Hook shielding device

The hook shielding device comprises an upper shell and a lower shell which are hinged to each other, and a tail torsional spring is arranged at the rotating joint of the upper shell and the lower shell so that the upper shell and the lower shell can tend to bounce off. A containing cavity is formed between the upper shell and the lower shell, the button penetrates out of the containing cavity through the button hole of the upper shell, a pressure device is embedded in the containing cavity, and the button abuts against the pressure device. The pressure device is connected with one end of a pull rod, and a pawl is arranged at the other end of the pull rod and can be buckled on a pull rod pin of the lower shell. When the pressure device senses external water pressure through the button, thepressure device compresses downwards, the pull rod rotates, the pawl is not buckled on the pull rod pin, and due to the arrangement of the tail torsional spring, the upper shell and the lower shell can be bounced off. And the