Backlight Module Hook Fixing Structure for Circuit Board
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Solution Overview
Problem
Conventional screw-based fixation methods for printed circuit boards in backlight modules are inefficient, leading to inconsistent force distribution, increased manufacturing costs, and reduced product quality due to the likelihood of missed screws and difficulty in achieving a smooth, flat attachment.
Innovation Solution
A fixing structure utilizing hooks on a back plate that match openings on the circuit board, allowing the hooks to press against the board's upper surface and contact its lower surface, ensuring stable and uniform attachment without the need for screws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screws are used to fix the printed circuit board to the back plate, then the board can be attached, but the assembly process becomes complex and time-consuming with risk of misalignment and inconsistent force distribution
Solution Approach 1:
The patent removes screws and screw holes from the fixing structure, extracting the problematic elements that caused misalignment and complexity. Instead, simple openings are provided in the circuit board that align with hooks on the back plate, eliminating the need for threaded fasteners and their associated alignment issues.
Solution Approach 2:
Rather than inserting screws into holes from one side, the patent inverts the approach by having hooks on the back plate engage with openings and press against the circuit board from the rear. This reversal of the fastening direction eliminates the need for precise hole alignment and screw insertion procedures.
2Strength
If multiple screws are used to fix the circuit board, then attachment is achieved, but manufacturing cost and assembly time increase
Solution Approach 1:
The circuit board's own structure (the openings) serves the dual function of both positioning and securing the board to the back plate. The openings are specifically designed to receive and engage with the hooks, making the circuit board itself part of the fixing mechanism rather than requiring separate fastening components.
Solution Approach 2:
The patent combines the positioning and fastening functions into a single integrated system where the openings and hooks work together as one fixing mechanism. This merging eliminates the need for separate alignment and fastening steps that would be required with traditional screw-based approaches.
3Manufacturing precision
If screws are used to attach the circuit board, then fixation is achieved, but the board cannot be ensured to be perfectly flat and smooth against the back plate
Solution Approach 1:
The openings in the circuit board are pre-positioned and pre-aligned during board manufacturing to precisely match the hook locations on the back plate. This preliminary positioning ensures that when the board is attached, it automatically achieves the correct flat alignment without requiring complex adjustment procedures during assembly.
Data Source
AI summary
A fixing structure and a backlight module using the same are provided. The fixing structure is used for fixing a circuit board. The circuit board with several openings has an upper surface and a lower surface. The fixing structure includes a back plate and several hooks. The back plate has a contact surface. These hooks are disposed on the contact surface. The hooks go through the openings so that the contact surface contacts the lower surface. The hooks move toward the walls of the openings and press against the upper surface so as to fix the circuit board onto the back plate.