Fixing device

A fixing device comprising a fixing assembly, a first plate and a second plate, wherein:

• the fixing assembly comprises a sleeve, an outer casting tube, a head part, a resilient component and a fastener, said sleeve has a through hole inside and cut therethrough, and has a plurality of grooves recessed on an outer surface thereof and arranged with equal interval, and a positioning part disposed on a bottom side thereof, and wherein said outer casting tube is disposed at a top of said sleeve and has a receiving space inside for insertion of said sleeve, and said receiving space is formed with at least one longitudinal protrusion rib disposed on an inside wall thereof and slidable in the plurality of grooves, and wherein said head part is disposed inside the receiving space of said outer casting tube and has a mounting hole formed at a central part thereof and cut therethrough, and said resilient component is abutted between said head part and said sleeve, and said fastener is disposed under said sleeve, inserted into said through hole and fixed on said head part, and said fastener has a riveting part mounted in said mounting hole, and a rod extended from a bottom thereof and inserted through said through hole, and wherein said rod has longitudinal sections formed on two opposite sides of the outer surface thereof and cut therethrough, and said fastener has arc surfaces formed on other two opposite sides of the outer surface thereof, and said rod has a stop part outwardly protruded on a bottom side thereof, and said stop part has a guiding incline formed at a top thereof;
• wherein said first plate has a hole for fixation of said positioning part of said sleeve;
• and
• wherein said second plate is placed in parallel to said first plate and has a cut groove cut through and having a tapered shape from outside of a side of said second plate for insertion of said fastener, and said cut groove has a narrow portion formed at an end thereof and configured to be blocked by said arc surfaces for rotation of said outer casting tube, and said narrow portion has a fastening hole extended from a side thereof and configured for insertion of said rod, and said fastening hole has a gradually-extended incline formed on a sidewall thereof remote from said first plate and configured for return of said stop part, and said second plate has a supporting surface formed on ends of two side surfaces of said cut groove and tapered outwardly, and configured to push said guiding incline of said stop part to extend said rod out of said through hole of said sleeve.