Motorized Window Functional Unit Segmented Anti-Pinch Control
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Solution Overview
Problem
Motor-driven components, such as window sashes, face challenges in reliable closure and sealing while maintaining anti-pinch protection, as existing safety measures can limit the closing force, compromising the heat-insulating effect.
Innovation Solution
A functional unit with a control device that deactivates safety functions during a specific section of the adjustment path, allowing the drive to apply maximum force for sealing engagement, while protecting against pinching by limiting the path where the safety function is active.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If safety functions are continuously active during the entire travel path, then anti-pinch protection is maintained, but the closing force is limited and sealing engagement is compromised
Solution Approach 1:
The travel path is segmented into a first section (where safety function is active) and a second section (where safety function is deactivated). This segmentation allows the system to apply different force levels in different phases of the closing operation, maintaining safety during the majority of the movement while enabling full force for sealing in the final phase.
Solution Approach 2:
The safety function's operational state is dynamically changed based on the position of the coupling element along the travel path. The control device automatically transitions the safety function from active to deactivated state when the coupling element enters the second section, allowing the drive to apply maximum force without compromising overall safety.
2Force
If safety functions are deactivated to allow maximum closing force, then sealing engagement is improved, but anti-pinch protection is compromised
Solution Approach 1:
The travel path is divided into distinct sections with different safety requirements. The second section, where maximum force is needed for sealing, is isolated as a small end section. This ensures that the safety function is only deactivated when the sash is already almost completely closed, minimizing the risk of pinching while enabling full force application.
Solution Approach 2:
The safety function remains active during the first section of the travel path, which covers the majority of the closing movement where pinching risk is highest. By the time the coupling element reaches the second section, the sash is already almost completely closed, and the preliminary protection during the first section has already mitigated most pinching risks.
3Force
If the safety function is deactivated during the end section of the travel path, then sealing engagement is improved, but the risk of pinching increases in that section
Solution Approach 1:
The safety function's activation state is localized to specific sections of the travel path rather than being uniformly applied. The second section, where the safety function is deactivated, is specifically characterized as an end section where the gap between sash and frame is minimal, making pinching inherently less risky. This local approach allows full force application precisely where needed for sealing.
Solution Approach 2:
The safety function is partially deactivated only during the minimal end section of the travel path rather than being completely deactivated throughout. This partial deactivation provides enough force for sealing while maintaining safety protection during the majority of the travel path where pinching risk is highest.
Data Source
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AI summary
The invention relates to a functional unit of a fitting for a structural member comprising a mounting frame and a wing, said functional unit comprising a base body and a coupling element that can be adjusted in relation thereto, the base body being designed to attach to the mounting frame, and the adjustable coupling element being coupled or couplable to the wing, or vice versa. The functional unit comprises a drive for the motor-driven adjustment of the coupling element over an adjusting distance in such a way that, in the mounted state of the functional unit, the wing coupled to the coupling element can be moved in the direction of the mounting frame, as well as a control device for controlling the drive, which is designed to provide at least one anti-pinch safety function. The control device is designed so as to provide the at least one safety function only over a first section of the adjusting distance, and conversely to deactivate it over a subsequent second section of the adjusting distance, in order to provide a contact pressure for a sealing engagement between the wing and the mounting frame.