Automatic safe disposable blood sampling device of casing self-locking type
First Claim
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.
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Abstract
An automatic safe disposable blood sampling device includes a casing with a launching chamber formed therein. The launching chamber has 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 notches provided on the casing which engage corresponding barbs. When pressed, the press-launching mechanism triggers the catch-launching mechanism, to disengage the lancet needle from the casing. The spring pushes the lancet needle so as to launch the lancet needle. During forward movement of the press-launching mechanism, the barbs pass across the self-locking hooks or notches. In the process of retraction, the barbs are locked with the self-locking hooks or notches and cannot return to their initial states.
144 Citations
4 Claims
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1. A casing self-locking type of automatic safe blood sampling device, comprising:
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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. - View Dependent Claims (2, 3, 4)
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Specification