Safety belt retractor and vehicle

Abstract

The invention discloses a safety belt retractor and a vehicle, relates to the technical field of vehicles, and aims to solve the problem that a safety belt is locked by mistake. The safety belt retractor comprises a mounting frame, a first reel and a second reel, the mounting frame can be matched with the first reel to lock the first reel, at least part of the second reel is arranged on the first reel in a sleeving mode, the second reel at least has a first state and a second state, and when the second reel is in the first state, the second reel is in the second state. And when the second reel is in the first state, the second reel and the first reel rotate synchronously, and when the second reel is in the second state, the second reel can rotate relative to the first reel.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a seat belt retractor and a vehicle. Background Art

[0002] The existing seat belt retractor has a vehicle-sensing locking function. When the vehicle encounters an emergency, the retractor locks the seat belt to protect the occupants.

[0003] In some normal situations, such as when a vehicle is driving on a rugged mountain road with unclear vision ahead, the driver needs to get out of the vehicle to check the road conditions and then get back in to drive away from the dangerous section.

[0004] However, as the vehicle was tilted on a rough road, the seat belt's vehicle-sensing locking function detected an abnormal vehicle posture, causing the retractor to be locked 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 the present application is to provide a seat belt retractor and a vehicle, aiming to solve the problem of mis-locking of the seat belt.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme:

[0007] In a first aspect, the present application provides a seat belt retractor, which may include a mounting frame, a first reel and a second reel, wherein the mounting frame 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, and when the second reel is in the second state, the second reel can rotate relative to the first reel.

[0008] In this way, if the vehicle is in a complex road condition but not in an accident, and the seat belt retractor is mistakenly locked due to the poor posture of the vehicle, the second reel can be adjusted from the first state to the second state, so that the second reel can rotate relative to the first reel, thereby releasing the locked state of the second reel, so that the seat belt can be pulled out normally, and the seat belt can function normally to ensure the personal safety of the vehicle occupants.

[0009] In some embodiments, a first matching portion is provided on the second reel, and the seat belt retractor may also include a sliding member slidably provided on the first reel, the sliding member having at least a first position and a second position. When in the first position, the sliding member cooperates with the first matching portion so that the second reel is in a first state, thereby enabling the second reel to rotate synchronously with the first reel; when in the second position, the sliding member disengages from the first matching portion so that the second reel is in a second state, thereby enabling the seat belt to be pulled out normally, thereby resolving the situation where the seat belt is accidentally locked.

[0010] In some embodiments, the sliding member can be slidably arranged along the axial direction of the first reel. In this way, the sliding member can be switched between the first position and the second position by axially sliding the sliding member, so that the safety belt can be freely stretched or locked according to the needs of the occupant, thereby ensuring the normal function of the safety belt and further ensuring the safety of the occupant.

[0011] In some embodiments, the sliding member is sleeved on the first reel. Since the second reel is also sleeved on the first reel, the sliding member can be matched and disengaged from the first reel, so that the second reel can switch between the first state and the second state.

[0012] In some embodiments, a first limiting portion may be provided on the outer circumferential surface of the first reel, and a second limiting portion may be provided on the inner wall surface of the sliding member close to the first reel. The first limiting portion cooperates with the second limiting portion to limit the sliding member from rotating around the central axis direction of the first reel.

[0013] In this way, the sliding member can be prevented from circumferentially rotating relative to the first scroll, that is, the sliding member can be made to rotate synchronously with the first scroll. Therefore, when the sliding member is engaged with the first matching part, the second scroll can rotate synchronously with the sliding member, and thus can rotate synchronously with the first scroll; when the sliding member is not disengaged from the first matching part, the second scroll does not rotate synchronously with the sliding member and can rotate independently relative to the first scroll.

[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 the spline and the spline groove.

[0015] The spline and the spline groove cooperate with each other to achieve the circumferential limit between the sliding member and the first reel, so that the sliding member and the first reel move synchronously. Since the spline and the spline groove transmit torque through the meshing between the key teeth, the spline has more key teeth and a larger contact area, so that the spline has a better load-bearing capacity and more uniform motion transmission.

[0016] In some embodiments, a second matching portion is disposed on a side of the sliding member close to the second reel, and when the sliding member is located at the first position, the second matching portion can match with the first matching portion.

[0017] When the second matching portion matches with the first matching portion, the second reel and the sliding member can be rotated synchronously, thereby making the second reel and the first reel rotate synchronously.

