Webbing height adjustment device

Abstract

To provide a webbing height adjustment device having a height position adjustment function which can provide an upper position for main webbing in a seat belt system.SOLUTION: A webbing height adjustment device is used in a seat belt system of a vehicle and includes: a vibration damping alleviation assembly having auxiliary webbing coupled to an elastic part and a D ring connected to the upper side on one side of a seat; and a webbing height adjuster. The auxiliary webbing or the elastic part is provided below the D ring, a slider coupled to an elastic member is provided at a body of the webbing height adjuster, and a cover is provided at the outer side of the body. Thus, main webbing in the seat belt system passes through the D ring and then penetrates through the body. The structure causes the auxiliary webbing to be provided penetrating through the body and the slider.SELECTED DRAWING: Figure 15

Description

[Technical Field]

[0001] The present invention relates to a seat belt system for a vehicle, and more particularly to a webbing height adjustment device having a height position adjustment function that can provide an adjustable upper position for the main webbing in a seat belt system. [Background technology]

[0002] Conventionally, three-point seat belt systems are used in seats of vehicles such as automobiles, trucks, and utility vehicles to provide safety protection for occupants such as the driver or passengers. The three-point seat belt system's configuration primarily involves a webbing retractor attached to one side of the vehicle body near the seat, with the webbing extending from the retractor extending upward to pass through a D-ring above a pillar on one side of the seat, and then the end of the webbing separating from the retractor and secured below the pillar. To use the seat belt, the webbing is passed diagonally downward from the upper front of the seat occupant's shoulders and chest, and the webbing's connecting tongue is inserted into the seat buckle on the other side of the seat. The webbing then passes through another portion of the connecting tongue and extends toward the side of the seat near the webbing retractor, laying horizontally in front of the occupant's abdomen, forming a three-point seat belt system. The webbing of this seat belt system restrains the occupant's body in the seat.

[0003] In conventional three-point seat belt systems for vehicles, the shoulder portion of the webbing, which presses against the shoulders and chest of the seat occupant from an oblique direction, must restrain the seat occupant with considerable tension, causing discomfort to the seat occupant. Furthermore, if the occupant's body is tightly fastened by the webbing, unless the height of the webbing near the seat occupant's shoulders can be adjusted, the seat occupant's neck may be injured by the webbing in an emergency. Therefore, a webbing height adjuster attached to the upper D-ring of the pillar on one side of the seat is required to enable the seat occupant to adjust the webbing height to suit their own body type. The provision of this adjuster ensures the safety of the seat belt system. Furthermore, in today's world where the safety of vehicle occupants, including the driver and passengers, is increasingly important, webbing height adjusters for seat belt systems have become an essential safety device.

[0004] An example of a conventional webbing height adjuster structure for a seat belt system is the webbing height adjuster device disclosed in U.S. Pat. No. 1,065,442. This structure includes a D-ring member attached to one upper side of a vehicle seat, a movable frame, a movable member movably attached to the movable frame, and an outer cover fitted over the outside of the movable frame. The webbing connected to a webbing retractor in the seat belt system passes through the movable frame or a connecting member connected thereto and the D-ring, in that order, and the webbing shoulder portion of the webbing passes between the movable frame and the movable member. The tension of the webbing causes relative movement between the movable frame and the movable member to tighten and lock the webbing, thereby providing an adjustable upper position for the seat occupant. When the webbing adjuster is not in use, the outer cover fitted over the outside of the movable frame can be hooked onto the D-ring to store the webbing.

[0005] The webbing adjuster of a conventional seat belt system is connected between the rear portion of the webbing (i.e., the portion of the webbing between the webbing retractor and the guide ring member) and the front portion of the webbing that is hung diagonally across the shoulders and chest of a seat occupant, and therefore can adjust the upper position of the webbing. However, it does not have an auxiliary vibration damping function, and because the webbing height adjuster clamps and locks the webbing in response to the webbing tension, it is prone to displacement when there is no occupant on the seat using the seat belt system, and therefore needs to be hooked onto the guide ring member on the pillar by an outer cover. Therefore, the occupant needs to readjust the height position of the webbing height adjuster every time they sit in the seat.

[0006] In addition, in order to improve safety in use, conventional vehicle seat belt systems have a structure in which the webbing of an existing webbing retractor is used as the main webbing, and a webbing height adjuster is used to provide a height adjustment function for the upper position of the main webbing.In addition, an auxiliary vibration damping member is attached to a pillar on one side of the seat and connected to the main webbing, or an auxiliary vibration damping member is further connected to the webbing height adjuster, and the elastic member of the auxiliary vibration damping member provides a restoring force for mitigating vibration damping to the occupant restrained on the seat.

[0007] Examples of conventional webbing height adjustment mechanisms that combine height adjustment and a restoring force for mitigating vibration damping as described above include the "WEB POSITION ADJUSTMENT AND ATTENUATION APPARATUS" disclosed in Patent Document 1 and Patent Document 2, the "Shock absorbing height adjusters for restraint systems and associated systems and methods" disclosed in Patent Document 3, the "Height adjusters with anti-cinch features for occupant restraint systems" disclosed in Patent Document 4, and the "Height adjusters with anti-cinch features for occupant restraint systems" disclosed in Patent Document 5.

[0008] Among these, in the "WEB POSITION ADJUSTMENT AND ATTENUATION APPARATUS" disclosed in Patent Documents 1 and 2, a seat belt system includes an auxiliary vibration damping assembly whose lower end is connected to the lower part of one side of a seat and an upper fixing member provided above the one side of the seat, and the auxiliary vibration damping assembly includes an auxiliary webbing and an elastic member connected to the auxiliary webbing. In the auxiliary vibration damping assembly, the auxiliary webbing passes through the upper fixing member and an end of the auxiliary webbing is connected to a D-ring. In a vehicle seat belt system, the main webbing connected to a webbing retractor passes through the D-ring to restrain the torso of a seat occupant, and the elastic member of the auxiliary vibration damping assembly provides a vibration damping and mitigation function. However, with the combination of the auxiliary vibration damping assembly and the main webbing as described above, the height of the upper position can only be adjusted within the limited vertical elastic displacement range provided by the elastic member, and therefore, it cannot be said to have a substantial height adjustment function.

[0009] The "webbing adjustment and vibration damping device" disclosed in Patent Documents 1 and 2 further includes a webbing adjustment device that includes an elastically deformable long strip connected between a D-ring and a vehicle body, and a connection base that is attached to the long strip and is capable of adjusting and positioning the vertical position, thereby forming a step-type height adjustment mechanism. In such a vehicle seat belt system, the main webbing connected to the webbing retractor passes through the D-ring and the connection base, and the connection base is used to adjust the upper height position at a plurality of predetermined positions on the long strip, while the elastically deformable function of the long strip provides vibration damping buffering performance.

[0010] In the above explanation, the vibration damping height adjuster disclosed in Patent Document 3, "Vibration Damping Height Adjuster for Use in Seat Belt Systems and Related Systems and Methods," includes a rail that can be attached to a pillar on one side of the seat, a D-ring slidably provided on the rail, an adjustment stopper that is slidably connected to the rail and can lock the D-ring at a plurality of positions along the rail, and a biasing member that presses the D-ring against the adjustment stopper to position it; by adjusting the height position of the D-ring on the rail with the adjustment stopper, the main webbing that is pulled out from the webbing take-up on one side of the seat passes through the D-ring of the vibration damping height adjuster and then extends downward to connect to the side of the seat, and the compressible biasing member causes the D-ring to move away from the stopper due to the tension of the main webbing that has passed through the D-ring, thereby achieving a vibration damping buffering effect.

[0011] In the above explanation, the webbing height adjuster disclosed in the application for "Height adjuster with anti-pinch function for use in seat belt system" of Patent Document 4 and the other application for "Height adjuster with anti-pinch function for use in seat belt system" of Patent Document 5 includes a fixed member fixed to a pillar on one side of the seat, an elastic member connected to the fixed member, and a length adjustment mechanism provided at the lower end of the elastic member, and the length adjustment mechanism is provided with a D-ring whose height position is adjustable, and the main webbing pulled out from the webbing take-up on one side of the seat passes through the D-ring of the vibration damping height adjuster and then extends downward to be connected to one side of the seat, so that by adjusting the height position of the D-ring with the length adjustment mechanism, the elastic member between the pillar and the D-ring can provide a vibration damping and cushioning effect.

