INJECTOR

• US 20150133818A1
• Filed: 05/10/2013
• Published: 05/14/2015
• Est. Priority Date: 05/18/2012
• Status: Abandoned Application

• Current Assignee: Asahi Polyslider Company, Limited (Izumi-Cosmo Co., Ltd.)
• Original Assignee: Asahi Polyslider Company, Limited (Izumi-Cosmo Co., Ltd.)
• Inventors: Saeki, Hideaki, Imori, Hirokazu
• Application Number:
  US14/401,662
• Publication Number:
  US 20150133818A1
• Time in Patent Office: Days
• US Class Current: 600/583
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150106 Means for reducing pain or discomfort applied before puncturing; desensitising the skin at the location where body is to be pierced
• CPC Class Codes: A61B 5/15019 Depth adjustment mechanism using movable stops located inside the piercing device housing and limiting the travel of the drive mechanism mechanisms using distal end caps A61B5/150183, mechanisms at the piercing element carrier proximal end A61B5/150198
• CPC Class Codes: A61B 5/150435 Specific design of proximal end
• 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 5/150732 Needle holders, for instance for holding the needle by the hub, used for example with double-ended needle and pre-evacuated tube,
• CPC Class Codes: A61B 5/151 Devices specially adapted for taking samples of capillary blood, e.g. by lancets , needles or blades
• 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 5/1519 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
• CPC Class Codes: F04C 2270/0421 Controlled or regulated

Abstract

There is provided an injector capable of launching a lancet to provide a pricking. The injector comprises a plunger part capable of launching the lancet in a pricking direction, and an injector casing, the plunger part being located in an interior space of the casing. The plunger part comprises a lancet-attachment portion in its tip, and the lancet-attachment portion has a dual cylindrical structure composed of an outer cylinder and an inner cylinder such that respective bodies of the outer and inner cylinders are spaced away from each other.

Claims

1. An injector for launching the lancet to provide a pricking, the injector comprising:

a plunger part capable of launching the lancet in a pricking direction; and

an injector casing, the plunger part being located in an interior space of the casing,

wherein the plunger part comprises a lancet-attachment portion in its tip, and the lancet-attachment portion has a dual cylindrical structure composed of an outer cylinder and an inner cylinder such that respective bodies of the outer and inner cylinders are spaced away from each other.

2. The injector according to claim 1, wherein the lancet-attachment portion of the plunger part is located inside of a front end opening portion of the injector casing, and

wherein an external body surface of the outer cylinder of the lancet-attachment portion and an internal wall surface of the front end opening portion of the injector casing are in close contact with or adjacent to each other.

3. The injector according to claim 1, wherein, when the lancet is attached to the lancet-attachment portion, the inner cylinder of the lancet-attachment portion is displaced to expand outward, whereas the outer cylinder of the lancet-attachment portion is not displaced.

4. The injector according to any one of claims claim 1, further comprising:

a spring part “

A”

for launching the plunger part in the pricking direction; and

a spring part “

B”

for returning the launched plunger part,

wherein the spring parts “

A” and

“

B”

are positioned in parallel with each other in a direction perpendicular to the pricking direction.

5. The injector according to claim 4, wherein a rear end side portion of the plunger part is provided with two hollow portions “

A” and

“

B”

, the hollow portions “

A” and

“

B”

being adjacent in parallel to each other,

wherein the spring part “

A”

is positioned in the hollow portion “

A”

of the plunger part, whereas the spring part “

B”

is positioned in the hollow portion “

B”

of the plunger part.

6. The injector according to claim 1, further comprising a pricking-depth adjusting mechanism, the mechanism comprising:

a disk part provided with an anisotropically-shaped portion having side faces and a rotation axis, spaced distances “

L”

between the respective side faces and the rotation axis being different from each other in the anisotropically-shaped portion; and

an axis part extending through the rotation axis of the anisotropically-shaped portion,

wherein the disk part is positioned such that at least one of the side faces of the anisotropically-shaped portion takes a form of a perpendicular face with respect to the pricking direction,

wherein the axis part extends in a traverse direction of the injector,

wherein, when the plunger part moves forward for the pricking, a part of the plunger part hits the side face of the anisotropically-shaped portion so that a further forward movement of the plunger part is prevented, and

wherein the side face which the part of the plunger part hits can be switched to the other side faces with the different spaced distances “

L”

by such a rotation of the disk part that the anisotropically-shaped portion is rotated about the rotation axis thereof, and thereby the distance over which the plunger part can move forward for the pricking is changed.

7. The injector according to claim 6, wherein the axis part is flexible.

8. The injector according to claim 7, wherein the axis part exhibits flexibility in the pricking direction and a reverse direction thereof.

9. The injector according to claim 6, wherein the axis part and the disk part are provided as an integral part, the axis part and the disk part being integrated with each other.