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 a main webbing in a seat belt system. [Background technology]

[0002] Conventionally, a three-point seat belt system for providing safety protection to occupants such as a driver or passengers is applied to the seats of vehicles such as automobiles, trucks, or utility vehicles. In the main configuration, a webbing winder of the three-point seat belt system is attached to one side of the vehicle body near the seat, and the webbing extending from the webbing winder is extended upward to pass through a D-ring above a pillar on one side of the seat, and then the end of the webbing is separated from the webbing winder and fixed below the pillar. When using the webbing, the webbing is passed diagonally downward from the upper front part of the shoulder / chest of the occupant on the seat, and the connecting tongue of the webbing is inserted into the seat buckle on the other side of the seat. In addition, the webbing passes through another part of the connecting tongue and extends toward one side of the seat near the webbing winder, so that the webbing is laid horizontally in front of the abdomen of the occupant on the seat, forming a three-point seat belt system, and the webbing of this seat belt system can restrain the occupant's body on the seat in the vehicle.

[0003] In the conventional three-point seat belt system of a vehicle, the shoulder part of the webbing, which presses against the shoulders and chest of the occupant in an oblique direction, must restrain the occupant with a considerable tension, which causes discomfort to the occupant in the seat. Furthermore, if the height of the upper position of the webbing near the occupant's shoulders cannot be adjusted when the occupant's body is tightly fastened by the webbing, the neck of the occupant in the seat may be injured by the webbing in an emergency. Therefore, a webbing height adjuster that is attached to the D-ring at the upper level of the pillar on one side of the seat is required so that the occupant in the seat can adjust the upper position of the webbing according to his or her body type, and the provision of this adjuster ensures the safety of the seat belt system in use. In addition, in modern times where the safety of occupants such as the driver and passengers in a vehicle is increasingly important, the webbing height adjuster of the seat belt system has already become an indispensable safety device.

[0004] An example of the structure of a webbing height adjuster for a conventional seat belt system is the webbing height adjuster (WEBBING ADJUSTENT DEVICE) of US10654442. This structure includes a D-ring member attached to one side of the vehicle seat above, a movable frame, a movable member movably attached to the movable frame, and an outer cover fitted to the outside of the movable frame, and the webbing connected to a webbing winder in the seat belt system passes through the movable frame or a connecting member connected thereto, and the D-ring in that order, and further passes a webbing shoulder portion of the webbing between the movable frame and the movable member, thereby tightening and locking the webbing by causing relative movement between the movable frame and the movable member by the tension of the webbing so that a height-adjustable upper position can be provided for an occupant on the seat. When the webbing adjuster is not in use, the outer cover fitted to the outside of the movable frame can be hooked onto the D-ring to put it into a stored state.

[0005] The webbing adjustment device of a conventional seat belt system is connected between the rear part of the webbing (i.e., the part of the webbing between the webbing take-up device and the guide ring member) and the front part of the webbing that is hung diagonally around the shoulders and chest of an occupant on the seat, and therefore can adjust the upper position of the webbing, but does not have an auxiliary vibration damping function, and the webbing height adjuster clamps and locks the webbing in response to the tension of the webbing, so 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 the 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 conventional vehicle seat belt systems, in order to improve safety in use, in addition to a structure in which the webbing of an existing webbing reel is used as the main webbing, a webbing height adjuster is provided to adjust the height of the upper position of the main webbing, and 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 them, in the "WEB POSITION ADJUSTMENT AND ATTENUATION APPARATUS" disclosed in the above-mentioned 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 on the upper part of 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, a main webbing connected to a webbing take-up passes through a D-ring, and can restrain the torso of an occupant on the seat, and a vibration damping mitigation function is provided by the elastic member of the auxiliary vibration damping assembly. However, in 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 a limited range of vertical elastic displacement 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 Document 1 and Patent Document 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 can be adjusted and positioned in the vertical direction, thereby forming a step-type height adjustment mechanism. In the seat belt system of such a vehicle, the main webbing connected to the webbing reel passes through the D-ring and the connection base, thereby utilizing the connection base 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 System and Related System and Method," includes a rail that can be attached to a pillar on one side of a 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, and by adjusting the height position of the D-ring on the rail with the adjustment stopper, 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 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 providing a vibration damping buffering effect.

