JP2010036666A - Vehicular occupant constraint device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular occupant constraint device capable of favorably supplying gas to a plurality of expanding parts from a gas generator. <P>SOLUTION: The vehicular occupant constraint device 10 includes a gas distributing manifold 52 to supply the gas generated by an inflator 50 to a plurality of the expanding parts provided on a webbing for restraining the occupant and to be deployed so as to protect the occupant by receiving the supply of the gas and deploying themselves. A bore diameter of a tube 54 for lapping to supply the gas to a waist expanding part on the gas distributing manifold 52 is set larger than that of a tube 58 for a shoulder to supply the gas to the upper body expanding part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle occupant restraint device for restraining an occupant seated on a seat at the time of a collision to the seat.

A seat belt system having an inflating portion in each of left and right shoulder belts and left and right lap belts is known (see, for example, Patent Document 1).
US Pat. No. 6,705,641 B2 JP 2007-99215 A JP 2007-137181 A JP-A-11-170950 JP-A-9-188221

  However, in the conventional technology as described above, there is room for improvement in the gas supply structure from the inflator to each expansion portion.

  It is an object of the present invention to obtain a vehicle occupant restraint device that can satisfactorily supply gas from a gas generator to a plurality of inflatable portions.

  The vehicle occupant restraint device according to the first aspect of the present invention includes an occupant restraint webbing and a plurality of inflatable portions that are provided on the webbing and deployed so as to be inflated by receiving gas supply to protect the occupant A first pipe portion that communicates the gas generator generation and a part of the plurality of expansion portions, and the first pipe portion has a different flow path cross-sectional area and the gas generation device. A gas distribution structure having a second pipe portion communicating with another part of the plurality of inflating portions.

  In the vehicle occupant restraint device according to claim 1, for example, when a collision occurs in a vehicle applied with the webbing mounted on the occupant, the gas generator is activated, and the gas from the gas generator is It is supplied to a plurality of inflating parts through the distribution structure. The plurality of inflatable portions are each inflated by gas supply and developed into a predetermined shape. The occupant is protected by the inflated portion thus deployed.

  Here, in this vehicle occupant restraint device, the flow passage cross-sectional area (gas flow resistance) is different between the first pipe portion and the second pipe portion constituting the gas distribution structure. In a configuration in which gas is supplied from a common gas generator to a plurality of inflatable portions having different relative expansion settings (when set relative deployment is completed), gas can be supplied according to the capacity of each inflatable portion and the deployment timing. . That is, it is possible to further improve the deployment performance of the plurality of inflatable portions.

  Thus, in the vehicle occupant restraint device according to the first aspect, the gas can be satisfactorily supplied from the gas generator to the plurality of inflating portions.

  A vehicle occupant restraint device according to a second aspect of the present invention is the vehicle occupant restraint device according to the first aspect, wherein the plurality of inflating portions are arranged on left and right sides of a waist restraint portion for restraining a waist portion of the occupant in the webbing. The gas distribution structure includes a pair of waist inflating portions, wherein the first pipe portion communicates with one of the pair of left and right waist inflating portions, and the second tube portion has the pair of left and right waist inflating portions. It communicates with the other side of the expansion part.

  In the vehicle occupant restraint device according to the second aspect, at least the left and right hip inflating portions are provided, and the left and right hip inflating portions are inflated and deployed, so that the occupant's waist is effectively restrained. Since the first pipe portion communicates with one of the left and right hip inflating portions and the second tube portion communicates with the other, for example, gas is supplied to the left and right hip inflating portions having different capacities according to the capacity. be able to.

  The vehicle occupant restraint device according to claim 3 is the vehicle occupant restraint device according to claim 1 or 2, wherein the webbing is a pair of left and right upper body restraints for restraining the upper body of the occupant. And the plurality of inflating portions include a pair of left and right upper body inflating portions respectively provided on a pair of left and right upper body restraining portions of the webbing, and the gas distribution structure includes: The second pipe portion is in communication with the other of the pair of left and right upper body inflating portions.

  In the vehicle occupant restraint device according to claim 3, at least left and right upper body inflating portions are provided, and the left and right upper body inflating portions are inflated and deployed to effectively protect the upper body of the occupant. Is done. Since the first tube portion is communicated with one of the left and right body inflating portions and the second tube portion is communicated with the other, for example, gas is supplied to the left and right upper inflating portions having different capacities according to the capacity. Can be supplied.

  The vehicle occupant restraint device according to a fourth aspect of the present invention is the vehicle occupant restraint device according to any one of the first to third aspects, wherein the plurality of inflating portions are formed by occupant waists in the webbing. A waist inflating portion provided in a waist restraining portion for restraining; and a body inflating portion provided in an upper body restraining portion for restraining an upper body of an occupant in the webbing, the gas distribution structure comprising: The first tube portion communicates with either the waist expansion or the body expansion portion, and the second tube portion communicates with the other of the waist expansion and the body expansion portion.

  In the vehicle occupant restraint device according to claim 4, as the plurality of inflating portions, at least a waist inflating portion and an upper body inflating portion that are arranged vertically are provided, and these left and right upper body inflating portions are inflated and deployed. This effectively protects the occupant. Since the first pipe part is communicated with one of the waist expansion part and the upper body expansion part arranged above and below and the second pipe part is communicated with the other, for example, with respect to the upper and lower expansion parts having different deployment timings Gas can be supplied according to the deployment timing.

  The vehicle occupant restraint device according to the invention described in claim 5 is the vehicle occupant restraint device according to any one of claims 1 to 4, wherein the webbing is a right and left for restraining the upper body of the occupant. A pair of upper body restraining portions, wherein the plurality of inflating portions include a waist inflating portion provided on the waist restraining portion for restraining a waist portion of an occupant in the webbing, and a pair of left and right upper portions of the webbing A pair of left and right upper body inflating portions respectively provided in the body restraining portion, and the gas distribution structure is configured to supply the gas of the gas generator to the pair of left and right waist inflating portions and the pair of left and right upper bodies. It is comprised so that it may supply to each of an expansion part.

  6. The vehicle occupant restraint device according to claim 5, wherein the webbing is provided with a pair of left and right upper body restraint portions and a waist restraint portion to form a four-point seat belt device, and each pair of left and right upper body inflatable portions. And a waist expansion part. As described above, the gas of the gas generator is satisfactorily supplied to each of these expansion portions via the gas distribution structure.

