Integrated Screwdriver Handle with Nested Shafts

Solution Overview

Problem

Existing screwdrivers are not space-efficient and flexible, as they typically consist of separate tools for different functions, leading to increased production costs and weight.

Innovation Solution

A screwdriver design that combines two tools in one, featuring a handle with a first shaft and a second detachable shaft, allowing for a conventional screwdriver and a stubby screwdriver to be integrated, with non-rotatable coupling and magnetic holding means for secure connection and easy bit access.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If two separate screwdrivers are used for different functions, then each screwdriver can be optimized for its specific function, but the total weight and production costs increase

Engineering Contradiction:

Improvefunctional versatilityVSAvoidtotal weight

Core Design Contradiction:

Adaptability or versatilityVSWeight of moving object

Solution Approach 1:

The patent combines two separate screwdriver tools into a single integrated device. The first shaft and second shaft are integrated within a common handle structure, allowing both conventional screwdriver functionality and stubby screwdriver functionality to coexist in one tool, thereby reducing total weight and production costs while maintaining functional versatility

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The handle structure is designed to support multiple functions: it can accommodate both the first shaft for conventional screwdriver use and the second shaft for stubby screwdriver use. The detachable connection system allows the user to switch between functions, making the single tool universal for different screwdriver applications

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If two separate screwdrivers are used for different functions, then each screwdriver can be optimized for its specific function, but production costs increase

Engineering Contradiction:

Improvefunctional versatilityVSAvoidproduction cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent combines two separate screwdriver tools into a single integrated device. The first shaft and second shaft are integrated within a common handle structure, allowing both conventional screwdriver functionality and stubby screwdriver functionality to coexist in one tool, thereby reducing total weight and production costs while maintaining functional versatility

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The handle structure is designed to support multiple functions: it can accommodate both the first shaft for conventional screwdriver use and the second shaft for stubby screwdriver use. The detachable connection system allows the user to switch between functions, making the single tool universal for different screwdriver applications

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Device complexity

If a conventional screwdriver design is used, then structural simplicity is maintained, but space efficiency is reduced

Engineering Contradiction:

Improvestructural simplicityVSAvoidspace efficiency

Core Design Contradiction:

Device complexityVSVolume of moving object

Solution Approach 1:

The second shaft is inserted into the handle structure in a nested arrangement. When the second handle part is connected to the first handle part, the second shaft extends into a recess in the first handle part, creating a compact nested configuration that improves space efficiency while maintaining structural simplicity through the detachable connection system

Inventive Principle:

Principle #7Nested doll (Nesting)

4Volume of moving object

If the second shaft is integrated into the first handle part, then space efficiency is improved, but the complexity of connection mechanisms increases

Engineering Contradiction:

Improvespace efficiencyVSAvoidconnection mechanism complexity

Core Design Contradiction:

Volume of moving objectVSDevice complexity

Solution Approach 1:

The handle is segmented into a first handle part and a second handle part that can be detachably connected. The second shaft is integrated into the second handle part and can be inserted into the first handle part. This segmentation allows for easy assembly and disassembly while maintaining a compact integrated appearance when connected, balancing space efficiency with connection simplicity

Inventive Principle:

Principle #1Segmentation

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 combined screwdriver saves resources in production, reduces weight, and provides a space-efficient tool that can be used as a single unit while offering the functionality of two separate screwdrivers, with easy bit changes and secure handling.

Implementation Method 1

mit einem nicht drehbar gekoppelten ersten Mittelteil (14) und einem zweiten Mittelteil (16), der lösbar an den ersten Mittelteil (14) ansetzbar ist, wobei der zweite Mittelteil (16) nicht drehbar mit einem zweiten Schaft (22) verbunden ist und der zweite Schaft (22) wenigstens teilweise lösbar in den ersten Mittelteil (14) einsetzbar ist

Methodology Applied

Scientific EffectMagnetic holding: Magnetism

Data Source

PatentEP3421181B9Screwdriver

Publication Date: 2021.05.19 ADOLF WURTH GMBH & CO KG

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AI summary

The invention relates to a screwdriver with a handle and a first shaft, wherein the handle has a first handle part which is rotationally fixed to the first shaft and a second handle part which is detachably connected to the first handle part, wherein the second handle part is rotationally fixed to a second shaft.