Waterproof protective case of mobile terminal for diving

A waterproof protective case of a mobile terminal for diving, comprising:

• a housing, and
• a touch portion;
• wherein the housing defines an accommodating cavity therein;
• the accommodating cavity is configured to accommodate the mobile terminal;
• and a fixing opening is defined on a first sidewall of the accommodating cavity;
• the fixing opening is configured to communicate with an outside;
• wherein the touch portion is disposed on the fixing opening;
• the touch portion comprises a flexible bag and a transparent medium liquid;
• a liquid carrying cavity configured to store the transparent medium liquid is defined in the flexible bag;
• a first surface of the flexible bag faces the outside;
• a second surface of the flexible bag abuts against a display screen of the mobile terminal;
• wherein the housing further comprises a pressing frame fixed to the housing through a glue or screws so as to press the flexible bag at the fixing opening;
• wherein the waterproof protective case further comprises a flip cover;
• the housing further defines an accommodating opening in communication with the accommodating cavity;
• wherein the flip cover is rotatably connected with the housing to close or open the accommodating opening;
• wherein the mobile terminal is allowed to be accommodated in or taken out of the accommodating cavity through the accommodating opening;
• wherein the waterproof protective case further comprises at least one locking piece;
• wherein at least one clamping hole is defined at the accommodating opening of housing;
• wherein there is defined a sliding groove in the flip cover;
• wherein each of the at least one locking piece comprises a clamping block;
• each clamping block is slidably mounted in the sliding groove and is slidable in and out of the sliding groove;
• wherein when the flip cover is rotated to close the accommodating opening, each clamping block slides out of the sliding groove and is clamped in a corresponding clamping hole to lock the flip cover.