Touch pad module and computing device using same

A computing device, comprising:

• a casing, wherein a fixing frame is concavely formed in the casing;
• a processor disposed within the casing;
• and
• a touchpad module disposed within the casing and electrically connected with the processor, wherein the touchpad module comprises:
• a circuit board comprising a first conducting part and a second conducting part, wherein the second conducting part is arranged around the first conducting part, and the first conducting part and the second conducting part are not in contact with each other;
• a switch installed on the circuit board, and comprising a metal dome, wherein the metal dome comprises a first portion corresponding to the first conducting part and a second portion corresponding to the second conducting part, wherein when the switch is pushed by a triggering part, the metal dome is subjected to deformation and the first portion of the metal dome is contacted with the first conducting part, so that the first conducting part and the second conducting part are electrically connected with each other;
• and
• a conductive raised structure, wherein the conductive raised structure is disposed on the circuit board and arranged between the second conducting part and the second portion of the metal dome, so that a gap is formed between the circuit board and the second portion of the metal dome, wherein the gap is in a range between 0.1 millimeter and 0.5 millimeter.