Disposable injection device with locking structure to prevent reuse

Abstract

A disposable injection device according to an embodiment has a locking structure to prevent reuse in which, in a state where a locking module accommodating a liquid cartridge in which the injection of an injection solution is completed is additionally pressed, when the pressing force is removed, the pressed locking module is raised and lowered due to a restoring force of an elastic spring located in a compressed state at a lower end of the locking module and locked to an outer housing, and thus the locking module is prevented from being further pressed, and smoothly separates the locking module from the outer housing through a separation guide portion having a tapered shape and formed on an upper end of the outer housing through a pressure head constituting an upper portion of a pressurizing piston unit in a state where in the injection of the injection solution is completed.

CPC Classifications