Cooking appliance

Abstract

A cooking appliance, comprising: a cooker body (10); a lid body assembly (20), the front portion of which being provided with a latching base part (21a); a locking mechanism (30), movably arranged on the lid body assembly (20) and having a locking state for locking the cooker body (10) and an unlocking state for unlocking the cooker body (10); a clip mechanism (40), rotatably arranged on the cooker body (10), wherein the clip mechanism (40) matches the latching base part (21a) to have a dual-latching state and a latching release state; a transmission mechanism (50), comprising a rotating member (51) rotatably arranged on the lid body assembly (20) and a linkage member (52) arranged between the rotating member (51) and the locking mechanism (30); and an unlocking operation part (60), wherein the unlocking operation part (60) is movably arranged on the cooker body (10), and the unlocking operation part (60) is in driving fit with the clip mechanism (40) or is in driving fit with the rotating member (51).

Description

[0001] FIELD OF THE INVENTION The present invention relates to the field of small household appliances, and more specifically, to a cooking appliance. In related art, a cooking appliance comprises a pot body and a lid. To ensure a stable connection between the lid and the pot body, a double locking structure is provided between the lid and the pot body. The first locking structure is formed by a locking cover on the lid and a pot body within the pot body, via teeth on the lid and pot, while the second locking structure is formed by a latch on the lid and a buckle on the pot body. The first locking structure requires rotating a handle on the lid to unlock, while the second locking structure requires pressing a button on the pot body to unlock. Therefore, when a user needs to open the lid, they must first rotate the handle and then press the button to unlock, which is a complex operation and poor user experience. In related art, Chinese Utility Model Patent Application No. 202221673921.0 provides a cooking appliance that addresses the aforementioned problem of complex lid opening operations. The aforementioned patent comprises a lid opening button, a drive lever, a transmission lever, a transmission plate, and a caliper structure. Pressing the lid opening button applies force to the drive lever, causing the hook portion of the drive lever to separate from the latching plate of the lid. The hook portion of the drive lever no longer constrains the transmission lever, allowing the transmission lever to move forward and the caliper structure to switch to an unlocked state. This achieves dual unlocking by simply pressing the lid opening button, simplifying user operation. However, in actual use, the solution of the aforementioned patent can cause difficulty in opening the lid, resulting in difficulty or even inability to open the lid. SUMMARY OF THE INVENTION The primary objective of the present invention is to provide a cooking appliance that addresses the problem of difficulty in opening the lid, resulting in difficulty or even inability to open the lid, as described in the related art. To achieve the above-mentioned object, the present invention provides a cooking utensil, comprising: a pot body; a cover assembly, which is openably and closably arranged on the pot body, wherein the rear portion of the cover assembly is connected to the pot body, and the front portion of the cover assembly is provided with a latching portion, and the cover assembly has an open state and a closed state; a locking mechanism, which is movably arranged on the cover assembly and has a locked state for locking the pot body and an unlocked state for unlocking the pot body; a buckle mechanism, which is rotatably arranged on the pot body, and has a dual engaged state and an unlocked state for cooperating with the latching portion; a transmission mechanism, which includes a rotating member rotatably arranged on the cover assembly and a linkage member provided between the rotating member and the locking mechanism; an unlocking operation portion, which is movably arranged on the pot body, and is driven to cooperate with the buckle mechanism or the rotating member; when the buckle mechanism is in the dual engaged state, the buckle mechanism is engaged with the latching portion, and the buckle mechanism presses against the rotating member and pulls the linkage member to keep the locking mechanism in the locked state. When the buckle mechanism drives the rotating part to rotate or is driven to rotate by the rotating part,The portion of the latch mechanism connected to the latching platform can remain relatively stationary, while the latch mechanism continues to rotate and switches to a released state. Using the technical solution of the present invention, the latch mechanism can cooperate with the latching platform and the locking mechanism, enabling dual engaged and released states, enabling dual locking and unlocking between the lid assembly and the pot body. When the latch mechanism is in a dual engaged state, the latch mechanism engages the latching platform while the locking mechanism is locked, doubly locking the lid assembly and the pot body. In this state, the cooking appliance can perform pressure cooking. When the latch mechanism is in a released state, the latch mechanism separates from the latching platform while the locking mechanism is unlocked, unlocking the lid assembly and the pot body. At this point, the lid assembly switches from a closed state to an open state. In this solution of the present invention, when the latch mechanism drives the rotating member to rotate, the portion of the latch mechanism connected to the latching platform can remain relatively stationary, while the latch mechanism continues to rotate and switches to the released state. In the prior art, for solutions where the latch mechanism cooperates with both the latching platform and the locking mechanism, the lid assembly moves upward relative to the pot body during the movement of the locking mechanism. This makes the unlocking process of the locking mechanism susceptible to interference from other components, resulting in laborious pressing and awkward or even difficult lid opening. When the latch mechanism drives the rotating member to rotate, the latch mechanism remains engaged with the latching platform and, therefore, remains stationary. The position of the lid assembly relative to the pot body remains unchanged. In this state, the latch mechanism continues to rotate and switches to the unlocked state. Specifically, the latch mechanism can release the rotating member simultaneously or before separating from the latching platform, allowing the locking mechanism to switch from the locked to the unlocked state. This prevents the movement of the locking mechanism from interfering with other components within the lid assembly, resulting in smoother movement and improved opening or closing of the lid assembly. Therefore, the technical solution of the present invention can address the problem of laborious pressing during lid opening, which can lead to awkward or even impossible lid opening. Furthermore, the cooking appliance further comprises an unlocking operation part, which is movably provided on the pot body and is driven and cooperated with the buckle mechanism. When the cover assembly needs to be opened, the user presses the unlocking operation part, and the unlocking operation part can drive the buckle mechanism to switch from the double-engaged state to the unlocked state. Further, the cooking appliance further comprises an unlocking operation part, which is movably provided on the cover assembly and is driven and cooperated with the rotating member. When the cover assembly needs to be opened, the user presses the unlocking operation part, and the unlocking operation part can drive the rotating member to rotate, thereby driving the buckle mechanism to switch from the double-engaged state to the unlocked state. Further, the buckle mechanism comprises a first buckle and a second buckle, and the first buckle and the second buckle are both rotatably provided on the pot body, wherein, when the buckle mechanism is in the double-engaged state,The second buckle engages with the platform, while the first buckle abuts against the rotating member and pulls the linkage to maintain the locking mechanism in the locked state. When the buckle mechanism is in the unlocked state, the second buckle disengages from the platform, releasing the rotating member and maintaining the locking mechanism in the unlocked state. This structure effectively ensures that when the first buckle drives the rotating member to rotate, the second buckle remains relatively stationary in its connection with the platform, while the first buckle continues to rotate and switches to the unlocked state. Furthermore, the first buckle includes a first rotating plate and a first hook disposed at the end of the first rotating plate, and the second buckle includes a second rotating plate and a second hook disposed at the end of the second rotating plate. A clearance space is provided between the first and second hooks, allowing the second hook to clear the first hook when the first buckle rotates relative to the second. This structure enables both independent rotation of the first buckle relative to the second buckle and synchronized motion between the two. It is simple, easy to implement, and easily controllable in motion. Furthermore, the first hook has a first protruding dimension L1 protruding from the first rotating plate, and the second hook has a second protruding dimension L2 protruding from the second rotating plate. The first protruding dimension L1 and the second protruding dimension L2 satisfy the relationship L1 N 1.5 L2. This structure ensures the rotational capacity of the first buckle relative to the second buckle, thereby ensuring the locking stability of the locking mechanism driven by the first buckle. Furthermore, the cooking appliance includes a first return member disposed between the pot body and the first buckle, and a second return member disposed between the pot body and the second buckle. The first return member is capable of maintaining the first buckle in a vertical position, and the second return member is capable of maintaining the second buckle in a vertical position. Furthermore, the pot body includes an inner pot with a pot opening flange. The linkage includes a slide plate with a slide groove. The locking mechanism includes a mounting plate and a clamp mounted on the mounting plate, capable of locking or unlocking the pot opening flange. The sliding plate moves perpendicular to the mounting plate. The mounting plate is provided with a limiting post extending through the slide groove. The angle a between the slide groove and the mounting plate's movement direction is greater than or equal to 25° and less than 45°. This structure makes the cooking appliance more compact. Furthermore, the slide plate is provided with an extension groove connected to the slide groove. The extension groove is located at the end of the slide groove away from the rotating member and extends parallel to the sliding plate's movement direction. This structure allows for a certain amount of relative movement between the slide plate and the limiting post even after the locking mechanism is locked in place, thereby preventing collision between the locking mechanism and the pot opening flange. Furthermore, the buckle mechanism also has a separate buckle state. When the buckle mechanism is in the separate buckle state, the buckle mechanism is engaged with the clamping platform, the buckle mechanism releases the rotating member, and the locking mechanism switches from the locked state to the unlocked state and remains in the unlocked state.This structure facilitates smoother opening and closing of the lid assembly. Furthermore, when the latch mechanism is in the unlocked state, a first distance exists between the caliper and the pot flange. When the latch mechanism is in the single-engaged state, a second distance exists between the caliper and the pot flange, which is smaller than the first distance. This structure ensures that a constant distance exists between the caliper and the pot flange before the latch mechanism engages the latching platform. This prevents the lid assembly from moving upward relative to the pot body, causing the caliper to interfere with the pot flange and prevent the lid from closing. Furthermore, the slide plate is provided with a panel surrounding the outer periphery of the chute. The stop post is provided with a rotatable friction-reducing member located within the panel and engaging with the inner wall of the panel. This structure reduces friction caused by the stop post moving within the chute. Furthermore, the friction-reducing member is a ball bearing. This structure is simple and low-cost. Furthermore, the locking mechanism has a floating position and a lowered position. The friction-reducing member engages with the enclosure in both the floating and lowered positions. This ensures that friction on the limit post during sliding is reduced, regardless of whether pressure is applied within the inner pot. Furthermore, a receiving slot is provided at the top of the rotating member, and a linkage shaft is provided at the front end of the linkage member. The linkage shaft is located within the receiving slot, and a snap mechanism drives the lower end