Safety belt locking mechanism with guiding function

Abstract

The utility model relates to the technical field of safety belt locking mechanisms, in particular to a safety belt locking mechanism with a guiding function, which comprises a locking shell, a guide rod and a guide rod. The curling shaft is rotationally inserted into the locking shell; the safety belt is wound on the winding shaft; the continuous winding and unwinding mechanism is arranged in the locking shell and used for rapidly controlling winding and unwinding of the safety belt and pressing the safety belt; the intermittent winding and unwinding mechanism is arranged in the locking shell and used for finely adjusting winding of the safety belt and pressing the safety belt; wherein the continuous winding and unwinding mechanism comprises a ratchet wheel, the ratchet wheel is fixedly arranged on a winding shaft in a sleeving mode, and the ratchet wheel is rotationally arranged in a locking shell; the side supporting plate is arranged in the locking shell, and two arc-shaped grooves are formed in the side supporting plate; the first clamping plate is installed on the side supporting plate in a swinging mode and matched with the ratchet wheel to limit rotation of the curling shaft, and a fixed shifting piece is arranged on the first clamping plate; and the first torsional spring is clamped on the side supporting plate.

Description

Technical Field

[0001] This utility model relates to the technical field of seat belt locking mechanisms, and in particular to a seat belt locking mechanism with a guiding function. Background Technology

[0002] In automotive safety systems, seat belts are a critical component for protecting the lives of drivers and passengers, and the performance of their locking mechanisms is paramount. Traditional seat belt locking mechanisms typically only possess basic locking and releasing functions, exhibiting numerous shortcomings in seat belt retraction control. On one hand, when rapid seat belt retraction is required, existing mechanisms struggle to achieve efficient and stable operation, resulting in slow retraction speeds and issues such as seat belt tangling and loosening, failing to meet the effective restraint requirements for drivers and passengers in emergency situations. On the other hand, when fine-tuning seat belt retraction, traditional mechanisms have low adjustment precision, unable to accurately control the seat belt tension, leading to poor fit between the seat belt and the driver's / passenger's body, affecting ride comfort and safety protection.

[0003] Although some improved seat belt locking mechanisms have emerged in the existing technology, attempting to improve retraction performance by adding auxiliary components or optimizing the structure, these improvements often only enhance a single function and lack a comprehensive design scheme that combines rapid retraction with precise fine-tuning, making it difficult to simultaneously meet the dual requirements of efficient retraction and fine adjustment. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a seat belt locking mechanism with a guiding function that can achieve efficient, stable and rapid winding, and ensure the stability and reliability of the seat belt winding process.

[0005] This utility model provides a seat belt locking mechanism with a guiding function, comprising:

[0006] The locking housing has an internal cavity.

[0007] The retractor is rotatably inserted into the locking housing.

[0008] The seat belt is wound and mounted on a retractor.

[0009] A continuous winding mechanism, housed within the locking housing, is used to quickly control the winding of the seatbelt and to press the seatbelt into place.

[0010] An intermittent winding mechanism, located in the locking housing, is used to fine-tune the winding of the seat belt and to tighten the seat belt.

[0011] The continuous winding and unwinding mechanism includes:

[0012] The ratchet is fixedly mounted on the retractor shaft, and the ratchet rotation is located inside the locking housing.

[0013] The side support plate is located in the locking housing and has two arc-shaped grooves.

[0014] The first plate is oscillatingly mounted on the side support plate and works with the ratchet to restrict the rotation of the coiling shaft. A fixing lever is provided on the first plate.

[0015] The first torsion spring is mounted on the side support plate and is in contact with the first clamping plate to provide elastic force to the first clamping plate, so that the first clamping plate remains in the clamping state with the ratchet.

[0016] A cam is rotatably mounted on a retracting shaft. The cam has a protrusion that engages with the first card plate fixing plate and has a slot.

[0017] As a preferred embodiment of this utility model, the intermittent winding and unwinding mechanism includes:

[0018] Two swing reference plates are symmetrically swinging and set in the locking housing. The swing reference plates are provided with two sliding grooves and are coaxial with the coiling shaft.

[0019] The second clamping plate is slidably clamped in the groove of the swing reference plate to clamp the ratchet and restrict its rotation;

[0020] A connecting shaft is inserted into two swing reference plates;

[0021] Two second torsion springs are symmetrically sleeved on the connecting shaft. One end of the second torsion spring is connected to the swing reference plate, and the other end is connected to the second clamping plate.

