Utility Knife Collet With Intersecting Slots For Multiple Blade Types

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Solution Overview

Problem

Existing utility knives lack the ability to efficiently and securely hold multiple types of blades, limiting their versatility and functionality.

Innovation Solution

A utility knife design featuring a collet with intersecting slots of different dimensions, allowing for the secure reception and interchangeability of various blade types, along with a sleeve that co-rotates with the collet to move it to a secured position.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a utility knife uses a single blade type, then the structure is simple, but the versatility is limited

Engineering Contradiction:

Improveblade type compatibilityVSAvoidcollet structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The collet is designed with multiple slots of different dimensions (first slot with first dimension, second slot with second dimension) to accommodate different blade types, making a single knife handle capable of securing multiple blade configurations through one universal collet mechanism

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The collet body is segmented into multiple slots with different dimensions, where each slot is specifically configured to receive different blade types, allowing the single collet structure to handle multiple blade configurations simultaneously

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If a utility knife uses multiple slots for different blade types, then the versatility increases, but the blade securing reliability may be compromised

Engineering Contradiction:

Improveblade type compatibilityVSAvoidblade holding security

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

Each slot within the collet is designed with specific local dimensions and configurations tailored to different blade types, ensuring that each slot provides optimal securing for its corresponding blade while maintaining overall structural integrity

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The collet and sleeve are designed to be co-rotatable relative to the handle, allowing dynamic adjustment and secure positioning of different blade types through rotational movement that engages the appropriate slot configuration

Inventive Principle:

Principle #15Dynamics

3Ease of operation

If the collet and sleeve are co-rotatable to secure blades, then the ease of operation improves, but the device complexity increases

Engineering Contradiction:

Improveblade interchangeabilityVSAvoidcollet-sleeve mechanism

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The collet and sleeve are combined into an integrated co-rotatable mechanism where both components rotate together relative to the handle, simplifying the operation of blade interchange while maintaining the capability to secure multiple blade types through their coordinated rotational movement

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20250050516A1Utility knife

Publication Date: 2025.02.13 TECHTRONIC CORDLESS GP

AI summary

A utility knife includes a handle having a body and a receiving aperture. The utility knife further includes a collet at least partially receivable in the receiving aperture, and a sleeve that is engageable with and that surrounds the collet. The collet is configured to alternately receive one of a portion of a blade of a first type in a first slot and a portion of a blade of a second type in a second slot. The collet and the sleeve are co-rotatable relative the handle to move the collet to a secured position in which one of the blade of the first type and the blade of the second type are secured to the collet.