Key Blank Orientation Detection Using End Stop Displacement
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Solution Overview
Problem
Existing key duplication systems, particularly self-service vending machines, face challenges in ensuring that users properly insert key blanks, leading to potential miscuts and user frustration due to the lack of effective orientation detection and verification mechanisms.
Innovation Solution
A key blank receiving module with a slot and opposing jaws that engage the key blank, featuring an end stop capable of linear displacement and sensors to detect proper insertion, along with a display and controller to guide users and verify correct orientation, preventing cuts unless the key blank is correctly positioned.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If simple mechanical slot and jaw structure is used for key blank receiving, then device complexity is reduced, but orientation detection capability deteriorates
Solution Approach 1:
A simple end stop acts as an intermediary mechanical element between the key blank and the sensor system. The end stop converts the positional information of the key blank into linear displacement that can be easily detected by basic sensors, eliminating the need for complex direct detection mechanisms while maintaining accurate orientation verification
Solution Approach 2:
The patent replaces complex mechanical orientation detection mechanisms with a simplified system combining basic linear displacement sensors and computational logic. Instead of using sophisticated mechanical switches or multi-component detection assemblies, the system uses straightforward sensors to measure end stop position and determines orientation through software processing
2Measurement precision
If complex sensors are used to detect key blank orientation, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The end stop serves as a mechanical intermediary that translates key blank orientation into simple linear displacement. This allows basic linear sensors to achieve accurate orientation detection without requiring complex sensor assemblies, maintaining measurement precision while simplifying the sensing mechanism
Solution Approach 2:
The system substitutes complex mechanical orientation sensors with simple linear displacement sensors combined with computational analysis. The orientation determination is achieved through software processing of basic sensor data rather than through sophisticated mechanical detection mechanisms
Data Source
AI summary
Systems and methods for duplicating keys are disclosed. A key duplication system receives a key blank into a key receiving module. The key receiving module includes opposable jaws that assist with alignment of the key blank within the module. The key receiving module also includes an end stop that engages the tip of the received key blank and is linearly displaced as the key blank is further inserted. The linear displacement of the end stop is compared to a known value corresponding to a length of the shank of the key blank, and if the displacement does not match the known value, the user is instructed to re-orient the key blank.