A latch kit, a seat belt, and a vehicle

Abstract

This disclosure relates to a latching mechanism, a seatbelt, and a vehicle. The latching mechanism is used in a smart cockpit and includes a latch and a locking release mechanism. The latch is connected to a webbing via the locking release mechanism. The webbing between the latch and the retractor is a shoulder strap, and the webbing between the latch and the pretensioner is a lap belt. The locking release mechanism is connected to the lap belt and has a locked state and a released state. In the released state, the locking release mechanism can release part of the webbing to reduce the distance between the intersection of the webbing and the locking release mechanism and the pretensioner, allowing the shoulder strap to fit snugly against the occupant. When a collision occurs, in the released state, the locking release mechanism can selectively release part of the webbing in the lap belt, thereby shortening the effective length between the lap belt and the pretensioner. This is equivalent to shifting the bottom end of the shoulder strap to the right, adjusting the overall path of the shoulder strap downwards away from the occupant's neck area, avoiding slippage and jamming, and preventing safety hazards such as strangulation and neck injuries.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle technology, and more specifically, to a latch kit, a seat belt, and a vehicle. Background Technology

[0002] As the demand for vehicle intelligence and comfort continues to rise, traditional seat designs can no longer meet users' pursuit of the ultimate riding experience. Especially during long drives or journeys, maintaining a fixed posture for extended periods can easily lead to fatigue and discomfort. To address this pain point, vehicle manufacturers have begun introducing intelligent seat technologies such as "zero-gravity mode" or "reclining mode." These modes adjust the seat to a posture that maximizes the distribution of body weight, simulating the weightlessness of a space capsule, thus providing passengers with a floating-like comfort experience. This mode typically involves a large angle of backrest recline, synchronized seat cushion adjustments, and extended leg rests, aiming to comprehensively enhance passenger comfort, especially suitable for scenarios requiring extended rest or relaxation.

[0003] However, in situations of deceleration such as a vehicle collision, the occupant's body moves forward relative to the seat, and the shoulder strap of the seat belt may slide upward due to the relative displacement of the occupant's body, thus getting stuck in the occupant's neck area, which may lead to problems such as strangulation, neck injury, or even suffocation. Summary of the Invention

[0004] The purpose of this disclosure is to provide a locking tongue kit, a seat belt, and a vehicle to solve the technical problems existing in the related art.

[0005] To achieve the above objectives, according to a first aspect of this disclosure, a latch kit is provided, including a latch and a locking release mechanism, wherein the latch is connected to a webbing via the locking release mechanism, the webbing located between the latch and a take-up device is a shoulder strap, the webbing located between the latch and a pretensioner is a waist belt, and the locking release mechanism is connected to the waist belt; The locking release mechanism has a locked state and a released state. In the released state, the locking release mechanism can release part of the webbing to reduce the distance between the intersection of the webbing and the locking release mechanism and the pretensioner, and make the shoulder strap fit snugly against the occupant.

[0006] Optionally, the locking release mechanism includes a sleeve slidably fitted onto the webbing, and a locking tongue connected to the end of the sleeve opposite to the pretensioner. In the released state, the sleeve can be at least partially torn.

[0007] Optionally, the sleeve includes a first sidewall and a second sidewall, the first sidewall and the second sidewall are arranged opposite to each other and together enclose to form a cylindrical structure, and a tear guiding structure is formed at the connection between the first sidewall and the second sidewall, the tear guiding structure extending along the length direction of the sleeve.

[0008] Optionally, the locking release structure further includes a first limiting member connected to one end of the sleeve near the locking tongue, the first limiting member being able to open when subjected to a force exceeding a predetermined threshold.

[0009] Optionally, the first limiting member includes a limiting band, a limiting pin, and a driving member. The limiting pin is connected to both ends of the limiting band and is used to tighten the limiting band around the outer periphery of the sleeve. The driving member can drive the limiting pin to move to unlock the limiting pin from locking the limiting band.

[0010] Optionally, the locking release mechanism further includes a second limiting member, which is connected to one end of the sleeve opposite to the locking tongue, and the second limiting member is sleeved on the outer periphery of the webbing; When the locking release mechanism is in the released state, the intersection is formed at the junction of the webbing and the second limiting member.

