Non-Coplanar Handle Tines for Tear-Resistant Duster Retention
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Solution Overview
Problem
Existing cleaning handles face issues with retention of cleaning devices, leading to tearing and inefficiencies, particularly when using plural-sided dusters for cleaning surfaces, due to inadequate attachment mechanisms that often result in either tearing of the cleaning article or complex assembly processes.
Innovation Solution
The handle features tines that are non-coplanar with a reference plane, providing a concave geometry for secure attachment and reduced contact area, allowing for easier insertion and removal of cleaning articles without causing damage, and utilizing a grip and tines that are unitary or joinable, facilitating maneuverability and pressure on the target surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional coplanar tines are used for attachment, then the structure is simple, but the cleaning article is torn during insertion and removal
Solution Approach 1:
The patent transitions from coplanar tines (2D arrangement) to non-coplanar tines (3D arrangement), where at least one tine extends out of the reference plane. This dimensional change allows the tines to engage the cleaning article from multiple angles, distributing insertion forces more evenly and preventing concentrated stress that causes tearing.
2Reliability
If corrugations are added to frictionally engage the duster, then retention is improved, but the duster is torn during insertion
Solution Approach 1:
Instead of adding corrugations that extend into the cleaning article (causing tearing), the patent uses non-coplanar tine arrangements that provide retention through three-dimensional geometric engagement. The tines contact the cleaning article at multiple points and angles without requiring deep insertion or friction surfaces that would damage the article.
Solution Approach 2:
The patent employs curved or angled tine configurations rather than straight coplanar tines. This curvature allows the tines to naturally conform to the cleaning article shape and provide retention through geometric interlocking rather than friction, reducing insertion forces and preventing tearing.
3Reliability
If thin deformable projections are added to tines for engagement, then retention is improved, but the cleaning article is torn upon insertion
Solution Approach 1:
The patent replaces thin deformable projections with non-coplanar tine arrangements that achieve retention through three-dimensional spatial engagement. The tines extend at angles to the reference plane, creating a basket-like structure that secures the cleaning article without requiring deformable elements that would concentrate stress and cause tearing during insertion.
4Reliability
If a dedicated attachment portion is added to the handle, then retention is improved, but assembly complexity increases
Solution Approach 1:
The patent makes the entire tine structure serve dual functions: providing structural support for the handle and simultaneously serving as the attachment mechanism for the cleaning article. By making all tines non-coplanar, the attachment function is integrated into the basic tine structure rather than requiring separate dedicated attachment components, thus avoiding increased assembly complexity.
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 reduces the likelihood of tearing during attachment and detachment, providing a secure and efficient cleaning experience with lower insertion and removal forces, enhancing the usability and value of disposable cleaning articles by minimizing damage and improving cleaning effectiveness across various surfaces.
Implementation Method 1
The non-coplanar configuration reduces the contact area between the tine and the cleaning article, thereby reducing the insertion and removal forces required while maintaining secure attachment during use
Data Source
Figure 1~2
Figure 3~4
AI summary
A handle for receiving a cleaning article, such as a dusting device. The handle has one or more tines which are disposed outboard of a reference plane. This geometry provides a friction fit for receiving a removable cleaning device on the tines, without substantial interference. The friction fit retains the cleaning article on the handle during use while reducing tearing which occurs during installation.