JP2007210433A - Air belt device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inflate an inflation part to an upward position opposite to the temple part of an occupant by making the center position in the height direction of the inflation part close to the center position in the height direction of the head of the occupant in case of a lateral collision. <P>SOLUTION: A shoulder part of a seat back 26 in a vehicle seat 12 is provided with a belt guide 20, which guides an occupant constraining webbing 16 having the inflation part 18 corresponding to the head 14H of the occupant 14 in inflation, and is movable to the upside of the vehicle by a belt guide moving means. When a lateral collision is detected or estimated, the belt guide 20 is moved to the upside of the vehicle by a predetermined amount by the operation of the belt guide moving means, whereby the center position in the height direction of the inflation part 18 is made closer to the center position in the height direction of the head 14H of the occupant 14 more than before so that the inflation part 18 can be inflated to the upward position opposite to the temple part 14S of the occupant 14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle air belt apparatus having an inflating portion corresponding to a head of an occupant during inflation.

A vehicular airbelt device is disclosed in which an occupant restraining webbing having an inflating portion is inserted into a belt guide disposed on a shoulder portion of a seatback, and the inflating portion is inflated by an inflator fixed to the seatback frame. (See Patent Document 1).
JP-T-2002-527282

  However, in the conventional example described above, the belt guide is formed in a horizontally long shape in accordance with the occupant restraining webbing, which is pressed against the occupant by the tension of the occupant restraining webbing that increases when the inflating part is inflated. Therefore, the expansion part expands widely in the lateral direction, that is, in the vehicle width direction. Therefore, it is difficult to expand the expansion part to an upper position facing the occupant's temporal region as a side collision.

  In consideration of the above-mentioned fact, the present invention brings the inflatable portion to face the occupant's temporal region by bringing the center position in the height direction of the inflatable portion closer to the center position in the height direction of the occupant's head during a side collision. The purpose is to inflate to the upper position.

  According to a first aspect of the present invention, there is provided an occupant restraining webbing corresponding to a chest of an occupant seated on a vehicle seat, an inflating part provided on the occupant restraining webbing and corresponding to the occupant's head when inflated, and the inflation An inflator capable of supplying expansion gas to a part, a side collision sensor for detecting or predicting a side collision, a control means for operating the inflator based on an output signal from the side collision sensor, and the vehicle A belt guide provided on the shoulder portion of the seat back of the seat for guiding the occupant restraining webbing, and the belt guide is moved from the normal use position toward the upper side of the vehicle by a predetermined amount based on the output signal of the side collision sensor. Belt guide moving means.

  In the vehicle air belt device according to the first aspect, the occupant restraining webbing can be guided by the belt guide during normal use. On the other hand, when a side collision to the occupant is detected or predicted by the side collision sensor, the belt guide moves by a predetermined amount from the normal use position toward the upper side of the vehicle by the belt guide moving means. Then, when the inflator is activated and a large amount of gas is ejected from the inflator and the gas is supplied to the inflating portion, the inflating portion is in a state where the height position is regulated by the belt guide that has moved upward in the vehicle. Inflate. Therefore, at the time of a side collision, the center position in the height direction of the inflatable portion can be brought close to the center position in the height direction of the occupant's head, and the inflatable portion can be inflated to an upper position facing the occupant's side head. Is possible.

  According to a second aspect of the present invention, in the vehicle air belt device according to the first aspect, the belt guide moving means is biased by the biasing body that biases the belt guide upward of the vehicle, and the biasing body. A holding body configured to bring the belt guide into a holding state at a normal use position and to be able to release the holding state based on an output signal of the side collision sensor.

  In the vehicle air belt device according to the second aspect, during normal use, the belt guide is constantly urged upward by the urging member, but is held in the normal use position by the holding member. ing. On the other hand, when a side collision to the occupant is detected or predicted by the side collision sensor, the holding state of the belt guide by the holding body is released, and the belt guide moves upward by a predetermined amount by the urging force of the urging body. To do. Then, when the inflator is activated and a large amount of gas is ejected from the inflator and the gas is supplied to the inflating portion, the inflating portion is in a state where the height position is regulated by the belt guide that has moved upward in the vehicle. Inflate. Therefore, in the vehicle air belt device according to the second aspect, at the time of a side collision, the belt guide is moved upward by the urging force of the urging body, so that the center position in the height direction of the inflating portion is set on the occupant's head. It can be brought close to the center position in the height direction, and the inflatable portion can be inflated to an upper position facing the occupant's temporal region.

