Vehicle seat belt

Abstract

A vehicle seat belt (100), comprising: a webbing (10) having a retractor end (11), the retractor end (11) being wound around a first retractor (300) on an outer side of a vehicle seat (200), the webbing (10) being provided with a first latch plate (30), and the first latch plate (30) being configured for snapping into a first buckle (500) on an inner lower side of the vehicle seat (200); a tensioning strap (20), a first end (21) of the tensioning strap (20) being fixedly connected between the retractor end (11) of the webbing (10) and the first latch plate (30), and a second end (22) of the tensioning strap (20) being movably mounted on the outer side of the vehicle seat (200) so as to change a length of the tensioning strap (20). When the first latch plate (30) on the webbing (10) is snapped into the first buckle (500) on the inner lower side of the vehicle seat (200), the webbing (10) forms a shoulder strap (13) spanning diagonally from outer-upper to inner-lower, and a lap strap (14) spanning horizontally. When the vehicle is involved in a collision or stops abruptly, and the upper body of an occupant exhibits a forward lunge and downward curling motion, the varying-length tensioning strap (20) pulls on the shoulder strap (13) formed by the webbing (10) such that the shoulder strap (13) is away from the neck of the occupant, thereby eliminating or delaying the possibility of the shoulder strap (13) interfering with the neck of the occupant.

Description

Vehicle seat belts Technical Field

[0001] This invention relates to the field of vehicle seat belt technology, and more particularly to a vehicle seat belt with a shortenable tension band. Background Technology

[0002] During a frontal collision, passengers in a reclining seat position are at risk of neck and shoulder seatbelt interference, which could result in neck injury or even death.

[0003] In related technologies, some use additional webbing to adjust the position of the shoulder straps of the webbing. However, the additional webbing only acts as a height adjuster and cannot effectively eliminate the risk of interference between the neck and shoulder seat belt webbing during a collision for passengers in reclined seats. Summary of the Invention

[0004] To overcome the problems existing in the related technology, this disclosure provides a vehicle seat belt designed to change the shoulder belt route during a collision in order to eliminate or delay the possibility of interference between the shoulder belt and the occupant's neck.

[0005] According to a first aspect of the present disclosure, a vehicle seat belt is provided, comprising: a webbing having a retractable end, the retractable end being wound around a first retractor on the outside of a vehicle seat, the webbing having a first latch for engaging with a first buckle on the lower inside of the vehicle seat; and a tension band, a first end of which is fixedly connected between the retractable end of the webbing and the first latch, and a second end of which is movably mounted on the outside of the vehicle seat to change the length of the tension band.

[0006] In some embodiments, the second end of the tension band is wound into a second retractor on the underside of the vehicle seat.

[0007] In some embodiments, a second latch is provided at the second end of the tension band. The second latch is used to engage with a second buckle located on the lower outer side of the vehicle seat. By shortening the steel wire rope connected to the second buckle, the second end of the tension band becomes movable and the tilt angle of the webbing is changed.

[0008] In some embodiments, the tension band and the webbing are separate components, and the tension band is made of the same material as the webbing.

[0009] In some embodiments, the webbing also has a fixed end that is fixed to the outer lower side of the vehicle seat, and the first buckle and the fixed end define a waistband that crosses the webbing.

[0010] In some embodiments, the webbing further has a fixed end, which can be fixedly connected between the winding end of the webbing and the first locking tongue. The webbing is further provided with a second locking tongue between the first locking tongue and the fixed end. The second locking tongue is used to engage with a second buckle located on the lower outer side of the vehicle seat. The fixed end and the second locking tongue define the tension band. The fixed end is the first end of the tension band, and the second locking tongue is the second end of the tension band.

[0011] In some embodiments, the first latch and the second latch are defined as a waistband spanning across the webbing.

[0012] In some embodiments, the first end of the tension band is fixedly connected to the webbing by sewing.

[0013] In some embodiments, the webbing is further provided with a guide ring located on the upper outer side of the vehicle seat. The guide ring and the first locking tongue define the shoulder strap of the webbing, wherein the first end of the tension band can be fixedly connected to the middle of the shoulder strap.

[0014] In some embodiments, after the passenger wears the seat belt, the first end of the tension strap is fixedly connected to the webbing in front of the passenger's chest, and the second end of the tension strap passes under the passenger's armpit and is movably connected to the outside of the vehicle seat, so that the tension strap is positioned diagonally across the passenger's chest.

