Aeronautical Display Fixing Bars for ARINC 739 Compatibility

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Solution Overview

Problem

Existing aeronautical equipment mounting standards, such as ARINC 739, restrict the maximum width of display screens due to the placement of central fixing screws, limiting the usable surface area when large displays are required.

Innovation Solution

The implementation of two removable mechanical bars under the long sides of the display screen, each equipped with quarter-turn screws for mounting to the instrument panel and simple screws for inter-bar fixation, allowing for a wider display configuration compatible with the ARINC 739 standard.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of moving object

If central fixing screws are used according to ARINC 739 standard, then mechanical compatibility with instrument panel is ensured, but display screen width is limited due to space occupied by screw heads

Engineering Contradiction:

Improvedisplay screen widthVSAvoidcompatibility with ARINC 739 standard

Core Design Contradiction:

Area of moving objectVSAdaptability or versatility

Solution Approach 1:

The fixing system is divided into two separate functional parts: (1) mechanical bars that interface with the instrument panel using ARINC 739 compliant screws, and (2) the display device that attaches to the bars. This segmentation allows the screws to be positioned at the bar ends rather than under the display, eliminating the space conflict and enabling full-width display screens while maintaining standard compatibility.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mechanical bars serve as an intermediary element between the instrument panel and the display device. They transfer the mechanical fixing function from the display area to the panel area, allowing the display screen to extend fully across the front face without being constrained by screw head space requirements.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Area of moving object

If display screen occupies maximum front face area, then useful surface area is maximized, but compatibility with standard fixing positions cannot be maintained

Engineering Contradiction:

Improveuseful surface areaVSAvoidalignment with standard fixing positions

Core Design Contradiction:

Area of moving objectVSManufacturing precision

Solution Approach 1:

By separating the fixing function into independent mechanical bars with integrated ARINC 739 screw positions, the display device can be manufactured with full front face utilization without compromising alignment precision. The bars are pre-configured with exact screw positions, ensuring accurate alignment when mounted to the instrument panel.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS9682663B2Mechanical fixing system for aeronautical display device

Publication Date: 2017.06.20 THALES SA

AI summary

The general field of the invention is that of the display devices comprising a rectangular display screen, said display device compatible with an aeronautical standard for mechanical interfacing with an instrument panel, said standard being defined by fixing positions and fixing means at said positions. The display device according to the invention comprises:two identical removable mechanical bars of a length equal to the length of the screen, each bar being arranged under one of the long sides of the screen, each bar comprising:first fixing means at said defined fixing positions, said first fixing means arranged so as to fix said bar on the instrument panel;two fixing holes, each fixing hole arranged at one of the ends of said bar,second fixing means making it possible to fix the display device in the four fixing holes of the two bars.