Speaker Device Magnetic Circuit Volume and Vibration Unit Weight Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional speaker devices face challenges in maximizing the internal space utilization of the magnetic circuit unit and minimizing the weight of the vibration unit, leading to suboptimal performance in terms of force factor and sensitivity, especially in miniaturized audio equipment.
Innovation Solution
The speaker device incorporates an enhanced magnetic circuit unit with auxiliary diaphragms featuring avoiding grooves and notches on the first connecting portions, allowing the first magnetic portions to extend into these grooves, and utilizes flexible printed circuit boards and multiple permanent magnets to optimize the magnetic flux and reduce the weight of the vibration unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If the magnetic circuit unit is designed with conventional auxiliary magnetic bodies spaced from the first sides, then the magnetic circuit structure is simple, but the volume of the magnetic circuit unit cannot be maximized and the BL value is limited
Solution Approach 1:
The first magnetic portion is extended into the avoiding groove of the auxiliary diaphragm, nesting the magnetic circuit structure within the existing components. This allows the magnetic circuit unit to utilize the internal space of the speaker device more effectively, increasing the volume of the magnetic circuit unit without adding external dimensions
Solution Approach 2:
The magnetic circuit unit extends in the vertical direction into the avoiding groove, utilizing the third dimension (depth) rather than only horizontal expansion. This dimensional change allows maximum space utilization within the confined speaker device structure
2Weight of moving object
If the vibration unit is made compact to fit miniaturized equipment, then the device size is reduced, but the weight of the vibration unit cannot be effectively reduced, limiting sensitivity improvement
Solution Approach 1:
The avoiding groove is designed in the auxiliary diaphragm to create space for the first magnetic portion extension, effectively removing material from the vibration unit path. This extraction reduces the weight of the vibration unit while maintaining structural integrity and acoustic performance
3Volume of stationary object
If the first magnetic portion is extended into the avoiding groove, then the volume of the magnetic circuit unit is increased, but the holder structure becomes more complex requiring notches
Solution Approach 1:
The holder is segmented with notches at specific locations where the first magnetic portion extends into the avoiding groove. This segmentation allows the magnetic circuit unit to achieve maximum volume by accommodating the extended first magnetic portion, while the notches provide necessary space for the magnetic circuit configuration
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 increases the volume of the magnetic circuit unit, enhancing the BL value and sensitivity of the speaker device while reducing the weight of the vibration unit, thereby improving overall performance.
Implementation Method 1
a voice coil driving the diaphragm to vibrate and produce sound
Implementation Method 2
Each of the pair of the first sides is provided with an elastic support member; one end of each of the elastic support members is fixed to the frame, and another end of the elastic support member is fixed to the first connecting portion
Data Source
AI summary
The present disclosure provides speaker device. The speaker device includes frame, vibration unit and magnetic circuit unit, where vibration unit includes diaphragm, voice coil and holder; holder includes holder body and first connecting portion; voice coil includes pair of first sides and pair of second sides; first side is provided with elastic support member fixed to frame and fixed to first connecting portion; elastic support member and first side enclose an accommodating space; magnetic circuit unit includes main magnetic body and an auxiliary magnetic body; auxiliary magnetic body includes first magnetic portion that is respectively spaced apart from first side and located in accommodating space; elastic support member include an auxiliary diaphragm; auxiliary diaphragm is provided with an avoiding groove. The present disclosure can increase volume of magnetic circuit unit to increase BL value, and can effectively reduce weight of vibration unit to improve sensitivity.