Door for mounting a removable electronic display
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Solution Overview
Problem
Existing refrigerated enclosure doors lack efficient maintenance and power control solutions, making it difficult to replace electronic displays without removing the entire door and risking uneven shear loading, and do not provide adequate protection against inadvertent power cycling.
Innovation Solution
The implementation of a display case door with a lift-off hinge mechanism, a circuitry module, and a quick disconnect power connection, allowing for easy replacement and maintenance of electronic displays, along with local power controls to prevent inadvertent power cycles, and accommodating different door sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If electronic displays are mounted to the door frame using traditional fixed mounting methods, then the display is securely attached, but replacement requires removing the entire door and risks uneven shear loading
Solution Approach 1:
The mounting mechanism is segmented into separate components: a hinge assembly with mounting brackets that attaches to the door frame, and a separate display unit that connects to the hinge. This segmentation allows the display to be independently removed and replaced without taking down the entire door assembly, resolving the contradiction between ease of repair and device complexity.
Solution Approach 2:
The hinge assembly provides dynamic mounting capability, allowing the display to be easily detached and reattached. The hinge mechanism enables controlled movement and positioning during installation while maintaining secure attachment during operation, facilitating simple display replacement without requiring complete door removal.
2Ease of repair
If power connections are permanently wired to the door frame, then electrical connection is reliable, but maintenance requires door removal and power cycling risks occur
Solution Approach 1:
The power connection system is segmented into a permanent power source attached to the door frame and a detachable power cable connected to the display. This allows the power source to remain reliably mounted while the cable can be easily disconnected for maintenance, resolving the contradiction between maintenance ease and connection reliability.
Solution Approach 2:
A detachable power cable acts as an intermediary between the permanent power source and the display. This intermediary component provides reliable electrical connection during operation while enabling easy disconnection for maintenance, eliminating the need for door removal and preventing inadvertent power cycling.
3Ease of operation
If the entire door assembly is removed for display replacement, then complete access is achieved, but installation time and labor increase
Solution Approach 1:
The door assembly is segmented into the door frame, hinge mounting mechanism, and display unit. This segmentation enables independent access to the display through the hinge connection point, allowing replacement without removing the entire door and significantly reducing maintenance time.
Solution Approach 2:
The display unit is extracted as a separate removable component through the hinge mounting system. This extraction allows the display to be taken out and replaced independently while the door frame and other components remain in place, eliminating the time loss associated with complete door removal.
4Strength
If heavy electronic displays are mounted directly to the door frame, then secure attachment is achieved, but uneven shear loading and structural stress occur
Solution Approach 1:
The mounting system is segmented into multiple mounting brackets distributed across the hinge assembly and door frame. This segmentation distributes the weight and shear loads of heavy displays across multiple attachment points, preventing concentrated stress on any single location of the door frame while maintaining strong attachment.
Solution Approach 2:
The hinge assembly acts as an intermediary mounting structure between the heavy display and the door frame. This intermediary component absorbs and distributes the mechanical loads, protecting the door frame from direct shear loading while providing secure attachment for the display.
Data Source
AI summary
In one general aspect, the subject matter described in this specification can be embodied in a display case door that includes an insulated panel assembly that is transparent to visible light. The door further includes a door frame extending about and secured to a peripheral edge of the insulated panel assembly, an electronic display overlaying the insulated panel assembly, and at least one lift-off hinge including a first hinge component attached to a longitudinal side of the door frame, and a second hinge component coupled to the electronic display.