Rotary Knob Parameter Control for Faster Kitchen Appliance Input
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Solution Overview
Problem
Existing electrical kitchen appliances require users to set processing parameters in a complex and error-prone manner, often relying on conventional rotary knobs that increase or decrease parameters based on direction, lacking simplicity and reliability.
Innovation Solution
The introduction of a rotary knob operating mode where parameter changes differ by direction, allowing for distinct value jumps when rotating in opposite directions, and a switching mechanism to toggle between increasing and decreasing modes, along with a touch display for easier operation and automatic parameter adjustment based on detected acceleration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional rotary knob is used to adjust parameters, then the device structure remains simple, but the operation becomes complex and error-prone
Solution Approach 1:
The rotary knob implements dynamic adjustment behavior where the adjustment step size changes based on the direction of rotation. Right rotation increases parameters in small increments (fine adjustment), while left rotation decreases parameters in large increments (coarse adjustment). This dynamic behavior allows the same physical component to provide different adjustment granularities based on operational context, improving ease of operation without adding mechanical complexity.
Solution Approach 2:
The system changes the parameter adjustment behavior based on the rotation direction. When the rotary knob is turned right, the parameter changes by a first amount per angle of rotation; when turned left, it changes by a second amount that is different from the first amount. This parameter change strategy enables adaptive control where the adjustment step size is modified according to the direction of user input, resolving the contradiction between simple structure and easy operation.
2Measurement precision
If the rotary knob adjusts parameters in small increments only, then precision is improved, but the time to reach target values increases
Solution Approach 1:
The system employs periodic action through alternating adjustment phases. During right rotation, the system performs fine adjustments in small increments to achieve precision. During left rotation, it performs coarse adjustments in large increments to quickly approach target values. This periodic switching between different adjustment granularities based on rotation direction allows the system to efficiently navigate from distant target values while maintaining the ability to achieve precise final settings.
Solution Approach 2:
The adjustment step size dynamically changes based on rotation direction. Right rotation triggers small increment adjustments for precision, while left rotation triggers large increment adjustments for speed. This dynamic adaptation of the adjustment parameter allows the system to optimize between precision and time consumption depending on the operational phase, resolving the contradiction between measurement precision and adjustment time.
3Adaptability or versatility
If the rotary knob supports both increase and decrease functions, then versatility is improved, but the operating mode becomes more complex
Solution Approach 1:
The system implements asymmetric adjustment behavior where right rotation and left rotation produce different effects. Right rotation consistently increases parameters with small increments, while left rotation consistently decreases parameters with large increments. This asymmetric design provides clear directional feedback to the user, making the dual-function operation intuitive and simple despite the versatility it enables. The asymmetry resolves the contradiction by making the complex dual-function operation feel natural through consistent directional associations.
Data Source
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AI summary
The invention relates to an electrical kitchen appliance for processing food by means of at least one processing function that can be set by a user, and a corresponding method. The electrical kitchen appliance (1) is provided with a setting device (6) for the user to set at least one parameter of the processing function, the setting device (6) being designed as a rotary knob. According to the invention, such an operating mode is provided in which the parameter is changed by a first amount per angle of rotation by turning the rotary knob in one direction and the parameter is changed by a second amount per angle of rotation by turning the rotary knob in the opposite direction, with the first amount is different from the second amount. This solves the problem of specifying such an electrical kitchen appliance with which the user can easily, quickly and reliably input a parameter of a processing function.