PCB Fixing Pin with Slot and Constraining Part for LCD Assembly
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Solution Overview
Problem
The existing structure for fixing a drive printed circuit board in a liquid crystal display is complex and not suitable for reworking when failures occur, requiring a simpler and more efficient method.
Innovation Solution
A pin with a slot and constraining parts is used to securely fix the printed circuit board within a plastic frame, eliminating the need for screws and allowing for easy assembly and disassembly without additional operational steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a wall and additional screw structure are used to fix the drive PCB in the plastic frame, then the fixing strength is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple functions into a single pin structure. The pin integrates fixing, grounding, and positioning functions that were previously separated into multiple components (wall structure, additional screws, grounding elements). This merging reduces the number of parts and simplifies the overall assembly while maintaining the required fixing strength and grounding capability.
Solution Approach 2:
The pin is designed as a multi-functional component that simultaneously provides mechanical fixation, electrical grounding, and positional alignment for the drive PCB. This universal component replaces the need for separate wall structures, screws, and grounding elements, thereby reducing device complexity while preserving all necessary functions.
2Reliability
If a wall and additional screw structure are used to fix the drive PCB in the plastic frame, then the fixing reliability is improved, but the ease of repair deteriorates
Solution Approach 1:
The fixing mechanism is segmented into a removable pin component that can be independently accessed and replaced. The pin is designed to be easily inserted and removed from the plastic frame, allowing technicians to quickly replace faulty drive PCBs without disassembling complex wall structures or dealing with multiple fasteners. This segmentation significantly improves ease of repair while maintaining reliable fixation during normal operation.
3Ease of manufacture
If a pin with slot and constraining parts is used to fix the printed circuit board, then the ease of manufacture is improved, but the device complexity increases
Solution Approach 1:
The pin is pre-formed with the slot and constraining parts integrated into its structure during manufacturing. The slot is pre-cut along the major axis, and the constraining parts are pre-positioned on the side surface, allowing the pin to be directly installed without additional assembly steps. This preliminary action during manufacturing simplifies the overall assembly process despite the increased complexity of the pin's internal structure.
Data Source
AI summary
The present invention discloses a liquid crystal display that includes a plastic frame, a printed circuit board, a pin, a slot, a first constraining part and a liquid crystal panel. The printed circuit board has at least one hole therein. The pin is disposed on the plastic frame. The slot is formed on the pin and extends along the major axis of the pin. The first constraining part is disposed on the side surface of the pin for constraining the printed circuit board between the first constraining part and the plastic frame. The liquid crystal panel is held by the plastic frame and electrically connected to the printed circuit board.