Adjustable-Depth Electrical Box Assembly for Luminaire Mounting
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Solution Overview
Problem
Conventional electrical box assemblies, particularly with mud rings, are inadequate for mounting lighting devices as they reduce the front opening width, excluding their use with lighting fixtures and other components that require direct coupling to the electrical box, and fail to adjust depth relative to varying support structures, necessitating a solution for adjustable electrical boxes that can couple with lighting devices and adjust depth to match wall or ceiling coverings.
Innovation Solution
An adjustable-depth electrical box assembly featuring an extendable sleeve and electrical box housing with rotatable adjustment fasteners, allowing the sleeve to move between retracted and extended positions to align the front opening with the support structure, coupled with a centerplate for secure mounting, enabling depth adjustment post-installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional electrical boxes with mud rings are used, then depth adjustment relative to support structures is possible, but the front opening width is reduced and lighting devices cannot be directly mounted
Solution Approach 1:
The electrical box is segmented into a housing and a separate extendable sleeve. The sleeve can be extended to provide the necessary depth adjustment while maintaining a full-width front opening, or retracted to allow direct mounting of lighting devices to the housing.
Solution Approach 2:
The extendable sleeve acts as an intermediary component between the electrical box housing and the support structure. It provides the depth adjustment function traditionally requiring a mud ring, while preserving the full front opening width for direct device mounting.
2Adaptability or versatility
If fixed-depth electrical boxes are used, then installation is simple, but adjustment relative to varying support structure depths is not possible
Solution Approach 1:
The electrical box transitions from a fixed-depth design to a dynamic, adjustable-depth design through the extendable sleeve. The sleeve can be extended or retracted using adjustment fasteners, allowing the box to adapt to various support structure depths while maintaining a relatively simple overall structure.
3Ease of operation
If extendable sleeves are added to electrical boxes, then depth adjustment is enabled, but device complexity increases
Solution Approach 1:
The adjustment fasteners are designed to be accessible from the front of the electrical box, allowing users to extend or retract the sleeve themselves after installation without requiring special tools or disassembly. The system serves itself by providing built-in adjustment capability.
Data Source
AI summary
An assembly is provided for adjustable-depth installation of a lighting device relative to a support structure. The assembly can include a centerplate with a plate opening. The assembly can further include an electrical box with an extendable sleeve and an electrical box housing. The extendable sleeve can be slidably received within the electrical box housing and the electrical box housing can be received within the plate opening. The extendable sleeve can have a front opening and the electrical box housing can have a front opening. The extendable sleeve can be movable between a retracted position in which the front openings of the extendable sleeve and the electrical box housing can be spaced outward from the plate opening by a first distance and an extendable position in which the front opening of the extendable sleeve can be spaced outward from the plate opening a second distance larger than the first distance.