Appliance Latch with Multi-Feature Striker for Tamper Resistance

The striker is segmented into multiple functional features (first feature for latch engagement, second feature for anti-tamper engagement, third feature for positioning) that must all be present and correctly positioned. This segmentation requires tampering tools to replicate multiple specific features simultaneously, dramatically increasing the difficulty of tampering while maintaining mechanical simplicity.

The striker features are designed with asymmetric geometries where each feature has a specific shape, position, and orientation that must match its corresponding receiver. The first feature engages the latch trap, the second feature engages the anti-tamper operator, and the third feature positions the striker relative to a ward plate. This asymmetry ensures that only the properly shaped striker can activate the appliance, preventing casual tampering with common tools.

The patent replaces magnetic anti-tamper systems with a purely mechanical solution. The anti-tamper operator is a mechanical element that must be physically engaged by a specifically shaped second feature on the striker. This mechanical engagement provides reliable anti-tampering without the complexity and cost of magnets, electromagnetic actuators, and associated control electronics.

The mechanical features of the striker self-verify their authenticity through precise geometric engagement. The first feature must engage the latch trap, the second feature must engage the anti-tamper operator, and the third feature must position the striker correctly relative to the ward plate. This self-verifying mechanical system eliminates the need for external verification systems like magnets or sensors, reducing complexity while maintaining reliability.