BODY FLUID SAMPLING APPARATUS

摘要

A body fluid sampling apparatus (A), comprising a piston (11) provided in a tubular main case (10), a first plunger rod (12) extending into the piston (11) integrally with each other, a first spring (13) elastically energizing the piston (11) toward the upper end side, a second plunger rod (15) installed in the first plunger rod (12) through a second spring (14), a lancet mounted body (16) provided on the second plunger rod (15) and having a lancet (B) mounted therein, a third spring (17) elastically energizing the lancet mounted body (16) toward the upper end side, latch mechanisms (20, 30) suppressing the second plunger rod (15) and first plunger rod (12) when the first plunger rod (12) is moved to the lower end side by the push-down of the piston (11), and a release mechanism (40) for releasing the locked state of the first plunger rod (12) and the second plunger rod (15).