Safety belt shock-absorbing device

Abstract

The present invention relates to a safety belt shock-absorbing device, which, when a shock is applied to a moving body, ensures the function of a retractor and, simultaneously, provides an elastic force corresponding to the physical condition of a wearer to a webbing to which a safety belt is connected, so as to relieve secondary shock that can be applied to the chest and the shoulder by the webbing, and thus can prevent injury to the safety belt wearer. The safety belt, of the present invention, including a tongue (80) connected to a retractor by means of a webbing (82), and a buckle (70) fastened to the tongue (80), can include: an intermediate buckle part (100) to be fastened to the tongue (80); a buckle fastening part (200) which is coupled to the intermediate buckle part (100) and which is to be fastened to the buckle (10); and shock-absorbing parts (300) mounted on both ends of the buckle fastening part (200) so as to absorb the shock applied to the webbing.

Description

Shock absorber for seat belt

[0001] The present invention relates to a shock absorbing device for a seat belt, and more specifically, to a shock absorbing device for a seat belt that secures the function of a retractor when an impact occurs on a moving object, and at the same time provides elasticity corresponding to the physical condition of the wearer to the webbing to which the seat belt is connected, thereby preventing injury to the wearer of the seat belt by absorbing secondary impact that may be applied to the chest and shoulders by the webbing.

[0002] Vehicles carrying people are equipped with seat belts to prevent injuries to drivers and passengers from various external impacts such as collisions.

[0003] Seat belts installed in automobiles play a role in protecting the driver and passengers independently depending on the size of the impact in the event of a collision, but they also play a supplementary role in protecting the driver and passengers more safely when linked with the airbag device.

[0004] A schematic configuration of a conventional seat belt device is shown with reference to FIGS. 10a and 10b. It comprises a buckle (10) fixed to one side of a seat floor panel of a vehicle with a wire fixing ring (14), a retractor on which a webbing (82) fixed to the lower part of a center pillar is wound, a tongue (80) provided to be fastened to the buckle (10) on the webbing (82) unwound from the retractor by a predetermined length, a guide that prevents the webbing from being unwound or twisted, and an anchor that can adjust the height of the belt.

[0005] The above retractor is fixed to the center pillar so that the tongue provided at the end of the webbing can be selectively fastened and released from the buckle in normal times to withdraw the webbing, and is installed built into the floor panel so that it is fixed in the event of a collision.

[0006] In addition, the safety belt is designed to prevent the wearer's body from being thrown forward or in the direction of the accident in the event of a collision by fixing both ends of a webbing having a constant width to the center pillar of the floor panel and positioning the wearer between them, as shown in Fig. 10a.

[0007] However, the seat belt according to the above conventional technology prevents the driver and passenger from being thrown forward and hitting the steering wheel or dashboard of the car in the event of a car accident by pressing the driver and passenger's body against the seat, but there was a problem in that the tension of the webbing was not adjusted, so a considerable secondary impact was applied to the wearer's chest and shoulders supported by the webbing, resulting in injuries to the ribs or collarbone.

[0008] Accordingly, Korean Patent No. 10-1288816 (registration date: July 17, 2013) comprises: a body having one side closed and filled with an expanding fluid inside; a friction member immersed in the expanding fluid through an opening of the body and controlled to move by the expanding fluid when stress is generated in the expanding fluid by contact with the expanding fluid; an elastic member installed between the inside of the body and the friction member to elastically limit the position of the friction member; And a packing that blocks the leakage of the expansion fluid; wherein one side of the body is connected and fixed to one of a buckle and a bracket of a seat belt, and the friction member is connected to one of a bracket, a webbing of a seat belt, and an intermediate means connected to the bracket or the webbing of the seat belt by penetrating an opposite surface to the one side of the body, and the packing is provided on an opposite surface to the one side of the closed body, and a slit is formed so that the friction member is made of an elastic material to enable linear movement through the slit, and the friction member moves in the expansion fluid according to the generation, change, and release of stress applied to the seat belt to adjust the tension applied to the seat belt.

[0009] However, the conventional load adjusting device for a seat belt as described above can alleviate physical pressure caused by the seat belt webbing, but has a problem in that it is inconvenient to use because it cannot adjust the load applied to the webbing to correspond to the physical condition of the wearer.

[0010] In particular, the conventional load adjusting device for seat belts as described above has a problem of low reliability in operation because it cannot absorb impact when the friction member is located at both ends of the body.

[0011] Meanwhile, the conventional seat belt load adjusting device as described above has the problem of increased cost as it must be installed by modifying the seat belt device of a new car that is shipped as a finished vehicle, and because it involves modification of the finished vehicle, it may limit the after-sales service of the finished vehicle manufacturer.

[0012] In particular, there is a problem that buyers of finished vehicles tend to be highly averse to modifications that may affect the interior of the vehicle, and there is a problem that they are reluctant to install load-adjusting devices for conventional seat belts even though they can function as an alternative to secondary impacts.

[0013] The present invention is intended to solve the above-described problem, and has the purpose of providing a shock absorbing device for a seat belt that can prevent injury to a seat belt wearer by absorbing a secondary impact that may be applied to the seat belt wearer without applying any modification to the vehicle being manufactured.

[0014] In addition, the present invention aims to provide a shock absorbing device for a seat belt that can compensate for secondary impact caused by webbing by adjusting elasticity corresponding to the physical condition of the wearer.

[0015] In addition, when the shock absorbing device for a seat belt according to the present invention is incompletely connected or not fastened, it is possible to provide an alarm for non-wearing of the seat belt, thereby enhancing confidence in the state of wearing the seat belt.

[0016] The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned can be more clearly understood from the following description describing preferred embodiments.

