Power Supply Cage Switch Arms to Block Wrong-Size PSU Insertion

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Solution Overview

Problem

Existing power supply cages fail to prevent misalignment and cross-connections between power supply units with different widths and the connector pins of information handling systems, leading to potential short circuits.

Innovation Solution

A power supply system with switch arms and flex pins that transition between closed and open positions to ensure proper alignment of power supply units within the cage, preventing misalignment and cross-connections.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If power supply units with different widths are used in the cage, then versatility is improved, but misalignment and cross-connections between connector pins occur leading to short circuits

Engineering Contradiction:

Improvecompatibility with different power supply unit widthsVSAvoidelectrical connection safety

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The switch arms are designed to be movable between closed and open positions. When a power supply unit is inserted, the switch arms dynamically adjust their position based on the unit's width, automatically transitioning to the appropriate configuration to prevent misalignment while maintaining electrical connection safety.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The switch arms act as intermediary components between the power supply unit and the electrical connections. They mediate the interaction by physically blocking or allowing certain connections based on the power supply unit's dimensions, preventing direct misalignment between connector pins.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Manufacturing precision

If switch arms are added to the power supply cage, then alignment precision is improved, but device complexity increases

Engineering Contradiction:

Improvealignment precision of power supply unitsVSAvoidcage structure complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The switch arms are designed to automatically respond to the insertion of power supply units without requiring external control. The insertion action itself triggers the switch arms to transition to the appropriate position, making the system self-regulating and minimizing the need for additional control mechanisms.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The switch arms are positioned asymmetrically within the cage structure, with each arm located to optimize its blocking function for specific power supply unit widths. This asymmetric placement allows precise alignment control while using the minimum necessary structural elements.

Inventive Principle:

Principle #4Asymmetry

Data Source

PatentUS12524052B2Power supply unit cage with a double switch protection to prevent insertion of an improper sized power supply unit

Publication Date: 2026.01.13 DELL PROD LP

AI summary

A power supply system includes a power supply cage, a first switch arm, and a second switch arm. The first and second switch arms cross above the power supply cage. Each of the first and second switch arms includes a respective switch portion and a respective stopper portion. When an improper sized power supply unit is inserted within the power supply cage, the stopper portion of at least one of the first and second switch arms remain within the power supply cage. In this situation, the stopper portion prevents the power supply unit from being fully inserted within the power supply system when the power supply unit is the improper size.