Window Sash Braking Device with Elastic Tongues
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Solution Overview
Problem
Existing braking devices for windows and doors are difficult to assemble and lack the ability for permanent adjustment of braking force, often requiring complex mechanisms and multiple components.
Innovation Solution
The braking device employs individual tongues as resilient elements inclined relative to the direction of movement, integrated within a C-shaped slide rail, allowing for adjustable friction and easy assembly without the need for additional preloading devices, and features a grid of marks for enhanced resistance and tactile guidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If complex mechanisms and multiple components are used in braking devices, then the braking force can be adjusted, but the assembly becomes difficult and the device complexity increases
Solution Approach 1:
The brake strip is segmented into multiple identical modular units, each comprising a resilient element and friction surface. These modular segments can be independently manufactured and assembled by simply stacking them between the brake slide and guide rail, eliminating complex adjustment mechanisms while providing scalable braking force through the number of segments used.
Solution Approach 2:
The resilient element and friction surface are merged into a single integrated brake strip component rather than separate parts. This consolidation reduces the total number of components and simplifies assembly, as the brake strips are directly positioned between the brake slide and guide rail without requiring additional fastening or adjustment mechanisms.
2Force
If additional preloading devices are added to adjust friction, then the braking force can be optimized, but the device complexity and manufacturing cost increase
Solution Approach 1:
The resilient elements inherently provide the necessary preloading force through their elastic deformation when compressed between the brake slide and guide rail. This self-generating force eliminates the need for external preloading devices, adjustment screws, or spring mechanisms, thereby optimizing braking force without adding complexity or cost.
3Ease of operation
If the brake strip is open-ended, then the brake carriage is accessible, but slippage of the brake strip may occur
Solution Approach 1:
The guide rail has different structural characteristics at different locations: the intermediate sections are open to allow access to the brake carriage, while the end sections are closed to prevent slippage of the brake strip. This localized differentiation of structural quality achieves both accessibility and reliability without compromising either function.
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
This design enables easy adjustment of braking force, reliable guidance, and simplified construction, reducing production costs and allowing for customizable braking effects, while ensuring stability and preventing slipping.
Implementation Method 1
the brake strip has a series of spring-elastic elements for generating a braking force relative to the brake slide
Implementation Method 2
the brake strip has a series of spring-elastic elements for generating a braking force relative to the brake slide
Data Source
Figure 1~2
Figure 3~4b
Figure 5~7
AI summary
A braking device (3, 103) for a window sash (2) that is movable relative to a fixed frame (1) has a braking strip (7, 107) with a series of spring-elastic elements (11, 111). The spring-elastic elements (11, 111) generate a braking force of the braking strip (7, 107) against a braking slide (9, 109). The braking device is of a particularly simple design.