[0011] In the above description, the webbing height adjuster disclosed in the application for "Height adjuster with anti-pinch function for use in seat belt system" in Patent Document 4 and the other application for "Height adjuster with anti-pinch function for use in seat belt system" in 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 buffering 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 of the upper position is adjustable. The main webbing that has passed 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 belt-shaped body 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. Pat. No. 9,499,121 [Patent Document 2] U.S. Pat. No. 9,738,248 [Patent Document 3] U.S. Pat. No. 9,809,193 [Patent Document 4] U.S. Pat. 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] The present invention aims to provide a webbing height adjustment device to solve the problem of operational inconvenience when adjusting the height position of the upper position using a webbing height adjustment 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 adjustment device, which is used in a seat belt system of a vehicle and is connected to a main webbing extending from a webbing take-up 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 member being located on the sides of the flexible portion, the upper and lower ends of the elastic member 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 webbing rear portion and a webbing front portion, respectively, and the auxiliary webbing being located between the webbing rear portion and the webbing front portion; a webbing height adjuster provided below the D-ring and connected between the webbing front portion of the main webbing and the auxiliary webbing 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, a moving 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 that is attached to the moving space of the main body so as to be movable up and down and has 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 abutment portion of the main body; a cover that is fitted onto the outside of the main body so as to be vertically movable, the slider and the main body can be displaced relative to each other by operating the cover so as to release the clamped state of the auxiliary webbing, and when released, the slider and the main body can clamp the auxiliary webbing due to a restoring force of the elastic member. 2. The webbing height adjusting device according to claim 1, wherein the auxiliary webbing has the flexible portion located in a lower stage thereof, at least one of the elastic portions is provided on one side or on opposite sides of the flexible portion, and upper and lower ends of the elastic portions are connected to positions above and below the flexible portion of the auxiliary webbing, respectively. In the webbing height adjustment device as described above, the auxiliary webbing has two flexible portions located at the upper and lower stages, respectively, and at least one elastic portion is provided on one side or opposing 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 portions in the auxiliary webbing, respectively.

