JP4884757B2 - Airbag device for automobile - Google Patents

Description

  The present invention relates to an automobile airbag device.

  The automobile is provided with an airbag that is deployed to the side of the occupant to protect the occupant in a side collision. The airbag is installed at an end portion of the side door or the seat back, and is configured to be deployed forward toward the space between the occupant and the side door by the gas injected from the inflator at the time of collision.

  This type of airbag is partitioned into a lower space that protects the lower back and an upper space that protects the chest by a partition provided inside. A gas injection port of the inflator is exposed at the end of the partition wall, and gas from the gas injection port is simultaneously supplied to the lower space and the upper space with the partition wall as a boundary.

When the gas is directly applied to the end of the partition wall, damage to the partition wall is large. Therefore, a guide plate facing the gas injection port is provided between the end of the partition wall and the gas injection port. Then, the gas injected from the gas injection port is applied to the guide plate so as to be supplied to the lower space and the upper space at a predetermined ratio. In general, a large amount of gas is supplied to the lower space corresponding to the waist, and the expansion pressure is set to be higher than that of the upper space (see, for example, Patent Document 1).
JP 2005-238890 A

  However, in such a conventional technique, the gas is applied to the guide plate and then shunted to the lower space and the upper space to mitigate the damage caused by the gas in the partition wall, but the lower space is lower than the upper space. When a large amount of gas is supplied to the space and the expansion pressure of the lower space is increased to be higher than that of the upper space, the end of the partition flutters upward beyond the guide plate due to the pressure of the gas supplied to the lower space side. , There is a risk that the gas cannot be supplied in a split flow at the correct ratio.

  The present invention has been made by paying attention to such a conventional technique, and can prevent the flapping of the partition wall upward, and can supply the gas in a correct ratio up and down. A device is provided.

According to the first aspect of the present invention, the side door or the seat has a bag-like airbag that is deployed forward toward the space between the occupant and the side door, and the airbag is disposed in the lower space inside the airbag. And an inflator with a gas injection port corresponding to the end of the partition is provided behind the airbag, and a gas is provided between the end of the partition and the gas injection port of the inflator. A vehicle air bag device that is provided with a guide plate facing the injection port and supplies a gas to the lower space and the upper space in a predetermined ratio by applying the gas injected from the gas injection port to the guide plate, A flange having a size overlapping a predetermined dimension from the upper side with respect to the end of the partition wall is formed at the upper end of the guide plate.

  The invention according to claim 2 is characterized in that the flange has an upward angle with respect to the horizontal.

  The invention described in claim 3 is characterized in that the guide plate and the flange are integrally formed with a retainer for fixing the inflator.

According to the first aspect of the present invention, since the flange having a size that overlaps the end of the partition wall by a predetermined dimension from the upper side is formed on the upper end of the guide plate, the flange prevents the partition end from flapping upward. , Gas can be split up and down at the correct ratio.

  According to the second aspect of the present invention, since the flange has an upward angle relative to the horizontal, the effect of gas dispersion in the upper space is improved.

  According to the invention described in claim 3, since the guide plate and the flange are integrally formed with the retainer for fixing the inflator, the number of parts does not increase.

The present invention is to prevent fluttering of the upper partition wall of the terminal, the object of providing an air bag device for an automobile which can be diverted supplied vertically to the gas in the correct proportions, the side door or sheet, and the occupant It has a bag-like airbag that expands forward toward the space between the side doors, and a partition that divides the airbag into a lower space and an upper space is provided inside the airbag, and behind the airbag Is provided with an inflator in a state where the gas injection port corresponds to the end of the partition wall, and a guide plate facing the gas injection port is provided between the end of the partition wall and the gas injection port of the inflator. An automotive airbag device for supplying gas to a lower space and an upper space at a predetermined ratio by applying the generated gas to the guide plate, wherein the upper end of the guide plate is located above the end of the partition wall. By forming the size of the flange which overlaps by a predetermined dimension of was achieved. Embodiments of the present invention will be described below with reference to the drawings.

  1-7 is a figure which shows one Example of this invention. The automobile 1 according to this embodiment includes front airbags (not shown) in a folded state on the steering wheel 2 in front of the driver and the instrument panel 3 in front of the passenger seat. This front-impact airbag is deployed to the vehicle interior side when an automobile collides with the front.

  The side door 4 of the automobile 1 is provided with a side impact airbag 5. The airbag 5 is deployed toward a space between the occupant M and the side door 4 on the side receiving the collision F when the automobile receives a collision F from the side.

  Inside the airbag 5, a substantially horizontal partition wall 6 that partitions the airbag 5 into a lower space A and an upper space B is provided. The partition wall 6 is joined to the left and right side portions of the airbag 5 with both side ends folded downward. However, a semi-oval opening 7 is formed on the rear side of the partition wall 6 between the side end on the outer side in the vehicle width direction and the side surface portion of the airbag 5. The terminal 6a that forms the opening 7 is also bent downward, but is not joined to the airbag 5 and is spaced apart.

