A sealing structure and electric pressure cooker

Abstract

This invention provides a sealing structure and an electric pressure cooker. The sealing structure includes a support plate, with a sealing element installed at the bottom edge of the support plate. The bottom inner ring of the sealing element has a first abutment portion, and the bottom outer ring has a second abutment portion. A pushing structure is installed at the top edge of the support plate, with a first clamping element corresponding to the first abutment portion and a second clamping element corresponding to the second abutment portion. A transmission assembly is installed on the top surface of the support plate, and a through hole is provided through the middle of the support plate, with a piston slidably installed at the through hole. When the piston is pushed upward, it can apply force to the transmission assembly, which in turn provides a downward force to the pushing structure, causing the first clamping element to push the first abutment portion towards the inner wall of the inner pot, and the second clamping element to push the second abutment portion towards the outer side of the inner pot. The sealing structure additionally adds a mechanical clamping component to achieve a secondary clamping and sealing action, effectively strengthening the overall sealing performance and improving safety and applicability.

Description

Technical Field

[0001] This invention relates to the field of electric pressure cookers, and more specifically, to a sealing structure and an electric pressure cooker. Background Technology

[0002] As a highly efficient and energy-saving modern kitchen appliance, the electric pressure cooker works by increasing the internal pressure of the pot to raise the boiling point of water, thus creating a high-temperature, high-pressure cooking environment. Ensuring a reliable airtight seal between the lid and the pot is crucial for product safety, energy efficiency, and cooking results. Currently, most electric pressure cookers on the market use sealing rings to achieve this sealing function; however, most of these sealing rings rely solely on the clamping force between the lid and the inner pot to apply force, providing only a vertical force. While this meets basic sealing requirements, as users demand higher levels of safety, durability, and applicability from electric pressure cookers, this sealing structure is insufficient and no longer suitable, thus requiring improvement. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a sealing structure and an electric pressure cooker. The sealing structure provided by the invention adds a mechanical pressing component to realize a secondary pressing and sealing action, which effectively enhances the overall sealing performance and improves the safety and applicability of use.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] This invention provides a sealing structure, including a support plate, a sealing element installed at the bottom edge of the support plate, the sealing element forming a closed loop around the center of the support plate; the bottom inner ring of the sealing element has a first abutment portion, and the bottom outer ring has a second abutment portion, respectively corresponding to the inner and outer sides of the top of the inner pot; a pushing structure is installed at the top edge of the support plate, the pushing structure having a first clamping member corresponding to the first abutment portion and a second clamping member corresponding to the second abutment portion; a transmission assembly is installed on the top surface of the support plate, a through hole is provided through the middle of the support plate, and a piston is slidably installed at the through hole; when the piston is subjected to force and moves upward, it can apply force to the transmission assembly, and the transmission assembly provides a downward force to the pushing structure, causing the first clamping member to push the first abutment portion towards the inner wall of the top of the inner pot, and causing the second clamping member to push the second abutment portion towards the outer side of the top of the inner pot.

[0006] In a preferred embodiment of the present invention, the sealing element includes a first support ring, a second support ring, and a sealing ring; the first and second support rings are mounted on the bottom of a support plate by screws; the top inner and outer rings of the sealing ring are respectively fixedly connected to the bottom of the first and second support rings; the bottom of the sealing ring is provided with a groove, the groove having a closed-loop structure around the axis of the sealing ring, and the outer wall of the groove forming a second abutment portion; the interior of the sealing ring is provided with a clamping cavity, the bottom of the clamping cavity near the center of the sealing ring extending downward to the groove wall of the groove, forming a first abutment portion; the top of the clamping cavity is provided with an annular opening, which is correspondingly located in the area between the first and second support rings; a first pressing member is provided in the clamping cavity to push the first abutment portion from the inside; a second pressing member is correspondingly located on the outer side of the outer ring of the second support ring to push the second abutment portion.

