Patent ID: 7322997
Filing Date: 2008-01-29
Classification: A61B

Abstract:
1. A casing self-locking type of automatic safe blood sampling device, comprising: a casing formed with a launching chamber therein, the launching chamber being provided with a lancet needle-exiting hole at a front end thereof; a lancet needle arranged inside the launching chamber; a spring; a launching mechanism composed of the spring and a catch-launching mechanism; a press-launching mechanism provided on the casing; and a self-locking mechanism composed of barbs provided on the press-launching mechanism and self-locking hooks or self-locking notches provided on the casing corresponding to the barbs, the self-locking hooks or self-locking notches being located on paths along which the barbs are advanced, respectively, wherein the press-launching mechanism is configured to be a press button for launching which is provided on a side of the blood sampling device, and the press button being formed into a first elastic arm mounted on or extended integrally from a side of the casing, and wherein the barbs are provided on the press button and the self-locking hooks or self-locking notches being provided on the casing at positions corresponding to those of the barbs, respectively, wherein: the catch-launching mechanism comprises a second elastic arm extended from the casing, the first elastic arm, and a blocking notch formed in the lancet needle, wherein: the second elastic arm and the blocking notch are located on one same side of the casing; the second elastic arm is inclined towards inside of the launching chamber; a cantilever end of the second elastic arm can be engaged with the blocking notch so as to form a locking structure; and the first elastic arm is located on the other side of the casing and functioned as the press button for launching; an extension section of the first elastic arm passes across the launching chamber so as to contact or be close to the cantilever end of the second elastic arm; the barbs are provided on the extension section of the first elastic arm; and the self-locking hooks or self-locking notches are provided on an inner wall of the casing at positions corresponding to those of the barbs, respectively.