Non-Coplanar Handle Tines for Secure Removable Duster Fit
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Solution Overview
Problem
Existing dusting devices face issues with retention of cleaning articles on handles, leading to tearing and inefficiencies, particularly with plural-sided dusters, due to inadequate attachment mechanisms that increase complexity and risk of damage.
Innovation Solution
An elongate handle with tines that are non-coplanar with the reference plane, providing a concave geometry for secure attachment and reduced contact area to increase cleaning efficiency and prevent tearing, while allowing for easy insertion and removal of cleaning articles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional coplanar tines are used for attaching cleaning articles, then the attachment mechanism is simple, but the cleaning article tears upon insertion and retention is inadequate
Solution Approach 1:
The tine is designed with a non-coplanar geometry where the distal end is offset from the reference plane, creating a curved or three-dimensional structure instead of a flat coplanar configuration. This curvature allows the tine to engage the cleaning article at multiple points and angles, providing secure retention without requiring complex additional components.
Solution Approach 2:
The invention transitions from a two-dimensional coplanar tine structure to a three-dimensional non-coplanar structure by offsetting the distal end of the tine from the reference plane. This addition of the third dimension (vertical offset) enables the tine to provide retention in multiple directions simultaneously, solving the retention problem without increasing overall device complexity.
2Reliability
If corrugations or deformable projections are added to tines for frictional engagement, then retention improves, but the cleaning article tears upon insertion
Solution Approach 1:
Instead of adding sharp corrugations or deformable projections that can tear the cleaning article, the invention uses a smooth non-coplanar curved geometry. The curved surface of the offset distal end provides continuous contact and frictional engagement without concentrated stress points, thereby preventing tearing while maintaining retention.
Solution Approach 2:
The invention converts what would traditionally require aggressive features (corrugations, projections) into a beneficial smooth curved surface. The non-coplanar geometry itself, rather than additional aggressive features, provides the necessary frictional engagement, turning a potential source of damage into a retention mechanism that is gentle on the cleaning article.
3Reliability
If multiple attachment means are added to the handle, then retention improves, but assembly complexity increases
Solution Approach 1:
The invention merges the attachment function into the existing single tine structure by giving it non-coplanar geometry. Instead of adding separate attachment mechanisms (clips, spirals, inflected members), the modified tine geometry itself provides the retention function, combining structural support and attachment security in one element.
Solution Approach 2:
The non-coplanar tine serves multiple functions simultaneously: it provides structural support for the cleaning article, creates frictional engagement through its curved surface, and enables secure retention through its three-dimensional geometry. This multi-functionality eliminates the need for separate specialized attachment components.
Data Source
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.