Touch input device

A touch input device comprising:

• a base board unit that has a first side rib extending in a first direction, a second side rib extending in the first direction and opposite to said first side rib in a second direction transverse to the first direction, a top surface, a bottom surface, and an opening formed at a middle portion of said second side rib, said opening being elongate and having two opening ends that are respectively defined by two end walls and that are opposite to each other in the first direction, and an intermediate opening portion located between said two opening ends;
• an upper board unit that is disposed on and above said base board unit, and that has a first side connected to said first side rib of said base board unit and a second side opposite to said first side of said upper board unit in the second direction and movable relative to said second side rib of said base board unit, a touched sensing module disposed at a middle portion of said second side of said upper board unit;
• and
• a touched unit mounted to said base board unit, and including a pair of positioning seats which respectively abut against said end walls, a touched portion which is disposed between said positioning seats and which corresponds in position to said intermediate opening portion, and a pair of resilient arms, each interconnecting said touched portion and a respective one of said positioning seats;
• when an external force is exerted on said touched sensing module, said touched sensing module is moved into contact with said touched portion such that said touched portion is moved toward said bottom surface by resilient deformation of said resilient arms.