[0011] Optionally, the end of the second limiting member near the latch is formed as an inclined end face, and the webbing reverses direction when it contacts the inclined end face, so that the shoulder strap located above the second limiting member fits against the occupant.

[0012] Optionally, the tilt angle of the tilted end face is 15° to 90°.

[0013] According to a second aspect of this disclosure, a seat belt is provided, comprising a webbing, a retractor, a pretensioner, and a locking tongue assembly as described above, wherein one end of the webbing is connected to the retractor, the other end of the webbing is connected to the pretensioner, and the locking tongue assembly is movably fitted onto the webbing.

[0014] According to a third aspect of this disclosure, a vehicle is provided, including the locking tongue assembly as described above and the seat belt as described above.

[0015] Through the above technical solution, on the one hand, when the vehicle is involved in a collision or suddenly decelerates, the locking release mechanism can selectively release the webbing of the waist belt in the released state, thereby shortening the effective length between the waist belt and the pretensioner. This is equivalent to shifting the bottom end of the shoulder strap (the locking tongue position) to the right (or the direction of the pretensioner), adjusting the overall path of the shoulder strap downward, thereby moving it away from the occupant's neck area and avoiding slippage and jamming, which could cause safety hazards such as strangulation or neck injury.

[0016] On the other hand, the released webbing allows the shoulder straps to fit snugly against the occupant's shoulders and chest, providing a more even distribution of restraint force. This ensures that the shoulder straps remain stable and fitted during impact, reduces localized pressure concentration, and improves the overall protection comfort and restraint efficiency of the occupant.

[0017] Furthermore, compared to related technologies that use auxiliary straps to avoid strangulation, the locking tongue kit provided in this disclosure has a simpler structure and does not involve changes to the overall shape or wearing method of the seat belt, thus making it more convenient for occupants to wear.

[0018] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a perspective view of a locking tongue assembly provided in an exemplary embodiment of this disclosure; Figure 2 This is a perspective view of a locking tongue assembly provided in another exemplary embodiment of the present disclosure, wherein, Figure 2 The shape of the second limiting member and Figure 1 The shape of the second limiting component is different; Figure 3 This is a partial perspective view of a locking tongue assembly and webbing provided in an exemplary embodiment of the present disclosure, wherein the locking release mechanism is in a locked state and the sleeve is not torn; Figure 4 This is a partial perspective view of a locking tongue assembly and webbing provided in an exemplary embodiment of the present disclosure, wherein the locking release mechanism is in the released state and the sleeve is torn. Figure 5 This is a perspective view of a locking tongue assembly and webbing provided in an exemplary embodiment of the present disclosure, wherein the locking release mechanism is in a locked state and the sleeve is not torn; Figure 6 This is a perspective view of a locking tongue assembly and webbing provided in an exemplary embodiment of the present disclosure, wherein the locking release mechanism is in the released state and the sleeve is torn. Figure 7 This is a partial main body diagram of a locking tongue kit and webbing provided in an exemplary embodiment of the present disclosure, wherein the locking release mechanism is in a locked state and the sleeve is not torn; Figure 8This is a partial main body diagram of a locking tongue assembly and webbing provided in an exemplary embodiment of the present disclosure, wherein the locking release mechanism is in the released state and the sleeve is torn; Figure 9 This is a partial top view of a locking tongue assembly and webbing provided in an exemplary embodiment of the present disclosure, wherein the locking release mechanism is in the released state and the sleeve is torn. Figure 10 This is a cross-sectional view of a locking tongue assembly and webbing provided in an exemplary embodiment of this disclosure.

[0020] Explanation of reference numerals in the attached figures 1-Lock assembly; 10-Lock; 11-Locking release mechanism; 110-Sleeve; 111-First sidewall; 112-Second sidewall; 113-Tear guide structure; 114-First limiting member; 1141-Limiting band; 1142-Limiting pin; 1143-Inclined end face; 115-Second limiting member; 2-Webbing; 21-Shoulder strap; 22-Waist belt; 3-Retractor; 4-Pretensioner; 5-Snap fastener. Detailed Implementation

[0021] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0022] In this disclosure, unless otherwise stated, directional terms such as "upper" and "lower" are used to indicate the orientation or positional relationship based on the orientation of the vehicle during normal driving. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or a specific orientation structure and operation. Therefore, they should not be construed as limitations on this disclosure. The terms "inner" and "outer" refer to the inner and outer contours of the corresponding structures.

