| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide easy and smooth movement to draw a used needle into a plunge part. <P>SOLUTION: A disposable syringe includes a plunge which is movable in a barrel (2) and to a needle seat (41). The needle seat (41) engages with a barrel wall (230) which is an inner periphery of the barrel (2), by resistance. The plunge includes a plunge part (5) and a coupling rod (6) which engages with the plunge part (5) by friction and which has a center joining area (63) set to engage with a joint part (412) in the needle pedestal (41) by retention. Consequently, when the plunge part (5) is moved so that the center joining area (63) may engage with the joint part (412), resistance is quenched , enables the needle seat (41) to be separated from the barrel (2), and the coupling rod (6) and needle seat (41) to be drawn into the plunge part (5) by biasing of a biasing component (7). <P>COPYRIGHT: (C)2005,JPO&NCIPI |
