| 摘要 |
A ceiling installation lift for a multimedia projector may be installed in a ceiling cavity. Said ceiling installation lift is provided with a base plate (2) in the shape of a frame that can be attached to a raw ceiling and a platform (5) that may be lowered from a non-use position to a use position. Synchronized lifting spindles (3) that may be driven in both rotational directions are provided for lowering and raising the platform (5), said lift spindles being in operative connection with spindle nuts (4). The lifting spindles (3) and spindle nuts (4) are provided with a round thread, said spindle nuts (4) being nylon threaded nuts (4). |
