Compound Action Snips Recessed Fastener Design

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing compound action snips suffer from interference between the second fastener and the object being cut due to its exposure on the external surface, which hampers cutting efficiency.

Innovation Solution

The design incorporates first and second handles pivotally connected with blades, where a fastener and fixing elements are inserted through recesses in the handles and blades, ensuring that the top surface of the fixing elements is not exposed, thus preventing interference with the object being cut.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the second fastener is exposed on the external surface of the handle, then the fastening structure is simple and easy to manufacture, but the fastener interferes with the object being cut during cutting

Engineering Contradiction:

Improvefastening structure simplicityVSAvoidinterference with object being cut

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The fixing element is nested within a recess formed in the handle's external surface. The recess receives the fixing element such that its top surface is not exposed out of the handle, effectively hiding the fastener within the handle structure while maintaining the fastening function. This eliminates interference with the object being cut.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Object-affected harmful factors

If the fixing element is received in the recess, then interference with the object being cut is eliminated, but the manufacturing complexity increases

Engineering Contradiction:

Improveinterference with object being cutVSAvoidhandle structure complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

Instead of redesigning the entire handle structure, a recess is formed only in the specific local area where the fixing element is located. This localized modification allows the fixing element to be received without exposure while keeping the rest of the handle structure simple and easy to manufacture.

Inventive Principle:

Principle #3Local quality

3Productivity

If the fixing element is received in the recess, then cutting efficiency is improved, but the assembly process becomes more complex

Engineering Contradiction:

Improvecutting efficiencyVSAvoidassembly process complexity

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The recess is pre-formed in the handle during the handle manufacturing process, before the fastening assembly is completed. This preliminary preparation of the recess ensures that when the fixing element is installed, it can be received in the recess without requiring additional assembly steps or modifications, thus maintaining ease of assembly while achieving the benefit of eliminated interference.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS9027253B2Compound action snips

Publication Date: 2015.05.12 ALLPROFESSIONAL MFG

AI summary

Compound action snips includes include first and second handles pivotally connected to each other, and first and second blades. The first handle includes first and second walls arranged opposite to each other. The second wall includes a recess. The first blade is mounted to the first handle. The second blade is mounted to the second handle. A fastener inserts through the first wall, the first blade, and the second wall. A fixing element is received into the recess and threaded onto the fastener, so that a top surface defined on the fixing element is not exposed out of the second wall of the first handle.