Washing Machine Knob Assembly With Snap-Fit Cover Coupling
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Solution Overview
Problem
The existing knob assemblies in washing machines have a complex structure leading to low assembly efficiency and high component costs, with a decreasing connecting strength over time, making them prone to deformation and requiring frequent maintenance.
Innovation Solution
A simplified knob assembly design featuring a rotation knob with inclined coupling portions and a knob cover with corresponding guide grooves and ribs, allowing for easy assembly and enhanced coupling strength through a snap-fit connection mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a complicated assembly structure is used for the knob assembly, then the connecting strength and structural stability are improved, but the assembly efficiency decreases and component cost increases
Solution Approach 1:
The patent merges multiple components (rotation knob, cover member, and coupling structure) into an integrated assembly where the coupling portions are formed as integral parts of the rotation knob itself. This reduces the number of separate parts while maintaining strong connecting strength through the unified structure.
Solution Approach 2:
The rotation knob is segmented into multiple coupling portions distributed around its circumference, each capable of engaging with corresponding grooves in the cover member. This segmentation provides multiple connection points that collectively enhance overall connecting strength without requiring a complex single-piece design.
2Stability of the object's composition
If a complicated assembly structure is used for the knob assembly, then the structural stability is improved, but the assembly efficiency decreases
Solution Approach 1:
The coupling portions are pre-formed as integral features of the rotation knob during manufacturing, eliminating the need for separate assembly steps to create the coupling structure. This preliminary formation maintains structural stability while significantly improving assembly efficiency by reducing the number of manufacturing and assembly operations required.
3Strength
If a complicated assembly structure is used for the knob assembly, then the connecting strength is improved, but the component cost increases
Solution Approach 1:
By combining the coupling structure with the rotation knob as an integral feature rather than a separate component, the patent reduces the total number of parts that need to be manufactured, stored, and assembled. This merging reduces component costs while maintaining connecting strength through the unified design.
Data Source
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AI summary
A washing machine (1) comprising a knob assembly (100) having a simple structure allowing an easy assembly is provided. The washing machine (1) includes a cabinet (10), a control panel assembly (40) disposed at an upper portion of a front side of the cabinet (10), and a knob assembly (100) rotatably mounted on the control panel assembly (40) to set a washing cycle, wherein the knob assembly (100) includes a rotation knob (200) configured to rotate while connected to the control panel assembly (40) to set the washing cycle or a function according to a degree of rotation, and a knob cover (300) coupled to the rotation knob (200) to surround the rotation knob.