Ring-Shaped Oven Control Knob for Compact Precise Rotation
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Solution Overview
Problem
Existing domestic appliance control devices with movable operating elements and electronic display panels face challenges in achieving a compact, user-friendly, and smooth-running design, often resulting in large and clumsy configurations that require significant space and are difficult to operate precisely.
Innovation Solution
A domestic appliance with a ring-shaped operating element having an inwardly inclined upper side, integrated with a sliding ring and magnets for precise rotation, allowing for compact design and easy user interaction, while the sliding ring and metal spider facilitate smooth operation and position detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional cylindrical control knobs are used, then the operating element can be gripped on its outer side, but the device requires large space and is difficult to operate precisely
Solution Approach 1:
The control knob is divided into two functional parts: a stationary cylindrical body that provides structural support and magnetic coupling, and a separate rotatable front part with inclined upper side that provides the user interface. This segmentation allows the front part to be optimized for precise rotation while the overall structure remains compact.
Solution Approach 2:
The front part is given an inclined upper side that slopes downward toward the edge, creating a funnel-like shape. This dimensional change from a flat top to an inclined surface provides better finger engagement and rotational control without increasing the horizontal footprint of the device.
2Measurement precision
If the operating element is made with a large diameter for precise positioning, then rotational position can be set accurately, but the device becomes clumsy and requires more space
Solution Approach 1:
The inclined upper side of the front part creates a local geometric feature that concentrates rotational control at the edge where the finger applies force. This localized quality improvement allows precise control with a smaller overall diameter, as the critical interaction between finger and control element is optimized at the contact point rather than requiring a large surface area.
3Ease of operation
If the front part has a flat top surface, then the structure is simple, but finger contact and rotational control are poor
Solution Approach 1:
The front part features an inclined upper side that curves downward toward the edge, creating a smooth, continuous surface that guides finger placement and rotation. This curved geometry provides intuitive tactile feedback and improved grip without requiring complex mechanical structures, achieving enhanced operability through elegant geometric form.
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 enables a compact, user-friendly, and precise control mechanism that saves space, reduces mechanical force required for operation, and allows for accurate setting of operating conditions, enhancing user experience and operational efficiency.
Implementation Method 1
Provision is preferably made for the operating element designed as a ring to have magnets, with the interaction of the magnets with fixed metal elements, in particular a ring-shaped metal spider, depending on a relative movement of the ring, in particular the ring-shaped front part, to the metal elements being able to detect an associated operating setting of the domestic appliance
Implementation Method 2
The sliding ring is made of a specific material that favors the mobility of the ring-shaped front part with the least possible friction
Data Source
Figure 1~4
AI summary
The invention relates to an operator control apparatus for a domestic appliance (1), having an electronic display panel (11) and an operator control element (13) which can be moved relative to the display panel (11) in order to adjust operating conditions of the domestic appliance (1), wherein the operator control element (13) has an annular front part (17) which has an upper face (18) which is inwardly inclined. The invention also relates to a baking oven (1) having an operator control apparatus (10).