Patent ID: 8354182

Claim:
A battery box, comprising: a main body defining a battery cavity and comprising a sidewall, the battery cavity receiving a battery and comprising a bottom, the sidewall defining a first receiving space and a second receiving space communicating with the first receiving space, the first receiving space being substantially parallel to the bottom of the battery cavity and the second receiving space being substantially perpendicular to the bottom of the battery cavity, and a top of the sidewall defining a stopper portion received in the first receiving space; and a battery mounting mechanism, comprising: a shaft comprising two opposite ends fixed in the first receiving space, one end of the shaft adjacent to the second receiving space being nearer to the battery cavity than the other end of the shaft; a fixing member rotatable relative to and slidable along the shaft and engaging with the stopper portion, the fixing member being adjacent to the second receiving space and a portion of the fixing member being received in the battery cavity; and a first elastic member substantially perpendicularly received in the second receiving space; wherein when the battery is pressed toward the bottom of the battery cavity, the portion of the fixing member received in the battery cavity is pressed by the battery, causing the fixing member to rotate until the fixing member moves out of the battery cavity, during the rotation of the fixing member, the first elastic member is compressed, and when the fixing member moves out of the battery cavity, the battery is further pressed until the battery is received in the battery cavity, when the battery is received in the battery cavity, the first elastic member rebounds to cause the fixing member to return to its original state, thus the fixing member hooks on the stopper portion and presses the battery to fix the battery in the battery cavity; when the fixing member is pushed to slide away from the second receiving space along the shaft until the fixing member moves out of the battery cavity, the battery is released and is able to be taken out of the battery cavity.