BLOOD LANCET DEVICE

• US 20130066352A1
• Filed: 09/07/2012
• Published: 03/14/2013
• Est. Priority Date: 09/09/2011
• Status: Active Grant

• Current Assignee: Tianjin Huahong Technology Company Limited
• Original Assignee: Tianjin Huahong Technology Company Limited
• Inventors: ZHANG, Libo, CUI, Chengzhe, LI, Bing
• Granted Patent: US 9,826,927 B2
• Time in Patent Office: Days
• US Class Current: 606/182
• 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 5/150503 Single-ended needles hollow piercing element tip design A61B5/150396, needle sets for catheters A61M25/06, needles for bringing media into the body A61M5/32
• CPC Class Codes: A61B 5/150564 Protectors removed by pulling or pushing
• CPC Class Codes: A61B 5/150595 by snap-lock (i.e. based on axial displacement)
• 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 5/150916 by blocking components, e.g. piston, driving device or fluid passageway
• CPC Class Codes: A61B 5/15109 Fully automatically triggered, i.e. the triggering does not require a deliberate action by the user, e.g. by contact with the patient's skin
• 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

A blood lancet device comprising a housing having one end formed as an opening; a sliding sleeve having one end extending from the opening to the outside of the housing; a blood lancet including a needle body and a needle tip arranged at one end of the needle body, the sliding sleeve being bushed at the outside of the housing, said blood lancet adapted to move relative to the sliding sleeve so as to expose the needle tip at the opening; and a biasing member having one end securely fixed with another end of needle body.

Claims

1. A blood lancet device, comprising:

a housing having one end formed as an opening;

a sliding sleeve adapted to slide along an axial direction of said housing inside the housing, and one end of the sliding sleeve being extended from said opening to an outside of the housing;

a blood lancet including a needle body and a needle tip disposed at one end of said needle body, said blood lancet adapted to move relative to said sliding sleeve so as to expose the needle tip at said opening;

a biasing member having one end engaged with another end of the needle body,

wherein,

said sliding sleeve is provided with at least one slot extending toward said one end of the sliding sleeve from the other end of the sliding sleeve, said at least one slot provides the other end of said sliding sleeve with an elasticity for deforming radially and inwardly;

at a first position within the housing where the sliding sleeve is located, the other end of said sliding sleeve is pressed inside said housing so as to elastically deform radially and inwardly; and

at a second position within the housing where the sliding sleeve is located, the other end of the sliding sleeve is not pressed inside the housing or subjects a pressing force less than the pressing force subjected at said first position, and said needle body moves toward said opening along said sliding sleeve under the action of the biasing member.

2. The blood lancet device according to claim 1, wherein:

said at least one slot includes two guiding slots extending toward said one end of the sliding sleeve from the other end of said sliding sleeve, said two guiding slots dividing said other end of the sliding sleeve into two guiding ends which can elastically deform toward each other;

said needle body also includes two lugs arranged in opposite, said two lugs are adapted to move along said two guiding slots under the action of the biasing member;

guiding portions engaged with said two guiding ends are provided inside the housing, engagements between said guiding portions and said guiding ends are adapted to press two guiding ends so as to reduce the width of the guiding slots at said other end of the sliding sleeve to prevent said two lugs from moving toward said one end of said sliding sleeve along said two guiding slots under the action of the biasing member.

3. The blood lancet device according to claim 2, wherein:

a tip end of each guiding end has a protrusion protruding radially and outwardly, and said protrusion is adapted to engage with said guiding portion(s).

4. The blood lancet device according to claim 3, wherein:

a recess is provided on said protrusion, and said guiding portion is a guide rail extending along the axial direction of the housing, said recess is fitted with said guide rail.

5. The blood lancet device according claim 4, wherein:

an initial section of said guide rail fitted with said recess is formed into an inclined engaging surface.

6. The blood lancet device according to claim 3, wherein:

said guiding portion comprises a sliding slot extending along the axial direction of the housing, said protrusion is adapted to move along said sliding slot.

7. The blood lancet device according to claim 3, wherein:

an groove extending toward said one end of the sliding sleeve from the tip end of the guiding end is provided on each guiding end, and said groove divides the corresponding protrusion into a first protruding portion and a second protruding portion which are separated.

8. The blood lancet device according to claim 7, wherein:

a first recess is provided on said first protruding portion and a second recess is provided on said second protruding portion, and said guiding portion includes a first guide rail and a second guide rail which are respectively fitted with said first recess and said second recess and extend along the axial direction of the housing.

9. The blood lancet device according to claim 8, wherein:

initial sections of said first guide rail and said second guide rail respectively fitted with said first recess and said second recess are formed as inclined engaging surfaces.

10. The blood lancet device according to claim 7, wherein:

said guiding portions comprise a first guiding slot portion and a second guiding slot portion extending along the axial direction of the housing, and said first protruding portion and said second protruding portions are adapted to move along said first guiding slot portion and said second guiding slot portion, respectively.

11. The blood lancet device according to claim 2, wherein:

an outer surface of each guiding end is provided with a longitudinal rib protruded radially and outwardly, said guiding portion comprises a rib guiding slot extending along the axial direction of the housing, and said longitudinal rib is adapted to engage with said rib guiding slot.

12. The blood lancet device according to claim 11, wherein:

a thickness of the longitudinal rib in a radial direction is gradually reduced in a direction from said other end of the sliding sleeve to said one end of the sliding sleeve.

13. The blood lancet device according to claim 11, wherein:

said longitudinal rib defines a distance by which said one end of the sliding sleeve moves to the outside of the opening.

14. The blood lancet device according to claim 2, wherein:

an end of each lug which enters in the guiding slot has a tapered shape which is tapered toward said one end of the needle body.

15. The blood lancet device according to claim 14, wherein:

the end of each lug which enters in the guiding slot forms said tapered shape in a manner of having an inclined surface or a semi-cylindrical surface.

16. The blood lancet device according to claim 1, wherein:

an end cover is provided at the other end of said housing, the other end of said biasing member is fixed on said end cover.

17. The blood lancet device according to claim 1, wherein:

said blood lancet device further comprises an end cap;

said blood lancet further comprises a needle tip covering element having an end extending to the outside of the housing,

wherein, an internal structure of said end cap is engaged with an end of said needle tip covering element so as to cover said opening with said end cap.

18. The blood lancet device according to claim 2, wherein:

a lug guiding element extending along the axial direction of the housing is also provided inside the housing.

19. The blood lancet device according to claim 2, wherein:

at least one stopper is further provided at an outer surface of the sliding sleeve, said stopper defines a distance by which said one end of the sliding sleeve move to the outside of the opening.

20. The blood lancet device according to claim 1, wherein:

said other end of the sliding sleeve has a protrusion protruded radially and outwardly;

when the sliding sleeve is in the first position, an inner wall of the housing is engaged with said protrusion so as to press said other end of the sliding is sleeve;

when the sliding sleeve is in the second position, said inner wall of the housing is not engaged with said protrusion.

21. The blood lancet device according to claim 1, wherein:

an interference fitting is formed between the opening of said housing and the outer surface of said one end of the sliding sleeve to prevent said one end of the sliding sleeve from sliding into the inside of the housing.

22. The blood lancet device according to claim 1, wherein:

a pawl is provided in the vicinity of said opening inside said housing, and a pawl fitting slot is provided at the tip end of said one end of the sliding sleeve, the fitting between the pawl and the pawl fitting slot prevents said one end of the sliding sleeve from sliding into the inside of the housing.