Magnetically Driven Toothbrush Head with Twisting Plates
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Solution Overview
Problem
The existing magnetically driven electric toothbrush heads have a limited reciprocating rotation amplitude, resulting in a poor use effect due to insufficient vibration, which affects cleaning efficiency and blood circulation promotion.
Innovation Solution
A magnetically driven electric toothbrush head design featuring a movable board, screw cap, and twisting plates with a rubber sleeve and rubber strip, where the movable board is connected to a driving shaft, and an electromagnet in the handle drives the board and shaft to rotate reciprocally, enhancing the twisting amplitude and rotation orderliness through a magnetic and elastic mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnetically driven mechanism is used to drive the toothbrush head, then the structure is simplified and reliability is improved, but the reciprocating rotation amplitude is insufficient resulting in poor use effect
Solution Approach 1:
The patent applies the dynamics principle by transforming the static magnetic attraction between the electromagnet and permanent magnet into dynamic reciprocating rotation motion. The magnetic drive mechanism converts electrical energy to magnetic energy and then to mechanical motion, enabling the toothbrush head to rotate reciprocally with enhanced amplitude. This dynamic conversion resolves the contradiction by maintaining system reliability while significantly improving the use effect through increased rotation amplitude.
Solution Approach 2:
The patent employs parameter changes by optimizing the magnetic field strength, magnet arrangement, and mechanical leverage ratios in the drive mechanism. By adjusting these parameters, the system achieves both high reliability through simplified magnetic drive and improved use effect through enhanced rotation amplitude. The parameter optimization allows the magnetic drive to overcome the limitation of insufficient rotation while maintaining structural simplicity.
2Productivity
If the reciprocating rotation amplitude is increased to improve cleaning efficiency, then the use effect is enhanced, but the structural complexity increases
Solution Approach 1:
The patent replaces complex mechanical vibration mechanisms with a simplified magnetic drive system that naturally produces reciprocating rotation. Instead of using traditional mechanical oscillators or motors with complex linkages, the system uses magnetic field interaction to directly drive the toothbrush head, achieving high rotation amplitude with minimal structural complexity. This substitution resolves the contradiction by eliminating the need for complex mechanical components while maintaining high cleaning efficiency.
Solution Approach 2:
The patent optimizes key parameters including magnet size, magnetic field strength, and lever arm length to achieve high rotation amplitude without increasing structural complexity. By carefully tuning these parameters, the system maximizes cleaning efficiency through enhanced reciprocating rotation while keeping the overall structure simple and manageable.
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 design increases the twisting amplitude of the driving shaft, improving the cleaning efficiency and extending the service life of the toothbrush head by ensuring a more orderly and effective reciprocating rotation, thus enhancing the overall performance and longevity of the device.
Implementation Method 1
under a magnetic effect between the electromagnet and the two permanent magnets and a distortion limit of the twisting plates, the movable board drives the driving shaft and the brush body to rotate synchronously and reciprocatingly
Implementation Method 2
two twisting plates are arranged in intervals between the fixed frame and the movable board... a resistance of the twisting plate to distortion is less than the resistance to bending
Data Source
AI summary
A magnetically driven electric toothbrush head includes a brush body, a movable board and a screw cap with a cavity. A fixed frame is arranged in the cavity. Two spaced twisting plates are connected between the fixed frame and the movable board. The movable board is connected with a driving shaft extending through the fixed frame and the elastic cover is fixedly connected with the brush body. The bottom of the movable board is provided with permanent magnets. When the screw cap is connected to the brush handle, under the magnetic effect between the electromagnet and the permanent magnets and the distortion restriction of the twisting plates, the movable board drives the driving shaft and the brush body to rotate reciprocatingly and synchronously. The lower part of the twisting plate is exposed to form a twisting section which is connected to the driving shaft via a rubber strip.