Meter Box Cover Segmented Design for Tamper Resistance
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Solution Overview
Problem
Existing meter box covers are not tamper-resistant and lack durability, as they can be easily pried out and are structurally weak, failing to effectively block access to electric terminals when the meter is removed.
Innovation Solution
A meter box cover design featuring a first portion that engages the inner surface of the lid and a second portion that extends beyond the opening, preventing displacement and unauthorized access, with a robust and secure locking mechanism using a meter ring and flange configuration for both ringless and ring-style meter boxes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plastic cover with thin metal plate is used to block access to electric terminals, then the cover can prevent unauthorized use of electricity, but the cover can be easily pried out and removed, lacking tamper resistance
Solution Approach 1:
The cover is divided into two distinct portions: a first portion that engages with the lid's inner surface and a second portion that extends beyond the outermost surface. This segmentation allows each portion to perform its specific function - the first portion provides engagement and anchoring while the second portion provides blocking and tamper resistance, resolving the contradiction between ease of installation and tamper resistance.
Solution Approach 2:
The cover design transitions from a traditional flat two-dimensional cover to a three-dimensional structure with portions extending in different directions. The first portion engages inward while the second portion extends outward, creating a multi-dimensional configuration that prevents prying and removal, thereby enhancing tamper resistance without compromising structural integrity.
2Reliability
If a cover design extends through the opening beyond the outermost surface to prevent displacement, then the cover achieves tamper resistance, but the manufacturing complexity increases
Solution Approach 1:
The cover integrates both the engagement function (first portion) and the blocking function (second portion) into a single unified component. This merging eliminates the need for separate parts and assembly steps, maintaining manufacturing simplicity while achieving the desired tamper resistance through the combined structural design.
Solution Approach 2:
The single cover component performs multiple functions: the first portion engages with the lid to prevent removal, while the second portion extends beyond the surface to block access and prevent displacement. This multi-functionality in a single component simplifies manufacturing by eliminating the need for multiple separate parts and their associated assembly processes.
3Reliability
If a robust locking mechanism with meter ring and flange is used for ring-style meter boxes, then the cover achieves secure access and tamper resistance, but the device complexity increases
Solution Approach 1:
The locking mechanism utilizes the existing meter ring and flange components of the meter box itself, rather than requiring entirely separate locking parts. The cover's first portion engages with these pre-existing structural elements, allowing the system to lock securely using the meter box's own components, thereby reducing overall device complexity while maintaining security.
Solution Approach 2:
The cover acts as an intermediary component that connects and utilizes the existing meter ring and flange structures. Rather than creating a completely new locking system, the cover mediates between these existing components to achieve secure access, simplifying the overall locking mechanism by building upon rather than replacing existing structural elements.
Data Source
AI summary
A meter box cover including a first portion that engages an inner surface of an opening in a lid of a meter box to prevent the passage of the cover through the opening and a second portion that extends through the opening and beyond an outermost surface of the opening in the lid of the meter box. The meter cover blocks substantially an entirety of the opening and the second portion prevents the cover from being displaced within the opening.