Speaker Frame Asymmetric Connection Beams Distortion
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Solution Overview
Problem
Speaker frames for motor vehicle applications experience distortion and resonance issues when mounted on door panels, leading to unwanted noise and reduced acoustic performance due to the equal inclination angles of connection beams, causing displacement of the voice coil within the magnetic circuit and vibration-induced resonance.
Innovation Solution
A speaker frame design where the inclination angles of connection beams to the central axis differ in a cross-section, enhancing rigidity while reducing weight and preventing distortion and resonance, achieved through varied connection beam configurations such as linear, H-shaped, and grooved structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If connection beams are arranged with equal inclination angles to the central axis, then the frame structure is simple and easy to manufacture, but the frame becomes distorted and curved when mounted on motor vehicle door panels
Solution Approach 1:
The patent applies asymmetry by configuring connection beams with different inclination angles relative to the central axis of the speaker frame. Specifically, connection beams on one side of the central axis have a first inclination angle, while connection beams on the other side have a second inclination angle that differs from the first. This asymmetric arrangement compensates for external forces and moments applied to the frame during motor vehicle operation, preventing distortion and curvature while maintaining manufacturing feasibility.
2Stability of the object's composition
If connection beams are made rigid to prevent frame distortion, then frame stability improves, but the weight of the frame increases
Solution Approach 1:
The patent applies parameter changes by optimizing the inclination angles of connection beams to achieve the desired rigidity and stability without increasing overall frame weight. By carefully selecting different inclination angles for connection beams on opposite sides of the central axis, the frame achieves enhanced resistance to distortion and external forces while maintaining a lightweight construction suitable for motor vehicle door panel mounting.
3Weight of moving object
If the frame is made lightweight to reduce vehicle weight, then fuel efficiency improves, but the frame becomes more susceptible to distortion and resonance
Solution Approach 1:
The asymmetric configuration of connection beams with different inclination angles provides an efficient structural solution that maintains frame rigidity and resistance to distortion without requiring additional material or weight. This asymmetric design allows the lightweight frame to effectively counteract external forces and moments applied during motor vehicle operation, preventing resonance and maintaining acoustic performance while keeping the overall vehicle weight low for improved fuel efficiency.
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 effectively prevents distortion and resonance, maintaining acoustic performance by ensuring the speaker frame's rigidity and reducing unwanted noise, while allowing for improved vibration cancellation and secure mounting on motor vehicle door panels.
Implementation Method 1
enhancing rigidity while reducing weight and preventing distortion and resonance
Implementation Method 2
allowing for improved vibration cancellation and secure mounting on motor vehicle door panels
Data Source
AI summary
A speaker frame, including: a vibration support portion supporting a vibrating body of a speaker; a magnet support portion arranged inside of said vibration support portion and supporting magnetic circuit portion of said speaker; and a plurality of connection beams connecting said vibration support portion and said magnet support portion, wherein the vibration support portion and the magnet support portion have a circular ring shape having the same major axis length and minor axis length, said plurality of connection beams are arranged radially centering on a central axis from said magnet support portion to said vibration support portion, the central axis being parallel to a direction of an acoustic radiation, and a length of one of said connection beams and a length of another connection beams are different from each other.