Rotating Barrel Lock Key System for Simplified Installation
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Solution Overview
Problem
Existing rotating disk barrel locks are delivered in a locked state, requiring installers to carry complex and expensive keys capable of both locking and unlocking, which complicates installation and poses security risks if lost or stolen, and increases manufacturing costs.
Innovation Solution
A key system comprising a master key that allows the lock to be delivered in an unlocked state and a simplified contractor key that can only lock the barrel lock, reducing manufacturing costs and enhancing security by allowing locks to be shipped unlocked and installed without the need for a key capable of unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the barrel lock is delivered in a locked state, then security is maintained during shipping, but installers must carry complex keys capable of both locking and unlocking, increasing cost and security risks
Solution Approach 1:
The key system is segmented into two distinct keys: a master key for unlocking and a contractor key for locking only. This segmentation allows the lock to be delivered in an unlocked state with a simple master key, while contractors use a simplified locking-only key, eliminating the need for complex dual-function keys and reducing security risks.
Solution Approach 2:
The unlocking function is extracted from the contractor key and assigned to a separate master key. This allows the contractor key to be simplified for locking operations only, while the master key handles unlocking. The extraction reduces key complexity and cost for contractors while maintaining security.
2Reliability
If the barrel lock is delivered in a locked state, then security is maintained during shipping, but the installation process becomes unnecessarily complicated
Solution Approach 1:
The lock is delivered in an unlocked state as a preliminary condition, allowing installers to install the lock directly without first needing to unlock it. This preliminary unlocked state simplifies the installation process while the master key remains available for unlocking if needed during or after installation.
3Adaptability or versatility
If a single key capable of both locking and unlocking is used, then versatility is achieved, but manufacturing costs increase and security risks increase if lost or stolen
Solution Approach 1:
The key system is segmented into a master key with full functionality and a contractor key with limited locking-only functionality. This segmentation allows for simplified, lower-cost manufacturing of contractor keys while maintaining the versatility needed for installation and security.
Solution Approach 2:
The contractor key is designed as a simplified, lower-cost key that performs only the locking function. This disposable-like approach reduces manufacturing costs and security implications, as a lost contractor key cannot unlock previously installed locks.
4Reliability
If the key surface is made complicated to obstruct picking, then security is improved, but the key becomes more expensive and difficult to manufacture
Solution Approach 1:
The complex cam surfaces are extracted from the contractor key and retained only in the master key. The contractor key uses a simplified surface that is easier and cheaper to manufacture, while the master key maintains the complex surfaces needed for security and full functionality.
Data Source
AI summary
A key system including a key for use with a barrel lock having a rotating locking mechanism. The key includes a grip portion and a shank portion operatively attached to the grip portion. The shank portion includes at least one cam surface for rotatably engaging the rotating locking mechanism to permit rotation of the mechanism in one of a clockwise or counter-clockwise direction, but not the other direction, to lock the barrel lock.