Oven Rack Release Mechanism With Anti-Tip Subframe Retention
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Solution Overview
Problem
Conventional oven rack assemblies face difficulties in securely positioning and easily releasing subframes from oven liners, particularly during cleaning and maintenance, and tend to tip when extended, which complicates their manipulation and usage.
Innovation Solution
An oven rack assembly with a slide system and retention/release mechanism that includes flipper mechanisms with retainer tabs and a spring-loaded pin system, allowing for secure positioning and easy release of the subframe from the oven liner, and features non-tipping means to prevent the assembly from tilting during extension and retraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the oven rack assembly uses a fixed connection between the subframe and ladder racks, then the assembly is stable during use, but it cannot be easily released for cleaning and maintenance
Solution Approach 1:
The bracket connection transitions from a fixed static connection to a dynamic releasable connection. The bracket includes a release mechanism with a movable arm that can engage or disengage from the ladder rack, allowing the connection state to change dynamically between secured and released positions based on operational needs.
Solution Approach 2:
The connection system is divided into separable components: the bracket with release mechanism on the subframe, and the corresponding engagement features on the ladder rack. This segmentation allows the connection to be established or broken at will, enabling easy release for cleaning while maintaining stability during use.
2Ease of operation
If the oven rack assembly uses attachable brackets for connection, then it can be released for cleaning, but the subframe may tip away from the horizontal plane during manipulation
Solution Approach 1:
The anti-tip feature provides a preliminary counteracting force against the tipping tendency of the subframe. The anti-tip arm engages with the anti-tip feature on the ladder rack to prevent the subframe from rotating or tilting away from the horizontal plane during manipulation, addressing the stability issue before it occurs.
3Ease of operation
If the release mechanism is made simple for easy operation, then cleaning and maintenance become easier, but the mechanism may not provide sufficient retention force to hold the subframe securely
Solution Approach 1:
The release mechanism utilizes spring-loaded arms with curved engagement surfaces that provide mechanical advantage. The spring force automatically applies sufficient retention force to hold the subframe securely, while the curved geometry allows smooth engagement and disengagement with minimal manual force, balancing retention strength with ease of operation.
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 enables secure retention and easy release of the subframe, preventing unwanted movement and tipping, thereby enhancing user convenience and safety during oven rack manipulation.
Implementation Method 1
a spring-loaded pin system, allowing for secure positioning and easy release of the subframe from the oven liner
Data Source
AI summary
An oven rack assembly (2000) can be used with an oven (128′) having sets of liner ribs (1004). The oven rack assembly (2000) includes an oven rack (208), slide system (2018) and subframe (2040). The oven rack assembly (2000) also includes a retention/release assembly (2060) for facilitating retention of a position of the subframe (2040) onto liner ribs (2004) and for facilitating release of the subframe (2040) when a user wishes to remove or move the assembly (2000) from the oven. Attachment plates (2065) can also be included, with the plates (2065) mounted to side stampings (2022). The oven rack assembly (2000) also includes protruding forms (2122) on the subframe (2040) which interact with forms (2124) positioned along the liner ribs (2004) to prevent tipping of the subframe (2040) when the oven rack (2008) is moved to an extended position.