Multi-Blade Rotary Razor with Overlapping Segmented Blades
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Solution Overview
Problem
Conventional razors either suffer from inferior hair-cutting performance due to safety features that prevent direct blade contact with the skin, or risk skin scarring with wet razors that do not have these safety mechanisms.
Innovation Solution
A multi-blade electric rotary razor with a motor-driven blade cartridge featuring overlapping razor blades arranged at equal angles, allowing for effective hair cutting without direct skin contact and minimizing dermal stimulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a safety-net is installed to prevent direct blade contact with skin, then safety is improved, but hair-cutting performance deteriorates
Solution Approach 1:
The blade assembly is segmented into multiple independent blades (first blade, second blade, third blade, fourth blade) arranged in a circular pattern. Each blade operates independently to cut hair, providing multiple cutting edges that work together to achieve superior hair-cutting performance while maintaining safety through the distributed blade configuration
Solution Approach 2:
The blades are arranged in a circular dimension around the rotation axis, creating a multi-dimensional cutting structure. This circular arrangement allows blades to approach hair from multiple angles and heights, enhancing cutting effectiveness while maintaining a safe distance from the skin through the rotational mechanism
2Reliability
If a safety-net is installed to prevent direct blade contact with skin, then safety is improved, but the blade does not tightly contact user's skin, resulting in inferior hair-cutting performance
Solution Approach 1:
The blade assembly is designed to rotate dynamically around the rotation axis, allowing the blades to move in a circular motion. This dynamic rotation enables the blades to tightly follow the contours of the skin and hair, maintaining close contact for effective cutting while the rotational motion ensures safety by preventing direct static contact
Solution Approach 2:
The continuous rotation of the blade assembly ensures that multiple blades are continuously engaged in cutting hair as they pass through the cutting zone. This continuous action maintains constant contact with the skin surface, providing uninterrupted hair-cutting performance while the rotational motion distributes the contact pressure for safety
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 multi-blade design provides superior hair-cutting performance comparable to wet razors while ensuring safety and reducing the risk of skin scarring, allowing for convenient use in both dry and wet shaving conditions.
Implementation Method 1
a razor blade cartridge (102) turned by a motor (103)
Data Source
AI summary
The present invention relates to a multi-blade electric rotary razor which comprises a razor blade cartridge turned by a motor, and at least one pair of razor blade assemblies disposed at an equal-angle distance at the razor blade cartridge along a direction in which the razor blade cartridge rotates, at least one pair of razor blades (hereinafter referred to as first razor blades) being arranged in an overlapping manner at a predetermined distance at the razor blade assembly along a radius direction of the razor blade cartridge. The electric rotary razor of the present invention has a structure of a wet shaver where multiple razor blades are arranged, and uses the motor to turn the razor blade cartridge during shaving for user convenience and thorough shaving. The multi-blade razor blade assembly alleviates a dermal stimulation, minimizes a possibility of a scar, and does not require shaving cream, making shaving convenient and unhindered by time and space.