Webbing height adjuster and webbing height adjusting device

Abstract

To provide a webbing height adjusting device capable of adjusting the height position of an upper positioning point.SOLUTION: There is provided a webbing height adjusting device used in a three-point seatbelt system for a vehicle. A body of the webbing height adjusting device is provided with a slider which is coupled with an elastic member and can exert an action of clamping together with the body by elastic action, and is provided with a cover outside the body. The webbing height adjusting device includes: a supplementary webbing assembly which is connected to upper and lower positions on a seat side respectively via a D-loop provided at an upper end of a supplementary webbing and a lower end of the supplementary webbing; and a webbing height adjusting unit which is connected between the supplementary webbing and a webbing shoulder portion where a main webbing of the three-point seatbelt system passes through the D-loop, constitutes an upper positioning point for the main webbing that restrains an occupant on a seat and is capable of locking the supplementary webbing.SELECTED DRAWING: Figure 18

Description

[Technical Field]

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

[0002] Conventionally, three-point seat belt systems in vehicles such as cars, trucks, and sport utility vehicles (SUVs) provide safety protection for occupants, such as the driver or passenger, seated in the seat. The three-point seat belt system's webbing retractor is attached to one side of the vehicle body near the seat. The main webbing extending from the webbing retractor extends upward to pass through a D-loop above the pillar on one side of the seat, and the end of the main webbing leaving the webbing retractor is then secured to the pillar. To use the three-point seat belt system, the main webbing is passed diagonally downward from the upper front of the seat occupant's shoulders and chest, and the connecting tongue of the main webbing is inserted into the seat buckle on the other side of the seat. The main webbing then passes through another portion of the connecting tongue and extends toward the side of the seat near the webbing retractor, so that the main webbing is laid horizontally in front of the occupant's abdomen, completing the three-point seat belt system.

[0003] However, in conventional three-point seat belt systems for vehicles, the shoulder portion of the main webbing, which presses against the shoulders and chest of the seat occupant from an oblique direction, must restrain the seat occupant with considerable tension. Furthermore, three-point seat belt systems for vehicles are usually limited in the range of height adjustment possible with the D-loop attached to the upper part of the pillar on one side of the seat. Furthermore, if the height of the upper positioning point of the main webbing, which is close to the seat occupant's shoulders, cannot be properly adjusted after the occupant's body is tightly fastened to the main webbing, the neck of the seat occupant may be injured by the main webbing in an emergency. Therefore, a webbing height adjuster attached to the D-loop on the upper part of the pillar on one side of the seat is required to enable the seat occupant to adjust the height of the upper positioning point of the main webbing to suit their own body type. Providing this adjuster ensures the safety of the seat occupant when using the three-point seat belt system. In addition, in today's world where the safety of occupants such as drivers and passengers in vehicles is becoming increasingly important, the webbing height adjuster of a three-point seat belt system has already become an essential safety device.

[0004] An example of a conventional webbing height adjuster structure for a three-point seat belt system is the webbing height adjuster device disclosed in U.S. Pat. No. 1,065,442. This structure includes a D-loop member attached to one upper side of a vehicle seat, a movable frame, a movable member movably attached to the movable frame, and an outer cover fitted over the outside of the movable frame. The main webbing connected to a webbing retractor in the three-point seat belt system passes through the movable frame or a connecting member connected thereto and the D-loop structure in that order, and the webbing shoulder portion of the main webbing passes between the movable frame and the movable member. This causes the movable frame and the movable member to move relative to each other under the tension of the main webbing, thereby tightening and locking the main webbing so as to provide a height-adjustable upper positioning point for a seat occupant. When the webbing adjuster is not in use, the outer cover fitted over the outside of the movable frame can be hooked onto the D-loop to store the webbing.

[0005] The webbing adjuster of the conventional three-point seat belt system is connected between the front portion of the main webbing, which is located between the webbing take-up retractor and the D-loop structure, and the shoulder portion of the webbing, which is placed diagonally across the shoulder and chest of the seat occupant, and can therefore adjust the height of the upper positioning point of the main webbing. However, the webbing height adjuster clamps and locks the main webbing in response to the tension of the main webbing that restrains the seat occupant, and the webbing height adjuster itself does not have an autonomous clamping and locking function. Therefore, when the tension applied by the main webbing to the webbing height adjuster decreases, the clamping force of the webbing height adjuster also decreases as the tension of the main webbing decreases. As a result, the webbing height adjuster is no longer able to clamp and lock the main webbing, and gravity causes the webbing height adjuster to slide down along the main webbing. Therefore, if there is no occupant on the seat using the three-point seat belt system, the webbing height adjuster slides down along the main webbing to a low position on one side of the seat, so the occupant must position the webbing height adjuster by hooking the cover onto the D-loop member on the pillar before leaving the seat.As a result, every time the occupant sits in the seat, they must connect the main webbing, then detach the webbing height adjuster from the D-loop member and readjust the height position of the webbing height adjuster on the main webbing, which is very inconvenient to use and operate. Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention aims to provide a webbing height adjuster and a webbing height adjusting device to solve the problem of operational inconvenience when adjusting the height position of the upper positioning point by a webbing height mechanism applied to a three-point seat belt system, as disclosed in U.S. Patent Publication US10654442. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides the following webbing height adjuster, namely: 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, respectively, wherein a movement space is formed between the webbing abutment portion and the frame, and a webbing passage is formed between the webbing connection portion and the frame; a slider attached to the moving space of the main body so as to be movable up and down and having an oblique groove; an elastic member attached between the slider and the main body and providing elastic force to generate a force that clamps the slider and the webbing abutment portion of the main body relative to each other; The present invention proposes a webbing height adjuster that includes a cover that is fitted onto the outside of the main body so as to be movable up and down, and by operating the cover, the slider and the main body are displaced relative to each other to release the clamped state, and when the cover is released, the elastic force of the elastic member causes the slider and the main body to return to a state in which they are clamped relative to each other.

