Safety belt height adjusting mechanism

Abstract

The utility model provides a safety belt height adjusting mechanism, which relates to the technical field of vehicle safety belt systems, and comprises a stand column assembly, the stand column assembly comprises an outer plate and an inner plate which are laminated, the inner plate is provided with a guide groove extending longitudinally, the side wall of the guide groove is provided with a guide rail extending longitudinally, the outer plate is provided with a through groove, and the through groove is provided with a through hole; the through groove is longitudinally aligned with the guide groove; the sliding block assembly comprises a sliding connecting piece which is in sliding fit with the guide rail, a mounting supporting column is arranged on the sliding connecting piece, and the mounting supporting column penetrates through the guide groove and the through groove and is connected with the safety belt guide ring; the guide rails are directly integrated on the inner plate through the stamping technology and matched with the guide grooves, the inner plate and the outer plate are stacked and welded to form a unified stress whole, the function of the guide rails and the B column of the vehicle body are integrated, the number of parts is reduced, the assembly technology is simplified, and meanwhile the overall structural strength is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of vehicle seat belt systems, and in particular to a seat belt height adjustment mechanism. Background Technology

[0002] In automotive safety systems, the seatbelt height adjuster, as a core component enabling adjustable seatbelt height, traditionally employs an independent guide rail assembly structure. This structure mainly includes:

[0003] Independent metal guide rail assembly: It consists of a metal guide rail body and a sliding block mounted on it. The sliding block achieves the function of adjusting the height of the seat belt by sliding with the seat belt guide.

[0004] Vehicle body fixed connection structure: including fixed hooks or bolt holes for connecting to the B-pillar of the vehicle body, and mechanical connection with the vehicle body is achieved by fasteners;

[0005] Split mounting bracket: It is an independent component. The metal guide rail is fixed to the vehicle body through the split mounting bracket as a transition structure.

[0006] The existing solution relies on the combination and assembly of the aforementioned split components. Its core design idea is to separate the guide rail functional components from the vehicle body structure and achieve mechanical connection through independent brackets.

[0007] However, this traditional technical solution suffers from redundant parts and high assembly complexity: the independent guide rail assembly, the split bracket, and the matching fasteners constitute a multi-component system, resulting in a large number of parts in a single high-adjustment unit. During the secondary assembly of these multiple components, the manufacturing tolerances and assembly positioning errors of each component are prone to cumulative effects, causing problems such as sliding block jamming and uneven adjustment resistance, which affect product reliability and user experience.

[0008] With increasingly stringent automotive safety standards and lightweight design requirements, the structural defects of traditional split-type seatbelt height adjusters have become increasingly apparent. How to reduce the number of parts in the seatbelt height adjuster, simplify the assembly process, and simultaneously improve the overall structural strength has become a pressing technical problem to be solved in this field. Utility Model Content

[0009] The purpose of this invention is to provide a seat belt height adjustment mechanism to solve the problems existing in the prior art, reduce the number of parts, simplify the assembly process, and improve the overall structural strength.

[0010] To achieve the above objectives, this utility model provides the following solution: a seat belt height adjustment mechanism, comprising:

[0011] The column assembly includes an outer plate and an inner plate stacked together. The inner plate has a longitudinally extending guide groove, and a longitudinally extending guide rail is provided on the side wall of the guide groove. The outer plate has a through groove, which is longitudinally aligned with the guide groove.

[0012] A sliding block assembly includes a sliding connector that slides with the guide rail, and a mounting post is provided on the sliding connector. The mounting post passes through the guide groove and the through groove and is connected to the seat belt guide ring.

[0013] In one embodiment, the inner plate includes a central guide extending longitudinally, with an upper positioning stop and a lower positioning stop respectively connected to the top and bottom ends of the central guide, and the guide groove is formed on the central guide along the longitudinal center line of the central guide.

[0014] As one embodiment, an upper arc-shaped transition section is provided between the upper positioning stop and the middle guide, and a lower arc-shaped transition section is provided between the lower positioning stop and the middle guide. The middle guide protrudes from the upper positioning stop and the lower positioning stop.

