Rack-Mounted Air Filter Bezel Latch for Tool-Free High Airflow
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Solution Overview
Problem
The heavy steel bezel and air filter assembly in electrical equipment racks and cabinets poses challenges in mounting and dismounting without tools, compromising airflow, usability, and shock resistance, while existing solutions like screws and bolts reduce airflow and require tool usage.
Innovation Solution
A mount utilizing the rack flange or EIA rail to lock, retain, and support the bezel/air filter assembly, featuring a first plate with a rotating latch and a second plate that slides to pivot the latch, allowing tool-free mounting and dismounting by leveraging unused spatial area for thermal improvement and shock resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If screws and bolts are used to mount the heavy bezel and air filter assembly, then the mounting strength and shock resistance are improved, but the thermal inflow area is reduced and tool-free operation is compromised
Solution Approach 1:
The patent replaces the traditional screw/bolt mechanical fastening system with a spring-loaded cam locking mechanism. The cam lever (component 42) engages with a slot (component 48) to create a mechanical lock that provides strong mounting capability while allowing tool-free operation through manual lever manipulation. This substitution maintains mounting strength while eliminating the need for tools.
Solution Approach 2:
The spring-loaded cam mechanism enables the mounting system to automatically engage and lock when the lever is moved to the locked position. The spring (component 44) provides continuous force to maintain engagement, and the detent mechanism (components 36, 38) automatically secures the lever in the locked position without requiring tools or additional fastening operations.
2Strength
If screws and bolts are used to mount the bezel and air filter assembly, then the mounting strength is improved, but the thermal inflow area is reduced
Solution Approach 1:
The patent relocates the mounting mechanism from the frontal area (where screws/bolts would block thermal inflow) to the rear flange area of the rack. The cam locking mechanism is positioned on the backside of the bezel assembly, allowing the entire frontal surface to remain open for thermal inflow while the locking function is performed in a different spatial dimension (the rear mounting plane).
Solution Approach 2:
The patent introduces a mounting bracket or flange structure that acts as an intermediary between the bezel assembly and the rack. This intermediary component provides the mounting surface for the cam mechanism on the rear flange area, allowing the bezel to be securely mounted without any fasteners protruding into the thermal inflow path at the front.
3Reliability
If the bezel and air filter assembly is mounted to withstand shipping and seismic shock, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The patent employs a dynamic spring-loaded cam mechanism that can absorb and respond to shock forces. The spring (component 44) provides compliance to accommodate shipping and seismic shocks, allowing the mounting system to dynamically adjust to external forces rather than relying solely on rigid mechanical connections. This dynamic response maintains reliability while keeping the mechanism relatively simple.
Solution Approach 2:
The spring-loaded cam mechanism is designed with built-in shock absorption capability through the spring element that is pre-loaded to accommodate expected shipping and seismic forces. The detent mechanism (components 36, 38) is positioned to engage at predetermined positions that provide shock resistance before extreme forces are applied, cushioning the system against anticipated environmental stresses.
Data Source
AI summary
A mount for a bezel/air filter assembly for use in mounting the bezel/air filter assembly directly to the rack or cabinet in which electrical equipment is mounted or contained. The mount is affixed to the rack or cabinet rather than to the electrical equipment mounted or contained in the rack or cabinet, making use of the normally unused frontal area along the rail forming the front of the rack or cabinet, maximizing air flow to the equipment mounted in the rack or contained in the cabinet and allowing greater packaging density. Also, by using the rack or cabinet (rather than the equipment) as a support element, the mount is substantially stronger than if the mount was affixed to the chassis.