Passive Radiator Protection via Interlaced Cover and Plate
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Solution Overview
Problem
Existing passive radiator structures in speaker systems face challenges in preventing sound obstruction while providing protection during vibration.
Innovation Solution
A passive radiator mechanism comprising a passive vibration plate with protruding portions and a protective cover with passages, where the protruding portions move between positions interlaced with the protective cover, ensuring sound passage and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the passive radiator is mounted in an exposed form on the external surface of the speaker box, then the sound produced by low-frequency vibration is not blocked, but external objects can easily press against the passive radiator and block the vibration, affecting sound output
Solution Approach 1:
The patent introduces a protective cover as an intermediary element between the passive radiator and external objects. The cover includes through-holes that allow sound to pass through while preventing direct contact between external objects and the passive radiator membrane, thus resolving the contradiction between sound transmission and physical protection
Solution Approach 2:
The protective cover is designed with non-uniform local properties: it is opaque or translucent in most areas for protection, but contains specific through-holes that are acoustically transparent. This local differentiation allows different regions of the cover to serve different functions - protection versus sound transmission
2Object-affected harmful factors
If the passive radiator is hidden inside a speaker box with localized air vents, then the passive radiator is protected from external pressure, but the sound produced by low-frequency vibrations is blocked to some extent
Solution Approach 1:
The protective cover functions as a porous-like structure with through-holes distributed across its surface. These holes allow acoustic energy to pass through while the solid material of the cover provides mechanical protection, similar to how porous materials allow fluid passage while providing structural integrity
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 mechanism effectively prevents sound obstruction and protects the passive radiator during vibration, enhancing low-frequency resonance and sound quality.
Implementation Method 1
Their main function is to enhance the speaker's low-frequency effects through a resonance effect with active acoustic units (e.g., speakers)
Data Source
AI summary
The present application relates to a passive radiator mechanism and a speaker box. The passive radiator mechanism includes a passive radiator assembly and a protective cover, the passive radiator assembly includes a passive vibration plate and at least two protruding portions arranged on a first surface of the passive vibration plate. The protective cover is disposed outside the passive vibration plate and is opposite to the first surface, and the protective cover is provided with a plurality of passages penetrating the protective cover. The passive vibration plate is configured to vibrate with the sound of the speaker box and can drive the protruding portions to move between a first position and a second position, and the protective cover is located between the first position and the second position. The passive radiator mechanism can protect the passive vibration plate during vibration and prevent sound blockage.