Small Vehicle Door Lever and Latch Axis Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Small-sized vehicles require a simple and efficient lock mechanism for their doors that is easy to operate, as intricate mechanisms are not desirable and operability is crucial for such vehicles.
Innovation Solution
A door device with a swingable lever inside the door, where the rotational central axis of the lever supporting shaft is the same as the door lock's latch, allowing for easy interlocking without complex mechanisms, and the lever is positioned for easy access from both inside and outside, reducing the risk of interference during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple lock mechanism is used, then the device complexity is reduced, but the reliability of door locking may be compromised
Solution Approach 1:
The patent combines the lever operation and latch locking functions into a single integrated mechanism. The lever directly operates the latch through a shared rotational axis, merging what could be separate components into one unified system that achieves both simplicity and reliability
Solution Approach 2:
The lever serves multiple functions: it acts as both the operating handle for door opening and the driving element for the latch mechanism. This multi-functionality reduces overall device complexity while maintaining effective door locking through the integrated design
2Ease of operation
If the lever is positioned for easy access from outside, then the ease of operation is improved, but the lever may interfere with door operation during vehicle running
Solution Approach 1:
The lever is positioned at a specific location on the door that optimizes accessibility while avoiding interference zones. By carefully selecting the local position of the lever, the design achieves easy access from outside without creating harmful interference during vehicle operation
Solution Approach 2:
Instead of positioning the lever at the most accessible external point regardless of consequences, the design inverts the approach by considering operational constraints first and then optimizing accessibility within those constraints, placing the lever where it is sufficiently accessible but not in interference zones
Data Source
AI summary
A door device of a small-sized vehicle, that enables easily interlocking a door lock and a lever is provided. An openable door 70 is provided to a side of a body, a lever 92 provided inside the door 70 for opening the door 70 is swingably provided, and a rotational central axis of a lever supporting shaft 120 turned by a swing of the lever 92 and a rotational central axis of a latch for a door lock (a lever member 144) driven by a turn of the supporting shaft 120 are made the same.