Kitchen Knife Spine Reinforcement for Bending Resistance

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Solution Overview

Problem

Conventional kitchen knives with thin blades tend to bend easily, reducing their usability and making it difficult to cut food materials effectively.

Innovation Solution

A kitchen knife design featuring a blade with a reinforcing part made of a metallic member, extending along the spine to enhance the blade's thickness direction strength, thereby preventing bending.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Weight of moving object

If the blade is thinned to reduce weight, then the weight of the kitchen knife is reduced, but the blade becomes prone to bending

Engineering Contradiction:

Improveweight of kitchen knifeVSAvoidresistance to bending

Core Design Contradiction:

Weight of moving objectVSStrength

Solution Approach 1:

The blade is segmented into two functional parts: a thin cutting portion for lightness and a thickened spine portion for strength. The spine part is selectively thickened while the cutting edge remains thin, achieving both weight reduction and bending resistance through spatial segmentation of structural properties.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The blade exhibits local quality variation where the spine part has different thickness properties compared to the cutting portion. The spine is thickened to provide structural support and resistance to bending, while the cutting edge maintains thinness for reduced weight and improved cutting performance.

Inventive Principle:

Principle #3Local quality

2Weight of moving object

If the blade is thinned to reduce weight, then the weight of the kitchen knife is reduced, but usability is reduced due to bending

Engineering Contradiction:

Improveweight of kitchen knifeVSAvoidusability in cutting

Core Design Contradiction:

Weight of moving objectVSEase of operation

Solution Approach 1:

The blade structure is segmented to separate the functions of cutting (thin edge) and structural support (thick spine). This segmentation allows the thin cutting portion to maintain ease of operation for cutting tasks while the thickened spine prevents bending that would compromise usability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

By applying local quality variation with a thickened spine and thin cutting edge, the blade achieves optimal performance for its intended cutting operations while maintaining resistance to bending, thereby preserving ease of operation despite reduced overall weight.

Inventive Principle:

Principle #3Local quality

3Weight of moving object

If the blade is thinned to reduce weight, then the weight of the kitchen knife is reduced, but it becomes difficult to cut food materials

Engineering Contradiction:

Improveweight of kitchen knifeVSAvoidefficiency of cutting food materials

Core Design Contradiction:

Weight of moving objectVSProductivity

Solution Approach 1:

The blade is segmented into a thin cutting edge for weight reduction and a thickened spine for maintaining structural integrity during cutting operations. This segmentation ensures that the thin blade does not bend during use, preserving cutting efficiency and productivity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The local thickening of the spine while maintaining a thin cutting edge creates optimal local properties: the thin edge reduces weight and facilitates cutting, while the thick spine provides the structural support needed to maintain cutting efficiency without bending.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20250073935A1Kitchen knife and method of manufacturing kitchen knife

Publication Date: 2025.03.06 KAI R&D CENT CO LTD

AI summary

A kitchen knife is provided. The kitchen knife may include a blade with a cutting edge at an end surface on one side and a reinforcing part provided in such a manner as to extend along a spine that is an end surface of the blade on the other side, and reinforcing the blade in a thickness direction. The reinforcing part is made of a metallic member and joined to the spine.