Integrally Formed Loudspeaker Membrane Conductor
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Solution Overview
Problem
Prior art electrodynamic loudspeakers for mobile devices face excessive stress on coil leads due to inadequate fixation and support, leading to potential damage and noise from air turbulence, and occupy valuable space that could be used for improved magnet placement.
Innovation Solution
An integrally formed electrical conductor within the membrane of the loudspeaker, which is net-shaped and sandwiched between layers of membrane material, eliminates the need for separate coil leads, reducing mechanical stress and air turbulence while providing a more compact and durable connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If leads are routed in air without fixation or support, then device complexity is reduced, but mechanical stress on leads increases excessively
Solution Approach 1:
The patent merges the lead support function into the membrane structure itself by creating a composite membrane that includes both the acoustic membrane and support structures integrated as a single unit. This eliminates the need for separate lead fixation components while providing mechanical support to reduce stress on leads during diaphragm movement.
Solution Approach 2:
The patent implements preliminary action by pre-positioning support structures and lead routing paths within the membrane design before assembly. The support structures are built-in from the beginning to prevent excessive lead stress, rather than adding corrective measures after the fact.
2Stability of the object's composition
If leads are glued to membrane or frame, then lead positioning is improved, but mechanical stress on leads increases due to rigid fixation
Solution Approach 1:
The patent uses the flexible membrane structure itself as the support medium for leads, rather than rigid glue fixation. The membrane's inherent flexibility allows it to move with the diaphragm while providing continuous support to leads, distributing mechanical stress along the lead path rather than concentrating it at fixed points.
3Ease of operation
If soft glue is used to affix leads, then lead flexibility is maintained, but mechanical stress on leads increases and connection reliability decreases
Solution Approach 1:
The patent combines the lead support function with the membrane structure itself, eliminating the need for separate adhesive materials. The integrated support structures provide mechanical reinforcement that distributes stress away from connection points, improving durability while maintaining flexibility through the membrane's natural properties.
4Reliability
If separate lead routing structures are added, then lead stress is reduced, but device complexity and space requirements increase
Solution Approach 1:
The patent merges multiple functions into the membrane structure: acoustic diaphragm function, lead support function, and mechanical reinforcement function. This integration reduces overall device complexity by eliminating separate lead routing structures while still providing stress relief through the membrane's inherent flexibility and built-in support geometry.
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 integrally formed electrical conductor reduces mechanical stress on the coil, enhances durability by eliminating air turbulence and noise, and allows for more flexible magnet placement and design, improving the overall performance and efficiency of the speaker.
Implementation Method 1
The coil includes two leads to feed an electrical signal into the coil. The coil is arranged within a magnetic field formed of a population of magnets. The electrical signal fed into the coil causes the coil and connected membrane to vibrate which generates an acoustic sound
Data Source
AI summary
A membrane (112) for an acoustic device including an electrical conductor (120) integrally formed within the membrane (112). The integrally formed electrical conductor (120) may be net-shaped and may be formed between two or more layers of membrane material. The integrally formed electrical conductor (120) may be electrically connected to the voice coil in an acoustic device, wherein the integrally formed electrical conductor (120) is adapted to provide an electrical signal to the voice coil during operation of the acoustic device. Additionally or alternatively, the integrally formed electrical conductor (120) may be electrically connected to one or more electrical and/or electronic components (240) affixed to the membrane (112).