A seatbelt retractor and a vehicle

Abstract

This application discloses a seatbelt retractor and a vehicle, relating to the field of vehicle technology, and aims to solve the problem of seatbelt mis-locking. The seatbelt retractor includes a mounting bracket, a first reel, and a second reel. The mounting bracket can cooperate with the first reel to lock the first reel. At least a portion of the second reel is sleeved on the first reel, and the second reel has at least a first state and a second state. When the second reel is in the first state, the second reel rotates synchronously with the first reel. When the second reel is in the second state, the second reel can rotate relative to the first reel.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a seat belt retractor and a vehicle. Background Technology

[0002] Existing seatbelt retractors have a vehicle-sensing locking function, which locks the seatbelt to protect occupants in the event of an emergency.

[0003] In some normal situations, such as when driving on a rugged mountain road with poor visibility ahead, the driver needs to get out of the car to check the road conditions before getting back in and driving away from the dangerous section of road.

[0004] However, because the vehicle was tilted on the rough road, the seat belt's vehicle-sensing locking function detected the abnormal vehicle posture, causing the retractor to lock and the seat belt to be unable to be pulled out, posing a safety hazard to subsequent driving. Summary of the Invention

[0005] The purpose of this application is to provide a seat belt retractor and vehicle, which aims to solve the problem of seat belt accidental locking.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, this application provides a seat belt retractor, which may include a mounting bracket, a first reel, and a second reel. The mounting bracket is capable of cooperating with the first reel to lock the first reel. At least a portion of the second reel is sleeved on the first reel, and the second reel has at least a first state and a second state. When the second reel is in the first state, the second reel rotates synchronously with the first reel. When the second reel is in the second state, the second reel is capable of rotating relative to the first reel.

[0008] In this way, if the vehicle is in complex road conditions, rather than encountering an accident, and the seat belt retractor is accidentally locked due to the vehicle's poor posture, the second reel can be adjusted from the first state to the second state, allowing the second reel to rotate relative to the first reel, thus releasing the locking state of the second reel. This allows the seat belt to be pulled out normally, enabling the seat belt to function properly and ensuring the personal safety of the vehicle occupants.

[0009] In some embodiments, a first engaging portion is provided on the second reel, and the seat belt retractor may further include a sliding member slidably disposed on the first reel. The sliding member has at least a first position and a second position. In the first position, the sliding member engages with the first engaging portion to place the second reel in a first state, thereby allowing the second reel to rotate synchronously with the first reel. In the second position, the sliding member disengages from the first engaging portion to place the second reel in a second state, thereby allowing the seat belt to be pulled out normally and releasing the seat belt from accidental locking.

[0010] In some embodiments, the slider can be slidably disposed along the axial direction of the first reel. This axial sliding of the slider allows it to switch between a first position and a second position, thereby enabling the seatbelt to be freely stretched or locked according to the occupant's needs, ensuring the seatbelt's normal function and thus guaranteeing the occupant's safety.

[0011] In some embodiments, the slider is sleeved on the first reel. Since the second reel is also sleeved on the first reel, the slider can engage and disengage with the first reel, thereby allowing the second reel to switch between a first state and a second state.

[0012] In some embodiments, a first limiting portion may be provided on the outer peripheral surface of the first spool, and a second limiting portion may be provided on the inner wall surface of the slider near the first spool. The first limiting portion and the second limiting portion cooperate to restrict the slider from rotating around the central axis of the first spool.

[0013] In this way, the slider can be prevented from rotating circumferentially relative to the first roller, that is, the slider can rotate synchronously with the first roller. Therefore, when the slider is engaged with the first mating part, the second roller can rotate synchronously with the slider, and thus can rotate synchronously with the first roller. When the slider is not disengaged from the first mating part, the second roller does not rotate synchronously with the slider, and can rotate independently relative to the first roller.

[0014] In some embodiments, the first limiting portion may include one of a spline and a spline groove, and the second limiting portion may include the other of a spline and a spline groove.

[0015] The spline and spline groove work together to limit the movement of the slider and the first spool in the circumferential direction, thus enabling the slider and the first spool to move synchronously. Because the spline and spline groove transmit torque through the meshing of the key teeth, and the spline has more key teeth and a larger contact area, the spline has a better load-bearing capacity and more uniform motion transmission.

[0016] In some embodiments, a second mating part is provided on the side of the slider near the second reel, and when the slider is in the first position, the second mating part can engage with the first mating part.

