Lancet release mechanism

• US 9,055,898 B2
• Filed: 03/03/2006
• Issued: 06/16/2015
• Est. Priority Date: 03/04/2005
• Status: Active Grant

• Current Assignee: Ascensia Diabetes Care Holdings AG (PHC Holdings Corporation)
• Original Assignee: Bayer Healthcare LLC (Bayer AG)
• Inventors: Zhong, Weiping, Wise, Ernest
• Primary Examiner(s): Holwerda, Kathleen
• Assistant Examiner(s): SIMPSON, SARAH A
• Application Number:
  US11/885,521
• Publication Number:
  US 20080195133A1
• Time in Patent Office: 3,392 Days
• Field of Search: 606/181, 606/182, 600/583
• US Class Current: 1/1
• CPC Class Codes: A61B 5/1411 by percutaneous method, e.g. by lancet
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150183 Depth adjustment mechanism using end caps mounted at the distal end of the sampling device, i.e. the end-caps are adjustably positioned relative to the piercing device housing for example by rotating or screwing
• CPC Class Codes: A61B 5/150259 Improved gripping, e.g. with high friction pattern or projections on the housing surface or an ergonometric shape
• 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 5/150816 by tactile feedback, e.g. vibration
• CPC Class Codes: A61B 5/150824 by visual feedback
• 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

Abstract

A lancing device comprises a lancet holder and a lancet-release mechanism. The lancet holder forms an aperture. The aperture is adapted to receive a lancet assembly therein. The lancet holder is adapted to move the lancet assembly between a resting position, a cocking position, and a puncture position. The lancet-release mechanism includes a release button located adjacent to and external from the lancing device and a beam attached to the release button. The beam extends into the lancing device and the lancet holder. The beam is adapted to engage the lancet assembly. The release button and attached beam are adapted to eject the lancet assembly from the lancet holder.

Claims

1. A lancing device comprising:

a lancet holder having an aperture, the aperture being configured to receive a lancet assembly therein, the lancet holder being configured to move the lancet assembly between a resting position, a cocking position, and a puncture position; and

a lancet-release mechanism including

(i) a release button located adjacent to and external from the lancing device,

(ii) a beam attached to the release button, the beam extending into the lancing device and the lancet holder, the beam being configured to engage the lancet assembly, and

(iii) a spring located adjacent to and engaging the beam, the spring being configured to contract as the lancet assembly is received by the lancet holder,

wherein the release button and the attached beam, along with the spring, are positioned to eject the lancet assembly from the lancet holder by biasing the beam against the lancet assembly, the biasing at least partially due to the spring expanding from a compressed state.

2. The lancing device of claim 1, further comprising an aperture formed in the lancing device, wherein the beam of the lancet-release mechanism extends into the lancing device through the aperture, the aperture allowing the beam to move as the lancet assembly is moved between the resting position, the cocking position, and the puncture position.

3. The lancing device of claim 1, wherein the spring is located between the lancet holder and a main housing of the lancing device.

4. The lancing device of claim 1, wherein the lancet-release mechanism further includes a tab extending from the beam opposite the release button, the tab extending perpendicular to the beam, the tab being configured to engage the lancet assembly.

5. The lancing device of claim 1, wherein the lancet holder includes an exterior shell that forms the aperture.

6. The lancing device of claim 1, wherein the release button of the lancet-release mechanism includes a depression that assists a user in engaging the release button.

7. The lancing device of claim 1, wherein the release button of the lancet-release mechanism includes tactile features that assist a user in engaging the release button.

8. The lancing device of claim 1, wherein the spring is configured to move in the same direction as the lancet assembly.

9. A method for ejecting a lancet assembly from a lancet holder, the method comprising the acts of:

providing a lancing device that includes a lancet holder having an aperture, the aperture being configured to receive a lancet assembly therein, the lancing device being configured to move the lancet assembly between a resting position, a cocking position, and a puncture position;

providing a lancet-release mechanism including

(i) a release button located adjacent to and external from the lancing device, and

(ii) a beam attached to the release button, the beam extending into the lancing device and the lancet holder, the beam being configured to engage the lancet assembly; and

providing a spring within the lancing device, the spring being configured to expand from a compressed state to assist moving the lancet-release mechanism in a similar general direction of movement as the lancet assembly thereby causing the lancet assembly to be ejected from the lancet holder of the lancing device and thereby reducing a force needed to be applied to the beam to cause the lancet assembly to be ejected from the lancet holder.

10. The method of claim 9, further comprising the act of forming an aperture in the lancing device such that the beam of the lancet-release mechanism extends into the lancing device through the aperture, the aperture being configured to allow the beam to move as the lancet assembly is moved between the resting position, the cocking position, and the puncture position.

11. The method of claim 9, wherein the spring is located between the lancet holder and a main housing of the lancing device.

12. The method of claim 9, wherein the spring is located adjacent to and engaging the beam, and further wherein the release button and the attached beam, along with the spring, are configured to eject the lancet assembly from the lancet holder.

13. A lancing device comprising:

a lancet holder forming an aperture, the aperture configured to receive a lancet assembly therein, the lancet holder configured to move the lancet assembly between a resting position, a cocking position, and a puncture position;

a lancet-release mechanism including

(i) a release button located adjacent to and external from the lancing device, and

(ii) a beam attached to the release button, the beam extending into the lancet holder, the beam configured to engage the lancet assembly; and

a spring located adjacent to and engaging the beam, the spring configured to expand from an initially compressed state to bias the lancet-release mechanism in a similar general direction of movement as the lancet assembly such that the beam of the lancet-release mechanism and the lancet assembly are in constant contact, thereby reducing a force needed to be applied to the beam to cause the lancet assembly to be ejected from the lancet holder.

14. The lancing device of claim 13, wherein the release button of the lancet-release mechanism includes a depression for assisting a use to engage the release button.

15. The lancing device of claim 13, wherein the release button of the lancet-release mechanism includes tactile features for assisting a user to engage the release button.

16. The lancing device of claim 13, further comprising an aperture formed in the lancing device, wherein the beam of the lancet-release mechanism extends into the lancing device through the aperture, the aperture allowing the beam to move as the lancet assembly is moved between the resting position, the cocking position, and the puncture position.

17. The lancing device of claim 13, wherein the spring is located between the lancet holder and a main housing of the lancing device.

18. The lancing device of claim 13, wherein the lancet-release mechanism further includes a tab extending from the beam opposite the release button, the tab extending perpendicular to the beam, the tab configured to engage the lancet assembly.

19. The lancing device of claim 13, wherein the spring is configured to move along a first axis that is generally parallel to a second axis located within the aperture, the lancet assembly configured to be movable along the second axis.