JP2017065395A - Front passenger seat airbag apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a front passenger seat airbag apparatus configured to be able to protect a passenger not only during a front collision but also during a vehicle oblique collision or an offset collision, and capable of being smoothly inflated while detouring a protruding object protruding from an instrument panel.SOLUTION: An airbag 15 comprises a main body inflation part 17; and a protruding inflation part 35, a passenger protection part 40 on a rear surface side at a time of completing inflation comprises a front collision constraint surface 41; an oblique collision constraint surface 42; and a constraint recessed part 43 between the front collision constraint surface 41 and the oblique collision constraint surface 42. In the main body inflation part 17, a supporting inflation part 26 that can support a front side of the protruding inflation part 35 is formed such that a detour recessed part 27 capable of detouring a protruding object 3 protruding upward from an instrument panel 1 is provided in an area on the front side of the protruding inflation part 35. In the main body inflation part 17, a horizontal tether 57 is disposed generally along a horizontal direction to be able to restrict an inflation shape of a region near the detour recessed part 27.SELECTED DRAWING: Figure 19

Description

  The present invention is folded and stored in a storage part provided in an instrument panel arranged in front of a passenger seated in a passenger seat, and inflated with gas flowing inside to protrude toward the rear side of the vehicle. The present invention relates to an airbag device for a passenger seat that includes an airbag that is inflated to protect an occupant.

  Conventionally, as an airbag device for a passenger seat, there are projections such as a monitor of a car navigation system, a control panel, and a cup holder which are arranged so as to partially protrude rearward or upward on the rear surface side of the instrument panel. Even if it is disposed, there is a configuration that includes an airbag that is inflated so as to bypass the protrusion and can be inflated smoothly (see, for example, Patent Documents 1 and 2).

JP 2014-226955 A Japanese Patent Laid-Open No. 2015-16840

  In the conventional airbag device for a passenger seat, the airbag is configured to protect an occupant seated in the passenger seat only at the time of a frontal collision of the vehicle. In recent years, there is a demand for protecting an occupant not only at the time of a frontal collision of a vehicle but also at the time of an oblique collision or an offset collision of the vehicle. In addition, when the airbag is configured to be able to protect the occupant even when the vehicle collides obliquely or at the time of offset collision in addition to the frontal collision, the protruding object that protrudes from the instrument panel also in such an airbag It is desirable to have a configuration that smoothly bypasses and smoothly expands.

  The present invention solves the above-described problems, and even when the airbag is configured to protect an occupant during a diagonal collision or an offset collision of a vehicle in addition to a frontal collision, the airbag projects from the instrument panel. It is an object of the present invention to provide an airbag device for a passenger seat that can be smoothly inflated around a protrusion.

An airbag device for a passenger seat according to the present invention is folded and stored in a storage portion provided in an instrument panel disposed in front of an occupant seated in a passenger seat, and an inflation gas is caused to flow into the rear of the vehicle An airbag device for a passenger seat, comprising an airbag that is inflated so as to protrude toward the side and is configured to protect an occupant,
Airbag
A main body expansion part that expands and expands so as to protrude rearward from the storage part;
On the rear surface side of the main body inflating portion when the expansion is completed, a projecting inflating portion disposed so as to project rearward from a position on the center side in the vehicle width direction of the vehicle,
And a configuration comprising
The rear side when the inflation is completed is configured as an occupant protection part that can protect the occupant,
The passenger protection department
Front restraint restraint surface that is configured from a rear side portion of the main body inflatable portion at the time of completion of expansion, and can protect the head of an occupant moving forward during a frontal collision of the vehicle,
In the projecting and expanding portion, it is composed of a portion of a side wall portion that continues from the rear surface of the main body expanding portion and projects rearward, and is an oblique front that is the front in the center of the vehicle in the vehicle width direction at the time of the vehicle oblique collision or offset collision A sloping constraining surface capable of protecting the head of an occupant moving toward the front;
With
Between the restraint surface for front projection and the restraint surface for oblique projection, a constraining recess for allowing the head of the occupant to enter and restrain is configured so as to be recessed forward,
In the main body inflating part, a projecting inflating part is provided in a region on the front side of the projecting inflating part on the instrument panel side when the inflating is completed, so as to provide a bypass recess that can bypass a projecting object projecting upward from the instrument panel A support inflatable portion capable of supporting the front side of
The left and right tethers arranged substantially along the left-right direction in the main body inflatable portion so as to be able to regulate the expansion shape of the portion in the vicinity of the detour concave portion are arranged at both ends, the portion constituting the detour concave portion, and the vehicle in the main body inflatable portion. It is characterized by being arranged so as to be connected to a wall portion arranged on the outer side in the width direction.

  In the passenger seat airbag device of the present invention, the airbag occupant protection portion projects rearward from the front collision restraint surface and the position of the front collision restraint surface on the center side in the vehicle width direction of the vehicle. Between the constraining surface for oblique projection formed as described above, a constraining recess for allowing the head of the occupant to enter and constrain is formed to be recessed forward. Therefore, at the time of oblique collision or offset collision of the vehicle, the head of the occupant moving toward the oblique front, which is the center side in the vehicle width direction, is guided into the constraining recess while guiding the constraining surface for oblique collision. In this way, it can be restrained. At this time, at least a part of the head of the occupant enters the restraint recess while pushing the restraint recess to the left and right, and is formed of a wide inner surface facing the restraint recess in the left-right direction. The restraint surface allows the occupant's head to be received from the front side to the left and right sides. In addition, since the constraining recess can contact both the left and right sides of the head, it can contribute to restraining the rotation in the left-right direction and catching the head. The passenger's head at the time of the collision can be received smoothly. In the passenger seat airbag device of the present invention, it is possible to catch the head of the occupant by the front collision restraint surface at the time of a frontal collision of the vehicle.

  Further, in the passenger seat airbag device according to the present invention, the airbag bypasses the protruding object protruding upward from the instrument panel in the front side of the protruding inflated part on the instrument panel side in the main body inflating part. A support inflating portion capable of supporting the front side of the projecting inflating portion is formed so as to provide a possible bypass recess. Therefore, even if it is mounted on a vehicle having an instrument panel that protrudes the protrusion, the airbag can be inflated so that the protrusion is bypassed by the bypass recess. In addition, since the bypass recess is regulated by the left and right tethers disposed in the main body inflating portion, the inflating shape of the nearby portion is restricted, so that it is possible to accurately suppress interference with the protrusion during expansion. it can. Further, in the airbag device for a passenger seat according to the present invention, since the support inflating portion capable of supporting the front side of the projecting inflating portion is formed, a configuration in which a bypass recess is disposed in front of the projecting inflating portion. Even so, the front side of the protruding inflating portion when the occupant's head is allowed to enter the restraining recess can be accurately supported by the supporting inflating portion, and the occupant's head can be stabilized by the restraining recess. Can be accepted.

  Therefore, in the airbag device for a passenger seat according to the present invention, even if the airbag is configured to protect an occupant at the time of an oblique collision or an offset collision of a vehicle in addition to a frontal collision, the airbag projects from the instrument panel. It can be smoothly inflated around the object.

  In the airbag device for a passenger seat according to the present invention, a tether capable of suppressing the backward movement of the constraining recess during deployment and inflating is provided inside the airbag, It is preferable that the rear surface side of the concave portion is arranged so as to be connected.

  In the passenger airbag device having such a configuration, the restraint recess can be restrained from being moved during deployment by the tether disposed inside the airbag, and when the airbag is completely inflated, The tether can accurately maintain the concave state of the constraining recess, and can also prevent the restraint concavity from moving back and forth (swing back and forth) when the airbag is deployed and inflated. The constraining recess can be arranged at a predetermined position. Further, the tether is configured to connect the front end side to the rear surface side of the bypass recess. For this reason, in addition to the expansion shape of the side surface of the recess being restricted by the left and right tethers, the bypass recess is regulated by the tether, and the expansion shape of the rear surface side of the recess is restricted. It is possible to more stably regulate the expanded shape (indented state).

  Specifically, the left and right tethers can be configured from a horizontal belt-like body that is arranged so that the width direction is substantially along the front-rear direction when the inflation of the airbag is completed. Further, the left and right tethers may be composed of a vertical belt-like body that is arranged so that the width direction is substantially along the vertical direction when the airbag is completely inflated. You may comprise combining.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic longitudinal sectional view showing a state in which a passenger seat airbag device according to an embodiment of the present invention is mounted on a vehicle. 1 is a schematic plan view of a state in which a passenger seat airbag device of an embodiment is mounted on a vehicle. It is the perspective view of the state seen from the front left which shows the state which expanded the airbag used with the airbag apparatus for passenger seats of embodiment alone. FIG. 4 is a perspective view of a state in which the airbag of FIG. It is a left view which shows the state which expanded the airbag of FIG. 3 alone. It is a right view which shows the state which expanded the airbag of FIG. 3 alone. It is a schematic longitudinal cross-sectional view of the airbag of FIG. 3, and respond | corresponds to the VII-VII site | part of FIG. It is a schematic longitudinal cross-sectional view of the airbag of FIG. 3, and is sectional drawing in the site | part of a front-back tether. It is a schematic longitudinal cross-sectional view of the airbag of FIG. 3, and is sectional drawing in the site | part of a protrusion expansion part. FIG. 4 is a schematic cross-sectional view of the airbag of FIG. 3. It is sectional drawing which shows the XI-XI site | part of FIG. It is an end view which shows the XII-XII site | part of FIG. FIG. 4 is a partially enlarged perspective view showing a portion near a constraining recess in the airbag of FIG. 3. FIG. 4 is a schematic partial enlarged longitudinal sectional view along the front-rear direction showing the vicinity of the left and right tethers disposed in the main body inflating portion in the airbag of FIG. 3. It is a top view which shows the base fabric which comprises the airbag of embodiment. It is a top view which shows the remainder of the base fabric which comprises the airbag of embodiment. It is the schematic which shows the process of folding the airbag of embodiment. It is the schematic which shows the process of folding the airbag of embodiment, and shows the process after FIG. FIG. 3 is a schematic cross-sectional view showing a state where the airbag has been completely inflated in the passenger airbag device according to the embodiment. 1 is a schematic cross-sectional view showing a state in which an inflated airbag receives an obliquely moving occupant in an airbag device for a passenger seat according to an embodiment. FIG. 2 is a schematic front view showing a state in which the airbag is completely inflated in the passenger seat airbag device of the embodiment, and shows a state before the occupant is received and when the occupant is received.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, an airbag device M for a passenger seat according to the embodiment is disposed inside an upper surface 2 of an instrument panel (hereinafter abbreviated as “instrument panel”) 1 in front of a passenger seat PS in a vehicle V. It is a top mount type to be arranged. Moreover, in the instrument panel 1 of the vehicle V on which the airbag device M for the passenger seat according to the embodiment is mounted, as shown in FIGS. 1 and 2, the left side of the case 12 as the storage portion (the center in the vehicle width direction of the vehicle V). The monitor 3 of the car navigation system protrudes upward from the upper surface 2 in the vicinity of the rear end of the central side portion 1a that is on the side and in front of the portion between the driver seat DS and the passenger seat PS. Are disposed. That is, the monitor 3 is disposed in the instrument panel 1 of the embodiment so as to partially protrude from the central portion 1a. In the embodiment, the front-rear, up-down, left-right directions are the same as the front-rear, up-down, left-right directions of the vehicle V unless otherwise specified.

