JP2020131980A - Buckle device - Google Patents

Abstract

To provide a buckle device that improves the attachment of a tongue and also improves occupant restraint performance in a collision of a vehicle.SOLUTION: A buckle device 10 comprises: a buckle 20 engaging with a tongue 16; a rail 32 that allows the buckle 20 side to rotate around the floor side, and guides a sliding unit 38; a driving device 30 that makes the sliding unit 38 move; a buckle base 21 supporting the buckle 20; a support wire 22 that connects the sliding unit 38 and the buckle base 21; a draw-in wire 64 extending from the rail 32 to outside; and a drawing unit 14 that makes the draw-in wire 64 move in one direction at the time of a collision or a collision prediction of a vehicle, and which makes the rail 32 rotate so that the buckle base 21 moves to the vehicle front side.SELECTED DRAWING: Figure 1

Description

The present invention relates to a buckle device.

Patent Document 1 discloses a buckle device capable of moving a buckle connected to a wire between a storage position and an extension position by rotating a spool with a motor to change the length of the wire. In the buckle device, the buckle moves to the extended position, which enables the occupant to easily attach the tongue to the buckle.

German Patent Application Publication No. 1020141099775

According to the buckle device, the wearability of the tongue is improved, but the restraint of the occupant cannot be improved in the event of a vehicle collision.

In view of the above facts, an object of the present invention is to provide a buckle device having improved tongue wearability and improved occupant restraint in the event of a vehicle collision.

In the buckle device of the first aspect of the present invention, the buckle to which the tongue inserted through the webbing mounted on the occupant is engaged and the buckle side can be rotated around the floor side, and the moving body can be moved inside. A guide portion for guiding, a moving mechanism for moving the moving body in the guide portion, a support portion provided outside the guide portion for supporting the buckle, and a connection for connecting the moving body and the support portion. The extension portion extends outward from the guide portion, and the extension portion is moved in one direction at the time of a collision or a collision prediction of a vehicle so that the support portion moves to the front side of the vehicle. It is equipped with an operating mechanism that rotates the guide unit.

In the buckle device of the first aspect, the buckle device of the second aspect of the present invention includes a connecting portion that connects the extending portion to the connecting portion by moving in the one direction, and the operating mechanism is a vehicle. At the time of a collision or prediction of a collision, the extending portion is moved in the one direction, the extending portion and the connecting portion are connected by the connecting portion, and the supporting portion is moved to the front side of the vehicle. To rotate.

The buckle device of the third aspect of the present invention is the buckle device of the second aspect, in which the first gear rotatably supported with respect to the support portion and the first gear fixed to the buckle and connected to the first gear. A second gear is provided, and the connection portion extends from the first fixing piece housed in the moving body to the support portion along the longitudinal direction of the guide portion and is fixed coaxially with the first gear. A support wire that is wound around a rotating body and extends from the rotating body to a second fixed piece housed in the moving body along the longitudinal direction. Inside the moving body, the support wire is attached to the second. The connecting portion is provided with an urging portion for urging in the urging direction from the fixed piece toward the first fixed piece, and the connecting portion is an extension portion of the support wire extending from the second fixed piece in a direction opposite to the urging direction. When connected to the support wire and the support wire moves in the opposite direction, the first gear rotates the second gear so that the buckle faces upward on the vehicle.

In the buckle device of the fourth aspect of the present invention, the second gear has a smaller diameter than the first gear in the buckle device of the third aspect.

In the buckle device of the fifth aspect of the present invention, in the buckle device of the third or fourth aspect, the connecting portion is connected to the tubular portion through which the support wire penetrates and the tubular portion, and the extending portion is fixed. The fixed portion is provided, a plurality of claw portions extending from the tubular portion and capable of locking the support wire, and a tube portion capable of accommodating the tubular portion and the claw portion, and the claw portion is the tube. When not housed in the portion, the claw portion opens to the outer peripheral side of the support wire, the support wire is not locked, and the tubular portion moves in the one direction, so that the claw portion becomes the pipe portion. When housed in, the claws lock the support wires.

The buckle device according to the sixth aspect of the present invention is the buckle device according to any one of the first to fifth aspects, wherein the extending portion is a lead-in wire extending from the guide portion to the front of the vehicle.

The buckle device according to the seventh aspect of the present invention is a control that invalidates the operation of the operating mechanism when the seat back is raised beyond a predetermined angle in the buckle device according to any one of the first to sixth aspects. It has a part.