[0015] As one embodiment, the sidewall of the guide groove is provided with a plurality of slots spaced longitudinally, and the opening of each slot faces the center line of the sliding direction of the sliding block assembly; the sliding block assembly is provided with a locking claw for engaging with the slot, and the locking claw restricts the longitudinal movement of the sliding block assembly when it engages with the slot.

[0016] In one embodiment, the sliding block assembly includes a locking support, and the locking pawl is rotatably connected to the locking support via a rotating shaft; the locking support is fixedly connected to the sliding connector.

[0017] As one embodiment, an unlocking button for driving the locking pawl to rotate is slidably connected to the locking support. A guide protrusion is fixedly connected to the unlocking button. A guide hole that cooperates with the guide protrusion is opened on the locking pawl. The guide protrusion extends into the guide hole. The guide protrusion and the locking pawl form a sliding pair. The rotation trajectory of the locking pawl includes a locking position that is engaged in the slot and an unlocking position that is disengaged from the slot.

[0018] As one embodiment, the operating end of the unlock button extends through the guide groove and the through groove to the outside of the column assembly.

[0019] In one embodiment, a first bolt hole is provided in the middle of the mounting support, and a second bolt hole coaxial with the first bolt hole is provided on the safety belt guide ring. The first bolt hole and the second bolt hole are connected by fastening bolts.

[0020] As one embodiment, the outer side wall of the mounting column is provided with a column guide groove, the groove opening of the column guide groove faces the inner end guide surface of the guide rail, the inner end guide surface of the guide rail is embedded in the column guide groove and forms a sliding fit, and the inner end guide surface of the sliding connector is in contact with the outer end guide surface of the guide rail.

[0021] As one embodiment, the top of the locking bracket is provided with a grip that connects to the interior buttons on the vehicle body.

[0022] The present invention achieves the following technical advantages over the prior art:

[0023] The guide rail function is integrated with the vehicle body structure:

[0024] This invention integrates the guide rail directly onto the inner plate using a stamping process, and it mates with the guide groove. The inner and outer plates are layered and welded to form a unified load-bearing structure, directly serving as the automotive pillar assembly structure (such as the B-pillar). This transforms the traditional split guide rail into a feature of the vehicle body, achieving integrated seat belt height adjustment functionality. Furthermore, a sliding connector slides longitudinally with the guide rail, allowing the seat belt guide ring to be adjusted steplessly or in steps along the height of the pillar assembly to accommodate users of different heights. The mounting pillar penetrates the pillar assembly and connects to the seat belt guide ring, forming a rigid connection to ensure stable adjustment without loosening or jamming.

[0025] Reduce weight and assembly steps:

[0026] Utilizing automotive pillar direct forming technology, combined with precision stamping and surface strengthening processes, an integrated slide rail structure with high-precision guiding function is created. The outer plate through groove and the inner plate guide groove are longitudinally aligned to form a through sliding channel, ensuring smooth movement of the sliding block assembly and reducing assembly errors; it also reduces the number of parts and significantly reduces assembly steps.

[0027] Eliminate the split assembly interface:

[0028] Based on the integrated structure of the inner and outer panels, the inner panel, guide groove, and guide rail are integrally formed, avoiding the independent installation of traditional separate guide rails. The one-piece stamping of the inner panel simplifies the production process and is suitable for large-scale mass production; the inner and outer panels are laser welded, improving connection efficiency and quality, in line with the trend of automated manufacturing, while avoiding the assembly gaps and loosening risks of traditional separate guide rails.

[0029] Other technical solutions of this utility model also achieve the following technical effects:

[0030] This invention fully utilizes the strength of the vehicle body materials, directly selecting high-strength steel plates for the inner panel. This allows the guide rail's load-bearing capacity to be improved in tandem with the vehicle body's structural strength, effectively withstanding the high loads during emergency seatbelt stretching. The upper and lower arc-shaped transition sections cause the central guide component to bulge outward, providing ample sliding space for the sliding block assembly while reducing stress concentration through the arc transition, extending the mechanism's service life, and lowering the risk of metal fatigue. The concave structure of the outer panel precisely matches the convex structure of the inner panel, ensuring the longitudinal alignment accuracy of the guide groove and the through groove, preventing sliding jamming; the laser welding process ensures connection strength and dimensional stability. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is an exploded view of the overall structure of this utility model;

[0033] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0034] Figure 3 This is a schematic diagram of the overall structure of the present invention, omitting the seat belt.