[0022] As a preferred embodiment of this utility model, each swing reference plate is slidably inserted with a pivot pin, and the pivot pin is rotatably disposed in the slide groove of the swing reference plate. Each pivot pin is provided with a control piece, which is disposed on the inner side of the corresponding swing reference plate. A pull rod is provided between two control pieces, and the control piece is fixedly connected to the second card plate.

[0023] As a preferred embodiment of this utility model, a pull rod is provided between the two swing reference plates, and the pull rod is located outside the locking housing.

[0024] As a preferred embodiment of this utility model, a protective sleeve is provided around the outer end of each swing reference plate.

[0025] As a preferred embodiment of this utility model, the ratchet, the first clamping plate, and the second clamping plate are all made of high-strength carbon steel.

[0026] As a preferred embodiment of this utility model, a guide roller shaft is rotatably inserted into the locking housing to guide the safety belt pull-out path.

[0027] As a preferred embodiment of this utility model, the locking housing has a protective strip on the buckle; the surface of the protective strip is made of smooth mirror.

[0028] Compared with the prior art, the beneficial effects of this utility model are as follows: by turning the handle to drive the turntable, pin and cam to rotate, the first clamping plate quickly disengages from the ratchet, and the winding shaft rotates rapidly under the action of the spiral torsion spring, realizing the rapid winding of the seat belt; the continuous winding mechanism effectively avoids problems such as tangling and loosening of the seat belt during the winding process, ensuring the stability and reliability of the seat belt winding process, and ensuring that the seat belt can always be in good working condition; precise tension control can ensure that the seat belt can better disperse the force when a collision occurs, reduce the injury to the driver and passengers, and effectively improve the safety protection effect of the seat belt. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of this utility model;

[0030] Figure 2 This is a schematic diagram of the cam and the first clamping plate working together;

[0031] Figure 3 This is a schematic diagram of the side support plate installation structure;

[0032] Figure 4 This is an enlarged schematic diagram of the side support plate structure;

[0033] Figure 5 This is an enlarged schematic diagram of the intermittent winding and unwinding mechanism;

[0034] Figure 6 This is a cross-sectional structural schematic diagram of the present invention;

[0035] The attached diagram shows the following markings: 1. Locking housing; 11. Winding shaft; 12. Safety belt; 13. Guide roller shaft; 14. Protective strip; 2. Continuous winding and unwinding mechanism; 21. Ratchet; 22. Side support plate; 23. First clamping plate; 24. First torsion spring; 25. Cam; 26. Protrusion; 27. Pin; 28. Turntable; 29. ​​Rotary handle; 3. Intermittent winding and unwinding mechanism; 31. Swinging reference plate; 32. Second clamping plate; 33. Connecting shaft; 34. Second torsion spring; 35. Control plate; 36. Rotary shaft pin; 37. Pull rod; 38. Protective sleeve. Detailed Implementation

[0036] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0037] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] Reference Figures 1-6 This embodiment provides a seat belt locking mechanism with a guiding function, including:

[0039] Locking housing 1, with a cavity inside;

[0040] The retractable shaft 11 is rotatably inserted into the locking housing 1; the retractable shaft 11 is controlled to rotate in one direction by a helical torsion spring provided in the locking housing 1, and rotation in the other direction requires overcoming the elastic force of the helical torsion spring.

[0041] The safety belt 12 is wound and mounted on the retractor 11;

[0042] The continuous winding mechanism 2 is installed in the locking housing 1 and is used to quickly control the winding of the seat belt 12 and to press the seat belt 12.

[0043] An intermittent winding mechanism 3 is installed in the locking housing 1 and is used to fine-tune the winding of the seat belt 12 and to press the seat belt 12 tightly.

[0044] The continuous winding and unwinding mechanism 2 includes:

[0045] Ratchet 21 is fixedly mounted on retractor 11 and is rotatably disposed inside locking housing 1.

[0046] Side support plate 22 is provided in the locking housing 1, and two arc-shaped grooves are provided on the side support plate 22;

[0047] The first plate 23 is oscillatingly mounted on the side support plate 22 and cooperates with the ratchet 21 to restrict the rotation of the coiling shaft 11. A fixing paddle is provided on the first plate 23.

