Latch Mechanism Axial Indicator Status Detection
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Solution Overview
Problem
Existing latching devices lack a clear visual indication of their latched or unlatched state, which can lead to security issues, such as unsecured baggage compartments in transit, as operators may not easily verify the latch status.
Innovation Solution
A latch mechanism featuring a housing and cap with a rotatable indicator that axially displaces from a withdrawn to an extended position as the latch transitions from latched to unlatched, providing a visual enhancement, like a bright red color, to clearly indicate the latch status from a distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If a traditional latch mechanism is used without visual indicators, then the device complexity is reduced, but the ability to detect latch status from a distance deteriorates
Solution Approach 1:
The patent employs color-coded indicators (red for unlatched, green for latched) that change position relative to the housing to provide immediate visual status detection. This allows operators to verify latch status from a distance without adding complex mechanical or electronic systems.
Solution Approach 2:
The indicator elements are positioned to extend axially beyond the housing surface when in the unlatched state, creating a three-dimensional visual signal. This dimensional protrusion makes the latch status detectable from a distance without requiring additional sensors or complex mechanisms.
2Reliability
If an indicator system is added to show latch status, then the reliability of security monitoring is improved, but the device complexity increases
Solution Approach 1:
The latch mechanism itself generates the visual indicator signal through its own operational state. The indicator elements are mechanically coupled to the latch components, so the latch's movement automatically positions the indicators to show its status without requiring external power sources, sensors, or control systems.
Solution Approach 2:
The indicator function is merged with the existing latch mechanism structure. The indicators are integrated into the cap and housing assembly, sharing common components and mounting structures with the latch system, thereby avoiding the need for separate indicator systems.
3Illumination intensity
If the indicator extends axially above the housing surface, then the visual warning capability is improved, but the risk of accidental damage to the indicator increases
Solution Approach 1:
The indicator elements are designed to be dynamically positioned based on latch state. They extend axially only when the latch is unlatched (when warning is needed) and retract when latched, optimizing visibility when required while minimizing exposure to damage when not needed.
Solution Approach 2:
The indicator elements have different physical properties at different locations. The portions that extend axially are positioned to provide maximum visual warning, while the base portions remain protected within the housing structure, creating localized vulnerability only where absolutely necessary for function.
Data Source
AI summary
A latch mechanism is provided having a housing, a cap, and at least one indicator. The housing may include a first top surface. The cap may include a second top surface and may be mounted for selective rotational movement relative to the housing between a latched position and an unlatched position. The at least one indicator may be interposed between the cap and the housing and mounted for axial movement relative to the cap. As the cap is rotated from the latched position to the unlatched position, at least a portion of the indicator is axially displaced to an extended position above at least one of the first and second top surfaces.