of the rotating member. This structure is easy to manufacture, and the coupling between the rotating member and the linkage member is smoother when the rotating member pulls the linkage member. Furthermore, the cover assembly includes a lining cover and a metal fixing plate disposed below the lining cover. The locking mechanism includes a mounting plate and a clamp disposed on the mounting plate. The mounting plate is movably mounted on the metal fixing plate, which is floatingly mounted below the lining cover via a connector. A positioning structure is provided between the middle portion of the metal fixing plate and the middle portion of the lining cover. The positioning structure achieves positioning between the center of the metal fixing plate and the center of the lining cover, preventing deformation of the lining cover surrounding the metal fixing plate and displacement of the metal fixing plate. Furthermore, the positioning structure includes a positioning hole and a positioning post disposed within the positioning hole. One of the positioning hole and the positioning post is disposed on the lining cover, and the other is disposed on the metal fixing plate. The positioning post is located at the center of the lining cover or the center of the metal fixing plate, and the positioning post and the positioning hole are locked in place. Alternatively, the positioning post may be offset from the center of the lining cover or the center of the metal fixing plate. The structure is simple and easy to implement. Furthermore, the cover assembly includes the lining cover, a first hook disposed on the slide, and a second hook disposed on the lining cover. The transmission mechanism also includes a third reset member mounted between the first and second hooks. This structure facilitates assembly of the third reset member. Furthermore, the cover assembly includes the lining cover and an inner cover disposed below the lining cover. The inner cover is provided with a floating stop rod, and the linkage member is provided with a stopper hole that engages with the stop rod. The structure is simplified and cost-effective. Furthermore,The linkage member is provided with a position detection member; alternatively, the latch mechanism is provided with a position detection member. This structure facilitates subsequent control of the cooking process. Furthermore, the lid assembly includes a lining cover, a latching portion disposed on the lining cover, and the latching portion includes a transverse plate and a vertical plate connected to the transverse plate. The latching mechanism engages with the top surface of the vertical plate. The rotating member is located above the transverse plate and behind the vertical plate. A first notch is provided in the middle of the top surface of the vertical plate to accommodate the rotating member. This configuration makes the cooking appliance more compact. According to one embodiment, the cooking appliance further includes a push mechanism, and the unlocking operation unit is driven by the push mechanism to engage with the rotating member. When the lid assembly switches from a closed state to an open state, the unlocking operation unit causes the push mechanism to rotate the rotating member, which drives the locking mechanism to switch from a locked state to an unlocked state and maintain the unlocked state, and the rotating member drives the latching mechanism to separate from the lining portion. When the unlocking operation portion drives the rotating member to rotate via the push structure, the latch mechanism remains engaged with the latching portion and thus remains stationary. At this point, the lid assembly remains in a fixed position relative to the pot body. In this state, the rotating member continues to drive the latch mechanism to rotate, switching it to a state separated from the latching portion. Specifically, simultaneously with or before the latch mechanism separates from the latching portion, the rotating member can switch the locking mechanism from a locked state to an unlocked state. This prevents the movement of the locking mechanism from interfering with other components within the lid assembly, resulting in smoother movement and, consequently, smoother opening and closing of the lid assembly. Furthermore, the push structure includes a first push member detachably mounted on the pot body and a second push member detachably mounted within the lid assembly. The unlocking operation portion is drivingly engaged with the bottom end of the first push member, the top end of the first push member engages with the bottom end of the second push member, and the top end of the second push member engages with the rotating member. The first push member is disposed in the pot body, and the second push member is disposed in the cover assembly, making the arrangement of the push structure more convenient and easily ensuring the movement range of the first and second push members. Furthermore, the unlocking operation portion includes a button, and the push structure also includes a third push member. The unlocking operation portion drives the third push member to move in the horizontal direction, and the top end of the third push member cooperates with the bottom end of the first push member via a driving inclined surface. The above structure conforms to the user's operating habits and improves the user experience of the product. Furthermore, the push structure also includes a fourth reset member disposed between the cover assembly and the second push member. The fourth reset member applies an elastic force to the second push member to keep the second push member in the lowered position. The above fourth reset member can ensure that the second push member remains in the lowered position when not subjected to a push force, thereby preventing the second push member from contacting the rotating member. Furthermore, the cover assembly has a mounting platform with a mounting hole. The second push member includes a push rod and a limit plate disposed on the push rod.The push rod is inserted into the mounting hole. A mounting bracket is provided above the mounting platform. A limit plate is located between the mounting platform and the mounting bracket. The fourth reset member is disposed between the mounting bracket and the limit plate. This structure facilitates the installation of the second push member and the fourth reset member while ensuring the operational stability of the second push member. Furthermore, the rotating member is provided with a push-up inclined surface that cooperates with the push-up structure and a first clearance portion that avoids the push-up structure. This structure makes the overall layout of the cooking appliance more rational and the structure more compact. Furthermore, the first clearance portion is a notch provided on the front surface of the rotating member. This structure is simple and easy to implement. Furthermore, the locking mechanism is provided with a second clearance portion that avoids the push-up structure. This structure makes the overall layout of the cooking appliance more rational and the structure more compact. BRIEF DESCRIPTION OF THE DRAWINGS The drawings, which constitute a part of this specification, are included to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are provided for illustrative purposes only and are not intended to unduly limit the invention. In the accompanying drawings: FIG1 is a schematic diagram of an exploded structure of a cooking utensil according to a first embodiment of the present invention; FIG2a is a cross-sectional view of the cooking utensil of FIG1 with the cover assembly in a closed state and the latch mechanism in a double-engaged state; FIG2b is a top view of the cover assembly of the cooking utensil of FIG1 with the cover assembly in a closed state and the latch mechanism in a double-engaged state; FIG2c is a cross-sectional view of the cooking utensil of FIG1 at another position with the cover assembly in a closed state and the latch mechanism in a double-engaged state; FIG2d is an enlarged view of point A of the cooking utensil of FIG2a; FIG3a is a cross-sectional view of the cooking utensil of FIG1 with the cover assembly in a closed state and the latch mechanism in a single-engaged state; FIG3b is a top view of the cover assembly of the cooking utensil of FIG1 with the cover assembly in a closed state and the latch mechanism in a single-engaged state; FIG3c is a cross-sectional view of the cooking utensil of FIG1 at another position with the cover assembly in a closed state and the latch mechanism in a single-engaged state; FIG3d is an enlarged view of point B of the cooking utensil of FIG3a; FIG3e is an enlarged view of point D of the cooking utensil of FIG3c; FIG4a is a cross-sectional view of the cooking utensil of FIG1 when the cover assembly is in a closed state and the buckle mechanism is in a released state; FIG4b is a top view of the cover assembly of the cooking utensil of FIG1 when the cover assembly is in a closed state and the buckle mechanism is in a released state; FIG4c is a cross-sectional view of the cooking utensil of FIG1 at another position when the cover assembly is in a closed state and the buckle mechanism is in a released state; FIG4d is an enlarged view of point C of the cooking utensil of FIG4a; FIG4e is an enlarged view of point E of the cooking utensil of FIG4c; FIG5 is a cross-sectional view of the cooking utensil of FIG1 when the cover assembly is in an open state; FIGFIG6 is a perspective view of the lining cover and the transmission mechanism of the cooking appliance of FIG1 ; FIG7 is a perspective structural view of the lining cover of FIG6 ; FIG8 is a perspective view of the clamping portion of the lining cover of FIG6 ; FIG9 is a perspective view of the slide plate of the cooking appliance of FIG1 ; FIG10 is a top view of the slide plate of FIG9 ; FIG11 is a perspective view of the locking mechanism of the cooking appliance of FIG1 ; FIG12 is a perspective view of the transmission member of the cooking appliance of FIG1 ; FIG13 is a perspective view of the buckle mechanism of the cooking appliance of FIG1 ; FIG14 is a cross-sectional view of the buckle mechanism of FIG13 ; FIG15 is a perspective view of a first buckle of the buckle mechanism of FIG13 ; FIG16 is a perspective view of a second buckle of the buckle mechanism of FIG13 ; FIG17 is a partial structural schematic view of the inner cover assembly of the cooking appliance of FIG1 ; FIG18 is an exploded structural schematic view of a second embodiment of the cooking appliance according to the present invention; FIG19 is a cross-sectional view of the cooking appliance of FIG18 from another angle; Figure 20 shows a stereoscopic view of the snap mechanism of Figure 13 from another angle; Figure 21 shows a stereoscopic view of the first snap of Figure 15 from another angle; Figure 22 shows a cross-sectional schematic view of the first snap of Figure 15 when it is in a linked rotation state; Figure 23 shows a cross-sectional schematic view of the snap mechanism of Figure 13 when the first snap is rotated alone to fit with the second snap; Figure 24 shows a structural schematic view of another embodiment of the snap mechanism of the cooking utensil according to the present application. FIG25a is a cross-sectional view of the cooking utensil of FIG18 with the lid assembly doubly engaged with the pot body; FIG25b is a top view of the lid assembly of the cooking utensil of FIG18 with the lid assembly doubly engaged with the pot body; FIG25c is a cross-sectional view of the cooking utensil of FIG18 at another position with the lid assembly doubly engaged with the pot body; FIG25d is an enlarged view of point A of the cooking utensil of FIG25a; FIG26a is a cross-sectional view of the cooking utensil of FIG18 with the lid assembly in a closed state and only the second buckle engaged with the latching platform; FIG26b is a top view of the lid assembly of the cooking utensil of FIG18 with the lid assembly in a closed state and only the second buckle engaged with the latching platform; FIG26c is a cross-sectional view of the cooking utensil of FIG18 at another position with the lid assembly in a closed state and only the second buckle engaged with the latching platform; FIG26d is an enlarged view of point B of the cooking utensil of FIG26a; FIG27a shows a cross-sectional view of the cooking utensil of FIG18 when the cover assembly is in a closed state and the latch mechanism is disengaged from the latching platform; FIG27b shows a top view of the cover assembly of the cooking utensil of FIG18 when the cover assembly is in a closed state and the latch mechanism is disengaged from the latching platform; FIG27c shows a cross-sectional view of the cooking utensil of FIG18 at another position ...d shows a cross-sectional view of the cooking utensil of FIG18 at another position when the cover assembly is in a closed state and the latch mechanism is disengaged from the latching platform; FIG27e shows a cross-sectional view of the cooking utensil of FIG18 at another position when the cover assembly is in a closed state and the latch mechanism is disengaged from the latching platform; FIG27f shows a cross-sectional view of the cooking utensil of FIG18 at another position when the cover assembly is in a closed state27d shows an enlarged view of the cooking appliance at point C in FIG27a. The above drawings include the following reference numerals:

[0002] 10. Pot body; 11. Inner pot; 111. Pot rim;

[0003] 20. Cover assembly; 21. Lining cover; 21a. Clamping platform; 21b. Snap-fitting surface; 211. Horizontal plate; 212. Vertical plate; 2121. First notch; 213. Second hook; 214. Positioning hole; 22. Metal fixing plate; 221. Through hole; 222. Positioning post; 23. Inner cover; 231. Temperature sensor; 24. Connector; 25. Surface cover; 26. Mounting platform; 27. Mounting bracket;

[0004] 30. Locking mechanism; 31. Mounting plate; 311. Limiting column; 312. Friction reducing member; 32. Caliper;

[0005] 40. Buckle mechanism; 41. First buckle; 411. First rotating plate; 4111. Plate body; 4112. Flanged edge; 4113. First shaft portion; 4114. First avoidance notch; 4115. First reset member connecting portion; 4116. First reset member positioning portion; 412. First hook; 4121. Rounded corner structure; 413. First limiting surface; 414. First abutting surface; 42. Second buckle; 421. Second rotating plate; 422. Second hook; 423. Second limiting surface; 4213. Second shaft portion; 4215. Second reset member connecting portion; 4216. Second reset member positioning portion; 422. Second hook; 4221. Second avoidance notch; 423. Second limiting surface; 424. Second abutting surface; 43. First avoidance portion; 44, first restoring member; 45, second restoring member; 46, avoidance space; 47, single buckle; 471, car kunzi;

[0006] 50. Transmission mechanism; 51. Rotating member; 511. Accommodating groove; 512. Pushing inclined surface; 513. Second avoidance portion;

[0007] 52, linkage member; 521, slide groove; 522, extension groove; 523, enclosure plate; 524, linkage shaft; 525, first hook;

[0008] 53. The third reset member;

[0009] 60. Unlocking operation portion; 61. Fixing ring;

