Lancing device

• US 9,375,175 B2
• Filed: 11/14/2013
• Issued: 06/28/2016
• Est. Priority Date: 08/04/2005
• Status: Active Grant

• Current Assignee: Ascensia Diabetes Care Holdings AG (PHC Holdings Corporation)
• Original Assignee: Ascensia Diabetes Care Holdings AG (PHC Holdings Corporation)
• Inventors: Ruan, Tieming, Hoover, Scott
• Primary Examiner(s): Eastwood, David C
• Application Number:
  US14/080,509
• Publication Number:
  US 20140074139A1
• Time in Patent Office: 957 Days
• Field of Search: 606/167, 606181-183, 606185-189, 600/573, 600/583, 604/110, 604136-138, 301/51, 30335-339
• 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 5/150152 by an adequate mechanical impact on the puncturing location
• 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 5/150549 Protectors removed by rotational movement, e.g. torsion or screwing
• 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 5/150824 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
• 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 mechanism is adapted to move between a resting, cocking and a puncture position. The lancing mechanism comprises a lancet holder adapted to receive a lancet, a shaft attached to the lancet holder, at least one drive spring and at least one damping spring. The drive spring surrounds at least a portion of the shaft and drives the lancing mechanism from the cocking position to the puncture position. The damping spring moves the lancing mechanism from the puncture position to the resting position. The drive spring is located at least partially within the damping spring.

Claims

1. A lancing mechanism configured to move between a resting position, a cocking position, and a puncture position comprising:

a lancet holder including a body with an aperture configured to receive a lancet assembly at least partially therein;

a shaft attached to the lancet holder;

at least one drive spring having a number of coils surrounding at least a portion of the shaft, the at least one drive spring being configured to drive the lancing mechanism from the cocking position to the puncture position;

at least one damping spring having a number of coils surrounding at least a portion of the shaft, the at least one damping spring being directly attached to the lancet holder, the at least one damping spring being configured to move the lancing mechanism from the puncture position to the resting position, the at least one drive spring being located at least partially within the number of coils of the at least one damping spring during each of the puncture position, the resting position, and the cocking position.

2. The lancing mechanism of claim 1, wherein a spring rate of the at least one drive spring is greater than a spring rate of the at least one damping spring.

3. The lancing mechanism of claim 1, wherein the at least one damping spring is a single damping spring.

4. A lancing mechanism configured to move between a resting position, a cocking position, and a puncture position comprising:

a lancet holder including a body with an aperture configured to receive a lancet assembly at least partially therein;

a shaft attached to the lancet holder;

at least one drive spring having a number of coils surrounding at least a portion of the shaft, the at least one drive spring being configured to drive the lancing mechanism from the cocking position to the puncture position;

at least one damping spring having a number of coils surrounding at least a portion of the shaft, the at least one damping spring being configured to contract from a stretched position toward a neutral position thereby moving the lancing mechanism from the puncture position to the resting position, the at least one drive spring being located at least partially within the number of coils of the at least one damping spring.

5. The lancing mechanism of claim 4, wherein the at least one damping spring is a single damping spring.

6. The lancing mechanism of claim 5, wherein a spring rate of the at least one drive spring is greater than a spring rate of the at least one damping spring.

7. A lancing mechanism configured to move between a resting position, a cocking position, and a puncture position comprising:

a lancet holder including a body with an aperture configured to receive a lancet assembly at least partially therein;

a shaft attached to the lancet holder;

at least one drive spring having a number of coils surrounding at least a portion of the shaft, the at least one drive spring being configured to drive the lancing mechanism from the cocking position to the puncture position;

at least one damping spring having a number of coils surrounding at least a portion of the shaft, the at least one damping spring being an extension spring, the at least one damping spring being configured to move the lancing mechanism from the puncture position to the resting position, the at least one drive spring being located at least partially within the number of coils of the at least one damping spring during each of the puncture position, the resting position, and the cocking position.

8. The lancing mechanism of claim 7, wherein the at least one damping spring is attached to the lancet holder.

9. The lancing mechanism of claim 7, wherein a spring rate of the at least one drive spring is greater than a spring rate of the at least one damping spring.

10. The lancing mechanism of claim 7, wherein the at least one damping spring is a single damping spring.

12. The lancing mechanism of claim 7, wherein the at least one damping spring is attached to the lancet holder and wherein the at least one damping spring is a single damping spring.

11. A lancing mechanism configured to move between a resting position, a cocking position, and a puncture position comprising:

a lancet holder including a body with an aperture configured to receive a lancet assembly at least partially therein;

a shaft attached to the lancet holder;

at least one drive spring having a number of coils surrounding at least a portion of the shaft, the at least one drive spring being configured to drive the lancing mechanism from the cocking position to the puncture position;

at least one damping spring having a number of coils surrounding at least a portion of the shaft, the at least one damping spring being configured to move the lancing mechanism from the puncture position to the resting position, the at least one drive spring being located at least partially within the number of coils of the at least one damping spring during each of the puncture position, the resting position, and the cocking position, wherein a spring rate of the at least one drive spring is greater than a spring rate of the at least one damping spring.