Rotary Switch Panel with Locking Ring for Compact Depth
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Solution Overview
Problem
Existing rotary switches for household appliances are complex, expensive, and have a large overall depth, making them difficult to adapt to specific needs and manufacture inexpensively.
Innovation Solution
A rotary switch design featuring a locking ring with detent elements and a rotating element, where the locking ring is securely positioned on the panel using molded sections and counter-shaped sections, allowing for easy customization and reduced component count, enabling a compact and cost-effective construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional rotary switch is used, then the latching function is achieved, but the structure becomes complex and the manufacturing cost increases
Solution Approach 1:
The rotary switch is divided into separate functional components: a rotatable element for user operation, a locking ring with detents for latching positions, and a panel with recesses for positioning. This segmentation allows each component to be optimized independently and simplifies manufacturing while maintaining the latching function.
Solution Approach 2:
The locking mechanism is extracted as a separate locking ring component that can be independently manufactured and assembled. The detents are integrated into the locking ring rather than the main rotary mechanism, simplifying the overall structure while preserving the latching function.
2Reliability
If a conventional rotary switch is used, then the latching function is achieved, but the manufacturing cost increases
Solution Approach 1:
The locking ring and detents are designed as simple, inexpensive components that can be manufactured using cost-effective processes such as injection molding for plastic parts or stamping for metal parts. The simplicity of the design allows for high-volume production at low cost while maintaining reliable latching functionality.
3Reliability
If a conventional rotary switch is used, then the latching function is achieved, but the overall depth becomes large
Solution Approach 1:
The locking ring is positioned within a recess in the panel, and the detents are arranged radially within the locking ring's structure. The rotatable element engages with the locking ring in a nested arrangement, allowing the entire latching mechanism to fit within a compact depth while maintaining full functionality.
4Reliability
If a conventional rotary switch is used, then the latching positions are fixed, but the adaptability to specific needs decreases
Solution Approach 1:
The locking ring can be designed with different numbers and arrangements of detents to create various latching position configurations. The modular design allows the locking ring to be replaced or reconfigured to adapt to different application requirements while maintaining reliable latching at the specified positions.
Solution Approach 2:
The basic rotary switch structure with rotatable element and locking ring serves multiple functions: it provides latching positions through detents, allows for different configurations by changing the locking ring design, and can be adapted to various applications by modifying the number and angular positions of the detents.
Data Source
Figure 1~2
Figure 3
Figure 4~6
AI summary
Panel (10) for a domestic appliance (12) having a rotary switch (14), the rotary switch (14) having a rotary element (18), a latching ring (26), at least one latching element (28) and a rotation axis (24) about which the rotary element (18) rotates relative to the latching ring (26), wherein the latching ring (26) has at least one latching lug (30) on its inner face (34), the said latching lug projecting radially toward the centre (32) of the latching ring (26), wherein the latching element (28) is held on the rotary element (18) and is prestressed radially outwards against the inner face of the latching ring (26), wherein the rotary element (18) and the latching ring (26) are arranged along the rotation axis, and wherein the latching ring (26) is arranged on the panel (10) in a rotationally fixed manner. A corresponding domestic appliance (12) having a panel (10) is also described.