Interchangeable Collet Shaving Brush Handle

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Solution Overview

Problem

Conventional shaving brushes require multiple handles for different brush knot diameters, leading to inconvenience and inefficiency due to the permanent attachment of knots to handles, which does not accommodate personal preferences or varying applications.

Innovation Solution

A shaving brush design featuring a handle with interchangeable collets of different diameters, allowing a single handle to accommodate various brush knots by using a collet system with a collar to securely hold the knot in place, enabling easy switching between different knot diameters.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple different brushes are used to accommodate different brush knot diameters, then the adaptability is improved, but the device complexity increases

Engineering Contradiction:

Improveadaptability to different brush knot diametersVSAvoidnumber of brushes needed

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The handle is designed with a universal collet mechanism that can accommodate multiple brush knot diameters. The collet system with adjustable collars allows a single handle to securely hold different sized brush knots, making one brush handle perform multiple functions that previously required several different brushes.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The brush is divided into separable components: the handle, collet, collar, and brush knot. The collet and collar can be removed and replaced to change the brush knot diameter, allowing users to segment the brush into interchangeable parts rather than using entirely different brushes for different diameters.

Inventive Principle:

Principle #1Segmentation

2Reliability

If brush knots are permanently attached to handles using glue, then the reliability is improved, but the adaptability worsens

Engineering Contradiction:

Improveattachment securityVSAvoidability to change brush knot diameters

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The attachment mechanism transitions from static permanent glue attachment to a dynamic removable mechanical connection. The collet and collar system allows the brush knot to be securely attached during use but easily removed and replaced when needed, providing both reliability during operation and adaptability for changes.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The collet acts as an intermediary component between the handle and the brush knot. Instead of directly gluing the knot to the handle, the collet provides a secure mechanical attachment point that can be adjusted and replaced, mediating between the need for secure attachment and the need for interchangeability.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20240365962A1Shaving brush

Publication Date: 2024.11.07 TRIAXIS MACHINE & TOOL LLC

AI summary

A shaving brush is disclosed that can accommodate brush knots having different diameters. The brush comprises a handle, a collet, and a collar, among other components. The collet includes an upper end which includes a bore with an inner diameter for accommodating a brush knot of a given diameter. The collet also includes a lower end which fits into the handle. The collar fits over the collet and engages the handle, to trap the collet in place. Different collets have bores with different inner diameters, but the collets all have the same outer diameter. Brush knots with different diameters are thus used with a given collet, and all collets can be used with the same brush handle.