[0017] When the second mating part mates with the first mating part, the second roller and the sliding member can rotate synchronously, thereby making the second roller and the first roller rotate synchronously.

[0018] In some embodiments, the first mating portion may include either a protrusion or a groove, and the second mating portion may include either a protrusion or a groove.

[0019] In this way, the protrusion and the groove cooperate to allow the slider to engage with the second scroll, thereby enabling the slider and the second scroll to rotate synchronously.

[0020] In some embodiments, a plurality of protrusions are provided, and the plurality of protrusions are spaced apart around the central axis of the first reel.

[0021] This allows for a more complete fit between the first and second mating parts, increases the contact area between them, and makes the force distribution more uniform, thereby improving the transmission efficiency of the sliding part to the second roller and preventing excessive force concentration from causing the protrusion to break.

[0022] In some embodiments, the seatbelt retractor may further include a first limiting member and a second limiting member spaced apart on a first reel, with the second reel disposed between the first limiting member and the second limiting member.

[0023] The arrangement direction of the first and second limiting members is consistent with the direction of the central axis of the first scroll. The second scroll is disposed between the first and second limiting members, which can restrict the second scroll from moving along the axial direction of the first scroll, thereby preventing the second scroll from sliding with the sliding member and causing the first and second limiting parts to be unable to disengage.

[0024] In some embodiments, the second reel further includes a fixing portion for securing one end of the seat belt. Thus, the fixing portion secures one end of the seat belt and allows the seat belt to be wound onto the second reel for easy pulling out or retracting.

[0025] In some embodiments, the seatbelt retractor may further include an elastic element that elastically supports a slider to position the slider in a first position.

[0026] One end of the elastic element is connected to the first spool, and the other end is connected to the end of the slider that is away from the second spool. When the slider is in the first position, the elastic element can provide elastic support to the slider so that the first mating part and the second mating part can engage, thereby driving the second spool to move synchronously with the first spool. When the slider is in the second position, the elastic element is compressed, causing the first mating part and the second mating part to disengage, thereby allowing the second spool to rotate independently relative to the first spool.

[0027] In some embodiments, the seat belt retractor may further include a force-bearing member, and the sliding member is provided with a mounting groove, the force-bearing member being sleeved in the mounting groove.

[0028] In this way, a force can be applied to the force-bearing member along the axial direction of the first spool, pointing from the sliding member to the elastic member. The force-bearing member is fitted into the mounting groove of the sliding member, thereby allowing the force-bearing member to move to the second position, disengaging the first mating part from the second mating part, and thus allowing the second spool to rotate independently.

[0029] In some embodiments, the seatbelt retractor may further include a guide rail connected to the mounting bracket, the guide rail extending axially along the first reel, and at least a portion of the force-bearing member disposed within the guide rail.

[0030] In this way, the guide rail can guide the movement of the force-bearing component, preventing the component from rotating or jamming due to uneven force, thus allowing the sliding component to slide smoothly along the axial direction of the first roller.

[0031] In some embodiments, the seatbelt retractor may further include a pull cord, one end of which is connected to a force-receiving component. When the pull cord is pulled, it transmits the force to the force-receiving component, causing the force-receiving component to drive a sliding component to slide axially, placing the second reel in a second state, releasing the seatbelt from its locked state, and ensuring the seatbelt's normal tension.

[0032] In some embodiments, the seatbelt retractor may further include a pull ring connected to the other end of the pull cord. Pulling the pull ring moves the pull cord, which in turn moves the slider, making it easier for the occupant to pull the cord.

[0033] In some embodiments, the seatbelt retractor may further include a pulley disposed on a guide rail, with at least a portion of the pull rope connected to the pulley to change the direction of the force on the pull rope. This allows the direction of the pull rope to be unaffected by the sliding direction of the sliding element, facilitating installation and pulling.

[0034] Secondly, embodiments of this application also provide a vehicle that may include the aforementioned seatbelt retractor. It should be noted that the technical effects of the implementation in the second aspect are all analogous to the technical effects of the corresponding implementation in the first aspect, and will not be repeated here.

[0035] In some embodiments, the vehicle may also include a seatbelt, one end of which is connected to a fixing part, and at least a portion of the seatbelt is wound around a second reel. This allows the seatbelt to be pulled out or tightened as the second reel rotates, thereby ensuring the safety of the occupants.

