| 摘要 |
A rotary device includes a fastening seat and a fastening block. The fastening seat is provided with a receiving slot for receiving a spine-locking rod or screw. The receiving slot is provided on the inner wall with two retaining recesses. The fastening block is provided with a retaining flange and an arcuate press surface. The fastening block is disposed in the receiving slot of the fastening seat. As the fastening block is so turned that the retaining flange of the fastening block is fitted into the retaining recesses of the fastening seat, the spine-locking rod or screw is pressed against by the arcuate press surface of the fastening block.
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