[0008] In order to achieve the above object, the present invention provides the following other webbing height adjusting device, namely: A webbing height adjustment device used in a three-point seat belt system of a vehicle, the webbing height adjustment device being connected to a main webbing extending from a webbing retractor in the three-point seat belt system, an auxiliary webbing assembly attached to the vehicle, the auxiliary webbing having an auxiliary webbing and a D-loop provided at an upper end of the auxiliary webbing, the D-loop and a lower end of the auxiliary webbing being connected to upper and lower positions of the vehicle, the main webbing passing through the D-loop, portions of the main webbing on both sides located at the D-loop being a webbing front section and a webbing shoulder section, respectively, and the auxiliary webbing being located between the webbing front section and the webbing shoulder section; a webbing height adjuster that is provided below the D-loop and is connected between the webbing shoulder portion of the main webbing and the auxiliary webbing so as to be configured to adjust an upper positioning point of a height position, The webbing height adjuster is a main body including a frame, and a webbing abutment portion and a webbing connection portion formed on an upper section and a lower section of the frame, respectively, wherein a movement space through which the auxiliary webbing passes is formed between the webbing abutment portion and the frame, and a main webbing passage through which the shoulder portion of the webbing passes is formed between the webbing connection portion and the frame; a slider attached to the moving space of the main body so as to be movable up and down and having an oblique groove through which the auxiliary webbing passes; an elastic member attached between the slider and the main body and providing elastic force so that the slider can clamp the auxiliary webbing together with the webbing contact portion of the main body; The present invention proposes a webbing height adjustment device that includes a cover that is fitted onto the outside of the main body so as to be movable up and down, and that allows the slider and the main body to be displaced relative to each other by operating the cover so as to release the clamped state of the auxiliary webbing, and that when released, allows the slider and the main body to clamp the auxiliary webbing by the elastic force of the elastic member.

[0009] According to the invention of the webbing height adjuster and the webbing height adjusting device, when applied to a three-point seat belt system of a vehicle, the following effects are achieved. 1. Height adjustment function for the upper positioning point of the main webbing: When the webbing height adjuster and webbing height adjusting device of the present invention are connected to the main webbing of a three-point seat belt system of a vehicle, and the webbing height adjuster is connected between the webbing shoulder portion of the main webbing and the auxiliary webbing of the auxiliary webbing assembly, the main webbing connected to the webbing take-up device can pass freely through the webbing height adjuster. Therefore, when a seat occupant correctly fastens the main webbing, the main webbing connected to the webbing take-up device can provide a safety protection function for the seat occupant, and the webbing height adjuster allows the seat occupant to manually adjust the upper positioning point of the height position. 2. Automatic locking function and good positioning effect: In the webbing height adjuster of the present invention, the slider, acting under the action of an elastic force, clamps the assistant webbing together with the webbing abutment portion of the main body, and as the elastic member continues to apply an elastic force to the slider, the webbing height adjuster is automatically locked so as to be positioned on the assistant webbing. Also, when an occupant sits on the seat and accurately connects the main webbing, the assistant webbing located below the D-loop 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 shoulder portion of the main webbing that has passed through the D-loop enters from one side of the main body into the main webbing passage at the webbing connection portion and passes through the other side of the main body, and then the webbing of the main webbing is locked. The shoulder portion of the seat curves to restrain the torso of the occupant on the seat, and the tension of the main webbing increases due to the winding force of the webbing take-up device on the main webbing, which in turn increases the tension of the auxiliary webbing via the webbing height adjuster.As a prerequisite for the webbing height adjuster to clamp and lock the auxiliary webbing of its own accord, as the tension of the auxiliary webbing and main webbing increases, the clamping and locking force between the main body of the webbing height adjuster and the slider on the auxiliary webbing increases, resulting in a better and stronger positioning effect. 3. Excellent ease of operation: In the present invention, the webbing height adjuster is connected between the webbing shoulder portion of the main webbing and the assistant webbing. Therefore, when adjusting the height position of the webbing height adjuster after forming an upper positioning point above one side of the seat occupant, the seat occupant can directly and easily release the clamping action on the assistant webbing by grasping the cover and pushing down on the slider or applying force to the main body so that the slider and the main body are displaced relative to each other against the elastic force of the elastic member. The height position can then be adjusted by sliding the webbing height adjuster along the main webbing and assistant webbing. Therefore, the present invention can be applied to a three-point seat belt system, and can provide good operational convenience for the occupant sitting in the seat. 4. Stepless height adjustment: The webbing height adjuster of the present invention is connected between the webbing shoulder portion of the main webbing and the auxiliary webbing of the auxiliary webbing assembly, and the elastically acted slider clamps the auxiliary webbing together with the webbing abutment portion of the main body, allowing the main webbing to pass freely through the main webbing passage at the lower end of the main body of the webbing height adjuster, allowing an occupant sitting on the seat to freely adjust the height position from above on one side. 5. The position of the webbing height adjuster remains unchanged even when a force is applied to the seat occupant: As described above, in the webbing height adjuster connected between the webbing shoulder portion of the main webbing and the auxiliary webbing of the auxiliary webbing assembly, the slider, which is subjected to an elastic force, clamps the auxiliary webbing together with the webbing abutment portion of the main body, and the webbing height adjuster automatically locks and positions the auxiliary webbing. The main webbing connected to a webbing take-up reel in a three-point seat belt system can freely pass through the main webbing passage at the lower end of the main body of the webbing height adjuster. Therefore, when a seat occupant correctly fastens the main webbing, the main webbing connected to the webbing take-up reel provides a safety protection function for the seat occupant. At the same time, the position of the webbing height adjuster is fixed and immovable due to the tension of the auxiliary webbing, so that the auxiliary webbing is more firmly clamped. Furthermore, the clamping force of the webbing height adjuster on the auxiliary webbing is positively correlated with the tension of the auxiliary webbing, and therefore, change in the position of the auxiliary webbing can be minimized. 6. When a passenger sits on the seat, there is no need to readjust the webbing height adjuster: As described above, in the webbing height adjuster connected between the webbing shoulder portion of the main webbing and the auxiliary webbing of the auxiliary webbing assembly, the elastically acted slider clamps the auxiliary webbing together with the webbing abutment portion of the main body, and the webbing height adjuster is fixed above one side of the seat occupant. This allows the main webbing connected to the webbing take-up reel in a three-point seat belt system to pass freely through the main webbing passage in the main body of the webbing height adjuster. Therefore, when the occupant leaves the seat, the main webbing is automatically wound by the webbing take-up reel, and at that time, the wound main webbing passes freely through the webbing height adjuster, so the position of the webbing height adjuster on the auxiliary webbing does not change. Therefore, after the 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 auxiliary webbing, there is no need to readjust the position of the webbing height adjuster when the original occupant sits on the seat again.