[0035] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0036] Figure 5 This is a schematic diagram of the overall structure of this utility model;

[0037] Figure 6 for Figure 5 A magnified view of a section at point C;

[0038] Figure 7 This is a schematic diagram of the assembly of the sliding block assembly and the inner plate of this utility model;

[0039] Figure 8 for Figure 7 A magnified view of a section at point D;

[0040] Figure 9 This is a schematic diagram of the back of the sliding block assembly and inner plate assembly structure of this utility model;

[0041] Figure 10 This is another perspective view of the overall structure of the sliding block assembly and inner plate assembly of this utility model;

[0042] Figure 11 for Figure 10 A magnified view of a portion of point E in the middle;

[0043] Figure 12 This is a schematic diagram of the internal structure of the sliding block assembly of this utility model in the locked state;

[0044] Figure 13 This is a schematic diagram of the overall structure of the sliding block assembly of this utility model;

[0045] Figure 14 This is a schematic diagram of the overall structure of the sliding block assembly of this utility model, omitting the handle portion;

[0046] Figure 15 This is a schematic diagram of the overall structure of the seat belt guide ring of this utility model;

[0047] Figure 16 This is a schematic diagram of the inner plate structure of this utility model;

[0048] Figure 17 This is a schematic diagram of the overall structure of the back of the inner panel of this utility model.

[0049] The components are as follows: 1. Outer plate; 2. Inner plate; 3. Guide groove; 4. Guide rail; 5. Through groove; 6. Sliding connector; 7. Mounting support; 8. Seat belt guide ring; 9. Seat belt; 10. Middle guide component; 11. Upper positioning stop; 12. Lower positioning stop; 13. Upper arc transition section; 14. Lower arc transition section; 15. Slot; 16. Locking claw; 17. Locking support; 18. Unlocking button; 19. Guide protrusion; 20. Guide hole; 21. First bolt hole; 22. Second bolt hole; 23. Fastening bolt; 24. Seat belt guide hole; 25. Support guide groove; 26. Inner end guide surface; 27. Outer end guide surface; 28. Grip part; 29. ​​Mounting notch; 30. Lower stop; 31. Locking claw stop. Detailed Implementation

[0050] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0051] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0052] This utility model provides a seat belt height adjustment mechanism. Please refer to [reference needed]. Figure 1-17As shown, it includes a pillar assembly and a sliding block assembly. The pillar assembly includes an outer panel 1 and an inner panel 2. This pillar assembly is preferably a B-pillar assembly of an automobile, and the inner panel 2 is preferably a high-strength inner panel. (Refer to...) Figure 16 and Figure 17 As shown, a longitudinally extending guide groove 3 is formed on the inner plate 2, and a guide rail 4 is provided on the side wall of the guide groove 3. The guide rail 4 can be directly formed by a stamping process, and the guide rail 4 also extends longitudinally. A through groove 5 is formed on the outer plate 1, and the through groove 5 is longitudinally aligned with the guide groove 3. (Reference) Figure 14 The sliding block assembly includes a sliding connector 6, on which a mounting post 7 is provided. The mounting post 7 can pass through the guide groove 3 and the through groove 5. The mounting post 7 can extend to the outside of the column assembly. The mounting post 7 is connected to a seat belt guide ring 8, and the seat belt guide ring 8 is connected to a seat belt 9.

[0053] The work process is as follows:

[0054] Initial state: The sliding connector 6 of the sliding block assembly slides in conjunction with the guide rail 4 on the guide groove 3. The mounting column 7 passes through the guide groove 3 and the through groove 5 of the outer panel 1, and can extend into the passenger compartment. The seat belt guide ring 8 is fixed to the outside of the column assembly through the mounting column 7. The seat belt 9 is connected to the seat belt guide ring 8.

