| 摘要 |
PROBLEM TO BE SOLVED: To provide a vent hole structure capable of limiting exhaust of gas by opening and exhausting gas while an internal pressure of an airbag is high, and by closing when the internal pressure becomes low.SOLUTION: A pressure receiving part 7 is provided at a circular hole 6 for a vent hole of an airbag 2, and at a connection part 8 having a restoration property for connecting between a circumference of the circular hole 6 and the pressure receiving part 7, long slits 9 which communicate the inside and outside of the airbag 2 and which are longer than the length of the connection part 8 in a direction toward the center of the circular hole 6 are formed at three or more places. Therefore, a vent hole structure can be provided which can limit exhaust of gas by opening and exhausting gas while an internal pressure of the airbag 2 is high, and closing when the internal pressure becomes low. Thus, an occupant M can be protected by receiving a load applied to the occupant M at collision time, and shortage of the internal pressure of the airbag 2 at a later stage of the collision can be prevented.SELECTED DRAWING: Figure 3 |
