Adjustable Hearing Aid Earphone Sound Cavity Segmentation
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Solution Overview
Problem
Existing medical hearing-aid earphones have a predetermined overall size and structure, making it difficult to adjust the space sizes of the front and rear sound cavities, limiting their application range and inability to meet individual user requirements.
Innovation Solution
A medical hearing-aid earphone design that includes a housing with an adjustable speaker assembly and holder, allowing for customization of the sound cavities by adjusting the relative position and structure of the holder, enabling arbitrary adjustment of the front and rear sound cavity sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the overall size and structure of the earphone are predetermined, then the manufacturing process is simplified, but the sound cavity sizes cannot be adjusted for different users
Solution Approach 1:
The holder is divided into a first part and a second part that can be relatively moved with respect to each other. The first part includes a first through hole for receiving the speaker assembly, while the second part includes a second through hole that forms the front sound cavity. This segmentation allows independent adjustment of each part's position to customize the sound cavity sizes without redesigning the entire device.
Solution Approach 2:
The holder's first part and second part are designed to be movable relative to each other along the axial direction, transforming the static structure into a dynamic one. This enables the sound cavity volumes to be adjusted according to different user requirements while maintaining a relatively simple overall structure.
2Adaptability or versatility
If the front sound cavity and rear sound cavity are separated by a fixed speaker assembly, then the device structure is stable, but the space sizes of the sound cavities cannot be customized
Solution Approach 1:
The holder is segmented into movable first and second parts that can be independently positioned. The first part receives the speaker assembly while the second part forms the front sound cavity, allowing the space sizes of both cavities to be customized by adjusting the relative positions of these segmented parts during assembly.
3Adaptability or versatility
If the holder structure is simplified, then the manufacturing cost is reduced, but the ability to adjust sound cavity sizes is limited
Solution Approach 1:
The holder is divided into a first part and a second part that can be relatively moved. The first part includes a first through hole for the speaker assembly, and the second part includes a second through hole forming the front sound cavity. This segmentation enables adjustment of sound cavity sizes while keeping each individual part's structure relatively simple and easy to manufacture.
Solution Approach 2:
The movable holder structure serves multiple functions: it supports the speaker assembly, forms the front sound cavity, and enables customization of both front and rear sound cavity sizes. This multi-functionality is achieved through a relatively simple movable structure that reduces the need for additional complex components.
Data Source
AI summary
A medical hearing-aid earphone includes a housing, and a battery assembly and a circuit board assembly located in the housing, where the housing is internally provided with a sound cavity, and the medical hearing-aid earphone further includes a speaker assembly located in the housing and a holder sleeved outside the speaker assembly. The holder and the speaker assembly divide the sound cavity into a front sound cavity and a rear sound cavity, where a relative position of the speaker assembly in the holder is adjustable during assembling. The medical hearing-aid earphone is convenient to adjust space sizes of a front sound cavity and a rear sound cavity, so that the medical hearing-aid earphone can be customized according to requirements of different users and has a larger application range.