Tool-Free Expansion Card Fixing Device with Sliding Rail
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Solution Overview
Problem
Conventional fixing methods for expansion cards in electronic devices using screws are inconvenient and occupy valuable space, as they require multiple fixing holes and tools, making it difficult to accommodate cards of varying sizes and reducing layout efficiency.
Innovation Solution
A fixing device comprising a supporting base with a sliding rail, a fastening element with a sliding and locking part, and an actuating element with a pressing and elastic part, allowing for tool-free, quick, and secure fixation of expansion cards of diverse sizes by sliding and locking mechanisms, reducing the need for multiple holes and optimizing space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screw-based fixing method is used, then expansion card can be securely fixed, but operating convenience deteriorates and layout space is reduced
Solution Approach 1:
The patent replaces the traditional screw-based mechanical fixing system with a spring-loaded clamp mechanism. The elastic component (spring) automatically applies clamping force to secure the expansion card, eliminating the need for screws, fixing holes, and manual tightening operations. This substitution maintains secure fixation while dramatically improving ease of operation.
2Adaptability or versatility
If multiple fixing holes are provided for different card sizes, then adaptability improves, but device complexity increases
Solution Approach 1:
The patent designs a universal fixing structure where the elastic component and clamp can accommodate multiple expansion card sizes (including different lengths and widths) through a single standardized interface. The clamp's elastic adjustment capability allows it to securely hold various card dimensions without requiring multiple specialized fixing holes or complex positioning structures on the circuit board.
Solution Approach 2:
The patent employs a dynamic elastic component that can automatically adjust its clamping force and position to fit different expansion card sizes. This dynamic adaptation eliminates the need for static, size-specific fixing holes, simplifying the circuit board layout while maintaining versatility across different card form factors.
3Reliability
If screw-based fixing is used, then reliable fixation is achieved, but productivity deteriorates due to time-consuming installation
Solution Approach 1:
The patent incorporates a pre-loaded spring mechanism that is预先 compressed or tensioned during assembly, storing elastic potential energy. When the expansion card is inserted, the spring automatically releases its stored energy to apply immediate clamping force, securing the card in place without requiring manual screw tightening. This preliminary action significantly accelerates the installation process while ensuring reliable fixation.
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 easy and rapid fixation of expansion cards without tools, improving user convenience and increasing space utilization in electronic devices by allowing direct placement on the supporting base and sliding rail, thus overcoming the limitations of traditional screw-based fixing methods.
Implementation Method 1
The actuating element includes a pressing part and an elastic part. The pressing part is connected with the sliding part through the elastic part.
Data Source
AI summary
A fixing device is provided for fixing an expansion card in an electronic device. The fixing device includes a supporting base, a fastening element and an actuating element. The supporting base includes a sliding rail. The sliding rail is located under the expansion card. The sliding rail includes plural first positioning structures. The fastening element includes a sliding part and a locking part. The sliding part is movably installed on the sliding rail. The locking part is protruded from the sliding part. The expansion card is arranged between the locking part and an expansion port of the electronic device. The actuating element includes a pressing part and an elastic part. The pressing part is connected with the sliding part through the elastic part. The pressing part includes a second positioning structure. The second positioning structure is detachably engaged with one of the plural first positioning structures.