Scraper

Solution Overview

Problem

Conventional scrapers experience loosening of plastic components over time due to rubbing, leading to detachment issues between the metal blade and plastic handle, resulting in a less effective and durable tool.

Innovation Solution

A scraper design featuring two metal shells juxtaposed and combined with a blade and connecting member, where the shells and blade are soldered together for integral construction, with polished soldering portions for a smooth surface and enhanced durability, and additional support members for strength and assembly stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If plastic material is used for the handle, then the scraper can be made lightweight and easy to manufacture, but the retainers and clamping device easily become loosened due to rubbing during a long period of time

Engineering Contradiction:

Improveease of manufactureVSAvoidreliability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent changes the material parameter from plastic to metal for the handle, which fundamentally alters the friction and wear characteristics. The metal handle with polished surface reduces rubbing between retainers and the handle body, preventing loosening over time while maintaining manufacturability through stamping and soldering processes.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the plastic-mechanical retention system with a metal-soldered connection system. The retainers are soldered to the metal handle, creating a permanent mechanical bond that eliminates the rubbing and loosening issues inherent in plastic-based mechanical retention systems.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of manufacture

If plastic material is used for the handle, then the scraper can be manufactured with simple molding processes, but the projections of the handle are easily detached from the holes of the blade during a long period of time

Engineering Contradiction:

Improveease of manufactureVSAvoidstability

Core Design Contradiction:

Ease of manufactureVSStability of the object's composition

Solution Approach 1:

The patent changes the material parameter from plastic to metal for the handle, which fundamentally alters the friction and wear characteristics. The metal handle with polished surface reduces rubbing between retainers and the handle body, preventing loosening over time while maintaining manufacturability through stamping and soldering processes.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the plastic-mechanical retention system with a metal-soldered connection system. The retainers are soldered to the metal handle, creating a permanent mechanical bond that eliminates the rubbing and loosening issues inherent in plastic-based mechanical retention systems.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If metal shells are used instead of plastic, then the durability and resistance to rubbing is improved, but the manufacturing process becomes more complex with soldering and polishing steps

Engineering Contradiction:

ImprovereliabilityVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent divides the handle into two separate metal shell halves that are stamped individually and then joined through soldering. This segmentation allows for simpler individual component manufacturing while achieving the desired durability through the combined metal construction and soldered joint.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent extracts the polishing step to be applied only to specific surfaces (the outer surfaces of the handle shells) rather than the entire component. This selective polishing reduces manufacturing complexity while still achieving the desired smooth finish for durability and aesthetics.

Inventive Principle:

Principle #2Taking out (Extraction)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The metal scraper design provides a lightweight, durable, and easy-to-clean tool with improved assembly and functionality, reducing the likelihood of component detachment and enhancing the user experience.

Implementation Method 1

The first soldering portions of the two shells are juxtaposed and combined together by soldering so that the two shells are combined integrally

Methodology Applied

Scientific EffectSoldering: Soldering

Implementation Method 2

The first soldering portions of the two shells are worked by polishing after the first soldering portions are soldered

Methodology Applied

Scientific EffectAbrasion: Abrasion

Data Source

PatentUS10595699B2Scraper

Publication Date: 2020.03.24 CHANG JASON

AI summary

A scraper includes two shells juxtaposed and soldered together, a blade combined with the two shells, and a connecting member combined with the two shells. Each of the two shells has a receiving space, a plurality of first soldering portions, a first opening, a first slot, a second soldering portion, and a third soldering portion. The blade has an operation portion and a first mounting portion. The first mounting portion extends through the first opening into the receiving space and has a fourth soldering portion combined with the second soldering portions of the two shells by soldering. The connecting member is located in the receiving space and has a second slot aligning with the first slot. The connecting member has two ends each provided with a fifth soldering portion combined with the third soldering portion by soldering.