Door Lock Lighted Display for Emergency Status Confirmation
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Solution Overview
Problem
Current door locking systems in high-risk areas, such as classrooms, often require teachers to physically retrieve a key to lock doors during emergencies, which can be time-consuming and may result in delayed locking due to the key's potential loss or misplacement, and lack visual or auditory confirmation of proper locking status.
Innovation Solution
A locking mechanism with a signal generator, such as a light or sound indicator, that confirms the door's locked status, allowing for keyless locking from the inside and enabling retrofitting onto existing locks, along with a communication device for notifying authorities of emergency lock activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a key-actuated locking system is used, then security is improved, but the time required to lock the door during an emergency increases
Solution Approach 1:
The lock is pre-configured with a thumb turn mechanism that allows immediate locking without requiring key retrieval. The teacher can lock the door by simply turning the thumb turn, which has already been positioned and prepared for quick operation, eliminating the need to search for or retrieve a key during an emergency.
Solution Approach 2:
The key retrieval step is extracted and removed from the locking process. The thumb turn mechanism provides a keyless operation that bypasses the need to access, retrieve, and use a physical key, thereby eliminating the time-consuming steps associated with key management while maintaining security through the thumb turn's locking capability.
2Loss of time
If a thumb lock is provided for keyless operation, then locking speed is improved, but there is no visual confirmation of locked status
Solution Approach 1:
A light indicator is integrated into the lock mechanism that provides immediate visual feedback to the teacher about the locking status. When the thumb turn is rotated to the locked position, the light indicator illuminates to confirm that the door is securely locked, giving the teacher instant confirmation without requiring physical verification.
Solution Approach 2:
The lock mechanism incorporates a light indicator that changes its optical state (illumination) to communicate the locking status. The light transitions from off to on (or changes color) to provide clear visual information about whether the door is locked or unlocked, enabling the teacher to quickly verify the lock status at a glance.
3Loss of information
If a light indicator is added to show lock status, then information feedback is improved, but device complexity increases
Solution Approach 1:
The light indicator is merged with the existing thumb turn locking mechanism, integrating the feedback function into the already-present structural elements. The light indicator utilizes the same rotational movement and positioning mechanisms as the thumb turn, combining multiple functions (locking and indicating) into a single integrated assembly rather than adding separate independent components.
Solution Approach 2:
The thumb turn mechanism serves multiple functions: it provides the primary locking action and simultaneously actuates the light indicator to provide status confirmation. This multi-functionality reduces the need for separate components, as the existing thumb turn structure is utilized to control both the mechanical locking and the visual feedback systems.
4Reliability
If a communication device is added to notify authorities, then emergency response is improved, but device complexity and cost increase
Solution Approach 1:
A communication device is introduced as an intermediary between the lock mechanism and the emergency response system. When the thumb turn is rotated to the locked position, the communication device is automatically activated to send a notification to authorities, serving as a mediator that translates the local locking action into remote alerting without requiring direct integration with complex emergency response infrastructure.
Solution Approach 2:
The communication device is pre-configured and automatically activated when the lock is engaged. The notification system is prepared in advance and triggers immediately upon detection of the locked position, eliminating the need for manual activation or complex real-time decision-making during the emergency locking process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates rapid and secure door locking without the need for a key, provides visual or auditory confirmation of the locking status, and reduces costs by allowing retrofitting onto existing systems, while ensuring timely notification of emergency lock conditions.
Implementation Method 1
A lighting device 46 including a plurality of light emitting diodes 48 and two batteries 49 for powering the light emitting diodes 48 is mounted to the lever 34
Data Source
AI summary
A locking mechanism is provided for a portal closure that includes a first side, and a second side The portal closure including a latch movable into and out of engagement with a latch receiver and a latch driving device coupled to the latch for moving the latch into and out of engagement with the latch receiver The latch driving device includes a controllable lock member movable between a locked position where the latch is fixedly positioned in the latch receiver and an unlocked position where the latch is capable of being disengaged from the latch receiver and a second side latch driving device mover disposed on the second side of the portal closure. The locking mechanism includes a first side latch driving device mover disposed on the first side of the portal closures, and coupled to the latch driving device for moving the latch driving device to cause the latch to move into and out of engagement with the latch receiver. A signal generator is provided for generating a human detectable signal. A lock actuator is coupled to the controllable lock member for moving the locking mechanism between a first normal position wherein the second side lock driving device is capable of being moved between an unlocked position to permit the latch to be disengaged from the latch receiver and a locked position where the latch is prevented from being disengaged from the latch receiver; and a second emergency position wherein the second side lock driving device is in the locked position, and the signal generator is actuated to generate a human detectable signal. A power source is provided for powering the signal generator when the locking mechanism is in the second emergency position. A switch is coupled between the power source and the signal generator for controlling the flow of current between the power source and the signal generator.