Micro-speaker Contact Latch Mechanism for Space Saving
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional micro-speakers with elastic contacts face challenges in maintaining stable connections to external circuits while minimizing space and cost, as the soldering area required for metal contacts occupies valuable space and increases production costs.
Innovation Solution
The micro-speaker design incorporates contacts made by stamping and bending a metal plate with an elastic arm, where the soldering pad is insert-molded in the frame, eliminating the need for a soldering space and reducing manufacturing costs, and features a latch mechanism that secures the contact firmly without overlapping with the bending direction of the elastic arm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the contact is fixed to the lower surface of the frame by soldering, then the connection stability is improved, but the effective space of the frame is reduced and manufacturing cost increases
Solution Approach 1:
The patent extracts the soldering process and soldering area from the frame structure. The contact is fixed by pressing it into a cavity in the frame, eliminating the need for soldering holes and associated soldering areas on the frame's lower surface, thus recovering effective space.
Solution Approach 2:
The patent replaces the thermal-chemical joining method (soldering) with a mechanical joining method (pressing into cavity). This substitution eliminates the need for soldering areas while maintaining connection stability through mechanical engagement.
2Reliability
If the contact is fixed to the lower surface of the frame by soldering, then the connection stability is improved, but the manufacturing cost increases
Solution Approach 1:
The patent replaces the complex soldering process with a simpler mechanical pressing process. The contact is fixed by pressing it into a cavity, which is easier and cheaper to manufacture than soldering, while still ensuring stable electrical connection.
3Reliability
If the contact is made of metal sheet capable of elastic deformation, then the connection stability is improved, but the soldering area requirement increases
Solution Approach 1:
The patent extracts the soldering area requirement from the contact design. The metal sheet contact is fixed by pressing into a cavity rather than soldering, eliminating the need for dedicated soldering areas while maintaining the elastic deformation capability for stable connection.
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 ensures reliable electrical connection without occupying additional space, reduces manufacturing costs, and enhances the reliability of the contact by preventing soldering pad contact with the lower plate, thus addressing the space and cost issues of conventional designs.
Implementation Method 1
the contact is made of metal sheet capable of elastic deformation
Implementation Method 2
a voice coil 13 electrically connected to an external circuit (not shown), a diaphragm 14 driven by the voice coil 13
Data Source
AI summary
A micro-speaker is disclosed. The micro-speaker includes a frame, a magnetic circuit received in the frame, a voice coil partially received in the magnetic circuit, a diaphragm connected to the voice coil, and a contact fixed by the frame for electrically connecting the voice coil to an external circuit. The contact includes a base plate, a first and second connecting plates respectively connected to both ends of the base plate and formed an engaging space by connecting them in order. Corresponding to the contact, the frame includes a sidewall and a protrusion formed on the sidewall. The engaging space receives and engages with the sidewall and the second plating plate engages with the protrusion for mounting the contact on the frame firmly without soldering.