Double-Locked Door Barrier With Sequential Child-Resistant Unlocking
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Solution Overview
Problem
Existing safety door barriers with dual locking mechanisms are vulnerable to being unlocked by older children who observe and imitate their parents' unlocking operations, reducing safety effectiveness and causing inconvenience due to complex unlocking processes, especially in frequent entry and exit scenarios.
Innovation Solution
A double locked safety door barrier with a 'U' shape door frame and dual unlocking components, requiring sequential operation of lower and upper unlocking components to unlock the door, enhanced by a two-way lock structure and automatic closing mechanism, ensuring stability and convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dual locking mechanism is used to prevent children from easily unlocking, then safety is improved, but the unlocking process becomes complex and inconvenient for frequent entry and exit
Solution Approach 1:
The locking mechanism is divided into two independent locking tongues (upper and lower) that can be controlled separately. Each locking tongue has its own control button, allowing the system to be segmented into independent functional units that maintain security while enabling flexible operation patterns.
Solution Approach 2:
The first locking tongue is designed to be unlocked before the second locking tongue in the normal operation sequence. This preliminary action creates a staged unlocking process where the first lock releases to allow access to the second lock, providing security through sequence while maintaining operational convenience.
2Reliability
If complex rotating or sliding unlocking devices are used to prevent children from accidentally opening, then protective effect is enhanced, but the unlocking process requires more force and complex operations reducing ease of use
Solution Approach 1:
The traditional mechanical rotating or sliding unlocking devices are replaced with a button-controlled locking tongue retraction mechanism. This substitution uses simpler linear motion and button actuation instead of complex rotational or sliding mechanisms, reducing the force and complexity required while maintaining security through the dual-lock design.
3Ease of operation
If simple bidirectional opening with automatic locking is used, then ease of operation is improved, but children can easily unlock by observing and imitating parents, reducing safety
Solution Approach 1:
The single locking mechanism is segmented into two independent locking tongues controlled by separate buttons. This segmentation increases the observational and imitative complexity for children, as they would need to understand and replicate a two-step sequential process rather than a simple single-action unlock, thereby enhancing safety while maintaining operational simplicity for adults.
Data Source
AI summary
A double locked safety door barrier is provided, which includes a door frame and a door leaf hinged inside the door frame. A switch housing is provided on the door leaf, an upper locking tongue and a lower locking tongue are respectively provided in the switch housing and at a bottom of the door leaf. An upper locking buckle and a lower locking buckle are provided on the door frame; an upper unlocking component and a lower unlocking component are respectively provided on the switch housing. The lower unlocking component is connected to the lower locking tongue through a connector and is provided with a two-way lock structure that can only be driven to be retracted by pressing the upper unlocking component after pressing the lower unlocking component. The two-way lock structure simplifies the user's operation process and increases the safety of a locker.