Injection neddle assembly and medicine injection device

Abstract

A needle tube having a needle tip for puncturing skin; a needle hub; and a fluid-draining portion for enabling draining of a medicine. The needle hub includes: a retention part (first member) for retaining the needle tube; an insertion part into which the output portion of a syringe is inserted; and a flange-like skin contact portion that is disposed in a manner so as to cover an area surrounding the needle tube and makes contact with and/or faces the skin when a living body is punctured with the needle tube. The fluid-draining portion is disposed in the skin contact portion of the needle hub and enables a user to drain the medicine that has spilled when removing air and is held in the skin contact portion.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS[0001]This application claims priority as a continuation application under 35 U.S.C. §120 to International Application No. PCT / JP2012 / 055093 filed on Feb. 29, 2012, designating the U.S., and which claims priority to Japanese Application No. 2011-101225 filed on Apr. 28, 2011, the entire content of both of which is incorporated herein by reference.TECHNICAL FIELD[0002]The present invention relates to an injection needle assembly and a medicine injection device, which have a skin contact portion that is disposed to cover the area surrounding a needle tube and which makes contact with and / or faces the skin.BACKGROUND ART[0003]Conventionally, an injection needle assembly is provided with a skin contact portion that allows adjustment of the depth of a needle puncturing in order to stably puncture the skin. Such a configuration makes it possible to reliably penetrate the injection needle to a target depth. Further, such capability of stable puncturi...

AI Technical Summary

Benefits of technology

[0010]The injection needle assembly and the medicine injection device according to the disclosure enable a user to easily drain any medicine staying in the skin contact portion by virtue of the fluid-draining portion disposed in the skin contact portion of the needle hub. As a result, the medicine that has been spilled when performing the air removal procedure can be drained before administering the medicine, and thus it is possible to prevent the medicine being held in the skin contact portion from contacting the user.

Problems solved by technology

Hence, when performing the air removal procedure using such a configured injection needle assembly, not only is the air contained in the syringe exhausted, but the medicine filled in the syringe may also spill from the needle tube and there is a risk of the medicine being held in the space between the skin contact portion and the needle tube.

A problem has thus arisen because the medicine staying in the space between the skin contact portion and the needle tube contacts or attaches to the skin of a user, and causes discomfort to the user when administering the medicine in the injection needle.

Images