Continuous Loudspeaker Diaphragm with Reinforcing Ring
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Solution Overview
Problem
Conventional loudspeakers often require additional height due to dust caps covering voice coils, limiting their installation in shallow compartments and increasing manufacturing costs, while also facing stress issues at the diaphragm-voice coil connection that can affect sound output and frequency response.
Innovation Solution
A diaphragm configuration with a continuous, uniformly thin primary diaphragm and a reinforcing ring attached to the upper surface, where the reinforcing ring's inside diameter coincides with the diaphragm's inner diameter, providing localized strength without increasing the overall mass or altering the diaphragm's geometry, and eliminating the need for a dust cap to reduce height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a dust cap is used to cover the voice coil, then the voice coil is protected, but the loudspeaker height increases and installation in shallow compartments becomes difficult
Solution Approach 1:
The dust cap function is merged with the diaphragm by making the diaphragm continuous across the voice coil assembly, eliminating the need for a separate dust cap component while maintaining voice coil coverage and protection
Solution Approach 2:
The separate dust cap component is extracted/removed from the loudspeaker assembly, with its protective function being integrated into the diaphragm structure itself, thereby reducing overall height
2Device complexity
If the diaphragm is made thin and continuous, then manufacturing complexity is reduced, but stress at the diaphragm-voice coil connection point increases
Solution Approach 1:
A reinforcing ring is added at the specific location where the diaphragm connects to the voice coil assembly, providing localized strength enhancement only at the stress-prone connection point while maintaining the thin, continuous structure and uniform mass distribution of the rest of the diaphragm
3Reliability
If multiple loudspeakers are used to cover wide frequency range, then frequency response improves, but device complexity and cost increase
Solution Approach 1:
The diaphragm's physical parameters (mass, shape, material properties) are optimized to enable a single loudspeaker to achieve wide frequency response coverage, eliminating the need for multiple speakers and their associated 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
This configuration allows for a reduced height loudspeaker that maintains desired frequency response and sound output while withstanding operational stresses, reducing manufacturing complexity and costs, and enabling installation in shallow spaces.
Implementation Method 1
A common form of loudspeaker uses a diaphragm (such as, for example, a paper cone) supporting a voice coil electromagnet acting on a permanent magnet
Data Source
AI summary
A diaphragm for a loudspeaker may include a continuous primary diaphragm having an upper surface and a lower surface, where the primary diaphragm comprises a ring-shaped, flat region having an inner diameter and an outer diameter. The diaphragm may also include a reinforcing ring attached to the upper surface of the primary diaphragm, where the reinforcing ring has an inside diameter and an outside diameter, and where the reinforcing ring is attached to the upper surface of the primary diaphragm such that the inside diameter of the reinforcing ring coincides with the inner diameter of the flat region.