Airplane Cabin Window Shade Drive Mechanism
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Solution Overview
Problem
Existing aircraft window shading mechanisms lack stability and durability, requiring excessive effort for operation and often feature complex structures.
Innovation Solution
A drive mechanism utilizing a threaded spindle coupled with a transmission mechanism, including a gear system and a handle element, allows for low-effort operation with high stability, featuring a translational movement of the spindle and a parallel transmission rod for even power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional threaded spindle with rotational movement is used, then the structure is simple, but the stability and durability are insufficient
Solution Approach 1:
The invention transforms the traditional rotational movement of the threaded spindle into translational movement along the longitudinal axis. This dynamic change in movement type improves stability and durability while maintaining structural simplicity through the coupling of the spindle with the transmission mechanism.
Solution Approach 2:
The transmission mechanism acts as an intermediary between the threaded spindle and the lifting/lowering mechanisms. It converts the translational movement of the spindle into coordinated rotational movement of multiple drive wheels, enabling stable and durable operation without requiring direct rotational connection.
2Reliability
If a complex drive mechanism is used, then stability may improve, but the effort required for operation increases
Solution Approach 1:
The invention replaces complex mechanical linkages with a streamlined system where a single threaded spindle's translational movement directly drives the transmission mechanism. This substitution reduces operational effort while maintaining stability through the inherent mechanical advantage of the thread-gear interaction.
Solution Approach 2:
The invention changes the movement parameter of the threaded spindle from rotational to translational. This parameter change simplifies the actuation process, reducing the effort required while the gear transmission maintains the stability needed for reliable operation.
3Measurement precision
If separate mechanisms are used for each lifting and lowering operation, then control precision improves, but the device complexity increases
Solution Approach 1:
The invention merges multiple lifting and lowering mechanisms into a single integrated system driven by one threaded spindle. The transmission mechanism distributes the motion from this single source to multiple drive wheels, reducing overall complexity while maintaining synchronized control precision through the shared transmission path.
Solution Approach 2:
The single threaded spindle serves multiple functions by driving both lifting and lowering operations through the transmission mechanism. This universal actuator replaces what would traditionally require separate mechanisms, reducing complexity while maintaining the precision needed for controlled operation.
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 solution provides a stable, durable, and efficient shading mechanism that requires minimal effort for actuation, ensuring comfortable operation and longevity, with optional electric motor actuation for convenience.
Implementation Method 1
a threaded spindle (19) which can only be moved in a translatory manner
Implementation Method 2
a gear, in particular in the form of a single-stage spur gear, is provided between the threaded spindle and the transmission rod
Data Source
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AI summary
The invention relates to a modular airplane cabin window, having an exterior and an interior pane (1a, 1b) inserted in a substantially rectangular frame (2, 2', 3), having a foldable shade (4) disposed on the frame (2, 2'), wherein the shade has a freely displaceable end coupled to an actuating unit (5, 5') provided for the opening and closing of the shade (4), the actuating device having at least one lifting and lowering mechanism for the shade (4) disposed in one of the longitudinal parts (2c, 2'c) of the frame (2, 2') and a drive mechanism (9, 9') supported in a lower cross-piece (2b, 2'b) of the frame (2, 2'), wherein the mechanism comprises a threaded spindle (19, 19'). A particularly stable and durable design of the drive mechanism is obtained in that the threaded spindle (19, 19') can be displaced merely translationally and is coupled to a transmission mechanism, which actuates the at least one lifting and lowering mechanism.