Handheld Tool Tube Routing for Handling Comfort
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Solution Overview
Problem
Handheld machine tools with tubes and cables for suction and power supply can cause discomfort and skin injuries due to their placement on the user's hand or arm, impairing handling, especially in high wall or overhead machining.
Innovation Solution
A tube-holding device is integrated into the handle part of the machine tool, spaced apart from the tube outlet, to securely guide the tube away from the user's hand and arm, allowing for adjustable positioning and secure fastening using a plug connection and rotatable design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the tube outlet is positioned on the handle part, then the tube can be connected to the machine tool, but the tube rests on the user's hand or arm causing discomfort and skin injuries
Solution Approach 1:
The tube outlet is repositioned from the handle part to the machining head, utilizing the spatial dimension above the user's hand. This dimensional relocation allows the tube to extend upward and away from the user's body, eliminating contact with the hand or arm while maintaining functional connection.
Solution Approach 2:
The connection tube serves as an intermediary element that bridges the tube outlet on the machining head and the vacuum cleaner. By routing the tube through this intermediate connection rather than directly from the handle, the tube path is redirected away from the user's body, preventing harmful contact.
2Ease of operation
If the tube outlet is positioned on the handle part, then the tube can be connected to the machine tool, but the tube chafes on the user's hand or arm
Solution Approach 1:
The tube outlet relocation to the machining head creates a three-dimensional tube path that ascends above the handle area. This spatial reconfiguration removes the tube from the contact zone between the user's hand/arm and the handle, eliminating chafing while preserving tube connection functionality.
3Ease of operation
If the tube outlet is positioned away from the handle part, then the tube is held away from the user's body, but the tube needs to be guided and held in position
Solution Approach 1:
The machining head structure itself provides the tube outlet positioning function, eliminating the need for separate tube guidance mechanisms on the handle. The machining head's design inherently guides the tube away from the user's body through its spatial configuration, allowing the system to serve its own tube routing needs without additional complexity.
Data Source
AI summary
The invention relates to a handheld machine tool, in particular a surface-finishing machine that includes a machining head, a handle part, and a connection arrangement which connects the machining head to the handle part, a tube outlet for connecting a tube being formed on the connection arrangement or on the handle part, a tube-holding device for holding the tube being provided on the handle part so as to be spaced apart from the tube outlet.