Modular Locksmith Key with Interchangeable Elements
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Solution Overview
Problem
Existing locksmithing technologies face challenges in manufacturing and reproducing keys that ensure fidelity of the coding combination, mechanical solidity, resistance to repeated use, and security against break-ins, particularly for point or multipoint key systems with flat keys.
Innovation Solution
A modular locksmith key design featuring a gripping head and a receiving part with interchangeable elements, where the signature is encoded through variations in the reception elements, allowing for various combinations without the need for machining machines, enhancing modularity and robustness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional machining methods are used to produce key signatures, then manufacturing precision can be achieved, but device complexity and production time increase
Solution Approach 1:
The key receiving portion is divided into multiple interchangeable elements (first element, second element, third element) that can be assembled in different configurations. Each element has standardized connection interfaces (protrusions and recesses) allowing them to be combined in various sequences to create unique key signatures without requiring complex machining operations.
Solution Approach 2:
The interchangeable elements are designed with universal connection features that allow the same basic components to serve multiple functions. The same element types can be arranged in different sequences and combinations to produce numerous distinct key signatures, making the system versatile without requiring specialized machining equipment for each key type.
2Adaptability or versatility
If modular interchangeable elements are used in the key receiving portion, then manufacturing flexibility and modularity increase, but mechanical strength may be compromised
Solution Approach 1:
The interchangeable elements are designed to nest within each other through tapered surfaces and interference fits. Each element contains recesses that receive protrusions from adjacent elements, creating a nested configuration where multiple components are tightly integrated. This nesting arrangement distributes mechanical loads across multiple contact surfaces rather than relying on single weak connection points.
Solution Approach 2:
The elements are pre-configured with standardized connection geometries (protrusions, recesses, tapered surfaces) that ensure proper alignment and secure engagement before assembly. The design incorporates preliminary positioning features that guide the elements into correct relative positions during assembly, eliminating the need for complex alignment procedures that could compromise structural integrity.
3Productivity
If multiple interchangeable elements are assembled to create key signatures, then production time is reduced, but reliability of the assembly may decrease
Solution Approach 1:
The connection interfaces between elements incorporate asymmetric features such as tapered surfaces and directional protrusions recesses. These asymmetric geometries provide built-in alignment guidance that ensures elements can only be assembled in the correct orientation and sequence. The asymmetry prevents incorrect assembly while maintaining simple, rapid assembly procedures for correct configurations.
Solution Approach 2:
The elements include pre-formed connection features (protrusions, recesses, locking surfaces) that are manufactured with high precision beforehand. These preliminary prepared interfaces ensure that during rapid assembly, the elements self-align and engage reliably without requiring complex adjustment or verification procedures, maintaining both speed and reliability.
Data Source
Figure 1~2
Figure 3
Figure 4~7
AI summary
The key (1) has a characteristic receiving part (2) consisting of a series of interchangeable receiving elements (22), where each element supports a particular key operation. The element is threadedly mounted upon an assembly rod (25), which is common for all the elements and fixed in a gripping head of the key. The elements present co-operating forms between each other and/or with the rod to ensure a locating pin effect in rotation around the rod during assembly of the elements on the rod. An independent claim is also included for a method for manufacturing a locking key.