An electric kettle

Abstract

The utility model discloses an electric kettle, including inner bag, the plastic shell of the inner bag outside and the bottom cover of the plastic shell below, the bottom of plastic shell is provided with the cooperation convex rib that protrudes downward, and the cooperation space is formed between cooperation convex rib and the bottom wall of plastic shell, and the cooperation department that surrounds cooperation convex rib outside is provided with in the cooperation space to the bottom cover, and the inner wall of plastic shell is provided with the annular groove that extends along the circumference of plastic shell, and the annular groove is located cooperation convex rib's top. Through doing the glue processing in the inside of plastic shell, increase the flow resistance of molten plastic here, increase the difficulty of plastic reflow, reduce the appearance defect such as shrinkage that appears in the lower end of plastic shell, make shrinkage surface shift to the inner surface of plastic shell simultaneously, improve the appearance quality of plastic shell. The utility model can solve the mutually contradictory problem of the appearance defect that product appearance shrinkage produces and the big size processing error of plastic shell simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of household appliance technology, specifically relating to an electric kettle. Background Technology

[0002] Electric kettles, also known as tea makers, health-preserving kettles, boiling water boilers, formula makers, and electric water bottles, are common household appliances. Based on their structure, they can generally be divided into two categories: single-layer kettles and double-layer kettles. Single-layer kettles, when boiling water or stewing food, transfer heat directly to the outer surface, making the surface hot and uncomfortable to hold. Double-layer kettles typically consist of an inner liner, an outer shell, and a bottom lid. The outer shell and bottom lid are usually made of plastic for better aesthetics and insulation.

[0003] Chinese patent CN206995081U discloses a liquid heater, the bottom cover of which includes an annular sidewall that mates with the lower end of the outer shell. The lower end of the outer shell is provided with a downwardly protruding positioning ring rib to form a stepped structure. The annular sidewall surrounds the outer periphery of the stepped structure to mate with and be positioned with the outer shell.

[0004] However, for plastic shells, which are usually manufactured by injection molding, the thickness of the plastic at the positioning ring rib at the bottom of the shell is smaller, while the thickness of the main plastic area is larger. Due to the large difference in thickness, the molten plastic shrinks unevenly during the flow process. The plastic cools faster at the thinner plastic area than at the thicker plastic area. In addition, the plastic has good fluidity, and during the cooling process, the thinner plastic area will pull and back the amount of plastic at the thicker plastic area. This shrinkage on the outer surface of the shell causes shrinkage and dark spots, resulting in appearance defects and affecting the appearance quality of the kettle.

[0005] To avoid appearance defects at the bottom of the outer casing, increased pressure and extended cooling time are often used during injection molding. Increased pressure ensures that the stepped structure at the bottom of the casing replenishes the amount of material during the cooling process as the main body of the casing flows back. Extended cooling time allows the casing to solidify in the mold for a longer period. However, increased pressure leads to a larger casing size and the formation of burrs. This results in significant dimensional errors in the casing, making it difficult to assemble with the bottom cover and affecting the overall quality of the electric kettle. Furthermore, the burrs can cause scratches and roughness during use, negatively impacting the user experience. Utility Model Content

[0006] This utility model provides an electric kettle to solve the problems of shrinkage and other appearance defects that easily occur at the lower positioning structure during the molding process of the plastic shell of the electric kettle, as well as the large errors in the size of the shell during the processing, which affect the assembly.

[0007] The technical solution adopted in this utility model is as follows:

[0008] An electric kettle includes an inner liner, a plastic outer shell located outside the inner liner, and a bottom cover located below the plastic outer shell. The plastic outer shell includes a main body and a mating rib extending downward from the lower end of the main body. A mating space is formed between the mating rib and the bottom of the main body. The bottom cover is provided with a mating part located within the mating space and surrounding the outside of the mating rib. The inner wall of the main body is provided with an annular groove extending circumferentially along the plastic outer shell. The annular groove is located above the mating rib.

[0009] In this invention, an annular groove is provided on the inner wall of the main body of the plastic shell, and the annular groove is located above the mating rib, thus performing a shrinkage treatment on the inner side of the plastic shell. During the injection molding process of the plastic shell, this increases the flow resistance of the molten plastic at this location, thereby increasing the difficulty of plastic backflow and reducing the probability of appearance defects such as shrinkage at the lower end of the main body and the mating rib. In addition, the annular groove also reduces the wall thickness of the main body to a certain extent, reducing the difference in wall thickness between it and the mating rib. This results in better uniform shrinkage of the plastic at the mating rib and the main body, and the cooling rates are more similar, further reducing the possibility of appearance problems such as flow marks caused by excessive differences in cooling rates.

[0010] Furthermore, since the annular groove is located on the inner wall of the plastic shell, even if shrinkage occurs during injection molding, the annular groove can change the direction of shrinkage, causing the shrinkage surface to transfer to the inner surface of the plastic shell. Since the inner surface of the plastic shell is not an external surface and cannot be directly seen by the user after assembly, it can greatly improve the appearance quality of the plastic shell.

[0011] Because the annular groove effectively reduces the probability of appearance defects in the plastic casing during injection molding, there is no need for special operations such as increasing pressure and extending cooling time during processing. On the contrary, the holding pressure and cooling time can be appropriately reduced to improve the processing accuracy of the plastic casing, reduce dimensional errors, and ensure reliable assembly with the bottom cover, thereby improving product yield. It also reduces burrs on the plastic casing, making the edges smoother and more rounded, improving the user's feel.

[0012] In summary, this utility model can simultaneously solve the contradictory problems of appearance defects caused by product shrinkage and large processing errors in the plastic shell making assembly with the bottom cover difficult. It greatly improves the processing precision and appearance quality of the plastic shell of the electric kettle, and enhances the overall aesthetics and quality of the machine.

[0013] The depth of the annular groove in the radial direction of the plastic shell is less than the thickness of the mating rib.

[0014] Because an annular groove is provided on the inner wall of the plastic shell, and this groove is located above the mating rib, the presence of the annular groove reduces the wall thickness in a local area of ​​the main body. This reduction in wall thickness affects the structural strength of the mating rib, posing a risk of deformation or breakage when the mating rib and the bottom cover are fitted together. In this solution, by designing the depth of the annular groove to be less than the thickness of the mating rib, the annular groove allows for the reduction of plastic shell defects through adhesive skimming, while ensuring the structural strength of the mating rib and the lower end of the main body. This reduces the possibility of deformation or breakage of the main body and the mating rib, ensuring a stable and reliable fit with the bottom cover.

