| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an injector quantitatively discharging a small amount of content. <P>SOLUTION: This injector includes: a syringe 1 on which an injection needle 7 is mounted; a piston 2 sliding inside the syringe 1; and a plunger 3 sliding the piston 2 to discharge a content. The piston 2 includes a central open hole 2d penetrating toward a filling space M. The plunger 3 includes, in an inside space 3a<SB POS="POST">2</SB>thereof, a rod 4 that is slidably retained in the central open hole 2d and is disposed concentrically and duplicatedly with the plunger 3. A plunger stopper 3c, when the plunger 3 is pushed to discharge residual air in the injection needle 7 along with a part of the content, is brought into contact with a finger rest part 1e provided at the rear end of the syringe 1, to stop the pushing. A rod stopper 4h<SB POS="POST">1</SB>stops a tip end 4a projected to the inside of the filling space M by the pushing of the rod 4, at a predetermined projection amount to stop the discharge of the content at the prescribed amount. <P>COPYRIGHT: (C)2013,JPO&INPIT |