According to the buckle device of the present invention, the buckle can be raised to the upper side of the vehicle when the tongue is attached, and the buckle can be lowered to the lower side of the vehicle after the tongue is attached. Can be improved. Further, when the vehicle collides or predicts a collision, the buckle can be further moved to the lower side of the vehicle and also to the front side of the vehicle, so that the restraint of the occupant can be improved. That is, according to the present invention, it is possible to improve the wearability of the tongue and improve the restraint of the occupant when the vehicle collides.

It is the buckle device of embodiment, and is the side sectional view seen from the vehicle width direction which shows the state which a buckle is in a retracted position. It is an exploded perspective view of the buckle device of an embodiment. It is the internal structure of the sliding unit in the buckle device of embodiment, and is the figure which shows (A) before the operation of the pulling unit, and (B) after the operation of the pulling unit. It is sectional drawing which shows the internal structure of the coupler in the buckle apparatus of embodiment, and is the figure which shows (A) before the operation of the pulling unit, (B) after the operation of a pulling unit. It is a block diagram explaining the control system in the buckle apparatus of embodiment. It is a side sectional view explaining the state which the buckle moved to the mounting position in the buckle device of embodiment. It is a side sectional view explaining the state which the buckle stands up in the buckle apparatus of embodiment. It is a side sectional view explaining the state which the buckle moved to the pulling position in the buckle apparatus of embodiment.

Hereinafter, an example of the buckle device according to the embodiment of the present invention will be described with reference to the drawings. In each figure, the arrow FR indicates the front side of the vehicle, the arrow UP indicates the upper side of the vehicle, and the arrow RH indicates the right side in the vehicle width direction. Further, in the following description, when "clockwise direction" and "counterclockwise direction" are described, it indicates the rotation direction seen from the left side in the vehicle width direction.

(Constitution)
As shown in FIG. 1, the buckle device 10 of the embodiment includes a lift-up unit 12 for lifting up the buckle 20, and a pulling unit 14 as an operating mechanism for moving the buckle 20 to a pulling position described later. , Is equipped. In the buckle device 10 of the present embodiment, the pulling unit 14 is arranged on the vehicle lower side of the lift-up unit 12. The buckle 20 is configured so that the tongue 16 can be engaged with the buckle 20, and the tongue 16 is formed with an insertion port 16A through which the webbing 18 mounted on the occupant is inserted. The webbing 18 is wound on a winding device.

The lift-up unit 12 includes a buckle 20, a buckle base 21 as a support portion, a support wire 22 as a connection portion, and a drive device 30 as a moving mechanism.

The buckle 20 is provided with an insertion port for the tongue 16 on the upper side of the rail 32 described later in the longitudinal direction (hereinafter, simply referred to as the "longitudinal direction"), and the second gear on the lower side in the longitudinal direction about the vehicle width direction. 48 is fixed. Therefore, the buckle 20 of the present embodiment can rotate integrally with the second gear 48.

The buckle base 21 has a function of rotatably supporting the buckle 20. As shown in FIG. 2, the buckle base 21 includes a plate-shaped base plate 40 and a pair of cylindrical pins extending from the base plate 40 to the right in the vehicle width direction, that is, a first shaft 41 and a second shaft 42. .. The first shaft 41 on the lower side in the longitudinal direction is inserted through the shaft hole 46A common to the pair of first gears 46 and the pulley 44 as a rotating body. Further, the second shaft 42 on the upper side in the longitudinal direction is inserted into the shaft hole 48A of the second gear 48 fixed to the buckle 20.

As described above, the first gear 46 and the second gear 48 are rotatably supported by the buckle base 21, so that the first gear 46 and the second gear 48 are connected to each other. Specifically, the first gear 46 and the second gear 48 are always in mesh with each other. Further, the pulley 44 is fixed in a state of being sandwiched between a pair of first gears 46 in the vehicle width direction which is the axial direction. In the present embodiment, the outer diameter of the pulley 44 is smaller than the outer diameter of the first gear 46, and even if the support wire 22 is wound around the outer peripheral portion of the pulley 44, the support wire 22 remains in the radial direction of the first gear 46. It is configured so that it does not protrude outward.

