Bone Conduction Earpiece Suspension with Damping Layer
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Solution Overview
Problem
Bone conduction headphones suffer from frequent feedback issues, leading to unpleasant whistling and increased power consumption, and are prone to reduced service life due to external influences like moisture and dirt.
Innovation Solution
A device featuring a plate-shaped bearing spring with a resilient core and a damping layer, which is connected to a capsule element to reduce feedback by minimizing structure-borne noise and sound radiation, while also being designed to be insensitive to external influences through sealing and durable materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the bone conduction phone is directly connected to the housing, then the structure is simple, but feedback occurs due to structure-borne noise transmission
Solution Approach 1:
The patent introduces a bearing spring as an intermediary element between the bone conduction phone and the housing. This spring acts as a mechanical mediator that decouples the direct connection, preventing structure-borne noise from being transmitted to the housing while still providing stable mounting. The spring element serves as the mediator that breaks the feedback path without requiring complex active control systems.
Solution Approach 2:
The mounting structure is segmented into multiple independent components: the bearing spring with inner and outer spring elements, the capsule housing, and the bone conduction phone assembly. This segmentation allows each component to perform its specific function independently - the spring provides vibration isolation while the housing provides structural support, resolving the feedback issue without compromising structural integrity.
2Object-generated harmful factors
If the microphone is decoupled from the housing, then feedback is reduced, but the mounting becomes very complex
Solution Approach 1:
The bearing spring serves multiple functions simultaneously: it provides mechanical mounting for the bone conduction phone, acts as a vibration isolator to prevent feedback, and allows for positional adjustment. This multi-functionality eliminates the need for separate decoupling mechanisms, achieving feedback reduction without increasing overall device complexity.
3Object-generated harmful factors
If damping material is added to reduce vibrations, then feedback is reduced, but the manufacturing complexity increases
Solution Approach 1:
The bearing spring is constructed as a composite structure with an inner spring element and an outer spring element made of different materials or with different geometric properties. This composite design allows optimization of vibration damping characteristics while maintaining manufacturability through standard spring fabrication processes, avoiding the need for complex multi-material assembly.
4Reliability
If the bone conduction phone is sealed to protect against moisture and dirt, then service life is extended, but the mounting flexibility is reduced
Solution Approach 1:
The bearing spring acts as a mediator that allows the sealed bone conduction phone assembly to be mounted flexibly without compromising the seal. The spring's elastic properties enable positional adjustment and accommodation of manufacturing tolerances while the sealed capsule maintains its protective enclosure, resolving the contradiction between sealing integrity and mounting flexibility.
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
Significantly reduces feedback occurrences and extends the service life of bone conduction headphones by decoupling vibrations and protecting against environmental factors, ensuring effective sound transmission and mechanical resilience.
Implementation Method 1
the bearing spring having a resilient core comprises a surface of the plate-shaped bearing spring facing away from the volume, preferably the resilient core, at least in sections having a damping layer
Implementation Method 2
the bearing spring having a resilient core comprises a surface of the plate-shaped bearing spring facing away from the volume
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to a device (1) for mounting a bone conduction earphone (2) comprising a plate-shaped bearing spring (3) connectable to the bone conduction earphone (2) and a capsule element (4) which has a suspension section (6) and surrounds a volume (5) for receiving the bone conduction earphone (2), wherein the plate-shaped bearing spring (3) is connected to the suspension section (6). To reduce the occurrence of feedback, the bearing spring (3) comprises a resilient core (7), wherein a surface of the plate-shaped bearing spring (3), preferably of the resilient core (7), facing away from the volume (5), has at least a partial damping layer (8).