[0017] In order to achieve the above object, the shock absorbing device for a seat belt according to the present invention comprises a tongue (80) connected to a retractor by a webbing (82), and a buckle (10) fastened to the tongue (80), wherein the shock absorbing device comprises an intermediate buckle part (100) for fastening to the tongue (80), a buckle fastening part (200) coupled to the intermediate buckle part (100) and fastened to the buckle (10), and a shock absorbing part (300) mounted on both ends of the buckle fastening part (200) for absorbing shock applied to the webbing, wherein the intermediate buckle part (100) comprises a plate-shaped buckle part bracket (120) fastened to a buckle part (70) having a tongue insertion hole (14) provided on one side for fastening to the tongue (80), and the buckle fastening part (200) comprises: A plate-shaped elastic bracket (244) having a tongue (260) for fastening with a buckle (10) joined to the other side thereof may be included, and the shock absorbing portion (300) may be configured to include an elastic spring for providing elastic force to the buckle bracket (120), and an elastic shaft for maintaining an arrangement with the buckle bracket (120) while transmitting the elastic force of the elastic spring to the buckle bracket (120) by penetrating the elastic spring.

[0018] For example, the buckle bracket (120) and the elastic bracket (244) may have bracket holes (122, 248) formed through both ends thereof, the shock absorbing portion (300) may include a hollow spring holder (342) mounted on both ends of the elastic bracket (244) to accommodate the elastic spring, and the elastic shaft may include an elastic adjustment bolt (350) and an elastic adjustment nut (358) whose screw portions are fastened by passing through the bracket holes (122, 248).

[0019] For example, the intermediate buckle part (100) may further include a front release part (132) formed in a plate shape having a certain width and bent on one side to press the release button (72) of the buckle part (70), a rear release part (134) formed on the other side to press the release button (12) of the buckle (10) fastened to the tongue part (260) of the elastic bracket (244), and a double release button (130) having a sliding hole (136) formed in the center in the longitudinal direction, and the double release button (130) may be configured to include a mounting bolt (138) inserted through the sliding hole (136) to be mounted and slidable on the buckle part (70).

[0020] For example, when the double release button (130) is operated to release the buckle (10) of the vehicle after the tongue (260) of the elastic bracket (244) is fastened to it, the elastic bracket (244) may further include a plate spring mounted on the elastic bracket (244) at a position opposite to the release button of the buckle (10) of the vehicle.

[0021] For example, the double release button (130) may be configured to be of a length such that the release button (72) of the buckle portion (70) is operated first and then the release button (12) of the car buckle (10) is operated later, or the release button (12) of the car buckle (10) is operated first and then the release button (72) of the buckle portion (70) is operated later.

[0022] As an example, the elastic spring may include a primary elastic spring (354) accommodated in the spring holder (342) to provide elasticity to the buckle bracket (120), and a secondary elastic spring (390) having an inner diameter larger than an outer diameter of the primary elastic spring (354) and arranged on the outside of the primary elastic spring (354), and a spring bracket (392) fitted to both ends of the secondary elastic spring (390) to block contact with the primary elastic spring (354), and having a spring through-hole (396) formed in the center thereof so that the primary elastic spring (54) may pass through.

[0023] In one embodiment, the elastic bracket (244) includes a pair of elastic frames (410) having elastic bracket slide grooves (412) formed along the longitudinal direction while forming an intermediate buckle receiving portion (480) on the inside with both ends bent and extended to receive the buckle portion (70), and a support frame (416) having an elastic shaft guide groove (418) formed by bending and extending outward from the ends of the elastic frame (410), and the elastic bracket (244) is moved by being fitted into the elastic bracket slide groove (412) formed in the elastic frame (410), and the elastic shaft of the shock absorbing portion (300) may be configured such that one end is connected to the buckle bracket (120) and the other end is inserted into the elastic shaft guide groove (418) formed in the support frame (416).

[0024] In one embodiment, the buckle part (70) comprises a lower frame (140) and an upper frame (150) that are mutually connected to form a tongue receiving portion with one side open so that a tongue (80) can be received inside, an ejector (170) that is pressed against the tongue (80) entering the tongue receiving portion and moves between the lower frame (140) and the upper frame (150), and is connected to a restoring spring (172) so that the tongue (80) can be restored after the contact is released, a latch (195) that is disposed above the upper frame (150) and penetrates the upper frame (150), contacts the ejector (170) to block entry into the tongue receiving portion, and when the ejector (170) is moved by the tongue (80), enters the tongue receiving portion and is fitted inside the tongue to restrain the tongue (80), and A switch housing (190) is mounted on the upper part of the upper frame (150) spaced apart from the latch (195) and equipped with a plate spring on one side for pressing the latch (195) toward the tongue receiving portion, a release button (72) that is slidably mounted on both sides of the lower frame (140) or the upper frame (150) so that the latch (195) inserted through the tongue (80) moves away from the upper frame (150) in a direction so as to be spaced apart from the upper frame (150) so as to restore the ejector (170) during a release operation, and a locking prevention rod (180) that is movably mounted while penetrating the switch housing (190) and receives the elastic force of the spring (192) so that one end is always arranged to be in contact with the release button (72) and the other end is exposed to a certain length by penetrating the elastic bracket (244), and the release button (72) is provided with the The locking prevention bar (180) may be configured to include a distance adjustment wrench (114) for adjusting the length exposed from the elastic bracket (244) through the switch housing (190).

[0025] In one embodiment, the elastic spring may include a primary elastic spring (354) fitted to the elastic shaft, and a secondary elastic spring (390) fitted to the outside of the primary elastic spring (354) and having a length smaller than that of the primary elastic spring (354), and the buckle bracket (120) may include an intermediate buckle connecting end (152) formed to protrude to be fastened with the buckle part (70), and a square plate-shaped elastic bracket fixing plate (160) coupled to the intermediate buckle connecting end (152) so that the buckle bracket (120) does not come off from the elastic bracket slide groove (412) formed in the elastic bracket frame (410) and can move along the elastic bracket slide groove (412).

