Adjustable Mud Ring Assembly Indexing Screw Positioning
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Solution Overview
Problem
Existing adjustable mud rings are costly to manufacture and difficult to use or assemble, failing to effectively address the need for easy and repeatable positioning of electrical devices in compliance with building codes.
Innovation Solution
An adjustable mud ring assembly comprising a base plate with a junction box connecting portion, a support connecting portion, and a stationary ring, utilizing an indexing screw to move the movable ring between retracted and extended positions, ensuring proper placement and preventing protrusion into the junction box, while allowing for easy assembly and compliance with electrical codes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If adjustable mud rings are designed to allow movement between retracted and extended positions, then adaptability is improved, but device complexity increases
Solution Approach 1:
The mud ring is designed with a movable ring that can be adjusted between retracted and extended positions relative to the stationary ring. The indexing screw enables dynamic positioning while maintaining structural simplicity through a straightforward mechanical adjustment mechanism.
Solution Approach 2:
The mud ring assembly is divided into distinct components: a stationary ring, a movable ring, and an indexing screw. This segmentation allows independent adjustment of the movable ring while keeping the overall structure simple and manageable.
2Adaptability or versatility
If the movable ring is allowed to extend fully, then adaptability is improved, but the risk of protruding into the junction box increases
Solution Approach 1:
The indexing screw mechanism is designed to prevent the movable ring from extending beyond a safe position that would cause protrusion into the junction box. The screw threads and engagement features create a mechanical stop that anticipates and prevents harmful protrusion before it occurs.
Solution Approach 2:
The indexing screw acts as an intermediary mechanism between the movable ring and the stationary ring, controlling the extension movement and ensuring it does not exceed the safe limit. This intermediary component mediates the extension action to prevent harmful effects.
3Ease of manufacture
If traditional mud rings are used without adjustment capability, then manufacturing simplicity is maintained, but adaptability to different wall depths is lost
Solution Approach 1:
The mud ring transitions from a fixed design to a dynamic adjustable design, where the movable ring can be positioned at different depths. This dynamic capability allows a single standardized component to adapt to various wall depths without requiring multiple specialized parts.
Solution Approach 2:
The adjustable mud ring assembly serves multiple functions: it can be used with different wall depths, different junction box positions, and different electrical device configurations. This multi-functionality replaces the need for multiple specialized mud ring variants.
Data Source
AI summary
An adjustable mud ring assembly is provided that includes a base plate, a movable ring, and an indexing screw con-figured to move the movable ring with respect to the base plate between a first position and a second position. The base plate has a junction box connecting portion, a support connecting portion, and a stationary ring. The base plate can have an offset distance (D2) between the junction box connecting portion and the sup-port connecting portion where the offset distance is sufficient to allow the movable ring to move into stationary ring to the first position without protruding, at a lowermost point, into a junction box connected to the junction box connecting portion.