[0023] Additionally, it should be noted that the terms used, such as "first" and "second," are used to distinguish one element from another and do not indicate sequence or importance. In the description with reference to the accompanying drawings, the same reference numerals in different drawings denote the same element.

[0024] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "connect," "link," and "install" 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. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0025] In related technologies, during deceleration scenarios such as vehicle collisions, when the occupant's body moves forward, the traditional seatbelt shoulder strap can easily slide upwards and become stuck around the neck, posing a risk of strangulation, neck injury, or even suffocation. This is especially true when the occupant is in a highly tilted, zero-gravity or lying-down position; in the event of a collision or emergency braking, the occupant's body will slide forward relative to the seat, making them more susceptible to injury.

[0026] Based on this, refer to Figures 1 to 10 As shown, according to a first aspect of this disclosure, a latch kit 1 is provided, including a latch 10 and a locking release mechanism 11. The latch 10 is connected to a webbing 2 via the locking release mechanism 11. The webbing 2 located between the latch 10 and a retractor 3 is a shoulder strap 21, and the webbing 2 located between the latch 10 and a pretensioner 4 is a waist belt 22. The locking release mechanism 11 is connected to the waist belt 22. The locking release mechanism 11 has a locked state and a released state. In the released state, the locking release mechanism can release part of the webbing 2 to reduce the distance between the intersection of the webbing 2 and the locking release mechanism 11 and the pretensioner 4, and to make the shoulder strap 21 fit snugly against the occupant.

[0027] Through the above technical solution, on the one hand, when the vehicle collides or suddenly decelerates, the locking release mechanism 11 can selectively release the webbing 2 of the waist belt 22 in the released state, thereby shortening the effective length between the waist belt 22 and the pretensioner 4. This is equivalent to moving the bottom end of the shoulder strap 21 (the position of the locking tongue 10) to the right (or the direction of the pretensioner 4), so that the overall path of the shoulder strap 21 is adjusted downward, thereby moving it away from the neck area of ​​the occupant and avoiding sliding and jamming, which could cause safety hazards such as strangulation and neck injury.

[0028] On the other hand, the released webbing 2 allows the shoulder strap 21 to fit snugly against the occupant's shoulders and chest, providing a more even distribution of restraint force. This ensures that the shoulder strap 21 remains stable and fitted during impact, reduces local pressure concentration, and improves the overall protection comfort and restraint efficiency of the occupant.

[0029] By ensuring the correct position and effective restraint of the shoulder strap 21, the passive safety protection capability of the occupant in special seat modes (zero gravity, recline) is improved. The seat belt is upgraded from passive restraint to active fit, ensuring that the occupant is effectively and safely fixed in the event of a collision, avoiding secondary injuries, especially to the vulnerable neck area. Furthermore, compared to related technologies that use auxiliary straps to avoid strangulation, the locking tongue kit 1 provided in this disclosure has a simpler structure, does not involve changes to the overall shape or wearing method of the seat belt, and is therefore more convenient for the occupant to wear.

[0030] This disclosure does not limit the specific structure and implementation of the locking and releasing mechanism 11 mentioned above. For example, in one embodiment provided by this disclosure, such as Figures 1 to 3, Figure 5 , Figure 7 as well as Figure 10 As shown, the locking release mechanism 11 may include a sleeve 110, which is slidably fitted onto the webbing 2. A locking tongue 10 is connected to the end of the sleeve 110 away from the pretensioner 4. In the released state, the sleeve 110 can be at least partially torn. Thus, when the vehicle collides or decelerates suddenly, the webbing 2 inside the sleeve 110 will exert a tension on the sleeve 110. Under the action of the tension, the webbing 2 can at least partially tear the sleeve 110, that is, at this time the locking release mechanism 11 is in the released state. Furthermore, as the sleeve 110 is torn, the webbing 2 originally located inside the sleeve 110 is also released more and more, so that the intersection of the webbing 2 and the sleeve 110 continuously moves towards the pretensioner 4. During the movement of the webbing 2, the shoulder strap 21 of the webbing 2 also moves away from the neck, causing the path of the shoulder strap 21 to shift downward and away from the occupant's neck area, effectively preventing the risk of strangulation or suffocation caused by the shoulder strap 21 slipping upward during a collision.

