Electric Shaver Roller Damper for Vibration Control
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Solution Overview
Problem
Electric shavers with rollers often generate abnormal sounds due to vibrations, which can be uncomfortable and affect shaving performance.
Innovation Solution
Incorporating an elastic body that supports the rotating body to rotate smoothly when in contact with the skin and prevents vibration when not in contact, reducing frictional force and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a clearance is provided between the roller and the roller support bracket to enable smooth rotation, then the roller can rotate smoothly and reduce frictional force, but the roller may vibrate and generate abnormal sound
Solution Approach 1:
The patent introduces a damper as an intermediary component between the roller and the roller support bracket. This damper absorbs vibrations while allowing the roller to rotate smoothly, thereby eliminating abnormal sounds without compromising rotation performance. The damper acts as a mediator that resolves the conflict between smooth rotation and vibration prevention.
Solution Approach 2:
The patent modifies the clearance parameter between the roller and the roller support bracket by introducing a controlled gap that accommodates the damper. This parameter change allows the system to maintain smooth rotation while the damper absorbs excess vibrations, converting the harmful vibration parameter into controlled damping action.
2Object-generated harmful factors
If the roller is firmly fixed to the roller support bracket to prevent vibration, then abnormal sound is reduced, but the roller cannot rotate smoothly and frictional force increases
Solution Approach 1:
The damper serves as an intermediary that connects the roller to the roller support bracket with controlled flexibility. It provides just enough support to prevent excessive vibrations and abnormal sounds, while simultaneously allowing sufficient rotation smoothness. The damper mediates between the competing requirements of firm fixation and smooth rotation.
Solution Approach 2:
The patent transitions from a static fixed connection to a dynamic connection using the damper. The damper provides adaptive support that allows rotation during operation while damping vibrations, making the connection dynamic rather than rigid. This dynamic approach resolves the contradiction between firm fixation and smooth rotation.
3Object-generated harmful factors
If a damper is introduced between the roller and the roller support bracket to restrain vibration, then abnormal sound is reduced, but the structure becomes more complex
Solution Approach 1:
The damper can be implemented as a flexible element or thin film structure that provides vibration damping without adding significant structural complexity. This flexible approach allows the damper to be integrated into the existing roller-support bracket assembly with minimal additional components, resolving the contradiction between vibration control and structural simplicity.
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 effectively reduces abnormal sounds and vibrations, enhancing the comfort and effectiveness of hair shaving by minimizing frictional force between the blade and skin.
Implementation Method 1
an elastic body which enables the rotating body to rotate in a state where the rotating body is in contact with a skin, and which restrains the rotating body from vibrating in a state where the rotating body is not in contact with the skin
Implementation Method 2
the roller rotates while coming into contact with the skin, thereby reducing a frictional force generated between the outer blade and the skin
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3
AI summary
An electric shaver 10 includes a main body 100, an outer blade 35 that is held by the main body in a state where a surface of the outer blade is exposed, an inner blade34 that is disposed inside the outer blade so as to be movable relative to the outer blade, and a rotator210 that has a rotating body 220 disposed in the main body so as to extend in a moving direction of the inner blade, and a supporter 230 disposed in the main body so as to rotatably support the rotating body. The rotator has an elastic body 270 which enables the rotating body to rotate in a state where the rotating body is in contact with a skin, and which restrains the rotating body from vibrating in a state where the rotating body is not in contact with the skin.