Lost Motion Driver for Interchangeable Core Lock Rekeying
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Solution Overview
Problem
Current interchangeable core cylinder locks require removal and reinstallation for rekeying, increasing time and complexity due to limited rotational capacity of internal mechanisms.
Innovation Solution
Design of lock assemblies that allow both operating and rekeying keys to turn 180 degrees, enabling rekeying of the interchangeable core without removing it from the lock housing through a driver mechanism with 180-degree rotation capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the interchangeable core cylinder is removed for rekeying, then the core can be rekeyed with a new key, but the rekeying process time and complexity increase
Solution Approach 1:
The patent extracts the rotational motion capability from the housing and gives it to the driver mechanism. The driver is designed with independent rotational freedom allowing it to rotate 180 degrees while the housing remains stationary, enabling the core to be rekeyed in place without removing it from the housing.
Solution Approach 2:
The driver mechanism is designed with dynamic rotational capability, allowing it to rotate independently within the housing. The driver includes a rotational degree of freedom that enables 180-degree rotation during rekeying operations, transforming the static housing-driver relationship into a dynamic one where the driver can move independently to facilitate core rekeying.
2Ease of operation
If the driver is designed with 180-degree rotation capability, then the core can be rekeyed without removal, but the internal lock mechanism complexity increases
Solution Approach 1:
The lock assembly is segmented into distinct functional components: the stationary housing, the independently rotatable driver, and the interchangeable core. This segmentation allows the driver to have rotational capability without requiring the entire housing or core assembly to be complex. Each component has a specific function and degree of freedom, simplifying the overall design while enabling 180-degree rotation for rekeying.
Solution Approach 2:
The driver acts as an intermediary mechanism between the housing and the core. It mediates the rotational motion needed for rekeying by rotating independently within the housing while transmitting the necessary motion to the core. This intermediary role allows the core to be rekeyed without direct manipulation from the outside, simplifying the interface between the user and the internal mechanisms.
3Ease of manufacture
If the core remains installed during rekeying, then rekeying can be performed in place, but the key rotation angle is limited by the housing mechanism
Solution Approach 1:
The rotational capability is extracted from the housing and assigned to the driver mechanism. The housing remains stationary and simple, while the driver is given the freedom to rotate 180 degrees independently. This extraction allows the core to achieve full 180-degree rotation capability during rekeying while the housing maintains its simple, fixed structure.
Solution Approach 2:
The driver mechanism introduces dynamic rotational capability to the otherwise static housing-core assembly. The driver can rotate 180 degrees within the housing, providing the necessary motion range for rekeying operations while the core remains installed. This dynamic element enables full key rotation capability without requiring the housing itself to be complex or movable.
Data Source
AI summary
Lock assemblies having cylinders with interchangeable cores are provided. In one embodiment a lock assembly comprises a cylinder including a keyway and a core. Also, the lock assembly includes a first driver operatively connected to the cylinder. In particular, key cuts of the core are changeable without removing the cylinder from the driver.