Cover assembly and cooking utensil

Abstract

The present invention discloses a cover assembly, including an upper cover, provided with a pressure relief structure, a drive structure, and a lever structure. The lever structure includes a labor-intensive end and a labor-saving end. The drive structure drives the labor-saving end to rotate, so that the labor-intensive end drives the pressure relief structure to exhaust air. Also disclosed is a cooking utensil. The cover assembly and cooking utensil provided by the present invention reduce the driving force of the lever structure by providing the labor-saving end and the labor-intensive end of the lever structure, thereby saving production costs. The lever structure includes a push rod and an exhaust rod for linkage control, resulting in a simple structure, an optimized exhaust structure, and a reduced space occupied by the exhaust structure.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking utensils, and in particular to a cover assembly and a cooking utensil. Background Art

[0002] Most cooking appliances on the market today feature an exhaust mechanism, typically located on the appliance's lid assembly. Generally, these mechanisms include manual and automatic exhaust, each suited to different usage scenarios. Users can simultaneously exhaust the air by turning the handle to open the lid, or they can activate the electromagnet for continuous exhaust by pressing a button on the appliance's control panel.

[0003] However, the exhaust structure in the prior art is usually configured with a connecting rod to drive the pressure relief valve assembly. Although this structure saves a connecting rod, the force required to drive the connecting rod is relatively large. Whether it is automatic exhaust or manual exhaust, a large thrust needs to be applied to the connecting rod. For the electromagnet of the automatic exhaust structure, the driving force of the electromagnet needs to be relatively high, which increases the production cost.

[0004] Therefore, there is an urgent need to design a cover assembly and an exhaust structure for a cooking utensil to solve the problem that the exhaust structure provides a large driving force and a high cost. Summary of the Invention

[0005] The purpose of the present invention is to provide a cover assembly and a cooking utensil that reduce the driving force of the exhaust structure and save production costs. The specific technical solution is as follows:

[0006] The present invention provides a cover assembly, including an upper cover, on which a pressure relief structure, a driving structure and a lever structure are provided. The lever structure includes a labor-intensive end and a labor-saving end. The driving structure drives the labor-saving end to rotate so that the labor-intensive end drives the pressure relief structure to exhaust.

[0007] As a preferred embodiment of the present invention, the driving structure includes an electromagnet, and the electromagnet is in contact with the labor-saving end so that the electromagnet drives the labor-saving end to rotate.

[0008] As a preferred embodiment of the present invention, the lever structure includes a push rod and an exhaust rod. The push rod and the exhaust rod are in contact with each other. The push rod is driven to rotate the exhaust rod, thereby realizing that the exhaust rod drives the pressure relief structure to exhaust.

[0009] As a preferred embodiment of the present invention, the rotation plane where the push rod is located and the rotation plane where the exhaust rod is located are arranged perpendicular to each other.

[0010] As a preferred embodiment of the present invention, a through hole is provided on the push rod, and the through hole is rotatably connected to a protruding column provided on the upper cover, so that the push rod can rotate on the upper cover.

[0011] As a preferred embodiment of the present invention, a limiting block is provided on the upper cover, and a groove is provided on the push rod. The groove and the limiting block are clearance-matched to limit the rotation range of the push rod.

[0012] As a preferred embodiment of the present invention, a protrusion is provided on the push rod, the protrusion is in contact with the exhaust rod, and the driving structure drives the protrusion to rotate so that the protrusion and the exhaust rod abut against each other, thereby driving the rotation of the exhaust rod.

[0013] As a preferred embodiment of the present invention, the force arm distance between the protrusion and the through hole is set to L1, a notch is provided on the push rod, the driving structure is in contact with the notch, and the force arm distance between the notch and the through hole is set to L2, L1 is smaller than L2, so that the force generated by the protrusion is greater than the force received by the notch, and the end of the push rod where the notch is located is the force-saving end.

[0014] As a preferred embodiment of the present invention, the ratio of the arm distance L1 between the protrusion and the through hole to the arm distance L2 between the notch and the through hole is 0.2-0.3.

[0015] As a preferred embodiment of the present invention, the exhaust rod includes a connecting column and a connecting rod, the connecting column and the connecting rod are fixedly connected, and the connecting column and the push rod are in contact so that the push rod pushes the connecting column to rotate, thereby driving the rotation of the connecting rod.

