Patent ID: 8388244

Claim:
An elevation device of monitoring camera, serving as a coupling for securing a camera that is arranged on a top end of a high suspending post and suspended on the top end of the high suspending post with a curved arrangement of a steel cable, characterized by comprising a top retaining barrel that is fixed to the top end of the high suspending post and downward fit onto a retained member, the retained member having a bottom forming a wire box, a retained cylinder, which has an opening receiving and fixing a steel cable therein, being erected on a top center of the wire box, the retained cylinder having an outer circumference on which a plurality of locking blocks is circumferentially arranged in an equally spaced manner at a location close to the opening and at an altitude, a raised cam, which has an inclined circumferential top surface, being formed on a portion of the outer circumference of the retained cylinder between the wire box and the locking blocks, the top retaining barrel comprising a locking tube set at a center thereof, the locking tube receiving therein a toothed crown locking collar at a location corresponding to a push position of the locking blocks that is defined at the time when the retained cylinder is almost fully inserted for being driven by the locking blocks in a tooth-by-tooth fashion to slide in a single given direction so as to alternately carry out locking and unlocking operation on the locking blocks, the locking tube forming a raised guide block on an inside surface thereof at a location adjacent to a bottom opening and corresponding to the inclined lower portion of the inclined circumferential top surface, whereby when the steel cable pulls the retained cylinder upward into the locking tube, the inclined circumferential top surface is guided by the guide block to correct orientation of the retained cylinder with respect to the retaining barrel so that further pulling moves the retained cylinder to an uppermost position to be retained and locked, by which the camera is selectively and readily raised and lowered by an operator staying on ground without climbing high to proceed with maintenance and repairing of the camera.