Headrest lock structure with lock slots, method for forming...

Details Headrest lock structure with lock slots, method for forming... Headrest lock structure with lock slots, method for forming...

2006-10-17

2006-10-17

Cuomo, Peter M. (Department: 3636)

Chairs and seats

Headrest

Adjustable rectilinearly vertically

Reexamination Certificate

active

07121626

ABSTRACT:
A headrest lock structure has a plurality of lock slots formed in a line along the axial direction of a cross-sectionally circular headrest pole and a lock plate is adapted to fit into one of the lock slots. Each lock slot has a bottom surface protruding in an arc within a region concaved from the outer peripheral surface of the headrest pole by a given distance, and a side surface formed on at least one of the sides of the bottom surface in the axial direction of the headrest pole to extend at approximately a right angle with the bottom surface. The lock plate has an arc-shaped concave portion corresponding to the profile of the bottom surface of each lock slot, and a flat portion corresponding to the side surface of each lock slot. The headrest lock structure can reliably prevent unintentional release of headrest lock.

REFERENCES:
patent: 3498672 (1970-03-01), Leichtl
patent: 5934755 (1999-08-01), Halamish
patent: 6454356 (2002-09-01), Yamada
patent: 33 14 443 (1984-10-01), None
patent: 0 798 157 (1997-10-01), None
patent: 2003-009992 (2003-01-01), None
patent: WO 03/064205 (2003-08-01), None
patent: WO 2003064205 (2003-08-01), None

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