[0036] In some embodiments, the vehicle may further include a vehicle body, a seat belt retractor disposed within the vehicle body, a first outlet and a second outlet provided on the vehicle body, at least a portion of the seat belt extending out of the first outlet, and at least a portion of the pull cord extending out of the second outlet and connected to a pull ring.

[0037] Pulling the seatbelt extending from the vehicle body will cause the second reel to rotate. Pulling the pull rope extending from the vehicle body will cause the sliding component to slide along the axis of the first reel. In this way, by pulling the pull rope and the seatbelt, the second reel can be in either the first or second state, thereby ensuring that the seatbelt functions properly and ensuring the personal safety of the occupants. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the structure of a seat belt retractor provided in an embodiment of this application;

[0040] Figure 2 for Figure 1 An exploded view of the seatbelt retractor shown.

[0041] Figure 3 A schematic diagram of the structure in the first state of the second scroll;

[0042] Figure 4 A schematic diagram of the second scroll in the second state;

[0043] Figure 5 This is an internal structure diagram of a vehicle provided in an embodiment of this application.

[0044] Reference numerals: 100, seatbelt retractor;

[0045] 1. Mounting bracket; 11. Third support part; 11a. Third support hole; 12. First support part; 12a. First support hole; 13. Second support part; 13a. Second support hole; 2. First reel; 21a. First damping disc; 21b. Second damping disc; 22. Spline; 23a. First limiting member; 23b. Second limiting member; 3. Second reel; 31. Mounting hole; 32. Fixing part; 33. First mating part; 4. Sliding member; 41. Second mating part; 42. Mounting groove; 43. Spline groove; 5. Force-bearing member; 6. Guide rail; 7. Elastic member; 8. Second outlet; 9. First outlet; 10. Safety belt. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or relative positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Unless otherwise specified, the above-described orientation can be flexibly set in practical applications, provided that the relative positional relationship shown in the accompanying drawings is satisfied.

[0048] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0049] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "communication" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a communication between the internal components of two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] In embodiments of the invention, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0051] In embodiments of the present invention, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in embodiments of the present invention should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0052] Existing seat belt retractors have a vehicle-sensing locking function. In the event of an emergency, the retractor locks the seat belt to protect the occupants. However, under normal circumstances, the locking function may be accidentally triggered, causing the seat belt to be locked under normal conditions and unable to be pulled out.

[0053] In off-road scenarios, vehicles often need to ascend and descend steep slopes. Due to the rugged and uneven terrain and the presence of rocks, vehicles often get stuck in deep ruts, become trapped in rocky conditions, or have limited visibility ahead. In such cases, passengers need to get out of the vehicle to check the road conditions or remove obstacles.

[0054] When occupants return to the vehicle to continue driving, the seatbelt's vehicle-sensing locking function is triggered due to the vehicle's high tilt. This locks the seatbelt retractor, preventing the seatbelt reel from rotating and thus preventing it from being pulled out. Off-road activities are intense and dangerous; in such scenarios, occupants' lives cannot be guaranteed if they are not properly secured with seatbelts.

[0055] Based on this, this application provides a seat belt retractor. By setting a second reel, when the seat belt locking function is accidentally activated, the second reel can rotate normally, thereby ensuring that the seat belt can be pulled out normally, reducing safety hazards and protecting the life safety of occupants.

[0056] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a seatbelt retractor 100 provided in an embodiment of this application. Figure 2 for Figure 1 The exploded view shown is of a seat belt retractor 100, which may include a mounting bracket 1 and a first reel 2. The mounting bracket 1 can cooperate with the first reel 2 to realize the locking function of the seat belt.

[0057] The mounting bracket 1 may include a first support portion 12 and a second support portion 13 spaced apart. The first support portion 12 is provided with a first support hole 12a, and the second support portion 13 is provided with a second support hole 13a. At least a portion of the first reel 2 is disposed in the first support hole 12a and the second support hole 13a, so that the first reel 2 can rotate around the central axis, thereby allowing the seat belt to be pulled out.

[0058] The inner surface of the first support hole 12a has a first internal tooth along the circumferential direction, and the inner surface of the second support hole 13a has a second internal tooth along the circumferential direction. The first spool 2 may include a first damping disc 21a and a second damping disc 21b, which are respectively disposed at both ends of the first spool 2. The first damping disc 21a is engaged with the first internal tooth, and the second damping disc 21b is engaged with the second internal tooth. A locking structure is provided inside the first damping disc 21a and the second damping disc 21b. In this way, the first damping disc 21a and the second damping disc 21b cooperate with the mounting bracket 1 to realize the locking function of the seat belt.