[0010] Furthermore, in the webbing height adjusting device of the present invention, a bridge structure formed on the outer plate of the cover allows the main webbing to pass between the bridge portion of the cover and the outer plate, and further allows the main webbing passage of the main body to be established through it. Therefore, the bridge portion assists in guiding the main webbing in a direction approaching the webbing height adjuster, thereby allowing the main webbing to move smoothly. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view of a webbing height adjuster according to an embodiment of the present invention; [Figure 2] 2 is a perspective view of the webbing height adjuster shown in FIG. 1 from another viewing angle; FIG. [Figure 3] 2 is a schematic side plan view of the embodiment of the webbing height adjuster shown in FIG. 1. FIG. [Figure 4] 3 is a perspective schematic view of a local portion of the embodiment of the webbing height adjuster shown in FIGS. 1 and 2, with the cover disassembled. FIG. [Figure 5] 3 is a perspective schematic view of a local portion of the embodiment of the webbing height adjuster shown in FIGS. 1 and 2, with the cover disassembled, from another viewing angle. FIG. [Figure 6] 6 is a perspective exploded schematic view of a main body, a slider, and an elastic member in the embodiment of the webbing height adjuster shown in FIGS. 1, 2, 4, and 5. FIG. [Figure 7] 6 is an exploded perspective schematic view of a main body, a slider, and an elastic member in the embodiment of the webbing height adjuster shown in FIGS. 1, 2, 4, and 5, viewed from another viewing angle. FIG. [Figure 8] FIG. 6 is a schematic perspective view of a frame in the main body shown in FIGS. 1, 2, 4 and 5. [Figure 9] 6 is a schematic side cross-sectional view of the embodiment of the webbing height adjuster shown in FIGS. 1, 2, 4 and 5. FIG. [Figure 10] 4 is a cross-sectional view of the webbing height adjuster shown in FIG. 3 taken along line AA. FIG. [Figure 11]2 is a schematic perspective view showing a state in which the embodiment of the webbing height adjuster of the present invention shown in FIG. 1 is installed to penetrate two webbing portions. FIG. [Figure 12] 2 is a schematic side cross-sectional view showing the state in which the embodiment of the webbing height adjuster of the present invention shown in FIG. 1 is installed to penetrate two webbing portions. FIG. [Figure 13] 10 is a perspective view of a webbing height adjuster according to another embodiment of the present invention; FIG. [Figure 14] 14 is a schematic side cross-sectional view of the embodiment of the webbing height adjuster shown in FIG. 13. FIG. [Figure 15] 14 is a schematic perspective view showing a state in which the embodiment of the webbing height adjuster shown in FIG. 13 is installed to penetrate two webbing portions. FIG. [Figure 16] 14 is a schematic side cross-sectional view showing a state in which the embodiment of the webbing height adjuster shown in FIG. 13 is installed to penetrate two webbing portions. FIG. [Figure 17] 1 is a schematic plan view showing a state in which an embodiment of a webbing height adjusting device of the present invention is applied to a three-point seat belt system. [Figure 18] FIG. 18 is a reference diagram showing a state in which the webbing height adjuster shown in FIG. 17 is in a clamping state. [Figure 19] 19 is a schematic view of the operation of the webbing height adjuster shown in FIGS. 17 and 18 when the height position is adjusted upward, as viewed from another viewing angle. FIG. [Figure 20A] 19 is a first schematic operation diagram of a side cross section taken along line BB when the height position of the webbing height adjuster shown in FIG. 18 is adjusted upward. FIG. [Figure 20B] 19 is a second schematic diagram of a side cross section taken along line CC when the height position of the webbing height adjuster shown in FIG. 18 is adjusted upward. FIG. [Figure 21] 19 is a schematic view of the operation of the webbing height adjuster shown in FIG. 18 when the height position is adjusted downward, as viewed from another viewing angle. [Figure 22] FIG. 22 is a side cross-sectional view taken along line DD when the height position of the webbing height adjuster shown in FIG. 21 is adjusted downward. [Figure 23]19 is a schematic diagram (1) of another operation method when adjusting the height position by applying pressure to the webbing height adjuster shown in FIGS. 17 and 18. FIG. [Figure 24] 19 is a schematic diagram (II) of another operation method when adjusting the height position by applying pressure to the webbing height adjuster shown in FIGS. 17 and 18. FIG. [Figure 25] 19 is a schematic diagram (III) of another operation method when adjusting the height position by applying pressure to the webbing height adjuster shown in FIGS. 17 and 18. FIG. [Figure 26] FIG. 19 is a schematic diagram of the webbing height adjuster shown in FIGS. 17 and 18 when no passenger is on the seat. DETAILED DESCRIPTION OF THE INVENTION

[0012] According to the above-mentioned invention, the present invention includes a webbing height adjuster and a webbing height adjusting device for use in a three-point seat belt system of a vehicle. Hereinafter, the specific structures of the webbing height adjuster and the webbing height adjusting device of the present invention will be described in detail with reference to the drawings.

[0013] 1 to 5 show an embodiment of the webbing height adjuster of the present invention, according to which the webbing height adjuster 3 includes a main body 30, a slider 40, an elastic member 50, and a cover 60. The specific structure of each member in the webbing height adjuster 3 will be described in detail below.

