Elastic Positioning Fastener for Vibration-Resistant Circuit Board Mounting
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Solution Overview
Problem
In notebook computers, the limited internal space restricts vertical assembly of the motherboard and interface card, leading to horizontal assembly with screws that can cause short circuits during disassembly or external vibrations.
Innovation Solution
A positioning fastener with a base, seat plate, fixing portion, and elastic positioning structure comprising an urging plate, pressing plate, and positioning member, made of insulating elastic material, allowing secure and detachable positioning of circuit boards or interface cards without causing short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a screw locking structure is used to secure the interface card, then the positioning stability is improved, but the ease of disassembly deteriorates and the risk of short circuit increases
Solution Approach 1:
The patent employs a dynamic snap-fit mechanism where the fastening structure transitions from a locked state to an unlocked state through elastic deformation. The circuit board's downward rotation squeezes the urging plate and pressing plate, causing elastic deformation that allows the board to pass through and be secured by the positioning member, enabling rapid assembly and disassembly without screws
Solution Approach 2:
The patent changes the physical state of the fastening structure by utilizing elastic deformation of the urging plate and pressing plate. These components are made of elastic material that can be compressed and deformed to accommodate the circuit board during insertion, then return to their original shape to secure the board, providing both stability and ease of operation
2Stability of the object's composition
If a metal screw is used for locking, then the positioning stability is improved, but the safety deteriorates due to risk of short circuit
Solution Approach 1:
The patent replaces the traditional metal screw with a disposable-like single-use fastening structure made of insulating elastic material. This structure is designed to be inserted once and remains in place, providing stable positioning without the risks associated with metal screws such as dropping or causing short circuits
Solution Approach 2:
The patent introduces an insulating elastic material as an intermediary between the circuit board and the positioning mechanism. This material serves as both the structural component for positioning and the insulating barrier that prevents short circuits, eliminating the need for metal fasteners
3Volume of moving object
If the internal space is limited, then the compactness is improved, but the assembly configuration flexibility deteriorates
Solution Approach 1:
The patent enables vertical assembly configuration within limited horizontal space by using a downward rotation motion in the vertical dimension. The circuit board rotates downward to be secured by the positioning member, allowing vertical stacking and compact arrangement while maintaining assembly flexibility
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 fastener provides a secure, detachable, and vibration-resistant solution for positioning circuit boards or interface cards, preventing electronic component damage from accidental drops or vibrations, ensuring safety and ease of assembly.
Implementation Method 1
the positioning fastener is formed of an insulating elastic material. When the positioning fastener is accidentally dropped on the electronic substrate or the circuit board, it will not cause short circuit or electronic component damage
Implementation Method 2
The urging plate and the pressing plate are squeezed backwards and elastically deformed by a circuit board that is rotated downward so that the circuit board passes the urging plate
Data Source
AI summary
A positioning fastener includes a base having a seat plate extended therefrom, a fixing portion disposed below the base for fastening to an electronic substrate, and an elastic positioning structure disposed above the base and including an urging plate, a pressing plate connected to the urging plate, a positioning space defined therein and a positioning member disposed at a bottom side thereof. The urging plate and the pressing plate are squeezed backwards and elastically deformed by a circuit board that is rotated downward so that the circuit board passes the urging plate and moves into the positioning space of the elastic positioning structure and a suspended board edge of the circuit board is secured in position by the positioning member. The pressing plate can be pressed by an external force to lift the urging plate, allowing the circuit board to be rotated in direction away from the positioning member.