Headphone Light Guide Module with Sealed Housing
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Solution Overview
Problem
Conventional headphones with light-emitting decoration covers suffer from poor light shielding and visual effects due to inadequate concentration of luminous brightness and loose fitting surfaces, leading to leakage of light rays.
Innovation Solution
The design incorporates an arc-shaped headband with a sliding bar, hanger, and a light emitting unit featuring a light guiding module with a light blocker and reflectors, where light rays are concentrated and refracted to prevent leakage, using a combination of embedded injection molding and double injection molding technologies for improved sealing and light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a luminous decoration cover is added to improve market competitiveness and visual effect, then the headphone gains light-emitting function, but light rays leak through the cover resulting in poor light shielding performance
Solution Approach 1:
A light-blocking layer is introduced as an intermediary between the light-emitting component and the external environment. This layer selectively blocks light rays while allowing the luminous decoration cover to maintain its light-emitting function, thus resolving the contradiction between adding light-emitting capability and preventing light leakage.
Solution Approach 2:
The luminous decoration cover is constructed using composite materials that combine light-emitting properties with light-blocking capabilities. This allows the cover to simultaneously achieve the desired visual effect and prevent light ray leakage, resolving the technical contradiction.
2Ease of manufacture
If the luminous decoration cover is made with plane surfaces for simple manufacturing, then production is easier, but the fit between the cover and headphone body is loose resulting in poor sealing
Solution Approach 1:
The contact surface between the luminous decoration cover and the headphone body is designed with a curved structure instead of a plane surface. This curved contact surface improves the fit and sealing performance between the cover and the body, preventing light leakage while maintaining manufacturability through injection molding technology.
3Illumination intensity
If the luminous brightness is increased to improve visual effect, then the light-emitting function is enhanced, but light rays scatter and fail to concentrate resulting in poor visual effect
Solution Approach 1:
The light-blocking layer is designed with selective local properties, allowing light to pass through in specific directions while blocking it in others. This creates concentrated light emission in desired areas while preventing scattering, thus improving both luminous brightness and light concentration without compromising manufacturing precision.
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 blocks light rays from leaking, enhancing the light-emitting function and providing a better sealing performance, resulting in improved visual effects and market competitiveness for headphones.
Implementation Method 1
light rays are concentrated and refracted to prevent leakage
Implementation Method 2
Light rays from the light emitter are blocked, so the light rays from the light emitter are prevented from leaking
Data Source
AI summary
A headphone includes an arc-shaped headband, a sliding bar slidably arranged at a tail end of the headband, a hanger pivotally arranged at a tail end of the sliding bar, an earphone unit hanged to the hanger, and a light emitting unit. The earphone unit is fastened to the hanger. The earphone unit includes a housing. A peripheral edge of an outer surface of the housing protrudes outward to form a protruding ring. The light emitting unit is fastened to the housing. The light emitting unit includes a light guiding module and a light emitter. The light guiding module includes a light guider and a light blocker. An inner end of the light blocker is provided with a contacting portion which is closely cooperated with the protruding ring, and an inner end of the light guider closely abuts against the protruding ring.