Integrated NEMA Socket Structure to Prevent Luminaire Water Ingress
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Solution Overview
Problem
Conventional NEMA sockets in outdoor luminaires are prone to water ingress, leading to deterioration and mechanical failures, particularly in IP66 rated luminaires, due to the reliance on gaskets and screws that can lose torque and deform, exacerbated by vacuum-induced suction forces.
Innovation Solution
Integration of a housing design with an integrated NEMA external ring and a wireless Zhaga Book 18 receptacle, eliminating the need for gaskets and allowing direct contact, combined with a surge protector module installed on the socket for easy maintenance and reduced water ingress risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional NEMA sockets with gaskets and screws are used, then standard socket functionality is achieved, but water ingress occurs due to loss of torque and deformation
Solution Approach 1:
The patent removes the gasket component from the sealing system, extracting the problematic element that degrades over time. The socket interface directly contacts the luminaire housing without requiring a separate gasket, eliminating the source of water ingress related to gasket deformation and torque loss.
Solution Approach 2:
The patent merges the socket mounting function directly with the luminaire housing structure. The socket interface is integrated into the housing cavity, creating a unified sealing path that eliminates the need for separate gaskets and multiple fastening points, thereby reducing potential failure points.
2Ease of repair
If gaskets and multiple screws are used for sealing, then initial water protection is provided, but maintenance complexity increases due to torque loss and deformation
Solution Approach 1:
By removing the gasket component, the patent eliminates the need for periodic inspection and replacement of degraded sealing elements. The direct contact interface requires no maintenance related to torque retention or gasket condition, significantly improving ease of repair.
Solution Approach 2:
The integrated socket interface maintains its sealing capability throughout its service life without requiring external intervention for torque adjustment or gasket replacement. The design is self-sustaining in terms of sealing performance, reducing maintenance burden.
3Force
If vacuum-induced suction forces are resisted with conventional sealing, then water ingress is attempted to be prevented, but screw torque is lost and deformation occurs
Solution Approach 1:
The patent combines the socket mounting structure with the luminaire housing to create a unified load-bearing interface. This integration distributes the vacuum-induced suction forces across the entire housing-socket interface rather than concentrating them on discrete screws, preventing torque loss and deformation.
Solution Approach 2:
The patent utilizes the housing cavity structure itself as the sealing interface, which can flexibly accommodate vacuum forces without rigid fastening points. The direct contact between the socket and housing creates a compliant sealing surface that resists deformation under suction forces.
Data Source
AI summary
According to certain embodiments, an apparatus comprises a housing including a cavity; a socket disposed in the cavity, wherein the socket makes direct contact with a portion of the housing surrounding the cavity; a surge protector disposed on the socket, wherein the surge protector comprises a male interface plugged into the socket, and female interface; and a photocell plugged into the female interface.