Patent ID: 7976066
Filing Date: 2011-07-12
Classification: B60R

Abstract:
1. A seat belt pretensioner device comprising: a cylinder; a piston slidably disposed in the cylinder; a gas generator installed to rear end portion of the cylinder and configured to supply a propellant gas to the piston for moving the piston in a forward direction; a first direction conversion unit disposed between the gas generator and the piston and connected to the cylinder; a coupling member for coupling a seat belt and the piston, wherein a portion of the coupling member is engaged with the first direction conversion unit so as to change a movement direction of the coupling member while the piston moves in the forward direction; a reward movement restriction member configured to restrict a rearward movement of the piston while the piston moves in the forward direction by the propellant gas of the gas generator; and a second direction conversion unit installed to a bracket connected to a front end portion of the cylinder and the other portion of the coupling member is engaged with the second direction conversion unit so as change the movement direction of the coupling member.