WO2018012363A1 - Air bag - Google Patents

Air bag Download PDF

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Publication number
WO2018012363A1
WO2018012363A1 PCT/JP2017/024612 JP2017024612W WO2018012363A1 WO 2018012363 A1 WO2018012363 A1 WO 2018012363A1 JP 2017024612 W JP2017024612 W JP 2017024612W WO 2018012363 A1 WO2018012363 A1 WO 2018012363A1
Authority
WO
WIPO (PCT)
Prior art keywords
chamber
airbag
tether
rear seat
inflated
Prior art date
Application number
PCT/JP2017/024612
Other languages
French (fr)
Japanese (ja)
Inventor
安部　和宏
アン キエット グエン
Original Assignee
タカタ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2016239722A external-priority patent/JP6885046B2/en
Application filed by タカタ株式会社 filed Critical タカタ株式会社
Priority to US16/316,592 priority Critical patent/US10857965B2/en
Publication of WO2018012363A1 publication Critical patent/WO2018012363A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/214—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in roof panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/2334—Expansion control features
    • B60R21/2338—Tethers

Definitions

  • the present invention relates to an airbag for restraining an automobile occupant, and preferably to a rear seat airbag.
  • WO2016 / 064936A1 describes a rear-seat airbag that inflates so that the side view is U-shaped or inverted U-shaped.
  • WO2014 / 016432A1 describes an airbag for a rear seat that inflates so that the shape in a side view is a square shape.
  • An object of the present invention is to provide an airbag having a large passenger reception area when inflated.
  • an object of the present invention is to provide an airbag in which swinging of the inflated airbag to the rear is suppressed.
  • the airbag of the present invention is an airbag that expands forward of a passenger seated in a seat by gas from an inflator, and includes a first chamber that expands downward and rearward from a passenger compartment ceiling, and a lower portion of the first chamber And a second chamber that expands toward the front.
  • a connecting portion between the first chamber and the second chamber serves as a break point of the airbag when the airbag is inflated.
  • a first tether is provided between a connecting portion of the first chamber and the second chamber or a peripheral portion thereof, and a front portion of the first chamber.
  • a second tether is provided between the second chamber and a front portion of the first chamber.
  • the first tether spanned between the connecting portion of the first chamber and the second chamber or the peripheral portion thereof, and the front portion of the first chamber, and the second tether A chamber, a second tether spanned between the front portion of the first chamber, and a top chamber that expands along the passenger compartment ceiling, wherein the first chamber is a rear portion of the top chamber.
  • the upper ends of the first tether and the second tether are connected to the front portion of the top chamber.
  • the top chamber is fixed to the passenger compartment ceiling at least at two locations in the front-rear direction.
  • the apparatus further includes a third chamber provided between the top chamber and the first chamber.
  • a third tether is provided between a front portion of the top chamber and a connecting portion between the first chamber and the third chamber.
  • the gas flow path width of the connecting portion between the first chamber and the second chamber is narrow.
  • the rear seat airbag has a plurality of tethers extending radially downward from the passenger compartment ceiling in a state where the rear seat airbag is inflated, and each tether is connected to a predetermined portion of the rear seat airbag. ing.
  • an intersection angle between the rear surface of the first chamber and the horizontal plane is 25 ° or more and 65 ° or less in a state where the airbag is inflated.
  • the rear surface of the first chamber is a recess whose left-right direction center portion is retracted forward from the left and right.
  • the rear surface of the first chamber is a left-right center portion and a lower portion in the vertical direction is a convex portion protruding rearward from the left and right.
  • a fourth tether is provided between an intermediate portion in the front-rear direction of the second chamber and an upper portion of the first chamber or a front portion of the upper portion.
  • the left and right width of the first chamber is larger than the left and right width of the second chamber.
  • the airbag of the present invention is an airbag that inflates in front of an occupant seated in a seat by gas from an inflator, and includes a first chamber that inflates downward and rearward from a passenger compartment ceiling, and the first chamber A second chamber is connected to the lower part and expands downward, and a third chamber is connected to the lower part of the second chamber and expands forward.
  • the first and second chambers have a first tether spanned between a connecting portion of the first chamber and the second chamber or a peripheral portion thereof and a front portion of the first chamber.
  • it includes a second tether that is spanned between the third chamber and a front portion of the first chamber.
  • the second tether is connected to a middle portion of the expanded third chamber in the front-rear direction, and a front portion of the third chamber and a connecting portion between the second chamber and the third chamber A third tether is provided between the two.
  • the front portion of the third chamber is positioned higher than the middle portion in the front-rear direction of the third chamber to which the second tether is connected.
  • the airbag has a top chamber that inflates along a vehicle compartment ceiling, the first chamber is connected to a rear portion of the top chamber, and the first tether and the second tether.
  • the upper end of the tether is continuous with the front part of the top chamber.
  • the gas flow path width of the connecting portion between the first chamber and the second chamber and the connecting portion between the second chamber and the third chamber is narrow.
  • the gas flow path width of the connecting portion between the top chamber and the first chamber is narrow.
  • the third chamber expands so that the front part contacts the rear surface of the front seat.
  • the connecting portion between the first chamber and the second chamber is located below the occupant's head.
  • the rear surface of at least one of the first chamber and the second chamber is a concave portion in which the center portion in the left-right direction recedes forward from the left and right.
  • the airbag of the present invention has a first chamber that expands downward and rearward from the vehicle interior ceiling, and a second chamber that expands forward from the lower portion of the first chamber.
  • the first chamber restrains the vicinity of the occupant's head, and the first and second chambers restrain the upper body such as the occupant's chest.
  • This air bag has a large receiving area because the receiving surface for receiving the occupant in the event of a vehicle collision is constituted by the first chamber.
  • the front portion of the airbag hits the front seat or the like, so that the forward movement of the inflated airbag is suppressed.
  • FIG. 3 is a sectional view taken along line III-III in FIG. 1.
  • FIG. 4 is a sectional view taken along line IV-IV in FIG. 1.
  • FIG. 6 is a sectional view taken along line VI-VI in FIG. 5 when the rear seat airbag is inflated. It is a side view at the time of expansion
  • front and rear, and top and bottom coincide with front and rear and top and bottom of an automobile equipped with a rear seat airbag device.
  • FIG. 1 to 6 show a rear seat airbag 1 according to a first embodiment of the present invention.
  • the rear seat airbag 1 is inflated downward or downward and rearward from the vehicle ceiling portion 4 between the front seat 2 and the rear seat 3 of the automobile to restrain the occupant M of the rear seat 3. is there.
  • the rear seat airbag 1 includes a first chamber 11 that expands downward and rearward from the ceiling portion 4, a second chamber 12 that continues to the lower portion of the first chamber 11 and expands downward, A third chamber 13 is connected to the lower portion of the second chamber 12 and expands forward.
  • the rear seat airbag 1 further includes a top chamber 10 that expands along the ceiling portion 4.
  • a first chamber 11 is connected to the rear portion of the top chamber 10.
  • An inflator 14 is installed in the top chamber 10, and the rear seat airbag 1 is inflated by the gas from the inflator 14.
  • the rear seat airbag 1 includes first and second tethers 21 and 22 that connect the front portion of the top chamber 10 and a predetermined portion of the rear seat airbag 1.
  • the first tether 21 is disposed on the front side of the first chamber 11, and the second tether 22 is disposed on the front side of the first and second chambers 11 and 12.
  • the upper ends of the tethers 21 and 22 are sewn to the front portion of the top chamber 10.
  • a lower end (rear end) of the first tether 21 is sewn to a connecting portion (boundary portion) 15 between the first chamber 11 and the second chamber 12.
  • the lower end of the second tether 22 is sewn to the middle part of the third chamber 13 in the front-rear direction (in this embodiment, the vicinity of the middle of the third chamber 13 in the front-rear direction).
  • the rear seat airbag 1 further includes a third tether 23 that is bridged between the front portion of the third chamber 13 and the connecting portion 16 between the second chamber 12 and the third chamber 13.
  • the tip of the third tether 23 is sewn to the front portion of the third chamber 13.
  • the rear end of the third tether 23 is sewn to a connecting portion (boundary portion) 16 between the second chamber 12 and the third chamber 13.
  • the third tether 23 is provided on the upper surface side of the third chamber 13.
  • the connecting portion (boundary portion) 15 between the first chamber 11 and the second chamber 12 is located near the front of the chest or upper abdomen of the rear seat occupant M.
  • the connecting portion (boundary portion) 16 between the second chamber 12 and the third chamber 13 is located near the front of the trunk of the rear seat occupant M.
  • the third chamber 13 expands along the upper surface of the thigh of the rear seat occupant M.
  • the rear seat airbag 1 is manufactured by stitching the front panel 31 and the rear panel 32 as shown in FIGS.
  • FIG. 5 is a plan view of a state in which the rear seat airbag 1 before being inflated is flattened
  • FIG. 6 is a sectional view taken along line VI-VI in FIG. 5 in a state in which the rear seat airbag 1 is inflated.
  • Yes. 3 and 4 are sectional views taken along lines III-III and IV-IV in FIG.
  • the front panel 31 and the rear panel 32 are made of a substantially rectangular base cloth that is long in one direction, and the peripheral portions thereof are stitched together by a suture thread 33.
  • the front panel 31 and the rear panel 32 are also stitched by annular stitches 41 to 49, 51 to 56, 72 to 75 and linear stitches 61 to 71, 76, 77 described below.
  • annular stitches 41, 42, 43 are spaced apart in the width direction of the rear seat airbag 1. Is provided. At the boundary 15 between the first chamber 11 and the second chamber 12, a plurality (three in this embodiment) of annular stitches 44, 45, 46 are spaced in the width direction of the rear seat airbag 1. Opened. At the boundary 16 between the second chamber 12 and the third chamber 13, a plurality of (three in this embodiment) annular stitches 47, 48, 49 are spaced apart in the width direction of the rear seat airbag 1. Opened. Near the tip of the third chamber 13, a plurality (three in this embodiment) of annular stitches 51, 52, 53 are provided at intervals in the width direction of the rear seat airbag 1.
  • An annular seam 54 is provided between the annular seams 47 and 51.
  • An annular seam 56 is provided between the annular seams 49 and 53.
  • An annular seam 55 is provided close to the annular seam 48 and closer to the annular seam 52 than the annular seam 48.
  • Linear stitches 61, 62, 63, 64 are provided so as to sequentially connect the annular stitches 41, 44, 47, 54, 51.
  • Linear stitches 65 and 66 are provided so as to sequentially connect the annular stitches 42, 45 and 48, and linear stitches 67 are provided so as to connect the annular stitches 55 and 52.
  • Linear stitches 68, 69, 70, 71 are provided so as to sequentially connect the annular stitches 43, 46, 49, 56, 53.
  • These straight seams 61 to 64, 65 to 67, and 68 to 71 are parallel to each other and extend in the longitudinal direction of the airbag 1 for the rear seat.
  • annular stitches 72 and 73 are provided on the first chamber 11 side at intervals in the width direction of the rear seat airbag 1.
  • annular seams 74 and 75 are provided in the vicinity of the front end of the top chamber 10 at intervals in the width direction of the rear seat airbag 1.
  • a straight seam 76 is provided so as to connect the annular seams 72 and 74.
  • a straight seam 77 is provided so as to connect the annular seams 73 and 75.
  • the straight seams 76 and 77 are parallel to each other and extend in the longitudinal direction of the rear seat airbag 1.
  • the inflator 14 is disposed between the straight stitches 76 and 77.
  • the inflator 14 is a cylinder type, and a stud bolt 14a is projected from the side surface of the inflator 14 as shown in FIG.
  • the stud bolt 14a protrudes out of the rear seat airbag 1 through a bolt insertion hole provided in the rear panel 32, and is fixed to the case of the rear seat airbag device.
  • the inflator 14 is disposed so that the gas ejection port is on the first chamber 11 side.
  • the inflation thickness of the rear seat airbag 1 is regulated by the annular stitches 41 to 49, 51 to 56, 72 to 75 and the straight stitches 61 to 71, 76, 77.
  • the gas flow path width is narrowed at the annular seams 41 to 43, that is, at the connecting portion (boundary portion) 17 between the top chamber 10 and the first chamber 11, and the rear
  • the connecting portion (boundary portion) 17 between the top chamber 10 and the first chamber 11 and the rear is easily bent at this portion.
  • the connecting portion (boundary portion) between the first chamber 11 and the second chamber 12 is used. 15 and the connecting portion (boundary portion) 16 between the second chamber 12 and the third chamber 13 make the rear seat airbag 1 easily bent.
  • the upper ends of the first and second tethers 21 and 22 are sewn into the annular stitches 74 and 75.
  • the lower end (rear end) of the first tether 21 is sewn into the annular stitches 44 and 46 as shown in FIG. Reference numeral 21a in FIG. 6 indicates this suture thread.
  • the lower end of the second tether 22 is sewn into the annular stitches 54 and 56.
  • the front end of the third tether 23 is sewn into the annular stitches 51 and 53, and the rear end is sewn into the annular stitches 47 and 49.
  • the rear-seat airbag 1 configured in this manner is folded, disposed in the ceiling portion 4, and covered with a roof garnish.
