Metallic ring threaded shank blocking device for seat of motor vehicle, has reinforcement piece uncovering part of vertical zone of edge such that shank is in support against part, where piece is realized in same material of return unit

摘要

The device (1) has a box (4) including a blocking edge (5) cooperating with a notch (6) of a shank (2) to block the shank in a sliding manner. The box is restrained in translation towards a reception sleeve (3) by an elastic return unit (9) i.e. spring, to enable cooperation between the edge and the notch when the edge and the notch are against each other. A reinforcement piece (11) i.e. profile, is arranged for uncovering a part (12) of a vertical zone (7) of the edge such that the shank mounted in the device is in support against the part. The piece is realized in same material of the unit.