Snap-Fit Filter Assembly with Segmented Racks for Quick Disassembly
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Solution Overview
Problem
Existing air filtration devices with folded filter elements are cumbersome to disassemble and reassemble, requiring sequential removal and alignment of snap-in parts, which is time-consuming and labor-intensive, and often rely on inconvenient rotary switches for cover connection.
Innovation Solution
A filtering device with a snap-fit assembly connecting the screen cover and base, featuring long racks and snap-in teeth for easy alignment and disassembly of the folded filter element, which is fixed by a rubber strip, eliminating the need for additional connecting members and ensuring air tightness through a reusable frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If snap-in connection is used to fix the filter element between the lower cover and upper cover, then the filter element can be securely fixed, but the disassembly and assembly process becomes time-consuming and laborious
Solution Approach 1:
The snap-in connection is divided into two independent parts: one part is integrated with the filter element and the other part is integrated with the plastic filter screen. This segmentation allows the filter element to be quickly detached from the screen without requiring sequential removal of multiple components, significantly reducing disassembly time while maintaining secure fixation during operation.
Solution Approach 2:
The snap-in parts are pre-configured with alignment features and engagement geometries that guide the assembly process. The protrusions and grooves are designed to automatically align when components are brought together, eliminating the need for manual alignment and reducing both assembly time and complexity.
2Manufacturing precision
If sequential alignment of snap-in parts is required for filter element installation, then proper positioning can be achieved, but the operation becomes cumbersome and time-consuming
Solution Approach 1:
The snap-in connection uses asymmetric protrusion and groove geometries that provide inherent alignment guidance. The asymmetric design ensures that components can only be assembled in the correct orientation, achieving precise positioning automatically without requiring manual alignment efforts from the user.
Solution Approach 2:
The alignment features are designed to self-align the filter element with the plastic filter screen during assembly. The protrusions fit into the grooves automatically when components are brought together, allowing the structure to guide its own positioning without external intervention, thereby simplifying the installation process while ensuring accurate placement.
Data Source
AI summary
Disclosed is a filtering device. The device includes a main body part and a filter element assembly, where the main body part has a mounting cavity for accommodating the filter element assembly, further includes a base and a screen cover arranged as a cover of the base, and at least one rack for fixing the filter element assembly is disposed on an inner wall of the screen cover and/or the base; and the filter element assembly includes a folded filter element arranged in a folded shape, and a rubber strip arranged on the folded filter element for maintaining the shape of the folded filter element to facilitate quick assembly and disassembly of the folded filter element. Further, the screen cover and the base are connected through various snap-fit assemblies, without requiring additional connecting members for fixing them, which is convenient for disassembly and assembly, and has a simple structure.