[0015] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects: when the first locking tongue on the webbing is engaged with the first buckle on the lower side of the vehicle seat, the webbing forms a shoulder strap and a waist belt that cross diagonally from the upper outer side to the lower inner side. When the vehicle collides or stops suddenly, and the upper body of the occupant is in a forward or downward curling motion, the shoulder strap formed by the webbing is pulled away from the occupant's neck by the tension band of variable length, so as to eliminate or delay the possibility of the shoulder strap interfering with the occupant's neck. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0017] Figure 1 is a schematic diagram illustrating a vehicle seat belt according to an exemplary embodiment;

[0018] Figure 2 is a schematic diagram illustrating a vehicle seat belt according to another exemplary embodiment;

[0019] Figure 3 is a structural schematic diagram of the seat belts shown in Figures 1 and 2 when applied to a vehicle seat frame;

[0020] Figure 4 is a structural diagram of the occupants wearing seat belts. Detailed Implementation

[0021] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0022] To address the aforementioned technical problems, this disclosure provides a vehicle seat belt 100. As shown in Figures 1 to 4, the seat belt 100 is applicable to various vehicle seats 200, including but not limited to cars, trucks, buses, and trains.

[0023] The seat belt 100 is used in the seat belt system. In addition to the seat belt 100, the seat belt 100 system also includes a retractor, guide ring, locking device, etc.

[0024] Specifically, the seat belt 100 includes a webbing 10, which is typically made of synthetic fibers such as nylon or polyester and has a specific width and thickness to ensure sufficient strength and elongation.

[0025] The retractor includes a first retractor 300, which is a device for adjusting the length of the webbing 10 and for winding up the webbing 10 when not in use. It can adjust the tightness of the seat belt 100 according to the occupant's sitting posture and body size to ensure that the passenger can be effectively secured in an emergency.

[0026] The first retractor 300 is typically located on the lower or upper outer side of the vehicle frame, and the guide ring (not shown) is typically fixed to the upper outer end of the vehicle seat 200. The webbing 10 typically includes a take-up end 11 and a fixed end 12. The take-up end 11 of the webbing 10 is wound inside the first retractor 300, and the fixed end 12 passes through the guide ring.

[0027] The seat belt 100 also includes a first latch 30, which is slidably fitted onto the webbing 10. The seat belt system also has a first buckle 500 on the inner lower side of the vehicle seat 200 for the first latch 30 to engage. When the first retractor 300 releases the webbing 10 and the first latch 30 engages with the first buckle 500, the webbing 10 forms a shoulder strap 13 that crosses diagonally from the outer upper to the inner lower between the guide ring and the first latch 30. When the passenger wears the seat belt 100, the shoulder strap 13 can be diagonally restrained across the passenger's chest from the neck to the waist.

[0028] As shown in Figures 1 and 2, the seat belt 100 of this disclosure also includes a tension strap 20. The tension strap 20 includes a first end 21 and a second end 22. The first end 21 of the tension strap 20 can be fixedly connected to the shoulder strap 13. More specifically, the first end 21 of the tension strap 20 can be fixedly connected to the middle of the shoulder strap 13. Therefore, after the occupant wears the seat belt 100, the fixed connection position between the first end 21 of the tension strap 20 and the webbing 10 is located in front of the passenger's chest.

[0029] In the first embodiment, as shown in Figures 1 and 2, the tension band 20 and the webbing 10 are separately arranged, and further, the material of the tension band 20 is the same as that of the webbing 10.

[0030] The tension band 20, made of the same material as the webbing 10, ensures compatibility in strength, abrasion resistance, and comfort, avoiding performance inconsistencies caused by material differences. This improves the reliability of the entire seatbelt system and passenger comfort. Using the same material simplifies the production process and reduces supply chain complexity and costs associated with a wide variety of materials. During maintenance and replacement, using replacement parts made of the same material reduces inventory variety, facilitates rapid repairs, and lowers maintenance costs and time.

[0031] The first end 21 of the tension band 20 can be sewn to the middle of the shoulder strap 13. This not only ensures a secure connection but also provides sufficient flexibility to allow for appropriate adjustments if necessary. This connection method is more durable than adhesive or mechanical fastening and can withstand repeated use and potential impact loads.

