Patent ID: 7198326
Filing Date: 2007-04-03
Classification: A47B,A47C

Abstract:
1. A desk and chair interchangeable device comprising: a first plate, wherein as the desk and chair interchangeable device is used as a chair, the first plate is used as a vertical backrest; a second plate, wherein as the desk and chair interchangeable device is used as a chair, the second plate is used as a seat portion; a supporting unit having a first frame, and a second frame and a bearing frame for connecting the first frame and the second frame; and the first frame being formed by two legs and a transversal bar connected the two legs; and the second frame being formed by two legs and a transversal bar between the two legs; a pivotal unit formed by a first pivotal seat, a second pivotal seat and a linkage; the first pivotal seat serving to pivotally connect one end of the linkage and the first plate; the second pivotal seat serving to pivotally connect another end of the linkage and the second plate so that the first plate is pivotally rotatable; and an adjusting unit installed on the first plate for connecting the first plate to the first frame; wherein the adjusting unit serves to adjust the elevation of the first plate; the pivotal unit serves to pivotally rotate the first plate to a horizontal position to be as a table plate and is positioned by the adjusting unit; and the second plate is motionlessly fixed to the supporting unit for receiving objects: wherein the first pivotal seat includes a first seat, a sleeve connected to the first seat; and a second seat connected to a first end portion of the linkage; the first seat is engaged to the first plate near the corner of the second plate by using positioning screws; a surface of the sleeve has a pivotal hole facing toward a body of the linkage; the second seat is pivotally installed with a pivotal shaft at a position facing the pivotal hole; the pivotal shaft passes through the pivotal hole so as to have a pivotal rotation between the first plate and the linkage.