  • the inflator 14 is insufflated and the rear seat airbag 1 is inflated.
  • the top chamber 10 expands along the ceiling portion 4, and the first chamber 11 expands obliquely downward and rearward from the rear end of the top chamber 10.
  • the second chamber 12 expands downward from the lower end of the first chamber 11, and the third chamber 13 extends forward from the lower end of the second chamber 12 along the upper surface of the thigh of the rear seat occupant M. Inflate.
  • the front end of the third chamber 13 contacts the rear surface of the front seat 2.
  • the connecting portion 15 between the first chamber 11 and the second chamber 12 When the connecting portion 15 between the first chamber 11 and the second chamber 12 is pulled forward and upward by the first tether 21, the first chamber 11 and the second chamber 12 expand to a position along the front surface of the rear seat occupant M. To do. At this time, the first chamber 11 is inclined so as to be forward as it goes upward, and the second chamber 12 is slightly inclined so as to be forward as it is substantially vertically downward or downward.
  • the connecting portion 15 between the first chamber 11 and the second chamber 12 is positioned lower than the head of the occupant M.
  • the chest-abdomen of the rear seat occupant M is restrained by the inflated second chamber 12 and the head is restrained by the first chamber 11. Since the first chamber 11 is wide and substantially flat in front of the head, and the second chamber 12 is wide and substantially flat in front of the chest or torso, the receiving area for receiving the occupant M is large.
  • the front end of the third chamber 13 of the rear seat airbag 1 inflated in this way comes into contact with the rear surface of the front seat 2 so that the forward movement of the first chamber 11 and the second chamber 12 is suppressed.
  • the length of the third tether 23 is such that the front end of the third chamber 13 is higher than the middle part of the third chamber 13 in the front-rear direction (the connecting portion of the second tether 22). Is set. Therefore, even if the position of the front seat 2 is located at the foremost part of the seat adjuster or the rearmost part of the seat adjuster, the front end of the third chamber 13 tends to come into contact with the rear surface of the front seat 2.
  • the rear seat airbag 1 shown in FIGS. 1 to 6 is configured to bend at the connecting portion between the chambers 10, 11, 12, and 13 when inflated.
  • the rear seat airbag 1 ′ shown in FIG. As described above, the side view shape may be curved in a C shape without being bent at the time of expansion. 7 denote the same parts as those in FIG.
  • the present invention may have a configuration other than that illustrated.
  • the third tether 23 is provided in the rear seat airbag 1, 1 ′, but the third tether 23 may be omitted.
  • the top chamber 10 may be omitted, and the gas ejected from the inflator 14 may be directly introduced into the first chamber 11.
  • the upper ends of the first and second tethers 21 and 22 may be connected to a vehicle member ahead of the rear seat airbag, for example, a case of a rear seat airbag device.
  • the center in the left-right direction of the rear surface of at least one of the first chamber 11 and the second chamber 12 may be recessed forward of the vehicle as compared to the left and right sides.
  • the rear seat occupant is received substantially perpendicularly to the left half side or the right half side of the rear surface of the first chamber or the second chamber in the case of an oblique collision or an offset collision.
  • FIGSecond Embodiment 8 and 9 show a rear seat airbag 101 according to a second embodiment of the present invention.
  • the rear seat airbag 101 is inflated downward or downward and rearward from the vehicle ceiling 104 between the front seat 102 and the rear seat 103 of the automobile to restrain the occupant M of the rear seat 103. is there.
  • the rear seat airbag 101 includes a first chamber 111 that expands downward and rearward from the ceiling 104, and a second chamber 112 that is connected to the lower portion of the first chamber 111 and expands forward. .
  • the rear seat airbag 101 further includes a top chamber 110 that expands along the ceiling 104.
  • the upper part of the first chamber 111 is connected to the rear part of the top chamber 110.
  • An inflator 114 is installed in the top chamber 110, and the rear seat airbag 101 is inflated by the gas from the inflator 114.
  • the top chamber 110 is attached and fixed to the ceiling 104 at at least two places in the vehicle front-rear direction.
  • the rear seat airbag 101 includes first and second tethers 121 and 122 that connect the front portion of the top chamber 110 and a predetermined portion of the rear seat airbag 101.
  • the first tether 121 is disposed on the front side of the first chamber 111
  • the second tether 122 is disposed on the front side of the first chamber 111 and on the upper side of the second chamber 112.
  • the upper ends of the tethers 121 and 122 are sewn to the front portion of the top chamber 110.
  • the lower end (rear end) of the first tether 121 is sewn to the connecting portion (boundary portion) 115 between the first chamber 111 and the second chamber 112 or its peripheral portion.
  • the lower end of the second tether 122 is sewn to the front portion of the second chamber 112.
  • the rear seat airbag 101 is manufactured by stitching the front panel and the rear panel in the same manner as the rear seat airbag 1 according to the first embodiment.
  • the sewing method of the first and second tethers 121 and 122 is the same as that in the first embodiment.
  • an annular seam is provided so that the rear seat airbag 1 is easily bent at the connecting portion (boundary portion) 115 between the first chamber 111 and the second chamber 112.
  • the gas flow path width is narrow.
  • an annular seam is provided so that the rear seat airbag 1 is easily bent at the connecting portion (boundary portion) 117 between the top chamber 110 and the first chamber 111, and the gas flow path width is reduced. Yes.
  • the rear-seat airbag 101 configured in this manner is folded, disposed in the ceiling portion 104, and covered with a roof garnish.
  • the inflator 114 is operated to eject gas, and the rear seat airbag 101 is inflated.
  • the top chamber 110 expands along the ceiling 104, and the first chamber 111 expands obliquely downward and rearward from the rear end of the top chamber 110.
  • the second chamber 112 expands above the thigh of the rear seat occupant M from the lower end of the first chamber 111 toward the front.
  • the front end of the second chamber 112 contacts the rear surface of the front seat 102.
  • the first tether 121 and the second tether 122 expand radially from the ceiling 104 (the front of the top chamber 110) downward (downward, forward, downward, and backward). Tighten.
  • the first tether 121 pulls the connecting portion 115 between the first chamber 111 and the second chamber 112 forward and upward, and the second tether 122 pulls the front portion of the second chamber 112 upward, whereby the first chamber 111 and the second chamber 112 expand in front of the rear seat occupant M.
  • the first chamber 111 is inclined so as to be forward in the upward direction
  • the second chamber 112 is slightly inclined so as to be substantially horizontal or downward in the forward direction.
  • the connecting portion 115 between the first chamber 111 and the second chamber 112 is positioned lower than the head of the occupant M.
  • the head of the seat occupant M is restrained by the first chamber 111.
  • Additional tethers other than the tethers 121 and 122 may be further provided in a region surrounded by the top chamber 110, the first chamber 111, the second chamber 112, and the tether 122 in a side view of the inflated rear seat airbag 101. .
  • the additional tethers are preferably provided so as to expand radially downward from the ceiling 104 together with the tethers 121 and 122.
  • the locations where the upper ends of the tethers 121 and 122 are sewn may be the same or different.
  • a third chamber 113 may be added between the top chamber 110 and the first chamber 111.
  • the third chamber 113 expands downward or downward and rearward from the ceiling portion 104, the upper portion of the third chamber 113 is connected to the rear portion of the top chamber 110, and the lower portion of the third chamber 113 is connected to the upper portion of the first chamber 111. It will be a series.
  • a third tether 123 that connects the connecting portion (boundary portion) 118 between the third chamber 113 and the first chamber 111 and the front portion of the top chamber 110.
  • the inclination angle ⁇ is preferably about 25 ° to 65 °, particularly about 40 ° to 50 °.
  • the rear seat airbags 1 and 101 sew the peripheral portions of the front panel and the rear panel made of a substantially rectangular base fabric, and connect portions (boundary portions) of the respective chambers.
  • each chamber is composed of different panels, and the peripheral edges of the communication holes H are sewn and connected to each other. You may make it communicate inside.
  • the left and right side portions of the second chamber 112 of the rear seat airbag 101 according to the second embodiment are omitted, and the left and right width of the entire second chamber 112 is set to the left and right width of the first chamber 111. It may be smaller. In other words, the left end and the right end of the first chamber (upper chamber) 111 may protrude to the left and right sides of the left end and the right end of the second chamber (lower chamber) 112. For example, the lateral width of the second chamber 112 is made smaller than the shoulder width of the rear seat occupant M.
  • the left-right width of the first chamber 111 is larger than the left-right width of the second chamber 112 and has a larger occupant receiving area, and restrains the occupant head.
  • the left and right widths of the lower chamber composed of the second chamber 12 and the third chamber 13 of the rear seat airbag 1 according to the first embodiment are set to the upper portion composed of the first chamber 11. You may make it smaller than the left-right width of a chamber.
  • the fourth portion that connects the connecting portion between the third chamber 113 and the top chamber 110 and the middle portion of the second chamber 112 in the front-rear direction (for example, the vicinity of the middle of the second chamber 112 in the front-rear direction).
  • a tether 124 may be further provided.
  • the upper ends (front ends) of the first tether 121, the second tether 122, and the third tether 123 may be coupled to the ceiling portion 104 in front of the top chamber 110, for example, a vehicle body member or an airbag case.
  • the middle portion in the front-rear direction does not bend downward in the second chamber 112 and expands and expands almost straight.
  • the upper end of the fourth tether 124 is connected to the same location as the upper ends of the first tether 121, the second tether 122, and the third tether 123, and the four tethers radiate downward from the ceiling portion 104. You may make it extend.
  • FIG. 17 to 19 show a rear seat airbag 201 according to a third embodiment of the present invention.
  • the rear-seat airbag 201 is inflated downward or downward and rearward from the vehicle ceiling 204 between the front seat 202 and the rear seat 203 of the automobile to restrain the occupant M of the rear seat 203. is there.
  • the rear seat airbag 201 includes a first chamber 211 that expands downward and rearward from the ceiling portion 204, and a second chamber 212 that continues to the lower portion of the first chamber 211 and expands forward. .
  • the rear seat airbag 201 further includes a top chamber 210 that inflates along the ceiling portion 204.
  • the upper portion of the first chamber 211 is connected to the rear portion of the top chamber 210.
  • An inflator 214 is installed in the top chamber 210, and the rear seat airbag 201 is inflated by the gas from the inflator 214.
  • the top chamber 210 is attached and fixed to the ceiling portion 204 at at least two locations in the vehicle longitudinal direction.
  • the rear seat airbag 201 includes a first tether 221, a second tether 222, and a third tether 223 that connect the ceiling portion 204 ahead of the top chamber 210 and a predetermined portion of the rear seat airbag 201. Yes.
  • illustration of the tethers 221, 222, and 223 is omitted.
  • the upper ends of the tethers 221, 222, and 223 are connected to a ceiling portion 204 in front of the top chamber 210, for example, a vehicle body member or an airbag case.
  • the lower end (rear end) of the first tether 221 is sewn to the connecting portion (boundary portion) 215 between the first chamber 211 and the second chamber 212 or its peripheral portion.
  • the lower end of the second tether 222 is sewn to the front portion (front end portion) of the second chamber 212.
  • the lower end (rear end) of the third tether 223 is sewn to the connecting portion (boundary portion) 217 between the first chamber 211 and the top chamber 210 or its peripheral portion.
  • a recess 281 that is recessed toward the front of the vehicle compared to the left and right sides is provided at the center in the left-right direction on the rear surface of the first chamber 211 and slightly above the center in the up-down direction.
  • a convex portion 282 is provided at the lower portion of the rear surface of the first chamber 211 and at the center in the left-right direction so as to protrude and protrude in the rear of the vehicle in comparison with the left and right sides.
  • FIG. 19 is a plan view showing a state in which the rear seat airbag 201 before being inflated is flattened.
  • the rear seat airbag 201 is manufactured by stitching a front panel 231 and a rear panel (not shown).
  • the front panel 231 and the rear panel are made of a substantially rectangular base cloth that is long in one direction, and their peripheral edges are stitched together by stitches 268.
  • the front panel 231 and the rear panel are also stitched by annular stitches 241 to 248 and linear stitches 261 to 267 which will be described below.
  • a plurality of (three in this embodiment) annular stitches 241, 242, and 243 are spaced apart in the width direction of the rear seat airbag 201 at the boundary 217 between the top chamber 210 and the first chamber 211. Is provided.
  • annular stitches 244, 245, 246 are spaced apart in the width direction of the rear seat airbag 201. Opened.
  • annular seams 247 and 248 are provided at an interval.
  • a slit S extending in the longitudinal direction of the rear seat airbag 201 is formed inside the annular seam 247.
  • a linear stitch 261 is provided so as to connect the annular stitch 241 and the annular stitch 244.
  • a straight stitch 262 extending in the longitudinal direction of the rear seat airbag 201 is provided so as to connect the annular stitch 244 and the stitch 268 on the front end side of the rear seat airbag 201.
  • a linear stitch 266 is provided so as to connect the annular stitch 243 and the annular stitch 246.
  • a straight stitch 267 extending in the longitudinal direction of the rear seat airbag 201 is provided so as to connect the annular stitch 246 and the stitch 268 on the front end side of the rear seat airbag 201.
