| 摘要 |
PURPOSE: To prevent damage to a main body side when excessive globe screwing force is acted even using a hooking ceiling type and closed globe. CONSTITUTION: In this constitution, constant resistance is given to the rotation force of an adaptor 25 in a glove screwing direction, by an elastic contact piece 30 and a regular octagon clutch/surface 29, between the adaptor 25, wherein a globe 26 is screwed, and a ceiling socket 11. |
