Cooking utensil with high assembly precision

Abstract

The utility model discloses a cooking utensil with high assembly precision, which comprises a shell and a base, one of the shell and the base is provided with a first limiting groove, and the other one of the shell and the base is provided with a first limiting clamping rib matched with the first limiting groove. The first limiting clamping rib is located in the first limiting groove, the first limiting clamping rib is stopped and limited through the first limiting groove so that the relative position of the shell and the base can be fixed, a first connecting ring edge is arranged at the bottom of the shell, a plurality of first notches are formed in the first connecting ring edge at intervals, and the first notches are located in the first limiting groove. And the upper edge of the base shields the first notch. The first limiting clamping rib is inserted into the first limiting groove, locking of the relative positions of the shell and the base can be achieved, assembling personnel do not need to apply high attention to accurately align the relative positions of the shell and the base, and the assembling speed of the shell and the base is greatly increased.

Description

Technical Field

[0001] This application belongs to the field of cooking utensil technology, specifically relating to a cooking utensil with high assembly precision. Background Technology

[0002] Traditional cooking appliances, such as rice cookers, typically consist of an outer shell, a base, and a central ring structure. During manufacturing, these components must first be manufactured separately before being assembled sequentially with the base and the central ring structure. During assembly, careful alignment of the outer shell with the base and with the central ring structure is crucial to prevent misalignment at the joints, which can negatively impact assembly speed.

[0003] Furthermore, since the outer shell, base, and central ring structure are typically made of plastic, there are many variables during the manufacturing process that can affect their dimensions, making it difficult to guarantee complete consistency in the finished product's dimensions. Therefore, even if the outer shell and base or the outer shell and central ring structure are precisely aligned during assembly, misalignment may still occur due to dimensional deviations. This affects the product's aesthetics and may cause discomfort during handling, impacting the user experience. Utility Model Content

[0004] This application provides a cooking appliance with high assembly precision to solve the problems of difficulty in aligning the outer shell, base, and middle ring structure during the assembly process of traditional cooking appliances, and the easy occurrence of misalignment at the connection between the outer shell, base, and middle ring structure after assembly.

[0005] The technical solution adopted in this application is as follows:

[0006] A cooking appliance with high assembly precision includes a shell and a base. One of the shell and the base is provided with a first limiting groove, and the other is provided with a first limiting rib adapted to the first limiting groove. When the shell and the base are aligned and installed, the first limiting rib is located in the first limiting groove, and the first limiting groove stops and limits the first limiting rib to fix the relative position of the shell and the base. The bottom of the shell is provided with a first connecting ring edge, and the first connecting ring edge is provided with a plurality of first notches at intervals. The upper edge of the base covers the first notches.

[0007] The cooking appliance described in this application also includes the following additional technical features:

[0008] The number of the first limiting grooves is multiple and they are arranged at intervals along the edge of the first connecting ring, and the first limiting rib is provided on the base.

[0009] The top of the first limiting groove is provided with a first guide flare, which includes two opposing first guide slopes. The two first guide slopes gradually move away from the end connected to the first limiting groove towards the end away from the first limiting groove.

[0010] There are two first limiting grooves, and each first notch is distributed between the two first limiting grooves.

[0011] The depth of the first notch is L1, where 0.2mm≤L1≤0.8mm.

[0012] A cooking appliance with high assembly precision includes a shell and a middle ring structure. One of the middle ring structure and the shell is provided with a second limiting groove, and the other is provided with a second limiting rib adapted to the second limiting groove. When the shell and the middle ring structure are aligned and installed, the second limiting rib is located in the second limiting groove, and the relative position of the shell and the middle ring structure is fixed by the second limiting groove stopping and limiting the second limiting rib. The top of the shell is provided with a second connecting ring edge, and the second connecting ring edge is provided with a plurality of second notches at intervals. The lower edge of the middle ring structure covers the second notches.

[0013] The cooking appliance described in this application also includes the following additional technical features:

[0014] The second limiting groove is multiple and is arranged at intervals along the edge of the second connecting ring, and the second limiting rib is provided in the middle ring structure.

