A - Human Necessities – 47 – C
Patent
A - Human Necessities
47
C
A47C 7/36 (2006.01) A47C 7/40 (2006.01) B60N 2/02 (2006.01)
Patent
CA 2228576
A mechanism is provided for adjusting the height of the backrest (10) relative to a chair seat. The adjustment mechanism for releasably retaining the backrest (10) in a plurality of selected positions relative to a seat permits the chair to be shipped in a "knocked down" condition and easily assembled by the consumer. The adjustment mechanism includes a channel member (30) that is secured to the backrest, and a support member (40) carried by the chair that is slidably received in the channel member (30) and rigidly locked in selected positions. The support member (40) has vertically aligned rack teeth (72, 74) and the backrest has a movable catch (48) having pawls (52, 54) that are adapted to engage the rack teeth (72, 74). Movement of the catch (48) places the pawls (52, 54) into engagement with the rack teeth (72, 74) to prevent the downward movement of the backrest (10) from a selected vertical position.
Ce mécanisme, qui permet de régler la hauteur du dossier (10) d'un siège, permet de placer ce dossier (10) de façon réversible en diverses positions et d'expédier le siège sous forme de pièces séparées faciles à monter par le consommateur. Ce mécanisme de réglage comprend un guide (30) fixé au dossier, ainsi qu'un support (40) reposant sur le siège et conçu pour coulisser dans le guide (30) et se verrouiller dans des positions sélectionnées. Le support (40) comporte des dents (72, 74) alignées verticalement sur une crémaillère et le dossier présente un butoir mobile (48) doté de cliquets (52, 54) conçus pour entrer en prise avec les dents de crémaillère (72, 74). Le déplacement du butoir (48) place les cliquets (52, 54) en prise avec les dents de crémaillère (72, 74) pour empêcher le dossier (10) de descendre au-dessous d'une position verticale sélectionnée.
Cassan Maclean
Herman Miller Inc.
LandOfFree
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