Adjustable Wire Puller Handle for Smooth Pull Cord Transport
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Solution Overview
Problem
Existing wire puller handles are unable to adjust the appropriate resistance to accommodate different wire diameters and thicknesses of the pull cord, leading to abrasion and difficulty in smooth transportation.
Innovation Solution
A wire puller handle design featuring a grip, base, pinch roller set, and guiding roller set, with adjustable pinch rollers and a plastic grip for ergonomic handling, allowing for adjustable pressure on the pull cord to accommodate various diameters and thicknesses, and metal pinch rollers to prevent wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the pressing body presses on the pull cord with great resistance, then the pull cord can be driven more effectively, but the wire puller handle and pull cord are easy to be abrasion
Solution Approach 1:
The patent introduces a pressing body made of plastic material as an intermediary between the metal handgrip body and the pull cord. This plastic pressing body acts as a mediator that reduces direct contact and abrasion between the metal handgrip and the pull cord surface, while still providing sufficient pressing force for effective transportation.
Solution Approach 2:
The patent employs a fastener that can be adjusted to move toward different grooves on the pressing body, allowing the pressing force parameter to be changed according to different wire diameters and pull cord thicknesses. This enables optimization of the pressing force to achieve effective transportation while minimizing unnecessary abrasion.
2Object-affected harmful factors
If the resistance of the pressing body pressing on the pull cord is too small, then abrasion is reduced, but transportation of the pull cord is not smooth or hard to be driven
Solution Approach 1:
The fastener mechanism allows users to adjust the pressing force parameter by moving the fastener to different grooves corresponding to different wire diameters and pull cord thicknesses. This parameter adjustment ensures sufficient pressing force for smooth transportation while avoiding excessive force that would cause abrasion.
Solution Approach 2:
The pressing force is made dynamically adjustable through the fastener mechanism rather than being fixed. This allows the system to adapt the pressing force level to match the specific requirements of different pull cords, ensuring optimal performance without unnecessary abrasion.
3Strength
If the handgrip body is made of metal with heavy weight, then strength is improved, but it is not ideal for electricians to use in working sites
Solution Approach 1:
The patent combines metal and plastic materials in a composite structure: the handgrip body is made of metal for strength, while the pressing body is made of plastic material to reduce weight and minimize abrasion. This composite material approach achieves both strength and ease of operation.
Solution Approach 2:
The handgrip device is segmented into different functional parts with different materials: the metal handgrip body provides structural strength, while the plastic pressing body provides lightweight operation and reduced abrasion. This segmentation allows each part to be optimized for its specific function.
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 smooth and stable transportation of pull cords with adjustable pressure, reducing abrasion and enhancing usability for electricians by providing ergonomic grip and durable pinch rollers.
Implementation Method 1
The inner surface 122 of the pressing body 12 is reciprocally rubbed by the rough surface 101 of the pull cord 100 to form a worn groove 123 due to a great resistance
Data Source
AI summary
A wire puller provided for conveyance of a pull cord, includes a grip, a base, a pinch roller set, and a guiding roller set. The grip is connected to the base and includes an adjustment part. The pinch roller set is pressed and limited by the adjustment part and includes a cover part pivotally connected to the base, a rotating body pivotally connected to the cover part, and two pinch rollers pivoted at two ends of the rotating body. The guiding roller set is arranged in an inner space of the base and includes a first guiding roller with a long shaft rod, a second guiding roller and a belt arranged on the first guiding roller and the second guiding roller. The wire puller handle is configured to drive the pull cord between the guiding roller set and the two pinch rollers by rotating the long shaft rod.