Concave-Arc Pliers Back for Safe Chipping and Cutting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Multifunction pliers used in telecommunications and water/electricity maintenance pose safety risks due to exposed knives that can injure users and damage workpieces during cutting and chipping operations.
Innovation Solution
The pliers feature a chipping blade in a concave arc shape with varying blade angles between 120-135 degrees and a straight cut with angles between 85-90 degrees, allowing for safe chipping without damaging workpieces and preventing user injury by keeping clamps closed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple knives are provided on inner sides of the two pliers to perform cutting operations, then the cutting function is improved, but the safety of use deteriorates due to risk of user injury and workpiece damage
Solution Approach 1:
The chipping function is extracted from the inner side knife configuration and placed on the outer side of one pliers back, separating the chipping operation from the cutting knives. This allows chipping to be performed independently without exposing users to the sharp cutting edges on the inner sides.
Solution Approach 2:
The chipping blade on the pliers back serves as an intermediary tool for chipping operations, replacing the need to use inner side knives for chipping. This intermediary element performs the chipping function while keeping the original cutting knives hidden and safe.
2Ease of operation
If the handles are opened to expose the knives for cutting operations, then the cutting accessibility is improved, but the safety of use deteriorates
Solution Approach 1:
The chipping blade is extracted from the inner knife assembly and positioned on the outer side of the pliers back, allowing chipping operations to be performed without opening the handles and exposing the cutting knives.
Solution Approach 2:
Instead of placing the chipping function on the inner side where knives are exposed, the chipping blade is inverted to the outer side of the pliers back, where it can be accessed safely without exposing users to sharp cutting edges.
3Productivity
If the chipping blade has a sharp edge for effective chipping, then the chipping efficiency is improved, but the safety of use deteriorates due to risk of user injury
Solution Approach 1:
The chipping blade is extracted and positioned on the outer side of the pliers back, separating it from the sharp cutting knives on the inner sides. This allows the chipping blade to have sufficient sharpness for efficient chipping while being spatially separated from the cutting function that poses higher injury risk.
Solution Approach 2:
The chipping blade has localized sharpness only at the working edge needed for chipping, while the rest of the blade and the surrounding pliers structure provide safety. The sharpness is concentrated only where needed for the chipping function, not throughout the entire tool.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A pliers includes a first pliers body (10) and a second pliers body (20). The first pliers body includes a first handle (11) and a first clamp (12). A first pliers knife (13) and a first pliers back (14) are disposed on the first clamp (12). The second pliers body (20) includes a second handle (21) and a second clamp (22). A second pliers knife (23) and a second pliers back (24) are disposed on the second clamp (22). The second clamp (22) is pivotally connected with the first clamp (12) to clamp or cut. The first pliers back (14) or the second pliers back (24) is provided with a chipping blade (50) configured in a concave arc shape for chipping.