Sound Generating Device Coil Lead Wire Elimination
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Solution Overview
Problem
The existing sound generating devices in mobile devices face issues with reliability due to the risk of broken coil lead wires and limited diaphragm suppression, leading to instability and poor acoustic performance.
Innovation Solution
The sound generating device incorporates a magnetic system with a yoke, primary and secondary magnets, and a coil suspended in a magnetic gap, along with insulating edges made of silica gel that provide support to the coil, preventing lateral swing and using conductive pads to replace coil lead wires, enhancing stability and acoustic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If five magnets are used in the magnetic system, then the magnetic driving force is improved, but the space for lead wire leads is reduced and the risk of broken lead wires increases
Solution Approach 1:
The patent extracts and removes the coil lead wires from the system, replacing them with a conductive coil structure that is directly formed on the diaphragm. This eliminates the lead wires that were causing reliability issues while maintaining the magnetic driving force provided by the five-magnet system.
Solution Approach 2:
The patent replaces the mechanical lead wire connection system with an integrated conductive coil structure. The coil is directly formed on the diaphragm surface, substituting the traditional mechanical wiring system with a more reliable integrated electrical connection that eliminates the risk of lead wire breakage.
2Device complexity
If the lead wire space is reduced to accommodate five magnets, then the magnetic system compactness is improved, but the risk of broken lead wires increases
Solution Approach 1:
The patent merges the coil structure with the diaphragm by directly forming the conductive coil on the diaphragm surface. This integration combines two previously separate components (coil and diaphragm) into a unified structure, eliminating the need for separate lead wires and improving reliability while maintaining compactness.
Solution Approach 2:
The patent removes the lead wires from the system entirely, extracting the problematic component that caused reliability issues. The electrical connection is achieved through the integrated coil structure on the diaphragm, eliminating the need for separate wiring that would require space and pose breakage risks.
3Device complexity
If the diaphragm suppression structure is limited, then the device simplicity is improved, but the vibrating system stability deteriorates
Solution Approach 1:
The patent introduces a dynamic suppression mechanism where the conductive coil on the diaphragm surface interacts with the magnetic field to provide electromagnetic damping. This dynamic suppression stabilizes the vibrating system during operation while maintaining structural simplicity, as the suppression effect is achieved through the interaction of the integrated coil with the magnetic field rather than additional mechanical constraints.
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 improves the stability and acoustic performance of the sound generating device by preventing coil breakage and increasing the effective vibration space, resulting in enhanced reliability and sound quality.
Implementation Method 1
the coil 22 generates an electromagnetic field together with the magnetic system 3 after being connected to an external power source through the terminal 4
Implementation Method 2
the coil 22 can reciprocate to drive the diaphragm 21 to vibrate and generate sound
Implementation Method 3
the coil 22 generates an electromagnetic field together with the magnetic system 3... so that the coil 22 can reciprocate
Implementation Method 4
the diaphragm 21 to vibrate and generate sound
Data Source
AI summary
A sound generating device is provided in the present disclosure. The device includes a frame, a vibrating system, a magnetic system, a terminal fixed to the frame, a edge and a conductive pad. The vibrating system includes a diaphragm and a coil driving the vibration of the diaphragm, and the coil is electrically connected with the terminal. The magnetic circuit system includes a yoke, the main magnet and two sub-magnets at the opposite sides of the main magnet are separately made of the insulating material and respectively set on the opposite sides of the main magnet. The conductive pad is embedded in the edge, and the two edges are interlaced at interlaced intervals with the two sub magnets. The side of the edge is connected to the insulation of the frame, and the other side of the edge is insulated and fixed with the one end of the diaphragm which is far away from the coil, and the coil and the terminal are electrically connected with the conductive pad. Compared with the related technology, the sound generating device of the invention has good reliability and excellent acoustical performance.