  As shown in FIG. 1, the passenger airbag apparatus M according to the embodiment stores and holds the folded airbag 15, the inflator 8 that supplies inflation gas to the airbag 15, and the airbag 15 and the inflator 8. And a retainer 9 for attaching the airbag 15 and the inflator 8 to the case 12, and an airbag cover 6 that covers the folded airbag 15.

  The airbag cover 6 is formed integrally with the instrument panel 1 made of synthetic resin, and when the airbag 15 is deployed and inflated, the front and rear door portions 6a and 6b are pushed by the airbag 15 and opened. It is configured. Further, a connecting wall portion 6 c connected to the case 12 is formed around the door portions 6 a and 6 b in the airbag cover 6.

  As shown in FIG. 1, the inflator 8 includes a substantially cylindrical main body portion 8 a having a plurality of gas discharge ports 8 b and a flange portion 8 c for attaching the inflator 8 to the case 12. . In the case of the embodiment, the inflator 8 is configured to operate during frontal collision, oblique collision, and offset collision of the vehicle V.

  The case 12 as a storage part is formed in a substantially rectangular parallelepiped shape made of a sheet metal having a rectangular opening on the upper end side, and as shown in FIG. 1, the bottom of the substantially rectangular plate shape to which the inflator 8 is inserted and attached from below. A wall portion 12a and a peripheral wall portion 12b extending upward from the outer peripheral edge of the bottom wall portion 12a and locking the connecting wall portion 6c of the airbag cover 6 are configured. In the case of the embodiment, the airbag 15 and the inflator 8 use the bolts 9a of the retainer 9 arranged in the airbag 15 as attachment means, the peripheral edge of the gas inlet 21 in the airbag 15, and the bottom wall portion of the case 12 12 a and the flange portion 8 c of the inflator 8 are penetrated and fixed to the bottom wall portion 12 a of the case 12 by fastening the nut 10. A bracket (not shown) connected to the body side of the vehicle V is disposed on the bottom wall portion 12a of the case 12.

  In the case of the embodiment, as shown in FIGS. 3 to 12, the airbag 15 is inflated by inflating an inflating gas therein, and the airbag body 16 is disposed in the bag body 16 and the bag body 16 is inflated. And tethers 50, 54, 55, 57, 67, 68, 70, and 72 that regulate the above.

  The bag body 16 is formed into a bag shape formed from a flexible sheet body. In the case of the embodiment, as shown in FIGS. A projecting and expanding part 35 disposed so as to project rearward from the rear surface side of the expanding part 17.

  As shown by a two-dot chain line in FIG. 1, the main body inflating portion 17 is configured to be disposed so as to close the space between the upper surface 2 of the instrument panel 1 and the windshield 4 above the instrument panel 1 when the inflation is completed. Specifically, as shown in FIGS. 3 and 4, the main body inflating portion 17 has a substantially triangular prism shape in which the axial direction is substantially along the left-right direction, and the right front end when the expansion is completed. The side portion is a mounting portion 20 that is attached to the case 12, and is arranged so as to largely project to the left side (center side in the vehicle width direction) that is the driver's seat DS side when the inflation is completed. Further, the main body inflating portion 17 has a rear side wall portion 29 disposed on the rear surface side that is the occupant MP side when the inflating is completed, and extends from the periphery of the rear side wall portion 29 to the front side and decreases the width dimension in the vertical direction toward the front end side. And a tapered peripheral wall portion 18 that converges in this manner.

  The peripheral wall portion 18 is a portion that is disposed so as to mainly block the space between the upper surface 2 of the instrument panel 1 and the windshield 4 above the instrument panel 1 when the airbag 15 is completely inflated. An upper wall portion 18a and a lower wall portion 18b arranged substantially along the left-right direction, and a left wall portion 18c and a right wall portion 18d arranged opposite to the left and right sides are provided. The right wall portion 18d is configured to be disposed substantially along the front-rear direction when the airbag 15 is completely inflated. The left wall portion 18c constitutes the left side surface side of the support inflating portion 26 provided with a detouring recess 27 described later, and is arranged substantially along the front-rear direction on the front end side as shown in FIGS. The front part 18ca, the rear part 18cc disposed substantially along the front-rear direction at a position on the rear end side to the left of the front part 18ca, and the front part 18ca and the rear part 18cc. The intermediate portion 18cb is disposed substantially along the left-right direction and substantially along the vertical direction.

  In the airbag 15 of the embodiment, a portion on the right front end side when the inflation is completed in the peripheral wall portion 18 is an attachment portion 20 for attaching the airbag 15 to the case 12 (see FIGS. 3, 4, and 10). The attachment portion 20 is a portion disposed in the case 12 when the airbag 15 is completely inflated. A gas inlet that opens in a substantially circular shape so that inflation gas can flow into the attachment portion 20 at the time of completion of expansion, and has a peripheral edge attached to the bottom wall portion 12 a of the case 12. 21 is provided. A plurality of (four in the case of the embodiment) mounting holes for inserting the bolt 9 a of the retainer 9 into the peripheral edge of the gas inlet 21 and attaching the peripheral edge of the gas inlet 21 to the bottom wall portion 12 a of the case 12. 22 is formed. Further, in the case of the embodiment, the airbag 15 has a case in which the center of the gas inlet 21 is the mounting center C (see FIG. 10), and the mounting center C coincides with the center in the left-right direction of the passenger seat PS. 12 and mounted on the vehicle V (see FIG. 19). In addition, a vent hole 24 is formed in the left wall portion 18c and the right wall portion 18d of the peripheral wall portion 18 for exhausting excess expansion gas that has flowed into the inside (see FIGS. 3 and 4). As shown in FIGS. 3 and 5, the vent hole 24 on the left wall portion 18 c side is disposed in the rear side portion 18 cc constituting the portion of the support expansion portion 26.

  Then, as shown in FIG. 10, the main body inflating portion 17 of the embodiment is located at the left of the region (supporting inflating portion 26) located on the left side of the center line CL along the front-rear direction passing through the attachment center C when the inflating is completed. The amount of protrusion to the side (center side in the vehicle width direction) is larger than the amount of protrusion to the right side (outside side in the vehicle width direction) of the region located on the right side of the center line CL, and the left side (driving) It is configured so as to protrude greatly toward the seat DS side). Further, in the embodiment, the main body inflating portion 17 is configured to dent the left front region at the completion of the expansion so as to bypass the above-described monitor 3 when the expansion is completed (see FIGS. 3 and 10). ). In other words, the main body inflating part 17 is disposed on the front side of the projecting inflating part 35 with the left side region projecting greatly toward the driver's seat DS when the inflating is completed, and can support the front side of the projecting inflating part 35. A bypass recess 27 that can bypass the monitor 3 as a projecting object that is arranged so that the support inflating portion 26 partially protrudes upward from the instrument panel 1 is disposed in the region on the front end side. It is configured to be installed. The main body inflating portion 17 is configured so that the left front region when the inflating is completed is recessed over the entire upper and lower regions. In other words, the detouring concave portion 27 has the main body inflating portion 17 as shown in FIGS. It is formed over the entire area above and below.

  Further, in the case of the embodiment, when the airbag 15 is completely inflated, the bypass recess 27 is an intermediate portion between the front side portion 18ca of the left wall portion 18c constituting the right side surface 27a and the left wall portion 18c constituting the rear side surface 27b. 18cb so as to be substantially orthogonal to each other, and a corner portion 27c (intersection portion 18cx between the front portion 18ca and the intermediate portion 18cb) is formed between the right side surface 27a and the rear side surface 27b. (See FIGS. 3 and 10). Further, in the embodiment, the main body inflating portion 17 has the left wall portion 18c of the peripheral wall portion 18 on the driver's seat DS side when the inflating is completed (specifically, the rear portion 18cc constituting the left side surface of the supporting inflating portion 26). Is configured to be close to the airbag 114 for the steering wheel that is inflated so as to cover the steering wheel 110 disposed in front of the driver seat DS. In the embodiment, in the left wall portion 18 c of the peripheral wall portion 18, the front side portion 18 ca constituting the right side surface 27 a of the bypass recess portion 27 is positioned at the left and right direction side when the airbag 15 is completely inflated. It is comprised so that it may correspond with the right wall part 35d of 35 substantially (refer FIG. 10).