[0059] In the embodiments of this application, when the vehicle is tilted, the small balls in the first damping disc 21a and the second damping disc 21b are subjected to gravity, pushing up the ball cover plate. This causes the pawl on the ball cover plate to extend into the ratchet and lock the ratchet, thus causing the first damping disc 21a and the second damping disc 21b to lock into the internal teeth on the mounting bracket 1, preventing the first reel 2 from rotating and thus preventing the seat belt from being pulled out. When the vehicle accelerates forward or backward, the small balls in the first damping disc 21a and the second damping disc 21b are subjected to acceleration, which can also push up the ball cover plate, triggering the locking function, and the seat belt will also be unable to be pulled out.

[0060] In embodiments of this application, the seatbelt retractor 100 may further include a second reel 3, at least a portion of which is sleeved on the first reel 2, and the second reel 3 has at least a first state and a second state.

[0061] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of the second scroll 3 in the first state. When the second scroll 3 is in the first state, the second scroll 3 rotates synchronously with the first scroll 2.

[0062] In this way, when the vehicle is being driven normally, neither the first reel 2 nor the second reel 3 is locked, and the seat belt can be pulled out normally. When the vehicle encounters an emergency, such as a collision or rollover, the locking mechanism on the first reel 2 is triggered, and the first reel 2 is locked. Since the second reel 3 rotates synchronously with the first reel 2, the second reel 3 is also locked, and the seat belt cannot be pulled out. This prevents the occupant from being thrown out of the seat due to inertia or gravity, and reduces accidental injury or death of the occupant.

[0063] Please refer to Figure 4 , Figure 4 This is a schematic diagram of the second scroll 3 in the second state. When the second scroll 3 is in the second state, the second scroll 3 can rotate relative to the first scroll 2.

[0064] In this way, if the vehicle is in a complex road condition, rather than encountering an accident, and the seat belt retractor 100 is accidentally locked due to the vehicle's poor posture, the second reel 3 can be adjusted from the first state to the second state, so that the second reel 3 can rotate relative to the first reel 2, thereby releasing the locking state of the second reel 3, so that the seat belt can be pulled out normally, and thus the seat belt can function normally, ensuring the personal safety of the vehicle occupants.

[0065] Please refer to Figures 1-4 In some embodiments of this application, a first mating part 33 may be provided on the second reel 3, and the seat belt retractor 100 may also include a sliding member 4 slidably disposed on the first reel 2, the sliding member 4 having at least a first position and a second position.

[0066] Please refer to Figure 2 and Figure 3 In the first position, the slider 4 can engage with the first mating part 33 to make the second spool 3 be in the first state, so that the second spool 3 can rotate synchronously with the first spool 2.

[0067] Please refer to Figure 2 and Figure 4 In the second position, the slider 4 disengages from the first mating part 33, so that the second reel 3 is in the second state, thereby allowing the second reel 3 to rotate relative to the first reel 2, and thus allowing the seat belt to be pulled out normally, releasing the situation of the seat belt being accidentally locked.

[0068] Please refer to Figures 1-4 In some embodiments of this application, the slider 4 can be slidably disposed along the axial direction of the first reel 2. In this way, by sliding the slider 4 axially, the slider 4 can be switched between a first position and a second position, thereby allowing the seat belt to be freely stretched or locked according to the needs of the occupant, ensuring the normal function of the seat belt, and thus ensuring the safety of the occupant.

[0069] In some embodiments of this application, the slider 4 is sleeved on the first scroll 2. Since the second scroll 3 is also sleeved on the first scroll 2, the slider 4 can engage and disengage with the first scroll 2, thereby enabling the second scroll 3 to switch between a first state and a second state.

[0070] In some embodiments of this application, a first limiting part may be provided on the outer peripheral surface of the first spool 2, and a second limiting part may be provided on the inner wall surface of the slider 4 near the first spool 2. The first limiting part and the second limiting part cooperate to restrict the slider 4 from rotating around the central axis of the first spool 2.

