Interface Card Fixing Device with Insulating Snap-Fit Clasp
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Solution Overview
Problem
Conventional screw locking structures for securing interface cards in mobile electronic devices like laptops are prone to causing short circuits and damage to electronic components due to loose screws or external forces, and are inconvenient to disassemble.
Innovation Solution
A fixing device with a holder base and clasp made of insulating plastic, featuring a buckle mechanism and elastic members to securely hold interface cards without screws, allowing easy assembly and disassembly while preventing short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a screw locking structure is used to secure the interface card, then the stability and reliability of the connection is improved, but the ease of operation deteriorates because manual tools are required for assembly and disassembly
Solution Approach 1:
The patent replaces the traditional screw locking mechanism with a snap-fit structure consisting of positioning blocks and elastic buckles. The elastic member provides automatic locking when the interface card is inserted, eliminating the need for manual screw tightening while maintaining secure connection. Disassembly is simplified to a single pushing motion on the operating portion.
Solution Approach 2:
The elastic member automatically engages with the positioning block to lock the interface card in place during insertion. The structure self-locks without requiring manual intervention, and the operating portion allows for easy self-release by the user through a simple pushing action.
2Reliability
If a screw locking structure is used to secure the interface card, then the reliability of the connection is improved, but the device complexity increases due to additional metal components
Solution Approach 1:
The patent employs composite material construction where the holder base, clasp, and positioning blocks are made from insulating plastic materials. This eliminates metal screws and reduces the need for additional metal fastening components, simplifying the overall structure while maintaining reliable electrical isolation and mechanical connection.
Solution Approach 2:
The positioning block and elastic buckle are integrated into a single molded plastic component. The elastic member is embedded within the holder base structure, combining multiple functional elements (positioning, locking, and insulation) into unified components rather than separate metal parts.
3Manufacturing precision
If metal screws are used to lock the interface card, then the positioning accuracy is improved, but the harmful factors increase due to potential short circuits and component damage
Solution Approach 1:
The holder base, positioning blocks, and clasp are constructed entirely from insulating plastic materials, eliminating all metal components that could cause short circuits. The insulating plastic provides both mechanical positioning accuracy and electrical isolation, simultaneously achieving precise positioning while eliminating harmful conductive effects.
Solution Approach 2:
The insulating plastic material acts as an intermediary between the metal interface card contacts and the circuit board, preventing direct metal-to-metal contact that could cause short circuits. The plastic maintains precise positioning while mediating electrical isolation.
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 fixing device provides stable and secure positioning of interface cards, preventing short circuits and damage, and enables quick installation and removal without the need for tools.
Implementation Method 1
an elastic member provided in the accommodating chamber with two ends respectively abutting an inner side of the vertical portion and the blocking wall
Data Source
AI summary
A fixing device includes a holder base having an accommodating chamber, two slideways, two side guide plates, a buckle groove and a blocking wall respectively formed on front and rear sides of the accommodating chamber, a positioning block formed above the buckle groove and a fixing unit provided at the bottom side, and a clasp having a pushing portion, an operating portion, a horizontal portion, a vertical portion and a connecting plate provided at the bottom side of the pushing portion, an elastic member set in the accommodating chamber and abutted against the vertical portion and the blocking wall, a pivot inserted through the connecting plate and the elastic member with two ends thereof positioned in the slideways and a buckle portion located at the front side of vertical portion and forced by the elastic member to engage with the buckle groove of the holder base.