Protective reinforcement device for vehicle multipoint seat belt systems

Abstract

To provide a protection reinforcing device of a multi-point seat belt system for a vehicle.SOLUTION: A first belt buckle 21 and a second belt buckle 22 of a buckle unit 20 are movably connected to curved guiding sections of a buckle connection 11 of two webbing adjustment buckles 10, respectively. The first webbing buckle 21 and the second webbing buckle 22 are engaged with each other and transversally connected between two webbings 2 to achieve a reinforcement action, thereby, a protection reinforcing device 1 provide a safety protection effect to a body of a user. When the first belt buckle 21 and the second belt buckle 22 are in an unengaged state, the first belt buckle 21 and the second belt buckle 22 naturally rotate and hang down by gravity at the curved guiding sections of the webbing adjustment buckle 10, so as to be located respectively in front of the webbings 2, thereby, reducing interference with user movements.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a seat belt system, and more particularly to a protective reinforcement device that is applied to multi-point seat belt systems with four or more fixing points in seats of various vehicles, and that improves structural reinforcement and safety. [Background technology]

[0002] Due to the high safety requirements for various vehicles such as off-road vehicles, racing cars, and tanks, the seat belt systems installed on the vehicle seats can be multi-point seat belt systems, including four-point, five-point, six-point, and seven-point systems. The user's body can be simultaneously restrained by the distributed fixing points to be firmly fixed to the seat. When a sudden external force acts on the vehicle, the multi-point seat belt system provides high safety for the user.

[0003] Among the various well-known multi-point seat belt systems applied to vehicle seats, a four-point seat belt system is commonly used. Two webbings connected to a webbing retractor are wound from the top end of the seat back to the left and right sides of the user's body, respectively, to secure the ends of the two webbings to the left and right sides of the seat cushion. The two webbings are then connected to a seat buckle and a tongue plate, which are then engaged with each other. The buckle unit formed by the engagement of the seat buckle and the tongue plate is positioned in front of the user's abdomen, providing high safety protection for the user's body through the four positioning points of the two webbings. Meanwhile, five-, six-, and seven-point seat belt systems are based on the configuration of a four-point seat belt system and further include an auxiliary webbing connected to the buckle unit assembly structure. The cooperation of the two webbings and the auxiliary webbing provides high safety protection for the user's body through more positioning points.

[0004] Multi-point seat belt systems applied to vehicle seats as described above typically provide safety protection by using two webbings connected to a webbing retractor to provide four positioning points on both the left and right sides of the user's body. However, the webbing retractors that provide the winding force for the two webbings are typically located above or behind the seat back, and the buckle units connected between the two webbings are located in front of the user's abdomen. This means that the distance from the connection points of the buckle units, located on the user's abdomen, to the user's shoulders or seat back is long. In the event of an emergency deceleration or stop of the vehicle, the webbing of the webbing retractors wrapped around the user's body on the seat restrains the user on the seat, but the user's upper body could slip through the webbings on both the left and right sides and pass between the two webbings, causing the user to be pushed forward by inertial force. Therefore, the protective performance of such multi-point seat belt systems is insufficient, and further improvement was needed. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] U.S. Patent Application Publication No. 2021 / 0206339 [Patent Document 2] U.S. Patent Application Publication No. 2022 / 0219640 [Patent Document 3] U.S. Patent Application Publication No. 2022 / 0219641

[0006] Furthermore, in the vehicle seat assemblies disclosed in the above Patent Documents 1 to 3, a detachable connecting belt is further provided between the left and right webbings in the multi-point seat belt system of the seat, one end of the connecting belt is connected to a fixed point of one webbing, a buckle member is provided on the other webbing, and the other end of the connecting belt is detachably engaged with the buckle member. According to this configuration, in the event of an emergency deceleration or stop of the vehicle, the connecting belt is provided between the two webbings wrapped around the left and right sides of the body of the user on the seat, thereby limiting the distance between the two webbings, and because the connecting belt is placed horizontally in front of the user's chest, it prevents the upper half of the user's body from slipping off the left and right webbings and being pushed forward between the two webbings due to the action of inertial force.

