Manual Tool Cable Connection for Handle Detachment

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Solution Overview

Problem

Existing hand-operated processing devices require complex disassembly and tool usage to access the electrical plug connection, making it difficult to remove the handle housing body from the first housing body.

Innovation Solution

The electrical cable connection is designed with additional cable length that follows the movement of the handle housing body from the use position to the release position, allowing the electrical plug connection to be accessible in a transition area for finger-actuated detachment, eliminating the need to open the first housing body or use tools.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the electrical plug connection is arranged inside the first housing body to be inaccessible from the outside, then the electrical connection is protected and secure, but the handle housing body cannot be easily removed without opening the first housing body and using tools

Engineering Contradiction:
ImproveEase of removing handle housing bodyVSAvoidComplexity of disassembly process
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The electrical plug connection is moved from the interior of the first housing body to a transition area on the outer surface, changing its spatial dimension from internal to external accessibility. This allows the plug connection to be accessed without opening the housing body, enabling tool-free detachment of the handle housing body while maintaining electrical connection security through the transition area design.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Ease of operation

If the electrical cable connection is made accessible for finger-actuated detachment, then the handle housing body can be easily removed, but the cable connection may obstruct the movement of the handle housing body from use position to release position

Engineering Contradiction:
ImproveAccessibility of electrical plug connectionVSAvoidMovement range of handle housing body
Core Design Contradiction:
Ease of operationVSAdaptability or versatility

Solution Approach 1:

The electrical cable connection uses a flexible cable design that can bend and extend, allowing the handle housing body to move freely from the use position to the release position. The flexible cable accommodates the movement range while keeping the plug connection accessible in the transition area, eliminating obstruction during the detachment process.

Inventive Principle:
Principle #30Flexible shells and thin films

3Ease of repair

If the electrical plug connection is placed in a transition area between the first housing body and handle housing body, then finger-actuated detachment is possible without tools, but the plug connection may be exposed to damage or accidental disconnection

Engineering Contradiction:
ImproveEase of detaching electrical connectionVSAvoidSecurity of electrical connection
Core Design Contradiction:
Ease of repairVSReliability

Solution Approach 1:

The design requires the handle housing body to be moved to a specific release position before the electrical plug connection becomes accessible for detachment. This preliminary action of positioning ensures that intentional detachment is required, preventing accidental disconnection while still allowing easy tool-free removal when needed. The transition area placement combined with position-dependent accessibility balances security and ease of repair.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentEP3811758B1Manual working tool with electrical cable connection
Publication Date: 2023.08.02 ANDREAS STIHL AG & CO KG
  • EP3811758B1 patent drawingFigure 1~2
  • EP3811758B1 patent drawingFigure 3
  • EP3811758B1 patent drawingFigure 4~5

AI summary

The invention relates to a hand-operated processing device comprising a first housing body (1), a device connection part extending away from the first housing body (1), a handle housing body (3) which forms a second housing body and is slidably held on the device connection part, wherein in a use position (3b) it rests against the first housing body and is fixed to the first housing body and/or to the device connection part and is moved away from the first housing body (1) in a release position displaced on the device connection part, and an electrical cable connection (4) which is fixed at a first fixing point (4a) in or on the first housing body (1), is fixed at a second fixing point (4b) in or on the handle housing body (3) and has a finger-operated releasable electrical plug connection (5) between the two fixing points (4a, 4b), which is inaccessible in the use position (3b) of the handle housing body (3).According to the invention, the electrical cable connection (4) has an additional cable length (4c) with which it follows the movement of the handle housing body (3) from the operating position to the release position, and the electrical plug connection (5) is accessible for finger-operated release in a transition area between the first housing body (1) and the handle housing body (3) when the handle housing body (3) is in the release position.