Earphone Ear-Hanger Pivot Alignment for Radial Shaft Stability
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Solution Overview
Problem
The rotating shaft of existing ear-hanging earphones is prone to radial deflection, reducing the user's adjusting hand feeling and comfort.
Innovation Solution
The earphone design incorporates a housing with an accommodating groove and an opening groove, featuring a first hole, an ear hanger with a rotating part and a second hole, and a rotating shaft that interlocks through these holes, along with a positioning post and avoiding groove to prevent radial offset, and includes an isolation middle shell and clamping assembly for stability and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the rotating shaft is made as an independent component for rotation adjustment, then the adaptability and ease of operation are improved, but the stability and reliability deteriorate due to radial deflection
Solution Approach 1:
The rotating shaft is divided into multiple segments: a fixed portion embedded in the housing, a movable portion that rotates, and a connection portion with elastic deformation capability. This segmentation allows the shaft to provide rotation adjustment while maintaining stability through the fixed portion and reducing radial deflection through the elastic connection portion.
Solution Approach 2:
The connection portion is nested within the rotating shaft structure, with the elastic deformation portion embedded in the shaft body. This nested design allows the elastic portion to absorb radial deflection forces while maintaining the overall integrity and rotational function of the shaft.
2Reliability
If the rotating shaft is firmly mounted to prevent radial offset, then the stability and reliability are improved, but the ease of operation and adaptability worsen due to reduced rotation smoothness
Solution Approach 1:
Different portions of the rotating shaft have different mechanical properties: the fixed portion provides rigid stability, the connection portion provides elastic flexibility for smooth rotation, and the movable portion provides rotational freedom. This local differentiation of mechanical properties resolves the contradiction between stability and ease of operation.
Solution Approach 2:
The connection portion is designed with elastic deformation capability that dynamically adapts to rotation forces. During rotation, the elastic portion deforms to accommodate movement and then returns to its original shape, providing smooth operation while maintaining overall stability through the fixed portion.
Data Source
AI summary
An earphone includes a housing provided with an accommodating groove and an opening groove. The opening groove connects the accommodating groove and the outside of the housing. A first hole is formed in the groove bottom of the accommodating groove. The earphone further includes an ear hanger, wherein one end of the ear hanger is provided with a rotating part inserted into the accommodating groove through the opening groove. The rotating part is provided with a second hole, a rotating shaft passes through the second hole and inserted into the first hole. The housing and the rotating part are rotatably connected around the rotating shaft. The earphone can effectively solve the problem that the rotating shaft of an existing ear-hanging earphone is prone to radial deflection, and is beneficial to enhancing the use hand feeling of a user.