[0016] As a preferred embodiment of the present invention, a limiting groove is provided on the limiting block, and the connecting column rotates in the limiting groove to limit the rotation range of the exhaust rod.

[0017] As a preferred embodiment of the present invention, a baffle is provided on the connecting column, and the protrusion abuts against the baffle provided on the connecting column, so that the push rod drives the exhaust rod to rotate.

[0018] As a preferred embodiment of the present invention, a platform is provided on the exhaust rod, the connecting rod is connected to the platform, the pressure relief structure includes a pressure relief push rod and a pressure relief valve assembly, and the connecting rod rotates so that the platform drives the pressure relief push rod to lift the pressure relief valve assembly, thereby realizing pressure relief and exhaust.

[0019] As a preferred embodiment of the present invention, a center line is set in the length direction of the connecting column, and the center line is the rotation center of the exhaust rod. The distance between the point where the protrusion acts on the baffle and the center line is set to L3, and the distance between the platform and the center line is set to L4. L4 is greater than L3, so that the force applied to the platform is less than the abutment force of the protrusion on the baffle.

[0020] As a preferred embodiment of the present invention, the ratio of the distance L4 between the platform and the center line to the distance L3 between the point of action of the projection on the baffle and the center line is 7-8.

[0021] The present invention also provides a cooking utensil comprising the cover assembly as described above.

[0022] The cover assembly and cooking utensil of the present invention have the following advantages:

[0023] The cover assembly and cooking utensil provided by the present invention reduce the driving force of the lever structure by setting the labor-saving end and the labor-consuming end of the lever structure, thereby saving production costs. The lever structure includes a push rod and an exhaust rod for linkage control, has a simple structure, optimizes the exhaust structure, and reduces the space occupied by the exhaust structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The structure of the cover assembly of the present invention is schematically shown Figure 1 ;

[0025] Figure 2 The structure diagram of the automatic exhaust of the cover assembly of the present invention is shown as follows Figure 1 ;

[0026] Figure 3 The structure diagram of the automatic exhaust of the cover assembly of the present invention is shown as follows Figure 2 ;

[0027] Figure 4 The structure diagram of the manual exhaust of the cover assembly of the present invention is shown as follows Figure 1 ;

[0028] Figure 5 The structure diagram of the manual exhaust of the cover assembly of the present invention is shown as follows Figure 2 ;

[0029] Figure 6 A sectional view of the manual exhaust of the cover assembly of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the push rod of the cover assembly of the present invention;

[0031] Figure 8 It is a structural schematic diagram of the connecting rod of the cover assembly of the present invention;

[0032] Figure 9 This is a schematic diagram of the exploded structure of the handle assembly of the cover assembly of the present invention;

[0033] Figure 10 It is a structural schematic diagram of the rotating part of the cover assembly of the present invention;

[0034] Figure 11 This is a schematic diagram of the overall structure of the handle assembly of the cover assembly of the present invention;

[0035] Figure 12 It is a schematic diagram of the overall structure of the crank of the cover assembly of the present invention;

[0036] Figure 13 It is a schematic diagram of the overall structure of the pressure relief valve assembly of the cover assembly of the present invention;

[0037] Figure 14 It is a schematic diagram of the overall structure of the pressure relief ejector rod of the cover assembly of the present invention.

[0038] Description of the marks in the figure:

[0039] 1. Upper cover; 2. Pressure relief valve assembly; 21. Valve body; 22. Exhaust pipe; 23. First gasket; 24. First sealing ring; 25. Gasket; 26. Nut; 27. Fixing part; 3. Push rod; 31. Through hole; 32. Groove; 33. Protrusion; 34. Reinforcement rib; 35. Notch; 4. Exhaust rod; 41. Connecting column; 411. Annular reinforcement rib; 42. Connecting rod; 421. Cantilever; 422. Platform; 43. Baffle; 5. Rotating part; 51. First boss; 52. Bump; 6. Electromagnet; 7. Pressure relief push rod; 71. Top; 72. Rod body; 73. Second sealing ring; 74. Second gasket; 8. Crank; 81. Second boss; 82. First slot; 83. Second slot; 9. Torsion spring. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0042] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] The present invention provides a cover assembly comprising an upper cover 1. The inner lining of the upper cover 1 is provided with an exhaust pipe connected to the housing of a cooking appliance. The exhaust pipe is provided with a pressure relief structure. When the cover assembly is performing high-pressure cooking, the pressure relief structure seals the exhaust pipe. After cooking is completed, the pressure relief structure is opened to allow the exhaust pipe to vent. Manual exhaust is achieved by the user rotating a handle, while automatic exhaust is achieved by the user controlling an electromagnet with a button. During the specific exhaust process, long-term use of automatic exhaust can cause the solenoid valve to operate continuously, and the high temperature can damage the solenoid valve.

