Movable Door Lock Hook Tongue Control Mechanism
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Solution Overview
Problem
Existing locks for movable doors can cause safety accidents when the hook tongues extend out uncontrollably, potentially injuring pedestrians due to inadequate control mechanisms.
Innovation Solution
A lock design featuring hook tongues that can automatically reset between a head-raising and head-lowering state using elastic springs, combined with guide grooves and shifting blocks to control their movement, ensuring safe locking and unlocking operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hook tongues are enabled to extend out of the lock shell for locking operation, then the locking function is improved, but the safety hazard increases due to potential uncontrolled extension
Solution Approach 1:
The hook tongues are designed to be dynamically controllable, transitioning between extended and retracted states. The control mechanism enables the hook tongues to extend outward for locking operations and retract inward for safety, eliminating the hazard of uncontrolled extension while maintaining effective locking capability.
Solution Approach 2:
The control mechanism incorporates feedback control to monitor and regulate the position of the hook tongues. This ensures that the hook tongues extend only when intended for locking and retract when not needed, preventing uncontrolled extension and associated safety hazards.
2Object-affected harmful factors
If additional control mechanisms such as buttons are added to control hook tongue movement, then the safety is improved, but the device complexity increases
Solution Approach 1:
The control mechanism is designed to perform multiple functions: controlling hook tongue extension and retraction, monitoring lock status, and providing safety interlocks. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in device complexity while maintaining comprehensive safety control.
Solution Approach 2:
The control mechanism integrates multiple control functions into a unified system. The button or control interface combines locking control, unlocking control, and safety monitoring functions, reducing the number of separate components and simplifying the overall control architecture while maintaining safety.
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 design enhances safety by preventing hook tongues from extending out uncontrollably, reducing the risk of injury and improving the overall safety of the lock mechanism.
Implementation Method 1
Each of the lock tongue reset springs is provided with two free ends, one of the free ends is combined with the lock tongue support frames, the other one of the free ends is combined with the hook tongues so that the hook tongues are capable of automatically resetting from a head-lowering state to a head-raising standing state under an elastic drive of the lock tongue reset springs
Data Source
AI summary
A lock capable of locking a movable door includes a lock shell having opening parts, and hook tongues extending out of the opening parts. The lock further includes lock tongue support frames, lock tongue reset springs, left and right first guide grooves, and shifting blocks. The lock tongue support frames are movably disposed on the lock shell and combined with shaft pins. The hook tongues have lower shaft holes and rotatably sleeve the shaft pins via the lower shaft holes. Each lock tongue reset springs has one free end combined with the lock tongue support frames, and another one free end combined with the hook tongues. The left and right first guide grooves are symmetrically-arranged and correspond to the shaft pins. Two ends of the shaft pins respectively extending into the left and right first guide grooves. The shaft pins drive the hook tongues to move to be unhooked or locked when the lock tongue support frames move to drive the shaft pins to move along the left and right first guide grooves. Axial centers of the shifting blocks have center holes that allow shifting sheets to be inserted therein. The lock tongue support frames are able to move back and forth to respond to rotation of shifting handles on the shifting blocks when the shifting blocks rotate.