[0007] The multi-point seat belt system provided in the vehicle seat described above utilizes a detachable connecting belt connected between two left and right webbings to improve the safety of the multi-point seat belt system during use. However, with this configuration, one end of the connecting belt is connected to a fixed point on one webbing, and the other end of the connecting belt can be detachably engaged with a buckle member on the other webbing. However, the height position of the connecting belt cannot be adjusted to suit the body size of different users on the seat. Meanwhile, after the other end of the connecting belt is detached from the buckle member on the other webbing, the one end of the connecting belt is connected to a fixed point on the webbing, so the other end of the connecting belt hangs down. In this case, the connecting belt protrudes to one side of the webbing of the multi-point seat belt system, which can easily interfere with the movements of the user on the seat. Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention aims to provide a protection reinforcement device for a multi-point seat belt system of a vehicle in order to solve problems such as insufficient protection performance and inconvenience during use in conventional multi-point seat belt systems. [Means for solving the problem]

[0009] In order to achieve the above object, the present invention proposes a protection reinforcement device for a multi-point seat belt system of a vehicle, the protection reinforcement device for a multi-point seat belt system of a vehicle being installed in a multi-point seat belt system of a vehicle seat, the multi-point seat belt system being secured by two webbings that are wrapped around both the left and right sides of a user's body on the seat, the protection reinforcement device being connected between the two webbings and including two webbing adjustment buckles and a buckle unit, the two webbing adjustment buckles are attached to the two webbings, respectively, and are capable of adjusting and positioning their height positions on the webbings; a buckle connection portion is provided at each bottom end of the webbing adjustment buckle, the buckle connection portion is located in front of the webbing; and an arc-shaped guide portion is formed on at least one opposing side of the buckle connection portion of the two webbing adjustment buckles attached to the two webbings; the buckle unit is detachably connected between the two webbing adjustment buckles and includes a first belt buckle and a second belt buckle which are engageable and disengageable with each other; a protection reinforcement device for a multi-point seat belt system for a vehicle, characterized in that the first belt buckle and the second belt buckle are dynamically connected to the arc-shaped guide portions of the buckle connection portions of the two webbing adjustment buckles, respectively, so that the protection reinforcement device is connected between the two webbings when the first belt buckle and the second belt buckle are engaged with each other, and when the protection reinforcement device is placed horizontally in front of the user's body and the engagement between the first belt buckle and the second belt buckle is released, the first belt buckle and the second belt buckle naturally rotate and hang down due to gravity from the arc-shaped guide portions of the two webbing adjustment buckles, and are positioned in front of the webbing. [Effects of the Invention]

[0010] According to the overall configuration of the protection reinforcement device for a vehicle multi-point seat belt system, when it is applied to a multi-point seat belt system in a vehicle seat, not only does the two webbings connected to the webbing reel are wound around both the left and right sides of the body of a user on the seat, providing high protection performance, but the protection reinforcement device also provides at least the following effects to the multi-point seat belt system. 1. It is possible to improve auxiliary safety, protection and reinforcement functions for multi-point seat belt systems.

[0010] In other words, in the protective reinforcement device of the present invention, the first and second belt buckles are attached to the left and right webbings of a multipoint seat belt system via two webbing adjustment buckles, and the first and second belt buckles are engaged with each other and connected laterally between the two webbings, thereby providing reinforcement for the two webbings. Furthermore, because the engaged first and second belt buckles are located laterally in front of the user's chest, when the vehicle suddenly decelerates or stops, the webbing retractor takes up the two webbings wrapped around the user's body in the seat, and even if the user is pushed forward by inertial force, the protective reinforcement device limits the distance between the two webbings and is located laterally in front of the user's chest, preventing the user's upper body from slipping through the left and right webbings and being pushed forward between the two webbings. Therefore, the protective reinforcement device of the present invention can reliably provide excellent auxiliary safety, protection, and reinforcement functions in a multipoint seat belt system. 2. It has a height adjustment function. As described above, the protective reinforcement device of the present invention attaches the first belt buckle and the second belt buckle to the left and right webbings of the multi-point seat belt system via two webbing adjustment buckles, respectively, so that the two webbing belt adjustment buckles can be movably positioned on the two webbings, allowing the user to adjust the height positions of the first belt buckle and the second belt buckle on the two webbings to suit their body type, thereby providing excellent supplementary safety and protection at an appropriate position to suit the user's body type. 3. Reduce interference with user behavior. When the protective reinforcement device of the present invention disengages the first and second belt buckles, the first and second belt buckles naturally rotate and hang down from the buckle connection portions of the first and second belt buckles due to gravity, respectively, and are positioned in front of the webbing, thereby reducing interference with the user's movements.

