In-Ear Headset Microphone Stability via Counterweight Hook
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Solution Overview
Problem
In-ear-canal headsets with integrated microphones face stability issues due to the added weight and rotating torque caused by the microphone unit, making them difficult to wear comfortably.
Innovation Solution
The design incorporates a lightweight microphone unit with a plate-shaped arm and wavelike connecting cord, along with a fixing unit featuring a ring and hooking portion that rests on the auricle, enhancing stability and reducing weight by using a flexible plastic material and through holes for the cord, which also reduces thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a microphone unit is added to an in-ear earphone to create a headset, then the headset functionality is improved, but the total weight is increased
Solution Approach 1:
The patent combines the microphone unit with the in-ear earphone into an integrated headset assembly. The microphone unit is positioned adjacent to the earphone body, and both components share common structural elements and mounting mechanisms, merging two separate functional units into a unified device that provides both audio playback and voice capture capabilities
Solution Approach 2:
The headset assembly is designed to perform multiple functions: the earphone component provides audio output while the integrated microphone unit enables voice recording and communication. This multi-functional design allows a single device to replace what would traditionally require separate earphones and microphone, improving versatility without proportionally increasing weight
2Adaptability or versatility
If the microphone unit is extended from the ear toward the mouth, then the headset functionality is improved, but a rotating torque is created that affects wearing stability
Solution Approach 1:
The patent introduces a fixing unit with a hooking portion that extends from the earphone body toward the user's auricle (outer ear). This hooking portion acts as a counterbalancing element that opposes the rotating torque generated by the microphone extension, providing a counteracting force that stabilizes the headset's position during wear
Solution Approach 2:
The fixing unit is constructed from elastic material that provides both structural support and flexibility. This composite approach combines the rigidity needed to counteract torque with the elasticity required for comfortable contact with the auricle, creating a stabilizing mechanism that adapts to different ear shapes while maintaining wearing stability
3Device complexity
If only a rubber tip is used to fix the in-ear earphone at the entrance of the ear canal, then the structure remains simple, but the wearing stability is insufficient
Solution Approach 1:
The fixing mechanism is divided into distinct functional segments: the rubber tip that seals the ear canal entrance, the wave-guiding tube that directs sound, and the hooking portion that anchors the device to the auricle. This segmentation allows each component to perform its specific function while collectively providing enhanced wearing stability compared to a single rubber tip
4Weight of moving object
If the connecting cord is arranged in a wavelike pattern through holes in the plate-shaped arm, then the weight and thickness are reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The plate-shaped arm contains multiple through holes that serve as routing channels for the connecting cord. This porous structure allows the cord to pass through the arm in a controlled wavelike pattern, reducing the amount of material needed and thereby decreasing both weight and thickness while maintaining structural integrity
Data Source
AI summary
An in-ear-canal headset assembly includes an accommodating housing, a speaker unit, a fixing unit, an in-ear unit and a microphone unit. The accommodating housing has a resonance chamber, a sound chamber in air communication with the resonance chamber, and an outer cover covering the resonance chamber. The resonance chamber receives a socket therein. The speaker unit is received in the sound chamber. The fixing unit has a ring portion disposed around the sound chamber and a hooking portion connected to the ring portion. The in-ear unit has a covering lid covering the sound chamber, a wave-guiding tube extending from the covering lid, and a flexible tip fixed on the wave-guiding tube. The microphone unit has an arm, an earphone plug, a microphone disposed on an end of the arm, and a connecting cord arranged on the arm for electrically connecting the earphone plug to the microphone.