Wing Assembly Opening Limit with Integrated Scissor Arm
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Solution Overview
Problem
Existing wing arrangements with rotation-limiting mechanisms have complex structures requiring precise manufacturing and a large number of components, making them difficult to operate and maintain.
Innovation Solution
A simplified wing arrangement using a switching rod, guide plate, and scissor arm with a pin guide, where the pin engages a guide groove to limit pivoting, allowing the sash to be locked in a partially open position with a small number of easy-to-manufacture components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rotation-limiting arrangement with multiple individual elements is used, then the sash can be locked in a partially open position, but the structure becomes complex and manufacturing precision requirements increase
Solution Approach 1:
The patent combines multiple rotation-limiting elements into a single integrated mechanism. The rotatable blocking element and rotation-limiting element are merged into one component that rotates within the opening to limit sash rotation, eliminating the need for separate individual elements and reducing structural complexity while maintaining reliable partial position locking
2Reliability
If multiple precisely manufactured components are used for rotation limitation, then the sash can be secured in position, but manufacturing costs and assembly difficulty increase
Solution Approach 1:
By merging multiple precision components into a single rotatable mechanism with an opening and blocking element, the patent reduces the number of parts that require precise manufacturing. The integrated design requires fewer tolerances and simplifies production while maintaining secure position locking capability
3Ease of operation
If a complex rotation-limiting arrangement is used, then the sash can be locked partially open, but the number of components increases making operation more difficult
Solution Approach 1:
The patent simplifies operation by integrating the locking mechanism into a single rotatable component that moves within an opening. This unified design reduces the number of separate operations needed while maintaining reliable partial position locking, making the system easier to operate compared to multi-element arrangements
Data Source
Figure 1
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Figure 3a~3c
AI summary
The invention relates to a wing assembly (10) comprising a frame (12) and a wing (14) of a door or window pivotably mounted on the frame (12), wherein an opening limiting device (40) is provided which allows the wing (14) to pivot relative to the frame (12) only to a partially open position, wherein the opening limiting device (40) comprises a switching rod (42), a guide plate (44) and a scissor arm (46), wherein the switching rod (42) is slidably guided on the wing (14) along a longitudinal direction (54), wherein the guide plate (44) is fixed on the wing (14) and the switching rod (42) and the guide plate (44) overlap each other at least partially along the longitudinal direction (54), wherein the switching rod (42) is coupled to a handle (38) arranged on the wing side by means of a drive rod (50, 52).wherein the scissor arm (46) is pivotably mounted on the frame (12) at one end (56) and has a pin (60) at the other end (58) which engages, at least in the partially opened position of the sash (14), in a guide groove (62) formed in the guide plate (44) which is closed at one end, wherein the pin (60) rests against the closed end (64) of the guide groove (62) in the partially opened position, thereby limiting pivoting of the sash (14) in the opening direction.