[0071] In this way, the sliding member 4 can be prevented from rotating circumferentially relative to the first roller 2, that is, the sliding member 4 can rotate synchronously with the first roller 2. Therefore, when the sliding member 4 is engaged with the first mating part 33, the second roller 3 can rotate synchronously with the sliding member 4, and thus can rotate synchronously with the first roller 2. When the sliding member 4 is not disengaged from the first mating part, the second roller 3 does not rotate synchronously with the sliding member 4, and can rotate independently relative to the first roller 2.

[0072] In some embodiments of this application, the first limiting part may include one of the spline 22 and the spline groove 43 that cooperate with each other, and the second limiting part may include the other of the spline 22 and the spline groove 43.

[0073] The spline 22 and spline groove 43 work together to limit the movement of the slider 4 and the first scroll 2 in the circumferential direction, thus enabling the slider 4 and the first scroll 2 to move synchronously. Since the spline 22 and spline groove 43 transmit torque through the meshing of the key teeth, the spline 22 has more key teeth and a larger contact area, which makes the spline 22 have better load-bearing capacity and more uniform motion transmission.

[0074] In addition, since the extension direction of the spline 22 teeth is consistent with the axial direction of the first spool 2, the spline 22 and the spline groove 43 can guide the slider 4, so that the slider 4 can slide linearly along the axial direction of the first spool 2.

[0075] In some embodiments of this application, a second engaging portion 41 may be provided on the side of the slider 4 near the second reel 3. When the slider 4 is in the first position, the second engaging portion 41 can engage with the first engaging portion 33. The engagement of the second engaging portion 41 with the first engaging portion 33 can cause the second reel 3 and the slider 4 to rotate synchronously, thereby causing the second reel 3 and the first reel 2 to rotate synchronously.

[0076] In some embodiments of this application, the first mating part 33 may include either a protrusion or a groove, and the second mating part 41 may include either a protrusion or a groove.

[0077] In this way, the protrusion and the groove cooperate to allow the slider 4 to cooperate with the second roller 3, thereby allowing the slider 4 and the second roller 3 to rotate synchronously.

[0078] In some embodiments of this application, multiple protrusions and grooves are provided, and the multiple protrusions are spaced apart around the central axis of the first scroll 2.

[0079] This allows for a more complete fit between the first mating part 33 and the second mating part 41, increasing the contact area between them and making the force distribution more uniform. This improves the transmission efficiency of the sliding member 4 to the second roller 3 and prevents excessive force concentration from causing the protrusion to break.

[0080] In some embodiments of this application, the seat belt retractor 100 may further include a first limiting member 23a and a second limiting member 23b spaced apart on the first reel 2, and a second reel 3 disposed between the first limiting member 23a and the second limiting member 23b.

[0081] The arrangement direction of the first limiting member 23a and the second limiting member 23b is consistent with the direction of the central axis of the first scroll 2. The second scroll 3 is disposed between the first limiting member 23a and the second limiting member 23b, which can restrict the second scroll 3 from moving along the axial direction of the first scroll 2, thereby preventing the second scroll 3 from sliding with the sliding member 4 and causing the first limiting part and the second limiting part to be unable to disengage.

[0082] In some embodiments of this application, the second reel 3 may further include a fixing part 32 for fixing one end of the seat belt. Thus, the fixing part 32 can fix one end of the seat belt and allow the seat belt to be wound around the second reel 3 for easy pulling out or retracting.

[0083] In some embodiments, the second reel 3 may further include a mounting hole 31 spaced apart from the fixing portion 32, the mounting hole 31 being used for extending the seat belt.

[0084] In this way, one end of the seat belt can be fixed to the fixing part 32 and pass through the mounting hole 31, so that the seat belt can be wound on the second reel 3. When the second reel 3 rotates, the seat belt can be pulled out or retracted. In addition, the fixing part 32 and the mounting hole 31 are spaced apart to ensure the effective length of the seat belt mounting position and prevent the seat belt from falling off due to the installation length being too short, thus failing to effectively guarantee the seat belt's performance.

[0085] In some embodiments, the mounting bracket 1 may include a third support portion 11, which may be disposed between the first support portion 12 and the second support portion 13. The third support portion 11 is provided with a third support hole 11a for supporting the second spool 3.

[0086] The seat belt is wound around the second spool 3 and is located between the third support part 11 and the second support part 13. In this way, the third support part 11 can limit the seat belt and prevent it from shifting during the pulling process, thus preventing it from interfering with other components.

[0087] In some embodiments, the gap between the third support portion 11 and the second support portion 13 can be 4.8mm, 5mm or 5.2mm, which can be set according to the width of the seat belt. This application does not further limit this.

