| 摘要 |
A control device includes a base frame, a bearing board hinged to the base frame at the top for holding an electronic device, a bracket hinged to the bearing board for supporting the bearing board on the base frame in a sloping position, a trackball device mounted in a front recess of the base frame in front of the bearing board and carrying a rolling bar in a rolling chamber thereof for rotating or moving by the user and a circuit module with a sensor module for sensing the direction and amount of rotation or displacement of the rolling bar and outputting a corresponding signal and a connection interface module for transmitting the output signal from the sensor module to the electronic device to control the cursor on the display screen of the electronic device.
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