| 摘要 |
PROBLEM TO BE SOLVED: To eliminate a risk of a fire due to a short circuit caused by a state that dust gathering in a receptacle such as a table tap plug socket (an extension cord) absorbs water. SOLUTION: A single swinging lid 2 is attached to each receptacle of the plug socket 1 to prevent dust etc. from entering when the plug socket is not used. The single swinging lid is provided with a spring 5 so that the lid is always closed when the plug socket is not used. COPYRIGHT: (C)2005,JPO&NCIPI
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