G - Physics – 06 – F
Patent
G - Physics
06
F
G06F 1/16 (2006.01) A47B 21/03 (2006.01)
Patent
CA 2117169
A manually repositionable support arm mountable on a support structure for movement of a keyboard tray between a plurality of work positions is disclosed. The device comprises a mounting frame, a first roller member that is rigidly mounted on the mounting frame in fixed relation thereto, and a second roller member that is rigidly mounted on a depending portion of the keyboard tray in fixed relation thereto. A rigid housing substantially encases the first and second roller members in journalled relation about respective first and second circumferential bearing surfaces on the first and second roller members so as to hold the first and second roller members in fixed spaced relation to one another and so as to permit relative rotation of the housing with respect to the first and second roller members. A constant length closed-loop band is operatively mounted around both of the first and second roller members in fixed indexed engagement therewith so as to surroundingly link the first and second roller members for planetary movement of the second roller member about the first roller member within the rigid housing, such that the second roller member remains substantially rotationally aligned with respect to the first roller member. A lock is operatively mounted between the second roller member and the rigid housing member to selectively preclude the relative rotation of the second roller member with respect to the rigid housing, which, in turn, selectively locks the keyboard tray in any one of said plurality of work positions.
Cette invention concerne un bras support à positionnement manuel à monter sur une structure pour permettre le réglage d'un plateau porte-clavier entre plusieurs positions de travail. L'objet de l'invention comprend une ferrure de montage, un premier rouleau solidaire de la ferrure de montage, un second rouleau solidaire d'une pièce faisant saillie sous le plateau porte-clavier. Une enveloppe rigide recouvre sensiblement complètement les deux rouleaux susmentionnés, tourillonnée sur les portées circulaires respectives des deux rouleaux de façon à maintenir un écartement constant entre eux tout en pouvant tourner par rapport à ceux-ci. Une bande sans fin de longueur constante est montée autour des deux rouleaux de façon à être tendue entre eux et les recouvrir pour éviter le désaxement du second rouleau par rapport au premier rouleau lorsque le second est animé d'un mouvement de rotation planétaire autour du premier, à l'intérieur de l'enveloppe rigide. Un verrouillage est prévu entre le second rouleau et l'enveloppe rigide pour empêcher, à volonté, la rotation du second rouleau par rapport à l'enveloppe rigide, ce qui a pour effet de bloquer le plateau porte-clavier à la position de travail choisie.
Mcintosh Lawrie
Hofbauer Patrick J.
Waterloo Furniture Components Limited
LandOfFree
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