JP6805571B2 - Passenger seat airbag - Google Patents

Description

The present invention relates to a passenger airbag, and more particularly to an airbag for a passenger seat, which can have a shape in which the occupant facing surface is relatively flat in the vertical and horizontal directions when the expansion is completed. The present invention particularly relates to a passenger seat airbag in which the occupant facing surface and the left and right side surfaces of the airbag are composed of a main panel, the upper surface of the airbag is composed of a top panel, and the lower surface of the airbag is composed of a bottom panel. .. In the following description, the front-rear, left-right, and up-down directions correspond to the front-rear, left-right, and up-down directions of the vehicle equipped with the passenger airbag, respectively.

As an airbag for a passenger seat composed of three panels, Patent Document 1 describes a tubular first base cloth and a second base cloth and a third base cloth joined to both end surfaces of the first base cloth. Passenger seat airbags with cloth are listed.

Patent Document 2 also describes a similar passenger seat airbag. In Patent Document 2, the width of the tubular first base cloth is larger on the base end side than on the tip end side. As shown in FIGS. 1 and 1 of Patent Documents 1 and 2, the passenger seat airbags of Patent Documents 1 and 2 expand so that the protruding angle portion protrudes toward the occupant.

JP-A-2014-94651 JP 2014-121965

An object of the present invention is to provide a passenger seat airbag in which the occupant facing surface can have a shape close to a flat surface in the vertical and horizontal directions in the expanded state.

The passenger seat airbag of the present invention includes a main panel that constitutes an occupant facing surface and left and right side surfaces of the passenger seat airbag, and a top panel that constitutes the upper surface of the passenger seat airbag.
It has a bottom panel constituting the lower surface of the passenger seat airbag, and the bottom panel is provided with an opening for an inflator.

In one aspect of the present invention, the front side portion of the top panel and the front side portion of the bottom panel are connected.

In one aspect of the present invention, there is a linear portion in which the central portion and the lower side of the upper side of the main panel and the rear side of the top panel and the bottom panel extend linearly in the left-right direction.

In one aspect of the present invention, the occupant facing surface of the expanded passenger seat airbag is substantially flat.

In one aspect of the present invention, the rear view shape of the inflated passenger airbag is substantially square.

In one aspect of the present invention, an overhanging portion is provided that projects laterally from the left side or the right side of the occupant facing surface.

In one aspect of the present invention, the overhanging portion extends from the upper part to the lower part of the passenger seat airbag.

In one aspect of the present invention, the overhanging portion is provided by providing a protruding portion protruding to the left or right near the rear side of the top panel and the bottom panel.

In one aspect of the present invention, the overhanging portion is provided by attaching a subchamber separate from the bag body to the bag body composed of the main panel, the top panel and the bottom panel.

In one aspect of the present invention, a through hole is provided to penetrate the passenger airbag.

In one aspect of the present invention, openings are provided in the top panel and the bottom panel, respectively, and the through holes are formed by providing a tubular panel between the openings.

In the passenger seat airbag of the present invention, since the main panel constitutes the occupant facing surface, the occupant facing surface can be made substantially flat. In particular, by providing a linear portion extending in the left-right direction on the rear side of the top panel and the bottom panel, the occupant facing surface of the inflated passenger airbag has a shape close to a substantially rectangular plane in the vertical and horizontal directions. Become. As a result, the left end side or the right end side of the occupant facing surface also receives the occupant at the time of the oblique collision, so that the occupant is restrained at the time of the oblique collision without unnecessarily increasing the volume of the airbag.

