Elastically-pressed Toothbrush Head Vibration Stability
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Solution Overview
Problem
Existing electric toothbrush technologies face instability in vibration transmission due to hard contact between the vibration unit and the toothbrush head's guiding channel, leading to inefficient brushing and potential disengagement during use.
Innovation Solution
The elastically-pressed electric toothbrush head features a plug-in unit with a friction arm and elastic arm forming a pressing channel, utilizing a concave-convex structure and elastic rubber block to securely clamp the vibration unit, ensuring stable vibration transmission through elastic deformation and tension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If direct hard contact is used between the vibration unit and the guiding channel, then the structure is simple, but the vibration transmission is unstable and may affect connection reliability
Solution Approach 1:
An elastic pressing component is introduced as an intermediary between the vibration unit and the guiding channel. This component includes an elastic pressing section with a pressing surface that contacts the vibration unit, and a friction pressing section with a friction surface. The intermediary transforms the direct hard contact into an elastic friction-based connection, improving vibration transmission stability while maintaining structural simplicity.
Solution Approach 2:
The pressing component utilizes elastic deformation parameters to achieve stable connection. The elastic pressing section deforms elastically under the vibration unit's weight and vibration forces, maintaining consistent contact pressure. The friction surfaces utilize friction coefficients to transmit vibrations effectively. By changing from rigid contact to elastic friction contact, the system achieves both simplicity and reliability.
2Reliability
If elastic pressing structure is used to improve vibration transmission stability, then the connection reliability is improved, but the device complexity increases
Solution Approach 1:
The pressing component merges multiple functions into a single integrated structure. It combines the elastic pressing function (through the elastic pressing section), the friction transmission function (through the friction pressing section with concave-convex structures), and the positioning function (through the fitting relationship with the guiding channel). This merging reduces the number of separate components needed, thereby limiting the increase in device complexity while achieving reliable vibration transmission.
Solution Approach 2:
The pressing component serves multiple purposes: it provides elastic support, transmits vibrations through friction, positions the vibration unit, and absorbs shock. By designing this single component to perform multiple functions, the patent avoids the need for separate elements for each function, thus improving reliability without proportionally increasing device complexity.
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 provides a stable and secure connection between the vibration unit and the toothbrush head, enhancing vibration transmission and preventing disengagement, resulting in improved brushing efficiency and durability.
Implementation Method 1
The convex section and the bending section are pressed by the vibration unit to elastically deform towards the inner side wall of the insertion cavity respectively; when the elastic arm and the friction arm deform away from each other, the elastic structure is elastically deformed and thus elongated
Implementation Method 2
an inner side of the convex section has a friction surface facing the pressing channel, the friction surface is provided with a concave-convex structure, the pressing surface of the bending section and the concave-convex structure of the convex section press opposite sides of the vibration unit respectively to fix the vibration unit in the pressing channel
Data Source
AI summary
An electric toothbrush head includes a brush body. The brush body includes an insertion cavity and a plug-in unit inserted into the insertion cavity. The plug-in unit includes a friction arm and an elastic arm cooperatively forming a pressing channel therebetween. The elastic arm has a bending section with a pressing surface facing the pressing channel. The friction arm has a convex section with a friction surface facing the pressing channel. The pressing surface and a concave-convex structure of the convex section press opposite sides of a vibration unit to fix the vibration unit in the pressing channel. The convex section has a concave surface facing an inner side wall of the insertion cavity, with a curved interval formed between the concave surface and the inner side wall. An elastic rubber block is filled in the curved interval and the elastic rubber block abuts against the inner side wall.