[0032] In some embodiments, the second end 22 of the tension strap 20 is movably mounted on the outside of the vehicle seat 200 to change the length of the tension strap 20. In the event of a collision or sudden stop of the vehicle, when the occupant's upper body is in a forward or downward bending motion, the variable-length tension strap 20 pulls the shoulder strap 13 away from the occupant's neck, thereby eliminating or delaying the possibility of interference between the shoulder strap 13 and the occupant's neck.

[0033] The second end 22 of the tensioning strap 20 can be installed on the outer middle side of the vehicle seat 200 or on the outer lower side of the vehicle seat 200.

[0034] In the first embodiment of this disclosure, as shown in FIG1, the second end 22 of the tension strap 20 is installed on the lower outer side of the vehicle seat 200. Therefore, after the occupant wears the seat belt 100, the fixed connection position of the first end 21 of the tension strap 20 and the shoulder strap 13 is located in front of the passenger's chest. As shown in FIG4, the second end 22 of the tension strap 20 passes through the passenger's armpit and is movably connected to the lower outer side of the vehicle seat 200, so that the tension strap 20 as a whole is also located in front of the passenger's chest in a diagonal manner.

[0035] Thus, the tension strap 20 and its connection point with the shoulder strap 13 avoid the sensitive area of ​​the neck, significantly reducing the risk of neck injury during a collision. Furthermore, when the passenger wears the seatbelt 100 correctly, the shoulder strap 13 and tension strap 20 together form a roughly inverted Y-shaped structure. The shoulder strap 13 and tension strap 20, located between the first end 21 of the tension strap 20 and the first locking tongue 30, are distributed diagonally on the vehicle seat 200, particularly on both sides of the passenger. This diagonal distribution effectively disperses the impact force at the moment of collision, significantly reducing the direct impact of the seatbelt 100 on the passenger's body.

[0036] In the first embodiment, the seatbelt system further includes a second retractor 400, which is disposed on the lower outer side of the vehicle seat 200, and the second end 22 of the tension strap 20 is wound within the second retractor 400. The length of the tension strap 20 can be changed by winding and releasing the second retractor 400. By changing the length of the tension strap 20, the position of the shoulder strap 13 relative to the occupant's neck can be altered when worn by passengers of different body types, avoiding interference between the shoulder strap 13 and the neck. Furthermore, in the event of a vehicle collision, the second retractor 400 can instantly limit the length of the tension strap 20 or tighten the tension strap 20, thereby changing the tilt angle of the shoulder strap 13 and preventing interference between the shoulder strap 13 and the neck.

[0037] In another embodiment, the second end 22 of the tension band 20 is movably mounted on the lower outer side of the vehicle seat 200 via a second latch 40 and a second buckle. Specifically, the seat belt 100 may also include a second latch 40, which is fixedly disposed at the second end 22 of the tension band 20. The seat belt system also includes a lumbar pretensioner (PLP), which includes a second buckle and a steel cable connected to the end of the second buckle. The lumbar pretensioner is located on the lower outer side of the vehicle seat 200 (or may be fixed to the vehicle frame), and the second buckle of the lumbar pretensioner is used for the second latch 40 to engage.

[0038] When a vehicle collision occurs, the waist pretensioner can instantly shorten the steel cable, thereby pulling the second end 22 of the tensioning belt 20, which in turn pulls the shoulder strap 13 and changes the connection position of the first end 21 of the tensioning belt 20 and the shoulder strap 13, ultimately changing the tilt angle of the webbing 10 so that the shoulder strap 13 avoids interference with the neck.

[0039] Therefore, the seat belt 100 in the first embodiment can not only effectively fix the passenger and reduce body displacement, but also adjust the tilt angle of the shoulder strap 13 in real time to ensure that the shoulder strap 13 avoids the neck, thus avoiding direct contact between the shoulder strap 13 and the neck during a collision, thereby greatly reducing the probability of neck injury.

