JP2019130944A - Air bag device and air bag - Google Patents

Abstract

To provide an air bag device capable of restraining an occupant even when a seat is moved or rotated, and an air bag suitable therefor.SOLUTION: When collision is detected or predicted, an inflator 11 is actuated, a gas is supplied into an air bag 10, and the air bag 10 is expanded downward. The air bag 10 is expanded and developed to surround an upper half body of an occupant and a seat back SB, for restraining an occupant. A retainer 9 is moved following movement of the seat S, and the retainer 9 is rotated following rotation of the seat S.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an airbag device and an airbag for restraining an occupant seated in a vehicle seat, and more particularly to an airbag and an airbag that are inflated and deployed so as to surround the upper body of the occupant from above to below. Relates to the device.

  Patent Document 1 discloses an airbag and an airbag apparatus that are inflated and deployed so as to surround the upper body of the occupant from above to below the occupant. In Patent Document 1, an airbag is supported on a ring-shaped airbag base attached to a roof beam of a vehicle. The airbag of Patent Document 1 has a cylindrical outer peripheral surface and is inflated and deployed so as to have a shape in which a recess is provided upward from the bottom surface. The recessed portion of the airbag, which is the final deployed shape, surrounds the upper body of the occupant.

US Patent Application Publication No. 2017/0267204

  The present invention is an airbag device capable of inflating and deploying to restrain an occupant so as to surround the upper body of the occupant from above the occupant toward the lower side even when the seat moves or rotates, and the airbag device suitable for the airbag device. An object is to provide an airbag.

  An airbag device according to an aspect of the present invention includes an airbag support member disposed above an occupant seated in a vehicle seat, and is supported by the airbag support member. An airbag apparatus having an airbag that inflates so as to surround the seat back and an inflator for inflating the airbag includes an apparatus that moves or rotates the airbag support member.

  The airbag apparatus according to one aspect of the present invention is characterized in that a duct member for introducing gas from the inflator into the airbag is provided. The duct member may be a flexible pipe.

  In the airbag apparatus of one aspect of the present invention, the inflator is supported by the airbag support member or is supported by a strength member of a vehicle.

  An airbag apparatus according to an aspect of the present invention includes a detection unit that detects movement or rotation of the seat, and moves or rotates the airbag support member following the movement or rotation of the seat detected by the detection unit. And a driving device.

  In the airbag device according to one aspect of the present invention, the airbag includes a back portion that is deployed behind the seat back of the seat, a side portion that is deployed on the left and right sides of the occupant sitting on the seat, and the front of the occupant. And a front portion that unfolds.

  In the airbag device according to one aspect of the present invention, the front portion, the side portion, and the back portion each have a vertical cell that extends in the vertical direction in an airbag inflated state and is inflated by a gas from the inflator. Features.

  In the airbag device according to one aspect of the present invention, in the airbag inflated state, a lateral cell extending in the airbag circumferential direction is provided along the lower end of the airbag, and a lower portion of the vertical cell is formed in the lateral cell. It is characterized by communication.

  The airbag device according to one aspect of the present invention is characterized in that the expanded thickness of the horizontal cell is larger than the expanded thickness of the vertical cell when the airbag is completely expanded.

  The airbag device according to one aspect of the present invention is characterized in that the back portion includes the vertical cell and a non-inflatable portion extending in the vertical direction along both sides of the vertical cell.

  The airbag device according to one aspect of the present invention is characterized in that an opening is provided in a part of the non-inflatable portion.

  The airbag device of one embodiment of the present invention is characterized in that an occupant escape portion extending in the vertical direction of the inflated airbag is provided.

  The airbag device according to one aspect of the present invention is characterized in that the occupant escape portion is closed by a fastener or a string.

  An airbag device according to an aspect of the present invention includes a vehicle collision prediction device and an inflator operation device that activates the inflator when the prediction device predicts a collision.

  The airbag according to one aspect of the present invention includes a seatback standing device that returns a seatback of a seat to a standing state when the prediction device predicts a collision.

  An airbag device according to one aspect of the present invention is an airbag that inflates so as to surround the upper body of an occupant from above to below from an occupant sitting on a vehicle seat, and extends in the vertical direction of the inflated airbag. An occupant escape section is provided.