[0048] The first torsion spring 24 is mounted on the side support plate 22. The first torsion spring 24 is in contact with the first locking plate 23 and is used to provide elastic force to the first locking plate 23 so that the first locking plate 23 is kept in the locking state with the ratchet 21.

[0049] A cam 25 is rotatably mounted on a retracting shaft 11. A protrusion 26 is provided on the cam 25, which is in contact with a fixing tab of the first locking plate 23. A slot is provided on the protrusion 26. Rotating the cam 25 causes the protrusion 26 to rotate. Through the cooperation between the protrusion 26 and the fixing tab of the first locking plate 23, the first locking plate 23 is pushed to swing against the elastic force of the first torsion spring 24 and disengage from the ratchet 21. Two pins 27 are provided on the cam 25. The two pins 27 are slidably mounted in two arc-shaped grooves of the side support plate 22. A turntable 28 is rotatably mounted on the locking housing 1. The turntable 28 is fixedly connected to the two pins 27. A handle 29 is provided on the turntable 28. By turning the handle 29, the turntable 28 is rotated, which in turn rotates the two pins 27.

[0050] In this embodiment, during normal driving, the seat belt is in a relaxed or slightly extended state. At this time, due to the action of the first torsion spring 24, the first locking plate 23 remains engaged with the ratchet 21. The ratchet 21 is fixedly mounted on the retracting shaft 11, so the cooperation between the first locking plate 23 and the ratchet 21 restricts the rotation of the retracting shaft 11 in the direction that releases the seat belt 12. However, under the action of the helical torsion spring, the retracting shaft 11 tends to rotate in the direction that retracts the seat belt 12, but this is restricted by the cooperation between the first locking plate 23 and the ratchet 21, thus preventing the seat belt from being fully extended. 12 maintains a relatively stable state and will not loosen easily; when it is necessary to quickly retract the seat belt 12, the turntable 28 is rotated by turning the handle 29; the turntable 28 is fixedly connected to two pins 27, and the rotation of the turntable 28 will drive the two pins 27 to rotate; since the two pins 27 are respectively slidably set in the two arc-shaped grooves of the side support plate 22, the rotation of the pins 27 will drive the cam 25 to rotate; the cam 25 is provided with a protrusion 26, which is in contact with the fixing tab of the first locking plate 23; as the cam 25 rotates, the protrusion 26 will push the first locking plate 23 to rotate. Plate 23 overcomes the elastic force of the first torsion spring 24, causing the first locking plate 23 to disengage from the ratchet 21. At this time, the retracting shaft 11 is no longer restricted by the first locking plate 23 and the ratchet 21. Under the action of the helical torsion spring, the retracting shaft 11 rotates rapidly, quickly winding up the seat belt 12. Simultaneously, in this state, pulling the seat belt 12 outward can continuously and quickly pull it to a suitable length. By turning the handle 29, the turntable 28, pin 27, and cam 25 rotate, causing the first locking plate 23 to quickly disengage from the ratchet. With the cooperation of 21, the retracting shaft 11 rotates rapidly under the elastic force of the helical torsion spring, realizing the rapid winding of the seat belt 12; the continuous winding and unwinding mechanism 2 effectively avoids problems such as tangling and loosening of the seat belt 12 during the winding process, ensuring the stability and reliability of the seat belt 12 winding process, and ensuring that the seat belt 12 can always be in good working condition; precise tension control can ensure that the seat belt 12 can better disperse the force when a collision occurs, reduce the injury to the driver and passengers, and effectively improve the safety protection effect of the seat belt 12.

[0051] As a preferred embodiment of the above technical solution, such as Figure 5 As shown, the intermittent winding and unwinding mechanism 3 includes:

[0052] Two swing reference plates 31 are symmetrically swinging in the locking housing 1. Two sliding grooves are provided on the swing reference plates 31. The swing reference plates 31 are coaxial with the coiling shaft 11.

[0053] The second locking plate 32 is slidably locked in the groove of the swing reference plate 31 to lock the ratchet 21 and restrict the rotation of the ratchet 21.

[0054] Connecting shaft 33 is inserted into two swing reference plates 31;

[0055] Two second torsion springs 34 are symmetrically sleeved on the connecting shaft 33. One end of the second torsion spring 34 is connected to the swing reference plate 31, and the other end is connected to the second clamping plate 32.