  The rear side wall portion 29 is disposed so as to be substantially along the vertical direction on the rear surface side that is the occupant MP side when the airbag 15 is inflated. In the case of the embodiment, as shown in FIGS. 6 to 8, the rear side wall portion 29 is arranged slightly inclined with respect to the vertical direction so that the lower end side is directed rearward. Further, the rear side wall portion 29 is arranged so as to be substantially along the left-right direction in the cross section along the front-rear direction when the airbag 15 is completely inflated. Further, a projecting inflating portion 35 that inflates so as to project rearward when the airbag 15 is completely inflated is disposed in a region on the left side of the left and right center (center line CL) in the rear side wall portion 29 (see FIG. 10). Specifically, the protruding inflating portion 35 is formed in the upper left part of the rear side wall portion 29 when the inflation is completed, and the head of the occupant MP seated in the passenger seat PS when the airbag 15 is inflated. It will be arranged at a position that is diagonally forward left of MH. In the airbag 15 of the embodiment, the protruding inflating portion 35 is disposed at a position behind the monitor 3 when the inflation of the airbag 15 is completed. That is, in the airbag 15 of the embodiment, when the inflation is completed, the monitor 3 is bypassed by the bypass recess 27, and the support inflating portion 26 and the projecting inflating portion 35 are provided at the rear side of the monitor 3 in the front-rear direction side. It is the structure arrange | positioned so that it may overlap (refer FIG. 19).

  The projecting and expanding portion 35 communicates with the supporting and expanding portion 26 of the main body inflating portion 17 on the front end side when the expansion is completed, and the inflating gas passes from the main body inflating portion 17 to the inside through the communicating portion 36 on the front end side. (See FIGS. 10 and 12), the upper wall 35a and the lower wall 35b arranged substantially along the left and right sides on both upper and lower sides, and the left arranged along the substantially front and rear directions on both left and right sides. The wall part 35c, the right wall part 35d, and the rear wall part 35e arrange | positioned along a substantially up-down direction in the rear side are provided. In the case of the embodiment, the left wall portion 35 c is configured to be continuous with the left wall portion 18 c of the peripheral wall portion 18 in the main body expansion portion 17 (specifically, the rear portion 18 cc constituting the left side surface of the support expansion portion 26). (See FIGS. 10 and 12).

  The projecting inflating portion 35 is on the left side (the center side in the vehicle width direction) of the center line CL along the front-rear direction passing through the attachment center C in the cross section along the front-rear direction when the inflation of the airbag 15 is completed. In the embodiment, the width dimension on the left and right side when the expansion is completed is set to the rear side wall portion 29 when the expansion of the main body expansion portion 17 is completed. It is set to about 2/5 of the width dimension in the left and right direction side of a nearby part. Further, the protruding inflating portion 35 can accurately protect the head MH of the occupant MP that moves toward the left front in the case of an oblique collision or an offset collision of the vehicle V with respect to the vertical dimension when the inflation is completed. The dimensions are set. Specifically, the projecting inflating portion 35 is set such that the vertical dimension L2 is larger than the vertical dimension L1 (see FIG. 7) of the constraining recess 43 described later, 17 is set to about 3/5 of the width dimension in the vertical direction at the completion of expansion of the portion near the rear side wall portion 29 in FIG. Further, in the case of the embodiment, when the airbag 15 is completely inflated, the projecting and inflating portion 35 projects rearward from the steering wheel airbag 114 that has been inflated (see FIG. 2). (See the two-dot chain line).

  In the airbag 15 of the embodiment, the protruding inflatable portion 35 disposed on the rear surface side when the inflation is completed and the rear side wall portion 29 in the main body inflating portion 17 protect the occupant MP when the inflation of the airbag 15 is completed. A possible occupant protection unit 40 is configured. The occupant protection unit 40 moves forward and obliquely forward at the time of an oblique collision or an offset collision of the vehicle V, and the front collision restraint surface 41 that can protect the head MH of the occupant MP that moves forward at the front collision of the vehicle V. An oblique collision restraining surface 42 capable of protecting the head MH of the occupant MP, and between the front collision restraining surface 41 and the oblique collision restraining surface 42, A constraining recess 43 for allowing the head MH to enter and restrain is formed.

  In the case of the embodiment, the front collision restraint surface 41 is constituted by a region on the upper side of the rear side wall portion 29 that is a rear surface side portion of the main body inflating portion 17 when the inflation is completed, and the airbag 15 when the inflation is completed. In FIG. 2, the region is arranged on the right side of the projecting and expanding portion 35. That is, in the case of the embodiment, the front collision restraint surface 41 includes a region extending to the left side (driver's seat DS side) beyond the center line CL along the front-rear direction passing through the attachment center C, and moves forward during a front collision. The head MH of the occupant MP to be protected can be protected without hindrance. In the case of the embodiment, when the airbag 15 is completely inflated, the front-projection restraint surface 41 has a slight cross-section substantially along the front-rear direction, and the front-rear restraint surface 41 is slightly in the vicinity of the left and right centers on the center line CL. It is comprised so that it may dent (refer FIG. 10).

  The oblique projecting restraint surface 42 includes a portion of a right wall portion 35 d that projects from the rear surface (rear side wall portion 29) of the main body inflating portion 17 and projects rearward in the projecting inflating portion 35. In the case of the embodiment, the constraining surface 42 for oblique projection is arranged so as to be substantially along the front-rear direction when the airbag 15 is completely inflated. Further, in the airbag 15 of the embodiment, the lower region of the rear side wall portion 29 is mainly formed when the occupant MP moving forward at the time of the front collision restrains the head MH by the occupant protection unit 40. I will take my chest.

  The constraining recess 43 formed between the front-projection restraint surface 41 and the oblique-projection restraint surface 42 is for allowing the head MH of the occupant MP to enter and restrain, and in the case of the embodiment, FIG. As shown in FIGS. 10, 11, and 13, a boundary region between the right region of the projecting and expanding portion 35 and the rear side wall portion 29 of the main body expanding portion 17 is formed so as to be substantially along the vertical direction. As shown in FIG. 4, the rear end 43b side is opened, and the pocket is recessed forward. In other words, the constraining recess 43 is configured such that the upper and lower sides are closed. Specifically, the constraining concave portion 43 is formed by a substantially rectangular left side wall 45 and a right side wall 46, which are wide in the vertical direction when viewed from the left and right sides, the upper edges 45a and 46a of each other, the lower edges 45b and 46b, The edges 45c and 46c are joined (sewn) to each other to form a pocket with the rear end 43b open (see FIG. 7). That is, the constraining recess 43 is configured with a constant width dimension from the front end 43a side (the tip end side of the recess). The constraining concave portion 43 has a vertical dimension (opening width dimension of the opening 44) L1 (see FIG. 7) that allows the head MH of the occupant MP to enter smoothly. Is set. Specifically, the length dimension (opening width dimension of the opening 44) L1 of the constraining concave portion 43 is the width dimension L2 on the vertical direction side of the front end side (original side) of the projecting and expanding portion 35. It is set smaller than (see FIG. 7) and is set to about 400 mm. Further, the width dimension (depth) W1 (see FIG. 7) of the constraining recess 43 in the front-rear direction is set to a dimension that allows entry into the area on the front side of the head MH of the occupant MP. , About 50 to 100 mm. The constraining concave portion 43 is arranged so that the upper and lower centers thereof substantially coincide with the projecting and expanding portion 35. In other words, the projecting and expanding portion 35 is disposed on the upper edge 43c side and the lower edge of the constraining concave portion 43. It is set as the structure which has the edge area | regions 35f and 35g which do not protrude on the 43d side, respectively, which protrudes up and down outward (refer FIGS. 11-13). The edge regions 35 f and 35 g in the projecting and expanding portion 35 are configured to be connected to the rear side wall portion 29 of the main body expanding portion 17 on the upper side and the lower side of the constraining concave portion 43. That is, the edge regions 35f and 35g are formed on the upper edge 43c side and the lower edge 43d side of the constraining recess 43, respectively, and the protruding expansion portion 35, the rear side wall portion 29, and the front-projection constraining surface 41 and Connecting portions 47U and 47D that connect the slanted protrusion restraining surface 42) are configured (see FIGS. 11 to 13).

  Further, in the airbag 15 of the embodiment, a restriction tether 68 that can suppress the backward movement of the constraining concave portion 43 during deployment is disposed. The restriction tether 68 is disposed so as to connect the leading end side (front end 43a side) of the concavity concave portion 43 and the intermediate portion 18cb of the left wall portion 18c constituting the rear side surface 27b of the bypass concave portion 27. This is a configuration. Specifically, the restriction tether 68 is coupled to the front end side (front end 43a side) of the recess of the constraining concave portion 43 and the intermediate portion 18cb (in the case of the embodiment, the front side portion 18ca) of the left wall portion 18c. The right and left tethers 57 are connected to the right end of the intermediate portion 18cb near the left end 59a of the horizontal band 58. In the airbag 15 of the embodiment, the constraining concave portion 43 is arranged substantially along the moving direction D (see FIG. 20) of the head MH of the occupant MP moving obliquely forward by the restriction tether 68. (See FIGS. 10 and 19). Specifically, in the embodiment, the constraining recess 43 has a front-rear direction (an inclination angle θ (see FIG. 10) with respect to the center line CL along the front-rear direction passing through the attachment center C) of about 20 degrees (15-25 degrees). Degree) is inclined and arranged in the front-rear direction so as to substantially follow the moving direction D of the head MH of the occupant MP moving obliquely forward. As shown in FIGS. 7 and 13, the upper and lower central portions on the front end side (front end 43 a side) of the dent are connected to the restriction tether 68, and when the airbag 15 is completely inflated, The left side wall 45 and the right side wall 46 are pulled and connected to the right wall portion 35d of the projecting and expanding portion 35 in a state in which the opening of the opening 44 on the rear end 43b side is suppressed. It is arranged so as to be recessed forward.