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

[0019] In this way, the protrusion cooperates with the groove, so that the sliding member cooperates with the second reel, thereby making the sliding member and the second reel 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] In this way, the first matching part and the second matching part can be more fully matched, the contact area between the first matching part and the second matching part is increased, and the force distribution can be more uniform, thereby improving the transmission efficiency of the sliding part to the second reel and preventing the protrusion from breaking due to excessive force concentration.

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

[0023] The arrangement direction of the first limit member and the second limit member is consistent with the central axis direction of the first scroll. The second scroll is arranged between the first limit member and the second limit member, which can limit the axial movement of the second scroll along the first scroll, thereby preventing the second scroll from sliding with the sliding member and causing the first limit part and the second limit part to be unable to disengage.

[0024] In certain embodiments, the second reel further comprises a fixing portion, which is used to fix one end of the safety belt. In this way, the fixing portion can fix one end of the safety belt and allow the safety belt to be wound around the second reel for easy pulling out or stowing.

[0025] In some embodiments, the seat belt retractor may further include an elastic member, wherein the elastic member elastically supports the sliding member so that the sliding member is located in the first position.

[0026] One end of the elastic member is connected to the first scroll, and the other end is connected to an end of the sliding member away from the second scroll. When the sliding member is in the first position, the elastic member can provide elastic support to the sliding member so that the first matching portion cooperates with the second matching portion, thereby driving the second scroll and the first scroll to move synchronously; when the sliding member is in the second position, the elastic member is compressed, so that the first matching portion is disengaged from the second matching portion, thereby allowing the second scroll to rotate independently relative to the first scroll.

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

[0028] In this way, a force directed from the sliding member to the elastic member can be applied to the force-bearing member along the axial direction of the first reel. The force-bearing member is sleeved in the mounting groove of the sliding member, so that the force-bearing member can be moved to the second position, the first matching part is disengaged from the second matching part, and the second reel rotates independently.

[0029] In some embodiments, the seat belt retractor may further include a guide rail connected to the mounting frame, the guide rail extending along the axial direction of the first reel, and at least a portion of the force-bearing member is disposed in the guide rail.

[0030] In this way, the guide rail can guide the movement of the force-bearing member, preventing the force-bearing member from rotating or moving jamming due to uneven force, so that the sliding member can slide smoothly along the axial direction of the first reel.

[0031] In some embodiments, the seat belt retractor may further include a pull rope, one end of which is connected to the force-bearing member. Thus, when the pull rope is pulled, the pull rope can transmit the force received to the force-bearing member, so that the force-bearing member drives the sliding member to slide axially, so that the second reel is in the second state, the locking state of the seat belt is released, and the normal tension of the seat belt is ensured.

[0032] In some embodiments, the safety belt retractor may further include a pull ring, which is connected to the other end of the draw cord. In this way, pulling the pull ring can drive the draw cord to move, thereby driving the sliding member to move. The pull ring is provided to make it more convenient for the occupant to pull the draw cord.

[0033] In some embodiments, the safety belt retractor may further include a pulley disposed on the guide rail, and at least a portion of the pull rope is connected to the pulley to change the direction of the force on the pull rope. In this way, the direction of the pull rope is not affected by the sliding direction of the sliding member, which is convenient for installation and pulling.

[0034] In a second aspect, the embodiment of the present application further provides a vehicle, which may include the above-mentioned seat belt retractor. It should be noted that the technical effects brought about by the implementation of the second aspect can all refer to the technical effects brought about by the corresponding implementation of the first aspect, and will not be repeated here.

[0035] In some embodiments, the vehicle may further include a safety belt, one end of which is connected to the fixing portion, and at least a portion of the safety belt is wound around the second reel, so that the safety belt can be pulled out or tightened following the rotation of the second reel, thereby ensuring the safety of the occupant.

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

[0037] Pulling the seat belt extending from the vehicle body can drive the second reel to rotate, and pulling the pull rope extending from the vehicle body can drive the sliding member to slide along the axial direction of the first reel. In this way, the second reel can be placed in the first state or the second state by pulling the pull rope and the seat belt, thereby ensuring that the seat belt functions normally to ensure the personal safety of the occupants in the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 paying any creative work.