[0056] When fine-tuning of the exposed length of the seat belt is required, turning the handle 29 rotates the cam 25, causing the cam 25 to rotate the protrusion 26. The rotating protrusion 26 engages with the fixing tab on the first locking plate 23, pushing the first locking plate 23 out of engagement with the ratchet 21, until the fixing tab on the first locking plate 23 slides into the slot of the protrusion 26, fixing the first locking plate 23. At this point, the ratchet 21 can rotate smoothly without external force control. Then, the two swing reference plates 31 are swung, causing the two swing reference plates 31 to... The second locking plate 32 is driven to swing downward until it is locked onto the ratchet 21, thus restricting the counterclockwise rotation of the ratchet 21 again. When it is necessary to stretch the seat belt outward, the second locking plate 32 is pulled outward to overcome the elastic force of the second torsion spring 34, so that the second locking plate 32 is disengaged from the ratchet 21, realizing the counterclockwise rotation of the ratchet 21 and smoothly stretching the seat belt outward. After stretching to the appropriate length, the second locking plate 32 is released in time, and under the elastic force of the second torsion spring 34, it automatically resets and locks onto the ratchet 21 to achieve the restriction function of the ratchet 21.

[0057] In this embodiment, the operator swings two swing reference plates 31. Since the swing reference plates 31 are symmetrically oscillating within the locking housing 1 and coaxial with the retraction shaft 11, the swinging of the swing reference plates 31 causes the second locking plate 32, which is slidably engaged in its groove, to swing downwards. When the second locking plate 32 swings until it engages with the ratchet 21, it again restricts the counterclockwise rotation of the ratchet 21. At this time, the retraction state of the seat belt 12 is controlled by the second locking plate 32, providing a basis for precisely adjusting the exposed length of the seat belt. When it is necessary to stretch the seat belt 12 outward to increase its exposed length, the operator pulls the second locking plate 32 outward. Since one end of the second torsion spring 34 is connected to the swing reference plate 31 and the other end is connected to the second locking plate 32, pulling the second locking plate 32 requires overcoming the elastic force of the second torsion spring 34. When the second locking plate 32 disengages from the ratchet 21, the ratchet 21 is no longer restricted by the second locking plate 32 and can rotate counterclockwise, thereby causing the retracting shaft 11 to rotate accordingly, and the seat belt 12 can be smoothly stretched outward. After the seat belt 12 is stretched to the appropriate length, the operator promptly releases the second locking plate 32. Under the elastic force of the second torsion spring 34, the second locking plate 32 automatically resets and re-locks onto the ratchet 21, again restricting the counterclockwise rotation of the ratchet 21, keeping the seat belt 12 at its current exposed length, thus completing the fine-tuning operation. The intermittent winding mechanism 3, through the cooperation of the second locking plate 32 and the ratchet 21, and the operator's manual control of the second locking plate 32, can precisely adjust the winding length of the seat belt 12 with a small range. Compared with the traditional seat belt locking mechanism, this greatly improves the adjustment accuracy, allowing the seat belt 12 to better adapt to different body shapes and sitting postures of drivers and passengers, ensuring a good fit between the seat belt 12 and the driver's / passenger's body, and improving riding comfort. The elastic force of the second torsion spring 34 allows the second locking plate 32 to automatically reset and firmly lock onto the ratchet 21, preventing the seat belt 12 from becoming loose during use and ensuring that the seat belt 12 can play a stable restraining role under various working conditions.

[0058] Specifically, such as Figure 5 As shown, each swing reference plate 31 is slidably inserted with a pivot pin 36, and the pivot pin 36 is rotatably disposed in the slide groove of the swing reference plate 31. Each pivot pin 36 is provided with a control piece 35, which is disposed on the inner side of the corresponding swing reference plate 31. A pull rod is provided between two control pieces 35, and the control piece 35 is fixedly connected to the second card plate 32.

