Arte Corporation

Takeda Pharmaceutical Company Limited

Yoshino Kogyosho Co., Ltd.

Kiyoshi Okajima

Yuki Imanishi

Yusuke Chuma

Nobuo Tanaka

Seiji Shimazaki

Naoki Asakawa

Jiichi Arai

The present invention suppresses the amount of fluid pushed out from an injection needle when confirming whether air has been pushed out of the injection needle. Provided is a syringe that comprises: a cylinder; an injection needle; a needle base; an injection needle cover; and a plunger rod. The needle basecommunicates between the inside of the cylinderand the inside of the injection needle. The injection needle cover, when extended from a folded state, surrounds the injection needle. The injection needle covercomprises an injection needle surrounding part. The injection needle surrounding part has at least one cutoutin a section facing the needle baseand covering the needle base, such that the needle basecan be identified from the outside.

Syringe

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.

Injection-needle cover

A manufacturing method of two-chamber type combined container-syringe including: a vacuum plugging process (S) of eliminating air bubbles from the dissolving solution of the dissolving solution-filled cartridge and sealing the dissolving solution with a middle stopper after the dissolving solution filling process (S); a vacuum plugging process (S) has a first cooling processing (S) of cooling the inside of a vacuum plugging equipment in which a dissolving solution-filled cartridge is disposed to a cooling temperature that does not freeze the dissolving solution, a first decompression processing (S) of decreasing a pressure inside the vacuum plugging equipment while the vacuum plugging equipment maintains the cooling temperature after the first cooling processing (S), and a middle stopper pushing processing (S) of pushing the middle stopper downward and bringing the middle stopper into contact with the dissolving solution after the first decompression processing (S). The dissolving solution can be easily filled in a bubble-free state in the two-chamber type combined container-syringe.

Manufacturing method of two-chamber type combined container-syringe

Growing community of inventors

Takahagi, Japan

Kiyoshi Okajima