[0010] 70, push structure; 71, first push member; 72, second push member; 73, third push member; 731, push rod; 732, limit plate. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the described embodiments represent only a portion of the embodiments of the present invention, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and in no way limits the present invention, its application, or use. All other embodiments devised by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that the terminology used herein is intended only to describe specific embodiments and is not intended to limit the exemplary embodiments of the present application. As used herein, unless the context clearly indicates otherwise, the singular is intended to include the plural. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof. Unless otherwise specified, the relative arrangement of components and steps, numerical expressions, and values ​​described in these embodiments do not limit the scope of the present invention. It should also be understood that, for ease of description, the dimensions of the various components shown in the drawings are not drawn to scale. Technologies, methods, and devices known to those skilled in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be considered part of this specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters denote similar items in the following figures; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures. In Chinese Utility Model Patent Application No. 202221673921.0, a snap is provided (the driving lever with a hook in that patent). This structure allows the same buckle to engage both the caliper structure and the clamping platform. The buckle simultaneously unlocks the caliper and separates it from the clamping platform, or simultaneously locks it and engages it with the clamping platform. Therefore, the buckle requires a relatively deep engagement. Consequently, during actual use, when the lid assembly switches from an open state to a closed state, the buckle's engagement point will shift, making it impossible to ensure a secure engagement.When the lid assembly needs to be opened, the latch rotates to unlock the caliper. The lid assembly is driven upward by the torsion spring at its rear, potentially causing friction between the caliper and the inner pot, preventing the caliper from disengaging. Even if the caliper is successfully unlocked, the upward movement of the lid assembly widens the gap between the pot body and the pot, increasing friction between the latch and the latch plate, making lid opening difficult. The technical solution of the present application can address this issue. The solution of the present application will be described in detail below with reference to the accompanying drawings. As shown in Figure 1, the cooking appliance of Example 1 includes: a pot body 10, a lid assembly 20, a locking mechanism 30, a latch mechanism 40, and a transmission mechanism 50. The lid assembly 20 is openably and closably mounted on the pot body 10. The rear portion of the lid assembly 20 is connected to the pot body 10, and the front portion of the lid assembly 20 is provided with a latch plate 21a. The lid assembly 20 has an open and closed state. The locking mechanism 30 is movably mounted on the lid assembly 20 and has a locked state for locking the pot body 10 and an unlocked state for unlocking the pot body 10. The latch mechanism 40 is rotatably mounted on the pot body 10 and has dual engaged and unlocked states, cooperating with the latching platform 21a. The transmission mechanism 50 includes a rotating member 51 (also known as a swinging lever) rotatably mounted on the lid assembly 20 and a linkage member 52 disposed between the rotating member 51 and the locking mechanism 30. The latch mechanism 40 is capable of driving the rotating member 51 to rotate. When the cover assembly 20 is in the closed state, the buckle mechanism 40 is subjected to force and switches from the double-locking state to the unlocked state; when the cover assembly 20 is switched from the open state to the closed state, the cover assembly 20 drives the buckle mechanism 40 to switch from the unlocked state to the double-locking state; when the buckle mechanism 40 is in the double-locking state, the buckle mechanism 40 is engaged with the platform portion 21a, the buckle mechanism 40 presses against the rotating member 51 and pulls the linkage member 52 to keep the locking mechanism 30 in the locked state; when the buckle mechanism 40 is in the unlocked state, the buckle mechanism 40 is separated from the platform portion 21a, the buckle mechanism 40 releases the rotating member 51 and the locking mechanism 30 remains in the unlocked state, and when the buckle mechanism 40 drives the rotating member 51 to rotate, the part connected to the platform portion 21a of the buckle mechanism 40 can remain relatively stationary, and the buckle mechanism 40 continues to rotate and switches to the unlocked state. By applying the technical solution of this embodiment, the latch mechanism 40 can cooperate with the latching platform 21a and the locking mechanism 30. The latch mechanism 40 has a dual latching state and a release state, which can realize dual locking and unlocking between the cover assembly 20 and the pot body 10.When the latch mechanism 40 is in a dual-engagement state (as shown in Figures 2a-2d), the latch mechanism 40 engages with the latching platform 21a, while the locking mechanism 30 is in a locked state. The lid assembly 20 and the pot body 10 are doubly locked. In this state, the cooking appliance can perform pressure cooking. When the latch mechanism 40 is in an unlocked state (as shown in Figures 4a-4d), the latch mechanism 40 is disengaged from the latching platform 21a, while the locking mechanism 30 is in an unlocked state. The lid assembly 20 and the pot body 10 are unlocked, and the lid assembly 20 switches from the closed state to the open state. In this embodiment, when the latch mechanism 40 drives the rotating member 51 to rotate, the portion of the latch mechanism 40 connected to the latching platform 21a can remain relatively stationary, and the latch mechanism 40 continues to rotate, thereby switching to the unlocked state. In the prior art, for solutions where the latch mechanism cooperates with both the latching platform and the locking mechanism, the lid assembly moves upward relative to the pot body during the movement of the locking mechanism. This makes the unlocking process of the locking mechanism susceptible to interference from other components, resulting in laborious pressing and unsmooth or even difficult lid opening. When the latch mechanism 40 drives the rotating member 51 to rotate, the latch mechanism 40 remains engaged with the latching platform 21a and remains stationary. At this time, the position of the lid assembly 20 relative to the pot body 10 remains unchanged. In this state, the latch mechanism 40 continues to rotate and switches to the unlocked state. Specifically, the latch mechanism 40 can release the rotating member 51 simultaneously with or before separating from the latching platform 21a, causing the locking mechanism 30 to switch from the locked state to the unlocked state. This ensures that the movement of the locking mechanism 30 does not interfere with other components within the lid assembly 20, resulting in smoother movement and improved opening or closing of the lid assembly 20. Therefore, the technical solution of this embodiment can solve the problem in the related art of difficulty in opening the lid due to the pressure applied during opening, which can lead to unsmooth or even impossible opening. In this embodiment, the latch mechanism 40 also has a separate latching state (as shown in Figures 3a-3d). When in this separate latching state, the latch mechanism 40 latches with the latching platform 21a, releasing the rotating member 51, and the locking mechanism 30 switches from the locked state to the unlocked state and remains in the unlocked state. When in the separate latching state, the latch mechanism 40 latches with the latching platform 21a, while the locking mechanism 30 is in the unlocked state. The lid assembly 20 and the pot body 10 are independently locked. This state is a transitional state, and the lid assembly 20 is in this state for a very short time, which facilitates smoother opening and closing of the lid assembly 20.It should be noted that in other embodiments, the single-engagement state may not exist. When the second buckle is stationary, the movement of the first buckle may not fully unlock the locking mechanism. When the first buckle is in a linked rotational state, the first buckle continues to drive the second buckle. Simultaneously with or before the second buckle separates from the engaging platform, the locking mechanism continues to complete the remaining unlocking stroke. As shown in FIG1 , the cooking appliance of Example 1 further includes an unlocking operation portion 60, which is movably disposed on the pot body 10 and operatively engaged with the engaging mechanism 40. When the lid assembly 20 needs to be opened, the user presses the unlocking operation portion 60, which drives the engaging mechanism 40 to switch from the double-engagement state to the single-engagement state, and then to the unengaged state. During this process, the locking mechanism 30 is first unlocked, followed by the separation of the engaging mechanism 40 from the engaging platform 21a, ultimately opening the lid assembly 20. Preferably, the unlocking operation part 60 is a lid opening button, which is arranged on the pot body 10 through a fixing ring 61. The unlocking operation part 60 pushes the bottom end of the buckle mechanism 40. In the first embodiment, as shown in Figures 1 and 14 to 16, the latch mechanism 40 includes a first latch 41 and a second latch 42. The first latch 41 and the second latch 42 are both rotatably disposed on the pot body 10. When the latch mechanism 40 is in a dual-engaging state, the second latch 42 is engaged with the platform portion 21a, the first latch 41 abuts against the rotating member 51, and pulls the linkage member 52 to maintain the locking mechanism 30 in the locked state. When the latch mechanism 40 is in a single-engaging state, the second latch 42 is engaged with the platform portion 21a, the first latch 41 releases the rotating member 51, and the locking mechanism 30 switches from the locked state to the unlocked state and remains in the unlocked state. When the latch mechanism 40 is in an unlocked state, the second latch 42 is separated from the platform portion 21a, the first latch 41 releases the rotating member 51, and the locking mechanism 30 remains in the unlocked state. The first latch 41 cooperates with the rotating member 51 and the linkage member 52 to control the locking and unlocking of the locking mechanism 30. The second latch 42 cooperates with the retaining plate 21a to engage or disengage with the retaining plate 21a. Furthermore, the locking mechanism 30 moves while the second latch 42 is engaged with the retaining plate 21a. Therefore, during the movement of the locking mechanism 30, the lid assembly 20 does not move upward relative to the pot body 10, thus preventing interference from other components during the locking and unlocking processes of the locking mechanism 30. During the lid opening process, after the locking mechanism 30 has completed its movement, the first latch 41 rotates the second latch 42, disengaging it from the retaining plate 21a.During the closing process, after the second latch 42 engages the latching platform 21a, the first latch 41 rotates, and the rotating member 51 and the linkage member 52 cooperate to drive the locking mechanism 30 to achieve locking. The latch mechanism includes a first latch 41 and a second latch 42. The first latch 41 is rotatably arranged and has two rotational states: one independently and the other in a coordinated rotational state. The second latch 42 is rotatably arranged and adjacent to the first latch 41. When the first latch 41 is in the independently rotating state, the second latch 42 is stationary. The first latch 41 rotates relative to the second latch 42. When the first latch 41 is in the coordinated rotational state, the first latch 41 drives the second latch 42 to rotate together. As shown in Figure 24, the latch mechanism can include only a single latch 47. In this embodiment, the portion of the single latch 47 that engages the latching platform 21a is provided with a locking ring 471, with the axis of the locking ring 471 extending horizontally. The cam 471 contacts the platform 21a to reduce friction. The platform 21a also features a gently convex curved surface on its upper surface. The cross-sectional shape of this curved surface aligns with the trajectory of the central axis of the cam 471 during rotation of the single buckle 47. This reduces resistance to movement of the single buckle 47 and keeps the cover stable and prevented from moving upward. As shown in Figures 14 to 16, the first buckle 41 includes a first rotating plate 411 and a first hook 412 disposed at the end of the first rotating plate 411. The second buckle 42 includes a second rotating plate 421 and a second hook 422 disposed at the end of the second rotating plate 421. The first and second rotating plates 411 and 421 are stacked, with a clearance space 46 defined between the first and second hooks 412 and 422. This allows the second hook 422 to clear the first hook 412 when the first buckle 41 rotates relative to the second buckle 42. This structure enables both independent rotation of the first buckle 41 relative to the second buckle 42 and synchronized motion between the two. This structure is simple, easy to implement, and easily controllable in motion. The provision of the clearance space 46 allows the second buckle 42 to remain stationary while the first buckle 41 can independently rotate relative to the second buckle 42, allowing the first buckle 41 to rotate from the state shown in Figure 2d to the state shown in Figure 3d. When the first hook 412 of the first buckle 41 rotates to engage the second hook 422 of the second snap 42, the first hook 412 drives the second hook 422 to rotate outward together, and the first buckle 41 and the second snap 42 rotate from the state shown in FIG3d to the state shown in FIG4d. In this embodiment, the second snap 42 is positioned near the first buckle 41, closer to the longitudinal axis of the pot body than the first buckle 41.In this embodiment, the first rotating plate 411 and the second rotating plate 421 are stacked. When the first hook 412 of the first buckle 41 rotates to engage the second hook 422 of the second buckle 42, the first hook 412 drives the second hook 422 to rotate outward, rotating the first and second buckles 41 and 42 from the position