Patient's skin-puncturing devices

A skin-puncturing device, comprising:

• a main body, comprising:
• a casing in a form of a tube with a longitudinal axis, an open front end, and an open back end;
• and
• a mechanism unit in the casing, the mechanism unit comprising:
• a mechanism body;
• a puncturing mechanism with a lancet guiding unit;
• a puncture depth regulation mechanism;
• and
• a used lancet removal mechanism;
• a cup configured to close the main body at the open front end of the casing;
• a drive spring of the lancet guiding unit;
• a one-piece driving sleeve;
• a return spring of the lancet guiding unit;
• a button, at the open back end of the casing, configured to tension the drive spring;
• a member configured to release the tension of the drive spring;
• a lancet socket of the lancet guiding unit;
• and
• a lancet blade in the lancet socket;
• wherein a front end of the mechanism body is generally flush with the open front end of the casing,
• wherein a back end of the mechanism body is inside the casing,
• wherein the mechanism body is fixed in the casing,
• wherein the lancet guiding unit comprises the lancet socket with a guide that passes through a first opening in a transverse partition of the mechanism body, from a lancet chamber at a front end of the lancet guiding unit to a front end of the driving sleeve at a back end of the lancet guiding unit,
• wherein the driving sleeve as a whole is configured to:
• rotate within the casing with respect to the mechanism body;
• slide within the casing, with respect to the mechanism body, toward the open front end of the casing and toward the open back end of the casing;
• and
• slidingly fit in the back end of the mechanism body;
• wherein the return spring is between the transverse partition of the mechanism body and the front end of the driving sleeve,
• wherein the drive spring is between the driving sleeve and the button,
• wherein the button is configured to rotate within the casing and is configured to slidingly fit in the open back end of the casing,
• wherein the member configured to release the tension of the drive spring is a springy latch of the driving sleeve, configured to cooperate with a stop surface of the mechanism body and an activating surface of the button, and
• wherein the puncture depth regulation mechanism comprises:
• the button, rotary-coupled with a back end of the driving sleeve and configured to rotate the driving sleeve;
• limiting steps formed in the back end of the mechanism body, wherein each of the limiting steps defines a relative puncture depth for selection by the driving sleeve;
• and
• a bumper portion of the driving sleeve configured to engage a selected one of the limiting steps, upon rotation of the driving sleeve caused by rotating the button when selecting the relative puncture depth with respect to the limiting steps, in order to limit movement of the bumper portion when the driving sleeve slides toward the open front end of the casing, and to select the relative puncture depth upon engagement between the bumper portion and the selected one of the limiting steps.

A skin-puncturing device, comprising:

• a main body, comprising:
• a tubular casing with a longitudinal axis, a front end, and a back end;
• and
• a mechanism unit in the casing, the mechanism unit comprising:
• a mechanism body;
• a puncturing mechanism with a lancet guiding unit;
• a puncture depth regulation mechanism;
• and
• a used lancet removal mechanism;
• a cup configured to close the main body at the front end of the casing;
• a drive spring of the lancet guiding unit;
• a one-piece driving sleeve;
• a return spring of the lancet guiding unit;
• a button, at the back end of the casing, configured to tension the drive spring;
• and
• a member configured to release the tension of the drive spring;
• wherein a front end of the mechanism body is generally flush with the front end of the casing,
• wherein a back end of the mechanism body is inside the casing,
• wherein the mechanism body is fixed in the casing,
• wherein the lancet guiding unit comprises a lancet socket with a guide that passes through a first opening in a transverse partition of the mechanism body, from a lancet chamber at a front end of the lancet guiding unit to the driving sleeve at a back end of the lancet guiding unit,
• wherein the driving sleeve as a whole is configured to:
• rotate within the casing with respect to the mechanism body;
• slide within the casing, with respect to the mechanism body, toward the front end of the casing;
• and
• slide within the casing, with respect to the mechanism body, toward the back end of the casing;
• wherein the return spring is between the transverse partition of the mechanism body and the driving sleeve,
• wherein the drive spring is between the driving sleeve and the button,
• wherein the button is configured to rotate within the casing,
• wherein the member configured to release the tension of the drive spring is a latch of the driving sleeve, configured to cooperate with a stop surface of the mechanism body and an activating surface of the button, and
• wherein the puncture depth regulation mechanism comprises:
• the button, rotary-coupled with the driving sleeve and configured to rotate the driving sleeve;
• limiting steps formed in the back end of the mechanism body, wherein each of the limiting steps defines a relative puncture depth for selection by the driving sleeve;
• and
• a bumper portion of the driving sleeve configured to engage a selected one of the limiting steps, upon rotation of the driving sleeve caused by rotating the button when selecting the relative puncture depth with respect to the limiting steps, in order to limit movement of the bumper portion when the driving sleeve slides toward the front end of the casing, and to select the relative puncture depth upon engagement between the bumper portion and the selected one of the limiting steps.