[0012] According to the overall performance of the above-mentioned multiple webbing height adjustment mechanisms, the webbing height adjustment mechanisms are connected between the main webbing and the assistant webbing, and the height at the upper position is adjustable. The main webbing that passes through the webbing height adjuster is movable, and a restoring force for vibration damping and buffering is provided to the main webbing by a biasing member, an elastic member, or a long strip having a restoring force. However, when the above-mentioned conventional webbing height adjustment mechanisms are applied to a seat belt system on a vehicle seat, when an occupant on the seat connects the main webbing and attempts to adjust the height position of the D-ring or the D-ring around which the main webbing is looped, it is necessary to unlock the adjustment stopper or the length adjustment mechanism, respectively, which is very inconvenient in use and operation. [Prior art documents] [Patent documents]

[0013] [Patent Document 1] U.S. Patent No. 9,499,121 [Patent Document 2] U.S. Patent No. 9,738,248 [Patent Document 3] U.S. Patent No. 9,809,193 [Patent Document 4] U.S. Patent No. 10,953,847 [Patent Document 5] U.S. Patent No. 11,273,790 Summary of the Invention [Problem to be solved by the invention]

[0014] An object of the present invention is to provide a webbing height adjusting device to solve the problem of operational inconvenience when adjusting the height position of the upper position using a webbing height adjusting device applied to a conventional seat belt system. [Means for solving the problem]

[0015] In order to achieve the above object, the present invention proposes the following webbing height adjusting device, that is, a webbing height adjusting device used in a seat belt system of a vehicle, which is connected to a main webbing extending from a webbing retractor in the seat belt system, a vibration damping and mitigation assembly to be attached to the vehicle, the vibration damping and mitigation assembly including an auxiliary webbing, a D-ring provided at an upper end of the auxiliary webbing, and at least one elastic part connected to the auxiliary webbing, the D-ring and a lower end of the auxiliary webbing being connected to upper and lower positions of the vehicle, the auxiliary webbing having at least a flexible portion, the elastic members being located on sides of the flexible portion, the upper and lower ends of the elastic members being fixed to the auxiliary webbing above and below the flexible portion, respectively, the main webbing passing through the D-ring, both side portions of the main webbing located at the D-ring being a rear webbing portion and a front webbing portion, respectively, and the auxiliary webbing being positioned between the rear webbing portion and the front webbing portion; a webbing height adjuster that is provided below the D-ring and is connected between the front webbing portion of the main webbing and the auxiliary webbing so as to define an adjustable upper position; The webbing height adjuster is a main body including a frame, a webbing abutment portion and a webbing connection portion formed at an upper section and a lower section of the frame, respectively, wherein a movement space through which the auxiliary webbing passes is formed between the webbing abutment portion and the frame, and a main webbing passage through which a front section of the webbing passes is formed between the webbing connection portion and the frame; a slider attached to the moving space of the main body so as to be movable up and down and having an oblique groove through which the auxiliary webbing passes; an elastic member attached between the slider and the main body and providing a restoring force so that the slider can clamp the auxiliary webbing together with the webbing contact portion of the main body; a cover fitted onto the outside of the main body so as to be movable up and down, the cover being operable to relatively displace the slider and the main body so as to release the clamped state of the auxiliary webbing, and when released, the restoring force of the elastic member allows the slider and the main body to clamp the auxiliary webbing. 2. The webbing height adjusting device according to claim 1, wherein the auxiliary webbing has the flexible portion located at a lower stage thereof, at least one elastic portion is provided on one side or on opposite sides of the flexible portion, and upper and lower ends of the elastic portion are connected to positions above and below the flexible portion of the auxiliary webbing, respectively. In the webbing height adjusting device as described above, the auxiliary webbing has two flexible portions located at the upper and lower sections thereof, and at least one elastic portion is provided on one side or on opposite sides of each flexible portion, and the upper and lower ends of the elastic portion are connected to positions above and below the flexible portions of the auxiliary webbing, respectively.

[0016] In order to achieve the above object, the present invention proposes the following webbing height adjusting device, that is, a webbing height adjusting device used in a seat belt system of a vehicle, and connected to a main webbing extending from a webbing retractor in the seat belt system, a vibration damping and mitigation assembly to be attached to the vehicle, the vibration damping and mitigation assembly including an auxiliary webbing, a D-ring connected to an upper end of the auxiliary webbing, and an elastic portion connected to a lower end of the auxiliary webbing, the lower ends of the D-ring and the elastic portion being connected to upper and lower positions of the vehicle, respectively, the main webbing passing through the D-ring, portions of the main webbing on both sides located on the D-ring being a rear webbing portion and a front webbing portion, respectively, and the auxiliary webbing being located between the rear webbing portion and the front webbing portion; a webbing height adjuster that is provided below the D-ring and is connected between the front webbing portion of the main webbing and the auxiliary webbing so as to define an adjustable upper position; The webbing height adjuster is a main body including a frame, a webbing abutment portion and a webbing connection portion formed at an upper section and a lower section of the frame, respectively, wherein a movement space through which the auxiliary webbing passes is formed between the webbing abutment portion and the frame, and a main webbing passage through which a front section of the webbing passes is formed between the webbing connection portion and the frame; a slider attached to the moving space of the main body so as to be movable up and down and having an oblique groove through which the auxiliary webbing passes; an elastic member attached between the slider and the main body and providing a restoring force so that the slider can clamp the auxiliary webbing together with the webbing contact portion of the main body; a cover fitted onto the outside of the main body so as to be movable up and down, the cover being operable to relatively displace the slider and the main body to release the clamped state of the auxiliary webbing, and when released, the cover allowing the slider and the main body to clamp the auxiliary webbing by a restoring force of the elastic member.

[0017] In order to achieve the above object, the present invention proposes the following webbing height adjusting device, that is, a webbing height adjusting device used in a seat belt system of a vehicle, and connected to a main webbing extending from a webbing retractor in the seat belt system, a vibration damping and mitigation assembly to be attached to the vehicle, the vibration damping and mitigation assembly including an auxiliary webbing, two elastic portions connected to an upper end and a lower end of the auxiliary webbing, respectively, and a D-ring provided at the upper end of the upper elastic portion, the D-ring and the lower end of the lower elastic portion being connected to upper and lower positions of the vehicle, respectively, the main webbing passing through the D-ring, portions of the main webbing on both sides located at the D-ring being a rear webbing portion and a front webbing portion, respectively, and the auxiliary webbing being located between the rear webbing portion and the front webbing portion; a webbing height adjuster that is provided below the D-ring and is connected between the front webbing portion of the main webbing and the auxiliary webbing so as to define an adjustable upper position; The webbing height adjuster is a main body including a frame, a webbing abutment portion and a webbing connection portion formed at an upper section and a lower section of the frame, respectively, wherein a movement space through which the auxiliary webbing passes is formed between the webbing abutment portion and the frame, and a main webbing passage through which a front section of the webbing passes is formed between the webbing connection portion and the frame; a slider attached to the moving space of the main body so as to be movable up and down and having an oblique groove through which the auxiliary webbing passes; an elastic member attached between the slider and the main body and providing a restoring force so that the slider can clamp the auxiliary webbing together with the webbing contact portion of the main body; a cover fitted onto the outside of the main body so as to be movable up and down, the cover being operable to relatively displace the slider and the main body to release the clamped state of the auxiliary webbing, and when released, the restoring force of the elastic member allows the slider and the main body to clamp the auxiliary webbing. In the webbing height adjustment device as described above, an operation space is formed inside the upper section of the cover, and two abutments are located on both sides below the operation space, the webbing abutment portion at the upper end of the main body is movable up and down in the operation space of the cover, the abutment portions are located below the webbing abutment portion, and when the cover is pulled up, the abutment portions press against the webbing abutment portion of the main body, thereby moving the main body and the slider relatively, and the main body and the slider are moved relatively by operating the cover to abut against the slider downward. In the webbing height adjustment device as described above, opposing sides of the main body are a first side and a second side, the first side is a side of the main body facing away from the rear portion of the webbing, the front portion of the webbing of the main webbing and the auxiliary webbing each enter the first side of the main body and pass through the second side of the main body, and one end of the webbing abutting portion adjacent to the movement space has a webbing contact end portion, The slider includes end plates, side plates, and inter-plate connection portions, the end plates and the side plates are arranged in parallel at a pitch and are located on a first side and a second side of the main body, the inter-plate connection portion is formed between the end plates and the side plates so as to pass through the movement space of the main body, the diagonal groove is provided in the inter-plate connection portion and penetrates vertically along a diagonal direction from one end of the end plate adjacent to the webbing abutting portion to one end of the side plate adjacent to the webbing abutting portion, the top ends of the side plates are higher than the top ends of the end plates and the upper end groove openings of the diagonal grooves, and the one end of the end plate adjacent to the diagonal groove has a clamping surface that can clamp the auxiliary webbing together with the webbing contact end of the webbing abutting portion. In the webbing height adjustment device as described above, a perforation and an assembly hole below the perforation are formed in the frame, the perforation and the assembly hole are molded to cover a part extending from the webbing abutment portion at an upper section of the frame to an upper end of the perforation, and the movement space is formed between the perforation and the webbing abutment portion, The webbing connection portion is molded to cover the lower section of the frame, and the webbing connection portion is assembled with an assembly hole of the frame to form the main webbing passage. In the webbing height adjustment device as described above, the top of the webbing connection portion has an abutment surface extending to a lower portion of the perforation, and a position regulating post is formed on the abutment surface of the webbing connection portion, protruding toward the frame and having a pitch between it and the abutment surface, The elastic member is an arc-shaped elastic sheet that is low in the center and curves upward at both ends, with its middle portion positioned between the abutment surface of the webbing connection portion and the position regulating post, and its both end portions each abutting against the bottom of the end plate of the slider. In the webbing height adjustment device as described above, the cover includes a back plate located outside the second side of the main body and pressed against the top of the side plate, an outer plate located outside the first side of the main body, and an end plate connected to the top end of the back plate, the operation space is located below the end plate, a webbing penetration space communicating with the movement space from the first side of the main body is formed between the end plate and the outer plate, the end plate is located outside the webbing connection portion of the main body, and there is an operation pitch between the side of the operation space toward which the end plate faces and the webbing abutment portion of the main body. In the webbing height adjustment device as described above, the cover has side walls on both sides of the back plate and the end plate, the outer peripheral surfaces of which form anti-slip surfaces, and the back plate of the cover has an accommodating groove formed therein into which the side plate of the slider can enter. In the webbing height adjustment device as described above, the cover has a bridge portion formed on the outer plate such that there is a space between the bridge portion and the outer plate, allowing the main webbing to pass through the space between the bridge portion and the outer plate and further pass through the main webbing passage of the main body.

