In terms of structural design, modern inflatable bouncy castles generally adopt a modular assembly process. Multiple PVC components are connected using high-frequency heat sealing or sewing techniques to form a closed air chamber structure. Key connections are reinforced with double reinforcement, such as adding reinforcing patches at the junction of the uprights and the jumping surface to prevent delamination after long-term use. The inflation port design includes a one-way valve and a safety lock to ensure that air does not flow back during inflation and to prevent accidental deflation by children. Some products also come with an emergency deflation valve, which can be manually opened to accelerate the deflation process when quick storage is needed.
Safety is the core consideration for inflatable bouncy castles. Legitimate products must pass the GB 6675 series of national standards for toy safety, which focuses on testing the content of harmful substances in materials (such as lead and phthalates), structural stability (load-bearing capacity), and edge sharpness. For example, the jumping surface must be able to withstand a static pressure of at least 100 kg/m², and the upright structure must pass 5000 fatigue cycles. In addition, a protective fence of more than 1.2 meters will be installed around the equipment. The top of the fence is designed with an arc to avoid scratches, and the bottom is widened to enhance its resistance to tipping over. Some products will also be equipped with a safety net to form a secondary protective layer between the fence and the ground.
