Cover opening structure of medicament barrel

The utility model relates to the technical field of manufacturing industry, in particular to an uncovering structure of a medicament barrel. The device comprises a medicament barrel, the upper end of the medicament barrel is in threaded connection with a cover, the upper side of the medicament barrel is provided with an operating rod, one side of the operating rod is fixedly connected with a second mounting block, the other side of the operating rod is provided with a rectangular groove, a lead screw is rotatably connected in the rectangular groove, and the circumferential side of the lead screw is in threaded connection with a lead screw nut. A first mounting block is fixedly connected to one side of the lead screw nut, a telescopic rod is fixedly connected to one side of the operating rod, and a plurality of gear teeth are arranged on one side of the first mounting block and one side of the second mounting block. The screw rod is matched with the first mounting block, so that the first mounting block can mo