The support wire 22 is a flexible metal wire cable. The support wire 22 is covered with a coating material over the entire circumference. The coating material is made of a resin material having flexibility and heat resistance, and is particularly made of a thermosetting elastomer. The support wire 22 extends from the sliding unit 38 described later to the pulley 44 along the longitudinal direction and is wound around the pulley 44, and further extends from the pulley 44 to the sliding unit 38 along the longitudinal direction. That is, the support wire 22 reciprocates between the pulley 44 and the sliding unit 38. The support wire 22 of the present embodiment has an extension portion 22A extending downward in the longitudinal direction from the second piece 24B, which will be described later, through the sliding unit 38 (see FIG. 1).

Further, in the present embodiment, the columnar pieces 24 are fixed to the reciprocating support wires 22 respectively. The piece 24 is formed by processing a metal plate or die-casting. Of the pieces 24, the first piece 24A as the first fixing piece is fixed to one end of the support wire 22 extending in the longitudinal direction on the rear side of the vehicle from the drive screw 36 described later. Further, the second piece 24B as the second fixing piece of the pieces 24 is fixed at an intermediate position of the support wire 22 extending in the longitudinal direction on the front side of the vehicle from the drive screw 36. Both the first piece 24A and the second piece 24B are housed inside the sliding unit 38.

The drive device 30 includes a rail 32 as a guide portion, a housing 33, a motor 34, a worm gear 35, a drive screw 36, and a sliding unit 38 as a moving body. The drive device 30 is configured so that the upper side in the longitudinal direction (that is, the buckle 20 side) can rotate in the rotation shaft 30A provided at the lower end in the longitudinal direction. The rotating shaft 30A is fixed to, for example, a floor, a seat rail, or the like.

The rail 32 is a long substantially box-shaped member whose longitudinal direction is toward the front side of the vehicle as it goes toward the upper side of the vehicle, and the lower side in the longitudinal direction and the left side in the vehicle width direction are open, respectively. A support hole 32A into which the reduced diameter upper end of the drive screw 36 is inserted is formed in the upper wall portion on the upper side in the longitudinal direction of the rail 32, and support wires 22 are inserted on both sides of the support hole 32A in the vehicle front-rear direction. A pair of possible grooves 32B is formed. Further, the front wall portion on the front side of the vehicle of the rail 32 is formed with an opening 32C through which a lead-in wire 64, which will be described later, can be inserted from an end portion on the lower side in the longitudinal direction toward the upper side in the longitudinal direction. A drive screw 36, a sliding unit 38, and a coupler 66 described later are arranged inside the rail 32 of the present embodiment.

A housing 33 is fixed to the lower end of the rail 32 in the longitudinal direction by bolts or the like. The housing 33 is provided with an insertion hole 33A formed along the longitudinal direction into which the lower end of the drive screw 36 is inserted. Further, a ball bearing 33B is fixed on the same axis as the insertion hole 33A. The housing 33 is a container whose lower side in the longitudinal direction is open. The housing 33 becomes a housing portion in which the motor 34 and the worm gear 35 are housed by assembling the case 39 whose upper side in the longitudinal direction is open.

The motor 34 has an output shaft 34A extending in a direction orthogonal to the longitudinal direction. The motor 34 of this embodiment is a DC motor, and the motor 34 is electrically connected to the control device 70 (see FIG. 5).

The worm gear 35 includes a worm 35A that engages with the output shaft 34A of the motor 34 and a helical gear 35B that meshes with the worm 35A and engages with the drive screw 36.

The drive screw 36 is a cylindrical rod-shaped member extending in the longitudinal direction. The drive screw 36 is rotatably supported on the upper side in the longitudinal direction by a support hole 32A provided in the rail 32, and is rotatably supported on the lower side in the longitudinal direction by a ball bearing 33B fixed to the housing 33. Further, the drive screw 36 has a male screw formed on the outer peripheral surface along the longitudinal direction.

As shown in FIGS. 2, 3 (A) and 3 (B), the sliding unit 38 includes a metal slider 38A and a resin shoe 38B. The slider 38A has a female screw (not shown) formed on the inner peripheral surface of the through hole 38A1 formed in the longitudinal direction, and this female screw is screwed into the male screw of the drive screw 36. Further, a pair of through grooves 38A2 are formed on both sides of the through hole 38A1 in the vehicle front-rear direction from both ends in the vehicle front-rear direction toward the through hole 38A1. The through groove 38A2 is formed with a width through which the support wire 22 is inserted and the piece 24 is not inserted.

