Patent ID: 8218301

Claim:
A keyboard comprising: a casing made from a metallic sheet and having upper and lower parts, said upper part having front and rear ends opposite to each other in a first direction, said lower part being bent from said front and rear ends of said upper part so as to define a gap between said upper and lower parts and two opposite side openings of said casing opposite to each other in a second direction transverse to the first direction, said casing being formed with a central hole extending through said upper part and in spatial communication with said gap and said side openings; a retaining frame received detachably in said gap of said casing and having a loop-shaped frame body disposed around said central hole of said casing, said retaining frame being insertable through one of said side openings of said casing into said gap of said casing; and a keyboard module received in said central hole of said casing, engaging said frame body of said retaining frame in a tongue-and-groove engaging manner, and having a plurality of pressable key caps protruding outwardly through said central hole of said casing.