Sealed Isolation Waterproof LED Bulb Stem Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing waterproof LED lamp bulbs face issues with water seepage due to inadequate sealing, which compromises their waterproof performance.
Innovation Solution
A sealed isolation type waterproof LED lamp bulb design featuring a stem assembly with a rubber seat, metal wires, and a sealant layer that forms a filling recess to completely isolate the internal components from the external environment, enhancing waterproofing without increasing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a silica gel plug and waterproof ring are used to seal the opening portion of the shell, then the waterproof performance is improved, but water seepage still occurs and waterproof performance needs further improvement
Solution Approach 1:
The patent uses a composite sealing structure combining a rubber seat (elastic material) with sealant material to create a multi-material sealing system. The rubber seat provides mechanical sealing through elastic deformation, while the sealant material fills gaps and provides chemical bonding, creating a composite sealing solution that overcomes the limitations of single-material sealing approaches.
Solution Approach 2:
The rubber seat is designed as a flexible elastic component that can deform to adapt to the opening portion of the shell. This flexible sealing element can accommodate manufacturing tolerances and assembly variations, maintaining effective sealing contact through its elastic properties, which rigid sealing components cannot achieve.
2Reliability
If a rubber seat with accommodating holes and sealant layer is used to form a filling recess, then waterproof performance is greatly improved, but the structure becomes more complex
Solution Approach 1:
The rubber seat serves multiple functions simultaneously: it provides the primary sealing interface with the shell opening, contains accommodating holes for wire passage while maintaining sealing, supports the PCB light source panel through its upper end, and works together with the sealant layer to create the filling recess. This multi-functionality reduces the need for separate components.
Solution Approach 2:
The patent merges the sealing function, wire protection function, and support function into a single integrated rubber seat component. The accommodating holes are formed directly in the rubber seat, combining the wire conduit function with the sealing structure, eliminating the need for separate grommets or conduits.
3Reliability
If the rubber seat is designed with a cylindrical portion and supporting portion, then the sealing and support functions are improved, but the material usage increases
Solution Approach 1:
The rubber seat is segmented into distinct functional portions: a cylindrical portion for sealing against the shell opening and a supporting portion for bearing the PCB light source panel. This segmentation allows each portion to be optimized for its specific function while using minimal material - the cylindrical portion provides sealing surface area only where needed, and the supporting portion provides localized support rather than full coverage.
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 significant improvement in waterproof performance, maintains a simple structure, and reduces material usage, thereby extending the lamp bulb's quality and service life while keeping production costs low.
Implementation Method 1
A sealant layer for sealing and waterproofing is arranged at the filling recess
Implementation Method 2
The rubber seat is matched with the opening portion of the shell. A filling recess is formed by the rubber seat and the opening portion of the shell
Implementation Method 3
An upper surface of the PCB light source panel is provided with at least one LED illuminant
Data Source
AI summary
A waterproof light-emitting diode (LED) lamp bulb, including a lamp base and a shell connected with the lamp base, and further including a stem assembly; the stem assembly is connected to an opening portion of the shell; the stem assembly includes a rubber seat, and a first metal wire, a printed circuit board (PCB) light source panel and a second metal wire which are electrically connected with each other in sequence; the rubber seat is matched with the opening portion of the shell; a filling recess is formed by the rubber seat and the opening portion of the shell; the rubber seat is further provided with at least two accommodating holes that the metal wires pass through; and a sealant layer for sealing and waterproofing is arranged at the filling recess.