shown in Figure 3d to the position shown in Figure 4d. Specifically, the first hook 412 is provided with a first abutting surface 414, and the second hook 422 is provided with a second abutting surface 424. When the first buckle 41 is in the coordinated rotation state, the first abutting surface 414 abuts the second abutting surface 424, causing the first buckle 41 to rotate with the second buckle 42. This structure is simple and the movement process is easy to control. As shown in Figures 22 and 23, the first abutting surface 414 is a first inclined surface, and the second abutting surface 424 is a second inclined surface. The above structure increases the contact area between the first hook 41 and the second hook 42 when they rotate together, improving movement stability. As shown in Figures 22 and 23, when the first hook 41 is in the linked rotation state, the lowest point of the first hook 412 is flush with the lowest point of the second hook 422. This structure ensures that when the pot body 10 and lid assembly 20 switch from the unlocked state to the double-locked state, both the first hook 412 and the second hook 422 can engage and lock into place with the platform 21a. This prevents interference between the two during the reset process, which could prevent them from locking into place. Of course, as a feasible embodiment, when the first hook is in the linked rotation state, the lowest point of the first hook can also be higher than the lowest point of the second hook. This also ensures that the first and second hooks are locked into place during the reset process. In an embodiment not shown in the figures, the first hook may not be positioned outside the second hook. Instead, the first and second hooks may be positioned side by side with a linkage portion disposed between them. When the first hook reaches a predetermined position, the linkage portion drives the second hook to move. The linkage portion can be a tension spring or other structure. In one feasible embodiment, the first and second buckles engage at their lower ends. Specifically, the lower portion of the second buckle extends toward the inner pot. When the user presses the unlocking operation portion, the unlocking operation portion pushes the first buckle inward until the unlocking operation portion or the lower portion of the first buckle pushes the lower portion of the second buckle, causing the first and second buckles to move synchronously. This approach also allows the second buckle to remain relatively stationary in its connection with the platform while the first buckle drives the rotating member to rotate. Continued rotation of the first buckle then drives the second buckle to separate from the platform, achieving the unlocking operation.As shown in Figures 14 to 16, the first hook 412 has a first protrusion dimension L1 protruding from the first rotating plate 411, and the second hook 422 has a second protrusion dimension L2 protruding from the second rotating plate 421. The first protrusion dimension L1 and the second protrusion dimension L2 satisfy the relationship L1 N 1.5L2. This structure ensures the rotational capacity of the first latch 41 relative to the second latch 42, thereby ensuring the locking stability of the locking mechanism 30 driven by the first latch 41. Preferably, L1 = 1.5L2, or L1 = 2L, or L1 = 2.5L2. As shown in Figure 20, the end of the first hook 412 has a rounded corner structure 4121. The rounded corner structure 4121 facilitates control of the mating position of the first latch 41 and the platform portion 21a. Furthermore, when the first latch 41 is rotating independently, it is less likely to interfere with other structures. The first clip 41 has a first rotation axis, and the second clip 42 has a second rotation axis. In this embodiment, the first and second rotation axes are located in the same vertical plane and are not collinear. This arrangement facilitates the first clip 41 to drive the second clip 42 in rotation when in a coordinated rotational state, and the motion trajectories of both are easily controlled. In this embodiment, the first rotation axis is located below the second rotation axis. In an embodiment not shown in the figures, the first and second rotation axes are collinear for ease of assembly. As shown in Figures 15, 16, and 21, the first rotating plate 411 includes a plate body 4111 and flanges 4112 disposed on either side of the plate body 4111. The flanges 4112 are provided with a first shaft portion 4113. The second rotating plate 421 is located within the accommodation space formed by the plate body 4111 and the flanges 4112 and is provided with a second shaft portion 4213. The flanges 4112 are also provided with a first relief notch 4114 corresponding to the second shaft portion 4213. This structure allows the second buckle 42 to be housed within the first buckle 41, making the overall structure of the fastening assembly more compact. The first and second shaft portions 4113, 4213, can be pins or holes. As shown in Figures 15, 16, and 21, a first reset member connecting portion 4115 is provided on the first rotating plate 411, and a second reset member connecting portion 4215 is provided on the second rotating plate 421. This structure facilitates the connection of the reset member. As shown in Figures 15, 16, and 21, a first reset member positioning portion 4116 is also provided on the first rotating plate, and a second reset member positioning portion 4216 is provided on the second rotating plate. This structure serves to position the reset member, ensuring its proper operation.In this embodiment, the first return member positioning portion 4116 is a first positioning rib, and the second return member positioning portion 4216 is a second positioning rib. As shown in Figure 16, a second clearance notch 4221 extending vertically through the middle of the end of the second hook 422 is provided. The second clearance notch 4221 also serves to clear the rotating member 51, making the overall structure more compact. As shown in Figures 15 and 16, the first rotating plate 411 has a first limiting surface 413 located below the first hook 412, and the second rotating plate 421 has a second limiting surface 423 located below the second hook 422. The first limiting surface 413 and the second limiting surface 423 are arranged flush. When the first buckle 41 and the second latch 42 are in a stationary state, the first limiting surface 413 of the first buckle 41 abuts the vertical plate 212, and the second limiting surface 423 of the second latch 42 abuts the vertical plate 212. The first limiting surface 413 and the second limiting surface 423 respectively define the positions of the first latch 41 and the second latch 42, ensuring that both latch into place with the latching plane 21b. As shown in Figure 1, the cooking appliance further includes a first return member 44 disposed between the pot body 10 and the first latch 41, and a second return member 45 disposed between the pot body 10 and the second latch 42. The first return member 44 maintains the first latch 41 in a vertical position, while the second return member 45 maintains the second latch 42 in a vertical position. When the lid assembly 20 is in the closed position, the first latch 41 presses against the rotating member 51 under the elastic force of the first return member 44, while the second latch 42 latches onto the latching platform 21a under the elastic force of the second return member 45. Both the first return member 44 and the second return member 45 are torsion springs. The first stopper surface 413 of the first latch 41 is designed to abut against the vertical plate 212 of the platform 21a or a vertical plate on the pot body 10 located below the vertical plate 212, thereby maintaining the first latch 41 in a vertical position. Similarly, the second stopper surface 423 of the second latch 42 is designed to abut against the vertical plate 212 of the platform 21a or a vertical plate on the pot body 10 located below the vertical plate 212, thereby maintaining the second latch 42 in a vertical position. When the first rotating plate 411 and the second rotating plate 421 are in contact, the first stopper surface 413 and the second stopper surface 423 are coplanar.As shown in Figures 1, 9, and 10, the pot body 10 includes an inner pot 11 having a pot opening flange 111. The linkage member 52 includes a slide plate with a slide groove 521. The locking mechanism 30 includes a mounting plate 31 and a clamp 32 disposed at the bottom of the mounting plate 31, capable of locking or unlocking the pot opening flange 111. The slide plate moves perpendicular to the direction of movement of the mounting plate 31. The mounting plate 31 is provided with a limiting post 311 extending through the slide groove 521. The angle a between the slide groove 521 and the direction of movement of the mounting plate 31 is greater than or equal to 25° and less than 45°. The slide plate moves along the front-to-back direction of the cover assembly 20, while the mounting plate 31 moves along the left-to-right direction of the cover assembly 20. The smaller the angle a, the smaller the distance the slide plate moves for the same distance of movement of the mounting plate 31. This makes the cooking appliance more compact. However, when the angle a is greater than or equal to 25°, the limiting post 311 slides more smoothly within the chute 521. Preferably, the angle a can be 25°, 30°, 35°, or 40°, among others. To account for manufacturing errors and ensure some relative movement between the slide and limiting post 311 after the locking mechanism 30 is locked in place, in the first embodiment, as shown in Figures 9 and 10 , the slide is further provided with an extension slot 522 connected to the chute 521. The extension slot 522 is located at the end of the chute 521 away from the rotating member 51, and the extension direction of the extension slot 522 is parallel to the movement direction of the slide. Due to manufacturing errors, the slide may not move into position after the locking mechanism 30 is locked in place. If the extension slot 522 is not provided, the slide will continue to pull on the limiting post 311, causing the locking mechanism 30 to collide with the pot mouth flange 111, resulting in damage to the pot mouth flange 111. The arrangement with the extension slot 522 allows for a certain amount of relative movement between the slide plate and the limiting post 311 after the locking mechanism 30 is locked in place, thereby preventing collision between the locking mechanism 30 and the pot opening flange 111. As shown in Figures 3a to 4e, when the locking mechanism 40 is in the released state (Figures 4a to 4e), a first distance L3 (Figure 4e) exists between the clamp 32 and the pot opening flange 111. When the locking mechanism 40 is in the single-engaged state (Figures 3a to 3e), a second distance L4 (Figure 3e) exists between the clamp 32 and the pot opening flange 111. This second distance L4 is less than the first distance L3.This structure ensures that before the latch mechanism 40 engages the latching platform 21a, there is always a distance between the clamp 32 and the pot opening flange 111. This prevents the lid assembly 20 from moving upward relative to the pot body 10, causing the clamp 32 to interfere with the pot opening flange 111 and preventing the lid from closing. As shown in Figures 1 and 9 to 11, the slide plate is further provided with a panel 523 surrounding the outer periphery of the chute 521. The limiting post 311 is provided with a rotatable friction-reducing member 312, which is located within the panel 523 and engages with the inner wall of the panel 523. This structure reduces friction when the limiting post 311 moves within the chute 521, thereby ensuring smoother movement. Preferably, the friction-reducing member 312 is a ball bearing. This structure is simple and low-cost. In the first embodiment, the locking mechanism 30 has a floating position and a descending position. The friction reducing member 312 engages with the enclosure 523 in both the floating and descending positions. This ensures that friction on the limiting post 311 during sliding is reduced, regardless of whether pressure is applied within the inner pot 11. As shown in Figure 12, a receiving slot 511 is provided at the top of the rotating member 51, and a linkage shaft 524 is provided at the front end of the linkage member 52. The linkage shaft 524 is located within the receiving slot 511. The latch mechanism 40 drives the bottom end of the rotating member 51. This structure is easy to manufacture, and the rotating member 51 pulls the linkage member 52 more smoothly. The rotating member 51 is provided with a shaft, and the lining cover 21 is provided with a shaft hole for receiving the shaft. As shown in Figures 1, 11, and 17, the lid assembly 20 includes a lining cover 21 and a metal fixing plate 22 disposed below the lining cover 21. The locking mechanism 30 includes a mounting plate 31 and a clamp 32 disposed at the bottom of the mounting plate 31. The mounting plate 31 is movably mounted on the metal fixing plate 22. The metal fixing plate 22 is floatingly mounted below the lining cover 21 via a connector 24. A positioning structure is provided between the center of the metal fixing plate 22 and the center of the lining cover 21. The metal fixing plate 22 is floatingly mounted below the lining cover 21 via the connector 24, creating a vertical gap between the clamp 32 and the pot opening flange 111. When the inner pot 11 is hot and contains a large amount of steam, closing the lid causes the lid assembly 20 to move upward, driving the clamp 32 upward. A vertical gap is created between the clamp 32 and the pot opening flange 111, preventing the clamp 32 from pressing against the inner pot 11 and preventing the lid from closing. The lining cover 21 is provided with a connection hole for receiving the connector 24. The connector 24 is mounted on the lining cover 21 in a floating manner via a spring and a gasket. To minimize the impact of deformation of the lining cover 21 on the movement of the mounting plate 31, the clearance between the connector 24 and the connection hole should be greater than 0.1 mm and less than or equal to 2 mm, preferably 0.5 mm. The bracket of the metal fixing plate 22 is provided with a first guide groove extending in the left-right direction of the lining cover 21. The lining cover 21 is also provided with a second guide groove extending in the left-right direction of the lining cover 21. The limiting post 311 is sequentially inserted through the first guide groove, the second guide groove, and the slide groove 521 from bottom to top. In the first embodiment, a surface cover 25 is further provided above the lining cover 21. As shown in Figures 1, 11, and 17, the cover assembly 20 further includes an inner