PCB Grounding Clamp Structure for Fast Casing Assembly
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Solution Overview
Problem
Conventional electronic devices face high costs and time-consuming assembly processes for grounding circuit boards to metal casings, often requiring screws, riveting fixtures, or elastic sheets that can lead to material fatigue and increased complexity, with no effective positioning of the circuit board.
Innovation Solution
An electronic device with a circuit board featuring perforations and ground wires, and a clamping structure on the casing with first and second clamping parts that penetrate through the perforations to position and ground the circuit board, allowing for rapid assembly and reducing material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screws or riveting fixtures are used to ground the circuit board to the metal casing, then grounding is achieved, but the assembly process becomes time-consuming and costly
Solution Approach 1:
The patent combines the grounding function with the positioning function into a single integrated clamping structure. The clamping structure includes clamping portions that contact the ground wire and positioning portions that locate the circuit board, eliminating the need for separate screws, rivets, and positioning devices. This merging of functions achieves both reliable grounding and rapid assembly simultaneously.
Solution Approach 2:
The clamping structure serves multiple functions: it clamps the ground wire to establish electrical connection, positions the circuit board through integrated positioning portions, and provides mechanical support. This multi-functional design replaces multiple separate components (screws, rivets, positioning devices) with a single universal component, improving both reliability and assembly speed.
2Productivity
If elastic sheets are used for grounding, then assembly is simplified, but the material is prone to elastic fatigue causing loosening
Solution Approach 1:
The patent avoids using elastic materials that are prone to fatigue by employing a rigid clamping structure made of metal or other durable materials. The clamping portions maintain constant contact pressure through their rigid structure rather than relying on elastic deformation, eliminating the problem of loosening over time while keeping the assembly process simple and fast.
3Manufacturing precision
If separate positioning devices are added to position the circuit board, then positioning is achieved, but the cost and assembly complexity increase
Solution Approach 1:
The positioning portions are integrated directly into the clamping structure, combining positioning and clamping functions in a single component. The positioning portions extend from the clamping structure and engage with corresponding features on the circuit board, providing accurate positioning without requiring separate positioning devices, thereby reducing structural complexity while maintaining positioning 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
Enables rapid grounding and positioning of the circuit board, reducing assembly time and costs while preventing component damage, with the clamping structure formed from bent metal materials for cost and material efficiency.
Implementation Method 1
The at least one clamping structure of the casing penetrates through the plate body through the at least one perforation, so that the circuit board is positioned on the casing
Implementation Method 2
The at least one ground wire is electrically coupled with the plate body, and is disposed on and crosses over the at least one perforation
Data Source
AI summary
An electronic device is provided and includes a circuit board and a casing. The circuit board includes a plate body, a perforation and a ground wire. The perforation penetrates through the plate body, the ground wire is electrically coupled with the plate body and crosses over the perforation. The casing includes a bottom plate and a clamping structure. The clamping structure is disposed on the bottom plate and includes a first clamping part and a second clamping part. The circuit board is disposed in the casing, and the clamping structure penetrates through the plate body through the perforation, so that the circuit board is positioned on the casing, and the ground wire is clamped by the first clamping part and the second clamping part of the clamping structure. Consequently, the circuit board is grounded with the casing.