Cooking Vessel Lid Locking with Rotating Arc Clamp Under Pressure
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Solution Overview
Problem
Kitchen appliances with lids face challenges in securely locking the lid during high-pressure cooking processes, as existing solutions often require significant force to maintain the seal and prevent the lid from being lifted by pressure increases or liquid columns.
Innovation Solution
A wave-like locking part with a circular arc-like over-engaging portion is designed to accommodate the vessel rim and lid edge, allowing for a positive-fit locking mechanism that can be actuated by low forces, and is rotatably mounted for easy operation, either manually or via an electric motor, ensuring the lid remains sealed even under pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional locking mechanism is used to secure the lid against high pressure, then the lid can be locked, but significant force is required to actuate the locking mechanism
Solution Approach 1:
The locking part features a circular arc-like over-engaging portion that matches the curvature of the vessel rim and lid edge. This curved geometry enables the locking part to engage smoothly with the mating surfaces, distributing forces along the arc rather than at a single point, thereby reducing the actuation force required while maintaining secure locking under high pressure
Solution Approach 2:
The locking mechanism transitions from a linear engagement to a three-dimensional arc-shaped engagement. The cavity in the locking part extends over the axial length and provides a circular arc-like over-engaging portion that accommodates both the vessel rim and lid edge simultaneously in a positive-fit manner, creating a multi-point contact that reduces required actuation force
2Reliability
If a secure locking mechanism is implemented to prevent lid lifting under pressure, then the seal is maintained, but the device complexity increases
Solution Approach 1:
The locking part is designed as a separate, rotatably mounted component that can be independently actuated. This segmentation allows the locking function to be isolated from the main vessel and lid structures, simplifying the overall design while ensuring reliable sealing through dedicated locking engagement
Solution Approach 2:
The locking part is rotatably mounted, allowing it to move between a locked position where it engages the vessel rim and lid edge, and an unlocked position where it disengages. This dynamic capability enables easy mounting and removal of the lid without complex fastening mechanisms, maintaining seal integrity when locked while simplifying operation
Data Source
AI summary
The invention relates, in the first instance, to an electrically operated food processor (1) with a cooking vessel (6) and a lid (10) for the cooking vessel (6), wherein it is possible to lock the lid (10) in the closed position in relation to the cooking vessel (6), wherein, furthermore, the cooking vessel (6) has a base and a wall (12) extending upwards from the base, wherein the cooking-vessel wall (12) merges into a radially projecting cooking-vessel periphery (13), wherein, furthermore, the lid (10) has a periphery (16) which, in the closed position, coincides with the cooking-vessel periphery (13). The invention also relates to a vessel (6) with a lid (10). In order further to improve a food processor and/or a vessel of the type in question, in particular in respect of the lid-locking means, it is proposed that the locking means is formed from a locking part (17) which is intended for engaging over the lid (10) and, by rotation about an axis (y), can be displaced from a release position into the locking position and vice versa, wherein the locking part (17) is of elongate design in the direction in which the axis (y) extends.