[0031] Furthermore, by adopting the above solution, no additional electric motor, sensor or complex linkage mechanism is required. The structure is simple, and the locking and releasing of the webbing 2 can be achieved by relying on the mechanical design of the sleeve 110 material and its assembly relationship with the webbing 2. This improves the mechanical reliability of the system. At the same time, due to the fewer parts and relatively simple process, it is also conducive to controlling production costs and easy to integrate into existing seat belt systems.

[0032] In other embodiments provided in this disclosure, the locking release mechanism 11 may also be a mechanical transmission structure. That is, when the vehicle collides or suddenly decelerates, the webbing 2 is tensioned and a force is applied to the mechanical transmission structure (the force reaches a certain threshold), triggering the mechanical transmission structure to start, thereby releasing the webbing 2, so as to adjust the position of the shoulder strap 21 and prevent the shoulder strap 21 from strangling the neck.

[0033] In the aforementioned embodiment where the locking tongue 10 is connected to the webbing 2 via the locking release mechanism 11, and the locking release mechanism 11 includes a sleeve 110 that is slidably fitted onto the webbing 2, when the occupant wears the webbing 2, the position of the sleeve 110 on the webbing 2 can be adjusted according to personal needs (such as body characteristics like height, weight, etc.) to achieve the wearing of the seat belt.

[0034] To facilitate the tearing of the sleeve 110 during a vehicle collision, optionally, as follows: Figures 1 to 3 , Figure 5 , Figure 7 as well as Figure 10As shown, the sleeve 110 may include a first sidewall 111 and a second sidewall 112. The first sidewall 111 and the second sidewall 112 are arranged opposite to each other and together enclose a cylindrical structure. A tear guide structure 113 is formed at the connection between the first sidewall 111 and the second sidewall 112, and the tear guide structure 113 extends along the length direction of the sleeve 110. On the one hand, the design of the tear guide structure 113 weakens the overall strength of the connection of the sleeve 110, making it a pre-designed weak point. In this way, under the action of tensile or shear forces generated by a collision, the sleeve 110 is more likely to start tearing at the guide structure, thereby reducing the force threshold required to trigger tearing. This helps to initiate the adjustment of the shoulder strap 21 position in the early stage of a collision, improving the response speed of the safety system.

[0035] On the other hand, such as Figure 10 As shown, the tear guide structure 113 (such as a preset notch, weak line, or connection area of ​​a specific shape) can effectively guide the starting point and development direction of the tear. This means that when the collision is triggered, the sleeve 110 will not break randomly and irregularly, but will tear along the preset guide line, ensuring that the tearing process is controllable and that a predetermined length of webbing 2 can be released.

[0036] In the aforementioned embodiment where the sleeve 110 may include a first sidewall 111 and a second sidewall 112, and the first sidewall 111 and the second sidewall 112 are arranged opposite to each other and together enclose to form a cylindrical structure, as shown below... Figure 3 , Figure 6 , Figure 8 as well as Figure 9 As shown, the latch 10 can be connected to one of the first sidewall 111 and the second sidewall 112. In this way, even if one of the first sidewall 111 and the second sidewall 112 is torn off, the latch 10 can still be connected to the webbing 2 through the other of the first sidewall 111 and the second sidewall 112.

[0037] like Figure 10 As shown, a tearing guide structure 113 may be formed between the first sidewall 111 and the second sidewall 112, or multiple tearing guide structures 113 may be formed to increase the fault tolerance rate during the tearing process of the above-mentioned cylindrical structure.

[0038] Alternatively, in another embodiment provided in this disclosure, the first sidewall 111 and the second sidewall 112 can also be connected by a snap-fit ​​mechanism. In this way, when the webbing 2 in the cylindrical structure formed between the two generates a sufficiently large tension, it can drive the first sidewall 111 to detach from the second sidewall 112. At this time, the webbing 2 originally located between the first sidewall 111 and the second sidewall 112 can be released.

