| 摘要 |
PROBLEM TO BE SOLVED: To provide a pump dispenser which is excellent in durability, for example, capable of maintaining a function as a pump even in repeated use.SOLUTION: A pump dispenser 1 comprises: a liquid cylinder part 11; a liquid piston 23; a cylindrical plug 32 which is closed by being abutted against a communication port 35 communicating a container and the liquid cylinder part 11; an inner rod 31 whose tip end part is inserted into a plug 32 and the rear end part penetrates the liquid piston 23; and an outflow valve part 41 which is formed by a penetration part and a rear end part of the liquid piston 23 and is open by pressing down the liquid piston 23 with a nozzle part 5. An umbrella-shaped slide part 38, which is in slide-contact with an inner peripheral surface of the plug 32 while maintaining a liquid-tight state, and acts so that internal pressure of the liquid cylinder part 11 increased by pressing down the liquid piston 23 with the nozzle part 5 expands the outer diameter, is formed in the inner rod 31.SELECTED DRAWING: Figure 1 |
