Window Frame Labyrinth Seal and Spring-Elastic Fastening
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Solution Overview
Problem
Existing window frame systems, particularly those with tilt and turn window sashes, are complicated to assemble and require additional seals, leading to potential errors and increased complexity.
Innovation Solution
A window frame composed of vertically and horizontally molded parts with mitred connections forming a labyrinth seal, allowing for easy assembly without additional seals and featuring variable fastening means for diverse applications, including spring-elastic fastening elements for secure and error-tolerant installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional seals are used to ensure weather tightness at miter joints, then sealing reliability is improved, but device complexity and installation complexity increase
Solution Approach 1:
The sealing function is merged into the miter joint structure itself. The profiling of the molded parts creates an integrated sealing system where the miter joint and seal are combined into a single structural feature, eliminating the need for separate seal components while maintaining weather tightness
Solution Approach 2:
The miter joint structure provides its own sealing function through the profiling design. The complementary stair-step profiles of the miters create an automatic seal when joined, requiring no additional sealing materials or complex installation procedures
2Strength
If fastening means are precisely positioned for optimal connection, then connection strength is improved, but manufacturing precision requirements and assembly complexity increase
Solution Approach 1:
The fastening means features an asymmetric design with a resilient leg that has a preferred bending direction. This asymmetry allows the fastening element to accommodate positioning variations while still achieving strong connection, as the resilient leg can deflect to compensate for minor misalignments during assembly
Solution Approach 2:
The fastening means utilizes elastic deformation as a parameter change mechanism. The resilient leg bends during insertion and then springs back to lock the window frame in place, allowing for tolerance compensation through controlled deformation rather than requiring precise initial positioning
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 assembly process, reduces errors, and eliminates the need for additional seals, while enabling easy replacement and secure attachment of the window frame, enhancing usability and reliability.
Implementation Method 1
The fastening means have at least one spring-elastic leg, on which a locking lug is arranged, which can be locked in the undercut
Data Source
Figure 1~2
Figure 3
Figure 4a~7
AI summary
The window frame (1) is assembled of two vertical and two horizontal profiles (12) joined at the corners. The appropriate edges of the profiles are connected by engaging complementary stepped recesses and elevations. A labyrinth sealing unit is formed simultaneously. A cover (2) is clipped to the front of the frame (1) with joint elements (3), each provided with an elastic segment (8) and a projection to be inserted into a matching space (4) at the frame (1). The elastic segment (8) can be pressed for removing the cover element (2). Independent claims are given for the joint element and for the front cover.