Aircraft Overhead Bin Net Locking for Luggage Restraint
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Solution Overview
Problem
Aircraft overhead stowage bins pose a safety risk due to shifting luggage during flight, which can cause injuries from falling bags, especially during turbulence, and overloading that may lead to spontaneous bin opening.
Innovation Solution
An overhead stowage bin system featuring a net and locking mechanism integrated into the cabin door, with a spring mechanism and clip system to secure luggage, ensuring it remains restrained even during turbulence and preventing the bin from opening unexpectedly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If luggage is stowed in overhead bins without additional restraint, then the bin structure remains simple, but luggage shifts during flight causing safety hazards
Solution Approach 1:
The restraint system is segmented into multiple independent net panels that can be individually deployed and locked, rather than using a single complex restraint mechanism. Each net panel operates independently to secure specific sections of luggage.
Solution Approach 2:
The net system transitions from a static bin structure to a dynamic restraint system where nets can be deployed, retracted, and locked at different positions. The locking mechanism allows the system to adapt between different operational states (deployed/retracted) based on flight conditions.
2Object-affected harmful factors
If a net system is added to restrain luggage, then luggage shifting is prevented, but the bin structure becomes more complex
Solution Approach 1:
The net panels are nested within the bin structure when retracted, utilizing the existing bin volume. The nets roll up and store within the bin cavity, and the locking mechanism integrates with the existing door hinge structure, minimizing additional space requirements.
Solution Approach 2:
The restraint system uses flexible net panels instead of rigid structures. These thin film-like nets can conform to the bin geometry and luggage shapes, providing effective restraint without requiring bulky mechanical components or complex structural modifications.
3Reliability
If the net is made taut to prevent luggage movement, then restraint effectiveness increases, but stress on the bin structure increases
Solution Approach 1:
The locking mechanism applies tension locally at specific engagement points rather than distributing stress across the entire bin structure. The projections and recesses create localized anchor points that concentrate the restraining force where structurally appropriate, reducing overall stress on bin latches.
Solution Approach 2:
The net tension is dynamically adjusted through the locking mechanism that allows progressive engagement. The spring mechanism enables the net to be tensioned to the required level without over-stressing the structure, as the locking projections engage at optimal force levels.
4Reliability
If a locking mechanism is added to secure the net, then the net remains restrained during flight, but the system becomes more complex
Solution Approach 1:
The locking mechanism is designed to automatically engage and lock the net in place through spring-loaded projections that snap into corresponding recesses. The system self-regulates the locking action without requiring manual intervention or complex control systems, achieving reliable locking through simple mechanical means.
Solution Approach 2:
The locking mechanism replaces complex multi-component mechanical systems with simple projection-recess engagement. Instead of using motors, sensors, or electronic controls, the invention uses passive spring-loaded mechanical elements that automatically lock and unlock based on net tension and door position.
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 system effectively restricts luggage motion and prevents accidental opening of the bin, enhancing passenger and crew safety by maintaining the net's tension and securing luggage within the bin, reducing the risk of injuries and operational stress during flights.
Implementation Method 1
a spring mechanism and a locking mechanism integrated into the cabin door
Implementation Method 2
a biasing member disposed along the cabin door and operably coupled to the first projection such that the biasing member is configured to bias the first projection toward the second projection
Data Source
Figure 1
Figure 2
Figure 3A~3C
AI summary
An overhead stowage bin includes a ceiling panel (302), a back panel (304), a lower panel (306), and a plurality of side panels (305), a cabin door, a net, and a locking mechanism. The ceiling panel (302), the back panel (304), the lower panel (306), and the plurality of side panels (305) defining a volume configured to stow luggage. The cabin door is configured to enclose the volume and configured to rotate about a hinge disposed on the ceiling panel (302). The net is configured to extend along the cabin door in an extended position. The locking mechanism is configured to lock the net to the cabin door.