Rotary plug

A rotary plug comprising:

• a base whereon an accommodating space is formed;
• a first annular slot structure disposed on an inner wall of the accommodating space, a first hole being formed on the first annular slot structure;
• a second annular slot structure disposed on the inner wall of the accommodating space and different from a position of the first annular slot structure, a second hole being formed on the second annular slot structure;
• a first conductive component disposed inside the first annular slot structure, the first conductive component comprising a first protrusion, and the first protrusion inserting into the first hole;
• a second conductive component disposed inside the second annular slot structure, the second conductive component comprising a second protrusion, and the second protrusion inserting into the second hole;
• a bridging component rotatably disposed inside the accommodating space;
• a positive terminal, a first end of the positive terminal protruding from a bottom surface of the bridging component, a second end of the positive terminal protruding from a lateral surface of the bridging component and movably inserting into the first annular slot structure for contacting the first conductive component;
• and
• a negative terminal, a first end of the negative terminal protruding from the bottom surface of the bridging component, a second end of the negative terminal protruding from the lateral surface of the bridging component and movably inserting into the second annular slot structure for contacting the second conductive component.