[0015] The top of the second limiting groove is provided with a second guide flare, which includes two opposing second guide slopes. The two second guide slopes gradually move away from the end connected to the second limiting groove towards the end away from the second limiting groove.

[0016] There are two second limiting grooves, and each second notch is distributed between the two second limiting grooves.

[0017] The depth of the second notch is L1, where 0.2mm ≤ L1 ≤ 0.8mm.

[0018] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0019] 1. The cooking appliance of this application includes a shell and a base, and the shell and the base are respectively provided with a first limiting groove and a first limiting rib. When aligning the shell and the base, simply inserting the first limiting rib into the first limiting groove can lock the relative position of the shell and the base. The assembler does not need to pay close attention to accurately align the relative position of the shell and the base, which greatly improves the assembly speed of the shell and the base. In addition, a first connecting ring edge is provided at the bottom of the shell, and multiple first notches are provided on the first connecting ring edge. When the relative dimensions of the shell and the base are different due to manufacturing deviations, the first connecting ring edge can be used to lock the relative position of the shell and the base. When the first notch is set, the part of the first connecting ring edge between the corresponding two first notches becomes more deformable. For example, when the base size slightly exceeds the design size, causing the connection between the base and the shell to bulge outward, pressing the base inward to squeeze the first connecting ring edge, due to the setting of the first notch, the first connecting ring edge becomes more deformable. Therefore, it can easily undergo a small deformation under the squeezing force of the upper edge of the base to provide a certain degree of displacement space for the base, and to a certain extent reduce or even eliminate the unevenness at the connection between the base and the shell caused by manufacturing errors.

[0020] 2. In a preferred embodiment of this application, multiple first limiting grooves and multiple first limiting ribs are used. This improves the engagement stability of the first limiting grooves and the first limiting ribs. Multiple first limiting ribs and the first limiting grooves together restrict the relative displacement between the base and the outer shell, making the relative position of the base and the outer shell more stable. Furthermore, placing the first limiting groove on the edge of the first connecting ring avoids slotting in other parts of the outer shell. This allows the first connecting ring edge to not only have the function of creating a first notch for base fastening, but also to further integrate the function of forming the first limiting groove. This results in a high degree of functional integration and optimizes the structural design of the cooking appliance.

[0021] 3. In a preferred embodiment of this application, a first guide flare is provided at the top of the first limiting groove, allowing the first limiting retaining rib to be more easily inserted into the first guide flare during the assembly of the base and the outer shell. Guided by the first guide slope, it gradually inserts into the first limiting groove and engages with it. The design of the first guide flare eliminates the need for precise alignment of the relative positions of the first limiting retaining rib and the first limiting groove during assembly, further improving the assembly efficiency of the base and the outer shell.

[0022] 4. In a preferred embodiment of this application, the depth L1 of the first notch satisfies 0.2mm≤L1≤0.8mm, so that the first notch has sufficient depth to ensure that the portion of the first connecting ring between two adjacent first notches can be easily deformed, thereby satisfying the compression of the upper edge of the base to provide more accommodating depth for the upper edge of the base; at the same time, the first notch will not have too much impact on the structural strength of the edge of the first connecting ring, preventing the edge of the first connecting ring from breaking under pressure.

[0023] 5. As a preferred embodiment of this application, the cooking appliance of this application includes a shell and a middle ring structure, and the shell and the middle ring structure are respectively provided with a second limiting groove and a second limiting rib. When aligning the shell and the middle ring structure, it is only necessary to insert the second limiting rib into the second limiting groove to lock the relative position of the shell and the middle ring structure. The assembler does not need to pay high attention to accurately align the relative position of the shell and the middle ring structure, which greatly improves the assembly speed of the shell and the middle ring structure. In addition, a second connecting ring edge is provided at the bottom of the shell, and a plurality of second notches are provided on the second connecting ring edge. When the connection between the shell and the middle ring structure is affected by manufacturing deviation, the second connecting ring edge can be used to lock the relative position of the shell and the middle ring structure. When there are inconsistencies in relative dimensions, the setting of multiple second notches makes the part of the second connecting ring edge between the corresponding two second notches more easily deformable. For example, if the size of the middle ring structure slightly exceeds the design size, causing an outward bulge at the connection between the middle ring structure and the outer shell, pressing the middle ring structure inward to squeeze the second connecting ring edge will cause the second connecting ring edge to deform more easily due to the setting of the second notches. Therefore, it can easily undergo a small deformation under the squeezing force of the upper edge of the middle ring structure to provide a certain degree of displacement space for the middle ring structure, and reduce or even eliminate the unevenness at the connection between the middle ring structure and the outer shell caused by manufacturing errors to a certain extent. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of a portion of the rice cooker according to one embodiment of this application;

