Speaker PCB Layout With Extended Elastic Arm for Longer Life
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing speakers face limitations due to the short elastic arm of the printed circuit board, which fails to meet life requirements and compromises acoustic performance.
Innovation Solution
The speaker design includes a printed circuit board arranged on both sides of the speaker with a connecting portion extending towards the magnet assembly, featuring a configuration that increases the length of the elastic arm and includes auxiliary magnets to form an avoidance portion, thereby enhancing the elasticity and life of the printed circuit board while maintaining magnetic force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the printed circuit board is arranged at both ends of the speaker with a short elastic arm, then the space utilization is improved, but the life requirement of the printed circuit board cannot be met
Solution Approach 1:
The connecting portion of the printed circuit board extends in the direction of the magnet assembly (along the vibration direction of the diaphragm), utilizing the third dimension (depth direction) rather than only extending in the horizontal direction. This dimensional change allows the elastic arm length to be increased without increasing the overall footprint area of the speaker, thus resolving the contradiction between space utilization and reliability.
2Length of moving object
If the connecting portion of the printed circuit board is extended toward the magnet assembly, then the elastic arm length is increased, but the magnetic force value may be affected
Solution Approach 1:
The auxiliary magnets are strategically positioned only at specific locations where they provide magnetic support to the extended connecting portion of the printed circuit board, rather than uniformly distributing magnets throughout the entire structure. This localized magnetic field arrangement ensures that the extended elastic arm receives sufficient magnetic force support exactly where needed, maintaining the magnetic force value while enabling the length extension.
Solution Approach 2:
The auxiliary magnets act as intermediaries between the main magnet assembly and the extended connecting portion of the printed circuit board. These auxiliary magnets provide the necessary magnetic field support to the extended elastic arm, mediating the interaction between the electrical components and the magnetic circuit, thereby maintaining magnetic force integrity while allowing structural extension.
3Stability of the object's composition
If auxiliary magnets are added to support the extended printed circuit board, then the structural stability is improved, but the device complexity increases
Solution Approach 1:
The auxiliary magnets are integrated into the existing magnetic circuit system of the speaker, combining their structural support function with the acoustic magnetic field generation function. Rather than being separate standalone components, the auxiliary magnets are merged into the magnetic circuit architecture, sharing space and functional responsibilities, thus reducing overall device complexity while maintaining structural stability.
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 extended connecting portion of the printed circuit board enhances the elasticity and life of the printed circuit board, improving acoustic performance by maintaining the magnetic force value and increasing the displacement and sound pressure level of the diaphragm.
Implementation Method 1
a voice coil assembly at least partially located into the magnetic gap and driving the diaphragm to generate sounds
Implementation Method 2
The connecting portion extends toward a direction of the magnet assembly until a part of a projection of the connecting portion along a vibration direction of the diaphragm is located on the magnet assembly
Data Source
AI summary
The present invention provides a speaker includes a frame, a vibration system, and a magnetic circuit system. The vibration system includes a diaphragm, a voice coil assembly, and a printed circuit board. The printed circuit board is arranged on both sides of the speaker. The magnetic circuit system includes a magnetic bowl and a magnet assembly. The printed circuit board includes a first fixing portion mounted with the frame, a second fixing portion mounted with the voice coil assembly, and a connecting portion. The connecting portion extends toward a direction of the magnet assembly until a part of a projection of the connecting portion along a vibration direction of the diaphragm is located on the magnet assembly. The speaker can increase the length of the force arm under the premise of minimizing the loss of BL, and improve the acoustic performance of the product.