Multi-Hinge Oscillating Toothbrush Head for Brushing Comfort

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Solution Overview

Problem

Existing toothbrushes lack flexibility in their brush heads, leading to reduced comfort during brushing.

Innovation Solution

An oscillating toothbrush design featuring a brush head connected to an oscillating base with multiple hinge bases and a resilient abutting-pushing unit, allowing the brush head to oscillate at multiple angles under external forces, enhanced by a resilient member to return to an initial position.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If the brush head is molded in one piece, then the manufacturing precision is improved, but the flexibility of the brush head deteriorates

Engineering Contradiction:

Improvebrush head manufacturing precisionVSAvoidbrush head flexibility

Core Design Contradiction:

Manufacturing precisionVSAdaptability or versatility

Solution Approach 1:

The brush head is divided into multiple independent components: the oscillating rod, first hinge base, second hinge base, and fixing shaft. These segmented parts are connected through hinge joints that allow relative oscillation, enabling the brush head to adapt to different brushing directions while maintaining manufacturing precision through standardized component fabrication.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The hinge bases and oscillating rod create a dynamic structure that allows the brush head to oscillate at multiple angles under external forces. The first hinge base oscillates in a first direction while the second hinge base oscillates in a second direction, providing adaptability without compromising the precision of each component.

Inventive Principle:

Principle #15Dynamics

2Ease of operation

If the brush head is made flexible with multiple hinge bases, then the brushing comfort is improved, but the device complexity increases

Engineering Contradiction:

Improvebrushing comfortVSAvoidbrush head structure complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The oscillating base structure employs a nested arrangement where the first hinge base and second hinge base are positioned at different levels (second hinge base above the first), with the oscillating rod passing through both. This nested configuration achieves multi-directional oscillation capability while consolidating the structure into a compact form that reduces overall complexity.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Adaptability or versatility

If the oscillating rod passes through multiple hinge bases, then the oscillation adaptability is improved, but the reliability of connection deteriorates

Engineering Contradiction:

Improveoscillation adaptabilityVSAvoidconnection reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The oscillating rod serves as an intermediary element that connects the first hinge base and second hinge base. By passing through both hinge bases and the fixing shaft, it mediates the oscillation motion between these components, ensuring reliable connection while maintaining the adaptability to oscillate in multiple directions under external forces.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

Improves brushing comfort by enabling the brush head to adapt to different directions and forces, ensuring stable and reliable oscillation.

Implementation Method 1

an resilient member resilient pushing of the abutting base

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

the oscillating rod may drive the first hinge base to oscillate on the brush handle in the first direction

Methodology Applied

Scientific EffectOscillation: Harmonic Oscillator

Data Source

PatentUS12527393B2Oscillating toothbrush

Publication Date: 2026.01.20 SHANGHAI SHIFT ELECTRIC CO LTD

AI summary

This application provides an oscillating toothbrush, including a brush head, a brush handle, an oscillating base mounted on the brush handle, and an oscillating rod that connects the brush head to the oscillating base, and the oscillating base includes a first hinge base hinged to the brush handle in a first direction, a second hinge base hinged to the brush handle in a second direction, and a fixing shaft mounted on the first hinge base in the second direction, with the first direction being perpendicular to the second direction. In the present application, the oscillating base is arranged to include the first hinge base hinged to the brush handle in the first direction and the second hinge base hinged to the brush handle in the second direction. When the brush head is subjected to an external force, the oscillating rod may drive the first hinge base to oscillate on the brush handle in the first direction. In one embodiment, the oscillating rod oscillates on the fixing shaft in the second direction to further drive the second hinge base to oscillate on the brush handle in the second direction. Therefore, with the oscillation of the first hinge base and the second hinge base, the brush head is allowed to oscillate at multiple angles under external forces in different directions, to improve the comfort of toothbrushing.