Adjustable safety belt of automobile seat

Abstract

The utility model relates to the technical field of automobile safety, in particular to an adjustable automobile seat safety belt which comprises a seat body, a woven belt, a retractor, a sliding seat, a rotating part and a fixing mechanism. The retractor is arranged in the seat body, one end of the braid is wound on the retractor, and the other end of the braid is fixedly connected with the seat body; the sliding seat is in sliding fit with the seat body; the fixing mechanism is used for fixing the sliding seat; the rotating part is rotationally connected with the sliding seat, a threading groove for a braid to penetrate through is formed in the rotating part, and the braid penetrates through the threading groove and is in sliding fit with the rotating part; a spring bolt is sleeved on the braid, the spring bolt and the braid slide relatively, a lock catch is arranged on the seat body, and the spring bolt is matched with the lock catch in an inserted mode. According to the safety belt, the position and tightness of the safety belt can be adjusted in a rotating and sliding mode, the requirements of passengers of different body types are met, and the comfort and safety of the safety belt are improved.

Description

Technical Field

[0001] The present application relates to the technical field of automobile safety, and in particular to an adjustable safety belt for an automobile seat. Background Art

[0002] With the rapid development of the automobile industry and the improvement of people's awareness of driving safety, the design and function optimization of car seat belts as important passive safety devices have received widespread attention. The position and tightness adjustment range of traditional seat belts are limited and cannot meet the needs of different passengers. Especially in scenarios such as family cars or shared cars, the body shapes of passengers vary greatly, which puts higher requirements on the comfort of seat belts. Therefore, the development of an adjustable car seat belt has become an important direction for the development of the industry.

[0003] Most of the car seat belts in the related art adopt a fixed design, which mainly includes a seat body, a webbing, a retractor, a fixing buckle, etc. One end of the webbing is wound on the retractor, and the other end is connected to the seat body through the fixing buckle.

[0004] The car seat belts in the related art have the following defects: the position and tightness adjustment range of the seat belts are limited, and they cannot be accurately adjusted according to the needs of passengers of different body sizes, causing some passengers to feel uncomfortable when wearing the seat belts or unable to obtain the best protection effect. Utility Model Content

[0005] In order to facilitate adjusting the tightness of a safety belt according to the needs of passengers of different body sizes, the present application provides an adjustable safety belt for a car seat.

[0006] The adjustable safety belt of a car seat provided in the present application adopts the following technical solution:

[0007] A safety belt for an adjustable car seat comprises a seat body, a webbing, a retractor, a sliding seat, a rotating member and a fixing mechanism; the retractor is arranged inside the seat body, one end of the webbing is wound around the retractor, and the other end of the webbing is fixedly connected to the seat body; the sliding seat is slidingly matched with the seat body, and the fixing mechanism is used to fix the sliding seat; the rotating member is rotatably connected with the sliding seat, a guide groove for the webbing to pass through is provided on the rotating member, the webbing passes through the guide groove, and the webbing is slidingly matched with the rotating member; a locking tongue is sleeved on the webbing, the locking tongue and the webbing slide relatively, a lock buckle is provided on the seat body, and the locking tongue is plug-fitted with the lock buckle.

[0008] By adopting the above technical solutions, the seat body not only provides a comfortable riding environment, but also has built-in key safety components such as retractors, ensuring the stability and reliability of the seat belt system; the webbing, as the main load-bearing part of the seat belt, can effectively limit the movement of the passenger's body in a collision and reduce impact damage. Its softness also ensures comfort when wearing and avoids the feeling of restraint for the passenger; the retractor is built into the seat body and automatically manages the tightness of the webbing; when the vehicle is driving normally, the retractor can keep the webbing in a moderately tight state, which does not hinder the passenger's activities, and can quickly lock the webbing in an emergency to prevent the passenger from rushing forward; the sliding seat allows the seat belt to It slides along the seat within a certain range to adapt to the needs of passengers of different body shapes and sitting postures; the fixing mechanism ensures that the sliding seat can be firmly locked in the designated position when needed, preventing accidental sliding during emergency braking or collision, and further enhancing the stability of the seat belt; the design of the rotating part enables the webbing to rotate flexibly when passing through the guide groove, reducing the sense of restraint of the webbing on the body when the passenger turns around or adjusts his sitting posture; at the same time, the lock tongue and the lock buckle on the seat body are tightly plugged in, ensuring that the seat belt is firmly locked in an emergency, effectively preventing the passenger from being thrown out of the seat; this quick connection and locking mechanism is crucial to increasing the passenger's chance of survival in an emergency.

