Body fluid measuring instrument and body fluid sampler thereof

A body fluid measuring apparatus comprising a main body and a body fluid sampler fitted to the main body,

• wherein the body fluid sampler comprises a fixed member fixed to the main body and a movable member guided by the fixed member, the fixed member being formed with a through-hole, the movable member comprising a lancet, the movable member being reciprocatively movable for bringing a tip of the lancet into and out of a tip of the fixed member,
• wherein the lancet comprises a tube, an axial core inserted therein, and an insulator for electrically separating the tube and the core, the tube serving as a first electrode, the axial core serving as a second electrode, the tip of the lancet being provided with a reactive reagent for measurement, and
• wherein the main body comprises an electronic circuit for providing a measurement on the basis of an electrical signal from the tube and the axial core, and a drive mechanism which drives the movable member for causing the tip of the lancet to project from the tip of the fixed member.

A body fluid sampler mounted, in use, on a body fluid measuring apparatus, comprising:

• a fixed member and a movable member guided by the fixed member, the fixed member being formed with a body fluid-sucking chamber open at a tip of the fixed member and a through-hole communicating therewith, the movable member comprising a lancet acting as a first electrode, the movable member being reciprocatively movable for bringing a tip of the lancet into and out of the tip of the fixed member, the body fluid-sucking chamber being provided with a second electrode and a reactive layer containing a reactive reagent necessary for measurement,
• wherein the fixed member comprises a cylindrical electrode acting as the second electrode and an insulator for electrically separating the cylindrical electrode from the lancet, the cylindrical electrode and the lancet being concentrically arranged, and
• wherein a surface of the insulator facing the lancet is hydrophobically treated.

A body fluid sampler mounted, in use, on a body fluid measuring apparatus, comprising:

• a fixed member and a movable member guided by the fixed member, the fixed member being formed with a through-hole, the movable member comprising a lancet, the movable member being reciprocatively movable for bringing a tip of the lancet into and out of a tip of the fixed member,
• wherein the lancet comprises a tube, an axial core inserted therein, and an insulator for electrically separating the tube and the core, the tube serving as a first electrode, the axial core serving as a second electrode, the tip of the lancet being provided with a reactive reagent for measurement.

A body fluid measuring apparatus comprising a main body and a body fluid sampler fitted to the main body,

• wherein the body fluid sampler comprises a fixed member fixed to the main body and a movable member guided by the fixed member, the fixed member being formed with a body fluid-sucking chamber open at a tip of the fixed member and a through-hole communicating therewith, the movable member comprising a lancet acting as a first electrode, the movable member being reciprocatively movable for bringing a tip of the lancet into and out of the tip of the fixed member, the body fluid-sucking chamber being provided with a second electrode and a reactive layer containing a reactive reagent necessary for measurement,
• wherein the main body comprises an electronic circuit for providing a measurement on the basis of an electrical signal from the lancet as the first electrode and the second electrode, and a drive mechanism which drives the movable member for causing the tip of the lancet to project from the tip of the fixed member, and
• wherein the main body has an annular spring terminal for electrically connecting the second electrode to the electronic circuit, the fixed member of the body fluid sampler being detachably fixed to the main body under urging of the annular spring terminal.

A body fluid measuring apparatus comprising a main body and a body fluid sampler fitted to the main body,

• wherein the body fluid sampler comprises a fixed member fixed to the main body and a movable member guided by the fixed member, the fixed member being formed with a body fluid-sucking chamber open at a tip of the fixed member and a through-hole communicating herewith, the movable member comprising a lancet acting as a first electrode, the movable member being reciprocatively movable for bringing a tip of the lancet into Ada out of the tip of the fixed member, the body fluid-sucking chamber being provided with a second electrode and a reactive layer containing a reactive reagent necessary for measurement,
• wherein the main body comprises an electronic circuit for providing a measurement on the basis of an electrical signal from the lancet as the first electrode and the second electrode, and a drive mechanism which drives the movable member for causing the tip of the lancet to project from the tip of the fixed member, and
• wherein the fixed member is provided with an air-vent hole for enabling the fluid-sucking chamber to communicate with an external space.