Touchpad device

A touchpad device comprising:

• a substrate;
• a top panel disposed above the substrate, wherein the touch panel has an inner surface facing the substrate, and the inner surface has a central region;
• a switch disposed between the substrate and the touch panel, wherein the switch corresponds to the central region;
• a balancing assembly disposed between the touch panel and the substrate, wherein the balancing assembly comprises a first balancing bar, a second balancing bar, a third balancing bar, and a fourth balancing bar arranged radially, wherein a first inner end of the first balancing bar is adjacent to the switch and has a first swing bar, a second inner end of the second balancing bar is adjacent to the switch and has a second swing bar, a third inner end of the third balancing bar is adjacent to the switch and has a third swing bar, and a fourth inner end of the fourth balancing bar is adjacent to the switch and has a fourth swing bar;
• and
• a triggering member disposed between the central region of the touch panel and the substrate, wherein the triggering member has top portion and a bottom portion, the bottom portion is leaned against end portions of the first swing bar, the second swing bar, the third swing bar, and the fourth swing bar, and the top portion contacts the switch.