| 摘要 |
PURPOSE:To suck out pricked blood by as much as the required amt. and to collect the blood without splashing by moving a plunger by means of a spring to generate a reduced pressure state in the aperture held in tight contact thus far with the skin and the inside chamber of a housing and the space composed of the plunger and the inside chamber. CONSTITUTION:A cylindrical part 6 is moved forward by pushing the plunger 3 forward, and further, the plunger 3 is moved toward its front end in the state of fixing a lancet part 2 into the housing 1, by which the front end of the cylindrical part 6 is abutted against a detaining part 17. This detaining part 17 is pressed to disengage the detaining state when the plunger 3 is further pushed in its front end direction. The detaining part 17 is then slid and moved on the inside wall of a part 25 for stopping retreating of the lancet holding part and the lancet part 2 is jumped out vigorously in the front end direction by the force of the spring 9 until a pricking needle 12 pricks the skin. Next, the springs 8, 29 extend and the plunger 3 move backward when a press plate 30 is removed. A negative pressure is then generated in the housing 1 and the blood is sucked out of the pricked point of the skin. |
