Adjustable headrest

Chairs and seats – Headrest

Patent

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Details

297410, A47C 736

Patent

active

044899793

ABSTRACT:
The headrest is adjustably mounted by a molded plastic guide inserted through an aperture of the mounting bracket concealed in the seat back and having a tubular body with a central bore therethrough for receiving the support post of the headrest. Flexure fingers are molded integrally with the tubular body and have a free state radially contracted position partly obstructing the central bore. One or more locking abutments are provided on the outside of the flexure fingers and are radially contracted therewith to facilitate insertion of the tubular guide through the mounting bracket aperture. Upon insertion of the headrest post the flexure fingers are forced radially outward to lock the locking abutments with the mounting bracket. The forced radial outward flexure of the flexure fingers induces a radial inward bias by which the flexure fingers frictionally engage and maintain the support post at a selected vertically adjusted position relative the seat back. The support post has a necked down central portion defining a stop face. A flange molded integrally with the plastic guide overlies the top of the seat back and defines a recess opening which cages a retainer spring seating within the necked down central portion for engagement by the stop face to limit the adjusting movement of the headrest.

REFERENCES:
patent: 3511535 (1970-05-01), Gunlock
patent: 3512832 (1970-05-01), Kage
patent: 3544162 (1970-12-01), Uchiyamada
patent: 3563603 (1971-02-01), D'Aprile
patent: 3567282 (1971-03-01), Ohta et al.
patent: 3574398 (1971-04-01), Hairgrove
patent: 3608965 (1971-09-01), Cziptschirsch
patent: 3635527 (1972-01-01), Weber
patent: 3904241 (1975-09-01), Makinen
patent: 4111483 (1978-09-01), Jaeger
patent: 4411470 (1983-10-01), Nishimura et al.

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