noun
input unit; input device
Computing term for a hardware component or device that receives data or signals.
この入力機構はUSBで接続します。
This input device connects via USB.
入力装置 is a more common term for 'input device'; 入力機構 is less frequent and may emphasize the mechanical or structural aspect.
Compound of 入力 (input) and 機構 (mechanism, organization).