Patent ID: 8070222

Claim:
A headrest device for an active headrest, comprising: an ascent/forward tilting mechanism which performs upward ascent movement and forward tilting, in an advance direction of a vehicle, of the headrest, said ascent/forward titling mechanism including: an upper unit provided in a seat including: a substantially rectangular upper unit body; supporting arms supporting headrest brackets pivotally mounted on said upper unit body; a sheath pipe vertically provided at the center of said upper unit body, said sheath pipe having a generally tubular structure; a lifter capable of elevation and forward tilting, said lifter including a lifter guide movable into or out of said sheath pipe, and a connecting portion vertically provided at both ends of said lifter and locked to said headrest brackets; a lifter regulating lever which elevates and lowers within said sheath pipe; and a pulley provided in an upper portion of said upper unit body, a first wire having a first end linked to said lifter; a lower unit linked to a second end of said first wire and provided in the seat, said lower unit including: a lower unit movable body; a cam plate pivotally mounted on said lower unit; and an operating arm, a locking/unlocking device provided in the vehicle to unlock/lock said first wire, said locking/unlocking device including a collision sensor provided in the vehicle and at least one of a solenoid or a fastening mechanism, and a headrest device which is ascended and tilted forward by said ascent/forward tilting mechanism, said headrest device including: said headrest brackets provided in said upper unit; a headrest support fitted into said headrest brackets; a headrest stay loosely fitted into said headrest support; and a headrest provided on said headrest stay, wherein said lifter is operated via said first wire to cause ascent and forward tilting of said headrest brackets and said headrest.