Shock energy absorbing mechanism in tilt lock device

Abstract

Disclosed is a tilt lock device for a passenger seat used for a vehicle, ship or air plane, which has a seat back (1) mounting a shoulder harness (12). It includes a base frame (5) having a pair of right and left spreaders (6) composed of front side supporting portions (6a) hung substantially in the horizontal direction between front and rear beams (3)(4), and rear side supporting portions (6b) projecting so as to be tilted upward from the rear portions of the front side supporting portions (6a), wherein the lower end portions of seat back frames (2) are rotatably supported on the rear side supporting portions (6b) of the spreaders (6). In the base frame (5), a bearing portion (2b) is formed on the base frame (5) side upward from a seat back frame (2) rotatably supporting portion with respect to the rear side supporting portion (6b) of each of the spreaders (6); an arm (13 ) is fixed at a rear end of the front side supporting portion (6a) of the spreader (6); a guide hole (14) is perforated on the upper portion of the arm (13) in such a manner as to face to the bearing portion (2b) formed on the seat back frame (2); and a damping structure (16) is formed within the guide hole (14) and a lower end portion (15b) of a lock/lever (15) having an upper end side (15a) turnably fixed on the bearing portion (2b) of the seat back frame (2) is inserted in the guide hole (14) through the damping structure (16).

Dependencies are inferred from the claim text.