| 摘要 |
PURPOSE:To facilitate a setting operation selecting the radiating direction of the sound of a speaker by a viewer by driving a motor with a control device and changing the second speaker to the desired direction when the radiating direction of the sound of the second speaker related to the first speaker is changed in order to increase the acoustic effect and when the speaker arrives at the designated rotational position, stopping the rotation of the motor. CONSTITUTION:By inputting a direction changing command to a controller 30, the motor is conducted, and for example, when rotation is started in the clock-wise direction, the rotational force is transmitted through a gear 11, a gear 12 and a rotary shaft 13 to an upper part cabinet 1. Thus, the upper part cabinet 1 is rotated in the clockwise direction and the direction of the radiating surface of the sound of a speaker 3 is changed. The rotation of the gear 11 is detected by a sensor 20, and the output signal is guided to the controller 30. The controller 30, when the pulse of the output signal of the sensor 20 arrives at the number corresponding to the direction of the upper part cabinet 1, stops the rotation of the motor 10.
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