| 摘要 |
<p>Disclosed is an injection needle assembly and drug injection device that can ensure a required pressing force and insertion speed when a needle tube is inserted into the skin and can position a needle point of a needle tube with certainty on the upper layer section of the skin. The needle injection assembly (2) comprises the needle tube (5) with the needle point (8) that can be inserted into a living body, a hub (6) that holds the needle tube (5), an adjustment section (12), a stabilizing section (13), and an insertion speed securing member (7). The adjustment section (12) is provided around the periphery of the needle tube (5) and has a needle protrusion surface (12a) from which the needle point (8) in the needle tube (5) protrudes. The stabilizing section (13) extends from the hub (6), is positioned to cover the periphery of the needle tube (5), and has an end surface (13a) that comes in contact with the skin when the needle tube (5) is inserted into a living body. The insertion speed securing member is provided in the adjustment section (12) or the stabilizing section (13) such that said insertion speed securing member can travel along the shaft direction of the needle tube (5). The insertion speed securing member comes in contact with the skin before the needle point (8) of the needle tube (5) when the needle tube (5) is inserted into a living body and ensures the speed and pressing force used when the needle tube (5) is inserted into a living body.</p> |
