Toolless Corner Hinge for Window Sash Assembly

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing corner bearing arrangements for windows and doors require tools for assembly and drilling, making installation complex and inconvenient, especially for aluminum profiles.

Innovation Solution

A corner hinge with strap parts adapted to fitting part receptacles, allowing form-fitting connections without additional fastening means, enabling tool-free assembly and adjustment, using C-shaped grooves and adjusting screws for secure positioning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If conventional corner bearings are used with screw connections or clamping devices, then secure fastening is achieved, but tool assembly is required and installation becomes complex

Engineering Contradiction:

ImproveEase of installationVSAvoidAssembly complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The corner bearing is divided into separate horizontal and vertical strap parts that can be independently inserted into recesses in the sash and frame, allowing simple tool-free assembly through insertion and engagement of the segmented components

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The strap parts are designed with self-aligning features and engagement mechanisms that automatically position and secure the components without requiring external tools, with the vertical strap part reaching behind the horizontal strap part to provide self-contained fastening

Inventive Principle:

Principle #25Self-service

2Reliability

If drilling is performed into aluminum profiles for screw fastening, then secure attachment is achieved, but the aluminum profile is damaged and wear increases

Engineering Contradiction:

ImproveFastening securityVSAvoidDamage to aluminum profile

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The fastening function is extracted from the aluminum profile itself and transferred to separate strap parts that engage with recesses in the profile, eliminating the need to drill into and damage the aluminum while maintaining secure attachment

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The strap parts serve as intermediary elements between the corner bearing and the aluminum profile, providing secure fastening through engagement with recesses without requiring direct screw connections that would damage the aluminum

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If adjusting screws are added for position adjustment, then sash position can be adjusted, but assembly complexity increases

Engineering Contradiction:

ImprovePosition adjustabilityVSAvoidNumber of components

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The adjustment mechanism is merged with the existing strap part structure, where the vertical strap part reaching behind the horizontal strap part provides both positioning and adjustment functionality without adding separate complex adjustment mechanisms

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentEP2060716B1Toolless mountable angle iron

Publication Date: 2018.04.11 ROTO FRANK AG

Figure 1
Figure 2
Figure 3

AI summary

The corner hinge (15) has a horizontal hinge part, which is partially inserted in a horizontal hardware adapter of the wing and a vertical hinge part, which is partially inserted in a vertical hardware adapter of the wing. Hinge parts (20,22) are connected in form-fit manner in assembled corner hinge.