Rotary input device and electronic equipment

A rotary input device, comprising:

• a rotary operation device rotatable around a shaft by receiving a rotation operation of an operator;
• an ultrasonic motor as a rotation driving section to apply a rotary force to the rotary operation device;
• a force sense presenting section to present the operator a force sense by a combination of at least any two of:
• i) applying the rotary force in a clockwise direction to the rotary operation device by the rotation driving section, ii) applying the rotary force in a counterclockwise direction, and iii) stopping applying the rotary force;
• a display control section to make a display section display a predetermined image;
• and
• a magnification ratio change instructing section to instruct the display section to change a display magnification ratio of an image under display;
• a scroll instructing section to instruct the display control section to scroll the image under display;
• wherein
• the magnification ratio change instructing section instructs enlargement of the image under display when the rotary operation device rotates in any one side of the clockwise direction and the counterclockwise direction, and instructs reduction of the image under display when the rotary operation device rotates in the other side,
• the scroll instructing section instructs the display control section to change a display position of the image under display with respect to a display area in response to the scroll instruction,
• the force sense presenting section changes a way of presenting the force sense in order that the operator can perceive a display state pertaining to the display position or the display magnification ratio of the image under display distinguishably,
• the ultrasonic motor includes:
• a piezoelectric element which generates an ultrasonic vibration when a predetermined drive voltage is applied;
• a stator which is vibrated by the ultrasonic vibration of the piezoelectric element;
• a rotor which is arranged between the stator and the rotary operation device so as to touch the stator and rotates by a progressive wave transmitted from the stator, wherein
• the rotor is in contact with the rotary operation device so that a center of the rotor agrees with a center of the rotary operation device.