[0039] Alternatively, the first sidewall 111 and the second sidewall 112 can also be electromagnets. When no collision occurs, the first sidewall 111 and the second sidewall 112 are attracted to each other on both sides of the sleeve 110 under the action of electromagnetic force. When a collision occurs and the force acting on the first sidewall 111 and the second sidewall 112 is large enough, the electromagnet is de-energized and the first sidewall 111 and the second sidewall 112 are separated, and the webbing 2 located between the first sidewall 111 and the second sidewall 112 can be released at this time.

[0040] In one exemplary embodiment provided in this disclosure, the length of the tear guide structure 113 can be between 2 cm and 45 cm, thereby adapting to the needs of different deceleration conditions and occupants of different body sizes.

[0041] To further improve the fault tolerance and stability of the sleeve 110, such as to avoid the problem of the sleeve 110 being torn arbitrarily due to slight vehicle deceleration or accidental contact with the seat belt by the user, in one embodiment provided in this disclosure, such as Figures 1 to 3 As shown, the locking release structure may further include a first limiting member 114, which is connected to the end of the sleeve 110 near the locking tongue 10. The first limiting member 114 can open when subjected to a force exceeding a predetermined threshold. In this way, by setting the first limiting member 114 and limiting the predetermined force threshold, the locking release mechanism 11 can be prevented from being accidentally triggered or the sleeve 110 from being abnormally torn when the vehicle decelerates slightly, brakes normally, or when the occupant adjusts the seat belt routinely. The first limiting member 114 will only open when an emergency such as a collision generates a force exceeding the threshold, thus distinguishing between dangerous and normal working conditions. This ensures that the locking release mechanism 11 only operates when there is a real need to protect the shoulder strap 21 from strangulation, guaranteeing the structural stability and restraint reliability of the seat belt under normal use.

[0042] Similarly, this disclosure does not limit the specific structure and limiting method of the first limiting member 114 mentioned above. The first limiting member 114 can adopt an active limiting method or a passive limiting method, for example, as Figures 1 to 3 , Figure 5 as well as Figure 7 As shown, in an exemplary embodiment of active limiting provided in this disclosure, the first limiting member 114 may include a limiting band 1141, a limiting pin 1142, and a driving member (not shown). The limiting pin 1142 is connected to both ends of the limiting band 1141 and is used to tighten the limiting band 1141 around the outer periphery of the sleeve 110. The driving member can drive the limiting pin 1142 to move, so as to unlock the locking of the limiting pin 1142 on the limiting band 1141.

[0043] The limiting band 1141 is wrapped around the outer periphery of the sleeve 110, and the limiting pin 1142 connects and tightens the two ends of the limiting band 1141, so that the limiting band 1141 forms a circumferential clamping constraint on the sleeve 110, restricting the sleeve 110 from expanding and deforming in the radial direction.

[0044] The locking tongue 10 is engaged with the buckle 5 connected to the vehicle body, and the webbing 2 is tightened around the waist and chest of the occupant. When the vehicle slows down slightly, bumps, or the occupant is wearing or adjusting the seat belt normally, the tension of the webbing 2 on the sleeve 110 does not reach the predetermined threshold. The limiting pin 1142 keeps locking the limiting band 1141, and the limiting band 1141 continues to hold the sleeve 110 tightly. The sleeve 110 cannot be torn or stretched open, thus avoiding the locking release mechanism 11 from malfunctioning and improving the stability and fault tolerance of daily use.

[0045] When a vehicle is involved in an emergency such as a collision, the occupants are thrown forward, generating a force exceeding a predetermined threshold. Or when the system receives a collision signal, the drive unit outputs a driving force to drive the limit pin 1142 to displace. The limit pin 1142 moves in a predetermined direction and disengages from the end of the limit band 1141, thereby releasing the locking constraint on both ends of the limit band 1141.

[0046] In order to simplify the structure of the first limiting member 114, in one embodiment provided in this disclosure, the driving member of the first limiting member 114 can be connected to the vehicle's control system signal. In this way, when the vehicle collides, the control system can control the opening of the driving member by collecting the force generated by the occupants moving forward, thereby unlocking the limiting pin 1142.

[0047] In the exemplary embodiments provided in this disclosure, the driving component mentioned above can be a motor or a cylinder. This disclosure does not limit the type of driving component, as long as it can drive the limit pin 1142.

