Hidden Removable Hinge Pin for Secure Enclosure Access
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Solution Overview
Problem
Removable hinges in electrical enclosures pose a security risk due to potential unauthorized access when disassembled, while existing designs are either non-removable or difficult to manufacture and maintain.
Innovation Solution
A hinge apparatus with a hinge body comprising a first and second knuckle portion that defines a tubular opening, featuring a recess and an offset gripping portion on the hinge pin, which inhibits access when closed but allows removal without tools when opened, ensuring tamper-proof security and ease of manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a removable hinge design is used to facilitate door removal for maintenance and installation, then ease of operation is improved, but security deteriorates due to unintended access through individual disassembly
Solution Approach 1:
The hinge pin is segmented into two functional portions: an axial portion that receives the tubular opening for hinge operation, and a gripping portion that is offset and receives the recess for removal. This segmentation allows the hinge to provide both security during closed operation and ease of removal when needed, resolving the contradiction between security and ease of operation.
Solution Approach 2:
The recess in the hinge body acts as an intermediary mechanism that controls access to the gripping portion. When the hinge is closed, the recess is not accessible, preventing unauthorized removal. When the hinge is opened, the recess becomes accessible, allowing authorized removal. This intermediary structure resolves the security versus ease of removal contradiction.
2Ease of operation
If the gripping portion is made accessible for easy removal, then ease of operation is improved, but security deteriorates as unauthorized access becomes possible
Solution Approach 1:
The hinge body is designed with a recess that is preliminarily positioned to block access to the gripping portion when the hinge is closed. This preliminary blocking action prevents unauthorized removal attempts before they can occur, while still allowing easy removal when the hinge is properly opened and the recess becomes accessible.
3Reliability
If a secure hinge design is implemented to prevent disassembly, then security is improved, but ease of manufacture deteriorates
Solution Approach 1:
The hinge pin has different local qualities: the axial portion is designed for structural integrity and receiving the tubular opening, while the gripping portion is designed with offset positioning to engage the recess. This local differentiation provides security where needed while maintaining manufacturing simplicity through standard machining operations.
Data Source
AI summary
Embodiments of the invention provide a hinge apparatus that can include a hinge body having a first portion and a second portion and a hinge pin. The hinge pin can include an axial portion and a gripping portion. The hinge body can include a recess in one of the first portion and the second portion. The recess in the hinge body can receive the gripping portion of the hinge pin to inhibit access to the gripping portion when the hinge body is in the closed position. The gripping portion can be removed from the recess as the hinge body is moved to the open position.