[0015] The thickness of the mating rib gradually decreases from top to bottom, and the bottom surface of the mating rib is provided with a mating plane. The depth of the annular groove in the radial direction of the plastic shell is less than the width of the mating plane in the radial direction of the plastic shell.

[0016] Due to the limitations of the overall structural design of electric kettles, the mating part of the bottom cover may be a vertical wall structure, or it may be a sloping wall structure that gradually expands outward from bottom to top, or an arc-shaped wall structure. When the mating part is sloping, if the mating rib is a vertical rib with a uniform thickness from top to bottom, the upper edge of the mating part will lift up relative to the outer surface of the plastic shell after the two parts are mated, resulting in a large step difference at the mating position of the plastic shell and the bottom cover, affecting the overall appearance uniformity and the feel of use. In this solution, the thickness of the mating rib gradually decreases from top to bottom. On the one hand, it can better adapt to the arc-shaped or sloping shape of the mating part, making the upper edge of the mating part fit more closely with the outer surface of the plastic shell, reducing the gap at the mating point. On the other hand, due to the change in the thickness of the mating rib, a guide slope is also formed on its outer surface. When assembling with the mating part, the mating part can be more easily aligned and assembled by the guide slope, improving the positioning effect during assembly. The depth of the annular groove is less than the width of the mating plane at the bottom end of the mating rib, further limiting the depth of the annular groove and ensuring the structural strength of the plastic shell in the area above the mating rib.

[0017] The annular groove transitions to the inner wall of the plastic shell via a transition surface, which has a raised portion that protrudes toward the interior of the plastic shell.

[0018] To create an annular groove structure on the inner wall of a plastic shell, a protruding structure needs to be set at the corresponding position in the mold. However, during demolding, the groove wall of the annular groove interferes with the protruding structure of the mold, making demolding difficult. Furthermore, significant extrusive force is generated between the protruding structure of the mold and the plastic shell during this process, easily causing irreversible plastic deformation or damage to the plastic shell, resulting in dimensional deviations or even scrapping. In this solution, curved surfaces are used to transition smoothly between the annular groove and the inner wall of the plastic shell on both sides, improving the smoothness of the transition and avoiding sharp corners. This allows the protruding structure of the mold to slide smoothly out of the annular groove guided by the transition curved surface, completing demolding. Furthermore, the transition curved surface bulges towards the inside of the plastic shell, enhancing the guiding effect on the protruding structure of the mold, making it easier for the protruding structure to slide out of the annular groove without jamming with the groove wall, ensuring smooth demolding.

[0019] The annular groove has a bottom groove wall and a horizontally extending stepped surface in the mating space. The distance between the lower edge of the bottom groove wall and the stepped surface in the axial direction of the plastic shell is 1mm to 2mm.

[0020] The mating rib is a cantilever structure with its upper end fixed to the main body and its lower end free. When subjected to radial inward or outward compressive force along the plastic shell, it will swing inward or outward around its top. The area of ​​greatest stress on the mating rib is at the top, where it connects to the main body. The annular groove, located above the mating rib, reduces the structural strength of a localized area of ​​the main body to some extent. In this design, by limiting the height of the annular groove, it addresses the issue of appearance defects during the molding process of the plastic shell while maintaining a distance from the stepped surface, i.e., the top of the mating rib. This ensures the structural strength of the top area of ​​the mating rib and prevents damage when subjected to excessive compressive force.

[0021] The electric kettle includes a kettle body and a lid rotatably connected to the kettle body. The lid includes an upper lid, a lower metal lid, and an opening assembly located between the upper lid and the lower metal lid. The opening assembly is fixed to the upper lid and is capable of horizontal reciprocating movement between the upper lid and the lower metal lid. The opening assembly includes a locking part for locking with the kettle body. The locking part has a contact protrusion on the side facing the lower metal lid so that the opening assembly contacts the lower metal lid through the contact protrusion.

[0022] In existing technology, a kettle lid typically includes a top lid, a bottom lid, and a mounting bracket located between the two. The lid opening component is fixed to the mounting bracket, which serves to secure the lid opening component and guide its movement. However, this type of lid has several drawbacks. First, due to the large number of structural components, the lid is thick and heavy, resulting in significant impact forces on the rotating joints when opening and closing, which can easily lead to breakage at the connection between the lid and the kettle body. Second, the large number of components also limits assembly efficiency, resulting in low production efficiency. Simply eliminating the mounting bracket leads to a large contact area between the lid opening component and the bottom lid, generating significant frictional resistance and severely affecting the smoothness of the lid opening component's movement, causing a jamming sensation. Furthermore, since the bottom lid is in direct contact with the high-temperature steam or food inside the inner pot, its temperature is high. This heat is transferred to the lid opening component through the contact area, causing the lid opening component to overheat. Users then need to directly touch the lid opening component to open the lid, which is inconvenient for them.

[0023] In this design, the lid-opening assembly is fixed to the upper lid, allowing the upper lid to both fix and guide the movement of the lid-opening assembly. This eliminates the need for a mounting bracket, reducing the number of lid components. This not only helps to reduce the overall thickness and weight of the lid, making operation easier for the user, but also reduces the impact force on the connection between the lid and the body, ensuring a stable connection. Furthermore, the reduced number of components lowers the assembly difficulty and improves assembly efficiency. In addition, the lid-opening assembly contacts the lower metal lid via a contact protrusion on the bottom surface of the locking part. This reduces the contact area between the lid-opening assembly and the lower metal lid, thereby reducing frictional resistance and making the movement of the lid-opening assembly smoother. It also reduces the feeling of jamming when the user operates the lid-opening assembly, improving the user experience. On the other hand, the reduced contact area also reduces the heat transferred from the lower metal lid to the lid-opening assembly, keeping the lid-opening assembly at a lower temperature. This not only improves the user's tactile experience but also reduces the possibility of deformation of the lid-opening assembly at high temperatures.

[0024] The opening assembly also includes an operating part, a portion of which is exposed on the upper shell. The locking part is connected to the operating part. The upper cover is provided with first guide ribs on both sides of the operating part and second guide ribs on both sides of the locking part. Both the first and second guide ribs extend along the movement direction of the opening assembly.

