Razor Handle Rigid Member for Multi-Axis Motion

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Solution Overview

Problem

Current razor handle designs with movable portions are complex, costly, and prone to durability issues due to tight tolerances and additional components, which compromise manufacturing simplicity and consumer benefits.

Innovation Solution

A razor handle design featuring a first member with movable elements, a second member, and a rigid member extending between them, allowing for easy attachment and detachment of the cartridge and providing multiple axes of motion, while simplifying manufacturing processes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If additional components with prescribed motion are added to improve handle ergonomics and cartridge attachment mechanisms, then consumer benefits are improved, but device complexity and manufacturing cost increase

Engineering Contradiction:

Improvehandle ergonomics and cartridge attachmentVSAvoidnumber of additional components

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent combines the handle body and cartridge assembly into a single integrated unit, eliminating the need for separate attachment mechanisms. The handle body directly engages with the cartridge through integrated features, reducing the number of components while maintaining ease of operation and attachment.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If tight tolerances are specified for additional components to ensure proper function, then reliability is improved, but manufacturing precision requirements and cost increase

Engineering Contradiction:

Improvefunctionality of movable portionsVSAvoidtolerance requirements

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent segments the razor into distinct functional modules (handle body, cartridge, blade assembly) that can be manufactured separately with relaxed tolerances and then assembled. This modular approach allows each component to be optimized independently, reducing overall manufacturing precision requirements while maintaining reliability through proper interface design.

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If multiple axes of rotation of the cartridge relative to the handle are implemented, then shave performance is improved, but device complexity increases

Engineering Contradiction:

Improvecartridge motion capabilityVSAvoidmechanism for multi-axis motion

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements dynamic motion capabilities where the cartridge can rotate and articulate relative to the handle body through flexible connections. This allows the cartridge to adapt to different shaving angles and contours without requiring complex mechanical mechanisms, achieving multi-axis motion through controlled flexibility rather than rigid mechanical joints.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20250121520A1Razor handle with a rigid member

Publication Date: 2025.04.17 THE GILLETTE CO

AI summary

A handle for a shaving razor in which the handle comprises a frame and a movable member assembly operably coupled to the frame such that the frame is disposed between the movable member assembly and where the movable member assembly portions are configured to move both above and below the frame. The movement can be linear or rotational. The movable member assembly comprises one or more springs. The first member and the second member are coupled together through said rigid member. The rigid member can include a rigid member platform which has a width to thickness ratio from about 7 to about 60.