  The airbag according to one aspect of the present invention is characterized in that the occupant escape portion is closed by a fastener or a string.

  An airbag according to one aspect of the present invention is an airbag that inflates so as to surround the upper body of an occupant from above to below from an occupant seated in a vehicle seat. It has a horizontal cell extending in the direction and a vertical cell connected to the horizontal cell and extending in the vertical direction.

  In the airbag device of the present invention, the position or orientation of the airbag can be changed in response to the movement or rotation of the seat.

  When the occupant escape portion extending in the vertical direction is provided in the airbag, the occupant can escape from the escape portion after the vehicle collision.

1 is a perspective view of an airbag according to an embodiment. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. It is the IV-IV sectional view taken on the line of FIG. FIG. 4 is an enlarged view of a portion V in FIG. 3. It is a longitudinal cross-sectional view which shows the airbag apparatus concerning embodiment.

  Hereinafter, an airbag device and an airbag according to embodiments will be described with reference to the drawings.

  FIG. 6 is a longitudinal sectional view showing a seat of an automobile provided with the airbag device according to the embodiment and a ceiling portion above the seat.

  An airbag device 1 is attached to a roof member R above a seat S of an automobile. The airbag device 1 includes a disk-shaped fixed plate 2 attached to a roof member R by a bracket 3, a swivel plate 4 held on the fixed plate 2 by a suspension member 5, and a swivel plate 4. A swiveling device 6 for swiveling, a moving device 7 disposed below the swiveling plate 4, and a retainer attached to a lower side of a movable block 8 provided on the moving device 7 via a swiveling mechanism 13. 9, an airbag 10 that is folded and accommodated in the retainer 9, a gas generating inflator 11 that is fixed to the swivel plate 4, a flexible pipe 12 that guides the gas in the inflator 11 into the airbag 10, and the like. Have.

  Although not shown, the turning mechanism 13 includes a motor, and is configured to be turnable about a vertical axis so that the direction of the retainer 9 relative to the block 8 can be changed. However, when the seat S moves only without turning, the turning mechanism 13 is omitted.

  The swivel device 6 is fixed to the upper surface of the central portion of the swivel plate 4 and has a shaft 14 that rises vertically upward, a gear 15 that is fixed to the upper end of the shaft 14, a drive gear 16 that meshes with the gear 15, and the drive gear. Has a motor 17 or the like fixed to the tip of the rotary shaft. The motor 17 is fixed to the fixed plate 2.

  The shaft 14 and the rotation shaft of the motor 17 extend through the holes of the fixed plate 2 and above the fixed plate 2.

  A rail (not shown) is provided so as to go around the upper surface of the outer peripheral edge of the disk-shaped fixed plate 2. The suspension member 5 is provided with a slider 5a that moves along the rail. When the motor 17 is driven, the turning plate 4 rotates around the axis of the shaft 14 through the gears 16 and 15 and the shaft 14.

  Walls 19 and 19 are suspended from both ends in the diameter direction of the swivel plate 4. The moving device 7 includes a screw shaft 20 spanned between the walls 19, 19, a motor 21 to which one end of the screw shaft 20 is connected, the block 8 screwed to the screw shaft 20, and the like.

  A guide rail (not shown) is provided on the lower surface of the swivel plate 4 in parallel with the screw shaft 20, and the block 8 is slidably engaged with the guide rail. When the motor 21 is rotated, the screw shaft 20 rotates and the block 8 moves along the screw shaft 20.

  Therefore, the motor 17 can change the direction of the screw shaft 20 (phase θ around the axis 14), and the motor 21 can change the distance of the block 8 from the axis 14 (radial distance r). By changing r and θ, the retainer 9 can be moved to any position in the vehicle width direction and the front-rear direction. Moreover, the retainer 9 can be swung by the swivel mechanism 13 and the direction thereof can be changed to a desired direction.

  The seat S is movable in the front-rear direction and the left-right direction of the automobile, and is further rotatable around the vertical axis.

