Insulated Screwdriver With Elastic Sleeve For Live Electrical Work
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Solution Overview
Problem
Working on live electrical systems without shutting down entire installations poses risks of electrical shock and short circuits due to the need to manually hold screws, which is hazardous and prone to human error, especially in control and distribution cabinets with adjacent live components.
Innovation Solution
An electrically insulated screwdriver with a metal blade and insulating jacket, featuring an axially elastic intermediate piece that allows compression and expansion, ensuring reliable contact protection and preventing short circuits by securely holding screws without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual screw holding is used, then ease of operation is maintained, but safety and reliability deteriorate due to risk of electrical shock and short circuits
Solution Approach 1:
The screwdriver is designed to automatically hold and release screws through its own mechanism. The blade features a retaining element that grips the screw during insertion and automatically releases it when the screw is fully driven in, eliminating the need for manual holding while maintaining electrical safety through the insulating jacket.
Solution Approach 2:
The insulating jacket acts as an intermediary between the metal blade and the electrical environment. It provides electrical isolation while the blade performs the screwdriving function, allowing automatic screw retention without compromising safety.
2Reliability
If automatic screw holding mechanism is added, then safety and reliability improve, but device complexity increases
Solution Approach 1:
The screw retention function is merged with the blade structure itself. The retaining element is integrated into the blade's front region, combining the driving and retaining functions in a single component rather than adding a separate mechanism, thus minimizing device complexity while improving reliability.
3Ease of operation
If insulating jacket is designed to be axially expandable, then ease of operation improves for screw insertion, but manufacturing precision requirements increase
Solution Approach 1:
The insulating jacket is designed with dynamic properties, being axially expandable to accommodate the screw during insertion. This expandability is achieved through controlled flexibility in the jacket structure, allowing it to adapt during operation while maintaining sufficient rigidity for electrical insulation and screw retention.
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
The screwdriver provides safe and reliable operation by maintaining electrical insulation and preventing accidental contact with live parts, reducing the risk of electrical shock and short circuits, thus enhancing worker safety and operational efficiency.
Implementation Method 1
a part 4 which is elastic in the axial direction and is connected thereto
Data Source
Figure 1~2
AI summary
The screwdriver has a shaft (21) including a rear end region rotationally rigidly anchored in a handle (1). The shaft includes a front profile head (22) adapted to a profiling of an engaging region of a screw. Bushing parts (3, 5), an elastic part (4) and a front insulating sleeve part (6) surround the shaft. A head part is arranged at a front end of the front insulating sleeve part. The head part includes a sidewardly opened opening, and a center, slot-like sidewardly opened opening at a front wall. A front end part of the shaft forming the profile head projects through the openings. The handle is made of an electrically insulating material i.e. plastic. The shaft is made of metal.