Single Drive Rod Fitting for Double Frame Window Systems
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Solution Overview
Problem
Existing double frame systems for windows and doors require complex mechanisms and multiple control elements to achieve efficient opening and closing, often necessitating specific turning sequences and multiple drive rods, which are costly and cumbersome.
Innovation Solution
A connecting rod fitting system that centralizes the control of opening and closing functions between the outer, inner, and base frames using a single drive rod, with integrated locking elements and a concealed connecting rod mechanism, allowing for various opening positions including tilt and parallel shut-off, and optionally featuring an electric actuator and reduced handle size for improved operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two separate fittings are used to control the outer and inner frames, then the opening and closing functions can be fulfilled, but the mechanism becomes more complex requiring two drive rods and multiple gearboxes
Solution Approach 1:
The patent combines two separate fittings into a single integrated fitting that controls both the outer and inner frames. The connecting rod fitting includes a single drive rod with locking elements that can engage with counter-elements on both the base frame and inner frame, eliminating the need for separate drive rods and gearboxes while maintaining full opening and closing functionality.
Solution Approach 2:
The single drive rod is designed with multiple locking elements that can engage with different counter-elements depending on the desired operation. The same drive rod controls both the outer frame and inner frame, providing multi-functional capability for various opening modes (inward, outward, tilting) without requiring separate mechanisms.
2Adaptability or versatility
If multiple drive rods are used to control different frame parts, then all opening options can be controlled, but the cost and effort increase significantly
Solution Approach 1:
Multiple drive rods are merged into a single drive rod that incorporates all necessary locking elements. This single component can engage with counter-elements on the base frame and inner frame to control all opening options, significantly reducing manufacturing complexity and cost compared to using multiple separate drive rods.
3Ease of operation
If the drive rod is exposed, then it is easily accessible for operation, but it is subject to external influences and wear
Solution Approach 1:
The drive rod is nested within a chamber in the outer frame, which protects it from external influences such as weather and debris. The locking elements extend from the chamber to engage with counter-elements, allowing the drive rod to remain protected while still being functional. This nesting approach reduces wear on the drive rod while maintaining operational capability.
Data Source
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AI summary
A double-frame system for a window, French door, or similar, comprising a base frame (1), an outer frame (2), and an inner frame (3), includes a hardware arrangement which has a drive rod (11) located in the outer frame (2) for actuating at least some of the opening and closing functions. This drive rod (11) actuates locking elements (12) on both sides of the outer frame (2).