  • linear seams 263, 264 are provided so as to sequentially connect the annular seams 242, 247, 248.
  • a straight seam 265 extending in the longitudinal direction of the rear seat airbag 201 is provided so as to connect the annular stitch 248 and the stitch 268 on the front end side of the rear seat airbag 201.
  • No seam is provided between the annular seam 245 and the annular seam 248.
  • a region surrounded by the annular stitches 244, 245, 246, and 248 becomes the above-described convex portion 282 when the rear seat airbag 201 is inflated.
  • the portion where the slit S is formed becomes the above-described recess 281 when the rear seat airbag 201 is inflated.
  • the end of the top chamber 210 in the longitudinal direction has a narrow width and is an inflator deployment chamber 284 in which the inflator 214 is deployed.
  • the inflator 214 is a cylinder type.
  • the inflator 214 is disposed so that the gas ejection port is on the rear side.
  • the lower end (rear end) of the third tether 223 is sewn inside the annular stitches 241, 242, and 243.
  • the lower end (rear end) of the first tether 221 is sewn inside the annular stitches 244, 245, and 246.
  • the lower end of the second tether 222 is sewn to the front end portion of the front panel 231.
  • the rear seat airbag 201 configured in this manner is folded, placed in the ceiling portion 204, and covered with a roof garnish.
  • the inflator 214 operates to inject gas, and the rear seat airbag 201 is inflated.
  • the top chamber 210 expands along the ceiling portion 204, and the first chamber 211 expands obliquely downward and rearward from the rear end of the top chamber 10.
  • the second chamber 212 expands from the lower end of the first chamber 211 toward the front.
  • the first chamber 211 In the inflated state, the first chamber 211 is widely deployed in front of the upper body of the occupant M.
  • the jaw portion of the occupant M is restrained by a convex portion 282 formed at the lower portion of the rear surface of the first chamber 211 and at the center in the left-right direction.
  • the forehead portion of the occupant M is restrained by the concave portion 281 formed on the rear surface of the first chamber 211 and above the convex portion 282.
  • the recess 281 is formed by the slit S, but a circular opening may be provided in the annular seam 247 to form the recess 281 when the inflation is completed.
  • the rear seat airbags 1, 101, 201 have been described.
  • the rear seat airbags 1, 101, 201 may be configured to be inflated in front of the occupant, and can be applied to a driver seat, a passenger seat, and other seats.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

Provided is an air bag having a large occupant-receiving area when expanded. The air bag 1 has: a top chamber 10, which expands along a ceiling part 4; a first chamber 11, which expands downwards and rearwards from the rear part of the top chamber 10; a second chamber 12 continuous from the lower part of the first chamber 11, the second chamber expanding downwards; and a third chamber 13 continuous from the lower part of the second chamber 12, the third chamber 13 expanding forwards. The expanded first chamber 11 restrains the head of an occupant, and the second chamber 12 restrains the chest to the trunk.

Description

エアバッグAirbag
　本発明は、自動車の乗員を拘束するためのエアバッグに係り、好適には後席用エアバッグに関する。 The present invention relates to an airbag for restraining an automobile occupant, and preferably to a rear seat airbag.
　後席乗員を拘束するための後席用エアバッグとして、ＷＯ２０１６／０６４９３６Ａ１には、側面視形状がＵ字形又は逆Ｕ字形となるように膨張する後席用エアバッグが記載されている。 As a rear-seat airbag for restraining the rear-seat occupant, WO2016 / 064936A1 describes a rear-seat airbag that inflates so that the side view is U-shaped or inverted U-shaped.
　ＷＯ２０１４／０１６４３２Ａ１には、側面視形状がく字形となるように膨張する後席用エアバッグが記載されている。 WO2014 / 016432A1 describes an airbag for a rear seat that inflates so that the shape in a side view is a square shape.
国際公開２０１６／０６４９３６号公報International Publication No. 2016/064936 国際公開２０１４／０１６４３２号公報International Publication No. 2014/016432
　本発明は、膨張時の乗員受承面積が大きいエアバッグを提供することを目的とする。 An object of the present invention is to provide an airbag having a large passenger reception area when inflated.
　本発明は、その一態様において、膨張したエアバッグの後方への揺動が抑制されるエアバッグを提供することを目的とする。 In one aspect of the present invention, an object of the present invention is to provide an airbag in which swinging of the inflated airbag to the rear is suppressed.
　本発明のエアバッグは、インフレータからのガスによって座席に着席した乗員の前方に膨張するエアバッグにおいて、車室天井部から下方かつ後方に向って膨張する第１チャンバと、該第１チャンバの下部に連なり、前方に向って膨張する第２チャンバと、を有することを特徴とするものである。 The airbag of the present invention is an airbag that expands forward of a passenger seated in a seat by gas from an inflator, and includes a first chamber that expands downward and rearward from a passenger compartment ceiling, and a lower portion of the first chamber And a second chamber that expands toward the front.
　本発明の一態様では、前記エアバッグが膨張した状態で、前記第１チャンバと前記第２チャンバとの連結部が該エアバッグの折れ点となることを特徴とする。 In one aspect of the present invention, a connecting portion between the first chamber and the second chamber serves as a break point of the airbag when the airbag is inflated.
　本発明の一態様では、前記第１チャンバと前記第２チャンバとの連結部又はその周辺部と、該第１チャンバよりも前方部分との間に架け渡された第１テザーを有する。 In one aspect of the present invention, a first tether is provided between a connecting portion of the first chamber and the second chamber or a peripheral portion thereof, and a front portion of the first chamber.
　本発明の一態様では、前記第２チャンバと、前記第１チャンバよりも前方部分との間に架け渡された第２テザーを有する。 In one aspect of the present invention, a second tether is provided between the second chamber and a front portion of the first chamber.
　本発明の一態様では、前記第１チャンバと前記第２チャンバとの連結部又はその周辺部と、該第１チャンバよりも前方部分との間に架け渡された第１テザーと、該第２チャンバと、該第１チャンバよりも前方部分との間に架け渡された第２テザーと、車室天井に沿って膨張するトップチャンバと、をさらに備え、該第１チャンバは該トップチャンバの後部に連なっており、該第１テザー及び該第２テザーの上端は該トップチャンバの前部に連なっている。 In one aspect of the present invention, the first tether spanned between the connecting portion of the first chamber and the second chamber or the peripheral portion thereof, and the front portion of the first chamber, and the second tether A chamber, a second tether spanned between the front portion of the first chamber, and a top chamber that expands along the passenger compartment ceiling, wherein the first chamber is a rear portion of the top chamber. The upper ends of the first tether and the second tether are connected to the front portion of the top chamber.
　本発明の一態様では、前記トップチャンバは少なくとも前後方向の２ヶ所で車室天井部に固定されている。 In one aspect of the present invention, the top chamber is fixed to the passenger compartment ceiling at least at two locations in the front-rear direction.
　本発明の一態様では、前記トップチャンバと前記第１チャンバとの間に設けられた第３チャンバをさらに備える。 In one aspect of the present invention, the apparatus further includes a third chamber provided between the top chamber and the first chamber.
　本発明の一態様では、前記トップチャンバの前部と、前記第１チャンバと前記第３チャンバとの連結部との間に架け渡された第３テザーを有する。 In one aspect of the present invention, a third tether is provided between a front portion of the top chamber and a connecting portion between the first chamber and the third chamber.
　本発明の一態様では、前記第１チャンバと前記第２チャンバとの連結部は、ガス流路幅が狭くなっている。 In one aspect of the present invention, the gas flow path width of the connecting portion between the first chamber and the second chamber is narrow.
　本発明の一態様では、前記後席用エアバッグが膨張した状態で、車室天井部から下方へ放射状にのびる複数のテザーを有し、各テザーは該後席用エアバッグの所定部分に連なっている。 In one aspect of the present invention, the rear seat airbag has a plurality of tethers extending radially downward from the passenger compartment ceiling in a state where the rear seat airbag is inflated, and each tether is connected to a predetermined portion of the rear seat airbag. ing.
　本発明の一態様では、前記エアバッグが膨張した状態で、前記第１チャンバの後面と水平面との交角が２５°以上６５°以下となる。 In one aspect of the present invention, an intersection angle between the rear surface of the first chamber and the horizontal plane is 25 ° or more and 65 ° or less in a state where the airbag is inflated.
　本発明の一態様では、前記エアバッグが膨張した状態で、前記第１チャンバの後面は、左右方向センター部がその左右よりも前方に後退した凹部となっている。 In one aspect of the present invention, in the state in which the airbag is inflated, the rear surface of the first chamber is a recess whose left-right direction center portion is retracted forward from the left and right.
　本発明の一態様では、前記エアバッグが膨張した状態で、前記第１チャンバの後面は、左右方向センター部かつ上下方向の下部が、その左右よりも後方に突出した凸部となっている。 In one aspect of the present invention, in the state in which the airbag is inflated, the rear surface of the first chamber is a left-right center portion and a lower portion in the vertical direction is a convex portion protruding rearward from the left and right.
　本発明の一態様では、前記第２チャンバの前後方向の中間部と、前記第１チャンバの上部又は該上部よりも前方部分との間に架け渡された第４テザーを有する。 In one aspect of the present invention, a fourth tether is provided between an intermediate portion in the front-rear direction of the second chamber and an upper portion of the first chamber or a front portion of the upper portion.
　本発明の一態様では、前記第１チャンバの左右幅は、前記第２チャンバの左右幅よりも大きい。 In one aspect of the present invention, the left and right width of the first chamber is larger than the left and right width of the second chamber.
　本発明のエアバッグは、インフレータからのガスによって、座席に着席した乗員の前方に膨張するエアバッグにおいて、車室天井部から下方かつ後方に向って膨張する第１チャンバと、該第１チャンバの下部に連なり、下方に向って膨張する第２チャンバと、該第２チャンバの下部に連なり、前方に向って膨張する第３チャンバとを有することを特徴とするものである。 The airbag of the present invention is an airbag that inflates in front of an occupant seated in a seat by gas from an inflator, and includes a first chamber that inflates downward and rearward from a passenger compartment ceiling, and the first chamber A second chamber is connected to the lower part and expands downward, and a third chamber is connected to the lower part of the second chamber and expands forward.
　本発明の一態様では、前記第１チャンバと第２チャンバとの連結部もしくはその周辺部と、該第１チャンバよりも前方部分との間に架け渡された第１テザーを有する。 In one aspect of the present invention, the first and second chambers have a first tether spanned between a connecting portion of the first chamber and the second chamber or a peripheral portion thereof and a front portion of the first chamber.
　本発明の一態様では、前記第３チャンバと、該第１チャンバよりも前方部分との間に架け渡された第２テザーを有する。 In one aspect of the present invention, it includes a second tether that is spanned between the third chamber and a front portion of the first chamber.
　本発明の一態様では、前記第２テザーは膨張した前記第３チャンバの前後方向の途中部分に連なっており、該第３チャンバの前部と、該第２チャンバと第３チャンバとの連結部との間に架け渡された第３テザーが設けられている。 In one aspect of the present invention, the second tether is connected to a middle portion of the expanded third chamber in the front-rear direction, and a front portion of the third chamber and a connecting portion between the second chamber and the third chamber A third tether is provided between the two.
　本発明の一態様では、前記エアバッグが膨張した状態において、第３チャンバ前部は、第２テザーが連結された第３チャンバの前後方向の途中部分よりも高位に位置する。 In one aspect of the present invention, in the state where the airbag is inflated, the front portion of the third chamber is positioned higher than the middle portion in the front-rear direction of the third chamber to which the second tether is connected.
　本発明の一態様では、前記エアバッグは、車室天井に沿って膨張するトップチャンバを有しており、前記第１チャンバは該トップチャンバの後部に連なっており、前記第１テザー及び第２テザーの上端は該トップチャンバの前部に連なっている。 In one aspect of the present invention, the airbag has a top chamber that inflates along a vehicle compartment ceiling, the first chamber is connected to a rear portion of the top chamber, and the first tether and the second tether. The upper end of the tether is continuous with the front part of the top chamber.
　本発明の一態様では、前記第１チャンバと第２チャンバとの連結部及び第２チャンバと第３チャンバの連結部は、ガス流路幅が狭くなっている。 In one aspect of the present invention, the gas flow path width of the connecting portion between the first chamber and the second chamber and the connecting portion between the second chamber and the third chamber is narrow.
　本発明の一態様では、前記トップチャンバと第１チャンバとの連結部は、ガス流路幅が狭くなっている。 In one aspect of the present invention, the gas flow path width of the connecting portion between the top chamber and the first chamber is narrow.
　本発明の一態様では、前記第３チャンバは、前部が前席の後面に当接するように膨張する。 In one aspect of the present invention, the third chamber expands so that the front part contacts the rear surface of the front seat.
　本発明の一態様では、前記第１チャンバと第２チャンバとの連結部は、乗員の頭部よりも下方に位置する。 In one aspect of the present invention, the connecting portion between the first chamber and the second chamber is located below the occupant's head.
　本発明の一態様では、前記第１チャンバ及び第２チャンバの少なくとも一方の後面は、左右方向センター部がその左右よりも前方に後退した凹部となっている。 In one aspect of the present invention, the rear surface of at least one of the first chamber and the second chamber is a concave portion in which the center portion in the left-right direction recedes forward from the left and right.
