Side-Conduction Key Switch Assembly for Ultra-Thin PCB Connection
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Solution Overview
Problem
Conventional key switches are typically high in design to accommodate the extension of elastic portions, making them unsuitable for ultra-thin keyboards and industrial equipment, and are difficult to disassemble and replace.
Innovation Solution
A side conduction assembly for key switches that includes a PCB board with side conduction structures, featuring a housing, guide core, movable plate, and static plate, where the movable and static plates have support arms with bent portions that extend outside the housing for electrical connection to the PCB board, allowing for side conduction and reducing the overall height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the elastic portions are extended downwards to achieve electrical connection, then the electrical connection is achieved, but the overall height increases
Solution Approach 1:
The patent changes the conduction direction from vertical (downwards extension) to lateral (side extension). The support arms extend horizontally from the movable and static plates to contact the circuit board, transforming the electrical connection path from the vertical dimension to the lateral dimension, thereby reducing overall height while maintaining reliable electrical connection
2Ease of manufacture
If the key switch is made high to reserve space for elastic portions, then the elastic portions can function properly, but the product cannot be made ultra-thin
Solution Approach 1:
The patent relocates the elastic portion functionality to the lateral dimension through bent support arms that extend horizontally. This allows the key switch to maintain proper elastic function while achieving an ultra-thin vertical profile, as the critical conduction path now occurs in the horizontal plane rather than requiring vertical space
3Ease of manufacture
If the key switch components are directly provided on equipment, then the installation is simple, but disassembly and replacement are difficult
Solution Approach 1:
The patent divides the key switch into separable components: the housing assembly (containing movable plate, static plate, and guide core) and the circuit board. The support arms provide flexible electrical connection that allows the housing assembly to be detached from the circuit board, enabling easy disassembly and replacement while maintaining simple installation through the side-conduction interface
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 enables the production of ultra-thin key switches by reducing the overall height, facilitates easy disassembly and replacement of components, and improves the efficiency of contact and separation between the movable and static plates.
Implementation Method 1
The internal structure of the key switch is switched on and off by means of a change in the force of a metal elastic piece
Data Source
AI summary
The present utility model discloses a side conduction assembly for a key switch, comprising a PCB board and a plurality of side conduction structures fastened on the PCB board, wherein the side conduction structure comprises a housing, a guide core disposed on the housing, a movable plate disposed in the housing, and a static plate disposed in the housing; The utility model can conduct from the side to the external line, reduce the overall height, and implement an ultra-thin product.