Puncturing instrument

• US 9,237,904 B2
• Filed: 12/05/2011
• Issued: 01/19/2016
• Est. Priority Date: 12/06/2010
• Status: Active Grant

• Current Assignee: PHC Holdings Corporation
• Original Assignee: Panasonic Healthcare Holdings Co., Ltd.
• Inventors: Shima, Takumi, Nagao, Akio
• Primary Examiner(s): Miles, Jonathan W
• Assistant Examiner(s): Ulsh, George J
• Application Number:
  US13/991,014
• Publication Number:
  US 20130253560A1
• Time in Patent Office: 1,506 Days
• Field of Search: 606/181, 606/185
• US Class Current: 1/1
• CPC Class Codes: A61B 17/34 Trocars; Puncturing needles pointed biopsy instruments A61B10/0233; devices for piercing the ear-lobes A44C7/001; seals or hemostasis valves A61M39/06
• 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 5/150183 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 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 5/150717 manually removed
• CPC Class Codes: A61B 5/15107 Piercing being assisted by a triggering mechanism
• 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 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.

Claims

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.