Adjustable Variable Ring Ratchet Mechanism for Wall Thickness
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Solution Overview
Problem
Conventional electrical junction boxes require time-consuming and often inaccurate adjustments due to varying wall thicknesses, leading to high installation costs and difficulties in accommodating different wall finishes, especially during remodeling or future construction.
Innovation Solution
An adjustable variable ring (AVR) with a ratchet mechanism that allows for quick and precise adjustment to fit different wall thicknesses, featuring a sliding insert and ratchet plate system that locks into place, reducing the need for multiple plaster ring sizes and simplifying installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional fixed plaster rings are used, then manufacturing and installation are simple, but they cannot accommodate different wall thicknesses and require multiple sizes
Solution Approach 1:
The plaster ring is transformed from a fixed structure to a dynamically adjustable one. The sliding insert mechanism allows the ring to change its effective diameter by sliding the insert in or out, enabling the same ring to accommodate multiple wall thicknesses. This dynamic adjustment eliminates the need for multiple fixed-size rings.
Solution Approach 2:
The plaster ring is divided into multiple components: a base ring, a sliding insert, and adjustment mechanisms (screws or cam). This segmentation allows independent adjustment of each component to achieve the desired fit for different wall thicknesses while maintaining overall structural integrity.
2Adaptability or versatility
If adjustable plaster rings with screws are used, then adaptability to different wall thicknesses is improved, but installation time increases and adjustment accuracy decreases
Solution Approach 1:
The traditional screw-adjustment mechanism is replaced with a cam-based adjustment system. The cam mechanism provides mechanical advantage, allowing the installer to quickly adjust the ring diameter with a simple leveraging motion rather than threading screws, significantly reducing installation time while maintaining precision.
Solution Approach 2:
The adjustment mechanism is designed to be self-aligning and self-locking. Once the desired diameter is achieved through the cam adjustment, the mechanism automatically locks in place, eliminating the need for precise manual positioning and reducing installation time while ensuring accurate fit.
3Adaptability or versatility
If multiple sizes of plaster rings are maintained for different wall thicknesses, then adaptability is improved, but inventory complexity and cost increase
Solution Approach 1:
A single universal plaster ring design with an adjustable diameter mechanism can replace multiple fixed-size rings. The ring can be adjusted to fit various wall thicknesses within a specified range, eliminating the need to stock multiple sizes and reducing inventory complexity while maintaining full adaptability.
4Ease of operation
If conventional plaster rings are used during remodeling, then installation is straightforward, but removal and future construction becomes costly and difficult
Solution Approach 1:
The adjustable plaster ring's segmented design allows for easy disassembly during remodeling. The sliding insert and adjustment mechanisms can be quickly removed or repositioned without damaging the wall or requiring extensive demolition, making future construction and remodeling significantly easier compared to fixed rings.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The AVR significantly reduces installation time to mere seconds, accommodates various wall thicknesses, and eliminates the need for multiple plaster ring sizes, enhancing efficiency and cost-effectiveness by allowing for quick and accurate adjustments to fit flush with the wall surface.
Implementation Method 1
a ratchet mechanism having: a ratchet plate secured to the base frame by an inner surface of the ratchet plate, and including a plurality of steps on an outer surface, and a ratchet spring installed on an inner wall of the box shaped frame
Implementation Method 2
a ratchet spring installed on an inner wall of the box shaped frame and having a first end and a second end, ratchet spring including an angled end tab at the first end, an angled mid tab between the first end and the second end
Data Source
AI summary
An adjustable variable ring for electrical junction boxes including a base frame having a guide tab, a sliding insert having a box shaped frame, the sliding insert being configured to slide in and out of the base frame. A ratchet mechanism having a ratchet plate on the base frame including a plurality of steps, and a ratchet spring installed on an inner wall of the box shaped frame including an angled end tab and an angled mid tab protruding from the box shaped frame for engaging one or more of the plurality of steps. The sliding insert is configured to slide in and out of the base frame by disengaging the mid tab from the one or more of the steps by pressing on the end tab, and locks in the base frame by engaging the mid tab with the one or more of the steps.