  In the case of the embodiment, tethers 50, 54, 55, 57, 67, 68, 70, and 72 are arranged in the bag body 16 as shown in FIGS. Specifically, in the bag body 16, front and rear tethers 50 disposed in the region of the main body inflating portion 17, two upper and lower tethers 54 and 55 disposed in the region of the main body inflating portion 17, and main body inflating Left and right tethers 57 disposed in the region of the portion 17, a restriction tether 67 disposed in the vicinity of the communication portion 36 on the front end side of the projecting and expanding portion 35, and a constraining recess 43 disposed in the region of the main body expanding portion 17. A restriction tether 68 that pulls the left and right, and two left and right tethers 70 and 72 arranged in the region of the projecting and expanding portion 35 are arranged.

  In the case of the embodiment, the front / rear tether 50 is located on a center line CL along the front / rear direction passing through the center (attachment center C) of the gas inlet 21 when the inflation of the airbag 15 is completed, as shown in FIG. The front part 51 extending from the periphery of the gas inlet 21 and the rear part 52 extending from the rear side wall 29 are connected to each other (FIGS. 8 and 10). reference).

  The front portion 51 is arranged so as to extend from the gas inlet 21, and in the case of the embodiment, the front portion 51 is formed by folding the front portion material 53 shown in FIG. The external shape at the time of completion of expansion is a three-dimensional shape that approximates a substantially triangular pyramid shape with the front end side extending substantially in the left-right direction and the rear end side extending substantially in the vertical direction. In the case of the embodiment, as shown in FIG. 10, the front part 51 has a front end region as a connecting part 51 a to the bag body 16, and an opening corresponding to the gas inlet 21 and the mounting hole 22 in the connecting part 51 a. (Symbol omitted) is arranged and is sewn to the lower surface side portion of the attachment portion 20 in the main body inflating portion 17 at the peripheral portion of the gas inlet 21 over the entire periphery. In the front portion 51, a region extending rearward from the gas inlet 21 constitutes a main body 51b, and the outer shape of the main body 51b is a three-dimensional shape that approximates a substantially triangular pyramid shape (FIGS. 8 and 10). reference). The main body 51b substantially matches the vertical width dimension of the rear end portion 51c side portion sewn to the front end 52a side of the rear portion 52 with the upper and lower width dimensions of the rear end portion 52a side portion. It is configured to let you.

  In the case of the embodiment, the rear portion 52 extends in the form of a sheet from the inner peripheral edges (the right edge 81d and the left edge 85c) of the rear left panel 81 and the rear right panel 85 constituting the rear side wall portion 29 in the main body inflating portion 17. The rear left panel 81 and the rear right panel 85 are integrally formed with extending portions 81e and 85e (see FIGS. 8, 10, and 16). In other words, the rear portion 52 is formed integrally with the rear left panel 81 and the rear right panel 85 in a two-layered manner. Specifically, in the case of the embodiment, the rear portion 52 is configured as a substantially trapezoidal shape that is widened up and down toward the rear end 52b side, with the front end 52a connected to the front portion 51 being narrow. ing.

  The front / rear tether 50 regulates the separation distance from the peripheral part of the gas inlet 21 at the substantially central left and right sides of the rear side wall portion 29 when the airbag 15 is completely inflated. It arrange | positions in order to suppress that the part 29 protrudes largely on the back which becomes the passenger | crew MP side. In the embodiment, the rear side wall portion 29 is pulled by the front / rear tether 50 so that when the airbag 15 is completely inflated, a position on the center line CL along the front / rear direction passing through the attachment center C is set. Then, it is arranged so as to be slightly recessed toward the front side of the vehicle over substantially the entire upper and lower regions (see FIG. 10). Further, the front / rear tether 50 of the embodiment is configured so that the front side portion 51 is passed through a gap between a horizontal strip 58 and a vertical strip 62 described later in the left / right tether 57.

  In the case of the embodiment, the two upper and lower tethers 54 and 55 arranged in the main body inflating portion 17 are juxtaposed on the left and right sides so that the positions on the front and rear sides are matched as shown in FIG. Yes. In the case of the embodiment, in detail, the upper and lower tethers 54, 55 are located on the rear side of the attachment portion 20 in the main body expanding portion 17 and are adjacent to the front side of the left and right tethers 57. Further, the upper and lower tethers 54 and 55 are disposed on both the left and right sides of the front and rear tether 50 so that the front and rear tether 50 is sandwiched therebetween. Each of the upper and lower tethers 54 and 55 has a strip shape arranged substantially along the vertical direction so as to connect the upper wall portion 18a and the lower wall portion 18b (see FIGS. 4 and 8). Each of the upper and lower tethers 54, 55 is configured by joining two tether base fabrics 54a, 54b, 55a, 55b arranged side by side in the vertical direction. In the case of the embodiment, these upper and lower tethers 54 and 55 are arranged so that the width direction is substantially along the left-right direction, and are configured with the same width dimension on the left-right direction side. These upper and lower tethers 54, 55 regulate the separation distance between the upper wall portion 18 a and the lower wall portion 18 b in the main body inflating portion 17 when the inflation of the airbag 15 is completed, thereby regulating the inflated shape of the main body inflating portion 17. Is arranged to do.

  The left and right tethers 57 disposed in the main body inflating portion 17 are formed in order to restrict the inflating shape in the vicinity of the detour recess 27, and the left wall portion constituting the right side surface 27 a of the detour recess 27. It arrange | positions substantially along the left-right direction so that the front side part 18ca of 18c and the right wall part 18d may be connected (refer FIG.3, 4). In the case of the embodiment, the left and right tethers 57 are arranged so that the width direction substantially follows the front-rear direction when the airbag 15 is completely inflated, and the width direction is set to be vertical when the airbag 15 is completely inflated. And a vertical strip 62 arranged so as to be substantially along. Specifically, the horizontal belt 58 is disposed so that the width direction is substantially along the front-rear direction at a position that is substantially the center of the main body inflating portion 17. On the lower side (region between the horizontal belt-like body 58 and the lower wall portion 18b), the width direction is arranged so as to be substantially along the vertical direction. Specifically, in the case of the embodiment, as shown in FIGS. 7 and 14, the vertical belt-like body 62 includes an upper edge 63 c of a main body portion 63 described later, and a rear edge 59 c of a main body portion 59 described later in the horizontal belt-like body 58. The left and right tethers 57 of the embodiment are located in the vicinity and slightly forward of the rear edge 59c, and the left and right tethers 57 of the embodiment have the horizontal band 58 and the vertical band 62 as viewed from the left and right sides. It is configured to be arranged in a substantially inverted L shape so as to be substantially orthogonal. Further, in the case of the embodiment, each of the horizontal belt-like body 58 and the vertical belt-like body 62 is configured by joining two belt-like base fabrics 61L, 61R, 65L, 65R arranged in parallel in the left-right direction. Has been.

  Specifically, the horizontal band-shaped body 58 includes a substantially band-shaped main body portion 59 arranged substantially along the width direction in the front-rear direction, and the left end 59a and right end 59b side of the main body portion 59 on the front side portion 18ca of the left wall portion 18c. , And mounting portions 60L and 60R attached to the right wall portion 18d. Specifically, the attachment portion 60L on the left end 59a side is sewn together across the entire front and back by the stitching portion 100 when the left front edge 75c and 76c of the upper panel 75 and the lower panel 76, which will be described later, are sewn together. This is a configuration that is coupled to the front portion 18ca of the left wall portion 18c (see FIG. 10). The attachment portion 60R on the right end 59b side is formed so as to extend downward from the main body portion 59, and this attachment portion 60R is coupled to the right panel 80 by a stitched portion 101R formed over substantially the entire front and rear. By this, it is the structure couple | bonded with the right wall part 18d (refer FIG. 14). Similarly to the horizontal band 58, the vertical band 62 also has a substantially band-shaped main body 63 arranged with the width direction extending substantially along the vertical direction, and the left wall 63c on the left end 63a and right end 63b side of the main body 63. The front portion 18ca and the attachment portions 64L and 64R attached to the right wall portion 18d are provided. Specifically, the attachment portions 64L and 64R on the left end 63a side and the right end 63b side are formed so as to extend rearward from the main body portion 63 (see FIG. 14). 64R is joined to the main body portion 78 of the left panel 77 and the right panel 80 by stitching portions 102L and 102R formed over substantially the entire front and rear, respectively, so that the front side portion 18ca and the right wall portion 18d are joined. It is a configuration to be combined.

  In the case of the embodiment, the main body portion 59 of the horizontal belt-like body 58 and the main body portion 63 of the vertical belt-like body 62 constituting the left and right tethers 57 are configured to have substantially the same length dimension, and the length dimension L3. (Refer to FIG. 10, the sum of the lengths of the base fabrics 61L, 61R, 65L, 65R for the belt-like bodies in a flat state) flatten the upper panel 75 and the lower panel 76 constituting the main body inflating portion 17. It is set smaller than the width dimension L4 (see FIG. 15) on the left and right direction side of the front end portion in the unfolded state. Specifically, the length dimension L3 of the main body portion 59 of the horizontal belt-like body 58 and the main body portion 63 of the vertical belt-like body 62 suppresses interference with the monitor 3 when the airbag 15 is completely inflated. Thus, the dimensions are set so as to be able to form a bypass recess 27 that can bypass the monitor 3. When the airbag 15 is completely inflated, the left and right tethers 57 regulate the separation distance between the front side portion 18ca of the left wall portion 18c and the right wall portion 18d, and to the left of the front side portion 18ca of the left wall portion 18c. The restriction by the left and right tethers 57 causes the bypass recess 27 to be formed in the airbag 15 when the inflation is completed. In the case of the embodiment, the left and right tether 57 has a configuration including a horizontal belt 58 disposed along the front-rear direction and a vertical belt 62 disposed along the vertical direction. 57, it is possible to suppress leftward protrusion of a wide area in the front-rear and up-down directions of the front side portion 18ca of the left wall portion 18c, and to stably hold the indented state of the bypass recess 27. Specifically, in the embodiment, the attachment portion 60L on the left end 59a side of the horizontal belt-like body 58 is disposed so as to extend forward from the corner portion 27c of the detour recess 27, and the attachment portion on the left end 63a side of the vertical belt-like body 62. 64L is a configuration arranged to extend downward on the rear edge 59c side (near the corner 27c of the bypass recess 27) so as to extend substantially along the corner 27c of the bypass recess 27. (See FIG. 3). In other words, in the airbag 15 according to the embodiment, the attachment portion 60L on the left end 59a side of the horizontal belt-like body 58 and the attachment portion 64L on the left end 63a side of the vertical belt-like body 62 are provided behind the horizontal belt-like body 58. Since it is arranged in a substantially inverted L shape so as to intersect at the part on the edge 59c side, the vicinity of the intersection part is pulled in a planar shape, and the bypass recess 27 is located near the intersection part. In addition, the corner portion 27c is provided so as to be recessed.

