Tablet computer protective case device

A tablet computer protective case device, used for accommodating a tablet computer, wherein the tablet computer comprises a tablet female connector, the tablet computer protective case device comprising:

• a protective case body, comprising:
• a main plane plate;
• a side wall plate, connected to the main plane plate around, wherein the side wall plate comprises a male connector and a gap, the male connector is used for connecting to the tablet female connector, the gap is located next to the male connector, allowing the side wall plate to form a connection strip;
• a conductive connecting wire, used for connecting to the male connector;
• and
• an accommodation space, formed by the main plane plate and the side wall plate, to accommodate the tablet computer;
• wherein one opening end of the connection strip is connected to the male connector, allowing the male connector to be inserted into the tablet female connector or for the male connector to be separated from the tablet female connector through the connection strip.