RELEASING STRUCTURE FOR LANCING DEVICE

• US 20130274781A1
• Filed: 09/20/2011
• Published: 10/17/2013
• Est. Priority Date: 12/14/2010
• Status: Active Grant

• Current Assignee: i-SENS, Inc.
• Original Assignee: i-SENS, Inc.
• Inventors: Cha, Geun Sig, Nam, Hakhyun, Cha, Eun-Jong, Kim, Kyung-Ah
• Granted Patent: US 9,192,331 B2
• Time in Patent Office: Days
• US Class Current: 606/182
• 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 5/150068 by tissue compression, e.g. with specially designed surface of device contacting the skin area to be pierced
• CPC Class Codes: A61B 5/150114 by tissue compression, e.g. with specially designed surface of device contacting the skin area to be pierced
• 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 5/150664 Pivotable protective sleeves, i.e. sleeves connected to, or integrated in, the piercing or driving device, and which are pivoted for covering or uncovering the piercing element
• 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 5/15126 Means for controlling the lancing movement, e.g. 2D- or 3D-shaped elements, tooth-shaped elements or sliding guides
• CPC Class Codes: A61B 5/15128 comprising 2D- or 3D-shaped elements, e.g. cams, curved guide rails or threads comprising tooth-shaped elements A61B5/15132
• CPC Class Codes: A61B 5/1513 comprising linear sliding guides comprising tooth-shaped elements A61B5/15132
• 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 releasing structure for a lancing device according to an exemplary embodiment of the present invention may include: a lancet body with a lancet at the front; a lancet holder mounted with the lancet body with the lancet at the front; a stem disposed behind the lancet holder and moving the lancet holder forward/backward; a rotary housing pushing/pulling the stem while turning forward at a predetermined angle about a rotational axis defined in the movement direction of the lancet; a torsion spring storing torque for turning the rotary housing forward at a predetermined angle; and a loading handle transmitting torque to the torsion spring while turning forward at a predetermined angle.

Claims

1. A releasing structure for a lancing device, comprising:

a lancet body with a lancet at the front;

a lancet holder mounted with the lancet body with the lancet at the front;

a stem disposed behind the lancet holder and moving the lancet holder forward/backward;

a rotary housing pushing/pulling the stem while turning forward at a predetermined angle about a rotational axis defined in the movement direction of the lancet;

a torsion spring storing torque for turning the rotary housing forward at a predetermined angle; and

a loading handle transmitting torque to the torsion spring while turning forward at a predetermined angle.

2. The structure of claim 1, wherein the lancet body, the lancet holder, the stem, the rotary housing, the torsion spring, and the loading handle are sequentially arranged on a rotation center axis defined in the movement direction of the lancet.

3. The structure of claim 1, further comprising

a case in which at least a portion of the lancet body, the lancet holder, the stem, the rotary housing, the torsion spring, or the loading handle is inserted,

wherein an anti-reverse protrusion that prevents the loading handle from reversing is formed on the outer side of the loading handle and a locking protrusion corresponding to the anti-reverse protrusion is formed on the inner side of the case, and

the anti-reverse protrusion is locked to the locking protrusion, after the loading handle transmits torque to the torsion spring by turning at a predetermined angle, such that the loading handle is prevented from reversing.

4. The structure of claim 3, wherein a locking protrusion is formed on the outer side of the rotary housing, at a predetermined distance from the rotation center axis, and the structure includes:

a locker mounted on a side of the case and having an anti-releasing protrusion for preventing turning of the rotary housing by engaging with the locking protrusion;

a releasing spring elastically supporting the locker to keep the anti-releasing protrusion engaging with the locking protrusion; and

a releasing switch mounted on the case and pushing the locker against the elastic force of the releasing spring so that the anti-releasing protrusion is unlocked from the locking protrusion and the rotary housing is turned by the torque stored in the torsion spring.

5. The structure of claim 1, wherein one end of the stem is connected to the lancet holder by a connection pin and the other end is inserted in the rotary housing,

a disc formed radially from the rotation center axis of the stem in the rotary housing is formed on the portion of the stem which is inserted in the rotary housing,

a forward-inclined rib inclined within a predetermined range of angle in the rotation direction is formed on the rear side of the disc and a backward-inclined rib corresponding to the forward-inclined ribs is formed on the front side of the disc,

a forward rib protrudes at a side on the inner side of the rotary housing with the stem inserted, corresponding to the forward-inclined rib, and pushes the stem forward by moving along the inclined surface of the forward-inclined rib while turning with the rotary housing, and

a backward rib protrudes at the other side on the inner side of the rotary housing, corresponding to the backward-inclined rib, and pushes the stem backward by moving along the inclined surface of the backward-inclined rib while turning with the rotary housing.

6. The structure of claim 5, wherein two forward-inclined ribs are formed with a gap of 180 degrees in the rotation direction on the rear side of the disc, and

two backward-inclined ribs are formed with a gap of 180 degrees in the rotation direction on the front side of the disc, corresponding to the forward-inclined ribs.

7. The structure of claim 5, wherein the forward rib comes in close contact with the inclined surfaces of the forward-inclined ribs while turning with the rotary housing so that the stem moves forward,

the backward rib comes in close contact with the inclined surfaces of the backward-inclined ribs while turning with the rotary housing so that the stem moves backward, and

the forward-inclined ribs and the backward-inclined ribs has a rotational difference of 90 degrees in the turning direction of the rotary housing.

8. The structure of claim 7, wherein the forward rib is in contact with the rear side of the disc, with the rotary housing turned 0 degrees, before releasing,

as the rotary housing turns 90 degrees, the forward rib pushes the stem forward by moving along the inclined surface of the forward-inclined rib and the backward rib is adjacent to the front side of the disc, and

as the rotary housing turns 180 degrees, the backward rib moves the stem backward by moving along the inclined surface of the backward-inclined rib.

9. The structure of claim 6, wherein the inclined surface of the forward-inclined rib is formed within the range of 90 degrees in the turning direction of the rotary housing.

10. The structure of claim 3, wherein an indication hole is formed at the case and the turning position of the loading handle or the rotary housing is sensed through the indication hole.