Injection-needle cover

Patent metadata

Field	Value
Publication number	US-10357618-B2
Application number	US-201515535186-A
Country	US
Kind code	B2
Filing date	Dec 17, 2015
Priority date	Dec 19, 2014
Publication date	Jul 23, 2019
Grant date	Jul 23, 2019

Abstract

A injection-needle cover includes an injection needle enclosure portion, which has paired base-side wall portions, a cylinder portion, paired tip-end-side wall portions, an injection needle contact portion, a hook portion, and a needle tip end fixing portion. The injection needle contact portion is disposed at a position in a base-side axial space, which is a boundary between the base-side axial space and an intra-cylinder space. The injection needle contact portion has a force receiving portion and a connecting portion. The force receiving portion receives a force from the injection needle when the force receiving portion comes in contact with the injection needle. The force receiving portion has an easy sliding portion, which is disposed in an area adjacent to an injection needle, and slides more easily along the injection needle than a case where an edge slides along the injection needle.

First claim

The invention claimed is:

1. An injection-needle cover comprising:
a base portion that is fixed to an injection needle protruding face of a syringe, having a cylinder and an injection needle protruding from the cylinder, so as to enclose the injection needle, the injection needle protruding face being a face of the syringe from which the injection needle is protruding from the cylinder;
a base hinge, which is a hinge provided to the base portion;
a connected portion fitting space forming portion, which is connected to the base portion by the base hinge so as to turn about a base axis orthogonal to a central axis of the injection needle and which forms a space where a portion of the injection needle connected to the cylinder is to become fitted;
a connecting hinge, which is a hinge provided to the connected portion fitting space forming portion; and
an injection needle enclosure portion, which is connected to the connected portion fitting space forming portion by the connecting hinge so as to turn about a connection axis parallel to the base axis,
the injection needle enclosure portion including:
paired base-side wall portions forming a base-side axial space where a portion of the injection needle is to become fitted,
a cylinder portion, which is continuous from the paired base-side wall portions and which forms an intra-cylinder space communicating with the base-side axial space,
paired tip-end-side wall portions that are continuous from the cylinder portion, form a tip-end-side axial space where a tip end portion of the injection needle is to become fitted so that the tip-end-side axial space communicates with the intra-cylinder space, and that are disposed on the opposite side of the cylinder portion from the paired base-side wall portions so that the base-side axial space and the tip-end-side axial space are aligned with each other, and
an injection needle contact portion disposed at such a position in one of the base-side axial space and the intra-cylinder space as to come in contact with the injection needle when the base hinge opens,
wherein the injection needle contact portion has:
a force receiving portion that is disposed between the base-side wall portions and receives a force from the injection needle when the force receiving portion comes in contact with the injection needle, and
a connecting portion that connects the paired base-side wall portions or the cylinder portion to the force receiving portion;

wherein the force receiving portion has an easy sliding portion that is disposed in an area adjacent to an injection needle and slides along the injection needle more easily as compared to an edge, which has an equal coefficient of static friction to a surface of the connecting portion and crossing the injection needle, slides along the injection needle, the area being closer to an area on a side of the tip-end-side axial space than a portion, that faces the injection needle after the injection needle becomes fitted in the base-side axial space and the tip-end-side axial space;
wherein the easy sliding portion has an injection needle contact zone extending along a direction of movement of the easy sliding portion in opening of the connecting hinge;
wherein the injection needle contact zone is provided with a curved face extending from one end to the other end of the injection needle contact zone in the direction of the movement of the easy sliding portion in the opening of the connecting hinge;
wherein the connecting portion has:
a bottom plate portion that is disposed in the base-side axial space to be adjacent to a boundary between the base-side axial space and the intra-cylinder space and opposite ends of which are connected to the base-side wall portions,
a structural body portion protruding from an end portion of the bottom plate portion facing the intra-cylinder space toward the base-side axial space,
a curved face is provided to a portion of the bottom plate portion extending from the opposite face from a face facing the base-side axial space to the end portion, and
a flexible body portion that bends more in a direction from the tip-end-side axial space toward the base-side axial space than in a direction orthogonal to the direction from the tip-end-side axial space toward the base-side axial space when the force receiving portion receives the force from the injection needle, and wherein the flexible body portion has a plate-shaped portion disposed to be orthogonal to a bending direction, which is the direction from the tip-end-side axial space toward the base-side axial space,

wherein the plate-shaped portion faces one of the paired base-side wall portions with a clearance left therebetween, and
the force receiving portion faces the one of the paired base-side wall portions, which the plate-shaped portion faces with the clearance left therebetween, with a clearance left therebetween.

2. The injection-needle cover according to claim 1 , wherein the connected portion fitting space forming portion has a moment receiving portion for receiving moment about the base axis as a turning center.

3. The injection-needle cover according to claim 1 ,
wherein the injection needle enclosure portion further has a hook portion that protrudes into the base-side axial space and hooks the injection needle when the injection needle becomes fitted in the base-side axial space and the tip-end-side axial space,
the hook portion has:
a columnar portion disposed along the paired base-side wall portions in the base-side axial space,
a detachment preventing portion protruding from the columnar portion toward one of the paired base-side wall portions, and
an inclined face disposed from a tip end portion of the columnar portion to a tip end portion of the detachment preventing portion and inclined with respect to a direction along the paired base-side wall portions,
wherein the plate-shaped portion is connected to the base-side wall portion, toward which the detachment preventing portion is protruding, and faces the different base-side wall portion from the base-side wall portion, toward which the detachment preventing portion is protruding, with the clearance left therebetween.

4. The injection-needle cover according to claim 3 ,
wherein the flexible body portion has
a less deformable portion extending in a direction crossing the base-side wall portions and
a more deformable portion extending along the less deformable portion and being relatively more deformable than the less deformable portion.

5. The injection-needle cover according to claim 4 , wherein the more deformable portion is provided with a slit extending along the less deformable portion.

6. The injection-needle cover according to claim 3 , wherein the connected portion fitting space forming portion has a moment receiving portion for receiving moment about the base axis as a turning center.

7. The injection-needle cover according to claim 1 ,
wherein the flexible body portion has
a less deformable portion extending in a direction crossing the base-side wall portions, and
a more deformable portion extending along the less deformable portion and being relatively more deformable than the less deformable portion.

8. The injection-needle cover according to claim 7 , wherein the more deformable portion is provided with a slit extending along the less deformable portion.

Assignees

• Takeda Pharmaceuticals Co
• Yoshino Kogyosho Co Ltd
• Arte Corp

Inventors

• Okajima Kiyoshi
• Imanishi Yuki
• Asakawa Naoki
• Tanaka Nobuo
• CHUMA Yusuke

Classifications

• A61M5/3275 Primary

  being connected to the needle hub or syringe by radially deflectable members, e.g. longitudinal slats, cords or bands · CPC title

• A61M5/32

  Needles; Details of needles pertaining to their connection with syringe or hub (infusion needles A61M5/158); Accessories for bringing the needle into, or holding the needle on, the body {(A61M5/42, A61M5/46 take precedence; guide needles for catheters A61M25/065)}; Devices for protection of needles {(apparatus specially adapted for cleaning or sterilising needles A61M5/001)} · CPC title

• A61M5/3216

  Caps placed transversally onto the needle, e.g. pivotally attached to the needle base · CPC title

• A61M5/3204 Primary

  Needle cap remover, i.e. devices to dislodge protection cover from needle or needle hub, e.g. deshielding devices · CPC title

• A61M5/3245

  Constructional features thereof, e.g. to improve manipulation or functioning · CPC title