Front-mounted rear-inserted arc light protection device

The utility model relates to a front-arranged rear-inserted arc light protection device, which comprises an outer shell, a total circuit board arranged on the front side surface of the outer shell, a plurality of functional circuit boards arranged in the outer shell, a plurality of sockets arranged side by side on the total circuit board, a pin arranged at the front end of each functional circuit board, and a plurality of pins arranged on the front end of each functional circuit board. The functional circuit boards are respectively in one-to-one correspondence with the sockets on the main circuit board, and are sequentially inserted into the corresponding sockets on the main circuit board through the contact pins on the front end surfaces of the functional circuit boards; a front panel assembly is arranged in front of the total circuit board and comprises a liquid crystal display panel, a metal cover plate and a front panel, the front panel is attached to the front surface of the metal cover plate, the liquid