The shoe 38B is a substantially box-shaped member having an open right side in the vehicle width direction. Through grooves 38B1 are formed in the upper wall portion on the upper side in the longitudinal direction and the lower wall portion on the lower side in the longitudinal direction of the shoe 38B from the right end in the vehicle width direction to the left side in the vehicle width direction, respectively. The drive screw 36 is inserted into the through grooves 38B1 on both sides in the longitudinal direction. Further, two sets of through grooves 38B2 are formed on both sides of the through grooves 38B1 in the upper wall portion and the lower wall portion in the vehicle front-rear direction from the right end in the vehicle width direction to the left side in the vehicle width direction. The through groove 38B2 is formed with a width through which the support wire 22 is inserted and the piece 24 is not inserted.

As shown in FIG. 3A, in the present embodiment, the slider 38A and the shoe 38B in which the slider 38A is housed are housed in the rail 32. As a result, the slider 38A and the shoe 38B are guided in the longitudinal direction in the rail 32. Here, the slider 38A is arranged inside the shoe 38B toward the upper side in the longitudinal direction. Further, in the present embodiment, the piece 24 is located between the slider 38A and the lower wall portion of the shoe 38B.

Here, the first piece 24A is urged downward in the longitudinal direction by a spring 26 as an urging portion. Further, the second piece 24B is urged upward in the longitudinal direction by the spring 26. The spring 26 is a coil spring, and is housed inside the sliding unit 38 with the support wire 22 inserted therein. As described above, the support wire 22 in the present embodiment has the direction from the second piece 24B to the first piece 24A as the urging direction.

As shown in FIGS. 2 and 4A, the coupler 66 as a connecting portion includes a locking member 67 to which the lead-in wire 64 is fixed, and a sleeve 68 as a pipe portion. The lock member 67 is a member having a substantially 8-shaped cross section when viewed from the longitudinal direction. The lock member 67 is provided adjacent to the wire guide 67A as a tubular portion through which the extension portion 22A of the support wire 22 can be inserted in the longitudinal direction, and the upper end of the lead-in wire 64 extending downward in the longitudinal direction. Includes a wire end 67B as a fixing portion for fixing. Further, the locking member 67 includes a locking claw 67C as a claw portion extending upward in the longitudinal direction from the upper end of the wire guide 67A. The locking claws 67C can be formed at a plurality of locations surrounding the support wire 22, and are arranged at three locations on the outer peripheral portion of the support wire 22 at equal intervals in the present embodiment.

The sleeve 68 is a member having a substantially C-shaped cross section having an opening 68A on the front side in the vehicle width direction. The sleeve 68 allows the wire guide 67A and the locking claw 67C to be inserted inside while the wire end 67B of the lock member 67 is pushed out of the opening 68A. The sleeve 68 is arranged on the lower side in the longitudinal direction with respect to the lock member 67. When the lock member 67 is pulled downward in the longitudinal direction by the lead-in wire 64, the wire guide 67A and the locking claw 67C are inserted into the sleeve 68 as shown in FIG. 4B. Here, the three locking claws 67C are arranged so as to spread outward in the radial direction of the support wire 22 before being inserted into the sleeve 68 (see FIG. 4A), but are inserted into the sleeve 68. If so, it narrows inward in the radial direction of the support wire 22 and comes into contact with the outer peripheral surface of the support wire 22. Specifically, the tip of the locking claw 67C bites into the coating material provided on the outer peripheral surface of the support wire 22. As a result, the support wire 22 is locked by the lock member 67.

As shown in FIG. 1, in the present embodiment, the support wire 22 extending upward in the longitudinal direction from the rail 32 is housed in the tubular cover 50. The cover 50 is a tubular member formed of an elastic material such as rubber, and a bellows portion 50A capable of bending is formed in a portion corresponding to the buckle base 21. Further, the cover 50 has a lower side in the longitudinal direction inserted into the rail 32 and can slide along the rail 32. Further, the end portion of the cover 50 on the upper side in the longitudinal direction is fixed to the buckle 20.

The pulling unit 14 includes a gas generator 60, a piston 62 slidably provided inside the gas generator 60, and a pulling wire 64 as an extending portion drawn into the gas generator 60 by the piston 62. Includes.