[0014] As shown in Figures 6 and 7, the main body 30 includes a frame 31, a webbing abutment portion 32 and a webbing connection portion 33 formed on the upper and lower portions of the frame 31, respectively, and a movement space 321 is formed between the webbing abutment portion 32 and the frame 31, and a webbing passage 331 is formed between the webbing connection portion 33 and the frame 31.

[0015] 4 to 7 and 9, in this embodiment, the opposing sides of the main body 30 are a first side 301 and a second side 302, respectively, and the frame 31 is a member made of a rigid material, which can be an iron-based metal material or other materials. The frame 31 has a perforation 311 and an assembly hole 312 formed below the perforation 311. The perforation 311 includes a perforation base 3111 and an elongated hole portion 3112 below the perforation base 3111 so as to be continuous with the perforation base 3111. The width of the perforation base 3111 is wider than the elongated hole portion 3112.

[0016] As shown in Figures 11 and 12, the movement space 321 and webbing passage 331 of the main body 30 allow the webbing portion a and the webbing portion b to pass through two different locations in the three-point seat belt system, respectively. The webbing portion a passes through the movement space 321 from the first side 301 of the main body 30 to the second side 302 of the main body 30, and the webbing portion b passes through the webbing passage 331 from the first side 301 of the main body 30 to the second side 302 of the main body 30.

[0017] 4 to 7, 9, and 12, the webbing abutting portion 32 is molded from a plastic material and covers the upper part of the frame 31. A movement space 321, which is a space through which the webbing portion a passes, is formed between the webbing abutting portion 32 and the perforation 311 of the frame 31, and the webbing abutting portion 32 is a portion with which the webbing portion a abuts. The webbing abutting portion 32 is preferably molded from a plastic material that has excellent abrasion resistance. In this embodiment, the lower end of the webbing abutting portion 32 partially extends into the upper end of the perforation base 3111, the space from the bottom surface of the webbing abutting portion 32 to the bottom edge of the perforation base 3111 of the perforation 311 is the movement space 321, and the bottom end of the webbing abutting portion 32 adjacent to the movement space 321 is a webbing contact end portion 322 that is a portion that comes into contact with the webbing portion a.

[0018] As shown in Figures 4 to 7 and 9, the webbing connection portion 33 is molded from a plastic material and covers the lower part of the frame 31. By connecting the webbing connection portion 33 to the lower end of the assembly hole 312 in the frame 31, a webbing passage 331 through which the webbing portion b passes is formed as shown in Figures 11 and 12, and the webbing connection portion 33 is a portion with which the webbing portion b abuts. The webbing connection portion 33 is preferably molded from a plastic material that has excellent abrasion resistance. Furthermore, both the upper and lower wall surfaces of the webbing connection portion 33 in the webbing passage 331 present arc-shaped surfaces, which allows the webbing portion b to pass smoothly over the main webbing and allows the webbing portion b to bend in other directions by abutting against the upper or lower wall surface of the webbing passage 331.

[0019] As shown in FIGS. 6, 7 and 9, in this embodiment, the top of the webbing connecting portion 33 has a contact surface 332 that extends to the stretched hole portion 3112 of the perforation 311, and the contact surface 332 of the webbing connecting portion 33 is provided with a position regulating post that protrudes toward the stretched hole portion 3112 of the frame 31 and has a pitch between it and the contact surface 332.

[0020] 4 to 7, 9, and 12, the slider 40 is attached to the main body 30 so as to be able to move up and down, and has a diagonal groove 44. In this embodiment, the slider 40 is attached to the movement space 321 of the main body 30 so as to be able to move up and down, has the diagonal groove 44 through which the webbing portion a passes, and together with the webbing abutment portion 32 of the main body 30, the slider 40 clamps and positions the webbing portion a, and can move along the webbing portion a.

[0021] 4 to 7 and 9, in this embodiment, the slider 40 includes an end plate 41, a side plate 42, and an inter-plate connection portion 43. The end plate 41 and the side plate 42 are arranged side by side with a pitch between them. The inter-plate connection portion 43 is integrally molded between the end plate 41 and the side plate 42. A diagonal groove 44 is provided in the inter-plate connection portion 43 and penetrates the side plate 42 obliquely upward and downward toward the bottom end of the side plate 42. When the slider 40 is attached to the movement space 321 of the main body 30, the end plate 41 and the side plate 42 are located on the first side 301 and the second side 302 of the main body 30, respectively, and the inter-plate connection portion 43 is located in the movement space 321. As shown in FIG. 12, the top of the end plate 41 has a clamping surface 411 that can clamp the webbing portion a together with the webbing contact end portion 322 at the bottom end of the webbing abutting portion 32 adjacent to the movement space 321.

[0022] 7, the top end of the side plate 42 is higher than the top end of the end plate 41 and the upper groove opening of the diagonal groove 44, and an upwardly extending mounting groove 412 is further formed in the bottom of the end plate 41. In addition, in the embodiment shown in FIG. 5, a sliding groove 323 is formed in the second side 302 of the webbing abutting portion 32 of the main body 30, and the side plate 42 of the slider 40 can enter the sliding groove 323 and move up and down.

[0023] 4, 5, 9, and 12, the elastic member 50 is attached between the slider 40 and the main body 30 and provides elastic force to generate a force that clamps the slider 40 and the webbing abutting portion 32 of the main body 30 relative to each other. In this embodiment, the elastic member 50 is attached between the slider 40 and the top of the webbing connection portion 33 and provides elastic force that clamps and positions the webbing portion a together with the webbing abutting portion 32 of the main body 30. 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 and the main body 30 clamping the webbing portion a is released, releasing the webbing portion a, while the elastic member 50 is compressed and storing elastic force energy. Furthermore, when the tension of the webbing portion a increases, the clamping force of the slider 40 and the main body 30 on the webbing portion a becomes stronger, so that the webbing portion a is more firmly clamped.

