| 摘要 |
PURPOSE:To reduce number of members and to absorb processing error and assembly error by providing a slit whose end portion in the primary valve direction is opened on a valve holder and forming the valve holder integratedly with a piston so that it can be expanded outward in the radius direction of the piston. CONSTITUTION:When a pump mechanism 10 is not used, a piston 14 is locked to the pressing position. For example, after incorporating the pump mechanism 10 in a dispenser, the piston is locked to the pressing position by utilizing engaging projections 56, 58 respectively formed on a cap stopper 54 and a head 50. And a valve holer 45 on the lower end of the piston 14 is pressed to a primary valve 22. In this case, a slit 47 is opened on the end portion of the valve holder 45 in the primary valve 22 direction. Then the valve holder 45 is expanded outward in the radius direction of the piston 14 while pressing the primary valve 22, and processing and assembly errors can be absorbed even if they are in respective composing members and the primary valve 22 can surely the pressed. |
