PUNCTURE DEVICE

摘要

To provide a puncture device in which an inner needle (3) is accommodated in an inner needle hub (41) by pulling operation of an inner needle, a through hole for inserting the inner needle is blocked, and the inner needle is prevented from protruding outside. The puncture device includes an outer pipe (6) fitted inside the inner needle hub (41) so as to be freely moveable, and an inner pipe (7) fitted inside the outer pipe (6) so as to be freely moveable, which has a through hole (73) for inserting the inner needle (3). The inner pipe (7) includes a through hole block means (space 75, the block body 74) for blocking communicated condition of the through hole, which makes at least part of the through hole move from a position where the inner needle (3) is inserted to a position where the inner needle (3) is blocked.

主权项

1. A puncture device comprising an outer needle, an outer needle hub for retaining a base portion of said outer needle, an inner needle whose tip portion is inserted in said outer needle, a cylindrical syringe for retaining a base portion of said inner needle, wherein the syringe is provided with an inner needle hub for retaining a base portion of said inner needle, a gripping means for gripping said outer needle hub, and a cylinder body fitted inside the inner needle hub so as to be freely moveable, wherein the cylinder body is provided with an outer pipe fitted inside the inner needle hub so as to be freely moveable, and inner pipe fitted inside said outer pipe so as to be freely moveable and having a through hole for inserting the inner needle,
wherein either the inner pipe or the inner pipe and the outer pipe is provided with through hole block means for blocking a communicated state of the through hole, which makes at least part of the through hole move from a position where the inner needle is inserted to a position where the inner needle is blocked, and wherein insertion of the inner needle is blocked by moving the through hole of the inner pipe with the through hole block means.