Oven Sliding Shelf Linkage for Safer Food Handling Clearance
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Solution Overview
Problem
Existing oven sliding shelf systems face challenges in easy food insertion and removal due to aligned shelf movement and potential user burns from hot shelves, as both shelves travel the same linear distance when the door is opened, leading to limited clearance and increased risk of contact with hot surfaces.
Innovation Solution
The system introduces a vertical rod on the lower shelf that interacts with an engagement element and stop on the upper shelf, allowing offset horizontal motion, enabling the upper shelf to remain stationary during door opening, thus providing increased clearance for easier food insertion and removal, and allowing the lower shelf to move independently, reducing the risk of user burns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If both shelves travel the same linear distance when the door is opened, then the shelf system maintains simple aligned movement, but the clearance for food insertion is limited and user burn risk increases
Solution Approach 1:
The shelf system is divided into two independently controllable shelves (upper shelf 161 and lower shelf 160), each capable of different movement behaviors. The lower shelf is connected to the door via rods to move with door opening/closing, while the upper shelf can remain stationary or move independently, allowing selective optimization of clearance without requiring complete redesign of the entire shelf system.
Solution Approach 2:
The system introduces dynamic control where the upper shelf's movement is not fixed but can be adjusted based on operational needs. During door opening, the upper shelf can remain stationary while the lower shelf moves, creating variable clearance dynamically rather than maintaining a fixed aligned movement pattern for both shelves.
2Object-affected harmful factors
If the upper shelf moves with the door opening, then the shelf system maintains consistent movement pattern, but the risk of user burns from hot shelves increases
Solution Approach 1:
The shelf system separates the movement control of the upper and lower shelves, allowing the upper shelf (which may be hot) to remain stationary while the lower shelf moves with door opening. This segmentation enables selective movement to minimize user exposure to hot surfaces while maintaining functional operation.
Solution Approach 2:
The lower shelf acts as an intermediary element that moves with the door while the upper shelf remains stationary. This intermediary movement pattern creates protective spacing between the user's hand (inserting food) and the potentially hot upper shelf, reducing burn risk without requiring direct control of the upper shelf movement.
3Ease of operation
If the upper shelf remains stationary during door opening, then clearance for food handling is improved, but the shelf system requires independent movement control
Solution Approach 1:
The shelf system is segmented into independently controllable units where the upper shelf can be decoupled from door movement. This allows the upper shelf to remain stationary during door opening while the lower shelf moves, creating enhanced clearance for food handling without requiring complex coordinated control of both shelves.
Solution Approach 2:
The system implements dynamic movement control where the upper shelf's position can be held fixed during door opening operations, and then moved or adjusted subsequently. This dynamic control allows optimization of clearance during critical food handling moments while maintaining flexibility for other operational requirements.
4Productivity
If both shelves are aligned during closure, then the shelf system maintains simple positioning, but the operational efficiency is reduced
Solution Approach 1:
The shelf system employs dynamic positioning where shelves can be independently positioned at different locations rather than requiring strict alignment. During closure, the upper shelf can be positioned optimally for the specific cooking task while the lower shelf follows door movement, enabling faster setup and more flexible operation compared to rigid aligned positioning.
Solution Approach 2:
By segmenting the shelf control system, each shelf can be independently positioned to optimize operational efficiency for different cooking scenarios. The upper shelf can be placed at the ideal height for specific dishes while the lower shelf moves with the door, creating a more efficient workflow without requiring complex coordinated positioning of both shelves.
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
This design enhances user safety by providing greater clearance for easier food handling and reduces the risk of burns by allowing the upper shelf to be removed without resistance, while maintaining alignment during closure, thus improving the operational efficiency of oven shelf systems.
Implementation Method 1
the lower shelf is provided with a vertical rod; and the lower shelf includes an engagement element and a stop horizontally distant from said engagement element, and said vertical rod of said lower shelf mechanically interacts with said engagement element and with said stop
Implementation Method 2
said engagement element includes a fixed lever pivotable around a shaft, having one end projecting downwardly in relation to the upper shelf and the other projecting horizontally and supported on a support point at the rear of the shelf
Data Source
AI summary
Systems of sliding shelves for ovens are provided. The system includes a lower shelf and an upper shelf. The lower shelf includes a vertical rod; and the upper shelf includes an engagement element, and a stop horizontally distant from said engagement element. The vertical rod of the lower shelf mechanically interacts with the engagement element and with the stop.