New all-plastic miniaturized spray gun

A new all-plastic miniaturized spray gun, the body and the inner passage of the miniaturized spray gun are L-shaped, a cover is disposed on the outer diameter of the body, a piston bush is disposed in the inner ring groove at the inlet of the body, a suction pipe is provided in the inner hole of the piston bush, a large ring is provided on the outer diameter of the inlet hole of the body outward of the piston bush, a piston cavity is disposed in the piston cylinder on one side of the wrench of the body, a piston is disposed in the piston cavity of the body, the piston on one end of the piston is fit into the piston cavity of the body, the sealing blade on the outer diameter of piston is abutted against the inner diameter of the piston cavity of the body, the other end of the piston is fit and abutted against the wrench, one end of the wrench is fixed to the pins on the outer diameter on both sides of the outlet hole of the body, a plastic spring is disposed on the outer diameter of the piston cavity of the body, the plastic spring appears to be arch-bent, one end of the plastic spring is abutted against the outer diameter of the inlet hole of the body, the other end of the plastic spring is abutted against the stop rib or wrench on the outer diameter of the outlet hole of the body, a head cap is disposed in the outlet hole of the body;

• wherein the inner hole of the piston bush is provided with a lower elastic sleeve;
• the upper and lower ends of the piston cavity in the inlet hole of the body are respectively provided with an upper thru-hole and a lower thru-hole;
• an upper elastic sleeve is disposed above the inner hole of the piston bush in the inlet hole on body between the upper thru-hole and the lower thru-hole;
• the upper elastic sleeve is abutted against the piston bush and fixed in the inlet hole of the body;
• a diversion groove is disposed on the inner walls of the inlet hole on body;
• the lower thru-hole of the body is normally open;
• when the upper thru-hole of the body drives the piston to move inwardly through a wrench, the lower elastic sleeve is stressed subject to pressure change, thus controlling the opening or closure of the inlet hole on body, and the upper elastic sleeve is deformed subject to pressure change, thus opening or closing the upper thru-hole of the body.