| 摘要 |
PROBLEM TO BE SOLVED: To prevent wrong connection securely due to an error of polarity, to secure excellent workability, and to control the connection order by the polarity. SOLUTION: A movable cover 35 which is provided movable between each of post protective covers 30, 31 is moved towards the post protective cover 31 shown in a figure, then an opening for a terminal 33 and an opening for operation 34 of the terminal for the post protective cover 31 are closed separately on the portion shown in the right half part of the figure of the side surface part 37 and on the top surface part 36 of, and an opening for the terminal 32 and an opening for operation 34 of the post protective cover 30 are not closed by the movable cover 35. Furthermore, when the movable cover 35 is moved towards the post protective cover 30, the opening for operation 34 of the post protective cover 30 is closed on the portion shown in the left half part of the figure of the top surface part 36 of, and the opening for the terminal 33 and the opening for operation 34 of the post protective cover 31 being opened by the movable cover 35.
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