　本発明のエアバッグは、車室天井部から下方かつ後方に向って膨張する第１チャンバと、該第１チャンバの下部から前方に向って膨張する第２チャンバを有している。車両衝突時には、第１チャンバが乗員の頭部付近を拘束し、第１及び第２チャンバが乗員の胸などの上半身を拘束する。 The airbag of the present invention has a first chamber that expands downward and rearward from the vehicle interior ceiling, and a second chamber that expands forward from the lower portion of the first chamber. In the event of a vehicle collision, the first chamber restrains the vicinity of the occupant's head, and the first and second chambers restrain the upper body such as the occupant's chest.
　このエアバッグは、車両衝突時に乗員を受け止める受承面が第１チャンバによって構成されるので、受承面積が大きい。 This air bag has a large receiving area because the receiving surface for receiving the occupant in the event of a vehicle collision is constituted by the first chamber.
　本発明のエアバッグは、前部が前席等に当ることにより、膨張したエアバッグの前方移動が抑制される。 In the airbag of the present invention, the front portion of the airbag hits the front seat or the like, so that the forward movement of the inflated airbag is suppressed.
第１の実施形態に係る後席用エアバッグの膨張時の側面図である。It is a side view at the time of expansion of the airbag for backseats concerning a 1st embodiment. 第１の実施形態に係る後席用エアバッグの膨張時の斜視図である。It is a perspective view at the time of expansion of the airbag for backseats concerning a 1st embodiment. 図１のIII－III線断面図である。FIG. 3 is a sectional view taken along line III-III in FIG. 1. 図１のIV－IV線断面図である。FIG. 4 is a sectional view taken along line IV-IV in FIG. 1. 第１の実施形態に係る後席用エアバッグの非膨張状態における平面図である。It is a top view in the non-inflation state of the airbag for backseats concerning a 1st embodiment. 後席用エアバッグ膨張時における図５のVI－VI線断面図である。FIG. 6 is a sectional view taken along line VI-VI in FIG. 5 when the rear seat airbag is inflated. 変形例による後席用エアバッグの膨張時の側面図である。It is a side view at the time of expansion | swelling of the airbag for rear seats by a modification. 第２の実施形態に係る後席用エアバッグの膨張時の側面図である。It is a side view at the time of expansion | swelling of the airbag for rear seats concerning 2nd Embodiment. 第２の実施形態に係る後席用エアバッグの膨張時の斜視図である。It is a perspective view at the time of expansion | swelling of the airbag for rear seats which concerns on 2nd Embodiment. 変形例による後席用エアバッグの膨張時の側面図である。It is a side view at the time of expansion | swelling of the airbag for rear seats by a modification. 変形例による後席用エアバッグの部分断面図である。It is a fragmentary sectional view of the airbag for backseats by a modification. 変形例による後席用エアバッグの膨張時の斜視図である。It is a perspective view at the time of expansion | swelling of the airbag for rear seats by a modification. 変形例による後席用エアバッグの乗員拘束時の側面図である。It is a side view at the time of passenger | crew restraint of the airbag for rear seats by a modification. 変形例による後席用エアバッグの膨張時の斜視図である。It is a perspective view at the time of expansion | swelling of the airbag for rear seats by a modification. 変形例による後席用エアバッグの膨張時の側面図である。It is a side view at the time of expansion | swelling of the airbag for rear seats by a modification. 変形例による後席用エアバッグの膨張時の側面図である。It is a side view at the time of expansion | swelling of the airbag for rear seats by a modification. 第３の実施形態に係る後席用エアバッグの膨張時の側面図である。It is a side view at the time of expansion | swelling of the airbag for backseats concerning 3rd Embodiment. 第３の実施形態に係る後席用エアバッグの膨張時の斜視図である。It is a perspective view at the time of expansion | swelling of the airbag for backseats concerning 3rd Embodiment. 第３の実施形態に係る後席用エアバッグの非膨張状態における平面図である。It is a top view in the non-inflation state of the airbag for backseats concerning a 3rd embodiment.
　以下、図面を参照して実施の形態について説明する。なお、以下の説明において、前後、及び上下は後席用エアバッグ装置を備えた自動車の前後及び上下に一致する。 Hereinafter, embodiments will be described with reference to the drawings. In the following description, front and rear, and top and bottom coincide with front and rear and top and bottom of an automobile equipped with a rear seat airbag device.
　［第１の実施形態］
　図１～６は本発明の第１の実施形態に係る後席用エアバッグ１を示す。この後席用エアバッグ１は、自動車の前席２と後席３との間の車両の天井部４から下方ないし下方かつ後方に膨張して後席３の乗員Ｍを拘束するためのものである。 [First Embodiment]
1 to 6 show a rear seat airbag 1 according to a first embodiment of the present invention. The rear seat airbag 1 is inflated downward or downward and rearward from the vehicle ceiling portion 4 between the front seat 2 and the rear seat 3 of the automobile to restrain the occupant M of the rear seat 3. is there.
　この後席用エアバッグ１は、天井部４から下方かつ後方に向って膨張する第１チャンバ１１と、該第１チャンバ１１の下部に連なり、下方に向って膨張する第２チャンバ１２と、該第２チャンバ１２の下部に連なり、前方に向って膨張する第３チャンバ１３とを有する。 The rear seat airbag 1 includes a first chamber 11 that expands downward and rearward from the ceiling portion 4, a second chamber 12 that continues to the lower portion of the first chamber 11 and expands downward, A third chamber 13 is connected to the lower portion of the second chamber 12 and expands forward.
　この実施の形態では、後席用エアバッグ１は天井部４に沿って膨張するトップチャンバ１０をさらに有する。このトップチャンバ１０の後部に第１チャンバ１１が連なっている。トップチャンバ１０内にインフレータ１４が設置されており、該インフレータ１４からのガスによって後席用エアバッグ１が膨張する。 In this embodiment, the rear seat airbag 1 further includes a top chamber 10 that expands along the ceiling portion 4. A first chamber 11 is connected to the rear portion of the top chamber 10. An inflator 14 is installed in the top chamber 10, and the rear seat airbag 1 is inflated by the gas from the inflator 14.
　この後席用エアバッグ１は、トップチャンバ１０の前部と、後席用エアバッグ１の所定部分とを連結する第１及び第２テザー２１，２２を備えている。 The rear seat airbag 1 includes first and second tethers 21 and 22 that connect the front portion of the top chamber 10 and a predetermined portion of the rear seat airbag 1.
　第１テザー２１は第１チャンバ１１の前方側に配置され、第２テザー２２は第１及び第２チャンバ１１，１２の前方側に配置されている。各テザー２１，２２の上端は該トップチャンバ１０の前部に縫着されている。第１テザー２１の下端（後端）は、第１チャンバ１１と第２チャンバ１２との連結部（境界部）１５に縫着されている。第２テザー２２の下端は、第３チャンバ１３の前後方向の途中部分（この実施の形態では、第３チャンバ１３の前後方向の中間付近）に縫着されている。 The first tether 21 is disposed on the front side of the first chamber 11, and the second tether 22 is disposed on the front side of the first and second chambers 11 and 12. The upper ends of the tethers 21 and 22 are sewn to the front portion of the top chamber 10. A lower end (rear end) of the first tether 21 is sewn to a connecting portion (boundary portion) 15 between the first chamber 11 and the second chamber 12. The lower end of the second tether 22 is sewn to the middle part of the third chamber 13 in the front-rear direction (in this embodiment, the vicinity of the middle of the third chamber 13 in the front-rear direction).
　この後席用エアバッグ１は、第３チャンバ１３の前部と、第２チャンバ１２と第３チャンバ１３との連結部１６との間に架け渡された第３テザー２３を更に備えている。第３テザー２３の先端は、第３チャンバ１３の前部に縫着されている。第３テザー２３の後端は、第２チャンバ１２と第３チャンバ１３との連結部（境界部）１６に縫着されている。第３テザー２３は、第３チャンバ１３の上面側に設けられている。 The rear seat airbag 1 further includes a third tether 23 that is bridged between the front portion of the third chamber 13 and the connecting portion 16 between the second chamber 12 and the third chamber 13. The tip of the third tether 23 is sewn to the front portion of the third chamber 13. The rear end of the third tether 23 is sewn to a connecting portion (boundary portion) 16 between the second chamber 12 and the third chamber 13. The third tether 23 is provided on the upper surface side of the third chamber 13.
　第１チャンバ１１と第２チャンバ１２との連結部（境界部）１５は、後席乗員Ｍの胸ないし上腹部の前方付近に位置する。第２チャンバ１２と第３チャンバ１３との連結部（境界部）１６は、後席乗員Ｍの胴部の前方付近に位置する。第３チャンバ１３は、後席乗員Ｍの大腿部の上面に沿って膨張する。 The connecting portion (boundary portion) 15 between the first chamber 11 and the second chamber 12 is located near the front of the chest or upper abdomen of the rear seat occupant M. The connecting portion (boundary portion) 16 between the second chamber 12 and the third chamber 13 is located near the front of the trunk of the rear seat occupant M. The third chamber 13 expands along the upper surface of the thigh of the rear seat occupant M.
　この後席用エアバッグ１は、図３～６に示される通り、フロントパネル３１とリアパネル３２とを縫合することにより製作されたものである。 The rear seat airbag 1 is manufactured by stitching the front panel 31 and the rear panel 32 as shown in FIGS.
　図５は、膨張前の後席用エアバッグ１を平たく広げた状態の平面図であり、図６は後席用エアバッグ１が膨張した状態における図５のVI－VI線断面図を示している。図３，４は、図１のIII－III線、IV－IV線断面図である。 FIG. 5 is a plan view of a state in which the rear seat airbag 1 before being inflated is flattened, and FIG. 6 is a sectional view taken along line VI-VI in FIG. 5 in a state in which the rear seat airbag 1 is inflated. Yes. 3 and 4 are sectional views taken along lines III-III and IV-IV in FIG.
　フロントパネル３１とリアパネル３２とは、一方向に長い略々長方形状の基布よりなり、それらの周縁部が縫合糸３３によって縫合されている。 The front panel 31 and the rear panel 32 are made of a substantially rectangular base cloth that is long in one direction, and the peripheral portions thereof are stitched together by a suture thread 33.
　フロントパネル３１とリアパネル３２とは、次に説明する環状縫目４１～４９，５１～５６，７２～７５、直線状縫目６１～７１，７６，７７によっても縫合されている。 The front panel 31 and the rear panel 32 are also stitched by annular stitches 41 to 49, 51 to 56, 72 to 75 and linear stitches 61 to 71, 76, 77 described below.
　トップチャンバ１０と第１チャンバ１１との境界部には、複数個（この実施の形態では３個）の環状縫目４１，４２，４３が後席用エアバッグ１の幅方向に間隔をあけて設けられている。第１チャンバ１１と第２チャンバ１２との境界部１５には、複数個（この実施の形態では３個）の環状縫目４４，４５，４６が後席用エアバッグ１の幅方向に間隔をあけて設けられている。第２チャンバ１２と第３チャンバ１３との境界部１６には、複数個（この実施の形態では３個）の環状縫目４７，４８，４９が後席用エアバッグ１の幅方向に間隔をあけて設けられている。第３チャンバ１３の先端近傍には複数個（この実施の形態では、３個）の環状縫目５１，５２，５３が後席用エアバッグ１の幅方向に間隔をあけて設けられている。 At the boundary between the top chamber 10 and the first chamber 11, a plurality of (three in this embodiment) annular stitches 41, 42, 43 are spaced apart in the width direction of the rear seat airbag 1. Is provided. At the boundary 15 between the first chamber 11 and the second chamber 12, a plurality (three in this embodiment) of annular stitches 44, 45, 46 are spaced in the width direction of the rear seat airbag 1. Opened. At the boundary 16 between the second chamber 12 and the third chamber 13, a plurality of (three in this embodiment) annular stitches 47, 48, 49 are spaced apart in the width direction of the rear seat airbag 1. Opened. Near the tip of the third chamber 13, a plurality (three in this embodiment) of annular stitches 51, 52, 53 are provided at intervals in the width direction of the rear seat airbag 1.
　環状縫目４７，５１の間には環状縫目５４が設けられている。環状縫目４９，５３の間には環状縫目５６が設けられている。環状縫目４８に近接して、かつ環状縫目４８よりも環状縫目５２側に、環状縫目５５が設けられている。 An annular seam 54 is provided between the annular seams 47 and 51. An annular seam 56 is provided between the annular seams 49 and 53. An annular seam 55 is provided close to the annular seam 48 and closer to the annular seam 52 than the annular seam 48.
　環状縫目４１，４４，４７，５４，５１を順次に連結するように直線状縫目６１，６２，６３，６４が設けられている。環状縫目４２，４５，４８を順次に連結するように直線状縫目６５，６６が設けられ、環状縫目５５，５２を連結するように直線状縫目６７が設けられている。環状縫目４３，４６，４９，５６，５３を順次に連結するように直線状縫目６８，６９，７０，７１が設けられている。 Linear stitches 61, 62, 63, 64 are provided so as to sequentially connect the annular stitches 41, 44, 47, 54, 51. Linear stitches 65 and 66 are provided so as to sequentially connect the annular stitches 42, 45 and 48, and linear stitches 67 are provided so as to connect the annular stitches 55 and 52. Linear stitches 68, 69, 70, 71 are provided so as to sequentially connect the annular stitches 43, 46, 49, 56, 53.
