| 摘要 |
A speaker orientation angle control apparatus is provided to control an orientation angle of a speaker installed on a ceiling of a building. A top frame(20) is combined with a top roller(30). A bottom frame(60) is fixed with a speaker, and is combined to one side of the top frame by a hinge block(80), and performs angular movement around the hinge block by installing a bottom roller(70) on the other side. A first actuator(40) generates the rotation force by being combined to the top frame. A disc(50) is supported by the top frame, and is rotated by the first actuator. A wire(12) is fixed to the bottom roller, and is fixed to the disc through the top roller. Up and down orientation angle of the speaker is controlled by angular movement of the bottom frame, by pulling and releasing the wire by the rotation force of the first actuator. |
