Equipment using mounting hole of ceiling as fixing element and accessory devices

摘要

Equipment using a mounting hole of a ceiling as a fixing element and its accessory devices, in which a feeding port-carrying electric connecting means capable of being connected by a simple operation, and a mechanical locking means capable of detachably fixing even a heavy appliance and an elongated appliance to a mounting hole are provided, and in which these appliances can be connected to the mounting hole electrically and mechanically at the same time, the appliances utilizing the rear side (space under the ceiling) of the mounting hole as a storage space for a lighting circuite member, whereby the appliances are designed unitarily to improve their dimensions reducing effect and their designing effect and enable the appliances to be changed and moved with respect to the mounting hole.