Patent ID: 7859833

Claim:
A function expansion device for expanding function of an electronic device attached thereto, comprising: a housing containing an electronic component; and a lock-releasing lever attached to the housing and movable between a locking position in which the lock-releasing lever contacts the housing and a lock-releasing position to which the lock-releasing lever moves in response to a lock-releasing operation, the lock-releasing lever locks the electronic device so that the electronic device cannot be removed when the lock-releasing lever is in the locking position and unlocks the electronic device in response to an operation of moving the lock-releasing lever from the locking position to the lock-releasing position, wherein the housing and the lock-releasing lever have respective holes for aligning with each other when the lock-releasing lever is in the locking position, the aligned holes operate as a security slot to which a locking member for locking the electronic device to the function expansion device for theft prevention is attachable.