Hair Cutting Kit With Universal Comb Attachment Across Trimmer Heads

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Solution Overview

Problem

Existing hair cutting kits face challenges with manufacturing complexity and inefficiency due to the need for multiple comb implements tailored for specific trimmer heads, and the risk of incorrect use leading to compromised cutting efficiency.

Innovation Solution

A hair cutting kit design featuring a handle, two trimmer heads with different tooth pitches, and a comb implement that can be reversibly attached to both, with the comb teeth aligned to match the pitch of either trimmer head, ensuring efficient hair guidance and minimizing incorrect use.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple comb implements are provided tailored for specific trimmer heads, then cutting efficiency is optimized for each trimmer head, but manufacturing complexity and device complexity increase

Engineering Contradiction:
Improvecutting efficiencyVSAvoidmanufacturing complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The comb implement is designed with a universal tooth pitch that can be used with multiple trimmer heads having different tooth pitches. The comb teeth are configured to align with the gaps between blade teeth of various trimmer heads, allowing a single comb implement to function efficiently across different trimmer head types, thereby reducing the number of comb implements needed and simplifying manufacturing.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Productivity

If multiple comb implements tailored for specific trimmer heads are provided, then cutting efficiency is optimized, but the complexity of use increases and users may combine comb implements with incorrect trimmer heads

Engineering Contradiction:
Improvecutting efficiencyVSAvoidcomplexity of use
Core Design Contradiction:
ProductivityVSEase of operation

Solution Approach 1:

The comb implement is designed to be compatible with multiple trimmer head types through its universal tooth pitch configuration. This allows users to use the same comb implement with different trimmer heads without risk of incorrect pairing, as the comb teeth are specifically designed to align with the gaps between blade teeth of various trimmer heads, eliminating the confusion of matching specific combs to specific trimmer heads.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Device complexity

If a single comb implement is used with multiple trimmer heads, then manufacturing complexity is reduced, but cutting efficiency may be compromised

Engineering Contradiction:
Improvemanufacturing complexityVSAvoidcutting efficiency
Core Design Contradiction:
Device complexityVSProductivity

Solution Approach 1:

The comb implement features teeth with specific pitch and spacing dimensions that are optimized to align with the gaps between blade teeth of multiple trimmer head types. The local geometric properties of the comb teeth are carefully designed to match the varying tooth pitches of different trimmer heads, ensuring efficient hair guidance and cutting performance across all compatible trimmer heads while maintaining a single universal comb design.

Inventive Principle:
Principle #3Local quality

Data Source

PatentEP4112245B1Hair cutting kit
Publication Date: 2025.10.22 BRAUN GMBH
  • EP4112245B1 patent drawingFigure 1
  • EP4112245B1 patent drawingFigure 2
  • EP4112245B1 patent drawingFigure 3

AI summary

A hair cutting kit (10) comprises a handle (20), a first trimmer head (30) configured for reversibly releasable attachment to the handle (20), a second trimmer head (40) configured for reversibly releasable attachment to the handle (20), and a comb implement (50) comprising at least one row of comb teeth and a mechanical interface (59) operative for reversibly releasable attachment of the comb implement (50) to the first trimmer head (30) and for reversibly releasable attachment of the comb implement (50) to the second trimmer head (40).