Dual Lock System With Mechanical Linkage For Simultaneous Bolt Retraction
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Solution Overview
Problem
Dual lock systems for doors face challenges in balancing security and convenience while ensuring rapid egress in emergency situations, with existing systems not adequately addressing the need for independent external authentication and simultaneous internal bolt retraction.
Innovation Solution
A dual lock system comprising a primary lock with a latch bolt and a secondary high-security deadbolt lock, both controlled by independent external access interfaces, with a connecting element that transfers vertical movement of an actuator to rotary movement of a secondary lock's shaft for simultaneous retraction of both bolts upon internal handle activation, ensuring secure and convenient access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dual lock system with independent external access control interfaces is used, then security is improved, but device complexity increases
Solution Approach 1:
The dual lock system is divided into two independent lock mechanisms (primary lock with first bolt and secondary lock with second bolt), each with its own external access control interface. This segmentation allows independent authentication for each lock while maintaining overall system security, resolving the contradiction between enhanced security and system complexity.
2Speed
If a connecting element is added to transfer movement between locks, then egress speed is improved, but device complexity increases
Solution Approach 1:
The connecting element merges the operation of the primary and secondary locks by mechanically linking their actuators. When either lock is actuated, the connecting element transfers the movement to the other lock, enabling simultaneous bolt retraction and rapid egress while maintaining a relatively simple integrated structure.
3Ease of operation
If both bolts are retracted simultaneously upon handle activation, then egress convenience is improved, but control mechanism complexity increases
Solution Approach 1:
The connecting element acts as an intermediary mechanism between the primary and secondary lock actuators. It receives movement from either actuator and automatically transfers it to the other lock, enabling simultaneous bolt retraction through a simple mechanical mediation rather than complex coordinated control systems.
Data Source
AI summary
The dual lock system can have a primary lock having a first bolt, a first external access control interface, a handle on an internal face of the door, a first mechanism to control the retraction of the first bolt based on either one of the first external access control interface and the handle, the first mechanism having an actuator which is moveable vertically in response to the activation of the handle; a secondary lock having a second bolt, a second external access control interface, a second mechanism to control the retraction of the second bolt based on the second external access control interface, the second mechanism having a rotary shaft linked to the retraction of the second bolt; a connecting element connected to transfer the vertical movement of the actuator to a rotary movement of the rotary shaft, wherein both the first bolt and the second bolt are retracted upon activation of the handle.