Formable Toothbrush Handle for Custom Grip
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Solution Overview
Problem
Standard toothbrush handles can be difficult for individuals, including children and those with arthritis, to grasp due to their small size or lack of grip, and producing left- and right-handed toothbrushes requires additional resources and costs.
Innovation Solution
A toothbrush with a handle made of formable material, such as EVA, that can be shaped to fit an individual's hand, featuring a socket for interchangeable toothbrush heads and an armature for enhanced grip and retention, allowing for customizable asymmetric geometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If standard narrow handles are used, then manufacturing costs are low and production is simple, but grip security and ease of operation deteriorate for users with arthritis or small hands
Solution Approach 1:
The handle is divided into a rigid core structure and a separate formable outer layer. The rigid core provides structural support while the outer layer can be customized by users to fit their hand contours, resolving the contradiction between manufacturing simplicity and grip security.
Solution Approach 2:
The handle is pre-formed with a basic ergonomic shape during manufacturing, then heated and further shaped by the user to achieve a custom fit. This preliminary preparation allows the handle to provide immediate basic grip security while enabling later customization for optimal user comfort.
2Adaptability or versatility
If asymmetric handles are produced for both left- and right-handed users, then adaptability improves, but manufacturing complexity and inventory requirements worsen
Solution Approach 1:
The handle features an asymmetric formable portion that can be shaped to fit either left or right hands. The rigid core maintains structural integrity while the outer layer is designed to be molded into asymmetric configurations suitable for different handedness preferences.
Solution Approach 2:
The handle transitions from a static symmetric manufactured form to a dynamic customizable form through heating and shaping. This allows a single symmetric design to adapt to multiple asymmetric user needs, eliminating the requirement for separate left-handed and right-handed models.
3Ease of operation
If formable materials are used in the handle, then ease of operation and custom fit improve, but manufacturing complexity and material costs worsen
Solution Approach 1:
Only the outer layer of the handle, not the entire structure, is made from formable material. This localized application of special materials provides the necessary customization capability while minimizing material costs and manufacturing complexity.
Solution Approach 2:
The handle combines a rigid core material with a formable outer layer material. This composite structure leverages the advantages of both materials: the rigid core provides structural support at low cost, while the formable outer layer enables customization without requiring the entire handle to be made from expensive special materials.
4Ease of operation
If the entire toothbrush is made formable, then custom grip improves, but structural stability and durability worsen
Solution Approach 1:
The toothbrush is segmented into a rigid core structure and a formable outer layer. The rigid core maintains structural stability and durability, while the formable outer layer provides grip customization, resolving the contradiction between these two requirements.
Solution Approach 2:
The formable material is applied only to the outer surface of the handle where grip contact occurs, while the internal structure remains rigid. This localized differentiation allows the handle to be both structurally stable and customizable for user comfort.
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
The formable handle provides a secure grip and retention, accommodating both left- and right-handed users while reducing waste and costs by allowing the handle to be reshaped and the toothbrush head to be replaced independently.
Implementation Method 1
A formable material may be a plastic comprising the polymer ethylene vinyl acetate (EVA), polyurethane and the like. The ratios of the copolymers in EVA, can be varied to change the melting and freezing point of the copolymer. As the ratio of vinyl acetate increases, the melting and freezing points of the EVA copolymer decrease. A heat formable material may be heated above a melting or softening point to enable the polymer to be formed
Implementation Method 2
A heat formable material may be heated above a melting or softening point to enable the polymer to be formed, and then allowed to cool below its freezing point to set and retain the formed shape
Implementation Method 3
A temperature indicator may be provided with the toothbrush and may be attached to the handle, portion of the toothbrush. A user may place the handle of the toothbrush in boiling or heated water and observe the temperature indicator. When the temperature indicator indicates the handle has reached an effective temperature for forming, the user may remove the toothbrush handle and form it. A temperature indicator may change color, such as from red to green, for example, when the temperature exceeds a preset value
Implementation Method 4
The handle will take on the shape of the user hand to produce an asymmetric handle having an asymmetric geometry about a centerline of the handle. In an exemplary embodiment, the formed handle will have finger recesses and/or a protrusion that is shaped to fit into the palm of the user's hand
Implementation Method 5
A heat formable material may be heated above a melting or softening point to enable the polymer to be formed, and then allowed to cool below its freezing point to set and retain the formed shape
Data Source
AI summary
A formable handle toothbrush has a handle portion that allows a user to heat and form the handle to the shape of their hand to provide for more secure grip of the toothbrush. In one embodiment, a hand formable toothbrush has a toothbrush head attached to a shank that can be inserted into a socket within the toothbrush handle. This configuration allows for the use of replacement toothbrush heads. This makes manufacturing of higher cost handles more economical, as the formable handle portions would not be thrown out when the toothbrush head needs replacement. To customize the formable handle portion, a user may simply place the toothbrush, or handle portion of the toothbrush, in boiling water for a period of time and then remove the toothbrush handle, allow it to cool to a safe temperature and then grasp the handle to form it into the shape of their hand.