[0048] In an exemplary embodiment of a passive limiting device provided in this disclosure, such as Figures 1 to 3 , Figure 5 as well as Figure 7 As shown, the first limiting member 114 includes a limiting band 1141, a limiting pin 1142, and an elastic reset member. The limiting pin 1142 is movably inserted into the sleeve 110 or the locking tongue 10 bracket. Limiting holes are opened at both ends of the limiting band 1141. The limiting pin 1142 is inserted into the limiting hole to tighten the limiting band 1141 around the sleeve 110. A breaking structure or a sloped guide structure is provided between the limiting pin 1142 and the limiting band 1141. When the tension of the webbing 2 reaches a predetermined threshold, the component force of the limiting band 1141 acting on the limiting pin 1142 is greater than the pre-tightening force of the elastic reset member, forcing the limiting pin 1142 to displace and disengage from the limiting hole, thereby achieving passive unlocking.

[0049] It should be noted that, since the locking release mechanism 11 releases part of the webbing 2 when it is in the released state, the length of the shoulder strap 21 of the webbing 2 increases. In order for the shoulder strap 21 to be tightened on the occupant in time, the trigger response time of the first limit member 114 should be simultaneous with or earlier than the trigger time of the pretensioner 4 and the retractor 3, so that the length of the webbing 2 released by the tear sleeve 110 is effectively pre-tightened.

[0050] Optionally, such as Figures 1 to 9 As shown, the locking release mechanism 11 may further include a second limiting member 115. The second limiting member 115 is connected to the end of the sleeve 110 away from the locking tongue 10, and the second limiting member 115 is sleeved on the outer periphery of the webbing 2. When the locking release mechanism 11 is in the released state, the intersection is formed at the junction of the webbing 2 and the second limiting member 115. After the sleeve 110 is torn, the second limiting member 115 is still sleeved on the outer periphery of the webbing 2 and connected to the end of the sleeve 110, which can form a limiting constraint on the locking tongue 10 and the webbing 2, preventing the locking tongue 10 from completely falling off the webbing 2, ensuring that the seat belt always maintains an intact restraint structure during the collision, and preventing the occupant from losing restraint due to seat belt failure.

[0051] In addition, to prevent the locking release mechanism 11 from sliding relative to the webbing 2 when the user is wearing it normally, a friction-enhancing structure can be provided on the inner wall of the locking release mechanism 11 to increase the friction between the first limiting member 114, the second limiting member 115 and the sleeve 110, thereby improving the stability of the fit between the locking release mechanism 11 and the webbing 2.

[0052] In other words, the second limiting member 115 limits the maximum release position of the webbing 2, so that the intersection of the webbing 2 and the locking release mechanism 11 is stably located at the second limiting member 115, avoiding excessive release of the webbing 2 that would cause the restraint to loosen. This ensures that the shoulder strap 21 moves down to avoid the neck, while maintaining effective restraint on the occupant's torso.

[0053] Optionally, such as Figure 1 , Figure 3 , Figure 4 as well as Figure 9As shown, the end of the second limiting member 115 near the latch 10 is formed as an inclined end face 1143. When the webbing 2 contacts the inclined end face 1143, it changes direction so that the shoulder strap 21 above the second limiting member 115 fits the occupant. On the one hand, the inclined end face 1143 at the end of the second limiting member 115 near the latch 10 allows for a smooth transition when the webbing 2 contacts it, effectively eliminating the problems of compression, wrinkles, and curling caused by abrupt changes in angle of the webbing 2. On the other hand, the webbing 2 extends obliquely upward after a smooth change of direction via the inclined end face 1143, which is more in line with the physiological curve of the human shoulder. This allows the shoulder strap 21 to fit naturally and smoothly against the occupant's chest and shoulder area, avoiding the shoulder strap 21 from slipping, lifting, or localized pressure due to abrupt angles, thus improving the restraint fit and comfort.

[0054] Optionally, the tilt angle of the tilted end face 1143 is 15° to 90°. This angle range covers a variety of guide angles from gentle transition to near vertical, which can adapt to the shoulder curves and sitting postures of occupants of different heights and body types, ensuring that the shoulder straps 21 can extend upward at a reasonable angle, stably fit the occupant's torso, and avoid the shoulder straps 21 from lifting or shifting due to unsuitable angles.

