Operation input device

An operation input device comprising:

• an exterior portion that includes a housing and a band portion extending in a belt shape;
• a control unit housed in the exterior portion and programmed to perform processing based on a detection signal;
• and
• a deformation detection unit disposed in one of the band portion and the housing, the deformation detection unit outputting the detection signal associated with a deformation of the band portion or a deformation of the housing to the control unit,
• wherein
• the exterior portion includes a body portion that is more rigid than the band portion and which houses the control unit, and
• the band portion includes:
• a first part adjacent to a first edge of the body portion in an extending direction of the band portion, and
• a second part adjacent to a second edge of the body portion in the extending direction of the band portion, and
• the deformation detection unit is attached to the first part of the band portion,
• wherein the deformation detection unit is a first deformation detection unit, and the operation input device further comprises a second deformation detection unit attached to the second part of the band portion,
• wherein
• the first deformation detection unit senses a first form of deformation of the band portion, and
• the second deformation detection unit senses the first form of deformation, and
• the operation input device further comprises a third deformation detection unit in the first part of the band portion, wherein the third deformation detection unit senses a second form of deformation of the band portion different from the first form of deformation.