The utility model discloses a high-sealing anti-leakage BOX sound cavity. The
loudspeaker comprises a first shell and a second shell which are buckled with each other, a
loudspeaker assembly is fixedly arranged between the first shell and the second shell, the
loudspeaker assembly comprises magnetic steel and a base frame, the second shell is provided with a hollow part used for exposing the magnetic steel, the periphery of the hollow part extends towards the base frame and is provided with a first rib, and the first rib is provided with a
second rib. The base frame is correspondingly provided with a
second rib, and the first rib and the
second rib are fused and jointed, so that the
joint surface between the base frame and the second shell has no gap; the base frame and the second shell are welded through ultrasonic
waves; the first rib is arranged on the second shell, the second rib is correspondingly arranged on the base frame, the first rib and the second rib are connected in a fusion mode, so that no gap exists on the joint face between the base frame and the second shell, the base frame and the second shell are welded through ultrasonic wave, ultrasonic wave energy is used for
welding in the ultrasonic wave
welding process, and additives such as glue do not need to be used.