[0026] As an example, the elastic shaft (520) may further include a rubber hose that accommodates the primary elastic spring (354), and a compression plate (522) may be formed at one end thereof to prevent the elastic spring from coming off, and a protruding catch (524) may be formed on the compression plate (522) so that the buckle bracket (120) is fitted thereto, and the buckle bracket (120) may be configured to have an elastic shaft mounting groove (156) of a predetermined depth formed at both ends thereof so as to be mounted and coupled between the catch (524) formed on the elastic shaft (520).

[0027] As described above, according to the present invention, since the elasticity can be adjusted to fit the physical condition of the wearer, the product can be installed, thereby improving convenience and preference and encouraging the wearing of seat belts.

[0028] Meanwhile, it has the effect of preventing injury to the seat belt wearer by securing the retractor function without any modification to the finished vehicle being shipped and at the same time absorbing secondary impact that may be applied to the wearer.

[0029] In addition, the present invention has the effect of improving the seat belt wearing rate by allowing the product to be produced at a low manufacturing cost with a relatively simple structure.

[0030] In addition, when the shock absorbing device for a seat belt according to the present invention is incompletely connected or not fastened, it can provide an alarm for non-wearing of the seat belt, thereby increasing confidence in the state of wearing the seat belt.

[0031] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

[0032] Figure 1 is a shock absorbing device for a seat belt according to one embodiment of the present invention.

[0033] Figure 2 is an exploded perspective view of a shock absorbing device for a seat belt according to one embodiment of the present invention.

[0034] Fig. 3 is a cross-sectional view of the cut section of line AA of Fig. 1.

[0035] Figures 4a to 4d are cross-sectional views of a shock absorbing portion in a shock absorbing device for a seat belt according to one embodiment of the present invention.

[0036] Figure 5 is a diagram showing a state in which a buckle is fastened in a shock absorbing device for a seat belt according to an embodiment of the present invention.

[0037] Fig. 6 is a cross-sectional view of the cut section of line BB of Fig. 5.

[0038] Figure 7 is a shock absorbing device for a seat belt according to another embodiment of the present invention.

[0039] Figures 8a to 8c show a buckle fastening portion and a shock absorbing portion in a shock absorbing device for a seat belt according to another embodiment of the present invention.

[0040] Figures 9a and 9b show a buckle portion of a shock absorbing device for a seat belt according to another embodiment of the present invention.

[0041] Figures 10a and 10b show a conventional seat belt for an automobile.

[0042] A shock absorbing device for a seat belt according to the present invention will be described in detail with reference to the attached drawings. Various embodiments of the present invention will be described below, but it should be understood that the technical idea of ​​the present invention is not limited thereto and can be modified and implemented in various ways by those skilled in the art. In addition, the terms used in this specification are used to describe the concept of the present invention and embodiments thereof, and are not intended to limit the present invention to the dictionary or phraseological meaning of the terms. For example, the singular expression in this specification may include the plural expression unless the context clearly indicates otherwise. In addition, in this specification, terms such as "comprise" or "have" indicate the presence of a certain structure, step, operation, or combination thereof, and do not exclude the possibility of the presence or addition of other structures, steps, or operations, unless the context clearly indicates otherwise.

[0043] Meanwhile, when adding quotation marks to components of the above drawings, identical components are given the same symbols as much as possible even if they are shown in different drawings, and detailed descriptions of known functions and configurations that may unnecessarily obscure the gist of the present invention are omitted. In addition, directional terms such as 'upper', 'lower', 'front', 'rear', 'leading', 'front', 'rear', etc. are used in relation to the orientation of the disclosed drawing(s). Since the components of the embodiments of the present invention can be positioned in various orientations, directional terms are used for illustrative purposes and not for limitation.

[0044] The present invention is a device that secures the function of a retractor when an impact occurs on a moving object and at the same time provides elasticity corresponding to the physical condition of the wearer to the webbing to which the safety belt is connected, thereby alleviating secondary impact that may be applied to the chest and shoulders by the webbing.

[0045] The present invention can be applied to all mobile devices equipped with a seat belt to protect the wearer, but the following description will be given as an example of application to a seat belt of an automobile. Accordingly, the present invention operates by being connected to a tongue (80) connected to a retractor (82) equipped on an automobile by a webbing, and a buckle (10) connected to the tongue (80).

[0046] FIG. 1 is a shock absorbing device for a seat belt according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a shock absorbing device for a seat belt according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view taken along line AA of FIG. 1.

[0047] A shock absorbing device for a seat belt according to an embodiment of the present invention may be configured to include an intermediate buckle portion (100), a buckle fastening portion (200), and a shock absorbing portion (300), as shown in FIGS. 1 to 3.

[0048] The above intermediate buckle part (100) is connected to the tongue (80), the buckle connection part (200) is coupled to the intermediate buckle part (100) and connected to the buckle (10), and the shock absorbing part (300) is mounted on both ends of the buckle connection part (200) to absorb the shock applied to the webbing (82).

[0049] The above-mentioned intermediate buckle portion (100) is, for example, plate-shaped and includes a buckle portion (70) fastened to one side to be fastened to the tongue (80) and a buckle portion bracket (120) formed by having bracket holes (122) penetrated through both ends.

[0050] The above buckle part (70), as an example, is configured with a release button (72) and a tongue insertion hole (74) on one side, and the other side is configured to be joined to the buckle part bracket (120), and an ejector, a lock plate, a button hook, etc. are configured on the inside (see FIGS. 3 and 6), but since this is a known configuration, a detailed description thereof will be omitted.