[0016] In order to achieve the above object, the present invention proposes another webbing height adjustment device as described below, that is, a webbing height adjustment device used in a seat belt system of a vehicle and connected to a main webbing extending from a webbing winder 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 part connected to a lower end of the auxiliary webbing, the D-ring and lower ends of the elastic part being connected to upper and lower positions of the vehicle, respectively, the main webbing passes through the D-ring, both side portions of the main webbing located at the D-ring are a webbing rear portion and a webbing front portion, respectively, and the auxiliary webbing is located between the webbing rear portion and the webbing front portion; a webbing height adjuster provided below the D-ring and connected between the webbing front portion of the main webbing and the auxiliary webbing 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 on an upper section and a lower section of the frame, a moving 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 that is attached to the moving space of the main body so as to be movable up and down and has 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 abutment portion of the main body; a cover that is fitted onto the outside of the main body so as to be vertically movable, the cover being capable of displacing the slider and the main body relatively to each other to release the clamped state of the auxiliary webbing by operating the cover, 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 another webbing height adjustment device as described below, that is, a webbing height adjustment device used in a seat belt system of a vehicle and connected to a main webbing extending from a webbing winder 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 parts respectively connected to an upper end and a lower end of the auxiliary webbing, and a D-ring provided at an upper end of the elastic part located at an upper part, the D-ring and the lower end of the elastic part located at a lower part are respectively connected to upper and lower positions of the vehicle, the main webbing passes through the D-ring, both side portions of the main webbing located at the D-ring are a webbing rear portion and a webbing front portion, respectively, and the auxiliary webbing is located between the webbing rear portion and the webbing front portion; a webbing height adjuster provided below the D-ring and connected between the webbing front portion of the main webbing and the auxiliary webbing 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 on an upper section and a lower section of the frame, a moving 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 that is attached to the moving space of the main body so as to be movable up and down and has 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 abutment portion of the main body; a cover that is fitted onto the outside of the main body so as to be vertically movable, the cover being capable of displacing the slider and the main body relatively to each other to release the clamped state of the auxiliary webbing by operating the cover, 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. 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 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 the cover, when pulled up, can press the abutment portion against the webbing abutment portion of the main body to move the main body and the slider relatively, and the cover is operated to abut against the slider downward, thereby moving the main body and the slider relatively. In the webbing height adjustment device as described above, both 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 stage portion of the webbing, the front stage 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 abutment portion adjacent to the movement space has a webbing contact end portion, 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 with each other 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 in the inter-plate connection portion and penetrates vertically along a diagonal 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, a top end of the side plate is higher than the top end of the end plate and an upper end groove mouth 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 a webbing contact end portion of the webbing abutment 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 so as 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, The webbing connection portion is molded to cover a lower portion 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, a top of the webbing connection portion has an abutment surface extending to a lower portion of the perforation, and a position regulating pillar is formed on the abutment surface of the webbing connection portion, protruding toward the frame and having a pitch between the abutment surface and the position regulating pillar, The elastic member is an arc-shaped elastic sheet that is low in the center and has both ends that curve upward, with its middle portion positioned between the abutment surface of the webbing connection portion and the position regulating post, and both end portions abutting against the bottom portions of the end plates 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 has 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 an accommodation groove is formed in the back plate of the cover 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 outer plate and the bridge portion, allowing the main webbing to pass through the space between the bridge portion and the outer plate and further 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 obtained. 1. Provides height adjustment function for the upper position of the main webbing. According to the webbing height adjustment device of the present invention, a 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, thereby allowing an occupant in a vehicle seat to 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, respectively, the main webbing passes through the D-ring located at the upper part, 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 provides 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 in the webbing height adjustment 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 when the action of the restoring force on the slider is continued by the elastic member, 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 webbing 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 in the webbing connection portion and passes through the other side of the main body, and then the webbing of the main webbing is automatically locked. The front section redirects 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 take-up device on the main webbing, thereby increasing the tension of the assistant webbing via the webbing height adjuster. Therefore, when the webbing height adjuster autonomously clamps and locks the assistant webbing, as the tension of the assistant webbing and main webbing increases, the clamping and locking force between the main body of the webbing height adjuster and the slider increases, providing a better and stronger positioning effect. 4. Easy to operate In the webbing height adjustment device of the present invention, since the webbing height adjuster is connected between the main webbing and the assistant webbing, when the height position of the webbing height adjuster is to be adjusted after the upper position is formed above one side of the seat occupant, the seat occupant can directly and easily release the clamping action on the assistant webbing by gripping the cover and pushing down the slider or applying force to the main body so that the slider or main body is relatively displaced against the restoring force of the elastic member, and the height position can be adjusted by sliding the webbing height adjuster along the main webbing and assistant webbing. Therefore, the present invention can be applied to a seat belt system, and good operating convenience can be provided to the seat occupant. 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 assistant webbing, and the elastically acted slider clamps the assistant 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 seated on the seat to freely adjust the height position. 6. Minimize the possibility of the webbing height adjuster changing position even if a seat occupant is subjected to force. As described above, in the webbing height adjuster connected between the main webbing and the assistant webbing, the slider subjected to an elastic action clamps the assistant webbing together with the webbing abutment portion of the main body, the webbing height adjuster autonomously locks and positions the assistant webbing, and the main webbing connected to a webbing take-up 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 an occupant on the seat accurately connects the main webbing, the webbing height adjuster receives the tension action 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, and 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 that the position of the webbing height adjuster will change. 7. There is no need to readjust the position of the webbing height adjuster when the same occupant sits on the seat. As described above, in the 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 take-up in the seat belt system freely passes 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 wound up by the webbing take-up 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 adjustment device of the present invention, a bridge structure formed on the outer plate of the cover in the webbing height adjuster enables the main webbing to pass between the bridge portion of the cover and the outer plate and then pass through the main webbing passage of the main body, so that the bridge portion assists in guiding the main webbing in a direction approaching the webbing height adjuster, thereby smoothing movement of the main webbing. [Brief description 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; [Diagram 2] 11 is a reference view showing a state in which a webbing height adjusting device according to another embodiment of the present invention is applied to a seat belt system; [Figure 3A] 4 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 adjustment device of the present invention; FIG. [Figure 3B] 4 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 adjustment device of the present invention; FIG. [Figure 3C]4 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 adjustment device of the present invention; FIG. [Figure 3D] 4 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 adjustment device of the present invention; FIG. [Figure 4] FIG. 11 is a reference diagram showing a state in which a webbing height adjusting device according to another embodiment of the present invention is applied to a seat belt system. [Diagram 5] FIG. 11 is a reference diagram showing a state in which a webbing height adjusting device according to another embodiment of the present invention is applied to a seat belt system. [Figure 6] FIG. 6 is an external perspective view 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] 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. FIG. [Figure 12] 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 to 10, as viewed from another angle. FIG. [Figure 13] FIG. 13 is a perspective view of a frame in the main body shown in FIGS. [Figure 14] 13 is a side cross-sectional view of the webbing height adjuster shown in FIGS. 6 to 12. FIG. [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 inserted through a main webbing and an 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 inserted through a main webbing and an auxiliary webbing. FIG. [Figure 18] FIG. 11 is an external perspective view of another embodiment of a webbing height adjuster in a 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 inserted through a main webbing and an auxiliary webbing. FIG. [Figure 21] 19 is a side cross-sectional view showing a clamping state after the webbing height adjuster shown in FIG. 18 is inserted through the main webbing and the auxiliary webbing. FIG. [Figure 22] FIG. 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; [Figure 23] 23 is an operation schematic view from another viewing angle when the height position of the webbing height adjuster shown in FIG. 22 is adjusted upward. FIG. [Figure 24A] FIG. 24 is a schematic operation diagram (1) of a side cross section taken along line 24A-24A when the height position of the webbing height adjuster shown in FIG. 23 is adjusted upward. [Figure 24B] FIG. 24B is a second schematic operation diagram of a side cross section taken along line 24B-24B when the height position of the webbing height adjuster shown in FIG. 23 is adjusted upward. [Diagram 25] 23 is a schematic operation diagram from another viewing angle when the height position of the webbing height adjuster shown in FIG. 22 is adjusted downward. FIG. [Figure 26] 26 is a schematic operation diagram of a side cross section taken along line 26-26 when the height position of the webbing height adjuster shown in FIG. 25 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. [Figure 28] FIG. 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. [Figure 29] FIG. 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. [Diagram 30] FIG. 5 is a reference diagram of the webbing height adjuster when no occupant is present on the seat shown in FIGS. 1 and 4. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] 1, 2, 4, and 5 are diagrams showing different embodiments when the webbing height adjustment device of the present invention is applied to a seat belt system 1 of a vehicle seat, the seat belt system 1 includes a webbing reel 1B located on the side of the vehicle seat closer to the pillar and a main webbing 1A extending from the webbing reel 1B, the main webbing 1A is a flexible member that cannot be elastically deformed, and its end is fixed to a position below the pillar away from the webbing reel 1B, the webbing reel 1B automatically reels the main webbing 1A, and a connection tongue 1C is provided on the main webbing 1A, and the connection tongue 1C 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 since 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. Specific structures of the vibration damping buffer assembly 2 and the webbing height adjuster 3 will be described below.

