Articulated Junction Box for Recessed Light Fixture Rotation
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Solution Overview
Problem
In recessed light fixtures, the junction box often inhibits the rotation of the lamp due to its size and weight, preventing free alignment and adjustment of the light emission.
Innovation Solution
A light fixture design featuring a yoke that allows the lamp to rotate 360 degrees, with a junction box that is connected to the yoke and can also pivot, maintaining its orientation relative to the mount during rotation, and includes a rotating support and wire guide to facilitate unhindered rotation and installation/removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the junction box is separated from the remainder of the light fixture, then the lamp can rotate freely, but the wiring becomes complex and may inhibit rotation
Solution Approach 1:
The patent applies the dynamics principle by making the junction box rotatable relative to the mounting structure through a pivotal connection. This allows the junction box to rotate dynamically with the lamp assembly, eliminating the need for complex fixed wiring arrangements and enabling free lamp rotation while maintaining electrical connectivity through the rotating support mechanism.
2Volume of moving object
If the junction box is made large and heavy to house electrical components, then it provides sufficient housing space, but it prevents free rotation and alignment of the lamp
Solution Approach 1:
The patent implements dynamics by enabling the junction box to pivot and rotate relative to the mounting structure. This dynamic capability allows the heavy junction box to be repositioned freely during installation and adjustment, eliminating the constraint that would otherwise prevent proper lamp alignment while maintaining adequate housing volume for electrical components.
Solution Approach 2:
The patent applies segmentation by separating the junction box from the fixed mounting structure and creating an independent rotating support mechanism. This segmentation allows the junction box to be positioned optimally for both housing electrical components and enabling lamp alignment, resolving the contradiction between housing volume and operational ease.
3Reliability
If the junction box is fixed relative to the mounting structure, then it maintains stable electrical connections, but it inhibits rotation of the lamp
Solution Approach 1:
The patent resolves this contradiction by implementing a rotating support mechanism that allows the junction box to pivot relative to the mounting structure. This dynamic design maintains reliable electrical connections through the rotating support while enabling full lamp rotation capability, achieving both stability and adaptability simultaneously.
Data Source
AI summary
A light fixture has a mount to attach the light fixture to a support structure. A yoke is connected to the mount and is operable to rotate relative to the mount at least 360 degrees about a rotation axis passing through an illumination aperture of the light fixture. A lamp is connected to the yoke and is operable to rotate with the yoke about the rotation axis. A proximal end of a junction box is connected to the yoke and is operable to rotate at least 360 degrees relative to the yoke about the rotation axis, to maintain a rotational orientation of the junction box relative to the mount during rotation of the yoke and lamp. The junction box is operable to pivot relative to the yoke, about a pivot axis perpendicular to the rotation axis and to contact the support structure on a distal free end portion.