PROBLEM TO BE SOLVED: To provide a needle device capable of preventing retention of bubbles on the outer peripheral surface of an inner hub.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.COPYRIGHT: (C)2011,JPO&INPIT【課題】内ハブの外周面における気泡の滞留を防止することができる針装置を提供する。【解決手段】先端に針が取り付けられた内ハブ9と、内ハブ9が収納されている筒状の本体とを備え、内ハブ9は、内ハブ9の径方向に貫通した貫通孔22と、貫通孔22の開口と内ハブ9の先端26との間に形成され、内ハブ9の外周面23から突出した突起25とを含む。内ハブ9に突起25を形成したことにより、内ハブ9に形成した貫通孔22の開口から流出した液体を、突起25の両側に分流させ、内ハブ9の周方向に進む流れも促進させることができる。このことにより、内ハブ9の周方向における気泡の排出が促進され、内ハブ9の外周面23における気泡の滞留を防止することができる。【選択図】図7