  According to a third aspect of the present invention, in the vehicular inflatable belt device according to the first aspect, the belt guide moving means operates to move the belt guide in the vehicle vertical direction based on an output signal of the side collision sensor. It is characterized by being an actuator.

  In the vehicle air belt device according to the third aspect, during normal use, the belt guide is held in the normal use position by the actuator. On the other hand, when a side collision to the occupant side is detected or predicted by the side collision sensor, the actuator operates and the belt guide moves a predetermined amount toward the upper side of the vehicle. Then, when the inflator is activated and a large amount of gas is ejected from the inflator and the gas is supplied to the inflating portion, the inflating portion is in a state where the height position is regulated by the belt guide that has moved upward in the vehicle. Inflate. Therefore, in the vehicle air belt device according to the third aspect, when the side collision occurs, the belt guide is moved upward by the actuator, so that the center position in the height direction of the inflatable portion is changed to the center position in the height direction of the occupant's head. The inflatable portion can be inflated to an upper position facing the occupant's temporal region.

  As described above, according to the vehicle airbelt device of the first aspect of the present invention, the center position in the height direction of the inflatable portion is brought close to the center position in the height direction of the head of the occupant during a side collision. An excellent effect is obtained that the inflatable portion can be inflated to an upper position facing the occupant's temporal region.

  According to the vehicle air belt device of the second aspect, the center position of the inflating portion in the height direction is set to the height of the occupant's head by moving the belt guide upward of the vehicle by the urging force of the urging body at the time of a side collision. It is possible to obtain an excellent effect that the inflatable portion can be inflated to an upper position facing the occupant's temporal region near the center position in the vertical direction.

  According to the air belt device for a vehicle according to claim 3, the center position in the height direction of the inflatable portion is brought close to the center position in the height direction of the occupant's head by moving the belt guide upward by the actuator at the time of a side collision. It is possible to obtain an excellent effect of inflating the inflatable portion to an upper position facing the occupant's temporal region.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 (A) and 2 (A), a vehicle air belt device 10 according to the present embodiment is a kind of seat belt for restraining an occupant 14 seated on a vehicle seat 12, and an occupant restraining webbing. 16, an inflating portion 18, an inflator (not shown), a side collision sensor (not shown), a control means (not shown), a belt guide 20, and a belt guide moving means 22 (FIG. 3, FIG. 4 and FIG. 5).

  The vehicle seat 12 includes a seat cushion (not shown) on which the occupant 14 sits, a seat back 26 that supports the back of the occupant 14, and a headrest 28 that is provided on the seat back 26 and corresponds to the head 14H of the occupant 14. Have.

  A lap belt anchor is provided on the outer side of the seat cushion, and a buckle device (not shown) is provided on the center side of the seat cushion. The position where the lap belt anchor and the buckle device are provided is not limited to the seat cushion, and may be on the floor panel side, for example. In the buckle device or outside the buckle device, for example, an inflator (not shown) that is a gas supply source for the inflating portion 18 is disposed. The control means operates the inflator when a side collision is detected by the side collision sensor or when a side collision is predicted by a pre-crash sensor (not shown).

  When the inflating portion 18 is also made to correspond to the chest 14B of the occupant 14, the inflator is activated even when a frontal collision is detected or predicted. In this case, a front-impact inflator and a side-impact inflator may be used separately, or a single inflator with variable output may be used.

  The occupant restraining webbing 16 is a belt-like member corresponding to the chest 14B of the occupant 14, and is configured to be wound around, for example, a retractor (not shown) disposed on the upper back panel of the vehicle body. Sometimes, it can be pulled out of the retractor according to the physique of the occupant 14. During normal use, as shown in FIGS. 1 (A) and 2 (A), the occupant restraining webbing 16 is guided in the guide hole 20A of the belt guide 20 held in the normal use position, and is routed. The direction is regulated.

  The occupant restraining webbing 16 is provided with a tongue plate (not shown) configured to be fitted into the buckle device, and when the tongue plate is fitted into the buckle device, the inflator is moved from the buckle device side to the inflating portion 18. The gas from can be supplied.