　これらの直線状縫目６１～６４，６５～６７，６８～７１は互いに平行であり、後席用エアバッグ１の長手方向に延在している。 These straight seams 61 to 64, 65 to 67, and 68 to 71 are parallel to each other and extend in the longitudinal direction of the airbag 1 for the rear seat.
　トップチャンバ１０にあっては、第１チャンバ１１側に環状縫目７２，７３が後席用エアバッグ１の幅方向に間隔をあけて設けられている。また、トップチャンバ１０の前端近傍に環状縫目７４，７５が後席用エアバッグ１の幅方向に間隔をあけて設けられている。環状縫目７２，７４を連結するように直線状縫目７６が設けられている。環状縫目７３，７５を連結するように直線状縫目７７が設けられている。直線状縫目７６，７７は互いに平行であり、後席用エアバッグ１の長手方向に延在している。 In the top chamber 10, annular stitches 72 and 73 are provided on the first chamber 11 side at intervals in the width direction of the rear seat airbag 1. In addition, annular seams 74 and 75 are provided in the vicinity of the front end of the top chamber 10 at intervals in the width direction of the rear seat airbag 1. A straight seam 76 is provided so as to connect the annular seams 72 and 74. A straight seam 77 is provided so as to connect the annular seams 73 and 75. The straight seams 76 and 77 are parallel to each other and extend in the longitudinal direction of the rear seat airbag 1.
　直線状縫目７６，７７間にインフレータ１４が配置されている。この実施の形態では、インフレータ１４はシリンダ型であり、図３の通り、インフレータ１４の側面からはスタッドボルト１４ａが突設されている。スタッドボルト１４ａはリアパネル３２に設けられたボルト挿通孔を通って後席用エアバッグ１外に突出し、後席用エアバッグ装置のケースに固定される。インフレータ１４は、ガス噴出口が第１チャンバ１１側となるように配置されている。 The inflator 14 is disposed between the straight stitches 76 and 77. In this embodiment, the inflator 14 is a cylinder type, and a stud bolt 14a is projected from the side surface of the inflator 14 as shown in FIG. The stud bolt 14a protrudes out of the rear seat airbag 1 through a bolt insertion hole provided in the rear panel 32, and is fixed to the case of the rear seat airbag device. The inflator 14 is disposed so that the gas ejection port is on the first chamber 11 side.
　環状縫目４１～４９，５１～５６，７２～７５及び直線状縫目６１～７１，７６，７７によって後席用エアバッグ１の膨張厚みが規制される。 The inflation thickness of the rear seat airbag 1 is regulated by the annular stitches 41 to 49, 51 to 56, 72 to 75 and the straight stitches 61 to 71, 76, 77.
　環状縫目４１～４３を設けたことにより、ガス流路幅が環状縫目４１～４３部分、即ちトップチャンバ１０と第１チャンバ１１との連結部（境界部）１７で狭くなっており、後席用エアバッグ１の膨張時にこの部分で後席用エアバッグ１が屈曲し易いものとなっている。同様に、環状縫目４４～４６，４７～４９，５４，５５を設けたことにより、後席用エアバッグ１の膨張時に、第１チャンバ１１と第２チャンバ１２との連結部（境界部）１５、及び第２チャンバ１２と第３チャンバ１３との連結部（境界部）１６で、後席用エアバッグ１がそれぞれ屈曲し易いものとなっている。 By providing the annular seams 41 to 43, the gas flow path width is narrowed at the annular seams 41 to 43, that is, at the connecting portion (boundary portion) 17 between the top chamber 10 and the first chamber 11, and the rear When the seat airbag 1 is inflated, the rear seat airbag 1 is easily bent at this portion. Similarly, by providing the annular seams 44 to 46, 47 to 49, 54 and 55, when the rear seat airbag 1 is inflated, the connecting portion (boundary portion) between the first chamber 11 and the second chamber 12 is used. 15 and the connecting portion (boundary portion) 16 between the second chamber 12 and the third chamber 13 make the rear seat airbag 1 easily bent.
　前記第１及び第２テザー２１，２２の上端は、環状縫目７４，７５内に縫着されている。第１テザー２１の下端（後端）は図６の通り環状縫目４４，４６内に縫着されている。図６の符号２１ａはこの縫合糸を示している。第２テザー２２の下端は環状縫目５４，５６内に縫着されている。第３テザー２３の前端は環状縫目５１，５３内に縫着され、後端は環状縫目４７，４９内に縫着されている。 The upper ends of the first and second tethers 21 and 22 are sewn into the annular stitches 74 and 75. The lower end (rear end) of the first tether 21 is sewn into the annular stitches 44 and 46 as shown in FIG. Reference numeral 21a in FIG. 6 indicates this suture thread. The lower end of the second tether 22 is sewn into the annular stitches 54 and 56. The front end of the third tether 23 is sewn into the annular stitches 51 and 53, and the rear end is sewn into the annular stitches 47 and 49.
　このように構成された後席用エアバッグ１は、折り畳まれ、天井部４内に配置され、ルーフガーニッシュによって覆われている。 The rear-seat airbag 1 configured in this manner is folded, disposed in the ceiling portion 4, and covered with a roof garnish.
　車両衝突時には、インフレータ１４がガス噴出作動し、後席用エアバッグ１が膨張する。図１の通り、トップチャンバ１０は天井部４に沿って膨張し、第１チャンバ１１がトップチャンバ１０の後端から下方かつ後方へ斜めに膨張する。第２チャンバ１２は、第１チャンバ１１の下端から下方に向って膨張し、第３チャンバ１３は、第２チャンバ１２の下端から前方に向って、後席乗員Ｍの大腿部上面に沿って膨張する。第３チャンバ１３の前端は、前席２の後面に当接する。 In the event of a vehicle collision, the inflator 14 is insufflated and the rear seat airbag 1 is inflated. As shown in FIG. 1, the top chamber 10 expands along the ceiling portion 4, and the first chamber 11 expands obliquely downward and rearward from the rear end of the top chamber 10. The second chamber 12 expands downward from the lower end of the first chamber 11, and the third chamber 13 extends forward from the lower end of the second chamber 12 along the upper surface of the thigh of the rear seat occupant M. Inflate. The front end of the third chamber 13 contacts the rear surface of the front seat 2.
　第１テザー２１により第１チャンバ１１と第２チャンバ１２との連結部１５が前方かつ上方へ引っ張られることにより、第１チャンバ１１及び第２チャンバ１２は後席乗員Ｍの前面に沿う位置に膨張する。この際、第１チャンバ１１は上方ほど前方となるように傾斜状態となり、第２チャンバ１２はほぼ鉛直下方ないしは下方ほど前方となるように僅かに傾斜する。第１チャンバ１１と第２チャンバ１２との連結部１５は、乗員Ｍの頭部よりも下位に位置する。 When the connecting portion 15 between the first chamber 11 and the second chamber 12 is pulled forward and upward by the first tether 21, the first chamber 11 and the second chamber 12 expand to a position along the front surface of the rear seat occupant M. To do. At this time, the first chamber 11 is inclined so as to be forward as it goes upward, and the second chamber 12 is slightly inclined so as to be forward as it is substantially vertically downward or downward. The connecting portion 15 between the first chamber 11 and the second chamber 12 is positioned lower than the head of the occupant M.
　後席乗員Ｍの胸部～腹部はこのように膨張した第２チャンバ１２によって拘束され、頭部は第１チャンバ１１によって拘束される。第１チャンバ１１は頭部の前方に広く略平面状に展開し、第２チャンバ１２は胸部ないし胴部の前方に広く略平面状に展開するので、乗員Ｍを受け止める受承面積が大きい。 The chest-abdomen of the rear seat occupant M is restrained by the inflated second chamber 12 and the head is restrained by the first chamber 11. Since the first chamber 11 is wide and substantially flat in front of the head, and the second chamber 12 is wide and substantially flat in front of the chest or torso, the receiving area for receiving the occupant M is large.
　このように膨張した後席用エアバッグ１の第３チャンバ１３の前端が前席２の後面に当接することにより、第１チャンバ１１及び第２チャンバ１２の前方移動が抑制される。 The front end of the third chamber 13 of the rear seat airbag 1 inflated in this way comes into contact with the rear surface of the front seat 2 so that the forward movement of the first chamber 11 and the second chamber 12 is suppressed.
　この実施の形態では、図１の通り、第３チャンバ１３の前端が第３チャンバ１３の前後方向の途中部分（第２テザー２２の連結部分）よりも上位となるように第３テザー２３の長さが設定されている。そのため、前席２の位置がシートアジャスタの最前部に位置していても、またシートアジャスタの最後部に位置していても、第３チャンバ１３の前端が前席２の後面に当接し易い。 In this embodiment, as shown in FIG. 1, the length of the third tether 23 is such that the front end of the third chamber 13 is higher than the middle part of the third chamber 13 in the front-rear direction (the connecting portion of the second tether 22). Is set. Therefore, even if the position of the front seat 2 is located at the foremost part of the seat adjuster or the rearmost part of the seat adjuster, the front end of the third chamber 13 tends to come into contact with the rear surface of the front seat 2.
　図１～６の後席用エアバッグ１は、膨張時に各チャンバ１０，１１，１２，１３同士の連結部で屈曲するように構成されているが、図７の後席用エアバッグ１’のように、膨張時に屈曲せず、側面視形状がＣ字形に湾曲するものであってもよい。図７のその他の符号は図１と同一部分を示している。 The rear seat airbag 1 shown in FIGS. 1 to 6 is configured to bend at the connecting portion between the chambers 10, 11, 12, and 13 when inflated. The rear seat airbag 1 ′ shown in FIG. As described above, the side view shape may be curved in a C shape without being bent at the time of expansion. 7 denote the same parts as those in FIG.
　上記実施の形態は本発明の一例であり、本発明は図示以外の構成とされてもよい。例えば、後席用エアバッグ１，１’には第３テザー２３が設けられているが、第３テザー２３は省略されてもよい。また、トップチャンバ１０が省略され、インフレータ１４の噴出ガスが直接的に第１チャンバ１１内に導入されるよう構成されてもよい。第１及び第２テザー２１，２２の上端は、後席用エアバッグよりも前方の車両部材、例えば後席用エアバッグ装置のケース等に連結されてもよい。 The above embodiment is an example of the present invention, and the present invention may have a configuration other than that illustrated. For example, the third tether 23 is provided in the rear seat airbag 1, 1 ′, but the third tether 23 may be omitted. Further, the top chamber 10 may be omitted, and the gas ejected from the inflator 14 may be directly introduced into the first chamber 11. The upper ends of the first and second tethers 21 and 22 may be connected to a vehicle member ahead of the rear seat airbag, for example, a case of a rear seat airbag device.
　本発明では、第１チャンバ１１及び第２チャンバ１２の少なくとも一方の後面の左右方向の中央が左右両サイドに比べて車両前方に凹む構成とされてもよい。この第１チャンバ又は第２チャンバにあっては、斜め衝突又はオフセット衝突に際して後席乗員が第１チャンバ又は第２チャンバの後面の左半側又は右半側に対し略垂直に受け止められる。 In the present invention, the center in the left-right direction of the rear surface of at least one of the first chamber 11 and the second chamber 12 may be recessed forward of the vehicle as compared to the left and right sides. In the first chamber or the second chamber, the rear seat occupant is received substantially perpendicularly to the left half side or the right half side of the rear surface of the first chamber or the second chamber in the case of an oblique collision or an offset collision.
　［第２の実施形態］
　図８，９は本発明の第２の実施形態に係る後席用エアバッグ１０１を示す。この後席用エアバッグ１０１は、自動車の前席１０２と後席１０３との間の車両の天井部１０４から下方ないし下方かつ後方に膨張して後席１０３の乗員Ｍを拘束するためのものである。 [Second Embodiment]
8 and 9 show a rear seat airbag 101 according to a second embodiment of the present invention. The rear seat airbag 101 is inflated downward or downward and rearward from the vehicle ceiling 104 between the front seat 102 and the rear seat 103 of the automobile to restrain the occupant M of the rear seat 103. is there.
　この後席用エアバッグ１０１は、天井部１０４から下方かつ後方に向って膨張する第１チャンバ１１１と、該第１チャンバ１１１の下部に連なり、前方に向って膨張する第２チャンバ１１２とを有する。 The rear seat airbag 101 includes a first chamber 111 that expands downward and rearward from the ceiling 104, and a second chamber 112 that is connected to the lower portion of the first chamber 111 and expands forward. .
