PROBLEM TO BE SOLVED: To provide a puncturing device which allows the puncturing needle to be pulled out with restrained attenuation vibration so that an operator can have a stabilized feeling to operate.SOLUTION: The puncturing device comprises an abutting part 22, a test paper 28, a blood flow passage 26, a blood introducing guide 24, a driving coil spring 108, a returning coil spring 110, and a little projection piece 157. The abutting part 22 abuts on the skin 162 around a position P to puncture the test paper 28 determines blood components the blood flow passage 26 runs across the test paper 28 and the inner wall surface of a housing 14 the blood introducing guide 24 extends from the opening 26a of the blood flow passage 26 toward a lumen the driving coil spring 108 pushes a puncturing needle 34 from a standing position to puncture toward the position P to puncture the returning coil spring 110 pulls out the puncturing needle 34 and the little projection piece 157 abuts against the top 152a of a first stop lever 152 and stops the puncturing needle 34 at a predetermined position for terminating the puncturing work, and stops the puncturing needle unit 18.COPYRIGHT: (C)2007,JPO&INPIT【課題】穿刺針が退動する際の減衰振動を抑制し、操作者に安定した操作感覚を与える。【解決手段】穿刺箇所Pの周囲の皮膚162に当接する当接部22と、血液の成分を測定する試験紙28と、試験紙28からハウジング14の内壁面に連通する血液流通路26と、血液流通路26の開口部26a近傍から内腔方向に向かって延在する血液導入ガイド24と、穿刺針34を穿刺準備位置から穿刺箇所Pに向かって進出させる駆動用コイルスプリング108と、穿刺をした穿刺針34を退動させる戻し用コイルスプリング110と、穿刺針34を規定の穿刺動作終了位置に停止させる小突出片157とを有する。小突出片157は第1ストップレバー152の先端部152aに当接し、穿刺針34及び穿刺針ユニット18を停止させる。【選択図】図8
