Patent ID: 8496626
Filing Date: 2013-07-30
Classification: A61M

Abstract:
1. A needle assembly comprising a needle having a cutting blade formed in a distal end, a hub for holding a proximal end portion of the needle, and a distal end guarding portion, the needle assembly comprising: a restraining portion for restricting a distance between the distal end guarding portion and the hub; and, a fixing portion connected to the distal end guarding portion via a hinge portion, wherein the distal end guarding portion rotates via the hinge portion, with respect to the fixing portion, and the distal end guarding portion has a first aperture portion arranged at a proximal end of the needle, a second aperture portion arranged at a distal end of the needle, and a needle tip retraction preventing portion arranged at the second aperture portion; and, an opening of the first aperture portion and an opening of the second aperture portion form an angle with respect to each other, wherein the needle, in a pre-usage stage, is inserted into a distal end guarding portion from the first aperture portion of the distal end guarding portion and is in a state withdrawn from the second aperture portion, and after usage, moves from the second aperture portion by the needle, which is in contact with the needle tip retraction preventing portion, flexing, and the distal end of the needle is guarded by the needle tip being housed inside the distal end guarding portion in a state of being engaged with the distal end guarding portion.