Exciter Voice Coil Bobbin Vibration Transmission
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Solution Overview
Problem
Conventional exciters face difficulties in reproducing high-frequency sounds effectively, requiring additional high-frequency speakers, which increase costs and complexity, and struggle with fine-grained sound quality due to weight and strength limitations of transmission media.
Innovation Solution
The exciter design features a voice coil bobbin mounted on the edge of an opening, allowing vibration transmission to a vibrating member, such as silk, to directly output high-frequency sounds without relying on additional speakers, and incorporates a sound absorber and damping member to suppress noise and enhance sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional exciters use transmission media to output sound, then the structure is simple, but high-frequency sound reproduction quality is poor due to weight and strength limitations
Solution Approach 1:
The patent merges the functions of conventional exciters and high-frequency speakers by integrating a vibrating member (silk dome) into the exciter structure. The voice coil bobbin serves dual purposes: as part of the exciter mechanism and as a mounting structure for the vibrating member, eliminating the need for separate high-frequency speaker components while achieving high-quality high-frequency sound reproduction
Solution Approach 2:
The voice coil bobbin is designed to perform multiple functions: it generates electromagnetic force for vibration, transmits vibration to the vibrating member, and serves as a mounting structure. The vibrating member itself functions both as a high-frequency sound radiator and as a heat dissipation component, demonstrating multi-functionality that reduces overall system complexity
2Reliability
If additional high-frequency speakers are added to improve high-frequency sound quality, then sound reproduction quality improves, but costs and device complexity increase
Solution Approach 1:
The patent combines the exciter and high-frequency speaker functions into a single integrated structure. The vibrating member (silk dome) mounted on the voice coil bobbin serves as both the exciter's vibration transmission element and the high-frequency speaker's diaphragm, eliminating the need for separate high-frequency speaker components
Solution Approach 2:
The voice coil bobbin and vibrating member serve multiple functions simultaneously: electromagnetic actuation, vibration generation, high-frequency sound radiation, and heat dissipation. This multi-functionality allows a single component structure to replace what would traditionally require multiple specialized components
3Reliability
If the voice coil bobbin is mounted on the frame edge with opening, then high-frequency sound output is enabled, but noise from frame surface increases
Solution Approach 1:
The patent extracts the noise-generating function from the frame structure by mounting the voice coil bobbin on the frame edge with an opening, separating the high-frequency vibration path from the frame body. The vibrating member is positioned to radiate sound away from the frame surface, preventing noise transmission
Solution Approach 2:
The voice coil bobbin and vibrating member act as intermediaries between the electromagnetic field and the air, enabling sound radiation without direct coupling to the frame. This intermediary structure prevents the frame from becoming a noise source while still allowing effective sound output
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 configuration enables high-quality reproduction of high-frequency sounds without the need for additional speakers, reducing costs and complexity, while improving sound quality and reducing noise from the frame surface.
Implementation Method 1
An acoustic signal is inputted to the voice coil 110. Due to the input of the acoustic signal, the voice coil bobbin 106 vibrates so as to vertically move toward the opening of the frame 104
Implementation Method 2
The voice coil bobbin 106 is mounted to the frame 104 through the damper 105. Thus, vibration generated by the voice coil 110 can be transmitted to the cone 108 without significantly reducing the vibration of the voice coil bobbin 106
Data Source
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AI summary
An exciter (1) includes a vibrator (2) including a yoke and a magnet, a frame (3) incorporating the vibrator (2) with a damper (4) therebetween, and a voice coil bobbin (5) disposed inside the frame (3) and having another end (5b) that extends to near the vibrator (2) and is provided with a voice coil (11). The frame (3) has an opening (3b), and the voice coil bobbin (5) is mounted on the edge of the opening (3b). One end (5a) of the voice coil bobbin (5) is opened to the outside of the frame (3). The voice coil bobbin (5) is provided with a vibrating member (10) that covers the opened portion.