| 摘要 |
PROBLEM TO BE SOLVED: To provide a metered-dose sprayer of syringe shape which dispenses the content in small quantities.SOLUTION: A plunger has a piston holding member 40 having a piston, and a plunger operation member 50 positioned at the rear end of the holding member. The holding member includes a holding portion body 41 for holding the piston, the holding portion body is integrally provided with a shaft 42 integrally extending backward, and a plurality of arms 43 opposed to each other across the shaft and deformed and restored, and the arm is provided with a sliding projection 44 and a locking projection 45. The operation member is formed with an inner space R2 for housing the shaft and a notch 54, the notch has a butting end surface 55 formed as a pressing surface for pressing a free end 43e of the arm, restricting the arm between the butting end surface and the syringe, and generating flexible deformation from the sliding projection. When the pressing is released, the plunger operation member is pushed back by a restoration force starting from the sliding projection elastically deformed, and the locking of the locking projection is released. |
