Handheld Mixer Switch Latching for Tool-Dependent Operation Mode
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Solution Overview
Problem
Existing hand-held electric food processing devices are complex and prone to unintentional operation due to lack of detents or spring preload, leading to unsafe short-term operation when sharp-edged tools are used, and inadequate protection against contamination when not in use.
Innovation Solution
A latching mechanism for the actuating element of the switch engages or disengages based on the type of tool coupled, allowing for short-term or continuous operation, with a spring preload ensuring the switch is automatically turned off when not actuated, and adjustable slide parts to secure housing openings, preventing contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a latching mechanism with detents is added to prevent unintentional operation, then reliability improves, but device complexity increases
Solution Approach 1:
The actuating element automatically engages or disengages the latching means based on the tool type inserted, without requiring user intervention. The system self-regulates the switching mode (continuous or short-term) based on the detected tool characteristics.
Solution Approach 2:
A detection mechanism serves as an intermediary between the inserted tool and the latching means, translating tool characteristics into appropriate latching states. This mediator automatically determines whether continuous or short-term operation should be enabled.
2Ease of operation
If the switch remains in continuous operation position, then ease of operation improves, but safety deteriorates when sharp-edged tools are used
Solution Approach 1:
The system provides automatic feedback based on the inserted tool type, enabling continuous operation only when safe tools are detected. The feedback loop monitors tool characteristics and adjusts the switching mode accordingly, preventing unsafe continuous operation with sharp-edged tools.
Solution Approach 2:
The switching mode is dynamically adjusted based on the inserted tool. The actuating element can transition between enabling continuous operation and short-term operation only, depending on the tool type detected, making the system adaptive rather than static.
3Ease of operation
If housing openings remain open for tool coupling, then ease of operation improves, but contamination risk increases
Solution Approach 1:
The housing openings dynamically transition between open and closed states based on tool insertion. When tools are coupled, openings remain accessible; when tools are removed, openings automatically close to prevent contamination.
Solution Approach 2:
The housing openings are preliminarily positioned in a closed state and automatically open when tools are inserted. This preliminary closing prevents contamination before tool insertion occurs.
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 simplifies operation by ensuring safe short-term operation with sharp-edged tools and secure continuous operation with non-sharp tools, while maintaining device cleanliness by automatically closing unused tool openings.
Implementation Method 1
the actuating element is acted upon by a spring preload which tends to move the actuating element into the open position of the switch
Implementation Method 2
a latching means of the actuating element of the switch either engages with a counter-latching means or not, depending on the type of tool coupled
Data Source
AI summary
The electric stirrer has an actuating element (6) which is rocker tiltable around a swiveling axis. Locking means of the rocker as a function of kind of the coupled working tool engaged with the counter-locking means (14) for the continuous operation or does not engaged for the short-time operation.