The gas generator 60 is provided on the vehicle front side of the pulling unit 14. The gas generator 60 is a device that generates gas by operating the ignition device 60A. The igniter 60A is electrically connected to the control device 70 (see FIG. 5).

The piston 62 is formed so as to be movable in the cylinder 60B formed along the vehicle front-rear direction of the gas generator 60.

The lead-in wire 64 is a metal wire cable. The lead-in wire 64 extends in the front-rear direction of the vehicle in the cylinder 60B, changes its direction from the vicinity of the rear end of the gas generator 60 to the upper side of the vehicle, and is closer to the front of the vehicle. Extends towards. The end of the lead-in wire 64 on the vehicle front side is fixed to the center of the cross section of the piston 62, and the end of the lead-in wire 64 on the vehicle upper side is fixed to the coupler 66.

The control device 70 is provided as a control unit that controls the position of the buckle 20. As shown in FIG. 5, the control device 70 is electrically connected to the motor 34 and the ignition device 60A, and can output a signal to the motor 34 and the ignition device 60A. Further, the control device 70 is electrically connected to the buckle switch 20A, the seating sensor 72, the reclining sensor 74, the collision prediction sensor 76, and the acceleration sensor 78, and can input signals.

The buckle switch 20A is a sensor that detects the mounted state of the tongue 16 on the buckle 20. The control device 70 of the present embodiment determines that the buckle 20 is in the mounted state when the tongue 16 is mounted and the buckle switch 20A is turned on.

The seating sensor 72 is a sensor that detects the seated state of the seat provided with the buckle device 10. The control device 70 of the present embodiment determines that the vehicle is in the seated state when the occupant is seated on the seat provided with the buckle device 10 and the seating sensor 72 is turned on.

The reclining sensor 74 is a sensor that detects the angle of the seat back in the seat provided with the buckle device 10. The control device 70 of the present embodiment determines that the occupant is in a comfortable posture when the reclining sensor 74 detects that the angle of the seat back with respect to the horizontal plane is equal to or less than a predetermined angle. Further, the control device 70 determines that the occupant is in the standing posture when the reclining sensor 74 detects that the angle of the seat back with respect to the horizontal plane exceeds a predetermined angle.

The collision prediction sensor 76 is a sensor such as a millimeter-wave radar or an in-vehicle camera that can acquire at least the situation in front of the vehicle. The control device 70 of the present embodiment determines that a vehicle collision has been predicted when the collision prediction sensor 76 detects that the vehicle has approached a preceding vehicle or an obstacle.

The acceleration sensor 78 is a sensor that is fixed to the vehicle body and detects the acceleration generated in the vehicle. The control device 70 of the present embodiment determines that the vehicle has collided when the acceleration detected by the acceleration sensor 78 exceeds a predetermined threshold value.

(Action)
In the buckle device 10 having the above configuration, when the occupant is not seated on the seat (when the occupant is not detected by the seating sensor 72), the buckle 20 is stored at the lower side of the vehicle and the rear side of the vehicle (FIG. 1).

When the occupant is seated on the seat (when the occupant is detected by the seating sensor 72), the motor 34 is positively driven by the control of the control device 70. As a result, the drive screw 36 is rotated in one direction via the worm gear 35, and the sliding unit 38 is moved upward in the longitudinal direction while being guided by the rail 32. Therefore, the support wire 22 and the buckle base 21 are moved to the upper side in the longitudinal direction together with the sliding unit 38, so that the buckle 20 is moved to the mounting position on the upper side of the vehicle and the front side of the vehicle as shown in FIG. To do.

On the other hand, the webbing 18 is pulled out from the winding device, and the tongue 16 into which the webbing 18 is inserted is attached to the buckle 20. According to the present embodiment, since the tongue 16 is mounted on the buckle 20 at a mounting position higher than the retracted position, the wearability of the tongue 16 is improved as compared with the case where the occupant mounts the tongue 16 at the retracted position. To.

When the tongue 16 is attached to the buckle 20 (when the tongue 16 is detected by the buckle switch 20A), the motor 34 is reversely driven by the control of the control device 70. As a result, the drive screw 36 is rotated in the other direction via the worm gear 35, and the sliding unit 38 is moved downward in the longitudinal direction while being guided by the rail 32. Therefore, the support wire 22 and the buckle base 21 are moved downward in the longitudinal direction together with the sliding unit 38, so that the buckle 20 is moved to the storage position on the lower side of the vehicle and the rear side of the vehicle. The webbing 18 is attached to the occupant by moving the tongue 16 to the lower side of the vehicle and the rear side of the vehicle together with the buckle 20.

