LANCET ASSEMBLY

• US 20100125294A1
• Filed: 11/17/2008
• Published: 05/20/2010
• Est. Priority Date: 11/17/2008
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: YASUI, Shinichi
• Application Number:
  US12/272,086
• Publication Number:
  US 20100125294A1
• Time in Patent Office: Days
• US Class Current: 606/182
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• 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 5/150702 fully automatically removed, i.e. the removing does not require any action by the user
• CPC Class Codes: A61B 5/150885 Preventing re-use
• CPC Class Codes: A61B 5/15111 Semi-automatically triggered, e.g. at the end of the cocking procedure, for instance by biasing the main drive spring or when reaching sufficient contact pressure, the piercing device is automatically triggered without any deliberate action by the user
• 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 5/15142 Devices intended for single use, i.e. disposable
• CPC Class Codes: A61B 5/15144 comprising driving means, e.g. a spring, for retracting the piercing unit into the housing

Abstract

A lancet assembly 100 comprises a lancet 1 which has a puncture element at its one end, a cap 6 which covers the puncture element, a holder 40 which movably holds the lancet 1, a pressing lever 30 which drives the lancet 1, and an ejector 20 which urges the lancet 1 and drives the lancet 1 in accordance with the operation of the pressing lever 30, and the lancet assembly 100 is configured such that the cap 6 is engaged with the pressing lever 30 and moved in the ejection direction of the lancet 1 to be separated from the lancet 1.

Claims

1. A lancet assembly including a lancet which has a puncture element at its one end, a cap which covers the puncture element, a holder which movably holds the lancet, a pressing lever which drives the lancet in its ejection direction, and an ejector which urges the lancet and drives the lancet in accordance with the operation of the pressing lever, wherein

when the ejector is operated, the pressing lever and the cap are engaged with each other and thereby the cap is moved in the ejection direction to be separated from the lancet.

2. A lancet assembly as defined in claim 1, wherein

said lancet comprises a resin molded body which houses the puncture element, and

said puncture element is coated with a resin at its exposed portion, and a notch is provided at a predetermined portion of the resin, said predetermined portion being to be broken,

said lancet assembly being separable into two parts including the cap which covers the exposed portion and the lancet which holds the puncture element.

3. A lancet assembly as defined in claim 1, wherein

said ejector ejects the lancet, and pulls the lancet back to a predetermined position after the lancet was ejected.

4. A lancet assembly as defined in claim 1, wherein

said holder includes a guide member which makes the lancet linearly move, a guide member which makes the pressing lever move, and a trigger which restrains the lancet until the pressing lever reaches a predetermined position and triggers the lancet to eject after the reaching.

5. A lancet assembly as defined in claim 1, wherein

after the pressing lever being moved in the lancet ejection direction is contacted with the cap of the lancet which is restrained by the holder, the cap is moved in the lancet ejection direction thereby to break the notch to expose the puncture element.

6. A lancet assembly as defined in claim 2, wherein

after the pressing lever being moved in the lancet ejection direction is contacted with the cap of the lancet which is restrained by the holder, the cap is moved in the lancet ejection direction thereby to break the notch to expose the puncture element.

7. A lancet assembly as defined in claim 1, wherein

after the cap is separated from the lancet due to the movement of the pressing lever in the lancet ejection direction, the cap is ejected outward from the inner center position of the holder.

8. A lancet assembly as defined in claim 1, wherein

after the cap is separated from the lancet due to the movement of the pressing lever in the lancet ejection direction, the cap is moved along a guide provided in the holder due to further movement of the pressing lever to be departed from the lancet ejection path.

9. A lancet assembly as defined in claim 4, wherein

after the pressing lever having a part for releasing the trigger starts to move and thereby the trigger is moved to a second position, the lancet which has been restrained by the trigger is ejected.

10. A lancet assembly as defined in claim 1, wherein

a first pressing lever and a second pressing lever are provided as the pressing lever,

said first pressing lever moving the cap to separate the cap from the lancet, and

said second pressing lever starting its movement after the first pressing lever is operated, and ejecting the lancet.

11. A lancet assembly as defined in claim 1, wherein

said ejector comprises a spring element which is previously compressed or expanded, and is engaged with the holder at its one end and with an end portion of the lancet at its the other end.

12. A lancet assembly as defined in claim 3, wherein

said ejector comprises a spring element which is previously compressed or expanded, and is engaged with the holder at its one end and with an end portion of the lancet at its the other end.

13. A lancet assembly as defined in claim 1, wherein

said ejector comprises a resin or metal spring element which is, in its unloaded condition, engaged and attached to the pressing lever at its one end and to the lancet at its the other end, and is compressed or expanded in accordance with the movement of the pressing lever.

14. A lancet assembly as defined in claim 3, wherein

said ejector comprises a resin or metal spring element which is, in its unloaded condition, engaged and attached to the pressing lever at its one end and to the lancet at its the other end, and is compressed or expanded in accordance with the movement of the pressing lever.

15. A lancet assembly as defined in claim 10, wherein

said ejector comprises a spring element which is connected to the pressing lever at its one end and is engaged with the lancet at its the other end.

16. A lancet assembly as defined in claim 1, wherein said puncture element is needle-shaped.

17. A lancet assembly as defined in claim 2, wherein said puncture element is needle-shaped.

18. A lancet assembly as defined in claim 1, wherein said puncture element is blade-shaped.

19. A lancet assembly as defined in claim 2, wherein said puncture element is blade-shaped.

20. A lancet assembly as defined in claim 1, wherein

after the lancet is incorporated in the holder, the resin of the notch is cut or melted to be removed such that only a thin resin layer is formed around the puncture element, and the thin resin layer is broken by pushing the pressing lever to separate the cap from the lancet.