Operation knob apparatus

An operation knob apparatus comprising:

• a base having a first surface facing a display panel and a second surface positioned on an opposite side of the display panel with respect to the first surface;
• a conductive transmitting member on the first surface of the base;
• an operation member on the second surface of the base so as to be movable relative to the base in a direction intersecting with the first surface, and configured to bring the transmitting member near to and away from the display panel;
• and
• a first stabilizer and a second stabilizer between the base and the operation member, each of the first stabilizer and the second stabilizer including:
• a main body extending in a first direction along the second surface of the base,
• a pair of arms that are connected to respective ends of the main body, and both of the pair of arms protruding in a same direction from the main body, and
• a pair of base portions respectively connected to the pair of arms, the base portions protruding in directions separating from the arms,
• wherein the first stabilizer and the second stabilizer are arranged with a space therebetween in a second direction intersecting with the first direction,
• wherein one of the base and the operation member includes a holding portion configured to rotatably hold the main body,
• wherein the other of the base and the operation member has a pair of holding grooves configured to hold the base portions slidably along the second surface and rotatably,
• wherein the main body of the first stabilizer has a first end positioned on one side in the first direction and a second end positioned in another side of the first direction, and
• wherein the main body of the second stabilizer has a first end positioned on the other side in the first direction with respect to the second end of the first stabilizer, and a second end positioned between the first end and the second end of the first stabilizer.