PCB Clamping Mechanism for Display Backlight Fixation
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Solution Overview
Problem
Current methods for fixing a Printed Circuit Board (PCB) on a back-light module, such as using screw locks or adhesive tapes, are either inconvenient or fail to provide reliable fixation in high-temperature or high-humidity environments.
Innovation Solution
A fixing member with a supporting plate and clamping parts forming U-shape grooves that clamp the PCB, providing a secure and convenient mounting solution that is less affected by environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If screw locks are used to fix the PCB, then the fixation strength is improved, but the mounting convenience deteriorates due to the need to tighten screws
Solution Approach 1:
The patent replaces the traditional screw-locking mechanical system with a snap-fit mechanical system. The fixing member includes a clamping structure that elastically deforms to snap onto the PCB, eliminating the need for screw tightening operations while maintaining secure fixation. This substitution transforms a multi-step mechanical assembly process into a single-step snap-fit operation.
Solution Approach 2:
The patent changes the mechanical parameters of the fixation system by using elastic deformation of the clamping structure. The clamping portion is designed with elastic properties that allow it to deform during installation and then maintain a constant clamping force on the PCB, replacing the need for adjustable screw tension with a self-regulating elastic parameter.
2Ease of operation
If adhesive tapes are used to fix the PCB, then the mounting convenience is improved, but the fixation reliability deteriorates in high-temperature or high-humidity environments
Solution Approach 1:
The patent replaces the chemical adhesion mechanism of adhesive tapes with a mechanical snap-fit system. The elastic clamping structure provides physical retention through geometric interlocking and elastic force, which is not affected by environmental conditions that degrade adhesive properties such as high temperature or humidity.
Solution Approach 2:
The patent avoids using adhesive tapes that have limited service life in harsh environments by employing a durable mechanical fixing member made from elastic materials that can repeatedly deform and maintain their fixation capability over time, even in high-temperature or high-humidity conditions.
3Device complexity
If a simple fixing structure is used, then the device complexity is reduced, but the fixation stability deteriorates
Solution Approach 1:
The fixing member is segmented into distinct functional portions: a supporting plate for structural base, and a clamping structure with clamping portions for securing the PCB. This segmentation allows each part to be optimized for its specific function while maintaining overall structural simplicity and fixation stability.
Solution Approach 2:
The patent introduces dynamic elasticity into the fixing structure through the clamping portions, which can elastically deform during installation and then maintain stable clamping force. This dynamic property allows the structure to adapt to slight variations in PCB positioning while ensuring stable fixation, without requiring complex adjustment mechanisms.
Data Source
AI summary
A fixing member, a device for mounting a circuit board, and a display apparatus so as to conveniently and firmly fix a PCB on the back plate of the back-light module are disclosed. The fixing member includes a supporting plate, a first clamping part fixedly arranged on an upper surface of the supporting plate, and a second clamping part facing the first clamping part. The first clamping part and the supporting plate form a first U-shape clamping groove. The second clamping part and the supporting plate form a second U-shape clamping groove. An opening of the first U-shape clamping groove faces an opening of the second U-shape clamping groove. The fixing member is used for fixing the circuit board on the back plate.