Terumo Kabushiki Kaisha

Minami Maekawa

Yoichiro Iwase

Manabu Arinobe

Kentaro Nakajima

Yusuke Hyakkan

Eiji Kawamoto

Yasuyuki Yoshida

This liquid medicine administration device includes a liquid medicine container, a gasket for expelling the liquid medicine in the liquid medicine container, a plunger that moves the gasket, a housing, a drive mechanism that advances the plunger, and a rotation restriction unit that restricts rotation of the plunger. The drive mechanism includes a motor and a feed screw. The plunger includes: a threaded portion threadedly engaged with the feed screw; and a plunger body that advances with feed screw rotation and that moves the gasket, while rotation of the plunger relative to the housing is restricted by the rotation restriction unit. The plunger includes a canceling mechanism that cancels transmission of a pressing force from the plunger body to the gasket when the plunger body receives an axial reaction force equal to or greater than a preset pressing force from the gasket during advancement with the feed screw rotation.

Liquid medicine administration device

There are provided an intradermal needle, a packaged article, and an injection device. The intradermal needle includes: a tubular needle that has a needle tip capable of puncturing a living body; a needle hub that holds the tubular needle; a flange part that extends in a flange shape from the needle hub; and a ring projection that extends toward a leading end of the flange part and is formed in a cylindrical shape to surround the tubular needle. The flange part has a cut portion formed by partially cutting to achieve downsizing of the flange part.

Intradermal needle, packaged article, and injection device

Growing community of inventors

Kanagawa, Japan

Minami Maekawa