Rotatable Handle for Ergonomic Power Tool Guiding
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Solution Overview
Problem
Existing hand-held power tool guiding devices, such as drill stands, often have ergonomically unfavorable grip positions due to a rigid connection between the handle and adjusting lever, making it difficult for operators to maintain ergonomic control, especially when adjusting between different positions.
Innovation Solution
The handle is designed to be rotatable relative to the adjusting lever around an axis of rotation, allowing for ergonomic positioning and featuring a reset device, such as a leg spring, to return to a neutral position and prevent Bowden cable entanglement, with a locking mechanism for personal adaptation and a securing device for transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the handle is rigidly connected to the adjusting lever, then the structural stability is improved, but the ease of operation deteriorates due to ergonomically unfavorable grip positions
Solution Approach 1:
The handle is divided into two independent parts: a handle body that rotates around an axis, and a hand lever that remains fixed to the adjusting lever. This segmentation allows the handle body to be positioned ergonomically while maintaining structural connection to the adjusting lever through the hand lever, thus resolving the contradiction between structural stability and ease of operation.
Solution Approach 2:
The handle body is made rotatable around an axis relative to the adjusting lever, introducing dynamic adjustability. This allows the operator to rotate the handle body into an ergonomically favorable position while the hand lever maintains its functional connection to the adjusting lever, thereby improving ease of operation without compromising structural stability.
2Ease of operation
If the handle is made rotatable for ergonomic positioning, then the ease of operation is improved, but the device complexity increases due to additional rotation and locking mechanisms
Solution Approach 1:
The rotational adjustment function is extracted as a separate, simple mechanism independent of the main adjusting lever mechanism. The handle body rotates around a fixed axis with minimal additional components, and the locking function is achieved through a simple detent or friction-based mechanism, thus improving ease of operation while adding minimal device complexity.
Solution Approach 2:
The handle body is designed to be self-locking through friction or a simple detent mechanism that automatically maintains the rotated position without requiring additional active locking components. This self-service approach allows ergonomic positioning while minimizing the increase in device complexity.
3Reliability
If the handle is locked in a fixed position for transport, then the reliability is improved by preventing accidental actuation, but the adaptability deteriorates as the handle cannot be repositioned
Solution Approach 1:
The handle system is designed with dynamic characteristics, allowing it to be locked in multiple discrete positions around the rotation axis rather than a single fixed position. This enables the handle to be secured against accidental actuation during transport while still allowing the operator to rotate and lock it into different ergonomic positions when in use, thus maintaining both reliability and adaptability.
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
Enables ergonomic operation of the remote control device in all adjusting lever positions, improves user comfort, and prevents accidental actuation during transport by allowing the handle to be locked in a favorable position, enhancing operational efficiency and safety.
Implementation Method 1
the reset device, which prevents a Bowden cable, which transmits the movement of the remote control device to a device switch of the power tool, from getting wound on the hand lever or on the handle
Implementation Method 2
The axis element is lockable by a locking device on the adjusting lever and is rotatable around the axis of rotation when the locking device is opened
Data Source
AI summary
A hand-held power tool guiding device is disclosed. The device includes a receptacle element for receiving the power tool, a remote control device for operating the power tool, and a guiding and support device, which is designed to be adjustable with an adjusting lever. The adjusting lever has a handle which is configured to be rotatable relative to the adjusting lever around an axis of rotation.