Swing Arm Lock Mechanism for Tool-Less PCB Mounting
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Solution Overview
Problem
The process of assembling and replacing printed circuit boards (PCBs) in computer devices is time-consuming due to the need for tools to secure and remove them using traditional fastening mechanisms.
Innovation Solution
A swing arm lock mechanism that includes a main body, a hooked arm, and an aperture, allowing for tool-less operation by rotating about a central axis from an unlocked to a locked position, with dimples and a partially curved edge for alignment and constraining the PCB, and a fastener with a nut and screw for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thumb-type screw or tool-based fastening mechanism is used to secure the PCB, then the PCB can be firmly fixed to the bracket, but the assembly and replacement process becomes time-consuming
Solution Approach 1:
The patent employs a dynamic swing arm mechanism that can rotate between locked and unlocked positions. The swing arm is connected to the PCB assembly and can swing between a locked position (securing the PCB) and an unlocked position (releasing the PCB), enabling quick tool-less installation and removal while maintaining firm fixation when locked
Solution Approach 2:
The swing arm mechanism is designed to be operated manually without requiring external tools. The operator can directly manipulate the swing arm to engage or disengage the locking mechanism, making the system self-servicing and eliminating the time-consuming step of using screwdrivers or other fastening tools
2Reliability
If a tool-based fastening mechanism is used to secure the PCB, then the connection is secure, but the process of removing and installing PCB becomes complex and time-consuming
Solution Approach 1:
The swing arm provides a dynamic, movable connection system that transitions between locked and unlocked states through simple manual manipulation. This dynamic mechanism maintains secure connection when locked but allows easy tool-less removal when unlocked, significantly improving ease of operation compared to static screw-based systems
Solution Approach 2:
The mechanism allows direct manual operation without requiring external tools. The swing arm can be manually swung into or out of the locked position, enabling the operator to install or remove the PCB independently without needing screwdrivers or other fastening tools, thereby simplifying the operation process
3Reliability
If traditional fastening mechanisms are used, then the PCB can be securely attached, but the overall assembly process loses time due to tool requirements
Solution Approach 1:
The dynamic swing arm mechanism enables rapid transition between attached and detached states. By swinging the arm into the locked position, the PCB is quickly secured without requiring multiple fastening operations, thereby improving assembly efficiency while maintaining secure attachment
Solution Approach 2:
The tool-less manual operation of the swing arm mechanism eliminates the time required to use fastening tools. The operator can directly engage or disengage the locking mechanism by manually moving the swing arm, significantly reducing assembly time and improving productivity compared to traditional tool-based methods
Data Source
AI summary
A swing arm lock mechanism for securing a printed circuit board to a bracket includes a main body, a hooked arm, and an aperture in the main body. The hooked arm extends from and is integral with the main body. The hooked arm and main body define an open-ended slot for engaging a lock pin disposed on the bracket. The aperture receives a fastener for securing the main body to the printed circuit board such that the main body and hooked arm can rotate about a central axis of the fastener from a first unlocked position to a second locked position.