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1. An optical fiber connector box, comprising a box body (1), an end cover assembly (3), and a hoop assembly (4), wherein an internal assembly (2) connected to the end cover assembly (3) is disposed in the box body (1), the internal assembly (2) comprises an adapter metal bracket (2-1), an expanded optical fiber disc fixed bracket (2-4) and a permanent fiber storage disc (2-3) are connected to the adapter metal bracket (2-1), and the permanent fiber storage disc (2-3) is provided with a plurality of expanded optical fiber discs (2-7), wherein kidney-shaped holes (2-4-3) are formed in two sides of the expanded optical fiber disc fixed bracket (2-4), each expanded optical fiber disc (2-7) is connected to the kidney-shaped hole (2-4-3) through a disc chaining hinge (2-6), the expanded optical fiber disc (2-7) can displace along a straight line of the kidney-shaped hole (2-4-3), the expanded optical fiber disc (2-7) can rotate around the disc chaining hinge (2-6), a through hole extending along a central axis of the box body (1) is form in the middle of the expanded optical fiber disc fixed bracket (2-4), protruding structures (2-4-1) and in-groove notch structures (2-4-2) are respectively arranged on two inner side walls of the through hole in a mirror image array manner, the protruding structures (2-4-1) and notch structures (2-4-2) on the two inner side walls are arranged in one-to-one correspondence, a quick-release supporting member (2-8) can be inserted to the through hole, and the expanded optical fiber disc (2-7) located on an upper layer of the quick-release supporting member (2-8) is supported by the quick-release supporting member (2-8) to rotate by a certain angle.
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