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

[0040] Figure 2 for Figure 1 An exploded view of the seat belt retractor is shown;

[0041] Figure 3 is a structural schematic diagram of the second scroll being in a first state;

[0042] Figure 4 is a structural schematic diagram showing that the second scroll is in a second state;

[0043] Figure 5 A diagram of the internal structure of a vehicle provided in an embodiment of the present application.

[0044] Reference numerals: 100, seat belt retractor;

[0045] 1. Mounting frame; 11. Third supporting part; 11a. Third supporting hole; 12. First supporting part; 12a. First supporting hole; 13. Second supporting part; 13a. Second supporting hole; 2. First reel; 21a. First damping disk; 21b. Second damping disk; 22. Spline; 23a. First position-limiting member; 23b. Second position-limiting member; 3. Second reel; 31. Mounting hole; 32. Fixed part; 33. First matching part; 4. Sliding part; 41. Second matching part; 42. Mounting groove; 43. Spline groove; 5. Force-bearing member; 6. Guide rail; 7. Elastic member; 8. Second exit; 9. First exit; 10. Safety belt. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "inside", "outside" and the like indicate directions or positional relationships based on the directions or relative positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. Unless otherwise specified, the above-mentioned directional description can be flexibly set in the process of actual application under the condition 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 understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. It can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the embodiments of the present invention, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, article or device including the element.

[0051] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0052] Existing seat belt retractors have a vehicle-sensing locking function. When the vehicle encounters an emergency, the retractor locks the seat belt to protect the occupants. However, in some normal situations, the locking function may be triggered by mistake, causing the seat belt to be locked under normal circumstances and the seat belt cannot be pulled out.

[0053] In off-road scenarios, vehicles often need to go up and down steep slopes. Due to the rugged and rocky roads, vehicles often get stuck in deep ruts, get stuck in rocky road conditions, or have limited vision ahead. At this time, the occupants need to get out of the vehicle to check the road conditions or remove obstacles.

[0054] When the occupant returns to the vehicle and continues to drive, the vehicle is in a highly tilted state, the vehicle-sensing locking function of the seat belt is triggered, the seat belt retractor is locked, and the seat belt reel cannot rotate, resulting in the seat belt being unable to be pulled out. Off-road activities are intense and dangerous. In such a scenario, if the seat belt cannot be fastened, the life safety of the occupant cannot be guaranteed.

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

[0056] Please refer to Figure 1 and Figure 2 , Figure 1 This is a structural schematic diagram of a seat belt retractor 100 provided in an embodiment of the present application. Figure 2 for Figure 1 The exploded view of the seat belt retractor 100 shown in FIG. 1 may include a mounting frame 1 and a first reel 2 . The mounting frame 1 may cooperate with the first reel 2 to achieve a locking function of the seat belt.

[0057] Among them, the mounting frame 1 may include a first support portion 12 and a second support portion 13 arranged at intervals, the first support portion 12 is provided with a first support hole 12a, the second support portion 13 is provided with a second support hole 13a, and at least part of the first reel 2 is arranged in the first support hole 12a and the second support hole 13a, so that the first reel 2 can rotate around the central axis, so that the seat belt can be pulled out.

[0058] The inner surface of the first support hole 12a is provided with a first inner tooth along the circumferential direction, and the inner surface of the second support hole 13a is provided with a second inner tooth along the circumferential direction. The first reel 2 may include a first damping disc 21a and a second damping disc 21b, which are respectively arranged at two ends of the first reel 2, the first damping disc 21a is connected with the first inner tooth, and the second damping disc 21b is connected with the second inner tooth, and a locking structure is arranged 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 frame 1 to realize the locking function of the safety belt.

[0059] In the embodiment of the present application, when the vehicle is in a tilted state, the small balls in the first damping disc 21a and the second damping disc 21b are acted upon by gravity, and the small ball cover plate is lifted, so that the pawl on the small ball cover plate extends into the ratchet wheel and blocks the ratchet wheel, that is, the first damping disc 21a and the second damping disc 21b are blocked by the inner teeth on the mounting frame 1, so that the first reel 2 cannot rotate, and the safety belt cannot be 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 acted upon by acceleration, and the small ball cover plate is also lifted, triggering the locking function, and the safety belt cannot be pulled out.

[0060] In the embodiment of the present application, the seat belt retractor 100 may further include a second reel 3 , at least a portion of the second reel 3 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 It is a structural schematic diagram of the second reel 3 being in the first state. When the second reel 3 is in the first state, the second reel 3 rotates synchronously with the first reel 2 .

