Circuit Card Retention Device Using Elastic Positioning Member
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Solution Overview
Problem
Conventional circuit card retention methods in computers are cumbersome and lack stability, as they rely on screws for fixing and positioning, making dismantling and assembling inconvenient and prone to instability.
Innovation Solution
A retention device featuring a positioning member with shaft members, projection bodies, and a flexible arc-shape strip that securely locks and positions the circuit card without screws, using a fixing board with through-slots and positioning holes to facilitate quick assembly and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If screwing is used to fix circuit cards, then the circuit card can be securely fixed, but the dismantling and assembling process becomes troublesome and inconvenient
Solution Approach 1:
The retention device is divided into separate components: a positioning member with pressing surfaces and an elastic member, and a circuit card with a positioning hole. This segmentation allows the device to be easily assembled by simply inserting the card into the hole, eliminating the need for screws while maintaining secure fixation through the elastic pressing mechanism.
Solution Approach 2:
The elastic member (spring) provides a dynamic pressing force that automatically adjusts to maintain secure contact between the positioning member and the circuit card. This dynamic mechanism ensures strong fixation without requiring manual screw tightening, and allows easy release by simply removing the card from the positioning hole.
2Ease of operation
If only a metallic board is screwed to fix interface cards or circuit cards, then the assembly process is simplified, but the positioning stability becomes insufficient
Solution Approach 1:
The positioning member concentrates the fixing function at a specific location (the positioning hole and pressing surfaces) rather than distributing it across a large metallic board. This localized design provides stable positioning through precise geometric fitting and elastic pressing force, eliminating the need for extensive metallic support structures while maintaining assembly simplicity.
3Strength
If conventional screwing methods are used, then secure fixation is achieved, but the device complexity increases due to additional components and assembly steps
Solution Approach 1:
The fixing function is merged into a single integrated positioning member that combines the positioning hole, pressing surfaces, and elastic member. This unified design replaces multiple separate components (screws, washers, mounting brackets) with one simple device that provides secure fixation through its inherent elastic pressing mechanism, significantly reducing device complexity.
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 robust and stable positioning of circuit cards, allowing for easy and convenient installation and removal without the need for screws, enhancing the overall assembly and disassembly process.
Implementation Method 1
an elastic member, such as a spring, is provided at the bottom of the positioning member
Data Source
AI summary
A retention device used in a circuit card of a computer is composed of a fixing board, an upper board surface of which is provided with a positioning hole having two ear parts at two sides; a positioning member, two sides of which are provided with shaft members which can be transfixed into shaft holes of the ear parts, and pressing surfaces at a lower part of which are pressed and in touch with a horizontal board surface of the fixing board. A projection piece which is extended from a metallic piece connected at a side of a circuit card is pressed by the positioning member which is rotated in the shaft holes with the shaft parts, to release the circuit card from being positioned and pressed, such that the circuit card can be easily taken out of the fixing board, thereby achieving a robustness in positioning the circuit card, along with a quick and convenient dismantling and assembling.