Door Lock Regulating Assembly for Fire Safety and Damage Resistance
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Solution Overview
Problem
Conventional door lock devices are prone to damage when forced to rotate and lack a fireproof mechanism, making them unsuitable for fire doors, as they cannot prevent accidental opening during a fire.
Innovation Solution
A door lock device with a regulating assembly that allows the operating assembly to be set into an idle state when locked, preventing external forces from damaging the mechanism, and incorporates a fireproof sheet with a hot melt security post that melts at high temperatures to maintain the locking state, preventing the door from being opened during a fire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rotary handle is forced to rotate when the door lock is in locking state, then the handle interlocking structure will be damaged, but the door lock cannot be used normally after being unlocked
Solution Approach 1:
The patent introduces a dynamic regulation mechanism that allows the operating assembly to switch between interlocking state and idle state. The regulating assembly enables the system to adapt its coupling state based on operational requirements, making the handle structure dynamically adjustable rather than fixed, thus resolving the contradiction between damage resistance and normal operation
Solution Approach 2:
The patent segments the door lock system into distinct functional assemblies: acting assembly, operating assembly, and regulating assembly. This segmentation allows independent control of the interlocking mechanism, enabling the operating assembly to be decoupled from the acting assembly when needed, thereby protecting the handle interlocking structure from damage while maintaining operational capability
2Ease of operation
If the conventional door lock is used on a fire door, then the door can be opened easily, but the door lock cannot prevent accidental opening during fire, causing fire to rush indoors
Solution Approach 1:
The patent introduces a temperature-sensitive parameter change mechanism through the hot melt security post. The security post's melting point is specifically selected to respond to fire temperatures, causing a phase change from solid to liquid that automatically triggers the locking mechanism to maintain locked state, thus resolving the contradiction between ease of opening and fire safety
Solution Approach 2:
The patent converts the harmful effect of high temperature (fire) into a beneficial protective action. The hot melt security post utilizes the thermal energy from fire to trigger the fireproof mechanism, transforming the harmful thermal condition into a protective response that prevents door opening during fire, thereby saving lives
3Ease of operation
If the operating assembly is always interlocked with the acting assembly, then the handle can always operate the lock tongue, but the lock mechanism is vulnerable to external forces
Solution Approach 1:
The patent implements a dynamic coupling mechanism between the operating assembly and acting assembly through the regulating assembly. The system can switch between coupled (interlocking) and decoupled (idle) states, allowing the handle to operate the lock tongue when needed while protecting against external forces when locked, thus resolving the contradiction between operational capability and protection
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
The solution ensures the door lock device remains functional and secure, even when subjected to external forces, and meets fire safety regulations by preventing accidental opening during a fire, thus protecting both the lock mechanism and individuals inside.
Implementation Method 1
a fireproof sheet displaceably disposed on the lock tongue base, wherein the fireproof sheet has a security post made of a hot melt material
Data Source
AI summary
A door lock device is provided and includes: a housing, an acting assembly arranged in the housing and having a lock tongue, an operating assembly arranged in the housing and interlocked with an outdoor handle, and a regulating assembly arranged in the housing for a user to regulate the operating assembly into an interlocking state or an idle state. As such, in the interlocking state, the outdoor handle drives the acting assembly through the operating assembly to cause the lock tongue to extend or retract relative to the housing, and in the idle state, the operating assembly cannot drive the acting assembly and the outdoor handle cannot be interlocked with the lock tongue.