Self-locking Push Button for Agricultural Vehicle Door Security
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Solution Overview
Problem
Existing vehicle door locks for agricultural vehicles and construction machines lack high functional security, particularly in meeting EU Regulation No. 1322/2014, which requires secure opening mechanisms to prevent unauthorized access, and existing pushbuttons do not ensure automatic self-locking and key-dependent unlocking mechanisms.
Innovation Solution
A pushbutton design featuring a self-actuated actuation knob that automatically returns to its locked position after use, utilizing a cylinder lock core that can only be unlocked with a key, ensuring the key can only be withdrawn when the pushbutton is fully locked, and incorporating a spiral compression spring for mechanical self-locking and unlocking mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pushbutton with cylinder lock is used for vehicle door unlocking, then security against unauthorized access is improved, but the complexity of the device increases
Solution Approach 1:
The patent combines the pushbutton actuation mechanism with the cylinder lock into a single integrated unit. The actuation knob is directly connected to the cylinder lock core, merging the unlocking and actuation functions into one component assembly, thereby reducing overall device complexity while maintaining security
Solution Approach 2:
The pushbutton serves multiple functions: it acts as both the actuation mechanism for unlocking the vehicle door and as the cylinder lock itself. The actuation knob simultaneously functions as the key-operated lock interface, eliminating the need for separate locking and actuating components
2Reliability
If the pushbutton automatically returns to locked position after actuation, then functional security is improved, but the mechanism complexity increases
Solution Approach 1:
The pushbutton mechanism is designed to automatically return to its locked position after actuation without requiring manual intervention. The spring-loaded mechanism self-actuates the reset function, and the cylinder lock automatically re-engages, making the system self-service and eliminating the need for additional control mechanisms
Solution Approach 2:
The pushbutton operates in periodic cycles: when actuated, it unlocks the door, then automatically returns to the locked position after a brief period. This periodic automatic resetting behavior ensures continuous security without requiring complex control systems
3Reliability
If the key can only be withdrawn when the pushbutton is fully locked, then security is improved, but the operational complexity increases
Solution Approach 1:
The cylinder lock is designed so that the key cannot be withdrawn until the pushbutton has automatically returned to its locked position. This preliminary locking action ensures that the door remains secured during the actuation cycle, and only after complete resetting does the key become removable
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 pushbutton provides high functional security by automatically locking after use, preventing unauthorized access and ensuring the key cannot be withdrawn during operation, enhancing safety and compliance with EU regulations, while maintaining simplicity and cost-effectiveness in assembly.
Implementation Method 1
incorporating a spiral compression spring for mechanical self-locking and unlocking mechanisms
Data Source
AI summary
The present invention relates to a self-locking pushbutton for unlocking of a lock for a vehicle door, hood, covering or hatch, in particular of an agricultural vehicle, e.g. of a tractor, or of a construction machine.