Retractable Landscape Lamp Water Intrusion Seal
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Solution Overview
Problem
Existing retractable landscape lamps face challenges with water intrusion during the rising and falling of their upper portions, leading to potential water ingestion due to vacuum creation and lack of effective aspiration mechanisms.
Innovation Solution
The design incorporates a seal with a grease reservoir and a protective vent to prevent water entry, utilizing a cap that captures an air bubble for aspiration, ensuring the lamp can rise and fall without inhaling water, and shares a common base and drive mechanism for various lamp designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the upper portion of the lamp rises and falls, then the lamp is retractable and aesthetically pleasing, but water may be inhaled during the rising operation due to vacuum creation
Solution Approach 1:
A non-return valve is installed in the aspiration path before the lamp rises. This valve is pre-positioned to allow air passage during rising but automatically block water entry when vacuum pressure differential occurs, preventing water intrusion before it can happen
Solution Approach 2:
A grease reservoir is introduced as an intermediary substance between the seal and the water environment. The grease creates a hydrophobic barrier that prevents water from contacting the seal and being drawn into the lamp during rising operations
2Object-affected harmful factors
If a seal is used to prevent water entry, then water resistance is improved, but static and moving friction increase
Solution Approach 1:
The grease reservoir extracts the lubrication function from the seal interface itself. By providing grease through a dedicated reservoir system, the seal can maintain water resistance while the grease reduces friction between mating surfaces, separating the water sealing function from the friction generation
3Reliability
If the lamp operates in wet conditions, then landscape illumination reliability is improved, but electronics may be damaged by water intrusion
Solution Approach 1:
The non-return valve and grease reservoir work together to create preliminary protection against water intrusion. The valve is pre-configured to close against vacuum pressure, and the grease reservoir is pre-filled to provide immediate hydrophobic protection, both acting before water can reach the electronics
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
This solution effectively keeps the electronics dry and allows for reliable operation in wet conditions, enabling retractable and water-resistant landscape lamps with low static and moving friction, ensuring long-term reliability and adaptability across different designs.
Implementation Method 1
The design incorporates a seal with a grease reservoir and a protective vent to prevent water entry
Implementation Method 2
utilizing a cap that captures an air bubble for aspiration, ensuring the lamp can rise and fall without inhaling water
Data Source
AI summary
Apparatus and methods are disclosed which may keep retractable landscape lamps substantially free from water intrusion in operation for a variety of embodiments. Retractable lamps may have a lower fixed portion which could be buried in the ground and an upper portion which may rise and illuminate. When the upper portion rises it may create a low pressure or vacuum inside. Water may be pulled into the lamp which may lead to failure. The lamp may benefit from a seal between the lower and upper portions. A seal may consist of a flexible rubber material and a grease or other lubricant which may form a watertight seal with low friction. The upper portion may have a cap with provisions for aspiration. While traveling between the retracted and extended positions the lamp may aspirate through the bottom of this cap. The cap may be designed to trap an air reservoir when it retracts. It may then provide air for aspiration the next time the lamp rises to permit such a rise such as above wet conditions or above standing water. The cap may have a protective vent which may allow air to pass while restricting water from passing.