[0018] According to the invention of the webbing height adjusting device, when applied to a seat belt system of a vehicle, the following effects are achieved. 1. Provides height adjustment function for the upper position of the main webbing. According to the webbing height adjustment device of the present invention, the combination of a vibration damping buffer assembly and a webbing height adjuster mounted to a vehicle is connected between the main webbing of a seat belt system and the auxiliary webbing of the vibration damping buffer assembly, so that an occupant in a seat of the vehicle can manually adjust the height of the upper position. 2. Provides vibration damping and cushioning for occupants restrained in the seat. In the webbing height adjustment device of the present invention, the upper and lower ends of the vibration damping buffer assembly are provided at upper and lower positions on the sides of the vehicle seat, the main webbing passes through the D-ring located at the top, and the webbing height adjuster is connected between the main webbing of the seat belt system and the auxiliary webbing of the vibration damping buffer assembly, so that the connection of the elastic portion with the auxiliary webbing can provide a vibration damping buffer function to the main webbing that restrains the torso of the occupant on the seat. 3. Automatic locking function and good positioning effect. In the webbing height adjuster of the webbing height adjusting device of the present invention, the slider, subjected to the action of a restoring force, clamps the assistant webbing together with the webbing abutment portion of the main body, and as the elastic member continues to apply the action of a restoring force to the slider, the webbing height adjuster is automatically locked so as to be positioned on the assistant webbing. Also, when an occupant sits on the seat and accurately connects the main webbing, the assistant webbing located below the D-ring enters between the webbing abutment portion and the slider from one side of the main body and then passes through the other side of the main body, and the elastic member is pressed against the slider and the webbing abutment portion so that the slider and the webbing abutment portion clamp the assistant webbing, and the front portion of the main webbing that has passed through the D-ring enters from one side of the main body into the main webbing passage at the webbing connection portion and passes through the other side of the main body, and then the webbing of the main webbing is locked. The front section is redirected to restrain the torso of the occupant on the seat, and the tension of the main webbing increases due to the action of the winding force of the webbing winder on the main webbing, which in turn increases the tension of the auxiliary webbing via the webbing height adjuster.Therefore, when the webbing height adjuster has voluntarily clamped and locked the auxiliary webbing, the clamping and locking force between the main body of the webbing height adjuster and the slider on the auxiliary webbing increases as the tension of the auxiliary webbing and main webbing increases, resulting in a better and stronger positioning effect. 4. Excellent ease of operation In the webbing height adjusting device of the present invention, the webbing height adjuster is connected between the main webbing and the assistant webbing. Therefore, when adjusting the height position of the webbing height adjuster after it has formed an upper position above one side of the seat occupant, the seat occupant can grasp the cover and push down on the slider or apply force to the main body so that the slider or main body is relatively displaced against the restoring force of the elastic member, thereby directly and easily releasing the clamping action on the assistant webbing. Furthermore, the height position can be adjusted by sliding the webbing height adjuster along the main webbing and assistant webbing. Therefore, the device can be applied to a seat belt system, and can provide the seat occupant with good operational convenience. 5. Equipped with stepless height adjustment function. According to the present invention, the webbing height adjuster in the webbing height adjustment device is connected between the main webbing and the auxiliary webbing, and the slider, which is subjected to an elastic action, clamps the auxiliary webbing together with the webbing abutment portion of the main body, so that the main webbing can freely pass through the main webbing passage at the lower end of the main body of the webbing height adjuster, allowing an occupant sitting on the seat to freely adjust the height position. 6. Minimize the possibility of the webbing height adjuster changing position even if a force is applied to the seat occupant. As described above, in the webbing height adjuster connected between the main webbing and the assistant webbing, the slider, which is subjected to an elastic action, clamps the assistant webbing together with the webbing abutment portion of the main body, and the webbing height adjuster automatically locks and positions the assistant webbing. The main webbing, which is connected to a webbing retractor in a seat belt system, can freely pass through the main webbing passage at the lower end of the main body of the webbing height adjuster. Therefore, when a seat occupant correctly connects the main webbing, the webbing height adjuster receives the tension of the assistant webbing and thereby clamps the assistant webbing more firmly so that the position of the webbing height adjuster is fixed and immovable. In addition, there is a positive correlation between the clamping force of the webbing height adjuster on the assistant webbing and the tension of the main webbing, minimizing the possibility of the webbing height adjuster changing position. 7. When the same occupant sits on the seat, there is no need to readjust the position of the webbing height adjuster. As described above, in a webbing height adjuster connected between the main webbing and the assistant webbing, the slider, subjected to the restoring force, clamps the assistant webbing together with the webbing abutment portion of the main body, and the main webbing connected to the webbing reel in the seat belt system passes freely through the main webbing passage in the main body of the webbing height adjuster. Therefore, when an occupant leaves the seat, the main webbing is automatically retracted by the webbing reel and the position of the webbing height adjuster on the assistant webbing does not change. Therefore, after an occupant on the seat adjusts the position of the webbing height adjuster, unless another occupant adjusts the position of the webbing height adjuster on the assistant webbing, there is no need to readjust the position of the webbing height adjuster when the original occupant sits on the seat again.

[0019] Furthermore, in the webbing height adjusting device of the present invention, a bridge structure formed on the outer plate of the cover in the webbing height adjuster allows the main webbing to pass between the bridge portion of the cover and the outer plate and further pass through the main webbing passage in the main body, and therefore, by guiding the main webbing in a direction approaching the webbing height adjuster with the assistance of the bridge portion, the main webbing can move smoothly. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a reference diagram showing a state in which an embodiment of a webbing height adjusting device of the present invention is applied to a seat belt system; [Figure 2] 10 is a reference view showing a state in which another embodiment of the webbing height adjusting device of the present invention is applied to a seat belt system; [Figure 3A] 1 is a schematic diagram of an embodiment of the auxiliary webbing and elastic portion of the vibration damping buffer assembly in the embodiment of the webbing height adjusting device of the present invention; [Figure 3B] 1 is a schematic diagram of an embodiment of the auxiliary webbing and elastic portion of the vibration damping buffer assembly in the embodiment of the webbing height adjusting device of the present invention; [Figure 3C]1 is a schematic diagram of an embodiment of the auxiliary webbing and elastic portion of the vibration damping buffer assembly in the embodiment of the webbing height adjusting device of the present invention; [Figure 3D] 1 is a schematic diagram of an embodiment of the auxiliary webbing and elastic portion of the vibration damping buffer assembly in the embodiment of the webbing height adjusting device of the present invention; [Figure 4] 10 is a reference diagram showing a state in which another embodiment of the webbing height adjusting device of the present invention is applied to a seat belt system. FIG. [Figure 5] 10 is a reference diagram showing a state in which another embodiment of the webbing height adjusting device of the present invention is applied to a seat belt system. FIG. [Figure 6] FIG. 6 is a perspective view of the appearance of a webbing height adjuster in the webbing height adjusting device shown in FIGS. 1, 2, 4, and 5. [Figure 7] 6 is an external perspective view of the webbing height adjuster in the webbing height adjusting device shown in FIGS. 1, 2, 4, and 5, as viewed from another angle. FIG. [Figure 8] FIG. 8 is a side plan view of the webbing height adjuster shown in FIGS. 6 and 7. [Figure 9] FIG. 8 is a partial exploded perspective view of a cover in the webbing height adjuster shown in FIGS. 6 and 7. [Figure 10] 8 is a partially exploded perspective view of the cover of the webbing height adjuster shown in FIGS. 6 and 7, seen from another angle. FIG. [Figure 11] FIG. 11 is an exploded perspective view of a main body, a slider, and an elastic member in the webbing height adjuster shown in FIGS. 6, 7, 9, and 10. [Figure 12] FIG. 11 is an exploded perspective view of the main body, the slider, and the elastic member in the webbing height adjuster shown in FIGS. 6, 7, 9 and 10, viewed from another angle. [Figure 13] FIG. 13 is a perspective view of a frame in the main body shown in FIGS. [Figure 14] FIG. 13 is a side cross-sectional view of the webbing height adjuster shown in FIGS. 6 to 12. [Figure 15] 15 is a schematic cross-sectional view of the embodiment of the webbing height adjuster shown in FIG. 8 taken along line 15-15. [Figure 16] 7 is a perspective view showing a state in which the webbing height adjuster shown in FIG. 6 is installed to penetrate through the main webbing and the auxiliary webbing. FIG. [Figure 17] 7 is a side cross-sectional view showing a state in which the webbing height adjuster shown in FIG. 6 is installed to penetrate through a main webbing and an auxiliary webbing. FIG. [Figure 18] FIG. 10 is an external perspective view of another embodiment of the webbing height adjuster in the webbing height adjusting device of the present invention. [Figure 19] FIG. 19 is a side cross-sectional view of the webbing height adjuster shown in FIG. 18. [Figure 20] 19 is a perspective view showing a state in which the webbing height adjuster shown in FIG. 18 is installed to penetrate through the main webbing and the auxiliary webbing. FIG. [Figure 21] 19 is a side cross-sectional view showing a state in which the webbing height adjuster shown in FIG. 18 is sandwiched between the main webbing and the auxiliary webbing after being inserted through the main webbing and the auxiliary webbing. FIG. [Figure 22] 5 is a reference schematic diagram showing a state in which the webbing height adjusting device shown in FIGS. 1 and 4 is in a clamping state. FIG. [Figure 23] 23 is a schematic view of the operation of the webbing height adjuster shown in FIG. 22 when the height position is adjusted upward, as viewed from another viewing angle. FIG. [Figure 24A] 24A is a first schematic side cross-sectional view of the webbing height adjuster shown in FIG. 23 when the height position is adjusted upward. FIG. [Figure 24B] 24B is a second schematic side cross-sectional view of the webbing height adjuster shown in FIG. 23 when the height position is adjusted upward. FIG. [Figure 25] 23 is a schematic view of the operation of the webbing height adjuster shown in FIG. 22 when the height position is adjusted downward, as viewed from another viewing angle. FIG. [Figure 26] 26 is a side cross-sectional view taken along line 26-26 of the webbing height adjuster shown in FIG. 25 when the height position is adjusted downward. FIG. [Figure 27]23 is a schematic diagram (1) of another operation method when adjusting the height position by applying pressure to the webbing height adjuster shown in FIG. 22. FIG. [Figure 28] 23 is a schematic diagram (II) of another operation method when adjusting the height position by applying pressure to the webbing height adjuster shown in FIG. 22. FIG. [Figure 29] 23 is a schematic diagram (III) of another operation method when adjusting the height position by applying pressure to the webbing height adjuster shown in FIG. 22. FIG. [Figure 30] FIG. 5 is a reference diagram of the webbing height adjuster when no occupant is on the seat shown in FIGS. 1 and 4. DETAILED DESCRIPTION OF THE INVENTION

