Patent ID: 7817312

Claim:
An image acquiring device, comprising: a scanning module, which comprises: a scanning unit for scanning a document to obtain an electrical document signal; a first signal converter, connected to the scanning unit, for converting the electrical document signal into an optical document signal; and a first signal transmitting unit, connected to the first signal converter, for receiving and outputting the optical document signal; an optical signal transmission medium connected to the first signal transmitting unit; and a mainboard module, which comprises: a mainboard; a second signal transmitting unit, mounted on the mainboard and connected to the optical signal transmission medium, for receiving the optical document signal; and a second signal converter, mounted on the mainboard and connected to the second signal transmitting unit, for converting the optical document signal into the electrical document signal; wherein: the scanning module is movable relative to the mainboard; and the scanning module further comprises a rechargeable battery, which is charged when the scanning module is resting at a home position, and is discharged when the scanning module moves away from the home position to serve as a stand-alone power source for the scanning module.