TWIST-TO-CHARGE MECHANISM OF LANCING DEVICE
First Claim
1. A lancing device for propelling a lancet through a lancing stroke, the lancing device comprising:
- a housing including an axial bore;
a lancet carrier translational within the housing through the lancing stroke, the lancet coupleable to the lancet carrier;
a drive spring for propelling the lancet carrier through the lancing stroke; and
a charging mechanism including a first cam member, a second cam member, and a rotatable handle, wherein the first cam member is mounted within the housing, rotatable relative to the housing, and restricted from axial translation relative to the housing, the second cam member abuts the first cam member, is coupled to the lancet carrier to provide co-translation, and is restricted from rotation relative to the housing, and the rotatable handle is co-rotationally attached to the first cam member,wherein rotation of the handle rotates the first cam member therewith, causing the first cam member to rotate against the second cam member, which in response translates axially because it is restricted from rotation, thereby retracting the coupled-thereto lancet carrier to a charged position.
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Accused Products
Abstract
A lancing device includes a housing, a lancet carrier translational within the housing, a drive spring for propelling the lancet carrier through a translational lancing stroke, and a charging mechanism. The charging mechanism includes a first cam member that is rotatable relative to the housing, a second cam member that abuts the first cam member, is coupled to the lancet carrier, and is restricted from rotation relative to the housing, and a rotatable handle co-rotationally attached to the first cam member. Rotation of the handle rotates the first cam member with it, causing the first cam member to rotate against the second cam member, which in response traverses axially because it is restricted from rotation, thereby retracting the lancet carrier to a retracted or charged state.
61 Citations
20 Claims
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1. A lancing device for propelling a lancet through a lancing stroke, the lancing device comprising:
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a housing including an axial bore; a lancet carrier translational within the housing through the lancing stroke, the lancet coupleable to the lancet carrier; a drive spring for propelling the lancet carrier through the lancing stroke; and a charging mechanism including a first cam member, a second cam member, and a rotatable handle, wherein the first cam member is mounted within the housing, rotatable relative to the housing, and restricted from axial translation relative to the housing, the second cam member abuts the first cam member, is coupled to the lancet carrier to provide co-translation, and is restricted from rotation relative to the housing, and the rotatable handle is co-rotationally attached to the first cam member, wherein rotation of the handle rotates the first cam member therewith, causing the first cam member to rotate against the second cam member, which in response translates axially because it is restricted from rotation, thereby retracting the coupled-thereto lancet carrier to a charged position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A charging mechanism for a lancing device for propelling a lancet through a lancing stroke, the lancing device comprising a housing including an axial bore, a lancet carrier translational within the housing through the lancing stroke with the lancet coupled to the lancet carrier, and a drive spring for propelling the lancet carrier through the lancing stroke, the charging mechanism comprising:
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a first cam member mounted within the housing, rotatable relative to the housing, restricted from axial translation relative to the housing, and defining a first cam surface having a peak portion; a second cam member abutting the first cam member, coupled to the lancet carrier to provide co-translation, restricted from rotation relative to the housing, and defining a second cam surface having a peak portion; and a rotatable handle co-rotationally attached to the first cam member, wherein rotation of the handle rotates the first cam member therewith, causing the peak portion of the first cam surface to rotate against the second cam surface until it engages the peak portion of the second cam surface, which in response axially translates the second cam member because it is restricted from rotation, thereby retracting the coupled-thereto lancet carrier to a charged position. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A method of assembling a lancing device, the method comprising:
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positioning a drive spring on a portion of a lancet carrier; coupling the lancet carrier having the drive spring positioned thereon to a charging mechanism to form a subassembly; positioning the subassembly axially within a housing member having an internal bore extending therethrough; and coupling a retaining member to the housing; wherein all of the above steps are performed in a linear manner along an axis of the housing.
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Specification