  A control device (not shown) for detecting the position and orientation of the seat S with a sensor and changing the position and orientation of the retainer 9 following the position and orientation is provided. This control device positions the retainer 9 above the seat S (particularly above the headrest) and the direction of the airbag 10 that inflates downward from the retainer 9 (front-rear direction). Control to match.

  Next, the configuration of the airbag 10 will be described with reference to FIGS.

  The airbag 10 is configured to be inflatable so as to surround the upper body of the passenger sitting on the seat S and the seat back SB. The airbag 10 includes an upper top cell 30, a plurality of vertical cells 31 to 38 that extend downward from the top cell 30, a horizontal cell 40 that circulates around the lower end of the airbag 10, and the like.

  The top cell 30 expands in an annular shape so as to go around the upper portion of the airbag 10. The distal end of the flexible pipe 12 is connected to a gas inlet 30 a provided in the top cell 30.

  The vertical cell 31 expands so as to be positioned behind the seat back SB. The vertical cells 32 and 33 constitute a right side portion that expands so as to be positioned on the right side of the occupant sitting on the seat S. The vertical cells 37 and 38 constitute a left side portion that expands so as to be positioned on the left side of the passenger. The vertical cells 34 to 36 constitute a front portion that expands so as to be positioned in front of the occupant. The left and right side portions of the vertical cell 31 are non-inflatable portions 42. Each non-inflatable portion 42 is provided with an opening 43. The vertical cell 31 and the non-inflatable portion 42 constitute a back portion of the airbag 10.

  In this embodiment, an occupant escape portion 44 formed of a slit extending from the lower end of the airbag 10 to the middle in the vertical direction is provided between the vertical cells 37 and 38. This passenger escape portion is closed by a flat fastener 45.

  The airbag 10 is manufactured by sewing a base fabric. In order to regulate the expansion thickness of the top cell 30 and the vertical cells 32 to 38, an annular stitching portion 47 for stitching the base fabric on the outer peripheral surface side and the base fabric on the inner peripheral surface side is provided.

  The airbag 10 configured as described above is folded and accommodated in the retainer 9. The retainer 9 is provided with a tear line, and when the airbag 10 is inflated, the retainer 9 is cleaved along the tear line.

  When a vehicle collision is detected or predicted, the inflator 11 is activated, gas is supplied into the airbag 10, and the airbag 10 is inflated downward. As shown in FIG. 6, the airbag 10 is inflated and deployed so as to surround the upper body of the occupant and the seat back SB, and restrains the occupant.

  In this airbag device, the retainer 9 moves following the movement of the seat S, and the retainer 9 rotates following the rotation of the seat S. Therefore, the vertical cells 34, 35, 36 of the inflated airbag 10 are positioned in front of the occupant, and the vertical cells 31 are positioned behind the seat back SB. After the automobile stops, the occupant can escape by opening the escape portion 44. A person other than the passenger in the seat S may open the escape portion 44.

In the said embodiment, although the escape part 44 is provided in one place, you may provide in two or more places. In the above embodiment, the inflator 11 is supported by the swivel plate 4, but may be attached to another airbag support member. Further, the inflator 11 may be attached to a strong portion of the vehicle body directly or via a member such as a retainer.

  In the present invention, the expansion thickness (thickness in the radial direction of the airbag) of the horizontal cell 40 in the inflated state may be larger than the expansion thickness of the vertical cells 31 to 38. In the present invention, the lower inner diameter may be increased toward the lower side in the expansion completed state.

  In the present invention, when an automobile collision is predicted, an upright driving device for raising the seatback SB may be provided.

  The seat belt device for restraining the passenger is preferably installed in the seat S.

  The above description is an example of the present invention, and the present invention may have a configuration other than the above.

  In this invention, you may employ | adopt an XY drive device so that the retainer 9 may be moved to the X direction (for example, vehicle front-back direction) and the Y direction (for example, vehicle left-right direction) orthogonal to this.

  When the airbag device is installed in the front seat, the vertical cell 31 located behind the seat back SB may restrain the rear seat occupant.

  Vertical cells may also be provided in the non-inflatable portion 42. That is, a plurality of vertical cells may surround the upper body of the occupant and the seat back SB.

