Metal Electric Toothbrush Housing Structure for Waterproof Charging
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Solution Overview
Problem
Current electric toothbrushes face issues with waterproofing failures due to loose connections in their charging components and difficulty in cleaning plastic housings, which can lead to aging and reduced effectiveness.
Innovation Solution
A housing structure comprising a metal outer housing with a narrowing section and an adhesively connected inner housing, featuring a power-connecting component buckled into the narrowing section, along with a sealing ring and snap connections, enhances sealing and simplifies assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastic housing is used, then ease of manufacture is improved, but cleaning difficulty increases and aging occurs
Solution Approach 1:
The patent changes the material parameter from plastic to metal for the housing. This material substitution fundamentally alters the surface properties, making the housing easier to clean and resistant to aging while maintaining manufacturing feasibility through established metal fabrication processes
Solution Approach 2:
The patent employs a composite structure combining metal outer housing with plastic inner housing. This composite approach leverages the ease of manufacture of plastic for internal components while using metal for the external housing to eliminate cleaning difficulties and aging issues
2Adaptability or versatility
If segmented charging components are used, then adaptability is improved, but waterproof reliability deteriorates
Solution Approach 1:
The patent merges the charging components into an integrated structure where the power-connecting component is buckled into the inner housing and abuts against the narrowing section. This consolidation eliminates segmented connections, ensuring waterproof reliability while maintaining charging functionality
Solution Approach 2:
The power-connecting component is nested within the inner housing, with the outer housing providing an additional protective layer. This nested arrangement ensures that the charging components are sealed within the housing structure, preventing water ingress while maintaining adaptability
3Ease of operation
If detachable battery compartment is used, then ease of operation is improved, but waterproof reliability deteriorates
Solution Approach 1:
The patent merges the battery compartment with the inner housing structure, eliminating detachable connections. The battery compartment is integrated into the inner housing, which is itself integrated into the outer housing, creating a sealed waterproof structure while maintaining ease of operation through simplified assembly
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 solution improves waterproofing by preventing loosening of components, simplifies cleaning, and maintains structural integrity, reducing gaps and enhancing aesthetics.
Implementation Method 1
an inner housing, nested within the outer housing and adhesively connected to an inner wall of the outer housing
Implementation Method 2
the power-connecting component is connected to an inner wall of the inner housing in a buckled manner
Implementation Method 3
an outer wall of the power-connecting component is provided with an accommodating groove accommodating a sealing ring
Data Source
AI summary
A housing structure of an electric toothbrush is disclosed. An end of the handle body is provided with a brush head, and the handle body includes an outer housing and an inner housing. The outer housing is made of metal. An end of the outer housing away from the brush head is provided with a narrowing section having a gradually decreasing inner diameter. The inner housing is nested within the outer housing and is adhesively connected to an inner wall of the outer housing. A power-connecting component is inserted into the end of the inner housing, and the power-connecting component is connected to an inner wall of the inner housing in a buckled manner. The power-connecting component is located in the narrowing section, and a radial outer wall of the power-connecting component abuts against an inner wall of the narrowing section.