Trapezoidal Thread Locking Structure for Cookware
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Solution Overview
Problem
The process of flanging in conventional pressure cookers is complicated, affecting user convenience and requiring extensive material processing, which complicates the locking mechanism and increases the overall size of the cooker.
Innovation Solution
A cooking utensil with a locking structure featuring trapezoidal threads on the pot and lid, where the first thread has a length between half a turn and one turn of the pot's circumference, and thread angles between 20° and 40°, ensuring a secure and user-friendly locking mechanism that simplifies thread processing and reduces material waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flanging process is used to create locking structure, then locking effect is achieved, but the process becomes complicated and material waste increases
Solution Approach 1:
The patent changes the geometric parameters of the locking structure by introducing specific angle constraints (180° ≤ n ≤ 360° for the first angle, and 20° ≤ d1, d2 ≤ 40° for thread angles). These parameter specifications optimize the locking mechanism's performance while enabling simpler manufacturing processes that reduce complexity and material waste compared to traditional flanging methods.
2Reliability
If flanging process is used to create locking structure, then locking effect is achieved, but manufacturing time and material consumption increase
Solution Approach 1:
By optimizing the geometric parameters including the first angle n (180° ≤ n ≤ 360°) and thread angles d1, d2 (20° ≤ d1, d2 ≤ 40°), the patent achieves effective locking with reduced material removal and simplified processing steps, thereby improving manufacturing efficiency and reducing production time while maintaining reliable locking performance.
3Strength
If thread length is increased to improve locking, then locking strength increases, but user operation becomes more difficult
Solution Approach 1:
The patent optimizes the thread geometry by specifying that the first angle n should be between 180° and 360°, which corresponds to a thread length of between half a turn and one turn of the pot's circumference. This parameter optimization achieves the right balance: sufficient locking strength through adequate thread engagement while keeping the screwing operation convenient and quick for users.
Data Source
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AI summary
A cooking utensil comprising: a pot (10); a lid (20) covering the pot (10); and a locking structure (30) provided between the lid (20) and the pot (10) and comprising a first thread provided (31) on the pot (10) and a second thread (32) provided on the lid (20), which cooperate with each other, wherein: a first connecting line L1 between a first end of the first thread (31) and a center of the pot (10) forms a first angle n with a second connecting line L2 between a second end of the first thread (31) and the center of the pot, wherein 180° ≤ n ≤360°, so that the first thread has a length between half a turn and one turn of a circumference of the pot; the first and second threads are trapezoidal threads and have a thread angle d1, d2 that satisfy: 20°≤ d1, d2 ≤ 40°.