Integrated Safety Enclosure and Lockout Mechanism for Optical Drives

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Solution Overview

Problem

Information handling systems face challenges in reducing size and weight while maintaining safety enclosures for components like optical drives, as separate housings add bulk and complexity, and existing solutions fail to ensure safe operation when disassembled.

Innovation Solution

The system integrates a safety enclosure for information handling system components into the main housing, using a lock out device to disable functions if the housing is disassembled, such as employing a Hall effect switch to prevent laser operation in optical drives when the housing is breached, and coupling hazardous components to inaccessible parts of the housing to prevent exposure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate component housings are used for safety enclosure, then safety standards are met, but size and weight of the information handling system increase

Engineering Contradiction:

Improvesafety enclosureVSAvoidsystem weight

Core Design Contradiction:

ReliabilityVSWeight of stationary object

Solution Approach 1:

The patent combines the safety enclosure function with the main system housing by integrating a lockout device into the housing structure. The housing itself becomes both the protective enclosure and the mechanism for ensuring safe operation, eliminating the need for separate component housings while maintaining safety standards.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The housing is designed to serve multiple functions simultaneously: it provides structural support, acts as the safety enclosure, and incorporates the lockout device to prevent operation when improperly assembled. This multi-functionality reduces overall system complexity and weight.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If separate component housings are used for safety enclosure, then safety standards are met, but device complexity increases

Engineering Contradiction:

Improvesafety enclosureVSAvoidhousing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the safety enclosure and lockout mechanisms into a single integrated housing structure. The housing includes both the enclosure and the lockout device with detection mechanisms, reducing the number of separate components and simplifying the overall device architecture.

Inventive Principle:

Principle #5Merging (Combining)

3Ease of repair

If component housing is removed for maintenance, then access is improved, but safety hazards may occur

Engineering Contradiction:

Improvecomponent accessVSAvoidlaser exposure

Core Design Contradiction:

Ease of repairVSObject-affected harmful factors

Solution Approach 1:

The lockout device prevents operation of hazardous components before maintenance can be performed. The detection mechanism identifies when the housing is improperly assembled or removed, and the lockout mechanism disables the component beforehand, preventing laser exposure or other hazards during maintenance access.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The detection mechanism provides feedback about the housing assembly state to the lockout device. When the housing is properly assembled, the component operates normally; when the housing is removed or improperly assembled, the feedback triggers the lockout mechanism to disable the component, preventing safety hazards.

Inventive Principle:

Principle #23Feedback

4Weight of stationary object

If smaller housing is used, then portability is improved, but thermal transfer becomes more difficult

Engineering Contradiction:

Improvesystem weightVSAvoidthermal transfer

Core Design Contradiction:

Weight of stationary objectVSTemperature

Solution Approach 1:

The patent incorporates thermal interface materials and thermally conductive structures within the compact housing design. These thin film materials enable efficient heat transfer from components to the housing and external environment, maintaining thermal performance despite the reduced size and weight of the system.

Inventive Principle:

Principle #30Flexible shells and thin films

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 approach reduces the size and weight of information handling systems by eliminating redundant enclosures and ensures safe operation by powering down hazardous components when the housing is removed, maintaining ANSI Class 1 safety standards.

Implementation Method 1

employing a Hall effect switch to prevent laser operation in optical drives when the housing is breached

Methodology Applied

Scientific EffectHall effect: Hall Effect

Data Source

PatentUS8330304B2System and method for assembly of component devices into an information handling system

Publication Date: 2012.12.11 DELL PROD LP

AI summary

An information handling system component contained within an information handling system housing uses the information handling system housing as at least a portion of a safety enclosure for hazardous functions of the component. A lock out device disables the hazardous function if the information handling system housing is moved relative to the component. For example, an optical disc drive laser is disabled if a Hall effect sensor in the chassis of the optical disc drive no longer senses a magnet placed in a portion of the information handling system housing used to enclose the optical disc drive. Alternatively, the component couples to the information handling system housing to enclose the hazardous function within the interior of the information handling system housing so that the component is inaccessible from the exterior of the housing.