[0007] In a preferred embodiment of the present invention, the bottom of the first support ring is provided with a first clamping groove, and the bottom of the second support ring is provided with a second clamping groove. Both the second clamping groove and the first clamping groove are L-shaped groove structures and form a closed loop structure around the center. The top inner and outer rings of the sealing ring are respectively fixedly provided with a first clamping block and a second clamping block. The shape of the first clamping block is adapted to the shape of the first clamping groove, and the shape of the second clamping block is adapted to the shape of the second clamping groove. The first clamping block is fixedly engaged in the first clamping groove, and the second clamping block is fixedly engaged in the second clamping groove. The top surface of the first support ring is provided with a first convex ring, and the top surface of the second support ring is provided with a second convex ring. The bottom surface of the support plate is correspondingly provided with a first annular groove and a second annular groove. The first convex ring is engaged in the first annular groove and fixed by screws, and the second convex ring is engaged in the second annular groove and fixed by screws. A first sealing gasket is clamped at the connection between the first convex ring and the first annular groove, and at the connection between the second convex ring and the second annular groove.

[0008] In a preferred embodiment of the present invention, the pressing structure includes a first pressing member, a second pressing member, a pressure plate, and a spring sheet; the first pressing member includes a first pressure ring, the top surface of which is fixedly provided with a plurality of first guide posts arranged in a circular array around the center; the second pressing member includes a second pressure ring, the top surface of which is fixedly provided with a plurality of second guide posts arranged in a circular array around the center; a support plate is provided with a plurality of first guide holes corresponding to the first guide posts, and a support plate is provided with a plurality of second guide holes corresponding to the second guide posts; the first pressure ring is disposed in the clamping cavity, the first... The guide post extends out of the top surface of the support plate through the first guide hole and is fixedly connected to the pressure plate by screws; the second pressure ring is located on the side of the second contact part away from the groove, the second guide post extends out of the top surface of the support plate through the second guide hole and is fixedly connected to the pressure plate by screws; the top surface of the support plate is provided with multiple slots arranged in a circular array around the center, the slots are located between the outline of the first guide hole and the second guide hole, the bottom of the spring piece is placed in the slot, the top of the spring piece abuts against the bottom surface of the pressure plate, and the multiple spring pieces provide the pressure plate with an upward pushing force.

[0009] In a preferred embodiment of the present invention, a first sliding surface is provided at the edge position of the groove inside the clamping cavity, and a third sliding surface is provided on one side of the bottom of the first pressure ring. The shape of the third sliding surface is adapted to the shape of the first sliding surface. When the first pressure ring is subjected to force and moves downward, it pushes the first sliding surface through the third sliding surface, so that the first abutting part is pressed tightly against the top inner wall of the inner pot. A second sliding surface is provided on the top of the side of the second abutting part away from the groove, and a fourth sliding surface is provided on one side of the bottom of the second pressure ring. The shape of the fourth sliding surface is adapted to the shape of the second sliding surface. When the second pressure ring is subjected to force and moves downward, it pushes the second sliding surface through the fourth sliding surface, so that the second abutting part is pressed tightly against the top outer wall of the inner pot.

[0010] In a preferred embodiment of the present invention, the transmission assembly includes multiple pressure members arranged in a circular array around the center of the support plate; each pressure member includes a push rod, one end of which extends to a through hole, and the other end extends towards the edge of the support plate to the inner ring side near the pressure plate, and a pressure block is fixedly connected to the end of the push rod; the top surface of the support plate is fixedly provided with two opposing upright plates corresponding to the multiple pressure blocks, the upright plates are located on both sides of the end of the pressure block near the push rod, the distance between the two upright plates is adapted to the width of the pressure block, and the pressure block is rotatably mounted between the two upright plates by a pin; the end of the pressure block away from the push rod is raised upward and extends above the top surface of the pressure plate; when the piston is subjected to force and moves upward, it can apply upward force to the end of the push rod, and provide downward force to the pushing structure through the pressure block.

