Concealed Window Fitting With Integrated Base Plate
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Solution Overview
Problem
Conventional window and door fitting arrangements are susceptible to weight limitations due to weak component connections and limited space for stable attachment, compromising security and increasing manufacturing costs with complex assembly processes.
Innovation Solution
A concealed fitting design featuring a base plate with increased material thickness, a bearing plate connected to the base plate for enhanced load absorption, and a control arm with a pivot bearing, along with a stepped cross-section link for improved stability and wear resistance, allowing for greater sash weights while maintaining a compact and visually appealing structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional fitting arrangements with thin components are used, then the structure remains compact and simple, but the fitting cannot accommodate greater sash weights and security is impaired
Solution Approach 1:
The patent combines the base plate and bearing plate into a single integrated component with increased material thickness. This merging of functions allows the fitting to accommodate greater sash weights without requiring additional separate components, thus improving load bearing capacity while avoiding increased device complexity
Solution Approach 2:
The patent changes the material thickness parameter of the fitting component from thin to increased thickness. This parameter change directly improves the strength and load bearing capacity of the fitting, allowing it to support heavier sashes while maintaining structural integrity
2Strength
If additional components are added to accommodate higher sash weights, then the load bearing capacity increases, but manufacturing costs and assembly complexity increase
Solution Approach 1:
By merging the base plate and bearing plate functions into a single integrated component, the patent eliminates the need for additional separate parts. This reduces manufacturing costs by decreasing the number of components that need to be produced, assembled, and inventoried, while still achieving the required load bearing capacity for higher sash weights
3Strength
If component connections have limited space for stable attachment, then the fitting structure remains compact, but the individual components are designed too weak and security is compromised
Solution Approach 1:
The patent changes the material thickness parameter of the fitting component to increased thickness, which directly improves the strength of component connections. This allows for stable attachment and secure fastening of the fitting to the sash and frame, enhancing security without requiring additional space or volume
Data Source
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AI summary
Fitting between a sash/leaf (1) and a fixed frame (2) of a window, of a door or the like, which fitting is arranged in a concealed manner and comprises at least one sash/leaf bearing (3) which has a base plate (4) for mounting on the fixed frame (2) of the window or of the door, and with an opening-out arm (5) and a control arm (6) which are in each case pivotably connected to the base plate (4) by one end (5a, 5b) and which can in each case be movably coupled to the sash/leaf (1) by their other end (5b, 6b), wherein the opening-out arm (5) and the control arm (6) are rotatably coupled to one another to form an X-scissors arrangement, wherein the base plate (4) is connected to a bearing plate (7) in a force-fitting manner, which bearing plate is movably connected to the end (5a) of the opening-out arm (5), wherein the bearing plate (7) has an arcuate guide (8) with a centre axis (9) and the guide (8) is designed as a slotted track in which at least a central portion (11) of a cylindrical guide pin (10) connected to the opening-out arm (5) is movably guided to a limited degree relative to the control arm (6) along the arcuate guide (8), wherein a second guide (12) with a slotted track which receives the head part (13) of the guide pin (10) is arranged on the base plate (4) congruently to the centre axis (9) of the guide (8).