LANCET WHEEL AND METHOD FOR PRODUCING A LANCET WHEEL

• US 20110015661A1
• Filed: 09/28/2010
• Published: 01/20/2011
• Est. Priority Date: 05/03/2008
• Status: Active Grant

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Inventors: Keil, Michael
• Granted Patent: US 9,066,689 B2
• Time in Patent Office: Days
• US Class Current: 606/181
• 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 5/150259 Improved gripping, e.g. with high friction pattern or projections on the housing surface or an ergonometric shape
• CPC Class Codes: A61B 5/150282 for piercing elements, e.g. blade, lancet, canula, needle
• CPC Class Codes: A61B 5/150435 Specific design of proximal end
• 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 5/150572 Pierceable protectors, e.g. shields, caps, sleeves or films, e.g. for hygienic purposes
• 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 5/15117 comprising biased elements, resilient elements or a spring, e.g. a helical spring, leaf spring, or elastic strap
• CPC Class Codes: A61B 5/15128 comprising 2D- or 3D-shaped elements, e.g. cams, curved guide rails or threads comprising tooth-shaped elements A61B5/15132
• CPC Class Codes: A61B 5/15146 Devices loaded with multiple lancets simultaneously, e.g. for serial firing without reloading, for example by use of stocking means. multiple simultaneous cutting or piercing A61B5/150977
• CPC Class Codes: A61B 5/15153 Multiple piercing elements stocked in a single compartment
• CPC Class Codes: A61B 5/15163 Characterized by propelling the piercing element in an axial direction relative to the disc
• CPC Class Codes: Y10T 29/49986 Subsequent to metal working

Abstract

The invention relates to a lancet wheel comprising multiple annularly positioned lancets (3), which have a lancet body (3b) that is made of metal and ends in a lancet tip (3a), and a carrier (5), to which the lancets (3) are connected via radially running webs (6), which allow raising of the lancets (3) into the usage position. According to the invention, it is provided that the lancets (3) are radially aligned, and the webs (6) have a plastic body, which predefine an intended bending point, around which the webs (6) are bent to raise the lancets (3). Furthermore, the invention relates to a method for producing a lancet wheel.

Claims

1. A lancet wheel comprising:

multiple annularly positioned lancets, which have a lancet body that is made of metal and ends in a lancet tip, and

a carrier, to which the lancets are connected via radially running webs, which allow raising of the lancets into a usage position,

characterized in that the lancets are radially aligned and the webs have a plastic body, which predefines an intended bending point, around which the webs are bent to raise the lancets.

2. The lancet wheel according to claim 1, characterized in that the intended bending point is implemented as a notch in the plastic body.

3. The lancet wheel according to claim 1, characterized in that a metal web originating from the lancet body is embedded in the plastic body.

4. The lancet wheel according to claim 3, characterized in that the metal web extends through the intended bending point.

5. The lancet wheel according to claim 4, characterized in that the plastic body is wider at the intended bending point on the metal web, preferably at least twice as wide, in particular at least three times as wide.

6. The lancet wheel according to claim 3, characterized in that the carrier has a metal disk, to which the metal webs originating from the lancets lead.

7. The lancet wheel according to claim 1, characterized in that the carrier has a plastic body, which merges into the plastic bodies of the webs.

8. The lancet wheel according to claim 1, characterized in that the carrier has a ring, which encloses the lancets.

9. The lancet wheel according to claim 1, characterized in that the webs are elastically bendable around the intended bending point, so that a raised lancet passes into a flat location from the usage position without external force action.

10. The lancet wheel according to claim 1, characterized in that the carrier has a stop on one side of the lancet wheel, which only permits raising of the lancets in one direction.

11. A method for producing a lancet wheel, which comprises multiple annularly positioned lancets, comprising the following steps:

producing a lancet wheel blank from metal, the lancet wheel blank comprising annularly positioned lancets, which are connected via metal webs and have a lancet body that is made of metal and ends in a tip, and

injection molding a plastic coating around the lancet wheel blank.

12. The method according to claim 11, characterized in that the lancet wheel blank is made of sheet metal.

13. The method according to claim 11, characterized in that a carrier body comprising a ring, which encloses the lancets, is made by the injection molding of plastic around the lancet wheel blank.

14. The method according to claim 11, characterized in that a carrier body comprising a coupling element for coupling on an advance unit of a lancing device, using which the lancets of the lancet wheel may be moved one after another into the usage position, is made by the injection molding of plastic around the lancet wheel blank.

15. The method according to claim 11, characterized in that at least the metal webs of the lancet wheel blank originating from the lancet bodies are coated by injection molding.