[0011] In the protection and reinforcement device for a vehicle multi-point seat belt system according to the present invention, arc-shaped guide portions are further formed on at least one opposing side of the buckle connection portions of the webbing adjustment buckles attached to the two webbings, and the first and second belt buckles are dynamically connected to the arc-shaped guide portions of the two webbing adjustment buckles, so that they naturally rotate and sag in the arc-shaped guide portions of the webbing due to gravity. Furthermore, the arc-shaped shape of the arc-shaped guide portions reduces interference between the first and second belt buckles when they rotate, allowing them to naturally rotate and sag smoothly.

[0012] In the protection and reinforcement device for a vehicle multi-point seat belt system according to the present invention, a positioning portion is provided for each webbing adjustment buckle, and the positioning portion includes a frame portion and a horizontal rod portion provided within the frame portion, and the webbing is passed flat through the frame portion and wound around the horizontal rod portion, and the top end of the buckle connection portion is connected to the bottom end of the frame portion. This allows the user to easily adjust the height positions of the first and second belt buckles relative to the webbing and maintain the flatness of the webbing.

[0013] The protection and reinforcement device for a vehicle multi-point seat belt system according to the present invention further includes a step between the buckle connection portion and the positioning portion, the buckle connection portion is positioned in front of the webbing and has a pitch between it and the webbing 2, providing an appropriate space for movement for the first and second belt buckles, the buckle connection portion further includes a circular hole, and an arcuate surface is formed on the outer circumferential surface of the lower section of the buckle connection portion. With this configuration, the first and second belt buckles are dynamically connected to the buckle connection portion at the bottom ends of the webbing adjusting buckles of the two webbings, thereby improving the smoothness of rotation of the buckle connection portion and reducing interference between the webbing adjusting buckle and the webbing when they rotate relative to the first and second belt buckles. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a schematic diagram showing an embodiment of a protection reinforcement device of the present invention applied to a four-point seat belt system in a vehicle seat. [Figure 2] 2 is an enlarged partial view showing the state in which the embodiment of the protection reinforcement device of the present invention shown in FIG. 1 is connected between the webbings on both the left and right sides of a four-point seat belt system. [Figure 3] 10 is a schematic diagram showing another embodiment of the protection reinforcement device of the present invention applied to a four-point seat belt system in a vehicle seat. FIG. [Figure 4]1 is a schematic diagram showing an embodiment of a protection reinforcement device of the present invention applied to a five-point seat belt system in a vehicle seat. [Figure 5] 5 is a perspective schematic view of a webbing adjustment buckle in the embodiment of the protection reinforcement device of the present invention shown in FIGS. 1 to 4. FIG. [Figure 6] FIG. 5 is a schematic side view of a webbing adjustment buckle in the embodiment of the protection reinforcement device of the present invention shown in FIGS. [Figure 7] 10 is a schematic plan view of another embodiment of a webbing adjustment buckle in the embodiment of the protection reinforcement device of the present invention. FIG. [Figure 8] 10 is a schematic plan view of another embodiment of a webbing adjustment buckle in the embodiment of the protection reinforcement device of the present invention. FIG. [Figure 9] FIG. 2 is a schematic diagram showing the state in which the first belt buckle and the second belt buckle are disengaged when the embodiment of the protective reinforcement device of the present invention shown in FIG. 1 is applied to a four-point seat belt system in a vehicle seat. DETAILED DESCRIPTION OF THE INVENTION

[0015] 1, 3 and 4 respectively show several embodiments of a protection reinforcement device 1 for a vehicle multi-point seat belt system according to the present invention, where the protection reinforcement device 1 is used for a vehicle multi-point seat belt system, where the multi-point seat belt system shown in Fig. 1 and Fig. 3 is a four-point seat belt system A, and the multi-point seat belt system shown in Fig. 4 is a five-point seat belt system A1. Note that the multi-point seat belt system may be a six-point seat belt system or a seven-point seat belt system, etc., and is not limited to a four-point or five-point seat belt system.