[0088] In some embodiments of this application, the seatbelt retractor 100 may further include an elastic element 7 that elastically supports the slider 4 so that the slider 4 is in a first position.

[0089] One end of the elastic element 7 is connected to the first spool 2, and the other end is connected to the end of the slider 4 away from the second spool 3. When the slider 4 is in the first position, the elastic element 7 can provide elastic support to the slider 4 so that the first mating part 33 and the second mating part 41 can engage, thereby driving the second spool 3 to move synchronously with the first spool 2. When the slider 4 is in the second position, the elastic element 7 is compressed, so that the first mating part 33 and the second mating part 41 can disengage, thereby allowing the second spool 3 to rotate independently relative to the first spool 2.

[0090] In some embodiments, the elastic element 7 may be a spring, rubber, or sponge, and this application does not further limit it.

[0091] In order to compress the elastic element 7, the first mating part 33 and the second mating part 41 are disengaged. In some embodiments of this application, the seat belt retractor 100 may also include a force-bearing element 5, and the sliding member 4 is provided with a mounting groove 42, and the force-bearing element 5 is sleeved in the mounting groove 42.

[0092] In this way, a force can be applied to the force-bearing member 5 along the axial direction of the first spool 2, pointing from the sliding member 4 to the elastic member 7. The force-bearing member 5 is fitted in the mounting groove 42 of the sliding member 4, so that the force-bearing member 5 can be moved to the second position, the first mating part 33 disengages from the second mating part 41, and thus the second spool 3 can rotate independently.

[0093] In some embodiments of this application, the seat belt retractor 100 may further include a guide rail 6 connected to the mounting bracket 1, the guide rail 6 extending axially along the first reel 2, and at least a portion of the force-bearing member 5 disposed within the guide rail 6.

[0094] In this way, the guide rail 6 can guide the movement of the force-bearing component 5, preventing the force-bearing component 5 from rotating or jamming due to uneven force, so that the sliding component 4 can slide smoothly along the axial direction of the first roller 2.

[0095] In some embodiments, multiple guide rails 6 can be provided. For example, two, three, or four guide rails 6 can be provided. Multiple guide rails 6 are evenly spaced along the circumferential direction of the slider 4, which can ensure that the force-bearing component 5 is subjected to force evenly and reduce the risk of breakage of the force-bearing component 5.

[0096] In the embodiments of this application, the force-bearing member 5 can rotate around the axis of the first spool 2 in the mounting groove 42. Since at least a portion of the force-bearing member 5 is connected to the guide rail 6, which is fixedly connected to the mounting frame 1, the force-bearing member 5 will not rotate relative to the mounting frame 1. The sliding member 4 rotates synchronously with the first spool 2. The force-bearing member 5 can rotate in the mounting groove 42, which can ensure the smooth rotation of the sliding member 4 without being interfered with by the guide rail 6.

[0097] In some embodiments of this application, the seatbelt retractor 100 may further include a pull cord, one end of which is connected to the force-bearing member 5.

[0098] In this way, when the pull rope is pulled, the pull rope can transmit the force received to the force-receiving component 5, so that the force-receiving component 5 can drive the sliding component 4 to slide along the axis, so that the second reel 3 is in the second state, releasing the locking state of the safety belt and ensuring the normal stretching of the safety belt.

[0099] In some embodiments of this application, the seatbelt retractor 100 may further include a pull ring connected to the other end of the pull rope. In this way, pulling the pull ring moves the pull rope, which in turn moves the slider 4. This pull ring makes it more convenient for the occupant to pull the pull rope.

[0100] In some embodiments of this application, a fixed pulley is fixedly provided at one end of the guide rail 6 near the pull rope, and at least a portion of the pull rope is connected to the fixed pulley, thereby changing the direction of the force on the pull rope and making it easier to pull.

[0101] This application also provides a vehicle that may include the aforementioned seatbelt retractor 100.

[0102] Please refer to Figure 5 , Figure 5 This is an internal structural diagram of a vehicle provided in an embodiment of this application. In some embodiments of this application, the vehicle may further include a seat belt 10, one end of which is connected to a fixing part 32, and at least a portion of the seat belt 10 is wound around a second reel 3.

