Spring-Loaded Fastening Assembly for PCB-to-Housing Contact
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Solution Overview
Problem
Existing fastening methods for circuit boards, such as using I-shaped nails, often result in gaps between the nail and the circuit board, leading to poor thermal and electrical conductivity between the circuit board and the housing.
Innovation Solution
A fastening device comprising a fixing member, a pressing member, a guiding member, and an elastic member, which works by aligning the second plate with the first plate and using the elastic member and guiding member to clamp the second plate between the fixing and pressing members, ensuring close contact and improved conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If I-shaped nails are used to fix the circuit board, then the installation process is simple, but gaps exist between the nail and the circuit board causing poor thermal and electrical conductivity
Solution Approach 1:
The fastening device is divided into multiple functional components: a pressing member for applying pressure, a guiding member for alignment, and an elastic member for maintaining contact force. This segmentation allows each component to perform its specific function optimally, ensuring both simple installation and good conductivity.
Solution Approach 2:
The pressing member acts as an intermediary between the fastening system and the circuit board, ensuring uniform pressure distribution and eliminating gaps. This intermediary component mediates the contact between the circuit board and the mounting surface, improving thermal and electrical conductivity while maintaining installation simplicity.
2Reliability
If a complex fastening structure is used to eliminate gaps, then thermal and electrical conductivity improves, but the device complexity increases
Solution Approach 1:
The elastic member is designed as a flexible component that can deform to accommodate slight variations in the circuit board surface while maintaining constant contact pressure. This flexibility eliminates the need for complex adjustment mechanisms, reducing device complexity while ensuring good thermal and electrical conductivity through consistent contact.
Solution Approach 2:
The fastening structure incorporates dynamic elements that allow automatic adjustment during installation. The elastic member dynamically adapts to the circuit board position, and the guiding member provides dynamic alignment, eliminating gaps without requiring complex pre-adjustment procedures or multiple components.
3Ease of operation
If the circuit board is not in close contact with the housing, then the installation is easier, but thermal and electrical conductivity deteriorates
Solution Approach 1:
The fastening device is designed to automatically ensure close contact between the circuit board and housing during installation. The elastic member self-adjusts to maintain optimal pressure, and the guiding member self-aligns the components, eliminating the need for complex manual adjustment while ensuring good thermal and electrical conductivity.
Solution Approach 2:
The guiding member performs preliminary alignment action before the pressing member applies the final contact pressure. This preliminary action ensures that the circuit board is properly positioned and aligned with the housing, making the subsequent installation process simple while guaranteeing close contact for optimal conductivity.
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 described fastening device enhances the connection stability and conductivity between the circuit board and the housing by ensuring close contact and improved mechanical engagement, thereby addressing the issues of gaps and poor conductivity in existing methods.
Implementation Method 1
an elastic member (60), wherein one end of the elastic member (60) is connected to a cavity wall (312) of the receiving cavity (31), and another end of the elastic member (60) is connected to the guiding member (50)
Data Source
AI summary
A fastening device can fix a first plate on a second plate, the first plate is defined a positioning hole. The fastening device includes a fixing member, a pressing member, a guiding member, and an elastic member. The guiding member is partially disposed in a receiving cavity of the fixing member and protruding from the fixing member to connect to the pressing member. The guiding member can extend through the positioning hole to cause the second plate to be disposed between the fixing member and the pressing member. The elastic member is disposed in the receiving cavity and resisting against the receiving cavity and the guiding member. The elastic member can drive the guiding member and the pressing member toward the first plate when the second plate moves between the pressing member and the fixing member. The present disclosure further provides a fixing assembly including the fastening device.