Patent ID: 11870336
Assignee: PRIMAX ELECTRONICS LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 8:
9. An input device, comprising:
a main body;
a first connecting port installed on the main body;
at least two second connecting ports installed on the main body;
a power switching circuit electrically connected with the first connecting port and the at least two second connecting ports; and
a control unit electrically connected with the power switching circuit, the first connecting port and the at least two second connecting ports,
wherein when the control unit detects that the first connecting port is connected with an external power source, the control unit issues a first switching signal to the power switching circuit, so that the first connecting port is enabled to receive a first voltage from the external power source,
wherein when the control unit detects that a selected second connecting port of the at least two second connecting ports is connected with a connecting port of an adjacent input device, the control unit issues a second switching signal to the power switching circuit, wherein in response to the second switching signal, the first voltage is converted into a second voltage by the power switching circuit, and the selected second connecting port is enabled to transmit the second voltage to the adjacent input device.