[0026] Figure 2 for Figure 1 Enlarged view of part A;

[0027] Figure 3 This is a schematic diagram of the base structure according to one embodiment of this application;

[0028] Figure 4 This is a cross-sectional view of a portion of the structure of a rice cooker according to one embodiment of this application. Figure 1 ;

[0029] Figure 5 for Figure 4 Enlarged view of part B;

[0030] Figure 6 This is a schematic diagram of the outer casing according to one embodiment of this application;

[0031] Figure 7 for Figure 6 Enlarged view of part C;

[0032] Figure 8 This is a schematic diagram of the middle ring structure according to one embodiment of this application;

[0033] Figure 9 This is a cross-sectional view of a portion of the structure of a rice cooker according to one embodiment of this application. Figure 2 ;

[0034] Figure 10 for Figure 9 Enlarged view of part D.

[0035] in:

[0036] 1. Outer shell; 11. First limiting groove; 111. First guide flare; 1111. First guide slope; 12. First connecting ring edge; 121. First notch; 13. Second limiting groove; 131. Second guide flare; 1311. Second guide slope; 14. Second connecting ring edge; 141. Second notch;

[0037] 2. Base; 21. First limit rib;

[0038] 3. Middle ring structure, 31. Second limiting retaining rib. Detailed Implementation

[0039] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0040] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0041] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0044] like Figures 1 to 5 As shown, a cooking appliance with high assembly precision includes a shell 1 and a base 2. One of the shell 1 and the base 2 is provided with a first limiting groove 11, and the other is provided with a first limiting rib 21 adapted to the first limiting groove 11. When the shell 1 and the base 2 are aligned and installed, the first limiting rib 21 is located in the first limiting groove 11, and the first limiting groove 11 stops and limits the first limiting rib 21 to fix the relative position of the shell 1 and the base 2. The bottom of the shell 1 is provided with a first connecting ring edge 12, and the first connecting ring edge 12 is provided with a plurality of first recesses 121 at intervals. The upper edge of the base 2 covers the first recesses 121.

[0045] The cooking appliance of this application includes a shell 1 and a base 2, and the shell 1 and the base 2 are respectively provided with a first limiting groove 11 and a first limiting retaining rib 21. When aligning the shell 1 and the base 2, the first limiting retaining rib 21 is simply inserted into the first limiting groove 11 to lock the relative position of the shell 1 and the base 2. The assembler does not need to pay high attention to accurately align the relative position of the shell 1 and the base 2, which greatly improves the assembly speed of the shell 1 and the base 2. In addition, the bottom of the shell 1 is provided with a first connecting ring edge 12, and the first connecting ring edge 12 is provided with a plurality of first notches 121. When the relative dimensions of the shell 1 and the base 2 at the connection point are different due to manufacturing deviations, the first connecting ring edge 12 is provided with a first connecting ring edge 12. When there is inconsistency, the setting of multiple first notches 121 makes the portion of the first connecting ring edge 12 between the corresponding two first notches 121 more easily deformable; for example, when the size of the base 2 slightly exceeds the design size, causing the connection between the base 2 and the outer shell 1 to bulge outwards, pressing the base 2 inwards to squeeze the first connecting ring edge 12, due to the setting of the first notches 121, the first connecting ring edge 12 becomes more easily deformable, so it can be easily deformed slightly under the squeezing force on the upper edge of the base 2 to provide a certain degree of displacement space for the base 2, and to a certain extent reduce or even eliminate the unevenness at the connection between the base 2 and the outer shell 1 caused by manufacturing errors.