  An inflator 8 is installed at a rear end portion of the airbag 5 while being held by a retainer 9. The inflator 8 is rod-shaped and has a gas injection port 10 at the lower end. From the gas injection port 10, the gas G is injected in the horizontal direction. The retainer 9 has two arms 11 for holding the inflator 8, and has a guide plate 12 facing the gas injection port 10 at the lower end. The guide plate 12 turns around to the front side of the gas injection port 10 in a curved state, and the gas injection port 10 and the front guide plate 12 are separated in the front-rear direction.

From the upper end of the guide plate 12, a flange 13 is formed continuously from the inner position in the vehicle width direction to the front . Flange 13 is in the upward by a predetermined angle θ to the horizontal (e.g. 45 °) (see Figure 7.). The outer shape of the flange 13 is larger than the opening 7 of the partition wall 6, and the flange 13 is overlapped with the upper side of the end 6a of the partition wall 6 by a predetermined dimension d (see FIG. 6) . And since the flange 13 is integrally formed with the retainer 9 for fixing the inflator 8, the number of parts does not increase.

  The retainer 9 holding the inflator 8 is inserted into the airbag 5 from the rear end portion of the airbag 5, and the airbag 9 is configured so that the guide plate 12 of the retainer 9 corresponds to the terminal 6 a of the partition wall 6 in the opening 7. Each of the rear end portions 5 is fixed to the side door 4 together with a case 15 having an openable / closable cover 14. The airbag 5 is stored in a case 15 in a folded state and covered with a cover 14. The cover 14 constitutes a part of the door trim of the side door 4.

  Next, an operation when the automobile 1 receives a collision F from the side surface will be described. When the collision F is received, the sensor detects it and activates the inflator 8 of the airbag 5 on the side receiving the collision F. When the inflator 8 is activated and the gas G is injected from the gas injection port 10, the airbag 5 opens the cover 14 of the case 15 and deploys to the vehicle interior side.

  The gas G from the gas injection port 10 hits the guide plate 12 of the retainer 9 and is supplied to the lower space A and the upper space B in a predetermined ratio. In the case of this embodiment, in order to reliably protect the occupant's waist, a large amount of gas G flows in the lower space A, and the pressure in the lower space A when expanded is higher than that in the upper space B. Has been.

  When the gas G injected from the gas injection port 10 is supplied to the lower space A and the upper space B and the entire airbag 5 is inflated, the airbag 5 expands forward, and the occupant M and the side door 4 Get into the space between. Therefore, even if the occupant M seated on the seat 16 falls to the side door 4 side due to the inertial force caused by the collision F, the occupant M can be received and protected by the airbag 5 deployed forward.

  According to this embodiment, since the flange 13 having a size overlapping the terminal 6a of the partition wall 6 from the upper side is formed at the upper end of the guide plate 12, a large amount of gas G is supplied from the gas injection port 10 of the inflator 8 to the lower space A. Even though the partition wall 6 rises and deforms to a position along the flange 13 as shown in FIG. 7, the end 6 a of the partition wall 6 does not flutter upward beyond the flange 13. Therefore, the gas G can be divided and supplied to the lower space A and the upper space B at a correct ratio.

  In addition, since the flange 13 is upward by a predetermined angle θ from the horizontal, the gas G is supplied from the gas injection port 10 provided at the lower end of the inflator 8 to the entire upper space B in a dispersed state. Although difficult, it is possible to disperse the gas G to the upper corners of the upper space B by the flange 13 with the upward angle, and the effect of dispersing the gas G into the upper space B is improved.

  In the above embodiment, the structure in which the side impact airbag 5 is deployed forward from the side door 4 is taken as an example, but the side impact airbag is deployed forward from the end of the seat back of the seat 16. Also good.

The top view which shows the side collision state of the motor vehicle which concerns on one Example of this invention. The top view which shows the state which the airbag for side collision expand | deployed. The disassembled perspective view which shows the attachment structure of an airbag. The perspective view which shows the attachment state to the airbag of an inflator. Sectional drawing which shows the internal structure of an airbag. The top view which shows the attachment structure to the airbag of an inflator. Sectional drawing which follows the arrow SA-SA line in FIG.

Explanation of symbols

4 Side door 5 Air bag 6 Bulkhead
6a Bulkhead end 8 Inflator
9 Retainer 10 Gas injection port 12 Guide plate 13 Flange A Lower space B Upper space F Collision G Gas M Crew d Overlap size

Claims (3)

A side door or a seat has a bag-like airbag that expands forward toward the space between the occupant and the side door, and a partition that partitions the airbag into a lower space and an upper space is provided inside the airbag. An inflator with a gas injection port corresponding to the end of the partition wall is provided behind the airbag, and a guide plate facing the gas injection port is provided between the end of the partition wall and the gas injection port of the inflator. An automotive airbag apparatus that is provided and supplies a gas to a lower space and an upper space at a predetermined ratio by applying the gas injected from the gas injection port to the guide plate,
An automobile airbag device characterized in that a flange having a size overlapping a predetermined dimension from the upper side with respect to the end of the partition wall is formed on the upper end of the guide plate. The automobile airbag device according to claim 1,
An airbag apparatus for an automobile, wherein the flange has an upward angle from the horizontal. The automobile airbag device according to claim 1 or 2,
An automobile airbag device, wherein the guide plate and the flange are integrally formed with a retainer for fixing the inflator.

Images