cover 23 disposed below the metal fixing plate 22. A temperature sensor 231 is provided at the center of the inner cover 23 and is connected to the lining cover 21. The metal fixing plate 22 is provided with a through hole 221 through which the temperature sensor 231 is inserted. The positioning structure includes a positioning hole 214 and a positioning post 222 disposed within the positioning hole 214. The positioning hole 214 is provided on the lining cover 21, and the positioning post 222 is provided on the metal fixing plate 22. In the above structure, the cooperation between the temperature sensor 231 and the through hole 221 limits the radial movement of the metal fixing plate 22 relative to the lining cover 21. The cooperation between the positioning hole 214 and the positioning post 222 prevents the metal fixing plate 22 from rotating relative to the lining cover 21. Of course, as a feasible embodiment, a separate positioning post can be omitted, and the temperature sensor 231 can be used to perform the corresponding function of the positioning post. In other words, the positioning function can be achieved solely by the temperature sensor 231. When the temperature sensor 231 is located at the center of the inner cover 23, the temperature sensor 231 and the through hole 221 need to be locked in place. When the temperature sensor 231 is offset from the center of the inner cover 23, the temperature sensor 231 and the through hole 221 do not need to be locked in place. As shown in FIG6 , to facilitate installation of the third return member 53, the cover assembly 20 includes a lining cover 21, a first hook 525 provided on the slide, and a second hook 213 provided on the lining cover 21. The transmission mechanism 50 also includes a third return member 53 installed between the first hook 525 and the second hook 213. The third return member 53 is a tension spring that applies an elastic force to the slide, causing it to move backward, unlocking the locking mechanism 30.In Example 1, to simplify the structure and reduce costs, the lid assembly 20 includes a lining cover 21 and an inner cover 23 disposed below the lining cover 21. The inner cover 23 is provided with a floating stopper rod, and the linkage member 52 is provided with a stopper hole that engages with the stopper rod. In Example 1, the linkage member 52 is provided with a position detection member (not shown) for detecting the position of the linkage member 52 and, therefore, whether the locking mechanism 30 is locked or unlocked, thereby facilitating subsequent cooking process control. Alternatively, as a feasible embodiment, the latch mechanism 40 is provided with a position detection member (not shown) for detecting the position of the linkage member 52 and, therefore, whether the locking mechanism 30 is locked or unlocked, thereby facilitating subsequent cooking process control. As shown in Figures 7 and 8, the lid assembly 20 includes a lining cover 21 with a retaining plate 21a disposed thereon. The retaining plate 21a comprises a transverse plate 211 and a vertical plate 212 connected thereto. A snap mechanism 40 engages with the top surface of the vertical plate 212. The rotating member 51 is located above the transverse plate 211 and behind the vertical plate 212. A first notch 2121 is provided in the middle of the top surface of the vertical plate 212 to provide clearance for the rotating member 51. This structure allows the retaining plate 21a to clear the rotating member 51 to a certain extent via the first notch 2121, making the cooking appliance more compact. The following describes the closing and opening processes of the cooking appliance according to Example 1.The lid closing process of the cooking appliance in the first embodiment is as follows: First stage: As shown in FIGS. 4a to 4e, the inclined surface of the lower surface of the clamping table portion 21a causes the first snap 41 to move, and at the same time drives the second snap 42 to move. At this time, the caliper 32 is in a fully open state, the limit post 311 is in the initial position, and the first distance between the caliper 32 and the flanging 111 of the pot mouth is L3 (designed clearance); Second stage: As shown in FIGS. 3a to 3e, when the lid assembly 20 reaches the set position, the second snap 42 is reset under the action of the second reset member 45 and is snapped onto the fastening plane 21b of the clamping table portion 21a, so that the pot body 10 and the lid assembly 20 are fastened together, ensuring that the lid assembly will not bounce or shake. At this time, the first snap 41 does not touch the rotating member 51, the slide plate does not move, the caliper 32 is in a fully open state, and the limit post 311 is in the initial position; Further, the first snap 41 is snapped onto the fastening plane 21b of the clamping table portion 21a, the first snap 41 touches the rotating member 51, and at the same time drives the slide plate to move, forcing the caliper 32 to move, and the limit post 311 moves to the second position; When the limit post 311 moves from the initial position to the second position, there is still a distance between the caliper 32 and the flanging of the pot mouth 111 to avoid contact between the caliper 32 and the flanging of the pot mouth 111, and the second distance between the two is L4, L4 < L3. Third stage: As shown in FIGS. 2a to 2d, the first snap 41 contacts the bottom end of the rotating member 51 and drives it to rotate, forcing the slide plate to slide, so that the caliper 32 clamps the flanging 111 of the pot mouth, and the limit post 311 is in the third position; The force F of the first reset member 44 > the force f of the third reset member 53. The lid opening process of the cooking appliance in the first embodiment is as follows: First stage: As shown in FIGS. 2a to 2d, the limit post 311 is in the third position, and the caliper 32 is located below the flanging 111 of the pot mouth; Second stage: As shown in FIGS. 3a to 3e, push the unlocking operation portion 6ο, drive the first snap 41 to move, and at the same time the third reset member 53 pulls the slide plate to drive the caliper 32 to move. When the limit post 311 moves to the second position, the second snap 42 contacts the first snap 41, and the second snap 42 is still snapped onto the fastening plane 21b. At this time, the caliper 32 is completely disengaged from the flanging 111 of the pot mouth; Third stage: As shown in FIGS. 4a to 4e, the first snap 41 drives the second snap 42 to move, so that the second snap 42 disengages from the fastening plane 21b, and the lid assembly 20 is opened to complete the lid opening. As shown in FIGS. 18 and 19, the difference between the cooking appliance in the second embodiment and the first embodiment is only in the driving manner for the unlocking operation portion to achieve unlocking.Specifically, in the second embodiment, an unlocking operation portion 60 is movably disposed on the pot body 10′. The unlocking operation portion 60 engages with the rotating member 51 via a push structure 70. In the second embodiment, the unlocking operation portion 60 does not engage with the latch mechanism 40 but rather with the rotating member 51. When the lid assembly 20 needs to be opened, the user presses the unlocking operation portion 60, which drives the rotating member 51 to rotate, thereby unlocking the locking mechanism 30. Simultaneously, the rotation of the rotating member 51 causes the latch mechanism 40 to switch from a double-engaged state to a single-engaged state, and then to a released state. During this process, the locking mechanism 30 is first unlocked, followed by the latch mechanism 40 being separated from the latching platform 21a, ultimately opening the lid assembly 20. Preferably, the unlocking operation portion 60 is a lid-opening button, disposed on the pot body 10 via a fixing ring 61. The unlocking operation portion 60 pushes against the bottom end of the push structure 70. The push structure 70 comprises multiple components. In the second embodiment, the push structure 70 includes a first push member 71, a second push member 72, and a third push member 73. The first push member 71 moves horizontally when pushed by the unlocking operation portion 60. The second push member 72 is mounted on the pot body and can move vertically when the first push member 71 moves horizontally. The third push member 73 is mounted on the lid assembly 20 and can move upward when the second push member 72 moves upward. Ultimately, the upward movement of the third push member 73 drives the rotational member 51 to rotate. As shown in Figures 12 and 15, the latch mechanism 40 is provided with a first clearance portion 43 that avoids the push structure 70. The rotational member 51 is provided with a push slope 512 that cooperates with the push structure 70 and a second clearance portion 513 that avoids the push structure 70. This structure makes the overall layout of the cooking appliance more rational and the structure more compact. As shown in Figures 12 and 15 , the first relief portion 43 is a second notch, and the second relief portion 513 is a recess provided on the front surface of the rotating member 51. The bottom of the push-up inclined surface 512 extends into the recess. This structure is simple and easy to implement. Extending the bottom of the push-up inclined surface 512 into the recess allows the size of the rotating member 51 to be reduced while ensuring the proper fit between the push-up structure 70 and the push-up inclined surface 512. This, in turn, makes the overall structure of the cooking appliance more compact.The lid closing process of the cooking appliance in this embodiment is as follows: The first stage: As shown in FIGS. 27a to 27d, the inclined surface of the lower surface of the clamping table portion 21a causes the first buckle 41 to move, and at the same time带动 the second buckle 42 to move. At this time, the caliper 32 is in a fully open state, the limit post 311 is in the initial position, and the first distance between the caliper 32 and the flanging 111 of the pot mouth is the designed gap L3; The second stage: As shown in FIGS. 26a to 26d, when the lid assembly 20 reaches the set position, the second buckle 42 is reset and buckled on the buckling plane 21b of the clamping table portion 21a under the action of the third reset member 45, so that the pot body 10 and the lid assembly 20 are buckled together to ensure that the lid assembly will not bounce or shake. At this time, the first buckle 41 does not touch the rotating member 51, the slide plate does not move, the caliper 32 is in a fully open state, and the limit post 311 is in the initial position; Further, the first buckle 41 is buckled on the buckling plane 21b of the clamping table portion 21a, the first buckle 41 touches the rotating member 51, and at the same time带动 the slide plate to move, forcing the caliper 32 to move, and the limit post 311 moves to the second position; When the limit post 311 moves from the initial position to the second position, there is still a distance between the caliper 32 and the flanging 111 of the pot mouth to avoid contact between the caliper 32 and the flanging 111 of the pot mouth. The second distance between the two is L4, and L4 < L3. The third stage: As shown in FIGS. 25a to 25d, the first buckle 41 contacts the bottom end of the rotating member 51 and带动 it to rotate, forcing the slide plate to slide, so that the caliper 32 catches the flanging 111 of the pot mouth, and the limit post 311 is in the third position; The force F of the second reset member 44 > the force f of the fourth reset member 53. The lid opening process of the cooking appliance in this embodiment is as follows: The first stage: As shown in FIGS. 25a to 25d, the limit post 311 is in the third position, and the caliper 32 is located below the flanging 111 of the pot mouth; The second stage: As shown in FIGS. 26a to 26d, push the unlocking operation portion 60, push the first pushing member 71 to move inward, the first pushing member 71 drives the second pushing member 72 to move upward through the driving inclined surface, and then带动 the third pushing member 73 to move upward, thereby带动 the rotating member 51 to rotate,带动 the slide plate to move,带动 the caliper 32 to move. When the limit post 311 moves to the second position, the first buckle 41 contacts the second buckle 42, and the second buckle 42 is still buckled on the buckling plane 21b. At this time, the caliper 32 is completely disengaged from the flanging 111 of the pot mouth; The third stage: As shown in FIGS. 27a to 27d, the first buckle 41带动 the second buckle 42 to move, so that the second buckle 42 disengages from the buckling plane 21b, and the lid assembly 20 is opened to complete the lid opening.In an embodiment not shown in the figures, the cooking appliance further includes an unlocking operation portion movably disposed on the lid assembly and drivingly engaged with the rotating member. The above structure can also achieve unlocking and locking of the lid assembly 20, and will not be described in detail here. The cooking appliance of the present application is a pressure cooker, but it can also be an electric rice cooker, electric stew pot, stir-fry machine, food processor, or other appliance with other functions. In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional terms such as "front, back, up, down, left, right," "lateral, vertical, perpendicular, horizontal," and "top, bottom," etc., are generally based on the directions or positional relationships shown in the accompanying drawings. These directions are used solely to facilitate the description of the present invention and simplify the description. Unless otherwise indicated, these directional terms do not indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present invention. The directional terms "inside" and "outside" refer to the inside and outside relative to the outline of the component itself. For ease of description, spatially relative terms such as "above," "above," "on the upper surface of," and "upper" may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to encompass different orientations of the device during use or operation in addition to the orientation depicted in the figures. For example, if a device in a drawing is inverted, a device described as "above" or "above" another device or structure would subsequently be positioned as "below" or "beneath" the other device or structure. Thus, the exemplary term "above" may include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative terms used herein should be interpreted accordingly. In addition, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meanings and should not be construed as limiting the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Persons skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

