PEN TYPE INJECTION DEVICE

摘要

PURPOSE:To prevent the wasteful leakage of a chemical by preventing a motor from being started while in nonuse. CONSTITUTION:A cartridge filled with a chemical and a pressing means pressing the cartridge via motor serving as a driving source are stored in a slender cylindrical barrel 1. A circuit section controlling the motor and a battery are stored in a slender cylindrical cap 2 removably connected to the barrel 1. One end section of the barrel 1 is connected to the cap 2 so that an injection needle 10 is covered by the cap 2 while in nonuse. When the other end section of the barrel 1 is connected to the cap 2, the barrel 1 and the cap 2 are electrically connected while in use.