Rotary electronic component

A rotary electronic component, comprising:

• a base member;
• a shaft attached to the base member so as to be rotatable around an axis;
• and
• a regulating member that regulates a rotation angle of the shaft;
• wherein
• the shaft includes a flange section including a plurality of projecting sections and a plurality of recessed sections alternately disposed in a circumferential direction;
• the regulating member includes:
• a contact member in contact with the projecting sections and the recessed sections of the flange section of the shaft;
• and
• a biasing member that biases the contact member radially inwardly toward the shaft;
• the contact member includes a first end rotatably connected to the base member, and a second free end in contact with the projecting sections and the recessed sections of the shaft;
• and
• the biasing member is locked on the second free end of the contact member.