Actuating Device Coupling Mechanism for Shading Systems
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Solution Overview
Problem
Existing actuating devices for shading systems face issues with unintentional detachment of partial structures, material fatigue, and the risk of high forces required for detachment, which can lead to injuries and malfunction.
Innovation Solution
The actuating device employs a dual coupling system with a first coupling device for enhanced locking and a second coupling device for a form-fitting connection, allowing high tensile forces to be transmitted without unintended separation, and a latching connection for low-force release, using rigid coupling elements to prevent material fatigue and ensure safe detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If flexible or elastic webs are used to connect the first partial structure and the second partial structure, then the connection can be detached by bending the webs apart, but this leads to material fatigue and material breakage
Solution Approach 1:
The connection system is divided into two separate coupling devices: a first coupling device for establishing and releasing the connection, and a second coupling device for providing a form-fitting connection during operation. This segmentation allows each device to have specialized functions - the first for controlled detachment and the second for secure locking - thereby eliminating material fatigue issues while maintaining ease of operation.
Solution Approach 2:
The patent transitions from using flexible/elastic materials to rigid coupling elements. The first coupling element and second coupling element are designed as rigid components that can still achieve controlled movement and detachment through mechanical leverage and geometric design, fundamentally changing the material parameter from flexible to rigid to eliminate fatigue.
2Reliability
If the first coupling element and the second coupling element are designed to be rigid, then material fatigue is reduced, but the risk of unintentional detachment increases
Solution Approach 1:
The patent combines two different coupling mechanisms into one system: the first coupling device (with first and second coupling elements) provides controlled detachable connection, while the second coupling device (with third and fourth coupling elements) provides form-fitting connection during operation. This merging allows rigid elements to work together - one for secure locking and another for controlled release - eliminating the trade-off between rigidity and stability.
Solution Approach 2:
The first coupling element is designed to be movable relative to the first partial structure, allowing it to pivot between a retracted position (where it engages the second coupling element) and a protruding position (where it can be detached). This dynamic design enables rigid elements to achieve both secure connection and controlled detachment without risking unintentional separation.
3Device complexity
If a single coupling device is used to connect the first partial structure and the second partial structure, then the device complexity is low, but the risk of unintentional detachment and material fatigue cannot be avoided
Solution Approach 1:
The connection system is divided into two separate coupling devices, each with specialized functions. The first coupling device handles establishment and release of connection, while the second coupling device provides form-fitting connection during operation. This segmentation increases complexity slightly but eliminates the fundamental flaws of a single-coupling design, providing both reliability and controlled operation.
Solution Approach 2:
The first coupling element serves multiple functions: it can be moved to a retracted position to engage the second coupling element for secure connection, and moved to a protruding position to allow detachment. This multi-functionality within the first coupling element, combined with the second coupling device, provides comprehensive solution that addresses both security and operability concerns.
4Force
If the first coupling element is moved to a retracted position to engage the second coupling element, then high tensile forces can be transmitted, but the ease of detachment is reduced
Solution Approach 1:
The first coupling element is designed as a movable component that can pivot between retracted and protruding positions. In the retracted position, it engages the second coupling element to transmit high tensile forces. For detachment, it can be moved to the protruding position where it clears the second coupling element, allowing easy release. This dynamic positioning resolves the contradiction between force transmission and ease of detachment.
Solution Approach 2:
The second coupling device (third and fourth coupling elements) provides a form-fitting connection that prevents unintentional detachment during normal operation with high tensile forces. This preliminary protective action ensures that even if the first coupling element is engaged, the connection cannot accidentally detach, while still allowing controlled detachment when needed.
Data Source
AI summary
The invention relates to an actuating device (10), in particular for a shading system, for actuation with a string element (44).In order to avoid, on the one hand, the risk of an unintentional detachment of a first substructure (12) from a second substructure (13) during intended use, and on the other hand to enable the detachment of the first substructure (12) from the second substructure (13) with the lowest possible forces to avoid injuries, the actuating device (10) is characterized in that a first coupling element (26, 27) in the release position is not engaged with a second coupling element (28, 29) and that, in the locking position, when the first coupling element (26, 27) interacts with the second coupling element (28, 29), detachment of the first substructure (12) from the second substructure (13) is prevented due to a positive locking connection between the first coupling element (26, 27) and the second coupling element (28, 29).