Electric Mascara Rubber Brush Disk Tooth Design
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Solution Overview
Problem
Existing electric mascaras often cause eyelash tangling, straining, and extraction due to brush design, and generate excessive vibration noise, while their complex rotary switches increase production costs.
Innovation Solution
An electric mascara with a rubber brush featuring a disk-type tooth formed by consecutive threads and grooves on the wand, a motor decelerator covered in silicon, and a simplified rotary switch to reduce noise and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a brush with bristles is used to comb up eyelash, then the brush can be made with plastic bristles twisted with a wire core, but eyelash cannot be combed uniformly or is strained to a side
Solution Approach 1:
The patent replaces the traditional mechanical brush with bristles twisted around a wire core with a rubber brush featuring a disk-type tooth structure. This substitution eliminates the spiral twisting mechanism that causes uneven combing, allowing the rubber brush to rotate smoothly and comb eyelashes uniformly without straining them to the side.
Solution Approach 2:
The patent employs rubber material for the brush body, combining it with a disk-type tooth structure formed by consecutive threads and grooves. This composite design provides both the flexibility needed for smooth rotation and the geometric precision required for uniform eyelash combing, resolving the contradiction between ease of manufacture and combing uniformity.
2Adaptability or versatility
If a rotary switch with complex structure is used to switch rotational direction, then functionality is improved, but production cost increases
Solution Approach 1:
The patent extracts the essential function of the rotary switch (controlling motor rotation direction) and implements it through a simplified structure. By removing unnecessary complex components while retaining the core rotational switching capability, the design achieves the required functionality at lower production cost.
Solution Approach 2:
The simplified rotary switch structure performs multiple functions: it controls motor power supply, determines rotational direction, and provides user interface interaction. This multi-functionality reduces the need for separate components, thereby reducing overall device complexity and production cost while maintaining adaptability.
3Ease of operation
If motor is used to rotate the brush automatically, then ease of operation is improved, but vibration noise is generated
Solution Approach 1:
The patent uses a rubber brush material that acts as a flexible element to absorb and dampen vibrations generated by the motor. The rubber material's inherent viscoelastic properties convert mechanical vibration energy into thermal energy through internal friction, significantly reducing the vibration noise while maintaining the automatic rotation function.
Solution Approach 2:
The patent converts the harmful vibration noise generated by the motor into beneficial heat energy through the rubber material's damping properties. The same rubber that provides the brush's flexibility and comfort also serves as a vibration isolator, transforming the harmful mechanical vibrations into harmless thermal energy.
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 electric mascara effectively combs eyelashes without straining, reduces noise, and minimizes cost by using a rubber brush with a disk-type tooth and covering the motor with silicon, while simplifying the rotary switch structure.
Implementation Method 1
a rubber brush 80 where tooth 81 are formed by consecutive thread 82 and groove 83
Implementation Method 2
covering the motor and the decelerator with a silicon cover
Data Source
AI summary
Provided is an electric mascara capable of not only preventing eyelash from being pulled out when it is made up by improving a brush but also enabling to comb up eyelash in order without deformation. An electric mascara includes a rubber brush where tooth are formed by consecutive thread and groove, and being installed to the end portion of a wand; a decelerator-attached motor; and a power switch to provide power with the motor.