Emergency Lock Mechanism for Keyless Dual Bolt Retraction
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Solution Overview
Problem
Conventional emergency door locks are complex and expensive, requiring a key for external operation and an additional unlocking device for internal keyless operation, which complicates emergency situations.
Innovation Solution
A lock design that allows both the latch bolt and deadbolt to be retracted by rotating either handle, utilizing a mechanism with a transmission plate, guide members, and resilient units to disengage the deadbolt and latch bolt without a key, enabling internal handle operation for emergency unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional lock with latch bolt and deadbolt is used, then security is maintained, but the structure becomes complicated and expensive
Solution Approach 1:
The patent combines the latch bolt and deadbolt into a single integrated locking mechanism where one handle operation controls both bolts simultaneously. The handle is connected to a transmission mechanism that can retract both the latch bolt (first bolt) and deadbolt (second bolt) through a unified structural design, eliminating the need for separate control mechanisms and reducing overall complexity.
Solution Approach 2:
The handle is designed with multi-functionality to operate both the latch bolt and deadbolt. By rotating the handle, users can simultaneously control the retraction of both bolts, and the mechanism also provides emergency unlocking capability from the interior without keys, making a single component serve multiple security functions.
2Reliability
If a key is required to operate the deadbolt, then security is improved, but emergency access becomes difficult
Solution Approach 1:
The mechanism includes an emergency release feature that is pre-configured to allow interior users to retract both the latch bolt and deadbolt simultaneously by operating the handle, without requiring keys or additional unlocking devices. This preliminary design ensures that emergency access is immediately available when needed.
Solution Approach 2:
The lock mechanism enables interior users to independently unlock both bolts from the inside without external assistance or keys. The handle operation directly triggers the retraction mechanism for both bolts, allowing occupants to self-rescue during emergencies without depending on external key holders or complex unlocking procedures.
3Reliability
If separate mechanisms are used for latch bolt and deadbolt, then security is enhanced, but operation time increases
Solution Approach 1:
The transmission mechanism merges the control of both bolts into a single operational sequence. When the handle is rotated, the connected mechanism simultaneously initiates retraction of both the latch bolt and deadbolt through integrated linkages, reducing the total unlocking time compared to sequential operation of separate mechanisms.
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 quick and keyless unlocking of both the latch bolt and deadbolt from the inside, simplifying emergency door access while maintaining security features, thus addressing the complexity and cost issues of conventional locks.
Implementation Method 1
The spring biased between inside of the latch bolt recess and the passive member. When in a closed position, the spring extends to protrude the head out from the case. When in an opened position, the spring is compressed and the head does not protrude out from the case.
Implementation Method 2
A first resilient member is connected to the first positioning portion and biases the first contact portion. When the first transmission member is assigned to the top rotation member and is rotated by the top rotation member, the first contact portion compresses the first resilient member and pushes the passive member so that the spring is compressed and the head does not protrude out from the case.
Implementation Method 3
A resilient unit is located in the third positioning portion and biased between the restriction plate and the bottom of the third positioning wall. A resilient direction of the resilient unit is correspondent to the first guide hole. The restriction plate includes at least one engaging member. The bottom of the restriction plate is located on the rail. The guide slot pulls the second guide member to move the deadbolt to the unlocked position.
Data Source
AI summary
A lock with an emergency unlocking feature includes a latch bolt, a top rotation member, a restriction plate and a driving member. The driving member is connected to the deadbolt. When the top rotation member is rotated from a close position to an open position while the lock is locked, a restriction member drives the restriction plate to press a resilient unit. The restriction plate is moved to disengage the engaging member on the restriction plate from the second notch of the driving member. The guide slot of the transmission plate pulls the second guide member to move the deadbolt to the unlocked position, and the latch bolt moves to the open position. When in an emergency situation, the user rotates the handle to retract both of the deadbolt and the latch bolt without using a key to unlock the deadbolt to save time.