(A) is a perspective view showing an expanded state of the passenger seat airbag according to the embodiment, and (b) is an exploded view of the passenger seat airbag of (a). It is a panel block diagram of the passenger seat airbag of FIG. It is a side view which shows the expansion completion state of the passenger seat airbag mounted on an automobile. It is a perspective view which shows the expansion completion state of the passenger seat airbag which concerns on another embodiment. It is a panel block diagram of the passenger seat airbag of FIG. (A) is a perspective view which shows the expansion completion state of the passenger seat airbag which concerns on still another Embodiment. (B) is an exploded view of (a), and (c) is a sectional view taken along line CC of (a). It is a perspective view which shows the expansion completion state of the passenger seat airbag which concerns on still another Embodiment. It is a side view which shows the expansion completion state of the passenger seat airbag mounted on an automobile.

Hereinafter, embodiments will be described with reference to the drawings.

As shown in FIG. 3, the passenger seat airbag 1 according to the first embodiment shown in FIGS. 1 to 3 expands and expands between the instrument panel (instrument panel) 2 and the windshield 3. As shown in FIGS. 1 and 2, the passenger seat airbag 1 has a top panel 20 and a bottom panel 30 sewn to the main panel 10.

The main panel 10 has a substantially trapezoidal shape having an upper side 11, a left side 12, a right side 13, and a lower side 14. The central portion 11a of the upper side 11 in the left-right direction extends linearly in the left-right direction. L _{11 in} FIG. 2 indicates the length of the linear portion of the central portion 11a.

The left end side portion 11b and the right end side portion 11c of the upper side are slightly inclined so as to be lower as they are separated from the central portion 11a. The total length of the lower side 14 in the left-right direction is smaller than the total length of the upper side 11 in the left-right direction. The lower side 14 extends linearly in the left-right direction except for both left and right ends. L _{14 in} FIG. 2 indicates the length of this linear portion.

The left side 12 and the right side 13 are closer to each other toward the lower side 14. The left side 12 and the right side 13 are curved so that the intermediate portion in the longitudinal direction enters the center side in the left-right direction of the main panel 10.

The top panel 20 is a substantially trapezoidal panel having a rear side 21, a left side 22, a right side 23, and a front side 24. The distance between the left side 22 and the right side 23 gradually increases toward the rear side 21 side. In this embodiment, the intersections of the left side 22 and the right side 23 and the rear side 21 are rounded.

The rear side 21 extends linearly in the left-right direction except for the rounded left and right ends. L _{21 in} FIG. 2 indicates the length of this linear portion.

The front side 24 extends linearly in the left-right direction.

The bottom panel 30 is a substantially trapezoidal panel having a rear side 31, a left side 32, a right side 33, and a front side 34. The distance between the left side 32 and the right side 33 gradually increases toward the rear side 31 side. In this embodiment, the intersections of the left side 32 and the right side 33 and the rear side 31 are rounded.

The rear side 31 extends linearly in the left-right direction except for the rounded left and right ends. L _{31 in} FIG. 2 indicates the length of this linear portion.

The front side 34 extends linearly in the left-right direction.

An inflator opening 35 is provided on the front side of the bottom panel 30. A plurality of small holes 36 (four in this embodiment) for inserting the inflator mounting bolts are provided around the inflator opening 35.

The left side 22, the rear side 21, and the right side 23 of the top panel 20 are sewn on the upper side 11 of the main panel 10. The rear side 21 is sewn to the central portion 11a of the upper side 11, the left side 22 is sewn to the left end side portion 11b, and the right side 23 is sewn to the right end side portion 11c.

The rear side 31 of the bottom panel 30 is sewn to the lower side 14 of the main panel 10, the left side 32 of the bottom panel 30 is sewn to the left side 12, and the right side 33 of the bottom panel 30 is sewn to the left side 13.

The main panel 10 constitutes the occupant facing surface 1f of the airbag 1 and the left and right side surfaces 1s, the top panel 20 constitutes the upper surface of the airbag 1, and the bottom panel 30 constitutes the lower surface of the airbag 1. At the front edge of the airbag 1, the main panel 10 does not exist, and the front side 24 of the top panel 20 and the front side 34 of the bottom panel 30 are sewn together.

Reference numerals 10S, 20S, and 30S in FIG. 2 indicate stitching schedule lines between the panels 10, 20, and 30.

