Battery-Free Electronic Override for Mechanical Combination Locks
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Solution Overview
Problem
Existing mechanical combination locks for items like lockers and safes require labor-intensive processes for key changes and lack efficient electronic override solutions, especially those that do not require battery power.
Innovation Solution
A mechanical combination lock with an electronic key override that does not use battery power, allowing for easy programmability and convenience, and featuring a design that scrambles the dial combination upon opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a mechanical key override is used in combination locks, then administrators can open and reset combinations, but the process becomes labor-intensive and time-consuming
Solution Approach 1:
The patent replaces the mechanical key override system with an electronic override mechanism. The electronic system uses a keypad or electronic key to input override codes, which are processed by a microprocessor to electronically actuate the locking mechanism, eliminating the need for physical key cylinders and manual mechanical operations.
Solution Approach 2:
The electronic override system allows administrators to independently reset combinations using electronic codes without requiring physical keys or manual intervention in the mechanical key cylinder. The system provides self-service capability through electronic code entry and automatic processing.
2Reliability
If mechanical key cylinders are made secure and inaccessible, then lock security is improved, but rekeying becomes very labor intensive
Solution Approach 1:
The patent replaces the mechanical key cylinder system with an electronic locking mechanism controlled by a microprocessor. This substitution maintains security through electronic authentication while allowing easy reconfiguration of access codes without physical rekeying operations.
Solution Approach 2:
The electronic override system serves multiple functions: it provides secure access control, allows combination resetting, enables administrator override capabilities, and facilitates easy reconfiguration of locking codes all through a single electronic system rather than separate mechanical components.
3Ease of operation
If electronic locks are used to replace mechanical locks, then operational convenience is improved, but battery power requirements increase complexity and cost
Solution Approach 1:
The locking mechanism is designed to be actuated by the natural rotational movement of the dial itself. When the dial completes a full rotation, a cam mechanism automatically engages with a latch to actuate the locking or unlocking action, eliminating the need for separate power sources or actuation mechanisms.
Solution Approach 2:
The patent extracts and removes the battery power requirement from the electronic lock system. The design uses passive mechanical energy from dial rotation to trigger electronic sensors and actuate the locking mechanism, eliminating batteries, motors, and associated power management components.
4Reliability
If administrators manually re-key all locks at end of school year, then security is maintained, but the process is expensive and labor intensive
Solution Approach 1:
The patent replaces the manual mechanical rekeying process with an electronic code reset system. Administrators can remotely or locally reset combination codes through electronic keypads or override mechanisms, allowing rapid reconfiguration of multiple locks without physical key cylinder manipulation.
Solution Approach 2:
The system allows administrators to pre-program override codes and combination sequences in advance. When security updates are needed, the pre-configured electronic system enables rapid code changes across multiple locks without requiring on-site mechanical rekeying operations.
Data Source
AI summary
A combination lock can be operated manually via the manipulation of rotatable dials and by way of a key, such as an electronic key. The lock includes one or more rotatable dials each having multiple indicia disposed thereon. Rotation of the rotatable dials to predetermined indicia places the lock in the unlocked position. The lock can further include an electronic port and an actuator. Upon receipt of a predetermined credential via the port, the actuator can place the lock in in the unlocked position. The lock further includes a knob assembly that, when the lock is in the unlocked position, can be rotated between a first position in which the lock is in a latched position and a second position in which the lock is in an unlatched position. The combination lock may automatically scramble the positions of the dials upon opening for security purposes.