Angled Aperture Plug-in Holder for Tool-Free Aircraft Component Locking

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Solution Overview

Problem

Existing plug-in holders for aircraft components require tool access for locking and unlocking, which is not always feasible, making the attachment process cumbersome.

Innovation Solution

The plug-in holder's opening is angled at an acute angle to the vertical, allowing the retaining bolt to be inserted and locked vertically, and automatically unlocked by pivoting into the central axis, simplifying the assembly and disassembly process without the need for tool access.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a tool attachment on the retaining bolt is used for locking and unlocking, then the component can be securely attached, but the tool must be easily accessible which is not always the case

Engineering Contradiction:
Improvesecure attachmentVSAvoidtool accessibility
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The retaining bolt is designed to be manually operable without tools by pivoting it about the second edge part. The bolt's own geometry (grooved end, wedge-shaped tip) enables it to lock and unlock automatically through user-applied force alone, eliminating the need for external tool attachments and making operation accessible in confined spaces.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

Instead of requiring a tool to rotate the bolt for locking/unlocking, the design inverts the approach by allowing the bolt to be directly manipulated through pivoting motion. The opening is angled obliquely so that the user can apply force to pivot the bolt about the second edge part, reversing the conventional tool-based rotation mechanism.

Inventive Principle:
Principle #13The other way round (Inversion)

2Ease of operation

If the retaining bolt is inserted in the central axis for disassembly, then automatic unlocking occurs, but the bolt cannot be locked in the vertical position

Engineering Contradiction:
Improveautomatic unlockingVSAvoidlocking capability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The opening has different functional zones: the first edge part (at the narrow end) provides support for locking when the bolt is in the vertical position, while the second edge part (opposite to the first) serves as the pivot point for unlocking when the bolt is pivoted into the central axis. This spatial differentiation of functions within the opening structure enables both locking and automatic unlocking capabilities.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The retaining bolt transitions between two dynamic states: locked position (vertical, supported on first edge part) and unlocked position (pivoted about second edge part into central axis). The spring element also dynamically transitions from deflected state during insertion to latched state in the groove, enabling automatic locking/unlocking based on the bolt's position.

Inventive Principle:
Principle #15Dynamics

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 design enables easy and tool-free locking and unlocking of the component, ensuring secure attachment and detachment without requiring accessible tool attachments, enhancing usability and reliability.

Implementation Method 1

the spring element can be deflected in the direction of insertion of the retaining bolt

Methodology Applied
Scientific EffectElasticity: Elasticity

Implementation Method 2

the retaining bolt can be pivoted about the second edge part into the central axis and then pulled out of the opening

Methodology Applied
Scientific EffectLever: Lever

Data Source

PatentEP2354570B1Connection holder for an upper fixing point of a suspended component
Publication Date: 2014.08.06 SFS INTEC HLDG AG
  • EP2354570B1 patent drawingFigure 1~4
  • EP2354570B1 patent drawingFigure 5
  • EP2354570B1 patent drawingFigure 6~9

AI summary

The mounting support (10) has a housing (20) with an aperture (22), where a component (14), mountable at a fixed structure (12), is formed with a groove at an end. The aperture is arranged diagonally in the housing under an acute angle (Beta). An assembly of the mountable component and a locking bolt (40) is swingable towards a middle axis (M) into the aperture.