Pivot Window Screen Hinge with Self-Locking Curved Surfaces
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Solution Overview
Problem
Existing pivot window screening devices require complex and time-consuming installation processes, often necessitating separate fastening means and angle adjustments that are not aesthetically or practically feasible, especially when used with pivot windows where the entire top element cannot pivot.
Innovation Solution
A screening device with a hinge connection system featuring mutually cooperating engagement surfaces that allow positive engagement within a predefined angle interval, eliminating the need for supplemental fastening means and enabling easy installation and detachment by adjusting the angle of the side rails and top element hinge parts, along with an optional stay element for added security against unintentional release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate fastening means are used to secure the hinge connection, then the reliability of the connection is improved, but the device complexity and installation time increase
Solution Approach 1:
The hinge parts are designed to automatically engage and secure themselves through the interaction of the curved engagement surface and planar bearing surface, eliminating the need for separate fastening means. The geometry of the surfaces ensures reliable connection while simplifying installation to a simple engagement process.
2Reliability
If multiple hinge parts with complex engagement mechanisms are used, then the reliability of the hinge connection is improved, but the ease of operation during installation deteriorates
Solution Approach 1:
The hinge parts automatically secure themselves through the geometric interaction of their engagement surfaces. The curved engagement surface on one hinge part interacts with the planar bearing surface on the other hinge part to create self-locking engagement, eliminating the need for complex assembly procedures or additional fastening operations.
Solution Approach 2:
The engagement surface is designed with a curved geometry that complements the planar bearing surface. This curved shape guides the engagement process and creates a self-locking mechanism that is both reliable to install and secure during operation, transforming a potentially complex multi-step fastening process into a single engagement motion.
3Adaptability or versatility
If the hinge connection allows a wide range of motion, then the adaptability to different window configurations is improved, but the risk of unintentional release increases
Solution Approach 1:
The curved engagement surface is designed with specific geometric parameters that define a predefined angular interval within which the hinge parts remain engaged. The curvature allows the connection to accommodate the necessary angular adjustments for different window configurations while the geometry itself prevents disengagement outside this interval, thus securing the connection against unintentional release.
4Loss of time
If the engagement surfaces are designed for easy engagement, then the installation time is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The curved engagement surface geometry is designed to provide self-aligning characteristics during engagement. The curvature guides the mating surfaces into proper alignment as they come together, reducing the sensitivity to initial positioning errors and allowing for faster installation while maintaining controlled manufacturing tolerances for the surface geometries.
Data Source
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AI summary
The screening device(10) is used for a pivot window and comprises a top element (12) and two side rails (13, 14) extending at right angles to the top element(12). Each said side rail is connected to the top element (12) in a hinge connection between the respective side rail and the top element (12) at or near the top element. The hinge connection is provided by a set of hinge parts (30, 50) having mutually cooperating engagement surfaces allowing positive engagement between the hinge parts (30, 50) in a predefined angle interval, and in that the engagement between the mutually cooperating engagement surfaces is releasable outside said predefined angle interval. An opening restricting element limiting the movement of the side rails (13, 14) during opening is provided, the opening restricting element being a stay element (80) connected to the side rail (13, 14) and to a mounting rail (15, 16).15