Easily disassembled and assembled structure of hard disk for all-in-one machine

A hard disk mounting bin is formed in the all-in-one machine, the surface of the all-in-one machine is provided with a hard disk mounting port at the position of the hard disk mounting bin, a U-shaped groove is formed in the hard disk mounting bin, an opening of the U-shaped groove faces the hard disk mounting port, the U-shaped groove is used for placing a hard disk, and the hard disk can slide along the U-shaped groove. The mounting bin is provided with a communication socket which is located at one end of a sliding path of the hard disk for inserting the hard disk; a bin cover detachably covers the hard disk dismounting and mounting opening, and when the bin cover covers the hard disk dismounting and mounting opening, the side, facing the hard disk mounting bin, of the bin cover abuts against the hard disk; a limiting piece is convexly arranged on one side, facing the hard disk mounting bin, of the bin cover, and when the bin cover covers the hard disk dismounting port, the limiting piece is clamped at one