KR102453368B1 - Seat buckle presenter assembly - Google Patents

Abstract

The present invention relates to a seat belt buckle presenter assembly, and more particularly, to a seat belt buckle presenter assembly capable of performing a pretension function for a seat belt buckle in a crisis situation.
The seat belt buckle presenter assembly according to the present invention includes a buckle part, a pretensioner connected to the buckle part through a wire, a pretensioner having a gas generating device to pull the wire by the explosion of the gas generating device, and a rotatable connection to the pretensioner along the rail part A movable moving part, a motor part applying a rotational force to the rail part, a rail part reciprocating the moving part by the rotational force from the motor part, and a locking part rotating together according to the rotation of the pretensioner so that the moving part is locked to the rail part be prepared

Description

Seat Belt Buckle Presenter Assembly {SEAT BUCKLE PRESENTER ASSEMBLY}

The present invention relates to a seat belt buckle presenter assembly, and more particularly, to a seat belt buckle presenter assembly capable of performing a pretension function for a seat belt buckle in a crisis situation.

It is known to provide a seat belt restraint system in a vehicle for restraining an occupant to the seat of the vehicle. In most vehicles, the seat belt restraint system can be formed of a waist belt and a shoulder belt. Typically, the waist belt and shoulder belt are made of one continuous length of belt webbing and have a tongue or latch plate for insertion into the buckle. The tongue may be slidably attached on such belt webbing, and is often slidably attached. When the buckle and tongue are buckled together, the seat belt restraint system restrains the occupant's movement to help protect the occupant during a crash.

Typically, the webbing or anchor cable for the buckle of the seat restraint system is secured to the seat or vehicle structure. In addition, in general, the buckle is mostly located in an uncomfortable position facing the rear of the seat cushion, and as a result, a person sitting on the seat has to find the whereabouts of the buckle in order to engage the buckle and the tongue. It would be desirable to have a system that can easily locate a buckle for a seat restraint system.

A number of devices have been developed to facilitate connection or engagement of a tongue to a buckle. These devices are often referred to as buckle presenter assemblies.

In some of the prior art, most buckle presenters rely on pivotable rotation of the buckle from a stowed position near the level of the seat to a level that projects beyond the seat. These systems do little to secure the tongue to the buckle as the occupant's body is still obscured during fastening.

In US Pat. No. 6,550,867, an assembly comprising a gear nut and a jackscrew provides longitudinal movement of the buckle between a forward position and a rear position. In such an assembly, the buckle presenter can be accessed more easily. The assembly is fixedly attached to the seat track of the seat.

Similarly, US Pat. No. 8,157,292 uses a rotating screw to move the buckle longitudinally, but further includes a pivoting buckle head to facilitate engagement and disengagement of the tongue and buckle.

In these devices, when the seat belt is subjected to a heavy load, the rotating screw is exposed to a large load or force that is likely to cause damage. This becomes a problem or a source of contention in restraints.

Republic of Korea Patent Publication No. 10-2015-0094629 "Seat Belt Buckle Presenter Assembly"

An object of the present invention is to provide a seat belt buckle presenter assembly having a pre-tension function capable of forcibly constraining a wearer when a dangerous state occurs and a locking function is continuously performed during the operation of the pre-tension function. .

The seat belt buckle presenter assembly according to the present invention includes a buckle part, a pretensioner connected to the buckle part through a wire, a pretensioner having a gas generating device to pull the wire by the explosion of the gas generating device, and a rotatable connection to the pretensioner along the rail part A movable moving part, a motor part applying a rotational force to the rail part, a rail part reciprocating the moving part by the rotational force from the motor part, and a locking part rotating together according to the rotation of the pretensioner so that the moving part is locked to the rail part be prepared

In addition, it is preferable that an elastic member for maintaining a predetermined angle or positional relationship between the pretensioner and the moving part in the unlocked state is provided.

In addition, when the rotational force of the pretensorer is greater than the elastic force of the elastic member, it is preferable that the locking part rotates so that the moving part is locked on the rail part.

