USB Plug Connector Positioning Plate for Circuit Board Fixation
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Solution Overview
Problem
Existing USB electrical plug connectors lack sufficient bending resistance and secure fixation with the circuit board, leading to easy detachment of transmission terminals and instability during plug-in and plug-out operations.
Innovation Solution
The design incorporates a positioning plate with legs that extend from the metallic shell to enclose the base portion of the insulated housing, providing additional soldering points with the circuit board and enhancing structural strength, along with 180-degree symmetrical terminal arrangements for dual orientation compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the shell only covers the front of the insulated housing, then the structure is simple and easy to manufacture, but the bending resistance between the circuit board and the insulated housing is insufficient
Solution Approach 1:
The positioning plate extends from the rear of the metallic shell in the longitudinal direction, adding structural support to the previously uncovered rear portion of the insulated housing. This dimensional extension provides the necessary bending resistance without complicating the front coverage structure
Solution Approach 2:
The support structure is divided into two separate components: the metallic shell covering the front and the positioning plate at the rear. This segmentation allows each component to be optimized independently for its specific function while maintaining overall structural integrity
2Ease of manufacture
If the base portion of the insulated housing is exposed without positioning structure, then the manufacturing process is simplified, but the transmission terminals easily detach from the circuit board during bending or plug-in operations
Solution Approach 1:
The positioning plate acts as an intermediary component between the metallic shell and the circuit board. It provides additional soldering points and structural support that enhance the fixation of transmission terminals to the circuit board without complicating the basic assembly process
Solution Approach 2:
The positioning plate is pre-assembled with the metallic shell before final assembly with the circuit board. This preliminary positioning ensures proper alignment and provides stable support during the soldering process, preventing terminal detachment
3Strength
If additional positioning structures are added to the rear of the metallic shell, then the fixation and bending resistance are improved, but the device complexity increases
Solution Approach 1:
The positioning plate serves multiple functions simultaneously: it provides bending resistance to the insulated housing, creates additional soldering points for terminal fixation, and ensures proper positioning during assembly. This multi-functionality achieves enhanced fixation without proportionally increasing complexity
Data Source
AI summary
An electrical plug connector includes an insulated housing, a plurality of terminals, a metallic shell, and a positioning plate. The insulated housing includes a base portion, an upper portion, and a lower portion. The upper portion and the lower portion are extending from one side of the base portion. A mating room is between the upper portion and the lower portion. The terminals are held in the insulated housing. The metallic shell includes a tubular portion and a receiving cavity defined in the tubular portion. The insulated housing is received in the receiving cavity. The positioning plate is at the rear of the metallic shell to enclose the base portion. The positioning plate includes a first leg and a second leg respectively located at two sides of the base portion, so that the positioning plate can be assembled with a circuit board stably.