  The restriction tether 67 arranged at the site of the communication part 36 of the projecting and expanding part 35 is arranged substantially along the vertical direction at a position which is substantially the center of the left and right of the communication part 36 (see FIGS. 9 to 12). Specifically, the restriction tether 67 is disposed so as to connect the vicinity of the front edge of the upper wall portion 35a and the lower wall portion 35b in the projecting and expanding portion 35. In this case, as shown in FIGS. 9 and 11, two tether base fabrics 67a and 67b arranged side by side in the vertical direction are combined. The regulation tether 67 regulates the separation distance between the upper wall portion 35a and the lower wall portion 35b in the vicinity of the boundary portion (near the communication portion 36) with the main body inflating portion 17 in the projecting inflating portion 35. It is arranged to regulate the expansion completion shape.

  In the case of the embodiment, the restriction tether 68 that is disposed in the region of the main body inflating portion 17 and pulls the constraining concave portion 43 is left from the constraining concave portion 43 in the region of the main body inflating portion 17 as shown in FIG. It arrange | positions so that it may extend diagonally ahead. This restriction tether 68 connects the front end side (front end 43a side) of the concavity recess 43 and the rear side surface 27b side of the bypass recess 27 in the main body expansion portion 17 (intermediate portion 18cb in the left wall portion 18c). Thus, when the inflation of the airbag 15 is completed, the airbag 15 is arranged substantially along the moving direction D of the head MH of the occupant MP moving obliquely forward so as to extend continuously from the restraining recess 43. Yes (see FIG. 10). In the case of the embodiment, the restriction tether 68 extends from a position that is in the vicinity of the right end of the intermediate portion 18 cb that is in the vicinity of the left end 59 a (the end on the center side in the vehicle width direction) of the horizontal belt 58 that forms the left and right tethers 57. So that it is formed. Specifically, in the embodiment, as described above, the restriction tether 68 and the constraining recess 43 are inclined with respect to the front-rear direction (the center line CL along the front-rear direction passing through the attachment center C) (see FIG. 10). ) Around 20 ° (about 15 to 25 °), and is inclined with respect to the front-rear direction. In the embodiment, the regulation tether 68 is composed of a strip-shaped tether base fabric 69 (see FIG. 15). Then, as shown in FIGS. 3, 4, 7, and 10, the restriction tether 68 twists the tether base fabric 69 at an intermediate portion so that the front end of the restraining recess 43 is completed when the airbag 15 is completely inflated. (Tip) The rear end 68b connected to the 43a side is substantially along the vertical direction, and the front end 68a connected to the intermediate portion 18cb of the left wall portion 18c is substantially along the left-right direction. Become. In the case of the embodiment, the front end 68a of the restriction tether 68 is located at the position (in detail, the left side) near the left end 59a of the horizontal band 58 in the left and right tether 57 when the airbag 15 is manufactured. When the left front edges 75c and 76c of 76 are sewn, they are sewn together and connected to the intermediate portion 18cb of the left wall portion 18c (see FIG. 10).

  The two left and right tethers 70 and 72 arranged in the projecting and expanding portion 35 are arranged side by side in the front-rear direction, and as shown in FIG. 10, the right wall portion 35d and the left wall in the projecting and expanding portion 35, respectively. It arrange | positions substantially along the left-right direction so that the part 35c may be connected. In the case of the embodiment, as shown in FIG. 10, the left and right tethers 70 arranged on the front side have the right end 70 b on the front end side of the right wall portion 35 d of the protruding inflating portion 35 and in the vicinity of the opening 44 of the constraining recess 43. And the left end 70a side is connected to a position slightly ahead of the front and rear center of the left wall portion 35c of the projecting inflatable portion 35, and when the airbag 15 is completely inflated, the left end 70a side is Inclined with respect to the left-right direction so as to be directed rearward (see FIG. 10). The front left and right tethers 70 are arranged close to the rear side of the regulation tether 67. The right and left tethers 72 arranged on the rear side are positioned at the right end 72b side of the right wall portion 35d of the projecting and expanding portion 35 and at the rear side of the right end 70b of the left and right tether 70, and are substantially centered in the front and rear of the right wall portion 35d. And the left end 72a side, together with the left end 70a of the left and right tether 70, is connected to the vicinity of the boundary portion between the support inflating portion 26 and the projecting inflating portion 35, and when the airbag 15 is completely inflated, the right end 72b It arrange | positions slightly inclined with respect to the left-right direction so that the side may be located back (refer FIG. 10). In the case of the embodiment, each of the left and right tethers 70 and 72 is configured by joining two tether base fabrics 71L, 71R, 73L, and 73R arranged side by side in the left and right direction. These left and right tethers 70 and 72 are arranged so that the width direction is substantially along the vertical direction, and the right ends 70b and 72b are respectively shifted to the front and rear, respectively, on the right wall portion 35d of the projecting and expanding portion 35. Since the airbag 15 is connected, when the inflation of the airbag 15 is completed, the area of the front half of the right wall portion 35d can be regulated in a wide range in the front and rear and up and down directions (see FIG. 13). When completed, the right wall portion 35d constituting the oblique projection restraint surface 42 can be disposed so as to be substantially along the front-rear direction.

  The bag body 16 is configured in a bag shape by joining the peripheral edges of a base fabric having a predetermined shape. In the case of the embodiment, as shown in FIGS. 75, lower panel 76 disposed on the lower side when the expansion is completed, left panel 77 disposed on the left side when the expansion is completed, right panel 80 disposed on the right side when the expansion is completed, rear left disposed on the rear side when the expansion is completed The panel 81, the rear right panel 85, the main part panel 86 for the projecting part constituting the part from the upper side to the lower side of the projecting and expanding part 35, and the right panel for the projecting part constituting the right part of the projecting and expanding part 35 91, eight base cloths, two reinforcing cloths 95 and 96 for reinforcing the portion of the mounting portion 20 in the bag body 16, one reinforcing cloth 97 for reinforcing the peripheral edge of the gas inlet 21, and gas Protect the peripheral part of the inlet 21 And one protective cloth 98, the reinforcing patch 99 which reinforces the vicinity of a boundary portion between the projecting inflatable portion 35 and the main expansion portion 17, is configured.

  The upper panel 75 constitutes a portion of the upper wall portion 18a in the main body inflating portion 17 when the expansion is completed, and an upper region from the front portion 18ca to the intermediate portion 18cb in the left wall portion 18c. The lower panel 76 constitutes a portion of the upper wall portion 18a in the main body inflating portion 17 when the expansion is completed, and a lower region from the front portion 18ca to the intermediate portion 18cb in the left wall portion 18c. That is, in the airbag 15 according to the embodiment, the front side portion 18ca of the left wall portion 18c constituting the right side surface 27a of the bypass recess 27 and the intermediate portion 18cb constituting the rear side surface 27b are the upper panel 75 and the lower panel 76. It is comprised from the area | region of the left front side. Further, in the airbag 15 according to the embodiment, the left front edges 75c and 76c of the upper panel 75 and the lower panel 76 are sewn to the right side surface 27a and the rear side surface 27b of the bypass recess 27 using a suture thread. The sutured portion 100 is arranged so as to be substantially along the front-rear direction at a position that is substantially the center of the upper and lower sides (see FIGS. 3 and 5). In the airbag 15 according to the embodiment, the front end 68a of the restriction tether 68 and the left and right tethers 57 are formed when the stitched portion 100 is formed (when the left front edges 75c and 76c of the upper panel 75 and the lower panel 76 are stitched). The left end 59a of the horizontal belt-like body 58 is configured to be stitched together.

  The left panel 77 constitutes a portion from the rear side portion 18cc (the left side surface of the support expansion portion 26) of the left wall portion 18c in the main body expansion portion 17 when the expansion is completed to the left wall portion 35c of the protruding expansion portion 35. As shown in FIG. 15, a substantially rectangular projecting portion 79 constituting the left wall portion 35 c of the projecting and expanding portion 35 is formed on the rear upper end side of the flat triangular body portion 78 constituting the rear portion 18 cc. Are connected to each other. The right panel 80 constitutes a portion of the right wall portion 18d in the main body inflating portion 17 when the inflating is completed, and has an outer shape of a substantially triangular shape.

