The lancet device includes a housing and a lancet having a puncturing element. The lancet is disposed within the housing and is adapted for axial movement between an initial or pre-actuated position wherein the puncturing element is retained within the housing, and a puncturing position wherein the puncturing element extends through a forward opening in the housing. The lancet device includes a drive spring disposed within the housing for biasing the lancet toward the puncturing position, and a retraction or return spring for returning the lancet to a position within the housing where the puncturing element is disposed within the housing. The retraction spring thereafter maintains engagement with the lancet to assist in preventing the puncturing element from again projecting outward from the forward opening in the housing.

The present invention includes a system for withdrawing body fluids. The system includes a drive unit having a plunger which is moved from a resting position into a lancing position in order to carry out a lancing process and a lancing unit containing a lancet with a needle. The plunger and lancet are coupled together by a form fit in order to carry out a lancing process. The invention additionally concerns a method for temporarily extending a needle from a device for withdrawing body fluid as well as a lancing unit that can be attached to the drive unit.

A safety lancet includes a housing, a needle core, a pusher and a launching spring, the front end of the needle core having a protective rod, the side of the needle core having an elastic arm having a protrusion; a sliding platform is provided for the protrusion on the inner wall of the housing, and the front end face of the sliding platform is the triggering surface for triggering launching the lancet, and the tabletop of the sliding platform is a sliding surface in the length direction of the lancet; the distance of the decoupling point of the projection relative to the center of the lancet is greater than or equal to the distance of the sliding surface relative to the center of the lancet; a stopper is on the protection rod, and corresponding to the stopper a second limit surface is on the inner wall of the pusher.

A lancet pricking device comprises a lancet, a launching spring, a trigger part and a holder housing the lancet, launching spring and trigger part. The lancet comprises a lancet body, lancet cap and pricking needle. The pricking needle is in both the lancet body and lancet cap. The trigger part has a pair of arms positioned inside the holder. The launching spring is attached to the lancet body. The lancet body is secured to the arms of the trigger part by an abutment of the lancet body on the arms such that the launching spring is compressed before a pricking operation. The trigger part cannot be pushed toward the inside of the holder before the lancet cap is removed, but can be pushed toward the inside of the holder after the cap is removed. The lancet body warps when pressed to release the secured lancet body.

There is provided a process of producing a lancet which suppresses curving (or flexing) of the front end portion of the pricking member. In the production of a lancet by injection molding of a resin with a pricking member inserted in a mold, upon forming at least a portion of a lancet cap in which portion a molten resin supplied to the mold surrounds a front end portion of the pricking member, a mold is used which is configured such that at least a portion of the molten resin which forms said portion of the lancet cap flows along the front end portion including a leading end of the pricking member toward its leading end.

A puncture needle cartridge (1) includes: a lancet body (5) mounted with a puncture needle (3) on a front end side and having a mount (4) on a rear end side; and a plate-like first case (6) and second case (7) covering the lancet body (5) from above and below and arranged slidably back and forth along each other. The puncture needle cartridge (1) is configured such that the first case (6) is slid forward of the second case (7), and in this slid state, the first case (6) and the second case (7) are secured to each other when ejected from the puncture instrument (10). This can make the puncture needle cartridge (1) impossible to mount again on the puncture instrument (10).

A lancet pricking device comprising a lancet, a launching spring and a lancet holder for housing therein the lancet and the launching spring. The lancet pricking device of the present invention is characterized in that the lancet comprises a lancet body, a lancet cap and a pricking needle, and the pricking needle is disposed in both the lancet body and the lancet cap; wherein the launching spring is attached to the lancet body, and the lancet body is secured by abutting against the lancet holder such that the launching spring is kept compressed before a pricking operation; and wherein, when the lancet cap is removed, the lancet body becomes capable of warping upon being pressed from an outside to cause the secured lancet body to be released.

There is provided a lancet wherein a lancet cap is composed at least of a grip member and a pricking-component protective member, and the pricking-component protective member has a two-part structure of a flexible part and a rigid part, the flexible part having a relative flexibility with respect to the rigid part, the rigid part having a relative rigidity with respect to the flexible part.

A disposable automatic painless safe hemostix includes an outer casing, an inner sleeve, a needle module and a spring. The needle module is snapped in the inner sleeve and the outer casing. The needle module has a needle point protecting pole. Interlock fixing faces and protrusions are provided on the inner sleeve. Interlock guiding slopes and protrusion stoppers are provided on the inner wall of the outer casing. One end of the interlock engages the interlock fixing face, and the other end engages the interlock guiding slope.

A bodily fluid sampling device is operable to lance with a precise depth and express fluid from both fingertip and alternate sites. In one form, the device is operable to adjust the penetration depth of the lancet into the skin. The bodily fluid sampling device includes a lancet adapted to form an incision in skin. A skin contacting member has an orifice through which the lancet extends when lancing the skin. The orifice has a first opening size that is sized to flatten the skin around the lancet during lancing. The orifice has a second opening size that is larger than the first opening size after the incision is formed to express fluid from the incision.