The utility model provides an
epinephrine emergency automatic injection pen device, and belongs to the technical field of
medical treatment. The
epinephrine first-aid automatic injection pen device comprises a protection
assembly and an automatic injection
assembly and is provided with a bottom cover, a pen shell, a pen cap, a protection shell, a power sleeve, a main spring, a push rod, a rear sleeve, an auxiliary spring, a pre-filling
injector and a front sleeve, the pen cap is taken down firstly, the protection shell is pressed to push the rear sleeve, the rear sleeve slides to extrude a first clamping hook of the bottom cover, the power sleeve is released, and the automatic injection
assembly is started; the main spring restores elasticity to push the push rod and the power sleeve, the power sleeve pushes the pre-filling
syringe and the front sleeve, so that the needle head leaks out and is inserted into the
muscle layer, then the push rod pushes the pre-filling
syringe to conduct injection, and the needle head leaks out, is inserted into the
muscle layer and then injects liquid
medicine only by pulling out the pen cap. According to the utility model, not only is the accurate injection of liquid
medicine metering ensured, but also the operation steps are greatly simplified, the practicability and timeliness are improved, and precious time is won for
first aid.