Magnetic Earbud Charging Adapter for In-Ear Playback
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Solution Overview
Problem
Wireless earbuds have limited playtime due to size and weight constraints, and existing charging solutions like charging cases or quick charging disrupt playback or are cumbersome.
Innovation Solution
A charging adapter with attachable batteries and a charging case that allows earbuds to be charged while in use through a magnetic interface, enabling three modes: normal playback, active charging, and passive charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If wireless earbuds use small batteries to meet size and weight constraints, then portability and comfort are improved, but playtime duration is reduced
Solution Approach 1:
A charging adapter serves as an intermediary device that attaches to the earbud and provides additional battery capacity. The adapter includes a battery that can charge the earbud's internal battery during playback, effectively extending playtime without increasing the earbud's base weight and size.
Solution Approach 2:
The charging adapter performs preliminary charging action by attaching to the earbud before the internal battery is depleted. The adapter's battery is pre-charged and can immediately begin charging the earbud when attached, ensuring continuous playback without interruption.
2Duration of action of moving object
If a charging case is used to recharge earbuds, then battery capacity is extended, but usability is disrupted and operation becomes cumbersome
Solution Approach 1:
The charging adapter transitions from a static charging case model to a dynamic, attachable solution. The adapter can be attached to the earbud during playback, allowing the system to adapt between playback mode and charging mode without requiring the user to manually switch or access a separate charging case.
Solution Approach 2:
The charging adapter merges the functions of additional battery capacity and charging capability into a single attachable unit. This combines the benefits of extended battery life with the convenience of wireless earbud usage, eliminating the need to choose between charging and listening.
3Loss of time
If quick charging is implemented to reduce charging time, then charging speed is improved, but playback is disrupted and user experience deteriorates
Solution Approach 1:
The charging adapter enables continuous useful action by allowing the earbud to be charged during playback. The magnetic interface enables automatic connection and charging without interrupting the music, maintaining continuous useful action of both playback and charging simultaneously.
4Adaptability or versatility
If a magnetic interface is added to enable attachable charging, then charging flexibility is improved, but device complexity increases
Solution Approach 1:
The magnetic charging interface is extracted as a separate, modular component rather than being integrated into the earbud's core structure. This allows the charging functionality to be added or removed independently, increasing flexibility while minimizing impact on the main device's complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables continuous use of earbuds during charging, maintaining stereo sound and usability without the need for manual switching, and supports efficient battery management.
Implementation Method 1
The magnetic interface includes one or more magnets that (i) attach the charging adapter externally to the housing of the wireless earbud and (ii) align electrodes of the charging adapter with electrodes of the magnetic interface
Data Source
AI summary
Examples described herein relate to a charging system for wireless earbuds involving charging adapters that are attachable to the wireless earbuds. In some implementations, the charging adapter is attachable to an external surface of an earbud using a magnetic or mechanical interface that align electrodes of the charging adapter with electrodes on the wireless headset, allowing an internal battery of the earbud to draw current and charge from the charging adapter while the earbud is in-ear. Then, when the internal battery is and recharged using a charging case or wall charger, the charging adapter can be detached from the earbud.