| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact dispenser which has high precision in a dispensation amount without reference to whether a dispensation amount is small or large over a wide dispensation amount range although having a single cylinder mechanism.SOLUTION: A dispenser has a cylinder unit including a cylinder mechanism including a cylinder and a piston, and the cylinder mechanism includes a large-diameter cylinder member having an opening for suction discharge at a lower end, a small-diameter cylinder member which is inserted slidably into the large-diameter cylinder member, and has an opening for suction discharge at a lower end, and a piston member which is inserted slidably into the small-diameter cylinder member. In a small-capacity dispensation mode, the piston member is driven to move inside the small-diameter cylinder member fixed to the large-diameter cylinder member in one body. In a large-capacity dispensation mode, the piston member and the small-diameter cylinder member fixed thereto in one body are driven to move inside the large-diameter cylinder member. |
