Razor Cartridge Guard Member Dynamics

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Solution Overview

Problem

Conventional razor cartridges with fixed non-cutting members lack a three-dimensional shaving experience and often cause skin irritation during the shaving process.

Innovation Solution

A razor cartridge design featuring a blade housing with a guard member that includes a skin contact portion partially exposed, allowing it to move up and down relative to the blade housing, reducing skin irritation and enhancing the three-dimensional shaving experience by moving along the contour of the shaving area.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a fixed non-cutting member is provided in the razor cartridge, then skin irritation is reduced, but the three-dimensional shaving sense is insufficient

Engineering Contradiction:

Improveskin irritationVSAvoidthree-dimensional shaving sense

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The non-cutting member is designed with elastic properties and is resiliently supported, allowing it to dynamically move up and down relative to the blade housing. This dynamic capability enables the non-cutting member to adapt to the contours of the skin surface, providing both skin protection and three-dimensional shaving sense simultaneously.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The non-cutting member's position parameter is made variable through elastic support, allowing it to change its vertical position in response to skin contour variations. This parameter change enables the member to maintain optimal contact with the skin while reducing irritation and enhancing the three-dimensional shaving experience.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If a fixed non-cutting member is provided in the razor cartridge, then the structure is simple, but the shaving efficiency is limited

Engineering Contradiction:

Improvestructure simplicityVSAvoidshaving efficiency

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The non-cutting member transitions from a fixed static structure to a dynamic resiliently supported structure. This dynamic design maintains relative structural simplicity while dramatically improving shaving efficiency by enabling the member to adapt to skin contours, thereby reducing skin irritation and enhancing the three-dimensional shaving sense.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If the skin contact portion moves up and down along the contour of shaving area, then three-dimensional shaving is achieved, but the device complexity increases

Engineering Contradiction:

Improvethree-dimensional shaving senseVSAvoidstructure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The non-cutting member is constructed with elastic material properties that allow it to flex and move up and down along skin contours. This flexible design achieves three-dimensional adaptability without requiring complex mechanical linkages, motors, or control systems, thereby maintaining relative structural simplicity while enabling enhanced shaving performance.

Inventive Principle:

Principle #30Flexible shells and thin films

Data Source

PatentUS20230373116A1Razor cartridge

Publication Date: 2023.11.23 DORCO CO LTD

AI summary

Disclosed is a razor cartridge according to an embodiment of the disclosure, which includes a blade formed with a cutting edge; a blade housing longitudinally accommodating the blade, and including a top to which the cutting edge is at least partially exposed and a bottom opposite to the top; and a guard member including a skin contact portion at least partially exposed to the top, and longitudinally accommodated in the blade housing so that the skin contact portion can move up and down relative to the blade housing.