Knob structure and electronic device thereof

An electronic device, comprising:

• a case, with a through hole;
• a circuit board disposed under the through hole of the case, wherein the circuit board has a plurality of switch modules;
• and
• a knob structure disposed inside the through hole of the case, wherein the knob structure comprises:
• a plurality of pressing portions adjacent and aligned side by side for user to press, wherein at least one pressing portion has a pressing rib below respectively for pressing one of the switch module of the electronic device respectively;
• an elastic component comprising:
• a main body;
• and
• a plurality of elastic ribs disposed on the main body, wherein the at least one pressing portion connects to at least one elastic rib below and is supported by the corresponding elastic rib, such that when the at least one pressing portion is pressed along a supporting direction, the corresponding elastic rib is capable of providing an elastic force for resilience;
• and
• at least one fixing component comprising a first end and a second end, wherein the first end connects to at least one of the plurality of pressing portions, and the second end is extended along a direction different from the supporting direction and fixed to the case.