[0055] Height adjustment: When the seat belt height needs to be adjusted, an external force is applied to the sliding block assembly or directly to the seat belt guide ring 8, driving the sliding connector 6 to slide longitudinally (up or down) along the guide rail 4.

[0056] Synchronous movement: The sliding of the sliding connector 6 drives the mounting post 7 to move synchronously within the guide groove 3 and the through groove 5. Since the through groove 5 and the guide groove 3 are longitudinally aligned, the mounting post 7 can smoothly pass through the channel formed by the two. Until the sliding block assembly moves to the target height, the locking mechanism can fix the sliding connector 6 to the guide rail 4, keeping the seat belt guide ring 8 in the required position, thus completing the height adjustment.

[0057] This utility model integrates the guide rail function with the vehicle body structure:

[0058] This invention integrates the guide rail 4 directly onto the inner plate 2 using a stamping process, and it cooperates with the guide groove 3. The inner plate 2 and the outer plate 1 are laminated and welded to form a unified load-bearing whole, directly serving as part of the automotive pillar assembly structure (such as the B-pillar). This transforms the traditional split guide rail into a feature of the vehicle body, realizing the integration of the seat belt height adjuster function. Furthermore, the sliding connector 6 slides longitudinally with the guide rail 4, allowing the seat belt guide ring 8 to be adjusted steplessly or in steps along the height direction of the pillar assembly to accommodate users of different heights. The mounting pillar 7 penetrates the pillar assembly and connects to the seat belt guide ring 8, forming a rigid connection to ensure stable adjustment without loosening or jamming.

[0059] Reduce weight and assembly steps:

[0060] By employing automotive pillar direct forming technology, combined with precision stamping and surface strengthening processes, an integrated slide rail structure with high-precision guiding function is created. The through groove 5 of the outer plate 1 and the guide groove 3 of the inner plate 2 are longitudinally aligned, forming a continuous sliding channel to ensure smooth movement of the sliding block assembly and reduce assembly errors. This reduces the number of parts, eliminates the secondary assembly of split guide rails in existing technologies, and reduces assembly time by 45%. This solution also reduces system weight by 40%, increases structural strength by 32%, and significantly reduces assembly steps.

[0061] Eliminate the split assembly interface:

[0062] Based on the integrated structure of inner plate 2 and outer plate 1, inner plate 2, guide groove 3 and guide rail 4 are integrally formed, avoiding the independent installation of traditional split guide rails. The stamping and integral forming of inner plate 2 simplifies the production process and is suitable for large-scale mass production; inner plate 2 and outer plate 1 are laser welded to improve connection efficiency and quality, which is in line with the trend of automated manufacturing, while avoiding the assembly gap and loosening risks of traditional split guide rails.

[0063] Good reliability and versatility:

[0064] The mating structure of the guide rail 4 and the sliding connector 6 can withstand the tension of the seat belt and enhance the mechanical performance of the overall mechanism; it is suitable for the pillar structure of various vehicles, such as the B-pillar and C-pillar of the vehicle. By adjusting the size of the guide groove 3 and the through groove 5, the longitudinal length of the two can be adjusted to flexibly adapt to the seat belt adjustment requirements of different vehicle models.

[0065] In one embodiment, the inner plate 2 includes a central guide 10, an upper positioning stop 11, and a lower positioning stop 12. The central guide 10 is vertically arranged and extends longitudinally. The upper positioning stop 11 is connected to the top of the central guide 10, and the lower positioning stop 12 is connected to the bottom of the central guide 10. Preferably, the inner plate 2 is a high-strength steel plate, and the upper positioning stop 11, the central guide 10, and the lower positioning stop 12 are preferably integrally formed by a stamping process. The guide groove 3 is opened along the longitudinal centerline of the central guide member 10. Guide rails 4 are provided on both side walls of the guide groove 3, located on the side of the guide groove 3 opposite to the outer plate 1. An upper positioning stop 11 is located at the top of the guide groove 3, and a lower positioning stop 12 is located at the bottom of the guide groove 3. The upper and lower positioning stops 11 and 12 limit the maximum adjustment stroke of the sliding block assembly. A lower stop 30 is provided on the lower positioning stop 11 to limit the lowest sliding position of the sliding block assembly. The surface of the central guide member 10 is hard anodized with HV≥400. The sliding block assembly is injection molded from PA66+30%GF material.