[0044] like Figure 1 As shown, the present invention provides a cover assembly, including a pressure relief structure, a drive structure, a lever structure, and a drive structure. The pressure relief structure is arranged at the center of the upper cover 1. Of course, it is understandable that the pressure relief structure can also be arranged at any position of the upper cover 1. The present invention only defines the pressure relief structure, the drive structure, and the lever structure in a manner that saves the most space.

[0045] Furthermore, the lever structure can be driven manually or electrically, or by a combination of manual and electrical driving, so that the lever structure drives the pressure relief structure to exhaust. Manually driving the lever structure achieves manual exhaust of the cover assembly, electrically driving the lever structure achieves electrical exhaust of the cover assembly, and alternately driving the lever structure simultaneously allows the cover assembly to achieve both manual and electrical exhaust.

[0046] Specifically, the driving structure and the lever structure are in contact with each other. Manual exhaust is performed by driving the lever structure through the handle assembly. The handle assembly and the lever structure are in contact with each other. The lever structure is in contact with the pressure relief valve assembly 2. The driving structure drives the lever structure to rotate. The lever structure lifts the pressure relief structure to relieve pressure from the cover assembly. The handle assembly is manually driven to rotate. The handle assembly drives the lever structure to rotate. The lever structure lifts the pressure relief structure to relieve pressure from the cover assembly. By manually or automatically driving the cover assembly to relieve pressure, the cover assembly can be exhausted in one or more combined ways to shorten the pressure relief time.

[0047] The following is a detailed description of the different exhaust methods.

[0048] like Figure 6 and Figure 7 As shown, the lever structure provided by the present invention includes a push rod 3 and an exhaust rod 4. The push rod 3 and the exhaust rod 4 are in contact, so that the driving structure drives the push rod 3 to rotate, driving the exhaust rod 4 to rotate, thereby realizing exhaust of the pressure relief structure.

[0049] Furthermore, the push rod 3 is a plate-like structure, which is arranged in a stepped shape, including a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are connected, and a certain distance is set between the first connecting plate and the second connecting plate so that the first connecting plate is arranged above the second connecting plate. The above mentioned here is specifically the direction relatively close to the upper cover 1.

[0050] As a preferred embodiment, a certain distance is set between the plane where the first connecting plate is located and the plane where the second connecting plate is located. According to the specific structure and position setting relationship of the upper cover 1, the push rod 3 is set into two parts to form a stepped shape.

[0051] Specifically, a notch 35 is provided on the first connecting plate, so that the notch 35 and the driving structure abut against each other, thereby enabling the driving structure to drive the push rod 3 to rotate.

[0052] Furthermore, a reinforcing rib 34 is provided between the first connecting plate and the second connecting plate. The reinforcing rib 34 is used to increase the strength between the first connecting plate and the second connecting plate. The reinforcing rib 34 increases the stress strength of the notch 35 to avoid breakage.

[0053] Furthermore, a protrusion 33 is provided on the second connecting plate, and the protrusion 33 abuts against the exhaust rod 4 so that the driving structure drives the second connecting plate to rotate, thereby driving the protrusion 33 to drive the rotation of the exhaust rod 4 to realize the relative movement of the exhaust rod 4 and the pressure relief valve assembly.

[0054] Furthermore, a through hole 31 is provided on the second connecting plate, and a fixing post is provided on the upper cover 1. The through hole 31 and the fixing post are plugged and fixed to each other, so that the push rod 3 can rotate on the upper cover 1. Of course, it is understandable that in order to limit the rotation range of the push rod 3 on the upper cover 1, a groove 32 is provided on the side wall of the second connecting plate. The groove 32 is used to cooperate with a limit block provided on the upper cover 1, so that the groove 32 and the limit block are clearance-matched, thereby enabling the push rod 3 to rotate within the space formed by the upper cover 1.

[0055] like Figure 7 As shown, a limiting groove is provided on the limiting block, and the exhaust rod 4 is placed in the limiting groove so that the exhaust rod 4 rotates in the limiting groove, thereby limiting the rotation range of the exhaust rod.

