Electric Toothbrush Core Assembly With Peristaltic Toothpaste Feed
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Solution Overview
Problem
Conventional electric toothbrushes with pneumatic systems have complex structures due to the need for air intake and outtake structures, leading to a large size and difficulty in carrying, and are prone to toothpaste overflow and bubble formation, with stability issues in varying air pressures.
Innovation Solution
A core assembly using a peristaltic pump and a hollow rotating shaft in the motor to deliver toothpaste, eliminating the need for air pressure systems and simplifying the structure, allowing for a compact and lightweight design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an air pump is used to push toothpaste, then toothpaste can be delivered, but the structure becomes complex and size increases
Solution Approach 1:
The patent extracts and eliminates the air pump and pneumatic system from the toothbrush structure. Instead of using gas pressure to push toothpaste, the invention uses a peristaltic pump mechanism that directly pushes toothpaste through compression of a flexible tube, removing the need for air intake and outtake structures entirely
Solution Approach 2:
The patent replaces the pneumatic system (air pump, gas pressure mechanism) with a direct mechanical peristaltic pumping system. The motor-driven peristaltic pump uses mechanical compression of a flexible tube to push toothpaste, substituting the indirect pneumatic mechanism with a direct mechanical action that is more compact and simpler in structure
2Reliability
If air outtake structure is added to prevent toothpaste overflow, then overflow is prevented, but structure complexity increases
Solution Approach 1:
The patent removes the need for air outtake structures, gas discharge valves, and waterproof gas-permeable membranes by eliminating the pneumatic system entirely. The peristaltic pump's direct mechanical action provides precise control over toothpaste delivery without generating residual gas pressure that would require discharge mechanisms
Solution Approach 2:
The peristaltic pump mechanism inherently controls toothpaste flow through its compression-release cycle, automatically preventing overflow without requiring additional discharge valves or outtake structures. The system self-regulates the toothpaste delivery through the rhythmic compression of the flexible tube
3Productivity
If pneumatic device is used, then toothpaste can be pushed, but bubbles form at top cover
Solution Approach 1:
The patent replaces the pneumatic pushing mechanism with a direct mechanical peristaltic pump that compresses a flexible tube containing toothpaste. This mechanical compression method does not involve gas pressure changes that would cause bubble formation at the top cover, eliminating the harmful effect while maintaining toothpaste delivery functionality
4Productivity
If air pump is used, then toothpaste delivery is achieved, but hermeticity requirements increase
Solution Approach 1:
The patent extracts and removes the air pump and all associated pneumatic components from the system. By eliminating the need for gas pressure generation and transmission, the invention removes the hermeticity requirements that would otherwise be necessary to prevent leakage and maintain pressure integrity in the pneumatic system
Solution Approach 2:
The patent uses a flexible tube that can be compressed externally by the peristaltic pump mechanism. This tube copies the function of a pressure vessel but without requiring hermetic sealing, as the toothpaste is pushed by external tube compression rather than internal gas pressure
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 reduces the size and complexity of the toothbrush, prevents toothpaste overflow, and maintains stable toothpaste delivery without air pressure dependence, enhancing user experience and usability in diverse environments.
Implementation Method 1
a peristaltic pump, a first end of the peristaltic pump being coupled to the toothpaste chamber, and a second end of the peristaltic pump being coupled to a second end of the hollow rotating shaft
Data Source
AI summary
The present disclosure provides a core assembly, an electric toothbrush, a control method and a relevant device, and it relates to the field of health care technology. The core assembly includes: a motor including a hollow rotating shaft, a first end of the hollow rotating shaft being coupled to the toothbrush head; a peristaltic pump, a first end of the peristaltic pump being coupled to the toothpaste chamber, and a second end of the peristaltic pump being coupled to a second end of the hollow rotating shaft; and a control assembly electrically coupled to the peristaltic pump, and configured to control the peristaltic pump to transfer toothpaste in the toothpaste chamber through the hollow rotating shaft to the toothbrush head, the control assembly being further electrically coupled to the motor and configured to control the motor to operate so as to enable the toothbrush head to vibrate.