[0066] In this embodiment, the inner plate 2 further includes an upper arc-shaped transition section 13 and a lower arc-shaped transition section 14. The upper arc-shaped transition section 13 is disposed between the upper positioning stop 11 and the middle guide 10, and the lower arc-shaped transition section 14 is disposed between the lower positioning stop 12 and the middle guide 10. The upper arc-shaped transition section 13 and the lower arc-shaped transition section 14 can play the role of arc transition, reduce stress concentration, and enhance the overall structural strength of the inner plate 2. Through the transition effect of the two arc-shaped transition sections, the middle guide 10 can protrude beyond the upper positioning stop 11 and the lower positioning stop 12 in the direction towards the outer plate 1, so that the inner plate 2 as a whole has an outward convex structure towards the outer plate 1. The outer plate 1 includes a concave fitting structure that matches the shape of the inner plate 2, so that the middle guide 10, the upper positioning stop 11, and the lower positioning stop 12 of the inner plate 2 are completely fitted with the outer plate 1. The inner plate 2 and the outer plate 1 are fixedly connected by laser welding. The high-strength inner plate in the B-pillar sheet metal structure is directly formed into a guide rail structure through a stamping process. In this invention, the inner plate 2 is integrally formed by stamping the central guide component 10, the upper positioning stop 11, the lower positioning stop 12, and the guide groove 3. The sidewall of the guide groove 3 forms a guide rail 4, providing a longitudinal sliding track for the sliding block assembly. The concave fitting structure of the outer plate 1 is tightly fitted with the convex structure of the inner plate 2, forming a rigidly connected column assembly through laser welding, ensuring structural stability during sliding. The central guide component 10 is connected to the upper and lower positioning stops through upper and lower arc-shaped transition sections, evenly transmitting the seat belt tension to the entire column assembly. The arc design reduces stress concentration and improves the structure's fatigue resistance. The high-strength inner plate 2 is directly used as the guide rail material, utilizing the inherent strength of the vehicle body material, avoiding the need for additional reinforcement in traditional split guide rails.

[0067] This invention fully utilizes the strength of the vehicle body materials. The inner panel 2 is made of high-strength steel plate, which improves the load-bearing capacity of the guide rail in tandem with the strength of the vehicle body structure, effectively withstanding the high load during emergency stretching of the seat belt. The upper and lower arc-shaped transition sections cause the central guide member 10 to bulge outward, providing ample sliding space for the sliding block assembly and reducing stress concentration through the arc transition, extending the service life of the mechanism and reducing the risk of metal fatigue. The concave structure of the outer panel 1 and the convex structure of the inner panel 2 are precisely matched to ensure the longitudinal alignment accuracy of the guide groove 3 and the through groove 5, preventing sliding jamming; the laser welding process ensures the connection strength and dimensional stability.

[0068] In one embodiment, the inner plate 2 is made of hot-formed steel 22MnB5 (tensile strength ≥980MPa), and the guide rail 4 is formed in one piece using an 800t servo press. The inner plate 2 and the outer plate 1 can be laser-welded with a power of 4kW and a speed of 5m / min. The welding method between the inner plate 2 and the outer plate 1 is laser deep penetration welding, and the weld spacing is ≤25mm. The surfaces of the inner plate 2 and the outer plate 1 are treated to form a micro-arc oxide film with a thickness of 15-20μm.

[0069] When manufacturing inner panel 2 or outer panel 1

[0070] a) Pre-punch holes in the sheet metal (S1);

[0071] b) Thermoforming treatment (S2, heating temperature 920±20℃);

[0072] c) Fine blanking of guide rails (S3, with a blanking interval controlled at 0.05-0.08mm);

[0073] d) Surface strengthening treatment (S4, plasma electrolytic oxidation).