[0056] Specifically, the exhaust rod 4 includes a connecting column 41, which is rotatably matched with the limiting groove so that the connecting column 41 rotates in the limiting groove. A baffle 43 is provided at one end of the connecting column 41, and the baffle 43 cooperates with the protrusion 33. The protrusion 33 drives the baffle 43 to rotate so that the connecting column 41 rotates in the limiting groove.

[0057] As a preferred embodiment, an annular reinforcing rib 411 is provided on the connecting column 41 to increase the strength of the exhaust rod 4. A T-shaped reinforcing rib is provided on one side of the baffle 43 to increase the strength between the baffle 43 and the connecting column 41, thereby improving the strength of the overall structure.

[0058] Furthermore, a connecting rod 42 is provided on the connecting column 41, and the connecting rod 42 and the connecting column 41 are arranged vertically. Of course, it can be understood that the connecting rod 42 and the connecting column 41 can also be set to other angles, as long as the rotation of the connecting column 41 can drive the rotation of the connecting rod 42.

[0059] As a preferred embodiment, a bending angle is set in the middle of the connecting rod 42 so that the first part of the connecting rod 42 is perpendicular to the connecting column 41, and the second part and the first part form an obtuse angle, thereby realizing a manually driven lever structure to enable the exhaust rod 4 to lift the valve body 2.

[0060] Furthermore, a platform 422 is provided on the connecting rod 42, and the platform 422 is connected to the pressure relief push rod 7, so that the exhaust rod 4 rotates, drives the pressure relief push rod 7 to abut against the valve body 2, and drives the valve body 2 to lift up, thereby realizing the exhaust of the cover assembly.

[0061] Furthermore, due to the space limitation of the upper cover 1, a lever structure in which the push rod 3 and the exhaust rod 4 cooperate to drive the pressure relief valve assembly to exhaust. If the electromagnet 6 directly drives the exhaust rod 4 to rotate, a higher initial force is required on the electromagnet 6. Therefore, the push rod 3 is set between the exhaust rod 4 and the electromagnet 6 to reduce the requirement for the initial force of the electromagnet 6.

[0062] Specifically, the lever arm distance between protrusion 33 and through-hole 31 is set to L1, and the lever arm distance between notch 35 and through-hole 31 is set to L2, with MIN(L1:L2) = 0.2 and MAX(L1:L2) = 0.3. Because lever arm L2 is greater than lever arm L1, the force generated by protrusion 33 is greater than the force exerted on notch 35, thus making push rod 3 a force-saving lever.

[0063] Furthermore, the centerline of the connecting column 41 is set as the rotation center. The centerline of the connecting column 41 is set along its length, and the perpendicular midline between the two ends of the connecting column 41 in the width direction is set as the centerline and is arranged parallel to the surface of the upper cover 1. The distance between the point of action of the protrusion 33 on the platform 422 and the centerline is L3, and the distance between the platform 422 and the centerline is L4, with MIN(L4:L3)=7 and MAX(L4:L3)=8. Because the lever arm L4 is greater than the lever arm L3, the force exerted on the platform 422 is less than the force generated by the platform 422. The exhaust rod 4 is a force-saving lever. The electromagnet 6 drives the movement of the force-saving lever, which in turn drives the movement of the pressure relief structure, thereby achieving pressure relief in the cover assembly. The use of a force-saving lever is primarily due to structural space limitations, and other components are designed in the intermediate area. If the electromagnet 6 acts directly on the force-saving lever, the initial force requirement for the electromagnet 6 is relatively high. Therefore, a force-saving lever is added between the two to reduce the initial force requirement for the electromagnet 6.

[0064] Of course, it is understood that the ratios of L1 to L2 and L3 to L4 can also be set to other values. The specific values of the ratios provided in the embodiments of the present invention are set based on the structural space limitations of the entire machine. The maximum ratio and the minimum ratio represent the maximum and minimum ranges allowed by the structural space. Different values have different requirements for the initial force of electromagnet 6. The combination of the maximum value of the effort lever and the minimum value of the effort-saving lever has the highest initial force requirement for electromagnet 6, which increases the cost of electromagnet 6.

