Pricking device for taking a blood sample

• US 8,828,039 B2
• Filed: 05/29/2009
• Issued: 09/09/2014
• Est. Priority Date: 06/06/2008
• Status: Active Grant

• Current Assignee: Gerresheimer Regensburg GmbH (Gerresheimer AG)
• Original Assignee: Gerresheimer Regensburg GmbH (Gerresheimer AG)
• Inventors: Butz, Marion, Knie, Andreas, Vaclav, Vojan
• Primary Examiner(s): SHI, KATHERINE MENGLIN
• Application Number:
  US12/996,218
• Publication Number:
  US 20110144683A1
• Time in Patent Office: 1,929 Days
• Field of Search: 606/167, 606/171, 606/181, 606/182, 606/185
• US Class Current: 606/182
• CPC Class Codes: A61B 5/1411 by percutaneous method, e.g. by lancet
• CPC Class Codes: A61B 5/1427 Multiple blood sampling, e.g. at periodic or pre-established intervals
• 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 5/15113 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 5/15128 comprising 2D- or 3D-shaped elements, e.g. cams, curved guide rails or threads comprising tooth-shaped elements A61B5/15132
• CPC Class Codes: A61B 5/1513 comprising linear sliding guides comprising tooth-shaped elements A61B5/15132
• 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

The invention relates to a pricking device (1) for taking a blood sample, comprising a movable holding device (5) for pricking means (4), means (12) for driving the movable holding device and a release device (19) for releasing the pricking movement (13) of the pricking means. When the release device has been manually actuated, the movable holding device can be axially moved by a spring force of a drive spring (9) of the drive means (12), and a tensing device (22) for tensing the drive spring. Said tensing device comprises a tensing mechanism (23) comprising means (24) for axially stopping the movable holding device during the tensing of the drive spring and means (25) for working during the tensing of the drive spring enabling said pricking device to be comfortable to use even when being used several times.

Claims

1. A pricking device (1) for taking a blood sample, comprising:

a moveable holder device (5) for a needle (4);

a drive means (12) comprising a drive spring (9) for driving the moveable holder device (5);

a trigger device (19) for triggering a pricking movement (13) of the needle (4), wherein after manual activation of the trigger device (19) the moveable holder device (5) can be moved axially by means of a spring force of the drive spring (9); and

a tensioning device (22) for tensioning the drive spring (9), wherein the tensioning device (22) comprises;

a tensioning mechanism (23) comprising a locking device (20) for axial locking of the moveable holder holding device (5) during tensioning of the drive spring (9); and

spring elements (25) for performing work during tensioning of the drive spring (9);

wherein the tensioning mechanism (23) comprises an axially moveable tensioning slide (11), wherein the axially moveable tensioning slide (11) has a sliding support and an arc-shaped curved track (7) that guides the moveable holder device (5) in a targeted manner;

wherein the drive spring (9) is coupled to the sliding support and the arc-shaped curved track (7);

wherein a coupling element (6) connects the arc-shaped curved track (7) and the moveable holder device (5); and

wherein a curved track follower (17) is mounted moveable inside a profile element of the arc-shaped curved track (7), such that the curved track follower (17) is configured to move radially along the arc-shaped curve track (7) upon activation of the trigger device (19).

2. Pricking device (1) according to claim 1, characterized in that the axially moveable tensioning slide (11) has a drive spring mounting.

3. Pricking device (1) according to claim 1, characterized in that the spring elements (25) for performing work comprise two coil springs (26, 27).

4. Pricking device (1) according to claim 1, characterized in that the spring elements (25) for performing work are bearing a tensioning head (10) of the tensioning device (22) sprung-mounted on a base body (2) of the pricking device (1).

5. Pricking device (1) according to claim 1, characterized in that the spring elements (25) for performing work have a working spring force F_D and the drive spring (9) has a drive spring force F_s, wherein the working spring force F_D is greater than the drive spring force F_s.

6. Pricking device (1) according to claim 1, characterized in that the curved track follower (17) has a forward drive by means of which the curved track follower (17) can be moved along the arc-shaped curved track in a first direction.

7. Pricking device (1) according to claim 1, characterized in that the curved track follower (17) has a reverse drive by means of which the curved track follower (17) can be moved along the arc-shaped curved track along in a second direction opposite the first direction.

8. A pricking device (1) for taking a blood sample, comprising:

a moveable holder device (5) for a needle (4);

a drive means (12) comprising a torsional drive spring (9) for driving the moveable holder device (5) axially;

an arc-shaped curved track (7) that guides the moveable holder device (5) in a targeted manner, wherein a coupling element (6) connects the arc-shaped curved track (7) and the moveable holder device (5);

a curved track follower mounted moveable inside a profile element of the arc-shaped track, such that the curved track follower is configured to move radially along the arc-shaped curve track upon activation of a trigger device; and

a tensioning device (22) for tensioning the torsional drive spring (9) comprising an axially moveable tensioning slide (11) attached to the arc-shaped curved track (7), wherein the torsional drive spring (9) is coupled to the tensioning slide (11) and the arc-shaped curved track (7), wherein the tensioning device (22) comprises at least one coil spring element (25) for performing work during tensioning of the torsional drive spring (9).

9. The pricking device (1) according to claim 8, wherein the at least one coil spring (25) comprises two coil springs (26, 27).