Electric Toothbrush Magnetic Rotation Control
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Solution Overview
Problem
Existing electric toothbrushes with mechanical spring systems for controlling motor rotation direction are prone to durability issues, material degradation, and increased force requirements due to elastic deformation, leading to potential pathological conditions and faulty operation.
Innovation Solution
The use of magnetic means, including a set of permanent magnets, to control the electric motor rotation direction, replacing mechanical springs and providing a more durable and reliable solution for toothbrush operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical springs are used to control motor rotation direction, then the toothbrush can change rotation direction automatically, but the spring durability is limited and material degradation occurs
Solution Approach 1:
The patent replaces the mechanical spring system with a magnetic field-based control system. Permanent magnets mounted on the head interact with corresponding magnets in the handle to generate magnetic forces that control the rotation direction switch, eliminating mechanical contact and wear associated with springs.
Solution Approach 2:
The patent changes the physical state and properties of the coupling means from mechanical elastic deformation (springs) to magnetic field interaction (permanent magnets). This parameter change transforms the control mechanism from one subject to material degradation to one that is inherently more durable and resistant to environmental factors.
2Ease of operation
If mechanical springs are used for rotation control, then the system can maintain standby position, but increased force is required leading to pathological conditions
Solution Approach 1:
The magnetic field-based control system replaces mechanical springs, providing more efficient force transmission. The magnetic forces can precisely control the head position and rotation direction with minimal force requirement, reducing the risk of gum damage while maintaining proper standby position.
3Reliability
If mechanical springs are used in the coupling system, then rotation direction can be switched, but material corrosion and elastic deformation occur
Solution Approach 1:
The patent replaces mechanical springs with permanent magnets mounted on the head that interact with magnets in the handle. This substitution eliminates the problems of material corrosion and elastic deformation associated with mechanical springs, as magnetic fields do not degrade from water exposure or chemical contaminants.
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 magnetic system ensures consistent and durable control of the toothbrush motor rotation direction, reducing the risk of faulty operations and pathological conditions by eliminating the limitations of mechanical spring systems, such as material degradation and increased force requirements.
Implementation Method 1
The coupling technical means are magnetic means. The magnetic means can be a set of magnets, preferably permanent magnets, mounted on the head and on the handle.
Implementation Method 2
The set of magnets can comprise at least three magnets: two utmost magnets mounted on the head or on the handle and middle magnet mounted on the handle or on the head respectively, wherein the magnets are arranged in such a way, that the middle magnet remains constantly within the range of influence from the field from utmost magnets.
Data Source
AI summary
An electric toothbrush having a head part with a rotating working element is described in detail. The electric toothbrush is equipped with elements configured and arranged to cooperate in driving the working element and to change the direction of its rotating movement.