| 摘要 |
<p>The invention provides a kind of disposable safety syringe, which includes a cylinder (1) a plunger (2), a piston (3) mounted on the front end of the plunger and a pinhead (4). The pinhead (4) is mounted on a pinhead base (11) which is on the front end of the cylinder (1); The pinhead (4) includes a needle base (41), a needle cover (42), a needle (43) and a spring (45); The needle cover (42) includes a step on its rear end and a through hole in its center; The needle (43) is mounted on the front part of the through hole of the needle cover (42); The needle base (41) has a through chamber in its center where the spring (45) is mounted in, and there is a fitting connect device between the needle base (41) and the pinhead base (11) ; A sealing ring is mounted between the step of the rear end of said needle cover and the distal end of the chamber of the needle base (41), a top ring (21) corresponding to the sealing ring (44) is on the front end of the plunger (2). When the injection is completed, the safety syringe has no medicine residue, and can be self-destructed, after that, it can not be reused.</p> |
