Headphone headband padding degrades and peels over time. Yet, unlike earpads, it is rarely replaceable. This forces users to discard fully functional headphones, contributing to 15 million kg of electronic waste annually. We analysed popular headphones on the market to see why this padding is hard to replace, and redesigned the headband to allow for easy replacability of the padding. We also took design for manufacturing and assembly into account.
The solution uses a snap-on mechanism. The padding is easily guided into the slot on the headband, and clicks into place with two-hand pressure, requiring no tools and no disassembly of any other component. The cushion is printed using TPU 85A for softness and flexibility while the headband frame is printed with PETG for structural integrity. For large scale production, injection molding would be used. Both parts are made from just one material, making manufacturing and assembly easy.
Early prototypes explored a slide-in rail mechanism, but the earmuffs obstructed alignment along the rail, making assembly impractical. Switching to a snap-on approach resolved this by allowing the cushion to press on from above without any guiding rails. Three joining methods (velcro, adhesive, and external clips) were evaluated before the snap-on mechanism was selected as the most secure, durable, and hair-safe option.
Cross-section — Snap Profile Engaged in Frame
The prototype validated the snap mechanism and material choices, but three areas would require further development before a production-ready product could be delivered.
