Touch input device

A touch input device comprising:

• a base board unit that includes 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, and a bottom surface, an intermediate portion disposed at a middle portion of said second side rib, two flanking portions flanking said intermediate portion and opposite to each other in the first direction, two slots extending through said top surface and said bottom surface and formed respectively through said flanking portions, and two resilient arms each of which extends from said intermediate portion into a corresponding one of said two slots;
• and
• an upper board unit that is disposed on and above said base board unit, and that includes a first side connected to said first side rib of said base board unit and a second side corresponding in position to said second side rib of said base board unit and movable relative to said second side rib of said base board unit, and a pair of touch sensing modules respectively corresponding in position to and spaced apart from said resilient arms;
• when an external force is exerted on one of said touch sensing modules, said one of said touch sensing modules is moved into contact with a corresponding one of said resilient arms such that the other one of said resilient arms supports the other one of said touch sensing modules by resilient deformation.