Half-Width Rack Latching Mechanism for One-Handed Removal

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Half-width rack-mountable devices face challenges in secure mounting and easy removal due to space constraints and the absence of large pull handles, requiring complex and expensive fasteners.

Innovation Solution

A latching mechanism with a fixed and movable portion, featuring angled grasping surfaces and a pivotable latch, allows for secure mounting and one-handed removal, utilizing stamped sheet metal for cost-effectiveness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If complex and expensive fasteners are used for secure mounting, then mounting reliability is improved, but manufacturing cost increases

Engineering Contradiction:

Improvemounting reliabilityVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The latching mechanism is divided into multiple functional components: a latch member with engagement features, a actuator member with releasing features, and a spring member. This segmentation allows each component to be manufactured separately using cost-effective stamping processes while maintaining reliable latching function through their coordinated interaction.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The spring member provides automatic engagement force to push the latch member into the engaged position with the mounting surface, eliminating the need for additional motors, sensors, or control systems. The mechanism self-actuates through mechanical spring force, reducing manufacturing complexity and cost while ensuring reliable mounting.

Inventive Principle:

Principle #25Self-service

2Ease of operation

If large pull handles are added for easy removal, then ease of operation is improved, but device width increases

Engineering Contradiction:

Improveease of removalVSAvoiddevice width

Core Design Contradiction:

Ease of operationVSLength of moving object

Solution Approach 1:

The actuator member serves dual functions: it acts as both the releasing mechanism for the latch and the pull handle for removal. The grasping surfaces on the actuator member provide easy one-handed engagement, while the same component mechanically disengages the latch when pulled. This merging eliminates the need for separate pull handles, maintaining a compact device width.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The actuator member is designed as a multi-functional component that provides: (1) a grasping interface for user interaction, (2) a mechanical lever to release the latch engagement, and (3) a pull handle for device removal. This universal design allows a single component to fulfill multiple operational needs without increasing overall device dimensions.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If a latching mechanism is implemented for secure mounting, then mounting reliability is improved, but device complexity increases

Engineering Contradiction:

Improvemounting reliabilityVSAvoidlatching mechanism complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The latching function is extracted as a dedicated, self-contained mechanism with clearly defined engagement and disengagement states. The latch member has specific engagement features that interface with the mounting surface, while the actuator member provides a simple grasping interface. This extraction creates a modular, understandable system that achieves reliable mounting without excessive complexity.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of requiring active force to maintain engagement, the mechanism uses passive spring force to maintain the engaged state, with the actuator requiring force only to release it. This inversion of the force requirement simplifies the user interaction model and reduces control complexity while ensuring reliable mounting through continuous spring pressure.

Inventive Principle:

Principle #13The other way round (Inversion)

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

The latching mechanism provides secure attachment and easy, one-handed removal of half-width devices, optimizing space usage and reducing manufacturing costs.

Implementation Method 1

a spring member biased toward the engaged position

Methodology Applied

Scientific EffectSpring: Spring

Implementation Method 2

The latch member is rotatable about a pivot axis parallel to the width dimension

Methodology Applied

Scientific EffectRotation:

Data Source

PatentUS20250338412A1Half-width rack device latching mechanism

Publication Date: 2025.10.30 HEWLETT PACKARD ENTERPRISE DEV LP

AI summary

A half-width rack-mountable information processing device comprises a chassis, information processing components, and a latching mechanism to secure the chassis in a half-width compartment of a mounting tray, which is attachable to a rack. The latching mechanism comprises a fixed portion comprising a first grasping surface, and a movable portion pivotably coupled to the fixed portion and comprising a latch and a second grasping surface. The second grasping surface is movable between a first extreme and a second extreme. In the first extreme, the first and second grasping surfaces are farthest apart and the latch is in a latching position. In the second extreme, the first and second grasping surfaces are closet together and the latch is in an unlatched position, The first and second grasping surfaces have, while in the second extreme, a positive non-zero angle therebetween.