Car alarm siren has molded cover and piezo disc held by O-ring between front and rear resonator housings ultrasonically welded inside a front housing

摘要

The car alarm siren has a piezo disc held by an O-ring between front and rear resonator housings ultrasonically welded inside a front housing with three pegs ultrasonically welded to a curved sound coupling cap and with hooks for spray proof seal a molded body (1) for control electronics and battery.