S valve structure for accumulator spray

A second valve structure in an accumulator sprayer to be attached to a container to suction liquid in the container from an introduction tube via a first valve into a main cylinder portion, apply pressure to the liquid in the main cylinder portion and, when the pressure exceeds a certain pressure eject the liquid via a second valve structure from a nozzle portion, wherein

• the second valve structure is formed of a spring portion and a valve piston portion drooping from the spring portion, and the valve piston portion includes a core rod portion, an outer skirt portion extending downward from an outer circumference of the core rod portion and an inner skirt portion extending downward from the outer circumference of the core rod portion and extending longer than the outer skirt portion, wherein the valve piston portion is configured to be placed in a sub-cylinder portion having a circular hollow space surrounded with an inner circumferential wall of the sub-cylinder portion, the sub-cylinder portion extends in an up-down direction, and the valve piston portion is configured to slide inside the sub-cylinder portion in the up-down direction between a closed state in which the valve piston portion is in the sub-cylinder portion and an open state in which the valve piston portion is out of the sub-cylinder portion,
• the valve piston portion has an upper flange portion that protrudes radially from the core rod portion,
• in the closed state, the upper flange portion is positioned inside the sub-cylinder portion to prevent the valve piston portion from swaying in a lateral direction, which is perpendicular to the up-down direction, by contacting the inner circumferential wall of the sub-cylinder portion, and
• in the open state, the upper flange portion is positioned out of the sub-cylinder portion.