Patent ID: 6030041
Filing Date: 2000-02-29
Classification: A47C

Abstract:
A back pad adjusting structure comprising a back pad, a U shape frame and a guide wire; characterized in that:the back pad is a flexible plate, the plate is slightly curved forwards, two sides of the back pad have protrusions which bend forward and then toward the center, each pair of the protrusions are opposite to one another and installed with a long hole, connection portions with screw holes are formed on the two sides of the lower end thereof, a supporting plate extending upwards is mounted on the center portion of the back pad and the top end thereof has an L shape, and a slit is formed on the center of the supporting plate and the two ends of the slit have respective pillar holes, above the supporting plate is a receiving groove opposite to the pillar hole; andthe U shape frame is formed by a U shape rod penetrating through the two ends of an inverse shape plate, the inverse U shape plate has holes with respect to screw holes;the U shape rod of the U shape frame penetrates through long holes on the upper and lower sides of the back pad so that a connection portion of the back pad with a frame plate through screws forms a back pad structure, thereby, a convex portion of another end of the guide wire passes through the pillar hole below the supporting plate, and then further passes through the slit so as to be buckled within the receiving groove so that a guide wire tube outside the guide wire resists against the pillar hole, thus a convex portion of the receiving groove and guide wire tube are aligned along a straight line, then two ends of the U shape rod are connected to the sleeve and then are bent backwards so that in the back pad, the end portion of the shape rod is firmly secured to the lower portion of a chair back of a chair, and then an adjusting button is screwedly fixed to a proper position of the chair through a tube holder, so that the arc shape of the back pad can be adjusted.