Blood lancet system for withdrawing blood for diagnostic purposes

A blood lancet device comprising:

• a lancet including a tip,
• a housing including an outlet opening for the tip and a contact surface around the outlet opening,
• a lancet holder being movable in the housing along a path,
• a lancet guide formed to guide the lancet holder along the path,
• a pressure element,
• a lancet drive including a rotor driven by a spring in a sense of rotation, the rotor having a pressure surface extending about a rotation axis and being formed to contact the pressure element, the pressure surface running with varying center distance around the rotation axis and having a vertex with a maximum center distance from the rotation axis and a propelling section following the vertex against the sense of rotation with a center distance decreasing against the sense of rotation and the spring acting onto the pressure element to effect a pressure against the propelling section of the pressure surface with a component in a radial direction to the rotation axis to drive rotation of the pressure surface about the rotation axis, and
• an output-side coupling mechanism coupling the rotor with the lancet holder so that movement of the pressure element across the propelling section is converted into movement of the lancet holder along the path in a pricking direction.

A blood lancet device comprising:

• a lancet including a tip,
• a housing including an outlet opening for the tip and a contact surface around the outlet opening,
• a lancet holder being movable in the housing along a path,
• a lancet guide formed to guide the lancet holder along the path,
• a pressure element,
• a lancet drive including a rotor driven by a spring in a sense of rotation, the rotor having a pressure surface extending about a rotation axis and being formed to contact the pressure element, the pressure surface having a vertex with a maximum center distance from the rotation axis and a propelling section following the vertex against the sense of rotation and the spring acting onto the pressure element to effect a pressure against the propelling section of the pressure surface with a component in a radial direction to the rotation axis to drive rotation of the pressure surface about the rotation axis, the propelling section having a convex shape in at least a partial section thereof, and
• an output-side coupling mechanism coupling the rotor with the lancet holder so that movement of the pressure element across the propelling section is converted into movement of the lancet holder along the path in a pricking direction.

A blood lancet device comprising:

• a lancet including a tip,
• a housing including an outlet opening for the tip and a contact surface around the outlet opening,
• a lancet holder being movable in the housing along a path,
• a lancet guide formed to guide the lancet holder along the path,
• a pressure element,
• a lancet drive including a rotor driven by a spring in a sense of rotation, the rotor having a pressure surface extending about a rotation axis and being formed to contact the pressure element, the pressure surface having a vertex with a maximum center distance from the rotation axis and comprising a tensioning section preceding the vertex against the sense of rotation, the tensioning section having an increasing center distance against the sense of rotation and a propelling section following the vertex against the sense of rotation and the spring acting onto the pressure element to effect a pressure against the propelling section of the pressure surface with a component in a radial direction to the rotation axis to drive rotation of the pressure surface about the rotation axis, and
• an output-side coupling mechanism coupling the rotor with the lancet holder so that movement of the pressure element across the propelling section is converted into movement of the lancet holder along the path in a pricking direction.

A blood lancet device comprising:

• a lancet including a tip,
• a housing including an outlet opening for the tip and a contact surface around the outlet opening,
• a lancet holder being movable in the housing along a path,
• a lancet guide formed to guide the lancet holder along the path,
• a pressure element,
• a lancet drive including a rotor driven by a spring in a sense of rotation, the rotor having a pressure surface extending about a rotation axis and being formed to contact the pressure element, the pressure surface having at least two vertexes with a maximum center distance from the rotation axis and a propelling section following the vertex against the sense of rotation and the spring acting onto the pressure element to effect a pressure against the propelling section of the pressure surface with a component in a radial direction to the rotation axis to drive rotation of the pressure surface about the rotation axis, and
• an output-side coupling mechanism coupling the rotor with the lancet holder so that movement of the pressure element across the propelling section is converted into movement of the lancet holder along the path in a pricking direction.

A blood lancet device comprising:

• a lancet including a tip,
• a housing including an outlet opening for the tip and a contact surface around the outlet opening,
• a lancet holder being movable in the housing along a path,
• a lancet guide formed to guide the lancet holder along the path,
• a pressure element,
• a lancet drive including a rotor driven by a spring in a sense of rotation, the rotor having a pressure surface extending about a rotation axis and being formed to contact the pressure element, the pressure surface being a continuous surface completely surrounding the axis and having a vertex with a maximum center distance from the rotation axis and a propelling section following the vertex against the sense of rotation and the spring acting onto the pressure element to effect a pressure against the propelling section of the pressure surface with a component in a radial direction to the rotation axis to drive rotation of the pressure surface about the rotation axis, and
• an output-side coupling mechanism coupling the rotor with the lancet holder so that movement of the pressure element across the propelling section is converted into movement of the lancet holder along the path in a pricking direction.

A blood lancet device comprising:

• a lancet including a tip,
• a housing including an outlet opening for the tip and a contact surface around the outlet opening,
• a lancet holder being movable in the housing along a path and including a pivot,
• a lancet guide formed to guide the lancet holder along the path,
• a pressure element,
• a lancet drive including a rotor driven by a spring in a sense of rotation, the rotor having a pressure surface extending about a rotation axis and being formed to contact the pressure element, the pressure surface having a vertex with a maximum center distance from the rotation axis and a propelling section following the vertex against the sense of rotation and the spring acting onto the pressure element to effect a pressure against the propelling section of the pressure surface with a component in a radial direction to the rotation axis to drive rotation of the pressure surface about the rotation axis, and
• an output-side coupling mechanism coupling the rotor with the lancet holder so that movement of the pressure element across the propelling section is converted into movement of the lancet holder along the path in a pricking direction and including an operating cam in mesh with the pivot, so that at least a part of the pricking and retraction movement is determined by a rotation movement of the operating cam.

A blood lancet device comprising:

• a lancet including a tip,
• a housing including an outlet opening for the tip and a contact surface around the outlet opening,
• a lancet holder being movable in the housing along a path,
• a lancet guide formed to guide the lancet holder along the path,
• a pressure element,
• a lancet drive including a rotor driven by a spring in a sense of rotation, the rotor including a thrust piece and having a pressure surface extending about a rotation axis and being formed to contact the pressure element, the pressure surface having a vertex with a maximum center distance from the rotation axis and a propelling section following the vertex against the sense of rotation and the spring acting onto the pressure element to effect a pressure against the propelling section of the pressure surface with a component in a radial direction to the rotation axis to drive rotation of the pressure surface about the rotation axis,
• a tensioning lever formed to effect a torque in the sense of rotation onto the thrust piece, and
• an output-side coupling mechanism coupling the rotor with the lancet holder so that movement of the pressure element across the propelling section is converted into movement of the lancet holder along the path in a pricking direction.

A blood lancet device comprising:

• a lancet including a tip,
• a housing including an outlet opening for the tip, a contact surface around the outlet opening, a lower end and an end piece that is articulated to the lower end of the housing with a hinge,
• a lancet holder being movable in the housing along a path,
• a lancet guide formed to guide the lancet holder along the path,
• a pressure element,
• a lancet drive including a rotor driven by a spring in a sense of rotation, the rotor having a pressure surface extending about a rotation axis and being formed to contact the pressure element, the pressure surface having a vertex with a maximum center distance from the rotation axis and a propelling section following the vertex against the sense of rotation and the spring acting onto the pressure element to effect a pressure against the propelling section of the pressure surface with a component in a radial direction to the rotation axis to drive rotation of the pressure surface about the rotation axis, and
• an output-side coupling mechanism coupling the rotor with the lancet holder so that movement of the pressure element across the propelling section is converted into movement of the lancet holder along the path in a pricking direction.