Motorized Interdental Brush Layout for Watertight Vibration Drive
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Solution Overview
Problem
Existing interdental brushes face issues with high assembly complexity, leading to high costs and poor reliability, and difficulty in creating a watertight device.
Innovation Solution
A motorized interdental brush design with a rotation-translation conversion mechanism, featuring an angled electric motor and a vibrating rod, utilizing a toothed wheel and yoke to convert rotary motion into linear motion, with a sealed chamber for waterproofing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a motorized interdental brush with rotation-translation conversion mechanism is used, then cleaning effectiveness is improved, but device complexity increases
Solution Approach 1:
The patent applies mechanical vibration by using an eccentric mechanism (eccentric cam or offset crank) within the rotation-translation conversion system. The eccentric protrusion on the rotating element creates periodic displacement of the brush head along its axis, generating vibratory motion that enhances plaque removal effectiveness while maintaining a relatively simple overall device structure.
2Ease of manufacture
If traditional assembly methods are used, then manufacturing is easier, but reliability decreases
Solution Approach 1:
The patent merges multiple functional components into an integrated assembly. The rotation-translation conversion mechanism combines the motor, transmission elements (toothed wheel, pinion, eccentric protrusion), and brush head mounting into a unified structure that maintains reliability through proper integration while remaining manufacturable using standard assembly techniques.
3Object-affected harmful factors
If a watertight design is implemented, then oral hygiene effectiveness is improved, but assembly complexity increases
Solution Approach 1:
The patent employs sealing elements such as O-rings or gaskets (flexible sealing films) at critical interfaces within the brush housing. These flexible sealing components create watertight barriers between the motor chamber and the oral environment, preventing moisture ingress without requiring complex multi-layer sealing structures or difficult-to-assemble tight-fitting components.
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 reduces assembly complexity, enhances reliability, and ensures a watertight structure while effectively cleaning interdental spaces.
Implementation Method 1
an electric motor controlling a vibratory movement of said brushing head
Implementation Method 2
a yoke fixed to the distal end of said rod having an oblong slot cooperating with an eccentric protrusion formed on the surface of said toothed wheel
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to a motorized interdental brush comprising a brush head (200) extended by a rod (320), and a body (100) incorporating an electric motor (10) controlling a vibratory movement of said brush head (200) characterized in that 1. The ALmotor axis of said motor (10) forms with the ALrod axis of said rod (320) an angle between 70° and 180° 2. said electric motor (10) cooperates with said rod (320) by means of a rotation-translation conversion mechanism (300) comprising: a. a toothed wheel (350) disposed in a plane parallel to the plane defined by the ALmotor axis and the ALrod axis b. a yoke (310) fixed to said rod (320) having an oblong slot cooperating with an eccentric protuberance (352) formed on the surface of said gear (320) c. said gear (350) being driven by a pinion (12) fixed on the shaft of the motor (10).