Automatic safe self-destructive disposable blood sampling device

• US 20060058828A1
• Filed: 08/20/2003
• Published: 03/16/2006
• Est. Priority Date: 05/12/2003
• Status: Active Grant

• Current Assignee: Guoping Shi
• Original Assignee: Guoping Shi
• Inventors: Shi, Guoping
• Granted Patent: US 7,175,643 B2
• 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 5/150412 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 5/150618 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 5/15113 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 5/15144 comprising driving means, e.g. a spring, for retracting the piercing unit into the housing

Abstract

An automatic safe disposable blood sampling device, comprising a case defining an shoot chamber, said shoot chamber being provided with a lancet-exiting hole at a front end thereof; a lancet disposed slidably in said shoot chamber and provided with a puncturing tip at a front portion thereof, said puncturing tip being pointed to said lancet-exiting hole in an alignment manner, a spring disposed at back of said lancet in a shooting direction of said lancet; a locking and shooting structure provided on a side of said lancet and said case along a compression path of said spring, said locking and shooting structure being composed of an elastic arm button on said case and an elastic arm on said lancet, said elastic arm button being an extended structure on a side of said case, a button engaging end of said elastic arm button facing a locking hole provided on a side wall of said case, said elastic arm being another extended structure on a side of said lancet corresponding to said side wall of said case, a free end of said elastic arm being engaged with said locking hole in a locking state, and a root portion of said elastic arm being provided with a notch or a shrink neck oil which stress is easy to concentrate. Since a notch or a shrink neck is provided at the root portion of the elastic arm, the elastic arm disengages from the locking hole after the elastic arm button is pressed, at the same time, the elastic arm is broken to be self-destructed due to the stress concentration on the notch, therefore, the present invention is beyond retrieval after one-off shooting.

Claims

1. An automatic safe disposable blood sampling device, comprising:

a case defining an shoot chamber, said shoot chamber being provided with a lancet-exiting hole at a front end thereof;

a lancet disposed slidably in said shoot chamber and provided with a puncturing lip at a front portion thereof, said puncturing tip being pointed to said lancet-exiting hole in an alignment manner;

a spring disposed at back of said lancet in a shooting direction of said lancet;

a locking and shooting structure provided on a side of said lancet and said case along a compression path of said spring, said locking and shooting structure being composed of an elastic arm button on said case and an elastic arm on said lancet, said elastic arm button being an extended structure on a side of said case, a button engaging end of said elastic arm button facing a locking hole provided on a side wall of said case, said elastic arm being another extended structure on a side of said lancet corresponding to said side wall of said case, a free end of said elastic arm being engagable with said locking hole in a locking state, and a root portion of said elastic arm being provided with a notch or a shrink neck on which stress is easy to concentrate, said notch or shrink neck forming a self-destructive breaking point of said elastic arm.

2. The blood sampling device according to the claim 1, wherein said notch is provided on an outer side of said elastic arm.

3. The blood sampling device according to the claim 1, wherein said notch on which stress in easy to concentrate has a V-shaped notch.

4. The blood sampling device according to the claim 1, wherein an avoiding space is provided in a direction on which said elastic arm is bent inwardly.

5. The blood sampling device according to the claim 1, wherein said free end of said elastic arm is provided with a catching groove to be engaged with an inner side surface of said locking hole.