Patent ID: 8777317
Filing Date: 2014-07-15
Classification: B60N

Abstract:
1. An armrest device, comprising: a stationary shaft, which is fixed to a seat frame; an armrest body into which the stationary shaft is inserted, and which is rotatably supported by the stationary shaft, a lock spring made of a coil spring having a coil part that is tightly wound around the stationary shaft, with one end of the coil spring serving as a stationary-side hook that is locked to the armrest body and whose other end serves as a free-side hook; a plate projecting from the armrest body, and having a hook-supporting part that supports the free-side hook in a condition so that the free-side hook is raised in a direction away from the coil part in an axial direction of the stationary shaft, and a hook-fitting part that maintains a diameter-enlarged condition of the coil part due to dropping down of the free-side hook in a direction approaching the coil part in the axial direction of the stationary shaft by a reaction force to the free-side hook raised on the hook-supporting part; a cam member provided on the stationary shaft and having an unlocking cam part for dropping down the free-side hook into the hook-fitting part from the hook-supporting part when the armrest body is rotated in an accommodating direction, and a relocking cam part for raising the free-side hook from the hook-fitting part and causing the hook-supporting part to support the free-side hook when the armrest body is rotated in the armrest-use direction.