Eccentric Rod Vibration Structure for Electrical Toothbrush
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Solution Overview
Problem
Conventional electrical toothbrushes experience noise and increased wind resistance due to the U-shaped notch on the weight unit of the eccentric rod, which causes imbalance and vibration.
Innovation Solution
A vibration structure for the electrical toothbrush featuring an eccentric rod with a weight section that includes an opening and a receiving space for a weight block, reducing the outer surface notch and minimizing wind resistance and noise through balanced weight distribution and a cover member to secure the weight block.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a U-shaped notch is provided on the weight unit to create unbalanced weight for vibration, then the eccentric rod can rotate and vibrate effectively, but wind resistance increases and noise is generated
Solution Approach 1:
The weight unit is divided into a main body and a separate weight block. The weight block can be independently positioned within the weight unit to adjust the center of gravity, creating the necessary unbalanced weight for vibration without requiring a large notch structure that causes wind resistance and noise.
Solution Approach 2:
Instead of creating a large notch on the outer surface, the invention concentrates the weight imbalance in a localized weight block positioned at specific locations within the weight unit. This localized approach achieves the necessary unbalanced weight for vibration while minimizing the outer surface area exposed to wind resistance.
2Object-affected harmful factors
If the outer surface notch is reduced to minimize wind resistance and noise, then the harmful factors are decreased, but the weight balance may be compromised
Solution Approach 1:
The weight unit is segmented into a main body and a separate weight block. This segmentation allows the weight block to be independently positioned within the weight unit to adjust the center of gravity, creating the necessary unbalanced weight for vibration without requiring a large notch structure that causes wind resistance and noise.
Solution Approach 2:
Instead of achieving weight imbalance through radial notches on the outer surface, the invention uses axial positioning of the weight block within the weight unit. This dimensional change from radial to axial positioning allows for weight balance adjustment without increasing the outer surface notch, thereby minimizing wind resistance and noise.
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 wind resistance and noise during rotation by optimizing weight distribution and minimizing the outer surface notch, enhancing the operational efficiency of the toothbrush.
Implementation Method 1
A weight block is disposed in the receiving space to partially or totally increase the weight of the weight section, whereby the weight section is unbalanced in weight to deflect from a central axis of the eccentric rod
Implementation Method 2
A cover member is correspondingly mated with the opening to cover the same. According to the design of the present invention, the notch on the outer surface of the weight section is reduced so that when the weight section is rotated, the wind resistance is reduced and the noise is lowered.
Data Source
AI summary
A vibration structure of electrical toothbrush includes an eccentric rod. Two ends of the eccentric rod are respectively formed with a transmission section and a weight section. The transmission section is drivable by a driving force to rotate so as to drive the weight section to eccentrically vibrate. The weight section has an opening and a receiving space inward recessed from the opening. A cover member is correspondingly mated with the opening to cover the same. A weight block is disposed in the receiving space to partially or totally increase the weight of the weight section, whereby due to the increased weight, the weight section is unbalanced in weight to deflect from a central axis of the eccentric rod.