[0024] The elastic member 50 may be a spring, an elastic sheet, or other equivalent elastic member, and the number of elastic members may be increased according to actual needs. As shown in Figures 4 to 7 and 9, in this embodiment, the elastic member 50 is an arc-shaped elastic sheet 51 that is low in the center and curves upward at both ends. The middle portion 511 of the elastic sheet 51 abuts against the abutment surface 332 of the webbing connection portion 33, and the position-regulating posts 333 regulate the position of the arc-shaped elastic sheet 51 above the middle portion 511. The both ends of the arc-shaped elastic sheet 51 abut against the bottom of the end plate 41 of the slider 40 and extend upward into the mounting groove 412 at the bottom of the end plate 41, and the both ends of the arc-shaped elastic sheet 51 abut against both sides of the top wall of the mounting groove 412. This allows the elastic member 50 to provide an equal elastic force to both sides of the slider 40, thereby enabling stable relative movement between the slider 40 and the main body 30.

[0025] 1, 2, 9, and 12, the cover 60 is fitted onto the outside of the main body 30 so as to be vertically movable, and the slider 40 and the main body 30 can be displaced relative to each other by operating the cover 60 so as to release the clamped state of the webbing portion a, and when released, the slider 40 and the main body 30 return to a state in which they clamp the webbing portion a by the elastic force of the elastic member 50. In this embodiment, the cover 60 is assembled onto the outside of the upper section of the main body 30, and the slider 40 and the main body 30 are displaced relative to each other to release the clamped state of the webbing portion a, and the slider 40 or the main body 30 is operated so that the webbing height adjuster 3 can be moved up and down along the webbing portion a and the webbing portion b to adjust the height position.

[0026] As shown in Figures 4 and 5, in this embodiment, the cover 60 can be selected as a member consisting of a cover base 60A and a cover lid 60B that are fitted together and fixed, and the inner surfaces of the cover base 60A and the cover lid 60B are provided with a plurality of ribs 601A and 601B, respectively, to enhance the mechanical strength of the cover base 60A and the cover lid 60B.

[0027] As shown in Figures 4, 9 and 10, two abutment portions 60C are formed inside the upper part of the cover 60, located on both sides of the operation space 600 and below the operation space 600, and the webbing abutment portion 32 at the upper end of the main body 30 is movable up and down in the operation space 600 of the cover 60, and the abutment portions 60C are located below the webbing abutment portion 32, and when the cover 60 is pulled up, the abutment portions 60C are pressed against the webbing abutment portion 32 of the main body 30, allowing the main body 30 and the slider 40 to move relative to each other. In addition, the bottom of the cover 60 is brought into contact downward with the side plate 42 of the slider 40, allowing the main body 30 and the slider 40 to move relative to each other.

[0028] As shown in FIGS. 1 to 3, 6, 7 and 9, 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 abutting on the top of the side plate 42, an outer plate 62 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 connected to the top end of the back plate 61, and 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 in contact with the webbing abutment portion 30 of the main body 30. 9 to 12, webbing portion a 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, whereby it is sandwiched between the slider 40 and the main body 30 under the elastic action, and webbing portion b passes through the outside of the outer plate 62 of the cover 60 and passes through the webbing passage 331 in the webbing connection portion 33 of the main body 30, and then extends downward to the other side.

[0029] As shown in Figures 12, 9 and 10, when the slider 40 and the main body 30 clamp the webbing portion a, the cover 60 naturally descends due to gravity and abuts against the top of the side plate 42 of the slider 40 which is pressed upward by the elastic member 50, and further, there is an operating pitch S between the bottom surface of the end plate 63 of the cover 60 (i.e., the side surface of the end plate 63 facing the operating space 600) and the top of the webbing abutment portion 32 of the main body 30. By operating the cover 60 downward to abut against the slider 40, the slider 40 and the main body 30 move relatively by the distance of the operating pitch S, and further, the bottom surface of the end plate 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 of relative movement between the slider 40 and the main body 30, thereby preventing the elastic member 50 from being deformed by excessive acting force, and thereby maintaining an appropriate elastic effect of the elastic member 50 between the slider 40 and the main body 30. Furthermore, although the webbing abutment portion 32 at the upper end of the main body 30 can move up and down in the operating space 600 of the cover 60, the movement distance is limited by the lower part of the abutment portion 60C of the webbing abutment portion 32, so separation between the cover 60 and the main body 30 can be prevented.

[0030] As shown in Figures 1 and 2, in this embodiment, the back plate 61 of the cover 60 and the end plate 63 connected to the top end of the back plate 61 each have side walls 65 on their outer peripheries that form anti-slip surfaces 651, so that an occupant on the seat can grip the cover 60 and operate it by displacing the slider 40 and the main body 30 relative to each other.

[0031] As shown in Figure 9, in this embodiment, a receiving groove 611 is further formed at the bottom of the back plate 61 of the cover 60, into which the top end of the side plate 42 of the slider 40 can enter, thereby allowing the cover 60 and the slider 40 to be directly linked together.

[0032] As in other embodiments shown in Figures 13 to 16, a bridge 66 having a space between it and the outer plate 62 can be further formed on the outer plate 62 of the cover 60, thereby allowing the webbing portion b to pass through the space between the bridge 66 and the outer plate 62 and further pass through the webbing passage 331 in the webbing connection portion 33 of the main body 30, and therefore, with the assistance of the bridge 66 on the cover 60, the webbing portion b can be guided in a direction approaching the webbing height adjuster 3.

[0033] According to the overall structure of the webbing height adjuster 3 of the present invention, the structure is attached to a vehicle together with a three-point seat belt system and connected between two different webbing portions a and b located below the D-loop on one upper side of the seat of the three-point seat belt system, and the webbing height adjuster 3 is used to form an upper positioning point whose height position is adjustable for the seat occupant. In this embodiment, the two different webbing portions a and b may be respective webbing portions of two different webbings, for example, a webbing shoulder portion of a main webbing and a webbing portion of an assistant webbing in a three-point seat belt system.

[0034] The configuration in which the webbing height adjuster 3 is installed in a three-point seat belt system is basically the same as the usage in which the webbing height adjuster of the present invention described below is applied to a three-point seat belt system, so a description thereof will be omitted here.

