Puncturing instrument

Patent metadata

Field	Value
Publication number	US-9237904-B2
Application number	US-201113991014-A
Country	US
Kind code	B2
Filing date	Dec 5, 2011
Priority date	Dec 6, 2010
Publication date	Jan 19, 2016
Grant date	Jan 19, 2016

Abstract

A puncturing instrument includes a cylindrical main body case having a puncture aperture on a lower end side; a needle holder provided on a puncture aperture side inside the cylindrical main body case; a first elastic object for moving the needle holder to the puncture aperture side; and a second elastic object for pulling the needle holder back to an upper end side inside the cylindrical main body case, from a state in which the needle holder is moved to the puncture aperture side by the first elastic object. A rotator rotates around a rotation shaft fixed to the cylindrical main body case, and is coupled with a coupling portion of the needle holder on a first one of two sides of the rotator with the rotation shaft interposed therebetween and is coupled with the second elastic object on a second one of the two sides of the rotator.

First claim

The invention claimed is:

1. A puncture instrument comprising: a cylindrical main body case having a puncture aperture on a lower end side of the cylindrical main body case; a needle holder provided on a puncture aperture side inside the cylindrical main body case, the needle holder having a coupling portion; a first elastic object for moving the needle holder to the puncture aperture side; and a second elastic object for pulling the needle holder back to an upper end side of the cylindrical main body case, from a state in which the needle holder is moved to the puncture aperture side by the first elastic object, wherein a rotator is configured to rotate around a rotation shaft fixed to the cylindrical main body case and is provided above a needle holding portion of the needle holder inside the cylindrical main body case, and wherein the rotator is coupled with the coupling portion on a first one of two sides of the rotator with the rotation shaft interposed therebetween and is coupled with the second elastic object on a second one of the two sides of the rotator, and wherein a protrusion is formed on the coupling portion and a hole is formed in the rotator, and the protrusion is configured to fit into the hole so as to couple the rotator with the coupling portion.

2. The puncture instrument according to claim 1 , wherein:
the needle holding portion is on a lower end side of the needle holder and the coupling portion is rod-shaped and is on an upper end side of the needle holder,
the first elastic object is coil-shaped, and the first elastic object is placed around a periphery of the rod shaped coupling portion, and
the first elastic object is attached to the needle holder on the lower end side of the needle holder and is attached to the cylindrical main body case on the upper end side of the cylindrical main body case.

3. The puncture instrument according to claim 1 , wherein a base member is fixed inside the cylindrical main body case, and the needle holder is longitudinally slidably mounted in relation to the base member.

4. The puncture instrument according to claim 2 , wherein a base member is fixed inside the cylindrical main body case, and the needle holder is longitudinally slidably mounted in relation to the base member.

5. The puncture instrument according to claim 3 , wherein the first elastic object is attached to the base member on an upper end side of the base member.

6. The puncture instrument according to claim 4 , wherein the first elastic object is attached to base member on an upper end side of the base member.

7. The puncture instrument according to claim 3 , wherein the rotation shaft for the rotator is provided on the base member.

8. The puncture instrument according to claim 4 , wherein the rotation shaft for the rotator is provided on the base member.

9. The puncture instrument according to claim 5 , wherein the rotation shaft for the rotator is provided on the base member.

10. The puncture instrument according to claim 6 , wherein the rotation shaft for the rotator is provided on the base member.

11. The puncture instrument according to claim 1 , wherein the rotator is board-shaped and extends in a direction perpendicular to a longitudinal direction of the cylindrical main body case in a state in which a puncture needle is not attached, and the first elastic object and the second elastic object are disposed below the rotator on the lower end side of the cylindrical main body case.

12. The puncture instrument according to claim 1 , wherein the rotator is directly coupled with the coupling portion.

13. The puncture instrument according to claim 1 , wherein the first elastic object and the second elastic object are in between the needle holder and the rotator.

14. The puncture instrument according to claim 1 , wherein at least a portion of the needle holder is closer to the puncture aperture than the first elastic object.

15. The puncture instrument according to claim 1 , wherein a longitudinal axis of the first elastic object and a longitudinal axis of the second elastic object are disposed along a longitudinal direction of the puncture instrument.

Assignees

• Shima Takumi
• Nagao Akio
• Panasonic Healthcare Holdings Co Ltd

Inventors

• Shima Takumi
• Nagao Akio

Classifications

• A61B5/15117

  comprising biased elements, resilient elements or a spring, e.g. a helical spring, leaf spring, or elastic strap · CPC title

• A61B5/150022 Primary

  for capillary blood or interstitial fluid · CPC title

• A61B5/1519

  comprising driving means, e.g. a spring, for propelling the piercing unit · CPC title

• A61B5/150549

  Protectors removed by rotational movement, e.g. torsion or screwing · CPC title

• A61B5/150183

  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 title