[0021] 1, 2, 4, and 5 are each diagrams showing different embodiments when a webbing height adjusting device of the present invention is applied to a seat belt system 1 for a vehicle seat, the seat belt system 1 including a webbing retractor 1B located on the side of the vehicle seat closer to the pillar and a main webbing 1A extending from the webbing retractor 1B, the main webbing 1A being a flexible member that cannot be elastically deformed and having an end fixedly mounted below the pillar and spaced apart from the webbing retractor 1B, the webbing retractor 1B automatically retracting the main webbing 1A, and the main webbing 1A is provided with a connection tongue 1C that is detachably attached to a seat buckle 1D on the other side of the seat (i.e., the side away from the pillar). Note that because the seat belt system 1 is a conventional product, its specific structure will not be described in detail.

[0022] As shown in Figures 1, 2, 4 and 5, the webbing height adjusting device of the present invention is used in the seat belt system 1 and is connected to the main webbing 1A. The webbing height adjusting device includes a vibration damping buffer assembly 2 and a webbing height adjuster 3. The specific structures of the vibration damping buffer assembly 2 and the webbing height adjuster 3 will be described below.

[0023] 1, 2, 4, and 5, the upper and lower ends of the vibration-damping buffer assembly 2 are fixed to a vehicle and located on the side of the seat closest to the pillar, and in several embodiments shown in those drawings, the upper and lower ends of the vibration-damping buffer assembly 2 are fixed to above and below the pillars on the sides of the vehicle seat, but are not limited to this. Basically, the vibration-damping buffer assembly 2 includes an assistant webbing 2A, at least one elastic part 2B connected to the assistant webbing 2A, and a D-ring 2C located at the upper part and connected to the assistant webbing 2A or the elastic part 2B, through which the main webbing 1A of the seat belt system 1 can pass, wherein the assistant webbing 2A is a flexible member that cannot be elastically deformed, the elastic part 2B is a member that is elastically deformable and has vibration-damping buffering properties, such as an elastic sheet, and the D-ring 2C is a member made of a rigid material (such as an iron-based metal material or other material) that has sufficient strength to support the main webbing 1A, the assistant webbing 2A, and the elastic part 2B. The following will be described in order based on the embodiments shown in FIGS. 1, 2, 4 and 5.

[0024] 1 and 2, the vibration damping buffer assembly 2 includes an assistance webbing 2A, at least one elastic portion 2B, and a D-ring 2C, the upper end of the assistance webbing 2A is connected to the D-ring 2C and connected to an upper position of a pillar on the side of the seat via the D-ring 2C, the lower end of the assistance webbing 2A is fixed to the pillar on the side of the seat and is located below the D-ring 2C, the assistance webbing 2A has at least one flexible portion 21A, and at least one elastic portion 2B is provided on one side of the flexible portion 21A, or at least one elastic portion 2B is provided on each of opposing sides of the flexible portion 21A, and the upper and lower ends of the elastic portion 2B are fixed above and below the flexible portion 21A of the assistance webbing 2A, respectively. The number and installation positions of the flexible portions 21A can be set according to actual product requirements.

[0025] 1 and 3B, the lower section of the assistant webbing 2A has a flexible portion 21A, and elastic portions 2B are provided on opposing sides of the flexible portion 21A. In the embodiment shown in Fig. 2 and 3B, the upper and lower sections of the assistant webbing 2A each have a flexible portion, and elastic portions 2B are provided on opposing sides of each flexible portion 21A, and a D-ring 2C is a member through which the main webbing 1A is inserted. As a result, when a force is applied to the assistant webbing 2A, the flexible portion 21A is pulled and the elastic portions 2B elastically deform to cancel out a portion of the force acting on the assistant webbing 2A, thereby allowing the vibration damping buffering performance of the vibration damping buffering assembly 2 to be exhibited.

[0026] In the vibration-damping buffer assembly 2 of the embodiment shown in FIG. 3A, in addition to a configuration in which elastic portions 2B are provided on opposite sides of the flexible portion 21A in the assistance webbing 2A, as shown in FIG. 3A, the vibration-damping buffer assembly 2 may be configured such that an elastic portion 2B is provided on one side of the flexible portion 21A in the assistance webbing 2A, as shown in FIG. 3C, the vibration-damping buffer assembly 2 may be configured such that an elastic portion 2B is provided on one side of the flexible portion 21A in the assistance webbing 2A and two elastic portions 2B are provided on the other side of the flexible portion 21A, as shown in FIG. 3D, and all of these configurations can exhibit vibration-damping buffering performance.

[0027] 4, the vibration-damping buffer assembly 2 includes an assistant webbing 2A, an elastic portion 2B, and a D-ring 2C. The upper end of the assistant webbing 2A is connected to the D-ring 2C, the upper end of the elastic portion 2B is connected to the lower end of the assistant webbing 2A, and the assistant webbing 2A is connected to an upper portion of a pillar on the side of the seat via the D-ring 2C. The lower end of the elastic portion 2B is fixed to the pillar on the side of the seat and is located below the D-ring 2C, and the main webbing 1A passes through the D-ring 2C. As a result, when the assistant webbing 2A receives a force, the elastic portion 2B elastically deforms and is indirectly pulled, thereby counteracting a portion of the force acting on the assistant webbing 2A, and the vibration-damping buffer assembly 2 exhibits vibration-damping buffering performance. The elastic portion 2B and the assistant webbing 2A may be connected by sewing, or a connecting ring coupled to the elastic portion 2B may be connected to the assistant webbing 2A.

[0028] 5, the vibration-damping buffer assembly 2 includes an assistant webbing 2A, two elastic portions 2B connected to the upper and lower ends of the assistant webbing 2A, and a D-ring 2C. The upper end of the upper elastic portion 2B is connected to the D-ring 2C and connected to an upper position of a pillar on the side of the seat via the D-ring 2C. The lower end of the lower elastic portion 2B is fixed to the pillar on the side of the seat, and the main webbing 1A is inserted through the D-ring 2C. As a result, when the assistant webbing 2A receives a force, the elastic portion 2B is indirectly pulled and elastically deformed, thereby canceling out a portion of the force acting on the assistant webbing 2A, thereby providing vibration-damping buffering performance by the vibration-damping buffer assembly 2. The two elastic portions 2B and the assistant webbing 2A may be connected by sewing or via a connecting ring.

[0029] As shown in FIGS. 1, 2, 4, and 5, in each of the above-described embodiments, the main webbing 1A of the seat belt system 1 passes through a D-ring 2C located at an upper position of the pillar on the side of the seat, the portion of the main webbing 1A between the webbing reel 1B and the D-ring 2C is a rear webbing portion 11A, and the other portion of the main webbing 1A that has passed through the D-ring 2C is a front webbing portion 12A, which is a portion for restraining the torso of an occupant on the seat in a diagonal direction, and the auxiliary webbing 2A of the vibration damping buffer assembly 2 is located between the rear webbing portion 11A and the front webbing portion 12A of the main webbing 1A.