[0023] As shown in Figures 1, 2, 4 and 5, the upper and lower ends of the vibration damping buffer assembly 2 are fixed to the vehicle and located on the side of the seat close to the pillar, and in several embodiments shown in these figures, the upper and lower ends of the vibration damping buffer assembly 2 are fixed to the upper and lower positions of the pillar on the side of the seat of the vehicle, but are not limited thereto. 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, 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 performance, 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) and has sufficient strength to support the main webbing 1A, the assistant webbing 2A and the elastic part 2B. Hereinafter, the embodiments shown in Figs. 1, 2, 4 and 5 will be described in order.

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

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

[0026] In the vibration damping buffer assembly 2, as in the embodiment shown in FIG. 3A, in addition to a configuration in which an elastic portion 2B is provided on each of opposing sides of the flexible portion 21A in the assistant webbing 2A, as shown in FIG. 3A, the vibration damping buffer assembly 2 may be configured so that an elastic portion 2B is provided on one side of the flexible portion 21A in the assistant webbing 2A, as shown in FIG. 3C, the vibration damping buffer assembly 2 may be configured so that an elastic portion 2B is provided on one side of the flexible portion 21A in the assistant 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] In the embodiment shown in Fig. 4, the vibration damping buffer assembly 2 includes an assistant webbing 2A, an elastic part 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 part 2B is connected to the lower end of the assistant webbing 2A, and is connected to the upper stage of the pillar on the side of the seat via the D-ring 2C, the lower end of the elastic part 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 is inserted through the D-ring 2C. As a result, when the assistant webbing 2A receives a force, the elastic part 2B is elastically deformed and indirectly pulled, and a part of the acting force on the assistant webbing 2A is counteracted, so that the vibration damping buffer assembly 2 exhibits vibration damping buffering performance. The elastic part 2B and the assistant webbing 2A described above may be connected by sewing means, or a connecting ring connected to the elastic part 2B may be connected to the assistant webbing 2.

[0028] In the embodiment shown in Fig. 5, the vibration damping buffer assembly 2 includes an assistant webbing 2A, two elastic parts 2B and a D-ring 2C connected to the upper and lower ends of the assistant webbing 2A, and the upper end of the elastic part 2B located at the upper part is connected to the D-ring 2C and connected to the upper position of the pillar on the side of the seat via the D-ring 2C, and the lower end of the elastic part 2B located at the lower part 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 part 2B is indirectly pulled and elastically deformed, and a part of the acting force on the assistant webbing 2A is cancelled out, thereby exerting the vibration damping buffering performance of the vibration damping buffer assembly 2. The two elastic parts 2B and the assistant webbing 2A described above may be connected by sewing means or via a connecting ring.

