Shield Can Fastening Structure for PCB Alignment
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Solution Overview
Problem
The misalignment or displacement of shield cans on printed circuit boards leads to coupling deviations, causing electromagnetic interference (EMI) and malfunctioning of electronic components, as existing fastening structures fail to securely mount the shield cans.
Innovation Solution
The use of first fastening structures with a specific width and second fastening structures extending from them, having a smaller width, along with guide portions or coupling portions, ensures precise positioning and secure mounting of the shield can through thermal treatment with solder cream, preventing misalignment and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shield can is mounted on a printed circuit board using conventional fastening structures, then the shield can can be attached to the board, but the shield can may become misaligned or displaced, causing coupling deviations and electromagnetic interference
Solution Approach 1:
The patent applies preliminary action by incorporating guide portions on the circuit board that pre-establish the correct positioning path and final position for the shield can. These guide portions are formed in advance during PCB manufacturing, ensuring that when the shield can is mounted, it automatically aligns with the predetermined accurate position, preventing misalignment and subsequent electromagnetic interference.
Solution Approach 2:
The patent uses guide portions as an intermediary element between the circuit board and the shield can. These guide portions act as a mediating structure that facilitates precise coupling by providing physical guidance and constraint, ensuring the shield can is positioned accurately relative to the circuit board without direct reliance on the fastening structures alone.
2Manufacturing precision
If the shield can is securely mounted to prevent misalignment, then mounting accuracy improves, but the fastening structure becomes more complex
Solution Approach 1:
The patent applies segmentation by dividing the fastening function into two distinct components: guide portions (which provide positioning and alignment) and fastening structures (which provide mechanical attachment). This segmentation allows each component to specialize in its specific function, achieving high coupling accuracy through the guide portions while keeping the fastening structures relatively simple and straightforward.
Solution Approach 2:
The guide portions serve multiple functions simultaneously: they provide mechanical guidance for alignment, define the final positioning of the shield can, and work in conjunction with the fastening structures to achieve secure mounting. This multi-functionality reduces the need for additional specialized components, thereby simplifying the overall fastening structure while maintaining high coupling accuracy.
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 solution ensures precise and secure coupling of the shield can to the circuit board, reducing EMI and component malfunctions by maintaining accurate alignment and preventing interference with adjacent components.
Implementation Method 1
thermal treatment with solder cream
Data Source
AI summary
An electronic device and shield can structure are provided. The electronic device includes a housing, a circuit board disposed in the housing and one or more electronic components mounted on the circuit board, a shield can coupled to the circuit board and covering the one or more electronic components, one or more first fastening structures disposed on the circuit board and coupled to the shield can, the one or more first fastening structures having a first width, and one or more second fastening structures extending from the one or more first fastening structures, the one or more second fastening structures having a second width smaller than the first width.