Window Shade Actuating System Single Cord Control
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Solution Overview
Problem
Existing window shade actuating systems require users to operate two separate parts for lowering and raising the bottom part, resulting in a complex control system.
Innovation Solution
An actuating system for window shades that includes an axle coupling part, an arresting part, an arrester coupling part, a clutching part, and an actuating wheel, allowing for single-operating-element control to raise or lower the bottom part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If two separate parts are used for lowering and raising the bottom part, then the control function is achieved, but the device complexity increases
Solution Approach 1:
The patent combines the functions of lowering and raising the bottom part into a single operating element (the cord). By integrating the arresting part and clutching part mechanisms, one cord operation can either engage the clutch for lowering or disengage it for raising, eliminating the need for two separate control parts and simplifying the user interface while maintaining full control functionality
Solution Approach 2:
The single operating cord serves multiple functions: it can be pulled to lower the bottom part by engaging the clutch, pulled again to raise the bottom part by disengaging the clutch, and maintains the bottom part at intermediate positions through the arresting mechanism. This multi-functional design replaces what would traditionally require separate controls for each operation
2Ease of operation
If a single operating element is used to control both lowering and raising, then the ease of operation is improved, but the reliability of control may deteriorate
Solution Approach 1:
The patent introduces intermediate mechanical components (the clutching part and arresting part) that mediate between the single operating cord and the bottom part. These intermediaries ensure reliable control by providing distinct mechanical states: the clutching part reliably engages/disengages to control lowering/raising, while the arresting part provides positive stopping at desired positions, preventing accidental or incomplete operations
Solution Approach 2:
The control mechanism is segmented into functionally distinct components (arresting part, clutching part, coupling parts) that work together through the single cord. This segmentation allows each component to specialize in a specific function (stopping, engaging, disengaging) while being actuated by one cord, maintaining reliability through functional specialization rather than requiring multiple cords
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 simplifies operation by allowing the bottom part of the window shade to be lowered and raised with a single operating element, reducing complexity and enhancing user convenience.
Implementation Method 1
The actuating wheel being rotatable in a first direction to urge the clutching part to move from the retracted state to the extended state
Implementation Method 2
in a second direction opposite to the first direction to urge the clutching part to move from the extended state to the retracted state
Implementation Method 3
the arresting part having a braking state and a release state
Implementation Method 4
which can be transmitted to a drive axle so that the drive axle can rotate for winding a suspension cord connected with the bottom part
Data Source
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AI summary
An actuating system for a window shade includes an axle coupling part rotatable for raising or lowering a bottom part of a window shade, an arresting part and an arrester coupling part connected with each other, the arresting part having a braking state and a release state, a clutching part carried with the arrester coupling part and movable relative to the arrester coupling part between a retracted state where the clutching part is disengaged from the axle coupling part and an extended state where the clutching part is engaged with the axle coupling part, and an actuating wheel movably linked to the clutching part, the actuating wheel being rotatable in a first direction to urge the clutching part to move from the retracted state to the extended state, and in an opposite second direction to urge the clutching part to move from the extended state to the retracted state.