Filter Manifold Keyways and Cam Latches for Secure Cartridge Changes
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Solution Overview
Problem
Users face difficulties in correctly installing and removing water filters in appliances due to misalignment and lack of clear installation indicators, leading to potential improper installation and removal of water filters.
Innovation Solution
A mechanical interlock system for water filters, comprising a filter cartridge with an integrated locking head and a filter cartridge manifold, featuring a key and latching mechanism that ensures proper alignment and secure installation, and a twist-to-unlock mechanism for easy removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional filter installation system is used, then the filter can be installed and removed, but users face difficulties in correctly installing and removing water filters due to misalignment and lack of clear installation indicators
Solution Approach 1:
The filter cartridge incorporates an asymmetric key structure with specific geometric features (keyway, cam groove, protrusions) that only fit into the manifold in one correct orientation. This asymmetric design physically prevents misalignment and ensures proper installation orientation without requiring user judgment or alignment skills.
Solution Approach 2:
The mechanical interlock system acts as an intermediary between the filter cartridge and manifold, using the key-keyway engagement and cam-latch interaction to mediate the connection. This intermediary mechanism provides tactile and audible feedback to confirm proper installation, eliminating the need for visual alignment or user interpretation of installation status.
2Reliability
If a secure locking mechanism is implemented, then the filter installation is secure and aligned, but the filter removal becomes more difficult
Solution Approach 1:
The cam mechanism provides dynamic, direction-dependent engagement and disengagement. During installation, the cam rotates to engage the latch securely, creating a firm locked position. During removal, rotating the cam in the opposite direction automatically disengages the latch, allowing easy filter extraction. The same mechanical structure adapts its function based on the direction of applied force.
Solution Approach 2:
The removal process inverts the installation sequence by rotating the cam mechanism in the opposite direction. This inversion automatically triggers the disengagement of the latch and keyway alignment, reversing the secure engagement state achieved during installation and enabling simple filter removal without requiring force or complex操作步骤.
3Reliability
If a mechanical interlock system with multiple components is used, then proper alignment and secure installation are ensured, but the device complexity increases
Solution Approach 1:
The design merges multiple functions into integrated components: the filter cartridge head combines the key structure, cam mechanism, and sealing surface in one piece; the manifold integrates the keyway, latch, and fluid connection ports. This consolidation reduces the number of separate parts while maintaining the mechanical interlock's alignment and security functions.
Solution Approach 2:
The mechanical interlock components serve multiple functions simultaneously: the key structure provides both alignment guidance and locking engagement; the cam mechanism provides both secure latching during installation and easy release during removal; the protrusions and grooves provide both mechanical coupling and rotational positioning. This multi-functionality reduces the need for additional specialized components.
Data Source
AI summary
A mechanical interlock system for a fluid filter is described herein. The mechanical interlock system may include a filter cartridge and a filter cartridge manifold for receiving the filter cartridge. The filter cartridge may include a filter body, a fluid inlet and outlet, and an integrated locking head. The integrated locking head may include a key extending radially outward from the integrated locking head and channels on an outer surface of the integrated locking head. The filter cartridge manifold may include an insertion and extraction tube for receiving the key and latching mechanisms. The insertion and extraction tube may include a primary keyway and a secondary keyway. The key, keyways, latching mechanisms, and/or channels may interact to maintain alignment of the filter cartridge during insertion of the filter cartridge into an appliance including the filter cartridge manifold.