Adjustable Guide Device for Hand-Held Power Tools
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Solution Overview
Problem
Existing guide devices for hand-held power tools, such as jigsaws, are bulky and inconvenient for transport due to their fixed and expansive designs, limiting flexibility and space efficiency.
Innovation Solution
A compact guide device with adjustable, flexible expansion straps that can be rolled up for storage, featuring a clamping mechanism and winding device to manage the straps, allowing for adjustable lengths and easy detachment from the power tool without tools, enhancing usability and space-saving capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed and expansive guide device design is used, then guidance precision is maintained, but transport convenience and space efficiency deteriorate
Solution Approach 1:
The guide device employs a flexible expansion strap that can dynamically adjust its length and configuration. The strap can be extended to provide precise guidance during operation and rolled up to a compact size for transport, resolving the contradiction between maintaining guidance precision and reducing transport space.
Solution Approach 2:
The physical state of the expansion strap changes between extended and rolled configurations. This parameter change allows the guide device to transition from a compact stored state to an extended operational state, maintaining guidance precision while minimizing transport volume.
2Adaptability or versatility
If a fixed-length coupling device is used, then structural simplicity is maintained, but adaptability to different cut types and contours deteriorates
Solution Approach 1:
The expansion strap provides dynamic length adjustment capability, allowing the coupling device to adapt to various cut types and contours. The strap can be extended or rolled to accommodate different working conditions while maintaining relatively simple structural components.
Solution Approach 2:
The coupling device is segmented into the expansion strap and the guide body, allowing independent optimization of each component. The strap handles length adaptation while the guide body maintains guidance function, achieving versatility without excessive overall complexity.
3Ease of operation
If tool-free detachable connection is used, then ease of operation is improved, but connection reliability may deteriorate
Solution Approach 1:
The coupling device uses a dynamic clamping mechanism that can be quickly engaged and disengaged without tools. The clamping body applies sufficient force to maintain reliable connection during operation while allowing easy release when needed, balancing ease of operation with connection reliability.
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 guide device provides flexibility in cut types and contours, is space-efficient during transport, and ensures precise guidance with adjustable and interchangeable components, improving the versatility and portability of hand-held power tools.
Implementation Method 1
A property of the expansion strap used according to the invention is that it has a certain flexural rigidity when it is pulled out or extended, i.e. when it creates a distance between the guide body and the hand-held power tool or the guide-connection arrangement arranged therein, so that the distance between the hand power tool and the guide body can be retained.
Data Source
AI summary
The invention relates to a guide device (50a-50c) for a hand-held machine tool (10) intended for machining a workpiece (40), comprising a guide body (60a-60c) for guiding along a guide base (46), a guide-connection arrangement (70a-70c) for connecting the guide body (60a-60c) to the hand-held machine tool (10), and at least one coupling device (52a-52c) for coupling the guide body (60a-60c). The guide-connection arrangement (70a-70c) includes a guide-connection arrangement (70a-70c) with a distance between the guide body (60a-60c) and the guide-connection arrangement (70a-70c), which is in particular adjustable. The invention further relates to a hand-held machine tool (10) equipped with such a guide device (50a-50c). The guide device (50a-50c) is provided that the coupling device (52a-52c) has at least one spreading band (53).