[0065] Furthermore, the rotation plane where the push rod 3 is located and the rotation plane where the exhaust rod 4 is located are arranged perpendicular to each other, so that the push rod 3 swings along the surface of the upper cover 1, and the exhaust rod 4 rotates along the plane perpendicular to the surface of the upper cover 1. The difference in the rotation mode of the push rod 3 and the exhaust rod 4 is mainly based on the consistency of the transmission mode of the labor-saving lever and the labor-consuming lever, so as to realize the driving force of the driving structure in the most labor-saving form, while saving the space of the upper cover 1 and optimizing the exhaust structure.

[0066] As a preferred embodiment, the driving structure can be set as an electromagnet 6, or can be set as a motor or other driving structures, as long as the driving structure can drive the push rod 3 to rotate.

[0067] In more detail, Figure 3 As shown, the electromagnet 6 is used to directly transmit power to the lever structure, thereby enabling the electromagnet 6 to control the exhaust of the pressure relief structure. Alternatively, in addition to the electromagnet 6, the drive structure further includes a push rod, which transmits power between the electromagnet 6 and the lever structure. The push rod cooperates with the lever structure (specifically, the push rod 3) to form a transmission chain, thereby enabling the electromagnet 6 to control the opening of the pressure relief structure.

[0068] In some embodiments, in terms of automatic exhaust, more specifically, an electromagnet 6 and a push rod are provided on the pot body. When working, the electromagnet 6 drives the push rod, the push rod triggers the lever structure, and the lever structure drives the pressure relief structure to exhaust.

[0069] More specifically, the electromagnet 6 is mounted on a plastic housing. The electromagnet 6 and the plastic housing are then assembled and mounted on the outer cover. A push rod is provided between the electromagnet 6 and the outer cover. A push rod reset member is provided between the push rod and the outer cover. The push rod reset member can be a spring, a spring, or an elastomer (such as elastic rubber, silicone, etc.). A push rod 3 is provided at a position on the cover corresponding to the push rod. An exhaust rod 4 is provided between the push rod 3 and the pressure relief structure. The on-off switching of the electromagnet 6 realizes the telescopic action, driving the push rod and push rod 3 to move. The push rod 3 is transmitted through the exhaust rod 4 to drive the opening and closing of the pressure relief structure, thereby realizing the automatic exhaust function.

[0070] It can be understood that this embodiment mainly describes the pot body structure, and the components and structures on the cover assembly involved (such as the push rod 3, the exhaust rod 4, the pressure relief structure, etc.) can be referred to. Figures 1 to 14 structure to understand), I will not go into details here.

[0071] like Figure 13 and 14 As shown, the pressure relief structure includes a pressure relief push rod 7 and a pressure relief valve assembly 2. The pressure relief push rod 7 lifts the pressure relief valve assembly 2 to achieve pressure relief and exhaust. The pressure relief push rod 7 and the pressure relief valve assembly 2 are separated to stop pressure relief and exhaust.

[0072] Furthermore, the pressure relief push rod 7 includes a top portion 71 connected to a rod body 72. An elastic element is provided on the rod body 72. A portion of the top portion 71 contacts the bottom edge of the pressure relief valve assembly 2, allowing the lever structure to drive the rod body 72 toward the bottom surface of the pressure relief valve assembly 2. This compresses the elastic element, causing the top portion 71 to lift the pressure relief valve assembly 2, thereby venting the cover assembly. When the external driving force disappears, the lever structure, due to the restoring force of the elastic element, returns the lever structure and the pressure relief valve assembly 2 to their initial positions.

[0073] Furthermore, a second sealing ring 73 and a second gasket are sleeved on the rod body 72 to connect the pressure relief push rod 7 to the upper cover 1, so that the platform 422 drives the pressure relief push rod 7 to move, and the pressure relief push rod 7 lifts the pressure relief valve assembly 2 to achieve exhaust.

[0074] Furthermore, the pressure relief valve assembly 2 includes a valve body 21, an exhaust pipe 22 is provided on the valve body 21, a fixing part 27 is provided on the exhaust pipe 22, and a first gasket 23, a first sealing ring 24, a gasket 25, and a nut 26 are sequentially sleeved on the outside of the pipe wall of the exhaust pipe 22 to fix the pressure relief valve assembly 2 on the upper cover 1.

[0075] like Figure 2 and Figure 3 As shown, the positional relationship between the lever structure and the pressure relief structure of the cover assembly is shown in the case of automatic exhaust.