[0016] As shown in Figures 1, 3 and 4, each of the multi-point seat belt systems includes two webbings 2, one or two webbing reels 3, and a seat buckle member 4 or 4A, the two webbings 2 are located on both the left and right sides of the seat, the webbing reels 3 are provided on the upper or underside of the seat backrest or at the rear of the seat backrest, etc., and one end of each of the two webbings 2 is connected to the single webbing reel 3, or one end of each of the two webbings is connected to each of the two webbing reels 3, and the other ends of each of the two webbings 2 are connected to connecting members 5 provided on both the left and right sides of the seat cushion.

[0017] 1 and 9, when the multi-point seat belt system is a four-point seat belt system A, the seat buckle member 4 includes a seat buckle 41 and a tongue plate 42, the seat buckle 41 and the tongue plate 42 are movably attached to the two webbings 2, and the tongue plate 42 is removably engaged so as to be inserted into the seat buckle 41. That is, after a user sits on a vehicle seat, the two webbings 2 are wrapped around the left and right sides of the front of the user's body, respectively, and due to the engagement of the seat buckles 41 and the tongue plate 42 of the two webbings 2, the engaged seat buckle member 4 is positioned in front of the user's abdomen, and the two webbings 2 are wrapped around the user's body and positioned at four positioning points.

[0018] 4 shows a five-point seat belt system A1 or a six-point or seven-point seat belt system in which at least one auxiliary webbing 2A connected to a seat buckle member 4A is further added based on the configuration of the four-point seat belt system A (shown in FIGS. 1 and 3), but the configuration of the seat buckle member 4A is conventional. That is, the seat buckle member 4A includes one seat buckle and two tongue plates, the seat buckle is attached to the auxiliary webbing 2A, and the two tongue plates are movably attached to the two webbings 2A and removably engaged within the seat buckles. As a result, when a user is seated on a vehicle seat, the two webbings 2 are wrapped around the left and right sides of the front of the user's body, respectively, and the two tongue plates of the two webbings 2 engage with the seat buckle, so that the engaged seat buckle member 4A is positioned in front of the user's abdomen, and the two webbings 2 are connected to the auxiliary webbing 2A and wrapped around the user's body, increasing the number of positioning points and improving the safety protection function.

[0019] 1 to 4, the protection reinforcement device 1 of the present invention is connected between the two webbings 2 in the multipoint seat belt system A, A1, and includes two webbing adjustment buckles 10 and one buckle unit 20. The specific configuration thereof will be described in detail below.

[0020] As shown in Figures 1 to 5, the two webbing adjustment buckles 10 are respectively provided on the two webbings 2, and are capable of adjusting their height positions and positioning. A buckle connection portion 11 is provided at each bottom end of the webbing adjustment buckles 10, and the buckle connection portion 11 is located in front of the webbing 2 so as to have a pitch between it and the webbing 2. Also, as shown in Figures 2 and 5, arc-shaped guide portions 111 are formed on at least one opposing side of the buckle connection portions 11 of the two webbing adjustment buckles 10.

[0021] 1 to 5 , in this embodiment, each webbing adjustment buckle 10 includes a positioning portion 12, and the positioning portion 12 includes a frame portion 121 and a horizontal rod portion 122 provided within the frame portion 121, and the width of the interior of the frame portion 121 and the length of the horizontal rod portion 122 match the width of the webbing 2. As a result, the webbing adjustment buckle 10 is attached to the webbing 2 via the positioning portion 12, and the webbing 2 passes flat inside the frame portion 121 and is wound around the horizontal rod portion 122, and the webbing 2 is positioned by the frictional force with the positioning portion 12. With this configuration, when the webbing 2 is released from the positioning portion 12, the webbing adjustment buckle 10 moves along the length direction (up and down direction) of the webbing 2, allowing the height position to be freely adjusted. Preferably, uneven anti-slip portions 123 are formed on both the left and right side surfaces of the frame portion 121, so that the user can grip the frame portion 121 of the positioning portion 12 and adjust the height position of the webbing adjustment buckle 10 in the webbing 2.