[0025] The lid-opening assembly includes an operating part and a locking part, located in different positions. The operating part is situated in the central area of ​​the lid for easy user operation, while the locking part extends to the edge of the lid to lock it into place with the kettle body. Therefore, simply guiding only one part of the lid-opening assembly will result in poor guidance, potentially leading to partial misalignment or jamming. In this design, the lid is equipped with a first guide rib and a second guide rib. The first guide rib is located on both sides of the operating part, and the second guide rib is located on both sides of the locking part. During the movement of the lid-opening assembly, the first guide rib guides the operation part, and the second guide rib guides the locking part, thus guiding multiple parts of the lid-opening assembly simultaneously. This significantly improves the guiding effect and ensures reliable and smooth movement of the entire assembly. Furthermore, the guide ribs are located on both sides, extending along the direction of movement of the lid-opening assembly, confining its movement within the channel formed by the guide ribs. This ensures that the lid-opening assembly can only reciprocate along the direction of the channel and will not deviate.

[0026] The top cover is provided with a mounting base, which is located on one side of the opening assembly. An elastic reset member and a limiting rib are provided between the mounting base and the opening assembly. The limiting rib is used to limit the movement of the opening assembly.

[0027] When a user operates the lid-opening component, they directly touch it. Therefore, a portion of the lid-opening component needs to be exposed outside the lid. However, if the user moves the lid-opening component too much and it retracts completely into the lid, it may interfere with the lid and fail to extend when it resets. In this solution, an elastic reset element between the mounting base and the lid-opening component provides a reset force. When the user pushes the lid-opening component to open the lid, it moves towards the mounting base, compressing and storing force in the elastic reset element. When the user releases the lid-opening component, the elastic reset element pushes it back to its original position under the elastic force. Furthermore, a limiting rib is located between the mounting base and the lid-opening component, i.e., on the movement path of the lid-opening component, to limit its movement. The distance between the lid-opening component and the limiting rib in the initial state is the maximum movement of the lid-opening component. This makes the movement of the opening component more reliable, and by designing the above distance, the opening component will not retract completely into the upper cover, thus avoiding interference between the opening component and the upper cover and the inability to reset properly.

[0028] The metal bottom cover includes a bottom wall and a side wall. The side wall has a guide hole, and the locking part passes through the guide hole to lock with the body of the pot.

[0029] When the lid-opening assembly only engages with the top lid, its structural and positional relationship with the lower metal lid is poor, making it prone to relative wobbling and resulting in a loose overall lid structure. In this design, the locking part passes through a guide hole on the side wall of the lower metal lid and locks into the kettle body. This improves the structural relationship between the lid-opening assembly and the lower metal lid, making the overall lid structure more compact. Furthermore, the guide hole guides the locking part, ensuring it can only reciprocate along the opening direction of the guide hole. The wall of the guide hole also acts as a stop for the locking part, preventing it from shifting.

[0030] The locking part includes a body and a latch. The cross-sectional area of ​​the latch is smaller than that of the body to form a stepped stop surface between the two. The latch passes through a guide hole, and the stepped stop surface abuts against the side wall. The upper cover is provided with a limiting rib located on one side of the opening assembly and used to limit the movement of the opening assembly. The distance between the opening assembly and the limiting rib in the movement direction is smaller than the length of the latch in the movement direction of the opening assembly.

[0031] Because the latch and guide hole are interlocked, if the latch comes out of the guide hole, the two will misalign when re-interlocked due to the latch's movement, making it impossible to complete the interlocking. Simultaneously, the presence of the guide hole allows steam from inside the inner liner and liquid from the outer side wall of the metal lower lid when the lid is closed, as well as liquid from the outer side wall of the metal lower lid when the lid is open, to enter the cavity between the upper lid and the metal lower lid, contaminating the inside of the lid and eventually causing an odor. In this design, a stepped stop surface is provided between the body and the latch. The latch passes through the guide hole, so that in the initial state, the stepped stop surface abuts against the inner side wall of the metal lower lid, sealing the gap between the guide hole and the latch, making it difficult for steam and liquid to enter the space between the upper lid and the metal lower lid. Furthermore, the movement of the cover opening component is limited by the limiting rib, so that its movement is less than the length of the locking tongue. As a result, when the cover opening component moves to the limit position, the locking tongue will not come out of the guide hole. The two always maintain a plug-in engagement, thus maintaining a reliable engagement between the two. This avoids the need for the locking tongue to be re-aligned with the guide hole when resetting, reducing the possibility that the cover opening component cannot move and reset due to misalignment. Attached Figure Description

[0032] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0033] Figure 1 This is a top view of the plastic shell according to one embodiment of the present invention;

[0034] Figure 2 for Figure 1 A cross-sectional view of the plastic casing from the AA perspective;

[0035] Figure 3 for Figure 2 A magnified view of area A in the middle;

[0036] Figure 4 This is a cross-sectional view of the assembled plastic shell and bottom cover according to one embodiment of the present invention;

[0037] Figure 5 for Figure 4 A magnified view of area B in the middle;

[0038] Figure 6 This is a cross-sectional view of the plastic shell during the processing of one embodiment of the present invention;

[0039] Figure 7 for Figure 6 A magnified view of area C during the demolding process;

[0040] Figure 8 This is an exploded view of the structure of an electric kettle according to one embodiment of the present invention;

[0041] Figure 9 This is a cross-sectional view of an electric kettle according to one embodiment of the present invention;

[0042] Figure 10 for Figure 9 A magnified view of region D in the middle;

[0043] Figure 11 This is a schematic diagram of the structure of the top cover according to one embodiment of the present invention;

[0044] Figure 12 This is a cross-sectional view of the lid of a teapot according to one embodiment of the present invention;

[0045] Figure 13 This is a cross-sectional view of the lid of the pot according to one embodiment of the present invention from another perspective;

[0046] Figure 14 for Figure 13 A magnified view of region E in the middle;

[0047] Figure 15 This is a cross-sectional view of the lid of a teapot according to one embodiment of the present invention;

[0048] Figure 16 for Figure 15 A magnified view of region F in the middle.

