| 摘要 |
A blood sampler of the suction-type is provided with a gasket, a lancet unit and a plunger slidable in a housing having an open front and an open rear end. A rod is connected at its front end to the lancet unit. The rod extends rearwardly over a detent integral with the inner periphery of the housing, through a central opening of the gasket and into an axial bore of the plunger. A flange, secured to the rear end of the rod is slidable within the axial bore, the gasket is slidable within the housing and behind the detent, and a protrusion formed integral with an intermediate portion of the rod is engageable with the detent. The blood sampler further has a first spring intervening between the detent and the lancet unit, and a second spring accommodated in the bore and intervening between the flange and the front end of the plunger. |