[0022] As shown in Figures 5 and 6, the top end of the buckle connection portion 11 is connected to the bottom end of the frame portion 121, and a step is provided between the buckle connection portion 11 and the positioning portion 12, so that the buckle connection portion 11 is located in front of the webbing 2 and there is a pitch between the buckle connection portion 11 and the webbing 2.

[0023] 5, 7 and 8, the buckle connection part 11 is a ring-shaped body with a semicircular or elliptical lower part, and has a circular hole or a compound hole with a semicircular lower half and a rectangular upper half, and an arc-shaped guide part 111 is formed in the lower half of the buckle connection part 11. The above examples merely illustrate some embodiments of the buckle connection part 11, and the present invention is not limited to these.

[0024] 1 to 4 and 9, the buckle unit 20 includes a first belt buckle 21 and a second belt buckle 22 that are detachably engaged with each other, and the first belt buckle 21 and the second belt buckle 22 are dynamically connected to buckle connection portions 11 at the bottom ends of the two webbing adjusting buckles 10, respectively, and the protection reinforcement device 1 of the present invention is connected between the two webbings 2 by the engagement of the first belt buckle 21 and the second belt buckle 22 of the buckle unit 20. Furthermore, as shown in FIG. 9, when the engagement state between the first belt buckle 21 and the second belt buckle 22 is released, the first belt buckle 21 and the second belt buckle 22 naturally rotate and hang down due to gravity from the buckle connection portions 11 at the bottom ends of the webbing adjusting buckles 10, and are positioned in front of the webbing.

[0025] As shown in Figures 1 to 4 and 9, the first belt buckle 21 and the second belt buckle 22 are respectively connected to the arc-shaped guide portions 111 of the two webbing adjusting buckles 10, and naturally rotate and hang down from the arc-shaped guide portions 111 of the two webbing adjusting buckles 10 due to gravity. The arc-shaped configuration of the arc-shaped guide portions 111 reduces interference between the first belt buckle 21 and the second belt buckle 22 when they rotate, thereby improving the smoothness of the first belt buckle 21 and the second belt buckle 22 when they naturally rotate and hang down due to gravity.

[0026] 1, 2, 4 and 9, the first belt buckle 21 has a first connecting belt 211 and a first buckle member 212 connected to one end of the first connecting belt 211, and the other end of the first connecting belt 211 is wound around the buckle connection portion 11 at the bottom end of the webbing adjusting buckle 10, so that the first belt buckle 21 can rotate at the buckle connection portion 11. The second belt buckle 22 has a second connecting belt 221 and a second buckle member 222 connected to one end of the second connecting belt 221, and the other end of the second connecting belt 221 is wound around the buckle connection portion 11 at the bottom end of the other webbing adjusting buckle 10, so that the second belt buckle 22 can rotate at the buckle connection portion 11. The first buckle member 212 and the second buckle member 222 can be male and female buckles that can be engaged with each other, but since these male and female buckles are conventional, a description of their specific configuration will be omitted.

[0027] 1, 2, and 4, in the first belt buckle 21 and the second belt buckle 22, the first connecting belt 211 and the second connecting belt 221 may be belts having a predetermined length, or may be length-adjustable belts provided with a positioning adjustment member. As shown in FIG. 3, one of the first connecting belt 211 and the second connecting belt 221 is provided with a positioning adjustment member 213 to form a length-adjustable belt, and the other is a belt having a predetermined length. Alternatively, one or both of the first connecting belt 211 and the second connecting belt 221 may be length-adjustable belts so that the belt length can be adjusted to suit different body types of users.

[0028] As shown in Figures 1, 2, 4 and 9, when the protection reinforcement device 1 of the present invention is applied to a multi-point seat belt system in a vehicle seat, taking a four-point seat belt system A or a five-point seat belt system A1 as an example, after a user sits on the seat, the two webbings connected to the webbing reel 3 are wound around the left and right sides of the user's body, and the seat buckle 41 connected to the two webbings in the seat buckle members 4, 4A engages with the tongue plate 42, so that the seat buckle members 4, 4A with the engaged seat buckle 41 and tongue plate 42 are positioned in front of the abdomen of the user. When the first belt buckle 21 and the second belt buckle 22 of the protection reinforcement device 1 are engaged with each other and connected laterally between the two webbings, a reinforcing effect is provided between the two webbings.

