This utility model relates to a cavity-based anti-leakage structure for a
loudspeaker cable passage, comprising a
loudspeaker driver, a panel, and a rear shell. The
loudspeaker driver is disposed inside the panel. The panel also has a cavity, through which the connecting wire of the loudspeaker driver passes. A circular hole is provided on the rear shell corresponding to the cavity. The rear shell and panel are ultrasonically sealed after the circular hole aligns with the cavity, and the circular hole contains sealing
adhesive. This utility model uses
ultrasonic welding to completely eliminate the risk of air leakage at the
joint surface of the partition; external
adhesive injection directly seals the wire perforation, eliminating the air leakage channel; and the
adhesive injection location is exposed, allowing direct
visual inspection of the adhesive filling state, avoiding hidden defects; at the same time, precise external adhesive injection significantly reduces the amount of adhesive used, eliminating the internal adhesive application process and simplifying the
assembly process; thus significantly improving the airtightness of the cavity, ensuring that low-
frequency response and
distortion control meet
acoustic design requirements.