Razor Cartridge Chain-Like Blade Support for Rinsability

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Solution Overview

Problem

Razor cartridges with movable blades face challenges in rinsability and ability to follow skin contours due to supportive structures that either prevent water from removing debris or reduce blade movement, and existing designs often harm performance by guiding all blades uniformly.

Innovation Solution

A razor cartridge design with a housing that directly attaches cutting elements using connecting structures at each end, allowing them to form a chain-like support system, which enhances rinsability and enables closer adherence to skin contours without additional supports, thus improving shaving performance and reducing clogging.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If elastic members and slots are used to support movable blades, then the blades can move to follow skin contours, but water cannot rinse away accumulated debris

Engineering Contradiction:

Improveblade movement to follow skin contoursVSAvoiddebris accumulation preventing rinsability

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The support structure is divided into multiple independent elastic members (first elastic member and second elastic member) that can move relative to each other, allowing water to flow through the gaps between segments and rinse debris away while maintaining blade contour-following capability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The support structure uses flexible elastic members that can deform to follow skin contours while maintaining open spaces between the elastic members that allow water flow for rinsability, combining flexibility with debris removal capability

Inventive Principle:

Principle #30Flexible shells and thin films

2Adaptability or versatility

If the cartridge is configured to be flexible to follow skin contour, then better skin contact is achieved, but the supportive structures reduce the ability of blades to follow closely the movement of the cartridge

Engineering Contradiction:

Improvecartridge flexibility to follow skin contourVSAvoidblade movement to follow skin contours

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The support structure is segmented into multiple independent elastic members rather than a single rigid frame, allowing each segment to move independently and transmit the cartridge's flexibility to the blades while maintaining sufficient support for close skin contour following

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The support structure transitions from a static rigid frame to a dynamic system of elastic members that can deform and move with the cartridge, enabling the blades to follow skin contours closely while maintaining structural support

Inventive Principle:

Principle #15Dynamics

3Stability of the object's composition

If a grid-like frame blade support is used, then all blades are guided to the same movement, but this harms the performance of the shaver

Engineering Contradiction:

Improveuniform blade movement guidanceVSAvoidshaving performance

Core Design Contradiction:

Stability of the object's compositionVSProductivity

Solution Approach 1:

The grid-like frame is divided into multiple independent elastic members that can move differently according to local skin conditions, allowing each blade to optimize its movement for shaving performance rather than being constrained by uniform grid guidance

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Each elastic member in the support structure has independent properties and movement characteristics tailored to its specific location, allowing different blades to follow different skin contours and optimize shaving performance locally rather than uniformly

Inventive Principle:

Principle #3Local quality

Data Source

PatentEP3638467B1Razor cartridges

Publication Date: 2024.02.28 BIC VIOLEX SINGLE MEMBER SA

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AI summary

Shaving cartridges (1) and method of producing thereof including a housing (2), a guard bar (3), a cap (4) and cutting elements (5), the housing including an inner receiving portion (210) and an inner attaching portion (211), the cutting elements further including a connecting structure (506) at each end (504), (505) for connection of the cutting elements either on the housing or between adjacent cutting elements to thereby form a chain-like effect.