  The inflatable portion 18 is a bag body that is provided on the occupant restraining webbing 16 and is folded so as to correspond to the head 14H of the occupant 14 when inflated. Specifically, the inflatable portion 18 is folded in a belt shape equivalent to the occupant restraining webbing 16, and is covered with, for example, a stretchable mesh webbing (not shown) and further covered with a cover (not shown). It is sewn in a band shape. In order to inflate the seat center side close to the head 14H of the occupant 14 at an early stage, the edge portion on the seat center side is sewn by control sewing, that is, a so-called tear seam that breaks when the internal pressure of the inflating portion 18 exceeds a certain level. Also good. In addition, the deployment area of the inflating portion 18 is not limited to the position corresponding to the head 14H of the occupant 14, and may be inflated corresponding to the chest 14B.

  1A and 2A, the belt guide 20 is provided on the shoulder portion of the seat back 26 in the vehicle seat 12, and has a guide hole 20A for guiding the occupant restraining webbing 16. When the side collision occurs, the belt guide moving means 22 moves the vehicle upward by a predetermined amount, and accordingly, the guide hole 20A also moves upward in the vehicle. The guide hole 20A includes, for example, a bottom portion 20B extending in the vehicle width direction, an inner wall portion 20C extending from the seat center side of the bottom portion 20B to the vehicle upper side, and an outer end portion in the vehicle width direction of the inner wall portion 20C and the bottom portion 20B. And an upper edge 20U connecting the two. The upper edge 20U of the belt guide 20 is formed in an upward gradient from the vehicle width direction outer side toward the seat center side. In addition, the shape of the belt guide 20 is not restricted to the thing of illustration. For example, in the illustrated example, the belt guide 20 is formed in an annular shape, but a notch (not shown) for hanging the occupant restraining webbing 16 may be provided.

  As shown in FIGS. 3, 4, and 5, the configuration of the portion of the belt guide 20 that is stored in the seat back 26 in the normal use position differs depending on the configuration of each belt guide moving means 22. This will be described together with the belt guide moving means 22. First, the first example of the belt guide moving means 22 shown in FIG. 3 is biased by the compression coil spring 30 as an example of a biasing body that biases the belt guide 20 upward in the vehicle, and the compression coil spring 30. The belt guide 20 is held in the normal use position, and has a holding pin 32 as an example of a holding body configured to be able to release the holding state based on the output signal of the side collision sensor.

  In the example of FIG. 3, the belt guide 20 is spaced substantially parallel to the vehicle width direction and extends along the vehicle vertical direction, which is the moving direction of the belt guide 20, and the lower ends are connected by a connecting member 24. The leg portions 50 and 52 are provided on a guide portion 42 fixed to the seat back frame 34 by using bolts 38 and nuts 40, for example, from above the seat trim 36. It is supported so as to be slidable in the vehicle vertical direction. On the sliding surface of the leg portions 50 and 52 in the guide portion 42, for example, a bush 44 for smooth sliding of the leg portions 50 and 52 is disposed.

  For example, the compression coil spring 30 is disposed between the base portion 46 provided between the leg portions 50 and 52 above the holding pin 32 in the guide portion 42 and the bottom portion 20B of the belt guide 20. Is in the normal use position, it is compressed in the vehicle vertical direction and constantly urges the belt guide 20 upward.

  The holding pin 32 is inserted into the guide portion 42 and the leg portion 50 below the base portion 46 in consideration of the presence of the compression coil spring 30, for example, and the belt guide 20 is attached to the vehicle based on the output signal of the side collision sensor. In the case of moving upward, when an ignition unit (not shown) is actuated through the wiring 48, the holding pin 32 itself is configured to be detached from the leg part 50 by gunpowder (not shown). Note that the configuration of the holding pin 32 is not limited to this, and it is sufficient that the holding state of the belt guide 20 can be released when the belt guide 20 is moved upward in the vehicle. A configuration may be adopted in which when the acceleration in the width direction acts, the inertial force deviates.

  Next, a second example of the belt guide moving means 22 shown in FIG. 4 includes a compressed gas G that is an example of an urging body that urges the belt guide 20 upward in the vehicle, and a belt urged by the compressed gas G. The holding pin 32 is an example of a holding body configured to bring the guide 20 into the holding state at the normal use position and to be able to release the holding state based on the output signal of the side collision sensor.

  In the example of FIG. 4, the belt guide 20 includes leg portions 50 and 52 that are spaced apart substantially parallel to the vehicle width direction and extend along the vehicle vertical direction that is the moving direction of the belt guide 20. A piston 54 is provided at the lower end of the leg portions 50 and 52. The piston 54 is configured to be slidable in the vehicle vertical direction with respect to the seat back frame 34 in a cylinder 56 fixed using, for example, a bolt 38 and a nut 40 from above the seat trim 36. The compressed gas G is enclosed between the cylinder 56 and the piston 54 when the belt guide 20 is in the normal use position, and the belt guide 20 is constantly urged upward by the pressure.

