Dual-Material Paintbrush Handle Resolving Hand Fatigue

Solution Overview

Problem

Conventional paintbrush handles made of stiff materials like wood cause hand fatigue and bruising due to concentrated pressure on bony areas, as they fail to distribute the load comfortably.

Innovation Solution

A dual-material paintbrush handle design featuring a soft, flexible upper section for hand contact and a stiffer lower transition section for structural integrity, connected mechanically through projections and locking tips, ensuring comfort and stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a stiff material like wood is used for the paintbrush handle, then structural integrity is improved, but hand comfort deteriorates due to concentrated pressure on bony areas

Engineering Contradiction:

Improvestructural integrityVSAvoidhand fatigue and bruising

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The handle is divided into two distinct sections with different material properties: the upper section is made of soft, flexible material for hand comfort, while the lower section is made of stiff material for structural integrity. This local differentiation allows each part to perform its specific function optimally without compromising the other.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The handle combines two different materials with complementary properties - a soft flexible material (such as silicone or rubber) and a stiff material (such as wood or plastic). This composite construction allows the handle to simultaneously provide comfort through the soft upper section and structural strength through the stiff lower section.

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If a soft material is used for the paintbrush handle, then hand comfort is improved, but structural integrity deteriorates

Engineering Contradiction:

Improvehand comfortVSAvoidstructural integrity

Core Design Contradiction:

Object-affected harmful factorsVSStrength

Solution Approach 1:

The handle is divided into two distinct sections with different material properties: the upper section is made of soft, flexible material for hand comfort, while the lower section is made of stiff material for structural integrity. This local differentiation allows each part to perform its specific function optimally without compromising the other.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The handle combines two different materials with complementary properties - a soft flexible material (such as silicone or rubber) and a stiff material (such as wood or plastic). This composite construction allows the handle to simultaneously provide comfort through the soft upper section and structural strength through the stiff lower section.

Inventive Principle:

Principle #40Composite materials

3Object-affected harmful factors

If a dual-material handle is used, then both comfort and structural integrity are improved, but device complexity increases

Engineering Contradiction:

Improvehand comfortVSAvoidhandle structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The two separate sections (soft upper section and stiff lower section) are joined together to form a single integrated handle. The joining methods include adhesive bonding, mechanical interlocking, or molding techniques that create a unified structure while maintaining the distinct properties of each material section.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The handle combines two different materials with complementary properties - a soft flexible material (such as silicone or rubber) and a stiff material (such as wood or plastic). This composite construction allows the handle to simultaneously provide comfort through the soft upper section and structural strength through the stiff lower section.

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS9403269B1Dual-material paintbrush handle with internal fixation

Publication Date: 2016.08.02 BEHR PROCESS CORP

AI summary

The Dual-material Paintbrush Handle with Internal Fixation is comprised of two primary components. The first component is the flexible upper section that contacts the user's hand. The second component is the lower transition section, which acts to transition from the softer and more flexible first component to the ferrule, which is generally rigid. The lower transition section includes connection locations for the ferrule, and penetrations through which the soft upper section penetrates, stabilizing the connection between the upper and lower sections.