Spring-Elastic Stop Section for Window Locking Rod Fitting
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Solution Overview
Problem
Existing locking parts for windows and doors often require increasing force to fully close due to uneven contact pressure between the sash and frame, leading to discomfort and potential failure to reach a fully closed position.
Innovation Solution
A locking part with a spring-elastic stop section that deforms to maintain a consistent and adjustable contact pressure, allowing the locking element to bear against the stop section with variable force, ensuring secure closure and reducing operational effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a rigid stop section is used in the locking part, then the structure is simple and manufacturing is easy, but the contact pressure between sash and frame becomes uneven and increases continuously during closing, requiring excessive force to reach full closure
Solution Approach 1:
The stop section is designed with spring-elastic properties, changing its mechanical parameter from rigid to elastic. This allows the stop section to deform under load, maintaining consistent contact pressure throughout the closing process and reducing the force required to achieve full closure, while still being manufacturable using standard spring fabrication techniques
Solution Approach 2:
The stop section transitions from a static rigid structure to a dynamic elastic element that can deform and recover. This dynamic behavior allows the system to adapt to varying loads during closing, maintaining optimal contact pressure without requiring excessive closing force
2Reliability
If seals are added between sash and frame to improve sealing, then sealing performance is improved, but the seals create preloading that opposes the closing force and increases operational effort
Solution Approach 1:
The spring-elastic stop section acts as an intermediary element between the locking mechanism and the sash-frame contact. It mediates the force transmission by deformable elastic elements, allowing the system to overcome seal preloading more easily while maintaining reliable sealing performance
3Reliability
If the receiving section is enclosed in a U-shape, then the locking element is securely retained, but the device complexity increases compared to open configurations
Solution Approach 1:
The holding element is designed to combine multiple functions: it provides the stop section for force application, forms part of the receiving section structure, and integrates the spring-elastic properties directly into the locking mechanism. This merging of functions achieves reliable locking without requiring separate U-shaped enclosing structures
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
The spring-elastic stop section generates a defined and adjustable contact pressure, ensuring the sash is pulled tightly against the frame, enhancing comfort and safety during closure while maintaining secure locking.
Implementation Method 1
The stop section of the holding element of the closing part is designed to be spring-elastic at least in some areas
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
A locking element for a locking rod fitting of a window, door or the like comprises at least one retaining element with a receiving section adjacent to the retaining element for receiving a locking element of the window, door or the like, wherein the retaining element has a stop section oriented towards the receiving section, which is at least partially spring-elastic.