[0029] As shown in Figures 1, 2, 4 and 5, in each of the above-mentioned 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, and a portion of the main webbing 1A between the webbing reel 1B and the D-ring 2C is a webbing rear stage portion 11A, and a portion of the main webbing 1A on the other side that has passed through the D-ring 2C is a webbing front stage portion 12A, which is a portion for restraining the torso of an occupant on the seat in an oblique direction, and an auxiliary webbing 2A of the vibration damping buffer assembly 2 is located between the webbing rear stage portion 11A and the webbing front stage 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 webbing front portion 12A of the main webbing 1A and the auxiliary webbing 2A so as to configure 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, and the opposing 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. In addition, the frame 31 is formed with a perforation 311 and an assembly hole 312 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, and the width of the perforation base 3111 is wider than the width of the extended hole portion 3112.

[0032] As shown in Figs. 9 to 12 and 14, the webbing abutment portion 32 is formed of a plastic material and covers the upper part of the frame 31. A movement space 321, which is a space through which the assistant webbing 2A passes, is formed between the webbing abutment portion 32 and the perforation 311 of the frame 31, and the webbing abutment portion 32 is a portion with which the assistant webbing 2A abuts. The webbing abutment portion 32 is preferably formed of a plastic material having excellent abrasion resistance. In this embodiment, the lower end of the webbing abutment portion 32 partially enters the upper end of the perforation base 3111, the space from the bottom surface of the webbing abutment 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 abutment portion 32 adjacent to the movement space 321 is a webbing contact end portion 322 as a portion for contacting the assistant webbing 2A.

[0033] As shown in Figs. 9 to 12 and 14, the webbing connection part 33 is molded from a plastic material and covers the lower part of the frame 31. The webbing connection part 33 is joined to the lower end of the assembly hole 312 in the frame 31 to form a main webbing passage 331 through which the main webbing 1A passes, and the webbing connection part 33 is a portion with which the main webbing 1A abuts. The webbing connection part 33 is preferably molded from a plastic material having excellent abrasion resistance. Furthermore, both the upper wall surface and the lower wall surface of the webbing connection part 33 in the main webbing passage 331 have arc-shaped surfaces, so that the main webbing 1A can smoothly pass through the main webbing as shown in Figs. 16 and 17, and the main webbing 1A can abut against the upper wall surface or the lower wall surface of the main webbing passage 331 to be redirected in another direction.

[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 extending 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 as to be able to 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 connection parts 43, the end plate 41 and the side plate 42 are arranged in parallel with each other at a pitch, the two inter-plate connection parts 43 are integrally molded between the end plate 41 and the side plate 42, and the diagonal groove 44 is provided in the two inter-plate connection parts 43 and penetrates the side plate 42 in an oblique direction in the up and down direction toward the bottom end of the side plate 42. When the slider 40 is attached to the moving space 321 of the main body 30, the end plate 41 and the side plate 42 are respectively located on the first side 301 and the second side 302 of the main body 30, and the two inter-plate connection parts 43 are located in the moving space 321, and the top part of the end plate 41 has a clamping surface 411 that can clamp the assistant webbing 2A together with the webbing contact end part 322 at the bottom end of the webbing abutting part 32 adjacent to the moving 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 end groove mouth of the diagonal groove 44, and an attachment groove 412 extending upward is further formed in the bottom part of the end plate 41. In the embodiment shown in Figures 10 and 12, the webbing abutment part 32 of the main body 30 has a sliding groove 323 formed in its second side 302, and the side plate 42 of the slider 40 is inserted into the sliding groove 323 and can move up and down.

[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 accumulate restoring force energy.

[0039] The elastic member 50 may be selected as 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 Figs. 9 to 12 and 14, in this embodiment, an arc-shaped elastic sheet 51 is adopted as the elastic member 50, the center of which is low and both ends of which are curved upward, and the middle part 511 of the elastic sheet 51 abuts against the abutment surface 332 of the webbing connection part 33, and the position regulating post 333 regulates the position above the middle part 511 of the elastic sheet 51, and both ends of the elastic sheet 51 abut against the bottom of the end plate 41 of the slider 40, and extend upward to enter the mounting groove 412 at the bottom of the end plate 41, and both ends of the elastic sheet 51 abut against both sides of the top wall of the mounting groove 412. As a result, the elastic member 50 can provide a uniform restoring force to both sides of the slider 40, so that the slider 40 and the main body 30 can stably move relative to each other.

