Metal Earpad Heat Conduction for Thermal Comfort
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Solution Overview
Problem
Users of circumaural and supra-aural headsets and ear defenders experience discomfort due to heat build-up at the interface between the earpad and skin, as the earpad materials, typically foam with insulating properties, prevent heat dissipation, leading to warmth and a desire to remove the headset soon after use.
Innovation Solution
Incorporating metal members as heat conductors on the contact surface of the earpad, which can be resiliently suspended to adapt to the ear, using metal foils or meshes in contact with heat sinks to dissipate heat effectively, and optionally covering with softer materials for comfort, while ensuring the earpad remains liquid-tight and adaptable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If soft earpad material (foam) is used to provide comfort and adaptability, then the earpad adapts well to the ear surface, but heat dissipation is prevented causing heat build-up
Solution Approach 1:
The earpad combines foam material with metal heat conductors to create a composite structure that provides both adaptability and heat dissipation. The foam layer conforms to the ear surface while the metal elements embedded within or attached to the foam conduct heat away from the contact surface, resolving the contradiction between comfort/adaptability and thermal management.
2Ease of operation
If a cover layer of artificial leather or soft plastic is provided on the earpad, then the earpad feels soft and comfortable, but air cooling is prevented
Solution Approach 1:
Instead of making the entire cover layer permeable, the invention applies selective local quality by incorporating metal heat conductors at specific locations on the contact surface. This allows the cover layer to remain soft and comfortable overall while creating localized thermal pathways that conduct heat away from high-contact areas, balancing comfort and heat dissipation.
3Temperature
If metal members are added to the earpad for heat conduction, then heat dissipation is improved, but device complexity increases
Solution Approach 1:
The heat conduction function is segmented into discrete metal elements rather than using a continuous metal structure. These segmented metal conductors can be strategically placed at key heat-generation points on the earpad contact surface, providing effective heat dissipation with minimal material and structural complexity. Each metal segment acts as an independent heat pathway.
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
The solution effectively transfers heat away from the skin, providing a cooling effect and comfort over prolonged use, as metals are superior heat conductors, improving thermal dissipation and reducing discomfort associated with heat build-up.
Implementation Method 1
one or more metal members to transfer heat away from the contact surface. As metal is known as good heat conductor, heat can be transferred away from the skin in an easy way.
Implementation Method 2
The metal foil or metal mesh may be in contact with a heat sink, which dissipates heat into the surrounding air.
Data Source
Figure 1
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AI summary
An earpad (1) to provide an interface between an earcup (4) of a headset (7), a headphone (8) or an ear defender (9). The earpad (1) comprises a contact surface (2) contacting the skin (10) of the ear (11) or ear surroundings of the user. The earpad (1) comprises one or more metal members (3, 6, 12, 13, 33) to transfer heat away from the contact surface (2).