| abstract |
A syringe with which an accurate amount of a liquid can be discharged by a simple operation. n The syringe 1 includes an outer tube 2 , a gasket 3 slidable in the outer tube 2 , a pusher 4 operable for moving the gasket 3 , and a stopper 5 disposed to be slidable along the longitudinal direction of the pusher 4 . The stopper 5 is fixed relative to the pusher 4 by the engagement of engaging portions, provided therein, with racks 47 a, 47 b formed on the pusher 4 . When an operating portion 71 is depressed, the fixation condition is released, permitting regulation of the position of the stopper 5 on the pusher 4 . When the depression on the operating portion 71 is canceled, the fixation condition is retained. When the pusher 4 is pressed in the tip end direction, a tip end face 66 of the stopper 5 comes into contact with a base end portion 28 of the outer tube 2 , whereby the depth of insertion of the pusher 4 into the outer tube 2 is restricted, and a set amount of a chemical 100 is discharged through a diameter-reduced portion 22. |