Key device having a reinforced structure and method of making the same

A key device comprising:

• a key cap made of plastic and including top wall and a peripheral wall extending downwardly from a periphery of said top wall and cooperating with said top wall to define a receiving space, said top wall having a plurality of spaced-apart studs protruding into said receiving space;
• and a base plate unit disposed in said receiving space and riveted to said top wall through said studs, said base plate unit including a base plate made of metal and a plurality of engaging members secured to said base plate, said base plate including a plurality of stud holes for extension of said studs respectively therethrough, and a plurality of spaced-apart anchor members, said engaging members being injection molded to said anchor members, respectively;
• wherein said base plate has an upper side surface abutting against said top wall, and lower side surface opposite to said upper side surface, said base plate further including a plurality of hollows extending through said upper and lower side surfaces, said anchor members being formed by stamping said base plate, each of said anchor members having a first plate portion connected transversely to said lower side surface, and a second plate portion connected transversely to said first plate portion and formed with an aperture, said second plate portion being spaced apart from said lower side surface and corresponding in position to a respective one of said hollows.