[0040] Furthermore, in the first embodiment, the fixed end 12 of the webbing 10 passes through the guide ring 600 and the first locking tongue 30 and is fixed to the lower outer side of the vehicle seat 200. When the occupant wears the seat belt 100, the first buckle 500 and the fixed end 12 define the lap belt 14 that crosses the webbing 10 along the lower inner and lower outer sides. The lap belt 14 forms a stable loop around the passenger's waist, providing reliable restraint and firmly securing the passenger to the seat. The lap belt 14 can effectively fix the passenger's lower body, reduce forward displacement of the body, and protect the passenger from injury.

[0041] In the second embodiment, as shown in FIG2, after the fixed end 12 of the webbing 10 passes through the guide ring 600 and the first locking tongue 30, it is no longer directly fixed to the lower outer side of the vehicle seat 200, but is directly fixedly connected between the winding end 11 of the webbing 10 and the first locking tongue 30. That is, the fixed end 12 of the webbing 10 is directly fixed to the body of the webbing 10, especially fixedly connected to the middle of the shoulder strap 13, so that the webbing 10 itself forms a ring structure 15. The fixed end 12 of the webbing 10 can also be fixedly connected to the middle of the shoulder strap 13 by sewing, ensuring the firmness and reliability of the connection.

[0042] Furthermore, the seat belt 100 also includes a second locking tongue 40, which may be located downstream of the first locking tongue 30. Both the first locking tongue 30 and the second locking tongue 40 are fitted into the annular structure 15 formed by the aforementioned webbing 10. The seat belt system also includes a lumbar pretensioner (PLP), which includes a second buckle and a steel cable connected to the end of the second buckle. The lumbar pretensioner is located on the lower outer side of the vehicle seat 200 (or may be fixed to the vehicle frame), and the second buckle of the lumbar pretensioner is used for the second locking tongue 40 to engage.

[0043] Thus, when the occupant wears the seatbelt 100, the first latch 30 can be engaged with the first buckle 500 located on the lower inner side of the vehicle seat 200, and the second latch 40 can be engaged with the second buckle (not shown) located on the lower outer side of the vehicle seat 200. After the passenger wears the seatbelt 100, the connection between the first latch 30, the second latch 40, and the fixed end 12 and the shoulder strap 13 pulls the aforementioned annular structure 15 into a triangular annular structure 15, and the overall webbing 10 also forms a roughly inverted Y-shaped structure. At this time, the webbing 10 between the fixed end 12 and the second latch 40 can be defined as the tension band 20, the fixed end 12 can be the first end 21 of the tension band 20, and the second latch 40 can be the second end 22 of the tension band 20. The first latch 30 and the second latch 40 can be defined as the lap belt 14 spanning across.

[0044] It can be seen that the first locking tongue 30 and the second locking tongue 40 are respectively engaged in the first latch 500 and the second latch on both sides of the vehicle seat 200, so that the tension band 20 formed by the webbing 10 itself and the shoulder strap 13 between the fixed end 12 and the first locking tongue 30 can also be distributed on both sides of the passenger in an oblique layout.

[0045] At the moment of a vehicle collision, the lumbar pretensioner located on the lower outer side of the vehicle seat 200 can instantly shorten the steel cable, thereby pulling the second end 22 of the second locking tongue 40, which in turn pulls the shoulder strap 13 and changes the connection position of the first end 21 of the tensioning band 20 and the shoulder strap 13, ultimately changing the tilt angle of the webbing 10 so that the shoulder strap 13 avoids interference with the neck.

[0046] It should be noted that in the second embodiment, since the fixed end 12 of the webbing 10 is fixed on the body of the webbing 10 to form an annular structure 15, and the length of the annular structure 15 is fixed, and since the first locking tongue 30 and the second locking tongue 40 are not fixed on the webbing 10, but can move along the webbing 10, after the waist pretensioner pulls the second locking tongue 40, the second locking tongue 40 may slide along the webbing 10, thereby changing the length of the tensioning band 20, the length of the waistband 14, and the length between the fixed end 12 and the first locking tongue 30.

[0047] The mobility of the ring structure 15 and the first locking tongue 30 and the second locking tongue 40 located on the ring structure 15 allows the seat belt system to better adapt to the body shape and sitting posture of different passengers. While ensuring that the shoulder strap 13 is tightened away from the neck, it can not only ensure that the seat belt 100 is neither too tight nor too loose, but also ensure a more comfortable feeling when worn for a long time.