After sewing the panels 10, 20, and 30 together as described above, the airbag 1 is turned upside down through the inflator opening 35 so that the stitching allowance is arranged in the airbag 1 and the air in the product form is used. Let's call it bag 1.

The airbag 1 is attached with an inflator, folded, installed in a box-shaped case 5 (FIG. 3), and attached to the case 5 by the inflator mounting bolt. The instrument panel 2 is provided with a lid (not shown) so as to cover the folded body of the airbag 1. A passenger airbag device is composed of a folded airbag 1, an inflator, and a case 5. This lid may be provided as a part of the instrument panel 2, or may be provided as a lid-like member separate from the instrument panel 2. In the latter case, the lid is connected to case 5.

When the inflator is activated, the airbag 1 pushes open the lid and deploys in front of the passenger seat occupant between the instrument panel 2 and the windshield 3 to restrain the occupant.

The airbag 1 is provided with linear portions having lengths L ₁₁ , L ₁₄ , L ₂₁ , and L _{31 on} the panels 10, 20, and 30, so that when the expansion is completed, the occupant facing surface is provided. As shown in FIGS. 1 and 3, 1f has a substantially flat shape close to a flat surface in the vertical and horizontal directions. Further, the occupant facing surface 1f has a substantially rectangular shape in the rear view of the passenger seat airbag 1. Therefore, in the airbag 1, the occupant has a left side edge or a right side edge of the occupant facing surface 1f at the time of a vehicle oblique collision (a collision form in which an impact is applied to the vehicle from diagonally forward. Including offset collision). Accepted by the department. Therefore, the occupant can be restrained at the time of an oblique collision without increasing the volume of the airbag 1.

Since the passenger seat airbag 1 inflates so that the rear view of the occupant facing surface 1f is substantially rectangular, the inflated airbag between the instrument panel 2 and the windshield 3 is only in the center portion in the left-right direction of the bottom surface. The left side and right side of the bottom surface are also supported by the instrument panel 2. As a result, the posture of the passenger seat airbag 1 inflated between the instrument panel 2 and the windshield 3 becomes more stable.

The passenger seat airbags 1 shown in FIGS. 1 to 3 are symmetrical, and the panels 10, 20, and 30 are all symmetrical, but the present invention is not limited to this, and the left or right side of the occupant facing surface 1f. May be configured to project laterally from the one in FIG.

Passenger seat airbags 1A and 1B shown in FIGS. 4 and 5 and 6 show an example of this.

4 and 5 are a perspective view and a panel configuration diagram of the passenger seat airbag 1A, as in FIGS. 1 and 2.

The passenger seat airbag 1A is provided with an overhanging portion 7 that projects to the left on the occupant side. The overhanging portion 7 extends from the upper part to the lower part of the passenger seat airbag 1A.

As shown in FIG. 5, in the top panel 20A and the bottom panel 30A constituting the passenger seat airbag 1A, protrusions 27 and 37 are provided so that the left sides 22 and 32 project to the left in the vicinity of the rear sides 21 and 31. Has been done.

In the main panel 10A, the left half side of the linear central portion 11a is longer than that in FIG. 1 by the length Q so as to go around the protruding portions 27 and 37. That is, in FIG. 5, the length L ₁₁ of the linear central portion 11a is longer by Q than in the case of FIG.

In the passenger seat airbag 1A, the overhanging portion 7 expands between the steering wheel or the left A pillar and the occupant at the time of a left oblique collision. Since the volume of the overhanging portion 7 is smaller than the total volume of the passenger seat airbag 1A, the passenger seat airbag 1A is rapidly expanded without increasing the inflator output at all or almost.

Other configurations of the passenger seat airbag 1A of FIGS. 4 and 5 are the same as those of the passenger airbag 1 of FIGS. 1 and 2, and the same reference numerals indicate the same parts.

