Adjustable Scissor Window Drive Stroke Optimization
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Solution Overview
Problem
Existing window drives with scissor arrangements cannot optimize the actuation stroke for locking, which limits the achievable opening width of window wings.
Innovation Solution
An adjusting device is introduced to optimize the division of the actuation stroke between locking and opening movements by allowing fine adjustments to the positioning of the locking element, enabling a larger opening width by altering the ratio of locking to opening strokes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the actuation stroke is allocated to locking movement, then the locking function is ensured, but the opening width of the sash is reduced
Solution Approach 1:
The patent makes the stay mechanism adjustable by allowing the locking element to be repositioned along the stay arm at different locations. This dynamic adjustment capability enables the locking element to be optimally positioned to minimize the locking stroke while ensuring adequate locking function, thereby maximizing the opening width without compromising security.
Solution Approach 2:
The invention changes the parameter of the locking element position along the stay arm. By adjusting the position of the locking element to different locations on the stay arm, the ratio between locking stroke and opening stroke can be optimized, allowing more of the actuation stroke to be used for opening while maintaining sufficient locking capability.
2Ease of manufacture
If the stay mechanism is fixed in design, then manufacturing is simplified, but adaptability to different window types and locking strokes is limited
Solution Approach 1:
The patent transforms the fixed stay mechanism into an adjustable one by providing means to reposition the locking element along the stay arm. This maintains manufacturing simplicity while enabling adaptation to different window types, locking stroke requirements, and opening width preferences through field-adjustability.
Solution Approach 2:
The adjustable locking element mechanism provides multi-functionality, allowing the same stay mechanism design to serve multiple window types and configurations. The locking element can be positioned at different locations to accommodate various locking stroke requirements and desired opening widths, making a single design universally applicable.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The drive has a scissor assembly (1) which is arranged on a push rod (2), where the scissor assembly has a stationary bearing arm (3) on which a scissor handlebar (4) is rotatably mounted with a connecting link (10). A clamping element (6) provided with a locking element (7) mounted on the push rod is positioned and fixed with the clamping element. An adjusting device for setting a spacing is arranged spatially fixed between the bearing arm and the locking element on the bearing arm or on the locking element.