[0062] In this way, when the vehicle is driving normally, the first reel 2 and the second reel 3 are not locked, and the seat belt can be pulled out normally; when the vehicle encounters an emergency situation, such as a collision, rollover or other accident, the locking structure 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, thereby preventing the occupants from being thrown out of the seat due to inertia or gravity, reducing accidental casualties of the occupants.

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

[0064] In this way, if the vehicle is in a complex road condition but not in an accident, and the seat belt retractor 100 is mistakenly locked due to the poor posture of the vehicle, 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, and the locked state of the second reel 3 can be released, so that the seat belt can be pulled out normally, and then the seat belt can function normally to ensure the personal safety of the vehicle occupants.

[0065] Please refer to Figure 1 to Figure 4 In some embodiments of the present application, a first matching portion 33 may be provided on the second reel 3, and the seat belt retractor 100 may further include a sliding member 4 slidably provided on the first reel 2, and the sliding member 4 has at least a first position and a second position.

[0066] Please refer to Figure 2 and Figure 3 When in the first position, the sliding member 4 can cooperate with the first matching portion 33 to make the second reel 3 located in the first state, so that the second reel 3 can rotate synchronously with the first reel 2 .

[0067] Please refer to Figure 2 and Figure 4 When in the second position, the sliding member 4 is disengaged from the first matching portion 33, so that the second reel 3 is in the second state, so that the second reel 3 can rotate relative to the first reel 2, and the seat belt can be pulled out normally, thereby resolving the situation where the seat belt is accidentally locked.

[0068] Please refer to Figure 1 to Figure 4 In some embodiments of the present application, the sliding member 4 can be slidably arranged along the axial direction of the first reel 2. In this way, the sliding member 4 can be switched between the first position and the second position by axially sliding the sliding member 4, so that the safety belt can be freely stretched or locked according to the needs of the occupants, thereby ensuring the normal function of the safety belt and further ensuring the safety of the occupants.

[0069] In some embodiments of the present application, the sliding member 4 is sleeved on the first reel 2. Since the second reel 3 is also sleeved on the first reel 2, the sliding member 4 can be matched and disengaged from the first reel 2, so that the second reel 3 can realize the conversion between the first state and the second state.

[0070] In some embodiments of the present application, a first limiting portion may be provided on the outer peripheral surface of the first scroll 2, and a second limiting portion may be provided on the inner wall surface of the sliding member 4 close to the first scroll 2. The first limiting portion cooperates with the second limiting portion to limit the rotation of the sliding member 4 around the central axis direction of the first scroll 2.

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

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

[0073] The spline 22 and the spline groove 43 cooperate with each other to achieve the circumferential limit between the slider 4 and the first reel 2, so that the slider 4 and the first reel 2 move synchronously. Since the spline 22 and the spline groove 43 transmit torque through the meshing between the key teeth, the spline 22 has more key teeth and a larger contact area, so that the bearing capacity of the spline 22 is better and the motion transmission is more uniform.

[0074] In addition, since the extension direction of the spline 22 teeth is consistent with the axial direction of the first reel 2 , the spline 22 and the spline groove 43 can guide the sliding member 4 so that the sliding member 4 can slide along the axial straight line of the first reel 2 .

[0075] In some embodiments of the present application, a second matching portion 41 may be provided on one side of the sliding member 4 close to the second reel 3, and when the sliding member 4 is in the first position, the second matching portion 41 can match with the first matching portion 33. The second matching portion 41 matches with the first matching portion 33, so that the second reel 3 and the sliding member 4 can rotate synchronously, thereby making the second reel 3 and the first reel 2 rotate synchronously.

[0076] In some embodiments of the present application, the first matching portion 33 may include one of a protrusion or a groove, and the second matching portion 41 may include the other of the protrusion and the groove.

[0077] In this way, the protrusion cooperates with the groove, so that the sliding member 4 cooperates with the second reel 3 , thereby making the sliding member 4 and the second reel 3 rotate synchronously.

[0078] In some embodiments of the present application, a plurality of the protrusions and the grooves are provided, and the plurality of protrusions are arranged at intervals around the central axis direction of the first reel 2 .

