Introduction:
Seatbelt gas inflator ignitor is mainly composed of an ignition device, an ignition device seat, an ignition powder, a gas-producing powder chamber, and a gas-producing powder. When the car is subjected to a strong collision, the gas generator in the pre-tensioned seat belt will receive a signal from the control unit; the signal activates the ignition device, ignites the ignition powder, and then ignites the gas-producing powder in the gas-producing chamber , The gas producing medicine produces a large amount of gas, which sprays the bottom of the gas producing medicine chamber. A "m"-shaped groove is punched out of the bottom of the gas generating chamber to facilitate the generator to break open from here.
A large amount of gas rushes into the elbow connected to it from the nozzle of the generator, pushes the steel ball in the elbow to move, and finally acts on the retractor, thereby tightening the seat belt. The tightened seat belt secures the occupant on the seat so that the occupant will not have a large displacement, avoiding collision with the steering wheel in the car, etc., thereby protecting the safety of the occupant.
Ⅰ. Specific embodiment
1, The present embodiment gives a Seatbelt gas inflator ignitor of a seat belt pretensioner
2.During actual operation, the base 2 and the tube housing 5 are sealed with a first 0-shaped rubber
—All sealing points are sealed with 0-shaped rubber sealing ring, which is simple and easy to one operate, and effectively avoid the environmental pollution of traditional coating and glue sealing, and it is difficult to achieve automation.
—Shell 2 contains only nitrocellulose gas 7, which is 0.5g~2.0g.
—The end of the tube shell 2 is thinning, so that the high temperature and high pressure gas generated by the gas generator ignition can quickly break through the weakness, so that the high temperature and high.pressure gas can be concentrated in only one direction. At the same time, it effectively prevents the tube shell 2 when the gas generator ignition breaks, the debris from flying around.
The Seatbelt gas inflator ignitor of the seat belt pretensioner made in this embodiment has specific parameters like :
Interface dimension
Total product high : open three 31.3mm ± 0.55mm
Product diameter : base 2 outer diameter " by) =16.9±0.Imm; outer diameter of pipe shell =1.7±0.1m;
2,electrical performance
2.1 Resistance:2.15Q±0.350
2.2 Insulation resistance:100MQ/500V,2s
2.3 Full fire current:0.8A 2ms.
2.4 No-fire current:0.2A/10s.
3,functional features
3.1 envoy of ambient temperature / degree-35℃~+85°C.
3.2 During P-t curve testing in a 10ml containment box (Figure 2).Igignition time
is not 2ms.Peak time of 8ms.~1Ams, bee pressure 65MPa~85MPa
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