| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a medical syringe capable of automatically storing a needle therein after an injection performance and also preventing an accidental operation. <P>SOLUTION: A plunger 6 includes a shaft part 61 to be mounted on a piston 4, and a shaft part 62 to be mounted on the rear end part of the shaft part 61. The shaft parts 61 and 62 integrally move to a casing 7 in the shaft direction during an injection by a movement of the piston 4, pushing the shaft part 62 into the tip end side to the shaft part 61 separates the shaft parts 61 and 62, further pushing the shaft part 62 separated from the shaft part 61 pushes the casing 7 into so that the tip end part of the casing 7 could cover a periphery of the needle. A cap 9 can be attached to the rear part of the casing 7 so as to protect a rear part of the plunger 6 before injection, and also can be attached to the front part of the casing 7 so as to cover over the injection needle from forward. <P>COPYRIGHT: (C)2009,JPO&INPIT |
