Brushhead Engaging Assembly Vibration Stability
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Solution Overview
Problem
Existing power toothbrushes experience unstable vibration due to misalignment and offset of elastic members in the engaging assembly, leading to unsatisfactory teeth cleaning.
Innovation Solution
A brushhead design with an engaging assembly that includes a main body and a detachably mounted elastic member, where the elastic member directly abuts the driving shaft, is embedded in a specific cavity configuration to prevent offsetting and ensure stable connection, using materials like beryllium copper or stainless steel for the elastic member and ABS or PP plastic for the brushhead element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the elastic member is sleeved at the outside of the engaging assembly, then the connection between brush handle and brushhead is secured, but the elastic member is prone to offset and misalignment during use
Solution Approach 1:
The elastic member is divided into multiple independent elastic elements (first elastic element, second elastic element, third elastic element, fourth elastic element) arranged at different positions. Each element independently abuts against the driving shaft, distributing the connection function across multiple segments to prevent offset and misalignment of a single element.
Solution Approach 2:
Multiple elastic elements are combined within the engaging assembly to work together, providing both securing force and alignment stability. The combination of multiple elements compensates for individual element displacement, maintaining overall connection reliability and alignment precision.
2Reliability
If the elastic member is sleeved at the outside of the engaging assembly, then the connection is secured, but the vibration of the power toothbrush becomes unstable
Solution Approach 1:
The single elastic member is segmented into multiple elastic elements positioned at different locations around the driving shaft. This segmentation ensures that vibration forces are distributed evenly, preventing unstable vibration while maintaining secure connection through the collective action of all elastic elements.
Solution Approach 2:
Each elastic element is positioned at a specific location to provide localized elastic support. The first and second elastic elements are arranged along the longitudinal direction, while the third and fourth elastic elements are arranged along the transverse direction, creating uniform local support around the driving shaft for stable vibration.
3Device complexity
If the elastic member directly abuts against the driving shaft, then the structure is simplified, but the elastic member may detach during use
Solution Approach 1:
The elastic elements are pre-installed within the engaging assembly in a predetermined arrangement before use. The first elastic element abuts against the driving shaft from the first direction, the second elastic element from the second direction, and the third and fourth elastic elements from the third direction, ensuring they are preliminarily positioned to prevent detachment while maintaining simple direct abutment structure.
Solution Approach 2:
The elastic elements are arranged in multiple spatial dimensions (longitudinal direction and transverse direction) around the driving shaft. This multi-dimensional arrangement prevents detachment by providing support from multiple directions, while the overall structure remains simple with direct abutment rather than complex mounting mechanisms.
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
This design enhances the stability and firm connection between the brushhead and handle, resulting in improved vibration stability and teeth cleaning effectiveness.
Implementation Method 1
An elastic member is arranged on the engaging assembly to provide an elastic force to abut against the driving shaft
Data Source
AI summary
The present disclosure provides a brushhead for a power toothbrush detachably, and the power toothbrush. The brushhead configured for a power toothbrush, the brushhead being detachably installed on a handle of the power toothbrush, the brushhead comprising: a brushhead element and an engaging assembly arranged in the brushhead element, wherein the engaging assembly receives a driving shaft therein within and is configured to be driven by the driving shaft to vibrate, and wherein the engaging assembly comprises a main body and an elastic member, the elastic member is a stand-alone element arranged on the main body, and the elastic member abuts against the driving shaft.