Razor Connector Elastic Deformation Impact Absorption

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Solution Overview

Problem

Conventional razors with strong engagement forces between the handle assembly and razor cartridge face difficulties in separating the components, leading to damage from external impacts and making replacement cumbersome.

Innovation Solution

A razor design featuring a connector with elastic materials and a separable structure between the holder mounting part and connector, allowing for smooth attachment and detachment of the handle assembly from the razor cartridge, with a connector that can deform independently to absorb external impacts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If the connector and holder mounting part are integrally formed on the cartridge main body to provide strong engagement force, then the engagement force between the razor cartridge and handle assembly is strong, but the connector is damaged by external impacts and it becomes difficult to separate the razor cartridge from the handle assembly

Engineering Contradiction:
Improveengagement forceVSAvoidconnector durability
Core Design Contradiction:
ForceVSReliability

Solution Approach 1:

The connector is separated from the cartridge main body, creating an independent component. This segmentation allows the connector to be replaced independently when damaged, preventing the need to discard the entire cartridge main body while maintaining strong engagement force through the integrated holder mounting part.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The holder mounting part is designed with elastic deformability, allowing it to dynamically adjust during attachment and detachment operations. This dynamic property enables smooth separation when needed while maintaining strong engagement during normal use, resolving the contradiction between strong engagement and easy separation.

Inventive Principle:
Principle #15Dynamics

2Force

If the connector and holder mounting part are integrally formed on the cartridge main body to provide strong engagement force, then the engagement force between the razor cartridge and handle assembly is strong, but it becomes difficult to separate the razor cartridge from the handle assembly

Engineering Contradiction:
Improveengagement forceVSAvoidseparation ease
Core Design Contradiction:
ForceVSEase of operation

Solution Approach 1:

By separating the connector from the holder mounting part, the design allows the holder mounting part to remain integrated with the cartridge main body for strong engagement, while the detachable connector enables easy separation through simple connector removal without requiring forceful detachment of the entire assembly.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The elastic deformability of the holder mounting part provides dynamic response during separation operations, allowing controlled deformation to facilitate easy detachment while maintaining strong engagement force during normal usage conditions.

Inventive Principle:
Principle #15Dynamics

3Reliability

If the connector is made separable to prevent damage from external impacts, then the connector can be replaced independently, but the engagement force between the razor cartridge and handle assembly is reduced

Engineering Contradiction:
Improveconnector durabilityVSAvoidengagement force
Core Design Contradiction:
ReliabilityVSForce

Solution Approach 1:

The holder mounting part merges the functions of both the connector and the mounting structure into a single integrated component. This merging ensures strong engagement force through the direct connection to the cartridge main body while allowing the entire assembly to be replaced independently if needed, maintaining reliability without sacrificing engagement strength.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The elastic properties of the holder mounting part provide dynamic engagement that maintains strong force during normal use while allowing controlled deformation to prevent damage from external impacts, thus maintaining both reliability and engagement force.

Inventive Principle:
Principle #15Dynamics

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

Enables easy handling and replacement of the razor cartridge while reducing the risk of connector damage from external impacts, improving shaving performance and user convenience.

Implementation Method 1

a holder mounting part which is integrally formed on the rear of the cartridge main body and is positioned between the first connecting part and the second connecting part; and a connector which is connected to the first connecting part and the second connecting part to cover at least a part of the holder connected to the holder mounting part

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentEP3378611B1razor
Publication Date: 2021.04.14 DORCO CO LTD
  • EP3378611B1 patent drawingFigure 1
  • EP3378611B1 patent drawingFigure 2
  • EP3378611B1 patent drawingFigure 3

AI summary

A razor includes a cartridge main body, a front of the cartridge main body and a rear of the cartridge main body are partially open; a connector mounting part which includes a first connecting part integrally formed on the rear of the cartridge main body and a second connecting part integrally formed on the rear of the cartridge main body and spaced apart from the first connecting part; a holder mounting part which is integrally formed on the rear of the cartridge main body and is positioned between the first connecting part and the second connecting part; a handle assembly which includes a handle body held by a user and a holder pivotally positioned on an upper side of the handle body and detachably connected to the holder mounting part; and a connector which is connected to the first connecting part and the second connecting part to cover at least a part of the holder connected to the holder mounting part.