  As described above, the vehicle occupant restraint device according to the present invention has an excellent effect that gas can be supplied satisfactorily from the gas generator to the plurality of inflating portions.

(First embodiment)
A vehicle occupant restraint device 10 as a vehicle occupant restraint device according to a first embodiment of the present invention will be described with reference to FIGS. First, an overall configuration of the vehicle occupant restraint device 10 as a four-point seat belt device will be described, and then a structure in which an air belt device is applied to the four-point seat belt device will be described. In addition, the arrow FR, arrow UP, and arrow W appropriately described in each figure indicate the forward direction (traveling direction), the upward direction, and the vehicle width direction of the automobile to which the vehicle occupant restraint device 10 is applied, respectively. The vehicle seat 11 to which the vehicle occupant restraint device 10 is applied substantially coincides with the front direction, the upward direction, and the width direction.

(Structure as a 4-point seat belt device)
FIG. 5 is a perspective view showing an appearance of a vehicle seat 11 (hereinafter, simply referred to as a vehicle seat 11) to which the vehicle occupant restraint device 10 is applied. 6A shows a front view of the vehicle seat 11 when the occupant is not seated, and FIG. 6B shows a side view of the vehicle seat 11 when the seat is not seated. Is shown. Further, FIG. 7A shows a front view of the vehicle seat 11 in a webbing wearing state by a seated occupant, and FIG. 7B shows a side view of the vehicle seat 11 in a webbing wearing state. Is shown.

  As shown in these drawings, the vehicle occupant restraint device 10 includes a pair of left and right webbings 12 and is configured as a so-called four-point seat belt device. As shown in FIG. 5, each webbing 12 is exposed along the vehicle vertical direction at a portion exposed when the webbing is not attached. Each webbing 12 has its lower end wound around a lower retractor 14 (see FIG. 6A) so that it can be wound and pulled out.

  In this embodiment, a pair of left and right lower retractors 14 are provided corresponding to a pair of left and right webbings 12. In addition, it is also possible to make it the structure which winds up the upper end side of the webbing 12 on either side with a common retractor. Each lower retractor 14 has an axis line along the vehicle width direction on the vehicle seat 11 (seat cushion 18) so that it can follow the posture change of the left and right webbings 12 (lap webbing guides 36 to be described later) with respect to 11. Is rotatably supported.

  On the other hand, the upper end sides of the pair of left and right webbings 12 are respectively folded back by a shoulder webbing guide 20 which will be described later, and are wound around an upper retractor 22 as a winding device provided in the seat back 16 so as to be retractable. Yes. The upper retractor 22 is provided in a pair of left and right webbings 12 corresponding to the pair of left and right webbings 12, and winds the webbing 12 corresponding to the left and right around a winding shaft that is slightly inclined in the vertical direction with respect to the vehicle width direction. . In addition, it is also possible to make it the structure which winds up the upper end side of the webbing 12 on either side with a common retractor.

  Further, the vehicle occupant restraint device 10 includes a buckle device 24 as a webbing detaching device (joining means) for detachably joining the middle portions in the longitudinal direction of the left and right webbing 12. The buckle device 24 is provided in the middle portion in the longitudinal direction of one webbing 12.

A buckle 26 as a locked portion and a tongue plate 28 as a locking portion that can be attached to and detached from the buckle 26 are mainly configured.

  Thus, in the vehicle occupant restraint device 10, the buckle 26 and the tongue plate 28 can be coupled while pulling out the webbing 12 from each of the lower retractor 14 and the upper retractor 22. The buckle 26 and the tongue plate 28 are configured to be held at the upper end of a lap webbing guide 36 described later when the webbing 12 is not attached to the occupant.

  As shown in FIGS. 7A and 7B, the left and right webbings 12 are mainly upper body restraining portions in the vehicle vertical direction above the buckle 26 and the tongue plate 28 constituting the buckle device 24. The shoulder webbing 12A is used as the shoulder webbing 12A, and the lower part of the buckle 26 and the tongue plate 28 is mainly used as the lap webbing 12B as the waist restraining part.

  Further, the vehicle occupant restraint device 10 includes a pair of left and right shoulder webbing guides 20. As shown in FIGS. 5, 6 (A), and 7 (A), the shoulder webbing guide 20 is provided with a pair of left and right webbing 12 corresponding to the pair of left and right webbing 12, and the corresponding webbing 12 is inserted therethrough. The webbing 12 is formed in a thin flat cylindrical shape in the thickness direction. The shoulder webbing guide 20 is made of, for example, a resin material.

  Each shoulder webbing guide 20 is rotatably supported at the upper end of the seat back 16 via a motor actuator 32 that constitutes a guide driving means, in the vehicle vertical direction when the webbing is not attached. On the other hand, the end of the shoulder webbing guide 20 opposite to the motor actuator 32 is a webbing guide 20A where the inserted webbing 12 is folded (wound).

  Then, the shoulder webbing guide 20 is rotated around the drive shaft of the motor actuator 32, so that the first position shown in FIGS. 6A and 6B is the storage position, and FIGS. It is configured to be able to take a mounting preparation position (webbing mounting position) as the second position shown in FIG.

  Specifically, as shown in FIGS. 6A and 6B, the posture of the shoulder webbing guide 20 taking the storage position is raised with respect to the upper end portion 16A of the seat back 16 and the webbing guide portion. The posture is inclined in front view so that 20A is positioned on the outer side in the seat width direction from the lower end 20B (motor actuator 32) side in the vehicle vertical direction. In this embodiment, the webbing guide portion 20 </ b> A of each shoulder webbing guide 20 that takes the storage position is located outside the seatback 16 in the width direction. Further, as shown in FIG. 6 (B), the webbing guide portion 20A of each shoulder webbing guide 20 taking the storage position is rearward in the vehicle front-rear direction than the front surface 16B and the front surface 34A of the headrest 34 in the vicinity of the upper end of the seat back 16. Arranged on the side.

  On the other hand, as shown in FIGS. 7A and 7B, the posture of the shoulder webbing guide 20 taking the mounting preparation position is laid down with respect to the upper end portion 16A of the seat back 16, and the left and right webbing guide portions 20A are The webbing guide portion 20A is positioned in front of the seat occupant P in the vehicle front-rear direction as viewed from the side, while being positioned within the shoulder width range of the seat occupant P when viewed from the front. Further, in this posture, the webbing guide portion 20A is located above the shoulder of the seated person P in the vehicle vertical direction.