[0029] In the present invention, the first belt buckle 21 and the second belt buckle 22 of the protection reinforcement device 1 are respectively attached to two webbings via two webbing adjustment buckles 10, and the user can adjust and position the height positions of the two webbing adjustment buckles 10 on the two webbings 2 to suit their body type, so that the first belt buckle 21 and the second belt buckle 22 engage with each other and are connected laterally between the two webbings, and are placed horizontally in front of the user's chest, thereby providing supplementary safety protection for the user. Thus, when the vehicle suddenly decelerates or stops, the webbing reel 3 reels in the two webbings 2 wrapped around the body of the user on the seat, and even if the user on the seat is pushed forward by inertial force, the protection reinforcement device 1 of the present invention is limited in the distance at which it is connected to the two webbings 2 and is placed horizontally in front of the user's chest, so that the upper half of the user's body is prevented from slipping through the webbings 2 on both the left and right sides and being pushed forward between the two webbings 2. Therefore, the protection reinforcement device 1 of the present invention can reliably provide excellent auxiliary safety, protection and reinforcement functions in various multi-point seat belt systems such as the four-point seat belt system A and the five-point seat belt system A1.

[0030] As shown in Figures 1, 2 and 9, when a user on a seat releases the engagement between the first belt buckle 21 and the second belt buckle 22 of the protection reinforcement device 1 of the present invention, the first belt buckle 21 and the second belt buckle 22 are each dynamically connected to the buckle connection parts 11 at the bottom ends of the webbing adjustment buckles 10 of the two webbings 2, and therefore, due to gravity, they naturally rotate and hang down from the buckle connection parts 11 to be positioned in front of the webbing 2, thereby reducing interference with the user's movements.

[0031] In addition, in the protection reinforcement device 1 of the present invention, arc-shaped guide portions 111 are formed on at least one opposing side of the buckle connection portions 11 of the two webbing adjusting buckles 10 provided on the two webbings 2, so that the first belt buckle 21 and the second belt buckle 22 are dynamically connected to the arc-shaped guide portions 111 of the two webbing adjusting buckles 10, respectively, and naturally rotate and hang down from the arc-shaped guide portions 111 due to gravity. In addition, the arc-shaped shape of the arc-shaped guide portions 111 reduces interference between the first belt buckle 21 and the second belt buckle 22 when they rotate, improving the smoothness of the first belt buckle 21 and the second belt buckle 22 when they naturally rotate and hang down due to gravity.

[0032] Furthermore, the protection reinforcement device 1 of the present invention has a step between the buckle connection portion 11 and the positioning portion 12, so that the buckle connection portion 11 is positioned in front of the webbing 2 with a pitch between it and the webbing 2, and provides an appropriate movement space for the first belt buckle 21 and the second belt buckle 22. With this configuration, the first belt buckle 21 and the second belt buckle 22 are dynamically connected to the buckle connection portion 11 at the bottom end of the webbing adjustment buckle 10 of the two webbings 2, which improves the smoothness of rotation of the buckle connection portion 11 and reduces interference between the webbing adjustment buckle 10 and the webbing 2 relative to the first belt buckle 21 and the second belt buckle 22.

[0033] The above description is merely an example of the present invention and does not limit the present invention in any way. Although the present invention has been described using relatively preferred embodiments, this does not limit the present invention, and any simple modifications, equivalent changes and modifications made by anyone skilled in the art to the above embodiments based on the essence of the technology of the present invention, within the scope of the technical solution of the present invention, are all included in the technical solution of the present invention. [Explanation of symbols]

[0034] 1. Protective reinforcement device 10 Webbing adjustment buckle 11 Buckle connection 111 Arc guide section 12 Positioning part 121 Frame section 122 Horizontal rod section 123 Anti-slip part 20 Buckle unit 21 First Belt Buckle 211 First connecting belt 212 First buckle member 213 Positioning adjustment member 22 Second belt buckle 221 Second connecting belt 222 second buckle member A 4-point seat belt system A1 5-point seat belt system 2. Webbing 2A Auxiliary Webbing 3 Webbing reel 4 Seat buckle member 4A Seat buckle member 41 Seat buckle 42 Tongue plate 5. Connecting members

