Razor Handle Pivoting Head with Dual Torque Biasing

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Solution Overview

Problem

Current razors with pivoting axes for wet or dry shaving face challenges in providing a skin benefit while maintaining effective blade pivoting in a compact, durable design, affecting the closeness and comfort of the shave.

Innovation Solution

A razor handle design featuring a pivoting head coupled with a main body through a benefit delivery member and a spring member, providing a biased torque mechanism that allows angular deflection, ensuring a closer and more comfortable shave by delivering fluid or heat benefits.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a pivoting axis is provided for blade pivoting motion, then the closeness of shave is improved, but the ability to deliver skin benefit (fluid or heat) is hindered

Engineering Contradiction:

Improvecloseness of shaveVSAvoidskin benefit delivery

Core Design Contradiction:

Manufacturing precisionVSAdaptability or versatility

Solution Approach 1:

The razor handle employs a dynamic pivoting mechanism that allows the head to rotate about a pivot axis during shaving strokes, enabling the blades to maintain optimal contact with the shaving surface for closeness while the flexible benefit delivery member dynamically adjusts to accommodate the pivoting motion for effective fluid or heat delivery

Inventive Principle:

Principle #15Dynamics

2Reliability

If a compact and durable razor design is used, then reliability is improved, but effective skin benefit delivery is hindered

Engineering Contradiction:

Improvecompact and durable designVSAvoidskin benefit delivery

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The benefit delivery member is constructed as a flexible tube or conduit that can bend and flex to accommodate the pivoting head motion while maintaining structural integrity, allowing compact and durable razor design to coexist with effective skin benefit delivery through the flexible member's ability to deform without failure

Inventive Principle:

Principle #30Flexible shells and thin films

3Adaptability or versatility

If the benefit delivery member is made flexible to accommodate pivoting, then skin benefit delivery is improved, but the structure becomes more complex

Engineering Contradiction:

Improveskin benefit deliveryVSAvoidstructure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The benefit delivery member utilizes a flexible tube construction that inherently accommodates pivoting motion through material flexibility rather than complex mechanical joints or articulations, simplifying the overall structure while maintaining the ability to deliver skin benefits during dynamic shaving strokes

Inventive Principle:

Principle #30Flexible shells and thin films

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

The design enhances shaving performance by providing a closer shave with improved comfort and precision, while being simpler, cost-effective, and easier to manufacture and assemble.

Implementation Method 1

A spring member can extend from a spring main-body connection on the main body to a spring-pivoting-head connection on the pivoting head, the spring member applying a second biasing torque to affect an angular deflection about the first axis of rotation of the pivoting head relative to the main body

Methodology Applied

Scientific EffectSpring: Spring

Implementation Method 2

A severable benefit delivery member can extend from a main body connection on the main body to a pivoting head connection on the pivoting head, the benefit delivery member providing a first biasing torque on the pivoting head to affect an angular deflection about the first axis of rotation of the pivoting head relative to the main body

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS11780105B2Razor handle with a pivoting portion

Publication Date: 2023.10.10 THE GILLETTE CO

AI summary

A razor handle. The razor handle can have a main body and a pivoting head pivotally coupled with the main body about a first axis of rotation. A severable benefit delivery member can extend from a main body connection on the main body to a pivoting head connection on the pivoting head, the benefit delivery member providing a first biasing torque on the pivoting head to affect an angular deflection about the first axis of rotation of the pivoting head relative to the main body. A spring member can extend from a spring-main-body connection on the main body to a spring-pivoting-head connection on the pivoting head, the spring member applying a second biasing torque to affect an angular deflection about the first axis of rotation of the pivoting head relative to the main body. A ratio of the sum of the first and second pivoting torques divided by the angular deflection in radians to the second pivoting torque divided by the angular deflection in radians of the pivoting head with the pivot benefit delivery connection severed can be greater than 2:1.