Accumulator sprayer

An accumulator sprayer comprising parts made of polyolefin material, wherein the parts include:

• a nozzle portion;
• a base portion containing a first passage portion having a sub-cylinder portion located above and a main cylinder portion located below, and connecting a container to the main cylinder portion, a second passage portion connecting the main cylinder portion to the sub-cylinder portion, and a third passage portion connecting the sub-cylinder portion to the nozzle portion;
• a piston portion that slides within the main cylinder portion;
• a trigger portion that pivots around a support shaft portion, formed protrusively on a side surface of the base portion, as a fulcrum and slides the piston portion rearward;
• a trigger-returning spring that returns the trigger portion forward;
• a first valve provided in the first passage portion;
• a second valve structure mounted in the sub-cylinder portion;
• an introduction tube that suctions up and passes through the liquid from the container;
• a cover portion that covers the base portion from above;
• a cap portion for attaching to the container;
• and a packing for sealing the cap portion and the base portion.