Toothbrush Handle Porous Foam Design Reducing Plastic Use
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Solution Overview
Problem
The excessive use of plastic in toothbrush manufacturing leads to environmental issues such as landfill accumulation and ocean pollution, as plastic does not biodegrade and leaches harmful chemicals.
Innovation Solution
The design of an oral care implement with a handle featuring a void space and elongated slots, reducing the amount of virgin material needed while maintaining structural integrity, incorporating an elastomeric ring portion and different materials for the thumb gripping region for comfort and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If solid plastic is used to manufacture the handle, then structural integrity is ensured, but plastic consumption increases
Solution Approach 1:
The handle incorporates a foam material with a cellular structure containing numerous voids and passageways. This porous foam material provides structural integrity while significantly reducing the quantity of plastic material needed compared to solid plastic construction.
Solution Approach 2:
The handle is divided into multiple regions including a palm gripping region with longitudinal slots, a thumb gripping region with transverse slots, and a neck region. This segmentation creates void spaces that reduce material consumption while maintaining structural strength through the distributed framework.
2Quantity of substance
If elongated slots are added to the handle, then material usage is reduced, but manufacturing complexity increases
Solution Approach 1:
The elongated slots, transverse slots, and void spaces are integrated into the foam handle structure during the molding process. By pre-forming these features in the mold, the manufacturing complexity is minimized while achieving significant material reduction.
3Ease of operation
If an elastomeric ring portion is added to the thumb gripping region, then user comfort is enhanced, but device complexity increases
Solution Approach 1:
The thumb gripping region combines an elastomeric ring portion with the foam handle material. This composite construction provides enhanced comfort and flexibility for thumb placement while maintaining the overall structural integrity of the handle.
Solution Approach 2:
The elastomeric ring portion is specifically placed in the thumb gripping region to provide localized comfort and flexibility where needed, while the rest of the handle maintains its foam structure. This targeted approach enhances user comfort without unnecessarily increasing overall device 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 significantly reduces plastic usage, enhances user comfort, and provides structural integrity, addressing environmental concerns and user experience.
Implementation Method 1
The open thumb gripping passageway may be defined by an elastomeric ring portion that is fitted into an aperture in a rigid base component
Data Source
AI summary
An oral care implement having a head and a handle. A plurality of tooth cleaning elements extend from an exposed front surface of the head. The handle has an open thumb gripping passageway extending between an exposed first surface of the handle and an exposed second surface of the handle opposite the exposed first surface. The handle also has a plurality of slots defining open slot passageways from the exposed first surface of the handle to the exposed second surface of the handle. The open thumb gripping passageway may be defined by a ring component that is fitted into an aperture in a body component. The open thumb gripping passageway may be a void space in the handle. The open slot passageways may be elongated along the handle and may serve to reduce a total amount of virgin material needed to manufacture the oral care implement.