[0049] in:

[0050] 1. Plastic outer shell; 11. Fitting ribs; 111. Fitting plane; 12. Fitting space; 13. Stepped surface; 14. Annular groove; 141. Transition curved surface; 142. Raised part; 15. Bottom groove wall; 16. Main body;

[0051] 2. Bottom cover; 21. Fitting part;

[0052] 3 male mold cores; 31 annular protrusion structures;

[0053] 4 push plates;

[0054] 5. Lid; 51. Top cover; 511. Hand groove; 512. Opening; 513. Mounting base; 5131. Guide post; 514. First guide rib; 515. Second guide rib; 516. Elastic reset component; 517. Limiting rib; 5171. Stop section; 5172. Reinforcing section; 52. Metal bottom cover; 521. Guide hole; 522. Return hole; 53. Lid opening assembly; 531. Operating part; 5311. Button plate; 532. Locking part; 5321. Body; 5322. Locking tongue; 5323. Stepped stop surface; 533. Contact protrusion;

[0055] 6 handles;

[0056] 7. Inner liner; 71. Locking joint;

[0057] 8. The body of the teapot. Detailed Implementation

[0058] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0059] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0060] Furthermore, it should be understood in the description of this utility model 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. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0061] In this utility model, unless otherwise explicitly 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 utility model according to the specific circumstances.

[0062] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "aspect," or "specific example" 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 invention. 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 may be combined in any suitable manner in one or more embodiments or examples.

[0063] like Figures 1 to 5 As shown, an electric kettle includes an inner liner 7, a plastic outer shell 1 located outside the inner liner 7, and a bottom cover 2 located below the plastic outer shell 1. The plastic outer shell 1 includes a main body 16 and a mating rib 11 extending downward from the lower end of the main body 16. A mating space 12 is formed between the mating rib 11 and the bottom of the main body 16. The bottom cover 2 is provided with a mating part 21 located within the mating space 12 and surrounding the outside of the mating rib 11. The inner wall of the main body 16 is provided with an annular groove 14 extending circumferentially along the plastic outer shell 1. The annular groove 14 is located above the mating rib 11.

[0064] Specifically, such as Figure 3 As shown, the mating space 12 is located radially outward of the mating rib 11 along the plastic shell 1. When the bottom cover 2 is mated with the plastic shell 1, the mating portion 21 of the bottom cover 2 is located within the mating space 12, and the top surface of the mating portion 21 abuts against the bottom surface of the main body 16. It should be noted that, in one embodiment, as... Figure 5 As shown, a portion of the sidewall of the bottom cover 2 forms a mating part 21, meaning the top of the sidewall of the bottom cover 2 surrounds the outside of the mating rib 11. In another embodiment, the top of the sidewall of the bottom cover 2 is provided with a stepped structure, namely, an upwardly protruding positioning protrusion and a positioning space located inside the positioning protrusion, thereby complementing the mating protrusion and mating space 12 at the bottom of the plastic shell 1. Specifically, the mating protrusion extends into the positioning space, and the positioning protrusion extends into the mating space 12.

[0065] Preferably, the annular groove 14 extends in a complete circle along the circumference of the plastic shell 1.

[0066] In this invention, an annular groove 14 is provided on the inner wall of the plastic shell 1, and the annular groove 14 is located above the mating rib 11, which means that the plastic shell 1 is treated to reduce the amount of glue loss. During the injection molding process of the plastic shell 1, the flow resistance of the molten plastic at this point is increased, thereby increasing the difficulty of plastic backflow and reducing appearance defects such as shrinkage at the lower end of the main body 16. In addition, the annular groove 14 also reduces the wall thickness at the lower end of the main body 16 to a certain extent, so that the difference in wall thickness between it and the mating rib 11 is reduced. As a result, the shrinkage uniformity of the plastic at the mating rib 11 and the lower end of the main body 16 is better, and the cooling rate is more similar. Therefore, the possibility of appearance problems such as flow marks caused by excessive difference in cooling rate is further reduced.

[0067] Furthermore, since the annular groove 14 is located on the inner wall of the plastic shell 1, even if the molten plastic shrinks at the lower end of the plastic shell 1 during the injection molding process, the annular groove 14 can change the direction of shrinkage, causing the shrinkage surface to transfer to the inner surface of the plastic shell 1. Since the inner surface of the plastic shell 1 is not an external surface, it cannot be directly seen by the user after assembly, thus greatly improving the appearance quality of the plastic shell 1.

[0068] Since the annular groove 14 effectively reduces the probability of appearance defects in the plastic shell 1 during injection molding, there is no need for special operations such as increasing pressure and extending cooling time during processing. On the contrary, the holding pressure and cooling time can be appropriately reduced to improve the processing accuracy of the plastic shell 1, reduce the dimensional error of the plastic shell 1, and enable it to be reliably assembled with the bottom cover 2, thereby improving the product yield. It can also reduce the burrs on the plastic shell 1, making the edges of the plastic shell 1 more rounded and smooth, and improving the user's feel.

[0069] In summary, this utility model can simultaneously solve the contradictory problems of appearance defects caused by product shrinkage and large dimensional processing errors of the plastic shell 1 leading to difficulty in assembling it with the bottom cover 2. It greatly improves the processing accuracy and appearance quality of the plastic shell 1 of the electric kettle, and enhances the overall aesthetics and quality of the machine.

[0070] It is understandable that, since the annular groove 14 is provided on the inner wall of the plastic shell 1 and the annular groove 14 is located above the mating rib 11, the presence of the annular groove 14 reduces the wall thickness of a local area of ​​the main body 16. The reduction in wall thickness will affect the structural strength of the mating rib 11, and there is a risk of deformation or breakage when the mating rib 11 and the mating part 21 of the bottom cover 2 are mated.

[0071] Therefore, in a preferred embodiment of this utility model, such as Figure 3 As shown, the depth of the annular groove 14 in the radial direction of the plastic shell 1 is less than the thickness of the mating rib 11.

[0072] It is understood that the annular groove 14 is provided on the inner wall of the plastic housing 1, and the annular groove 14 has an opening 512 that is horizontally oriented toward the center of the plastic housing 1.

[0073] In this embodiment, by designing the depth of the annular groove 14 to be less than the thickness of the mating rib 11, the annular groove 14 can achieve the process of removing excess glue from the plastic shell 1 and reduce the appearance defects of the plastic shell 1, while ensuring the structural strength of the mating rib 11 and the lower end of the main body 16, reducing the possibility of deformation or breakage of the main body 16 and the mating rib 11, and ensuring a stable and reliable fit with the bottom cover 2.

[0074] It should be noted that this embodiment does not limit the structure of the annular groove 14. When the bottom wall of the annular groove 14 (the groove wall located on the outer side along the radial direction of the plastic shell 1) is a planar structure, its depth is the distance from the plane of the bottom wall along the radial direction of the plastic shell 1 to the groove opening. When the bottom wall of the annular groove 14 is a curved surface (such as an arc surface, inclined surface, etc.), its depth is the maximum distance from the curved surface along the radial direction of the plastic shell 1 to the groove opening.