  Further, the vehicle occupant restraint device 10 includes a pair of left and right lap webbing guides 36. The lap webbing guide 36 is formed in a flat cylindrical shape that is flat in the thickness direction (sheet width direction) of the lower part of the webbing 12 in the retracted state, and the lower part of the webbing 12 in the retracted state, that is, a part of the lap webbing 12B is inserted therein. I am letting. In the vicinity of the lower end 36A, the lap webbing guide 36 is rotatable relative to the vehicle seat 11 about an axis along the seat width direction via a motor actuator 38 (see FIG. 6A). Is supported by the seat frame.

  Then, the lap webbing guide 36 is rotated around the drive shaft of the motor actuator 38, whereby the retracted position as the first position shown in FIGS. 6A and 6B and the position shown in FIG. And it is set as the structure which can take the mounting preparation position (webbing mounting position) as a 2nd position shown by FIG. 7 (B).

  Specifically, as shown in FIGS. 6 (A) and 6 (B), the lap webbing guide 36 in the retracted position has a standing posture (slightly tilted posture) along the side surface of the seat back 16. Has been. In other words, each lap webbing guide 36 taking the storage position is disposed outside the seat back 16 in the width direction and behind the front surface 16C at the lower end of the seat back 16 in the vehicle front-rear direction. On the other hand, as shown in FIGS. 7A and 7B, the posture of the lap webbing guide 36 taking the mounting preparation position is a forward leaning posture in which the upper end 36B is located on the front side in the vehicle longitudinal direction with respect to the lower end 36A. It is said that. In this embodiment, the lower retractor 14 is connected to the corresponding lap webbing guide 36 so that the lower retractor 14 follows the switching between the storage position and the mounting preparation position of the lap webbing guide 36.

  As described above, in the vehicle occupant restraint device 10, when the shoulder webbing guide 20 and the lap webbing guide 36 take the respective storage positions, the exposed portion of the webbing 12 is viewed from the front as a whole as shown in FIG. The seat back 16 is arranged on the outer side in the width direction, and is arranged so as to overlap the thickness range of the seat back 16 as a whole in a side view. In other words, in the vehicle occupant restraint device 10, when the shoulder webbing guide 20 and the lap webbing guide 36 take the respective retracted positions, the left and right webbings 12 are positioned on the sides of the seat back 16 and the headrest 34, respectively. It is configured.

  In this embodiment, the width of the upper end portion 16A of the seat back 16 is set larger than the assumed shoulder width of the seated person P. Therefore, when each shoulder webbing guide 20 takes each storing position, the left and right webbings 12 are configured to be positioned outside the shoulder width of the seated person P, respectively. Accordingly, the vehicle occupant restraint device 10 is configured such that the webbing 12 is not positioned in the seating space and the boarding / exiting space when each shoulder webbing guide 20 takes its respective storage position.

  On the other hand, in the vehicle occupant restraint device 10, when each shoulder webbing guide 20 takes the mounting preparation position, the shoulder of the seated person P is between the front surface of the seat back 16 (including the front surface 16 </ b> B at the upper end) and the webbing 12. It is the structure in which the space which puts (upper body) is formed. When the vehicle occupant restraint device 10 joins the buckle 26 of the buckle device 24 and the tongue plate 28 with the shoulder of the seated person P in the space, the vehicle occupant restraint device 10 is shown in FIGS. 7A and 7B. As shown, the webbing 12 is configured to be mounted on the seated person P.

  In order to be able to move from the storage position to the mounting preparation position, the drive axis of the motor actuator 32 is inclined in at least one of the vehicle vertical direction and the vehicle front-rear direction with respect to the seat width direction (seat width direction). The outer end extends along a slanting direction located below or in front of the inner end (not shown). For example, the motor actuator 32 can be rotated forward and backward so as to rotate forward to displace the shoulder webbing guide 20 from the storage position to the mounting preparation position, and reverse to displace the shoulder webbing guide 20 from the mounting preparation position to the storage position. It is supposed to be configured.

  Further, in the vehicle occupant restraint device 10, the buckle 26 and the tongue plate 28 constituting the buckle device 24 are configured to maintain the vehicle vertical position in the retracted state by the upper end 36 </ b> B of the corresponding lap webbing guide 36. ing. In the vehicle occupant restraint device 10, when the lap webbing guide 36 is positioned at the mounting preparation position, the buckle 26 and the tongue plate 28 reach a position where they can be easily gripped by the seated person P. ing. Further, the lap webbing guide 36 is made of, for example, a resin material and has a flexibility in the flat direction. Therefore, when the buckle 26 and the tongue plate 28 of the buckle device 24 are connected, the lap webbing guide 36 is bent toward the seated person P side as shown in FIG. It is configured.

  Furthermore, the vehicle occupant restraint device 10 includes an ECU 40. As shown in FIG. 9, the ECU 40 is electrically connected to a seating sensor 42 (see FIGS. 6A and 6B) as seating detection means and motor actuators 32 and 38. Then, when a signal corresponding to the seated person P sitting on the vehicle seat 11 is input from the seating sensor 42, the ECU 40 moves the shoulder webbing guide 20 from the retracted position to the mounting preparation position. Control to rotate the actuator 32 forward is performed.

  In the vehicle occupant restraint device 10, the ECU 40 is also electrically connected to a buckle sensor that is incorporated in the buckle device 24 (buckle 26) and outputs at least a signal corresponding to the release of the buckle device 24. When the ECU 40 receives a signal corresponding to the release of the connection of the buckle device 24 from the buckle sensor of the buckle device 24, each shoulder webbing guide 20 is displaced from the mounting preparation position to the storage position. The motor actuator 32 is reversely controlled.

  The vehicle occupant restraint device 10 described above can be applied to each vehicle seat 11 in the driver's seat, the passenger seat, and the rear seat (second row or the third row and thereafter). Further, in this vehicle occupant restraint device 10, the shoulder webbing guide 20 and the lap webbing guide 36 located at the retracted position limit the amount of winding to the lower retractor 14 and upper retractor 22 of the left and right webbings 12. ing. Therefore, in the vehicle occupant restraint device 10, the amount of winding of the left and right webbings 12 to the lower retractor 14 and the upper retractor 22 accompanying the shift from the mounting preparation position to the retracted position is small, and a shoulder airbelt 44 and a lap described later The installation range of the air belt 46 is widened.

