| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid discharge nozzle capable of being simply used, low in a production cost, and suitable for dispensing the constant quantity of a high viscous product. SOLUTION: The liquid discharge nozzle which is mounted to a container containing cosmetics or the like is provided with a liquid discharge cavity communicating with the container through an inlet port. The cavity is made movable between a first position and a second position where the cavity accounts for a minimum volume, and is partly defined by a first and a second pistons which are slidable in a fixed main body. The first piston is fixed to a movable closing member with respect to the second piston, and a discharge port of the liquid discharge cavity, which is defined by the second piston, is made closable and openable. In the first moving step of the liquid discharge cavity, the first piston is made to be driven by the second piston due to a product pressure which acts on the second piston and, in the second moving step of the liquid discharge cavity, the first piston is made to be driven by the product pressure which acts on the first piston while the second piston is made unmovable in the second moving step of the liquid discharge cavity.
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