[0075] This embodiment does not limit the structure of the mating rib 11. In one embodiment, the thickness of the mating rib 11 remains constant from top to bottom, making the mating rib 11 a vertical wall structure, in which case the thickness of each region of the mating rib 11 is the same. As a preferred embodiment, such as... Figure 3 As shown, the thickness of the mating rib 11 gradually decreases from top to bottom, and the bottom surface of the mating rib 11 is provided with a mating plane 111. The depth of the annular groove 14 in the radial direction of the plastic shell 1 is less than the width of the mating plane 111 in the radial direction of the plastic shell 1.

[0076] Due to the limitations of the overall structure and shape of the electric kettle, the mating part 21 of the bottom cover 2 may be a vertical wall structure, or it may be a sloping wall or an arc-shaped wall structure that gradually expands outward from bottom to top. When the mating part 21 is set at an angle, if the mating rib 11 is a vertical wall with the same thickness from top to bottom, it will cause the upper edge of the mating part 21 to lift up relative to the outer surface of the plastic shell 1 after the two are mated. This will result in a large step difference at the mating position of the plastic shell 1 and the bottom cover 2, affecting the overall appearance uniformity and the feel of use.

[0077] In this embodiment, the thickness of the mating rib 11 gradually decreases from top to bottom. On the one hand, this better adapts to the arc-shaped or inclined mating part 21, making the upper edge of the mating part 21 fit more closely to the outer surface of the plastic shell 1, reducing the gap at the mating point. On the other hand, due to the change in the thickness of the mating rib 11, a guide slope is also formed on its outer surface. When assembling with the mating part 21, the mating part 21 can be more easily aligned and assembled by the guidance of the guide slope, improving the positioning effect during assembly. The depth of the annular groove 14 is less than the width of the mating plane 111 at the bottom of the mating rib 11, further limiting the depth of the annular groove 14 and ensuring the structural strength of the plastic shell 1 in the area above the mating rib 11.

[0078] As a preferred option, such as Figure 3 As shown, the depth of the annular groove 14 in the radial direction of the plastic shell 1 is W, and the width of the mating plane 111 in the radial direction of the plastic shell 1 is W1, where W = W1 - 0.5.

[0079] In order to process the annular groove 14 structure on the inner wall of the plastic shell 1, a protrusion structure needs to be set at the corresponding position of the mold. However, when the mold is demolded after molding, the groove wall of the annular groove 14 will interfere with the protrusion structure of the mold, making demolding difficult. In addition, during this process, the protrusion structure of the mold and the plastic shell 1 will generate a large extrusion force, which can easily cause irreversible plastic deformation or damage to the plastic shell 1, resulting in a change in the shell size or even scrapping.

[0080] As a preferred embodiment of this utility model, such as Figure 3 As shown, the annular groove 14 and the inner wall of the plastic shell 1 are transitioned by a transition surface 141. By using curved surfaces to transition between the annular groove 14 and the inner wall of the plastic shell 1 on both the upper and lower sides, the smoothness of the transition between the annular groove 14 and the inner wall of the shell is improved, avoiding sharp corners. This allows the protruding structure of the mold to be smoothly guided out of the annular groove 14 via the transition surface 141, thus completing the demolding.

[0081] Specifically, such as Figure 3 As shown, the annular groove 14 has a slot that is horizontally oriented toward the center of the plastic shell 1, and the transition surface 141 is located at the transition position between the upper and lower sides of the annular groove 14 and the inner wall of the plastic shell 1.

[0082] Furthermore, such as Figure 3 As shown, the transition surface 141 has a raised portion 142 protruding towards the interior of the plastic shell 1. The raised portion of the transition surface 141 towards the interior of the plastic shell 1 improves the guiding effect on the raised structure on the mold, making it easier for the raised structure of the mold to slide out of the annular groove 14 without getting stuck with the groove wall of the annular groove 14, thus ensuring smooth demolding.

[0083] Of course, in other embodiments, the transition surface 141 may also protrude outwards from the outer side of the housing. Alternatively, the transition surface 141 may also be a sloped structure, which is not limited here.

[0084] It is understandable that the greater the curvature of the transition surface 141, the greater its degree of bending, and the smaller the curvature, the smoother its transition. Therefore, in order to ensure smooth demolding, the curvature of the transition slope should be as small as possible.

[0085] Preferably, such as Figure 3 As shown, the annular groove 14 has a bottom groove wall 15, and the mating space 12 has a horizontally extending stepped surface 13. The distance H between the lower edge of the bottom groove wall 15 and the stepped surface 13 in the axial direction of the plastic shell 1 is 1mm to 2mm.

[0086] Specifically, such as Figure 3 As shown, the stepped surface 13 forms the top wall of the mating space 12, and the stepped surface 13 and the outer wall of the mating rib 11 enclose the mating space 12.

[0087] The mating rib 11 is a cantilever structure with its upper end fixed to the main body 16 and its lower end free. When it is subjected to radial inward or outward compressive force along the plastic shell 1, it will swing inward or outward around the top. At this time, the position of the mating rib 11 with the greatest force is at the top, that is, the position where it is connected to the main body 16. The annular groove 14 is located above the mating rib 11, which will reduce the structural strength of a local area of ​​the main body 16 to a certain extent. In this embodiment, by limiting the height of the annular groove 14, it not only solves the problem of appearance defects caused during the molding process of the plastic shell 1, but also keeps it far away from the step surface 13, that is, the top of the mating rib 11, thereby ensuring the structural strength of the top area of ​​the mating rib 11 and avoiding damage to the mating rib 11 when subjected to large compressive force.

[0088] If the annular groove 14 is too far from the stepped surface 13 in the axial direction of the plastic shell 1, although it can better improve the structural strength of the mating rib 11, it cannot effectively suppress phenomena such as shrinkage at the bottom of the plastic shell 1 during the molding process. Conversely, if the annular groove 14 is too close to the stepped surface 13 in the axial direction of the plastic shell 1, although it has a better suppressive effect on defects such as shrinkage, it will lead to a significant decrease in the structural strength of the mating rib 11. Therefore, by adjusting the distance between the lower edge of the bottom groove wall 15 and the stepped surface 13 in the axial direction of the plastic shell 1 (…),… Figure 3 The H) is designed to be 1mm to 2mm thick, which can take into account the appearance defects generated during the molding process of the bottom of the plastic shell 1, as well as the structural strength of the rib 11, and greatly improve the overall quality of the plastic shell 1.

