Spring Washer Sandwiched Between Flat Washers for Vibration Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Semiconductor devices, particularly those with power semiconductor elements like thyristors, face challenges in achieving reliable vibration resistance and secure attachment of external power supply and signal lines to control boards, leading to potential rattling and separation issues due to inadequate fixation methods.
Innovation Solution
The use of a semiconductor device design that incorporates a substrate with a spring washer sandwiched between flat washers, allowing a screw to be inserted through the substrate and washers to securely attach an attachment plate to the control board, providing elastic force to prevent rattling and ensure reliable electrical connection to the ground potential.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a screw is inserted through the substrate and attachment plate to fix the attachment plate, then the attachment plate can be secured to the control board, but the attachment plate may rattle or separate under vibration
Solution Approach 1:
A washer with elastic force is placed between the attachment plate and the substrate before the screw is fully tightened. This elastic washer acts as a cushioning element that maintains constant contact pressure between the attachment plate and substrate, preventing rattling and separation under vibration conditions while ensuring reliable electrical connection to ground potential
2Object-affected harmful factors
If the attachment plate is electrically connected to ground to block electric noise, then electrical interference is reduced, but the attachment plate must be securely fixed to maintain this connection
Solution Approach 1:
The elastic washer is positioned between the attachment plate and substrate to maintain constant contact pressure, ensuring that the electrical connection between the attachment plate and ground remains reliable even under vibration. This prevents loss of electrical contact while maintaining the noise-blocking function
Solution Approach 2:
The elastic washer serves as an intermediary element that simultaneously provides mechanical cushioning and maintains electrical contact. It mediates between the rigid attachment plate and substrate while ensuring continuous electrical connection to ground potential, blocking external electric noise effectively
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 design effectively prevents rattling and ensures secure attachment of the attachment plate, maintaining stable operation by blocking external electric noise and preventing damage to the control circuit elements, even under vibration, while minimizing the risk of electrical contact issues.
Implementation Method 1
An elastic washer having elastic force sandwiched between a first planar member and a second planar member
Data Source
AI summary
A spring washer sandwiched between flat washers is interposed between a land on one surface of a printed circuit board of a control board part and an attachment plate, and a screw is inserted from the other surface of the printed circuit board through a substrate through hole extending through the printed circuit board, one of the flat washers, the spring washer, and the other flat washer and is screwed into a screw hole formed in the attachment plate, thereby fixing the attachment plate to the printed circuit board.