Patent ID: 6730046
Filing Date: 2004-05-04
Classification: A61B

Abstract:
A body fluid sampler comprising:a cylindrical main case having a first end provided with a first opening and a second end provided with a second opening; a piston inserted in the main case to project from the first opening for movement within the main case airtightly with respect to an inner wall of the main case; a first plunger rod extending integrally from the piston toward said second end; a first elastic member for elastically urging the piston toward said first end; a second plunger rod extending from the first plunger rod toward said second end for movement within the main case with a compressible second elastic member interposed between the first plunger rod and the second plunger rod; a lancet mount associated with the second plunger rod adjacent to said second end for movement within the main case, the lancet mount being provided with a lancet oriented toward said second end; a third elastic member for elastically urging the lancet mount toward said first end; a latch mechanism which works, when the piston is pushed down for movement toward said second end together with the first plunger rod, for restricting movement of the second plunger rod toward said second end against a pushing force of the second elastic member and for restricting rebounding of the piston and first plunger rod which have been moved toward said second end while allowing the second elastic member to be compressed; and a release mechanism for releasing the first plunger rod and second plunger rod which have been latched by the latch mechanism.