swing arm 5; the limiting part 604 is further arranged, which contacts with the surface of the vehicle sensing base 4 after moving a certain distance under the design of meeting the locking angle, at this time the induction body 7 cannot move any more, so as to control the moving distance of the induction body 7 and prevent the induction body 7 from being pulled out.

[0065] As shown in the induction body 7, Figure 2 different from the traditional spherical induction body 7, the structure increases the moving distance of the induction body 7. For example, the upper part of the induction body 7 is large in volume, and the lower part is small in volume.

[0066] As shown in the worm gear 8, Figure 11 the second installation part 801 is arranged, which is in interference fit with the protruding part 405 of the vehicle sensing base 4, and the worm gear 8 is installed and fixed on the vehicle sensing base 4 through the second installation part 801; the gear part 802 is further arranged, which is engaged with the tooth part 1001 of the worm 10, so that the worm gear 8 can drive the vehicle sensing base 4 to rotate when the worm 10 rotates.

[0067] As shown in the induction support 9, Figure 12 the fifth installation hole 901 is arranged as a pivot hole for the first rotating shaft to pass through, the installation part of the induction support 9 is arranged at an obtuse angle, and the fifth installation hole 901 is located in the middle of the installation part of the induction support 9, the second shaft body 402 of the vehicle sensing base 4 is in clearance fit with the second installation hole 203, and the vehicle sensing base 4 can be flexibly rotated along the axis of the fifth installation hole 901 after installation; the third installation part 902 is further arranged, which can be fixed with the support connecting plate 2 by using self-tapping screws, so as to limit the axial movement of the whole vehicle sensing base 4.

[0068] As shown in the worm 10, Figure 13As shown, a tooth portion 1001 is provided, which can engage with the gear portion 802 of the worm wheel 8; a sixth mounting hole 1002 is also provided, which is interference fit with the output shaft 1202 of the motor. When the motor drives the worm 10 to rotate, the worm wheel 8 can drive the vehicle sensor seat 4 to rotate.

[0069] The motor bracket 11 is as shown in FIG. Figure 14 As shown, it is provided with a second mounting groove 1101, through which the output shaft 1202 of the motor can be passed; a seventh mounting hole 1102 is provided, which can be installed and fixed with the micro reduction motor 12 by screws; it is also provided with a fourth mounting portion 1103 and a second positioning shaft 1104, and the second positioning shaft 1104 is installed in the first positioning hole 205 of the bracket connecting plate 2, and then installed and fixed with the bracket connecting plate 2 by self-tapping screws.

[0070] The micro reduction motor 12 is as follows Figure 15 As shown, a magnetic ring 1204, a Hall effect sensor, is press-fitted onto the rear end of the motor. This magnet is connected to the vehicle's ECU. A high-speed reduction ratio structure 1201 is located at the motor's head. The motor's output shaft 1202 is a low-speed shaft, and magnetic ring 1204 can be mounted on a high-speed shaft. When the ECU outputs a signal to rotate the motor, the Hall effect sensor confirms and controls the number of motor revolutions, precisely controlling the desired rotation angle of the vehicle sensor base 4.

[0071] The PCB board assembly 13 is as follows Figure 16 and Figure 17 As shown, a wiring portion 1301 is provided, which is connected to the terminal 1203 of the micro reduction motor 12; a self-tapping screw fixes the PCB board assembly 13 to the fourth mounting hole 206 of the bracket connecting plate 2 through the eighth mounting hole 1304; it is also provided with a Hall sensor 1302, which is connected to the seat ECU through the provided wiring harness interface 1303; when the ECU outputs a signal to let the motor rotate, the number of motor rotations is confirmed and controlled by the Hall induction magnetic coil, so as to achieve precise control of the required rotation angle of the vehicle sensing seat 4.

[0072] like Figure 18 、 Figure 19 as well as Figure 20As shown, the vehicle seat is also provided with a lumbar cushion motor 14, a tilt motor 15, a rear vertical motor 16, a lumbar cushion switch 17, an electric seat switch 18, a front vertical motor 19, a sliding motor 20 and the like. When the controller 21 sends a signal to the tilt motor 15 of the seat to make the seat tilt, a signal is also sent to the motor of the seat belt retractor at the same time. Through the calculation and setting of the controller 21, the motor worm 10 drives the worm wheel 8 of the seat pan 4 to rotate at the same angle in the opposite direction of the seat tilt. The seat pan always keeps the position unchanged relative to the horizontal direction when the seat back is turned at different angles. The scheme of the present application has the advantages of less parts, compact structure, small space occupation, stable performance and convenient installation for the vehicle manufacturer.

[0073] In the present specification, the same or similar parts among various embodiments can be referred to each other, and each embodiment focuses on the difference from other embodiments. Especially, for the embodiments described later, the description is relatively simple, and the relevant part can be referred to the part of the foregoing embodiments.

