PRICKING DEVICE

• US 20100168774A1
• Filed: 12/23/2009
• Published: 07/01/2010
• Est. Priority Date: 12/25/2008
• Status: Abandoned Application

• Current Assignee: Nissei Plastic Industrial Co., Ltd.
• Original Assignee: Nissei Plastic Industrial Co., Ltd.
• Inventors: Morita, Susumu, Yamazaki, Minoru, Yoda, Hozumi
• Application Number:
  US12/645,656
• Publication Number:
  US 20100168774A1
• 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 5/150297 for piercing devices, i.e. devices ready to be used for lancing or piercing for piercing elements A61B5/150282, for driving devices A61B5/15029
• 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 5/15111 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 5/15128 comprising 2D- or 3D-shaped elements, e.g. cams, curved guide rails or threads comprising tooth-shaped elements A61B5/15132
• CPC Class Codes: A61B 5/15142 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

Abstract

A pricking device having an accurate pricking function, an automatic safe post-use discarding function and a re-use inhibiting function is disclosed. The pricking device is easy and simple to operate, simple in structure and is high in productivity to reduce production costs. The pricking device is made up of a lancet unit and a housing unit. The lancet unit includes a needle. The lancet unit is formed by a unit body member, a restoration member and a resilient piece for lock molded as one with one another. The unit body member operates to cause the needle to pop out from the housing unit in connection with a pricking operation. The restoration member controls the operation of movement of the unit body member as it stores a force of elasticity in it. After the pricking operation, the needle is returned into the inside of the housing unit under the so stored force of elasticity of the restoration member. Another force of elasticity is stored in the resilient piece for lock as a result of the movement of the unit body member. The resilient piece for lock includes a cam bump engaged with a lock cam section of the housing unit after the pricking operation.

Claims

1. A pricking device comprising:

a lancet unit integrally formed with a needle; and

a housing that houses said lancet unit for movement therein;

wherein said lancet unit includes

a unit body member movable within said housing in connection with a pricking operation to cause said needle to pop out of said housing; and

a resilient piece;

wherein said resilient piece includes a cam bump that may be engaged with a cam groove formed in said housing;

said resilient piece being integrally formed with said unit body member, said resilient piece storing a force of elasticity as said unit body member is moved in connection with said pricking operation, said cam bump engaging within a foremost part of said cam groove when said unit body member has returned into said housing after the pricking operation, said cam bump being kept engaged within said foremost part under said force of elasticity stored in said resilient piece to keep a state of inhibiting re-popping out of said needle;

said unit body member or said housing including a restoration member that stores therein another force of elasticity as said unit body member is moved in connection with said pricking operation, said restoration member causing said needle to be returned into the inside of said housing under said another force of elasticity after the pricking operation.

2. The pricking device according to claim 1, wherein

said restoration member is integrally formed with said unit body member, and wherein

said resilient piece and said restoration member being each a cantilevered substantially rectangular resilient plate integrally formed with and protruded from at least a side edge of said unit body member.

3. The pricking device according to claim 1 or 2, wherein

said housing is formed of a main housing member and a cover member, wherein

said main housing member being opened on one major side thereof and delimiting a lancet accommodating void portion for housing said lancet unit therein, and said cover member being combined with said main housing member in a manner of closing an opened part of said lancet accommodating void portion.

4. The pricking device according to any one of claims 1 to 3, wherein

said housing is integrally formed with a pair of housing halves and a thin-walled hinge interconnecting said housing halves by a synthetic resin material, and said housing halves delimiting a lancet accommodating void portion in which said lancet unit is housed.