Claims 1. A cooking appliance, characterized in that, Comprising: A pot body (10); a lid assembly (20) which is disposed on the pot body (10) in an openable and closable manner. The rear part of the lid assembly (20) is pivotally connected to the pot body (10). A clamping table portion (21a) is provided at the front part of the lid assembly (20). The lid assembly (20) has an open state and a closed state; a locking mechanism (30) which is movably disposed on the lid assembly (20) and has a locking state for locking the pot body (10) and an unlocking state for unlocking the pot body (10); a buckle mechanism (40) which is rotatably disposed on the pot body (10). The buckle mechanism (40) has a double clamping state and an unclamping state for cooperating with the clamping table portion (21a); a transmission mechanism (50) which includes a rotating member (51) rotatably disposed on the lid assembly (20) and a linkage member (52) disposed between the rotating member (51) and the locking mechanism (30); an unlocking operation portion (60) which is movably disposed on the pot body (10). The unlocking operation portion (60) is in driving cooperation with either the buckle mechanism (40) or the rotating member (51); when the buckle mechanism (40) is in the double clamping state, the buckle mechanism (40) is clamped with the clamping table portion (21a), and the buckle mechanism (40) abuts against the rotating member (51) and pulls the linkage member (52) to keep the locking mechanism (30) in the locking state. When the buckle mechanism (40) drives the rotating member (51) to rotate or is driven by the rotating member (51) to rotate, the part of the buckle mechanism (40) connected to the clamping table portion (21a) can remain relatively stationary, and the buckle mechanism (40) continues to rotate and then switches to the unclamping state.

