Electric Toothbrush Vibration Damping Unit Design
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Solution Overview
Problem
Conventional electric toothbrushes transmit vibrations to the user's hand, causing discomfort and potentially degrading the accuracy of tooth cleaning over time, while reducing motor vibration to mitigate this issue compromises cleaning performance.
Innovation Solution
An electric toothbrush design incorporating a vibration damping unit made of elastic material between the outer case and vibration transmission unit, which absorbs and attenuates vibrations, reducing their transmission to the user's hand while maintaining cleaning performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If vibration motor vibration is reduced to minimize hand vibration, then user convenience is improved, but brush vibration is also reduced and cleaning performance deteriorates
Solution Approach 1:
The patent divides the vibration transmission path into separate channels: one for the brush (through the vibration transmission unit) and one for the handle (through the damping unit). This segmentation allows independent control of vibration characteristics for cleaning performance versus user comfort.
Solution Approach 2:
The vibration damping unit acts as an intermediary component between the vibration motor and the handle. It selectively transmits certain vibration frequencies to the brush while attenuating vibrations transmitted to the user's hand, serving as a mediator that resolves the contradiction between cleaning effectiveness and user comfort.
2Productivity
If vibration motor vibration is transmitted directly to the handle, then cleaning performance is maintained, but user's hand vibrates causing discomfort and reduced operational accuracy
Solution Approach 1:
The vibration damping unit serves as an intermediary that selectively filters vibration transmission. It allows necessary vibrations to reach the brush for effective cleaning while blocking excessive vibrations from reaching the user's hand, thus resolving the contradiction between maintaining cleaning performance and ensuring user comfort.
Solution Approach 2:
The patent applies different vibration transmission characteristics to different parts of the system: high vibration transmission to the brush area for cleaning effectiveness, and low vibration transmission to the handle area for user comfort. This local differentiation of vibration properties resolves the contradiction.
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 vibration damping unit effectively reduces user-hand vibrations, enhancing user convenience without degrading the toothbrush's cleaning performance by absorbing and attenuating vibrations, thus improving user experience and maintaining effective cleaning.
Implementation Method 1
a vibration damping unit which is provided between the outer case and the vibration transmission unit
Implementation Method 2
An electric toothbrush design incorporating a vibration damping unit made of elastic material between the outer case and vibration transmission unit, which absorbs and attenuates vibrations
Data Source
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AI summary
The present disclosure relates to an electric toothbrush, and more particularly, to an electric toothbrush including: a main body which includes an outer case; a cleaning body which is coupled to the main body and has a cleaning head formed at one end thereof; a vibration transmission unit which couples the main body and the cleaning body, has a vibration generator mounted thereon to generate vibration, and transmits the vibration to the cleaning body; and a vibration damping unit which is provided between the outer case and the vibration transmission unit, thereby maintaining cleaning performance of the electric toothbrush, reducing magnitude of vibration to be transmitted to a user, and improving convenience for the user.