Multi-DOF Transducer Flexure Isolation for Compact Electronics
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Solution Overview
Problem
Consumer electronics devices face challenges in isolating vibrations effectively due to their compact form factors and proximity of internal components, leading to undesirable couplings and transmission of unwanted excitation energy to sensors and users.
Innovation Solution
A transducer system with a vibration isolation system that includes a coil assembly and a magnet assembly, utilizing a suspension component with multiple flexures to suspend sub-assemblies and support brackets, effectively isolating vibrations by offsetting resonances and minimizing transmission to the device and user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a compact form factor is used in consumer electronics devices, then device portability and comfort are improved, but vibration isolation capability deteriorates due to limited space for isolation components
Solution Approach 1:
The transducer is divided into multiple sub-assemblies (first sub-assembly with coil assembly, second sub-assembly with magnets) that are independently suspended. This segmentation allows each sub-assembly to be isolated by dedicated flexure sets, enabling effective vibration isolation within a compact overall structure.
Solution Approach 2:
The vibration isolation system is integrated within the transducer assembly itself, with flexures nested between sub-assemblies and support brackets. The first sub-assembly is suspended from support brackets, the second sub-assembly is suspended from both the first sub-assembly and support brackets, creating a nested isolation structure that doesn't increase external device volume.
2Object-affected harmful factors
If additional vibration isolation components are introduced, then vibration isolation capability is improved, but device complexity and space requirements worsen
Solution Approach 1:
The flexures serve multiple functions: they suspend sub-assemblies, provide vibration isolation, and structurally connect components. The support brackets simultaneously provide structural support and serve as mounting points for the isolation system, reducing the need for separate dedicated isolation components.
Solution Approach 2:
The vibration isolation system is merged with the transducer assembly structure. The flexures are integrated into the support bracket system, and the isolation mechanism is combined with the transducer's electrical connection structure, eliminating the need for separate standalone isolation components.
3Volume of moving object
If internal components are placed in close proximity, then device compactness is improved, but undesirable mechanical and acoustomechanical couplings worsen
Solution Approach 1:
The harmful vibration and acoustic coupling between the transducer and other device components is extracted and isolated through the flexure system. The flexures physically separate the transducer sub-assemblies from the device housing and other components, preventing the transmission of mechanical and acoustomechanical disturbances despite close component proximity.
4Device complexity
If a simple single-degree-of-freedom transducer design is used, then device complexity is reduced, but vibration isolation performance deteriorates
Solution Approach 1:
The transducer design transitions from a static rigid structure to a dynamic multi-degree-of-freedom system with flexible elements. The flexures introduce controlled compliance and multiple degrees of freedom, allowing the system to dynamically respond to and isolate vibrations while maintaining a relatively simple overall design architecture.
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 solution significantly reduces vibration transmission to the device and user, enhancing user experience by minimizing mechanical and acoustomechanical couplings while maintaining a compact form factor.
Implementation Method 1
a suspension component that includes a plurality of flexures. The plurality of flexures include a first set of flexures configured to suspend the first sub-assembly from the support brackets
Implementation Method 2
The transducer includes a first sub-assembly including a coil assembly, and a second sub-assembly including one or more magnets
Data Source
AI summary
A transducer system isolates vibrations produced by a transducer. The transducer system comprises the transducer and a vibration isolation system. The transducer can produce vibrations and is configured to be coupled to a device. The transducer includes a first sub-assembly including a coil assembly and a second sub-assembly including one or more magnets. The vibration isolation system is configured to isolate vibrations produced by the transducer from the device. The vibration isolation system includes a plurality of support brackets, and a suspension component including a plurality of flexures. The plurality of flexures includes a first set of flexures configured to suspend the first sub-assembly from the support brackets, a second set of flexures configured to suspend the second sub-assembly from the first sub-assembly, and a third set of flexures configured to suspend the second sub-assembly from the support brackets.