Sliding Device Flex Alignment for PCB Assembly Reliability
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Solution Overview
Problem
Portable slidable electronic devices face challenges in electrically coupling the display in the sliding portion to a printed circuit board (PCB) during assembly, as conventional flex connectors are prone to misalignment and damage due to the cycling motion between open and closed positions.
Innovation Solution
Securing the flex connector to a subassembly, such as a slidable base plate, before assembling the sliding and base portions, allowing for proper alignment and protection of the dynamic region, and using a guide base that slides with the sliding portion to maintain the flex connector's position and facilitate connection to the PCB.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional flex connectors are used to electrically couple the display to the PCB during assembly, then electrical connection is achieved, but the flex connectors are prone to misalignment and damage due to cycling motion between open and closed positions
Solution Approach 1:
The flex connector is pre-aligned and secured to the sliding portion before the sliding portion is assembled to the base portion. This preliminary action ensures proper positioning of the flex connector's dynamic region, preventing misalignment and damage that would occur during subsequent assembly steps with conventional methods.
2Reliability
If the flex connector is secured early in assembly to allow proper alignment, then misalignment and damage are reduced, but additional assembly steps and complexity are introduced
Solution Approach 1:
The method combines multiple functions into integrated components: the guide base is formed as part of the sliding portion, and the alignment features are integrated into the housing structures. This merging reduces the number of separate alignment operations needed, simplifying the overall assembly process while maintaining reliable flex connector positioning.
3Ease of operation
If the dynamic region of the flex connector is exposed during assembly, then connection to PCB is facilitated, but the delicate dynamic region is prone to damage
Solution Approach 1:
The method provides protective positioning of the dynamic region through the guide base and alignment features before the assembly process begins. The guide base confines the dynamic region within a protected pathway, and the alignment features ensure the flex connector is positioned in a damage-free zone during subsequent assembly operations, cushioning against potential harm in advance.
Data Source
AI summary
According to one aspect, a portable electronic device that includes a base portion and a sliding portion. The sliding portion is adapted to be coupled to the base portion and slideable relative thereto between a closed position and an open position. The device also includes a flex connector coupled to the sliding portion, the flex connector having a connector end, a dynamic region, and an intermediate coupler between the connector end and the dynamic region. The device also includes a guide base slidably coupled to the sliding portion, the guide base being adapted to be mechanically coupled to the intermediate coupler so as to secure the flex connector to the guide base before the sliding portion is coupled to the base portion.