　この実施の形態では、後席用エアバッグ１０１は天井部１０４に沿って膨張するトップチャンバ１１０をさらに有する。このトップチャンバ１１０の後部に第１チャンバ１１１の上部が連なっている。トップチャンバ１１０内にインフレータ１１４が設置されており、該インフレータ１１４からのガスによって後席用エアバッグ１０１が膨張する。トップチャンバ１１０は、車両前後方向に少なくとも２ヶ所で天井部１０４に取り付けて固定されている。 In this embodiment, the rear seat airbag 101 further includes a top chamber 110 that expands along the ceiling 104. The upper part of the first chamber 111 is connected to the rear part of the top chamber 110. An inflator 114 is installed in the top chamber 110, and the rear seat airbag 101 is inflated by the gas from the inflator 114. The top chamber 110 is attached and fixed to the ceiling 104 at at least two places in the vehicle front-rear direction.
　この後席用エアバッグ１０１は、トップチャンバ１１０の前部と、後席用エアバッグ１０１の所定部分とを連結する第１及び第２テザー１２１，１２２を備えている。 The rear seat airbag 101 includes first and second tethers 121 and 122 that connect the front portion of the top chamber 110 and a predetermined portion of the rear seat airbag 101.
　第１テザー１２１は第１チャンバ１１１の前方側に配置され、第２テザー１２２は第１チャンバ１１１の前方側かつ第２チャンバ１１２の上方側に配置されている。各テザー１２１，１２２の上端はトップチャンバ１１０の前部に縫着されている。第１テザー１２１の下端（後端）は、第１チャンバ１１１と第２チャンバ１１２との連結部（境界部）１１５又はその周辺部に縫着されている。第２テザー１２２の下端は、第２チャンバ１１２の前部に縫着されている。 The first tether 121 is disposed on the front side of the first chamber 111, and the second tether 122 is disposed on the front side of the first chamber 111 and on the upper side of the second chamber 112. The upper ends of the tethers 121 and 122 are sewn to the front portion of the top chamber 110. The lower end (rear end) of the first tether 121 is sewn to the connecting portion (boundary portion) 115 between the first chamber 111 and the second chamber 112 or its peripheral portion. The lower end of the second tether 122 is sewn to the front portion of the second chamber 112.
　この後席用エアバッグ１０１は、上記第１の実施形態による後席用エアバッグ１と同様に、フロントパネルとリアパネルとを縫合することにより製作されたものである。第１及び第２テザー１２１，１２２の縫着方法は上記第１の実施形態と同様である。また、後席用エアバッグ１０１の膨張時に、第１チャンバ１１１と第２チャンバ１１２との連結部（境界部）１１５で後席用エアバッグ１が屈曲し易くなるように、環状縫目が設けられ、ガス流路幅が狭くなっている。同様に、トップチャンバ１１０と第１チャンバ１１１との連結部（境界部）１１７で後席用エアバッグ１が屈曲し易くなるように、環状縫目が設けられ、ガス流路幅が狭くなっている。 The rear seat airbag 101 is manufactured by stitching the front panel and the rear panel in the same manner as the rear seat airbag 1 according to the first embodiment. The sewing method of the first and second tethers 121 and 122 is the same as that in the first embodiment. Further, when the rear seat airbag 101 is inflated, an annular seam is provided so that the rear seat airbag 1 is easily bent at the connecting portion (boundary portion) 115 between the first chamber 111 and the second chamber 112. The gas flow path width is narrow. Similarly, an annular seam is provided so that the rear seat airbag 1 is easily bent at the connecting portion (boundary portion) 117 between the top chamber 110 and the first chamber 111, and the gas flow path width is reduced. Yes.
　このように構成された後席用エアバッグ１０１は、折り畳まれ、天井部１０４内に配置され、ルーフガーニッシュによって覆われている。 The rear-seat airbag 101 configured in this manner is folded, disposed in the ceiling portion 104, and covered with a roof garnish.
　車両衝突時には、インフレータ１１４がガス噴出作動し、後席用エアバッグ１０１が膨張する。図８，９の通り、トップチャンバ１１０は天井部１０４に沿って膨張し、第１チャンバ１１１がトップチャンバ１１０の後端から下方かつ後方へ斜めに膨張する。第２チャンバ１１２は、第１チャンバ１１１の下端から前方に向かって、後席乗員Ｍの大腿部の上方で膨張する。第２チャンバ１１２の前端は、前席１０２の後面に当接する。後席用エアバッグ１０１の膨張時、第１テザー１２１及び第２テザー１２２は、天井部１０４（トップチャンバ１１０の前部）から、下方（下方かつ前方や下方かつ後方）へ放射状に展開してぴんと張る。 In the event of a vehicle collision, the inflator 114 is operated to eject gas, and the rear seat airbag 101 is inflated. As shown in FIGS. 8 and 9, the top chamber 110 expands along the ceiling 104, and the first chamber 111 expands obliquely downward and rearward from the rear end of the top chamber 110. The second chamber 112 expands above the thigh of the rear seat occupant M from the lower end of the first chamber 111 toward the front. The front end of the second chamber 112 contacts the rear surface of the front seat 102. When the rear seat airbag 101 is inflated, the first tether 121 and the second tether 122 expand radially from the ceiling 104 (the front of the top chamber 110) downward (downward, forward, downward, and backward). Tighten.
　第１テザー１２１により第１チャンバ１１１と第２チャンバ１１２との連結部１１５が前方かつ上方へ引っ張られ、第２テザー１２２により第２チャンバ１１２の前部が上方へ引っ張られることにより、第１チャンバ１１１及び第２チャンバ１１２は後席乗員Ｍの前方で膨張する。この際、第１チャンバ１１１は上方ほど前方となるように傾斜状態となり、第２チャンバ１１２はほぼ水平ないしは前方ほど下方となるように僅かに傾斜する。第１チャンバ１１１と第２チャンバ１１２との連結部１１５は、乗員Ｍの頭部よりも下位に位置する。 The first tether 121 pulls the connecting portion 115 between the first chamber 111 and the second chamber 112 forward and upward, and the second tether 122 pulls the front portion of the second chamber 112 upward, whereby the first chamber 111 and the second chamber 112 expand in front of the rear seat occupant M. At this time, the first chamber 111 is inclined so as to be forward in the upward direction, and the second chamber 112 is slightly inclined so as to be substantially horizontal or downward in the forward direction. The connecting portion 115 between the first chamber 111 and the second chamber 112 is positioned lower than the head of the occupant M.
　席乗員Ｍの頭部は第１チャンバ１１１によって拘束される。膨張した後席用エアバッグ１０１の第２チャンバ１１２の前端が前席１０２の後面に当接することにより、第１チャンバ１１１及び第２チャンバ１１２の前方移動が抑制される。 The head of the seat occupant M is restrained by the first chamber 111. When the front end of the second chamber 112 of the inflated rear seat airbag 101 contacts the rear surface of the front seat 102, the forward movement of the first chamber 111 and the second chamber 112 is suppressed.
　膨張した後席用エアバッグ１０１の側面視で、トップチャンバ１１０、第１チャンバ１１１、第２チャンバ１１２及びテザー１２２で囲まれる領域内に、テザー１２１，１２２以外の追加テザーをさらに設けてもよい。追加テザーは、テザー１２１，１２２と共に天井部１０４から下方へ放射状に展開するように設けることが好ましい。テザー１２１，１２２の上端が縫着される箇所は同じでもよいし、異なっていてもよい。 Additional tethers other than the tethers 121 and 122 may be further provided in a region surrounded by the top chamber 110, the first chamber 111, the second chamber 112, and the tether 122 in a side view of the inflated rear seat airbag 101. . The additional tethers are preferably provided so as to expand radially downward from the ceiling 104 together with the tethers 121 and 122. The locations where the upper ends of the tethers 121 and 122 are sewn may be the same or different.
　図１０に示すように、トップチャンバ１１０と第１チャンバ１１１との間に第３チャンバ１１３を追加してもよい。第３チャンバ１１３は天井部１０４から下方ないし下方かつ後方に膨張するものであり、第３チャンバ１１３の上部はトップチャンバ１１０の後部に連なり、第３チャンバ１１３の下部は第１チャンバ１１１の上部に連なる。 As shown in FIG. 10, a third chamber 113 may be added between the top chamber 110 and the first chamber 111. The third chamber 113 expands downward or downward and rearward from the ceiling portion 104, the upper portion of the third chamber 113 is connected to the rear portion of the top chamber 110, and the lower portion of the third chamber 113 is connected to the upper portion of the first chamber 111. It will be a series.
　この場合、第３チャンバ１１３と第１チャンバ１１１との連結部（境界部）１１８と、トップチャンバ１１０の前部とを連結する第３テザー１２３を設けることが好ましい。第３チャンバ１１３及び第３テザー１２３を設けることで、乗員頭部拘束面となる第１チャンバ１１１の傾斜角度θ（第１チャンバ１１１の後面と水平面との交角）を容易に調整することができる。傾斜角度θは２５°～６５°特に４０°～５０°程度が好ましい。 In this case, it is preferable to provide a third tether 123 that connects the connecting portion (boundary portion) 118 between the third chamber 113 and the first chamber 111 and the front portion of the top chamber 110. By providing the third chamber 113 and the third tether 123, it is possible to easily adjust the inclination angle θ of the first chamber 111 serving as an occupant head restraint surface (intersection angle between the rear surface of the first chamber 111 and the horizontal plane). . The inclination angle θ is preferably about 25 ° to 65 °, particularly about 40 ° to 50 °.
　上記第１及び第２の実施形態による後席用エアバッグ１、１０１は、略々長方形状の基布よりなるフロントパネルとリアパネルとの周縁部を縫合し、各チャンバの連結部（境界部）に環状縫目を設けて膨張時に屈曲し易くしたものであったが、図１１に示すように、各チャンバを異なるパネルで構成し、連通孔Ｈの周縁を縫合して連結して、チャンバの内部同士を連通するようにしてもよい。 The rear seat airbags 1 and 101 according to the first and second embodiments sew the peripheral portions of the front panel and the rear panel made of a substantially rectangular base fabric, and connect portions (boundary portions) of the respective chambers. However, as shown in FIG. 11, each chamber is composed of different panels, and the peripheral edges of the communication holes H are sewn and connected to each other. You may make it communicate inside.
　図１２に示すように、上記第２の実施形態に係る後席用エアバッグ１０１の第２チャンバ１１２の左右両側部を省略し、第２チャンバ１１２全体の左右幅を第１チャンバ１１１の左右幅より小さくしてもよい。すなわち、第１チャンバ（上部チャンバ）１１１の左端及び右端が、第２チャンバ（下部チャンバ）１１２の左端及び右端よりも左右両側に張り出すようにしてもよい。例えば、第２チャンバ１１２の左右幅を後席乗員Ｍの肩幅より小さくする。 As shown in FIG. 12, the left and right side portions of the second chamber 112 of the rear seat airbag 101 according to the second embodiment are omitted, and the left and right width of the entire second chamber 112 is set to the left and right width of the first chamber 111. It may be smaller. In other words, the left end and the right end of the first chamber (upper chamber) 111 may protrude to the left and right sides of the left end and the right end of the second chamber (lower chamber) 112. For example, the lateral width of the second chamber 112 is made smaller than the shoulder width of the rear seat occupant M.
　これにより、図１３に示すように、車両衝突時に後席乗員Ｍの腕Ａが上方へ移動しても、腕Ａが後席用エアバッグ１０１に接触しないか、又は接触しても後席用エアバッグ１０１をほとんど押し上げることがない。第１チャンバ１１１の左右幅は、第２チャンバ１１２の左右幅よりも大きく、乗員受承面積が大きいものであり、乗員頭部を拘束する。 As a result, as shown in FIG. 13, even if the arm A of the rear seat occupant M moves upward at the time of a vehicle collision, the arm A does not contact the rear seat airbag 101 or the rear seat The airbag 101 is hardly pushed up. The left-right width of the first chamber 111 is larger than the left-right width of the second chamber 112 and has a larger occupant receiving area, and restrains the occupant head.
　同様に、図１４に示すように、上記第１の実施形態に係る後席用エアバッグ１の第２チャンバ１２及び第３チャンバ１３からなる下部チャンバの左右幅を、第１チャンバ１１からなる上部チャンバの左右幅より小さくしてもよい。 Similarly, as shown in FIG. 14, the left and right widths of the lower chamber composed of the second chamber 12 and the third chamber 13 of the rear seat airbag 1 according to the first embodiment are set to the upper portion composed of the first chamber 11. You may make it smaller than the left-right width of a chamber.
　図１５に示すように、第３チャンバ１１３とトップチャンバ１１０との連結部と、第２チャンバ１１２の前後方向の途中部分（例えば第２チャンバ１１２の前後方向の中間付近）とを連結する第４テザー１２４をさらに設けてもよい。第１テザー１２１、第２テザー１２２及び第３テザー１２３の上端（前端）は、トップチャンバ１１０よりも前方の天井部１０４、例えば車体メンバやエアバッグのケースに連結されていてもよい。 As shown in FIG. 15, the fourth portion that connects the connecting portion between the third chamber 113 and the top chamber 110 and the middle portion of the second chamber 112 in the front-rear direction (for example, the vicinity of the middle of the second chamber 112 in the front-rear direction). A tether 124 may be further provided. The upper ends (front ends) of the first tether 121, the second tether 122, and the third tether 123 may be coupled to the ceiling portion 104 in front of the top chamber 110, for example, a vehicle body member or an airbag case.
