| 摘要 |
PROBLEM TO BE SOLVED: To inhibit adhesion of dusts or the like which cause fire-hazards at a connecting part of a plug and receptacle, and prepare so that the plug is hard to come off from the receptacle at the state that the plug and receptacle are closely joined. SOLUTION: 1, An edge to play a role of dust prevention and having a shape to stick out or to protrude is installed at the plug. 2, The receptacle is made to be equipped with the dust prevention edge which has been installed at the plug and which has a shape capable of plugged in. 3, The receptacle is made to be equipped with the dust prevention edge which has been installed at the plug and which has been made to have either a male or a female shape. 4, The receptacle is made to be equipped with the dust prevention edge which has been installed at the plug so that a part of plug is made to have either a male or a female shape. 5, A face which becomes the face of plug-in direction of the receptacle is made to have a shape installed by a magic tape (registered trademark). 6, A connecting part of receptacle cover and the plug is made to have a shape installed by the magic tape. 7, At the vicinity of the upper part of plug-in port of receptacle cover, a covering (10) to play a dustproof role is installed.
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