[0030] 6 to 10, the webbing height adjuster 3 is provided below the ring 2C and is connected between the front webbing portion 12A of the main webbing 1A and the auxiliary webbing 2A so as to form an adjustable upper position, and the webbing height adjuster 3 is configured to include a main body 30, a slider 40, an elastic member 50, and a cover 60. The specific structure of each member of the webbing height adjuster 3 will be described in detail below.

[0031] 11 to 13, the main body 30 has a frame 31, a webbing abutment portion 32, and a webbing connection portion 33. Opposite sides of the main body 30 are a first side 301 and a second side 302, respectively. The frame 31 is a member made of a rigid material, which may be an iron-based metal material or other material. The frame 31 has a perforation 311 and an assembly hole 312 formed below the perforation 311. In this embodiment, the perforation 311 includes a perforation base 3111 and an extended hole portion 3112 provided below the perforation base 3111 so as to be continuous with the perforation base 3111. The width of the perforation base 3111 is wider than the width of the extended hole portion 3112.

[0032] 9 to 12 and 14 , the webbing abutting portion 32 is molded from a plastic material and covers the upper part of the frame 31. A movement space 321, which is a space through which the assistance webbing 2A passes, is formed between the webbing abutting portion 32 and the perforation 311 of the frame 31, and the webbing abutting portion 32 is a portion with which the assistance webbing 2A abuts. The webbing abutting portion 32 is preferably molded from a plastic material that has excellent abrasion resistance. In this embodiment, the lower end of the webbing abutting portion 32 partially extends into the upper end of the perforation base 3111, the space from the bottom surface of the webbing abutting portion 32 to the bottom edge of the perforation base 3111 of the perforation 311 is the movement space 321, and the bottom end of the webbing abutting portion 32 adjacent to the movement space 321 is a webbing contact end portion 322 that is a portion that comes into contact with the assistance webbing 2A.

[0033] 9 to 12 and 14, the webbing connection portion 33 is molded from a plastic material and covers the lower section of the frame 31. By joining the webbing connection portion 33 with the lower end of the assembly hole 312 in the frame 31, a main webbing passage 331 through which the main webbing 1A passes is formed, and the webbing connection portion 33 is a portion with which the main webbing 1A abuts. The webbing connection portion 33 is preferably molded from a plastic material that has excellent abrasion resistance. Furthermore, both the upper and lower wall surfaces of the webbing connection portion 33 in the main webbing passage 331 present arcuate surfaces, which allows the main webbing 1A to pass smoothly through the main webbing and allows the main webbing 1A to abut against the upper or lower wall surface of the main webbing passage 331 and be redirected in another direction, as shown in FIGS. 16 and 17.

[0034] As shown in FIGS. 11, 12 and 14, in this embodiment, the top of the webbing connecting portion 33 has a contact surface 332 that extends to the stretched hole portion 3112 of the perforation 311, and the contact surface 332 of the webbing connecting portion 33 is provided with a position regulating post that protrudes toward the stretched hole portion 3112 of the frame 31 and has a pitch between it and the contact surface 332.

[0035] As shown in Figures 9 to 12 and 14, the slider 40 is attached to the moving space 321 of the main body 30 so that it can move up and down, has a diagonal groove 44 through which the assistant webbing 2A passes, and together with the webbing abutment portion 32 of the main body 30, clamps and positions the assistant webbing 2A, and can move along the assistant webbing 2A.

[0036] 9 to 12 and 14 , in this embodiment, the slider 40 includes an end plate 41, a side plate 42, and two inter-plate connecting portions 43. The end plate 41 and the side plate 42 are arranged in parallel with each other at a pitch. The two inter-plate connecting portions 43 are integrally molded between the end plate 41 and the side plate 42. Diagonal grooves 44 are provided in the two inter-plate connecting portions 43 and penetrate obliquely upward and downward toward the bottom ends of the side plates 42. When the slider 40 is attached to the movement space 321 of the main body 30, the end plate 41 and the side plates 42 are located on the first side 301 and the second side 302 of the main body 30, respectively, and the two inter-plate connecting portions 43 are located in the movement space 321. The top of the end plate 41 has a clamping surface 411 that can clamp the auxiliary webbing 2A together with the webbing contact end portion 322 at the bottom end of the webbing abutting portion 32 adjacent to the movement space 321.

[0037] In this embodiment, the top end of the side plate 42 is higher than the top end of the end plate 41 and the upper groove opening of the diagonal groove 44, and an attachment groove 412 extending upward is further formed in the bottom of the end plate 41. In addition, in the embodiment shown in Figures 10 and 12, a sliding groove 323 is formed in the second side 302 of the webbing abutting portion 32 of the main body 30, and the side plate 42 of the slider 40 is inserted into the sliding groove 323, allowing vertical movement.

[0038] As shown in Figures 9 to 12 and 14, the elastic member 50 is attached between the slider 40 and the top of the webbing connection portion 33, and the slider 40, together with the webbing abutment portion 32 of the main body 30, clamps and positions the auxiliary webbing 2A while providing a restoring force; when the slider 40 is operated to descend relative to the main body 30 or the main body 30 is operated to ascend relative to the slider 40, the action of the slider 40 clamping the auxiliary webbing 2A together with the main body 30 is released, releasing the auxiliary webbing 2A, and the elastic member 50 is compressed to store restoring force energy.

[0039] The elastic member 50 may be a spring, an elastic sheet, or other equivalent elastic member, and the number of elastic members may be increased according to actual needs. As shown in Figures 9 to 12 and 14, in this embodiment, the elastic member 50 is an arc-shaped elastic sheet 51 that is low in the center and curves upward at both ends. The middle portion 511 of the elastic sheet 51 abuts against the abutment surface 332 of the webbing connection portion 33. The position-regulating posts 333 regulate the position of the arc-shaped elastic sheet 51 above the middle portion 511. The both ends of the arc-shaped elastic sheet 51 abut against the bottom of the end plate 41 of the slider 40 and extend upward into the mounting groove 412 at the bottom of the end plate 41. The both ends of the arc-shaped elastic sheet 51 abut against both sides of the top wall of the mounting groove 412. This allows the elastic member 50 to provide an equal restoring force to both sides of the slider 40, thereby enabling stable relative movement between the slider 40 and the main body 30.

[0040] As shown in Figures 6, 7, 14 and 15, the cover 60 is assembled to the outside of the upper section of the main body 30, and the slider 40 or the main body 30 is displaced relatively to release the clamped state of the auxiliary webbing 2A, and further, the webbing height adjuster 3 is moved up and down along the main webbing 1A and the auxiliary webbing 2A, and the height of the upper position can be adjusted by operating the slider 40 or the main body 30.

[0041] As shown in Figures 9 and 10, in this embodiment, the cover 60 can be a member formed by a cover base 60A and a cover lid 60B that are fitted together and fixed, and the inner surfaces of the cover base 60A and the cover lid 60B are provided with a plurality of ribs 601A and 601B, respectively, to enhance the mechanical strength of the cover base 60A and the cover lid 60B. As shown in Figures 6 to 9, 14 and 15, two abutment portions 60C are formed inside the upper part of the cover 60, located on both sides of the operation space 600 and below the operation space 600, and the webbing abutment portion 32 at the upper end of the main body 30 is movable up and down in the operation space 600 of the cover 60, and the abutment portion 60C is located below the webbing abutment portion 32, and when the cover 60 is pulled up, the abutment portion 60C is pressed against the webbing abutment portion 32 of the main body 30, allowing the main body 30 and the slider 40 to move relative to each other, and the bottom of the cover 60 is brought into contact downward with the side plate 42 of the slider 40, allowing the main body 30 and the slider 40 to move relative to each other.

[0042] As shown in FIGS. 6 to 9 and 14, in this embodiment, the cover 60 is located on one side of the side plate 42 of the slider 40 (i.e., the second side 302 of the main body 30) and includes a back plate 61 that abuts on the top of the side plate 42, an outer plate 62 that is located on the outside of the end plate 41 of the slider 40 (i.e., the first side 301 of the main body 30), and an end plate 63 that is connected to the top end of the back plate 61. A webbing insertion space is formed between the end plate 63 and the top end of the outer plate 62, and the end plate 63 is connected to the webbing abutment portion of the main body 30. 32, the auxiliary webbing 2A passes from above one side of the cover 60 through the webbing insertion space, the movement space 321 of the main body 30, and the diagonal groove 44 of the slider 40, and then extends downward from the other side of the cover 60, thereby being sandwiched between the slider 40 and the main body 30 under elastic action, and the main webbing 1A passes through the outside of the outer plate 62 of the cover 60 and through the main webbing passage 331 in the webbing connection portion 33 of the main body 30, and then extends downward to the other side.

[0043] 16 and 17 , when the slider 40 and the main body 30 relatively clamp the assistance webbing 2A, the cover 60 naturally descends due to gravity and abuts against the top of the side plate 42 of the slider 40 that is pressed upward by the elastic member 50, and furthermore, there is an operating pitch S between the bottom surface of the end plate 63 of the cover 60 and the top of the webbing abutting portion 32 of the main body 30. By operating the cover 60 downward to abut against the slider 40, the slider 40 and the main body 30 move relatively by the distance of the operating pitch S, and further, the bottom surface of the end portion 63 of the cover 60 comes into contact with the top of the webbing abutting portion 32 of the main body 30, so that the distance of relative movement between the slider 40 and the main body 30 is limited, thereby preventing the elastic member 50 from being deformed by an excessive acting force and thereby maintaining an appropriate elastic effect of the elastic member 50 between the slider 40 and the main body 30. In addition, the webbing abutment portion 32 at the upper end of the main body 30 can move up and down in the operating space 600 of the cover 60, but the movement distance is limited by the lower part of the abutment portion 60C of the webbing abutment portion 32, so separation of the cover 60 and the main body 30 can be prevented.

