The existing medical, agricultural, or cosmetic sprayers are mainly composed of a diffusion cover, a suction pump, a one-way valve, a suction pipe, and an outer tube. a lock cover is fixed at the downward opening of the jacket, and the lock cover has a through hole at the opening corresponding to the jacket, the inner diameter of the through hole is smaller than the inner diameter of the jacket, the jacket has built-in glass beads, and the outer diameter of the glass beads is larger than the lock cover The inner diameter of the through hole, the glass beads and the through hole of the lock cover constitute a one-way valve; a hole is opened on the right angle channel of the outer casing between the diffusion cover and the one-way valve to communicate with the suction pump; the piston in the suction pump is connected with a wrench , one end of the wrench is connected with the column shaft provided on the jacket; the liquid inlet under the lock cover is connected with a suction pipe, and the suction port of the other end of the suction pipe extends into the bottom of the bottle containing the sprayed liquid, so as to ensure that the sprayer can spray as much as possible. All the liquid in the bottle is sprayed out. When in use, press the wrench to make the piston in the suction pump reciprocate, suck the liquid from the bottle and spray it out of the diffusion cap.
There is no spring between the piston and the cylinder in the suction pump of this sprayer. Because the metal spring is in direct contact with the liquid in the bottle, which is easy to rust and contaminate the liquid in the bottle.