(Structure as an air belt device)
As shown in FIGS. 5 to 7, in the vehicle occupant restraint device 10, the shoulder webbing 12A is provided with a shoulder air belt 44 as an inflating portion (upper body inflating portion), and the lap webbing 12B has an inflating portion (waist). A lap air belt 46 is provided as an inflatable portion.

  The shoulder air belt 44 is in a state in which the shoulder webbing guide 20 and the lap webbing guide 36 are located at the mounting preparation position (a state in which the shoulder webbing 12A is close to a state where the shoulder webbing 12A is mounted on the occupant P). It is provided over a range extending to the vicinity (directly below). The lap air belt 46 extends from the vehicle width direction inner end (buckle 26, tongue plate 28) to the vehicle width direction outer end (near the width direction end of the seat cushion 18) when the lap webbing 12B is attached to the occupant. It is provided over a range. That is, a part of the lap air belt 46 is arranged in the lap webbing guide 36.

  Therefore, as shown in FIG. 5, the lap webbing guide 36 in the present embodiment is formed with a tier portion 48 serving as a breakage base point for allowing the lap air belt 46 to expand and deploy.

  Each shoulder airbelt 44 and lap airbelt 46 is a cover having a seam portion in which a folded bag body that is inflated and expanded upon receiving a gas supply from an inflator 50 described later is broken as the bag body expands. It is configured to be covered. In the following description, the explanation will be made mainly based on the deployed state of the shoulder air belt 44 and the lap air belt 46. Therefore, the shoulder air belt 44 and the lap air belt 46 are the above-described bag bodies (those that are not covered with the cover when not operating). It shall be synonymous.

  When the shoulder air belt 44 is supplied with gas from an inflator 50 described later, as shown in FIG. 8, the shoulder air belt 44 is inflated in front of the chest of the occupant P and is deployed so as to protect the occupant P from the front side. Has been. When the lap air belt 46 is supplied with gas from an inflator 50 described later, as shown in FIG. It is set as the structure expand | deployed so that it may restrain.

  Further, the vehicle occupant restraint device 10 includes an inflator 50 as a gas generator that generates gas when activated. In this embodiment, as shown in FIGS. 1 to 3, the inflator 50 is arranged at the center in the seat width direction at the lower part of the seat cushion 18 so as to be longitudinal in the seat front-rear direction. The inflator 50 has a rear end portion serving as a gas discharge port.

  Further, as shown in FIGS. 1 to 3, the vehicle occupant restraint device 10 distributes (supplies) the gas generated by the inflator 50 to the left and right shoulder air belts 44 and the left and right lap air belts 46. And a gas distribution manifold 52 as a distribution structure. 1 to 3 are views in which a part of the skin (including a case of a backboard made of resin, etc.) of the vehicle seat 11 is removed in order to show the gas distribution manifold 52.

  As shown in FIG. 4, the gas distribution manifold 52 is provided at a longitudinally central portion of the wrap tube portion 54 as a waist expansion portion gas supply portion and a lap tube portion 54 which is elongated in the seat width direction. The main part is an inlet tube portion 56 and a pair of left and right shoulder tube portions 58 as upper body expanding portion gas supply portions branched upward from the left and right sides of the inlet tube portion 56 in the wrap tube portion 54. Has been.

  As shown in FIGS. 1 to 3, the wrap tube portion 54 is arranged behind the seat cushion 18 constituting the vehicle seat 11 and below the seat back 16. The inlet tube portion 56 protrudes forward in the seat front-rear direction with respect to the wrap tube portion 54, and the front end thereof is connected to the rear end portion of the inflator 50, that is, the gas discharge port in an airtight state. As a result, the gas generated by the inflator 50 is introduced from the inlet tube portion 56 to the wrap tube portion 54 and branched from the wrap tube portion 54 to a pair of left and right shoulder tube portions 58, and left and right shoulder air belts 44. The lap air belt 46 is supplied with gas.

  Specifically, at both ends in the longitudinal direction of the wrap tube portion 54, a lap gas supply portion 55 is provided so as to be inserted into the lap webbing guide 36 as shown in FIGS. ing. Although illustration is omitted, the lap gas supply unit 55 is connected to the lap air belt 46 in an airtight state inside the lap webbing guide 36. In the middle part of the lap gas supply part 55, flexibility as a flexible member is allowed so as to allow movement between the storage position and the preparation position of the lap webbing guide 36 (see the imaginary line in FIG. 3). A tube 62 is provided. As the flexible tube 62, for example, a rubber tube made of synthetic rubber or the like, a flexible tube having a bellows or a spiral wall portion, or the like can be used.

  In addition, a shoulder gas supply unit 60 that is bent forward so as to be inserted into the shoulder webbing guide 20 is provided at the upper end of the pair of left and right shoulder tube portions 58. Although not shown, the shoulder gas supply unit 60 is connected to the shoulder air belt 44 in an airtight state inside the shoulder webbing guide 20. The intermediate portion of the lap gas supply unit 55 is flexible as a flexible member so as to allow movement between the storage position of the shoulder webbing guide 20 and the mounting preparation position (see the imaginary line in FIG. 3). A tube 62 is provided.

  Further, the gas distribution manifold 52 is also provided with a flexible tube 62 in the vicinity of the lower ends of the left and right shoulder tube portions 58. The flexible tube 62 allows the gas distribution manifold 52 to tilt (reclin) the seat back 16 with respect to the seat cushion 18.

  As described above, in the vehicle occupant restraint device 10, the gas generated by the single inflator 50 is supplied to the left and right lap tube portions 54 and the left and right shoulder tube portions 58 via the gas distribution manifold 52 as described above. It is the composition which is done. Further, in this embodiment, the inner diameter (flow channel cross-sectional area) of the wrapping tube portion 54 (the wrapping gas supply portion 55) as the first tube portion or the second tube portion is the second tube portion or the first tube portion. The inner diameter of the left and right shoulder tube portions 58 (shoulder gas supply portions 60) is larger than the shoulder air belt 44, and the gas flow resistance (pressure loss) to the lap air belt 46 is smaller than the shoulder air belt 44. Yes.