[0089] Specifically, the processing method of the plastic shell 1 of this utility model is as follows:

[0090] like Figure 6 , Figure 7 As shown, during the molding process of the plastic shell 1, a male mold core 3, a female mold core (not shown in the figure), and a push plate 4 are required. The female mold core is fitted outside the male mold core 3, forming a flow channel between them for the molten plastic to pass through and be formed into the plastic shell 1. The push plate 4 surrounds the outer periphery of the male mold core 3, and the position of the push plate 4 corresponds to the position of the mating rib 11. A flow channel for forming the mating rib 11 is formed between the push plate 4 and the male mold core 3. The lower end of the female mold core abuts against the top surface of the push plate 4, so that the position of the push plate 4 forms a mating space 12 for the plastic shell 1. The top surface of the push plate 4 constitutes a stepped surface 13 of the mating space 12. The outer periphery of the male mold core 3 is provided with an annular boss structure for forming an annular groove 14 on the inner wall of the plastic shell 1.

[0091] After injection molding is completed, according to Figure 7 The mold opens in the direction indicated by the middle arrow, that is, the plastic shell 1 moves upward relative to the male mold core 3. When the annular boss structure comes out downward from the annular groove 14, it forms an outward extrusion on the main body 16 and the mating rib 11, causing the lower end of the main body 16 and the mating rib 11 to undergo slight deformation, so that the male mold core 3 is completely demolded from the plastic shell 1. After demolding, the bottom end of the plastic shell 1 rebounds and returns to its original position under the elasticity of the plastic itself.

[0092] In existing technology, the lid 5 typically includes a top cover, a bottom cover, and a mounting bracket located between the two. The opening component 53 is fixed to the mounting bracket, which serves to fix the opening component 53 and guide its movement. However, this type of lid 5 has several drawbacks. Firstly, due to the large number of structural components, the lid 5 is thick and heavy, resulting in a greater impact force on the rotating connection when opening and closing, which can easily lead to breakage at the connection between the lid 5 and the body 8. Secondly, the large number of components also restricts assembly efficiency, resulting in low production efficiency. Simply eliminating the mounting bracket would lead to a large contact area between the opening component 53 and the bottom cover, generating significant frictional resistance and severely affecting the smoothness of the opening component 53's movement, causing a jamming sensation. Furthermore, since the bottom cover can directly contact the high-temperature steam or food inside the inner pot 7, its temperature is high. Heat is transferred to the opening component 53 through the contact area, causing the opening component 53 to overheat. Users would then need to directly touch the opening component 53 to open the lid, which is inconvenient for user operation.

[0093] Therefore, as a preferred embodiment of this utility model, such as Figures 8 to 10As shown, the electric kettle includes a kettle body 8 and a kettle lid 5 rotatably connected to the kettle body 8. The kettle lid 5 includes an upper lid 51, a lower metal lid 52, and an opening assembly 53 located between the upper lid 51 and the lower metal lid 52. The opening assembly 53 is fixed to the upper lid 51 and can reciprocate horizontally between the upper lid 51 and the lower metal lid 52. The opening assembly 53 includes a locking part 532 for locking with the kettle body 8.

[0094] Preferably, the top cover 51 is made of plastic, which has a good heat insulation effect and is simpler to process and manufacture, as well as to set colors and patterns, which helps to improve the overall appearance quality of the electric kettle.

[0095] In this embodiment, the lid opening component 53 is fixed to the upper cover 51, enabling the upper cover 51 to perform the functions of fixing and guiding the movement of the lid opening component 53. This eliminates the need for a mounting bracket, reduces the number of parts in the lid 5, and not only helps to reduce the overall thickness and weight of the lid 5, making operation easier for the user, but also reduces the impact force on the connection between the lid 5 and the body 8, ensuring a stable connection between the two. Moreover, the reduction in the number of parts also reduces the assembly difficulty of the lid 5 and improves assembly efficiency.

[0096] Specifically, such as Figure 10 As shown, the top surface of the lid 51 is provided with a handle groove 511, and the side wall of the handle groove 511 is provided with an opening 512 for a portion of the lid opening component 53 to extend out. The user can insert his / her finger into the handle groove 511 and push the lid opening component 53 horizontally to make it move so that the lid opening component 53 can be unlocked from the kettle body 8.

[0097] Preferably, such as Figure 8 , Figure 9 As shown, the kettle body 8 includes an inner liner 7, a plastic outer shell 1, and a handle 6 disposed on one side of the plastic outer shell 1. The kettle lid 5 can be rotatably connected to the inner liner 7, or rotatably connected to the plastic outer shell 1 or the handle 6, which is not limited here.

[0098] like Figure 10 As shown, the inner liner 7 has a locking opening 71 on its side wall. The horizontally extending locking part 532 is inserted into the locking opening 71 to form a locking between the lid 5 and the body 8. When the lid opening component 53 moves horizontally until the locking part 532 is pulled out from the locking opening 71, the lid 5 and the body 8 are unlocked.

[0099] Furthermore, such as Figure 11 , Figure 12 As shown, the locking part 532 has a contact protrusion 533 on the side facing the metal lower cover 52, so that the cover opening assembly 53 contacts the metal lower cover 52 through the contact protrusion 533.

[0100] The opening assembly 53 contacts the metal lower cover 52 via the contact protrusion 533 on the bottom surface of the locking part 532. This reduces the contact area between the opening assembly 53 and the metal lower cover 52, thereby reducing the frictional resistance between them. This makes the opening assembly 53 move more smoothly and reduces the feeling of jamming when the user operates the opening assembly 53, improving the user's operating experience. On the other hand, the reduced contact area also reduces the heat transferred from the metal lower cover 52 to the opening assembly 53 through contact, keeping the opening assembly 53 at a lower temperature. This not only improves the user's tactile experience but also reduces the possibility of deformation of the opening assembly 53 at high temperatures.

[0101] This embodiment does not limit the contact method between the contact protrusion 533 and the metal lower cover 52. In one embodiment, the bottom surface of the contact protrusion 533 is a planar structure so that the contact protrusion 533 and the metal lower cover 52 are in surface contact. In another embodiment, the bottom surface of the contact protrusion 533 is provided with a spherical surface, an arc surface, or a pointed tip so that the contact protrusion 533 and the metal lower cover 52 are in line contact or point contact, thereby further reducing the contact area between the two.

