Patent ID: 8081488

Claim:
A portable electronic device, comprising: a casing provided therein with a compartment for a cartridge body as a component, the compartment being given an opening for the installation of the cartridge body; a cover body pivotally supported on said casing to open and close said opening, and is capable of being held in a position for closing the opening; a spring part for causing the cartridge body inside said compartment to be spring-biased in a direction toward said opening; a lock lever provided to said casing, the lock lever being capable of moving back and forth between a locking position entering said opening and a lock releasing position retreating from the opening, while being spring-biased in a direction from the lock releasing position to the locking position; and a pressure applying part formed on the inner surface of said cover body, said pressure applying part pressing the lock lever placed in the lock releasing position toward the locking position immediately before the cover body is completely closed.