Head restraint adjustment mechanism

Details Head restraint adjustment mechanism Head restraint adjustment mechanism

1992-04-06

1992-10-20

Brown, Peter R.

Chairs and seats

Headrest

Adjustable rectilinearly vertically

A47C 736

Patent

active

051564408

ABSTRACT:
An adjustment mechanism for a vehicle head restraint assembly is disclosed in which the head restraint pad is supported on one or more posts having a plurality of V-shaped detent notches for engagement by a wire spring to hold the head restraint pad in place. The posts fit into guide bushings which contain a flange enclosing a wire spring, a portion of which engages the notches during normal use to prevent unwanted movement of the head restraint pad while allowing vertical adjustment of its position. The spring and flange are constructed to distribute loads arising from adjustment of the head restraint pad to both sides of the spring, resulting in a relatively even distribution of the forces acting on the spring during adjustment and providing the spring with a longer fatigue life.

REFERENCES:
patent: 4527834 (1985-07-01), Zyngier
patent: 4577904 (1986-03-01), Wiese et al.
patent: 4844545 (1989-07-01), Ishii
patent: 4976493 (1990-12-01), Frankila

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