[0074] In one embodiment, the inner plate 2 has a plurality of slots 15 on the sidewall of the guide groove 3, and the plurality of slots 15 are arranged longitudinally at intervals along the sidewall of the guide groove 3. Preferably, slots 15 are provided on both opposite sidewalls of the guide groove 3 in the transverse direction (perpendicular to its longitudinal extension direction), and the slots 15 on the sidewalls are symmetrically distributed, with slots 15 at the same height symmetrically aligned along the sliding center line. The opening of each slot 15 faces the sliding center line of the sliding block assembly, and the sliding block assembly includes a locking claw 16, which, when engaged in the slot 15, can restrict the longitudinal movement of the sliding block assembly.

[0075] In this embodiment, the sliding block assembly includes a locking support 17, a locking pawl 16 rotatably connected to the locking support 17 via a rotating shaft, and the locking support 17 fixedly connected to the sliding connector 6. Preferably, the locking support 17 and the sliding connector 6 are integrally formed, and the rotating shaft perpendicularly passes through the locking support 17 and the locking pawl 16. Preferably, the number of locking pawls 16 is set to two, and they are symmetrical about the longitudinal centerline of the locking support 17.

[0076] In this embodiment, an unlocking button 18 is slidably connected to the locking support 17. The unlocking button 18 slides linearly along the longitudinal direction, driving the locking pawl 16 to rotate. A guide protrusion 19 is fixedly connected to the unlocking button 18. The guide protrusion 19 is preferably cylindrical. A guide hole 20 is provided on the locking pawl 16 to cooperate with the guide protrusion 19. The guide protrusion 19 can extend into the guide hole 20, forming a sliding pair with the locking pawl 16. When the unlocking button 18 is driven to slide longitudinally, the locking pawl 16 can be rotated synchronously through the guide protrusion 19. The rotation trajectory of the locking pawl 16 includes a locked position and an unlocked position. The locking pawl 16 in the locked position is engaged in the slot 15, and the locking pawl 16 in the unlocked position can disengage from the slot 15 and retract into the guide groove 3, allowing the sliding block assembly to slide freely along the guide rail 4. Preferably, a longitudinal slide rail is provided on the locking support 17, and the unlocking button 18 is slidably connected to the outer wall of the longitudinal slide rail via a groove on its back, so that the unlocking button 18 can move longitudinally stably, thereby driving the locking pawl 16 to switch between the locked and unlocked positions. Simultaneously, a spring guide groove is provided along the longitudinal center line of the longitudinal slide rail, and a return spring (not shown in the figure) is also provided on the locking support 17. The spring guide groove limits the position of the return spring, keeping it longitudinally positioned. One end of the return spring is fixedly connected to the bottom of the unlocking button 18, and the other end is fixed to the top of the mounting post 7. Through the support of the return spring, the locking pawl 16 is always in the locked position when no external force is applied. When an external force drives the unlocking button 18 to slide along the longitudinal slide rail, the return spring is compressed and stores elastic potential energy, simultaneously putting the locking pawl 16 in the unlocked position. Figure 14 As shown, a locking pawl stop 31 is provided on the locking support 17. When the locking pawl 16 is engaged in the slot 15, the locking pawl 16 can be limited by the locking pawl stop 31. At this time, the guide protrusion 19 is located at the top of the guide hole 20.

[0077] At work:

[0078] Initial locked state:

[0079] When the reset spring is in its natural state, push the unlock button 18 to the preset position. At this time, the locking claw 16 is kept rotating to the locked position under the limiting action of the guide protrusion 19. Its end is inserted into the slot 15 on the side wall of the guide groove 3 of the inner plate 2. The symmetrical engagement of the double slots restricts the longitudinal movement of the sliding block assembly along the guide rail 4, thereby fixing the position of the seat belt guide ring 8.

[0080] Unlocking and adjustment process:

[0081] When an external force is applied to drive the unlock button 18 to slide along the longitudinal slide rail of the locking support 17, the slide groove on the back of the unlock button 18 forms a sliding pair with the outer wall of the slide rail, ensuring the linear accuracy of the longitudinal movement.

[0082] The guide protrusion 19 of the cylinder on the unlock button 18 moves synchronously, and the guide protrusion 19 forms a sliding fit in the guide hole 20 of the locking pawl 16. The relative displacement of the two pushes the locking pawl 16 to rotate around the pivot (vertically penetrating the locking support and the locking pawl), so that the locking pawl 16 disengages from the slot 15 and retracts into the guide groove 3, so that the locking pawl 16 is in the unlock position.

