Rotary Shaving Apparatus with Roller-Mediated Skin Isolation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing shaving methods, such as razor blades and electric razors, often cause skin irritation, nicks, and ingrown hairs due to the need for forceful application and direct contact with the skin, which can lead to inefficiencies in hair removal and discomfort.

Innovation Solution

A shaving apparatus with a rotary cutter element and fixed blade, supported by rollers that maintain a controlled distance from the skin, allowing for efficient hair cutting without direct contact, utilizing a shearing technique to minimize skin irritation and ingrown hairs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a razor blade is driven forcefully across the skin to cut hair, then hair cutting efficiency is improved, but the risk of nicks and cuts increases

Engineering Contradiction:

Improvehair cutting efficiencyVSAvoidrisk of nicks and cuts

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces a screen with fenestrations as an intermediary element between the cutting blade and the skin. The screen allows hair to pass through to the blade while preventing direct contact between the blade and skin, thereby maintaining cutting efficiency while eliminating the harmful effect of nicks and cuts

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The cutting system is segmented into multiple components: the screen with multiple fenestrations, the blade, and the housing. This segmentation allows the screen to perform the function of hair delivery while the blade performs cutting, separating the functions to improve safety while maintaining efficiency

Inventive Principle:

Principle #1Segmentation

2Productivity

If a user presses the device hard against the skin to force hair through a static screen, then hair cutting is achieved, but skin irritation and ingrown hairs occur

Engineering Contradiction:

Improvehair removal effectivenessVSAvoidskin irritation and ingrown hairs

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent employs a rotary screen that rotates during operation, transforming the static screen approach into a dynamic system. This rotation reduces the need for hard pressing, allows continuous hair delivery to the blade, and prevents hair from being pressed back into the skin, thereby eliminating skin irritation and ingrown hairs while maintaining effective hair removal

Inventive Principle:

Principle #15Dynamics

3Force

If scissors are used to cut hair at the crossing point of two blades, then minimal force is required for cutting, but the cutting point cannot be close to the skin

Engineering Contradiction:

Improveforce required for cuttingVSAvoiddistance from cutting point to skin

Core Design Contradiction:

ForceVSLength of moving object

Solution Approach 1:

The screen acts as an intermediary that delivers hair to the blade at a precise location. The fenestrations in the screen position hair strands directly against the blade, enabling close cutting to the skin while requiring minimal force, similar to scissors but adapted for proximity to skin

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11376754B2Rotary shaving apparatus without direct forceable contact between the blades and the skin

Publication Date: 2022.07.05 HYBRID RAZOR

AI summary

There is provided a shaving apparatus having a head shaving portion that includes a rotary cutter and one or more roller elements configured to provide close skin contact with a fixed cutting blade, as well as to methods of using the same for efficient cutting of hair bristles off a skin region.