[0074] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A seat belt retractor, mounted on a seat back, the seat belt retractor comprising a reel assembly, a vehicle sensing assembly and a vehicle sensing adjustment assembly, the reel assembly comprising a reel, a bracket and a locking plate; the reel is rotatably fixed inside the bracket, the locking plate is fixedly connected to one end of the reel, and the locking plate is placed outside the bracket; the vehicle sensing assembly is fixed to the bracket and is configured to lock the locking plate when the vehicle sensing assembly detects that the vehicle acceleration reaches a threshold value, so as to prevent the seat belt on the reel from being further pulled out, the vehicle sensing assembly further comprising a vehicle sensing seat rotatable relative to the bracket along a first rotating axis, characterized in that The vehicle feel adjustment component includes a drive component, a worm and a worm wheel. The drive component is installed on the bracket. The output shaft of the drive component is coaxially connected to the worm, and the worm wheel is engaged with the worm. The worm wheel is fixed on the vehicle feel seat and is coaxially arranged on the first rotating shaft. The drive component can drive the worm wheel and the worm to rotate and transmit, so as to adjust or keep the vehicle feel seat in a horizontal position.

2. The seat belt retractor according to claim 1, characterized in that: The drive assembly includes a motor, a Hall assembly and a controller. The output shaft of the motor serves as the output shaft of the drive assembly. The Hall assembly includes a magnetic ring connected to the output shaft of the motor and a Hall sensor electrically connected to the controller. The Hall sensor senses the rotation of the magnetic ring and generates an electrical signal to transmit to the controller. The controller is also used to control the start and stop of the motor.

3. The seat belt retractor according to claim 2, characterized in that: The vehicle feel adjustment component also includes a PCB board assembly fixed on the bracket, the PCB board assembly includes a boss and two wiring parts respectively electrically connected to the PCB board, the Hall sensor is fixed on the boss, the two wiring parts are respectively connected to two terminal terminals on the motor, and the PCB board assembly is electrically connected to the controller.

4. The seat belt retractor according to claim 3, characterized in that: The PCB board assembly is provided with a wiring harness interface for connecting to the controller, so that the PCB board assembly can receive the electrical signal of the sensor and transmit it to the controller.

5. The seat belt retractor according to claim 4, characterized in that: The sensor includes one or more of a seat back angle sensor, a seat cushion angle sensor, and a vehicle elevation angle sensor.

6. The seat belt retractor according to claim 2, characterized in that: The vehicle feel adjustment component also includes a motor bracket, which includes a fixing plate and a mounting plate vertically arranged on the fixing plate; a mounting groove is provided at the end of the mounting plate facing away from the fixing plate, and the mounting groove passes through the plate surface of the mounting plate so that the output shaft of the motor passes through the mounting groove; the motor is fixed on the mounting plate, and the fixing plate is installed on the bracket; a reinforcing plate connected to the mounting plate extends vertically on the fixing plate, and the reinforcing plate extends from the mounting plate in a direction perpendicular to the mounting plate and the width gradually decreases.

7. The seat belt retractor according to any one of claims 1 to 6, characterized in that: The vehicle sensing component and the vehicle sensing adjustment component are fixed to the bracket through a bracket connecting plate. The vehicle sensing component also includes a sensing base and a sensing bracket fixed on the bracket connecting plate. The sensing bracket includes two fixed arms fixed on the bracket connecting plate and a mounting portion located between the two fixed arms. The sensing base and the mounting portion are both provided with a pivot hole for the first rotating shaft to pass through. The vehicle sensing seat can be pivotally placed between the sensing base and the sensing bracket.

8. The seat belt retractor according to claim 7, characterized in that: The vehicle sensing assembly also includes a sensing body, a vehicle sensing arm and a swing arm. The sensing body is placed in the vehicle sensing seat. The vehicle sensing arm is rotatably covered on the top of the sensing body through a second rotating shaft installed on the vehicle sensing seat. The swing arm is rotatably covered on the top of the vehicle sensing arm through a third rotating shaft on the sensing base. The vehicle sensing arm is used to engage and lock with the locking plate. The first rotating shaft and the third rotating shaft are perpendicular to the surface of the bracket connecting plate, and the second rotating shaft is parallel to the surface of the bracket connecting plate.

9. The seat belt retractor according to claim 8, characterized in that: The contact portion where the swing arm contacts the vehicle sensing arm is extended on the swing arm along the displacement direction of the vehicle sensing arm.

10. The seat belt retractor according to claim 9, characterized in that: The contact portion is extended to have an extended portion in a direction away from the third rotating shaft, and the extended portion is bent toward the vehicle sensing arm.

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