Puncture device and puncture needle cartridge

• US 8,740,923 B2
• Filed: 04/08/2010
• Issued: 06/03/2014
• Est. Priority Date: 04/28/2005
• Status: Active Grant

• Current Assignee: PHC Holdings Corporation
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Ono, Nobue, Tsubouchi, Toshiharu
• Primary Examiner(s): FISHBACK, ASHLEY LAUREN
• Application Number:
  US12/662,279
• Publication Number:
  US 20100198246A1
• Time in Patent Office: 1,517 Days
• Field of Search: 600/564, 600/567, 606181-182, 606184-186, 606188-189
• US Class Current: 606/182
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150167 Adjustable piercing speed of skin piercing element, e.g. blade, needle, lancet or canula, for example with varying spring force or pneumatic drive
• CPC Class Codes: A61B 5/15019 Depth adjustment mechanism using movable stops located inside the piercing device housing and limiting the travel of the drive mechanism mechanisms using distal end caps A61B5/150183, mechanisms at the piercing element carrier proximal end A61B5/150198
• 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 5/150564 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 5/15113 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 5/1513 comprising linear sliding guides comprising tooth-shaped elements A61B5/15132
• 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 5/15194 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 puncture device is constituted such that a plunger (2) is provided with a lever (3) which is partially restricted in rotation, and a forward urging force is obtained by a contraction restorative force of a tension spring (4), and the tension spring (4) is again expanded with the lever (3) as a leverage when the plunger (2) further moves forward due to its inertia from a position where no urging force is not applied, and the plunger (2) is urged backward by a restorative force of the re-expansion. Further, a puncture needle cartridge is provided with a lancet body (203) having a puncture needle, and a puncture needle holder (201) in which the lancet body (203) is movably stored, and further, the lancet body (203) has an arm means (302) and the puncture needle holder (201) contains a to-be-latched means (303) that cooperates with the arm means (302). Thereby, the fabrication process is simplified, and plural times of punctures of the puncture needle is prevented, and further, the puncture speed is controlled, and moreover, the used puncture needle is discarded safely.

Claims

1. A puncture needle cartridge for installation in a puncture device, the puncture needle cartridge comprising:

a lancet comprising an elongate lancet body having a puncture needle extending axially from one end of the body, and a portion to be held by a puncture device at the other end of the body, and a puncture needle protection cap for protecting the puncture needle; and

a cylindrical puncture needle holder for holding the lancet body so that the lancet is movable axially in the holder, and the outer diameter of the puncture needle holder at its needle exit end is larger than the outer diameter of the puncture needle holder at its opposite end, with four linear grooves in the inner periphery of and parallel to the axial length of the puncture needle holder and evenly angularly spaced about a longitudinal axis of the holder;

the lancet body comprises a first pair of convex portions diametrically opposite each other across a longitudinal axis of the lancet body,

each of the first pair of convex portions, being slidably engaged with one of the grooves to thereby guide sliding movement of the lancet body,

the lancet body further comprising a second pair of convex portions located diametrically opposite each other across the longitudinal axis of the lancet body and spaced axially separately from said first pair of convex portions, and located outside the puncture needle holder.

2. The puncture needle cartridge as defined in claim 1, wherein the periphery of the puncture needle holder is substantially cylindrical.

3. A puncture needle cartridge for installation in a puncture device, the puncture needle cartridge comprising:

a lancet comprising an elongate lancet body having a puncture needle extending axially from one end of the body and a portion to be held by a puncture device at the other end of the body, and a puncture needle protection cap for protecting the puncture needle; and

a cylindrical puncture needle holder for holding the lancet body so that the lancet body is movable axially in the holder, and the outer diameter of the puncture needle holder at its needle exit end is larger than the outer diameter of the puncture needle holder at its opposite end, with a plurality of linear grooves in the inner periphery of and parallel to the axial length of the puncture needle holder and evenly angularly spaced about a longitudinal axis of the holder;

the lancet body comprises a first pair of convex portions which are diametrically across a longitudinal axis of the lancet body,

each one of the first pair of convex portions, being slidably engaged with one of said grooves to thereby guide sliding movement of the lancet body,

the lancet body further comprising a second pair of convex portions located diametrically opposite each other across the longitudinal axis of the lancet body and spaced axially separately from said first pair of convex portions, and located outside the puncture needle holder.