Small Dual-Cone Loudspeaker With Segmented Voice Coils
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Solution Overview
Problem
Existing single-cone loudspeakers with no damper are limited to single-channel audio input, affecting sound reproduction clarity and sensitivity due to high rigidity requirements and increased weight from multiple coils, while multi-channel input loudspeakers with stacked coils suffer from decreased sensitivity and sound clarity.
Innovation Solution
A dual-cone loudspeaker design with a central cone and multiple outer cones, each driven by separate magnetic systems and voice coils, allowing for multi-channel audio input and improved sound reproduction through independent vibration mechanisms.
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 the loudspeaker can accept multiple signal inputs, 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 and second voice coil), each corresponding to different channels. This segmentation allows each coil to be lighter while collectively providing multi-channel input capability, resolving the contradiction between versatility and weight.
2Device complexity
If a single voice coil is combined with a cone to form a vibration system, then the structure is simple, but there is a high requirement for the rigidity of the cone
Solution Approach 1:
The patent segments the vibration system into multiple independent units, with each voice coil corresponding to a specific cone section. This segmentation distributes the rigidity requirements across multiple smaller cone sections rather than requiring one large rigid cone, thereby reducing the overall rigidity requirement while maintaining structural simplicity.
3Adaptability or versatility
If multiple magnetic driving systems are used to drive multiple voice coils, then multi-channel input is enabled, but the sound reproduction clarity needs to be improved
Solution Approach 1:
The patent applies local quality by assigning different magnetic driving systems with potentially different characteristics to different voice coils and cone sections. Each local unit (voice coil + cone section) can be optimized for its specific frequency range or channel, improving overall sound reproduction clarity while maintaining multi-channel capability.
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
Enhances sound reproduction clarity and sensitivity by broadening frequency bandwidth and reducing distortion, with the central cone handling midrange and treble, and outer cones handling bass and midrange, while maintaining a compact design.
Implementation Method 1
a central magnetic driving system for driving the central voice coil, and each of the plurality of outer driving mechanisms comprises an outer voice coil connected to the outer cone, and an outer magnetic driving system for driving the corresponding outer voice coil
Data Source
AI summary
Disclosed is a dual-cone loudspeaker, including: a frame; a cone assembly arranged on the frame and including a central cone and an outer cone; a central driving mechanism for driving the central cone to vibrate; and a plurality of outer driving mechanisms for driving the outer cone to vibrate. The outer driving mechanisms are arranged around the central driving mechanism. 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. Each of the plurality of outer driving mechanisms includes an outer voice coil connected to the outer cone, and an outer magnetic driving system for driving the outer voice coil.