Shaving Aid Applicator Head With Jetting Holes for Hygienic Use

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Solution Overview

Problem

Conventional shaving aid containers require users to spray the aid onto their hands or brushes, leading to potential contamination and increased complexity in application, which can cause sanitary issues and inconvenience.

Innovation Solution

A shaving aid application apparatus with a containing portion, a head, and jetting holes that allows direct application of the aid onto the skin, eliminating the need for hand or brush contact and simplifying the application process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If shaving aid is sprayed onto hand or brush first, then it can be applied to skin, but this increases the risk of contamination and creates sanitary issues

Engineering Contradiction:
Improveapplication processVSAvoidcontamination risk
Core Design Contradiction:
Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the application function from the conventional hand/brush intermediary method and integrates it directly into the dispensing device. The device includes a application head with jetting holes that directly contact the skin, eliminating the need for hands or brushes to touch the shaving aid, thus removing the contamination pathway while maintaining ease of application

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces a clean intermediary structure - the application head with jetting holes - that transfers the shaving aid directly to the skin without requiring hand or brush contact. This intermediary component remains clean and hygienic while facilitating the application process

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If shaving aid is sprayed onto hand or brush first, then applied to skin, then the application steps become more complex and time-consuming

Engineering Contradiction:
Improvesanitary safetyVSAvoidapplication time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The patent merges the dispensing function and the application function into a single integrated device. The containing portion holds the shaving aid while the application head with jetting holes directly applies it to the skin, combining what were previously separate steps (dispensing to hand/brush, then applying to skin) into one simultaneous action, thereby reducing both time and procedural complexity while maintaining sanitary safety

Inventive Principle:
Principle #5Merging (Combining)

3Object-affected harmful factors

If conventional container is used, then shaving aid can be dispensed, but it requires additional steps of spraying to hand/brush and then applying to skin

Engineering Contradiction:
Improvesanitary safetyVSAvoidapplication process complexity
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent creates a multi-functional device where the containing portion serves both as the storage container and the dispensing mechanism, while the application head with jetting holes provides direct application capability. This universal design eliminates the need for separate hand/brush intermediaries, reducing both sanitary risks and process complexity while maintaining effective shaving aid application

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

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

Provides a cleaner and easier application of shaving aid by expelling it directly onto the skin, reducing the risk of contamination and simplifying the application steps.

Implementation Method 1

The shaving aid is expelled from the containing portion to pass through the spraying gap and provided through the multiple jetting holes

Methodology Applied
Scientific EffectPressure differential: Pressure Gradient

Data Source

PatentEP3689780B1Shaving aid application apparatus
Publication Date: 2026.01.14 DORCO CO LTD
  • EP3689780B1 patent drawingFigure 1
  • EP3689780B1 patent drawingFigure 2
  • EP3689780B1 patent drawingFigure 3

AI summary

A shaving aid application apparatus is disclosed. According to at least one embodiment of the present disclosure, the apparatus includes a containing portion configured to hold a shaving aid; a head coupled to one side of the containing portion, an aid applying surface formed at one surface of the head; and multiple jetting holes located at the aid applying surface. A spraying gap is defined between at least a portion of the containing portion and at least a portion of the head, and the shaving aid is expelled from the containing portion to pass through the spraying gap and provided through the multiple jetting holes.