Oven rack assemblies with release mechanisms and catches
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Solution Overview
Problem
Conventional oven rack assemblies face difficulties in maintaining the subframe stationary during extension and retraction, as it tends to tip away from the horizontal plane, and there is a need for a mechanism to release the coupling between the subframe and oven liners for cleaning and maintenance.
Innovation Solution
The oven rack assembly features a slide system with retention/release means, including lever-operable tab mechanisms and retention springs, which allow the subframe to be maintained stationary and easily released from the oven liner sides, and rearwardly positioned catches to prevent tipping and facilitate sliding movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the subframe is coupled to the slide system without retention/release means, then the structure is simpler, but the subframe cannot be easily released for cleaning and maintenance
Solution Approach 1:
The retention means includes a movable tab that can transition between engaged and disengaged positions, allowing the coupling mechanism to dynamically change from locked to released state. This enables easy release for maintenance while maintaining structural integrity during normal operation.
Solution Approach 2:
The retention/release mechanism is segmented into separate components (tab, lever, spring) that can independently function. The tab engages with the liner side, the lever provides manual operation, and the spring provides retention force, allowing the system to be maintained through individual component replacement if needed.
2Stability of the object's composition
If the subframe is positioned without rearwardly positioned catches, then the structure is simpler, but the subframe tips away from the horizontal plane during extension and retraction
Solution Approach 1:
The rearwardly positioned catches are designed to preemptively prevent the subframe from tipping by engaging with the oven cavity rear wall before tipping can occur. The catches create a physical barrier that counteracts the tipping force generated during extension and retraction movements.
Solution Approach 2:
The catches extend in the rearward direction (depth dimension) from the subframe, creating a three-dimensional engagement structure. This rearward extension allows the catches to engage with the oven cavity rear wall, adding a depth-based constraint that prevents tipping in the vertical plane.
3Reliability
If retention springs are used to maintain the tab in the engaged position, then the subframe remains securely retained, but the mechanism requires more components
Solution Approach 1:
The retention spring automatically maintains the tab in the engaged position with the liner side without requiring external intervention. The spring continuously applies force to keep the coupling secured during normal operation, providing self-service retention that enhances reliability while keeping the mechanism simple.
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
The solution ensures stable operation of the oven rack assembly by maintaining the subframe stationary during extension and retraction, preventing tipping, and allowing easy release for maintenance, enhancing user convenience and safety.
Implementation Method 1
retention springs, which allow the subframe to be maintained stationary and easily released from the oven liner sides
Implementation Method 2
lever-operable tab mechanisms and retention springs, which allow the subframe to be maintained stationary and easily released from the oven liner sides
Data Source
AI summary
An oven rack assembly (1000) includes an oven rack (1008) and a slide system (1018). The slide system (1018) includes slide devices (1020) positioned at opposing sides of the oven rack (1008). A subframe (1040) is positioned below the slide devices (1020). Retention/release devices (1062) are mounted on the slide devices (1020) and are manually operable by a user so as to selectively retain the subframe (1040) in a stationary position or, alternatively, release the subframe (1040) so that the subframe (1040) can be removed from the oven (128′).