  The rear left panel 81 and the rear right panel 85 are configured to divide the portion of the rear side wall portion 29 in the main body inflating portion 17 at the completion of the expansion into left and right. In the embodiment, the rear left panel 81 is In the rear side wall portion 29, a left side region is formed from the center line CL along the front-rear direction passing through the attachment center C, and the rear right panel 85 forms a right side region from the center line CL in the rear side wall portion 29. ing. The rear left panel 81 is shaped such that the upper left region is cut out so as to allow the projecting and expanding portion 35 to communicate with each other, and the left side wall 45 of the constraining concave portion 43 is formed in the region of the cutout concave portion 82. A concave portion 83 is provided (see FIG. 16). The concave portion 83 has a substantially rectangular shape with the longitudinal direction extending in the vertical direction, and in the rear left panel 81 in a flat developed state, the left side from the right edge 82b of the cutout concave portion 82 is leftward. It is formed so as to protrude. Specifically, the concave portion 83 is set such that the width dimension on the vertical direction side is set slightly smaller than the width dimension on the vertical direction side of the notch recess 82 (the length dimension of the right edge 82b), The lower edge 83b is configured to be close to the lower edge 82a of the notch recess 82 so as to be positioned below the upper and lower centers of the notch recess 82. Further, on the inner peripheral edges (right edge 81d, left edge 85c) side of the rear left panel 81 and the rear right panel 85, extending portions 81e and 85e constituting the rear portion 52 of the front and rear tether 50 are formed, respectively. ing.

  The protrusion main panel 86 includes an upper wall portion 87 constituting a portion of the upper wall portion 35a, a rear wall portion 88 constituting a portion of the rear wall portion 35e, A lower wall portion 89 that constitutes a portion of the lower wall portion 35b. The upper wall portion 87, the rear wall portion 88, and the lower wall portion 89 are configured in a substantially band shape in series. Has been.

  The protruding portion right panel 91 constitutes a portion of the right wall portion 35d of the protruding inflating portion 35 at the time of completion of expansion, and has an outer shape of a substantially trapezoidal shape slightly narrowed toward the rear edge 91c. ing. Further, the protruding portion right panel 91 has a concave portion 92 constituting the right side wall 46 of the constraining concave portion 43 disposed on the front edge 91d side. The concave portion 92 is formed so as to protrude from the front edge 91d of the protruding portion right panel 91 with the outer shape being substantially rectangular, and the concave portion 83 formed in the rear left panel 81; The outer shape is substantially the same (see FIG. 16). Specifically, the concave portion 92 is set such that the width dimension on the vertical direction side is set slightly smaller than the width dimension on the vertical direction side of the front edge 91d of the right panel 91 for protrusion, and the center in the vertical direction is used for the protrusion. It is configured to substantially coincide with the upper and lower centers of the right panel 91. That is, the front edge 91d of the protruding portion right panel 91 includes an upper portion 91da and a lower portion 91db that extend to the upper side and the lower side of the concave portion 92, respectively. In the embodiment, the upper part 91da is coupled to the right edge 82b of the notch recess 82 in the rear left panel 81, and the lower part 91db is the periphery of the corner of the notch recess 82 in the rear left panel 81. The corner peripheral edge 84 is coupled. As shown in FIGS. 7 and 16, the corner peripheral edge portion 84 is reinforced by a separate rectangular reinforcing patch 99. The reinforcing patch 99 is provided in the vicinity of the boundary portion between the main body inflating portion 17 (supporting inflating portion 26) and the projecting inflating portion 35, specifically, in the vicinity of the corner portion on the lower right front end side of the projecting inflating portion 35. In order to reinforce the vicinity of the part joined to the part 26). In the airbag 15 according to the embodiment, the upper portion 91da and the lower portion 91db of the right panel 91 for the projecting portion are joined in the vicinity of the joining portion (the edge region 35f in the projecting inflating portion 35, 35g) form connecting portions 47U and 47D for connecting the front-projection restraint surface 41 and the oblique-projection restraint surface 42 on the upper edge 43c side and the lower edge 43d side of the restraint recess 43. (See FIGS. 11 to 13). Specifically, the lower connecting portion 47D is formed so as to enter the region to which the reinforcing patch 99 is applied (the stitched portion 84a where the corner peripheral edge portion 84 and the reinforcing patch 99 are sewn). Has been.

  Reinforcing cloths 95 and 96 that reinforce the attachment portion 20 of the bag body 16 are arranged one by one so that the outer shape is a substantially trapezoidal shape corresponding to the area on the front edge side of each upper panel 75 and lower panel 76. (See FIG. 15). The reinforcing cloth 97 that reinforces the peripheral portion of the gas inlet 21 has a substantially circular outer shape. The protective cloth 98 has a substantially rectangular outer shape, and is sewn at the periphery of the gas inlet 21 (specifically, the front edges 75a and 76a of the upper panel 75 and the lower panel 76 are sewn together). Covering the inner peripheral surface side of the part (not shown), the stitched part can be protected from the inflation gas.

  In the embodiment, an upper panel 75, a lower panel 76, a left panel 77, a right panel 80, a rear left panel 81, a rear right panel 85, a protruding main panel 86, a protruding right panel 91, which constitute the bag body 16. Reinforcing cloth 95, 96, 97, protective cloth 98, reinforcing patch 99, front side material 53 constituting the front side part 51 of the front and rear tether 50, tether base fabrics 54a, 54b, 55a constituting the upper and lower tethers 54, 55, 55b, the belt-like fabrics 61L, 61R, 65L, 65R constituting the horizontal belt 58 and the vertical belt-like body 62 of the left and right tethers 57, the tether fabrics 67a, 67b constituting the regulating tether 67, and the regulating tether 68 are constructed. The tether base fabric 69 and the tether base fabrics 71L, 71R, 73L, 73R constituting the left and right tethers 70, 72 are respectively polyester yarn and polyamide. It is formed from a flexible having a woven fabric made of such.

  The bag body 16 of the embodiment includes an upper panel 75, a lower panel 76, a left panel 77, a right panel 80, a rear left panel 81, a rear right panel 85, and a protruding main panel, as shown in FIGS. 86, the corresponding edge portions of the right panel 91 for the projecting portion are sewn (coupled) with a suture to form a bag shape. Specifically, the front edge 75a, left front edge 75c, and right front edge 75e of the upper panel 75 are coupled to the front edge 76a, left front edge 76c, and right front edge 76e of the lower panel 76. The rear edge 75b of the upper panel 75 is engaged with the front edge 87a of the upper wall portion 87 in the main panel 86 for the projecting portion and the upper edges 81a and 85a of the rear left panel 81 and the rear right panel 85. The left rear edge 75 d of the upper panel 75 is coupled to the upper edge 78 a of the main body 78 in the left panel 77. The right rear edge 75f of the upper panel 75 is coupled to the upper edge 80a of the right panel 80. The rear edge 76b of the lower panel 76 is coupled to the lower edges 81b and 85b of the rear left panel 81 and the rear right panel 85. A left rear edge 76 d of the lower panel 76 is coupled to a lower edge 78 b of the main body 78 in the left panel 77. The right rear edge 76f of the lower panel 76 is coupled to the lower edge 80b of the right panel 80. The rear edge 78 c of the main body 78 in the left panel 77 is coupled to the left edge 81 c of the rear left panel 81. The upper edge 79a of the protrusion 79 in the left panel 77 is coupled to the left edge 87b of the upper wall portion 87 in the protrusion main panel 86, and the rear edge 79c is coupled to the left edge 88a of the rear wall portion 88. The lower edge 79b is coupled to the left edge 89b of the lower wall portion 89. The rear edge 80c of the right panel 80 is coupled to the right edge 85d of the rear right panel 85. A right edge (inner peripheral edge) 81 d of the rear left panel 81 is coupled to a left edge (inner peripheral edge) 85 c of the rear right panel 85. The lower edge 82a of the notch recess 82 in the rear left panel 81 is coupled to the front edge 89a of the lower wall portion 89 of the main panel 86 for the protruding portion. The right edge 82 b of the notch recess 82 in the rear left panel 81 is coupled to the upper portion 81 da of the front edge 91 d of the protruding portion right panel 91. The upper edge 83a, the lower edge 83b, and the front edge 83c of the recess portion 83 in the rear left panel 81 are respectively an upper edge 92a, a lower edge 92b, and a front edge 92c of the recess portion 92 in the protrusion right panel 91. Combined. The right edge 87c of the upper wall portion 87, the right edge 88b of the rear wall portion 88, and the right edge 89c of the lower wall portion 89 of the main panel 86 for the projecting portion are respectively the upper edge 91a of the right panel 91 for the projecting portion. , The rear edge 91c and the lower edge 91b. As described above, the lower portion 91db of the front edge 91d of the protruding portion right panel 91 is coupled to the corner peripheral portion 84 that is the peripheral portion of the corner of the notch recess 82 in the rear left panel 81.

  A steering wheel airbag device 113 is mounted on the steering wheel 110 disposed in front of the driver seat DS on the left side of the passenger seat PS. The steering wheel airbag device 113 includes a steering wheel airbag (hereinafter abbreviated as “airbag”) 114 that is folded and housed in a central boss portion 111 of the steering wheel 110, and an inflation gas in the airbag 114. And an inflator not shown. The airbag 114 is formed as a bag formed from a flexible sheet body, and when an inflator (not shown) is operated, an inflation gas from the inflator is caused to flow into the interior, so that the upper surface (rear surface) of the steering wheel 110 is It is the structure which expand | swells so that it may cover the whole surface (refer the dashed-two dotted line of FIG. 2, and FIG. 21). The inflator (not shown) of the steering wheel airbag device 113 is also subjected to the front collision, the oblique collision, and the offset collision of the vehicle V, like the inflator 8 of the passenger seat airbag apparatus M. Is configured to operate.

