Multi-Stage Interlock with Reduction Gear for Luggage
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Solution Overview
Problem
Conventional single-stage locks require significant force to lock suitcases, making them inconvenient to use during packing.
Innovation Solution
A novel multi-stage interlock system with a main lock and side locks, utilizing a control mechanism with reduction gears and springs to reduce the force required for locking, providing audible feedback and modular design for adjustable security based on luggage size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional single-stage locks are used, then the locking mechanism is simple, but quite force is required to lock the suitcase making it inconvenient to use
Solution Approach 1:
The locking mechanism is divided into multiple stages with multiple lock hooks (first lock hook, second lock hook, third lock hook) that engage sequentially. Each stage locks at a different position, distributing the locking force across multiple engagement points rather than requiring single-point force concentration, thereby reducing the effort needed for each individual locking action.
Solution Approach 2:
The lock body includes a pushing component that automatically pushes the lock hooks into their locked positions with the lock holes after the user initiates locking. This preliminary automated action reduces the manual force the user must apply, as the system performs part of the locking work automatically through spring-driven or mechanism-driven hook engagement.
2Force
If multi-stage interlock system is implemented, then the force required for locking is reduced, but the device complexity increases
Solution Approach 1:
The control mechanism serves multiple functions: it controls the engagement of multiple lock hooks, manages the interaction between lock body and lock holes, and coordinates the pushing component's action. This multi-functional design consolidates what could be separate complex mechanisms into a single integrated control system, reducing overall device complexity while maintaining multi-stage locking capability.
Solution Approach 2:
The lock hooks are nested within the lock body structure, with the first, second, and third lock hooks arranged in sequence within the same housing. The control mechanism is also nested within the lock body, managing all hook engagements from a centralized position. This nested arrangement reduces spatial complexity and simplifies the overall structure compared to distributed locking 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
The multi-stage interlock system reduces the force needed for locking, provides clear audible feedback, and allows for modular adjustment of security levels, enhancing user experience and manufacturing efficiency.
Implementation Method 1
The first plate is provided with two spring-loaded catches that engage, during closing, with the two saw-toothed gears fixed to the second plate
Implementation Method 2
A pair of main lock assemblies are located on both sides of the control mechanism. The control mechanism can control the locking and unlocking of all the main lock assemblies synchronously
Data Source
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AI summary
Provided is a novel multi-stage interlock, including a main lock and a pair of main lock hooks adapted for the main lock. The main lock includes a main lock housing, a control mechanism, and a pair of main lock cylinder assemblies. The main lock cylinder assemblies and the control mechanism both are arranged within the main lock housing. The pair of main lock assemblies are located at both sides of the control mechanism, respectively. The control mechanism is capable of controlling the locking and unlocking of all of the main lock cylinder assemblies. The main lock hooks are provided with a plurality of first protruding teeth adapted for the main lock cylinder assemblies. The present invention provides a multi-stage interlock which uses multiple-stage interlocking to realize easy closing for the case. The use of reduction gear further reduces the force to push the buttons. The feedback of sound during opening the case generated by the spring makes it clear to the users whether the lock is in place.