[0051] The above buckle fastening part (200) is configured, for example, to be fastened to the buckle (10) by joining an elastic bracket (244) formed in a plate shape to correspond to the buckle bracket (120) and a tongue (260) protruding from the central part of the other side.

[0052] The above elastic bracket (244) is formed with a bracket hole (248) that is connected to the bracket hole (122) formed in the above buckle bracket (120).

[0053] The above shock absorbing part (300) includes, as an example, a spring holder (342) mounted on both ends of the elastic part bracket (244) to provide elastic force to the buckle part bracket (120).

[0054] The spring holder (342) is configured to include an elastic spring accommodated on the inside to provide elasticity, and an elastic shaft that penetrates the elastic spring and is coupled by penetrating the bracket hole (122, 248). Here, the elastic shaft may include an elastic adjustment bolt (350), and an elastic adjustment nut (358) that is coupled to the elastic adjustment bolt (350) on the outside of the buckle bracket (120).

[0055] It is preferable that the above elastic spring and the above elastic adjustment bolt (350) be configured so that the elastic adjustment bolt (350) does not come off to the outside of the spring holder (342) through a separation prevention washer (352).

[0056] Meanwhile, it is preferable that the elastic adjustment bolt (350) is double-fastened with an elastic fixing nut (356) and the elastic adjustment nut (358).

[0057] Figures 4a to 4d are cross-sectional views of a shock absorbing portion of a shock absorbing device for a seat belt according to one embodiment of the present invention.

[0058] The above elastic spring may be configured to include, as an example, a primary elastic spring (354) accommodated inside the spring holder (342) to provide elastic force as shown in FIGS. 4A to 4D, and a secondary elastic spring (390) arranged outside the primary elastic spring (354). Here, the inner diameter of the secondary elastic spring (390) is formed to be larger than the outer diameter of the primary elastic spring (354). Therefore, even if the secondary elastic spring (390) and the primary elastic spring (354) are each compressed or extended, they do not interfere with each other and transmit elastic force to the elastic adjustment bolt (350).

[0059] Meanwhile, the secondary elastic spring (390) can be coupled with a spring bracket (392) arranged at both ends. As shown in FIGS. 4A and 4B, the spring bracket (392) has a cap shape and a spring penetration hole (396) is formed in the center thereof so that the primary elastic spring (350) can pass through it without interference. Here, the inner diameter of the spring bracket (392) is formed to be larger than that of the secondary elastic spring (390) and is coupled to be covered at both ends of the secondary elastic spring (390).

[0060] As an example, the spring bracket may be configured to have a ring-shaped spring mounting hole (398) formed so that the end of the secondary elastic spring (390) is mounted inside, as shown in FIGS. 4c and 4d, thereby preventing interference with the primary elastic spring (354).

[0061] It is preferable that the above primary elastic spring (354) and the above elastic adjustment bolt (350) be configured so that the elastic adjustment bolt (350) does not come off to the outside of the spring holder (342) through a separation prevention washer (352).

[0062] Meanwhile, in the above drawing 2, only the first elastic spring (354) is shown, and the second elastic spring is not shown.

[0063] According to an embodiment of the present invention, a shock absorbing device for a seat belt configured as described above is arranged in a manner in which a buckle bracket (120) and an elastic bracket (244) are in contact with each other, as shown in FIGS. 1 to 4d, and this arrangement is maintained by fastening the elastic adjustment bolt (350) and the elastic adjustment nut (358).

[0064] In addition, the bonding force of the buckle bracket (120) and the elastic bracket (244) can be manipulated by an elastic adjustment nut (358) for adjusting the elastic force of the elastic spring.

[0065] Accordingly, by adjusting the elastic adjustment nut (358) to correspond to the wearer's physical condition, the elastic force provided from the elastic spring (354, 390) can be adjusted. That is, by adjusting the threshold of external force that can cause the buckle bracket (120) and the elastic bracket (244) to separate when an impact accident occurs, the original function of the retractor of an already installed automobile can be secured without causing any problems.

[0066] Fig. 5 is a diagram showing a state in which a buckle is fastened in a shock absorbing device for a seat belt according to an embodiment of the present invention, and Fig. 6 is a cross-sectional view of a cut portion of the BB line of Fig. 5.

[0067] A shock absorbing device for a seat belt according to one embodiment of the present invention may further include a double release button (130) mounted on the buckle portion (70) as shown in FIGS. 5 and 6.

[0068] The above double release button (130) is formed in the shape of a plate having a certain width, and has a front release portion (132) bent on one side to press the release button (72) of the buckle portion (70), and a rear release portion (134) formed on the other side to press the release button (12) of the buckle (10) fastened to the tongue portion (260) formed in the fastening button portion (200), and a sliding hole (136) is formed in the central portion in the longitudinal direction. In addition, a mounting bolt (138) is inserted and fastened into the sliding hole (136) so that the double release button (130) can slide on the buckle portion (70).

[0069] Accordingly, the double release button (130) can simultaneously or sequentially release the release button (72) of the buckle portion (70) and the release button (12) of the automobile buckle (10) fastened to the tongue portion (260). That is, the length of the double release button (130) can be adjusted so that the release button (72) of the buckle portion (70) is operated first and then the release button (12) of the automobile buckle (10) is operated later, or the release button (12) of the automobile buckle (10) is operated first and then the release button (72) of the buckle portion (70) is operated later.

[0070] As an example, a plate spring not shown in the drawing may be further configured on the other side of the elastic bracket (244).