[0046] As a preferred embodiment of this application, such as Figure 1 As shown, there are multiple first limiting grooves 11 arranged at intervals along the first connecting ring edge 12, and a first limiting retaining rib 21 is provided on the base 2. By having multiple first limiting grooves 11 and multiple first limiting retaining ribs 21, the engagement stability of the first limiting grooves 11 and the first limiting retaining ribs 21 is improved. The multiple first limiting retaining ribs 21 and the first limiting grooves 11 together restrict the relative displacement between the base 2 and the outer shell 1, making the relative position of the base 2 and the outer shell 1 more stable. At the same time, placing the first limiting grooves 11 on the first connecting ring edge 12 avoids slotting in other parts of the outer shell 1. This allows the first connecting ring edge 12 to not only have the function of opening the first notch 121 for fastening the base 2, but also to further integrate the function of forming the first limiting grooves 11, resulting in a high degree of functional integration and optimizing the structural design of the cooking appliance.

[0047] As a preferred embodiment of this implementation, such as Figure 2As shown, the top of the first limiting groove 11 is provided with a first guide flare 111, which includes two opposing first guide slopes 1111. The two first guide slopes 1111 gradually move away from the end connected to the first limiting groove 11 towards the end away from the first limiting groove 11. The first guide flare 111 at the top of the first limiting groove 11 allows the first limiting retaining rib 21 to be more easily inserted into the first guide flare 111 during the assembly of the base 2 and the outer shell 1. Guided by the first guide slopes 1111, it gradually inserts into the first limiting groove 11 and achieves a fit with the first limiting groove 11. The design of the first guide flare 111 eliminates the need for precise alignment of the relative positions of the first limiting retaining rib 21 and the first limiting groove 11 during assembly, further improving the assembly efficiency of the base 2 and the outer shell 1.

[0048] This embodiment does not limit the specific number of the first limiting grooves 11 or the arrangement position of the first notches 121, and can adopt any of the following embodiments:

[0049] Example 1: As Figure 1 As shown, there are two first limiting grooves 11, and each first notch 121 is distributed between the two first limiting grooves 11. With this configuration, after the first limiting rib 21 cooperates with the first limiting groove 11 to position the base 2 and the outer shell 1, the base 2 is compressed inward, so that the part of the base 2 between the corresponding two first limiting grooves 11 is inwardly fitted.

[0050] Example 2: The number of first limiting grooves is greater than two and they are arranged at intervals along the circumference of the first connecting ring edge; the first notches are arranged at intervals along the circumference of the first connecting ring edge. This arrangement ensures that the outer shell has first notches evenly distributed in all directions extending circumferentially from the corresponding first connecting ring edge. Regardless of where the base has a misalignment with the outer shell, the alignment and flushness between the base and the outer shell can be improved by pressing the first connecting ring edge inward.

[0051] In a preferred embodiment of this application, the depth of the first notch 121 is L1, 0.2mm≤L1≤0.8mm. The depth L1 of the first notch 121 satisfies 0.2mm≤L1≤0.8mm, so that the first notch 121 has sufficient depth to ensure that the portion of the first connecting ring between two adjacent first notches 121 can be deformed relatively easily, thereby satisfying the compression of the upper edge of the base 2 to provide more accommodating depth for the upper edge of the base 2; at the same time, the first notch 121 will not have too much impact on the structural strength of the first connecting ring edge 12, preventing the first connecting ring edge 12 from breaking under pressure. Specifically, the depth of the first notch 121 refers to the distance between the bottom surface of the first notch 121 away from the base 2 and the outer surface of the first connecting ring edge 12 near the base 2. L1 can be any value within 0.2mm and 0.8mm, such as 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.71mm, 0.72mm, 0.79mm, 0.8mm.

[0052] like Figures 6 to 10 As shown, one of the middle ring structure 3 and the outer shell 1 is provided with a second limiting groove 13, and the other is provided with a second limiting rib 31 adapted to the second limiting groove 13. When the outer shell 1 and the middle ring structure 3 are aligned and installed, the second limiting rib 31 is located in the second limiting groove 13, and the second limiting groove 13 stops and limits the second limiting rib 31 to fix the relative position of the outer shell 1 and the middle ring structure 3. The top of the outer shell 1 is provided with a second connecting ring edge 14, and the second connecting ring edge 14 is provided with a plurality of second recesses 141 at intervals. The lower edge of the middle ring structure 3 covers the second recesses 141.

