Waterproof LED Lamp Interference Fit Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Outdoor lighting lamps are prone to damage from rainwater, and existing solutions that comply with UL standards using expensive PC materials are costly, while cheaper transparent plastic lampshades fail cold smashing tests, risking electric shock.
Innovation Solution
An LED lamp design featuring a lampshade made of ordinary transparent plastic with a PC lamp post cover that provides an interference fit, ensuring waterproofing and compliance with UL standards by encasing electronic components when the lampshade shatters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a PC lampshade is used to comply with UL standards, then safety and waterproofing are improved, but material cost increases significantly
Solution Approach 1:
The lamp structure is divided into multiple components with different material requirements: the lampshade uses inexpensive ordinary transparent plastic, while only the lamp post cover (which houses electronic components) uses expensive PC material. This segmentation allows the expensive material to be used only where safety is critical, rather than the entire lampshade, thus reducing overall material cost while maintaining safety and waterproofing performance.
2Quantity of substance
If an ordinary transparent plastic lampshade is used to reduce cost, then material cost decreases, but the lampshade shatters during cold smashing test causing electric shock risk
Solution Approach 1:
The lamp is segmented into a lampshade (ordinary plastic) and a lamp post cover (PC material). The lamp post cover acts as a protective enclosure for electronic components, ensuring that even if the lampshade shatters, the dangerous components remain protected. This segmentation allows cost reduction in the lampshade while maintaining safety through the PC lamp post cover.
Solution Approach 2:
The lamp post cover serves as an intermediary protective element between the lampshade and the electronic components. It mediates the safety function by providing a shock-resistant barrier that protects components from impact, while allowing the lampshade to use cheaper material. The lamp post cover thus acts as a safety intermediary that decouples the safety requirement from the entire lampshade structure.
3Reliability
If the lamp post cover and lamp post use interference fit, then waterproofing is improved, but assembly complexity increases
Solution Approach 1:
The mounting part integrates multiple functions: it provides structural support, enables interference fit connection with the lamp post cover, and ensures waterproof sealing. By merging these functions into a single integrated component rather than separate parts, the design achieves good waterproofing through the interference fit while avoiding the assembly complexity that would result from multiple separate sealing components.
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 achieves a good waterproof effect and meets UL standards by encasing electronic components, preventing direct human contact with power supplies and reducing material costs.
Implementation Method 1
a lamp post cover is provided in the mounting part with interference fit; the lamp post cover has an opening at a first end thereof which is close to the lamp cap; a lamp post is provided at the opening with interference fit
Data Source
AI summary
This invention discloses an LED lamp including a lampshade, a lamp cap, a light source device and electronic components; the lampshade includes a cover body and a mounting part; a lamp post cover is provided in the mounting part with interference fit; a lamp post is provided at the lamp post cover with interference fit; the electronic components are installed on the lamp post, and the light source device is installed between the lamp post and the lamp post cover. By positioning the light source device between the lamp post cover and the lamp post, and by pressing the lamp post cover and the lamp post into the mounting part of the lampshade, a good seal is formed among the lamp post cover, the lamp post and the lampshade, thereby effectively improving the waterproof level of the lamp.