[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 to adjust the height of the upper position by manipulating 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 fitting a cover base 60A and a cover lid 60B together and fixed in place, and the inner surfaces of the cover base 60A and the cover lid 60B are provided with a plurality of ribs 601A, 601B, respectively, for enhancing 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 section of the cover 60, located on both sides of the operational space 600 and below the operational space 600, and the webbing abutment portion 32 at the upper end of the main body 30 is movable up and down in the operational space 600 of the cover 60, and the abutment portion 60C is located below the webbing abutment portion 32, and the cover 60, when pulled up, can press the abutment portion 60C against the webbing abutment portion 32 of the main body 30, thereby moving the main body 30 and the slider 40 relative to each other, and the bottom of the cover 60 can be brought into contact downward with the side plate 42 of the slider 40, thereby moving the main body 30 and the slider 40 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 disposed on the webbing abutment portion of the main body 30. 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 to be 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, through a 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, in a state in which the slider 40 and the main body 30 relatively hold the assistant webbing 2A, the cover 60 naturally descends due to gravity and abuts against the top of the side plate 42 of the slider 40 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 abutment portion 32 of the main body 30. By operating the cover 60 to abut downward against the slider 40, the slider 40 and the main body 30 move relatively by the distance of the operating pitch S, and furthermore, the bottom surface of the end portion 63 of the cover 60 comes into contact with the top of the webbing abutment portion 32 of the main body 30, thereby limiting the distance by which the slider 40 and the main body 30 move relatively, so that it is possible to prevent the elastic member 50 from being deformed by an excessive acting force, and thus an appropriate elastic action by the elastic member 50 is maintained between the slider 40 and the main body 30. In addition, although the webbing abutment portion 32 at the upper end of the main body 30 can move up and down in the operational space 600 of the cover 60, the movement distance is limited by the lower part of the abutment portion 60C of the webbing abutment portion 32, so that 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 a side wall 65 whose outer circumferential surface forms an anti-slip surface 651 on both sides, thereby allowing an occupant on the seat to grasp 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 further has an outer plate 62 on which a bridge 66 having a space therebetween is formed, thereby enabling the main webbing 1A to pass through the space between the bridge 66 and the outer plate 62 and further 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 assistant webbing 2A of the assistant webbing assembly 2 of the webbing height adjusting device according to the present invention is located between the webbing rear portion 11A and the webbing front portion 12A of the main webbing 1A, and the webbing height adjuster 3 is attached below the D-ring 1C of the assistant webbing assembly 2 and connected between the webbing front portion 12A of the main webbing 1A and the assistant webbing 2A, so that the webbing height adjuster 3 is placed horizontally by the action of gravity and an 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 his or her body shape, and the webbing height adjuster 3 is connected between the assistant webbing 2A and the main webbing 1A, providing 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 through the moving space 321 of the main body 30 and the oblique groove 44 of the slider 40 from above one side of the cover 60, 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 that 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 position of the webbing height adjuster 3 clamped by the auxiliary webbing 2A can be maintained by the elastic action of the elastic member 50 on the slider 40. On the other hand, the webbing front portion 12A of the main webbing 1A after passing through the D-ring 2C of the assistant webbing assembly 2 extends downward from above one side of the cover 60, above the first side 301 of the main body 30, through the outside of the outer plate 62, through the main webbing passage 331 in the webbing connection portion 33 of the main body 30, and 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 assistant webbing 2A, thereby forming the upper position.

[0049] As described above, the webbing height adjuster 3 is fixed to the assistant webbing 2A and is also fixed to a predetermined location in the assistant 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 seat occupant, thereby reducing discomfort felt by the seat occupant restrained by the main webbing 1A.

[0050] 1, 4, 22, 23, 24A, and 24B, in the 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 assistant webbing 2A, the occupant on the seat just needs to grip the cover 60 and press the main body 30 upward. That is, by pressing the webbing abutment portion 32 of the main body 30 upward with the abutment 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 assistant webbing 2A. This allows the height of the webbing height adjuster 3 to be adjusted upward along the assistant 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 assistant 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 terms of operation.

[0051] 1, 4, 22, 25 and 26, when adjusting the height position of the webbing height adjuster 3 downward, an occupant on the seat grasps the cover 60 and presses the slider 40 downward, and the cover 60 presses 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 assistant webbing 2A, thereby adjusting the height position downward. When the cover 60 is released after adjusting to an appropriate height position, the slider 40 and the main body 30 are pressed against each other by the elastic action of the elastic member 50, and the assistant webbing 2A returns to a fastened state, so that the webbing height adjuster 3 can be fixed to the height position of the assistant webbing 2A and the webbing front portion 12A of the main webbing 1A.

[0052] 1, 4, 22, and 27 to 29, the height position of the webbing height adjuster 3 may be adjusted by other operation methods in the present invention. For example, when the webbing height adjuster 3 needs to be adjusted up or down, the occupant on the seat can grip 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 smoothly pass between the slider 40 and the main body 30, so that the occupant on the seat can grip 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 the webbing height adjuster 3 is adjusted 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 against each other, returning the assistant webbing 2A to a locked state, so that the height position of the webbing height adjuster 3 can be maintained.

