LANCET DEVICE

• US 20090036916A1
• Filed: 03/08/2007
• Published: 02/05/2009
• Est. Priority Date: 03/08/2006
• Status: Abandoned Application

• Current Assignee: ARKRAY, Inc
• Original Assignee: ARKRAY, Inc
• Inventors: Nishiyama, Hisashi, Fukuzawa, Masahiro
• Application Number:
  US12/280,769
• Publication Number:
  US 20090036916A1
• Time in Patent Office: Days
• US Class Current: 606/182
• 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 5/150587 by friction fit
• CPC Class Codes: A61B 5/150595 by snap-lock (i.e. based on axial displacement)
• 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 5/15186 Devices loaded with a single lancet, i.e. a single lancet with or without a casing is loaded into a reusable drive device and then discarded after use; drive devices reloadable for multiple use
• 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 includes a puncture needle that receives a biasing force applied by a coil spring and is projected toward the tip side, and is retracted by the biasing force applied by a return spring. In the lancet device a colliding part and the a collision receiving part are made to collide when the puncture needle is projected, and an abutting stopping member elastically deforms. The colliding part is a part of the lancet holder that holds a puncture needle. The collision receiving part is a part of the abutting stopping member. The contact part of the abutting stopping member moves in the direction of the colliding part and comes into contact with the colliding part by the elastic deformation of this abutting stopping member, and the force that retracts the lancet holder is weakened.

Claims

1. A lancet device comprising:

a lancet holder where a lancet that includes a puncture needle is attached from the front side in the puncture direction and also has a colliding part that includes a surface that intersects the puncture direction,

a first biasing part that applies a force that moves the lancet holder forward in the puncture direction,

a second biasing part that retracts the lancet holder that has been moved forward by applying a force that is smaller than the force applied by the first biasing part, and

an abutting stopping member that has a collision receiving part that collides with the colliding part and limits the forward motion of the lancet holder in the puncture direction when the lancet holder receives the force applied by the first biasing part and moves forward in the puncture direction, and a contact part that comes into contact with the colliding part due to the elastic deformation arising when the colliding part and the collision receiving part collide.

2. The lancet device according to claim 1 wherein

the contact part of the abutting stopping member has a first contact part and a second contact part disposed so as to be opposed to each other along the puncture direction, and

when the colliding part passes between the first contact part and the second contact part and collides with the collision receiving part, the abutting stopping member elastically deforms, and the side surfaces of the colliding part are inserted between the first contact part and the second contact part.

3. The lancet device according to claim 1 wherein an elastic body is provided between the colliding part and the collision receiving part.

4. The lancet device according to claim 1 wherein the first biasing part and the second biasing part are coil springs.

5. A lancet device comprising

a lancet holder has an elastic member that elastically deforms in a direction intersecting the puncture direction and includes a sloped surface sloped with respect to the puncture direction,

a first biasing part that applies a force that moves the lancet holder forward in the puncture direction,

a second biasing part that retracts the lancet holder that has moved forward by applying a force that is smaller than the force applied by the first biasing part, and

a pressing pressure part that comes into contact with the sloped surface on the elastic member and presses the elastic member in a direction intersecting the puncture direction when the lancet holder moves into the vicinity of the position of a state where the lancet holder can be projected by the first biasing part.

9. The lancet device according to claim 5 wherein

the pressing pressure part is a rib member that is formed in a case part inside which the lancet holder is inserted and extends in a direction intersecting the puncture direction.

10. The lancet device according to claim 5 wherein

the pressing pressure part is included in a puncture depth adjusting member that adjusts the puncture depth of a puncture needle attached to a tip of the lancet holder.

11. The lancet device according to claim 5 wherein

the lancet holder has a contact part that contacts with an end portion of the second biasing part when the lancet holder is moved forward in the puncture direction.

6. A lancet device comprising:

a lancet holder that has an elastic member that elastically deforms in a direction intersecting the puncture direction and includes a first sloped surface sloped with respect to the puncture direction and a second sloped surface with a slope angle larger than the first sloped surface,

a first biasing part that applies a force that moves the lancet holder forward in the puncture direction,

a second biasing part that retracts the lancet holder that has moved forward by applying a force that is smaller than the force applied by the first biasing part and

a pressing pressure part that comes into contact with the first sloped surface and the second sloped surface on the elastic member and presses the elastic member in a direction intersecting the puncture direction.

7. The lancet device according to claim 6 wherein

the first sloped surface is formed facing forward in the puncture direction and

the second sloped surface is formed facing backward in the puncture direction so as to be adjacent to the first sloped surface.

8. The lancet device according to claim 6 wherein

the pressing pressure part comes into contact with the first sloped surface and the second sloped surface when the lancet holder moves into the vicinity of the position of a state where the lancet holder can be projected by the first biasing part.

12. The lancet device according to claim 6 wherein

the pressing pressure part is a rib member that is formed in a case part inside which the lancet holder is inserted and extends in a direction intersecting the puncture direction.

13. The lancet device according to claim 6 wherein

the pressing pressure part is included in a puncture depth adjusting member that adjusts the puncture depth of a puncture needle attached to a tip of the lancet holder.

14. The lancet device according to claim 6 wherein

the lancet holder has a contact part that contacts with an end portion of the second biasing part when the lancet holder is moved forward in the puncture direction.