Lock Status Indicator via Movable Escutcheon Plate
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Solution Overview
Problem
Many lock assemblies lack a visual status indicator to show whether the lock is in a locked or unlocked configuration, which can be inconvenient in certain applications.
Innovation Solution
An escutcheon assembly with a movable indicator plate that changes positions based on the lock's status, visible through windows in the escutcheon plate, using a cam and drive bar mechanism to display locked or unlocked symbols, ensuring visibility from various angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a lock assembly includes a status indicator, then visibility of lock state is improved, but device complexity increases
Solution Approach 1:
The indicator plate is merged with the escutcheon assembly, combining the status display function with the existing lock housing structure. The indicator plate contains both locked and unlocked symbols and is integrated into the escutcheon plate, eliminating the need for separate indicator mechanisms while providing clear status visibility through windows in the escutcheon.
Solution Approach 2:
The cam mechanism is directly connected to the drive bar, which is actuated by the lock mechanism itself. As the drive bar moves between locked and unlocked positions, the cam automatically rotates to display the corresponding symbol on the indicator plate, allowing the lock mechanism to self-indicate its status without requiring additional actuators or power sources.
2Adaptability or versatility
If a cam and drive bar mechanism is used to indicate lock status, then status visibility from multiple angles is improved, but manufacturing precision requirements increase
Solution Approach 1:
The indicator plate is positioned to extend beyond the plane of the escutcheon plate, creating a three-dimensional display that protrudes outward. This dimensional extension allows the status symbols to be visible from multiple angles and distances, enhancing adaptability for viewers positioned at different locations while the cam mechanism remains integrated within the existing spatial constraints of the lock assembly.
Data Source
AI summary
A lock assembly is disclosed that is operable to mechanically lock a moveable structure to a fixed structure. An escutcheon assembly having an indicator plate movable between a first position and a second position is operable to indicate a locked and unlocked configuration respectively of the lock assembly. A status indicator located proximate a front face and a pair of opposing side faces on the indicator plate to indicate a locked or unlocked status is visible across a 180 degree viewing angle.