Roof Window Roller Shutter Guide Rail Fixation Mechanism
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Solution Overview
Problem
Existing roof windows with external roller shutter devices face challenges in allowing the sash frame to be fixed securely relative to the blind frame, limiting the extent to which the roof window can be opened, especially during cleaning positions.
Innovation Solution
Incorporating a trolley that is linearly and rotatably mounted on the roller shutter guide rail and the sash frame, allowing it to be fixed in specific rotational angles, thereby establishing a permanent operative connection between the roller shutter guide rail and the sash frame, enabling secure fixation and rotation of the sash frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the roller shutter guide rail is fixed rigidly to the frame, then the roller shutter is stable and securely positioned, but the sash frame cannot be rotated freely to cleaning positions
Solution Approach 1:
The guide rail is made dynamically adjustable through a telescopic mechanism that allows it to extend and retract. When the sash is in the closed position, the guide rail extends to securely position the roller shutter. When the sash needs to be opened to cleaning positions, the guide rail can be retracted to clear the rotation path, enabling full operational range while maintaining shutter stability when needed.
Solution Approach 2:
The guide rail is divided into multiple telescopic sections that can independently extend and retract. This segmentation allows different portions of the guide rail to be positioned at different lengths, providing flexible adjustment to accommodate both the roller shutter positioning requirements and the sash rotation requirements without compromising either function.
2Ease of operation
If the guide rail is made telescopic to allow sash rotation, then the sash can reach cleaning positions, but the roller shutter positioning stability is reduced
Solution Approach 1:
The telescopic guide rail provides dynamic length adjustment: extended when roller shutter stability is needed (sash closed), retracted when sash rotation to cleaning positions is needed. This temporal separation of requirements resolves the contradiction by providing the appropriate guide rail length at the appropriate time.
Solution Approach 2:
The telescopic mechanism acts as an intermediary between the frame and the roller shutter, mediating the conflicting requirements of stability and mobility. By adjusting the guide rail length, the system can intermediate between the two extreme states of full extension for stability and full retraction for rotation freedom.
3Ease of operation
If the sash frame is locked in cleaning position, then cleaning access is improved, but the roller shutter mechanism interferes with the locking operation
Solution Approach 1:
The telescopic guide rail is dynamically adjusted to a retracted position before locking the sash in the cleaning position. This creates sufficient clearance between the roller shutter mechanism and the sash frame, allowing the locking operation to proceed without interference. The dynamic adjustment of the guide rail length eliminates the need for complex locking mechanisms that would need to accommodate the roller shutter presence.
Data Source
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AI summary
The invention relates to a roof window (1), in particular a residential roof window, with a frame (2), a sash (3) and an external roller shutter device (6) which has at least one roller shutter guide rail (7, 8) and a roller shutter (9) which is movably guided by means of the roller shutter guide rail (7, 8), wherein the sash (3) is rotatably mounted about a sash pivot axis and the roller shutter guide rail (7, 8) is rotatably mounted about the frame (2) about a guide rail pivot axis spaced apart from the sash pivot axis, and wherein the roller shutter guide rail (7, 8) is pivotally connected to the sash (3) via a guide device (11), such that a rotation of the sash (3) about the sash pivot axis causes a rotation of the roller shutter guide rail (7, 8) about the guide rail pivot axis.The guide device (11) is provided to have a trolley (12) which is mounted on the one hand so as to be linearly movable on the roller shutter guide rail (7,8) and on the other hand so as to be rotatable on the sash frame (3), wherein the trolley (12) can be fixed to the roller shutter guide rail (7,8) and/or the sash frame (3) in order to fix the sash frame (3) relative to the frame (2).