  The inflator 50 described above is electrically connected to the ECU 40, and the operation is controlled by the ECU 40. Specifically, as shown in FIG. 9, the inflator 50 includes, in addition to the motor actuators 32 and 38 and the seating sensor 42, a front collision sensor 64 and a buckle 26 for detecting or predicting a front collision of an applied automobile. And the tongue plate 28 are electrically connected to the buckle sensor 66 and the inflator 50, which output signals corresponding to the connection between the tongue plate 28 and the tongue plate 28, respectively. When the ECU 40 determines that the buckle 26 and the tongue plate 28 are coupled based on the signal from the buckle sensor 66 and that a front collision has occurred or is unavoidable based on the signal from the front collision sensor 64, the inflator 50. It is set as the structure which operates.

  As described above, in the vehicular occupant restraint device 10, the shoulder air belt 44 and the lap air belt 46 are inflated and deployed as shown in FIG. 8 by the gas supply from the inflator 50 at the time of the applied vehicle front collision. The occupant is protected by a shoulder air belt 44 and a lap air belt 46. In this embodiment, the ECU 40 is also electrically connected to the upper retractor 22 and the lower retractor 14. The ECU 40 indicates that the buckle 26 and the tongue plate 28 are coupled based on a signal from the buckle sensor 66 (buckle ON signal), and that a front collision has occurred based on the signal from the front collision sensor 64 or is unavoidable. When it is determined (when a front collision signal is input), the pretensioner devices provided in the upper retractors 22 and the lower retractors 14 are operated.

  Next, the operation of the first embodiment will be described.

  In the vehicle occupant restraint device 10 configured as described above, the left and right shoulder webbing guides 20 and the lap webbing guide 36 are shown in FIGS. 6A and 6B when the occupant is not seated on the applied vehicle seat 11. ) As shown in FIG. Therefore, the exposed portions of the left and right webbings 12 are positioned on the sides of the seat back 16. That is, in a non-sitting state of the occupant on the vehicle seat 11 (before being seated on the vehicle seat 11 and after the webbing 12 is released), the webbing 12 is retracted from the occupant's getting-on / off space. Therefore, in a vehicle to which the vehicle occupant restraint device 10 is applied, the passenger can easily get on and off the vehicle seat 11.

  In the vehicle occupant restraint device 10, when the occupant is seated on the vehicle seat 11 from the state where the left and right shoulder webbing guides 20 and the lap webbing guide 36 are in the retracted position, a signal corresponding to the seating from the seating sensor 42 to the ECU 40. Is entered. The ECU 40 to which this signal is input causes the motor actuator 32 and the motor actuator 38 to rotate forward by a predetermined amount. Then, the left and right shoulder webbing guides 20 and the lap webbing guides 36 are moved to the respective mounting preparation positions.

  By moving the shoulder webbing guide 20 from the retracted position to the mounting preparation position, the webbing guide portion 20A is located outside the shoulder width of the seated person P (occupant) and within the range of the shoulder width of the seated person P from the upper rear side of the shoulder. And is displaced so as to wrap around the upper front side of the shoulder. Therefore, in the vehicle occupant restraint device 10, the upper portion of the exposed portion of the webbing 12 that is folded back by the webbing guide portion 20 </ b> A (the upper end of the exposed portion is supported by the webbing guide portion 20 </ b> A) is outside the shoulder width of the seated person P. And from the upper rear side to the front of the shoulder of the seated person P.

  Further, by moving the lap webbing guide 36 from the retracted position to the mounting preparation position, the buckle 26 and the tongue plate 28 held in the vicinity of the upper end 36B of the lap webbing guide 36 reach a position where the seated person P can easily grip the lap webbing guide 36. Then, when the seated person P joins the buckle 26 and the tongue plate 28, the webbing 12 is properly attached to the seated person P as shown in FIGS. 7 (A) and 7 (B). That is, the shoulder webbing 12 </ b> A mainly restrains the upper body of the seated person P, and the lap webbing 12 </ b> B mainly wears the waist of the seated person P.

  As described above, the vehicle occupant restraint device 10 includes the shoulder webbing guide 20 that can take the storage position and the mounting preparation position, so that the webbing 12 can be placed on the shoulder of the seated person P from the outside of the seated space of the seated person P. Can be moved in front of. That is, the webbing 12 can be moved in front of the shoulder without interfering (hanging) with the seated person P, and the seatback 16 from the front of the shoulder without interfering (hanging) with the seated person P. Can be retracted to the side. Moreover, in the vehicle occupant restraint device 10, the ECU 40 automatically moves the left and right shoulder webbing guides 20 from the respective storage positions to the mounting preparation positions based on the signal from the seating sensor 42, so that the seated person P moves to the webbing 12. Preparation for mounting is performed without touching, and the seated person can easily mount the webbing 12 only by connecting the buckle device 24. Further, in the vehicle occupant restraint device 10, the webbing guide portion 20 </ b> A of the shoulder webbing guide 20 is positioned in front of the shoulder of the seated person P in the use position, so that the webbing 12 is not wound around the shoulder of the seated person P. The feeling of pressure (feeling of winding) by the webbing 12 of the seated person P is small.

  On the other hand, when the seated person P releases the coupling of the buckle device 24, a buckle release signal is input to the ECU 40 from the buckle sensor of the buckle device 24. Each lap webbing guide 36 returns from the curved state constituting the lap webbing 12B by its own restoring force, and moves the buckle 26 and the tongue plate 28 to the outside in the width direction of the vehicle seat 11.

  When a signal from the buckle sensor is input, that is, when the seated person P's intention to get off is estimated, the ECU 40 reverses the motor actuator 32 and the motor actuator 38 by a predetermined amount. Then, the left and right shoulder webbing guides 20 are returned from the respective mounting preparation positions to the storage positions, and the left and right lap webbing guides 36 are returned from the respective mounting preparation positions to the storage positions. As the shoulder webbing guide 20 moves from the mounting preparation position to the retracted position, the webbing guide portion 20A is within the shoulder width of the seated person P and outside the shoulder width of the seated person P (occupant) from the upper front side of the shoulder. And is displaced to the upper rear side of the shoulder. Thereby, the wearing of the webbing 12 by the seated person P is released.

  As described above, in the vehicle occupant restraint device 10, the ECU 40 moves the left and right shoulder webbing guides 20 from the respective mounting preparation positions to the storage position when the buckle sensor detects the release of the connection of the buckle device 24. After the connection of the device 24 is released, the wearing of the webbing 12 is automatically released without the seated person P touching the webbing 12.

