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.