Resilient Spring Snaps for Solder-Free Circuit Board Shield Attachment
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Solution Overview
Problem
Existing shield technologies for electrical circuit boards often require adhesive or solder for attachment, which can damage the board and complicate assembly, and fail to effectively block electromagnetic interference.
Innovation Solution
A cover shield with resilient spring snaps that frictionally engage with a circuit board's edges through barbed tabs and notches, providing tension and compression forces without adhesives or solder, ensuring secure attachment and electromagnetic shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive or solder is used to attach the shield to the circuit board, then the attachment strength is improved, but the circuit board may be damaged and assembly complexity increases
Solution Approach 1:
The patent replaces chemical bonding methods (adhesive) and thermal/electrical bonding (solder) with a mechanical snap-fit system. The shield includes resilient spring snaps that engage with corresponding features on the circuit board, providing secure attachment through elastic deformation and mechanical interlocking without damaging the board.
Solution Approach 2:
The patent utilizes changes in the elastic properties of the spring snaps to achieve attachment. The resilient nature of the springs allows them to deform during installation and maintain constant contact force, adapting to manufacturing tolerances and board flexing while maintaining secure attachment.
2Reliability
If adhesive or solder is used to attach the shield, then attachment is achieved, but assembly complexity and production time increase
Solution Approach 1:
The spring snaps are self-aligning and self-adjusting components that automatically find their engagement position and maintain optimal contact force. This eliminates the need for precise alignment procedures or additional fastening steps, allowing operators to simply snap the shield into place without specialized training or equipment.
Solution Approach 2:
The resilient spring snaps provide dynamic attachment that can accommodate board flexing, thermal expansion, and manufacturing variations. The springs continuously adjust their force to maintain secure engagement under varying conditions, ensuring reliable attachment without requiring overly tight tolerances or multiple fastening operations.
3Object-affected harmful factors
If traditional shielding methods are used, then electromagnetic interference blocking is achieved, but the attachment method causes board damage and assembly complications
Solution Approach 1:
The patent combines the electromagnetic shielding function with the attachment function into a single integrated component. The spring snaps are built into the shield structure itself, eliminating the need for separate mounting hardware and reducing the number of assembly steps while maintaining both shielding effectiveness and secure attachment.
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 allows for secure, solder-free attachment of the cover shield to circuit boards, reducing assembly complexity and electromagnetic interference, while maintaining stability under dynamic loads, thus enhancing production efficiency and protecting sensitive circuitry.
Implementation Method 1
the barbed tab frictionally engages the second side of the circuit board, causing a tension force on the barbed tab
Implementation Method 2
simultaneously causing a compression force between a spring member and the first side of the circuit board
Data Source
AI summary
A cover shield for a circuit board having a body. A peripheral wall is disposed about an edge of the body. First and second slots each include a first portion that extends through the body and a second portion that extends through the peripheral wall. A barbed tab is disposed between the first and second slots. A notch extends through a portion of the barbed tab. A distinct abutting member is disposed on the peripheral wall.