User interface device

A user interface device to be gripped by a user, the user interface device comprising:

• a grip including dimensions in a radial direction and a circumferential direction and extending in a longitudinal direction;
• and
• at least one optical sensor provided at the grip and including:
• a proximity sensor including a light emitter and a light receiver;
• and
• a force sensor to detect a contact force by an object;
• the proximity sensor is operable to emit light from the light emitter to a predetermined detection range around the force sensor, and detect a state in which the object is in proximity to the force sensor in accordance with a light reception result obtained by light incident from the detection range to be received by the light receiver;
• and
• the detection range is biased to one side in the circumferential direction from a position of the force sensor in the grip toward an outer side portion in the radial direction, and is wider in the circumferential direction than in the longitudinal direction.