  In the vehicle occupant restraint device 10 configured as described above, the ECU 40 activates the inflator 50 and the upper retractor 22 when the buckle ON signal is input from the buckle sensor 66 and the front collision signal is input from the front collision sensor 64. And each pretensioner of the lower retractor 14 is operated. Then, the shoulder webbing 12A and the lap webbing 12B are forcibly wound around the upper retractor 22 and the lower retractor 14, and the shoulder webbing 12A and the lap webbing 12B are brought into close contact with the occupant P.

  The gas generated by the inflator 50 is supplied to the shoulder air belt 44 and the lap air belt 46 through the corresponding flexible tubes. As a result, the left and right shoulder air belts 44 and the lap air belt 46 are inflated and developed into their respective predetermined shapes. Thus, in the vehicle occupant restraint device 10, the waist of the occupant P is restrained to the vehicle seat 11 by the lap webbing 12B and the seat back 16, and the upper body of the occupant P is secured by the shoulder webbing 12A. The upper body of the occupant P is protected against a front collision by the shoulder air belt 44.

  At this time, in the vehicle occupant restraint device 10, the single inflator 50 for supplying gas to the left and right shoulder air belts 44 and the left and right lap air belts 46 is disposed below the seat cushion 18. The lap air belt 46 close to the vehicle can be expanded and deployed in a short time, and the waist of the occupant P can be restrained in a short time after the front collision (detection or prediction). As a result, in the vehicle occupant restraint device 10, the waist of the occupant P is firmly restrained by the lap air belt 46 (and the lap webbing 12B), and the state of the occupant P is well restrained by the shoulder webbing 12A. The upper body of the occupant P can be effectively protected against a front obstacle or the like by the shoulder air belt 44.

  Since the vehicle occupant restraint device 10 includes the gas distribution manifold 52, the gas generated by the single inflator 50 can be supplied to the left and right shoulder air belts 44 and the left and right lap air belts 46, respectively. In particular, since the inner diameter of the wrap tube portion 54 is larger than the inner diameter of the shoulder tube portion 58, the waist portion of the occupant P can be restrained in a short time after the front collision (detection or prediction), and occupant protection performance. It contributes to the improvement.

  In the vehicle occupant restraint device 10, since the gas distribution manifold 52 is formed substantially symmetrically with respect to the inlet tube portion 56, the left and right lap air belts 46 are deployed almost simultaneously in a short time, The shoulder air belt 44 can be deployed almost simultaneously. For this reason, in the structure which supplies gas to the several air belts 44 and 46 with the single inflator 50, in the passenger | crew restraint apparatus 10 for vehicles, a passenger | crew's protection performance is high. Particularly, the deployment timing of the plurality of air belts 44 and 46 can be controlled (set) by the mechanical configuration of the gas distribution manifold 52, and the reliability is high.

  As described above, in the vehicle occupant restraint device 10 according to the first embodiment, the gas can be satisfactorily supplied from the single inflator 50 to the left and right shoulder air belts 44 and the left and right lap air belts 46. This contributes to further improving the overall deployment performance of the shoulder air belt 44 and the left and right lap air belts 46. Further, in the vehicle occupant restraint device 10, the vehicle occupant restraint device 10 is disposed at the center in the vehicle width direction at the lower portion of the seat cushion 18 so as to be longitudinal along the seat front-rear direction. The space below 18 can be used effectively. For example, in a vehicle in which rear seats (second row, third row, etc.) are arranged behind the vehicle seat 11, a foot space for the rear seat occupant is secured.

  Here, in the vehicle occupant restraint device 10, since the gas distribution manifold 52 is partially configured with the flexible tube 62, the function of supplying gas to the left and right shoulder air belts 44 and the lap air belt 46. The posture change of the vehicle seat 11 and the webbing 12 can be allowed while maintaining the above.

  Specifically, in the vehicle occupant restraint device 10, the flexible tube 62 provided in the lap gas supply unit 55 allows the lap webbing guide 36 to move between the storage position and the mounting preparation position, and the shoulder The flexible tube 62 provided in the gas supply unit 60 allows the shoulder webbing guide 20 to move between the storage position and the mounting preparation position, and can be provided at the proximal ends of the left and right shoulder tube portions 58. The flexible tube 62 allows the seat back 16 to recline with respect to the seat cushion 18.

(Other embodiments)
Next, another embodiment of the present invention will be described. Parts and portions that are basically the same as those in the first embodiment or the above-described configuration are denoted by the same reference numerals as those in the first embodiment or the above-described configuration, and are not described or illustrated. There is a case.

(Second Embodiment)
FIG. 10 is a perspective view corresponding to FIG. 4 showing a gas distribution manifold 72 constituting a vehicle occupant restraint device 70 according to a second embodiment of the present invention. As shown in this figure, the gas distribution manifold 72 includes a trident tube portion 74 formed in a substantially Y shape in front view, instead of the pair of left and right shoulder tube portions 58. Different from the gas distribution manifold 52 in the first embodiment.

  Specifically, the trifurcated tube portion 74 has a forked tube portion 76 as a branch pipe portion branched from the longitudinal center of the wrap tube portion 54 at the lower end and a bifurcated shape from the upper end of the gas distribution manifold 72. The shoulder tube portion 78 as a gas supply portion for the left and right pair of upper and lower body restraint portions is formed in a substantially Y shape in front view as described above. The left and right shoulder tube portions 78 as the first tube portion or the second tube portion have a smaller diameter than the wrap tube portion 54 as the second tube portion or the first tube portion. The rising tube portion 76 has a larger diameter than the left and right shoulder tube portions 58.

  The gas distribution manifold 72 is provided with a shoulder gas supply portion 60 at the upper ends of the left and right shoulder tube portions 78, respectively, and a base end portion of the rising tube portion 76 (the branch portion from the wrap tube portion 54). In the vicinity), a shoulder gas supply unit 60 is provided. Other configurations of the vehicle occupant restraint device 70 are the same as the corresponding configurations of the vehicle occupant restraint device 10.

  Therefore, also by the vehicle occupant restraint device 70 according to the second embodiment, the same effect can be obtained basically by the same operation as the vehicle occupant restraint device 10 according to the first embodiment. Further, since the vehicle occupant restraint device 70 has the trident tube portion 74 (the rising tube portion 76 and the left and right shoulder tube portions 78), in other words, from the wrap tube portion 54 to the left and right shoulder air belts 44. Since a part of the gas supply path is made common as the rising tube portion 76, the overall configuration can be made lighter than the vehicle occupant restraint device 10 having the gas distribution manifold 52. Moreover, since the shoulder gas supply part 60 for allowing the reclining of the vehicle seat 11 to be provided in the rising tube part 76 is sufficient, the cost can be reduced.