2. The cooking appliance according to claim 1, characterized in that The buckle mechanism (40) comprises a first buckle (41) and a second buckle (42), and the first buckle (41) and the second buckle (42) are both rotatably arranged on the pot body (10), wherein when the buckle mechanism (40) is in the double-clamping state, the second buckle (42) is clamped with the clamping platform (21a), the first buckle (41) abuts against the rotating member (51) and pulls the linkage member (52) to keep the locking mechanism (30) in the locked state, and when the buckle mechanism (40) is in the unlocking state, the second buckle (42) is separated from the clamping platform (21a), the first buckle (41) releases the rotating member (51) and the locking mechanism (30) is kept in the unlocking state.

3. The cooking appliance according to claim 2, characterized in that, The first buckle (41) comprises a first rotating plate (411) and a first hook (412) arranged at the end of the first rotating plate (411). The second buckle (42) comprises a second rotating plate (421) and a second hook (422) arranged at the end of the second rotating plate (421), and an escape space (46) is provided between the first hook (412) and the second hook (422), so that when the first buckle (41) rotates relative to the second buckle (42), the second hook (422) escapes the first hook (412).

4. The cooking appliance according to claim 3, wherein The first hook body (412) has a first protruding dimension L1 protruding from the first rotating plate (411), and the second hook body (422) has a second protruding dimension L2 protruding from the second rotating plate (421), wherein the first protruding dimension L1 and the second protruding dimension L2 satisfy LI N 1.5L2.

5. The cooking appliance according to any one of claims 2 to 4, characterized in that The cooking utensil further comprises a first restoring member (44) arranged between the pot body (10) and the first buckle (41), and a second restoring member (45) arranged between the pot body (10) and the second buckle (42).

6. The cooking appliance according to any one of claims 1 to 5, characterized in that The pot body (10) includes an inner pot (11). The inner pot (11) has a flanged edge (111) at the pot opening. The linkage member (52) includes a slide plate, and a chute (521) is provided on the slide plate. The locking mechanism (30) includes a mounting plate (31) and a caliper (32) provided on the mounting plate (31). The caliper (32) can lock or unlock the flanged edge (111) at the pot opening. The moving direction of the slide plate is perpendicular to the moving direction of the mounting plate (31). A limit post (311) passing through the chute (521) is provided on the mounting plate (31). The included angle a between the chute (521) and the moving direction of the mounting plate (31) is greater than or equal to 25° and less than 45°.

7. The cooking appliance according to claim 6, characterized in that An extension groove (522) communicating with the chute (521) is further provided on the slide plate. The extension groove (522) is provided at one end of the chute (521) away from the rotating member (51). The extending direction of the extension groove (522) is parallel to the moving direction of the slide plate.

8. The cooking appliance according to any one of claims 1 to 7, characterized in that, The buckle mechanism (40) further has a single clamping state. When the buckle mechanism (40) is in the single clamping state, the buckle mechanism (40) is clamped with the clamping platform portion (21a). The buckle mechanism (40) releases the rotating member (51), and the locking mechanism (30) switches from the locked state to the unlocked state and remains in the unlocked state.

9. The cooking appliance according to claim 8, wherein When the buckle mechanism (40) is in the unclamping state, there is a first distance between the caliper (32) and the flanged edge (111) at the pot opening. When the buckle mechanism (40) is in the single clamping state, there is a second distance between the caliper (32) and the flanged edge (111) at the pot opening. The second distance is less than the first distance.

10. The cooking appliance according to any one of claims 6 to 9, characterized in that A surrounding plate (523) surrounding the outer periphery of the chute (521) is further provided on the slide plate. A rotatable friction reducing member (312) is provided on the limit post (311). The friction reducing member (312) is located within the surrounding plate (523) and cooperates with the inner wall of the surrounding plate (523).

11. The cooking appliance according to claim 10, wherein The friction reducing member (312) is a ball bearing.

12. The cooking appliance according to claim 10 or 11, characterized in that, The locking mechanism (30) has a floating position and a descending position. When the locking mechanism (30) is in the floating position and the descending position, the friction reducing member (312) cooperates with the surrounding plate (523).

13. The cooking appliance according to any one of claims 1 to 12, characterized in that, A receiving groove (511) is provided at the top end of the rotating member (51). A linkage shaft (524) is provided at the front end of the linkage member (52). The linkage shaft (524) is located within the receiving groove (511). The buckle mechanism (40) cooperates with the lower end of the rotating member (51).

14. The cooking appliance according to any one of claims 1 to 13, characterized in that, The cover assembly (20) includes a lining cover (21) and a metal fixing plate (22) disposed below the lining cover (21), and the locking mechanism (30) includes a mounting plate (31) and a caliper (32) disposed on the mounting plate (31), and the mounting plate (31) is movably disposed on the metal fixing plate (22), and the metal fixing plate (22) is floatingly mounted below the lining cover (21) through a connector (24), and a positioning structure is disposed between the middle of the metal fixing plate (22) and the middle of the lining cover (21).

15. The cooking appliance according to claim 14, characterized in that, The positioning structure includes a positioning hole (214) and a positioning post (222) disposed in the positioning hole (214), and one of the positioning hole (214) and the positioning post (222) is disposed on the lining cover (21), and the other is disposed on the metal fixing plate (22), wherein the positioning post (222) is located at the center of the lining cover (21) or the center of the metal fixing plate (22), the positioning post (222) and the positioning hole (214) are in anti-rotation fit, or the positioning post (222) deviates from the center of the lining cover (21) or the center of the metal fixing plate (22).

16. The cooking appliance according to claim 6, wherein, The cover assembly (20) includes a lining cover (21), a first hook (525) is disposed on the slide plate, a second hook (213) is disposed on the lining cover (21), and the transmission mechanism (50) further includes a third reset member (53) mounted between the first hook (525) and the second hook (213).

17. The cooking appliance according to any one of claims 1 to 16, characterized in that, The cover assembly (20) includes a lining cover (21) and an inner cover (23) disposed below the lining cover (21), a non-opening lever that can float up and down is disposed on the inner cover (23), and a limiting hole that cooperates with the non-opening lever is disposed on the linkage member (52).

18. The cooking appliance according to any one of claims 1 to 17, characterized in that, A position detection member is disposed on the linkage member (52); or a position detection member is disposed on the buckle mechanism (40).

19. The cooking appliance according to any one of claims 1 to 18, characterized in that, The cover assembly (20) includes a lining cover (21), a clamping table portion (21a) is disposed on the lining cover (21), the clamping table portion (21a) includes a transverse plate (211) and a vertical plate (212) connected to the transverse plate (211), and the buckle mechanism (40) is in clamping fit with the top surface of the vertical plate (212), the rotating member (51) is located above the transverse plate (211) and behind the vertical plate (212), and a first notch (2121) for avoiding the rotating member (51) is disposed in the middle of the top surface of the vertical plate (212).

20. The cooking appliance according to any one of claims 1 to 19, characterized in that It further includes a pushing structure (70), and the unlocking operation part (60) is in driving cooperation with the rotating part (51) through the pushing structure (70); wherein, when the cover body assembly (20) is switched from the closed state to the open state, the unlocking operation part (60) causes the pushing structure (70) to drive the rotating part (51) to rotate, the rotating part (51) drives the locking mechanism (30) to be switched from the locked state to the unlocked state and remain in the unlocked state, and the rotating part (51) drives the buckle mechanism (40) to separate from the clamping table part (21a).

21. The cooking appliance according to claim 20, wherein The pushing structure (70) includes a second pushing member (72) which is liftably arranged on the pot body (10) and a third pushing member (73) which is liftably arranged in the cover body assembly (20). The unlocking operation part (60) is in driving cooperation with the bottom end of the second pushing member (72), the top end of the second pushing member (72) is in cooperation with the bottom end of the second pushing member (73), and the top end of the third pushing member (73) is in cooperation with the rotating part (51).

22. The cooking appliance according to claim 21, wherein, The unlocking operation part (60) includes a button. The pushing structure (70) further includes a first pushing member (71). The unlocking operation part (60) drives the first pushing member (71) to move in the horizontal direction, and the top end of the first pushing member (71) is in cooperation with the bottom end of the second pushing member (72) through a driving inclined surface.

23. The cooking appliance according to claim 21 or 22, characterized in that The pushing structure (70) further includes a fourth reset member arranged between the cover body assembly (20) and the third pushing member (73). The fourth reset member applies an elastic force to the third pushing member (73) to keep the third pushing member (73) in the lowered position.

24. The cooking appliance according to claim 23, characterized in that, The cover body assembly (20) has a mounting table (26). Mounting holes are provided on the mounting table (26). The third pushing member (73) includes a push rod (731) and a limiting plate (732) arranged on the push rod (731). The push rod (731) is inserted into the mounting holes. An installation frame (27) is arranged above the mounting table (26). The limiting plate (732) is located between the mounting table (26) and the installation frame (27), and the fourth reset member is arranged between the installation frame (27) and the limiting plate (732).

25. The cooking appliance according to any one of claims 21 to 24, characterized in that, The rotating part (51) is provided with a pushing inclined surface for cooperating with the pushing structure (70) and a first avoiding part for avoiding the pushing structure (70).

26. The cooking appliance according to claim 25, wherein, The first avoiding part is a notch arranged on the front surface of the rotating part (51).

27. The cooking appliance according to any one of claims 20 to 26, characterized in that, A second avoidance portion (43) for avoiding the pushing structure (70) is provided on the buckle mechanism (40).

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