Light-emitting rotary knob and flushing toilet cover

A light-emitting rotary knob, comprising a rotary knob body, wherein further comprising a connecting base and a PCB, wherein a plurality of LED light-emitting bodies are mounted on the PCB, a connecting concave hole is formed in one end of the connecting base, the rotary knob body is provided with a concave cavity and connected with the connecting base in a sleeving mode through the other end of the connecting base by means of the concave cavity, the PCB is mounted on the connecting base, and the multiple LED light-emitting bodies guide out light through the rotary knob body;

• wherein the connecting base comprises a cylindrical body, a protruding part extends out from the middle of one end of the cylindrical body, the connecting concave hole extends into the cylindrical body from the end face of the protruding part, a through hole is formed in the middle of the PCB, the protruding part is sleeved with the PCB through the middle through hole, the multiple LED light-emitting bodies are distributed around the through hole, and the cylindrical body is located in the concave cavity,
• wherein at least one positioning protrusion is arranged on the outer circumferential surface of the protruding part, at least one positioning groove is formed in the inner circumferential surface of the through hole in the middle of the PCB, and the positioning groove is matched with the positioning protrusion.