  The holding pin 32 is fitted, for example, so as to penetrate into the cylinder 56 and holds the piston 54 so as not to move upward in the vehicle by the urging force of the compressed gas G during normal use. Since the configuration of the holding pin 32 itself is as described above, the same portions are denoted by the same reference numerals in the drawings, and description thereof is omitted.

  A third example of the belt guide moving means 22 shown in FIG. 5 is a motor 60 that is an example of an actuator that operates to move the belt guide 20 in the vehicle vertical direction based on the output signal of the collision sensor. For example, a pinion 62 is attached to the shaft 60 </ b> A of the motor 60.

  In the example of FIG. 5, the belt guide 20 has a leg portion 58 extending from the substantially center of the bottom portion 20 </ b> B in the vehicle width direction, and the belt guide 20 is attached to the leg portion 58. A rack 58A having a length corresponding to the amount of movement when moving upward is provided, and the rack 58A meshes with a pinion 62 that is rotationally driven by a motor 60. The leg portion 58 is supported by the guide portion 64 fixed to the seat back frame 34 using, for example, the bolt 38 and the nut 40 from above the seat trim 36 so as to be slidable in the vehicle vertical direction.

  3, 4, and 5, three examples of the belt guide moving means 22 are shown, but the configuration of the belt guide moving means 22 is not limited to these.

(Function)
1A and 2A, in the vehicle air belt device 10, the belt guide 20 is held at the height of the shoulder portion of the seat back 26 when the inflating portion 18 is not inflated, that is, during normal use. Thus, the occupant restraining webbing 16 can be guided by the guide hole 20A of the belt guide 20, and the direction of the steering can be stably regulated.

  In a state where the occupant restraining webbing 16 is mounted, when the side collision sensor receives a side collision from the occupant seating side of the vehicle or such a side collision is predicted, for example, a belt guide moving means 22 shown in FIG. In FIG. 2, an operating current is supplied from the control means to an ignition unit (not shown) through the wiring 48, and the ignition unit is operated. When the ignition unit is activated and explosives (not shown) explode, the holding pin 32 is detached from the leg part 50 and the leg part 50 is released from the holding state by the holding pin 32. Then, the belt guide 20 is smoothly moved by the urging force of the compression coil spring 30 in the upper direction of the vehicle, that is, in the direction of the arrow U until, for example, the connecting member 24 contacts the base portion 46. In this case, the distance D until the connecting member 24 contacts the base portion 46 corresponds to a predetermined amount by which the belt guide 20 moves.

  When the belt guide moving means 22 has the configuration shown in FIG. 4, if a side collision is received from the occupant seating side of the vehicle or such a side collision is predicted, the explosive is as described above. Explode and the holding pin 32 is removed from the cylinder 56, and the piston 54 is released from the holding state by the holding pin 32. Then, the piston 54 is pushed upward in the vehicle, that is, in the direction of the arrow U by the urging force of the compressed gas G, that is, the pressure of the compressed gas G, so that the belt guide 20 moves upward in the vehicle. In this case, the moving stroke of the piston 54 by the compressed gas G corresponds to a predetermined amount by which the belt guide 20 moves. In order to limit the movement stroke of the piston 54, it is desirable to provide a stopper (not shown) at an appropriate position above the cylinder 56.

  Further, in the case where the belt guide moving means 22 has the configuration shown in FIG. 5, if a side collision is received from the passenger seating side of the vehicle or such a side collision is predicted, the motor 60 In operation, the pinion 62 rotates clockwise in FIG. 5, so that the rack 58 </ b> A moves upward in the vehicle, and accordingly, the leg portion 58 moves in the upward direction of the vehicle, that is, in the arrow U direction. The amount of movement of the belt guide 20 is controlled by the total rotation angle of the shaft of the motor 60. As the leg portion 58 moves, the belt guide 20 also moves in the arrow U direction.

  Then, as shown in FIGS. 1B and 2B, when the inflator is activated with the belt guide 20 moving upward in the vehicle, a large amount of gas ejected from the inflator is supplied to the expansion portion 18. As a result, the expansion portion 18 expands. At this time, since the belt guide 20 is moved upward in the vehicle in order to control the inflating region of the inflating portion 18, the center position of the inflating portion 18 in the height direction is higher than the conventional head 14H. The inflatable portion 18 can be brought close to the center position in the direction, and the inflatable portion 18 can be inflated to an upper position facing the side head 14 </ b> S of the occupant 14.