The passenger seat airbag 1B of FIG. 6 is configured such that the occupant facing surface 1f projects laterally by attaching the subchamber 40 to the bag body 1'having the same shape as the passenger airbag 1 of FIGS. 1 and 2. The passenger airbag 1B is shown. 6 (a) is a perspective view of the passenger airbag 1B, FIG. 6 (b) is a perspective view of the bag body 1'and the subchamber 40 separated, and FIG. 6 (c) is FIG. 6 (c). It is sectional drawing of CC line of a).

The bag body 1'is provided with an opening 1h on the rear side of the left side portion of the passenger seat airbag 1, and other configurations are the same as those of the passenger airbag 1. This opening 1h is provided in the main panel 10.

The subchamber 40 has an outer curved surface 41, an inner curved surface 42, an upper end surface 43, and a lower end surface 44. An opening 45 is provided in the inner curved surface 42. The subchamber 40 is manufactured by sewing a panel, and the peripheral edge of the inner curved surface 42 is sewn to the bag body 1'. Further, the opening 1h and the opening 45 have the same size, and their peripheral edges are sewn together.

The openings 1h and 45 are circular, but may have other shapes such as an ellipse. Two or more openings 1h and 45 may be provided, respectively. Other configurations of the passenger seat airbag 1B are the same as those of the passenger seat airbag 1, and the same reference numerals indicate the same parts.

When the passenger seat airbag 1B expands, the bag body 1'first expands, and then gas flows into the subchamber 40 through the openings 1h and 45, and the subchamber 40 expands. The subchamber 40 expands between the occupant and the steering or left A-pillar. Since the volume of the subchamber 40 is smaller than that of the bag body 1', the passenger airbag 1B is rapidly inflated without increasing the output of the inflator at all or almost.

Since the passenger seat airbag 1B is composed of one panel (main panel 10) from the occupant facing surface 1f to the bag side portion, the sewn portions in the vertical direction on the left side and the right side of the occupant facing surface 1f. There is no such thing, and the degree of freedom in arranging the subchamber 40 is high.

In FIGS. 4 to 6, the overhanging portion is arranged on the left side of the occupant facing surface 1f, but it may be arranged on the right side. Further, the overhanging portion may be provided on both the left side and the right side.

FIGS. 7 and 8 show the passenger seat airbag 1C provided with a through hole in order to reduce the internal volume of the airbag. 7 is a perspective view similar to FIG. 1, and FIG. 8 is a side view similar to FIG.

The top panel 20 and the bottom panel 30 constituting the passenger seat airbag 1C are provided with openings 28 and 38, and a tubular panel 8 is provided so as to connect the openings 28 and 38. The upper end of the tubular panel 8 is sewn to the peripheral edge of the opening 28, and the lower end of the tubular panel 8 is sewn to the peripheral edge of the opening 38. The tubular panel 8 and the openings 28 and 38 form through holes that vertically penetrate the passenger airbag 1C.

Other configurations of the passenger seat airbag 1C are the same as those of the passenger seat airbag 1, and the same reference numerals indicate the same parts.

The passenger seat airbag 1C has a smaller internal volume than the passenger airbag 1 due to the provision of the through hole. Therefore, even if the inflator output is reduced, the expansion is completed quickly.

Further, since the tubular panel 8 connects the top panel 20 and the bottom panel 30, the distance between the highest point 1j and the lowest point 1k in the free expansion completed state is smaller than that of the passenger airbag 1. It becomes a thing. For this reason, in the rear view of the passenger seat airbag 1C, the upper side and the lower side have a long linear extension in the left-right direction, resulting in an expansion complete shape.

The through hole may be provided so as to penetrate the passenger seat airbag in the left-right direction. Further, two or more through holes may be provided.

The above embodiment is an example of the present invention, and the present invention may be a form other than the illustration. For example, in the above embodiment, the main panels 10 and 10A are composed of one continuous panel from the left end side to the right end side, but the main panel is formed by connecting two or more panels by stitching or the like. You may. Specifically, a main panel in which the left half side panel and the right half side panel having a shape in which the main panel is divided at the center are connected may be used.

