Latching Cam Handle Assembly for Double-Dense Blade Servers

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Solution Overview

Problem

There is a continuous pressure to increase computing density in datacenters by efficiently utilizing existing chassis and racks, which existing blade server designs struggle to achieve due to limitations in space and component integration.

Innovation Solution

A double-dense blade server design that combines two servers within the same form factor, utilizing a housing with pivotable and latched components to optimize space, electromagnetic compatibility, and airflow, while ensuring secure connections and robust shielding.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a double-dense blade server design is implemented to double computing density, then computing capacity per chassis is improved, but the complexity of the housing and latching mechanism increases

Engineering Contradiction:
Improvecomputing densityVSAvoidhousing complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The housing is divided into separate first and second housing portions that can be independently assembled and latched. This segmentation allows for simplified manufacturing and assembly of the complex double-dense configuration while maintaining the increased computing density capability.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

A latching mechanism serves as an intermediary component between the first and second housing portions, providing a standardized interface that simplifies the assembly process. The latching mechanism mediates the connection between the two housing portions, reducing the overall complexity despite the doubled computing density.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If the housing portions are made secure and tightly sealed for electromagnetic shielding, then electromagnetic compatibility is improved, but airflow for cooling becomes restricted

Engineering Contradiction:
Improveelectromagnetic interferenceVSAvoidcooling efficiency
Core Design Contradiction:
Object-affected harmful factorsVSTemperature

Solution Approach 1:

The housing design implements different sealing characteristics in different locations. Critical areas requiring electromagnetic shielding are tightly sealed, while designated airflow paths maintain adequate ventilation. This local differentiation of sealing quality allows simultaneous achievement of EMI protection and thermal management.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The housing portions are segmented with defined interface areas that can be selectively sealed. This segmentation allows the design to provide tight sealing where electromagnetic shielding is critical while maintaining open airflow paths for cooling, resolving the contradiction between shielding and ventilation.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS8976536B2Latching cam handle assembly for securing mated circuit boards
Publication Date: 2015.03.10 LENOVO GLOBAL TECHNOLOGIES SWITZERLAND INTERNATIONAL GMBH
  • US8976536B2 patent drawing
  • US8976536B2 patent drawing
  • US8976536B2 patent drawing

AI summary

An apparatus comprises a housing that includes a first housing portion and a second housing portion coupled at a first end. The apparatus further comprises a bulkhead secured to a second end of the second housing portion, and a handle pivotally secured to a second end of the first housing portion. The bulkhead includes a distally extending pin and a spring latch. The handle has a hole that is sized and positioned to selectively receive the distally extending pin and allow the handle to close only with the first and second housing portions in a closed position. The handle also has a hook that is captured by the spring latch in response to the handle being closed. A torsion spring may be used to bias the handle to an open position where the handle can be easily grabbed when the handle has not been latched.