Patent ID: 8052641

Claim:
A winged indwelling needle comprising: (A) a movable unit having a cannula and a cylindrical hub to be connected to the cannula with the rear portion of the cannula inserted into the front portion thereof; (B) a tube which is connected to the rear portion of the hub and is brought into communication with the cannula, (C) a holder, and (D) a fixing wing having flexibility, the movable unit being provided on the holder so as to be capable of sliding in the axial direction, being capable of changing in position between a position in use and a stored position which is behind the position in use, and disengageably engaging the holder so as to be fixed to the holder when the movable unit is positioned at the position in use, wherein the holder includes: (a) a protecting cylinder which is positioned at the front portion of the holder, allows the cannula to project forwardly from the front end thereof when the movable unit is positioned at the position in use and stores only the front portion including a blade point of the cannula in the interior thereof when the movable unit is positioned at the stored position, and is provided with the fixing wing, and (b) a guide member positioned at the rear of the holder for guiding the sliding movement of the movable unit and fixing the movable unit by engaging the movable unit when the movable unit is positioned at the stored position, wherein the guide member (i) is formed into a plate shape having a planar shape on the upper and lower side, (ii) is exposed on the upper side, so that the tube is positioned above the guide member whereby the guide member allows the upward movement of the tube when the movable unit is positioned at the position in use, and (iii) is formed at the lower surface thereof with a depressed portion for allowing the guide member to bend upward so that it may curve when a compression force in the axial direction is exerted.