Electric Toothbrush Drive Frame for Low-Vibration Head Oscillation

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Solution Overview

Problem

Existing electric toothbrushes have large, complex, and costly drive mechanisms with high energy consumption, loud noise, and significant vibration attenuation from the handle to the toothbrush head.

Innovation Solution

An electric toothbrush design featuring a support frame and drive frame connected by elastic parts, with a motor driving the drive frame to swing or vibrate relative to the support frame, reducing vibration transmission to the handle and enhancing brushing efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a built-in eccentric vibration motor is used, then the toothbrush can produce high-frequency vibration to clean teeth effectively, but the drive mechanism becomes large in size, complex in structure, and high in cost

Engineering Contradiction:

Improvebrushing effectivenessVSAvoiddrive mechanism complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The toothbrush is divided into separate functional modules: a handle assembly containing the motor and a separate head assembly. The motor drives the head through a transmission mechanism, separating the vibration generation function from the brushing function. This modular segmentation simplifies the overall drive mechanism while maintaining effective cleaning performance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A transmission mechanism acts as an intermediary between the motor and the toothbrush head. This intermediary component transfers and transforms the motor's rotation into the required vibration or oscillation motion for the head, reducing the complexity of the direct drive mechanism while preserving brushing effectiveness.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If a built-in eccentric vibration motor is used, then the toothbrush can produce high-frequency vibration, but the toothbrush handle experiences strong vibration and loud noise

Engineering Contradiction:

Improvebrushing effectivenessVSAvoidhandle vibration and noise

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The harmful vibration and noise are extracted and isolated from the handle assembly through the separation of the motor and head into different modules. The transmission mechanism and coupling structures are designed to contain the vibration within the head assembly, preventing it from propagating to the handle and reducing noise transmission to the user.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The vibration that would normally be transmitted harmfully to the handle is instead channeled and concentrated at the toothbrush head where it is needed for effective cleaning. The transmission mechanism converts the motor's rotation into beneficial oscillation at the head while the structural design prevents harmful vibration propagation to the handle.

Inventive Principle:

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

3Productivity

If a built-in eccentric vibration motor is used, then the toothbrush can produce high-frequency vibration, but there is large attenuation of the vibration output to the toothbrush head and high energy consumption

Engineering Contradiction:

Improvebrushing effectivenessVSAvoidenergy consumption

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The traditional mechanical eccentric vibration motor is replaced with a more efficient transmission system that reduces energy loss. The new mechanism uses a motor coupled with a transmission assembly that directly drives the head oscillation, minimizing mechanical energy dissipation and improving the efficiency of vibration transmission from the motor to the brushing surface.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

Reduces energy consumption, improves brushing effectiveness, enhances user comfort by minimizing handle vibration, and extends the toothbrush's service life through shock absorption and structural stability.

Implementation Method 1

the drive frame and the support frame are connected through a connecting part and elastic parts... the motor is able to drive the drive frame to swing or vibrate relative to the support frame

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Implementation Method 2

a shock absorber is provided in a gap between the drive frame and the support frame, the shock absorber is elastic, and when the drive frame swings or vibrates, the shock absorber can buffer an impact of the drive frame on the support frame

Methodology Applied

Scientific EffectShock absorption: Damping

Data Source

PatentUS20260108337A1Electric toothbrush

Publication Date: 2026.04.23 CIXI SEAGO ELECTRONICS CO LTD

AI summary

The present disclosure provides an electric toothbrush, comprising: a support frame provided with a hollow part; a drive frame, wherein the drive frame is elastically connected to the support frame, the drive frame is located in the hollow part, the drive frame and the support frame are spaced apart, the drive frame has a drive shaft connector for connecting a toothbrush head; and a motor, wherein the motor is provided on the drive frame, the motor is able to drive the drive frame to swing or vibrate relative to the support frame during operation, so that the drive shaft connector can drive the toothbrush head to swing or vibrate.