Tool-Less Cage Nut Fastener With Manual Lever-Arm Locking
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Solution Overview
Problem
Conventional cage nut fasteners require tools for installation and removal, making the process cumbersome and time-consuming, especially when large quantities are needed for electronic equipment racks and cabinets.
Innovation Solution
A cage nut fastener design featuring a spring cage with lever arms that can be compressed without tools, allowing for tool-free installation by manipulating the spring cage into a clamped position against a frame member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cage nut fasteners use a spring cage with outwardly-extending tabs, then the nut can be locked in place behind the aperture, but a separate tool is required to compress the spring cage for installation and removal
Solution Approach 1:
The lever arm is integrated as part of the cage arm structure, combining the compression function with the existing cage arm. This eliminates the need for a separate tool while maintaining the locking capability, as the lever arm itself can be manually compressed to install or remove the fastener
Solution Approach 2:
The lever arm is designed to be manually operable, allowing the user to directly compress and release the spring cage without external tools. The structure enables self-service installation and removal by utilizing the lever arm's mechanical advantage for easy manual operation
2Reliability
If conventional cage nut fasteners require a separate tool for installation, then the locking mechanism can be reliably activated, but the installation process becomes cumbersome and time-consuming
Solution Approach 1:
By integrating the lever arm into the cage arm structure, the system eliminates the need for separate tools and enables direct manual operation. This reduces installation time and increases productivity while maintaining reliable locking through the same spring cage mechanism
Solution Approach 2:
The lever arm provides dynamic control over the spring cage compression, allowing rapid installation and removal through simple manual motion. This dynamic mechanism enables faster operation compared to static tool-based systems
3Strength
If outwardly-extending tabs are used to lock the nut, then the fastener can be securely attached, but the structure requires additional complexity with multiple cage arms and tabs
Solution Approach 1:
The lever arm is merged with the cage arm structure, reducing the number of separate components. This integration maintains the fastening strength through the outwardly-extending tab while simplifying the overall device structure by eliminating redundant elements
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 efficient and rapid installation and removal of cage nut fasteners without the need for tools, reducing assembly time and relocation costs in electronic equipment setups.
Implementation Method 1
The spring cage is manipulated by the lever arm into a clamped position against the frame member
Data Source
AI summary
A method of installing a cage nut fastener against a frame member without the aid of tools includes: providing a cage nut fastener having a spring cage and a nut prevented from rotation within the spring cage, wherein the spring cage includes first and second lever arms arranged at opposite sides thereof, each lever arm extending in a rearward direction behind a back wall of the spring cage; applying a compression force upon at least one of the lever arms, without the aid of tools, to manipulate the spring cage to a compressed state; positioning a distal end of each of the lever arms through an aperture of the frame member; and releasing the compression force so that a portion of each of the lever arms presses against an edge of the aperture, thereby securing the cage nut fastener against the frame member.