[0009] Optionally, the fixing mechanism includes a guide rail, a spring, a clamping seat and a driving seat; the guide rail is fixed to the seat body, and the sliding seat is slidingly matched with the guide rail; a guide hole is provided on the sliding seat, and the clamping seat passes through the guide hole, and the clamping seat is slidingly matched with the guide hole; the spring is located between the clamping seat and the sliding seat, one end of the spring is clamped against the clamping seat, and the other end of the spring is clamped against the sliding seat; the driving seat is slidingly matched with the sliding seat, and a driving groove is provided on the driving seat, a driving inclined surface is provided in the driving groove, a driving flange is provided on the clamping seat, and the driving flange passes through the driving groove, and the elastic force of the spring on the clamping seat causes the driving flange to abut against the driving inclined surface of the driving groove.

[0010] By adopting the above technical scheme, the guide rail is fixed on the seat body, providing a stable and precise sliding path for the sliding seat, and the sliding cooperation between the sliding seat and the guide rail ensures the smoothness and accuracy of the seat belt when adjusting the position; through the elastic force of the spring, the abutment seat is tightly pressed against the sliding seat, which not only enhances the stability of the sliding seat on the guide rail, but also reduces the displacement caused by vibration or sudden acceleration / deceleration; the driving inclined surface interacts with the driving flange, so that the abutment seat is more closely abutted against the guide rail under the action of the spring elastic force, thereby achieving a stable locking of the sliding seat; when the length of the seat belt needs to be adjusted, the passenger first pushes the driving seat by hand, and the driving seat slides in a specific direction on the seat body, and this movement directly drives the relative position change of the driving groove and the driving inclined surface connected thereto; as the driving seat moves, the driving inclined surface in the driving groove begins to interact with the driving flange on the abutment seat; The design of the dynamic inclined surface will apply an oblique force to the driving flange, and this force produces a component in the horizontal direction, so that the clamping seat overcomes the elastic force of the spring and gradually separates from the guide rail; in this process, the spring is compressed and stores elastic potential energy; when the clamping seat is completely out of contact with the guide rail, the sliding seat loses its fixed constraint on the guide rail and becomes free to slide; at this time, the passenger can easily push the sliding seat, thereby driving the position change of the webbing on the seat, thereby adjusting the length of the webbing; after completing the adjustment of the webbing length, the passenger releases the thrust on the driving seat; at this time, under the action of the elastic potential energy of the spring, the spring quickly recovers its deformation and pushes the clamping seat back to the guide rail; due to the design of the driving flange 71 and the driving inclined surface, the clamping seat will be automatically guided to the locking position when it contacts the guide rail, and will be tightly abutted against the guide rail under the continuous elastic force of the spring, thereby realizing the re-locking of the sliding seat.

[0011] Optionally, a strip-shaped guide groove is provided on the sliding seat, the driving flange passes through the guide groove, and the driving flange is slidingly matched with the guide groove.

[0012] By adopting the above technical solution, the guide groove has a guiding effect on the driving flange, thereby increasing the sliding stability of the driving flange and thus increasing the sliding stability of the driving seat.

[0013] Optionally, a first limiting groove is formed on the sliding seat, a second limiting groove is formed on the abutting seat, one end of the spring is located in the first limiting groove, and the other end of the spring is located in the second limiting groove.

[0014] By adopting the above technical solution, the design of the first limiting groove and the second limiting groove effectively prevents the spring from falling off or shifting during use, thereby ensuring the normal operation of the fixing mechanism.

