Patent ID: 9724714
Date: 2017-08-08
CPC Classifications: B05B

Claim:
1. A foam discharge device comprising: a pump having a stem downwardly movably erected at a mouth section of a container main body in which a liquid is accommodated in an upwardly biased state, and a pressing head disposed at an upper end section of the stem and in which a nozzle hole is formed; and a mounting cap configured to mount the pump on the mouth section of the container main body, and configured to foam and discharge the liquid in the container main body from the nozzle hole, wherein the pump is provided with: a piston for a liquid linked to the stem; a cylinder for a liquid in which the piston for a liquid is vertically slidably accommodated; a piston for air linked to the stem; a cylinder for air in which the piston for air is vertically slidably accommodated; and an air-liquid mixing unit configured to mix a liquid from the cylinder for a liquid and air from the cylinder for air to foam the liquid, the cylinder for air is disposed inside the mounting cap and accommodated in the container main body, a head-section-side cylinder for air into which a piston tube section erected at a ceiling wall section of the mounting cap is vertically slidably fitted extends from the pressing head, and a communication path configured to bring the inside of the head-section-side cylinder for air and the inside of the cylinder for air in communication with each other is formed at the pump, wherein the pump is configured to supply the air in the head-section-side cylinder for air into the air-liquid mixing unit through the communication path when the pressing head is pushed down, the pressing head is provided with an outer tube section extending downward and dividing the head-section-side cylinder for air, and the piston tube section comprises a piston member having an outer circumferential edge vertically slidably fitted into an inner circumferential edge of the outer tube section.