[0053] The cooking appliance of this application includes a shell 1 and a middle ring structure 3. The shell 1 and the middle ring structure 3 are respectively provided with a second limiting groove 13 and a second limiting retaining rib 31. When aligning the shell 1 and the middle ring structure 3, simply inserting the second limiting retaining rib 31 into the second limiting groove 13 locks the relative position of the shell 1 and the middle ring structure 3. Assemblers do not need to exert high attention to accurately align the relative positions of the shell 1 and the middle ring structure 3, significantly improving the assembly speed. Furthermore, a second connecting ring edge 14 is provided at the bottom of the shell 1, and multiple second notches 141 are provided on the second connecting ring edge 14. When the relative dimensions of the connection between the shell 1 and the middle ring structure 3 differ due to manufacturing deviations... When there is inconsistency, the arrangement of multiple second notches 141 makes the portion of the second connecting ring edge 14 between the corresponding two second notches 141 more easily deformable. For example, if the size of the middle ring structure 3 slightly exceeds the design size, causing an outward convex misalignment at the connection between the middle ring structure 3 and the outer shell 1, pressing the middle ring structure 3 inward will cause the middle ring structure 3 to squeeze the second connecting ring edge 14. Due to the arrangement of the second notches 141, the second connecting ring edge 14 becomes more easily deformable. Therefore, it can easily undergo a small deformation under the squeezing force on the upper edge of the middle ring structure 3 to provide a certain degree of displacement space for the middle ring structure 3, and to a certain extent reduce or even eliminate the unevenness at the connection between the middle ring structure 3 and the outer shell 1 caused by manufacturing errors.

[0054] As a preferred embodiment of this application, such as Figure 6 As shown, there are multiple second limiting grooves 13 arranged at intervals along the edge 14 of the second connecting ring, and the second limiting ribs 31 are provided in the middle ring structure 3.

[0055] By setting multiple second limiting grooves 13 and multiple second limiting ribs 31, the engagement stability of the second limiting grooves 13 and the second limiting ribs 31 can be improved. Multiple second limiting ribs 31 and second limiting grooves 13 together restrict the relative displacement between the middle ring structure 3 and the outer shell 1, making the relative position of the middle ring structure 3 and the outer shell 1 more stable. Simultaneously, setting the second limiting grooves 13 on the second connecting ring edge 14 avoids slotting in other parts of the outer shell 1. This allows the second connecting ring edge 14 to not only have the function of opening the second notch 141 to facilitate the fastening of the middle ring structure 3, but also further integrate the function of forming the second limiting grooves 13. This high degree of functional integration optimizes the structural design of the cooking appliance.

[0056] As a preferred embodiment of this implementation, such as Figure 7As shown, the top of the second limiting groove 13 is provided with a second guide flare 131, which includes two opposing second guide slopes 1311. The two second guide slopes 1311 gradually move away from the end connected to the second limiting groove 13 towards the end away from the second limiting groove 13. The second guide flare 131 at the top of the second limiting groove 13 allows the second limiting retainer 31 to be inserted more easily into the second guide flare 131 during the assembly of the base 2 and the outer shell 1. Guided by the second guide slopes 1311, it gradually inserts into the second limiting groove 13 and achieves a fit with the second limiting groove 13. The design of the second guide flare 131 eliminates the need for precise alignment of the relative positions of the second limiting retainer 31 and the second limiting groove 13 during assembly, further improving the assembly efficiency of the middle ring structure 3 and the outer shell 1.

[0057] This embodiment does not limit the specific number of the second limiting grooves 13 or the arrangement position of the second notches 141, and can adopt any of the following embodiments:

[0058] Example 3: Figure 6 As shown, there are two second limiting grooves 13, and each second notch 141 is distributed between the two second limiting grooves 13. With this configuration, after the second limiting rib 31 and the second limiting groove 13 cooperate to position the middle ring structure 3 and the outer shell 1, the middle ring structure 3 is compressed inward, so that the part of the middle ring structure 3 between the corresponding two second limiting grooves 13 is inwardly fitted.

