Bone Conduction Speaker Lead Layout for Vibration Stability
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Solution Overview
Problem
The structure of bone conduction speakers in headphones is unstable during vibration, leading to potential damage and reduced service life of the speaker assembly.
Innovation Solution
The headphone design includes a speaker assembly with a bone conduction speaker featuring a first vibration transmitting plate with an angle between the first lead portion and the short axis direction SD1, and the first lead portion 461 is arranged along the long axis direction LD1, reducing the ratio of a tensile length generated during vibration, thus enhancing structural stability and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lead wire is connected directly between the inner ring fixing portion and outer ring fixing portion, then the connection is simple, but the lead wire is excessively stretched during vibration causing structural instability
Solution Approach 1:
The lead wire is arranged along the long axis direction of the first vibration transmitting plate, utilizing the dimensional space along the long axis to reduce stretching during vibration. This dimensional arrangement allows the lead wire to accommodate vibration movements while maintaining electrical connection, resolving the contradiction between simple connection and structural stability.
2Reliability
If the transducer is rigidly fixed in the core housing, then the structure is stable, but the transducer cannot vibrate freely to produce sound
Solution Approach 1:
The first vibration transmitting plate with elastic connecting portions serves as a flexible connection structure that allows the transducer to vibrate freely while maintaining stable fixation. The elastic connecting portions provide the necessary flexibility for vibration while keeping the transducer securely positioned in the core housing, resolving the contradiction between fixation stability and vibration freedom.
3Length of moving object
If the first lead portion is arranged along the short axis direction, then the connection length is shorter, but the tensile stress during vibration is excessive
Solution Approach 1:
The first lead portion is arranged along the long axis direction rather than the short axis direction, creating an asymmetric arrangement that optimizes for tensile stress resistance during vibration. This asymmetric positioning along the long axis provides greater tolerance for vibration-induced stretching, resolving the contradiction between connection length and tensile resistance.
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
This configuration effectively reduces the possibility of the transducer excessively stretching the lead wire, improving the structural stability and reliability of the speaker assembly, and extending its service life.
Implementation Method 1
The speaker assembly includes a bone conduction speaker. The bone conduction speaker includes a core housing, a first vibration transmitting plate, a transducer, a vibration plate, and a lead wire
Implementation Method 2
The at least two elastic connecting portions are connected between the inner ring fixing portion and the outer ring fixing portion
Implementation Method 3
The vibration plate is connected to the transducer
Data Source
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AI summary
The present disclosure discloses a headphone, and the headphone comprises a speaker assembly and a wearing assembly. The speaker assembly includes a bone conduction speaker. The bone conduction speaker includes a core housing, a first vibration transmitting plate, a transducer, a vibration plate, and a lead wire. The first vibration transmitting plate includes an inner ring fixing portion, an outer ring fixing portion, and at least two elastic connecting portions. The at least two elastic connecting portions are connected between the inner ring fixing portion and the outer ring fixing portion, the inner ring fixing portion is connected to the transducer, the outer ring fixing portion is connected to the core housing, so that the transducer is suspended in the core housing, and the vibration plate is connected to the transducer. The lead wire is connected to the transducer and includes a first lead portion extending from the inner ring fixing portion to the outer ring fixing portion. A dimension of the first vibration transmitting plate along a long axis direction is larger than a dimension of the first vibration transmitting plate along a short axis direction, and an angle between the first lead portion and the long axis direction is less than an angle between the first lead portion and the short axis direction. In this way, the structural stability of the speaker assembly can be enhanced.