[0076] When the cover assembly is automatically venting, the specific operating process is as follows: When electromagnet 6 is energized, the electromagnetic push rod directly acts on notch 35 of push rod 3. The force exerted on push rod 3 causes it to rotate around the center of through hole 31. Protrusion 33 pushes on baffle 43 of the vent rod. Because vent rod 4 is constrained by the structure of upper cover 1, the force exerted on vent rod 4 causes it to rotate around the centerline of connecting post 41. Platform 422 lifts pressure relief push rod 7, which in turn lifts valve body 2, thereby relieving pressure from the cover assembly.

[0077] like Figures 8 to 12 As shown, the handle assembly includes a crank 8 and a rotating member 5. The rotating member 5 and the crank 8 are rotatably connected to drive the rotating member 5 and the crank 8 to rotate relative to each other, so that the rotating member 5 and the exhaust rod 4 abut against each other.

[0078] Specifically, a cantilever 421 is provided on the connecting rod 42 of the exhaust rod 4, and the rotating member 5 and the cantilever 421 are in contact with each other, so that the rotating member 5 drives the connecting column 42 to rotate in the accommodating groove, thereby driving the pressure relief push rod 7 to lift the valve body 2 to achieve pressure relief of the cover assembly.

[0079] Furthermore, the crank 8 and the rotating member 5 are connected via a torsion spring 9 , and the rotating member 5 is manually driven to rotate so that the rotating member 5 and the crank 8 rotate relative to each other at a certain angle, thereby achieving abutment between the rotating member 5 and the cantilever 421 .

[0080] like Figure 9 and Figure 10 As shown, a first boss 81 is provided on the rotating member 5 , and the first boss 81 and the cantilever 421 on the exhaust rod 4 abut against or separate from each other, so that the pressure relief push rod 7 lifts the valve body 2 or the pressure relief push rod 7 is separated from the valve body 2 .

[0081] Furthermore, a protrusion 52 is provided below the first protrusion 51, and a second protrusion 81 is provided on the crank. The protrusion 52 rotates on the second protrusion 81, and a rotation groove is provided on the second protrusion 81 so that the protrusion 52 moves in the rotation groove, thereby realizing an acute angle of relative rotation between the rotating member 5 and the crank 8.

[0082] As a preferred embodiment provided by the present invention, the rotating member 5 and the crank 8 are connected via a torsion spring 9 so that the relative rotation angle between the rotating member 5 and the crank 8 is 0° to 20°.

[0083] like Figure 4 and Figure 5 As shown, the positional relationship between the lever structure and the pressure relief valve assembly is shown when the cover assembly is manually exhausted.

[0084] The lid assembly operates as follows when manually venting: When pressure builds up inside the pot, the steel lid assembly attached to the upper lid 1 engages crank 8, preventing it from rotating. Rotating member 5 then overcomes the force of torsion spring 9 and rotates, with the relative angle between crank 8 and rotating member 5 at 20°. One end of torsion spring 9 fits within a first retaining groove 82 on crank 8, securing it. Rotating member 5 is directly attached to crank 8. A rib on rotating member 5 engages with a second retaining groove 83 on crank 8, while a second boss 81 on crank 8 engages with the first retaining groove 82 on rotating member 5. These two structural features primarily limit the rotation angle of rotating member 5 relative to crank 8 to between 0 and 20°. The other end of torsion spring 9 fits within the second retaining groove 83 on rotating member 5. Due to the force of torsion spring 9, the initial relative rotation angle between rotating member 5 and crank 8 is limited to 20°. Thus, the first boss 51 presses the cantilever 421 , and the platform 422 drives the pressure relief push rod 7 to lift the valve body 2 , driving the pressure relief of the cover assembly.

[0085] The cooking device provided by the second embodiment of the present invention comprises a pot body and a lid assembly as described in any of the above embodiments. Specifically, the lid assembly and the pot body can be detachably engaged, i.e., the lid assembly and the pot body are separate structures. The cooking device provided by the above embodiment of the present invention, by being provided with the lid assembly as described in any of the above embodiments, achieves all the aforementioned beneficial effects, which will not be further elaborated here.

[0086] In the present embodiment, the cooking utensil is an electric pressure cooker. Of course, in embodiments not shown in the figures, the cooking utensil can also be products such as an electric rice cooker, a low-pressure rice cooker, a soybean milk maker, a food processor, a cooking machine, an electric stew pot, a multi-function pot, etc.

