Lancet pricking device

• US 9,693,712 B2
• Filed: 09/26/2014
• Issued: 07/04/2017
• Est. Priority Date: 10/07/2009
• Status: Active Grant

• Current Assignee: Asahi Polyslider Company, Limited (Izumi-Cosmo Co., Ltd.), Izumi-Cosmo Co., Ltd.
• Original Assignee: Asahi Polyslider Company, Limited (Izumi-Cosmo Co., Ltd.), Izumi-Cosmo Co., Ltd.
• Inventors: Hyoue, Tomoyuki, Saeki, Hideaki, Imori, Hirokazu
• Primary Examiner(s): Templeton, Christopher L
• Application Number:
  US14/497,831
• Publication Number:
  US 20150012029A1
• Time in Patent Office: 1,012 Days
• CPC Class Codes: A61B 5/1405 Devices for taking blood samples devices for taking samples of other body liquids A61B10/0045
• 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 5/15019 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 5/150259 Improved gripping, e.g. with high friction pattern or projections on the housing surface or an ergonometric shape
• CPC Class Codes: A61B 5/150435 Specific design of proximal end
• 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 5/150618 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 5/150916 by blocking components, e.g. piston, driving device or fluid passageway
• CPC Class Codes: A61B 5/151 Devices specially adapted for taking samples of capillary blood, e.g. by lancets , needles or blades
• CPC Class Codes: A61B 5/15107 Piercing being assisted by a triggering mechanism
• CPC Class Codes: A61B 5/15111 Semi-automatically triggered, e.g. at the end of the cocking procedure, for instance by biasing the main drive spring or when reaching sufficient contact pressure, the piercing device is automatically triggered without any deliberate action by the user
• 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 5/15115 Driving means for propelling the piercing element to pierce the skin, e.g. comprising mechanisms based on shape memory alloys, magnetism, solenoids, piezoelectric effect, biased elements, resilient elements, vacuum or compressed fluids
• 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 5/15142 Devices intended for single use, i.e. disposable
• CPC Class Codes: A61B 5/15144 comprising driving means, e.g. a spring, for retracting the piercing unit into the housing
• CPC Class Codes: F16F 1/122 where coils, e.g. end coils, of the spring are rigidly clamped or similarly fixed
• CPC Class Codes: F16F 1/123 characterised by the ends of the spring being specially adapted, e.g. to form an eye for engagement with a radial insert F16F1/122, F16F1/125 take precedence

Abstract

A lancet pricking device comprises a lancet, a launching spring, a trigger part and a holder housing the lancet, launching spring and trigger part. The lancet comprises a lancet body, lancet cap and pricking needle. The pricking needle is in both the lancet body and lancet cap. The trigger part has a pair of arms positioned inside the holder. The launching spring is attached to the lancet body. The lancet body is secured to the arms of the trigger part by an abutment of the lancet body on the arms such that the launching spring is compressed before a pricking operation. The trigger part cannot be pushed toward the inside of the holder before the lancet cap is removed, but can be pushed toward the inside of the holder after the cap is removed. The lancet body warps when pressed to release the secured lancet body.

Claims

1. A lancet pricking device, comprising:

a lancet;

a launching spring;

a trigger part having a rear side inner wall;

a holder for housing therein the lancet, the launching spring and the trigger part; and

a spring-attachment portion provided at the rear side inner wall of the trigger part, the spring-attachment portion comprising a bent elongated part, the bent elongated part having a fixed end that is fixed to the rear side inner wall of the trigger part, the bent elongated part having a bent form of a U-shape that includes a first portion that extends outwardly from the fixed end that is fixed to the rear side inner wall, a second portion that continues outwardly from the first portion and then bends back inwardly toward the rear side inner wall, and a third portion that continues inwardly from the second portion toward the rear side inner wall, and the bent elongated part having a free end at an end of the third portion distal from the second portion, the spring-attachment portion further having a first protrusion that is provided at the free end of the third portion of the bent elongated part and a second protrusion provided on the first portion of the bent elongated part at the fixed end of the bent elongated part.

2. The lancet pricking device of claim 1, wherein the first protrusion and the second protrusion engage coils on opposite sides of the launching spring so as to hold the launching spring to the rear side inner wall of the trigger part.

3. The lancet pricking device of claim 1, wherein the bent elongated part is able to warp inwardly to allow attachment of the launching spring thereto.

4. A lancet pricking device, comprising:

a lancet;

a launching spring;

a trigger part having a rear side inner wall;

a holder for housing therein the lancet, the launching spring and the trigger part; and

a spring-attachment portion provided at the rear side inner wall of the trigger part to which the launching spring is attached, the spring-attachment portion comprising an elongated part bent into a U-shape and having a fixed end fixed to the rear side inner wall of the trigger part, the elongated part extending outward from the fixed end to form a first leg of the U-shape, continues from the first leg of the U-shape to form a bottom of the U-shape, and continues inwardly from the bottom of the U-shape toward the rear side inner wall, to a free end directed toward the rear side inner wall, so as to form a second leg of the U-shape and so as to form the U-shape to be capable of warping upon attachment of the launching spring;

wherein the spring-attachment portion has a first protrusion on an outer side of the second leg of the U-shape that is provided at the free end of the second leg and a second protrusion provided on the outer side of the first leg of the U-shape at the fixed end of the bent elongated part.

5. The lancet pricking device of claim 4, wherein the first protrusion and the second protrusion engage coils on opposite sides of the launching spring so as to hold the launching spring to the rear side inner wall of the trigger part.