Espagnolette Fitting Projection for Window Pre-Assembly Marking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing espagnolette fitting parts face difficulties in assembling due to the challenge of avoiding the fastening element from striking the window, as the exact position of the fastening element is hard to find, leading to potential material weakening when creating elongated depressions.
Innovation Solution
Incorporating a projection on the fastening element that protrudes beyond the propellant, allowing for alignment and marking of the intended position on the window, enabling easy exposure and assembly by creating a visible mark for precise cutting and preventing contact with the window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fastening element is made to protrude beyond the propellant to prevent contact with the window, then the risk of striking the window is reduced, but the difficulty of locating the exact position for exposure increases
Solution Approach 1:
The patent applies preliminary action by creating a marking on the window surface before exposure. The projection of the fastening element is pressed against the window to create a visible mark indicating the exact position where exposure should occur. This preliminary marking action solves the problem of locating the precise position before making the exposure, thereby resolving the contradiction between preventing window contact and finding the exact position.
2Ease of operation
If elongated depressions are created at the window to accommodate the fastening element, then the fastening element can be properly positioned, but the material strength of the window is weakened
Solution Approach 1:
The patent applies local quality by creating a localized exposure only at the specific position where the fastening element needs to be positioned, rather than creating elongated depressions along the entire path. The projection creates a precise marking that guides a localized exposure, minimizing the removal of window material while still allowing proper positioning of the fastening element. This resolves the contradiction by maintaining window strength while enabling ease of operation.
Data Source
AI summary
A fitting (10) for a window espagnolette (4) with a drive element (22) guided longitudinally on a strike plate (11) has a fastening element (13) with a central projection (16). The projection (16) extends from a widening (15) that projects beyond the drive element (22) and serves to mark the position of the fastening element (13) during pre-assembly of the espagnolette (4). After pre-assembly, a recess (19) can be machined into the window at the mark to prevent the fastening element (13) from abutting the window.