| 摘要 |
PURPOSE: To prevent the sliding parts from being damaged or operating defectively by a method wherein-a watertight shielding film is spanned between a piston and the lower part of a cylinder, and a content storage chamber side which is partitioned by the watertight shielding film, and the inside of the cylinder on the opposite side are made an isolated storage space, and at the same time, a sliding part is arranged in the isolated storage space. CONSTITUTION: When a nozzle head 17 which is provided on the top of a pressurizing plunger 11 is pressed down, and a piston 10 is made to slide along a cylinder internal wall surface 7a, the piston 10 compresses a returnable spring 16, and at the same time, a watertight shielding film 15 is folded. At this time, a check valve 8 at a low location closes the lower passage of a cylinder 7, and the volume of a content storage chamber B is gradually reduced, and the pressure increases. As the result, a check valve 12 at a high location ascends while resisting to the pressing force of a spring 13, and the content in the content storage chamber B is discharged to the outside from a nozzle 18. When the pressing force to the nozzle head 17 is released, the upper check valve 12 closes, and in the meantime, the lower check valve 8 opens, and for this reason, the content is sucked in from a pipe 9 to the content storage chamber B. |
