Multiple-Input Loudspeaker With Segmented Coils for Lower Distortion
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Solution Overview
Problem
Existing loudspeakers with multiple coils on a single voice coil suffer from increased weight, leading to reduced sensitivity and distortion, and are limited by their single signal input capability.
Innovation Solution
A multi-input-driving loudspeaker design featuring a main input-driving mechanism surrounded by multiple secondary input-driving mechanisms, utilizing multiple voice coils to drive the cone, with a compact structure that includes a damper for the main mechanism and a U-yoke for the secondary mechanisms, reducing distortion and increasing sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sets of coils are wound on one voice coil to enable multiple signal input, then the loudspeaker can accept multiple audio signals, but the weight of the voice coil increases and sensitivity is lost
Solution Approach 1:
The patent divides the single voice coil into multiple separate voice coils (first voice coil and second voice coil), each responsible for specific frequency ranges. This segmentation allows independent optimization of each coil's weight and performance while collectively providing multi-signal input capability, thus avoiding the weight penalty of a single heavy multi-coil assembly.
Solution Approach 2:
The patent extracts the multi-signal processing function from the voice coil structure itself and relocates it to the signal processing system. Multiple audio signals are processed separately and then combined to drive the cone, separating the signal handling complexity from the mechanical voice coil mass.
2Adaptability or versatility
If multiple sets of coils are wound on one voice coil to enable multiple signal input, then the loudspeaker can accept multiple audio signals, but the sensitivity of the loudspeaker is reduced
Solution Approach 1:
By segmenting the voice coil system into separate first and second voice coils, each can be optimized for its specific frequency range with appropriate sensitivity characteristics. The segmented design allows better control over the electromagnetic coupling and reduces the overall mass that would otherwise dampen sensitivity.
Solution Approach 2:
The patent applies local quality by assigning different functional characteristics to different parts of the system. The first voice coil is optimized for certain frequency responses while the second voice coil handles other frequencies, with each component having locally optimized properties for its specific role, thereby maintaining high sensitivity across the overall system.
3Device complexity
If a single signal input voice coil is used, then the structure is simple, but the reproduction of original sound is limited
Solution Approach 1:
The patent segments the sound reproduction function into multiple independent voice coil channels, each handling specific frequency bands. This segmentation enables more accurate and comprehensive sound reproduction by assigning specialized tasks to individual coils rather than using a single general-purpose coil that must compromise across all frequencies.
Solution Approach 2:
The patent implements multi-functionality by designing the voice coil system to handle multiple signal inputs simultaneously for different frequency ranges. The first and second voice coils work together to provide universal coverage across the audio spectrum, enabling a single system to perform multiple reproduction functions that would otherwise require separate devices.
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 design enhances driving energy, reduces product size, and improves sound reproduction quality by increasing sensitivity and intelligibility while maintaining a compact form factor.
Implementation Method 1
the voice coil is formed by stacking multiple sets of coils from the inside to the outside, and the conical cone and the damper are glued on the outer wall of the voice coil respectively to form a loudspeaker vibration system
Data Source
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AI summary
Disclosed is a multi-input-driving loudspeaker, which reduces the distortion of a loudspeaker, increases the sensitivity of a loudspeaker and improves the definition of a loudspeaker, and has a compact structure. The loudspeaker comprises a basket, a cone, a main input-driving mechanism and a plurality of secondary input-driving mechanisms, the main input driving mechanism being arranged between the plurality of secondary input driving mechanisms; the main input driving mechanism comprises a main voice coil, a T-yoke, a front sheet and a first magnetic steel, a main voice coil mounting hole being provided in the middle of the cone, an upper end portion of the main voice coil being connected to the main voice coil mounting hole, and a central hole being provided in the middle of the basket; each secondary input-driving mechanism respectively comprises a secondary voice coil and a secondary magnetic circuit assembly formed with a secondary magnetic gap, a plurality of secondary voice coil mounting holes are correspondingly provided on the cone, an upper end portion of each secondary voice coil is connected to a corresponding secondary voice coil mounting hole, a plurality of secondary magnetic circuit mounting holes are correspondingly provided on the basket, and a lower portion of each secondary voice coil is inserted into a corresponding secondary magnetic gap through a corresponding secondary magnetic circuit mounting hole.