Next, the flow in which the buckle 20 moves from the storage position to the pulling position at the time of a vehicle collision or collision prediction will be described.

When the control device 70 predicts a vehicle collision or determines that the vehicle has collided, the withdrawal of the webbing 18 from the winding device is restricted and the ignition device 60A is energized. As a result, the gas generator in the gas generator 60 is ignited, and high-pressure gas is instantly generated. Then, as shown in FIG. 7, the piston 62 is moved to the front side of the vehicle while being guided by the cylinder 60B by the pressure of the gas, and one end side of the lead-in wire 64 moves to the front side of the vehicle integrally with the piston 62. Then, the other end side of the lead-in wire 64 moves downward in the longitudinal direction integrally with the lock member 67.

As the lock member 67 moves downward in the longitudinal direction, the wire guide 67A and the locking claw 67C are inserted into the sleeve 68 in the lock member 67. As a result, the plurality of locking claws 76C lock the extension portion 22A of the support wire 22 (see FIG. 4B). Further, as the lock member 67 moves downward in the longitudinal direction, the lead-in wire 64 pulls the extension portion 22A downward in the longitudinal direction. Therefore, in the sliding unit 38, the second piece 24B moves downward in the longitudinal direction against the urging force of the spring 26 (see FIG. 3B).

On the other hand, the buckle 20 to which the tongue 16 is mounted is pulled upward in the longitudinal direction by the tension of the webbing 18, and the support wire 22 is in close contact with the outer peripheral portion of the pulley 44. Therefore, when the support wire 22 on the second piece 24B side (front side of the vehicle) moves downward in the longitudinal direction, the support wire 22 rotates the pulley 44 counterclockwise at the winding portion of the pulley 44. Further, as the pulley 44 rotates in the counterclockwise direction, the support wire 22 on the first piece 24A side (rear side of the vehicle) is moved upward in the longitudinal direction. As a result, in the sliding unit 38, the first piece 24A moves upward in the longitudinal direction against the urging force of the spring (see FIG. 3B).

As described above, when the coupler 66 locks the extension portion 22A of the support wire 22 and pulls it downward in the longitudinal direction, the support wire 22 is pulled out by the stroke of the spring 26 in the direction opposite to the urging direction of the spring 26. Will be done. At this time, the support wire 22 rotates the pulley 44 in the counterclockwise direction. Further, the first gear 46 rotates counterclockwise together with the pulley 44, so that the second gear 48 rotates clockwise. Therefore, the buckle 20 to which the second gear 48 is fixed stands up.

As described above, since the buckle 20 is pulled upward in the longitudinal direction by the tension of the webbing 18, the buckle 20 actually stands up while the rail 32 falls (rotates toward the front of the vehicle). Become.

Subsequently, when the extension portion 22A of the support wire 22 is still pulled downward in the longitudinal direction even when the stroke of the spring 26 is lost, the rail 32 is moved to the floor side with the rotation shaft 30A as the axis, as shown in FIG. Fall over. As a result, the buckle 20 moves to the pulling position on the lower side of the vehicle and the front side of the vehicle while the insertion port of the tongue 16 faces the upper side of the vehicle. Here, when the buckle 20 moves to the pulling position without standing up, the webbing 18 approaches the short side of the insertion port 16A in the tongue 16. In this case, if a strong tension is generated in the webbing 18 due to a vehicle collision, the sliding of the webbing 18 may be hindered by the short side of the insertion port 16A. On the other hand, according to the buckle device 10 of the present embodiment, when the buckle 20 is moved, it is possible to suppress a change in the tipping angle of the buckle 20, thereby causing the webbing 18 inserted through the tongue 16 to be biased. It can be suppressed. That is, since the webbing 18 is always in contact with the long side of the insertion port 16A, the webbing 18 can be smoothly slidable even if a strong tension is generated in the webbing 18.

