Scraping tool

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Solution Overview

Problem

Existing scraping tools have complex structures and high manufacturing costs, with scraper blades held by frictional force, leading to potential slippage under larger forces.

Innovation Solution

A scraping tool design featuring a first and second holding member with connecting portions and through-grooves, along with a locking device that allows the second holding member to sway between holding and extended positions, enabling easy detachment and rapid replacement of the scraper blade.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a cam-like structure with a control button is used to hold the scraper blade, then the blade can be held tightly, but the structure becomes complicated and manufacturing cost increases

Engineering Contradiction:

Improveblade holding stabilityVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The holding mechanism is segmented into discrete components: a holding member with a holding portion, a blade with positioning protrusions, and a locking device with a locking protrusion. This segmentation simplifies the overall structure while maintaining reliable blade holding through the interaction of these simple, well-defined parts.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The complex cam-like structure and control button mechanism are completely removed from the design. Instead, a simple locking device with a locking protrusion is extracted and integrated directly into the holding member, eliminating unnecessary complexity while preserving the blade holding function.

Inventive Principle:

Principle #2Taking out (Extraction)

2Device complexity

If frictional force is used to fix the scraper blade, then the structure can be simple, but the blade slides when subject to larger forces

Engineering Contradiction:

Improvestructure simplicityVSAvoidblade fixation stability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

A locking device with a locking protrusion is introduced as an intermediary mechanical element between the holding member and the blade. This locking protrusion engages with positioning protrusions on the blade, providing positive mechanical interlocking that prevents blade slippage under large forces while maintaining structural simplicity.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The friction-based mechanical holding system is replaced with a positive locking mechanical system. The locking protrusion and positioning protrusions create a deterministic mechanical interlock that reliably prevents blade movement under load, eliminating the unreliability of friction-based holding.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Length of stationary object

If the jaw clamp travel is short, then the structure can be compact, but the scraper blade can only be fixed by frictional force and may slide under larger forces

Engineering Contradiction:

Improvejaw clamp travel distanceVSAvoidblade fixation stability

Core Design Contradiction:

Length of stationary objectVSReliability

Solution Approach 1:

The locking device with the locking protrusion serves as a mediator that provides reliable blade fixation independent of the jaw clamp travel distance. This intermediary locking mechanism ensures the blade remains securely fixed even when the jaw clamp has limited travel, eliminating the need for long travel distances to achieve adequate friction-based holding.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Productivity

If a rapid replacement mechanism is implemented, then blade replacement speed increases, but the structure becomes more complex

Engineering Contradiction:

Improveblade replacement speedVSAvoidassembly structure complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The blade and holding member are segmented into easily separable components with standardized interfaces (locking protrusion and positioning protrusions). This segmentation enables rapid blade replacement by allowing the user to simply disengage the locking protrusion and remove the blade, achieving high productivity without complex replacement mechanisms.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of using a complex mechanism to actively drive blade replacement, the design inverts the approach by creating a passive locking system that can be easily disengaged. The simple locking protrusion design allows for rapid blade changes through straightforward manual operation, achieving fast replacement without active mechanical complexity.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS10723030B2Scraping tool

Publication Date: 2020.07.28 GOODLY CH ENTERPRISE

AI summary

A scraping tool includes a first holding member having a first through-groove between a first holding portion and a first connecting portion. A second holding member includes a second through-groove between a second holding portion and a second connecting portion. The second connecting portion is connected to the first connecting portion to permit the second holding member to sway relative to the first holding member between a holding position and an extended position. A locking device includes first and second abutting portion respectively abutting against the first and second holding member and a sliding portion slideably extending through the first and second through-groove. The locking device is movable relative to the first and second holding member between a locking position in which the second holding member is in the holding position and a release position in which the second holding member is movable to the extended position.