| 摘要 |
<p>An objective of the present invention is to propose a puncture device and a medical fluid application device whereby it is possible, with a simple configuration, to reliably puncture with a dual structure puncture needle wherein an inner needle is an indwelling needle. When a push part (5A) is pushed, a central part (5D) having an outer needle (62) slides downward, and an inner needle pulling part (72) which is anchored to the push part (5A) pulls an inner needle (50), thereby puncturing the interior of a user's body with the outer needle (62) and the inner needle (50) which is inserted within the outer needle (62). When the push part (5A) is pushed to the utmost, hook-shaped stoppers (89A, 89B) of the central part (5D) are opened, returning only an outer needle slide part (80) of the central part (5D) to the original location by the restoring force of a coil spring (94), thereby retracting only the outer needle (62) within a medical fluid application device (1) while leaving the inner needle (50) within the body. Thus, it is possible to simplify the configuration, and to reliably puncture the interior of the user's body with the inner needle (50) together with the outer needle (62), without requiring a separate drive part, as an example.</p> |
