Razor Handle Grip and Coupling via Composite Cover Layer

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Solution Overview

Problem

Conventional razor handles often lack sufficient grip and durability, particularly when mishandled, due to their rigid construction and lack of ergonomic design.

Innovation Solution

A handle for a razor cartridge comprising a body formed of a first material with a centerline, a cover layer of a second material with projections for enhanced grip, and a coupling mechanism using shells and protrusions to reinforce attachment and prevent separation, along with a rod for balance and flexibility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the handle uses a rigid construction, then the structural strength is improved, but the grip comfort and durability deteriorate

Engineering Contradiction:

Improvestructural strengthVSAvoidgrip comfort

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The handle incorporates a cover layer with varying projection heights at different locations to provide enhanced grip comfort in specific areas, while the main body maintains rigid construction for structural strength. The projections create localized ergonomic features without compromising overall structural integrity.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The handle combines a rigid body material with a cover layer material that has different properties, creating a composite structure. The body provides structural strength while the cover layer with its projection pattern provides enhanced grip comfort and durability.

Inventive Principle:

Principle #40Composite materials

2Stability of the object's composition

If the handle uses a rigid construction, then the structural stability is improved, but the durability when mishandled deteriorates

Engineering Contradiction:

Improvestructural stabilityVSAvoiddurability when mishandled

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The handle design changes the physical parameters of the surface by adding projections with varying heights to the cover layer. This modifies the surface topology to provide better grip and distribute stress more evenly during mishandling, improving durability while maintaining structural stability.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The cover layer with its projection pattern acts as a cushioning element that absorbs and distributes impact forces before they reach the rigid body. This preemptive protection mechanism enhances durability when the handle is mishandled while preserving structural stability.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Ease of manufacture

If the handle uses a simple construction, then the manufacturing ease is improved, but the grip and ergonomic design deteriorate

Engineering Contradiction:

Improvemanufacturing easeVSAvoidergonomic design

Core Design Contradiction:

Ease of manufactureVSEase of operation

Solution Approach 1:

The handle is divided into distinct segments: a body portion and a cover layer with projections. This segmentation allows each component to be manufactured separately using optimized processes, then assembled together. The projections are formed as integral features of the cover layer, simplifying manufacturing while achieving ergonomic design goals.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP3496913B1Handle for a razor

Publication Date: 2020.09.23 THE GILLETTE CO

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AI summary

A handle (20) for a razor cartridge (27) is provided.