[0071] The above-mentioned plate spring is preferably installed at a position opposite to the release button of the buckle (10) of the vehicle when the tongue (260) of the elastic bracket (244) is fastened to the buckle (10) of the vehicle. Accordingly, when the double release button (130) is operated to release the buckle (10) of the vehicle from the tongue (260) of the elastic bracket (244), the elastic force of the plate spring is provided to the buckle (10) of the vehicle so that a smoother release can be achieved.

[0072] The operation of a shock absorbing device for a seat belt according to one embodiment of the present invention will be described with reference to FIGS. 1 to 6.

[0073] The present invention is fastened to the buckle (10) of a vehicle, as illustrated in the above-described Figure 5. That is, the tongue (260) formed on the elastic bracket (244) is fastened to the buckle (10) of the vehicle, thereby joining the vehicle. Then, the person wearing the seat belt fastens the tongue (80) of the vehicle to the buckle (70) to wear the seat belt in the same manner as before.

[0074] Here, the buckle (10) of the vehicle is fixed to the seat floor panel of the vehicle through a wire fixing ring (14). In addition, the buckle (10) of the vehicle is fastened to a tongue (80) that is stretched over a webbing (82) wound around a retractor mounted on the inside of the center pillar.

[0075] The above webbing (82), as illustrated in Fig. 10a, is a fabric portion that wraps around the body and is commonly referred to as a belt, and is made of synthetic fibers such as nylon or polyester. When the seat belt is a three-point type, this webbing supports the wearer's shoulders and chest, stably restraining the body and thus protecting the wearer's body.

[0076] The above retractor serves to pull and fix the webbing, and provides a length of webbing that fits the wearer's body shape. At the same time, when stress is applied to the webbing due to sudden braking or impact of the vehicle, it detects this and limits the loosening of the webbing.

[0077] As described above, the present invention is used by fastening a tongue (260) formed on an elastic bracket (244) to a buckle (10) of an automobile.

[0078] Here, the buckle bracket (120) and the elastic bracket (244) are fastened with the elastic adjustment bolt (350) and the elastic adjustment nut (358) to maintain a constant arrangement state by the elastic force of the elastic spring. The arrangement state of the buckle bracket (120) and the elastic bracket (244) is maintained until a certain amount of external force is applied to the buckle bracket (120), and the buckle bracket (120) and the elastic bracket (244) are separated only when an external force exceeding the elastic force provided by the elastic spring (354, 390) is applied.

[0079] Here, the elastic bracket (244) and the buckle bracket (120) are maintained in a position by fastening the elastic adjustment bolt (350) and the elastic adjustment nut (358) as described above.

[0080] Therefore, in the event of a car accident, the wearer's body is prevented from being thrown forward or in the direction of the accident by the car's retractor. In other words, the function of the retractor that is already installed is secured.

[0081] Meanwhile, when the above impact accident occurs, if an external force exceeding the elastic force provided by the elastic spring (354, 390) acts on the webbing, the buckle bracket (120) and the elastic bracket (244) are separated from each other and absorb the external force.

[0082] Accordingly, the present invention prevents injuries that may be inflicted on the wearer by absorbing the impact on the chest or shoulder area of ​​the wearer as the buckle bracket (120) is separated from the elastic bracket (244).

[0083] Meanwhile, the elastic force for separating the buckle bracket (120) and the elastic bracket (244) can be appropriately adjusted according to the wearer's physical condition by tightening or loosening the elastic adjustment nut (358) in the elastic adjustment bolt (350).

[0084] In one embodiment of the present invention, the release of the shock absorbing device for a seat belt can be performed by pressing the release button (72) of the buckle portion (70) to release the tongue (80) of the vehicle, and by pressing the release button (12) of the buckle (10) of the vehicle to release the shock absorbing device for a seat belt according to the present invention. Here, the release button of the buckle portion (70) and the release button of the buckle (10) of the vehicle may be performed regardless of the order.

[0085] Meanwhile, in the case where the shock absorbing device for a seat belt according to an embodiment of the present invention further includes the double release button (130), when the shock absorbing device for a seat belt according to the present invention is fastened to the buckle (10) of the vehicle as shown in FIGS. 5 and 6, the front release portion (132) formed on one side of the double release button (130) is positioned adjacent to the release button (72) of the buckle portion (70), and the rear release portion (134) formed on the other side is positioned adjacent to the release button (12) of the vehicle buckle (10).

[0086] Accordingly, when the above double release button (130) is slid and pressed through the mounting bolt (138) and sliding hole (136) fastened to the buckle part (70), the tongue (80) of the car fastened to the buckle part (70) and the buckle (10) of the car fastened to the tongue part (260) of the elastic bracket (244) are simultaneously released.

[0087] FIG. 7 is a shock absorbing device for a seat belt according to another embodiment of the present invention, FIGS. 8a to 8c are a buckle fastening portion and a shock absorbing portion in a shock absorbing device for a seat belt according to another embodiment of the present invention, and FIGS. 9a and 9b are a buckle portion in a shock absorbing device for a seat belt according to another embodiment of the present invention.

[0088] A shock absorbing device for a seat belt according to another embodiment of the present invention may be configured to include an intermediate buckle portion (100), a buckle fastening portion (200), a shock absorbing portion (300), and a case, as shown in FIGS. 7 to 9b.

[0089] The above intermediate buckle part (100) is connected to the tongue (80), the buckle connection part (200) is coupled to the intermediate buckle part (100) and connected to the buckle (10), and the shock absorbing part (300) is mounted on both ends of the buckle connection part (200) to absorb the shock applied to the webbing.

[0090] The above intermediate buckle portion (100), in another embodiment, is plate-shaped and includes a buckle portion bracket (120) to which a buckle portion (70) for fastening to the tongue (80) is fastened on one side.

