Computer Chassis Flap Locking Mechanism Against Pressure Opening
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Solution Overview
Problem
Computer chassis flaps often fail to remain closed upon withdrawal of sleds due to air pressure differentials, leading to unwanted airflow in or out of the chassis.
Innovation Solution
A lock mechanism comprising a gear wheel, gear rack body, push rod latch, and push rod body, with a spring connecting the push rod latch and body, that translates within the slot to maintain the flap in a closed position by abutting the gear rack projection and preventing the gear wheel from rotating, ensuring the flap remains closed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the flap is allowed to move freely based on air pressure differential, then the flap can automatically open when needed, but the flap cannot remain closed reliably upon sled withdrawal
Solution Approach 1:
The lock mechanism is activated in advance when the sled is inserted into the slot. The sled latch engages the cutout of the push rod body before the sled is fully inserted, pre-positioning the locking mechanism to ensure the flap remains closed during sled withdrawal, preventing the reliability issue of premature flap opening
Solution Approach 2:
The lock mechanism applies a counteracting force to the air pressure differential that would otherwise force the flap open. The gear rack body abuts against the gear wheel to prevent rotation, creating a mechanical counter-force that opposes the air pressure differential and maintains the flap in the closed position during sled withdrawal
2Reliability
If a lock mechanism is added to maintain flap closed position, then flap stability improves, but device complexity increases
Solution Approach 1:
The lock mechanism components are merged with existing chassis structures. The gear rack body is integrated into the chassis slot, the push rod latch is combined with the sled latch mechanism, and the spring is integrated into the push rod assembly. This merging approach reduces the number of separate parts and simplifies manufacturing while maintaining reliability
Solution Approach 2:
The gear rack body serves multiple functions: it acts as a structural support element, a guide for the push rod latch, and a locking mechanism component that engages with the gear wheel. The push rod latch simultaneously functions as part of the sled latching system and the flap locking system, reducing overall device complexity through multi-functionality
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
Effectively prevents airflow through the slot by maintaining the flap in a closed position during sled withdrawal, addressing the issue of air pressure differential-induced flap opening.
Implementation Method 1
The lock mechanism includes a spring connected to the push rod latch and the push rod body. A first end of the spring is connected to the push rod body and a second end of the spring is connected to the push rod latch.
Data Source
AI summary
A lock mechanism within a slot of a computer chassis is disclosed. The lock mechanism includes a gear wheel, a gear rack body, a push rod latch, a push rod body, and a chassis latch. The gear wheel, the gear rack body, the push rod latch, the push rod body, and the chassis latch cooperate to restrict a flap in the slot from opening when the flap is in the closed position, and the chassis latch is engaged with a cutout on the push rod body.