[0035] 17, the webbing height adjusting device of the present invention is used in a vehicle seat belt system, which is a three-point seat belt system 1, and which includes a webbing retractor 1B located on the side of a vehicle seat closer to the pillar and a main webbing 1A extending from the webbing retractor 1B, the main webbing 1A being a flexible, long sheet member that cannot elastically deform and whose end is fixed to the side of the seat or below the pillar, the webbing retractor 1B automatically retracting the main webbing 1A, and the main webbing 1A is provided with a connecting tongue 1C, which is detachably attached to a seat buckle 1D on the other side of the seat (i.e., the side away from the pillar). Note that because the three-point seat belt system 1 is a conventional product, its specific structure will not be described in detail.

[0036] 17, the webbing height adjusting device of the present invention includes an auxiliary webbing assembly 2 and a webbing height adjuster 3. The specific structures of the auxiliary webbing assembly 2 and the webbing height adjuster 3 will be described below.

[0037] 17, the assistance webbing assembly 2 is attached to the side of the vehicle seat that is closer to the pillar, and has an assistance webbing 2A and a D-loop 2B provided at the upper end of the assistance webbing 2A, and is connected to upper and lower positions in the vehicle via the D-loop 2B and the lower end of the assistance webbing 2A. The D-loop 2B is located at an upper position of the pillar on one side of the seat, and the main webbing 1A passes through the D-loop 2B, thereby forming two webbing portions on both sides of the D-loop 2B, and the assistance webbing 2A is located between the two webbing portions of the main webbing 1A.

[0038] 17, when an occupant on a seat connects the main webbing 1A, the main webbing 1A is passed diagonally downward from the upper front portion of the shoulders and chest of the occupant on the seat, and the connecting tongue 1C of the main webbing 1A is inserted into the seat buckle 1D on the other side of the seat. The main webbing 1A passes through another webbing portion of the connecting tongue 1C and extends toward one side of the seat closer to the webbing retractor 1B, so that the main webbing 1A is placed horizontally in front of the abdomen of the occupant on the seat, thereby forming a three-point seat belt system 1, and the main webbing 1A of the three-point seat belt system 1 can restrain the body of the occupant on the seat in the vehicle. Furthermore, the webbing portion of the main webbing 1A that is positioned between the webbing reel 1B and the D-loop 2 is referred to as the webbing front section 11A, and another webbing portion of the main webbing 1A that passes through the D-loop 2 and then restrains the shoulders and chest of the seat occupant in a diagonal direction is referred to as the webbing shoulder section 12A. The webbing front section 11A and the webbing shoulder section 12A are respectively positioned at different positions on both sides of the D-loop 2, and the auxiliary webbing 2A is positioned between the webbing front section 11A and the webbing shoulder section 12A.

[0039] The specific structure of the webbing height adjuster 3 of the present invention has already been explained above, so explanation thereof will be omitted here. To explain further, as shown in Figures 17 and 18, the webbing height adjuster 3 of the three-point seat belt system 1 of the present invention is connected between the webbing shoulder portion 12A of the main webbing 1A and the assistance webbing 2A, and constitutes an upper positioning point whose height position can be adjusted with respect to the occupant on the seat. In addition, the webbing shoulder portion 12A of the main webbing 1A passes from the first side 301 of the main body 30 through the webbing connection portion 33 and the webbing passage 331 in the frame 31 and extends from the second side 302 of the main body 30, and the auxiliary webbing 2A passes from the first side 301 of the main body 30 through the movement space 321 located between the webbing abutment portion 32 and the frame 31, passes through the diagonal groove 44 of the slider 40 which moves up and down in the movement space 321 of the main body 30, and then extends from the second side 302 of the main body 30, and due to the elasticity of the elastic member 50 attached between the slider 40 and the main body 30, the slider 40 clamps the auxiliary webbing 2A together with the webbing abutment portion 32 of the main body 30, so that the webbing height adjuster 3 can be fixed to the auxiliary webbing 2A. By operating the cover 60 of the webbing height adjuster 3, the slider 40 and the main body 30 are displaced relative to each other, releasing the clamped state of the assistance webbing 2A and making it possible to adjust the height position of the webbing height adjuster 3. On the other hand, when the cover 60 is released, the slider 40 and the main body 30 clamp the assistance webbing 2A due to the elastic force of the elastic member 50.

[0040] As shown in FIGS. 17 and 18, when an occupant sits on the seat and correctly connects the main webbing, the main webbing 1A connected to the webbing reel 1B can freely pass through the webbing height adjuster 3, thereby providing a safety protection function for the occupant on the seat and enabling the webbing height adjuster 3 to adjust the upper positioning point of the height position below the D-loop 2 and above the side of the occupant on the seat. Therefore, the webbing height adjuster 3 can change the position at which the webbing shoulder portion 12A of the main webbing 1A restrains the shoulders and chest of the seat occupant in the diagonal direction, and by fixing the webbing height adjuster 3 to the assistance webbing 2A, the webbing shoulder portion 12A of the main webbing 1A can pass freely through the webbing height adjuster 3, so the webbing shoulder portion 12A of the main webbing 1A curves at the bottom of the webbing connection part 33 and restrains the shoulders and chest of the seat occupant, thereby reducing discomfort felt by the seat occupant restrained by the main webbing 1A.

[0041] 17 and 18 , when an occupant on the seat operates to adjust the height position of the webbing height adjuster 3 connected between the assistance webbing 2A and the webbing shoulder portion 12A of the main webbing 1A (i.e., the height position of the upper positioning point), the main body 30 and the slider 40, subjected to the elastic action of the elastic member 50, relatively clamp the assistance webbing 2A and become one body, and the tension of the webbing shoulder portion 12A that has passed through the webbing passage 331 of the main body 30 acts on the main body 30, and the cover 60 is movably fitted onto the outside of the main body 30. As shown in FIGS. 18, 19, 20A and 20B , when adjusting the position of the webbing height adjuster 3 upward, the occupant on the seat simply grasps the cover 60 and presses 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, thereby releasing 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 shoulder 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 fastened state and fixing the height position of the webbing height adjuster 3, thereby providing excellent operational convenience.