In addition, the moving unit includes a connection bracket connected to the pretensioner on the open front of the rail unit, is inserted into the receiving space of the rail unit and is rotatably mounted on the side of the connection bracket, and is linearly reciprocated by the rotational force from the motor unit to the connection bracket. It is preferable to have a carrier for moving the.

In addition, the elastic member is preferably mounted between the connecting bracket and the carrier.

In addition, it is preferable that the locking part is rotatably connected to the carrier in the accommodating space of the rail part, one end of the locking part is connected to the connection bracket and the protruding protrusion, and the other end of the locking part is elastically supported by a restoring spring of the carrier.

In addition, the rail unit includes a receiving case having a rectangular accommodation space formed therein and having at least an open front surface, a plurality of through holes formed at regular intervals on one side of the accommodation case, a belt having a concave-convex portion on the inner surface, and a motor unit. It is preferable to include a pulley base to which each of the first and second pulleys which are rotated by and rotate the belt is rotatably mounted.

In addition, it is preferable that the locking part has a locking part inserted into the through hole, the locking part is spaced apart from the through hole in the unlocking state, and the locking part is inserted into the through hole in the locked state.

In addition, it is preferable that a reduction unit for reducing the rotation speed of the motor unit is provided between the motor unit and the first pulley.

In addition, the carrier is inserted into the belt, and it is preferable that the lower surface of the carrier has an uneven portion engaged with the uneven portion of the belt.

The present invention has a pre-tension function that can forcefully restrain the wearer when a dangerous state occurs, and the locking function is performed by rotation due to the reaction caused by the explosion in the pre-tension, thereby improving safety for the wearer there is also

In addition, the present invention has an effect of performing a pretension function and a locking function with a lightweight structure with a small number of overall parts, and particularly, when the wearer moves forward due to inertia, such as in a vehicle collision, the seat belt buckle For the sub-marine phenomenon that may occur because the presenter assembly is also moved forward and the seat belt is loosened, the seat belt buckle presenter assembly is fixed in the current position without moving due to the locking function, thereby preventing the sub-marine phenomenon there is also

1 is a perspective view of a seat belt buckle presenter assembly according to the present invention;
FIG. 2 is an exploded perspective view of the pretensioner of FIG. 1 .
3 is an operation state diagram of the pretensioner of FIG. 2 .
4 is an exploded perspective view of the seat belt buckle presenter assembly of FIG. 1 ;
FIG. 5 is an exploded perspective view in the rear direction of FIG. 4 .
Fig. 6 is a partial cross-sectional view taken along line A-A' of the seat belt buckle presenter assembly of Fig. 1 in an unlocked state;
Fig. 7 is a partial cross-sectional view taken along line A-A' of the seat belt buckle presenter assembly of Fig. 1 in a locked state;

Hereinafter, the present invention will be described in detail through examples and drawings. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that various modifications, equivalents, and/or alternatives of the embodiments of the present invention are included. In connection with the description of the drawings, like reference numerals may be used for like components.

In this document, expressions such as "have", "may have", "includes", or "may include" refer to the presence of a corresponding characteristic (eg, a numerical value, function, operation, or component such as a part). and does not exclude the presence of additional features.

In this document, expressions such as “A or B”, “at least one of A or/and B”, or “one or more of A or/and B” may include all possible combinations of the items listed together. . For example, "A or B", "at least one of A and B", or "at least one of A or B" means (1) includes at least one A, (2) includes at least one B; Or (3) it may refer to all cases including both at least one A and at least one B.

Expressions such as "first", "second", "first", or "second" used in this document may modify various elements, regardless of order and/or importance, and may modify one element to another. It is used only to distinguish it from the components, and does not limit the components. For example, the first user equipment and the second user equipment may represent different user equipment regardless of order or importance. For example, without departing from the scope of rights described in this document, a first component may be referred to as a second component, and similarly, the second component may also be renamed as a first component.

A component (eg, a first component) is "coupled with/to (operatively or communicatively)" to another component (eg, a second component) When referring to "connected to", it should be understood that the certain element may be directly connected to the other element or may be connected through another element (eg, a third element). On the other hand, when it is said that a component (eg, a first component) is "directly connected" or "directly connected" to another component (eg, a second component), the component and the It may be understood that other components (eg, a third component) do not exist between other components.

