Rotary switch mechanism

A rotary switch mechanism, comprising:

• a hollow cylinder having a hollow portion in a center thereof;
• a base disposed under said hollow cylinder, and having a perforation;
• a push button comprising a pressing surface and a pressing rod extended from said pressing surface, wherein said pressing surface is disposed over said hollow cylinder, and said pressing rod is penetrated through said hollow cylinder and said perforation of said base and protruded outside a bottom of said base;
• a first rotatable member sheathed around said hollow cylinder, and freely rotatable with respect to said hollow cylinder;
• a second rotatable member sheathed around said first rotatable member, and freely rotatable with respect to said first rotatable member;
• a first switch disposed beside said first rotatable member, wherein when said first rotatable member is rotated, said first rotatable member and said first switch interact with each other to generate a first rotating signal;
• a second switch disposed beside said second rotatable member, wherein when said second rotatable member is rotated, said second rotatable member and said second switch interact with each other to generate a second rotating signal;
• and
• a third switch mounted on a first circuit board, which is disposed under said base, wherein when said push button is pressed down, said third switch is triggered by said pressing rod to generate a pressing signal.