Multi-functional key module

A multi-functional key module, configured to be installed in an electrical appliance, comprising a hollow main housing, a pin that passes through an upper end of the main housing from the inside of the main housing upwards, an electronic key fixedly installed at the bottom of the inside of the main housing, and an optical tracking chip arranged inside the main housing and towards a side surface of the pin;

• wherein
• an upper end of the pin is fixedly connected to a key cap;
• a contact trigger end of the electronic key is arranged towards the pin, and the electronic key gives an electrical signal when triggered by contact;
• the optical tracking chip emits a detection laser to the side surface of the pin and receives reflected light from the side surface of the pin, and the optical tracking chip determines a motion state of the pin according to the reflected light and generates an electrical signal;
• and
• the electronic key and the optical tracking chip are electrically connected,
• wherein a lower end of the pin has a pin seat that prevents the pin from being completely pulled out from the upper end of the main housing.