Window Sash Support Device with Actuating Arm
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Solution Overview
Problem
Existing support devices for pivoted sashes require complex spring elements and increased structural depth, making them difficult to operate and prone to wear, especially when pivoting in and out of the frame.
Innovation Solution
A support device with a counter-support featuring a separate actuating arm that protrudes from the pivoting part, eliminating the need for additional energy accumulators by using the pivoting part to maintain pressure against the support element, allowing for a compact and ergonomic design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a spring element is used to maintain pressure force, then the support device can provide necessary contact pressure, but the structural depth increases and the device becomes more complex
Solution Approach 1:
The invention extracts and eliminates the spring element from the support device. Instead of using a spring to maintain pressure force, the solution uses a purely geometric mechanism where the pressure arm pivots about a vertical axis to maintain contact pressure between the support element and the sash, thereby simplifying the structure and reducing structural depth while still providing the necessary force.
Solution Approach 2:
The support device is designed to maintain pressure force through its own geometric configuration and pivot movement, without requiring an external energy accumulator like a spring. The pressure arm's pivot about a vertical axis automatically maintains contact pressure as the sash moves, making the system self-sufficient and eliminating the need for additional components.
2Reliability
If a spring element is used to provide pressure force, then the support function is reliable, but the operation becomes more difficult due to friction and energy storage requirements
Solution Approach 1:
By removing the spring element, the invention eliminates the friction and resistance associated with spring compression and expansion. The pressure arm pivots freely about a vertical axis, reducing the effort required to operate the support device while maintaining reliable support function through geometric constraint rather than elastic force.
Solution Approach 2:
The device uses the natural pivot movement of the pressure arm about a vertical axis to maintain contact pressure, without requiring external energy input or overcoming spring resistance. This self-service mechanism reduces operational difficulty while ensuring the support function remains reliable throughout the sash's movement.
3Force
If wedge surfaces are used to provide pressing force, then the support device can function, but wear increases due to rubbing during pivoting
Solution Approach 1:
The invention extracts the wedge mechanism and replaces it with a pivot bearing where the pressure arm rotates about a vertical axis. This eliminates the sliding friction and rubbing between wedge surfaces, significantly reducing wear and extending the service life of the support device while maintaining the necessary pressing force.
Solution Approach 2:
The invention substitutes the wedge sliding mechanism with a pivot rotation mechanism. Instead of wedge surfaces rubbing against each other during pivoting, the pressure arm rotates about a vertical axis, transforming the mechanical interaction from sliding friction to rotational movement, thereby reducing wear and improving durability.
Data Source
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AI summary
A support device (10) for a sash (2) of a window or door that pivots against a frame (1) has a pivoting part (14) with a pressure arm (15) for engaging behind an inclined edge (16) of a support element (11) in order to press the sash (2) against the frame (1) in the closed position. The pivoting part (14) is mounted on the sash (2), while the support element (11) is attached to the frame (1). To pivot the pivoting part (14) with the pressure arm (15), a separate actuating arm (23) is arranged on the pivoting part (14) and projects into the pivoting range of the support element (11).