| 摘要 |
A discharge pump equipped with a push-down head of the type in which a nozzle is opened and closed by advancing and retracting a valve rod member by a lever member and a first pressing means, wherein a second pressing means is provided between the base and the tip of the valve rod member to prevent back flow of air. A push-down head type discharge pump has a head body (24) configured by providing a liquid flow pipe (36) to the lower surface of a laterally facing cylinder section (30) so as to extend vertically downward from the lower surface, the liquid flow pipe (36) communicating with a stem (6) of a discharge pump, the cylinder section (30) having a nozzle (34) opened at the front thereof. When the head body (24) is pushed down, a valve rod member (52) mounted in the cylinder section (30) is advanced and retracted. The valve rod member (52) is composed of the base (58) and the tip (66), and a second pressing means (70) is mounted between the base (58) and the tip (66). |