[0015] Optionally, a plurality of positioning holes are provided on the guide rail, and the plurality of positioning holes are arranged at intervals along the length direction of the guide rail; when the abutment seat moves to the position of the positioning hole, the elastic force of the spring drives the abutment seat to move toward the direction close to the guide rail, so that the end of the abutment seat is located in the positioning hole.

[0016] By adopting the above technical solution and setting a plurality of positioning holes, passengers can accurately adjust the position of the sliding seat as needed to achieve personalized adjustment of the seat belt; the cooperation between the positioning holes and the abutment seat ensures the stability of the sliding seat during the adjustment process and prevents safety hazards caused by accidental movement.

[0017] Optionally, a guide bevel block is provided in the positioning hole, one end of the guide bevel block is fixedly connected to one side of the positioning hole, and an angle exists between the guide bevel block and the guide rail.

[0018] By adopting the above technical solution, when the length of the seat belt needs to be adjusted, the passenger pushes the sliding seat in the direction close to the guide bevel. Due to the existence of the guide bevel, the sliding seat will drive the abutment seat to gradually rise along the inclined surface of the guide bevel during the movement. This rising action causes the abutment seat to be gradually "guided" out of the positioning hole and finally slide onto the surface of the guide rail. In this process, although the spring is compressed, its elastic force is gradually overcome by the inclined surface of the guide bevel, thereby realizing the unlocking between the sliding seat and the guide rail; once the abutment seat is completely separated from the positioning hole and contacts the surface of the guide rail, the sliding seat loses its original fixed constraint and can slide freely along the guide rail. At this time, the passenger can easily push the sliding seat to the desired position, and then adjust the length of the webbing; after completing the adjustment of the webbing length, the passenger stops pushing the sliding seat. At this time, under the action of the elastic potential energy of the spring, the spring quickly recovers its deformation and pushes the abutment seat to approach the positioning hole of the guide rail again. Due to the angle design between the guiding bevel block and the guide rail, the abutting seat will be automatically guided into the positioning hole when it contacts the guiding bevel block, and will be tightly abutted against the guide rail under the continuous elastic force of the spring, thereby achieving re-locking of the sliding seat.

[0019] Optionally, the angle is 10°-80°.

[0020] By adopting the above technical solution and reasonably setting the angle, passengers can feel appropriate resistance and feedback when adjusting the seat belts, thereby improving the accuracy and comfort of the adjustment; the design of different angles can meet the needs of different car models and passengers, thereby improving the applicability and market competitiveness of the product.

[0021] Optionally, a push-pull groove is provided on the driving seat.

[0022] By adopting the above technical solution, the design of the push-pull groove enables passengers to easily grasp and push-pull the drive seat when adjusting the seat belt, thereby improving operational convenience and user experience; the push-pull groove can also be integrated into the seat belt design as a decorative element to enhance the overall aesthetics and grade of the product.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The seat body not only provides a comfortable riding environment, but also has built-in key safety components such as retractors to ensure the stability and reliability of the seat belt system; the webbing, as the main load-bearing part of the seat belt, can effectively limit the movement of the passenger's body in a collision and reduce impact damage. Its softness also ensures comfort when wearing and avoids the feeling of restraint for the passenger; the retractor is built into the seat body and automatically manages the tightness of the webbing; when the vehicle is driving normally, the retractor can keep the webbing in a moderately tight state, which does not hinder the passenger's activities, and can quickly lock the webbing in an emergency to prevent the passenger from rushing forward; the sliding seat allows the seat belt to be adjusted within a certain range The inner edge of the seat slides to meet the needs of passengers of different body shapes and sitting postures; the fixing mechanism ensures that the sliding seat can be firmly locked in the designated position when needed, preventing accidental sliding during emergency braking or collision, and further enhancing the stability of the seat belt; the design of the rotating part allows the webbing to rotate flexibly when passing through the threading groove, reducing the sense of restraint of the webbing on the body when the passenger turns around or adjusts his sitting posture; at the same time, the lock tongue and the lock buckle on the seat body are tightly plugged together to ensure that the seat belt is firmly locked in an emergency, effectively preventing the passenger from being thrown out of the seat; this quick connection and locking mechanism is crucial to improving the passenger's chance of survival in an emergency;