[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, so that the slider 40 and the webbing abutment portion 32 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 in the webbing connection portion 33 from the first side 301 of the main body 30, and after passing through the second side 302 of the main body 30, the webbing front portion 12A of the main webbing 1A bypasses the webbing connection portion 33 of the main body 30 and redirects 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 of the webbing winder 1B on the main webbing 1A, and accordingly, Since the webbing front portion 12A of the main webbing 1A, which restrains the torso of the occupant on the seat, increases the tension of the assistant webbing 2A via the webbing height adjuster 3, on the premise that the webbing height adjuster 3 voluntarily clamps and locks the assistant webbing 2A, as the tension of the assistant webbing 2A increases, the clamping and locking force of the main body 30 and the slider 40 of the webbing height adjuster 3 on the assistant webbing 2A increases, so that a better positioning effect can be obtained 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] As shown in Fig. 30, when there is no occupant on a vehicle seat, the main webbing 1A in an unused seat belt system passes directly through the main webbing passage 331 of the webbing height adjuster 3 and naturally passes through the webbing height adjuster 3 and the D-ring 2C due to the automatic winding action of the webbing winder 1B, and is wound up, thereby shortening the length of the in-webbing 1A. Meanwhile, the webbing height adjuster 3 connected between the main webbing 1A and the assistant webbing 2A presses against the slider 40 and the webbing abutment portion 32 by the elastic member 50 so that the slider 40 and the main body 30 hold the assistant webbing 2A between them until the assistant webbing 2A is in the locked state, and therefore the height position of the webbing height adjuster 3 can be maintained. 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 will be pulled and restrain 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, so 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 winder 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 Frame 311 Perforation 3111 Perforated Base 3112 Extension hole part 312 Assembly hole 32 Webbing contact part 321 Moving Space 322 Webbing contact end 323 Slide 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 joint 44 Diagonal groove 50 Elastic member 51 Arc-shaped elastic sheet 511 Middle section 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 plate 63 End plate 65 Side wall 651 Anti-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 take-up in the seat belt system, the webbing height adjustment device 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 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 member being located on the sides of the flexible portion, the upper and lower ends of the elastic member 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 webbing rear portion and a webbing front portion, and the auxiliary webbing being located between the webbing rear portion and the webbing front portion; a webbing height adjuster provided below the D-ring and connected between the webbing front 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 on an upper section and a lower section of the frame, a moving 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 that is attached to the moving space of the main body so as to be movable up and down and has 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 abutment portion of the main body; a cover that is fitted onto the outside of the main body so as to be vertically movable, the cover being capable of displacing the slider and the main body relatively to each other to release the clamped state of the auxiliary webbing by operating the cover, 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.

2. The auxiliary webbing has the flexible portion located at a lower stage thereof, 2. The webbing height adjustment device according to claim 1, wherein at least one of the elastic portions 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 of the flexible portions located at the upper and lower stages thereof, 2. The webbing height adjustment device according to claim 1, wherein at least one of the elastic portions is provided on one side or opposing 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 vertically movable in the operation space of the cover, the abutment portion is located below the webbing abutment portion, and the cover, when pulled up, presses the abutment portion against the webbing abutment portion of the main body to move the main body and the slider relative to each other; and 2. The webbing height adjusting device according to claim 1, wherein the cover is moved downwardly and into contact with the slider, thereby moving the main body and the slider relatively.

5. The 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 an end plate, a side plate, and an inter-plate connection; The end plate and the side plate are arranged in parallel with each other at a pitch and are located on a first side and a second side 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 mouth of the oblique groove, The webbing height adjusting device according to claim 4 , wherein one end of the end plate adjacent to the oblique groove has a clamping surface capable of clamping the auxiliary webbing together with the webbing contact end of the webbing abutting portion.

6. The frame is formed with a hole and an assembly hole below the hole; 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 adjustment device of 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 of the frame to form the main webbing passage.

7. a top portion of the webbing connecting portion has an abutment surface extending to a lower portion of the perforation, and a position regulating pillar is formed on the abutment surface of the webbing connecting portion, the position regulating pillar protruding toward the frame and having a pitch between the abutment surface and the abutment surface, 7. The webbing height adjustment 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, a middle portion of which is positioned between the abutment surface of the webbing connection portion and the position regulating post, and both end portions of which abut against bottom portions of the end plates of the slider.

