Input device

An input device comprising:

• a fixed unit;
• a rotary member rotatably supported by the fixed unit;
• a rotation-detecting unit that detects a rotation angle of the rotary member;
• a brake-applying unit that applies a braking force to the rotary member;
• a torque-applying unit that applies a driving torque to the rotary member;
• and
• a control unit that controls the brake-applying unit and the torque-applying unit,
• wherein the brake-applying unit includes:
• magnetorheological fluid;
• a brake-applying coil that applies a magnetic field to the magnetorheological fluid;
• a shaft to which braking torque that changes with viscosity of the magnetorheological fluid is applied;
• and
• a transmission gear provided on the shaft, the transmission gear being in mesh with a gear provided on the rotary member,
• wherein the shaft is positioned on an outer side with respect to the rotary member in a radial direction of the rotary member,
• wherein the fixed unit is made of a non-magnetic material and includes a cylindrical supporting portion extending in a direction of a rotation axis of the rotary member,
• wherein the torque-applying unit includes:
• a plurality of torque-applying coils arranged in a circumferential direction of an outer circumferential surface of the supporting portion;
• and
• a magnet that faces the plurality of torque-applying coils with an interval, the magnet being annular and provided on an outer side with respect to the plurality of torque-applying coils,
• wherein the magnet is positioned on an inner side with respect to the rotary, member and rotates along with the rotary member, and
• wherein the control unit controls current to be supplied to the plurality of torque-applying coils, the current being controlled in accordance with the rotation angle of the rotary member.