Compressible Loudspeaker Lead Wire Axial Oscillation
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Solution Overview
Problem
Existing loudspeakers have long and curved lead wires that require additional space within the speaker enclosure, leading to a larger footprint and potential stress concentration, which can result in lead wire failure due to non-uniform stress distribution.
Innovation Solution
A compressible lead wire with an elastic portion, such as a helical or conic helical design, that extends and contracts axially to allow the voice coil to oscillate freely, reducing the need for additional space and distributing stress uniformly, thereby enhancing compactness and acoustic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If long and curved lead wires are used to allow voice coil movement, then flexibility and movement capability are improved, but the speaker footprint and internal space requirements increase
Solution Approach 1:
The lead wire is segmented into multiple straight sections connected by bend locations, transforming a single long curved wire into a series of shorter segments. This segmentation allows the lead wire to achieve the necessary flexibility and movement capability while reducing the overall footprint and space requirements within the speaker enclosure.
2Ease of operation
If lead wire is routed through gaps between speaker housing and magnets, then connection to voice coil is achieved, but speaker compactness is reduced
Solution Approach 1:
The lead wire routing is moved from the radial dimension (through gaps between housing and magnets) to the axial dimension (through the voice coil assembly). By extending the lead wire axially through the voice coil rather than radially through magnetic gaps, the speaker housing can be compacted to close the radial gaps, improving overall speaker compactness while maintaining lead wire connectivity.
3Ease of manufacture
If lead wire has single bend location to simplify structure, then manufacturing is easier, but stress distribution becomes non-uniform leading to failure
Solution Approach 1:
The lead wire is divided into multiple straight sections with multiple bend locations distributed along its length. This segmentation creates multiple stress distribution points rather than a single concentration point, uniformly distributing mechanical stress during voice coil movement and significantly improving lead wire reliability and durability.
4Volume of stationary object
If elastic portion is contained within cavity rather than extending through gap, then space is optimized, but lead wire routing complexity increases
Solution Approach 1:
The lead wire routing is merged with the voice coil assembly structure. By extending the lead wire axially through the voice coil and containing the elastic portion within the voice coil assembly cavity, the routing path is integrated into the existing structural components rather than requiring separate routing channels, thereby optimizing space utilization without significantly increasing overall complexity.
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 compressible lead wire design allows for a more compact loudspeaker with reduced stress on the lead wire, minimizing the likelihood of failure and improving acoustic performance by optimizing the use of internal space and distributing stress uniformly.
Implementation Method 1
the lead wire has an elastic portion that includes several compressible elements. The compressible elements are configured to extend and compress in the axial direction when the voice coil and the diaphragm move
Implementation Method 2
the elastic portion of the lead wire is a helical portion. The helical portion can have several helical turns. The helical turns are the compressible elements that expand and contract when the voice coil and the diaphragm move in the axial direction
Implementation Method 3
an electrical audio input signal is applied to the voice coil, which interacts with a magnet to generate a mechanical force that moves the voice coil
Data Source
AI summary
A loudspeaker having a compressible lead wire is described. The lead wire carries an electrical audio input signal to a voice coil. The electrical audio input signal drives the voice coil to oscillate in an axial direction. The compressible lead wire includes an elastic portion that stretches and compresses in the axial direction to allow the voice coil to oscillate freely. The elastic portion includes several compressible elements that are located within a cavity of the loudspeaker. The compressible elements extend through the cavity in the axial direction. Other aspects are also described and claimed.