Patent ID: 7980519

Claim:
A telescopic adjustable positioning device comprising: an outer sleeve having a via hole; a telescopic tube slidably accommodated into the outer sleeve and having a plurality of positioning holes in a row; a retaining seat, being a hollow tube, and fastened at one end of the outer sleeve for enclosing a junction of the outer sleeve and the telescopic tube, and one side of the retaining seat being formed with a projecting portion; a slot, being formed in the projecting portion, and an inner end of the slot having a through hole which is smaller than the slot in size; a pin, passing through the slot and the through hole of the retaining seat and the via hole of the outer sleeve to be selectively inserted into one of the positioning holes of the telescopic tube, and having a flange; a first spring put around the pin and between the flange and the inner end of the slot, wherein a diameter of the first spring is greater than that of the through hole; and an operation unit, operatively assembled in the projecting portion of the retaining seat, having a track for pushing the pin to move toward the positioning holes; wherein the retaining seat has a body and a toggle, the body is received in the outer sleeve, and the toggle is exposed.