Patent ID: 8029057
Filing Date: 2011-10-04
Classification: B60N

Abstract:
1. A clutch mechanism for a vehicle seat comprising: a pressure receiving member that is pivotably connected to a frame of a seat back; a coupling arm that is pivotably connected to the pressure receiving member, wherein the coupling arm is provided with a weight and receives an occupant's backrest load via the pressure receiving member, and the occupant's backrest load received and inertia force applied to the weight in the event of a rear-end collision of the vehicle cause the coupling arm to move in the event of a rear-end collision of a vehicle; and a swing member that is pivotably connected to the frame of the seat back and that is pressed by the coupling arm to pivot, wherein the swing member has a first arm receiving a first backrest load via the coupling arm and a second arm receiving a second backrest load, which is larger than the first backrest load, via the coupling arm, the first and second arms are set so that a maximum pivot amount of the swing member when the first arm is pressed to pivot is equal to a maximum pivot amount of the swing member when the second arm is pressed to pivot.