| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a synthetic resin needle having a piercing resistance near that of the prior art metallic needle, showing no possibility that the needle end is twisted after performing several times of piercing operation and further capable of performing positively a feeding of chemical liquid. <P>SOLUTION: The synthetic resin needle 1 comprises a canula 2 of hollow tubular member having an inner diameter R<SP>1</SP>and an outer diameter R<SP>2</SP>, and a blade 3 having more than one inclined surface arranged at the extremity end of the canula 2. The extremity of the blade 3 is provided with a weight 5. The bottom surface 51 of the weight 5 is positioned between the outer surface and the inner surface of the canula 2. A distance of the top point 52 of the weight 5 from the central axis of the canula 2 is set to have a relation of R<SP>1</SP>/2<D<R<SP>2</SP>/2. <P>COPYRIGHT: (C)2003,JPO |