[0083] At this time, the sliding block assembly loses the constraint of the slot 15 and can slide freely along the guide rail 4, driving the mounting column 7 and the safety belt guide ring 8 to move longitudinally, thereby realizing the adjustment of the safety belt height.

[0084] Reset Locking Process

[0085] After the external force is released, the reset spring (one end fixed to the bottom of the unlock button and the other end fixed to the top of the mounting post 7) ​​releases its elastic potential energy, driving the unlock button 18 to reset along the longitudinal slide rail;

[0086] During the reset process, the guide protrusion 19 moves synchronously with the unlock button 18. The locking claw 16 is rotated to the locking position by the inner wall of the guide hole 20. Its end is re-engaged into the corresponding height slot 15, completing the locking of the sliding block assembly and stabilizing the seat belt guide ring 8 in the target position.

[0087] In this utility model, the locking support 17 and the sliding connector 6 are integrally molded, reducing the assembly interface and improving the overall structural rigidity; the unlocking mechanism (unlocking button, guide protrusion, reset spring) is integrated inside the sliding block assembly, making full use of the spatial layout of the guide groove 3 and the mounting column 7, achieving the function while maintaining a compact structure, and adapting to the design requirements of narrow installation spaces such as car B-pillars.

[0088] Furthermore, the sliding engagement between the cylindrical guide protrusion 19 and the guide hole 20 of the locking pawl 16 precisely converts the longitudinal linear motion of the unlock button 18 into the rotational motion of the locking pawl 16. The transmission process is free of backlash and jamming, ensuring reliable switching between the locked and unlocked positions. A return spring is longitudinally positioned within the spring guide groove of the locking support 17. Through fixed connections at both ends to the unlock button 18 and the mounting post 7 respectively, it provides continuous preload when no external force is applied, ensuring that the unlock button 18 always remains in the initial position where the locking pawl 16 engages with the slot 15, forming a "force-unlock - release-lock" failure protection mechanism. In one embodiment, a grip 28 is fixedly connected to the top of the locking support 17, and the grip 28 is connected to a button in the vehicle's interior trim.

[0089] In this embodiment, the unlock button 18 includes an operating end that can pass through the guide groove 3 and the through groove 5 and extend to the outside of the pillar assembly, preferably into the vehicle passenger compartment, so that the operator can easily control the movement of the unlock button 18 through the operating end.

[0090] In one embodiment, a first bolt hole 21 is provided in the middle of the mounting post 7, and a second bolt hole 22 is provided on the seat belt guide ring 8. The first bolt hole 21 and the second bolt hole 22 are coaxially arranged and fixedly connected by a fastening bolt 23. The fastening bolt 23 locks the first bolt hole 21 and the second bolt hole 22, thereby fixing the mounting post 7 to the seat belt guide ring 8. A seat belt guide hole 24 is provided in the seat belt guide ring 8, through which the seat belt 9 passes. In addition, a mounting notch 29 is provided at the top of the inner plate 2, which extends from the top of the inner plate 2 to the upper arc-shaped transition section 13; a lower stop 30 is provided at the lower arc-shaped transition section 14.

[0091] In one embodiment, a guide groove 25 is provided on the outer wall of the mounting column 7, with the groove opening facing the inner end guide surface 26 of the guide rail 4. The inner end guide surface 26 of the guide rail 4 is embedded in the guide groove 25 to form a sliding fit. Preferably, two guide rails 4 are provided, distributed opposite to each other on both sides of the center line of the guide groove 3, with the inner end guide surfaces 26 of the two guide rails facing each other; correspondingly, two guide grooves 25 are provided on the mounting column 7, which respectively cooperate with the inner end guide surfaces 26 of the two guide rails. The inner end face of the sliding connector 6 is in contact with the outer end guide surface 27 of the guide rail. The sliding connector 6 of this invention, in contact with the outer end guide surface 27 of the guide rail, and the cooperation between the guide groove 25 and the inner end guide surface 26 of the guide rail 4 form a double constraint, improving the stability and guiding nature of the sliding block assembly, making the sliding smoother and more stable. The design of the double guide rail 4 and the double pillar guide groove 25 makes the connection between the mounting pillar 7 and the guide rail 4 more stable, avoids deviation or shaking during sliding, and improves the accuracy of the height adjustment of the seat belt 9.

