Modular Headphone Control Wheel for External Battery Access

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Solution Overview

Problem

Conventional headphones with integrated batteries are difficult to service or replace, requiring expert intervention and often leading to the entire device being discarded when the battery fails, which is neither practical nor cost-effective.

Innovation Solution

A headphone design featuring a modular control wheel that can be easily detached from the earpiece, allowing external access to the battery for replacement or service, using various attachment mechanisms such as screw and hook, magnets, bayonet-type coupling, or screws, enabling non-destructive access to internal components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If batteries are fully integrated into the headphone design to make it sleek and compact, then the aesthetic appearance and compactness are improved, but the replaceability and ease of service are worsened

Engineering Contradiction:
Improvesleek and compact designVSAvoidbattery replaceability
Core Design Contradiction:
ShapeVSEase of repair

Solution Approach 1:

The control wheel is segmented as a separate modular component that can be detached from the earpiece housing. This segmentation allows the battery to be accessed and replaced independently while maintaining the integrated aesthetic appearance during normal use. The control wheel module acts as an accessible entry point to the internal battery compartment.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The control wheel is extracted as a removable module from the earpiece housing. This extraction creates an accessible interface for users to open the housing and replace the battery without requiring expert service. The control wheel can be removed to expose the battery compartment, enabling easy maintenance while preserving the sleek integrated design when assembled.

Inventive Principle:
Principle #2Taking out (Extraction)

2Ease of repair

If conventional battery access methods are used requiring removal of cushion, front housing, and other components, then the battery can be accessed, but the complexity and time required for service increases significantly

Engineering Contradiction:
Improvebattery accessibilityVSAvoiddisassembly complexity
Core Design Contradiction:
Ease of repairVSDevice complexity

Solution Approach 1:

The control wheel is extracted as a separate removable module, creating a simplified access path to the battery. Users only need to remove the control wheel to access the battery compartment, eliminating the need to disassemble the cushion, front housing, and other components. This extraction principle reduces the disassembly steps from multiple complex removals to a single module detachment.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The control wheel serves as an intermediary access point to the battery compartment. Instead of requiring direct access through multiple disassembled components, the control wheel module acts as a mediator that, when removed, provides direct access to the battery while leaving the rest of the housing intact. This intermediary approach simplifies the service process significantly.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Volume of stationary object

If batteries are integrated into the design, then the overall device compactness is improved, but the battery lifespan and environmental sustainability are worsened due to inability to replace

Engineering Contradiction:
Improvedevice compactnessVSAvoidbattery lifecycle sustainability
Core Design Contradiction:
Volume of stationary objectVSReliability

Solution Approach 1:

The control wheel is segmented as a removable module that provides access to the integrated battery. This segmentation maintains the compact integrated design during normal use while enabling battery replacement when needed. The modular control wheel creates an access pathway without requiring a separate battery compartment, preserving compactness while improving sustainability.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The design enables self-service battery replacement by providing users with direct access to the battery through the removable control wheel. Users can replace the battery themselves without requiring expert service, extending the device lifecycle and reducing waste. This self-service capability transforms the integrated battery from a disposable component into a replaceable one.

Inventive Principle:
Principle #25Self-service

Data Source

PatentUS12477264B2Headphone earpiece with modular control wheel
Publication Date: 2025.11.18 BANG & OLUFSEN AS
  • US12477264B2 patent drawing
  • US12477264B2 patent drawing
  • US12477264B2 patent drawing

AI summary

The present disclosure relates to a headphone with noise-cancelling capabilities. More specifically, the present disclosure relates to replaceable and serviceable headphone batteries, without extensive dismantling or replacement of the headphone. The headphone may have a volume wheel that is located on the back of the ear-piece. The volume when may be turned clock-wise or counter clock-wise to increase, or decrease the volume, respectively. In contact with the volume wheel, the battery pack may be placed in a pocket or opening within the earpiece. The volume wheel may be a modular, standalone component, so that once removed from the ear-piece, the battery pack may be replaced from the external, rather than requiring removal of several components to reach the battery pack located internally.