Blood sampling device and method of using the same

A lancing device comprising:

• a lancet connector for connecting with a lancet which comprises a lancet body and a needle fixed to and extending from the lancet body;
• a reciprocating actuator operably connected to the lancet connector and configured to cause a linear reciprocating motion of the lancet connector along an axis, wherein the reciprocating actuator comprises a spring for storing spring energy;
• a trigger configured to trigger the reciprocating actuator for causing the linear reciprocating motion of the lancet connector;
• a lancing device body comprising a main body portion, a lancet receiving portion and a tip portion that are arranged in order along the axis and integrated to form a single body;
• the main body portion being configured for gripping with one hand of a person;
• the tip portion comprising a skin contact surface for contacting a skin area from which blood is to be sampled;
• the lancet receiving portion interposed between the main body portion and the tip portion therebetween;
• and
• a handle operably connected to the reciprocating actuator and is configured to move along the axis for storing spring energy in the spring of the reciprocating actuator,
• wherein the reciprocating actuator comprises a cam configured to rotate about a cam axis and a cam follower operably connected to the cam to move back and forth along the axis, wherein the lancet connector is operably connected to the cam follower for the linear reciprocating motion,
• wherein the reciprocating actuator further comprises a rack gear elongated generally in the axis and a pinion gear engaged with the rack gear, wherein the pinion gear is operably engaged with the rack gear and further operably connected to the cam such that sliding of the rack gear along the axis causes rotation of the pinion gear which further causes rotation of the cam about the cam axis.

A lancing device comprising:

• a lancet connector for connecting with a lancet which comprises a lancet body and a needle fixed to and extending from the lancet body;
• a reciprocating actuator operably connected to the lancet connector and configured to cause a linear reciprocating motion of the lancet connector along an axis;
• a trigger configured to trigger the reciprocating actuator for causing the linear reciprocating motion of the lancet connector;
• a lancing device body comprising a main body portion, a lancet receiving portion and a tip portion that are arranged in order along the axis and integrated to form a single body;
• the main body portion being configured for gripping with one hand of a person;
• the tip portion comprising a skin contact surface for contacting a skin area from which blood is to be sampled;
• the lancet receiving portion interposed between the main body portion and the tip portion there between;
• and
• a handle disposed outside the lancing device body such that the handle, the main body portion and the lancet receiving portion are arranged in order along the axis, wherein the reciprocating actuator comprises a spring for storing spring energy,
• wherein the handle operably connected to the reciprocating actuator and is configured for pulling away from the main body portion along the axis, which is to store spring energy in the spring of the reciprocating actuator,
• wherein the reciprocating actuator further comprises a zigzag guide member, and an arm operably connected to the zigzag guide member,
• wherein the axis is referred to as a first axis hereinafter, wherein the zigzag guide member is configured to slide in a forward direction and in a backward direction along the first axis,
• wherein the forward direction is from the main body portion to the tip portion along the first axis, and the backward direction is from the tip portion to the main body portion along the first axis,
• wherein the zigzag guide member is operably connected to the spring such that, when the zigzag guide member moves in the backward direction, the spring is to be compressed and store spring energy, and further such that, as the spring energy is released, the spring is to extend and move the zigzag guide member in the forward direction,
• wherein the zigzag guide member comprises a zigzag guide,
• wherein the arm comprises a first connection portion hingedly connected with the lancet connector for hinged rotation relative to the lancet connector about a second axis generally perpendicular to the first axis,
• wherein the arm comprises a second connection portion distanced from the first connection portion and engaged with the zigzag guide such that the second connection portion is to travel along the zigzag guide as the zigzag guide member moves in the forward direction and in the backward direction along the first axis,
• wherein the arm further comprises a third connection portion distanced from the first connection portion and engaged with a linear guide that is provided inside the main body portion and extends in a third axis generally perpendicular to the first axis and further to the second axis such that the third connection portion is to travel along the linear guide between two lateral positions in the third axis,
• wherein the trigger is configured to initiate a release of the spring energy,
• wherein when the spring energy is released, the zigzag guide member slides in the forward direction, which causes the second connection portion to travel relative to the zigzag guide member along the zigzag guide, which further causes the hinged rotation of the arm about the second axis relative to the lancet connector, while the third connection portion of the arm travels along the linear guide between the two lateral positions in the third axis, which further causes the arm to push the lancet connector in the forward direction and pull the lancet connector in the backward direction to make the linear reciprocating motion of the lancet connector.

A lancing system comprising:

• a lancet connector for connecting with a lancet which comprises a lancet body and a needle fixed to and extending from the lancet body;
• a reciprocating actuator operably connected to the lancet connector and configured to cause a linear reciprocating motion of the lancet connector along an axis;
• a trigger configured to trigger the reciprocating actuator for causing the linear reciprocating motion of the lancet connector;
• a lancing device body comprising a main body portion, a lancet receiving portion and a tip portion that are arranged in order along the axis and integrated to form a single body;
• the main body portion being configured for gripping with one hand of a person;
• the tip portion comprising a skin contact surface for contacting a skin area from which blood is to be sampled, the tip portion further comprising an opening through which the needle is to travel;
• and
• the lancet receiving portion interposed between the main body portion and the tip portion there between,
• wherein the lancet connector comprises an engagement portion configured to connect with a counterpart component of the lancet body for integrating the lancet with the lancet connector,
• wherein, upon integrating the lancet with the lancet connector without triggering the reciprocating actuator, the lancet is generally located in or on the lancet receiving portion of the lancing device body, in which the needle extends in a forward direction away from the main body portion along the axis but does not extend beyond the skin contact surface in the forward direction such that a distal end of the needle does not stab the skin area even if the tip portion is place on the skin area,
• wherein, in response to triggering the reciprocating actuator once with the trigger, the reciprocating actuator is to cause the linear reciprocation motion of the lancet connector along the axis multiple times such that, when the lancet is integrated with the lancet connector, the lancet advances in the forward direction and retreats in a backward direction toward the main body portion along the axis, by which the distal end of the needle travels in the forward direction and in the backward direction multiple times through the opening between an advanced position and a withdrawn position,
• wherein at the advanced position, the distal end of the needle is beyond the skin contact surface in the forward direction such that the needle could pierce the skin area if the skin area contacts the skin contact surface with the axis generally perpendicular to an imaginary plane of the skin area, wherein at the withdrawn position, the distal end of the needle is closer to the main body portion along the axis than at the advanced position such that the needle could not pierce the skin area even if the skin area contacts the skin contact surface with the axis generally perpendicular to the imaginary plane of the skin area,
• wherein the reciprocating actuator comprises a cam configured to rotate about a cam axis and a cam follower operably connected to the cam to move in the forward direction and the backward direction along the axis, wherein the lancet connector is operably connected to the cam follower for the linear reciprocating motion,
• wherein the reciprocating actuator further comprises a rack gear elongated generally in the axis and a pinion gear engaged with the rack gear, wherein the pinion gear is operably engaged with the rack gear and further operably connected to the cam such that sliding of the rack gear along the axis causes rotation of the pinion gear which further causes rotation of the cam about the cam axis,
• wherein the reciprocating actuator further comprises a handle disposed outside the main body portion and configured for pulling in the backward direction along the axis relative to the lancing device body, wherein the handle is connected to the rack gear for sliding the rack gear in the backward direction relative to the pinion gear when the handle is pulled in the backward direction.