Cap, syringe assembly, and prefilled syringe

Patent metadata

Field	Value
Publication number	US-11273264-B2
Application number	US-201916367035-A
Country	US
Kind code	B2
Filing date	Mar 27, 2019
Priority date	Sep 30, 2016
Publication date	Mar 15, 2022
Grant date	Mar 15, 2022

Abstract

A syringe assembly includes a prefilled syringe and a cap. A cap body is configured to be displaced from a first position where a viewing portion is positioned in a cylindrical main body to a second position where the viewing portion protrudes in a distal end direction from an opening of the cylindrical main body. When a mounting tube portion of the cap removed from a syringe body is brought close to a nozzle portion of the syringe body, the cap body is pressed in the distal end direction by the nozzle portion, thereby being displaced from the first position to the second position, and the appearance of an outer peripheral portion of the viewing portion changes.

First claim

What is claimed is:

1. A cap that is detachable from a syringe body that comprises: a body portion that is configured to accommodate a drug, and a nozzle portion that protrudes in a distal direction from a distal end portion of the body portion and comprises a drug discharge port at a distal end of the nozzle portion, the cap comprising:
a cap body comprising:
a mounting portion that is configured to be mounted on the nozzle portion and that comprises a sealing portion that seals the drug discharge port in a liquid-tight manner, and
a viewing portion that is positioned distal of the mounting portion;

a tubular cap cover that covers the cap body and comprises a cylindrical main body that comprises an opening at a distal end of the cylindrical main body;
a distal end cover member that is mounted on a distal end portion of the cap cover and comprises:
an annular peripheral wall portion that extends in a distal direction from the opening of the cylindrical main body, and
a distal end wall that is disposed at a distal end of the annular peripheral wall portion,
wherein the annular peripheral wall portion and the distal end wall form a receiving space; and

an engaging portion that inhibits detachment of the cap body in a proximal end direction with respect to the cap cover by engagement with the cap body;
wherein the cap body is configured to be displaced in the cap cover along an axial direction of the cap cover from a first position at which the viewing portion is positioned in the cylindrical main body to a second position at which the viewing portion protrudes in a distal direction from the opening of the cylindrical main body into the receiving space;
wherein the sealing portion is configured to seal the nozzle portion in a liquid-tight manner in a state in which the cap body is positioned at the first position;
wherein the mounting portion is configured to be pressed in a distal direction by the nozzle portion of the syringe body so as to displace the cap body from the first position to the second position when the mounting portion of the cap removed from the syringe body is brought close to the nozzle portion of the syringe body in a state in which the cap body is disposed at the first position;
wherein at least an outer peripheral portion of the viewing portion changes in appearance by the viewing portion protruding from the opening due to displacement of the cap body from the first position to the second position; and
wherein the cylindrical main body and the distal end cover member cover the cap body such that a user operating the cap cannot touch the cap body in an abutting state in which the cap body is positioned at the second position and the mounting portion abuts against the nozzle portion of the syringe body.

2. The cap according to claim 1 , wherein:
a distal end of the annular peripheral wall portion is closed by the distal end wall.

3. The cap according to claim 1 , wherein:
the distal end cover member is transparent and the cylindrical main body is opaque.

4. The cap according to claim 1 , wherein:
the distal end cover member comprises an engagement extending portion that extends from a proximal end of the annular peripheral wall portion into the cylindrical main body through the opening; and
the distal end cover member is mounted on the cylindrical main body by engagement of the engagement extending portion with an inner peripheral surface of the cylindrical main body.

5. The cap according to claim 4 , wherein:
the distal end cover member comprises a positioning projection that protrudes from an outer peripheral surface of a proximal end portion of the annular peripheral wall portion; and
movement of the distal end cover member (in a proximal direction with respect to the cylindrical main is inhibited by the positioning projection abutting against a distal end surface of the cylindrical main body.

6. The cap according to claim 4 , wherein:
the distal end cover member comprises an annular portion that comprises the annular peripheral wall portion and the engagement extending portion;
an inner diameter of the annular portion is constant from a distal end of the annular portion to a proximal end of the annular portion and is larger than an outer diameter of the viewing portion; and
at least a distal end of the viewing portion is positioned in the annular portion when the cap body is at the first position.

7. The cap according to claim 1 , wherein:
the cap cover is opaque; and
an outer peripheral portion of the viewing portion is not visible when the cap body is at the first position, and the outer peripheral portion of the viewing portion is visible when the cap body is at the second position.

8. The cap according to claim 1 , wherein:
the viewing portion is disposed at a distal end of the cap body.

9. A syringe assembly comprising:
a syringe body that comprises:
a body portion that is configured to accommodate a drug, and
a nozzle portion that protrudes in a distal direction from a distal end portion of the body portion and comprises a drug discharge port at a distal end of the nozzle portion;

a cap that is detachable from the syringe body and comprises:
a cap body comprising:
a mounting portion that is mounted on the nozzle portion and that comprises a sealing portion that seals the drug discharge port in a liquid-tight manner, and
a viewing portion that is positioned distal of the mounting portion;

a tubular cap cover that covers the cap body and comprises a cylindrical main body that comprises an opening at a distal end of the cylindrical main body,
a distal end cover member that is mounted on a distal end portion of the cap cover and comprises:
an annular peripheral wall portion that extends in a distal direction from the opening of the cylindrical main body, and
a distal end wall that is disposed at a distal end of the annular peripheral wall portion,
wherein the annular peripheral wall portion and the distal end wall form a receiving space, and

an engaging portion that inhibits detachment of the cap body in a proximal end direction with respect to the cap cover by engagement with the cap body;

wherein the cap body is configured to be displaced in the cap cover along an axial direction of the cap cover from a first position at which the viewing portion is positioned in the cylindrical main body to a second position at which the viewing portion protrudes in a distal direction from the opening of the cylindrical main body into the receiving space;
wherein the sealing portion is configured to seal the nozzle portion in a liquid-tight manner in a state in which the cap body is positioned at the first position;
wherein the mounting portion is configured to be pressed in a distal direction by the nozzle portion of the syringe body so as to displace the cap body from the first position to the second position when the mounting portion of the cap removed from the syringe body is brought close to the nozzle portion of the syringe body in a state in which the cap body is disposed at the first position;
wherein at least an outer peripheral portion of the viewing portion changes in appearance by the viewing portion protruding from the opening due to displacement of the cap body from the first position to the second position; and
wherein the cylindrical main body and the distal end cover member cover the cap body such that a user operating the cap cannot touch the cap body in an abutting state in which the cap body is positioned at the second position and the mounting portion abuts against the nozzle portion of the syringe body.

10. The syringe assembly according to claim 9 , wherein:
an outer diameter of the viewing portion is larger than an

Assignees

• Terumo Corp

Inventors

• Okihara Hitoshi

Classifications

• A61M5/3202 Primary

  Devices for protection of the needle before use, e.g. caps (A61M5/50 takes precedence; for infusion spikes A61M5/1626; protectors for sharps A61B50/3001) · CPC title

• A61M5/3204

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

• A61M5/50

  having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile {(retractable needles or needle protectors with means for preventing re-use A61M5/321)} · CPC title

• A61M2005/3125

  specific display means, e.g. to indicate dose setting · CPC title

• A61M5/5086

  for indicating if defective, used, tampered with or unsterile · CPC title