[0103] In this way, the seat belt 10 can be pulled out or tightened as the second reel 3 rotates. That is, when the second reel 3 is in the first state, the seat belt 10 can be pulled out or tightened as the first reel 2 rotates. In an emergency, the locking mechanism is triggered, the first reel 2 is locked, and the second reel cannot rotate, thereby locking the seat belt 10 and preventing the occupant from being thrown out due to an accident. When the seat belt 10 is accidentally locked, pulling the pull ring can move the sliding member 4 away from the second reel 3, so that the second reel 3 is in the second state, thereby allowing the second reel 3 to rotate independently relative to the first reel 2, thereby pulling out or tightening the seat belt 10.

[0104] In some embodiments of this application, the vehicle may further include a vehicle body, a seat belt retractor 100 disposed in the vehicle body, a first outlet 9 and a second outlet 8 provided on the vehicle body, at least a portion of the seat belt 10 extending out of the first outlet 9, and at least a portion of the pull rope extending out of the second outlet 8 and connected to the pull ring.

[0105] Pulling the seat belt 10 extending from the vehicle body can rotate the second reel 3. Pulling the pull rope extending from the vehicle body can cause the sliding member 4 to slide along the axis of the first reel 2. In this way, by pulling the pull rope and the seat belt 10, the second reel 3 can be in the first state or the second state, thereby ensuring that the seat belt 10 functions properly and ensuring the personal safety of the occupants inside the vehicle.

[0106] Since the elastic element 7 is used to elastically support the sliding element 4 in the first state, which is the normal state of the seat belt retractor 100, in order to prevent the sliding element 4 from disengaging from the first state when the pull rope is not pulled, the elastic element 7 has a large elastic support force on the sliding element 4. Therefore, the occupant needs to apply a large force to the pull rope to make the sliding element 4 in the second position, even if the second reel 3 is in the second state.

[0107] Therefore, in some embodiments of this application, at least one movable pulley can be provided between the second outlet 8 and the fixed pulley. The movable pulley and the fixed pulley constitute a pulley group. By changing the winding method of the pull rope on the pulley group, the magnitude of the force required to pull the sliding member 4 can be changed. The number of movable pulleys and the winding method of the pull rope can be set according to the elastic force of the elastic member 7. This application does not further limit this.

[0108] In some embodiments of this application, a spring disc is provided on the side of the second outlet 8 near the interior of the vehicle body, and at least a portion of the pull rope is disposed within the spring disc. When the pull ring is pulled, the pull rope can be pulled out from the spring disc, transmitting the pulling force to the slider 4. When the pull ring is released, the pull rope retracts into the spring disc.

[0109] In some embodiments of this application, a limiting device is provided on the pull rope. This limiting device is connected between the coil spring disc and the pulley block, and the minimum width of the limiting device is greater than the width of the notch on the coil spring disc. The limiting device can move with the movement of the pull rope. When the first mating part 33 and the second mating part 41 disengage and the gap between the first mating part 33 and the second mating part 41 is greater than or equal to 0.5 mm, for example, when the gap between the first mating part 33 and the second mating part 41 is 0.5 mm, 0.8 mm, or 1 mm, the limiting device abuts against the coil spring disc, and the pull rope cannot continue to be pulled outward. This can remind the occupant that the second reel 3 has been unlocked and there is no need to continue pulling.

[0110] In some embodiments of this application, when the sliding tooth is in the first position, the pull cord is marked with a first scale at the protrusion of the second outlet 8 to remind the occupant that the second reel 3 is in the first state; when the sliding tooth is in the second position, the pull cord is marked with a second scale at the protrusion of the second outlet 8 to remind the occupant that the second reel 3 is in the second state. The occupant uses the first and second scales to determine whether the second reel 3 is unlocked or restored to a state synchronized with the first reel 2.

[0111] After the second reel 3 is unlocked (i.e., in the second state), and the seatbelt 10 is pulled out and fastened, the second reel 3 needs to be returned to the first state. During this process, the protrusions of the first mating part 33 and the second mating part 41 may not align with the grooves, preventing them from engaging properly. In this case, simultaneously pulling the pull ring and the seatbelt 10 will rotate the second shaft by a small angle, aligning the protrusions with the grooves. Releasing the seatbelt 10 and the pull ring will allow the first mating part 33 to engage with the second mating part 41, enabling the second reel 3 to rotate synchronously with the first reel 2. This allows the seatbelt 10 to lock properly in case of an accident, protecting the occupant's safety.

