Adjustable Electrical Box Assembly for Precise Depth Alignment
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Solution Overview
Problem
Existing electrical boxes are difficult to install at varying depths relative to building structures due to misalignment of housing and sleeve tabs, leading to issues like stripped fasteners and improper extension, which can be costly and time-consuming.
Innovation Solution
An adjustable-depth electrical box assembly with integrally formed housing tabs and an extendable sleeve, secured by fasteners, allows for precise alignment and adjustment using cover plates to cover manufacturing holes, ensuring accurate extension and reducing interference with conductors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional electrical boxes with separate housing and sleeve tabs are used, then assembly flexibility is reduced, but manufacturing complexity increases due to alignment issues and stripped fasteners
Solution Approach 1:
The housing tabs and sleeve tabs are merged into a single integrated tab structure that extends from the housing sidewall. This integration eliminates alignment issues between separate components and prevents fastener stripping by providing a unified attachment point, thereby reducing manufacturing complexity while maintaining assembly flexibility.
Solution Approach 2:
The integrated tabs serve multiple functions: they provide structural support for the housing, enable adjustable depth positioning through the extendable sleeve, and serve as mounting points for fasteners. This multi-functionality reduces the number of separate components needed, simplifying manufacturing while maintaining versatility in installation configurations.
2Manufacturing precision
If integrally formed housing tabs are used, then alignment precision improves, but manufacturing process complexity increases
Solution Approach 1:
The housing tabs are formed as an integral part of the housing sidewall through stamping or molding operations. This integration ensures precise alignment between the tabs and the housing structure, eliminating the need for separate tab components and complex assembly procedures, thereby improving alignment precision without significantly increasing manufacturing process complexity.
3Adaptability or versatility
If extendable sleeve with adjustment fastener is used, then depth adjustability improves, but device complexity increases
Solution Approach 1:
The electrical box is divided into a housing portion and an extendable sleeve portion that can be independently positioned. The sleeve can extend or retract relative to the housing to achieve different depths, while the adjustment fastener secures the sleeve at the desired position. This segmentation provides depth adjustability while keeping the overall device structure relatively simple.
Solution Approach 2:
The extendable sleeve is designed to be dynamically adjustable relative to the housing, allowing the electrical box depth to be modified after installation. The adjustment fastener enables the sleeve to be secured at various positions along its travel range, providing dynamic adaptability without requiring a completely complex mechanism.
4Reliability
If cover plates are used to close manufacturing holes, then safety and aesthetics improve, but assembly time increases
Solution Approach 1:
The cover plates are designed to be installed during the initial assembly process, covering the manufacturing holes created by stamping the housing tabs. By addressing the hole coverage requirement during assembly rather than as a separate step, the patent improves safety and aesthetics without significantly increasing overall assembly time.
Data Source
AI summary
An assembly for an adjustable-depth electrical box can include a housing with outer sidewalls that slidably receive an extendable sleeve. A first housing tab may extend integrally from a first outer sidewall. A first hole may be disposed in the first outer sidewall, adjacent the first housing tab, and a first cover may close the first hole. An extendable sleeve including sleeve walls and a first sleeve tab may be provided. The outer sidewalls may slidably receive an extendable sleeve. An adjustment fastener may extend through the first housing tab and may be rotatable to adjust a depth of the extendable sleeve relative to the housing.