Oval Pressure Cooker Lid Positioning and Locking for First-Try Closure
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Solution Overview
Problem
Existing cooking appliances with oval pressure cookers face difficulties in properly closing the pot lid on the first try due to misalignment, requiring multiple adjustments during operation.
Innovation Solution
A cooking appliance design featuring a pot lid with orthogonal long and short axes, a limiting boss on the pot body to guide and lock the lid, and a pot lid locking assembly with guide rails and snaps to ensure accurate and secure closure, enhancing structural strength and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pot lid is designed without positioning features, then the structure is simple, but the lid cannot be closed accurately on the first try and requires multiple adjustments
Solution Approach 1:
The patent applies preliminary action by providing positioning bosses on the pot lid that correspond to positioning grooves on the pot body before the lid is closed. These positioning features are pre-configured to guide the lid into the correct position during placement, ensuring accurate alignment and closure on the first try without requiring multiple adjustments by the user.
Solution Approach 2:
The patent uses positioning bosses and limiting bosses as intermediary elements between the pot lid and pot body. These intermediaries facilitate the connection by providing tactile and mechanical guidance, allowing the user to easily align and secure the lid without direct complex interaction between the lid and pot body surfaces.
2Manufacturing precision
If multiple limiting bosses are provided on handles, then the lid positioning accuracy is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the positioning function into multiple independent limiting bosses distributed on the handles rather than using a single complex positioning mechanism. Each limiting boss is a simple, standardized component that can be manufactured independently and assembled, improving positioning accuracy through multiple contact points while keeping individual component manufacturing simple.
3Ease of operation
If the inner side surface of the limiting boss is inclined, then the lid guidance is improved, but the manufacturing precision requirement increases
Solution Approach 1:
The patent applies parameter changes by modifying the geometry of the limiting boss inner side surface to have an inclined configuration. This inclination angle parameter is optimized to provide effective guidance during lid closure, creating a self-aligning effect that improves ease of operation. The specific angle parameter is chosen to balance guidance effectiveness with manufacturing feasibility.
Data Source
AI summary
A cooking appliance includes a pot lid having a cross section with a long axis and a short axis orthogonal to each other, a pot body including a limiting boss provided at an upper surface of the pot body and configured to abut against an outer peripheral edge of the pot lid when the pot lid is closed, and a pot lid locking assembly configured to lock the pot lid in a closed state. The pot lid locking assembly includes at least one of a lid locking part disposed at the pot lid or a pot locking part disposed at the pot body.