Flexible Board Rigid Board Assembly Locking Gap
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Solution Overview
Problem
Conventional methods for attaching flexible printed circuits (FPCs) to printed circuit boards (PCBs) are inefficient, as they do not provide a secure connection, leading to complex assembly processes and reduced work efficiency due to the lack of a robust attachment mechanism.
Innovation Solution
The integration of a sub-board with increased hardness, which is inserted into a locking gap on the PCB and has preventing arms that secure the flexible board in place, allowing for tool-free assembly by resisting and locating the FPC within the locking gap, thereby enhancing the attachment strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the FPC is attached to the PCB through SMT or connector, then the assembly process can be completed, but the attachment is not tight and electrical transmission is influenced
Solution Approach 1:
The invention divides the attachment function into multiple components: the FPC with its base portion, the sub-board with standing portion, and the rigid board with locking gap. Each component has a specific function, and together they achieve tight attachment without complex assembly processes.
Solution Approach 2:
The sub-board is inserted into the locking gap of the rigid board, and the FPC is attached to the sub-board. This nested structure allows the FPC to be firmly accommodated within the rigid board through multiple levels of insertion and engagement.
2Productivity
If conventional FPC assembly methods are used, then the FPC can be connected to electronic equipment, but particular tools must be taken away and working processes become complex
Solution Approach 1:
The locking gap structure and preventing arms enable the FPC to be attached to the rigid board through self-alignment and self-securing mechanisms. The base portion and standing portion automatically locate and hold the FPC in place without requiring external tools or complex procedures.
3Weight of moving object
If the FPC is made lighter and thinner, then the electronic products become lighter and thinner, but the attachment strength to PCB is reduced
Solution Approach 1:
The invention creates a composite attachment structure combining the FPC material, sub-board material, and rigid board material. This composite structure provides enhanced attachment strength while maintaining the FPC's lightweight and thin characteristics, as each material contributes its specific properties to the overall assembly.
Data Source
AI summary
An assembly structure of flexible board and rigid board includes a rigid board, a sub-board and a flexible board. The rigid board defines a locking gap having two side surfaces projecting toward each other to form two resisting portions. The sub-board has a standing portion inserted in the locking gap. Bilateral sides of the standing portion extend outward to form two preventing arms against a bottom surface of the rigid board. The flexible board has a base portion inserted in the locking gap of the rigid board. The base portion has a front surface and a back surface located to a front surface of the sub-board. The front surface of the base portion is against the resisting portions.