Speaker Frame Yoke Laser Welding Positioning
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Solution Overview
Problem
Existing speaker devices face issues with deformation and inaccurate positioning due to low-strength plastic frames and loose fixation of the magnetic circuit unit, leading to reliability concerns.
Innovation Solution
A speaker device design featuring a metal frame with extended fixing portions and yoke extensions that are laser-welded for stable assembly and positioning, ensuring accurate alignment and vibration space, while using a ring-shaped frame and yoke structure with fusion protrusions for secure connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the frame is made of low-strength plastic, then the manufacturing cost is reduced, but the frame is prone to deformation and the device reliability deteriorates
Solution Approach 1:
The patent uses a composite structure combining metal (yoke and frame fixing portions) and plastic (frame body) materials. The metal components provide high strength and rigidity for critical structural and magnetic functions, while the plastic frame body provides cost-effective housing and positioning features. This composite approach resolves the contradiction by achieving high reliability through metal reinforcement while maintaining manufacturing efficiency through plastic molding for the frame body.
2Device complexity
If the yoke and frame are fixed by gluing, then the assembly process is simplified, but the positioning accuracy is reduced and the connection reliability deteriorates
Solution Approach 1:
The patent replaces the chemical bonding method (gluing) with a mechanical connection system consisting of frame fixing portions with positioning features and corresponding recesses in the yoke. This mechanical interlocking provides precise positioning and reliable connection through physical engagement, eliminating the positioning errors and reliability issues associated with adhesive bonding while maintaining assembly simplicity through the integrated design of the fixing portions.
3Ease of operation
If the magnetic circuit unit is loosely fixed to the frame, then the assembly is easier, but the positioning accuracy is reduced and the sound quality deteriorates
Solution Approach 1:
The patent segments the frame into a frame body and separate frame fixing portions that are specifically designed for mounting the magnetic circuit unit. These fixing portions include integrated positioning features (protrusions and recesses) that ensure accurate positioning of the yoke and magnet assembly. This segmentation allows the magnetic circuit unit to be precisely positioned during assembly while maintaining ease of installation through the modular fixing structure.
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 design enhances the reliability and assembly stability of the speaker device by preventing deformation and ensuring accurate positioning of the magnetic circuit unit, resulting in improved sound quality and durability.
Implementation Method 1
A side of the at least one yoke extension portions away from the yoke side wall may be in contact with and fixed to the at least one frame fixing portion by laser welding.
Data Source
AI summary
A speaker device includes: a frame, a vibration unit and a magnetic circuit unit. The vibration unit includes a diaphragm and a voice coil. The magnetic circuit unit includes a yoke and a magnet. The yoke includes a yoke body, a yoke side wall and yoke extension portions protruding from the yoke side wall toward the frame. The magnet is fixed to the yoke body and is spaced apart from the yoke side wall to form a magnetic gap. The voice coil is inserted into the magnetic gap. The yoke side wall is fixed to the frame. The frame body includes a frame body having a ring shape, and frame fixing portions extending from the frame body toward the yoke side wall. The speaker device of the present disclosure can achieve a simple structure, high strength, easy assembly and positioning, and high reliability.