[0044] As shown in Figures 6 and 7, in this embodiment, the back plate 61 of the cover 60 and the end plate 63 connected to the top end of the back plate 61 each have side walls 65 on their outer peripheries that form anti-slip surfaces 651, so that an occupant on the seat can grip the cover 60 and operate it by displacing the slider 40 and the main body 30 relative to each other.

[0045] As shown in FIG. 14, in this embodiment, a receiving groove 611 capable of receiving the top end of the side plate 42 of the slider 40 is further formed in the bottom portion of the back plate 61 of the cover 60, thereby allowing the cover 60 to directly link with the slider 40.

[0046] As in other embodiments shown in Figures 18 to 21, the cover 60 has an outer plate 62 further formed with a bridge 66 having a space between it and the outer plate 62, which allows the main webbing 1A to pass through the space between the bridge 66 and the outer plate 62 and further pass through the main webbing passage 331 in the webbing connection portion 33 of the main body 30.Therefore, with the assistance of the bridge 66 in the cover 60, the main webbing 1A can be guided in a direction approaching the webbing height adjuster 3.

[0047] When the webbing height adjusting device according to the present invention is applied to a seat belt system 1 of a vehicle, as shown in Figures 1, 2, 4, and 5, the auxiliary webbing 2A of the auxiliary webbing assembly 2 of the webbing height adjusting device according to the present invention is located between the rear webbing portion 11A and the front webbing portion 12A of the main webbing 1A, and the webbing height adjuster 3 is attached below the D-ring 1C of the auxiliary webbing assembly 2 and connected between the front webbing portion 12A of the main webbing 1A and the auxiliary webbing 2A. Therefore, the webbing height adjuster 3 is placed horizontally due to the action of gravity, and its upper position is configured above the shoulders of the seat occupant, allowing the seat occupant to adjust the height of the upper position to suit their body shape. Furthermore, the webbing height adjuster 3 is connected between the auxiliary webbing 2A and the main webbing 1A, and has a stepless height position adjustment function. Furthermore, the vibration damping buffer assembly 2 having the elastic portion 2B can provide a vibration damping buffer function to the main webbing 1A that restrains the torso of the seat occupant by means of the webbing height adjuster 3.

[0048] 1, 4, and 22, the webbing height adjuster 3 is connected between the webbing front portion 12A of the main webbing 1A and the auxiliary webbing 2A, and the auxiliary webbing 2A passes from above on one side of the cover 60 through the movement space 321 of the main body 30 and the diagonal groove 44 of the slider 40, and then extends downward from the other side of the cover 60. The auxiliary webbing 2A is relatively clamped between the clamping surface 411 of the end plate 41 of the slider 40, which abuts against the elastic member 50, and the webbing contact end portion 322 of the webbing abutting portion 32 of the main body 30, and the webbing height adjuster 3 is fixed on the auxiliary webbing 2A, so that the elastic action of the elastic member 50 on the slider 40 can maintain the position of the webbing height adjuster 3 clamped by the auxiliary webbing 2A. Meanwhile, the webbing front portion 12A of the main webbing 1A after passing through the D-ring 2C of the auxiliary webbing assembly 2 extends from above one side of the cover 60 above the first side 301 of the main body 30, through the outside of the outer panel 62, through the main webbing passage 331 in the webbing connection portion 33 of the main body 30, and downward from the second side 302 of the main body 30, and the webbing height adjuster 3 is connected between the webbing front portion 12A of the main webbing 1A and the auxiliary webbing 2A, thereby forming the upper position.

[0049] As described above, the webbing height adjuster 3 is fixed to the assistance webbing 2A and is also fixed to a predetermined location on the assistance webbing 2A, and the main webbing 1A is pulled by the webbing height adjuster 3 and can pass freely through the webbing height adjuster 3. Therefore, the webbing front portion 12A of the main webbing 1A is redirected at the bottom of the webbing connection portion 33 to restrain the shoulders and chest of the occupant on the seat, thereby reducing discomfort felt by the occupant on the seat who is restrained by the main webbing 1A.

[0050] 1, 4, 22, 23, 24A, and 24B, in an operation method in which an occupant on a seat adjusts the height position (i.e., the height position in the upper position) of the webbing height adjuster 3 connected between the main webbing 1A and the assistance webbing 2A, the occupant on the seat simply grasps the cover 60 and presses the main body 30 upward. That is, by pressing the webbing abutting portion 32 of the main body 30 upward with the abutting portion 60C of the cover 60, the main body 30 and the slider 40 can be moved relative to each other to release the locked state of the assistance webbing 2A. This allows the height of the webbing height adjuster 3 to be adjusted upward along the assistance webbing 2A and the webbing front portion 12A of the main webbing 1A. Furthermore, after adjusting to an appropriate height position, when the cover 60 is released, the elastic action of the elastic member 50 presses the slider 40 and the main body 30 together, returning the assistance webbing 2A to a tightened state and maintaining the height position of the webbing height adjuster 3, so that the webbing height adjuster 3 has excellent convenience in operation.

[0051] 1, 4, 22, 25, and 26, when adjusting the height position of the webbing height adjuster 3 downward, the occupant on the seat grasps the cover 60 and presses the slider 40 downward, causing the cover 60 to press against the side plate 42 of the slider 40, thereby moving the slider 40 and the main body 30 relative to each other and releasing the locked state of the assistance webbing 2A, thereby allowing the height position to be adjusted downward. After adjusting to an appropriate height position, when the cover 60 is released, the slider 40 and the main body 30 are pressed against each other by the elastic action of the elastic member 50, returning the assistance webbing 2A to a state in which it is fastened, and therefore the webbing height adjuster 3 can be fixed at the height position of the assistance webbing 2A and the webbing front portion 12A of the main webbing 1A.

[0052] 1, 4, 22, and 27 to 29, in the present invention, the height position of the webbing height adjuster 3 may be adjusted using other operating methods. For example, when it is necessary to adjust the webbing height adjuster 3 up or down, an occupant on the seat can grasp the webbing height adjuster 3 and simultaneously press both the cover 60 and the main body 30 to relatively displace the slider 40 and the main body 30 until the assistant webbing 2A is in the unlocked state. In this way, the assistant webbing 2A can pass smoothly between the slider 40 and the main body 30, so that the occupant on the seat can grasp the webbing height adjuster 3 and adjust the height position upward or downward along the assistant webbing 2A and the webbing front portion 12A of the main webbing 1A. Then, after adjusting the webbing height adjuster 3 to an appropriate height position, when the webbing height adjuster 3 is released, the elastic action of the elastic member 50 presses the slider 40 and the main body 30 together, returning the assistance webbing 2A to a locked state, thereby maintaining the height position of the webbing height adjuster 3.

[0053] As shown in Figures 1, 4, 20 and 22, when an occupant sits on the seat and accurately connects the main webbing 1A, the assistant webbing 2A located below the D-ring 2C enters between the webbing abutment portion 32 and the slider 40 from the first side 301 of the main body 30 of the webbing height adjuster 3 and passes through the second side 302 of the main body 40, and the elastic member 50 is pressed against the slider 40 and the webbing abutment portion 32, causing the slider 40 and the webbing abutment portion 32 to clamp the assistant webbing 2A. Then, the webbing front portion 12A of the main webbing 1A that has passed through the D-ring 2C movably enters the main webbing passage 331 at the webbing connection portion 33 from the first side 301 of the main body 30, passes through the second side 302 of the main body 30, and then the webbing front portion 12A of the main webbing 1A bypasses the webbing connection portion 33 of the main body 30 and is redirected to restrain the torso of the occupant on the seat. At the same time, the tension of the main webbing 1A increases due to the action of the winding force on the main webbing 1A by the webbing reel 1B. Since the webbing front portion 12A of the main webbing 1A, which restrains the torso of the seat occupant, increases the tension of the assistance webbing 2A via the webbing height adjuster 3, assuming that the webbing height adjuster 3 automatically clamps and locks the assistance webbing 2A, as the tension of the assistance webbing 2A increases, the clamping and locking force of the main body 30 and slider 40 of the webbing height adjuster 3 on the assistance webbing 2A increases, thereby achieving a better positioning effect to maintain the webbing height adjuster 3 at an appropriate height position. In other words, there is a positive correlation between the clamping force and the tension of the main webbing 1A, minimizing the possibility of the position of the webbing height adjuster 3 changing.