[0102] Preferably, such as Figure 11 As shown, the contact protrusions 533 are two protruding structures, and are spaced apart on the locking portion 532 along a direction perpendicular to the movement direction of the opening assembly 53. Of course, the contact protrusions 533 can also be configured with other structures, such as strip-shaped rib structures, etc., and their number and arrangement can also take other forms.

[0103] like Figure 11 As shown, the lid opening assembly 53 includes an operating part 531 and a locking part 532, which are located in different positions. The operating part 531 is located in the central area of ​​the upper cover 51 for easy operation by the user, while the locking part 532 extends horizontally to the edge of the lid 5 for locking with the body 8. Therefore, simply guiding a part of the lid opening assembly 53 will result in poor guiding effect, and may even lead to partial misalignment or jamming of the lid opening assembly 53. As a preferred embodiment, such as... Figure 10 , Figure 11 As shown, a portion of the operating part 531 is exposed on the upper shell, the locking part 532 is connected to the operating part 531, and the upper cover 51 is provided with a first guide rib 514 located on both sides of the operating part 531 and a second guide rib 515 located on both sides of the locking part 532. The first guide rib 514 and the second guide rib 515 both extend along the movement direction of the cover opening assembly 53.

[0104] The upper cover 51 is provided with a first guide rib 514 and a second guide rib 515. The first guide rib 514 is located on both sides of the operating part 531, and the second guide rib 515 is located on both sides of the locking part 532. During the movement of the cover opening assembly 53, the first guide rib 514 guides the movement of the operating part 531, and the second guide rib 515 guides the movement of the locking part 532. This simultaneously guides multiple parts of the cover opening assembly 53, greatly improving the guiding effect and ensuring that the cover opening assembly 53 moves reliably and smoothly as a whole. Furthermore, the guide ribs are all located on both sides and extend along the movement direction of the cover opening assembly 53, restricting the movement of the cover opening assembly 53 within the channel formed by the guide ribs on both sides. This ensures that the cover opening assembly 53 can only reciprocate along the extension direction of the channel and will not deviate.

[0105] like Figure 11 As shown, the first guide rib 514 is located on both sides of the operating part 531 along a direction perpendicular to the movement direction of the opening assembly 53, and can directly contact the wall of the operating part 531 to guide it. The second guide rib 515 is located on both sides of the locking part 532 along a direction perpendicular to the movement direction of the opening assembly 53, and can directly contact the wall of the locking part 532 to guide it. Of course, in other embodiments, the operating part 531 and the locking part 532 may also be provided with sliding groove structures extending along the movement direction of the opening assembly 53, which cooperate with the first guide rib 514 and the second guide rib 515 respectively to form guidance, which is not limited here.

[0106] Preferably, such as Figure 12 As shown, the top surface of the cover 51 is provided with a handle groove 511, and the side wall of the handle groove 511 is provided with an opening 512 for a portion of the cover opening assembly 53 to extend out. The operating part 531 has a button plate 5311 extending from the opening 512. A vertical gap L1, preferably 0.7 mm, exists between the top surface of the button plate 5311 and the upper edge of the opening 512; a vertical gap L2, preferably 0.5 mm, exists between the bottom surface of the button plate 5311 and the lower edge of the opening 512. Figure 12 As shown, the locking part 532 extends from below the hand groove 511 to the edge of the lid 5. The top surface of the locking part 532 and the inner wall surface of the upper cover 51 corresponding to the bottom of the hand groove 511 have a vertical gap L3, which is preferably 0.5mm. The bottom surface of the locking part 532 and the metal lower cover 52 have a vertical gap L4, which is preferably 1.6mm. The contact protrusion 533 on the bottom surface of the locking part 532 contacts the metal lower cover 52.

[0107] Preferably, such as Figures 11 to 13As shown, the upper cover 51 is provided with a mounting base 513, which is located on one side of the cover opening component 53. When the cover opening component 53 is unlocked, it moves toward the mounting base 513. An elastic reset member 516 and a limiting rib 517 are provided between the mounting base 513 and the cover opening component 53. The limiting rib 517 is used to limit the movement of the cover opening component 53.

[0108] The elastic reset member 516 between the mounting base 513 and the opening assembly 53 provides a reset force to the opening assembly 53. When the user pushes the opening assembly 53 to open the lid, it moves towards the mounting base 513, and the elastic reset member 516 is compressed and stores force. When the user releases the opening assembly 53, the elastic reset member 516 pushes the opening assembly 53 back to its original position under the action of elastic force. Furthermore, a limiting rib 517 is located between the mounting base 513 and the opening assembly 53, i.e., on the movement path of the opening assembly 53, to limit the movement of the opening assembly 53. In the initial state, the distance between the opening assembly 53 and the limiting rib 517 is the maximum movement of the opening assembly 53. This makes the movement of the opening assembly 53 more reliable, and by designing the above distance, the opening assembly 53 will not completely retract into the upper cover 51, thus avoiding interference between the opening assembly 53 and the upper cover 51 and the inability to reset properly.

[0109] As a preferred option, such as Figure 11 As shown, the elastic reset element 516 is a spring, which is horizontally arranged. The mounting base 513 and the cover opening assembly 53 are each provided with a guide post 5131 extending horizontally along the movement direction of the cover opening assembly 53. The two ends of the spring are sleeved on the outside of the guide post 5131. Figure 11 As shown, the limiting ribs 517 are located on both sides of the elastic reset member 516 in a direction perpendicular to the movement direction of the cover opening assembly 53. Figure 11 As shown, the limiting rib 517 includes a stop section 5171 extending in a direction perpendicular to the movement direction of the cover opening assembly 53, and a reinforcing section 5172 extending in the movement direction of the cover opening assembly 53. The stop section 5171 is used to cooperate with the stop of the cover opening assembly 53 to limit the movement of the cover opening assembly 53, and the reinforcing section 5172 is used to improve the structural strength of the limiting rib 517.

[0110] In a preferred embodiment, such as Figures 12 to 16 As shown, the metal lower cover 52 includes a bottom wall and a side wall. The side wall has a guide hole 521, and the locking part 532 passes through the guide hole 521 to lock with the body 8.

