Mouse device

A mouse device, comprising:

• a lower casing;
• a circuit board, wherein a switch module is disposed on the circuit board, and the circuit board is located over the lower casing;
• an upper casing having a slot, wherein the upper casing and the lower casing are combined together;
• a button comprising a push structure, wherein the push structure comprises a contacting portion corresponding to the switch module, the push structure is penetrated through the slot, and the button is pivotally coupled to the upper casing, so that the button is permitted to be swung relative to the upper casing;
• and
• an elastic element arranged between the contacting portion and the upper casing,
• wherein two ends of the elastic element are respectively contacted with the contacting portion and the upper casing, so that the contacting portion is in contact with the switch element;
• wherein the elastic element is a compression spring, and an elastic force provided by the compression spring is lower the 10 g, so that the contacting portion is in contact with the switch module but the switch module is not triggered, and wherein a first surface of the contacting portion is in contact with the switch module, and a position-limiting post is protruded from a second surface of the contacting portion, wherein the position-limiting post is penetrated through the compression spring to the position the compression spring.