Disposable safety lancet

• US 20050283177A1
• Filed: 06/18/2004
• Published: 12/22/2005
• Est. Priority Date: 06/18/2004
• Status: Abandoned Application

• Current Assignee: Eumed Biotechnology Co., Ltd.
• Original Assignee: Eumed Biotechnology Co., Ltd.
• Inventors: Chen, Tzer-Ming
• Application Number:
  US10/871,228
• Publication Number:
  US 20050283177A1
• Time in Patent Office: Days
• US Class Current: 606/181
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• 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 5/150412 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 5/150885 Preventing re-use
• 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 5/15117 comprising biased elements, resilient elements or a spring, e.g. a helical spring, leaf spring, or elastic strap
• CPC Class Codes: A61B 5/15144 comprising driving means, e.g. a spring, for retracting the piercing unit into the housing

Abstract

A safety lancet includes a housing, a needle hub with a needle received inside the housing and be movable relative to the housing, a latching device for retaining position of the needle hub relative to the housing, an agitation device movable relative to the housing to release position retaining of the latching device to the needle hub, and a driving device integrally formed with the agitation device to initially and eccentrically drive the needle hub relative to the housing so as to facilitate the position release of the latching device to the needle hub.

Claims

1. A lancet comprising:

a housing;

a needle hub with a needle received inside the housing and being movable relative to the housing;

a latching device for retaining position of the needle hub relative to the housing;

an agitation device movable relative to the housing to release position retaining of the latching device to the needle hub; and

a driving device integrally formed with the agitation device to initially and eccentrically drive the needle hub relative to the housing so as to facilitate the position release of the latching device to the needle hub.

2. The lancet as claimed in claim 1, wherein the driving device includes a pushbutton and a C shaped element eccentrically connected to the pushbutton such that a linear movement of the pushbutton is able to provide an eccentric force to the needle hub when the latching device retains the needle hub position relative to the housing.

3. The lancet as claimed in claim 2, wherein the agitation device is a plate integrally formed with the pushbutton to facilitate the position release of the latching device to the needle hub when the pushbutton is moved.

4. The lancet as claimed in claim 1, wherein the latching device includes a ratchet formed on a side of the needle hub and a positioning block formed on an inner side of the housing such that when the ratchet engages with the positioning block, the needle hub position is retained relative to the housing and when the ratchet disengages with the positioning block, the needle hub is movable relative to the housing.

5. The lancet as claimed in claim 2, wherein the latching device includes a ratchet formed on a side of the needle hub and a positioning block formed on an inner side of the housing such that when the ratchet engages with the positioning block, the needle hub position is retained relative to the housing and when the ratchet disengages with the positioning block, the needle hub is movable relative to the housing.

6. The lancet as claimed in claim 3, wherein the latching device includes a ratchet formed on a side of the needle hub and a positioning block formed on an inner side of the housing such that when the ratchet engages with the positioning block, the needle hub position is retained relative to the housing and when the ratchet disengages with the positioning block, the needle hub is movable relative to the housing.

7. The lancet as claimed in claim 3, wherein the plate has two guiding poles respectively formed on two opposite sides of the plate to be received in a corresponding one of two guiding tracks defined in opposite inner side faces of the housing so as to guide the pushbutton to move linearly.

8. The lancet as claimed in claim 4, wherein the plate has two guiding poles respectively formed on two opposite sides of the plate to be received in a corresponding one of two guiding tracks defined in opposite inner side faces of the housing so as to guide the pushbutton to move linearly.

9. The lancet as claimed in claim 5, wherein the plate has two guiding poles respectively formed on two opposite sides of the plate to be received in a corresponding one of two guiding tracks defined in opposite inner side faces of the housing so as to guide the pushbutton to move linearly.

10. The lancet as claimed in claim 6, wherein the plate has two guiding poles respectively formed on two opposite sides of the plate to be received in a corresponding one of two guiding tracks defined in opposite inner side faces of the housing so as to guide the pushbutton to move linearly.

11. The lancet as claimed in claim 10, wherein the cover has two abutting arms respectively formed on a side face of the cover to abut a flange which is formed on a peripheral edge of the housing to stop movement of the driving device.

12. The lancet as claimed in claim 11, wherein the casing further has a boss integrally formed with an inner face of the casing to correspond to and prevent the C shaped element from escaping the casing.