Retractable Pressure Cooker Lid Linkage for Stable Lever Return
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Solution Overview
Problem
Existing pressure cooking appliances with retractable lids suffer from mechanical linkage issues that lead to violent lever return, making them unsafe and uncomfortable to use, as well as requiring increased force to close the lid due to elastic return forces during deformation.
Innovation Solution
A pressure cooking appliance with a retractable lid where the attachment zone is movable relative to the control means, allowing for a degree of translation, which helps in stabilizing the lever movement and reducing the force required to close the lid by using a guide path to stop the lever's return motion effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a mechanical linkage is used to control lid movement, then the lid can be closed effectively, but the lever returns violently to its open position
Solution Approach 1:
The attachment zone is made movable relative to the control means, allowing dynamic adjustment during operation. The guide path enables the attachment zone to translate and follow a controlled trajectory, transforming the rigid mechanical linkage into a dynamic system that can absorb and control the lever's return motion, preventing violent reactions
Solution Approach 2:
The guide path acts as an intermediary element between the control means and the lid. It mediates the interaction by constraining the attachment zone's movement to a specific path, controlling the force transmission and preventing direct violent transfer of the lever's return force to the lid
2Reliability
If the lid is deformed to achieve hermetic closure, then sealing is improved, but the force required to close the lid increases
Solution Approach 1:
The movable attachment zone with guide path creates a dynamic force transmission system. As the lid deforms during closing, the guide path allows the attachment zone to translate and follow a trajectory that optimizes force application, reducing the peak closing force required while maintaining effective sealing through controlled deformation
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 safety and ease of use by preventing violent lever return and reducing the force needed to close the lid, improving ergonomics and user comfort.
Implementation Method 1
a cover capable of passing, under the effect of a mechanical stress in bending, from a geometric configuration at rest allowing the introduction of the cover into the tank, to a deformed geometric configuration making it possible to achieve the hermetic closure of the tank
Data Source
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AI summary
The invention relates to a pressure cooker device (1) with a fitting lid, comprising at least : one pan (2) and a lid (3) designed to fit in the pan (2) with a simple movement between at least a closed position in which said lid forms an essentially sealed cooking chamber with the pan (2) and an open position in which communication of the interior of the chamber with the exterior is possible, a control means (5) for moving the lid (3) between the open and closed positions thereof, the lid (3) being suspended on the control means (5) in a connecting zone (P), said device (1) being characterised in that the connecting zone (P) may move relative to the control means (5). The invention further relates to pressure cooking devices.