  A simulated roof that covers the airbag device may be provided above the seat S. The airbag device is disposed between the roof member R and the simulated roof, and is normally invisible to the occupant. A tear line is formed on the simulated roof.

  The airbag device of the present invention may include a light emitter that can emit light toward an occupant. For example, the light emitter may be provided on a wall 19 suspended from the swivel plate 4. However, the installation position of the light emitter is not limited to this.

  The moving range of the airbag apparatus according to the present invention is desirably a range that does not interfere with vehicle parts such as a ceiling light installed on the ceiling of the vehicle.

  The airbag apparatus of the present invention may include a spare battery independent of the vehicle battery. This spare battery is installed, for example, so as to supply a starting current to the inflator.

  In this invention, you may comprise so that a passenger | crew position may be detected using the detection information of the device installed in the vehicle and detecting a passenger | crew's state (a face, a gaze, etc.).

DESCRIPTION OF SYMBOLS 1 Airbag apparatus 9 Retainer 10 Airbag 13 Turning mechanism 17,21 Motor 30 Top cell 31-38 Vertical cell 40 Horizontal cell 42 Non-inflatable part 44 Escape part

Claims (19)

An airbag support member disposed above an occupant seated in a vehicle seat;
An airbag that is supported by the airbag support member and inflates so as to surround the upper body of the occupant and the seat back of the seat toward the lower side;
In an airbag device having an inflator for inflating an airbag,
An airbag apparatus comprising an apparatus for moving or rotating the airbag support member.   2. The airbag device according to claim 1, further comprising a duct member for introducing gas from the inflator into the airbag.   The airbag apparatus according to claim 2, wherein the duct member is a flexible pipe.   The airbag device according to any one of claims 1 to 3, wherein the inflator is supported by the airbag support member.   The airbag device according to claim 1, wherein the inflator is supported by a strength member of a vehicle. Detecting means for detecting movement or rotation of the seat;
6. The airbag apparatus according to claim 1, further comprising a drive device that moves or rotates the airbag support member following the movement or rotation of the seat detected by the detection means.   The airbag has a back portion that is deployed behind a seat back of a seat, a side portion that is deployed on the left and right sides of an occupant sitting on the seat, and a front portion that is deployed in front of the occupant. The airbag device according to any one of claims 1 to 6.   The airbag device according to claim 7, wherein the front portion, the side portion, and the back portion each have a vertical cell that extends in a vertical direction in an airbag inflated state and that is inflated by a gas from the inflator. In the airbag inflated state, a lateral cell extending in the airbag circumferential direction along the lower end of the airbag is provided,
9. The airbag device according to claim 8, wherein a lower portion of the vertical cell communicates with the horizontal cell.   The airbag device according to claim 9, wherein the inflation thickness of the horizontal cell is larger than the inflation thickness of the vertical cell when the airbag is completely inflated.   The airbag device according to any one of claims 7 to 10, wherein the back portion includes the vertical cell and a non-inflatable portion extending in a vertical direction along both sides of the vertical cell.   The airbag device according to claim 11, wherein an opening is provided in a part of the non-inflatable portion.   The airbag device according to any one of claims 1 to 12, further comprising an occupant escape portion extending in a vertical direction of the inflated airbag.   13. The airbag device according to claim 12, wherein the occupant escape portion is closed by a fastener or a string.   The airbag device according to any one of claims 1 to 14, further comprising a vehicle collision prediction device and an inflator operation device that activates the inflator when the prediction device predicts a collision.   The airbag apparatus according to any one of claims 1 to 15, further comprising a seat back standing device that returns a seat back of the seat to a standing state when the prediction device predicts a collision. In an airbag that inflates so as to surround the upper body of the occupant from above to below the occupant seated in the vehicle seat,
An airbag comprising an occupant escape portion extending in a vertical direction of an inflated airbag.   The airbag according to claim 17, wherein the occupant escape portion is closed by a fastener or a string. In an airbag that inflates so as to surround the upper body of the occupant from above to below the occupant seated in the vehicle seat,
An airbag comprising: a transverse cell extending in a circumferential direction at a lower end portion of an airbag in a completed inflation state; and a longitudinal cell connected to the transverse cell and extending in a vertical direction.

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