| 摘要 |
A ceiling built-in type project lift apparatus can control a project to accurately scan a screen installed in front of it. On the bottom of the inside of a project apparatus case(2), the back end of a project built-in frame(10) is installed with a shaft(4). On an upper tilt plate(11) of the project built-in frame, a project tilting device(50) adjusting the angle of a project apparatus is mounted. On the top of the inside of the project system case, a tubular motor(30) is installed to be inclined with a pair of eccentric bearing bracket(32). On the tip end of a shaft(33) of the tubular motor, a winding drum in which a winding groove(34) is formed in screw type is mounted. In the winding drum, the wire is wound with one end fixed. On the center of the leading end of the upper tilt plate of the project built-in frame, a sliding device which slides back and forth along a guide unit as the wire is wound or unwound in the winding drum is mounted. The bottom of the wire wound in the winding drum is connected to the sliding device. The wire is wound with the forward reverse operation of the tubular motor in the wire winding drum or the wire becomes milder. The project built-in frame with the projecting apparatus is extracted or stored through the bottom of the project apparatus case. |
