<p>A motor (43) has a swivel hinge (45) preventing the damage of a deceleration gear and a rotor of the motor. A display rotation apparatus comprises a stand (31), a swivel hinge (45) having one end fixed to the stand (31) and configured to rotate relatively when a predetermined amount of torque is applied. A motor (43) is joined to the other end of the swivel hinge (45) by a shaft and has a deceleration gear. A guide (39) is configured to rotate as a single body with the motor (43) and is joined to a display. The restrictive torque of the swivel hinge (45) is smaller than the constraint force of the deceleration gear and greater than the weight of the display.
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