Passive rebound switch having variable number of buttons

A passive rebound switch;

• comprising:
• a housing;
• at least an actuation button detachably and pivotally coupled at said housing to define a receiving chamber between said actuation button and said housing, wherein said actuation button is actuated, in response to an external force applied thereon, in a reciprocated rebounding movement between an idle position and an actuated position;
• an energy generation module being actuated and triggered by said reciprocated rebounding movement of said actuation button for converting a mechanical energy of the external force into an electrical energy;
• at least an energy collecting module disposed between said actuation button and said power generation module;
• at least a detection control received in said receiving chamber to detect said actuation button between said idle position and said actuated position, and being actuated by said reciprocated rebounding movement of said actuation button at the same time when said energy generation module is actuated;
• and
• a signal transmission module being pre-activated by said detection control before said energy generation module generates the electrical energy, wherein said signal transmission module is configured for transmitting a control signal after said signal transmission module is powered by said energy generation module.