The expression "configured to (or configured to)" as used in this document, depending on the context, for example, "suitable for", "having the capacity to" It can be used interchangeably with "," "designed to", "adapted to", "made to", or "capable of". The term "configured (or set up to)" may not necessarily mean only "specifically designed to" in hardware. Instead, in some circumstances, the expression “a device configured to” may mean that the device is “capable of” with other devices or parts. For example, the phrase "a processor configured (or configured to perform) A, B, and C" executes a dedicated processor (eg, an embedded processor), or one or more software programs stored in a memory device, to perform the corresponding operations. By doing so, it may mean a generic-purpose processor (eg, a CPU or an application processor) capable of performing corresponding operations.

Terms used in this document are only used to describe specific embodiments, and may not be intended to limit the scope of other embodiments. The singular expression may include the plural expression unless the context clearly dictates otherwise. Terms used herein, including technical or scientific terms, may have the same meanings as commonly understood by one of ordinary skill in the art described in this document. Among the terms used in this document, terms defined in a general dictionary may be interpreted with the same or similar meaning as the meaning in the context of the related art, and unless explicitly defined in this document, have an ideal or excessively formal meaning. not interpreted In some cases, even terms defined in this document cannot be construed to exclude embodiments of this document.

1 is a perspective view of a seat belt buckle presenter assembly according to the present invention, FIG. 2 is an exploded perspective view of the pretensioner of FIG. 1, FIG. 3 is an operation state diagram of the pretensioner of FIG. 2, and FIG. 4 is the seat belt buckle presenter of FIG. An exploded perspective view of the assembly, FIG. 5 is an exploded perspective view in the rear direction of FIG. 4 , FIG. 6 is a partial cross-sectional view taken along line A-A' of the seat belt buckle presenter assembly of FIG. 1 in an unlocked state, and FIG. 7 is a locked view It is a partial cross-sectional view taken along line A-A' of the seat belt buckle presenter assembly of FIG. 1 in the state.

In this specification, the first direction is usually a direction facing the front of the vehicle, the second direction is a direction facing the rear of the vehicle that is 180° opposite to the first direction, and the upper direction is the rail part 300 or the upper side of the vehicle. , the lower direction indicates the lower side of the rail unit 300 or the vehicle, and the longitudinal direction indicates the direction of the long axis of the rail unit 300 .

As shown in FIG. 1 , the seat belt buckle presenter assembly includes a buckle part 100 , a pretensioner 150 connected to the buckle part 100 , and a pretensioner 150 connected to the rail part 300 to be movable along the rail part 300 . The moving unit 200, the rail unit 300 for allowing the moving unit 200 to reciprocate by a predetermined length with the rotational force from the motor unit 400, and the motor unit for applying the rotational force to the rail unit 300 (400).

The buckle part 100 corresponds to a configuration in which the tongue (not shown) of the seat belt is detachable, and is connected to the pretensioner 150 through the wire 110 .

1 to 3, the pretensioner 150 is a gas generating device 158 is mounted on the upper side of the first opening 151a through which the wire 110 enters, and the receiving space through which the wire 110 passes. A base cartridge 151 having a second opening 151b to be formed, a packing 152 for sealing between the wire 110 and the first opening 151a, and a gas generating device 158 connected to the wire 110 ) of the piston 153 moving in the first direction by the explosion, and the piston 153 is inserted therein in communication with the receiving space through the third opening 151c of the base cartridge 151 in a hollow form and at least one The cylinder 154 having the above opening, an O-ring 155 for preventing the gas generated during the explosion of the gas generating device 158 from leaking between the inner surface of the cylinder 154 and the outer surface of the piston 153; A locking ball 156 that prevents the piston 153 from returning to its original position (initial position before the explosion of the gas generating device 158) after the piston 153 is moved in the first direction by the explosion of the gas generating device 158 and , a cap generator 157 that applies an electric signal from a control unit (not shown) to the gas generating device 158 while closing the second opening 151b, and explodes by the electric signal to release the high-pressure gas into the receiving space It is composed of a gas generating device 158 that generates it. In this embodiment, the electrical wiring from the control unit to the cap generator 157 is omitted.