[0091] The buckle fastening part (200) may, in another embodiment, be configured to include an elastic bracket (244) having a plate shape and a tongue (260) for fastening with the buckle (10) joined to the other side thereof, a pair of elastic frames (410) in which both ends of the elastic bracket (244) are bent and extended to form an intermediate buckle receiving part (480) on the inside to receive the buckle part (70) and an elastic bracket slide groove (412) formed therethrough along the longitudinal direction, and a support frame (416) in which an elastic shaft guide groove (418) is formed by bending and extending outward from the end of the elastic frame (410).

[0092] Here, the buckle bracket (120) is moved by being inserted into the elastic bracket slide home (412) formed in the elastic frame (210).

[0093] Accordingly, the tongue (260) mounted on the elastic frame (210) is connected to the buckle (10) pre-mounted on the vehicle, and is connected to the tongue (80) pre-mounted on the vehicle and the buckle (70) mounted on the buckle bracket (120) to operate.

[0094] The above shock absorbing part (300), as another embodiment, is configured to include an elastic spring for providing elastic force to the buckle bracket (120), and an elastic shaft that is arranged to penetrate the elastic spring and transmit the elastic force of the elastic spring to the buckle bracket (120) while maintaining the arrangement with the buckle bracket (120).

[0095] Here, the elastic shaft (520) of the shock absorbing part (300) includes a cylindrical elastic shaft (520) whose one end is connected to the buckle bracket (120) and whose other end is inserted into the elastic shaft guide groove (418) formed in the support frame (416), and an elastic spring fitted into the elastic shaft (520) to provide elasticity to the buckle bracket (120).

[0096] The above elastic springs may be configured as one each to be fitted into the elastic shaft (520), but in the present invention, they are configured to include a primary elastic spring (354) fitted into the elastic shaft (520), and a secondary elastic spring (390) fitted to the outside of the primary elastic spring (354) and having a length smaller than that of the primary elastic spring (354). Accordingly, the elastic springs can provide elastic force by the primary elastic spring (354) to the buckle bracket (120) in response to an external force applied to the buckle bracket (120), or provide elastic force by the primary elastic spring (354) and the secondary elastic spring (390) to the buckle bracket (120), respectively.

[0097] Meanwhile, it is preferable to arrange a rubber hose that accommodates the primary elastic spring (354) so ​​that the primary elastic spring (354) and the secondary elastic spring (390) can be stretched without interfering with each other.

[0098] It is preferable that the elastic shaft (520) is formed with a compression plate (522) at one end to prevent the elastic spring from coming off, and that a protruding catch (524) is formed on the compression plate (522) so that the buckle bracket (120) is fitted therein.

[0099] In another embodiment, the above buckle bracket (120) preferably has an elastic shaft mounting groove (156) of a certain depth formed between the hooks (524) formed on the elastic shaft (520) at both ends to be mounted and coupled, and it is preferable that the intermediate buckle connecting end (152) for being fastened with the buckle portion (70) accommodated in the intermediate buckle receiving portion (480) is formed to protrude.

[0100] Meanwhile, a square plate-shaped buckle bracket fixing plate (160) is fastened to the intermediate buckle connecting section (152) so that the buckle bracket (120) does not come off from the buckle bracket slide groove (412) formed in the elastic frame (410) and can move along the buckle bracket slide groove (412). That is, the thickness of the buckle bracket fixing plate (160) is formed so that the sum of the thickness of the buckle bracket (120) and the thickness of the buckle bracket (120) is greater than the width of the buckle bracket slide groove (412), thereby preventing the buckle bracket (120) from coming off from the buckle bracket slide groove (412).

[0101] Here, the buckle bracket fixing plate (160) is fastened to the intermediate buckle connection end (152) with a fixing bolt (162), and a fixing hole (164) and a fastening hole (154) are formed to penetrate through the buckle bracket fixing plate (160) and the intermediate buckle connection end (152), respectively. In addition, the fixing bolt (162) may be fastened with a nut (not shown).

[0102] Accordingly, when an external force acts on the intermediate buckle part (100), the external force is transmitted to the buckle bracket (120) connected to the intermediate buckle part (100), and the buckle bracket (120) moves along the buckle bracket slide groove (412) formed in the elastic part frame (410), and the buckle bracket (120) that moves absorbs the external force in response to the elastic force of the primary elastic spring (354) to the secondary elastic spring (390) configured in the shock absorbing part (300), respectively.

[0103] The above intermediate buckle part (100) is a device for fastening to a tongue (80) pre-mounted on a vehicle, and is configured to include a lower frame (140), an upper frame (150), an ejector (170), a latch (195), a release button (72), and a switch housing (190), as shown in FIGS. 9a and 9b.

[0104] The present invention configures a fastening prevention bar (180) in the intermediate buckle portion (100) so that when the tongue (80) of the vehicle is not fastened to the shock absorbing device for a seat belt according to another embodiment of the present invention, it restricts fastening to the buckle (10) of the vehicle, thereby making it possible to reliably wear the seat belt.

[0105] The lower frame (140), upper frame (150), ejector (170), latch (195), release button (72), and switch housing (190) that constitute the above intermediate buckle portion (100) are known in the art, so their general configuration and operation will be described.

[0106] The lower frame (140) and upper frame (150) are mutually coupled to form a tongue receiving portion (22) with one side open so that a tongue (80) can be received inside. In addition, a through hole (142) is formed on the other side so that it can be fastened to the buckle bracket (120).

[0107] The above ejector (170) is moved between the lower frame (140) and the upper frame (150) by being pressed by the tongue (80) entering the tongue receiving portion, and is connected to a restoration spring (172) so as to be restorable when it is released from contact with the tongue (80).

[0108] The above latch (195) is positioned above the upper frame (150) and penetrates the upper frame (150). Here, the latch (195) comes into contact with the ejector (170) to block its entry into the tongue receiving portion, and when the ejector (170) is moved by the tongue (80), it enters the tongue receiving portion and is fitted into the inside of the tongue to restrain the tongue.

