Motorized Double Door Lock Assembly with Automatic Panic Unlocking
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Solution Overview
Problem
Existing locking systems for double-leaf doors fail to ensure problem-free unlocking of both leaves during a panic situation and subsequent reliable automatic locking, leading to security and safety issues, particularly with active leaf bolts preventing closure after emergency opening.
Innovation Solution
Designing the active leaf lock as a motorized lock with a drive unit and position query sensors for both leaves, where the drive motor automatically unlocks the active leaf when the fixed leaf is opened and relocks it when closed, ensuring both leaves can be securely closed and locked.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the active leaf lock is designed as a multi-point locking system with extended bolts, then security is improved, but the ability to close the door after panic opening deteriorates due to jamming
Solution Approach 1:
The locking system transitions from a static locked state to a dynamic unlocked state through the motorized drive unit. The bolts are dynamically retractable, allowing them to extend for security and retract for door closure, enabling the system to adapt its state based on operational requirements
Solution Approach 2:
The manual mechanical locking system is replaced with a motorized drive unit that automatically controls the locking elements. This substitution enables automated unlocking when the fixed leaf opens and automated relocking when the active leaf closes, eliminating the jamming problem while maintaining security
2Ease of operation
If manual panic locking mechanisms are used, then ease of operation during panic is improved, but reliability of subsequent locking deteriorates
Solution Approach 1:
The manual panic locking mechanism is supplemented with a motorized drive unit that automatically executes locking operations. The motorized system ensures reliable locking after panic opening by automatically engaging the locking elements when the door closes, eliminating reliance on manual operation for subsequent locking
Solution Approach 2:
The locking system performs self-service by automatically unlocking when the fixed leaf opens (detecting panic condition) and automatically relocking when the active leaf closes. This self-acting mechanism ensures both ease of operation during panic and reliability of subsequent locking without requiring manual intervention
3Ease of operation
If automatic unlocking is implemented during panic, then safety is improved, but security after panic deteriorates due to failure to relock
Solution Approach 1:
The system uses feedback from position query sensors to detect the opening of the fixed leaf and the closing of the active leaf. This feedback triggers the motorized drive unit to automatically unlock during panic and automatically relock after panic, ensuring both safety during emergency and security afterward
Solution Approach 2:
The manual relocking process is replaced with an automated motorized system that responds to sensor feedback. The motorized drive unit ensures the locking elements are reliably re-engaged after panic opening, maintaining security without requiring manual intervention
Data Source
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AI summary
The locking system for a double door comprising a stationary door (1) and an opening door (2) comprises a central lock (9) and auxiliary locks (11) on the opening door which are fitted with an automatic opening system (16). The stationary door has a sensor (17) which detects if it is open or the crash bar (7) has been operated and automatically unlocks the opening door.