The base cartridge 151 has a first through hole 151d screwed to correspond to the first through hole 213 of the connection bracket 210 , and the base cartridge 151 is rotatable to the connection bracket 210 . It is fastened with screws (M1) and (M21, M22).

The piston 153 has an annular cross-section and a first protrusion 153a closest to the receiving space of the base cartridge 151, and a second protrusion 153b with an annular cross-section and spaced apart from the first protrusion 153a by a predetermined distance and , a first receiving groove (153c) formed between the first protrusion (153a) and the second protrusion (153b), and a third protrusion (153d) spaced apart from the second protrusion (153b) by a predetermined distance while having an annular cross-section; The second accommodating groove 153e is formed between the second protrusion 153b and the third protrusion 153d, and the extension 153f is connected to the third protrusion 153d. In addition, the piston 153 is hollow in the longitudinal direction, and the wire 110 is inserted and fixed through the hollow. The diameter of the second accommodating groove 153e becomes progressively smaller as it approaches the accommodating space, that is, the upper side of the cross section of the second accommodating groove 153e has a structure inclined downward in the second direction, and a structure inclined upward in the first direction. to be. The diameter of each of the first to third protrusions 153a, 153b, and 153d is equal to or slightly smaller than the diameter of the inner surface of the cylinder 154 (ie, the diameter of the hollow of the cylinder 154).

The O-ring 155 is seated and received in the first accommodating groove 153c, and the outer diameter of the O-ring 155 seated in the first accommodating groove 153c is the inner diameter of the cylinder 154 (that is, the diameter of the hollow). It becomes equal to or greater than and performs the sealing function.

The locking ball 156 is seated and received in the second receiving groove 153e, and the outer diameter of the locking ball 156 is configured to be equal to or smaller than the inner diameter (ie, hollow diameter) of the cylinder 154 .

3 is an operation state diagram of the pretensioner of FIG. 2 .

In FIG. 3A , in the pre-explosion state of the gas generating device 158 , the piston 153 is maintained at the initial position.

In FIG. 3B , the gas generating device 158 explodes to eject high-pressure gas in the accommodation space, and the piston 153 moves in a direction away from the accommodation space (first direction) by the ejected gas. At this time, the O-ring 155 and the locking ball 156 are also moved together. By the movement of the piston 153, the wire 110 connected to the piston 153 is moved in a direction in which it is pulled toward the base cartridge 151, whereby a pretension operation for forcibly restraining the wearer is performed. At this time, when the gas generating device 158 is exploded, as indicated by the arrow, the pretensioner 150 is rotated downwardly with the screw fastening (M) structure as a central axis is applied.

In (c) of Figure 3, after the collision of the vehicle is made, at this time, the passenger jumps forward by the collision and the buckle part 100 receives a force F in the upward direction or the second direction, so that the wire 110 is It is pulled in the second direction or in a direction leaving the base cartridge 151 . As the piston 153 advances in the second direction by the movement of the wire 110 in the second direction or separation from the base cartridge 151, the locking ball 156 moves into the second receiving groove 153e. Since it is caught between the inner surface of the cylinder 154 and the second accommodating groove 153e while riding on the inclined surface, the piston 153 is locked and does not move any more in the second direction.

1, 4 and 5, the moving part 200 is connected to the buckle part 100 and the pretensioner 150, and the open front surface between the vertical plate 306 of the rail part 300 is The connection bracket 210 moving along, the carrier 230 mounted on the side of the connection bracket 210 and linearly reciprocating by the rotational force from the motor 400 to move the connection bracket 210, and the carrier ( It is composed of a locking unit 250 for fixing the moving unit 200 while moving along the 230 .

The connection bracket 210 includes a pair of vertical support parts 212 that are vertically supported and mounted at regular intervals by the horizontal support part 211, and a pair of first through-holes formed on the upper side of the vertical support part 212 ( 213) and a pair of second through-holes 214a and 214b formed to be spaced apart from each other by a predetermined distance from each of the pair of first through-holes 213 and protruding toward the rail unit 300 and connected to the locking unit 250 It is composed of a protruding protrusion 215 .

