Espagnolette Fitting One-Piece Angle Element Assembly
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Solution Overview
Problem
Existing connecting rod fittings for windows and balcony doors have unstable and complex assembly processes due to low stability in corner connections and require multiple components, making reliable pre-assembly and installation challenging.
Innovation Solution
A one-piece angle element integrated with the faceplate section of the first long part, featuring a protruding guide pin and recess, allows for easy assembly and high stability by overlapping with the second long part's cover rail section, providing anti-twist protection and simplifying the connection process through a snap-in mechanism and rivet design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cover rail sections are locked together in the corner area using conventional latching mechanisms, then the assembly can be pre-assembled, but the connection has only a low level of stability and requires complex assembly procedures
Solution Approach 1:
The angle element combines multiple functions into a single integrated component: it serves as a connection element between cover rail sections, provides a guide pin for alignment, incorporates a recess for receiving the guide pin, and creates an overlapping connection structure. This merging of functions into one component achieves stable pre-assembly without requiring complex separate latching mechanisms
Solution Approach 2:
The guide pin acts as an intermediary element that mediates the connection between the angle element and the cover rail section. The guide pin with its corresponding recess provides precise alignment and stable connection, eliminating the need for complex latching mechanisms while ensuring reliable pre-assembly
2Ease of manufacture
If multiple separate components are used for the angle element and faceplate section, then the assembly is flexible, but the number of components increases and assembly becomes complex
Solution Approach 1:
The angle element and faceplate section are manufactured as a single integrated one-piece component. This consolidation reduces the total number of parts that need to be managed and assembled, while the integrated design maintains all necessary functional features for connection and alignment, significantly simplifying the assembly process
3Reliability
If the guide pin and recess are positioned close to the spring assembly connection, then the structure is compact, but the connection stability is reduced
Solution Approach 1:
The guide pin and recess are positioned at a specific distance from the spring assembly connection point, creating a localized stable connection zone. This spatial arrangement ensures that the guide pin connection is optimally positioned to provide anti-twist protection and stable alignment, while the spring assembly maintains its functional independence. The deliberate spacing creates optimal local connection quality without compromising overall structural compactness
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 enables easy and stable assembly of the connecting rod fitting with enhanced reliability and reduced component complexity, ensuring secure locking and protection against unauthorized unlocking, while allowing for flexible design and low stock requirements.
Implementation Method 1
a spring assembly (17) of a corner guide (15)
Data Source
Figure 1
Figure 2~3
Figure 4a~4b
AI summary
The connecting rod fitting (3) has an oblong part (9) and another oblong part (10), where the oblong parts have connecting rod sections (13,14) of a connecting rod (5) and face plate sections (11,12). A corner drive (15) is provided with a flexible spring pack (17). The face plate section of the former oblong part is manufactured with an angle element (20) in a single-piece manner.