Adjustable Lighting Assembly with Telescoping Hangar Bars

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Solution Overview

Problem

Traditional recessed lighting systems are bulky due to separate mounting of a junction box and a can for the driver and light source module, making adjustments and serviceability difficult and costly.

Innovation Solution

A unified compact recessed lighting system with a junction box housing both the driver and light source module, coupled to hangar bars, allowing for adjustable positioning and reduced bulk through telescoping hangar bars and friction-locking mechanisms.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate mounting of junction box and can is used, then driver and light source module are electrically isolated, but system bulk increases and adjustability decreases

Engineering Contradiction:
Improveelectrical isolationVSAvoidsystem bulk
Core Design Contradiction:
ReliabilityVSVolume of moving object

Solution Approach 1:

The patent combines the junction box and can into a single integrated housing unit, eliminating the need for separate mounting of these components. This merging reduces overall system bulk while maintaining electrical isolation through internal partitioning within the unified housing, directly resolving the contradiction between electrical isolation reliability and system compactness.

Inventive Principle:
Principle #5Merging (Combining)

2Reliability

If separate mounting of junction box and can is used, then electrical isolation is maintained, but serviceability becomes difficult and costly

Engineering Contradiction:
Improveelectrical isolationVSAvoidserviceability
Core Design Contradiction:
ReliabilityVSEase of repair

Solution Approach 1:

The integrated housing contains internally segmented compartments that separately house the driver and light source module while maintaining electrical isolation. This segmentation allows independent access and serviceability of each component through the unified housing, making maintenance easier and more cost-effective while preserving electrical isolation requirements.

Inventive Principle:
Principle #1Segmentation

3Ease of manufacture

If fixed positioning is used, then installation is straightforward, but adjustments are difficult and costly

Engineering Contradiction:
Improveinstallation simplicityVSAvoidadjustability
Core Design Contradiction:
Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent incorporates adjustable positioning mechanisms within the integrated housing that allow the light source module and driver to be repositioned after installation. This dynamic adjustability enables straightforward initial installation followed by easy adjustments when needed, resolving the contradiction between installation simplicity and future adaptability.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS11028982B2Adjustable lighting assembly with hangar bars
Publication Date: 2021.06.08 DMF INC
  • US11028982B2 patent drawing
  • US11028982B2 patent drawing
  • US11028982B2 patent drawing

AI summary

A recessed lighting installation assembly includes a junction box having a cavity to contain a lighting system together with electrical wires from an electrical system of a building for connection to the lighting system. The assembly also includes a plurality of telescoping hangar bars coupled to the junction box to hold the junction box in a gap between a plurality of beams in the building. Each telescoping hangar bar is extendible and/or retractable to vary a length of the bar between the plurality of beams to meet the gap between the plurality of beams. A position of the junction box is adjustable along the length of each telescoping hangar bar between the plurality of beams. In one example, the recessed lighting installation assembly does not include a can, separate from the junction box, to contain the lighting system.