In detail, the base cartridge 151 (more specifically, the first through hole 151d) of the pretensioner 150 is inserted between the pair of vertical supports 212 . An insertion hole 212a formed in the vertical support 212 close to the rail 300, and a pair of first through-holes for screwing M1 between the pair of vertical support 212 and the pretensioner 150 ( 213 and a pair of second through-holes 214a and 214b spaced apart from each of the first through-holes 213 by a predetermined distance are formed. The first fastening structure by the screw M1 fastening between the pair of first through-holes 213 and the base cartridge 151, and the screw or pin fastening between the pair of second through-holes 214a and 214b (M21, By positioning the wire 110 between the second fastening structures by M22)), the angle of the wire 110 is adjusted or maintained.

Next, the carrier 230 is provided with an uneven portion 237i having a shape corresponding to the uneven portion 310a of the belt 310, and in a state in which the carrier 230 is inserted into the belt 310, the uneven portion ( 310a) and the concave-convex portion 237i are engaged to perform a linear reciprocating motion by rotational movement of the belt 310 by driving the motor unit 400 . The carrier 230 includes a main body 232 and a front cover 234 and a rear cover 236 coupled to each other with the main body 232 interposed therebetween, and the front cover 234 and the main body 232 and It has a laminated structure of the rear cover 236 .

When the body 232 of the carrier 230 is hollow, the protrusions 233a, the first openings 233b, and the second openings 233c and the protruding protrusions 215 protruding to the front and rear respectively are guided to be movable. A vertical plate 232a having a guide hole 233d, an upper plate 232b formed on the upper side of the vertical plate 232a and having a step portion, and a lower plate 232c formed below the vertical plate 232a. do.

The front cover 234 has a through hole 234a, a groove or hollow insert 234b, a guide hole 234c through which the protruding protrusion 215 is movably guided, and a plate spring 234e are mounted. It has a plurality of mounting holes (234d) and engaging projections (235a, 235b) to be.

The rear cover 236 is hollow and has a protrusion 236a protruding toward the rear side and a receiving hole 237b formed on one side of the protrusion 236a and receiving the first opening 237a and the return spring 237h. A first plate 236b provided with, a guide hole 237c formed on the other side of the protrusion 236a and guided so that the protrusion 215 is movably guided, a second opening 237d, and a locking part 250 are provided. and a second plate 236c having protrusions 237e, 237f, and 237g that are spaced apart from each other so as not to come into contact with the inner surface of the rail 300 .

In addition, the first and/or second plates 236b and 236c are provided with an uneven portion 237i on the bottom surface, and the uneven shape of the uneven portion 237i is the unevenness of the uneven portion 310a of the belt 310 . It has the same shape, and since the concave-convex portion 237i and the concave-convex portion 310a are coupled, the carrier 230 moves when the belt 310 rotates.

The front protrusion of the protrusion 233a is inserted into the through hole 234a of the front cover 234 , and the rear protrusion of the protrusion 233a is inserted into the hollow portion of the protrusion 236a of the rear cover 236 .

The coupling protrusion 235a passes through the first opening 233b and the first opening 237a, and the coupling protrusion 235b penetrates the second opening 233c and the second opening 237d to the front cover 234. and the main body 232 and the rear cover 236 are coupled. At the time of this coupling, the protruding protrusion 215 extends toward the rear surface through the guide holes 234c, 233d, and 237c, and at least a portion of the protruding protrusion 215 passes through the carrier 230 to the rear surface. is protruded into The width of the guide holes (234c), (233d), (237c) should be greater than the width of the protrusion (215), the guide holes (234c), (233d), (237c) the longitudinal length of the locking portion (250) is rotated so that the engaging portion 253 can be inserted into the through hole 302 .

Next, the locking part 250 includes a hollow body part 251, a support protrusion 252 formed on one side of the body part 251 and supported in contact with the upper side of the return spring 237h, and the body part ( It is formed on the other side of 251 and is configured to include a locking part 253 protruding upward, and a through hole 254 into which an end of the protruding protrusion 215 is inserted and fixed.

