Radial Coupling Knob for Electrical Panel Closing Systems
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Solution Overview
Problem
Existing closing systems for electrical panels require users to manually find the correct orientation for coupling tools with protruding elements, leading to inefficiency and high friction, making it difficult to easily open or close the panels.
Innovation Solution
A closing system with a knob and operating key that couples radially, featuring a U-shaped body with converging arms and a protruding element, allowing intuitive alignment and reduced friction through elastic deformation, enabling easy opening and closing without axial force application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a protruding shaped element is used on the knob to enable key coupling, then the cover can be opened and closed easily by rotating the knob, but the tool's counter-shaped outline may not be oriented in concordance with the protruding element, requiring trial and error to find the correct orientation
Solution Approach 1:
The patent applies preliminary action by providing visual indicators (such as colored rings or markings) on both the knob and the key that align beforehand to indicate the correct orientation. This preliminary visual alignment eliminates the need for trial and error during operation, as the correct orientation is indicated by the alignment of these pre-configured visual features.
Solution Approach 2:
The patent utilizes color changes or colored indicators (such as colored rings at specific positions on the knob and corresponding colored markings on the key) to provide visual feedback on orientation. When the colored features align, it indicates the correct orientation is achieved, eliminating the need for trial and error and improving ease of operation.
2Reliability
If considerable friction exists between the tab and striker surface, then the locking mechanism remains secure, but the operator must apply considerable axial force to the knob to prevent the tool from disengaging and spinning around
Solution Approach 1:
The patent segments the force application by separating the rotational motion (for opening/closing) from the axial force requirement. The coupling between the key and knob is designed such that once engaged, the rotational operation is facilitated by the keyway geometry rather than requiring continuous axial force, reducing the effort needed during operation while maintaining secure locking through the tab-striker friction.
Solution Approach 2:
The patent introduces dynamic characteristics by designing the keyway and knob coupling to allow smooth rotational movement once engaged. The geometric interaction between the keyway and shaped element enables the knob to rotate with minimal axial force after initial engagement, transforming the static friction problem into a dynamic operation that requires reduced force.
3Shape
If the keyway is flush with the cover surface to maintain a clean appearance, then the panel looks neat, but the keyway cannot be used for detaching the cover or rotating it on its hinges
Solution Approach 1:
The patent achieves universality by designing the protruding shaped element on the knob to serve multiple functions: it provides the primary locking mechanism through engagement with the key, and simultaneously acts as a handle or attachment point for manipulating the cover (such as detaching or rotating on hinges). This multi-functional design eliminates the need for separate features, maintaining a clean flush appearance while providing versatile functionality.
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
Facilitates simplified and intuitive coupling between the key and knob, reducing the need for trial-and-error orientation and minimizing axial force required to overcome friction, ensuring effective and easy operation of the electrical panel.
Implementation Method 1
A closing system with a knob and operating key that couples radially, featuring a U-shaped body with converging arms and a protruding element, allowing intuitive alignment and reduced friction through elastic deformation
Data Source
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AI summary
A closing system (12) for an electrical panel comprises a knob (14) adapted to be arranged on a cover (16) of an electrical panel (18). The knob (14) is operatively connected to a locking tab (20) so that a rotation of the knob (14) around an axis (x) corresponds to a rotation of the tab (20). The closing system (12) further comprises an operating key (22) which may be coupled with the knob (14). The operating key (12) and the knob (14) are configured to couple according to a coupling direction (y) substantially radial to the rotation axis (x) of the knob (14). The operating key (22) and the knob (14) are arranged with respective coupling surfaces (24, 26; 28, 30) which allow the rotation of the knob (14) around the axis (x), acting with a corresponding rotation of the operating key (12).