[0025] 2. When the length of the seat belt needs to be adjusted, the passenger first pushes the drive seat with his hand, and the drive seat slides in a specific direction on the seat body. This movement directly drives the relative position change of the drive slot and the drive slope connected to it; as the drive seat moves, the drive slope in the drive slot begins to interact with the drive flange on the abutment seat; due to the design of the drive slope, it will apply an oblique force to the drive flange, and this force will produce a component in the horizontal direction, so that the abutment seat overcomes the elastic force of the spring and gradually detaches from the guide rail; in this process, the spring is compressed and the elastic potential energy is stored; when the abutment seat is completely in contact with the seat .... After the guide rail is out of contact, the sliding seat loses its fixed constraint on the guide rail and can slide freely; at this time, the passenger can easily push the sliding seat, thereby driving the position change of the webbing on the seat, thereby adjusting the length of the webbing; after completing the adjustment of the webbing length, the passenger releases the thrust on the driving seat; at this time, under the action of the elastic potential energy of the spring, the spring quickly recovers its deformation and pushes the abutting seat to approach the guide rail again; due to the design of the driving flange and the driving inclined surface, the abutting seat will be automatically guided to the locking position when it contacts the guide rail, and will be tightly abutted against the guide rail under the continuous elastic force of the spring, so that the sliding seat is locked again;

[0026] 3. Through the setting of multiple positioning holes, passengers can accurately adjust the position of the sliding seat as needed to achieve personalized adjustment of the seat belt; the cooperation between the positioning holes and the tightening seat ensures the stability of the sliding seat during the adjustment process and prevents safety hazards caused by accidental movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of an adjustable safety belt for a car seat in an embodiment of the present application.

[0028] Figure 2 It is a schematic diagram of the structure of the sliding seat, guide rail, spring, abutment seat and driving seat in the embodiment of the present application.

[0029] Figure 3 It is a schematic diagram of the assembly relationship of the sliding seat, the guide rail, the spring, the abutting seat and the driving seat in the embodiment of the present application.

[0030] Figure 4 It is a structural schematic diagram of the sliding seat from another perspective in the embodiment of the present application.

[0031] Figure 5 It is a schematic diagram of the structure of the abutment seat in the embodiment of the present application.

[0032] Figure 6 It is a structural schematic diagram of the guide rail from another perspective in the embodiment of the present application.

[0033] Description of reference numerals:

[0034] 1. Seat body; 11. Lock buckle; 2. Webbing; 21. Lock tongue; 3. Sliding seat; 31. Guide hole; 32. First limiting groove; 33. Guide groove; 4. Rotating member; 41. Guide groove; 5. Guide rail; 51. Positioning hole; 52. Guide bevel block; 6. Spring; 7. Abutment seat; 71. Drive flange; 72. Second limiting groove; 8. Drive seat; 81. Drive groove; 82. Drive bevel; 83. Push-pull groove. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-6 This application is described in further detail.

[0036] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be the common meanings understood by those skilled in the art to which this application belongs. The "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components.

[0037] The present application embodiment discloses an adjustable safety belt for a car seat. Figure 1 The adjustable safety belt of the automobile seat comprises a seat body 1, a webbing 2, a retractor and a fixing mechanism. Each of these parts has its own unique function and cooperates with each other to form a complete and efficient safety belt system.

[0038] Continue to refer to Figure 1 The seat body 1 not only provides a sitting and lying space for passengers, but also serves as a solid foundation for the safety belt system. The retractor is hidden inside the seat body 1. This design is both beautiful and practical. It can automatically retract and release the webbing 2 and flexibly adjust according to the needs of passengers. It not only protects the retractor from external damage, but also ensures the smooth winding of the webbing 2.

[0039] Continue to refer to Figure 1 One end of the webbing 2 is wound on the retractor, and the other end is firmly connected to the seat body 1. Through the automatic control of the retractor, the webbing 2 can maintain a moderate degree of tension, providing stable protection for the passenger.