  Next, mounting of the passenger seat airbag apparatus M of the embodiment on the vehicle V will be described. First, the airbag 15 is folded so as to be housed in the case 12 from the state in which the retainer 9 is housed so that the bolt 9 a protrudes from the mounting hole 22 inside the air bag 15. Specifically, first, while the rear side wall 29 of the main body inflating part 17 is developed almost flat, the rear side wall 29 is made to approach the gas inlet 21 side, and a crease is formed at the peripheral wall 18. And the bag is folded so as to overlap the rear side wall portion 29 of the protruding inflating portion 35 to form a pre-folding bag 103 (see FIG. 17A). Thereafter, the pre-folding bag 103 is folded by left-right reduced folding that can reduce the width dimension in the left-right direction so as to be housed in the case 12. Specifically, in the embodiment, in the pre-folding bag 103, the left side portion 104, which is the left side of the gas inlet 21, is directed so that the left edge 104a faces away from the gas inlet 21 (rear side wall 29 side). In addition, a fold substantially along the front-rear direction is attached and folded, and the folded back part is folded into two along the fold along the front-rear direction on the rear side wall portion 29 side, and the left-side part 104 is folded. At the same time, the right portion 105, which is the right side of the gas inlet 21, is creased substantially along the front-rear direction so that the right edge 105a faces the side away from the gas inlet 21 (rear side wall 29 side). When folded, a left and right reduced folded bag 106 can be formed as shown in FIG. Next, as shown in FIG. 17B and FIGS. 18A and 18B, the rear portion 107 on the rear side of the gas inlet 21 in the left and right reduced folded bag 106 is moved from the rear edge 107a side to the gas inlet 21 side. The roll folding part 108 formed by this roll folding is placed on the gas inlet 21, and as shown in FIGS. 18B and 18C, the front side that is the front side of the gas inlet 21 If the part 109 is folded back so as to be placed on the roll folding part 108, the airbag 15 can be folded in a state where the width dimensions of the front, rear, left and right are reduced so as to be housed in the case 12.

  The airbag 15 folded in this way is wrapped around a wrapping sheet (not shown) that can be broken so as not to collapse. Next, the folded airbag 15 is placed on the bottom wall portion 12 a of the case 12. The main body 8a of the inflator 8 is inserted into the case 12 from below the bottom wall 12a, and the bolts 9a protruding downward from the bottom wall 12a are inserted into the flange 8c of the inflator 8. Then, if the nut 10 is fastened to each bolt 9a protruding from the flange portion 8c of the inflator 8, the folded airbag 15 and the inflator 8 can be attached to the case 12.

  Then, the peripheral wall portion 12b of the case 12 is locked to the connecting wall portion 6c of the airbag cover 6 in the instrument panel 1 mounted on the vehicle V, and a bracket (not shown) of the case 12 is fixed to the body side of the vehicle V. Thus, the passenger seat airbag device M can be mounted on the vehicle V.

  In the passenger airbag apparatus M according to the embodiment, the inflation gas is discharged from the gas discharge port 8b of the inflator 8 when the vehicle V is mounted on the vehicle V at the time of a frontal collision, an oblique collision, or an offset collision. Then, the airbag 15 is inflated by inflating the inflation gas into the interior, and the door portions 6a and 6b of the airbag cover 6 are pushed open. The airbag 15 protrudes upward from the case 12 through an opening formed by pushing and opening the door portions 6a and 6b of the airbag cover 6, and expands and inflates while protruding toward the vehicle rear side. As shown in the two-dot chain line in FIGS. 1 and 2 and FIG. 19, the expansion is completed so as to close the space between the upper surface 2 of the instrument panel 1 and the windshield 4 above the instrument panel 1. At this time, the airbag 114 for the steering wheel also completes the inflation so that the inflation gas flows into the interior and covers the upper surface (rear surface) of the steering wheel 110 (see FIG. 21).

  In the passenger seat airbag apparatus M according to the embodiment, in the passenger protection unit 40 of the airbag 15, the front collision restraint surface 41 and the center side in the vehicle width direction of the vehicle V on the front collision restraint surface 41 (implementation). In the case of the form, a constraining recess for allowing the head MH of the occupant MP to enter and restrain between the slanting constraining surface 42 formed so as to protrude rearward from the position on the left side) 43 is formed to be recessed forward. Therefore, at the time of the oblique collision or offset collision of the vehicle V, the head MH of the occupant MP that moves toward the left front side that is the center side in the vehicle width direction is guided for restraint while guiding the restraint surface 42 for oblique collision. It can be restrained by entering into the recess 43. At this time, as shown in FIG. 20, at least a part of the head MH of the occupant MP enters the restraint recess 43 while pushing the restraint recess 43 left and right. The head MH of the occupant MP can be received from the front side to the left and right sides by the wide constraining surface constituted by the inner side surfaces (the left side wall 45 and the right side wall 46) facing each other in the direction side. In addition, since the constraining concave portion 43 can contact both the left and right sides of the head MH, the constraining concave portion 43 can prevent the rotation in the left-right direction and contribute to receiving the head MH. The head MH of the occupant MP at the time of a collision or an offset collision can be received smoothly. Further, in the passenger seat airbag apparatus M of the embodiment, the head MH of the occupant MP can be received by the front collision restraint surface 41 at the time of a frontal collision of the vehicle V.

  Further, in the passenger seat airbag apparatus M of the embodiment, the airbag 15 includes a projecting object that protrudes upward from the instrument panel 1 in the main body inflating portion 17 in a region on the front side of the projecting inflating portion 35 on the instrument panel 1 side. A support inflating portion 26 capable of supporting the front side of the projecting inflating portion 35 is formed so as to provide a detouring concave portion 27 that can circumvent the monitor 3 as described above. For this reason, even if the monitor 3 is mounted on the vehicle V having the instrument panel 1 from which the protruding object protrudes, the bypass 15 can be inflated by the bypass recess 27 so as to bypass the monitor 3. . Further, since the bypass recess 27 is regulated by the left and right tethers 57 disposed in the main body inflating portion 17 so as to restrict the expansion shape of the nearby portion, it is possible to accurately interfere with the monitor 3 during the expansion. Can be suppressed. Further, in the passenger seat airbag apparatus M of the embodiment, since the support inflating portion 26 that can support the front side of the projecting inflating portion 35 is formed, the bypass recess 27 is provided in front of the projecting inflating portion 35. Even if it is the structure which arrange | positions, the front side of the protrusion expansion | swelling part 35 at the time of making the passenger | crew's MP head MH approach in the recessed part 43 for restraint can be supported exactly by the support expansion | swelling part 26 (FIG. 20), the restraint concave portion 43 can stably receive the head MH of the occupant MP.

  Therefore, in the airbag apparatus M for the passenger seat according to the embodiment, even if the airbag 15 is configured to protect the occupant MP at the time of a diagonal collision or offset collision of the vehicle in addition to the frontal collision, the airbag 15 protrudes from the instrument panel 1. The projection 3 such as the monitor 3 can be bypassed and smoothly inflated.

  Further, in the passenger seat airbag apparatus M of the embodiment, a restriction tether 68 capable of suppressing the backward movement of the constraining recess 43 during deployment and inflation is disposed inside the airbag 15, and the restriction tether 68. Is arranged such that the tip (front end 43a) side of the recess of the constraining recess 43 and the rear side surface 27b side of the bypass recess 27 (intermediate portion 18cb in the left wall portion 18c) are connected. is there. Therefore, in the passenger seat airbag apparatus M of the embodiment, the restraint recess 43 can be restrained from being moved during deployment by the restriction tether 68 disposed inside the airbag 15, and the airbag When the inflation of the air bag 15 is completed, the restriction tether 68 can accurately maintain the recessed state of the restraining recess 43, and the restraint recess 43 is moved back and forth during the inflation and inflation of the airbag 15 (back and forth swinging). ) Can also be prevented, and the constraining recess 43 can be quickly placed at a predetermined position. Further, the restriction tether 68 is configured such that the front end (front end 68 a) side is connected to the intermediate portion 18 cb side of the left wall portion 18 c constituting the rear side surface 27 b of the bypass recess 27. Therefore, in addition to the expansion shape of the side surface (right side surface 27a) of the recess being restricted by the left and right tethers 57, the bypass recess portion 27 has the expansion shape of the rear surface (rear side surface 27b) side of the recess by this tether. Since it is regulated, it becomes possible to more stably regulate the expansion shape (depressed state) of the portion of the bypass recess 27.

  Specifically, in the passenger seat airbag apparatus M of the embodiment, the left and right tethers 57 are arranged so that the width direction is substantially along the front-rear direction when the airbag 15 is completely inflated; And a vertical belt-like body 62 arranged so that the width direction is substantially along the vertical direction when the bag 15 is completely inflated. The horizontal band 58 and the vertical band 62 have the left ends 59a and 63a connected to the front portion 18ca of the left wall 18c constituting the bypass recess 27, and the right ends 59b and 63b are connected to the right wall 18d. It is the structure connected to. Therefore, in the embodiment, as compared with the case where the left and right tethers are configured only from one of the horizontal band or the vertical band, the front side portion 18ca of the left wall portion 18c that constitutes the bypass recess 27 is formed by the left and right tethers 57, It can be pulled to the right wall 18d side in a wide area in the front / rear / up / down direction, and the front portion 18ca of the left wall portion 18c can be accurately suppressed from projecting to the left on the monitor 3 side. . Further, in the airbag 15 according to the embodiment, the regulation tether 68 is disposed so that the front end (front end 68a) side is connected to the intermediate portion 18cb of the left wall portion 18c constituting the rear side surface 27b of the bypass recess 27. The restriction tether 68 has a front end 68a side on the left side in the vicinity of the left end 59a of the horizontal band-like body 58, that is, in the vicinity of the right end of the intermediate portion 18cb, and the intersection portion 18cx (the corner of the bypass recess 27). Since it is connected in the vicinity of the left side of the portion 27c), it becomes possible to more stably maintain the recessed shape having the corner portion 27c of the detour recessed portion 27. That is, in the airbag 15 of the embodiment, as shown in FIG. 20, the bypass recess 27 is formed by the left and right tethers 57 extending in the left-right direction and the restriction tether 68 extending in the front-rear direction when the airbag 15 is completely inflated. Since the shape of the dent is regulated, the outer shape (the state of the dent) having the corner portion 27c by making the right side surface 27a and the rear side surface 27b substantially orthogonal can be further stabilized and interfere with the monitor 3. This can be suppressed more accurately.

