Pretensioner for seat belt

摘要

A pretensioner for a seat belt is configured to reduce injury by preventing load applied to the passenger's chest from increasing may include a pinion connected to a cylindrical spool wound with a webbing, a cylinder receiving a rack engaged with the pinion, a micro gas generator disposed in the cylinder and rotating the pinion by moving the rack with an explosion due to an external shock, a generator cap covering the outer circumferential edge of the cylinder and preventing the micro gas generator from separating outside, and a guide blade that guides gas discharged through vent holes to the outside is formed on the outer circumferential edge of the micro gas generator.

主权项

1. A pretensioner comprising:
a pinion connected to a cylindrical spool wound with a webbing of a seat belt; a rack piston operably engaged with the pinion; a gas cylinder telescopically receiving the rack piston; a micro gas generator fluidly connected to the gas cylinder to move the rack piston and rotate the pinion with an expansion of gas generated by the MGG; and a generator cap enclosing the micro gas generator therein and connected to the gas cylinder; a guide blade formed on an outer circumference of the micro gas generator to guide gas discharged from the gas cylinder; and vent holes formed on the generator cap for discharging the gas in the gas cylinder along the guide blades to the outside.