An input device , comprising: a circuit board ; a wheel , having a rotary shaft ; a supporting frame , configured to support the wheel and adapted to be driven by the wheel , wherein the supporting frame comprises: a body , wherein the wheel is pivotally connected to the body by the rotary shaft , allowing the wheel to rotate relative to the body and drive the supporting frame to press downward and tilt toward at least one side edge; at least one extension arm , disposed at the side edge of the body ; a first supporting portion , arranged on an end of the body to be pivoted to a pivotal connection portion of the circuit board , so that the body can be driven by the wheel to press downward; and; a second supporting portion , connected to the body and supporting the circuit board , wherein the second supporting portion is disposed between the rotary shaft and the first supporting portion , wherein the at least one extension arm is disposed between the second supporting portion and the first supporting portion ; a push button switch , disposed on the circuit board and between the second supporting portion and the first supporting portion , wherein when the wheel is pressed, the wheel drives the body to press downward to trigger the push button switch ; and; at least one tilt switch , disposed on the circuit board and corresponding to the at least one extension arm , wherein when the wheel tilts, the wheel drives the at least one extension arm to tilt to trigger the at least one tilt switch . a circuit board ; a wheel , having a rotary shaft ; a supporting frame , configured to support the wheel and adapted to be driven by the wheel , wherein the supporting frame comprises: a body , wherein the wheel is pivotally connected to the body by the rotary shaft , allowing the wheel to rotate relative to the body and drive the supporting frame to press downward and tilt toward at least one side edge; at least one extension arm , disposed at the side edge of the body ; a first supporting portion , arranged on an end of the body to be pivoted to a pivotal connection portion of the circuit board , so that the body can be driven by the wheel to press downward; and; a second supporting portion , connected to the body and supporting the circuit board , wherein the second supporting portion is disposed between the rotary shaft and the first supporting portion , wherein the at least one extension arm is disposed between the second supporting portion and the first supporting portion ; a body , wherein the wheel is pivotally connected to the body by the rotary shaft , allowing the wheel to rotate relative to the body and drive the supporting frame to press downward and tilt toward at least one side edge; at least one extension arm , disposed at the side edge of the body ; a first supporting portion , arranged on an end of the body to be pivoted to a pivotal connection portion of the circuit board , so that the body can be driven by the wheel to press downward; and; a second supporting portion , connected to the body and supporting the circuit board , wherein the second supporting portion is disposed between the rotary shaft and the first supporting portion , wherein the at least one extension arm is disposed between the second supporting portion and the first supporting portion ; a push button switch , disposed on the circuit board and between the second supporting portion and the first supporting portion , wherein when the wheel is pressed, the wheel drives the body to press downward to trigger the push button switch ; and; at least one tilt switch , disposed on the circuit board and corresponding to the at least one extension arm , wherein when the wheel tilts, the wheel drives the at least one extension arm to tilt to trigger the at least one tilt switch . <EOS>