The protrusion 236a of the rear cover 236 is inserted and seated into the hollow of the main body 251 . The locking part 250 is rotatable about the protrusion 236a of the rear cover 236 as a central axis, but the support protrusion 252 is supported by the return spring 237h to maintain the unlocked state.

The carrier 230 and the locking part 250 are received and inserted into the accommodating space S of the rail part 300 .

Next, a hollow spacer 238 is mounted between the carrier 230 and the connection bracket 210 , and a tension spring 240 is positioned while surrounding the spacer 238 . The first end 240a of the tension spring 240 is inserted and fixed to the insertion portion 234b of the carrier 230 , and the second end 240b is inserted and fixed to the insertion hole 212a.

The screw M1 includes a first extension part M11 and a second extension part M12 having a smaller diameter than the first extension part M11. In a state in which the base cartridge 151 of the pretensioner 150 is inserted between the pair of vertical supports 212 so that the pair of first through-holes 213 and the first through-holes 151d communicate with each other, the second extension The portion M12 includes the first through-hole 213, the through-hole 151d, and the through-hole 234a of the carrier 230, the hollow of the protruding portion 233a, and the hollow of the protruding portion ( 236a) into the hollow. The first extension part M11 is inserted through the first through hole 213 , the through hole 151d and the hollow of the spacer 238 . The pretensioner 150 is rotatable with the screw M1 as a central axis. The tension spring 240 maintains the connection bracket 210 and the carrier 230 at a predetermined angle or a predetermined positional relationship, so that the locking unit 2500 is maintained in the unlocked state.

Next, the rail unit 300 has a rectangular receiving space (S) formed therein and at least the front side of the receiving case 301 and the side (or upper side) of the receiving case 301 at regular intervals. A plurality of through-holes 302 formed, a pair of vertical plates 306 extending in the longitudinal direction and spaced apart from each other by a predetermined distance on the open front surface of the accommodation case 301, and an uneven portion 310a on the inner surface, A belt 310 (eg, a timing belt) that is rotationally driven by the motor unit 400 and a pulley to which the first and second pulleys 456 and 258 for rotating the belt 310 are rotatably mounted. It is configured to include a base (320).

In detail, the pulley base 320 has first and second protrusions 321 and 322 in which coupling grooves 321a and 322a are formed in the center, respectively, and the first and second pulleys 456 and 458 are rotatably mounted, respectively. ), and the first and second pulleys (456, 458) are configured to include protection protrusions (324a, 324b) for protecting each. The first and second protrusions 321 and 322 are coupled to the first and second pulleys 456 and 458 by inserting the first and second pulleys 456 and 458 into the belt 310, the belt 310. They are installed at intervals so that the tension of the

Next, the motor unit 400 includes a motor 402 in which the motor shaft 402a faces a first direction, a center hollow in the first direction, and an accommodation space formed therein to protect the motor 402 . The case 410, the first gear 411 connected to the motor shaft 402a exposed to the outside and rotated by the rotation of the motor shaft 402a as a worm gear, and the reduction unit fixing the motor case 410 A motor base 412 for rotatably mounting the first reduction gear 452 and the second reduction gear 454 of the 452, 454, 456, and the motor base 412 are connected to the reduction unit 452, A gear cover 416 having first and second through-holes 417a and 417b for protecting 454 and 456, and a rotation speed of the motor 402 are reduced so that the belt 310 rotates at the reduced speed. The reduction parts 452, 454, 456, the second pulley 458 rotatably mounted on the second protrusion 321, and the first pulley 456 of the reduction parts 452, 454, 456 are protected. and a first cover 460 having a through hole 460a, and a second cover 462 protecting the second pulley 458 and having a through hole 462a.

In detail, the motor base 412 includes a first plate 412a formed with a through hole 413 through which the first gear 411 passes to rotate the first reduction gear 452, and a coupling groove in the center. (414a) is formed and the first reduction gear 452 is provided with a second plate (412b) formed with a protrusion (414) to be rotatably mounted, the first plate (412b) and the second plate (412b) of each One side is joined to form a vertical.

