LANCET DEVICE

• US 20100298856A1
• Filed: 07/28/2006
• Published: 11/25/2010
• Est. Priority Date: 07/29/2005
• Status: Active Grant

• Current Assignee: ARKRAY, Inc
• Original Assignee: ARKRAY, Inc
• Inventors: Fukuzawa, Masahiro
• Granted Patent: US 8,454,641 B2
• Time in Patent Office: Days
• US Class Current: 606/181
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150198 Depth adjustment mechanism at the proximal end of the carrier of the piercing element
• 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 5/150519 Details of construction of hub, i.e. element used to attach the single-ended needle to a piercing device or sampling device
• CPC Class Codes: A61B 5/150549 Protectors removed by rotational movement, e.g. torsion or screwing
• CPC Class Codes: A61B 5/150564 Protectors removed by pulling or pushing
• 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 5/150916 by blocking components, e.g. piston, driving device or fluid passageway
• 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 lancet device is configured for performing a puncture by mounting a lancet including a puncture needle to the tip of a puncture body holder. The lancet device has a simple configuration that makes it possible to strengthen the retaining force for retaining the lancet when the lancet is used. In the lancet device, an insertion portion of a puncture body that is inserted into a mounting portion of the puncture body holder is retained by means of the frictional force. A fastening member provided in a main body side makes contact with the outer peripheral portion of the mounting portion of the puncture body holder and inwardly fastens the mounting portion when the fastening member is moved in the puncture direction relative to the puncture body holder.

Claims

1. A lancet device that a lancet including a puncture needle is mounted to a tip thereof, the lancet device being configured to perform a puncture by moving the puncture needle forward in a puncture direction, the lancet device comprising:

the lancet;

a lancet holder including a mounting portion that a base end portion of the lancet is inserted thereinto, the mounting portion retaining the lancet; and

a fastening member being configured to make contact with an outer peripheral surface of the mounting potion of the lancet holder and fasten the lancet holder in a direction intersectional to the puncture direction when the fastening member is moved relative to the lancet holder in the puncture direction.

2. The lancet device according to claim 1, wherein

the outer diameter of the base end portion of the lancet and the inner diameter of the mounting portion of the lancet holder are formed in approximately the same dimension.

3. The lancet device according to claim 1, wherein

the outer peripheral surface of the mounting portion of the lancet holder and the fastening member are configured to make contact with each other by moving the lancet holder to the rear side in the puncture direction relative to the fastening member when the lancet holder is fastened.

4. The lancet device according to claim 3, wherein

the fastened state of the lancet holder is configured to be released by moving the lancet holder to the front side in the puncture direction with respect to the fastening member when the lancet is removed from the lancet holder.

5. The lancet device according to claim 3, wherein

a taper portion is formed in a tip of the mounting portion of the lancet holder on the front side in the puncture direction so that the outer diameter of the mounting portion becomes larger toward the front side in the puncture direction.

6. The lancet device according to claim 1, wherein

the outer peripheral surface of the mounting portion of the lancet holder and the fastening member are configured to make contact with each other by moving the fastening member to the rear side in the puncture direction relative to the lancet holder when the lancet holder is fastened.

7. The lancet device according to claim 6, wherein

the fastened state of the lancet holder is configured to be released by moving the fastening member to the front side in the puncture direction relative to the lancet holder when the lancet is removed from the lancet holder.

8. The lancet device according to claim 6, wherein a taper portion is formed in a tip of the fastening member on the front side in the puncture direction so that the inner diameter of the fastening member becomes smaller toward the front side in the puncture direction.

9. The lancet device according to claim 1, wherein

the fastening member is configured to elastically deform the mounting portion of the lancet holder making contact with the fastening member in a direction intersectional to the puncture direction when the lancet holder is fastened.

10. The lancet device according to claim 1, wherein

a portion of the base end portion of the lancet to be inserted into the mounting portion of the lancet holder is formed to have the uniform outer diameter in the puncture direction.

11. The lancet device according to claim 1, wherein the lancet comprises:

a puncture body;

a casing portion including a tubular portion and an opening, the tubular portion being configured to accommodate the puncture body so that the puncture body is allowed to move back and forth in the puncture direction, the opening being formed in an end portion of the casing portion on a protruding side of the puncture needle; and

an engaging portion being configured to retain the puncture body in the interior of the casing portion so that the puncture body is not allowed to move back and forth in the puncture direction when the puncture body is removed from the lancet holder, and

wherein the retaining force for retaining the lancet in the lancet holder after the lancet holder is fastened by the fastening member is smaller than the retaining force by the engaging portion.

12. The lancet device according to claim 11, wherein

the retaining force for retaining the lancet in the lancet holder after the lancet holder is fastened by the fastening member is larger than the force necessary for engaging the engaging portion.

13. The lancet device according to claim 1, further comprising an urging member, the urging member being provided between the fastening member and the lancet holder, the urging member being configured to apply the urging force toward the fastened side of the lancet holder in the puncture direction.

14. The lancet device according to claim 1, wherein

the lancet holder retains the base end portion of the lancet by means of the frictional force.

15. The lancet device according to claim 1, wherein

a groove portion is formed on the surface of the base end portion, the groove portion being formed along the puncture direction.

16. The lancet device according to claim 1, wherein

a plurality of concave-convex portions are formed on the surface of the base end portion.

17. The lancet device according to claim 1,

wherein the base end portion includes a concave portion, the concave portion being formed in a portion of the base end portion to be fastened by the fastening member, and

wherein the fastening member includes a convex portion, the concave portion being configured to engage with the concave portion.