Bone Conduction Headphone Speaker Layout for Lead Wire 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 reliability.
Innovation Solution
The headphone design includes a speaker assembly with a unique configuration of a speaker assembly that positions the speaker assembly at a facial area, incorporating a speaker assembly with a speaker assembly and a wearing assembly that positions the speaker assembly at the tragus of the user, featuring a bone conduction speaker with a specific lead wire arrangement and rotating shaft mechanisms to enhance structural stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lead wire is arranged in a conventional configuration, then the speaker assembly can be assembled easily, but the lead wire is prone to stretching and damage during vibration
Solution Approach 1:
The lead wire is arranged asymmetrically within the triangular region formed by the inner ring fixing portion, outer ring fixing portion, and transducer, with specific angular constraints (first angle less than second angle) to optimize its position away from high-stress vibration zones, thereby reducing stretching while maintaining assembly simplicity
Solution Approach 2:
The problem is solved by introducing angular/directional constraints in the planar arrangement of the lead wire within the triangular region, rather than only considering radial distance from centers. This dimensional approach optimizes the lead wire's path to minimize vibration-induced stress
2Reliability
If the transducer is rigidly fixed in the core housing, then the structural stability is improved, but the vibration transmission efficiency decreases
Solution Approach 1:
The first vibration transmitting plate is designed as an elastic component with flexible connecting portions that connect the inner ring fixing portion to the outer ring fixing portion. This flexible structure allows the transducer to vibrate freely while maintaining its positional stability within the core housing, thus preserving both structural stability and vibration transmission efficiency
Solution Approach 2:
The elastic connecting portions enable dynamic adaptation of the transducer's mounting structure, allowing it to flex and deform elastically during vibration cycles rather than being rigidly constrained. This dynamic behavior maintains structural integrity while permitting efficient vibration transmission
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
The design effectively reduces the likelihood of lead wire stretching during vibration, improving the structural stability and reliability of the speaker assembly, thereby extending its service life.
Implementation Method 1
The at least two elastic connecting portions are connected between the inner ring fixing portion and the outer ring fixing portion
Implementation Method 2
The bone conduction speaker includes a core housing, a first vibration transmitting plate, a transducer, a vibration plate, and a lead wire
Data Source
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.