[0112] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0113] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A seatbelt retractor, characterized in that, It includes a mounting bracket (1), a first reel (2), a second reel (3), and a sliding member (4) slidably disposed on the first reel (2). The mounting bracket (1) can cooperate with the first reel (2) to lock the first reel (2). At least a portion of the second spool (3) is fitted onto the first spool (2), and the second spool (3) is provided with a first mating part (33). The second scroll (3) has at least a first state and a second state, and the slider (4) has at least a first position and a second position; When the slider (4) is in the first position, the slider (4) cooperates with the first mating part (33) so that the second scroll (3) is in the first state. When the second scroll (3) is in the first state, the second scroll (3) rotates synchronously with the first scroll (2). When the slider (4) is in the second position, the slider (4) disengages from the first mating part (33) so that the second spool (3) is in the second state. When the second spool (3) is in the second state, the second spool (3) can rotate relative to the first spool (2).

2. The seatbelt retractor according to claim 1, characterized in that, The slider (4) is slidably disposed along the axial direction of the first scroll (2).

3. The seatbelt retractor according to claim 1 or 2, characterized in that, The sliding member (4) is sleeved on the first scroll (2).

4. The seatbelt retractor according to claim 3, characterized in that, A first limiting part is provided on the outer peripheral surface of the first scroll (2), and a second limiting part is provided on the inner wall surface of the sliding member (4) near the first scroll (2). The first limiting part and the second limiting part cooperate to restrict the sliding member (4) from rotating around the central axis of the first scroll (2).

5. The seatbelt retractor according to claim 4, characterized in that, The first limiting part includes one of a spline (22) and a spline groove (43), and the second limiting part includes the other of a spline (22) and the spline groove (43).

6. The seatbelt retractor according to claim 1 or 2, characterized in that, The slider (4) is provided with a second mating part (41) on the side near the second scroll (3). When the slider (4) is in the first position, the second mating part (41) can cooperate with the first mating part (33).

7. The seatbelt retractor according to claim 6, characterized in that, The first mating part (33) includes either a protrusion or a groove, and the second mating part (41) includes either the protrusion or the groove.

8. The seatbelt retractor according to claim 7, characterized in that, The protrusions are provided in multiple ways, and the multiple protrusions are spaced apart around the central axis of the first scroll (2).

9. The seatbelt retractor according to claim 1 or 2, characterized in that, It also includes a first limiting member (23a) and a second limiting member (23b) spaced apart on the first scroll (2), and the second scroll (3) is disposed between the first limiting member (23a) and the second limiting member (23b).

10. The seatbelt retractor according to claim 1 or 2, characterized in that, The second reel (3) also includes a fixing part (32) for fixing one end of the seat belt (10).

11. The seatbelt retractor according to claim 1 or 2, characterized in that, It also includes an elastic element (7) that elastically supports the slider (4) so ​​that the slider (4) is located in the first position.

12. The seatbelt retractor according to claim 1 or 2, characterized in that, It also includes a force-bearing component (5), and the sliding component (4) is provided with an installation groove (42), and the force-bearing component (5) is sleeved in the installation groove (42).

13. The seatbelt retractor according to claim 12, characterized in that, It also includes a guide rail (6) connected to the mounting bracket (1), the guide rail (6) extending axially along the first reel (2), and at least a portion of the force-bearing member (5) being disposed within the guide rail (6).

14. The seatbelt retractor according to claim 13, characterized in that, It also includes a pull rope, one end of which is connected to the force-bearing component (5).

15. The seatbelt retractor according to claim 14, characterized in that, It also includes a pull ring, which is connected to the other end of the pull rope.

16. The seatbelt retractor according to claim 15, characterized in that, It also includes a pulley disposed on the guide rail (6), at least a portion of the pull rope being connected to the pulley to change the direction of the force on the pull rope.

17. A vehicle, characterized in that, Includes the seat belt retractor (100) as described in any one of claims 1-16 above.

18. The vehicle according to claim 17, characterized in that, It also includes a seat belt (10), one end of which is connected to the fixing part (32), and at least a portion of which is wound around the second reel (3).

19. The vehicle according to claim 18, characterized in that, It also includes a vehicle body, the seat belt retractor (100) is disposed in the vehicle body, the vehicle body is provided with a first outlet (9) and a second outlet (8), at least a portion of the seat belt (10) extends out of the first outlet (9), and at least a portion of the pull rope extends out of the second outlet (8) and is connected to the pull ring.

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