| 摘要 |
Disclosed is a dispenser which has a piston attached to its head and a cylinder attached to its cap and which is constructed so that it may be fitted onto a vessel through the cap and so that it may, in accordance with the sliding movement of the piston, suck up a liquid in the vessel into the cylinder through a primary valve and pressurize the liquid to cause the same to issue outside the dispenser through a secondary valve. The dispenser has a child-proofing mechanism including a protruded portion formed on the cap and having an engagement groove and an engagement projection formed on the inner wall surface of the head and, by being rotated with the piston located at its depressed position, engaged with the engagement groove of the protruded portion to lock the piston made integral with the head to its depressed position. An engagement projection or engagement groove is formed on or in the outer wall surface of the cap. An engagement groove or engagement projection is formed in or on the head engageably with the engagement projection or engagement groove of the cap. The dispenser has a mechanism for preventing the rotation and rising movement of the head, formed on a virgin seal removably disposed between the cap and the head.
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