  Further, in the embodiment, the left and right tethers 57 arrange the horizontal belt-like body 58 and the vertical belt-like body 62 one by one, and extend the vertical belt-like body 62 downward from the vicinity of the rear edge 59c of the horizontal belt-like body 58. The horizontal belt-like body 58 and the vertical belt-like body 62 are arranged in a substantially inverted L shape when viewed from the left-right direction (see FIGS. 5 and 6). However, the configuration of the left and right tethers is not limited to the embodiment. For example, the horizontal band and the vertical band each have a substantially T-shape or an inverted T-shape when viewed from the left-right direction. Further, two horizontal strips may be arranged along the vertical direction so as to be substantially parallel, or two vertical strips may be arranged along the front-rear direction so as to be substantially parallel. A configuration may be adopted. Furthermore, according to the external shape of a protrusion, you may use the thing of the structure which has arrange | positioned only one of a vertical strip or a horizontal strip as a right-and-left tether. However, from the viewpoint of stably pulling the right side surface 27a (the front side portion 18ca of the left wall portion 18c) of the bypass recess portion 27 toward the right wall portion 18d in a wide area, as in the embodiment, It is preferable that the belt-like body 62 is arranged in a substantially inverted L shape.

  Further, in the passenger seat airbag device M of the embodiment, the restraining recess 43 is moved by the restriction tether 68 in the moving direction D of the head MH of the occupant MP moving obliquely forward when the airbag 15 is completely inflated. Therefore, as shown in FIG. 20, the head MH of the occupant MP is restrained so as to be substantially along the direction of the depression of the restraining recess 43, as shown in FIG. It will enter into the recess 43 for use. For this reason, the head MH of the occupant MP is prevented from greatly interfering with either one of the left and right inner surfaces (the left side wall 45 and the right side wall 46) of the constraining recess 43. It becomes possible to receive the head MH of the occupant MP substantially evenly on the inner side surfaces (the left side wall 45 and the right side wall 46). As a result, the restraint recess 43 can suppress the rotation in the left-right direction and can smoothly receive the head MH of the occupant MP. In the embodiment, the restricting tether is arranged so as to be inclined with respect to the front-rear direction so as to substantially follow the movement direction of the occupant's head when the airbag is completely inflated. If the above points are not taken into account, even when the restriction tether is arranged in the airbag, the restriction tether causes the restraining concave portion to be arranged substantially along the front-rear direction when the airbag is completely inflated. It is good also as a structure.

  Further, in the passenger seat airbag apparatus M of the embodiment, the connecting portion that connects the front-projection restraint surface 41 and the oblique-projection restraint surface 42 to the upper edge 43c side and the lower edge 43d side of the restraint recess 43. 47 (47U, 47D) is provided. In other words, in the passenger airbag device M of the embodiment, the constraining recess 43 has a pocket shape in which the upper edge 43c side and the lower edge 43d side are closed and only the rear end 43b side is opened. Yes. Therefore, when the inflation of the airbag 15 is completed, the restraint recess 43 can be prevented from opening the rear end 43b, and the head MH moves forward when the head MH of the occupant MP is received. The head MH can be received in the constraining recess 43 while accurately absorbing energy. If this point is not taken into consideration, the constraining concave portion may be configured as a substantially groove shape along the vertical direction that opens the upper edge side and the lower edge side.

  Furthermore, in the passenger seat airbag apparatus M of the embodiment, the constraining recess 43 is connected to the restriction tether 68 at the front end (front end 43a) side of the recess so that it is recessed forward when the airbag 15 is completely inflated. The right wall portion 35d of the protruding inflating portion 35 that is formed and that constitutes the slanting constraining surface 42 is also restricted by the left and right tethers 70, 72 so that it substantially follows the front-rear direction when the airbag 15 is inflated. Will be placed. In particular, in the embodiment, the right end 70 b of the front left and right tether 70 is connected to the vicinity of the opening 44 of the constraining recess 43. In addition, in the airbag 15 of the embodiment, the left side wall 45 of the constraining concave portion 43 is composed of the protruding portion right panel 91 together with the right wall portion 35d of the protruding inflating portion 35. In other words, It is formed continuously from the wall 35d. Therefore, in the airbag 15 according to the embodiment, when the airbag 15 is completely inflated, the airbag 15 is connected to the right wall portion 35d (obliquely constraining surface 42) of the projecting inflating portion 35 so as to be substantially along the front-rear direction. The restraint recess 43 is disposed so as to extend, and the restraint recess 43 can be prevented from opening the opening 44 on the rear end 43b side as much as possible when the airbag 15 is completely inflated. As a result, in the airbag 15 of the embodiment, when the inflation is completed, the constraining recess 43 is easily maintained in a state where the left side wall 45 and the right side wall 46 are in contact with each other, and when the head MH of the occupant MP is received. The kinetic energy of the head MH of the occupant MP entering from the opening 44 can be absorbed accurately so as to push open the left side wall 45 and the right side wall 46, and the head MH of the occupant MP can be accurately received. Can do. In order to reliably suppress the opening of the restraining recess when the airbag is completely inflated, a seam is used on the periphery of the opening of the restraining recess using a suture that can be broken when the head of the passenger enters. It is good also as a structure which provides a part and obstruct | occludes opening by this seam part.

  In the airbag 15 according to the embodiment, the right side surface 27a of the bypass recess 27 (the front side portion 18ca in the left wall portion 18c of the peripheral wall portion 18) protrudes in the left-right direction when the airbag 15 is completely inflated. Although it is configured so as to substantially match the right wall portion 35d of the inflating portion 35, the shape of the recess of the bypass recess is not limited to the embodiment, and depends on a projection such as a monitor formed on the instrument panel. Of course, the right side surface may be arranged on the left side or the right side of the right wall portion of the projecting and expanding portion.

  DESCRIPTION OF SYMBOLS 1 ... Instrument panel (instrument panel), 3 ... Monitor (projection), 4 ... Wind shield, 6 ... Air bag cover, 8 ... Inflator, 12 ... Case (storage part), 15 ... Air bag, 16 ... Bag body, DESCRIPTION OF SYMBOLS 17 ... Main body expansion part, 18 ... Circumferential wall part, 18c ... Left wall part, 18ca ... Front side part, 18cb ... Intermediate part, 18cc ... Rear side part, 26 ... Supporting expansion part, 27 ... Detouring recessed part, 27a ... Right side surface, 27 ... Rear side surface, 29 ... Rear side wall portion, 35 ... Projection inflating portion, 40 ... Passenger protection portion, 41 ... Front impact restraint surface, 42 ... Oblique impact restraint surface, 43 ... Restraint recess, 57 ... Left / right tether, 58 ... Horizontal belt, 62 ... Vertical belt, 68 ... Regulatory tether (tether), MP ... Passenger, MH ... Head, PS ... Passenger seat, V ... Vehicle, M ... Airbag device for passenger seat.

Claims (5)

Folded and stored in a storage part provided in an instrument panel disposed in front of the passenger seated in the passenger seat, inflated so as to flow into the interior and protrude toward the rear of the vehicle, An airbag device for a passenger seat provided with an airbag configured to protect an occupant,
The airbag is
A main body inflating part that expands and inflates so as to protrude rearward from the storage part
On the rear surface side of the main body inflating part at the time of completion of expansion, a projecting inflating part arranged to project rearward from a position on the center side in the vehicle width direction of the vehicle;
And a configuration comprising
The rear side at the time of completion of inflation is configured as an occupant protection unit capable of protecting the occupant,
The passenger protection section
Front restraint restraint surface that is configured from a rear surface side portion of the main body inflatable portion when the inflation is completed, and can protect the head of the occupant moving forward during a frontal collision of the vehicle,
In the projecting and expanding portion, the center portion of the vehicle in the vehicle width direction is configured by a portion of a side wall portion that extends from the rear surface of the main body expanding portion and protrudes rearward. A slanted constraining surface capable of protecting the head of the occupant moving forward and obliquely forward;
With
A constraining recess for allowing the head of the occupant to enter and restrain between the restraining surface for front projection and the constraining surface for oblique projection is configured so as to be recessed forward. ,
In the main body inflating portion, a detouring recess capable of bypassing a projecting object protruding upward from the instrument panel is provided in a region on the front side of the projecting inflating portion on the instrument panel side when the expansion is completed. A support expansion part capable of supporting the front side of the protruding expansion part is formed;
The left and right tethers arranged substantially along the left-right direction in the main body inflating portion so as to be able to regulate the expansion shape of the portion in the vicinity of the detour concave portion, the portions constituting the detour concave portion at both ends, and the main body An airbag device for a passenger seat, wherein the airbag device is disposed so as to be connected to a wall portion disposed on the outer side in the vehicle width direction of the inflatable portion.   A tether capable of suppressing rearward movement of the constraining recess during deployment and inflation connects the leading end side of the concavity recess and the rear surface of the bypass recess inside the airbag. The airbag device for a passenger seat according to claim 1, wherein the airbag device is disposed as described above.   3. The assistant according to claim 1, wherein the left and right tethers are configured from a horizontal belt-like body that is arranged so that the width direction is substantially along the front-rear direction when the airbag is completely inflated. 4. Seat airbag device.   3. The assistant according to claim 1, wherein the left and right tethers are configured by a vertical belt-like body that is arranged so that the width direction is substantially along the vertical direction when the airbag is completely inflated. 4. Seat airbag device.   The left and right tethers are arranged so that the width direction is substantially along the front-rear direction when the airbag is completely inflated, and the width direction is substantially along the vertical direction when the airbag is completely inflated. The airbag device for a passenger seat according to claim 1, wherein the airbag device is configured to have a vertical belt-like body.

Images