Telescopic Magnetic Bit Extension Rod for One-Handed Replacement
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Solution Overview
Problem
Existing hand-powered and electric tool technologies face challenges in conveniently replacing bits in extension rods due to strong magnetic forces, which require significant manual effort and often necessitate the use of additional tools like pliers.
Innovation Solution
A high-intensity magnetic bit extension rod with a telescopic unlocking function is designed, featuring a connecting rod sleeve, a magnet, and a connecting rod handle. The system includes a partition structure and a magnetic conduction structure between the magnet and the tool bit sleeve, allowing for a telescopic unlocking mechanism that enables easy bit replacement with one hand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the magnetic force of the magnet is increased to improve screw supporting effect, then the screw supporting capability is improved, but the force required to separate the bit from the extension rod increases, making bit replacement difficult
Solution Approach 1:
The magnet is designed to be movable relative to the bit through a telescopic structure. During normal operation, the magnet is positioned close to the bit for strong magnetic attraction. During bit replacement, the magnet can be telescoped away from the bit, reducing magnetic force and enabling easy bit removal without requiring additional tools or excessive force.
Solution Approach 2:
The extension rod is divided into separable components including the magnet, connecting rod sleeve, and slidable limiting tubing. This segmentation allows the magnet to be independently positioned and moved relative to the bit, enabling the system to switch between strong magnetic attraction during operation and easy bit release during replacement.
2Ease of operation
If a magnet drive apparatus is added to control magnet movement, then the magnet can be positioned away from the bit for replacement, but the device complexity increases and the outer diameter of the front end increases
Solution Approach 1:
The magnet movement control function is merged with the existing telescopic structure of the extension rod. The connecting rod sleeve and slidable limiting tubing serve dual purposes: they provide the telescopic mechanism for length adjustment and simultaneously control the magnet's position relative to the bit. This eliminates the need for separate magnet drive apparatus while achieving the same functional goal.
Solution Approach 2:
The telescopic structure components (connecting rod sleeve, slidable limiting tubing) are designed to perform multiple functions: they enable length adjustment of the extension rod and simultaneously control the magnet's axial position. This multi-functionality reduces overall device complexity by combining what would otherwise require separate mechanisms.
3Strength
If the magnet diameter is increased to improve magnetic attraction, then the screw supporting capability is improved, but the device cannot be used in small spaces
Solution Approach 1:
The magnet's axial position is made dynamic through the telescopic structure. During operation, the magnet can be positioned close to the bit to maximize magnetic attraction, allowing use of a smaller magnet diameter. During replacement, the magnet telescopes away from the bit, reducing the magnetic field interference and enabling easy bit removal. This dynamic positioning allows optimization of magnet size for operational requirements rather than being constrained by maximum diameter limits.
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 telescopic unlocking function allows for effortless bit replacement with one hand, while the larger diameter magnet enhances magnetic attraction, improving screw supporting capability and allowing for use in smaller spaces.
Implementation Method 1
the magnetism of the bit mainly comes from a magnet disposed in the extension rod at which the bit is mounted
Implementation Method 2
a magnetic conduction structure is/are further disposed between the magnet and a bottom of the tool bit sleeve
Data Source
AI summary
A high-intensity magnetic bit extension rod with a telescopic unlocking function is provided, which includes a connecting rod sleeve, a magnet, and a connecting rod handle, where a tool bit sleeve configured to connect a tool bit is disposed at a front end of the connecting rod sleeve, a slidable limiting tubing is disposed at a rear end of the connecting rod sleeve, the magnet is disposed at a front end of the connecting rod handle, and a partition structure or/and a magnetic conduction structure is/are further disposed between the magnet and a bottom of the tool bit sleeve; and the connecting rod sleeve and the slidable limiting tubing are synchronously axially slidable relative to the connecting rod handle and the magnet.