Self-locking module device

A self-locking module device, comprising:

• a box body comprising a bottom board, a top board, and two lateral boards, wherein the bottom board, the top board, and the two lateral boards surround to form a module space and an opening communicating with the module space;
• at least one of the two lateral boards has at least one locking hole;
• a module base comprising a cover body and a bottom frame, wherein the cover body is connected to the bottom frame;
• when the module base is combined with the box body, the cover body is stuck at the opening and the bottom frame abuts against the bottom board;
• the cover body has a cover board, wherein the cover board closes the opening;
• a side of the cover board facing the module space is defined as an inner side, and the other side of the cover board away from the module space is defined as an outer side;
• the cover board has a penetrated portion;
• and
• a rotary driving structure disposed on the cover body and comprising a rotary plate, a rotary handle, at least one latch, and at least one spring, wherein the rotary plate has a rotation center portion;
• at least one pin is combined with a periphery of the rotation center portion of the rotary plate;
• the rotary plate is disposed on the inner side of the cover board and the rotation center portion of the rotary plate is rotatably disposed on the penetrated portion;
• a part of the rotary handle penetrates through the penetrated portion and is combined with the rotary plate;
• at least one track device is formed between the at least one latch and the cover board and the at least one latch is movable in a straight line;
• an outer end portion of the at least one latch has at least one tongue, wherein the at least one tongue protrudes out of a periphery of the cover board and is inserted into the at least one locking hole;
• an inner end portion of the at least one latch comprises a displacement hole;
• the at least one pin penetrates through the displacement hole of the at least one latch;
• the displacement hole has a first end and a second end, wherein the at least one pin is located at the first end;
• a distance between the first end and a center of the rotation center portion is a first length;
• a distance between the second end and the center of the rotation center portion is a second length;
• the second length is greater than the first length;
• the at least one spring is adapted to drive the at least one pin to move towards the first end of the displacement hole of the at least one latch;
• when the module base is about to be combined with the box body, the at least one tongue abuts against at least one of the two lateral boards and moves inward, and at least one of the two lateral boards transmits a force to the at least one latch for moving inward through the at least one tongue;
• when the at least one tongue is aligned with the at least one locking hole, the at least one spring drives the at least one latch to move outward through the at least one pin, so that the at least one tongue is inserted into the at least one locking hole.