Patent ID: 9044556
Filing Date: 2015-06-02
Classification: A61M

Abstract:
1. An injector comprising: a support tube having a hollow interior and possessing an end face at a distal end of the support tube to be pressed against skin; a movable tube positioned in the support tube, the movable tube possessing a hollow interior and a distal end; a medicinal fluid in the movable tube; an injection needle connected to the distal end of the movable tube so that the movable tube and the injection needle move together as a unit, the injection needle extending in a distal direction from the distal end of the movable tube, the injection needle possessing a sharp distal end, the needle including a lumen having a rear end opening which opens into the hollow interior of the movable tube and a tip end opening at the sharp distal end of the needle from which the medicinal liquid is ejected; a plunger in the hollow interior of the movable tube and movable in the distal direction toward the distal end of the movable tube to deliver the medicinal liquid in the movable tube into the lumen of the injection needle; a sealing material at the distal end of the support tube, fixed within the lower end of the hollow interior of the support tube, the sharp distal end of the injection needle being embedded in the sealing material so the tip end opening of the lumen of the injection needle is closed by the sealing material to prevent the medicinal fluid in the movable tube from flowing out the tip end opening of the lumen of the injection needle; the movable tube being movable within the hollow interior of the support tube to move in a distal direction relative to the support tube from an initial position in which the sharp distal end of the injection needle is embedded in the sealing material to a puncture position in which the sharp distal end of the injection needle is positioned distally of the sealing material and distally of the end face of the support tube to puncture the skin; and a stopper provided on at least one of the support tube and the movable tube which stops the movement of the movable tube in the distal direction relative to the support tube so the movable tube is at the puncture position.