　第４テザー１２４を設けることで、第２チャンバ１１２は、前後方向の中間部が下方へ屈曲せず、ほぼ真っ直ぐに膨張展開する。 By providing the fourth tether 124, the middle portion in the front-rear direction does not bend downward in the second chamber 112 and expands and expands almost straight.
　図１６に示すように、第４テザー１２４の上端を、第１テザー１２１、第２テザー１２２及び第３テザー１２３の上端と同一箇所に連結し、４本のテザーが天井部１０４から下方へ放射状にのびるようにしてもよい。 As shown in FIG. 16, the upper end of the fourth tether 124 is connected to the same location as the upper ends of the first tether 121, the second tether 122, and the third tether 123, and the four tethers radiate downward from the ceiling portion 104. You may make it extend.
　［第３の実施形態］
　図１７～１９は本発明の第３の実施形態に係る後席用エアバッグ２０１を示す。この後席用エアバッグ２０１は、自動車の前席２０２と後席２０３との間の車両の天井部２０４から下方ないし下方かつ後方に膨張して後席２０３の乗員Ｍを拘束するためのものである。 [Third Embodiment]
17 to 19 show a rear seat airbag 201 according to a third embodiment of the present invention. The rear-seat airbag 201 is inflated downward or downward and rearward from the vehicle ceiling 204 between the front seat 202 and the rear seat 203 of the automobile to restrain the occupant M of the rear seat 203. is there.
　この後席用エアバッグ２０１は、天井部２０４から下方かつ後方に向って膨張する第１チャンバ２１１と、該第１チャンバ２１１の下部に連なり、前方に向って膨張する第２チャンバ２１２とを有する。 The rear seat airbag 201 includes a first chamber 211 that expands downward and rearward from the ceiling portion 204, and a second chamber 212 that continues to the lower portion of the first chamber 211 and expands forward. .
　後席用エアバッグ２０１は天井部２０４に沿って膨張するトップチャンバ２１０をさらに有する。このトップチャンバ２１０の後部に第１チャンバ２１１の上部が連なっている。トップチャンバ２１０内にインフレータ２１４が設置されており、該インフレータ２１４からのガスによって後席用エアバッグ２０１が膨張する。トップチャンバ２１０は、車両前後方向に少なくとも２ヶ所で天井部２０４に取り付けて固定されている。 The rear seat airbag 201 further includes a top chamber 210 that inflates along the ceiling portion 204. The upper portion of the first chamber 211 is connected to the rear portion of the top chamber 210. An inflator 214 is installed in the top chamber 210, and the rear seat airbag 201 is inflated by the gas from the inflator 214. The top chamber 210 is attached and fixed to the ceiling portion 204 at at least two locations in the vehicle longitudinal direction.
　後席用エアバッグ２０１は、トップチャンバ２１０よりも前方の天井部２０４と、後席用エアバッグ２０１の所定部分とを連結する第１テザー２２１、第２テザー２２２、第３テザー２２３を備えている。図１８では各テザー２２１、２２２、２２３の図示を省略している。 The rear seat airbag 201 includes a first tether 221, a second tether 222, and a third tether 223 that connect the ceiling portion 204 ahead of the top chamber 210 and a predetermined portion of the rear seat airbag 201. Yes. In FIG. 18, illustration of the tethers 221, 222, and 223 is omitted.
　各テザー２２１、２２２、２２３の上端はトップチャンバ２１０よりも前方の天井部２０４、例えば車体メンバやエアバッグのケースに連結されている。第１テザー２２１の下端（後端）は、第１チャンバ２１１と第２チャンバ２１２との連結部（境界部）２１５又はその周辺部に縫着されている。第２テザー２２２の下端は、第２チャンバ２１２の前部（前端部）に縫着されている。第３テザー２２３の下端（後端）は、第１チャンバ２１１とトップチャンバ２１０との連結部（境界部）２１７又はその周辺部に縫着されている The upper ends of the tethers 221, 222, and 223 are connected to a ceiling portion 204 in front of the top chamber 210, for example, a vehicle body member or an airbag case. The lower end (rear end) of the first tether 221 is sewn to the connecting portion (boundary portion) 215 between the first chamber 211 and the second chamber 212 or its peripheral portion. The lower end of the second tether 222 is sewn to the front portion (front end portion) of the second chamber 212. The lower end (rear end) of the third tether 223 is sewn to the connecting portion (boundary portion) 217 between the first chamber 211 and the top chamber 210 or its peripheral portion.
　第１チャンバ２１１の後面の左右方向の中央、かつ上下方向の中央又は中央よりもやや上側には、左右両サイドに比べて車両前方に凹む凹部２８１が設けられている。 A recess 281 that is recessed toward the front of the vehicle compared to the left and right sides is provided at the center in the left-right direction on the rear surface of the first chamber 211 and slightly above the center in the up-down direction.
　第１チャンバ２１１の後面の下部かつ左右方向の中央には、左右両サイドに比べて車両後方に凸状に盛り上がって突出した凸部２８２が設けられている。 A convex portion 282 is provided at the lower portion of the rear surface of the first chamber 211 and at the center in the left-right direction so as to protrude and protrude in the rear of the vehicle in comparison with the left and right sides.
　図１９は、膨張前の後席用エアバッグ２０１を平たく広げた状態の平面図である。後席用エアバッグ２０１は、フロントパネル２３１とリアパネル（図示略）とを縫合することにより製作されたものである。 FIG. 19 is a plan view showing a state in which the rear seat airbag 201 before being inflated is flattened. The rear seat airbag 201 is manufactured by stitching a front panel 231 and a rear panel (not shown).
　フロントパネル２３１とリアパネルとは、一方向に長い略々長方形状の基布よりなり、それらの周縁部が縫目２６８によって縫合されている。 The front panel 231 and the rear panel are made of a substantially rectangular base cloth that is long in one direction, and their peripheral edges are stitched together by stitches 268.
　フロントパネル２３１とリアパネルとは、次に説明する環状縫目２４１～２４８、直線状縫目２６１～２６７によっても縫合されている。 The front panel 231 and the rear panel are also stitched by annular stitches 241 to 248 and linear stitches 261 to 267 which will be described below.
　トップチャンバ２１０と第１チャンバ２１１との境界部２１７には、複数個（この実施の形態では３個）の環状縫目２４１，２４２，２４３が後席用エアバッグ２０１の幅方向に間隔をあけて設けられている。 A plurality of (three in this embodiment) annular stitches 241, 242, and 243 are spaced apart in the width direction of the rear seat airbag 201 at the boundary 217 between the top chamber 210 and the first chamber 211. Is provided.
　第１チャンバ２１１と第２チャンバ２１２との境界部２１５には、複数個（この実施の形態では３個）の環状縫目２４４、２４５、２４６が後席用エアバッグ２０１の幅方向に間隔をあけて設けられている。 At the boundary 215 between the first chamber 211 and the second chamber 212, a plurality (three in this embodiment) of annular stitches 244, 245, 246 are spaced apart in the width direction of the rear seat airbag 201. Opened.
　環状縫目２４２と環状縫目２４５との間には、環状縫目２４７及び２４８が間隔を空けて設けられている。フロントパネル２３１及びリアパネルには、環状縫目２４７の内側に、後席用エアバッグ２０１の長手方向に延在するスリットＳが形成されている。 Between the annular seam 242 and the annular seam 245, annular seams 247 and 248 are provided at an interval. In the front panel 231 and the rear panel, a slit S extending in the longitudinal direction of the rear seat airbag 201 is formed inside the annular seam 247.
　環状縫目２４１と環状縫目２４４とを連結するように直線状縫目２６１が設けられている。環状縫目２４４と後席用エアバッグ２０１の前端側の縫目２６８とを連結するように、後席用エアバッグ２０１の長手方向に延在する直線状縫目２６２が設けられている。 A linear stitch 261 is provided so as to connect the annular stitch 241 and the annular stitch 244. A straight stitch 262 extending in the longitudinal direction of the rear seat airbag 201 is provided so as to connect the annular stitch 244 and the stitch 268 on the front end side of the rear seat airbag 201.
　環状縫目２４３と環状縫目２４６とを連結するように直線状縫目２６６が設けられている。環状縫目２４６と後席用エアバッグ２０１の前端側の縫目２６８とを連結するように、後席用エアバッグ２０１の長手方向に延在する直線状縫目２６７が設けられている。 A linear stitch 266 is provided so as to connect the annular stitch 243 and the annular stitch 246. A straight stitch 267 extending in the longitudinal direction of the rear seat airbag 201 is provided so as to connect the annular stitch 246 and the stitch 268 on the front end side of the rear seat airbag 201.
　後席用エアバッグ２０１の幅方向の中央部では、環状縫目２４２、２４７、２４８を順次に連結するように直線状縫目２６３、２６４が設けられている。また、環状縫目２４８と後席用エアバッグ２０１の前端側の縫目２６８とを連結するように、後席用エアバッグ２０１の長手方向に延在する直線状縫目２６５が設けられている。 At the center in the width direction of the rear seat airbag 201, linear seams 263, 264 are provided so as to sequentially connect the annular seams 242, 247, 248. In addition, a straight seam 265 extending in the longitudinal direction of the rear seat airbag 201 is provided so as to connect the annular stitch 248 and the stitch 268 on the front end side of the rear seat airbag 201. .
　環状縫目２４５と環状縫目２４８との間には縫目は設けられていない。環状縫目２４４、２４５、２４６、２４８に囲まれた領域が、後席用エアバッグ２０１の膨張時に上述の凸部２８２となる。スリットＳの形成箇所が、後席用エアバッグ２０１の膨張時に上述の凹部２８１となる。 No seam is provided between the annular seam 245 and the annular seam 248. A region surrounded by the annular stitches 244, 245, 246, and 248 becomes the above-described convex portion 282 when the rear seat airbag 201 is inflated. The portion where the slit S is formed becomes the above-described recess 281 when the rear seat airbag 201 is inflated.
　トップチャンバ２１０の長手方向端部は、幅が狭くなっており、インフレータ２１４が配備されるインフレータ配備室２８４となっている。本実施形態では、インフレータ２１４はシリンダ型である。インフレータ２１４は、ガス噴出口が後方側となるように配置されている。 The end of the top chamber 210 in the longitudinal direction has a narrow width and is an inflator deployment chamber 284 in which the inflator 214 is deployed. In the present embodiment, the inflator 214 is a cylinder type. The inflator 214 is disposed so that the gas ejection port is on the rear side.
　環状縫目２４１、２４２、２４３の内側に、第３テザー２２３の下端（後端）が縫着される。環状縫目２４４、２４５、２４６の内側に、第１テザー２２１の下端（後端）が縫着される。フロントパネル２３１の前端部に、第２テザー２２２の下端が縫着される。 The lower end (rear end) of the third tether 223 is sewn inside the annular stitches 241, 242, and 243. The lower end (rear end) of the first tether 221 is sewn inside the annular stitches 244, 245, and 246. The lower end of the second tether 222 is sewn to the front end portion of the front panel 231.
　このように構成された後席用エアバッグ２０１は、折り畳まれ、天井部２０４内に配置され、ルーフガーニッシュによって覆われている。 The rear seat airbag 201 configured in this manner is folded, placed in the ceiling portion 204, and covered with a roof garnish.
　車両衝突時には、インフレータ２１４がガス噴出作動し、後席用エアバッグ２０１が膨張する。図１７の通り、トップチャンバ２１０は天井部２０４に沿って膨張し、第１チャンバ２１１がトップチャンバ１０の後端から下方かつ後方へ斜めに膨張する。第２チャンバ２１２は、第１チャンバ２１１の下端から前方に向かって膨張する。 In the event of a vehicle collision, the inflator 214 operates to inject gas, and the rear seat airbag 201 is inflated. As shown in FIG. 17, the top chamber 210 expands along the ceiling portion 204, and the first chamber 211 expands obliquely downward and rearward from the rear end of the top chamber 10. The second chamber 212 expands from the lower end of the first chamber 211 toward the front.
　膨張完了状態では、第１チャンバ２１１は乗員Ｍの上半身の前方に広く展開する。第１チャンバ２１１の後面の下部かつ左右方向の中央に形成される凸部２８２により、乗員Ｍの顎部が拘束される。また、第１チャンバ２１１の後面、かつ凸部２８２よりも上側に形成される凹部２８１により、乗員Ｍの額部が拘束される。 In the inflated state, the first chamber 211 is widely deployed in front of the upper body of the occupant M. The jaw portion of the occupant M is restrained by a convex portion 282 formed at the lower portion of the rear surface of the first chamber 211 and at the center in the left-right direction. In addition, the forehead portion of the occupant M is restrained by the concave portion 281 formed on the rear surface of the first chamber 211 and above the convex portion 282.
　後席用エアバッグ２０１は、スリットＳにより凹部２８１を形成していたが、環状縫目２４７内に円形開口を設け、膨張完了時に凹部２８１を形成するようにしてもよい。 In the rear seat airbag 201, the recess 281 is formed by the slit S, but a circular opening may be provided in the annular seam 247 to form the recess 281 when the inflation is completed.