[0054] 30, when there is no occupant in a vehicle seat, the main webbing 1A in an unused seat belt system is automatically taken up by the webbing take-up device 1B, with the webbing front portion 12A of the main webbing 1A passing directly through the main webbing passage 331 of the webbing height adjuster 3 and then naturally passing through the webbing height adjuster 3 and the D-ring 2C and being taken up, thereby shortening the length of the in-webbing 1A. Meanwhile, the webbing height adjuster 3 connected between the main webbing 1A and the auxiliary webbing 2A presses the slider 40 against the webbing abutment portion 32 by the elastic member 50 so that the slider 40 and the main body 30 clamp the auxiliary webbing 2A until the slider 40 and the main body 30 reach the locked state, thereby maintaining the height position of the webbing height adjuster 3. In this way, even if an occupant on the seat leaves the seat after adjusting the position of the webbing height adjuster 3, unless another occupant adjusts the position of the webbing height adjuster 3 on the main webbing 1A, when the original occupant sits on the seat again and connects the main webbing 1A, the webbing front portion 12A of the main webbing 1A is pulled and restrains the torso of the occupant on the seat in a diagonal direction. As a result, the webbing height adjuster 3 is still maintained at the previously set height position, and there is no need to readjust the height position of the webbing height adjuster 3. [Explanation of symbols]

[0055] 1 Seatbelt system 1A Main Webbing 1B Webbing reel 1C connection tongue 1D seat buckle 2 Assistance Webbing Assembly 2A Assistance Webbing 2B Elastic part 2C D-ring 3 Webbing height adjuster 30 Main Unit 301 First side 302 Second side 31 frames 311 Perforation 3111 Perforated base 3112 Extension hole part 312 Assembly hole 32 Webbing contact part 321 Moving Space 322 Webbing contact end 323 Sliding groove 33 Webbing connection 331 Main webbing passage 332 Contact surface 333 Position Control Pillar 40 Slider 41 End plate 411 Clamping surface 412 Mounting groove 42 Side panel 43 Plate-to-plate connection 44 Diagonal groove 50 Elastic member 51 Arc-shaped elastic sheet 511 Middle part 512 End 60 Cover 600 Operation space 60A Cover Base 601A Rib 60B Cover lid 601B Rib 60C Abutment part 61 Back plate 611 Storage groove 62 Outer Panel 63 End plate 65 Side wall 651 Non-slip surface 66 Bridge

Claims

1. A webbing height adjustment device for use in a seat belt system of a vehicle, the webbing height adjustment device being connected to a main webbing extending from a webbing retractor in the seat belt system, comprising: a vibration damping and mitigation assembly to be attached to the vehicle, the vibration damping and mitigation assembly including an auxiliary webbing, a D-ring provided at an upper end of the auxiliary webbing, and at least one elastic part connected to the auxiliary webbing, the D-ring and the lower end of the auxiliary webbing being connected to upper and lower positions of the vehicle, the auxiliary webbing having at least a flexible portion, the elastic members being located on sides of the flexible portion, the upper and lower ends of the elastic members being fixed to above and below the flexible portion of the auxiliary webbing, respectively, the main webbing passing through the D-ring, both side portions of the main webbing located at the D-ring being a rear webbing portion and a front webbing portion, and the auxiliary webbing being located between the rear webbing portion and the front webbing portion; a webbing height adjuster that is provided below the D-ring and is connected between the front webbing portion of the main webbing and the auxiliary webbing so as to define an adjustable upper position; The webbing height adjuster is a main body including a frame, a webbing abutment portion and a webbing connection portion formed at an upper section and a lower section of the frame, respectively, wherein a movement space through which the auxiliary webbing passes is formed between the webbing abutment portion and the frame, and a main webbing passage through which a front section of the webbing passes is formed between the webbing connection portion and the frame; a slider attached to the moving space of the main body so as to be movable up and down and having an oblique groove through which the auxiliary webbing passes; an elastic member attached between the slider and the main body and providing a restoring force so that the slider can clamp the auxiliary webbing together with the webbing contact portion of the main body; a cover fitted onto the outside of the main body so as to be movable up and down, the cover being operable to relatively displace the slider and the main body to release the clamped state of the auxiliary webbing, and when released, the restoring force of the elastic member allows the slider and the main body to clamp the auxiliary webbing.

2. The auxiliary webbing has the flexible portion located at its lower stage, 2. The webbing height adjustment device according to claim 1, wherein at least one elastic portion is provided on one side or on opposite sides of the flexible portion, and upper and lower ends of the elastic portion are connected to positions above and below the flexible portion of the auxiliary webbing, respectively.

3. The auxiliary webbing has two flexible portions located at its upper and lower stages, respectively, 2. The webbing height adjustment device according to claim 1, wherein at least one elastic portion is provided on one side or opposite sides of each of the flexible portions, and upper and lower ends of the elastic portion are connected to positions above and below the flexible portion of the auxiliary webbing, respectively.

4. An operation space is formed inside the upper part of the cover, and two abutments are respectively located on both sides below the operation space, The webbing abutment portion at the upper end of the main body is movable up and down in the operation space of the cover, the abutment portion is located below the webbing abutment portion, and when the cover is pulled up, the abutment portion is pressed against the webbing abutment portion of the main body, thereby moving the main body and the slider relative to each other; and 2. The webbing height adjusting device according to claim 1, wherein the main body and the slider are moved relative to each other by operating the cover downward to abut against the slider.

5. Opposing sides of the main body are a first side and a second side, the first side is a side of the main body facing away from the webbing front section, the webbing front section of the main webbing and the auxiliary webbing each enter the first side of the main body and pass through the second side of the main body, One end of the webbing abutment portion adjacent to the movement space has a webbing contact end portion, the slider includes end plates, side plates, and inter-plate connections; the end plates and the side plates are arranged in parallel at a pitch and are located on the first and second sides of the main body, respectively; the inter-plate connection portion is formed between the end plate and the side plate so as to pass through the movement space of the main body, the oblique groove is provided in the inter-plate connection portion and penetrates vertically along an oblique direction from one end of the end plate adjacent to the webbing abutment portion to one end of the side plate adjacent to the webbing abutment portion, the top end of the side plate is higher than the top end of the end plate and the upper end groove opening of the oblique groove; The webbing height adjuster according to claim 4, wherein one end of the end plate adjacent to the oblique groove has a clamping surface that can clamp the auxiliary webbing together with the webbing contact end of the webbing abutting portion.

6. The frame is formed with a perforation and an assembly hole below the perforation; the perforation and the assembly hole are formed so as to cover a part extending from the webbing abutment portion at the upper stage of the frame to an upper end of the perforation, The movement space is formed between the perforation and the webbing abutment portion, 6. The webbing height adjuster according to claim 5, wherein the webbing connection portion is molded to cover a lower section of the frame, and the webbing connection portion is assembled with an assembly hole in the frame to form the main webbing passage.

7. a top of the webbing connection portion has an abutment surface extending to a lower portion of the perforation, and a position regulating post is formed on the abutment surface of the webbing connection portion, protruding toward the frame and having a pitch between it and the abutment surface, 7. The webbing height adjusting device according to claim 6, wherein the elastic member is an arc-shaped elastic sheet that is low in the center and curves upward at both ends, the middle portion of which is located between the abutment surface of the webbing connection portion and the position regulating post, and the both end portions of which abut against the bottom portions of the end plates of the slider.

8. 6. The webbing height adjustment device according to claim 5, wherein the cover includes a back plate located outside the second side of the main body and pressed against a top of the side plate, an outer plate located outside the first side of the main body, and an end plate connected to the top end of the back plate, the operation space is located below the end plate, a webbing penetration space communicating with the movement space from the first side of the main body is formed between the end plate and the outer plate, the end plate is located outside the webbing connection portion of the main body, and an operation pitch is provided between a side surface of the operation space toward which the end plate faces and the webbing abutment portion of the main body.

9. 9. The webbing height adjusting device according to claim 8, wherein the cover has side walls on both sides of the back plate and the end plate, the outer peripheral surfaces of which form non-slip surfaces, and the back plate of the cover has an accommodation groove formed therein into which the side plates of the slider can enter.

10. 9. The webbing height adjustment device according to claim 8, wherein the cover has a bridge portion formed on the outer plate such that a space is formed between the bridge portion and the outer plate, thereby allowing the main webbing to pass through the space between the bridge portion and the outer plate and further pass through a main webbing passage of the main body.

11. A webbing height adjustment device for use in a seat belt system of a vehicle, the webbing height adjustment device being connected to a main webbing extending from a webbing retractor in the seat belt system, comprising: a vibration damping and mitigation assembly to be attached to the vehicle, the vibration damping and mitigation assembly including an auxiliary webbing, a D-ring connected to an upper end of the auxiliary webbing, and an elastic portion connected to a lower end of the auxiliary webbing, the lower ends of the D-ring and the elastic portion being connected to upper and lower positions of the vehicle, respectively, the main webbing passing through the D-ring, portions of the main webbing on both sides located at the D-ring being a rear webbing portion and a front webbing portion, respectively, and the auxiliary webbing being located between the rear webbing portion and the front webbing portion; a webbing height adjuster that is provided below the D-ring and is connected between the front webbing portion of the main webbing and the auxiliary webbing so as to define an adjustable upper position; The webbing height adjuster is a main body including a frame, a webbing abutment portion and a webbing connection portion formed at an upper section and a lower section of the frame, respectively, wherein a movement space through which the auxiliary webbing passes is formed between the webbing abutment portion and the frame, and a main webbing passage through which a front section of the webbing passes is formed between the webbing connection portion and the frame; a slider attached to the moving space of the main body so as to be movable up and down and having an oblique groove through which the auxiliary webbing passes; an elastic member attached between the slider and the main body and providing a restoring force so that the slider can clamp the auxiliary webbing together with the webbing contact portion of the main body; a cover fitted onto the outside of the main body so as to be movable up and down, the cover being operable to relatively displace the slider and the main body to release the clamped state of the auxiliary webbing, and when released, the restoring force of the elastic member allows the slider and the main body to clamp the auxiliary webbing.