[0109] The above switch housing (190) is mounted on the upper part of the upper frame (150) at a distance from the latch (105), and a plate spring is mounted on one side to press the latch (195) toward the tongue receiving portion.

[0110] The above release button (72) is slidably mounted on both sides of the lower frame (140) or the upper frame (150), and is connected to a restoration spring so that the latch (195) penetrating the tongue moves away from the upper frame (150) so that the ejector (170) can be restored when the release operation is performed.

[0111] Meanwhile, the switch housing (190) is equipped with a fastening detection unit (not shown) that generates an electrical signal to indicate that the tongue is fastened or fastened to the tongue receiving portion by pressing or releasing the ejector (170) that moves within the tongue receiving portion.

[0112] The above-described fastening prevention rod (180) is movably mounted on the switch housing (190) and is always positioned to contact the release button (72) due to the elastic force of the spring (192). Here, the release button (72) is provided with a distance adjusting wrench (114) for adjusting the distance from the fastening prevention rod (180). Meanwhile, a through hole (462) is formed in the elastic bracket (244) on which the tongue (260) is mounted so that the fastening prevention rod (180) can pass therethrough and move. Therefore, by adjusting the distance adjusting wrench (114), the length at which the fastening prevention rod (180) is exposed from the elastic bracket (244) through the switch housing (190) can be adjusted.

[0113] The above case (not shown) can be formed in various shapes, but it is preferable to form it so as to have an aesthetic appearance while covering the shock absorbing portion (300) and the intermediate buckle portion (100).

[0114] The operation of a shock absorbing device for a seat belt according to another embodiment of the present invention configured as described above will be examined with reference to FIGS. 7 to 9b.

[0115] First, a shock absorbing device for a seat belt according to another embodiment of the present invention is fastened to the tongue (80) of the vehicle. That is, the tongue (80) of the vehicle is fastened to the buckle portion (70).

[0116] After that, the tongue (260) of the shock absorber for the seat belt is inserted into the buckle (10) of the car to complete the fastening.

[0117] Here, the shock absorbing device for a seat belt according to another embodiment of the present invention cannot be fastened to the buckle (10) of the vehicle without fastening the tongue (80) of the vehicle.

[0118] When the tongue (80) of the vehicle is not fastened, the latch (195) of the intermediate buckle portion (100) restricts movement by pressing the release button (72) and thereby restricts movement of the fastening prevention bar (180). Therefore, when the tongue portion (260) is fastened to the buckle (10) of the vehicle when the tongue (80) is not fastened, the fastening prevention bar (180) presses the release button of the buckle (10) to prevent fastening to the tongue portion (260).

[0119] Meanwhile, a shock absorbing device for a seat belt according to another embodiment of the present invention has a structural feature in which a buckle portion (70) is arranged in an intermediate buckle portion (100), and shock absorbing portions (300) are arranged on both sides of the intermediate buckle portion (100), thereby being configured with a minimum space.

[0120] This structural feature has the advantage of being very easy to use on the seat belts of the front or rear seats of a typical automobile. That is, the movement of the buckle is inevitably limited in the rear seats of a typical automobile. In other words, since the buckle is installed so as to be exposed between the seat and back of the rear seat, the movement of the buckle is limited. However, the shock absorbing device for a seat belt according to another embodiment of the present invention has a small volume and a structure in which the tongue portion (260) protrudes in the same manner as the tongue (80) of the automobile, so that it can be used very easily and quickly without inconvenience even in the rear seats of an automobile.

[0121] Meanwhile, in another embodiment of the present invention, the release of the shock absorbing device for a seat belt can be achieved by simultaneously releasing the tongue (80) and the tongue portion (260) of the vehicle by pressing the release button (72) of the intermediate buckle portion (100), thereby detaching the shock absorbing device for a seat belt of the present invention. That is, when the release button (72) is pressed, the fastening prevention bar (180) in contact therewith is also pressed simultaneously, thereby operating the release button of the buckle (10) of the vehicle, thereby simultaneously releasing the fastening of the tongue (80) and the tongue portion (260) of the vehicle.

[0122] As described above, the wearer can easily and conveniently install and use the shock absorbing device for a seat belt according to the present invention on the buckle (10) of the vehicle without making any modifications to the existing vehicle.

[0123] The embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical concept of the present invention. The scope of protection of the present invention is limited only by the matters set forth in the claims, and those skilled in the art will be able to make various improvements and modifications to the technical concept of the present invention. Accordingly, such improvements and modifications, if obvious to those skilled in the art, will fall within the scope of protection of the present invention.

Claims

1. A safety belt including a tongue (80) connected to a retractor by a webbing (82) and a buckle (10) fastened to the tongue (80), It includes an intermediate buckle part (100) to be fastened with the tongue (80), a buckle fastening part (200) coupled to the intermediate buckle part (100) and fastened with the buckle (10), and a shock absorbing part (300) mounted on both ends of the buckle fastening part (200) to absorb the shock applied to the webbing. The above intermediate buckle part (100) includes a plate-shaped buckle part bracket (120) that is connected to a buckle part (70) having a tongue insertion hole (14) on one side for connecting to the tongue (80). The above buckle fastening part (200) includes a plate-shaped elastic bracket (244) with a tongue (260) for fastening to the buckle (10) attached to the other side, The shock absorbing part (300) is a shock absorbing device for a seat belt, which includes an elastic spring for providing elasticity to the buckle bracket (120), and an elastic shaft that is disposed through the elastic spring to transmit the elasticity of the elastic spring to the buckle bracket (120) while maintaining the arrangement with the buckle bracket (120).