[0040] Continue to refer to Figure 1 The design of the sliding seat 3 is one of the highlights of the entire system. The sliding cooperation between the sliding seat 3 and the seat body 1 gives the safety belt system extremely high adjustment flexibility. Passengers can easily adjust the position of the sliding seat 3 according to their body shape and sitting posture requirements, thereby changing the action point of the safety belt and achieving a personalized wearing experience. It is worth noting that in this embodiment, since the sliding seat 3 is slidably arranged inside the seat body 1, the seat body 1 can limit the sliding travel of the sliding seat 3.

[0041] Continue to refer to Figure 1 The rotational connection between the rotating member 4 and the sliding seat 3 further improves the comfort of the safety belt system. Specifically, the rotating member 4 is provided with a guide groove 41 that allows the webbing 2 to pass freely, and the webbing 2 and the rotating member 4 are slidably matched. This design ensures that the safety belt will not cause unnecessary restraint to the passengers while protecting their safety.

[0042] Continue to refer to Figure 1 A locking tongue 21 is sleeved on the webbing 2, and the locking tongue 21 slides relative to the webbing 2. A lock buckle 11 is provided on the seat body 1, and the locking tongue 21 and the lock buckle 11 are plugged and matched to form a locking mechanism of the webbing 2 system.

[0043] Reference Figure 2 and Figure 3 In this embodiment, the fixing mechanism includes a guide rail 5, a spring 6, a pressing seat 7 and a driving seat 8. The guide rail 5 is stably fixed on the seat body 1, providing a reliable moving path for the sliding seat 3 and the entire safety belt system. A guide hole 31 is provided on the sliding seat 3, and the pressing seat 7 passes through the guide hole 31. The pressing seat 7 slides with the guide hole 31. The spring 6 is located between the pressing seat 7 and the sliding seat 3, one end of the spring 6 presses against the pressing seat 7, and the other end of the spring 6 presses against the sliding seat 3; the driving seat 8 slides with the sliding seat 3, and a driving groove 81 is provided on the driving seat 8, and a driving inclined surface 82 is provided in the driving groove 81. A driving flange 71 is provided on the pressing seat 7, and the driving flange 71 passes through the driving groove 81. The elastic force of the spring 6 on the pressing seat 7 makes the driving flange 7 abut against the driving inclined surface 82 of the driving groove 81.

[0044] Continue to refer to Figure 2 and Figure 3, through the elastic force of the spring 6, the abutting seat 7 is tightly pressed against the sliding seat 3, which not only enhances the stability of the sliding seat 3 on the guide rail 5, but also reduces the displacement caused by vibration or sudden acceleration / deceleration; the driving inclined surface 82 interacts with the driving flange 71, so that the abutting seat 7 is more tightly abutted against the guide rail 5 under the elastic force of the spring 6, thereby realizing the stable locking of the sliding seat 3; when the seat belt length needs to be adjusted, the passenger first pushes the driving seat 8 by hand, and the driving seat 8 slides in a specific direction on the seat body 1. This movement directly drives the relative position change of the driving groove 81 and the driving inclined surface 82 connected thereto; as the driving seat 8 moves, the driving inclined surface 82 in the driving groove 81 begins to interact with the driving flange 71 on the abutting seat 7; due to the design of the driving inclined surface 82, it will exert an oblique force on the driving flange 71, and this force is in the horizontal direction. A component is generated on the upper surface, which makes the clamping seat 7 overcome the elastic force of the spring 6 and gradually separate from the guide rail 5; in this process, the spring 6 is compressed and the elastic potential energy is stored; when the clamping seat 7 is completely out of contact with the guide rail 5, the sliding seat 3 loses its fixed constraint on the guide rail 5 and becomes free to slide; at this time, the passenger can easily push the sliding seat 3, thereby driving the position change of the webbing 2 on the seat, thereby adjusting the length of the webbing 2; after completing the adjustment of the length of the webbing 2, the passenger releases the thrust on the driving seat 8; at this time, under the action of the elastic potential energy of the spring 6, the spring 6 quickly recovers its deformation and pushes the clamping seat 7 to approach the guide rail 5 again; due to the design of the driving flange 71 and the driving inclined surface 82, the clamping seat 7 will be automatically guided to the locking position when it contacts the guide rail 5, and will be tightly abutted against the guide rail 5 under the continuous elastic force of the spring 6, so as to achieve the re-locking of the sliding seat 3.