In the present invention, a tether may be provided to regulate the shape of the passenger seat airbag in the expanded state.

1,1A, 1B, 1C Airbag 1'Bag body 1f Crew facing surface 1s Side surface 2 Instrument panel 3 Windshield 4 Inflator 5 Case 7 Overhang 8 Cylindrical panel 10,10A Main panel 20,20A Top panel 30,30A Bottom panel 35 Inflator opening 40 Subchamber

Claims (8)

The main panel (10) that constitutes the passenger seat facing surface and the left and right side surfaces of the passenger airbag,
The top panel (20) that constitutes the upper surface of the passenger airbag and
The passenger seat has a bottom panel (30) constituting the lower surface of the passenger airbag, the bottom panel is provided with an opening for an inflator, and the left and right side surfaces are composed of only the main panel. Airbag for
The occupant facing surface of the inflated passenger airbag is substantially flat.
The main panel (10) is a substantially trapezoid having an upper side (11), a left side (12), a right side (13), and a lower side (14) having a length smaller than that of the upper side (11).
The left end side portion (11b) and the right end side portion (11c) of the upper side (11) are inclined so as to be lower as they are separated from the central portion (11a) of the upper side.
The lower side (14) extends linearly in the left-right direction except for the left and right ends.
The left side (12) and the right side (13) are closer to each other toward the lower side (14) side, and the middle part of the left side (12) and the right side (13) in the longitudinal direction is the center in the left-right direction of the main panel (10). It is curved so that it goes into the side
The top panel (20) is a substantially trapezoid having a rear side (21), a left side (22), a right side (23), and a front side (24).
The distance between the left side (22) and the right side (23) gradually increases toward the rear side (21).
The intersection of the left side (22) and the right side (23) and the rear side (21) is rounded.
The rear side (21) extends linearly in the left-right direction except for the rounded left and right ends.
The front side (24) extends linearly in the left-right direction.
The bottom panel (30) is a substantially trapezoid having a rear side (31), a left side (32), a right side (33), and a front side (34).
The distance between the left side (32) and the right side (33) gradually increases toward the rear side (31).
The intersection of the left side (32) and the right side (33) and the rear side (31) is rounded.
The rear side (31) extends linearly in the left-right direction except for the rounded left and right ends.
The left side (22), rear side (21) and right side (23) of the top panel (20) are sewn on the upper side (11) of the main panel (10), and the rear side (21) is the upper side (11). ) Is sewn to the central portion (11a), the left side (22) is sewn to the left end side portion (11b) of the upper side (11), and the right side (23) is the right end side portion of the upper side (11). It is sewn on (11c) and
The rear side (31) of the bottom panel (30) is sewn to the lower side (14) of the main panel (10), the left side (32) of the bottom panel (30) is sewn to the left side (12), and the right side (13) is sewn. ), The right side (33) of the bottom panel (30) is sewn on the passenger seat airbag. The passenger seat airbag according to claim 1, wherein the front side portion of the top panel and the front side portion of the bottom panel are combined. The passenger airbag according to claim 1 or 2, wherein the rear view shape of the expanded passenger airbag is substantially square. The passenger seat airbag according to any one of claims 1 to 3, wherein an overhanging portion is provided so as to project laterally from the left side or the right side of the occupant facing surface. The passenger seat airbag according to claim 4, wherein the overhanging portion extends from the upper part to the lower part of the passenger seat airbag. The assistant according to claim 4 or 5, wherein the overhanging portion is provided by providing the protruding portion protruding to the left or right near the rear side of the top panel and the bottom panel. Seat airbag. According to claim 4 or 5, the overhanging portion is provided by attaching a sub-chamber separate from the bag main body to the bag main body including the main panel, the top panel and the bottom panel. Airbag for the passenger seat. The passenger airbag according to any one of claims 1 to 7, wherein a through hole is provided for penetrating the passenger airbag.

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