　上記実施形態では、後席用エアバッグ１、１０１、２０１について説明したが、乗員の前方に膨張するように構成されていればよく、運転席、助手席、その他の座席にも適用できる。 In the above embodiment, the rear seat airbags 1, 101, 201 have been described. However, the rear seat airbags 1, 101, 201 may be configured to be inflated in front of the occupant, and can be applied to a driver seat, a passenger seat, and other seats.
　本出願は、２０１６年７月１２日付で出願された日本特許出願２０１６－１３７６９３、２０１６年８月２９日付で出願された日本特許出願２０１６－１６６９４９及び２０１６年１２月９日付で出願された日本特許出願２０１６－２３９７２２に基づいており、その全体が引用により援用される。 This application is based on Japanese Patent Application 2016-1377693 filed on July 12, 2016, Japanese Patent Application 2016-166949 filed on August 29, 2016, and Japanese Patent Application filed on December 9, 2016. Based on application 2016-239722, which is incorporated by reference in its entirety.
　１，１’，１０１、２０１　後席用エアバッグ
　２，１０２、２０２　前席
　３，１０３、２０３　後席
　４，１０４、２０４　天井部
　１０，１１０、２１０　トップチャンバ
　１１，１１１、２１１　第１チャンバ
　１２，１１２、２１２　第２チャンバ
　１３，１１３、２１３　第３チャンバ
　２１，１２１、２２１　第１テザー
　２２，１２２、２２２　第２テザー
　２３，１２３、２２３　第３テザー
　３１、２３１　フロントパネル
　３２　リアパネル
　４１～５６，７２～７５、２４１～２４８　環状縫目
　６１～７１，７６，７７、２６１～２６７　直線状縫目
２８１　凹部
２８２　凸部 1, 1 ', 101, 201 Rear seat airbag 2, 102, 202 Front seat 3, 103, 203 Rear seat 4, 104, 204 Ceiling 10, 110, 210 Top chamber 11, 111, 211 First chamber 12 , 112, 212 Second chamber 13, 113, 213 Third chamber 21, 121, 221 First tether 22, 122, 222 Second tether 23, 123, 223 Third tether 31, 231, Front panel 32 Rear panel 41-56 72 to 75, 241 to 248 Annular stitch 61 to 71, 76, 77, 261 to 267 Straight stitch 281 Concave portion 282 Convex portion

Claims (26)

  1. 　インフレータからのガスによって座席に着席した乗員の前方に膨張するエアバッグにおいて、
    　車室天井部から下方かつ後方に向って膨張する第１チャンバと、
    　該第１チャンバの下部に連なり、前方に向って膨張する第２チャンバと、
    を有することを特徴とするエアバッグ。     In the airbag that inflates forward of the occupant seated in the seat by the gas from the inflator,
    A first chamber that expands downward and rearward from the passenger compartment ceiling;
    A second chamber that continues to the lower portion of the first chamber and expands forward;
    An airbag characterized by comprising:
  2. 　請求項１において、前記エアバッグが膨張した状態で、前記第１チャンバと前記第２チャンバとの連結部が該エアバッグの折れ点となることを特徴とするエアバッグ。 2. The airbag according to claim 1, wherein a connecting portion between the first chamber and the second chamber becomes a break point of the airbag when the airbag is inflated.
  3. 　請求項１又は２において、前記第１チャンバと前記第２チャンバとの連結部又はその周辺部と、該第１チャンバよりも前方部分との間に架け渡された第１テザーを有することを特徴とするエアバッグ。 3. The method according to claim 1, further comprising a first tether spanned between a connecting portion of the first chamber and the second chamber or a peripheral portion thereof, and a front portion of the first chamber. Airbag.
  4. 　請求項１から３までのいずれか１項において、前記第２チャンバと、前記第１チャンバよりも前方部分との間に架け渡された第２テザーを有することを特徴とするエアバッグ。 The airbag according to any one of claims 1 to 3, further comprising a second tether bridged between the second chamber and a front portion of the first chamber.
  5. 　請求項１又は２において、
    　前記第１チャンバと前記第２チャンバとの連結部又はその周辺部と、該第１チャンバよりも前方部分との間に架け渡された第１テザーと、
    　該第２チャンバと、該第１チャンバよりも前方部分との間に架け渡された第２テザーと、
    　車室天井に沿って膨張するトップチャンバと、
    　をさらに備え、
    　該第１チャンバは該トップチャンバの後部に連なっており、
    　該第１テザー及び該第２テザーの上端は該トップチャンバの前部に連なっていることを特徴とするエアバッグ。     In claim 1 or 2,
    A first tether bridged between a connecting portion of the first chamber and the second chamber or a peripheral portion thereof, and a front portion of the first chamber;
    A second tether spanned between the second chamber and a front portion of the first chamber;
    A top chamber that expands along the ceiling of the passenger compartment;
    Further comprising
    The first chamber is connected to the rear of the top chamber;
    The airbag according to claim 1, wherein upper ends of the first tether and the second tether are connected to a front portion of the top chamber.
  6. 　請求項５において、前記トップチャンバは少なくとも前後方向の２ヶ所で車室天井部に固定されていることを特徴とするエアバッグ。 6. The airbag according to claim 5, wherein the top chamber is fixed to the vehicle interior ceiling at least at two locations in the front-rear direction.
  7. 　請求項５又は６において、前記トップチャンバと前記第１チャンバとの間に設けられた第３チャンバをさらに備えることを特徴とするエアバッグ。 7. The airbag according to claim 5, further comprising a third chamber provided between the top chamber and the first chamber.
  8. 　請求項７において、前記トップチャンバの前部と、前記第１チャンバと前記第３チャンバとの連結部との間に架け渡された第３テザーを有することを特徴とするエアバッグ。 8. The airbag according to claim 7, further comprising a third tether spanned between a front portion of the top chamber and a connecting portion between the first chamber and the third chamber.
  9. 　請求項１から８までのいずれか１項において、前記第１チャンバと前記第２チャンバとの連結部は、ガス流路幅が狭くなっていることを特徴とするエアバッグ。 9. The airbag according to claim 1, wherein the connecting portion between the first chamber and the second chamber has a narrow gas flow path width.
  10. 　請求項１から４までのいずれか１項において、前記エアバッグが膨張した状態で、車室天井部から下方へ放射状にのびる複数のテザーを有し、各テザーは該エアバッグの所定部分に連なっていることを特徴とするエアバッグ。 5. The method according to claim 1, further comprising: a plurality of tethers extending radially downward from the passenger compartment ceiling in a state where the airbag is inflated, and each tether is connected to a predetermined portion of the airbag. An airbag characterized by having
  11. 　請求項１から１０までのいずれか１項において、前記エアバッグが膨張した状態で、前記第１チャンバの後面と水平面との交角が２５°以上６５°以下となることを特徴とするエアバッグ。 11. The airbag according to any one of claims 1 to 10, wherein an intersection angle between a rear surface of the first chamber and a horizontal plane is 25 ° or more and 65 ° or less in a state where the airbag is inflated.
  12. 　請求項１から１１までのいずれか１項において、前記エアバッグが膨張した状態で、前記第１チャンバの後面は、左右方向センター部がその左右よりも前方に後退した凹部となっていることを特徴とするエアバッグ。 12. The rear surface of the first chamber according to any one of claims 1 to 11, wherein the rear surface of the first chamber is a concave portion whose front portion in the left-right direction is retracted further forward than the left and right. A featured airbag.
  13. 　請求項１から１２までのいずれか１項において、前記エアバッグが膨張した状態で、前記第１チャンバの後面は、左右方向センター部かつ上下方向の下部が、その左右よりも後方に突出した凸部となっていることを特徴とするエアバッグ。 13. The convex portion according to claim 1, wherein the rear surface of the first chamber has a lateral center portion and a vertical lower portion projecting rearward from the left and right sides in a state where the airbag is inflated. An air bag characterized by being a part.
  14. 　請求項１から１３までのいずれか１項において、前記第２チャンバの前後方向の中間部と、前記第１チャンバの上部又は該上部よりも前方部分との間に架け渡された第４テザーを有することを特徴とするエアバッグ。 14. The fourth tether spanned between an intermediate portion of the second chamber in the front-rear direction and an upper portion of the first chamber or a front portion of the upper portion of the second chamber according to claim 1. An air bag comprising the air bag.
  15. 　請求項１から１４までのいずれか１項において、前記第１チャンバの左右幅は、前記第２チャンバの左右幅よりも大きいことを特徴とするエアバッグ。 15. The airbag according to any one of claims 1 to 14, wherein a left-right width of the first chamber is larger than a left-right width of the second chamber.
  16. 　インフレータからのガスによって、座席に着席した乗員の前方に膨張するエアバッグにおいて、
    　車室天井部から下方かつ後方に向って膨張する第１チャンバと、
    　該第１チャンバの下部に連なり、下方に向って膨張する第２チャンバと、
    　該第２チャンバの下部に連なり、前方に向って膨張する第３チャンバと
    を有することを特徴とするエアバッグ。     In the airbag that inflates forward of the occupant seated in the seat by the gas from the inflator,
    A first chamber that expands downward and rearward from the passenger compartment ceiling;
    A second chamber connected to the lower portion of the first chamber and expanding downward;
    An air bag comprising: a third chamber connected to a lower portion of the second chamber and inflating toward the front.
  17. 　請求項１６において、前記第１チャンバと前記第２チャンバとの連結部もしくはその周辺部と、該第１チャンバよりも前方部分との間に架け渡された第１テザーを有することを特徴とするエアバッグ。 17. The method according to claim 16, further comprising a first tether spanned between a connection portion of the first chamber and the second chamber or a peripheral portion thereof, and a front portion of the first chamber. Airbag.
  18. 　請求項１６又は１７において、前記第３チャンバと、前記第１チャンバよりも前方部分との間に架け渡された第２テザーを有することを特徴とするエアバッグ。 18. The airbag according to claim 16 or 17, further comprising a second tether stretched between the third chamber and a front portion of the first chamber.
  19. 　請求項１８において、前記第２テザーは膨張した前記第３チャンバの前後方向の途中部分に連なっており、
    　該第３チャンバの前部と、該第２チャンバと該第３チャンバとの連結部との間に架け渡された第３テザーが設けられていることを特徴とするエアバッグ。     In Claim 18, the second tether is continued to the middle part of the expanded third chamber in the front-rear direction,
    An airbag comprising a third tether that is provided between a front portion of the third chamber and a connecting portion between the second chamber and the third chamber.
  20. 　請求項１９において、前記エアバッグが膨張した状態において、第３チャンバ前部は、前記第２テザーが連結された前記第３チャンバの前後方向の途中部分よりも高位に位置することを特徴とするエアバッグ。 20. The front portion of the third chamber is positioned higher than a middle portion in the front-rear direction of the third chamber to which the second tether is connected when the airbag is inflated. Airbag.
  21. 　請求項１８から２０までのいずれか１項において、前記エアバッグは、車室天井に沿って膨張するトップチャンバを有しており、
    　前記第１チャンバは該トップチャンバの後部に連なっており、
    　前記第１テザー及び前記第２テザーの上端は該トップチャンバの前部に連なっていることを特徴とするエアバッグ。     The airbag according to any one of claims 18 to 20, wherein the airbag has a top chamber that inflates along a vehicle compartment ceiling,
    The first chamber is connected to the rear of the top chamber;
    The airbag according to claim 1, wherein upper ends of the first tether and the second tether are connected to a front portion of the top chamber.
  22. 　請求項１６から２１までのいずれか１項において、前記第１チャンバと前記第２チャンバとの連結部及び該第２チャンバと前記第３チャンバの連結部は、ガス流路幅が狭くなっていることを特徴とするエアバッグ。 The gas flow path width of any one of claims 16 to 21, wherein a connecting portion between the first chamber and the second chamber and a connecting portion between the second chamber and the third chamber are narrow. An airbag characterized by that.
  23. 　請求項２１において、前記トップチャンバと第１チャンバとの連結部は、ガス流路幅が狭くなっていることを特徴とするエアバッグ。 22. The airbag according to claim 21, wherein the connecting portion between the top chamber and the first chamber has a narrow gas flow path width.
  24. 　請求項１６から２３までのいずれか１項において、前記第３チャンバは、前部が前席の後面に当接するように膨張することを特徴とするエアバッグ。 24. The airbag according to any one of claims 16 to 23, wherein the third chamber is inflated so that a front portion is in contact with a rear surface of a front seat.
  25. 　請求項１６から２４までのいずれか１項において、前記第１チャンバと前記第２チャンバとの連結部は、乗員の頭部よりも下方に位置することを特徴とするエアバッグ。 25. The airbag according to any one of claims 16 to 24, wherein a connecting portion between the first chamber and the second chamber is positioned below a passenger's head.
  26. 　請求項１６から２５までのいずれか１項において、前記第１チャンバの後面は、左右方向センター部がその左右よりも前方に後退した凹部となっていることを特徴とするエアバッグ。 26. The airbag according to any one of claims 16 to 25, wherein a rear surface of the first chamber is a concave portion whose left-right direction center portion is retracted forward from the left and right.
PCT/JP2017/024612 2016-07-12 2017-07-05 Air bag WO2018012363A1 (en)

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CN110682888A (en) * 2018-07-05 2020-01-14 奥托立夫开发公司 Pedestrian protection airbag device
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