TWI840258B

A turning operation unit (13) comprises a Hall IC (132) that detects the turning angle of a wheel (131), a fluid brake (133) that uses MR fluid to apply a load against the turning of the wheel (131), and a control IC (134) that performs current supply control for adjusting the load by the fluid brake (133). As the current supply control by the control IC (134), there can be provided main current supply control that provides click feeling to the turning operation of the wheel (131) and non-current supply control that does not apply any load to the turning operation of the wheel (131). The Hall IC (132) can detect the turning angle of the wheel (131) in a unit of the angle of less than 0.5 degrees. The turning operation unit (13) has an operation mode in which the non-current supply control is performed while the Hall IC (132) is detecting no output change and the main current supply control is started when the Hall IC (132) detects an output change.