[0042] 18, 21, and 22, when adjusting the height position of the webbing height adjuster 3 downward, the occupant on the seat grasps the cover 60 and presses the slider 40 downward, causing the cover 60 to press against the side plate 42 of the slider 40, thereby moving the slider 40 and the main body 30 relative to each other and releasing the locked state of the assistance webbing 2A, thereby allowing the height position to be adjusted downward. After adjusting to an appropriate height position, when the cover 60 is released, the slider 40 and the main body 30 are pressed against each other by the elastic action of the elastic member 50, returning the assistance webbing 2A to a state in which it is fastened, and the webbing height adjuster 3 can be fixed at the height position of the assistance webbing 2A and the webbing shoulder portion 12A of the main webbing 1A.

[0043] 18 and 23 to 25, in the present invention, the height position of the webbing height adjuster 3 may be adjusted using other operating methods. For example, when it is necessary to adjust the webbing height adjuster 3 up or down, the occupant on the seat can grasp the webbing height adjuster 3 and simultaneously press both the cover 60 and the main body 30 to relatively displace the slider 40 and the main body 30 until the assistant webbing 2A is in the unlocked state. In this way, the assistant webbing 2A can smoothly pass between the slider 40 and the main body 30, so the occupant on the seat can grasp the webbing height adjuster 3 and adjust the height position upward or downward along the assistant webbing 2A and the webbing shoulder portion 12A of the main webbing 1A. Then, after adjusting the webbing height adjuster 3 to an appropriate height position, when the webbing height adjuster 3 is released, the elastic action of the elastic member 50 presses the slider 40 and the main body 30 together, returning the assistance webbing 2A to a locked state, thereby maintaining the height position of the webbing height adjuster 3.

[0044] As shown in FIGS. 17 and 18 , when an occupant sits in a vehicle seat and correctly connects the main webbing 1A of the three-point seat belt system 1, the assistant webbing 2A located between the webbing front portion 11A and the webbing shoulder portion 12A of the main webbing 1A enters between the webbing abutting portion 32 and the slider 40 from the first side 301 of the main body 30 of the webbing height adjuster 3 and extends from the second side 302 of the main body 30, and the slider 40 is pressed against the slider 40 by the elastic member 50, thereby clamping the assistant webbing 2A together with the webbing abutting portion 32, and the webbing shoulder portion 12A of the main webbing 1A that has passed through the D-loop 2C freely enters the webbing passage 331 in the webbing connecting portion 33 from the first side 301 of the main body 30 and extends from the second side 302 of the main body 30, After bypassing the webbing connection portion 33 of the main body 30, the shoulder portion 12A curves to restrain the torso of the seat occupant, and at the same time, the tension of the main webbing 1A increases due to the action of the winding force of the webbing take-up device 1B on the main webbing 1A, and accordingly, the webbing shoulder portion 12A of the main webbing 1A, which restrains the torso of the seat occupant, increases the tension of the assistance webbing 2A via the webbing height adjuster 3. Therefore, on the assumption that the webbing height adjuster 3 autonomously clamps and locks the assistance webbing 2A, as the tension of the assistance webbing 2A increases, the clamping and locking force between the main body 30 and the slider 40 of the webbing height adjuster 3 on the assistance webbing 2A increases due to the tension, so the position of the webbing height adjuster 3 can be maintained fixed, resulting in a better positioning effect. In other words, the clamping force has a positive correlation with the tension of the main webbing 1A, and therefore, changes in the position of the main webbing 1A can be minimized.

[0045] 26, when there is no occupant in a vehicle seat, the main webbing 1A in an unused three-point seat belt system 1 is automatically retracted by the webbing retractor 1B, and the webbing shoulder portion 12A of the main webbing 1A naturally passes through the webbing height adjuster 3 and the D-loop 2B and is retracted, thereby shortening the length of the in-webbing 1A. Meanwhile, the webbing height adjuster 3 connected between the main webbing 1A and the assistance webbing 2A clamps the assistance webbing 2A between the slider 40 and the main body 30 by the elastic member 50 until it reaches a locked state, and therefore the webbing height adjuster 3 can be maintained at its original height position. Therefore, 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 shoulder 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, and there is no need to readjust the height position of the webbing height adjuster 3. [Explanation of symbols]

[0046] 1 Three-point seat belt system 1A Main Webbing 11A Front section of webbing 12A Webbing shoulder area 1B Webbing reel 1C Connection tongue 1D seat buckle 2 Assistance Webbing Assembly 2A Assistance Webbing 2B D-loop 3 Webbing height adjuster 30 Main Unit 301 First side 302 Second side 31 frames 311 Perforation 3111 Perforated base 3112 Extension hole part 312 Assembly hole 32 Webbing contact part 321 Moving Space 322 Webbing contact end 323 Sliding groove 33 Webbing connection 331 Webbing passage 332 Contact surface 333 Position Control Pillar 40 Slider 41 End plate 411 Clamping surface 412 Mounting groove 42 Side panel 43 Plate-to-plate connection 44 Diagonal groove 50 Elastic member 51 Arc-shaped elastic sheet 511 Middle 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 Panel 63 End plate 65 Side wall 651 Non-slip surface 66 Bridge S Operation pitch

Claims

1. A webbing height adjuster connected to a main webbing and an auxiliary webbing, The main webbing extends from a webbing retractor in a three-point seat belt system of the vehicle, passes through a D-loop connected to the upper part of the vehicle, and is mounted so as to be divided into a front portion and a rear portion; the auxiliary webbing is located between the front and rear portions of the main webbing and is connected between the D-loop and an underside of the vehicle; The webbing height adjuster is a main body including a frame, and a webbing abutment portion and a webbing connection portion formed on an upper section and a lower section of the frame, respectively, wherein a movement space is formed between the webbing abutment portion and the frame, and a webbing passage is formed between the webbing connection portion and the frame, and the webbing passage is configured so that a front portion of the main webbing passes through the webbing passage; a slider having a diagonal groove that is attached to the moving space of the main body so as to be movable up and down and configured so that an auxiliary webbing can pass through; an elastic member attached between the slider and the main body and providing elastic force so that a force is generated that relatively clamps the auxiliary webbing between the slider and the webbing contact portion of the main body; a cover that is fitted onto the outside of the main body so as to be movable up and down, and by operating the cover, the slider and the main body are displaced relative to each other to release the clamped state of the auxiliary webbing, and when the cover is released, the slider and the main body return to a state in which they relatively clamp the auxiliary webbing by the elastic force of the elastic member. A webbing height adjuster characterized by:

