This invention describes the internal motor system for an automatic shoelace tightener. It uses a small motor connected to a gearbox, which then drives a special screw-like 'worm drive'. This worm drive slides onto a shaft from the gearbox and turns a gear that winds up the shoelace spool, tightening the shoe. The claims specifically detail how the worm drive connects and how the lace spool is designed.
Why it matters: The core mechanical components described have not seen significant technological shifts since 2019. The primary challenges of integrating a durable, lightweight, and long-lasting power source into footwear for such a mechanism likely persist.
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