12. An operation space is formed inside the upper part of the cover, and two abutments are respectively located on both sides below the operation space, a webbing contact portion at an upper end of the main body that is movable up and down in the operation space of the cover, and the abutment portion is located below the webbing contact portion; The cover, when pulled up, can press the abutting portion against the webbing abutting portion of the main body, thereby moving the main body and the slider relative to each other; and The webbing height adjuster according to claim 11, wherein the cover is operated to move downward and contact the slider, thereby moving the main body and the slider relative to each other.

13. Opposing sides of the main body are a first side and a second side, the first side is a side of the main body facing away from the rear portion of the webbing, the front portion of the webbing of the main webbing and the auxiliary webbing each enter the first side of the main body and pass through the second side of the main body, and one end of the webbing abutting portion adjacent to the movement space has a webbing contact end portion, 13. The webbing height adjustment device according to claim 12, wherein the slider includes an end plate, a side plate, and an inter-plate connection portion, the end plate and the side plate are arranged in parallel at a pitch and are located on a first side and a second side of the main body, the inter-plate connection portion is formed between the end plate and the side plate so as to pass through the movement space of the main body, the diagonal groove is provided at the inter-plate connection portion and penetrates vertically along a diagonal direction from one end of the end plate adjacent to the webbing abutting portion to one end of the side plate adjacent to the webbing abutting portion, a top end of the side plate is higher than the top end of the end plate and an upper groove opening of the diagonal groove, and one end of the end plate adjacent to the diagonal groove has a clamping surface that can clamp the auxiliary webbing together with the webbing contact end of the webbing abutting portion.

14. a perforation and an assembly hole below the perforation are formed in the frame, the perforation and the assembly hole are shaped to cover a part extending from the webbing abutment portion at an upper stage of the frame to an upper end of the perforation, and the movement space is formed between the perforation and the webbing abutment portion, 14. The webbing height adjuster according to claim 13, wherein the webbing connection portion is molded to cover a lower section of the frame, and the webbing connection portion is assembled with an assembly hole in the frame to form the main webbing passage.

15. a top of the webbing connection portion has an abutment surface extending to a lower portion of the perforation, and a position regulating post is formed on the abutment surface of the webbing connection portion, protruding toward the frame and having a pitch between it and the abutment surface, 15. The webbing height adjusting device according to claim 14, wherein the elastic member is an arc-shaped elastic sheet that is low in the center and curves upward at both end portions, the middle portion of which is located between the abutment surface of the webbing connection portion and the position regulating post, and the both end portions of which abut against the bottom portions of the end plates of the slider.

16. 14. The webbing height adjustment device according to claim 13, wherein the cover includes a back plate located outside the second side of the main body and pressed against a top of the side plate, an outer plate located outside the first side of the main body, and an end plate connected to the top end of the back plate, the operation space is located below the end plate, a webbing penetration space communicating with the movement space from the first side of the main body is formed between the end plate and the outer plate, the end plate is located outside the webbing connection portion of the main body, and an operation pitch is provided between a side surface of the operation space toward which the end plate faces and the webbing abutment portion of the main body.

17. 17. The webbing height adjusting device according to claim 16, wherein the cover has side walls on both sides of the back plate and the end plate, the outer peripheral surfaces of which form non-slip surfaces, and the back plate of the cover has accommodation grooves formed therein into which the side plates of the slider can enter.

18. 17. The webbing height adjustment device according to claim 16, wherein the cover has a bridge portion formed on the outer plate such that a space is formed between the bridge portion and the outer plate, thereby allowing the main webbing to pass through the space between the bridge portion and the outer plate and further pass through a main webbing passage of the main body.

19. A webbing height adjustment device for use in a seat belt system of a vehicle, the webbing height adjustment device being connected to a main webbing extending from a webbing retractor in the seat belt system, comprising: a vibration damping and mitigation assembly to be attached to the vehicle, the vibration damping and mitigation assembly including an auxiliary webbing, two elastic portions connected to an upper end and a lower end of the auxiliary webbing, respectively, and a D-ring provided at the upper end of the upper elastic portion, the D-ring and the lower end of the lower elastic portion being connected to upper and lower positions of the vehicle, respectively, the main webbing passing through the D-ring, both sides of the main webbing located at the D-ring being a rear webbing portion and a front webbing portion, respectively, and the auxiliary webbing being located between the rear webbing portion and the front webbing portion; a webbing height adjuster that is provided below the D-ring and is connected between the front webbing portion of the main webbing and the auxiliary webbing so as to define an adjustable upper position; The webbing height adjuster is a main body including a frame, a webbing abutment portion and a webbing connection portion formed at an upper section and a lower section of the frame, respectively, wherein a movement space through which the auxiliary webbing passes is formed between the webbing abutment portion and the frame, and a main webbing passage through which a front section of the webbing passes is formed between the webbing connection portion and the frame; a slider attached to the moving space of the main body so as to be movable up and down and having an oblique groove through which the auxiliary webbing passes; an elastic member attached between the slider and the main body and providing a restoring force so that the slider can clamp the auxiliary webbing together with the webbing contact portion of the main body; a cover fitted onto the outside of the main body so as to be movable up and down, the cover being operable to relatively displace the slider and the main body to release the clamped state of the auxiliary webbing, and when released, the restoring force of the elastic member allows the slider and the main body to clamp the auxiliary webbing.

20. An operation space is formed inside the upper part of the cover, and two abutments are respectively located on both sides below the operation space, a webbing contact portion at an upper end of the main body that is movable up and down in the operation space of the cover, and the abutment portion is located below the webbing contact portion; The cover, when pulled up, can press the abutting portion against the webbing abutting portion of the main body, thereby moving the main body and the slider relative to each other; and The webbing height adjuster according to claim 19, wherein the cover is operated to move downward and contact the slider, thereby moving the main body and the slider relative to each other.

21. Opposing sides of the main body are a first side and a second side, the first side is a side of the main body facing away from the rear portion of the webbing, the front portion of the webbing of the main webbing and the auxiliary webbing each enter the first side of the main body and pass through the second side of the main body, and one end of the webbing abutting portion adjacent to the movement space has a webbing contact end portion, 21. The webbing height adjustment device according to claim 20, wherein the slider includes end plates, side plates, and inter-plate connection portions, the end plates and the side plates are arranged in parallel at a pitch and are located on a first side and a second side of the main body, the inter-plate connection portion is formed between the end plates and the side plates so as to pass through the movement space of the main body, the diagonal groove is provided at the inter-plate connection portion and penetrates vertically along a diagonal direction from one end of the end plate adjacent to the webbing abutting portion to one end of the side plate adjacent to the webbing abutting portion, a top end of the side plate is higher than the top end of the end plate and an upper groove opening of the diagonal groove, and one end of the end plate adjacent to the diagonal groove has a clamping surface that can clamp the auxiliary webbing together with the webbing contact end of the webbing abutting portion.

22. a perforation and an assembly hole below the perforation are formed in the frame, the perforation and the assembly hole are shaped to cover a part extending from the webbing abutment portion at an upper stage of the frame to an upper end of the perforation, and the movement space is formed between the perforation and the webbing abutment portion, 22. The webbing height adjuster of claim 21, wherein the webbing connection portion is molded to cover a lower section of the frame, and the webbing connection portion assembles with an assembly hole in the frame to form the main webbing passage.

23. a top of the webbing connection portion has an abutment surface extending to a lower portion of the perforation, and a position regulating post is formed on the abutment surface of the webbing connection portion, protruding toward the frame and having a pitch between it and the abutment surface, 23. The webbing height adjusting device according to claim 22, wherein the elastic member is an arc-shaped elastic sheet that is low in the center and curves upward at both end portions, the middle portion of which is located between the abutment surface of the webbing connection portion and the position regulating post, and the both end portions of which abut against the bottom portions of the end plates of the slider.

24. 22. The webbing height adjustment device according to claim 21, wherein the cover includes a back plate located outside the second side of the main body and pressed against a top of the side plate, an outer plate located outside the first side of the main body, and an end plate connected to the top end of the back plate, the operation space is located below the end plate, a webbing penetration space communicating with the movement space from the first side of the main body is formed between the end plate and the outer plate, the end plate is located outside the webbing connection portion of the main body, and there is an operation pitch between a side surface of the operation space toward which the end plate faces and the webbing abutment portion of the main body.

25. 25. The webbing height adjusting device according to claim 24, wherein the cover has side walls on both sides of the back plate and the end plate, the outer peripheral surfaces of which form non-slip surfaces, and the back plate of the cover has an accommodation groove formed therein into which the side plate of the slider can enter.

26. 25. The webbing height adjustment device according to claim 24, wherein the cover has a bridge portion formed on the outer plate such that a space is formed between the bridge portion and the outer plate, thereby allowing the main webbing to pass through the space between the bridge portion and the outer plate and further pass through a main webbing passage of the main body.

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