US Patent 11449156 Touchpad device

A touchpad device includes a substrate, a circuit board, a resilient member, an annular plate, a first linkage member, and a second linkage member. The circuit board is disposed above a top surface of the substrate. The resilient member, the first linkage member, and the second linkage member are disposed between the substrate and the circuit board. The annular plate is fixed around a bottom surface of the circuit board and includes an inner periphery. The inner periphery includes a first side, a second side, a third side, and a fourth side connected to each other. The first linkage member includes a first swing plate, and the first swing plate includes a first outer side and a first inner side. The first inner side is swingably connected to the substrate, and the first outer side is sandwiched between the first limiting member and the circuit board.