Quick Release Extension Rod With Elastic Positioning

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Solution Overview

Problem

Conventional extension rods for hand tools require a larger outer diameter and increased weight due to positioning-controlling structures, leading to inefficiencies in use and energy loss when driving tools.

Innovation Solution

A small outer diameter quick release extension rod design utilizing a sleeve with a screwdriver head accommodation portion, an operating unit with elastic elements and a returning spring, allowing for easy positioning and release of the screwdriver head, reducing the outer diameter and weight while enhancing flexibility and reducing energy loss.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional positioning-controlling structure with inner rod and slide sleeve is used, then the positioning and controlling function is achieved, but the outer diameter of the extension rod is increased

Engineering Contradiction:

Improvepositioning and controlling functionVSAvoidouter diameter of extension rod

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The patent extracts the positioning function from the complex inner rod-slide sleeve structure and implements it through a simplified design where the extension rod itself features a localized diameter enlargement with an elastic element that can be pressed into engagement with the drill bit's positioning groove, eliminating the need for separate positioning components

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent merges the positioning function into the extension rod structure itself by creating a diameter enlargement portion with an elastic element, combining what were previously separate positioning components into an integrated solution that maintains positioning reliability while reducing overall outer diameter

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If a conventional positioning-controlling structure with inner rod and slide sleeve is used, then the positioning and controlling function is achieved, but the weight of the extension rod is increased

Engineering Contradiction:

Improvepositioning and controlling functionVSAvoidweight of extension rod

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

The patent removes the heavy inner rod and slide sleeve components from the design, retaining only the essential positioning function through a lightweight diameter enlargement portion with an elastic element, significantly reducing the weight of the moving extension rod assembly

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent changes the structural parameters of the extension rod by introducing a localized diameter enlargement portion rather than using a uniformly thick-walled inner rod structure, achieving weight reduction while maintaining positioning capability through the elastic element engagement

Inventive Principle:

Principle #35Parameter changes

3Reliability

If a conventional positioning-controlling structure is used, then the positioning function is achieved, but the energy consumption of the power tool is increased

Engineering Contradiction:

Improvepositioning functionVSAvoidenergy consumption of power tool

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

By removing the heavy inner rod and slide sleeve structure and replacing it with a lightweight diameter enlargement portion and elastic element, the overall mass of the extension rod assembly is reduced, thereby decreasing the energy required by the power tool to accelerate and operate the tool during drilling operations

Inventive Principle:

Principle #2Taking out (Extraction)

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 design achieves a 30% reduction in outer diameter, improving usability and stability of the screwdriver head, and minimizing energy loss when using power tools by leveraging elongated sheet-shaped elastic elements for positioning control.

Implementation Method 1

at least one elastic element being elongated sheet-shaped and including a body portion connected between a pushed portion and an engaging portion... the pushed portion of the elastic element being abutted against the returning spring

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

a retuning spring being engaged the first positioning ring and the inserting end of the connecting rod, one end of the returning spring abutting against the first positioning ring

Methodology Applied

Scientific EffectElastic Recovery: Elastic Recovery

Data Source

PatentUS8864143B2Small outer diameter quick release extension rod

Publication Date: 2014.10.21 LIN YING MO

AI summary

A small outer diameter quick release extension rod is provided with elongated sheet-shaped elastic elements therein for realizing the effect of engaging with a screwdriver head. A second positioning ring in the operating element is used to press against the elastic elements to control them to be engaged in or disengaged from the screwdriver head. The small outer diameter quick release extension rod is easy to operate and has a relatively small outer diameter, not only reducing the structure weight and energy loss, but also enhancing the flexibility of use.