The reduction parts 452, 454, and 456 are rotatably mounted on the protrusion 414 and are a helical gear, a first reduction gear 452 rotated by the first gear 411, and the first reduction gear 452. A second reduction gear 454 that is mounted on the upper side and rotates together by the rotation of the first reduction gear 452 as a spur gear, and a hollow is formed and rotates by the second reduction gear 454 and rotates the belt 310 It is configured to include a first pulley 456 to rotate.

In detail, the first reduction gear 452 has a hollow 453a formed in the center and is configured to include a rectangular protrusion 453 on the upper side. The second reduction gear 454 has a hollow 455 having the same cross-sectional shape as the cross-sectional shape of the protrusion 453 in the center.

The first pulley 456 is a spur gear and is mounted on the bottom surface of the third reduction gear 456a rotated by the rotation of the second reduction gear 454 and the third reduction gear 456a and rotates the belt 310 . It is composed of a pulley portion 456b.

The first protrusion 321 is inserted into the hollow of the pulley portion 456b, and the screw M31 passes through the first through hole 417a, the through hole 460a, and the hollow of the first pulley 456. It is inserted into the coupling groove 321a to perform a function of fixing the central axis function of the first pulley 456 and the first cover 460 and the gear cover 416 . In addition, the projection 414 is inserted into the hollow 453a of the first reduction gear 452, the projection 453 is inserted into the hollow 455 of the second reduction gear 454, the screw M32 is the gear The second through hole 417b, the hollow 455 and 453a of the cover 416 are inserted and mounted in the coupling groove 414a, and the central axis function of the first and second reduction gears 452 and 454 and It functions to fix the gear cover 416 . In addition, the second protrusion 322 is inserted into the hollow 458a formed in the second pulley 458, and the screw M4 penetrates the through hole 462a and the hollow 458a and is inserted into the coupling groove 322a. It is mounted to perform a function of fixing the central axis function of the second pulley 458 and the second cover 462 .

In this embodiment, the moving unit 200 is located on the side of the pretensioner 150 , and the moving path of the conveying unit 200 corresponds to a straight path of the open front of the receiving case 301 .

The motor 402 of the motor unit 400 of the present invention and the gas generating device 158 of the pretensioner 150 are controlled by a control unit (not shown). The control unit controls the motor according to a movement command for movement in the first direction and movement in the second direction with respect to the seat belt buckle presenter assembly from an input unit (not shown), or according to a preset position of the seat belt buckle presenter assembly. control 402 .

The unlocking state in FIG. 6 is explained. The locking part 253 is spaced apart from the lower side of the through hole 302 by a predetermined interval by the elastic force of the tension spring 240 and the restoring spring 237h, and the pretensioner 150 and the carrier 230 are rotated by a particularly small impact. It is maintained so as not to be locked. In addition, the pretensioner 150 , the carrier 230 , and the locking unit 250 are linearly moved in the first direction or the second direction by the operation of the motor 402 . That is, the pretensioner 150 is moved along the open side of the rail part 300 by the movement of the carrier 230 and the locking part 250 by the operation of the motor 402 .

In addition, the control unit receives the detection signal from the danger detection device (not shown), and determines the danger state or the safety state of the vehicle according to the detection signal. Here, the risk detection device is a device that applies a control unit by generating a detection signal for vehicle acceleration, rollover detection, and the like. Since the control unit does not operate the gas generating device 158 of the pretensioner 150 in the safe state, the locking portion 250 of the seat belt buckle presenter assembly is maintained in the unlocked state described above.

The locking state in FIG. 7 is explained. The control unit operates the gas generating device 158 of the pretensioner 150 in a dangerous state, and as a reaction to this explosion operation, as indicated by an arrow, the pretensioner 150 is rotated counterclockwise (ie, the rail part 300) direction. ) or to rotate in the downward direction, that is, to move or rotate in the downward direction, the rotational force of the pretensioner 150 and the connection bracket 210 is larger than the elastic force of the tension spring 240 and the restoration spring 237h. The protrusion 215 and the locking part 250 of the 210 are also rotated. The locking part 253 is rotated upward by the rotation of the locking part 250 and inserted into the through hole 302 to change to a locked state.

