Patent ID: 9744294
Date: 2017-08-29
CPC Classifications: A61M

Claim:
1. A puncture device comprising: a puncture needle including an outer needle and an inner tube located in the outer needle; a housing unit accommodating the puncture needle; and a puncture mechanism located within the housing unit, the puncture mechanism including: wherein, when the push-in unit is pushed in under the condition of fixation between the push-in unit and the outer needle slide unit, and fixation between the outer needle slide unit and the inner tube, the outer needle containing the inner tube therein projects from the housing unit in accordance with sliding of the outer needle slide unit in a first direction, and wherein, when the outer needle slide unit slides to a predetermined position, the outer needle is retracted into the housing unit while the inner tube remains projected from the housing, in accordance with release of the fixation between the push-in unit and the outer needle slide unit and the fixation between the outer needle slide unit and the inner tube, and in accordance with sliding of the outer needle slide unit in a second direction by operation of the elastic member.