Positioning structure for light-guiding plate and back frame, backlight module and liquid crystal display device thereof

A liquid crystal display device, which comprises a backlight module, a display screen and an outer frame, the backlight module further comprising a mold frame, at least an optical film, and a positioning structure for light-guiding plate (LGP) and back frame;

• the optical film being disposed on the LGP and being fixed by the mold frame, the display screen being disposed on the mold frame and being fixed by the outer frame;
• wherein in the positioning structure for the LGP and the back frame, the LGP being disposed inside the back frame, and a first side inner wall of the back frame being disposed with a plurality of LEDs, a second side inner wall adjacent to the first side inner wall being disposed with at least a first magnetic body, a side of the LGP corresponding to the second side inner wall being disposed with an attachment body corresponding to the first magnetic body;
• the first magnetic body and the attachment body being correspondingly attached, a third side inner wall of the back frame opposite to the second side inner wall being disposed with at least a buffer plate, a fourth side inner wall of the back frame opposite to the first side inner wall being disposed with at least a second magnetic body, a side of the LGP corresponding to the fourth side inner wall being disposed with an attachment body corresponding to the second magnetic body;
• the second magnetic body and the attachment body being correspondingly attached.