According to the present embodiment, the buckle 20 moves from the retracted position to the attracted position at the time of a vehicle collision or a collision prediction. Then, by moving the lumbar webbing 18 together with the tongue 16 to the lower side of the vehicle and the front side of the vehicle, a slight slack of the lumbar webbing 18, so-called "slack", can be removed. Further, by moving the lumbar webbing 18 to the lower side of the vehicle and the front side of the vehicle, the webbing 18 can be moved in the direction of erecting the pelvis of the occupant. This makes it possible to optimize the position of the webbing with respect to the lumbar region and suppress the occurrence of the so-called submarine phenomenon in which the occupant slips forward from the lower part of the seatbelt. That is, according to the buckle device 10 of the present embodiment, it is possible to improve the wearability of the tongue 16 and improve the restraint of the occupant when the vehicle collides.

Further, in the buckle device 10 of the present embodiment, the lead-in wire 64 and the support wire 22 are connected in the coupler 66, and the extension portion 22A of the support wire 22 moves downward in the longitudinal direction, so that the rail 32 moves the rotation shaft 30A. Rotate to the center. That is, in the present embodiment, the lead-in wire 64 is not directly connected to the rail 32, and the tension of the lead-in wire 64 does not act directly on the rail 32. Here, when the lead-in wire 64 is directly connected to the rail 32, it is necessary to reinforce the connecting portion and its surroundings, which complicates the structure and deteriorates the moldability. On the other hand, according to the buckle device 10 of the present embodiment, the rail 32 can have a simple structure.

Further, in the buckle device 10 of the present embodiment, the second gear 48 is formed to have a smaller diameter than the first gear 46, and the rotation angle of the pulley 44 is increased from the first gear 46 to the second gear 48. That is, the rotation angle of the buckle 20 is larger than the rotation angle of the pulley 44. According to the present embodiment, the angle change of the buckle 20 with respect to the movement amount of the support wire 22 can be made larger than that in the case where the second gear 48 has the same diameter or more as the first gear 46. This is effective when the compression stroke of the spring 26 cannot be secured and the rotation angle of the pulley 44 is small.

Further, in the coupler 66 of the present embodiment, when the pulling unit 14 does not operate and the locking claw 67C is not inserted into the sleeve 68, the support wire 22 can move the wire guide 67A in the longitudinal direction (FIG. FIG. 4 (A)). That is, the buckle 20 can move between the storage position and the pulling position. On the other hand, when the pulling unit 14 is activated and the locking claw 67C is inserted into the sleeve 68 together with the wire guide 67A, the locking claw 67C can lock the support wire 22 (see FIG. 4B). ). As described above, according to the present embodiment, when the pulling unit 14 does not operate, the buckle 20 can be moved up and down without hindering the movement of the support wire 22, and the pulling unit 14 operates. A coupler 66 capable of locking the support wire 22 can be provided.

Further, in the buckle device 10 of the present embodiment, since the rail 32 to the gas generator 60 of the pulling unit 14 are connected by a pulling wire 64 which is a wire cable, the degree of freedom in arranging the pulling unit 14 is ensured. Can be done. That is, in the pulling unit 14 of the present embodiment, the gas generator 60 is arranged along the vehicle front-rear direction on the vehicle lower side of the lift-up unit 12, but the present invention is not limited to this. For example, the pulling unit 14 may be arranged so that the gas generator 60 faces diagonally with respect to the vehicle front-rear direction, or the pull-in wire 64 may be pulled toward the vehicle rear side by reversing the vehicle front-rear direction of the gas generator 60. The pulling unit 14 may be arranged.

Further, the buckle device 10 of the present embodiment is configured so that the buckle 20 does not move from the retracted position to the attracted position at the time of a collision or a collision prediction if the seat back is upright to some extent. Specifically, when the reclining sensor 74 detects that the seat back angle exceeds a predetermined angle, the control device 70 stops the energization of the ignition device 60A and invalidates the pulling unit 14. Therefore, according to the present embodiment, the position of the lumbar webbing 18 can be moved only when the seat back is reclining and the occupant is in a comfortable posture and the submarine phenomenon is likely to occur.

<Remarks>
The pulling unit 14 of the present embodiment has a configuration in which the pulling wire 64 is pulled by the piston 62, but the present invention is not limited to this, and a metal rod may be used to pull the pulling wire 64. Further, the pulling unit 14 may be configured to push out the rod by the piston. In this case, the rod is arranged substantially parallel to the extension portion 22A of the support wire 22, and the rod is arranged so as to push out the lock member 67 from the upper side in the longitudinal direction.