[0079] In this way, the first matching part 33 and the second matching part 41 can be more fully matched, the contact area between the first matching part 33 and the second matching part 41 is increased, and the force distribution can be more uniform, thereby improving the transmission efficiency of the sliding part 4 to the second reel 3 and preventing the protrusion from breaking due to excessive force concentration.

[0080] In some embodiments of the present 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 the second reel 3 is 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 central axis direction of the first reel 2. The second reel 3 is arranged between the first limiting member 23a and the second limiting member 23b, which can limit the axial movement of the second reel 3 along the first reel 2, thereby preventing the second reel 3 from sliding with the sliding member 4 and causing the first limiting portion and the second limiting portion to be unable to disengage.

[0082] In some embodiments of the present application, the second reel 3 may further include a fixing portion 32, and the fixing portion 32 is used to fix one end of the safety belt. In this way, the fixing portion 32 can fix one end of the safety belt and allow the safety belt to be wound around the second reel 3 for easy pulling out or stowing.

[0083] In some embodiments, the second reel 3 may further include a mounting hole 31 spaced apart from the fixing portion 32 , and the mounting hole 31 is used to extend the safety belt.

[0084] In this way, one end of the safety belt can be fixed at the fixing portion 32 and passed through the mounting hole 31, so that the safety belt is wound on the second reel 3, and when the second reel 3 rotates, the safety belt can be pulled out or retracted. In addition, the fixing portion 32 and the mounting hole 31 are arranged at intervals to ensure the effective length of the safety belt installation position, and prevent the safety belt from falling off due to the installation length of the safety belt being too short, which cannot effectively ensure the effect of the safety belt.

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

[0086] The safety belt is wound on the second reel 3 and is located between the third support portion 11 and the second support portion 13. In this way, the third support portion 11 can limit the safety belt to prevent the safety belt from shifting during the pulling process and causing interference to other components.

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

[0088] In some embodiments of the present application, the seat belt retractor 100 may further include an elastic member 7 , and the elastic member 7 elastically supports the sliding member 4 so that the sliding member 4 is located at the first position.

[0089] One end of the elastic member 7 is connected to the first scroll 2, and the other end is connected to the end of the sliding member 4 away from the second scroll 3. When the sliding member 4 is in the first position, the elastic member 7 can provide elastic support to the sliding member 4 so that the first matching portion 33 matches with the second matching portion 41, thereby driving the second scroll 3 and the first scroll 2 to move synchronously; when the sliding member 4 is in the second position, the elastic member 7 is compressed, so that the first matching portion 33 is disengaged from the second matching portion 41, thereby allowing the second scroll 3 to rotate independently relative to the first scroll 2.

[0090] In some embodiments, the elastic member 7 may be a spring, rubber or sponge, which is not further limited in the present application.

[0091] In order to compress the elastic member 7 and disengage the first matching portion 33 from the second matching portion 41 , in some embodiments of the present application, the seat belt retractor 100 may further include a force-bearing member 5 , the sliding member 4 is provided with an installation groove 42 , and the force-bearing member 5 is sleeved in the installation groove 42 .

[0092] In this way, a force directed from the sliding member 4 to the elastic member 7 can be applied to the force-bearing member 5 along the axial direction of the first reel 2. The force-bearing member 5 is sleeved in the mounting groove 42 of the sliding member 4, so that the force-bearing member 5 can be moved to the second position, and the first matching portion 33 is disengaged from the second matching portion 41, so that the second reel 3 can rotate independently.

[0093] In some embodiments of the present application, the seat belt retractor 100 may further include a guide rail 6 connected to the mounting frame 1 , the guide rail 6 may extend along the axial direction of the first reel 2 , and at least a portion of the force bearing member 5 is disposed in the guide rail 6 .

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

[0095] In some embodiments, the guide rail 6 can be provided in plurality. For example, the guide rail 6 can be provided in 2, 3 or 4 numbers. The plurality of guide rails 6 are evenly spaced along the circumferential direction of the sliding member 4, so that the force-bearing member 5 can be evenly stressed, thereby reducing the risk of fracture of the force-bearing member 5.

[0096] In an embodiment of the present application, the force-bearing member 5 can rotate around the axis of the first reel 2 in the mounting groove 42. Since at least a portion of the force-bearing member 5 is connected to the guide rail 6, and the guide rail 6 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 reel 2, and 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 by the guide rail 6.

