Quick Release Rack Bracket for Tool-Free Module Replacement

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Solution Overview

Problem

Centralized network systems face inefficiencies due to wasted resources and complex module replacement processes, including the need for disconnection of ground wires and multiple screws, which increases downtime and requires specialized tools and personnel for 1RU module replacement.

Innovation Solution

A quick release system with a grounding mechanism and thumb screws allows for easy and fast replacement of modules in a distributed network system, eliminating the need for ground wire removal and reducing the number of screws required, enabling quick online insertion and removal (OIR) of modules without disrupting the network.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional module replacement process is used with multiple screws and ground wire disconnection, then secure mechanical connection is achieved, but replacement time increases and requires specialized tools and personnel

Engineering Contradiction:
Improvemechanical connection securityVSAvoidmodule replacement time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The module replacement process is segmented into independent functions: mechanical attachment via brackets and thumb screws, electrical grounding via spring-loaded ground lugs, and cable management via velcro straps. This segmentation allows each function to be addressed independently, enabling quick release without compromising any individual function's effectiveness

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The ground lugs are pre-positioned on the rack brackets and spring-loaded to automatically engage with ground contacts on the module brackets when the module is installed. This preliminary positioning eliminates the need for manual ground wire connection during installation and simplifies removal by allowing the module to be detached before ground contact is broken

Inventive Principle:
Principle #10Preliminary action

2Reliability

If multiple screws and ground wires are used for module attachment, then reliable electrical grounding is achieved, but device complexity increases

Engineering Contradiction:
Improveelectrical groundingVSAvoidattachment mechanism complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The grounding function is extracted from the mechanical fastening system. Instead of integrating ground wires into the screw assembly, separate spring-loaded ground lugs are provided that independently handle electrical grounding. This extraction simplifies the overall attachment mechanism by separating mechanical and electrical functions

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The spring-loaded ground lugs automatically engage with ground contacts when the module brackets are attached to the rack brackets, and automatically disengage when the module is removed. This self-service mechanism eliminates the need for manual ground wire connection and disconnection, reducing complexity while maintaining reliable grounding

Inventive Principle:
Principle #25Self-service

3Reliability

If traditional fastening methods with multiple screws are used, then secure module mounting is achieved, but ease of operation decreases

Engineering Contradiction:
Improvemodule mounting securityVSAvoidmodule replacement ease
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

Traditional multi-screw fastening is replaced with a simplified mechanical system using thumb screws that can be operated by hand without tools, combined with spring-loaded ground lugs that automatically engage and disengage. This substitution maintains mounting security while dramatically improving ease of operation for non-specialized personnel

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS10932387B2Quick release for online insertion and removal of a module in a distributed network system
Publication Date: 2021.02.23 CISCO TECHNOLOGY INC
  • US10932387B2 patent drawing
  • US10932387B2 patent drawing
  • US10932387B2 patent drawing

AI summary

In one embodiment, as apparatus includes a quick release system for installation of a module of a network communications system in a rack and removal of the module from the rack, the quick release system comprising a rack bracket for attachment to the rack, the rack bracket comprising a ground lug for providing a ground connection, and a module bracket for attachment to the module, the module bracket comprising a thumb screw for securely connecting the module bracket to the rack bracket. A method for installing the module on the rack is also disclosed herein.