EJECTION HEAD STRUCTURE HAVING EJECTION PORT-AUTOMATICALLY-CLOSING MECHANISM, DIAPHRAGM OF DIAPHRAGM-TYPE EJECTION PORT-AUTOMATICALLY-CLOSING MECHANISM OF EJECTION HEAD STRUCTURE HAVING EJECTION PORT-AUTOMATICALLY-CLOSING MECHANISM, AND METHOD FOR AUTOMATICALLY CLOSING EJECTION PORT OF DIAPHRAGM-TYPE EJECTION PORT-AUTOMATICALLY-CLOSING MECHANISM OF EJECTION HEAD STRUCTURE HAVING EJECTION-PORT-AUTOMATICALLY CLOSING MECHANISM

摘要

PURPOSE:To close an ejection port normally and open the port at the time of use to allow a fluid to eject out by making a tip of a shaft of a diaphragm freely open/close toward the ejection port. CONSTITUTION:An opening 24 provided on a rear end of an ejection head structure with a ring base 21 of a diaphragm 3 fitted is made in a two-stage structure. The ring base 21 of the diaphragm 3 is fitted into an inner stage structure of the two-stage-structured opening 24 and supported by a base supporting lid 5. The ring base 21 is supported on a part of a peripheral rim of the supporting lid 5 and also the supporting lid 5 is fitted into an outer stage structure, so that the ring base 21 is held by the inner stage structure. Normally, force is applied forward to a tip of a shaft 4 of the diaphragm 3 so that an ejection port 6 can be closed. At the time of use, pressure-applied fluid is made to flow out from an opening 2 of a pressure-applied fluid container, the diaphragm 3 is retreated to have the tip of the shaft 4 separated from the ejection port 6 to open the ejection port 6, and the fluid is ejected from the port 6.