Retractable Pressure Cooker Lid Control for Safe Locked Handling
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Solution Overview
Problem
Existing pressure cooking appliances have a central handle that serves as both a locking/unlocking mechanism and a grip, making it inconvenient for storage, washing, and posing safety risks due to the risk of lifting the entire device by the lid, which can lead to mechanical stress and slipping.
Innovation Solution
A pressure cooking appliance with a control member that moves between a deployed and retracted position, where the deployed position provides a secure grip for handling the lid and the retracted position is difficult to grasp, preventing the lid from being lifted by the handle, thus ensuring safe and ergonomic use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the central handle is made large to provide sufficient grip for manipulating the lid, then the ease of operation is improved, but the device complexity and storage convenience deteriorate due to the protrusion occupying space and being inconvenient for washing
Solution Approach 1:
The control member is designed to move between a retracted position (when the lid is locked) and a deployed position (when the lid is unlocked). When deployed, it provides a large grip surface for easy manipulation. When retracted, it minimizes protrusion for compact storage and easy washing, thus resolving the contradiction between ease of operation and device complexity.
2Ease of operation
If the central handle is used to lift the lid, then the ease of operation is improved, but the safety deteriorates because the user may lift the entire device including the tank, causing mechanical stress and slipping
Solution Approach 1:
The control member's position dynamically indicates the operational state: when deployed, it invites handling for lid manipulation; when retracted, it signals that the lid is locked and should not be lifted. This dynamic positioning provides visual and tactile feedback to prevent unsafe lifting operations.
Solution Approach 2:
The design preemptively prevents unsafe actions by making the control member difficult to grasp when the lid is locked (retracted position). This preliminary design feature stops users from attempting to lift the entire device before they even realize the danger, thus preventing mechanical stress and slipping accidents.
3Ease of operation
If the control member is always accessible for gripping, then the ease of operation is improved, but the safety deteriorates due to the constant temptation to lift the locked device
Solution Approach 1:
The control member transitions between accessible (deployed) and inaccessible (retracted) states based on the lid's locking status. This dynamic accessibility ensures that the handle is only easily graspable when it is safe to do so, eliminating the constant temptation to lift locked devices while maintaining ease of operation when unlocked.
Data Source
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AI summary
- The invention relates to an appliance (1) for cooking food under pressure comprising a tank (2), a lid (3) and a locking/unlocking control member (6), characterized in that it comprises a plate (10) attached to the cover (3) and on which said control member (6) is pivotally mounted between a deployed position and a retracted position, said apparatus (1) also comprising a cover mounted on the plate (10) for hide the control mechanism. - Apparatus for cooking food under pressure.