PCB Mounting Bracket with Scratch Protrusion for Grounding
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Solution Overview
Problem
The existing methods for mounting printed circuit boards (PCBs) in electronic devices, such as using screws, increase manufacturing costs and time due to the requirement for separate fastening tools and the complexity of the screw-fastening process.
Innovation Solution
An electronic device design featuring a mounting member with an interference portion and a scratch protrusion that interferes with an interference wall on the case, allowing for easy PCB mounting and improved grounding by removing a coating layer and contacting the conductive layer, thereby simplifying the attachment process and enhancing electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If screw fastening method is used to mount PCB to case, then reliable mechanical connection is achieved, but manufacturing cost increases due to separate fastening tools and manufacturing time increases due to screw fastening process
Solution Approach 1:
The mounting member integrates both the mounting function and grounding function into a single component. The interference portion provides mechanical connection while the scratch protrusion simultaneously creates grounding contact, eliminating the need for separate fastening operations and reducing manufacturing steps.
Solution Approach 2:
The scratch protrusion automatically scratches the coating layer and contacts the conductive layer during the insertion process itself. The act of mounting the PCB simultaneously creates the grounding path, eliminating the need for separate grounding operations or additional fastening tools.
2Reliability
If scratch protrusion penetrates coating layer to contact conductive layer, then grounding effectiveness is improved, but coating layer integrity is compromised
Solution Approach 1:
The scratch protrusion intentionally damages the coating layer to achieve grounding. The harmful effect of coating removal is converted into a beneficial grounding contact, as the exposed conductive layer provides the necessary electrical path for grounding the PCB to the case.
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 reduces manufacturing costs and time by simplifying the PCB mounting process while ensuring effective grounding of the PCB, enhancing the electronic device's performance and reliability.
Implementation Method 1
a scratch protrusion protruding from the interference portion and configured to scratch an outer surface of the interference wall in a state in which to the interference portion interferes with the interference wall
Data Source
AI summary
An electronic device includes: a printed circuit board on which an electronic component is mounted; a case comprising a board mounting portion, on which the printed circuit board is mounted, the board mounting portion comprising an interference wall; and a mounting member fixed to the printed circuit board and configured to fix the printed circuit board to the board mounting portion, the mounting member including an interference portion configured to interfere with the interference wall and a scratch protrusion protruding from the interference portion and configured to scratch an outer surface of the interference wall in a state in which to the interference portion interferes with the interference wall.