Movable Lens Light Fixture Drainage for Water Buildup Control
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Solution Overview
Problem
Existing light fixtures with movable lenses face issues of fluid accumulation leading to degraded optical performance and increased risk of ingress, which existing solutions either reduce light output or depend on power and sensor functionality.
Innovation Solution
A light fixture design with a movable lens and integrated drainage elements that channel liquid away from the cavity formed by the lens movement, ensuring reliable drainage without impacting normal operation or optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a fixed transparent glass plate is added in front of the movable lens to prevent bucket formation, then fluid accumulation is prevented, but light output is reduced and aesthetics are affected
Solution Approach 1:
The patent extracts the drainage function from a solid barrier (glass plate) and implements it through a flexible membrane system with integrated drainage channels. The membrane is punctured to allow fluid passage while maintaining sealing, separating the structural support function from the drainage function, thereby eliminating the need for a light-blocking glass plate.
Solution Approach 2:
The flexible membrane acts as an intermediary element between the external environment and the internal light fixture components. It provides fluid protection through its selective permeability and integrated drainage system, allowing the movable lens to function without requiring a fixed glass plate that would obstruct light output.
2Reliability
If sensors and control systems are used for monitoring and selective drainage, then drainage is activated only when needed, but the system depends on power and proper sensor functionality
Solution Approach 1:
The drainage system operates autonomously through gravity-driven flow. The flexible membrane with integrated drainage channels automatically drains accumulated fluid without requiring external power, sensors, or control systems. The system self-regulates based on fluid accumulation, eliminating complex electronic dependencies while maintaining reliable drainage functionality.
3Object-affected harmful factors
If a drainage element is added to remove accumulated water, then fluid accumulation is prevented, but the device complexity increases
Solution Approach 1:
The patent merges the sealing function and drainage function into a single integrated flexible membrane component. The membrane incorporates both the sealant material for fluid protection and integrated drainage channels for fluid removal, eliminating the need for separate drainage components and reducing overall system complexity.
Solution Approach 2:
The flexible membrane serves as a thin-film solution that provides both sealing and drainage capabilities. Its flexibility allows it to accommodate lens movement while maintaining the drainage function through integrated channels, reducing structural complexity compared to rigid drainage systems.
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 effectively manages and removes accumulated liquid, enhancing durability and performance by preventing fluid ingress and maintaining optical quality, especially in outdoor conditions.
Implementation Method 1
At least one drainage element, guiding or channeling liquid out of the cavity, extends from the cavity to the external environment
Data Source
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AI summary
A light fixture is provided, comprising a light fixture housing with a housing sidewall extending circumferentially around a movable lens. The light fixture housing forms an inner space that includes at least one light source for emitting light through the movable lens. The movable lens is arranged on a light output side of the light fixture housing and is movable along the housing sidewall relative to the at least one light source. A sealing element is positioned between the housing sidewall and the movable lens, in order to seal the inner space from the exterior environment outside the light fixture. The movable lens defines a cavity in the housing on the light output side. This cavity is at least partially bounded by the movable lens and the sealing element on its inner side, while remaining open to the exterior on the light output side. To manage accumulated liquid within the cavity, the light fixture includes at least one drainage element. The drainage element extends from the cavity through the light fixture housing, providing a path for draining the accumulated liquid from the cavity to the exterior of the light fixture.