Flexible Shape-Memory Control Element for Handheld Power Tools
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Solution Overview
Problem
Handheld power tools often have inflexible operating units that limit their adaptability and operational reliability, and existing designs may require extensive modifications to accommodate different usage areas, leading to inefficiencies in space, manufacturing, and maintenance.
Innovation Solution
A handheld power tool device with a flexible shape-operating unit that includes a control element with significantly different shapes for on and off positions, integrated into the housing unit, allowing for ergonomic and space-efficient design, and featuring a detection unit for precise actuation detection, enhancing operational flexibility and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional rigid control elements are used, then the structure is simple and manufacturing is easy, but the adaptability to different usage areas is limited and space requirements increase
Solution Approach 1:
The control element is designed with shape memory alloy that can dynamically change its shape between elongated and rounded forms in response to temperature changes, allowing the same component to adapt to different operational requirements without requiring multiple fixed-geometry parts
Solution Approach 2:
The control element's geometric parameters (length, diameter, curvature) are changed through temperature-induced phase transformation of the shape memory alloy, enabling the element to transition between different functional states and accommodate various usage scenarios
2Adaptability or versatility
If multiple control elements are provided for different functions, then the operational versatility is improved, but the space requirements and device complexity increase
Solution Approach 1:
A single control element is designed to perform multiple functions by changing its shape between elongated and rounded forms, eliminating the need for separate control elements for different operations and thereby reducing the overall space required for the control unit
Solution Approach 2:
Multiple control functions that would traditionally require separate elements are merged into one shape-memory control element, which integrates different operational capabilities into a single component that can be actuated in different ways based on its shape state
3Ease of operation
If the control element is made flexible with shape memory alloy, then the ergonomic design and space efficiency are enhanced, but the manufacturing complexity and cost increase
Solution Approach 1:
The traditional mechanical control element requiring complex linkages and moving parts is replaced with a shape memory alloy element that uses thermomechanical properties to achieve shape changes, simplifying the overall mechanical structure and reducing the number of components
Solution Approach 2:
The control element utilizes shape memory alloy, a composite material with unique thermomechanical properties, which enables flexible shape changes while maintaining structural integrity, combining the benefits of flexibility with sufficient mechanical strength
4Reliability
If the control element has significantly different shapes for on and off positions, then the operational reliability is improved, but the detection precision requirements increase
Solution Approach 1:
The detection unit utilizes optical detection to identify the control element's shape state, with the elongated and rounded shapes providing distinct optical signatures that enable reliable differentiation between on and off positions
Solution Approach 2:
The detection unit provides feedback to the control system about the control element's current shape state, enabling the system to reliably determine whether the tool should be activated or deactivated based on the detected geometric configuration
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 solution improves operational reliability, reduces space requirements, enhances ergonomic design, and simplifies maintenance while maintaining robustness and cost-effectiveness, allowing the tool to be adapted for various applications without extensive redesign.
Implementation Method 1
The control element is designed with shape memory alloy and can assume significantly different shapes, in particular an elongated shape and a rounded shape
Data Source
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AI summary
The invention relates to a hand-held machine tool device having at least one control unit (10a-p). It is proposed that the control unit (10a-p) comprises at least one flexibly shaped operating element (12a-p; 14a, 14e-n; 16a-g, 16i, 16j, 16l-n, 16p; 18a, 18e-g, 18j, 18m, 18n).