Network Cabinet Retractable Hinge Pin Grounding

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Solution Overview

Problem

There is a need for network cabinets that provide easy access to internal components for cable connections and modifications while offering a less obtrusive grounding solution, along with features that enhance efficiency and convenience.

Innovation Solution

The network cabinet design includes a base frame with conductive components bonded together, featuring retractable hinge pins and spring-loaded hinge assemblies for easy door removal and grounding, along with adjustable equipment rails and cable management systems to facilitate efficient cable deployment and management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional grounding methods with separate grounding jumper wires are used, then grounding connections can be established, but the device complexity and installation time increase

Engineering Contradiction:
Improvegrounding connectionVSAvoidgrounding system
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The grounding function is merged with the hinge pin assembly. The hinge pin itself serves as the grounding conductor, eliminating the need for separate grounding jumper wires. This integration reduces the number of components and simplifies the grounding system while maintaining reliable electrical bonding between door and cabinet frame.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The hinge pin performs multiple functions: it provides the mechanical hinge function for door rotation and simultaneously serves as the grounding conductor for electrical bonding. This multi-functionality reduces the overall complexity of the system by eliminating redundant components.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Ease of operation

If retractable hinge pins are used, then door removal and installation become easier, but the hinge mechanism complexity increases

Engineering Contradiction:
Improvedoor removalVSAvoidhinge mechanism
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The hinge pin is designed to be retractable rather than fixed, allowing it to move between extended and retracted positions. This dynamic characteristic enables easy door removal when retracted and secure door attachment when extended, improving ease of operation despite the added mechanism complexity.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The hinge mechanism includes self-latching features that automatically secure the door when the hinge pin is extended, reducing the need for additional locking mechanisms or complex assembly procedures.

Inventive Principle:
Principle #25Self-service

3Reliability

If lever stops are added to prevent hinge pin retraction, then door safety is improved, but the hinge assembly complexity increases

Engineering Contradiction:
Improvedoor safetyVSAvoidhinge assembly
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

Lever stops are introduced as intermediary elements that mediate between the hinge lever and hinge pin. These stops prevent inadvertent retraction of the hinge pin by providing physical limits to lever movement, thereby enhancing door safety without requiring complex locking mechanisms.

Inventive Principle:
Principle #24Intermediary (Mediator)

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

This design allows for easy installation and modification of cable connections, provides a secure and efficient grounding system without the need for separate jumper wires, and enhances cable management, improving overall operational efficiency and convenience.

Implementation Method 1

retractable hinge pins and spring-loaded hinge assemblies for easy door removal and installation

Methodology Applied
Scientific EffectSpring-loaded mechanism: Spring

Implementation Method 2

base frame with conductive components bonded together

Methodology Applied
Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 3

internal tooth lock washers for secure bonding

Methodology Applied
Scientific EffectFriction: Friction

Data Source

PatentUS7781675B2Network cabinet
Publication Date: 2010.08.24 PANDUIT CORP
  • US7781675B2 patent drawing
  • US7781675B2 patent drawing
  • US7781675B2 patent drawing

AI summary

A network cabinet is provided comprising a door comprising first and second opposing lateral sides. A hinge lever is rotatably connected to the door and a retractable hinge pin is connected to the hinge lever and is positioned closer to the first lateral side of the door than the second lateral side. A lever stop is also connected to the door and is associated with the hinge lever. The lever stop prevents retraction of the hinge pin from an extended position with the second lateral side of the door in an open position.