| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a needle device capable of preventing retention of bubbles on the outer peripheral surface of an inner hub. <P>SOLUTION: The needle device includes the inner hub 9 with a needle attached to the distal end, and a cylindrical body in which the inner hub 9 is housed. The inner hub 9 includes a through hole 22 penetrating in the radial direction of the inner hub 9 and a projection 25 formed between an opening of the through hole 22 and the distal end 26 of the inner hub 9 to project from the outer peripheral surface 23 of the inner hub 9. As the projection 25 is formed in the inner hub 9, a liquid flowing out of the opening of the through hole 22 formed in the inner hub 9 is divided into both sides of the projection, and the flow in the circumferential direction of the inner hub 9 can be facilitated. With this structure, discharge of bubbles in the circumferential direction of the inner hub 9 is facilitated, and therefore, retention of bubbles on the inner peripheral surface 23 of the inner hub 9 can be prevented. <P>COPYRIGHT: (C)2011,JPO&INPIT |
