Motorized Drive Pulley Integration for Blind and Window Actuation
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Solution Overview
Problem
Existing home automation systems with motorized drive devices for screens and windows are complex and costly due to the need for friction rings and sheaths, which complicate the connection between flexible elements and winding tubes.
Innovation Solution
A home automation system with a pulley integral to the winding tube, allowing the flexible element to wind and unwind, and an adaptation device for adjusting the starting position of the sash relative to the fixed frame, simplifying the connection and minimizing costs by using a common electromechanical actuator for both screen and sash movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a friction ring and sheath are used to connect the flexible element to the winding tube, then the connection is ensured, but the device complexity and cost increase
Solution Approach 1:
The patent removes the friction ring and sheath from the system by directly integrating the flexible element to the winding tube through a pulley mechanism. This extraction of unnecessary intermediate components simplifies the overall structure while maintaining the essential connection function.
Solution Approach 2:
The patent combines the winding tube and pulley into a single integrated component. The pulley is directly attached to the winding tube, eliminating the need for separate friction rings and sheaths to mediate the connection between the flexible element and the winding mechanism.
2Reliability
If a friction ring and sheath are used to connect the flexible element to the winding tube, then the connection is ensured, but the manufacturing cost increases
Solution Approach 1:
The patent removes the friction ring and sheath from the system by directly integrating the flexible element to the winding tube through a pulley mechanism. This extraction of unnecessary intermediate components simplifies the overall structure while maintaining the essential connection function.
Solution Approach 2:
The patent replaces expensive friction rings and sheaths with a simpler pulley-direct attachment mechanism. The flexible element is directly secured to the pulley using basic fastening methods, significantly reducing material and manufacturing costs while maintaining functional reliability.
3Device complexity
If the flexible element is directly connected to the winding tube without a pulley, then the structure is simpler, but the sash movement starting position cannot be adjusted
Solution Approach 1:
The pulley serves multiple functions: it guides the flexible element, provides a mounting point for adjustment mechanisms, and enables both screen winding and sash tilting operations. This multi-functional design achieves position adjustment capability without significantly increasing overall structural complexity.
Solution Approach 2:
The adaptation device allows the starting position of the sash movement to be pre-adjusted during installation or commissioning. This preliminary adjustment ensures proper operational alignment before the system enters regular use, accommodating different installation scenarios without requiring complex real-time adjustment mechanisms.
4Reliability
If separate actuators are used for screen and sash movement, then the functionality is more reliable, but the device complexity and cost increase
Solution Approach 1:
A single electromechanical actuator is designed to perform both screen winding and sash tilting functions. The actuator connects to both the pulley (for screen control via the flexible element) and the sash mechanism, enabling one component to reliably control multiple functions through different mechanical pathways.
Solution Approach 2:
The patent merges the control of screen and sash movements into a single electromechanical actuator system. By integrating both functions into one actuator, the system reduces component count and complexity while maintaining reliable control over both screen positioning and sash tilting operations.
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 simplifies the connection between flexible elements and winding tubes, reduces costs by eliminating the need for friction rings and sheaths, and allows independent adjustment of the sash movement, making the system more efficient and cost-effective.
Implementation Method 1
the flexible element is driven by the winding tube of the screen of the blackout device, itself driven in rotation by the electromechanical actuator
Data Source
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AI summary
A home automation system comprises a blind (3), a window (30), and a motorized drive (5). The motorized drive (5) is configured to roll up and down a screen (2) of the blind (3), and to tilt a sash (31) relative to a fixed frame of the window (30). When the sash (31) is closed by the motorized drive (5), a flexible element (24) is driven by a tube (4), which is itself rotated by an actuator.The motorized drive device (5) includes a pulley (25) fixed to the tube (4), around which the flexible element (24) is configured to wind and unwind, and an adaptation device (66) for a starting point of the movement of the opening (31) relative to the fixed frame, via the flexible element (24), when the screen (2) reaches the upper end position and the lower end position.