  Since the upper edge 20U of the belt guide 20 is formed in an upward slope from the outer side in the vehicle width direction toward the seat center side, the expansion region on the head 14H side of the expansion portion 18 can be expanded in the vehicle vertical direction. By covering a wider area, it is possible to absorb the inertial force in the vehicle width direction of the head 14H and the like.

  Further, by moving the belt guide 20 to the upper side of the vehicle, the inflating portion 18 is inflated to an upper position facing the side head 14S of the occupant 14, so that the volume efficiency of the inflating portion 18 is improved and the capacity of the inflating portion 18 is increased. Since the folding thickness of the inflatable portion 18 can be suppressed, the operability of the occupant restraining webbing 16 during normal use is improved.

  In the above embodiment, the belt guide 20 has been described as moving upward of the vehicle before the expansion portion 18 is expanded. However, the expansion of the expansion portion 18 and the movement of the belt guide 20 upward of the vehicle are performed simultaneously. Also good.

  Moreover, in the said embodiment, although the compression coil spring 30 and the compressed gas G were mentioned as an example of an urging body, an urging body is not restricted to these. Moreover, although the holding pin 32 was mentioned as an example of a holding body, it is not restricted to this about a holding body. Furthermore, although the motor 60 was mentioned as an example of an actuator, it is not restricted to this, A cylinder apparatus, a solenoid, etc. may be sufficient.

(A) It is a front view which shows the state which this passenger | crew restraint webbing is guided by the belt guide at the time of normal use which the passenger | crew sat down on the vehicle seat and equipped with the passenger | crew restraint webbing. (B) At the time of a side collision, the belt guide moves a predetermined amount upward of the vehicle by the operation of the belt guide moving means, so that the center position in the height direction of the inflating portion is set to the center position in the height direction of the occupant's head than before. It is a front view which shows the state which has approached and this expansion | swelling part is expanding to the upper position facing a passenger | crew's temporal region. (A) It is a perspective view which shows the state which this passenger | crew restraint webbing is guided by the belt guide at the time of normal use which the passenger | crew sat down on the vehicle seat and equipped with the passenger | crew restraint webbing. (B) At the time of a side collision, the belt guide moves a predetermined amount upward of the vehicle by the operation of the belt guide moving means, so that the center position in the height direction of the inflating portion is set to the center position in the height direction of the occupant's head than before. It is a perspective view which shows the state which has approached and this expansion | swelling part is expanding to the upper position facing a passenger | crew's temporal region. It is sectional drawing which shows the structure of the belt guide and belt guide moving means (1st example) in the shoulder part of a seat back. It is sectional drawing which shows the structure of the belt guide and belt guide moving means (2nd example) in the shoulder part of a seat back. It is sectional drawing which shows the structure of the belt guide and belt guide moving means (3rd example) in the shoulder part of a seat back.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vehicle air belt apparatus 12 Vehicle seat 14 Occupant 14H Head 16 Occupant restraint webbing 18 Expansion part 20 Belt guide 22 Belt guide moving means 26 Seat back 30 Compression coil spring (biasing body)
32 Holding pin (holding body)
60 Motor (actuator)
G Compressed gas (energizing body)

Claims (3)

An occupant restraining webbing corresponding to the chest of the occupant seated in the vehicle seat;
An inflatable portion provided on the occupant restraining webbing and corresponding to the occupant's head when inflated;
An inflator capable of supplying an expansion gas to the expansion part;
A side collision sensor for detecting or predicting a side collision;
Control means for operating the inflator based on an output signal from the side collision sensor;
A belt guide provided on a shoulder portion of a seat back in the vehicle seat and guiding the occupant restraining webbing;
Belt guide moving means for moving the belt guide by a predetermined amount from the normal use position toward the upper side of the vehicle based on the output signal of the side collision sensor;
A vehicular airbelt device comprising:   The belt guide moving means is configured to bias the belt guide upward in the vehicle and to hold the belt guide biased by the biasing body in a normal use position and output the side collision sensor. The vehicle air belt device according to claim 1, further comprising: a holding body configured to be able to release the holding state based on a signal.   The vehicular air belt device according to claim 1, wherein the belt guide moving means is an actuator that operates to move the belt guide in a vertical direction of the vehicle based on an output signal of the side collision sensor.

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