Electric Toothbrush Head Vibration Assembly with Square Shaft
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Solution Overview
Problem
Existing electric toothbrushes have complex internal structures, leading to high production costs, instability, and difficulty in flexible replacement of brush heads, which affects their usability and cleaning efficiency.
Innovation Solution
A novel electric toothbrush replacement head device with a simplified structure featuring a rotating cover and vibration assembly, including a square shaft, connecting seat, and soft rubber sleeve, allowing for easy installation and disassembly, improved transmission efficiency, and enhanced cleaning performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rapid rotation motor with transmission components is used to drive brush head vibration, then cleaning effect is improved, but device complexity and production cost increase
Solution Approach 1:
The patent extracts and removes the complex transmission components (gears, belts, etc.) from the electric toothbrush structure, directly connecting the motor to the brush head. This extraction eliminates unnecessary intermediate parts while maintaining the vibration-driven cleaning effect, thereby reducing device complexity and production cost.
Solution Approach 2:
Instead of using a rapid rotation motor with transmission components to indirectly drive the brush head, the patent inverts the approach by using a vibration motor that directly generates oscillating motion. This inversion eliminates the need for transmission components and directly achieves the desired cleaning effect through vibration.
2Reliability
If multiple assembly parts are used for motor transmission, then cleaning performance is improved, but production and processing cost increase
Solution Approach 1:
The patent removes multiple assembly parts from the transmission system, leaving only the essential motor and brush head components. This extraction reduces the number of parts that need to be produced, processed, and assembled, thereby lowering production and processing costs while maintaining cleaning performance.
Solution Approach 2:
The patent merges the motor and brush head into a more integrated structure, reducing the number of separate assembly parts. By combining functions and reducing part count, the manufacturing process becomes simpler and less costly, while the cleaning performance is preserved through direct vibration transmission.
3Power
If complex internal structure with many assembly parts is used, then transmission capability is improved, but structural stability deteriorates
Solution Approach 1:
The patent extracts and removes the complex internal transmission structure with multiple assembly parts, replacing it with a simplified direct-drive configuration. This extraction eliminates the structural instability caused by numerous interconnected components while maintaining sufficient transmission capability through direct motor-to-brush-head connection.
Solution Approach 2:
Instead of using a complex transmission system to achieve vibration transmission, the patent inverts the approach by using a vibration motor that directly generates and transmits oscillating motion to the brush head. This inversion simplifies the structure and improves stability by eliminating intermediate transmission components that could fail or become loose.
4Strength
If traditional fixed brush head design is used, then structural integrity is improved, but flexibility and convenience of replacement deteriorate
Solution Approach 1:
The patent segments the electric toothbrush into a main body and a replaceable brush head portion, with the vibration assembly positioned to enable easy detachment. This segmentation allows the brush head to be easily replaced while maintaining structural integrity through proper connection and fixation mechanisms designed for user-friendly assembly and disassembly.
Data Source
AI summary
An electric toothbrush replacement head device is provided, including a brush head portion, which is provided with a toothbrush handle and a toothbrush head. A rotating cover is disposed adjacent to an end of the brush head portion. A vibration assembly is disposed in the rotating cover, and includes a first fixed plate, a size of which corresponds to an inner diameter of the rotating cover. The first fixed plate is provided with a space-keeping slot therein, a square shaft thereof, and a connecting seat thereon. An end of the square shaft is connected to the brush head potion through the space-keeping slot. An opposite end of the square shaft is connected to the connecting seat. The device is designed with a simple structure, which is flexible for installation and disassembly, and more convenient for use, furthermore, improves transmission efficiency and possesses various functions.