Passenger Seat Arresting Device Segmentation
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Solution Overview
Problem
The existing passenger seat systems in transport vehicles, such as aircraft, face issues with short service life due to mechanical defects in spring-based arresting devices, which can render seats unusable and require tool-based reconfiguration, limiting quick adaptation and reliability.
Innovation Solution
A passenger seat system featuring a resiliently mounted arresting device with a spring force mechanism and an automatic locking unit, allowing for quick and tool-free reconfiguration, independent of spring function, using a traction mechanism and locking unit to ensure reliable seating even with defective springs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a spring-based arresting device is used to quickly fasten the seat frame to the carrier structure, then the ease of operation is improved, but the reliability deteriorates due to short service life of the spring
Solution Approach 1:
The arresting device is segmented into two independent functional components: a spring device for rapid actuation and a locking unit for secure retention. The spring device (with resilient element 32) provides quick movement of the arresting body 28, while the locking unit (with lever 42 and depression 50) independently ensures reliable fastening. This segmentation allows each component to be optimized for its specific function, resolving the contradiction between quick operation and long-term reliability.
Solution Approach 2:
The locking unit is designed to engage beforehand and hold the arresting body in the fastened position, providing a backup mechanism that compensates for potential spring failure. The lever 42 automatically engages with the depression 50 when the arresting body reaches its fastened position, ensuring that even if the spring 32 loses force over time, the seat remains securely fastened.
2Productivity
If a resiliently mounted arresting body is used for rapid fastening, then the productivity is improved, but the reliability deteriorates when mechanical defects occur in the spring
Solution Approach 1:
The system separates the rapid actuation function (spring device 32 moving arresting body 28) from the retention function (locking unit with lever 42 and depression 50). This allows the cabin to be quickly reconfigured by operating only the spring mechanism, while the locking unit independently ensures long-term reliability and prevents seat displacement even if the spring deteriorates.
Solution Approach 2:
The locking unit is designed to automatically engage and secure the arresting body without requiring additional energy or intervention. Once the spring device moves the arresting body into the fastened position, the lever 42 self-activates to lock it in place, providing automatic self-service that maintains productivity while enhancing reliability.
3Device complexity
If a spring-based arresting device is used, then the device complexity is reduced, but the reliability deteriorates due to spring wear and mechanical defects
Solution Approach 1:
The arresting device is divided into a simple spring mechanism (for actuation) and a separate locking unit (for retention). The spring mechanism remains mechanically simple with few moving parts, while the locking unit adds minimal complexity but provides substantial reliability improvement by independently securing the fastening.
Solution Approach 2:
The locking unit serves as a preventive backup that engages before spring failure can occur. The lever 42 is positioned to automatically catch and hold the arresting body 28 in its fastened position, cushioning against the eventual wear and mechanical defects that will affect the spring 32 over time.
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 enables reliable and quick seat reconfiguration without tools, extending service life by ensuring secure locking independent of spring functionality, thus enhancing operational efficiency and adaptability.
Implementation Method 1
The arresting device has an arresting body (28) which is mounted so as to be movable perpendicularly with respect to the carrier structure (12) and which is pushed by a spring device (32), by means of a spring force, into an arresting position
Data Source
AI summary
A passenger seat system) for a transport means has an elongate carrier structure, to be attached, fixedly with respect to a structure, mutually spaced-apart raster openings on the carrier structure top side, and a seat having a seat frame. The seat frame is displaceable and arrestable on the carrier structure, has a bottom side lying on the carrier structure, a top side holding a seat surface, an arresting device on the bottom side and an operating unit coupled to the arresting device, and movable into an arresting position and an unlocking position. The arresting device has an arresting body, mounted so as to be movable perpendicularly with respect to the carrier structure and pushed by a spring device, by a spring force, into an arresting position, and a locking unit for automatically holding the arresting body in the arresting position when the arresting body reaches the arresting position.