Unitarily Molded Razor Bridge for Precision Blade Positioning

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Solution Overview

Problem

The complexity and cost of manufacturing shaving devices are hindered by the need for precise blade positioning and shaving comfort, which existing technologies struggle to achieve efficiently.

Innovation Solution

A shaving head design featuring a unitarily molded bridge with flexible cross pieces and blade assemblies, where the blade assemblies are secured using deformable pins and sacrificial electrodes without heat processing, allowing for precise blade positioning and improved shaving comfort through textured skin contact surfaces and flexible design for navigating tight spaces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If numerous blades and small parts are used to improve shaving precision and comfort, then manufacturing complexity and cost increase

Engineering Contradiction:

Improveblade positioning precisionVSAvoidnumber of parts

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The bridge structure integrates multiple functions into a single component: it provides structural support, positions multiple blades precisely through molded-in features, and incorporates skin contact surfaces. This merging reduces the total number of parts while maintaining high manufacturing precision for blade positioning.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The bridge serves multiple purposes simultaneously: structural support, blade positioning, skin contact, and alignment of blade assemblies. This multi-functionality eliminates the need for separate components for each function, reducing device complexity while preserving precision.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Manufacturing precision

If numerous blades and small parts are used to improve shaving precision and comfort, then manufacturing cost increases

Engineering Contradiction:

Improveblade positioning precisionVSAvoidmanufacturing cost

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

Combining multiple functions into the bridge structure reduces the total part count, which directly lowers manufacturing costs associated with producing, inventorying, and assembling numerous small components while maintaining precise blade positioning through integrated features.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The bridge is unitarily molded as a single piece, eliminating the need for assembly of multiple bridge components. This segmentation principle applied in reverse (integrating rather than dividing) reduces assembly steps and manufacturing cost while preserving precision through molded-in positioning features.

Inventive Principle:

Principle #1Segmentation

3Manufacturing precision

If traditional assembly methods are used to ensure precise blade positioning, then manufacturing complexity increases

Engineering Contradiction:

Improveblade positioning precisionVSAvoidassembly process complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The bridge is pre-formed with integrated blade positioning features during the molding process. This preliminary action of creating positioning structures in advance eliminates the need for complex post-assembly adjustments or additional positioning components, reducing assembly complexity while maintaining precision.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The blade positioning function is merged into the bridge structure itself through molded-in features. This integration eliminates separate positioning mechanisms and simplifies the assembly process while ensuring precise blade positioning through the unified structure.

Inventive Principle:

Principle #5Merging (Combining)

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

This design reduces manufacturing complexity and cost while ensuring precise blade positioning and enhanced shaving comfort, with the flexible cross pieces and textured surfaces improving the shaving experience and allowing effective use in tight areas.

Implementation Method 1

blade assemblies secured using deformable pins and sacrificial electrodes without heat processing

Methodology Applied

Scientific EffectMechanical deformation: Deformation

Implementation Method 2

flexible cross pieces and textured surfaces improving the shaving experience and allowing effective use in tight areas

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS11541560B2Precision razor with low cost assembly

Publication Date: 2023.01.03 ROLLING RAZOR INC

AI summary

A precision shaving razor with low cost assembly. A bridge is unitarily molded having a leading platform, a handle attachment mechanism and first and a second cross member each molded to extend substantially perpendicularly to the leading platform. A plurality of base members is each unitarily molded to have a first peg and a second peg for attachment to the cross pieces. A plurality of blade covers each unitarily molded. A razor blade is sandwiched between each blade cover-base pair. In some instances, the blade covers are molded to have hard stops to facilitate precise blade position. In some cases, the bases define angular wash through channels and blade guards spaced to facilitate wash through. In some cases, the skin contacting surfaces of the razor are textured during molding to have a glide improving texture.