Injection needle assembly and medicine injection device

Abstract

A needle tube having a needle tip for puncturing skin; a needle hub; and an absorption part for absorbing 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 so as to cover an area surrounding the needle tube and that makes contacts with and/or faces the skin when a living body is punctured with the needle tube. The absorption part is disposed in the skin contact portion of the needle hub and absorbs medicine that has been spilled during air removal and is held in the skin contact portion so as to thereby prevent the medicine from attaching to or contacting the skin of a user.

What is claimed is: 
     
         1 . An injection needle assembly, comprising:
 a needle tube having a needle tip for puncturing the skin;   a needle hub including: a retention part for retaining the needle tube; an insertion part into which an output portion of a syringe is inserted; and a flange-like skin contact portion that is disposed so as to cover an area surrounding the needle tube and that makes contact with and/or faces the skin when a living body is punctured with the needle tube; and   an absorption part that is disposed in the skin contact portion of the needle hub and absorbs a medicine staying in the skin contact portion.   
     
     
         2 . The injection needle assembly according to  claim 1 , wherein
 the absorption part is defined by a moisture absorption material.   
     
     
         3 . The injection needle assembly according to  claim 1 , wherein
 the absorption part has a net-like structure.   
     
     
         4 . The injection needle assembly according to  claim 1 , wherein
 the absorption part includes an adsorption channel for adsorbing a medicine disposed in the skin contact portion of the needle hub.   
     
     
         5 . The injection needle assembly according to  claim 1 , wherein
 the skin contact portion comprises:   an adjustment portion that is disposed in an area surrounding the needle tube and includes a needle protrusion surface from which the needle tip of the needle tube protrudes;   a cylindrically formed stabilizer that is disposed in a manner so as to cover an area surrounding the needle tube and makes contacts with skin when a living body is punctured with the needle tube; and   a guide portion that is disposed on an outer circumferential surface of the stabilizer and makes contact with the skin when the living body is punctured with the needle tube, thereby guiding a pressing force of both the needle tube and the stabilizer and defining the force to be exerted to the living body.   
     
     
         6 . The injection needle assembly according to  claim 5 , wherein
 the absorption part is disposed in a concave portion formed by the adjustment portion and the stabilizer.   
     
     
         7 . A medicine injection device, comprising:
 a syringe having an output portion;   a needle tube having a needle tip for puncturing the skin;   a needle hub including: a retention part for retaining the needle tube; an insertion part into which an output portion of the 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 the living body is punctured with the needle tube; and   an absorption part that is disposed in the skin contact portion of the needle hub and enables absorbs a medicine staying in the skin contact portion.   
     
     
         8 . The injection needle assembly according to  claim 7 , wherein
 the absorption part is defined by a moisture absorption material.   
     
     
         9 . The injection needle assembly according to  claim 7 , wherein
 the absorption part has a net-like structure.   
     
     
         10 . The injection needle assembly according to  claim 7 , wherein
 the absorption part includes an adsorption channel for adsorbing a medicine disposed in the skin contact portion of the needle hub.   
     
     
         11 . The injection needle assembly according to  claim 7 , wherein
 the skin contact portion comprises:   an adjustment portion that is disposed in an area surrounding the needle tube and includes a needle protrusion surface from which the needle tip of the needle tube protrudes;   a cylindrically formed stabilizer that is disposed in a manner so as to cover an area surrounding the needle tube and makes contacts with skin when a living body is punctured with the needle tube; and   a guide portion that is disposed on an outer circumferential surface of the stabilizer and makes contact with the skin when the living body is punctured with the needle tube, thereby guiding a pressing force of both the needle tube and the stabilizer and defining the force to be exerted to the living body.   
     
     
         12 . The injection needle assembly according to  claim 11 , wherein
 the absorption part is disposed in a concave portion formed by the adjustment portion and the stabilizer.   
     
     
         13 . A method of using a medicine injection device comprising a syringe filled with a medicine and having an output portion; a needle tube having a needle tip for puncturing the skin; a needle hub including a retention part for retaining the needle tube and an insertion part into which an output portion of the syringe is inserted; 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 the living body is punctured with the needle tube; and an absorption part that is disposed in the skin contact portion of the needle hub, said method comprising:
 removing air from the medicine injection device prior to injection of the medicine, whereby medicine spilled from the needle tip is caught in the skin contact portion;   the absorption part absorbing the spilled medicine staying in the skin contact portion;   positioning the skin contact portion adjacent the skin;   puncturing the skin with the needle tip; and   injecting medicine from the needle tip into the skin.