Sounding Device Metal Bracket Laser Welding
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Solution Overview
Problem
The existing sounding devices in smart mobile devices face issues with deformation and low reliability due to the use of plastic positioning brackets and glue-based fixation of the magnetic circuit system, leading to poor positioning and stability.
Innovation Solution
A sounding device with a metal positioning bracket and a magnetic circuit system where the yoke has bending extensions that fit into slots on the bracket, ensuring accurate assembly and stability through laser welding, along with an elastic support component and framework for the diaphragm and voice coil, enhancing structural integrity and vibration reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a plastic positioning bracket is used, then the device can be manufactured with simple processes, but the bracket has low strength and is prone to deformation
Solution Approach 1:
The patent changes the material parameter of the positioning bracket from plastic to metal, fundamentally improving the strength and deformation resistance while maintaining manufacturing feasibility through standard metal forming and welding processes
Solution Approach 2:
The patent employs a composite structure combining metal positioning bracket with laser welding fixation, creating a hybrid assembly that leverages the high strength of metal materials while using advanced joining techniques to achieve both structural integrity and manufacturing efficiency
2Ease of manufacture
If the yoke is fixed to the positioning bracket by gluing, then the assembly process is simple, but the positioning accuracy deteriorates and reliability decreases
Solution Approach 1:
The patent replaces the chemical bonding mechanism of gluing with a mechanical fixation system consisting of positioning slots and corresponding positioning protrusions on the yoke, providing precise geometric positioning and stable mechanical connection
Solution Approach 2:
The patent introduces positioning slots as intermediary structural elements that mediate between the yoke and positioning bracket, enabling accurate alignment and stable fixation while maintaining assembly simplicity through the slot-protrusion interface
3Ease of manufacture
If the yoke and positioning bracket are fixed by gluing, then the assembly process is simple, but relative movement occurs during fixation reducing reliability
Solution Approach 1:
The patent replaces the unreliable glue fixation with a robust mechanical interlocking system where positioning protrusions fit into positioning slots, preventing relative movement and ensuring stable fixation throughout the device lifecycle
Solution Approach 2:
The patent segments the fixation function into distinct geometric features (positioning slots in the bracket, positioning protrusions on the yoke) that work together to provide stable connection, separating the positioning and fixation functions from the generic glue application process
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 solution provides a high-strength, reliable, and easily assembled sounding device with improved positioning accuracy and vibration stability, preventing deformation and ensuring consistent sound production.
Implementation Method 1
one side of one of the at least one yoke extension portion away from the yoke sidewall has a part in contact with the positioning bracket, wherein the part is welded to the positioning bracket by laser
Implementation Method 2
a voice coil configured to drive the diaphragm to vibrate
Implementation Method 3
a magnet received in the yoke
Implementation Method 4
an elastic support component elastically supporting the framework
Data Source
AI summary
A sounding device includes a positioning bracket, a vibration system including diaphragm and voice coil, and a magnetic circuit system including yoke fixed to the positioning bracket and magnet. The yoke includes yoke body fixed to the magnet, yoke sidewall bending and extending from periphery of the yoke body to the diaphragm, and yoke extension portion bending and extending from the yoke sidewall to the positioning bracket. The positioning bracket includes positioning bracket body and positioning slot formed by depression from one side of the positioning bracket body close to the yoke to the diaphragm. One side of the yoke extension portion close to the diaphragm abuts against a bottom surface of the positioning slot. One end of the yoke extension portion away from the yoke sidewall is fixed to the positioning bracket. The sounding device has a simple structure, high strength, easy assembly and positioning, and high reliability.