Method of setting lancing member to lancing device, lancing device and cam mechanism

• US 7,879,057 B2
• Filed: 07/01/2003
• Issued: 02/01/2011
• Est. Priority Date: 07/02/2002
• Status: Expired due to Fees

• Current Assignee: ARKRAY, Inc
• Original Assignee: ARKRAY, Inc
• Inventors: Matsumoto, Daisuke, Sakata, Tetsuya
• Primary Examiner(s): Hindenburg; Max
• Assistant Examiner(s): DOUGHERTY, SEAN PATRICK
• Application Number:
  US10/519,881
• Publication Number:
  US 20050261716A1
• Time in Patent Office: 2,772 Days
• Field of Search: 606181-183, 606/184, 606/185, 600/583, 600/573, 600/584
• US Class Current: 606/182
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/1486 using enzyme electrodes, e.g. with immobilised oxidase
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150099 by negative pressure, other than vacuum extraction into a syringe by pulling on the piston rod or into pre-evacuated tubes
• CPC Class Codes: A61B 5/150358 Strips for collecting blood, e.g. absorbent optical reagent test strips G01N21/8483; chemical reagent test strips G01N33/4875, G01N33/52
• CPC Class Codes: A61B 5/150412 Pointed piercing elements, e.g. needles, lancets for piercing the skin blade-like piercing elements A61B5/150442
• CPC Class Codes: A61B 5/150503 Single-ended needles hollow piercing element tip design A61B5/150396, needle sets for catheters A61M25/06, needles for bringing media into the body A61M5/32
• CPC Class Codes: A61B 5/150618 Integrally moulded protectors, e.g. protectors simultaneously moulded together with a further component, e.g. a hub, of the piercing element
• CPC Class Codes: A61B 5/150717 manually removed
• CPC Class Codes: A61B 5/150725 removal procedure linked to further actions, e.g. cocking of the piercing device, which indicate that the piercing device is used or tempered
• CPC Class Codes: A61B 5/150732 Needle holders, for instance for holding the needle by the hub, used for example with double-ended needle and pre-evacuated tube,
• CPC Class Codes: A61B 5/150755 Blood sample preparation for further analysis, e.g. by separating blood components or by mixing
• CPC Class Codes: A61B 5/15113 Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button
• CPC Class Codes: A61B 5/15117 comprising biased elements, resilient elements or a spring, e.g. a helical spring, leaf spring, or elastic strap
• CPC Class Codes: A61B 5/1519 comprising driving means, e.g. a spring, for propelling the piercing unit
• CPC Class Codes: A61B 5/15194 fully automatically retracted, i.e. the retraction does not require a deliberate action by the user, e.g. by terminating the contact with the patient's skin

Abstract

A lancing member (2) is integrally provided with a cap (29) for covering a needle (21). Upon or after being attached to a holder (5) of a lancing device (A), the lancing member (2) is rotated relative to a cap (29) by a rotator (C). As a result, the boundary (28) between the cap (29) and the lancing member (2) is broken easily to expose the needle (21).

Claims

1. A cam mechanism for rotating a lancet relative to a cap, the lancet including a body and a lancing needle projecting from the body, the cap being initially integral with the body of the lancet and subsequently removable from the body by rotating the cap relative to the lancet, the cam mechanism comprising:

a cylindrical housing separate from the cap;

a movable member contained in the housing for moving reciprocally in first and second directions parallel to a longitudinal axis of the housing, the movable member holding the lancet and configured to allow the lancet to rotate relative to the cap that covers the lancing element of the lancet;

a first groove inclined relative to the axis of the housing and a second groove connected to the first groove and extending linearly in parallel to the axis of the housing, the first and the second grooves being provided at one of the housing and the movable member; and

a protrusion provided at the other one of the housing and the movable member, the protrusion extending into the first groove and the second groove;

wherein the protrusion moves in the first groove when the movable member moves in the first direction, and moves in the second groove when the movable member moves in the second direction.

2. A lancing device comprising:

a cylindrical housing;

a lancet holder that holds a lancet including a body and a lancing needle projecting from the body, the lancing needle being covered by a cap that is separate from the housing and initially integral with the body of the lancet, the lancet holder being reciprocally movable along a longitudinal axis of the housing;

a moving mechanism for advancing the lancet holder along the longitudinal axis of the housing; and

a cam mechanism for converting a retracting movement of the lancet holder along the longitudinal axis of the housing into rotation of the lancet holder and the lancet relative to the cap for removing the cap from the body of the lancet.

3. The lancing device according to claim 2, wherein the lancet holder holds the lancet in a manner such that the lancet holder and the lancet are not rotatable relative to each other,

wherein the cam mechanism causes the lancet holder to rotate together with the lancet.

4. The lancing device according to claim 2, wherein the cam mechanism includes a first groove which is provided on the housing and is inclined relative to the longitudinal axis of the housing, and a protrusion which is provided on the lancet holder and is fitted in the first groove.

5. The lancing device according to claim 4, wherein the cam mechanism further includes a second groove connected to the first groove and extending in parallel to the longitudinal axis of the housing, and

wherein the protrusion passes through the second groove when the lancet holder advances.

6. The lancing device according to claim 2, further comprising a holding portion for removably holding an analyzer used for analyzing a sample taken by a piercing process.

7. The lancing device according to claim 6, further comprising a control circuit for analyzing the sample using the analyzer.