Head-rest device for a vehicle seat

Details Head-rest device for a vehicle seat Head-rest device for a vehicle seat

1984-03-29

1986-05-20

Zugel, Francis K.

Chairs and seats

Headrest

Adjustable rectilinearly vertically

248414, 403104, A47C 738

Patent

active

045896984

ABSTRACT:
A head-rest device for a vehicle seat is disclosed in which a head-rest stay mounting a head-rest in its upper portion is supported in such a manner that it can be adjusted vertically with respect to a seat back by means of a lock mechanism provided in a head-rest holder. According to the lock mechanism of the invention, a torsion lock spring is fitted into the head-rest holder through which the head-rest stay is inserted and which is fixed to the seat back. The head-rest stay can be locked relative to the head-rest holder by means of the winding force of the torsion lock spring. An operator can be rotated to rewind the torsion lock spring so as to release such locking of the head-rest stay. Thus, it is possible to adjust the vertical position of the head-rest as required.

REFERENCES:
patent: 3230595 (1966-01-01), Kedem
patent: 3480247 (1969-11-01), Waner
patent: 3517184 (1970-06-01), Norton et al.
patent: 3603623 (1971-09-01), Widman
patent: 3856253 (1974-12-01), Seebinger
patent: 4411470 (1983-10-01), Nishimura et al.
patent: 4427233 (1984-01-01), Matumoto
patent: 4489979 (1984-12-01), Zyngier

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