[0048] Upon impact, the seatbelt system can quickly tighten, effectively dispersing the impact force by changing the length of the tension band 20 and the lap belt 14, reducing the direct impact on the passenger's body, especially providing more effective protection for the neck and shoulders. This dynamic adjustment capability significantly improves the protective effect of the seatbelt 100 at the moment of impact.

[0049] Based on the same inventive concept, this disclosure provides a vehicle seat 200. The specific manner in which the functions of the vehicle seat 200 in the above embodiments are implemented has been described in detail in the embodiments relating to the seat belt 100 of the vehicle seat 200, and will not be elaborated here.

[0050] It is further understood that the terms "first," "second," etc., are used to describe various structures, but these structures should not be limited to these terms. These terms are only used to distinguish structures of the same type from one another and do not indicate a specific order or degree of importance. In fact, the expressions "first," "second," etc., are completely interchangeable. For example, without departing from the scope of this disclosure, a first structure can also be called a second structure, and similarly, a second structure can also be called a first structure.

[0051] It is further understood that the terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment and 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.

[0052] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following scope of claims.

[0053] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A vehicle seat belt (100), characterized in that, include: The webbing (10) has a winding end (11) which is wound around a first winding device (300) on the outside of the vehicle seat (200). The webbing (10) is provided with a first locking tongue (30) which is used to engage with a first latch (500) on the lower inside of the vehicle seat (200). A tensioning strap (20) is provided, the first end (21) of which is fixedly connected between the winding end (11) of the webbing (10) and the first locking tongue (30), and the second end (22) of which is movably mounted on the outside of the vehicle seat (200) to change the length of the tensioning strap (20).

2. The vehicle seat belt (100) according to claim 1, characterized in that, The second end (22) of the tensioning strap (20) is wound into a second retractor (400) on the lower side of the vehicle seat (200).

3. The vehicle seat belt (100) according to claim 1, characterized in that, A second latch (40) is provided at the second end (22) of the tension band (20). The second latch (40) is used to engage with the second buckle located on the lower side of the vehicle seat (200). By shortening the steel wire rope connected to the second buckle, the second end (22) of the tension band (20) can be made movable and the tilt angle of the webbing (10) can be changed.

4. The vehicle seat belt (100) according to claim 2 or 3, characterized in that, The tensioning band (20) and the webbing (10) are separate components, and the material of the tensioning band (20) is the same as that of the webbing (10).

5. The vehicle seat belt (100) according to claim 2 or 3, characterized in that, The webbing (10) also has a fixing end (12) fixed to the outer lower side of the vehicle seat (200), and the first buckle (500) and the fixing end (12) define a waist belt (14) that crosses the webbing (10).

6. The vehicle seat belt (100) according to claim 1, characterized in that, The webbing (10) also has a fixed end (12), which can be fixedly connected between the take-up end (11) of the webbing (10) and the first locking tongue (30). The webbing (10) is further provided with a second locking tongue (40) between the first locking tongue (30) and the fixed end (12). The second locking tongue (40) is used to engage with the second buckle located on the lower outer side of the vehicle seat (200). The fixed end (12) and the second locking tongue (40) define the tension band (20). The fixed end (12) is the first end (21) of the tension band (20), and the second locking tongue (40) is the second end (22) of the tension band (20).

7. The vehicle seat belt (100) according to claim 6, characterized in that, The first latch (30) and the second latch (40) are defined as the waistband (14) that crosses the webbing (10).

8. The vehicle seat belt (100) according to any one of claims 2, 3 or 6, characterized in that, The first end (21) of the tensioning band (20) is fixedly connected to the webbing (10) by sewing.

9. The vehicle seat belt (100) according to claim 1, characterized in that, The webbing (10) is also provided with a guide ring, which is located on the upper outer side of the vehicle seat (200). The guide ring and the first locking tongue (30) define the shoulder strap of the webbing (10). The first end (21) of the tensioning band (20) can be fixedly connected to the middle of the shoulder strap.

10. The vehicle seat belt (100) according to claim 1, characterized in that, After the passenger wears the seat belt (100), the first end (21) of the tension strap (20) is fixedly connected to the webbing (10) in front of the passenger's chest, and the second end (22) of the tension strap (20) passes under the passenger's armpit and is movably connected to the outside of the vehicle seat (200), so that the tension strap (20) is located in front of the passenger's chest in a diagonal manner.

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