2. In claim 1, The above buckle bracket (120) and the elastic bracket (244) have bracket holes (122, 248) formed through both ends, The above shock absorbing part (300) is mounted on both ends of the elastic part bracket (244) and includes a hollow spring holder (342) for accommodating the elastic spring. The above elastic axis is a shock absorbing device for a seat belt, including an elastic adjustment bolt (350) and an elastic adjustment nut (358) that are fastened by having a screw portion passing through the bracket hole (122, 248).

3. In claim 1 or claim 2, The above-mentioned intermediate buckle part (100) further includes a front release part (132) that is formed in a plate shape with a certain width and is bent on one side to be able to press the release button (72) of the buckle part (70), a rear release part (134) that is formed on the other side to be able to press the release button (12) of the buckle (10) that is fastened to the tongue part (260) of the elastic bracket (244), and a double release button (130) that has a sliding hole (136) formed in the central part in the longitudinal direction. The above double release button (130) is a shock absorbing device for a seat belt, which includes a mounting bolt (138) that is inserted so as to be mounted and slidable in the buckle portion (70) through the sliding hole (136).

4. In claim 3, A shock absorbing device for a seat belt, further comprising a plate spring mounted on the elastic bracket (244) at a position opposite to the release button of the buckle (10) of the vehicle when the double release button (130) is operated to release the buckle (10) of the vehicle after the tongue (260) of the elastic bracket (244) is fastened to the buckle (10) of the vehicle.

5. In claim 3, The above double release button (130) is formed to a length such that the release button (72) of the buckle part (70) is operated first and then the release button (12) of the automobile buckle (10) is operated later, or the release button (12) of the automobile buckle (10) is operated first and then the release button (72) of the buckle part (70) is operated later. A shock absorbing device for a seat belt.

6. In claim 2, The above elastic spring includes a primary elastic spring (354) accommodated in the spring holder (342) to provide elasticity to the buckle bracket (120), and a secondary elastic spring (390) having an inner diameter larger than the outer diameter of the primary elastic spring (354) and arranged on the outside of the primary elastic spring (354). A multi-stage shock absorbing device for a seat belt, comprising a spring bracket (392) fitted to both ends of the secondary elastic spring (390) to block contact with the primary elastic spring (354) and having a spring penetration hole (396) formed in the center thereof so that the primary elastic spring (54) passes through.

7. In claim 1, The above elastic bracket (244) includes a pair of elastic frames (410) having an elastic bracket slide groove (412) formed along the longitudinal direction while forming an intermediate buckle receiving portion (480) on the inside by bending and extending at both ends to receive the buckle portion (70), and a support frame (416) having an elastic shaft guide groove (418) formed by bending and extending outward from the end of the elastic frame (410) and passing through it. The above elastic bracket (244) is moved by being inserted into the elastic bracket slide home (412) formed in the elastic frame (410). A shock absorbing device for a seat belt, wherein the elastic axis of the shock absorbing part (300) is connected at one end to the buckle bracket (120) and the other end is inserted into the elastic axis guide groove (418) formed in the support frame (416).

8. In claim 7, The above buckle part (70) is formed by a lower frame (140) and an upper frame (150) that are mutually connected to form a tongue receiving part with one side open so that a tongue (80) can be received inside. An ejector (170) that is moved between the lower frame (140) and the upper frame (150) by applying pressure to the tongue (80) entering the tongue receiving portion, and is connected to a restoration spring (172) so that the tongue (80) can be restored after release from contact, A latch (195) which is positioned above the upper frame (150) and penetrates the upper frame (150), comes into contact with the ejector (170) to block entry into the tongue receiving portion, and when the ejector (170) is moved by the tongue (80), enters the tongue receiving portion and is fitted into the inside of the tongue to restrain the tongue (80); A switch housing (190) that is mounted on the upper part of the upper frame (150) at a distance from the latch (195) and has a plate spring mounted on one side that presses the latch (195) toward the tongue receiving portion, A release button (72) connected to a restoration spring so that the latch (195) inserted through the tongue (80) moves away from the upper frame (150) so that the ejector (170) can be restored when the release operation is performed, and which is slidably mounted on the lower frame (140) or the upper frame (150) on both sides, It includes a fastening prevention rod (180) that is movably mounted while penetrating the switch housing (190), and is provided with elastic force of a spring (192) so that one end is always placed in contact with the release button (72), and the other end is exposed to a certain length by penetrating the elastic bracket (244). A shock absorbing device for a seat belt, wherein the release button (72) includes a distance adjusting wrench (114) for adjusting the length of the fastening prevention rod (180) exposed from the elastic bracket (244) through the switch housing (190).

9. In claim 7, The above elastic spring includes a primary elastic spring (354) fitted to the elastic shaft, and a secondary elastic spring (390) fitted to the outside of the primary elastic spring (354) and having a length smaller than that of the primary elastic spring (354). The buckle bracket (120) is a shock absorbing device for a seat belt, comprising a middle buckle connecting end (152) formed to protrude and be fastened to the buckle part (70), and a square plate-shaped elastic bracket fixing plate (160) that is coupled to the middle buckle connecting end (152) so that the buckle bracket (120) can move along the elastic bracket slide groove (412) formed in the elastic frame (410) without being detached from the elastic bracket slide groove (412).

10. In claim 9, It further includes a rubber hose that accommodates the above primary elastic spring (354), The elastic shaft (520) has a compression plate (522) formed at one end to prevent the elastic spring from detaching, and a protruding catch (524) is formed on the compression plate (522) so that the buckle bracket (120) is fitted therein. The above buckle bracket (120) is a shock absorbing device for a seat belt, in which an elastic shaft mounting groove (156) of a certain depth is formed to be mounted and coupled between the hooks (524) formed on the elastic shaft (520) at both ends.

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