[0087] The cover assembly of the present invention has the following advantages: the cover assembly provided by the present invention alternately drives the lever structure through the handle assembly and the driving structure, so that the lever structure lifts the pressure relief valve assembly, thereby achieving pressure relief of the rice cooker and improving user experience; by arranging the driving structure, the lever structure, the handle assembly and the pressure relief valve assembly on the upper cover 1, automatic exhaust and manual exhaust are achieved, the structure is simple, the exhaust structure is optimized, and the space occupied by the exhaust structure is reduced.

[0088] The present invention is further described above with the aid of specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the essence and scope of the present invention. Various modifications made to the above embodiments by ordinary technicians in this field after reading this specification are all within the scope of protection of the present invention.

Claims

1. A cover assembly, characterized in that: The device comprises an upper cover, wherein a pressure relief structure, a driving structure and a lever structure are provided on the upper cover. The lever structure comprises a labor-intensive end and a labor-saving end. The driving structure drives the labor-saving end to rotate so that the labor-intensive end drives the pressure relief structure to exhaust gas. The driving structure comprises an electromagnet. The electromagnet contacts the labor-saving end so that the electromagnet drives the labor-saving end to rotate. The lever structure includes a push rod and an exhaust rod. The push rod and the exhaust rod are in contact with each other. The push rod is driven to rotate the exhaust rod, thereby realizing that the exhaust rod drives the pressure relief structure to exhaust. The rotation plane where the push rod is located and the rotation plane where the exhaust rod is located are arranged perpendicular to each other.

2. The cover assembly according to claim 1, wherein: A through hole is provided on the push rod, and the through hole is rotatably connected to a convex column provided on the upper cover, so that the push rod can rotate on the upper cover.

3. The cover assembly according to claim 2, wherein: A limiting block is provided on the upper cover, and a groove is provided on the push rod. The groove and the limiting block are clearance-matched to limit the rotation range of the push rod.

4. The cover assembly according to claim 3, wherein: A protrusion is provided on the push rod, and the protrusion contacts the exhaust rod. The driving structure drives the protrusion to rotate so that the protrusion and the exhaust rod abut against each other, thereby driving the rotation of the exhaust rod.

5. The cover assembly according to claim 4, wherein: The force arm distance between the protrusion and the through hole is set to L1, a notch is provided on the push rod, the driving structure is in contact with the notch, and the force arm distance between the notch and the through hole is set to L2. L1 is smaller than L2, so that the force generated by the protrusion is greater than the force received by the notch, and the end of the push rod where the notch is located is the force-saving end.

6. The cover assembly according to claim 5, wherein: The ratio of the force arm distance L1 between the protrusion and the through hole to the force arm distance L2 between the notch and the through hole is 0.2-0.

3.

7. The cover assembly according to claim 4, wherein: The exhaust rod includes a connecting column and a connecting rod. The connecting column and the connecting rod are fixedly connected. The connecting column and the push rod are in contact so that the push rod pushes the connecting column to rotate, thereby driving the rotation of the connecting rod.

8. The cover assembly according to claim 7, wherein: A limiting groove is provided on the limiting block, and the connecting column rotates in the limiting groove to limit the rotation range of the exhaust rod.

9. The cover assembly according to claim 7, wherein: A baffle is provided on the connecting column, and the protrusion abuts against the baffle provided on the connecting column, so that the push rod drives the exhaust rod to rotate.

10. The cover assembly according to claim 8, wherein: A platform is provided on the exhaust rod, and the connecting rod is connected to the platform. The pressure relief structure includes a pressure relief push rod and a pressure relief valve assembly. The connecting rod rotates so that the platform drives the pressure relief push rod to lift the pressure relief valve assembly, thereby realizing pressure relief and exhaust.

11. The cover assembly according to claim 10, wherein: A center line is set in the length direction of the connecting column, and the center line is the rotation center of the exhaust rod. The distance between the point where the convex action on the baffle and the center line is set to L3, and the distance between the platform and the center line is set to L4. L4 is greater than L3, so that the force applied to the platform is less than the abutment force of the convex action on the baffle.

12. The cover assembly according to claim 11, wherein: The ratio of the distance L4 between the platform and the center line to the distance L3 between the point of action of the projection on the baffle and the center line is 7 to 8.

13. A cooking utensil, characterized in that: Comprising the cover assembly according to any one of claims 1-12.

Images