In another embodiment, in the unlocked state, when the passenger's body is strongly moved in the first direction due to a strong collision, the pretensioner 150 is rotated in the same direction as in FIG. The rotational force of the pretensioner 150 and the connection bracket 210 due to body movement is larger than the elastic force of the tension spring 240 and the restoration spring 237h, and the protrusion 215 and the locking part 250 of the connection bracket 210. is also rotated. The locking part 253 is rotated upward by the rotation of the locking part 250 and inserted into the through hole 302 to change to a locked state.

The above-described transition from the unlocked state to the locked state may be performed by at least one of an operation of the gas generating device 158 and movement of a passenger's body.

In the case of the above-mentioned conversion function to the locked state (locking function), it is useful to prevent the sub-marine phenomenon. When the wearer moves forward due to inertia, such as in a vehicle collision, if there is no locking function, the seat belt buckle presenter assembly is also moved forward and the seat belt is loosened, which may cause a sub-marine phenomenon. However, due to the locking function of the present invention, even if the wearer moves forward due to inertia, the seat belt buckle presenter assembly is not moved and fixed to the current position, thereby preventing the sub-marine phenomenon.

As described above, the present invention is not limited to the specific preferred embodiments described above, and anyone with ordinary skill in the art to which the invention pertains can use various methods without departing from the gist of the invention as claimed in the claims. It goes without saying that modifications are possible, and such modifications are intended to be within the scope of the claims.

150: pretensioner 200: moving part
300: rail unit 400: motor unit

Claims (10)

a buckle part;
a pretensioner connected to the buckle part through a wire and having a gas generator to pull the wire by explosion of the gas generator;
a moving unit rotatably connected to the pretensioner and movable along the rail unit;
a motor unit for applying a rotational force to the rail unit;
a rail unit for reciprocating the moving unit with rotational force from the motor unit;
A locking part is provided so that the moving part is locked to the rail part by rotating with the rotation of the pretensioner,
An elastic member for maintaining a certain angle or positional relationship between the pretensioner and the moving part in the unlocked state is provided,
When the rotational force of the pretensorer is greater than the elastic force of the elastic member, the locking part rotates and the moving part is locked on the rail part,
The moving part is inserted into the accommodating space of the connection bracket connected to the pretensioner from the open front of the rail part and is rotatably mounted on the side of the connection bracket to move the connection bracket by linear reciprocating motion by the rotational force from the motor part. A seat belt buckle presenter assembly comprising a carrier for delete delete delete The method of claim 1,
The seat belt buckle presenter assembly, characterized in that the elastic member is mounted between the connecting bracket and the carrier. The method of claim 1,
A seat belt buckle, characterized in that the locking part is rotatably connected to the carrier in the accommodating space of the rail part, one end of the locking part is connected to the connection bracket and the protrusion, and the other end of the locking part is elastically supported by a restoring spring of the carrier. Presenter assembly. 7. The method of claim 6,
The rail unit includes a receiving case having a rectangular receiving space inside, at least an open front side, a plurality of through holes formed at regular intervals on one side of the receiving case, and a belt having an uneven portion on the inner side, and a motor unit. A seat belt buckle presenter assembly comprising a pulley base to which each of the first and second pulleys for rotating and rotating the belt is rotatably mounted. 8. The method of claim 7,
The locking part has a locking part inserted into the through hole,
In the unlocked state, the locking part is spaced apart from the through hole,
A seat belt buckle presenter assembly, characterized in that the locking part is inserted into the through hole in the locked state. 8. The method of claim 7,
A seat belt buckle presenter assembly, characterized in that between the motor unit and the first pulley, a reduction unit for reducing the rotation speed of the motor unit is provided. 8. The method of claim 7,
The seat belt buckle presenter assembly according to claim 1, wherein the carrier is inserted into the belt, and a lower surface of the carrier has an uneven portion engaged with the uneven portion of the belt.

Images