Capillary Toothbrush Indicator Fluid for Depletion Detection
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Solution Overview
Problem
Users of toothbrushes with fluid delivery systems cannot visually determine when the oral care fluid in the reservoir has been depleted, leading to uncertainty about when to replace the fluid.
Innovation Solution
Incorporating an indicator fluid of a different color than the oral care fluid, which is immiscible with it, into the toothbrush reservoir, allowing the indicator fluid to be delivered to a visible portion of the delivery member via capillary action when the oral care fluid is depleted, providing a visual indication of depletion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fluid delivery system is used in a toothbrush, then the oral care fluid can be delivered to the user's oral cavity, but the user cannot determine when the fluid has been depleted
Solution Approach 1:
The patent applies color changes by using an indicator fluid with a different color than the oral care fluid. When the oral care fluid is depleted, the indicator fluid becomes visible in the reservoir, providing a visual signal to the user that the fluid needs replacement. This resolves the information loss problem while maintaining the fluid delivery function.
Solution Approach 2:
The patent uses an indicator fluid as an intermediary substance that provides visual information about the oral care fluid's depletion status. The indicator fluid acts as a mediator between the oral care fluid and the user, enabling the user to detect fluid levels without directly observing the oral care fluid itself.
2Loss of information
If an indicator fluid is added to the reservoir, then visual indication of depletion is provided, but the device complexity increases
Solution Approach 1:
The patent merges the indicator function with the fluid delivery system by incorporating the indicator fluid directly into the reservoir alongside the oral care fluid. This integration approach provides visual indication without requiring separate monitoring devices or complex additional components, thus minimizing the increase in device complexity.
Solution Approach 2:
The indicator fluid provides self-service by automatically indicating fluid depletion status without requiring user intervention or external monitoring systems. The visual indication occurs naturally as the oral care fluid is used, eliminating the need for additional sensors, batteries, or electronic components.
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 solution allows users to easily identify when the oral care fluid has been depleted by a color change in the delivery member, ensuring timely replacement and maintaining the effectiveness of the toothbrush.
Implementation Method 1
The oral care fluid and the indicator fluid are delivered to an applicator via capillary action
Implementation Method 2
When the oral care fluid is close to depletion, the indicator fluid becomes visible to a consumer
Data Source
AI summary
A method of providing a visual indication of depletion of an oral care fluid. In one aspect, the method provides a visual indication of depletion of an oral care fluid contained within a reservoir of an oral care implement having a delivery member formed of a capillary material. The method includes: a) providing an indicator fluid in the reservoir with the oral care fluid, the oral care fluid being a different color than the indicator fluid and immiscible with respect to the indicator fluid; and b) upon depletion of the oral care fluid from the reservoir, delivering the indicator fluid to a visible portion of the deliver member.