Patent ID: 6766995
Filing Date: 2004-07-27
Classification: F16M

Abstract:
An adjusting device adapted to a stand, the adjusting device comprising:a three-part telescoping post (30) composed of an outer post (31), a middle post (32) slidably inserted into the outer post (31), an inner post (33) slidably inserted into the middle post (32) and a gap defined between the middle post (32) and the inner post (33); a primary actuator (10) with inner cavity attached at a joint between the outer post (31) and the middle post (32) and having a top face, a bottom face, two side faces, a drive hole (111) defined in one side face, a locking hole (112) defined in the other side face of the primary actuator (10), and a post hole (13) defined longitudinally inside the primary actuator (10) from the top face to the bottom face; a secondary actuator (20) with an inner cavity attached to a joint between the middle post (32) and the inner post (33) and having a top edge, a bottom edge, an upper hole (22) defined in the top edge, a lower hole (222) defined in the bottom edge to align with the upper hole (22), a post passage defined inside the inner cavity between the upper hole (22) and the lower hole (222), and a pair of first guide rollers (23) respectively mounted inside the inner cavity at opposite sides beside the post passage; a driving device (40) mounted in the primary actuator (10) and having: a driver (41) with multiple sprockets rotatably secured inside the primary actuator (11); a worm gear (42) penetrating into the primary actuator (11) via the drive hole (111) to engage and drive the driver (41); and a crank (43) attached to the worm gear (43) to drive the worm gear (42) to rotate, wherein the outer post (31) with a top end and a bottom end (34) is firmly mounted inside the post hole (13) at the top end; the middle post (32) with a top end penetrates through the post hole (13) and firmly attached to the secondary actuator (20) at the top end and having multiple sprocket holes (322) defined on the middle post (32) to engage the sprockets of the sprocket wheel (413) of the drive assembly (40); and the inner post (33) with a bottom end (331) extends through the passage in the secondary actuator (20); a cable (35) attached to the bottom end (34) of the outer post (31), passing through the gap between the middle post (32) and the inner post (33) to reach the secondary actuator (20), reeving around one of the first guide rollers (23), attached to the bottom end (331) of the inner post (33) by means of penetrating through the gap, diametrally passing through bottom (331) of the inner post (33) and the gap between the middle post (32) and the inner post (33) to reach the secondary actuator (20), reeving around the other first guide roller (23), passing through the gap again and attached to the bottom end (34) of the outer post (31); and a locking assembly mounted on the primary actuator (10) to selectively fasten the middle post (32) of the three-part telescoping post (30) via the locking hole (112).