Knee airbag and occupant's leg protection system

Abstract

The present invention provides a knee air bag that can be opened up, down, left, and right very quickly, and an occupant leg protection device having the knee air bag. In the knee air bag (18), the upper part constitutes a constant width part (26) whose width in the left and right direction is substantially the same in the predetermined vertical direction width, and a narrower part (26) whose width in the left and right direction becomes smaller as it goes downward is formed at the lower side. Wide part (28). Inside the knee air bag (18) are provided with upper and lower multi-section restraint belts (30, 32) connecting the front side (18a) and the back side (18b). The restriction band (30) on the upper section side is arranged at a height near the boundary between the equal-width portion (26) and the narrow-width portion (28) or at a higher position. The restraining bands (30, 32) extend continuously in the left-right direction. Ventilation spaces (V) are respectively formed between the left and right ends of the restraint belts (30, 32) and the left and right sides of the knee air bag (18).

Description

technical field [0001] The present invention relates to a knee air bag and an occupant's leg protection device having the knee air bag, which is used to protect the occupant's calf against the interior panel in front of the seat when a car or the like collides, and is also used to restrain the knee The movement of the occupant's lower body is restrained from moving forward of the vehicle. Background technique [0002] As a protection device for the occupant's legs that protects the occupant's leg from the frontal collision of a high-speed moving object such as a car, when the occupant's lower leg hits the interior panel in front of the seat and receives a large load, it has a knee air that expands in front of the vehicle occupant's leg bag and an inflator (gas generator) for inflating the knee bag. [0003] JP-A-2003-182504 discloses a knee airbag that inflates from bottom to top in the area in front of the occupant's legs; Shape; the gas generated by the inflator is diver...

AI Technical Summary

Problems solved by technology

[0005] In the above-mentioned Japanese Patent Laid-Open No. 2003-182504, the left and right width of the uppermost section of the restraining belt is the smallest, so the outline of the uppermost chamber in the knee airbag is not obvious, and there is a disadvantage of delaying the completion of the inflation of the uppermost chamber.

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