Rack Chassis Lever Locking With Integrated Mounting Ear
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Solution Overview
Problem
Rack-mount computing devices often have bulky lever systems that occupy space and reduce the number of electronic devices that can be placed on or in the chassis, necessitating a more efficient locking mechanism.
Innovation Solution
A computing device with a chassis, mounting ear, lever, and locking unit, where the lever is rotatably coupled to the mounting ear and transitions between positions to engage or disengage the rack, and the locking unit automatically locks or unlocks in response to user force, allowing easy insertion and removal from the rack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional lever system is used to lock the chassis in the rack, then the chassis can be securely locked and easily removed, but the lever system occupies space within and in front of the chassis, reducing the capacity for electronic devices
Solution Approach 1:
The locking unit is integrated into the mounting ear structure, merging the locking function with the existing mounting components. The locking pin is disposed within the mounting ear, combining multiple functions into a single integrated structure that reduces overall space occupation while maintaining locking capability
Solution Approach 2:
The locking pin is nested within the mounting ear structure, with the locking unit housed inside the mounting ear's internal cavity. This nesting arrangement allows the locking mechanism to occupy minimal external space while remaining fully functional, directly addressing the space constraint issue
2Reliability
If a locking unit is added to secure the lever in the rack, then the chassis can be prevented from unintended removal, but the device complexity increases
Solution Approach 1:
The locking unit features automatic locking and unlocking functionality through spring-loaded mechanisms. When the lever is inserted into the rack, the locking pin automatically engages with the rack's locking hole without requiring additional user actions. Similarly, when the lever is removed, the locking pin automatically retracts, providing self-service locking that enhances reliability without adding operational complexity
Solution Approach 2:
The mounting ear structure serves multiple functions: it provides mechanical support for the lever, houses the locking unit, and integrates the locking pin mechanism. This multi-functionality reduces the need for separate components, thereby enhancing security while minimizing the increase in device complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a compact and efficient locking mechanism that allows easy insertion and removal of computing devices from racks while minimizing space usage and maintaining secure attachment.
Implementation Method 1
The torsion spring includes a first leg contacting the mounting ear and a second leg contacting the lever. In the first position, the lever presses the second leg toward the first leg to compress the torsion spring.
Implementation Method 2
The locking pin is movable within the mounting ear between a locked position and an unlocked position. A spring is positioned about the locking pin and biases the locking pin toward the locked position.
Data Source
AI summary
A computing device include a chassis, a mounting ear, a lever, and a locking unit. The chassis holds one or more electronic devices and is insertable into a rack, such as a server rack. The mounting ear is coupled to the chassis. The lever is rotatably coupled to the mounting ear and is rotatable between a first position and a second position. In the first position, the lever engages the rack to prevent the chassis from being removed. In the second position, the lever disengages the rack and allows the chassis to be removed. The locking unit is coupled to the mounting ear and transitions between locked and unlocked states. In the locked state, the locking unit secures the lever in the first position. In the unlocked state, the lever is movable from the first position to the second position.