(Third embodiment)
FIG. 11 is a perspective view corresponding to FIG. 4 showing a gas distribution manifold 82 constituting a vehicle occupant restraint device 80 according to a third embodiment of the present invention. As shown in this figure, the gas distribution manifold 82 is provided with a lap gas supply portion 55 at one end in the longitudinal direction of the lap tube portion 54 and at the other end in the longitudinal direction of the lap tube portion 54. It differs from the gas distribution manifold 72 in the second embodiment in that a lap gas supply unit 84 is provided instead of the lap gas supply unit 55.

  The gas distribution manifold 82 is formed such that the inner diameter of the lap gas supply section 84 is larger than the inner diameter of the lap gas supply section 55. In this embodiment, the gas distribution manifold 82 has a lap gas supply portion 84 positioned on the side door 85 side (vehicle width direction outer side) of the vehicle seat 11 and the center console (console box) 86 side (vehicle width direction inner side). ) Is configured such that the lap gas supply unit 55 is located at the same position.

  Further, as shown in FIG. 12, the vehicle occupant restraint device 80 includes left and right lap air belts 88 instead of the left and right lap air belts 46. The left and right lap air belts 88 are deployed until they contact the side door 85 and the center console 86, and support the waist of the occupant P and the shoulder air belt 44 from the outside in the seat width direction. Thereby, in the vehicle occupant restraint device 80, the shoulder air belt 44 is supported from the outside in the seat width direction by the left and right lap air belts 88 that are deployed first, and the position of the shoulder air belt 44 with respect to the upper body of the occupant is unlikely to occur. Has been.

  In the vehicle occupant restraint device 80, the lap air belt 88 on the center console 86 side has a smaller capacity than the lap air belt 88 on the side door 85 side. That is, in the vehicle occupant restraint device 80, the gas distribution manifold 82 is connected to the lap air belt 88 having a relatively small capacity with the lap gas supply section 55 as the first pipe section or the second pipe section, and relatively A lap gas supply section 84 as a second pipe section or a first pipe section is connected to a large capacity lap air belt 88. Other configurations of the vehicle occupant restraint device 80 are the same as the corresponding configurations of the vehicle occupant restraint device 70 (vehicle occupant restraint device 10).

  Therefore, also by the vehicle occupant restraint device 80 according to the third embodiment, the vehicle occupant restraint device 70 according to the second embodiment (the vehicle occupant restraint device 10 according to the first embodiment) basically. Similar effects can be obtained by similar actions. Further, in the vehicle occupant restraint device 80, the occupant is effectively protected by the lap air belt 88 on the side of the side door 85 that expands and contacts the side door 85 and the center console 86.

  And in the structure provided with a pair of lap air belts 88 with different capacities on the left and right, the diameters of the lap gas supply portions 55 and 84 provided at both ends of the lap tube portion 54 are in accordance with the capacity of the lap air belt 88 connected. Since they are different, the gas corresponding to the capacity can be supplied to the pair of lap air belts 88. That is, the mechanical configuration of the gas distribution manifold 82 allows appropriate gas distribution without relying on electrical control or the like.

  In the third embodiment, the left and right lap air belts 88 have different capacities, but the present invention is not limited to this. For example, the left and right shoulder air belts 44 may have different capacities. Specifically, the shoulder air belt 44 on the side door 85 side may be configured to be larger than that on the center console 86 side so as to protect the occupant's upper body and head in the event of a side collision. . In this case, if the shoulder tube portion 78 and the shoulder gas supply portion 60 on the side door 85 side are configured to have a larger diameter than the shoulder tube portion 78 and the shoulder gas supply portion 60 on the center console 86 side. good.

(Fourth embodiment)
FIG. 13 shows a vehicle occupant restraint device 90 according to a fourth embodiment of the present invention in a plan view corresponding to FIG. As shown in this figure, the vehicle occupant restraint device 90 is disposed along the seat width direction at a position where the inflator 50 is offset from the front end portion of the lower portion of the seat cushion 18 and the center in the seat width direction. Thus, it is different from the vehicle occupant restraint device 10 according to the first embodiment.

  The inflator 50 as a whole is disposed on one side with respect to the center in the width direction of the seat cushion 18, and is connected to the inlet tube portion 56 of the gas distribution manifold 52 via the gas tube 92. Other configurations of the vehicle occupant restraint device 90 are the same as the corresponding configurations of the vehicle occupant restraint device 10.

  Therefore, also by the vehicle occupant restraint device 90 according to the fourth embodiment, a similar effect can be obtained by basically the same operation as that of the vehicle occupant restraint device 10 according to the first embodiment. Further, in the vehicle occupant restraint device 90, the inflator 50 hardly affects the sitting comfort of the occupant's buttocks. For this reason, even when the vehicle occupant restraint device 90 is applied to the relatively thin seat cushion 18, it is possible to secure the occupant's sitting comfort on the vehicle seat 11 while securing the foot space of the rear seat occupant. Is possible. Such an arrangement of the inflator 50 may be applied to the vehicle occupant restraint devices 70 and 80 according to the second and third embodiments.

  In each of the above-described embodiments, an example in which the vehicle seat 11 can be reclined is shown. However, the present invention is not limited to this, and for example, the present invention is applied to a seat in which the posture of the seat back 16 with respect to the seat cushion 18 is constant. It goes without saying that the invention can be applied. In this case, setting of the flexible tube 62 to the left and right shoulder tube portions 58 and the rising tube portion 76 becomes unnecessary.

  In the above-described embodiment, the example in which the present invention is applied to the configuration in which the shoulder air belt 44 and the lap air belts 46 and 88 are provided on the basis of the four-point seat belt device is shown, but the present invention is not limited to this. For example, the configuration in which the inflator 50 is disposed along the seat front-rear direction at the center portion in the seat width direction at the lower portion of the seat cushion 18, or the capacity and deployment timing of the shoulder air belt 44 and the lap air belts 46 and 88 to be connected. Accordingly, the configuration including the tube portion 54 for wrap and the gas distribution manifolds 72 and 82 configured by combining tube portions having different inner diameters may be applied to an air belt device based on a three-point seat belt device. Shoulder air belt 44 and lap air belt 4 based on a point seat belt device It may be applied to the air belt apparatus having only one of the (lap airbelt 88).