[0097] In some embodiments of the present application, the seat belt retractor 100 may further include a pull rope, 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 it receives to the force-bearing member 5, so that the force-bearing member 5 drives the sliding member 4 to slide axially, so that the second reel 3 is in the second state, the locking state of the safety belt is released, and the normal stretching of the safety belt is ensured.

[0099] In some embodiments of the present application, the safety belt retractor 100 may further include a pull ring connected to the other end of the pull rope. In this way, pulling the pull ring can drive the pull rope to move, and then drive the sliding member 4 to move. The pull ring is provided to make it more convenient for the occupant to pull the pull rope.

[0100] In some embodiments of the present application, a fixed pulley is fixedly provided at one end of the guide rail 6 close to the pull rope, and at least a portion of the pull rope is connected to the fixed pulley, so that the direction of the force on the pull rope can be changed, thereby making pulling more convenient.

[0101] The embodiment of the present application further provides a vehicle, which may include the seat belt retractor 100 described above.

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

[0103] In this way, the safety belt 10 can be pulled out or tightened following the rotation of the second reel 3, that is, when the second reel 3 is in the first state, the safety belt 10 can be pulled out or tightened following the rotation of the first reel 2. In an emergency, the locking structure is triggered, the first reel 2 is locked, and the second rotating shaft cannot rotate either, thereby causing the safety belt 10 to be locked to prevent the member from being thrown out due to an accident; when the safety belt 10 is mistakenly locked, pulling the pull ring can drive the sliding member 4 away from the second reel 3, so that the second reel 3 is in the second state, so that the second reel 3 can rotate independently relative to the first reel 2, thereby allowing the safety belt 10 to be pulled out or tightened.

[0104] In some embodiments of the present application, the vehicle may further include a vehicle body, the seat belt retractor 100 is arranged in the vehicle body, a first outlet 9 and a second outlet 8 are provided on the vehicle body, at least part of the seat belt 10 extends out of the first outlet 9, and at least part of the pull rope extends out of the second outlet 8 and is connected to the pull ring.

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

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

[0107] Therefore, in some embodiments of the present application, at least one movable pulley may be provided between the second outlet 8 and the fixed pulley, and 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 specifically set according to the elastic force of the elastic member 7, and the present application does not make further limitations on this.

[0108] In some embodiments of the present application, a coil spring disc is provided on one side of the second outlet 8 close to the inside of the vehicle body, and at least a portion of the pull rope is provided in the coil spring disc. When the pull ring is pulled, the pull rope can be pulled out of the coil spring disc and transmit the pulling force to the sliding member 4. When the pull ring is released, the pull rope retracts into the coil spring disc.

[0109] In some embodiments of the present application, a limiting device is provided on the tension rope, the limiting device is connected between the coil spring disk and the pulley block, and the minimum width of the limiting device is greater than the width of the notch of the coil spring disk. The limiting device can move with the movement of the pull rope, and when the first matching portion 33 and the second matching portion 41 are disengaged and the gap between the first matching portion 33 and the second matching portion 41 is greater than or equal to 0.5 mm, illustratively, when the gap between the first matching portion 33 and the second matching portion 41 is 0.5 mm, 0.8 mm or 1 mm, the limiting device abuts against the coil spring disk, and the pull rope cannot continue to stretch outward, thereby reminding the occupant that the second reel 3 has been unlocked and there is no need to continue pulling.

[0110] In some embodiments of the present application, when the sliding tooth is in the first position, the pull cord is marked with a first scale at 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 second outlet 8 to remind the occupant that the second reel 3 is in the second state. The occupant determines whether the second reel 3 is unlocked or restored to the synchronous state with the first reel 2 by the first scale and the second scale.

[0111] When the second reel 3 is unlocked, that is, the second reel 3 is in the second state, after the safety belt 10 is pulled out and fastened, the second reel 3 needs to be restored to the first state. During the restoration process, the protrusions and grooves of the first matching portion 33 and the second matching portion 41 may not be aligned, so that the first matching portion 33 and the second matching portion 41 cannot be properly matched. In this case, the pull ring and the safety belt 10 are pulled at the same time to rotate the second shaft at a small angle so that the protrusions are aligned with the grooves, and the safety belt 10 and the pull ring are released, so that the first matching portion 33 and the second matching portion 41 can be matched, and the second reel 3 can rotate synchronously with the first reel 2, so that the safety belt 10 can be locked normally in an unexpected situation to protect the safety of the occupants.

