Button assembly

A button assembly, disposed in a joystick, the button assembly including:

• a base, a middle of the base having an accommodating groove, the base having two lower pivoting portions with each of the two lower pivoting portions protruding outwardly from respective sides of the base;
• a pressure sensor, mounted in the accommodating groove of the base;
• and
• a keycap, overlying the pressure sensor, a bottom surface of the keycap having a contact portion, the contact portion being engaged with a top surface of the pressure sensor, the keycap having two upper pivoting portions with each of the two upper pivoting portions protruding outwardly from respective sides of the keycap, the two lower pivoting portions being pivoted with the two upper pivoting portions to enable the two upper pivoting portions to be rotatable relative to the two lower pivoting portions;
• wherein each of the two lower pivoting portions includes a lower extension part, a flange and two locking blocks, a side of the base extends outwardly to form the lower extension part, an end of the lower extension part protrudes upwardly to form the flange, free ends of the flange further respectively protrude upwardly to form two locking blocks, each of the two locking blocks has a notch, the flange and the two locking blocks are partially recessed to form a pivoting groove, the notch connects with the pivoting groove.