Toothbrush Head Magnetic Eccentric Shaft Vibration

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Solution Overview

Problem

Rotating-type electric toothbrushes often generate vibration and noise due to the rotation of the toothbrush round head, which negatively impacts user experience.

Innovation Solution

A toothbrush head design featuring a toothbrush round head with bristles and a first connecting structure, a large body with a mounting groove and a rotatably connected mounting base, and an eccentric inner shaft with a transmission structure, utilizing magnetic suction members to enhance the connection between the round head and the mounting base, thereby reducing vibration and noise.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a toothbrush round head is rotated in a rotating-type electric toothbrush, then the oral cavity can be cleaned, but vibration and noise are generated which affects user experience

Engineering Contradiction:

Improvecleaning functionVSAvoidvibration and noise

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent introduces an eccentric inner shaft that converts the harmful vibration into a beneficial function. The eccentric shaft's offset rotation creates controlled vibration that enhances the cleaning effect on teeth while the magnetic suction mechanism suppresses unwanted noise and instability, thus converting harmful vibration into a useful cleaning enhancement

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent employs magnetic suction members that create a counteracting force to stabilize the rotating toothbrush round head. The magnetic attraction between the magnetic suction iron post and magnetic suction members provides a stabilizing force that counterbalances the harmful vibration and noise, reducing their impact on user experience

Inventive Principle:

Principle #8Anti-weight (Counterweight)

2Ease of operation

If the connection between toothbrush round head and mounting base is loose, then assembly is easy, but vibration and noise increase during rotation

Engineering Contradiction:

Improveassembly easeVSAvoidvibration and noise

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent replaces traditional mechanical fastening methods with a magnetic suction system. The magnetic attraction between the magnetic suction iron post and magnetic suction members provides a secure connection that reduces vibration and noise during rotation, while maintaining ease of assembly and disassembly through simple magnetic attachment without complex mechanical fasteners

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Object-affected harmful factors

If magnetic suction members are added to enhance connection, then vibration and noise are reduced, but device complexity increases

Engineering Contradiction:

Improvevibration and noise reductionVSAvoidstructure complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The magnetic suction system serves multiple functions simultaneously: it provides structural connection between the toothbrush round head and mounting base, suppresses vibration during rotation, and reduces noise. This multi-functionality justifies the added complexity by eliminating the need for separate vibration damping components and mechanical fasteners

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 effectively reduces the slit between the toothbrush round head and the mounting base, resulting in a tighter and more stable connection, which significantly minimizes vibration and noise during rotation, enhancing user experience.

Implementation Method 1

Two magnetic suction members attracting to each other are provided within the sleeve head. The two magnetic suction members are located on the opposite sides of the magnetic suction iron post. With the magnetic suction force between the two magnetic suction members and the magnetic suction force of the two magnetic suction members on the magnetic suction iron post, a slit between the toothbrush round head and the mounting base may be reduced

Methodology Applied

Scientific EffectMagnetic suction: Magnetism

Data Source

PatentUS20250114179A1Toothbrush Head

Publication Date: 2025.04.10 HU HANBAO

AI summary

The present invention discloses a toothbrush head, including a toothbrush round head, a large body, and an eccentric inner shaft. The toothbrush round head is provided with bristles on one side and a first connecting structure on the other side. The large body is provided with a mounting groove. The mounting groove is provided therein with a mounting base. The mounting base is provided with a second connecting structure that cooperates with the first connecting structure. The sleeve head is provided with a rotating hole corresponding to a shape of the rotating shaft, the rotating shaft is provided therein with a magnetic suction iron post. With the magnetic suction force between the two magnetic suction members and the magnetic suction force on the magnetic suction iron post, so that the connection between the toothbrush round head and the mounting base is tighter and more stable.