[0059] Example 4: The number of second limiting grooves is greater than two and they are arranged at intervals along the circumference of the second connecting ring edge; the second notches are arranged at intervals along the circumference of the second connecting ring edge. This arrangement ensures that the outer shell has second notches evenly distributed in all directions extending circumferentially from the corresponding second connecting ring edge. Regardless of where the middle ring structure deviates from the outer shell, the alignment and flushness between the middle ring structure and the outer shell can be improved by pressing the second connecting ring edge inward.

[0060] In a preferred embodiment of this application, the depth of the second notch 141 is L2, where 0.2mm ≤ L2 ≤ 0.8mm. The depth L2 of the second notch 141 satisfies 0.2mm ≤ L2 ≤ 0.8mm, ensuring that the second notch 141 has sufficient depth to allow the portion of the second connecting ring between two adjacent second notches 141 to deform relatively easily. This satisfies the compression of the upper edge of the middle ring structure 3, providing more accommodating depth for the upper edge of the middle ring structure 3. Simultaneously, the second notch 141 does not excessively affect the structural strength of the second connecting ring edge 14, preventing the second connecting ring edge 14 from breaking under pressure. Specifically, the depth of the second notch 141 refers to the distance between the bottom surface of the second notch 141 away from the middle ring structure 3 and the outer surface of the second connecting ring edge 14 near the middle ring structure 3. L2 can be any value within 0.2mm and 0.8mm, such as 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.71mm, 0.72mm, 0.79mm, 0.8mm.

[0061] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0062] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0063] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A cooking utensil with high assembly precision, comprising a shell and a base, characterized in that, One of the outer shell and the base is provided with a first limiting groove, and the other of the two is provided with a first limiting rib adapted to the first limiting groove. When the outer shell and the base are aligned and installed, the first limiting rib is located in the first limiting groove, and the relative position of the outer shell and the base is fixed by the first limiting groove stopping and limiting the first limiting rib. The bottom of the outer shell is provided with a first connecting ring edge, and the first connecting ring edge is provided with a plurality of first notches at intervals. The upper edge of the base covers the first notches.

2. The cooking utensil according to claim 1, characterized in that, The number of the first limiting grooves is multiple and they are arranged at intervals along the edge of the first connecting ring, and the first limiting rib is provided on the base.

3. The cooking utensil according to claim 2, characterized in that, The top of the first limiting groove is provided with a first guide flare, which includes two opposing first guide slopes. The two first guide slopes gradually move away from the end connected to the first limiting groove towards the end away from the first limiting groove.

4. The cooking utensil according to claim 2, characterized in that, There are two first limiting grooves, and each first notch is distributed between the two first limiting grooves.

5. The cooking utensil according to claim 1, characterized in that, The depth of the first notch is L1, where 0.2mm≤L1≤0.8mm.

6. A cooking utensil with high assembly precision, comprising a shell and a central ring structure, characterized in that, One of the middle ring structure and the outer shell is provided with a second limiting groove, and the other of the two is provided with a second limiting rib adapted to the second limiting groove. When the outer shell and the middle ring structure are aligned and installed, the second limiting rib is located in the second limiting groove, and the relative position of the outer shell and the middle ring structure is fixed by the stop limiting of the second limiting rib through the second limiting groove. The top of the outer shell is provided with a second connecting ring edge, and the second connecting ring edge is provided with a plurality of second notches at intervals. The lower edge of the middle ring structure covers the second notches.

7. The cooking utensil according to claim 6, characterized in that, The second limiting groove is multiple and is arranged at intervals along the edge of the second connecting ring, and the second limiting rib is provided in the middle ring structure.

8. The cooking utensil according to claim 7, characterized in that, The top of the second limiting groove is provided with a second guide flare, which includes two opposing second guide slopes. The two second guide slopes gradually move away from the end connected to the second limiting groove towards the end away from the second limiting groove.

9. The cooking utensil according to claim 7, characterized in that, There are two second limiting grooves, and each second notch is distributed between the two second limiting grooves.

10. The cooking utensil according to claim 6, characterized in that, The depth of the second notch is L1, where 0.2mm ≤ L1 ≤ 0.8mm.

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