[0045] Continue to refer to Figure 2 and Figure 3 The two sides of the sliding seat 3 are provided with strip-shaped guide grooves 33, and the two driving flanges 71 pass through the two guide grooves 33 respectively, and the driving flanges 71 slide and cooperate with the guide grooves 33. The guide grooves 33 guide the driving flanges 71, increase the sliding stability of the driving flanges 71, and thus increase the sliding stability of the driving seat 8.

[0046] Reference Figure 4 and Figure 5 Considering the stability and reliability of the spring 6, a first limiting groove 32 is provided on the sliding seat 3, and a second limiting groove 72 is provided on the pressing seat 7. One end of the spring 6 is located in the first limiting groove 32, and the other end of the spring 6 is located in the second limiting groove 72. The first limiting groove 32 and the second limiting groove 72 not only effectively prevent the spring 6 from falling off or shifting during use, but also further ensure the normal operation of the fixing mechanism.

[0047] Reference Figure 6A plurality of positioning holes 51 are arranged at intervals along the length direction of the guide rail 5, providing passengers with a variety of position options. When the abutting seat 7 moves to the position of a certain positioning hole 51, the elastic force of the spring 6 pushes it to be tightly embedded in the positioning hole 51, thereby achieving accurate fixation of the sliding seat 3.

[0048] Continue to refer to Figure 6 A guide bevel 52 is provided in the positioning hole 51, one end of the guide bevel 52 is fixedly connected to one side of the positioning hole 51, and there is an angle between the guide bevel 52 and the guide rail 5. The inclined surface of the guide bevel 52 allows the sliding seat 3 to be smoother during the unlocking and locking process. When the sliding seat 3 slides to a position corresponding to a certain positioning hole 51, the guide bevel 52 will guide the abutting seat 7 to smoothly fit into the hole along the inclined surface, greatly improving the convenience and stability of the seat belt adjustment. At the same time, the angle between the guide bevel and the plane of the guide rail 5 is carefully designed to be within the range of 10° to 80°. This setting allows passengers to feel appropriate resistance when adjusting the seat belt, which not only improves the accuracy of the operation, but also ensures the comfort of use.

[0049] Reference Figure 2 and Figure 3 In order to facilitate the operation of the passengers, a push-pull groove 83 is specially provided on the driving seat 8. This humanized design enables the passengers to operate more labor-savingly and accurately when pushing the driving seat 8.

