Keyboard device and manufacturing method thereof

A manufacturing method of a keyboard device, the manufacturing method comprising steps of:

• (a) providing a flexible protection cover, wherein the flexible protection cover comprises a sheet-like main body and plural hollow protrusion structures, the plural hollow protrusion structures are formed on the sheet-like main body, and the plural hollow protrusion structures comprise respective top parts and respective lateral walls, wherein the top parts and the corresponding lateral walls are connected with each other, the lateral walls comprise respective elastic buffering parts, and plural covering parts are embedded into bottom surfaces of the corresponding top parts;
• (b) providing a keyboard base, wherein the keyboard base comprises plural key structures, and the plural key structures comprise respective keycaps;
• (c) placing the flexible protection cover over the keyboard base to have the hollow protrusion structures cover the corresponding key structures, and allowing the covering parts and the corresponding keycaps to be combined together;
• (d) providing a protective frame having a first surface, a second surface and plural openings, wherein the second surface is opposed to the first surface, the plural openings run through the first surface and the second surface, the plural openings are aligned with the corresponding hollow protrusion structures, and plural concave structures are formed in the second surface and arranged around peripheries of the corresponding openings;
• and
• (e) placing the protective frame over the flexible protection cover, wherein the plural hollow protrusion structures are partially penetrated through the corresponding openings and exposed outside the protective frame, and the elastic buffering parts are disposed within the corresponding concave structures and covered by the protective frame.