Radian lock for LED display screen

The LED display screen radian lock comprises an upper cover, a base, a radian block, a lock rod, a lock plate and a limiting mechanism, the end, close to the lock plate, of the lock rod is provided with a conical head, the conical head gradually becomes smaller in the direction towards the lock plate, the conical head is provided with an annular clamping groove, and the end, away from the conical head, of the lock rod is provided with a clamping plate; the second display screen box body is provided with a connecting seat, the connecting seat is provided with an installing seat for the lock rod to penetrate through, a spring groove is formed in the side, close to the clamping plate, of the installing seat, the rod portion of the lock rod is sleeved with a second spring, one end of the second spring abuts against the clamping plate, and the other end of the second spring is arranged in the spring groove. The lock rod and the lock plate are matched, after the lock rod is inserted into the position of the groove,