[0059] In this embodiment, when the seat belt needs to be stretched outward, the lever between the control plates is pulled outward, which in turn pulls the second locking plate to overcome the elastic force of the second torsion spring, causing the second locking plate to disengage from the ratchet and realize the ratchet's counterclockwise rotation, thereby smoothly stretching the seat belt outward. During this process, the control plate moves with the second locking plate, and the pivot pin slides and rotates in the groove to adapt to its movement. After stretching to the appropriate length, the second locking plate is released, and under the elastic force of the second torsion spring, the second locking plate automatically resets and locks onto the ratchet, realizing the restriction function of the ratchet and completing the fine adjustment of the seat belt length. The sliding and rotating mechanism, along with the fixed connection between the control plate and the second clamping plate, allows for precise control of the position and swing amplitude of the second clamping plate. This enables fine-tuning of the seatbelt retraction, improving adjustment accuracy and resulting in a better fit between the seatbelt and the occupants, enhancing ride comfort and safety. The cooperation between the pivot pin and the slide groove, as well as the connection between the control plate and the swing reference plate and the second clamping plate, makes the entire intermittent winding mechanism more stable and reliable. During seatbelt winding and stretching, it can withstand certain external forces, ensuring normal operation of the mechanism and reducing the probability of malfunctions caused by structural instability.

[0060] More specifically, such as Figure 5 As shown, a pull rod 37 is provided between the two swing reference plates 31, and the pull rod 37 is located outside the locking housing 1;

[0061] In this embodiment, the pull rod 37 is located outside the locking housing 1. The operator does not need to reach into the complex internal structure of the locking housing 1 to operate. The intermittent winding mechanism 3 can be controlled directly from the outside by pulling the pull rod 37, which simplifies the fine-tuning of the exposed length of the seat belt and improves the efficiency and comfort of operation. Since the pull rod 37 connects the two swing reference plates 31, the operator only needs to apply one operation to the pull rod 37 to drive the two swing reference plates 31 to move synchronously. This ensures the consistency of the movement of the second locking plates 32 on both sides and avoids the problem of asynchronous operation that may be caused by operating the two swing reference plates 31 separately, further simplifying the operation process. The pull rod 37 connects the two swing reference plates 31 into a whole, which enhances the overall structural stability of the intermittent winding mechanism 3.

[0062] Furthermore, such as Figure 5 As shown, each swing reference plate 31 is covered with a protective sleeve 38 at its outer end;

[0063] In this embodiment, the space between the various components in the seat belt locking mechanism is relatively small, and the swing reference plate 31 may scrape or collide with other components during movement. The protective sleeve 38 can play a role in isolation and buffering, reducing direct contact between the swing reference plate 31 and other components, reducing the risk of component damage caused by scraping or collision, and ensuring the normal operation of each component inside the mechanism. When the operator performs fine adjustment of the exposed length of the seat belt, the protective sleeve 38 can prevent the operator's hands or other objects from directly contacting the sharp edges or burrs that may exist on the outer end of the swing reference plate 31, reducing the risk of the operator being scratched or injured, and improving the safety of operation.

[0064] Furthermore, the ratchet 21, the first clamping plate 23, and the second clamping plate 32 are all made of high-strength carbon steel.

[0065] In this embodiment, high-strength carbon steel has high strength and toughness, capable of withstanding the large tensile and torque forces generated by the seat belt 12 during rapid winding, stretching, and normal use. The use of this material for the ratchet 21, the first locking plate 23, and the second locking plate 32 effectively prevents breakage and deformation due to excessive force, greatly improving the reliability of the seat belt locking mechanism and ensuring normal operation under various working conditions, providing reliable protection for the lives of drivers and passengers. Because the high-strength carbon steel components have good wear resistance and fatigue resistance, during long-term use, the ratchet 21, the first locking plate 23, and the second locking plate 32... The wear between plates 32 is minimal, making it less prone to malfunctions such as loosening or jamming due to wear. This reduces the number of maintenance visits and costs of the seatbelt locking mechanism, improving the overall reliability and efficiency of the vehicle. Vehicles face various harsh environments during use, such as high temperatures, low temperatures, humidity, and corrosion. High-strength carbon steel has excellent corrosion resistance and temperature resistance, maintaining stable performance under these harsh conditions. The ratchet 21, the first locking plate 23, and the second locking plate 32 are made of this material, making them less susceptible to corrosion, rust, or performance degradation due to environmental factors, thus extending the service life of the seatbelt locking mechanism.

[0066] Furthermore, as shown in 6, a guide roller shaft 13 is rotatably inserted into the locking housing 1 to guide the pull-out path of the safety belt 12;

[0067] In this embodiment, the rotation of the guide roller 13 reduces friction and jamming between the seat belt 12 and other components inside the locking housing 1 during the pulling process, allowing the seat belt 12 to be pulled out and retracted more smoothly, thus improving the convenience and reliability of the seat belt. During the pulling process of the seat belt 12, the guide roller 13 can precisely control the path of the seat belt 12, avoiding problems such as entanglement and twisting of the seat belt 12 inside the locking housing 1, ensuring that the seat belt 12 is always in an orderly state, thereby effectively preventing the restraint effect on the driver and passengers from being affected by the entanglement or loosening of the seat belt 12, and improving the safety protection performance.

