Loudspeaker Armature Bending for Vibration Reduction
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Solution Overview
Problem
Current loudspeaker designs face challenges in vibration reduction, efficiency, and output, particularly at higher frequencies, due to the use of dual receivers which increase cost, complexity, and size, and are not effective for higher frequencies, with single receivers having lower efficiency and output.
Innovation Solution
A loudspeaker design featuring an armature attached to the base at two positions, allowing it to bend into a U-shape, which reduces vibration through balanced mass distribution and uses multiple drive pins for piston-like movement of the diaphragm, enhancing sound generation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If dual receivers are used for vibration reduction, then vibration performance is improved, but cost, complexity, and size increase
Solution Approach 1:
The armature is divided into multiple segments (first armature portion and second armature portion) that can move independently. The first armature portion is coupled to the first diaphragm while the second armature portion is coupled to the second diaphragm, allowing each segment to handle specific frequency ranges and reduce vibration effectively without requiring a complete dual receiver system
Solution Approach 2:
The armature is designed to be movable rather than fixed, with the ability to bend and deform dynamically in response to acoustic loads. The armature can change its configuration between different operational states, transitioning from a rigid structure to a flexible one that adapts to varying sound pressure conditions, enabling vibration reduction across different frequency ranges
2Object-affected harmful factors
If dual receivers are used for vibration reduction, then vibration performance is improved, but size increases
Solution Approach 1:
The patent combines the functions of multiple receivers into a single integrated armature structure. The first and second armature portions are merged into one continuous armature that can be driven by a single coil assembly, eliminating the need for separate receiver components and reducing overall device size while maintaining vibration reduction capability
Solution Approach 2:
The single armature structure serves multiple functions: it acts as both a vibration reduction mechanism and a sound generation element. The armature can be configured to handle both low and high frequency sounds through its different portions, making it a universal component that replaces what would traditionally require separate specialized receivers
3Volume of moving object
If single receiver is used, then size is reduced, but efficiency and output decrease
Solution Approach 1:
The armature is segmented into multiple portions that can be driven simultaneously, effectively creating multiple sound generation sources from a single receiver structure. This segmentation allows the system to achieve higher output and efficiency comparable to dual receivers while maintaining a single receiver configuration and reduced size
Solution Approach 2:
The patent introduces a spatial dimension to the single receiver design by extending the armature in multiple directions with different portions positioned at different locations. This dimensional expansion allows the single receiver to interact with the acoustic field in more complex ways, generating sound in multiple directions and increasing overall output efficiency
4Productivity
If diaphragm is hinged at one side, then maximum output is limited to half, but piston movement would require complex mechanisms
Solution Approach 1:
The diaphragm is segmented into multiple portions that are independently coupled to different armature portions. This segmentation allows each diaphragm portion to move freely in response to armature motion, achieving piston-like movement and maximum output without requiring complex hinge mechanisms or additional moving parts
Solution Approach 2:
The diaphragm portions naturally follow the motion of the armature portions they are coupled to, converting armature movement directly into diaphragm motion. This self-service mechanism eliminates the need for external hinge joints or complex transmission mechanisms, achieving efficient piston movement through the inherent coupling between armature and diaphragm segments
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 design achieves reduced vibration, increased sound reproduction efficiency, especially at higher frequencies, by distributing force evenly along the armature and using multiple drive pins for efficient piston movement, resulting in improved sound output and reduced size.
Implementation Method 1
a coil configured to generate a magnetic flux in the armature
Implementation Method 2
a magnet configured to output a magnetic field in a magnet gap
Data Source
AI summary
A loudspeaker having a first magnet configured to output a first magnetic field in a first magnet gap, an elongate armature extending through the first magnet gap, a first coil configured to generate a magnetic flux in the armature, a first diaphragm, a first element configured to transfer force and/or movement from the armature to the first diaphragm, a base and a first and a second support element, the first support element connecting the armature to the base at a first longitudinal position at a first side of a predetermined portion along the length of the armature, and the second support element connecting the armature to the base at a second longitudinal position at a second, opposite side of the predetermined portion. The base may flex between a U-shape and an inverted U-shape and may thus provide force to move the diaphragm.