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

[0113] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A seat belt retractor, characterized in that: It comprises a mounting frame (1), a first reel (2) and a second reel (3), wherein the mounting frame (1) can cooperate with the first reel (2) to lock the first reel (2); At least part of the second reel (3) is sleeved on the first reel (2), and the second reel (3) has at least a first state and a second state. When the second reel (3) is in the first state, the second reel (3) rotates synchronously with the first reel (2); when the second reel (3) is in the second state, the second reel (3) can rotate relative to the first reel (2).

2. The seat belt retractor according to claim 1, characterized in that: The second reel (3) is provided with a first matching portion (33), and the seat belt retractor further comprises a sliding member (4) slidably arranged on the first reel (2); The sliding member (4) has at least a first position and a second position. When in the first position, the sliding member (4) cooperates with the first matching portion (33) so that the second reel (3) is located in the first state; when in the second position, the sliding member (4) is disengaged from the first matching portion (33) so that the second reel (3) is located in the second state.

3. The seat belt retractor according to claim 2, characterized in that: The sliding member (4) is arranged to slide along the axial direction of the first reel (2).

4. The seat belt retractor according to claim 2 or 3, characterized in that: The sliding member (4) is sleeved on the first reel (2).

5. The seat belt retractor according to claim 4, characterized in that: A first limiting portion is provided on the outer peripheral surface of the first reel (2), and a second limiting portion is provided on the inner wall surface of the sliding member (4) close to the first reel (2). The first limiting portion cooperates with the second limiting portion to limit the sliding member (4) from rotating around the central axis direction of the first reel (2).

6. The seat belt retractor according to claim 5, characterized in that: The first limiting portion includes one of a spline (22) and a spline groove (43), and the second limiting portion includes the other of the spline (22) and the spline groove (43).

7. The seat belt retractor according to claim 2 or 3, characterized in that: A second matching portion (41) is provided on a side of the sliding member (4) close to the second reel (3); when the sliding member (4) is located at the first position, the second matching portion (41) can match with the first matching portion (33).

8. The seat belt retractor according to claim 7, characterized in that: The first matching portion (33) includes one of a protrusion or a groove, and the second matching portion (41) includes the other of the protrusion and the groove.

9. The seat belt retractor according to claim 8, characterized in that: There are a plurality of protrusions, and the plurality of protrusions are arranged at intervals around the central axis direction of the first reel (2).

10. The seat belt retractor according to any one of claims 1 to 3, characterized in that: It also comprises a first limiting member (23a) and a second limiting member (23b) which are arranged on the first reel (2) at an interval, and the second reel (3) is arranged between the first limiting member (23a) and the second limiting member (23b).

11. The seat belt retractor according to any one of claims 1 to 3, characterized in that: The second reel (3) further comprises a fixing portion (32), wherein the fixing portion (32) is used to fix one end of the safety belt (10).

12. The seat belt retractor according to claim 2 or 3, characterized in that: It also comprises an elastic member (7), wherein the elastic member (7) elastically supports the sliding member (4) so ​​that the sliding member (4) is located at the first position.

13. The seat belt retractor according to claim 2 or 3, characterized in that: It also comprises a force-bearing member (5), the sliding member (4) is provided with a mounting groove (42), and the force-bearing member (5) is sleeved in the mounting groove (42).

14. The seat belt retractor according to claim 13, characterized in that: It also comprises a guide rail (6) connected to the mounting frame (1), wherein the guide rail (6) extends along the axial direction of the first reel (2), and at least a part of the force-bearing member (5) is arranged in the guide rail (6).

15. The seat belt retractor according to claim 13, characterized in that: It also comprises a pull rope, one end of which is connected to the force-bearing member (5).

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

17. The seat belt retractor according to claim 16, characterized in that: It also comprises a pulley arranged on the guide rail (6), and at least a part of the pull rope is connected to the pulley to change the direction of the force on the pull rope.

18. A vehicle, characterized in that: A seat belt retractor (100) comprising any one of claims 1 to 17.

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

20. The vehicle according to claim 19, characterized in that It also includes a vehicle body, the safety belt retractor (100) is arranged in the vehicle body, and a first outlet (9) and a second outlet (8) are provided on the vehicle body, at least part of the safety belt (10) extends out of the first outlet (9), and at least part of the pull rope extends out of the second outlet (8) and is connected to the pull ring.

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