In the present embodiment, the support wire 22 located on the vehicle front side of the drive screw 36 is pulled by the pull-in wire 64 on the rail 32, but the support wire 22 located on the vehicle rear side of the drive screw 36 is pulled by the pull-in wire 64. It may be a pulling configuration. In this case, since the pulley 44 and the first gear 46 rotate clockwise, the buckle 20 can be erected by assembling an intermediate gear for reversal between the first gear 46 and the second gear 48. ..

In the present embodiment, since the coupler 66 is provided on the upper side in the longitudinal direction with respect to the rotating shaft 30A, the rail 32 is overturned by pulling the support wire 22 from the front side of the vehicle. However, not limited to this, when the rotating shaft 30A is above the coupler 66, the rail 32 can be overturned by pulling the support wire 22 from the rear side of the vehicle.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above, and it goes without saying that various modifications other than the above can be carried out.

10 ... buckle device, 14 ... pulling unit (acting mechanism), 16 ... tongue, 18 ... webbing, 20 ... buckle, 21 ... buckle base (support part), 22.・ ・ Support wire (connection part), 22A ・ ・ ・ extension part, 26 ・ ・ ・ spring (urging part), 24A ・ ・ ・ first piece (first fixed piece), 24B ・ ・ ・ second piece (first piece) (2) Fixed piece), 30 ... Drive device (moving mechanism), 32 ... Rail (guide), 38 ... Sliding unit (moving body), 44 ... Pulley (rotating body), 46.・ ・ 1st gear, 48 ・ ・ ・ 2nd gear, 64 ・ ・ ・ Pull-in wire (extending part), 66 ・ ・ ・ Coupler (connecting part), 67A ・ ・ ・ Wire guide (cylinder part), 67B ・ ・-Wire end (fixed part), 67C ... Locking claw (claw part), 68 ... Sleeve (tube part), 70 ... Control device (control part)

Claims (7)

A buckle to which the tongue with the webbing attached to the occupant is engaged,
A guide unit that can rotate the buckle side around the floor side and guides the moving body inside.
A moving mechanism for moving the moving body in the guide portion,
A support portion provided outside the guide portion and supporting the buckle, and a support portion.
A connecting portion that connects the moving body and the supporting portion,
An extension part extending outward from the guide part and
An actuating mechanism that moves the extending portion in one direction at the time of a vehicle collision or collision prediction and rotates the guide portion so that the support portion moves toward the front side of the vehicle.
Buckle device with. A connecting portion that connects the extending portion to the connecting portion by moving in the one direction is provided.
The operating mechanism is
When the vehicle collides or predicts a collision, the extending portion is moved in the one direction, the extending portion and the connecting portion are connected by the connecting portion, and the support portion is moved to the front side of the vehicle. The buckle device according to claim 1, wherein the guide portion is rotated. A first gear rotatably supported with respect to the support portion,
A second gear fixed to the buckle and connected to the first gear is provided.
The connection part
From the first fixed piece housed in the moving body, it extends to the support portion along the longitudinal direction of the guide portion, is wound around a rotating body fixed coaxially with the first gear, and is wound from the rotating body. A support wire extending along the longitudinal direction to a second fixing piece housed in the moving body.
Inside the moving body, an urging portion for urging the support wire in the urging direction from the second fixing piece toward the first fixing piece is provided.
The connecting portion is connected to the supporting wire at an extension portion extending from the second fixing piece of the supporting wire in a direction opposite to the urging direction.
The buckle device according to claim 2, wherein when the support wire moves in the opposite direction, the first gear rotates the second gear so that the buckle faces the upper side of the vehicle. The buckle device according to claim 3, wherein the second gear has a smaller diameter than the first gear. The connecting part
The tubular portion through which the support wire penetrates and
A fixed portion that is connected to the tubular portion and to which the extending portion is fixed,
A plurality of claws extending from the cylinder and capable of locking the support wire,
A tube portion and a tube portion capable of accommodating the claw portion are provided.
When the claw portion is not housed in the pipe portion, the claw portion opens to the outer peripheral side of the support wire, the support wire is not locked, and the tubular portion moves in the one direction. The buckle device according to claim 3 or 4, wherein when the claw portion is housed in the pipe portion, the claw portion locks the support wire. The buckle device according to any one of claims 1 to 5, wherein the extending portion is a lead-in wire extending from the guide portion to the front of the vehicle. The buckle device according to any one of claims 1 to 6, further comprising a control unit that invalidates the operation of the operating mechanism when the seat back is raised beyond a predetermined angle.