Disposable Lancing Device and Method of Operating the Same

A disposable lancing device comprising:

• a first casing including a close segment formed on a first end of the first casing, an open segment formed on a second end of the first casing, a slideway formed in the first casing, two tilted contact faces formed on two side wall of the slideway, two first shoulders formed on the slideway, a fixing portion formed on the slideway and corresponding to the close segment, two recesses defined on two side walls of the first casing, and two push fringes formed around the two recesses;
• a second casing including an accommodation chamber defined in the second casing, and the second casing being slidably received on the slideway of the first casing, the second casing including two limitation extensions corresponding to the first casing and engaged with the two first shoulders of the casing, multiple drive protrusions proximate to the two limitation extensions and having multiple urge segments formed on multiple predetermined positions of the multiple drive protrusions, wherein a forcing face is defined on an end of the second casing opposite to the two limitation extensions, and a through hole is defined on a center of the forcing face, wherein the through hole has a protruded rib extending outward therearound opposite to the forcing face;
• a needle holder defined between the first casing and the second casing, and the needle holder including a collection needle accommodated in the needle holder, wherein the collection needle includes a syringe needle fixed on an end thereof and corresponding to the through hole of the second casing, the needle holder further includes a trigger spring corresponding to the fixing portion of the first casing, and the needle holder further includes a return spring corresponding to the through hole of the second casing;
• wherein the needle holder includes two symmetrical flexible wings corresponding to the two tilted contact faces of the first casing, and the two symmetrical flexible wings include two driving segments formed on two distal ends thereof, wherein the two driving segments abut against the two symmetrical flexible wings of the needle holder to flexibly retract inward by using the two tilted contact faces of the first casing.