Vibration Unit Wavy Suspension Lateral Movement Control
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Solution Overview
Problem
Conventional acoustic devices face issues with vibration diaphragms that uncontrollably move in multiple directions due to U-shaped suspensions, leading to unbalanced voice coil movement, potential damage, and compromised sound quality, especially at low frequencies, making them unsuitable for compact electronic devices.
Innovation Solution
A vibration unit with a wavy configuration suspension that provides a 3-dimensional connection between the vibration member and the encircling frame, restricting lateral movement and ensuring linear reciprocation, thereby stabilizing sound reproduction and reducing the required installation space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a U-shaped suspension is used to support the vibration diaphragm, then the diaphragm can be reciprocatingly moved, but the diaphragm uncontrollably moves in multiple directions including lateral movement
Solution Approach 1:
The suspension is designed with a three-dimensional wavy configuration instead of a conventional two-dimensional U-shape. The wavy structure extends in the vertical direction with multiple peaks and valleys, creating a three-dimensional support structure that provides lateral stability while maintaining reciprocating movement capability. This dimensional enhancement allows the suspension to constrain lateral movement through its spatial geometry.
Solution Approach 2:
The suspension features a wavy configuration with curved peaks and valleys instead of straight lines. This curvature design provides mechanical stability by distributing stress along the curved paths and preventing lateral displacement. The wavy shape creates natural lateral support through its geometric form, ensuring the vibration diaphragm moves only in the intended reciprocating direction.
2Ease of operation
If the suspension allows lateral movement for reciprocating motion, then the diaphragm can vibrate, but the voice coil becomes unbalanced and may scratch the speaker frame
Solution Approach 1:
The three-dimensional wavy suspension structure provides lateral support through its vertical extension and curvature, keeping the voice coil aligned with its center axis during reciprocating movement. This prevents the voice coil from scratching the speaker frame while maintaining vibration capability.
Solution Approach 2:
The wavy configuration of the suspension acts as a pre-designed constraint mechanism that prevents lateral displacement before it can cause damage. The multiple peaks and valleys in the wavy structure create natural stop points that cushion and limit the movement range, protecting the voice coil from excessive lateral movement and potential damage to the speaker frame.
3Ease of operation
If the suspension has a U-shaped cross section, then it provides elastic force for reciprocating movement, but the upward displacement is not the same as downward displacement
Solution Approach 1:
The suspension transitions from a two-dimensional U-shape to a three-dimensional wavy structure with multiple peaks and valleys. This vertical extension creates symmetric elastic force distribution, ensuring that upward and downward displacements are equal. The wavy configuration provides multiple elastic pathways that balance the force distribution in both directions.
Solution Approach 2:
While the overall structure appears asymmetric with its wavy configuration, the design achieves functional symmetry in terms of elastic force provision. The alternating peaks and valleys are designed to provide equal and opposite elastic forces during upward and downward movement, creating symmetric displacement characteristics despite the visually asymmetric wavy form.
4Reliability
If the vibration diaphragm is made large enough to vibrate via the suspension, then sound reproduction is improved, but the speaker size increases and cannot be incorporated with compact electronic devices
Solution Approach 1:
The three-dimensional wavy suspension allows for more efficient use of vertical space, enabling better sound reproduction without increasing the horizontal footprint. The vertical extension of the wavy structure provides the necessary vibration amplitude and elastic force within a compact overall volume, making it suitable for integration into compact electronic devices.
Solution Approach 2:
The wavy suspension structure effectively nests multiple functional elements within a compact form. The alternating peaks and valleys create a space-efficient design that accommodates the vibration diaphragm and provides sufficient vibration amplitude without requiring a large overall speaker size, enabling integration into compact 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 wavy suspension design enhances sound quality, durability, and safety while minimizing space requirements, allowing for integration into compact devices without altering the original acoustic module design, and simplifying manufacturing processes.
Implementation Method 1
the suspension is made of elastic material and is formed in U-shape such that the suspension provides an elastic force to enable the vibration diaphragm to be reciprocatingly moved
Data Source
AI summary
A vibration unit includes an encircling frame defining a vibration cavity therewithin, a vibration member disposed in the vibration cavity, and a suspension including an elastic diaphragm having a periodical wave-shape extended between the vibration member and the encircling frame to support the vibration member within the vibration cavity. The wave-shape diaphragm provides a 3-dimensional connection between the vibration member and the encircling frame to self-generate a repelling force to against a lateral movement of the vibration member so as to ensure the vibration member to be reciprocatingly moved in a linear direction.