Compound Action Snips Recessed Fastener Assembly

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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 effective cutting.

Innovation Solution

The design incorporates a recess in the second wall to house the fixing element, ensuring it is not exposed, and uses fasteners and fixing elements to securely connect the handles and blades without external interference, allowing for uninterrupted cutting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the second fastener is exposed on the external surface of the handle, then the fixing element can be easily accessed and installed, but it causes interference with the object being cut during cutting

Engineering Contradiction:

Improveaccessibility of fixing elementVSAvoidinterference with object being cut

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The fixing element is nested within a recess formed in the second wall of the handle. The recess receives the fixing element such that its top surface is not exposed out of the second wall, eliminating interference with the object being cut while maintaining secure attachment of the fastener assembly

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The solution moves the fixing element from an exposed external position to an internal position within the recess. This dimensional relocation places the fixing element in a different spatial dimension (inside the handle wall rather than outside), resolving the interference issue while preserving functionality

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Object-affected harmful factors

If the fixing element is received in the recess, then interference with the object being cut is eliminated, but the fixing element becomes less accessible for installation and maintenance

Engineering Contradiction:

Improveinterference with object being cutVSAvoidaccessibility of fixing element

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The handle structure is segmented into distinct functional zones: the recess area for housing the fixing element, the fastener passage area for inserting and removing fasteners, and the external handle surface for gripping. This segmentation allows the fixing element to be hidden during operation while remaining accessible through the structured opening mechanism

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS8950075B2Compound action snips

Publication Date: 2015.02.10 ALLPROFESSIONAL MFG

AI summary

Compound action snips 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 is 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.