Shutter

The utility model relates to a shutter, including protection box upper cover and protection box lower cover, protection box upper cover is covered down with the protection box and is provided with corresponding jack, lean on below position placed in the middle to be provided with tripolar shutter in the protection box lower cover, tripolar shutter upper end is provided with a pair of second spliced pole, tripolar shutter top is provided with the two poles of the earth double -purpose shutter, and the two poles of the earth double -purpose shutter lower extreme is provided with a pair of first spliced pole, first spliced pole and second spliced pole pass through spring coupling, become whole through protection box cover connection above the protection box lower cover, the jack divide into the two poles of the earth jack and tripolar jack. The utility model discloses a two poles of the earth jack and tripolar jack are protected by independent shutter respectively, and be relatively independent when using, the mutually noninterfere, the user can be by selecting required jack certainly, avoid traditional shutter because of the drive of E utmost point jack will five little holes whole the opening of all jacks, safe and reliable more when letting the user use, the LN bolt by the plug when opening shutter drives simultaneously, can open, more scientific, the hommization of the mode of opening, the security is better.