Plug Connector Asymmetric Projections Prevent Reverse Insertion

The patent employs asymmetric design in multiple components: the tongue plate has an asymmetric shape with specific orientation requirements, the projections on the insulating body are positioned asymmetrically to match corresponding housing slots in the metal shell, and the stopper block is located at a specific asymmetric position. These asymmetric features ensure that the connector can only be inserted in the correct orientation, preventing oblique or reverse insertion while maintaining simple operation.

The patent divides the alignment function into multiple segmented components: the insulating body contains projections that correspond to housing slots in the metal shell, the tongue plate has its own alignment features, and the stopper block provides additional positioning. This segmentation of alignment functions across different components achieves precise insertion alignment while distributing the complexity across modular elements rather than requiring a single complex mechanism.

The patent implements preliminary protective measures through the asymmetric alignment features (projections and housing slots) and the stopper block positioned on the tongue plate. These features prevent incorrect insertion before damage can occur by making it mechanically impossible to insert the connector in the wrong orientation. This preliminary prevention avoids the need for more complex post-failure protection mechanisms while maintaining manufacturing simplicity.