[0050] The implementation principle of the above embodiment is as follows: the seat body 1 not only provides a comfortable riding environment, but also has built-in key safety components such as a retractor to ensure the stability and reliability of the seat belt system; the webbing 2, as the main load-bearing part of the seat belt, can effectively limit the movement of the passenger's body during a collision and reduce impact damage. Its softness also ensures comfort when wearing and avoids the feeling of restraint for the passenger; the retractor is built into the seat body 1 to automatically manage the tightness of the webbing 2; when the vehicle is driving normally, the retractor can keep the webbing 2 in a moderately tight state, which does not hinder the passenger's activities, and can quickly lock the webbing 2 in an emergency to prevent the passenger from rushing forward; the sliding seat 3 allows the seat belt to slide along the seat within a certain range to meet the needs of passengers of different body shapes and sitting postures; the fixing mechanism ensures that the sliding seat 3 can be firmly locked in a specified position when needed to prevent accidental sliding during emergency braking or collision, further enhancing the stability of the seat belt; the design of the rotating member 4 allows the webbing 2 to rotate flexibly when passing through the threading groove 41, reducing the feeling of restraint of the webbing 2 on the body when the passenger turns around or adjusts his sitting posture. This design not only improves riding comfort, but also avoids the risk of damage to the webbing 2 due to excessive twisting; the design of relative sliding between the locking tongue 21 and the webbing 2 makes it easy for passengers to fasten the seat belt quickly and easily. At the same time, the locking tongue 21 and the lock buckle 11 on the seat body 1 are tightly plugged together, ensuring that the seat belt is firmly locked in an emergency and effectively preventing the passenger from being thrown out of the seat; this quick connection and locking mechanism is crucial to improving the passenger's chance of survival in an emergency.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An adjustable safety belt for a car seat, characterized in that: The invention comprises a seat body (1), a webbing (2), a retractor, a sliding seat (3), a rotating member (4) and a fixing mechanism; the retractor is arranged inside the seat body (1), one end of the webbing (2) is wound on the retractor, and the other end of the webbing (2) is fixedly connected to the seat body (1); the sliding seat (3) is slidingly matched with the seat body (1), and the fixing mechanism is used to fix the sliding seat (3); the rotating member (4) is connected to the The sliding seat (3) is rotatably connected, and the rotating member (4) is provided with a guide groove (41) for the webbing (2) to pass through. The webbing (2) passes through the guide groove (41), and the webbing (2) and the rotating member (4) are slidingly matched; a locking tongue (21) is sleeved on the webbing (2), and the locking tongue (21) and the webbing (2) slide relatively, and a lock buckle (11) is provided on the seat body (1), and the locking tongue (21) and the lock buckle (11) are plug-connected and matched.

2. The adjustable safety belt for a car seat according to claim 1, characterized in that: The fixing mechanism comprises a guide rail (5), a spring (6), a pressing seat (7) and a driving seat (8); the guide rail (5) is fixed on the seat body (1), and the sliding seat (3) is slidingly matched with the guide rail (5); a guide hole (31) is provided on the sliding seat (3), and the pressing seat (7) passes through the guide hole (31), and the pressing seat (7) is slidingly matched with the guide hole (31); the spring (6) is located between the pressing seat (7) and the sliding seat (3), and one end of the spring (6) is pressed against the pressing seat (7), the other end of the spring (6) is pressed against the sliding seat (3); the driving seat (8) is slidingly matched with the sliding seat (3), a driving groove (81) is provided on the driving seat (8), a driving inclined surface (82) is provided in the driving groove (81), a driving flange (71) is provided on the pressing seat (7), the driving flange (71) is passed through the driving groove (81), and the elastic force of the spring (6) on the pressing seat (7) causes the driving flange (71) to press against the driving inclined surface (82) of the driving groove (81).

3. The adjustable safety belt for a car seat according to claim 2, characterized in that: The sliding seat (3) is provided with a strip-shaped guide groove (33), the driving flange (71) passes through the guide groove (33), and the driving flange (71) is slidingly matched with the guide groove (33).

4. The adjustable safety belt for a car seat according to claim 2, characterized in that: The sliding seat (3) is provided with a first limiting groove (32), the abutting seat (7) is provided with a second limiting groove (72), one end of the spring (6) is located in the first limiting groove (32), and the other end of the spring (6) is located in the second limiting groove (72).

5. The adjustable safety belt for a car seat according to claim 4, characterized in that: The guide rail (5) is provided with a plurality of positioning holes (51), and the plurality of positioning holes (51) are arranged at intervals along the length direction of the guide rail (5); when the abutment seat (7) moves to the position of the positioning hole (51), the elastic force of the spring (6) drives the abutment seat (7) to move in a direction close to the guide rail (5), so that the end of the abutment seat (7) is located in the positioning hole (51).

6. The adjustable safety belt for a vehicle seat according to claim 5, characterized in that: A guide bevel (52) is arranged in the positioning hole (51), one end of the guide bevel (52) is fixedly connected to one side of the positioning hole (51), and an angle exists between the guide bevel (52) and the guide rail (5).

7. The adjustable safety belt for a vehicle seat according to claim 6, characterized in that: The angle is between 10° and 80°.

8. The adjustable safety belt for a vehicle seat according to claim 2, characterized in that: The driving seat (8) is provided with a push-pull groove (83).

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