Claims

1. A protection reinforcement device for a multi-point seat belt system of a vehicle, the protection reinforcement device being installed in the multi-point seat belt system of a vehicle seat, the multi-point seat belt system being secured by two webbings wrapped around both the left and right sides of a user's body on the seat, the protection reinforcement device being connected between the two webbings and including two webbing adjustment buckles and a buckle unit; the two webbing adjustment buckles are attached to the two webbings, respectively, and are capable of adjusting and positioning their height positions on the webbings; a buckle connection portion is provided at each bottom end of the webbing adjustment buckle, the buckle connection portion is located in front of the webbing, and an arc-shaped guide portion is formed on at least one opposing side of the buckle connection portion of the two webbing adjustment buckles attached to the two webbings; the buckle unit is detachably connected between the two webbing adjustment buckles and includes a first belt buckle and a second belt buckle which are engageable and disengageable with each other; a protection reinforcement device for a vehicle multi-point seat belt system, characterized in that the first belt buckle and the second belt buckle are dynamically connected to the arc-shaped guide portions of the buckle connection portions of the two webbing adjustment buckles, respectively, so that the protection reinforcement device is connected between the two webbings when the first belt buckle and the second belt buckle are engaged with each other, and when the protection reinforcement device is placed horizontally in front of a user's body and the engagement between the first belt buckle and the second belt buckle is released, the first belt buckle and the second belt buckle naturally rotate and hang down from the arc-shaped guide portions of the two webbing adjustment buckles due to gravity, and are positioned in front of the webbing.

2. 2. The protection and reinforcement device for a vehicle multi-point seat belt system according to claim 1, wherein a positioning portion is provided for each of the webbing adjustment buckles, the positioning portion including a frame portion and a horizontal rod portion provided within the frame portion, the width of the frame portion and the length of the horizontal rod portion being the same as the width of the webbing, whereby the webbing is passed flat through the frame portion and wrapped around the horizontal rod portion, and the top end of the buckle connection portion is connected to the bottom end of the frame portion.

3. 3. The protection reinforcement device for a multi-point seat belt system of a vehicle according to claim 2, wherein a step is provided between the buckle connection portion and the positioning portion, and the buckle connection portion is positioned in front of the webbing so as to have a pitch between the buckle connection portion and the webbing.

4. 3. The protective reinforcement device for a multi-point seat belt system of a vehicle according to claim 2, wherein an anti-slip portion is formed on each of the left and right side surfaces of the frame portion.

5. The first belt buckle has a first connecting belt and a first buckle member connected to one end of the first connecting belt, the other end of the first connecting belt is wound around a buckle connection portion at the bottom end of the webbing adjustment buckle, and the first belt buckle is rotatable at the buckle connection portion; The second belt buckle has a second connecting belt and a second buckle member connected to one end of the second connecting belt, the other end of the second connecting belt is wound around a buckle connection portion at the bottom end of the other webbing adjustment buckle, and the second belt buckle is rotatable at the buckle connection portion; The protection reinforcement device for a multi-point seat belt system of a vehicle according to any one of claims 1 to 4, characterized in that the first belt buckle and the second belt buckle are a male buckle and a female buckle that can be engaged with each other.

6. 6. The protection and reinforcement device for a multi-point seat belt system of a vehicle according to claim 5, wherein the first connecting belt and the second connecting belt are belts having a predetermined length.

7. 6. The protection reinforcement device for a vehicle multi-point seat belt system as described in claim 5, wherein the first connecting belt and the second connecting belt are elongated belts provided with positioning adjustment members having a length adjustment function.

8. 6. The protection reinforcement device for a multi-point seat belt system of a vehicle as described in claim 5, characterized in that one of the first connecting belt and the second connecting belt is a belt having a predetermined length, and the other of the first connecting belt and the second connecting belt is an elongated belt provided with a positioning adjustment member having a length adjustment function.

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