Power Toothbrush Mode Selection via Pre-Activation LED Feedback
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Solution Overview
Problem
Existing power toothbrushes lack a user-friendly interface for selecting operational modes, as they often provide no visual feedback for mode selection and are difficult to operate without causing toothpaste or liquid splatter when trying to access mode buttons while the device is in use.
Innovation Solution
A toothbrush handle with a microprocessor-controlled drive system, featuring a push button switch for mode selection that allows users to choose modes before powering on, and LED indicators to provide visual confirmation of selected modes, enabling mode selection and confirmation outside of the device's operational state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mode button is provided for selecting operational modes, then the toothbrush can operate in various vibrational modes (normal, soft, massage), but the interface becomes cumbersome and creates confusion for the average user
Solution Approach 1:
The mode selection interface is segmented into distinct visual indicators (LED lights) for each operational mode (normal, soft, massage). Each LED corresponds to a specific mode, allowing users to easily identify and select desired modes without confusion from a complex interface
Solution Approach 2:
Different colored LED indicators are used to represent different operational modes. The color changes provide intuitive visual feedback to users about which mode is currently selected or active, simplifying the user interface while maintaining multiple operational modes
2Ease of operation
If the mode button is operated to select a desired mode when the toothbrush is operating out of the mouth, then mode selection is possible, but splattering of toothpaste or liquid present on the toothbrush will result
Solution Approach 1:
The system allows users to pre-select their desired operational mode using the mode button and visual indicators before activating the toothbrush with the power button. This preliminary mode selection occurs while the brush is stationary and out of the mouth, preventing any splattering during the selection process
Solution Approach 2:
The mechanical action of mode selection during operation is replaced with an electronic system where mode selection is done beforehand through button presses that trigger visual LED indicators. The microprocessor stores the selected mode and activates it when power is applied, eliminating the need to operate mode buttons during brushing
3Loss of information
If no visual feedback is provided for mode selection, then the device structure remains simple, but there is no possibility of visual feedback to ensure that the desired mode has actually been selected
Solution Approach 1:
Visual feedback is provided through LED indicators that illuminate to confirm which operational mode has been selected. When a user presses the mode button, the corresponding LED lights up to provide immediate visual confirmation of the selected mode, ensuring the user knows which mode will be active when the toothbrush is powered on
Solution Approach 2:
The LED indicator system serves multiple functions: it provides visual feedback for mode selection, confirms the selected mode to the user, and can potentially indicate operational status. This multi-functional approach provides comprehensive information feedback without significantly increasing device complexity
Data Source
Figure 1
Figure 2~3
AI summary
A toothbrush handle portion (10) having: - a drive system (16) for moving a brushhead (18); - a first switch (25) operable by the user to control the ON/OFF condition of the toothbrush; -a second switch (29) being a push button switch, operable by a user during the time that the first switch is in its OFF condition, to select one of a plurality of possible modes of operation established in the toothbrush, wherein when the second switch is operated to select a particular mode of operation, the toothbrush will then operate in that particular mode when the ON/OFF switch is thereafter operated to an ON condition; and an indicator means (31) for indicating which mode has been selected, characterized in that the toothbrush handle further comprises: - a microprocessor (22) which is programmed to control the operation of the drive system (16) to produce a desired brushhead movement; and wherein the second switch (29) is operated to select a particular mode available in the microprocessor (22) prior to the application of power to the brushhead (18).