Patent ID: 8528986
Filing Date: 2013-09-10
Classification: B60R

Abstract:
1. A vehicle seat having a seatbelt mechanism including a seatbelt and a pretensioner mechanism for actively tensing the seatbelt when strong external force acts on a vehicle body due to vehicle collision, wherein the seatbelt mechanism comprises a chip anchor disposed to one of right and left sides of a seat bottom of the vehicle seat and coupled to a tip end of the seatbelt and a tongue anchor disposed to the other of the right and left sides of the seat bottom and engaged with a tongue plate disposed to an intermediate portion of the seatbelt, and the pretensioner mechanism moves both the chip anchor and the tongue anchor to actively tension the seatbelt when the vehicle collision occurs, wherein the pretensioner mechanism has one cylinder, a piston movable in the cylinder, an expansion chamber of the cylinder partitioned by the piston, and a gas generator for supplying gas to the expansion chamber, the cylinder is coupled with one of the chip anchor or the tongue anchor through a first cable, the piston is coupled with the other one of the chip anchor or the tongue anchor through a second cable, and the cylinder and the piston are moved in an opposite direction with respect to one another by gas energy from the gas generator.