Grounding Structure for Circuit Board Anti-Rotation Design
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Solution Overview
Problem
Conventional grounding structures for circuit boards face issues with incomplete earth connections due to insufficient torque force and interference with adjacent components, especially in miniaturized devices where space is limited, leading to potential electric shocks or discharges.
Innovation Solution
A grounding structure featuring a plate-shaped connection member with protruding portions that prevent rotation during screw fastening, ensuring secure earth connections without interfering with adjacent components, by having a protruding length smaller than the circuit board thickness and multiple engagement points with the circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the protruding length of the connection member is increased to prevent rotation during fastening, then the rotation prevention function is improved, but the connection member interferes with adjacent components (earth member, bracket) disposed on the back side of the circuit board
Solution Approach 1:
The connection member is designed with a plate-shaped configuration that engages with the circuit board in a different dimensional approach. The plate shape provides rotational stability through its geometry while keeping the protruding length controlled to avoid interference with components on the opposite side of the board.
Solution Approach 2:
The connection member features an asymmetric plate shape with specific geometric characteristics that provide inherent anti-rotation capability. The asymmetric design allows the member to engage with the circuit board in a way that prevents rotation without requiring excessive protruding length, thus avoiding interference with adjacent components.
2Ease of manufacture
If conventional round crimped terminals are used for earth connection, then the manufacturing process is simple, but the screw may be driven obliquely or incompletely fastened due to insufficient torque force, resulting in incomplete grounding
Solution Approach 1:
The earth connection system is segmented into distinct functional components: the plate-shaped connection member for mechanical stability and positioning, the screw for electrical connection and fastening, and the earth member for grounding. This segmentation allows each component to perform its specific function effectively, ensuring both ease of manufacture and reliable grounding.
Solution Approach 2:
The plate-shaped connection member provides self-positioning and self-stabilization capabilities through its geometry. The member automatically resists rotation and maintains proper alignment during the fastening process, reducing the skill level required for installation and ensuring consistent, complete grounding without requiring excessive torque or precise manual positioning.
Data Source
AI summary
Since a protruding portion preventing a rotation during screw fastening of a connection member is disposed to engage with a printed circuit board, and a protruded length of the protruding portion is smaller than a thickness of the printed circuit board, a configuration can be achieved such that the protruding portion does not interfere with an earth member, a bracket, etc., disposed on the back side of the printed circuit board, and the earth member and the bracket can freely be designed.