Shaving Unit Bottom Opening for Hair Collection Chamber Cleaning

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Solution Overview

Problem

Existing shaving units require inconvenient cleaning procedures, as they need to be opened to access hair collection chambers, and additional components like impellers are necessary for effective cleaning, which increase manufacturing costs and limit design optimizations.

Innovation Solution

A shaving unit with at least two cutting units, each having a housing with a bottom wall opening for fluid communication, a sealing structure that prevents hair escape while allowing water to flush through, enabling efficient cleaning without the need for impellers, allowing for improved skin contour following and reduced manufacturing complexity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If impellers are integrated into the shaving unit to produce sufficient cleaning effect, then cleaning effectiveness is improved, but device complexity and manufacturing costs increase

Engineering Contradiction:
Improvecleaning effectivenessVSAvoiddevice complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent removes the impeller component from the shaving unit, extracting the problematic element that caused increased complexity and manufacturing costs. Instead of using mechanical impellers to generate water flow, the invention uses a simplified bottom-opening structure that allows water to enter and flush the hair collection chamber directly, achieving effective cleaning without the need for complex rotating components.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the mechanical impeller system with a passive hydraulic flushing system. Instead of using mechanically driven impellers to create water flow, the invention relies on water pressure and gravity to flush hairs through the bottom opening, substituting a complex mechanical system with a simpler hydraulic approach.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If impellers are integrated into the shaving unit to produce sufficient cleaning effect, then cleaning effectiveness is improved, but manufacturing costs increase

Engineering Contradiction:
Improvecleaning effectivenessVSAvoidmanufacturing costs
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The patent removes the impeller component from the shaving unit, extracting the problematic element that caused increased complexity and manufacturing costs. Instead of using mechanical impellers to generate water flow, the invention uses a simplified bottom-opening structure that allows water to enter and flush the hair collection chamber directly, achieving effective cleaning without the need for complex rotating components.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent employs a simpler, more cost-effective structure by eliminating expensive impeller components. The bottom-opening design uses basic structural elements that are cheaper to manufacture and assemble, aligning with the principle of using simpler, more economical components to achieve the desired function.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

3Adaptability or versatility

If the cutting unit structure is optimized for skin contour following, then adaptability is improved, but space for cleaning components is reduced

Engineering Contradiction:
Improveskin contour following abilityVSAvoidspace for cleaning components
Core Design Contradiction:
Adaptability or versatilityVSVolume of stationary object

Solution Approach 1:

The patent removes the impeller component from the shaving unit, extracting the problematic element that caused increased complexity and manufacturing costs. Instead of using mechanical impellers to generate water flow, the invention uses a simplified bottom-opening structure that allows water to enter and flush the hair collection chamber directly, achieving effective cleaning without the need for complex rotating components.

Inventive Principle:
Principle #2Taking out (Extraction)

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 solution allows for quick and complete removal of hair and debris, improving cleaning efficiency with hydraulic and gravity forces, reducing manufacturing costs, and enhancing design flexibility by eliminating the need for impellers.

Implementation Method 1

a sealing structure is provided between the opening and, respectively, the first hair collection chamber and the second hair collection chamber, which is configured and arranged to prevent cut hairs from escaping from, respectively, the first hair collection chamber and the second hair collection chamber via the opening

Methodology Applied
Scientific EffectPhysical Containment: Physical Containment

Implementation Method 2

allow water to flush via the opening to, respectively, the first hair collection chamber and the second hair collection chamber

Methodology Applied
Scientific EffectHydraulic Flow: Hydraulic Press

Implementation Method 3

removal of hair and debris, improving cleaning efficiency with hydraulic and gravity forces

Methodology Applied
Scientific EffectGravity: Gravitation

Data Source

PatentUS11154996B2Shaving unit having cutting units with a flush hole for cleaning a hair collection chamber
Publication Date: 2021.10.26 KONINKLIJKE PHILIPS NV
  • US11154996B2 patent drawing
  • US11154996B2 patent drawing
  • US11154996B2 patent drawing

AI summary

The invention relates to a shaving unit for a shaving apparatus The apparatus including at least a first cutting unit and a second cutting unit, where each of the first and second cutting units respectively include external cutting members having a plurality of hair entry openings and further respectively include internal cutting members which are rotatable relative the respective external cutting members about respective axes of rotation. The first and second internal cutting members being connected to a transmission unit via, respective first and second drive spindles. Each of the first and second cutting units including a housing having a bottom wall including an opening in fluid communication with a hair collection chamber in the housing. In each cutting unit opposed sealing surfaces are provided between the opening and the hair collection chamber, arranged to prevent cut hairs from escaping from the hair collection chamber via the opening and to allow water to flush via the opening to the hair collection chamber.