  Further, in each of the above-described embodiments, the example in which the vehicle occupant restraint device 10 and the vehicle occupant restraint device 10 have the shoulder webbing guide 20 (motor actuator 32) and the lap webbing guide 36 (motor actuator 38) is shown. The present invention is not limited to this, and may be configured such that one or both of the shoulder webbing guide 20 and the lap webbing guide 36 are not provided.

  Furthermore, in the above-described embodiment, the example in which the inlet tube portion 56 is provided at the position where the gas distribution manifolds 52, 72, and 82 are symmetrical is shown. However, the present invention is not limited to this, and for example, a wrap It is good also as a structure which provided the inlet tube part 56 in the longitudinal direction edge part side of the tube part 54 for an object.

  Moreover, although the example provided with the single inflator 50 was shown in above-described embodiment, this invention is not limited to this, For example, a pair of right and left inflator 50 is connected to the both ends vicinity of the tube part 54 for lap | wraps. A plurality of inflators may be connected to the gas distribution manifolds 52, 72, 82.

  Furthermore, in the above-described embodiment, an example is shown in which gas is supplied from the inlet tube portion 56 to the shoulder tube portion 58 and the trident tube portion 74 via the wrap tube portion 54, but the present invention is limited to this. For example, the left and right shoulder tube portions 58 and the trident tube portion 74 may be branched from the inlet tube portion 56. In the above-described embodiment, an example in which one of the wrap tube portion 54 and the shoulder tube portion 58 (shoulder tube portion 78) corresponds to the first tube portion in the present invention and the other corresponds to the second tube portion. However, the present invention is not limited to this. For example, one of the lap gas supply unit 55 and the shoulder gas supply unit 60 (the lap gas supply unit 84) corresponds to the first pipe unit in the present invention. The other may correspond to the second pipe portion.

1 is a rear view of a vehicle seat to which a vehicle occupant restraint device according to a first embodiment of the present invention is applied. 1 is a plan view of a vehicle seat to which a vehicle occupant restraint device according to a first embodiment of the present invention is applied. 1 is a side view of a vehicle seat to which a vehicle occupant restraint device according to a first embodiment of the present invention is applied. It is a perspective view which shows the gas distribution manifold which comprises the passenger | crew restraint apparatus for vehicles which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the assembly | attachment state to the vehicle seat of the passenger | crew restraint apparatus for vehicles which concerns on the 1st Embodiment of this invention. It is a figure which shows the seating state of the passenger | crew to the vehicle seat to which the vehicle passenger | crew restraint apparatus which concerns on the 1st Embodiment of this invention was applied, Comprising: (A) is a front view, (B) is a side view. is there. It is a figure which shows the mounting state of the webbing by the passenger | crew of the vehicle passenger | crew restraint apparatus which concerns on the 1st Embodiment of this invention, Comprising: (A) is a front view, (B) is a side view. It is a front view which shows the air belt operating state of the passenger | crew restraint apparatus for vehicles which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the control system etc. by ECU which comprises the passenger | crew restraint apparatus for vehicles which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the gas distribution manifold which comprises the passenger | crew restraint apparatus for vehicles which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the gas distribution manifold which comprises the passenger | crew restraint apparatus for vehicles which concerns on the 3rd Embodiment of this invention. It is a front view which shows the air belt operating state of the passenger | crew restraint apparatus for vehicles which concerns on the 3rd Embodiment of this invention. It is a top view of a vehicular seat to which a crew member restraint device for vehicles concerning a 4th embodiment of the present invention is applied.

Explanation of symbols

10 Vehicle occupant restraint device 12 Webbing (4-point seat belt device)
12A Shoulder webbing (upper body restraint)
12B Wrap webbing (waist restraint)
18 Seat cushion 44 Shoulder air belt (upper body expansion part)
46 Wrap air belt (waist inflatable part)
50 Inflator (Gas generator)
52 Gas distribution manifold (gas distribution structure)
54 Tube part for wrapping (first pipe part, second pipe part)
58 Shoulder tube section (second pipe section, first pipe section)
70, 80, 90 Vehicle occupant restraint system 72, 82 Gas distribution manifold (gas distribution structure)
76 Rising tube section (branch pipe section)
88 Wrap air belt (waist inflatable part)

Claims (5)

Webbing for restraining passengers;
A plurality of inflatable portions provided on the webbing and deployed so as to be inflated by receiving a gas supply and protect an occupant;
A first pipe section that communicates the generation of the gas generator and a part of the plurality of expansion sections, and the first pipe section has a different flow path cross-sectional area and the gas generation apparatus and the plurality of the plurality of expansion sections A gas distribution structure having a second pipe portion communicating with another part of the inflating portion of
An occupant restraint device for vehicles. The plurality of inflating portions include a waist inflating portion provided on the waist restraining portion for restraining a waist portion of an occupant in the webbing.
In the gas distribution structure, the first pipe part is communicated with one of the pair of left and right waist expansion parts, and the second pipe part is communicated with the other of the pair of left and right waist expansion parts. The vehicle occupant restraint device according to Item 1. The webbing has a pair of left and right upper body restraining portions for restraining the upper body of an occupant,
The plurality of inflating portions include a pair of left and right upper body inflating portions respectively provided on a pair of left and right upper body restraining portions of the webbing,
In the gas distribution structure, the first pipe part is communicated with one of the pair of left and right upper body inflating parts, and the second pipe part is communicated with the other of the pair of left and right upper body inflating parts. The vehicle occupant restraint device according to claim 1 or 2. The plurality of inflating portions are provided in a waist inflating portion provided in a waist restraining portion for restraining a waist portion of an occupant in the webbing and in a body restraining portion for restraining an upper body of an occupant in the webbing. An upper body inflating part,
In the gas distribution structure, the first pipe part is communicated with either the waist expansion or the upper body expansion part, and the second pipe part is communicated with the other of the waist expansion and the body expansion part. The vehicle occupant restraint device according to any one of claims 1 to 3. The webbing has a pair of left and right upper body restraining portions for restraining the upper body of an occupant,
The plurality of inflating portions are a pair of left and right waist inflating portions provided on a waist restraining portion for restraining a waist portion of an occupant in the webbing, and a pair of left and right upper portions provided on the pair of left and right upper body restraining portions of the webbing. The gas distribution structure is configured to supply the gas of the gas generator to each of the pair of left and right waist expansion parts and the pair of left and right body expansion parts. The vehicle occupant restraint device according to any one of claims 1 to 4.

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