Latch Mechanism with Radial Status Indicator
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing latching devices do not effectively indicate whether they are in a latched or unlatched state, particularly in applications like baggage compartments in coaches or trains, leading to potential security issues if the compartment door opens during transit.
Innovation Solution
A latch mechanism with indicators that extend radially and remain visible when the latch is unlatched, providing a clear visual indication through color-coded or reflective means, ensuring the latch is recognized as open from a distance, and potentially using springs for actuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If no indicator is provided on the latching device, then the device structure remains simple, but the ability to indicate latched/unlatched state is lost
Solution Approach 1:
The indicator utilizes color changes to communicate latch status. The indicator is visible when the latch is unlatched and obscured when latched, providing clear visual information about the latch state without requiring complex electronic or mechanical indication systems.
Solution Approach 2:
The indicator serves as an intermediary element between the latch mechanism and the observer. It translates the internal mechanical state (latched/unlatched) into an external visual signal that can be easily perceived, thereby resolving the information loss without adding significant complexity to the core latching function.
2Difficulty of detecting and measuring
If the indicator is visible from all angles, then the status can be detected from any position, but the device structure becomes more complex
Solution Approach 1:
The indicator design leverages the spatial dimension created by the cap's rotation. Instead of making the indicator itself multi-directional or 360-degree visible, the solution uses the rotational movement of the cap to dynamically position the indicator in different spatial locations, achieving comprehensive visibility from various viewing angles through temporal-spatial sequencing.
3Illumination intensity
If the indicator extends radially when unlatched, then visibility from distance is improved, but the risk of accidental opening increases
Solution Approach 1:
The indicator employs dynamic positioning rather than a fixed extended state. The indicator extends radially only when the cap is rotated to the unlatched position, and is obscured when latched. This dynamic behavior provides high visibility when needed (unlatched state) while maintaining reliability by not creating a permanent protruding element that could be accidentally actuated.
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 mechanism provides a reliable and visible indication of the latch's status, preventing accidental opening and enhancing security by ensuring operators can easily verify the latch's closed position, especially in transportation applications.
Implementation Method 1
potentially using springs for actuation
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
A latch mechanism is provided that includes a housing, a cap, and at least one indicator. The cap may include a central axis and may be mounted for selective rotational movement relative to the housing about the central axis between a latched position and an unlatched position. The at least one indicator may be interposed between the cap and the housing, such that the cap is in covering relationship to at least a portion of the at least one indicator. The at least one indicator may also be mounted for radial movement outwardly from the central axis relative to the cap as the cap is rotated from the latched position to the unlatched position such that the cap is no longer in covering relationship to the portion of the at least one indicator.