| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve a structure that can stably manufacture a needle holder 11a excellent in quality. <P>SOLUTION: The needle holder is made of a polymer material by injection molding, and includes a cylinder part 14a and a reinforcing plate part 15a. A projection radially projected is not present on an inner circumference surface of this cylinder part 14a, and also resistance against pulling out of a mold for injection-molding the polymer material is larger in another end side portion than in the reinforcing plate part 15a and than in an axial one end side portion in the cylinder part 14a. <P>COPYRIGHT: (C)2013,JPO&INPIT |
