Scissor Equal Divider With Pivoting Indicator Plates
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Solution Overview
Problem
Existing equal dividers are prone to deformation or breakage due to collisions with foreign objects and have a difficult riveting operation, which affects their ability to maintain effective marking of equidistant lines.
Innovation Solution
The equal divider features a scissor structure with pivoting parts and indicator plates, incorporating shaft tubes and screw bolts with stoppers to allow expansion and shrinkage while preventing protrusion and enabling free rotation, and includes a through groove to prevent deformation during use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the indicating parts are allowed to protrude outward for marking purposes, then the marking function is improved, but the indicating parts are subject to deformation or breakage due to collision with foreign objects
Solution Approach 1:
The patent applies beforehand cushioning by providing a limiting structure (the top surface of the mainframe) that prevents the indicating parts from protruding beyond a safe distance. This prior constraint protects the indicating parts from collision with foreign objects while still allowing them to extend far enough to perform marking functions effectively.
2Ease of operation
If the riveting operation is made effective for free rotation, then the pivoting function is improved, but the riveting operation becomes quite difficult
Solution Approach 1:
The patent applies parameter changes by modifying the riveting parameters - specifically using rivets with appropriate hole diameters and positioning that balance rotational freedom with assembly ease. The riveting holes are designed with precise dimensions that allow the connecting rods to rotate freely while maintaining structural integrity, making the riveting operation feasible without excessive difficulty.
3Adaptability or versatility
If the mainframe is designed to expand and shrink for adaptability, then the versatility is improved, but the structure becomes more complex
Solution Approach 1:
The patent applies segmentation by dividing the mainframe into multiple discrete connecting rods that can pivot relative to each other. This segmentation enables the scissor structure to expand and shrink through the pivoting action of individual rod segments, providing adaptability while keeping each component relatively simple in design.
Solution Approach 2:
The patent applies dynamics by designing the mainframe as a dynamic scissor structure with movable pivoting joints rather than a fixed rigid structure. This allows the mainframe to change its configuration (expand and shrink) in response to operational requirements, providing versatility through dynamic adjustment capability.
Data Source
AI summary
Disclosed is an equal divider, including a mainframe and a plurality of indicator plates, wherein the mainframe is mainly made up of a plurality of first connecting rods and a plurality of second connecting rods pivoted by a plurality of pivoting structures to form a scissor structure. The mainframe is formed with a plurality of first pivoting parts and a plurality of second pivoting parts. The first pivoting parts and the second pivoting parts pivot the first connecting rods and the second connecting rods. The indicator plate is configured between the first connecting rod and the second connecting rod. The indicator plate is configured with a protruding indicating part. Each indicator plate is configured with a long through groove. The second pivoting part goes through the through groove. The indicating parts and the first pivoting parts maintain a fixed distance along the second axial direction.