Three-Handle Crimping Pliers for One-Handed Wire Sleeve Pressing
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Solution Overview
Problem
Existing pliers with two handles and two joints lack an efficient mechanism for one-handed operation and effective pressing of wire end sleeves on cables, particularly in terms of lever force and ease of handling.
Innovation Solution
The addition of a third plier handle connected rigidly to one of the plier jaws, allowing for one-handed initiation of the pressing process, combined with tooth-like protrusions on the pressing jaws that facilitate initial connection during slight closure, enabling a reliable hold on the cable before full closure with both hands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional two-handle pliers are used, then the structure is simple, but one-handed operation is difficult and lever force is insufficient
Solution Approach 1:
The additional plier handle enables the tool to perform multiple functions: it can be operated with one hand using the additional handle for initiation, or with two hands for full pressing force. This multi-functional design resolves the contradiction by allowing the user to choose the appropriate operating mode based on the task requirements.
Solution Approach 2:
The plier handle system is segmented into a main handle and an additional handle, each serving distinct functions. The additional handle is specifically designed for one-handed operation to initiate the pressing process, while the main handle provides leverage for completion. This segmentation allows independent optimization of each handle's function.
2Force
If the plier length is increased to improve lever force, then pressing force increases, but the tool becomes longer and less maneuverable
Solution Approach 1:
Instead of increasing lever force solely through longer handles in one dimension, the invention adds a second handle that creates a new dimensional configuration. The additional handle is positioned to provide leverage in a different spatial arrangement, allowing effective pressing force without proportionally increasing the overall tool length.
3Reliability
If the pressing jaws have smooth edges, then the structure is simple, but initial connection and holding of the cable is unreliable
Solution Approach 1:
The pressing jaws have different surface qualities at different locations: the outer edges feature tooth-like protrusions for reliable initial connection and holding, while the inner pressing surfaces remain smooth for proper crimping. This local differentiation of surface quality allows each region to perform its specific function optimally.
4Stability of the object's composition
If the additional plier handle is articulated to both handles, then the structure is more stable, but the device complexity increases
Solution Approach 1:
The additional plier handle is merged with the existing joint structure by connecting it to the fifth joint that already articulates the two main handles. This merging approach provides stable connection without adding independent articulation mechanisms, thereby maintaining structural stability while minimizing additional complexity.
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
Enables one-handed initiation of the pressing process, ensuring a secure hold on the cable without requiring additional hand support, allowing for efficient crimping of wire end sleeves with enhanced lever force and reduced plier length.
Implementation Method 1
The addition of a third plier handle connected rigidly to one of the plier jaws, allowing for one-handed initiation of the pressing process, combined with tooth-like protrusions on the pressing jaws that facilitate initial connection during slight closure
Implementation Method 2
tooth-like protrusions on the pressing jaws that facilitate initial connection during slight closure, enabling a reliable hold on the cable before full closure with both hands
Data Source
AI summary
Pliers including plier handles and two plier jaws which are movable between an open position and a closed position. The plier jaws are connected to one another in an articulated manner by first and second joints, and are connected to the plier handles in an articulated manner by third and fourth joints. The plier handles are connected directly to one another in an articulated manner by a fifth joint between the third and the fourth joints. An additional plier handle is provided, which in the open position extends in a pivoting direction of the plier handles between the plier handles. The additional plier handle extends starting at one of the plier jaws and is rigidly connected to this plier jaw for pivoting purposes.