Asymmetrical Connector Unit Preventing Incorrect Insertion

The patent applies asymmetry by providing fixing protrusions at different positions on the first and second connectors. Specifically, the first connector has fixing protrusions at positions different from those on the second connector, creating an asymmetric configuration that allows easy perception of connection direction while maintaining manufacturing simplicity. This resolves the contradiction by enabling correct orientation identification without requiring complex symmetric designs.

The asymmetric positioning of fixing protrusions on the first and second connectors creates a directional guide that prevents incorrect insertion. The protrusions engage with corresponding grooves only in the correct orientation, physically blocking wrong-way insertion before pins can bend or short circuits can occur. This maintains low device complexity while eliminating harmful effects.

The patent implements asymmetry through minimal structural modifications - simply positioning fixing protrusions at different locations on the first versus second connector. This asymmetric arrangement provides reliable directional guidance and prevention of incorrect insertion while adding minimal structural complexity. The solution achieves high reliability through simple positional differentiation rather than complex mechanisms.