[0068] Furthermore, such as Figure 6 As shown, the locking housing 1 has a protective strip 14 attached to its buckle; the surface of the protective strip 14 is a smooth mirror finish.

[0069] In this embodiment, the seat belt 12 will rub against the buckle during frequent pulling and retracting. The smooth mirror surface of the protective strip 14 can greatly reduce the coefficient of friction between the seat belt 12 and the buckle, thereby reducing wear on the surface of the seat belt 12, extending the service life of the seat belt 12, and reducing safety hazards caused by wear on the seat belt 12. The smooth mirror surface of the protective strip 14 can reduce the resistance when pulling the seat belt 12, making it easier and more convenient for drivers and passengers to put on or unput on the seat belt 12, improving the comfort and operational efficiency of seat belt use. In an emergency, the smooth pulling performance helps drivers and passengers to quickly put on the seat belt, buying time for their own safety.

[0070] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A seatbelt locking mechanism with guiding function, characterized in that, It includes: Locking shell, the locking shell is internally provided with a cavity; Rolling shaft, the rolling shaft is rotatably inserted in the locking shell; Safety belt, the safety belt is wound on the rolling shaft; Continuous winding and unwinding mechanism, provided in the locking shell, for quickly controlling the winding of the safety belt and compacting the safety belt; Intermittent winding and unwinding mechanism, provided in the locking shell, for fine-tuning the winding of the safety belt and compacting the safety belt; The continuous winding and unwinding mechanism includes: Ratchet, fixedly sleeved on the rolling shaft, rotatably arranged in the locking shell; Side support plate, provided in the locking shell, provided with two arc-shaped grooves on the side support plate; First clamping plate, swing-mounted on the side support plate, cooperated with the ratchet to limit the rotation of the rolling shaft, provided with a fixed tab on the first clamping plate; First torsional spring, clamped on the side support plate, abutted with the first clamping plate, for providing elastic force to the first clamping plate to keep the first clamping plate in clamped state with the ratchet; Cam, rotatably sleeved on the rolling shaft, provided with a protrusion on the cam, the protrusion is abutted with the fixed tab of the first clamping plate, the protrusion is provided with a clamping groove.

2. The seat belt locking mechanism having a guiding function according to claim 1, wherein The intermittent winding and unwinding mechanism includes: Two swing reference plates, two swing reference plates are symmetrically swing-mounted in the locking shell, provided with two sliding grooves on the swing reference plates, the swing reference plates are coaxial with the rolling shaft; Second clamping plate, slidingly clamped in the sliding groove of the swing reference plate, for clamping the ratchet to limit the rotation of the ratchet; Connecting shaft, inserted on the two swing reference plates; Two second torsional springs, two second torsional springs are symmetrically sleeved on the connecting shaft, one end of the second torsional spring is connected with the swing reference plate, the other end is connected with the second clamping plate.

3. The seat belt locking mechanism having a guiding function according to claim 2, wherein A rotating shaft pin is slidingly inserted on each swing reference plate, and the rotating shaft pin is rotatably arranged in the sliding groove of the swing reference plate, a control tab is provided on each rotating shaft pin, the control tab is arranged on the inner side of the corresponding swing reference plate, a pull rod is provided between the two control tabs, the control tab is fixedly connected with the second clamping plate.

4. The seat belt locking mechanism having a guiding function according to claim 2, wherein A pulling rod is provided between the two swing reference plates, the pulling rod is arranged outside the locking shell.

5. The seat belt locking mechanism having a guiding function according to claim 2, wherein A protective sleeve is wrapped around the outer end of each swing reference plate.

6. The seat belt locking mechanism having a guiding function according to claim 2, wherein The ratchet, the first clamping plate and the second clamping plate are made of high-strength carbon steel.

7. The seat belt locking mechanism having a guiding function according to claim 1, wherein A guide roller is rotatably inserted in the locking shell for guiding the pulling path of the safety belt.

8. The seat belt locking mechanism having a guiding function according to claim 1, wherein A protective strip is provided on the belt buckle of the locking shell, and the surface of the protective strip is smooth and mirror-like.

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