[0055] In order to further facilitate the shoulder strap 21 to fit snugly against the occupant after the reversal of the inclined end face 1143, in one embodiment provided in this disclosure, the second limiting member 115 can be formed in the form of a plate or sheet to avoid the problem of gaps between the shoulder strap 21 and the occupant due to the thick size of the second limiting member 115.

[0056] Furthermore, this disclosure does not limit the shape of the second limiting member 115. It can be formed as a triangle, a parallelogram, or a rectangle, trapezoid, sector, etc. The specific shape can be adapted according to actual needs.

[0057] According to the second aspect of this disclosure, such as Figures 3 to 8 As shown, a seat belt is provided, including a webbing 2, a retractor 3, a pretensioner 4, and a locking tongue assembly 1 as described above. One end of the webbing 2 is connected to the retractor 3, and the other end of the webbing 2 is connected to the pretensioner 4. The locking tongue assembly 1 is movably fitted onto the webbing 2. The seat belt provided by this disclosure has all the beneficial effects of the locking tongue assembly 1 described above, which will not be described in detail here.

[0058] According to a third aspect of this disclosure, a vehicle is provided, including the aforementioned locking tongue assembly 1 and the aforementioned seat belt. Similarly, the vehicle provided by this disclosure has all the beneficial effects of the aforementioned seat belt, which will not be described herein.

[0059] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0060] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0061] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A locking tongue assembly, characterized in that, It includes a locking tongue and a locking release mechanism. The locking tongue is connected to the webbing through the locking release mechanism. The webbing located between the locking tongue and the take-up device is a shoulder strap. The webbing located between the locking tongue and the pretensioner is a waist belt. The locking release mechanism is connected to the waist belt. The locking release mechanism has a locked state and a released state. In the released state, the locking release mechanism can release part of the webbing to reduce the distance between the intersection of the webbing and the locking release mechanism and the pretensioner, and make the shoulder strap fit snugly against the occupant.

2. The locking tongue assembly according to claim 1, characterized in that, The locking release mechanism includes a sleeve that is slidably fitted onto the webbing, and a locking tongue connected to the end of the sleeve opposite to the pretensioner. In the released state, the sleeve can be at least partially torn.

3. The locking tongue assembly according to claim 2, characterized in that, The sleeve includes a first sidewall and a second sidewall, which are arranged opposite to each other and together enclose a cylindrical structure. A tear-guiding structure is formed at the connection between the first sidewall and the second sidewall, and the tear-guiding structure extends along the length direction of the sleeve.

4. The locking tongue assembly according to claim 2, characterized in that, The locking and releasing structure further includes a first limiting member, which is connected to one end of the sleeve near the locking tongue. The first limiting member can be opened when subjected to a force exceeding a predetermined threshold.

5. The locking tongue assembly according to claim 4, characterized in that, The first limiting component includes a limiting band, a limiting pin, and a driving component. The limiting pin is connected to both ends of the limiting band and is used to tighten the limiting band around the outer periphery of the sleeve. The driving component can drive the limiting pin to move to unlock the limiting pin from locking the limiting band.

6. The locking tongue assembly according to any one of claims 2-5, characterized in that, The locking release mechanism further includes a second limiting member, which is connected to one end of the sleeve away from the locking tongue, and the second limiting member is sleeved on the outer periphery of the webbing; When the locking release mechanism is in the released state, the intersection is formed at the junction of the webbing and the second limiting member.

7. The locking tongue assembly according to claim 6, characterized in that, The end of the second limiting member near the latch is formed as an inclined end face. When the webbing comes into contact with the inclined end face, it reverses direction so that the shoulder strap located above the second limiting member fits against the occupant.

8. The locking tongue assembly according to claim 7, characterized in that, The inclination angle of the inclined end face is 15°~90°.

9. A seat belt, characterized in that, The device includes a webbing, a retractor, a pretensioner, and a locking tongue assembly according to any one of claims 1-8, wherein one end of the webbing is connected to the retractor, the other end of the webbing is connected to the pretensioner, and the locking tongue assembly is movably fitted onto the webbing.

10. A vehicle, characterized in that, Includes the locking tongue kit of any one of claims 1-8 or the seat belt of claim 9.

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