Pressure Cooker Lid Locking Assembly for Forced-Open Failure
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Solution Overview
Problem
Conventional electric pressure cookers are prone to lid opening failures and damage due to forced opening, which can lead to deformation or stripping of the open-prevention sliding plate and protective coating, compromising safety and functionality.
Innovation Solution
A pressure cooker design featuring an open-prevention assembly with a sliding block and locking sliding block mechanism, where the locking sliding block engages with cooker teeth to prevent lid opening in case of deformation or damage, ensuring safe operation by locking the lid assembly even if the open-prevention sliding block is compromised.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional open-prevention sliding plate mechanism is used, then the lid can be prevented from opening under normal pressure conditions, but the sliding plate can be easily deformed or damaged during forced opening operations
Solution Approach 1:
The open-prevention assembly is divided into multiple independent components: the open-prevention sliding block with push rod, and the locking sliding block with latch rod. This segmentation allows each component to have specialized functions - the sliding block handles normal operation while the locking block provides backup protection, distributing the mechanical stress and preventing single-point failure
Solution Approach 2:
The locking sliding block and latch rod are pre-positioned to engage with the cooker tooth before any deformation or damage occurs. This backup mechanism is ready in advance to prevent lid opening if the primary sliding block fails, cushioning against the harmful effects of forced opening before they can compromise safety
2Ease of operation
If the open-prevention sliding block is designed to slide freely during lid rotation, then ease of operation is improved, but the protective coating on the cooker rim can be stripped off or destroyed
Solution Approach 1:
The push rod acts as an intermediary between the open-prevention sliding block and the cooker tooth. Instead of the sliding block directly contacting and potentially damaging the cooker rim coating, the push rod transmits the sliding motion force to the cooker tooth, protecting the protective coating while enabling smooth operation
3Device complexity
If a single open-prevention sliding block is used, then device complexity is reduced, but reliability is compromised when the sliding block is deformed or damaged
Solution Approach 1:
Different parts of the open-prevention assembly have specialized local qualities - the open-prevention sliding block is designed for smooth sliding operation with the push rod, while the locking sliding block is designed for secure engagement with the latch rod and cooker tooth. This local specialization allows each component to excel at its specific function while providing overall system reliability
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 effectively prevents accidental or forced opening of the lid, maintaining safety and functionality by ensuring the lid assembly remains locked during high pressure, even if the open-prevention sliding block is deformed or damaged, thus enhancing the reliability and safety of the pressure cooker.
Implementation Method 1
a presence of sufficient pressure in the cooking chamber will cause the open-prevention float device to rise to a position so as to prevent the sliding movement of the open-prevention sliding block
Data Source
AI summary
A pressure cooker comprises a main body, a lid assembly, and an open-prevention assembly disposed on the lid assembly. The main body comprises a cooker rim and a cooker tooth extending therefrom, the open-prevention assembly comprises an open-prevention sliding block and a float device disposed on the lid assembly. With no pressure in the cooking chamber, rotating the lid will cause sliding movements of the open-prevention sliding block. With pressure in the cooking chamber, the float device will rise to prevent the open-prevention sliding block from sliding, thereby preventing the rotation of the lid. The open-prevention assembly comprises a locking sliding block coupled to the open-prevention sliding block. When a forced opening of the lid causes a deformation of the open-prevention sliding block, the locking sliding block lockingly engages the cooker tooth to prevent lid rotation, thereby ensuring safe use of the cooker.