Multi-Cone Loudspeaker Layout for Clearer Multi-Channel Audio
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Solution Overview
Problem
Traditional loudspeakers with disc-shaped cones and multiple voice coils face limitations in sound reproduction clarity and sensitivity due to increased weight and complexity, which affects their performance when handling multi-channel audio signals.
Innovation Solution
A multi-cone loudspeaker design featuring a central cone and multiple outer cones, each driven by independent magnetic systems, allows for multi-channel audio input, enhancing sound reproduction clarity and sensitivity by distributing sound production across multiple cones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple groups of coils are wound into one voice coil to enable multi-channel signal input, then multi-channel signal input capability is achieved, but the weight of the voice coil increases and sensitivity decreases
Solution Approach 1:
The patent divides the single voice coil into multiple separate voice coils (first voice coil, second voice coil, third voice coil, etc.), each corresponding to a specific cone and magnetic driving system. This segmentation allows each voice coil to be optimized independently, reducing the weight of individual voice coils while maintaining multi-channel signal input capability through distributed arrangement.
Solution Approach 2:
The patent transitions from a stacked radial arrangement (inside-to-outside stacking) to a distributed circumferential arrangement where multiple voice coils are arranged around the periphery of the central magnetic driving system. This dimensional change from vertical stacking to horizontal distribution reduces the weight concentrated in the moving system while achieving multi-channel input.
2Device complexity
If a single voice coil is combined with a disc-shaped cone, then the structure is simple, but there is a high requirement for the rigidity of the cone material and sound reproduction clarity is limited
Solution Approach 1:
The patent segments the single disc-shaped cone into multiple cones (central cone and multiple outer cones), with each cone driven by its own voice coil and magnetic driving system. This segmentation reduces the rigidity requirement for each individual cone while improving sound reproduction clarity through distributed sound production across multiple cones.
Solution Approach 2:
The patent assigns different functions to different cones: the central cone produces midrange and treble sounds, while the outer cones produce bass sounds. This local quality differentiation allows each cone to be optimized for its specific frequency range, reducing overall material rigidity requirements while improving sound reproduction.
3Adaptability or versatility
If multiple magnetic driving systems are used to drive multiple voice coils, then multi-channel audio input is enabled, but sound reproduction clarity needs to be improved
Solution Approach 1:
The patent optimizes each magnetic driving system and corresponding cone for specific frequency ranges: central magnetic driving systems drive central cones for midrange and treble, while outer magnetic driving systems drive outer cones for bass. This local optimization of quality parameters for different frequency ranges improves overall sound reproduction clarity.
Solution Approach 2:
The patent employs conical shapes with specific curvature characteristics for the central and outer cones, optimizing the surface geometry for different frequency ranges. The curved conical surfaces improve sound radiation efficiency and clarity for their respective frequency bands.
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 multi-cone design improves sound reproduction clarity, increases sensitivity, and reduces distortion by utilizing multiple cones for midrange, treble, and bass production, expanding frequency bandwidth and directivity while maintaining a compact form factor.
Implementation Method 1
a central magnetic driving system for driving the central voice coil... an outer magnetic driving system for driving the outer voice coil
Data Source
AI summary
Disclosed is a multi-cone loudspeaker, including a cone assembly. The cone assembly includes a central cone and a plurality of outer cones successively arranged in a circumferential direction of the central cone. The central cone is driven by a central driving mechanism to vibrate and sound, each of the plurality of outer cones is driven by one of outer driving mechanism to vibrate and sound. The central driving mechanism includes a central voice coil connected to the central cone, and a central magnetic driving system for driving the central voice coil, and each of the plurality of outer driving mechanism includes an outer voice coil connected to one of the plurality of outer cones, an outer damper sleeved on the outer voice coil, and an outer magnetic driving system for driving the outer voice coil.