Earbud Charging Case With UV-C Sterilization and Power Control

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Solution Overview

Problem

Wireless earbuds are frequently touched and shared, leading to the potential spread of microorganisms, including pathogenic fungi, which can cause ear infections, and existing charging cases do not effectively address hygiene and sterilization needs.

Innovation Solution

A charging case with integrated UV LEDs that generate UV-C radiation to sterilize the earbuds during charging, featuring a control unit to manage power distribution between charging and sterilization, and a reflective coating to enhance sterilization efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If charging case integrates UV LEDs for sterilization, then hygiene and sterilization effectiveness is improved, but device complexity and manufacturing cost increase

Engineering Contradiction:

Improvesterilization effectivenessVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines charging and sterilization functions into a single integrated charging case. The UV LEDs are integrated within the case structure, allowing simultaneous or sequential charging and sterilization operations without requiring separate devices. This merging approach addresses the contradiction by consolidating multiple functions into one device while managing complexity through unified design.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The charging case is designed to perform multiple functions: charging earbuds and sterilizing them. The control unit manages power distribution to enable both charging mode and sterilization mode, making the device universal and adaptable to different operational requirements. This multi-functionality resolves the contradiction by providing enhanced reliability through sterilization while maintaining a single integrated device structure.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If charging case integrates UV LEDs for sterilization, then hygiene and sterilization effectiveness is improved, but manufacturing cost increases

Engineering Contradiction:

Improvesterilization effectivenessVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent employs UV LEDs which are relatively inexpensive components with sufficient operational lifespan for the intended application. By using cost-effective UV LED technology rather than more expensive sterilization methods, the manufacturing cost is kept manageable while still achieving effective sterilization. This approach addresses the contradiction by providing reliable sterilization functionality at an acceptable manufacturing cost.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The charging case performs sterilization automatically without requiring external intervention or additional expensive components. The control unit autonomously manages the sterilization process, activating UV LEDs when earbuds are placed in the case. This self-service capability reduces the need for complex external sterilization equipment, thereby controlling manufacturing costs while maintaining effective sterilization.

Inventive Principle:

Principle #25Self-service

3Reliability

If charging case prioritizes sterilization over charging, then hygiene is improved, but charging time and energy availability worsen

Engineering Contradiction:

ImprovehygieneVSAvoidcharging time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The control unit dynamically adjusts power distribution between charging and sterilization functions based on real-time conditions. It can switch between prioritizing charging, prioritizing sterilization, or operating both simultaneously depending on battery status, user needs, and operational context. This dynamic adaptability resolves the contradiction by allowing the system to optimize for hygiene when needed while ensuring charging requirements are met at other times.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The sterilization function operates periodically rather than continuously, with the control unit scheduling sterilization cycles at appropriate intervals. This periodic operation allows charging to proceed during non-sterilization periods, ensuring that energy availability and charging time requirements are maintained while still providing regular hygiene maintenance. The periodic action balances the competing demands of sterilization effectiveness and charging efficiency.

Inventive Principle:

Principle #19Periodic action

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

Effectively reduces microbial load by 99.9% and ensures both charging and sterilization are efficiently managed, promoting hygiene and health while maintaining a compact, portable, and economical design.

Implementation Method 1

UV LEDs for generating ultraviolet radiations in the far UV-C region to irradiating the inner volume of the charging case

Methodology Applied

Scientific EffectUV-C radiation: Radiation

Implementation Method 2

The inner surface of the charging case can have a reflective coating to enhance the sterilizing efficiency of the UV radiations

Methodology Applied

Scientific EffectReflection: Reflection

Data Source

PatentUS12538060B2Charging case for earbuds

Publication Date: 2026.01.27 ASTRA IP HOLDINGS LLC

AI summary

A charging case having one or more charging docks for charging one or more earbuds. The charging case can further have UV LEDs for automatically sterilizing the earbuds while charging.