[0111] When the lid opening assembly 53 only engages with the upper lid 51, its structural and positional correlation with the lower metal lid 52 is poor, making it prone to relative wobbling and resulting in a relatively loose overall structure for the lid 5. In this embodiment, the locking part 532 passes through the guide hole 521 on the side wall of the lower metal lid 52 and locks with the body 8. This improves the structural correlation between the lid opening assembly 53 and the lower metal lid 52, making the overall structure of the lid 5 more compact. Furthermore, the guide hole 521 also guides the locking part 532, ensuring that it can only reciprocate along the opening direction of the guide hole 521. The wall of the guide hole 521 acts as a stop for the locking part 532, preventing it from shifting.

[0112] Furthermore, such as Figure 11 , Figures 13 to 16 As shown, the locking part 532 includes a body 5321 and a locking tongue 5322. The cross-sectional area of ​​the locking tongue 5322 is smaller than that of the body 5321 to form a stepped stop surface 5323 between the two. The locking tongue 5322 passes through the guide hole 521, and the stepped stop surface 5323 abuts against the side wall. The upper cover 51 is provided with a limiting rib 517 located on one side of the opening assembly 53 and used to limit the movement of the opening assembly 53. The distance between the opening assembly 53 and the limiting rib 517 in the movement direction is smaller than the length of the locking tongue 5322 in the movement direction of the opening assembly 53.

[0113] Because the locking tongue 5322 is engaged with the guide hole 521, if the locking tongue 5322 comes out of the guide hole 521, when they are re-engaged, the locking tongue 5322's movement will cause misalignment, making it impossible to complete the engagement. Simultaneously, the presence of the guide hole 521 allows steam inside the inner liner 7 and liquid on the outer side of the metal lower cover 52 when the lid is closed, as well as liquid on the outer side of the metal lower cover 52 when the lid is open, to enter the cavity between the upper cover 51 and the metal lower cover 52 through the guide hole 521. This contaminates the inside of the lid 5 and, over time, produces an unpleasant odor.

[0114] In this embodiment, a stepped stop surface 5323 is provided between the main body 5321 and the locking tongue 5322. The locking tongue 5322 passes through the guide hole 521, so that in the initial state (the state in which the user does not drive the opening assembly 53 to move), the stepped stop surface 5323 abuts against the inner side wall of the metal lower cover 52, thereby sealing the gap between the guide hole 521 and the locking tongue 5322, making it difficult for steam and liquid to enter between the upper cover 51 and the metal lower cover 52 through the gap.

[0115] Furthermore, the movement of the cover opening assembly 53 is limited by the limiting rib 517, so that its movement is less than the length of the locking tongue 5322. Therefore, when the cover opening assembly 53 moves to the limit position, the locking tongue 5322 will not come out of the guide hole 521. The two always maintain the plug-in engagement state, thereby maintaining the reliable engagement between the two and avoiding the need for the locking tongue 5322 to be re-aligned with the guide hole 521 when resetting. This reduces the possibility that the cover opening assembly 53 will not be able to move and reset due to the misalignment between the two.

[0116] Preferably, the lower metal cover 52 is provided with a reflux hole 522 so that the liquid between the upper cover 51 and the lower metal cover 52 can drip into the inner liner 7 through the reflux hole 522.

[0117] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0118] 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.

[0119] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. An electric kettle, comprising an inner liner, a plastic outer shell located outside the inner liner, and a bottom cover located below the plastic outer shell, characterized in that, The plastic shell includes a main body and a mating rib extending downward from the lower end of the main body. A mating space is formed between the mating rib and the bottom of the main body. The bottom cover is provided with a mating part located within the mating space and surrounding the outside of the mating rib. The inner wall of the main body is provided with an annular groove extending circumferentially along the plastic shell. The annular groove is located above the mating rib.

2. The electric kettle according to claim 1, characterized in that, The depth of the annular groove in the radial direction of the plastic shell is less than the thickness of the mating rib.

3. The electric kettle according to claim 2, characterized in that, The thickness of the mating rib gradually decreases from top to bottom, and the bottom surface of the mating rib is provided with a mating plane. The depth of the annular groove in the radial direction of the plastic shell is less than the width of the mating plane in the radial direction of the plastic shell.

4. The electric kettle according to claim 1, characterized in that, The annular groove transitions to the inner wall of the plastic shell via a transition surface, which has a raised portion protruding toward the interior of the plastic shell.

5. The electric kettle according to claim 1, characterized in that, The annular groove has a bottom groove wall, the mating space has a horizontally extending stepped surface, and the distance between the lower edge of the bottom groove wall and the stepped surface in the axial direction of the plastic shell is 1mm to 2mm.

6. The electric kettle according to claim 1, characterized in that, The electric kettle includes a kettle body and a lid rotatably connected to the kettle body. The lid includes an upper cover, a lower metal cover, and an opening assembly located between the upper cover and the lower metal cover. The opening assembly is fixed to the upper cover and is capable of horizontal reciprocating movement between the upper cover and the lower metal cover. The opening assembly includes a locking part for locking with the kettle body. The locking part has a contact protrusion on the side facing the lower metal cover so that the opening assembly contacts the lower metal cover through the contact protrusion.

7. The electric kettle according to claim 6, characterized in that, The opening assembly also includes an operating part, a portion of which is exposed on the upper shell. The locking part is connected to the operating part. The upper cover is provided with a first guide rib on both sides of the operating part and a second guide rib on both sides of the locking part. Both the first guide rib and the second guide rib extend along the movement direction of the opening assembly.

8. The electric kettle according to claim 6, characterized in that, The upper cover is provided with a mounting base, which is located on one side of the cover opening assembly. An elastic reset member and a limiting rib are provided between the mounting base and the cover opening assembly. The limiting rib is used to limit the movement of the cover opening assembly.

9. The electric kettle according to claim 6, characterized in that, The metal lower cover includes a bottom wall and a side wall. The side wall has a guide hole, and the locking part passes through the guide hole to lock with the body of the kettle.

10. The electric kettle according to claim 9, characterized in that, The locking part includes a body and a latch. The cross-sectional area of ​​the latch is smaller than that of the body to form a stepped stop surface between them. The latch passes through the guide hole, and the stepped stop surface abuts against the side wall. The upper cover is provided with a limiting rib located on one side of the opening assembly and used to limit the movement of the opening assembly. The distance between the opening assembly and the limiting rib in the movement direction is smaller than the length of the latch in the movement direction of the opening assembly.

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