8. 5. The webbing height adjustment device according to claim 4, 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. The webbing height adjustment 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 anti-slip surfaces, and the back plate of the cover is formed with an accommodation groove into which the side plate 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 outer plate and the bridge portion, 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 take-up in the seat belt system, the webbing height adjustment device 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 part connected to a lower end of the auxiliary webbing, the lower ends of the D-ring and the elastic part being connected to upper and lower positions of the vehicle, respectively, the main webbing passing through the D-ring, both side portions of the main webbing located at the D-ring being a webbing rear portion and a webbing front portion, respectively, and the auxiliary webbing being located between the webbing rear portion and the webbing front portion; a webbing height adjuster provided below the D-ring and connected between the webbing front 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 on an upper section and a lower section of the frame, a moving 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 that is attached to the moving space of the main body so as to be movable up and down and has 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 abutment portion of the main body; a cover that is fitted onto the outside of the main body so as to be vertically movable, the cover being capable of displacing the slider and the main body relatively to each other to release the clamped state of the auxiliary webbing by operating the cover, 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.

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, The webbing abutment portion at the upper end of the main body is movable up and down in the operation space of the cover, and the abutment portion is located below the webbing abutment portion, The raised cover can press the abutting portion against the webbing abutting portion of the main body to move the main body and the slider relative to each other, The webbing height adjusting device according to claim 11, characterized in that the main body and the slider are moved relative to each other by manipulating the cover to move downward and bring the cover into contact with the slider.

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 abutment 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 with each other 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 oblique 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 abutment portion to one end of the side plate adjacent to the webbing abutment portion, a top end of the side plate is higher than the top end of the end plate and an upper end groove mouth of the oblique groove, and one end of the end plate adjacent to the oblique groove has a clamping surface that can clamp the auxiliary webbing together with a webbing contact end of the webbing abutment portion.

14. 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 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 adjustment device of 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 portion of the webbing connecting portion has an abutment surface extending to a lower portion of the perforation, and a position regulating pillar is formed on the abutment surface of the webbing connecting portion, the position regulating pillar protruding toward the frame and having a pitch between the abutment surface 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 ends, a middle portion of which is positioned between the abutment surface of the webbing connection portion and the position regulating post, and both end portions of which abut against bottom portions of the end plates of the slider.

16. 13. The webbing height adjustment device according to claim 12, 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 a 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. The webbing height adjustment 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 anti-slip surfaces, and the back plate of the cover is formed with an accommodation groove into which the side plate 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 outer plate and the bridge portion, 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 take-up in the seat belt system, the webbing height adjustment device 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 parts connected to an upper end and a lower end of the auxiliary webbing, respectively, and a D-ring provided at an upper end of the elastic part located at an upper part, the D-ring and lower ends of the elastic part located at a lower part are connected to upper and lower positions of the vehicle, respectively, the main webbing passes through the D-ring, both sides of the main webbing located at the D-ring are a webbing rear section and a webbing front section, respectively, and the auxiliary webbing is located between the webbing rear section and the webbing front section; a webbing height adjuster provided below the D-ring and connected between the webbing front 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 on an upper section and a lower section of the frame, a moving 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 that is attached to the moving space of the main body so as to be movable up and down and has 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 abutment portion of the main body; a cover that is fitted onto the outside of the main body so as to be vertically movable, the cover being capable of displacing the slider and the main body relatively to each other to release the clamped state of the auxiliary webbing by operating the cover, 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.

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, The webbing abutment portion at the upper end of the main body is movable up and down in the operation space of the cover, and the abutment portion is located below the webbing abutment portion, The raised cover can press the abutting portion against the webbing abutting portion of the main body to move the main body and the slider relative to each other, The webbing height adjusting device according to claim 19, characterized in that the main body and the slider are moved relative to each other by manipulating the cover to move downward and contact the slider.

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 abutment 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 an end plate, a side plate, and an inter-plate connection portion, the end plate and the side plate are arranged in parallel with each other 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 oblique 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 abutment portion to one end of the side plate adjacent to the webbing abutment portion, a top end of the side plate is higher than the top end of the end plate and an upper end groove mouth of the oblique groove, and one end of the end plate adjacent to the oblique groove has a clamping surface that can clamp the auxiliary webbing together with a webbing contact end of the webbing abutment portion.

22. 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 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 adjustment device 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 passageway.

23. a top portion of the webbing connecting portion has an abutment surface extending to a lower portion of the perforation, and a position regulating pillar is formed on the abutment surface of the webbing connecting portion, the position regulating pillar protruding toward the frame and having a pitch between the abutment surface 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 ends, a middle portion of which is positioned between the abutment surface of the webbing connection portion and the position regulating post, and both end portions of which abut against bottom portions of the end plates of the slider.

24. 21. The webbing height adjustment device according to claim 20, 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.

25. The webbing height adjustment 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 anti-slip surfaces, and the back plate of the cover is formed with an accommodation groove 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 outer plate and the bridge portion, 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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