Concealed Window Fitting 180° Pivot Control Lever
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Solution Overview
Problem
Concealed window and door fittings typically allow only a limited pivoting angle of up to 90° or 110° due to their complex mechanics, preventing the sash from being opened fully relative to the frame.
Innovation Solution
A fitting with a deployment control device featuring a control lever with a sprocket section that meshes with a gear wheel on the sash support arm, allowing the sash to pivot open beyond 90° by reducing the number of pivot points and enabling direct operation, thereby increasing the possible opening angle to up to 180°.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If concealed fittings are used to maintain aesthetic appearance, then the fittings are not visible from the outside, but the maximum pivoting angle is limited to 90° or 110°
Solution Approach 1:
The control lever is divided into distinct functional sections: a first section that rotates about a fixed axis and a second section that translates linearly. This segmentation allows the mechanism to achieve both rotational and translational movements independently, enabling the sash to pivot beyond 90° while maintaining concealed fitting aesthetics.
Solution Approach 2:
The control lever transitions from purely rotational movement to a combination of rotational and translational movement by adding the linearly movable second section. This dimensional change in the movement pattern allows the mechanism to achieve larger pivoting angles without compromising the concealed design.
2Adaptability or versatility
If complex belt or gear mechanisms are integrated to achieve larger opening angles, then the pivoting angle increases, but the device complexity increases significantly
Solution Approach 1:
The invention extracts and eliminates unnecessary intermediate components from the control mechanism. By using a simplified control lever with direct rotational and translational sections, complex belt or gear mechanisms are removed while still achieving the desired larger pivoting angles.
Solution Approach 2:
The control lever acts as an intermediary element that directly connects the counter-element to the sash support arm. This single-piece control lever mediates the force transmission without requiring complex intermediate mechanisms, thereby reducing device complexity while maintaining functionality.
3Ease of operation
If multiple articulations are provided in the control lever for conventional fittings, then the mechanism can be actuated, but the number of pivot points increases and limits the range of motion
Solution Approach 1:
Multiple control functions are merged into a single control lever structure. The first section handles rotational actuation while the second section handles translational movement, combining what would traditionally require multiple separate articulated components into one integrated element.
Solution Approach 2:
The control lever is designed as a multi-functional component that simultaneously performs rotational movement about a fixed axis and linear translation. This universal design allows a single component to achieve control functions that would traditionally require multiple separate articulations.
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
Enables the sash to be opened up to 180° relative to the frame, providing a complete view through the opening while maintaining a simple mechanical design, similar to external fittings, with the rebate of the sash pivoted out of the frame opening area.
Implementation Method 1
a gear wheel that meshes with the sprocket section and is rotatably mounted on the sash support arm
Implementation Method 2
The gear wheel is positively connected to the wing corner bearing, so that the gear wheel acts on the control lever via the sprocket section when the wing is pivoted open
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention relates to a fitting (1) for concealed arrangement in the rebate between a sash (2) and a frame (3) of a window, door or the like, comprising a bearing band (7) of a frame corner bearing (4) to be attached on the frame side, a sash corner bearing (5) to be attached on the sash side and a sash pivot bearing (6), wherein a sash support arm (8) is pivotally mounted on the bearing band (7) and wherein an opening control device (10) coupled to the bearing band (7) and the sash support arm (8) is provided, by means of which the sash pivot bearing (8) is pivoted out relative to the bearing band (7) when the sash (2) is pivoted out.In order to provide a fitting that can be pivoted up to 180°, the invention provides that the opening control device (10) includes a control lever (11) with a toothed ring section (12) which pivots out when the sash (2) is pivoted out, and a gear (13) mounted on the sash support arm (8) which meshes with the toothed ring section (12), wherein the gear (13) is provided for a positive connection with the sash corner bearing (5) and acts on the toothed ring section (12) when the sash (2) is pivoted.