[0092] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0093] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A seatbelt height adjustment mechanism, characterized in that, include: The column assembly includes an outer plate (1) and an inner plate (2) stacked together. The inner plate (2) has a longitudinally extending guide groove (3). The side wall of the guide groove (3) is provided with a longitudinally extending guide rail (4). The outer plate (1) has a through groove (5). The through groove (5) is longitudinally aligned with the guide groove (3). The sliding block assembly includes a sliding connector (6) that slides with the guide rail (4), and a mounting post (7) is provided on the sliding connector (6). The mounting post (7) passes through the guide groove (3) and the through groove (5) and is connected to the seat belt guide ring (8).

2. The seat belt height adjustment mechanism according to claim 1, characterized in that, The inner plate (2) includes a central guide (10) extending longitudinally. The top and bottom ends of the central guide (10) are respectively connected to an upper positioning stop (11) and a lower positioning stop (12). The guide groove (3) is opened on the central guide (10) along the longitudinal center line of the central guide (10).

3. The seat belt height adjustment mechanism according to claim 2, characterized in that, An upper arc-shaped transition section (13) is provided between the upper positioning stop (11) and the middle guide (10), and a lower arc-shaped transition section (14) is provided between the lower positioning stop (12) and the middle guide (10). The middle guide (10) protrudes from the upper positioning stop (11) and the lower positioning stop (12).

4. The seat belt height adjustment mechanism according to claim 1, characterized in that, The guide groove (3) has a plurality of slots (15) spaced longitudinally on its sidewall, and the opening of each slot (15) faces the center line of the sliding direction of the sliding block assembly. The sliding block assembly is provided with a locking claw (16) for engaging with the slot (15). When the locking claw (16) engages with the slot (15), it restricts the longitudinal movement of the sliding block assembly.

5. The seat belt height adjustment mechanism according to claim 4, characterized in that, The sliding block assembly includes a locking support (17), and the locking pawl (16) is rotatably connected to the locking support (17) via a rotating shaft; the locking support (17) is fixedly connected to the sliding connector (6).

6. The seat belt height adjustment mechanism according to claim 5, characterized in that, The locking support (17) is slidably connected to an unlocking button (18) for driving the locking pawl (16) to rotate. The unlocking button (18) is fixedly connected to a guide protrusion (19). The locking pawl (16) is provided with a guide hole (20) that cooperates with the guide protrusion (19). The guide protrusion (19) extends into the guide hole (20). The guide protrusion (19) and the locking pawl (16) form a sliding pair. The rotation trajectory of the locking pawl (16) includes a locking position that is engaged in the slot (15) and an unlocking position that is disengaged from the slot (15).

7. The seat belt height adjustment mechanism according to claim 6, characterized in that, The operating end of the unlock button (18) extends through the guide groove (3) and the through groove (5) to the outside of the column assembly.

8. The seat belt height adjustment mechanism according to claim 1, characterized in that, The mounting support (7) has a first bolt hole (21) in the middle, and the safety belt guide ring (8) has a second bolt hole (22) coaxial with the first bolt hole (21). The first bolt hole (21) and the second bolt hole (22) are connected by a fastening bolt (23).

9. The seat belt height adjustment mechanism according to claim 1, characterized in that, The outer side wall of the mounting column (7) is provided with a column guide groove (25). The groove opening of the column guide groove (25) faces the inner end guide surface (26) of the guide rail (4). The inner end guide surface (26) of the guide rail (4) is embedded in the column guide groove (25) and forms a sliding fit. The inner end guide surface (26) of the sliding connector (6) is in contact with the outer end guide surface (27) of the guide rail (4).

10. The seat belt height adjustment mechanism according to claim 6, characterized in that, The top of the locking bracket (17) is provided with a grip (28) that connects to the interior buttons of the vehicle body.

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