An electronic device includes a panel, a base, a button, and a balance bar. The panel defines an opening. The base is fixed to a rear side of the panel. A switch and a resilient resisting portion are mounted to a front surface of the base. The button is sandwiched between the panel and the base. The button is partially received in the opening. Two pivot portions are formed a rear side of the button. The balance bar includes a first bar abutting against the resisting portion, two second bars respectively extending from opposite ends of the first bar, and two feet respectively extending from distal ends of the second bars to pivotably connect the pivot portions. When the button is pressed, the balance bar restricts the button to just move linearly to the switch.