2. 2. The webbing height adjuster according to claim 1, wherein an operation space and two abutments are formed inside the upper section of the cover, each located on either side below the operation space, a webbing abutment portion at an upper end of the main body is movable up and down in the operation space of the cover, the abutment portion is located below the webbing abutment portion, and when the cover is pulled up, the abutment portion is pressed against the webbing abutment portion of the main body to move the main body and the slider relatively, and the main body and the slider are moved relatively by operating the cover to abut against the slider downward.

3. Opposing sides of the main body are a first side and a second side, and one end of the webbing abutment portion adjacent to the movement space has a webbing contact end portion, and the webbing contact end portion is located on the first side of the main body, 3. The webbing height adjuster according to claim 2, wherein the slider includes end plates, side plates, and inter-plate connection portions, the end plates and the side plates are arranged in parallel at a pitch and are located on a first side and a second side of the main body, the inter-plate connection portion is formed between the end plates and the side plates so as to pass through the movement space of the main body, the diagonal groove is formed in the inter-plate connection portion and penetrates obliquely from one end of the end plate adjacent to the webbing abutting portion to one end of the side plate adjacent to the webbing abutting portion, a top end of the side plate is higher than the top end of the end plate and an upper groove opening of the diagonal groove, and one end of the end plate adjacent to the diagonal groove has a clamping surface facing the webbing contact end of the webbing abutting portion.

4. 4. The webbing height adjuster according to claim 3, wherein the frame is formed with a perforation and an assembly hole located below the perforation, the perforation and the assembly hole extend from the webbing abutment portion molded in an upper section of the frame to an upper end of the perforation, the movement space is formed between the perforation and the webbing abutment portion, the webbing connection portion is molded to cover the lower section of the frame, and the webbing connection portion is assembled with the assembly hole of the frame to form the webbing passage.

5. a top of the webbing connection portion has an abutment surface that extends to a lower portion of the perforation, and a position regulating post is formed on the abutment surface of the webbing connection portion, protruding toward the frame and having a pitch between it and the abutment surface, 5. The webbing height adjuster according to claim 4, wherein the elastic member is an arc-shaped elastic sheet having a low center and both end portions that curve upward, the center portion of which is located between the abutment surface of the webbing connection portion and the position regulating post, and the both end portions of which abut against the bottom portions of the end plates of the slider.

6. the cover includes a back plate located outside the second side of the main body and in contact with 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.

7. The webbing height adjuster according to claim 6, characterized in that the cover has side walls on both sides of the back plate and the end plate, the outer surfaces of which form anti-slip surfaces, and the back plate of the cover has an accommodating groove into which the side plate of the slider can enter.

8. The webbing height adjuster according to claim 6, 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.

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

10. 10. The webbing height adjusting device according to claim 9, wherein an operation space and two abutments are formed inside the upper section of the cover, each abutting on either side below the operation space, a webbing abutment at an upper end of the main body is movable up and down in the operation space of the cover, the abutment is located below the webbing abutment, and when the cover is pulled up, the abutment is pressed against the webbing abutment of the main body to move the main body and the slider relatively, and the main body and the slider are moved relatively by operating the cover to abut against the slider downward.

11. Opposing sides of the main body are defined as a first side and a second side, and the webbing shoulder portion of the main webbing and the auxiliary webbing each enter the first side of the main body and pass through from 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, 11. The webbing height adjustment device according to claim 10, wherein the slider includes end plates, side plates, and inter-plate connection portions, the end plates and the side plates are arranged in parallel at a pitch and are located on a first side and a second side of the main body, the inter-plate connection portion is formed between the end plates and the side plates so as to pass through the movement space of the main body, the diagonal groove is provided at the inter-plate connection portion and penetrates vertically along a diagonal direction from one end of the end plate adjacent to the webbing abutting portion to one end of the side plate adjacent to the webbing abutting portion, a top end of the side plate is higher than the top end of the end plate and an upper groove opening of the diagonal groove, and one end of the end plate adjacent to the diagonal groove has a clamping surface that can clamp the auxiliary webbing together with the webbing contact end of the webbing abutting portion.

12. 12. The webbing height adjusting device of claim 11, wherein the frame is formed with a perforation and an assembly hole located below the perforation, the perforation and the assembly hole extend from the webbing abutment portion molded in an upper section of the frame to an upper end of the perforation, the movement space is formed between the perforation and the webbing abutment portion, the webbing connection portion is molded to cover the lower section of the frame, and the webbing connection portion is assembled with the assembly hole of the frame to form the main webbing passage.

13. 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, the position regulating pillar protruding toward the frame and having a pitch between it and the abutment surface, 13. The webbing height adjusting device according to claim 12, wherein the elastic member is an arc-shaped elastic sheet having a low center and both end portions that curve upward, the center portion of which is located between the abutment surface of the webbing connection portion and the position regulating post, and the both end portions of which abut against the bottom portions of the end plates of the slider.

14. 14. The webbing height adjustment device according to claim 11, wherein the cover includes a back plate located outside the second side of the main body and in contact with 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.

15. The webbing height adjusting device according to claim 14, characterized in that the cover has side walls on both sides of the back plate and the end plate, the outer peripheral surfaces of which form anti-slip surfaces, and the back plate of the cover has an accommodation groove formed therein into which the side plate of the slider can enter.

16. 15. The webbing height adjustment device according to claim 14, wherein the cover has a bridge portion formed on the outer plate such that a space is formed between the bridge portion and the outer plate, thereby allowing the main webbing to pass through the space between the bridge portion and the outer plate and further pass through a main webbing passage of the main body.

Images