Micro Plug Connector Circuit Board Fixation via Outer Casing Slots
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Solution Overview
Problem
Conventional micro USB plug connectors with integrated circuit boards lack a fastening mechanism, causing them to loosen and detach from the shell due to external pressure from wires in transmission or power cables during repetitive plugging and pulling.
Innovation Solution
A micro plug connector design featuring an insulative housing, outer casing with vertical positioning slots and stop portions that securely hold the circuit board in place, preventing disassembly from cable pulls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If no fastening mechanism is used to simplify the structure, then the device complexity is reduced, but the circuit board becomes loose and detaches under external pressure
Solution Approach 1:
The outer casing is segmented into multiple functional components: vertical positioning slots for vertical positioning, stop portions for horizontal positioning, and integrated fastening structures. This segmentation allows each component to perform its specific function independently, securing the circuit board effectively without requiring a complex overall structure.
Solution Approach 2:
The fastening mechanism is merged into the outer casing itself, combining the protective housing function with the fixation function. The vertical positioning slots and stop portions are integrated into the casing structure, eliminating the need for separate fastening components and maintaining structural simplicity while ensuring reliable circuit board fixation.
2Reliability
If a fastening mechanism is added to secure the circuit board, then the fixation reliability is improved, but the device complexity increases
Solution Approach 1:
The fastening mechanism is merged into the outer casing itself, combining the protective housing function with the fixation function. The vertical positioning slots and stop portions are integrated into the casing structure, eliminating the need for separate fastening components and maintaining structural simplicity while ensuring reliable circuit board fixation.
Solution Approach 2:
The outer casing serves multiple functions: it provides mechanical protection, vertical positioning through positioning slots, horizontal positioning through stop portions, and fixation through the integrated fastening structures. This multi-functionality reduces the need for additional dedicated components, maintaining device simplicity while achieving reliable fixation.
3Ease of manufacture
If the circuit board is loosely positioned to ease assembly, then the ease of manufacture is improved, but the circuit board displaces and detaches during repetitive plugging and pulling
Solution Approach 1:
The vertical positioning slots and stop portions are pre-formed in the outer casing during manufacturing, establishing the circuit board's correct position before assembly is complete. This preliminary positioning action ensures that the circuit board is correctly oriented and secured from the outset, preventing displacement during subsequent repetitive plugging and pulling operations while maintaining assembly simplicity.
4Reliability
If the circuit board is firmly fixed to prevent detachment, then the reliability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The positioning system is segmented into vertical positioning slots and horizontal stop portions, separating the precision requirements into two independent dimensional constraints. This segmentation allows each feature to be manufactured and assembled with moderate precision independently, while collectively providing firm fixation of the circuit board in three-dimensional space.
Data Source
AI summary
A micro plug connector has an insulative housing, multiple terminals, an outer casing, a front shell and a circuit board. The outer casing covers the insulative housing and has a vertical positioning slot and two stop portions to vertically and horizontally hold the circuit board. Therefore, the circuit board is firmly fabricated in the micro plug connector without disassembling out of the outer casing due to pull of wires in a transmission cable or a power cable.