[0011] In a preferred embodiment of the present invention, a protrusion is fixedly provided on the bottom surface of the raised end of the pressure block, and the bottom surface of the protrusion has an outwardly convex arc shape; when the pushing structure and the transmission assembly are both in the initial state, the bottom surface of the protrusion abuts against the top surface of the pressure plate.

[0012] In a preferred embodiment of the present invention, the end face of the push rod away from the pressure block is a spherical protrusion structure; the top of the piston is a frustoconical structure, and the end face of the push rod slides against the top side wall of the piston.

[0013] In a preferred embodiment of the present invention, a convex tube is fixedly provided on the bottom surface of the support plate outside the bottom end of the through hole, the inner diameter of the convex tube being larger than the diameter of the through hole; the outer wall of the convex tube is threaded, and a cover is threadedly connected to the convex tube, the bottom surface of the cover having a through hole in the middle; the diameter of the through hole is smaller than the bottom diameter of the piston; the piston includes a column block, a push block is fixedly provided on the top surface of the column block, the diameter of the column block is adapted to the inner diameter of the convex tube, the push block has a frustum-shaped structure, and the bottom diameter of the push block is smaller than the diameter of the through hole; the column block and the push block have cavities inside, and the piston is a closed shell structure; a second sealing gasket is fixedly provided on the top and bottom edges of the column block.

[0014] The present invention also provides an electric pressure cooker, including a lid, on which the aforementioned sealing structure is installed.

[0015] The beneficial effects of this invention are as follows:

[0016] This invention provides a sealing structure and an electric pressure cooker. The sealing structure includes a support plate, and a sealing element is installed at the bottom edge of the support plate. The sealing element has a closed-loop structure around the center of the support plate. The bottom inner ring of the sealing element has a first abutment portion, and the bottom outer ring has a second abutment portion, which are respectively provided on the inner and outer sides of the top of the inner pot. When it is closed on the top of the inner pot, the first abutment portion abuts against the inner wall of the top of the inner pot, and the second abutment portion abuts against the outer wall of the top of the inner pot. The area between the first abutment portion and the second abutment portion is in close contact with the top surface of the inner pot, providing cooperation of multiple parts.

[0017] Furthermore, a pushing structure is installed at the top edge of the support plate. The pushing structure has a first clamping member corresponding to the first contact part and a second clamping member corresponding to the second contact part. A transmission assembly is installed on the top surface of the support plate. A through hole is provided through the middle of the support plate, and a piston is slidably installed at the through hole. When the piston is subjected to force and moves upward, it can apply force to the transmission assembly, which in turn provides a downward force to the pushing structure. This causes the first clamping member to push the first contact part against the inner wall of the top of the inner pot, and the second clamping member to push the second contact part against the outer side of the top of the inner pot. In addition to the vertical force provided when the lid is closed, the first clamping member pushes the first contact part against the first contact part, and the second clamping member pushes the second contact part against the second contact part. This provides an additional secondary seal for the inner and outer walls of the top of the inner pot, forming a multi-seal effect. This effectively enhances the overall sealing performance and improves the safety and applicability of use.

[0018] The design and coordination of the pushing structure, transmission components, and piston components allow the use of steam pressure during the operation of the electric pressure cooker to achieve the required pushing and pressing effect without the need for additional electric drive components, making it safer and more reliable. Attached Figure Description

[0019] Figure 1 This is a first-view perspective three-dimensional structural diagram of a sealing structure provided in a specific embodiment of the present invention;

[0020] Figure 2 This is a second-view perspective three-dimensional structural diagram of a sealing structure provided in a specific embodiment of the present invention;

[0021] Figure 3 This is a first-view three-dimensional unfolded structural schematic diagram of a sealing structure provided in a specific embodiment of the present invention;

[0022] Figure 4 This is a second-view three-dimensional unfolded structural diagram of a sealing structure provided in a specific embodiment of the present invention;

[0023] Figure 5 This is a cross-sectional view of a sealing structure provided in a specific embodiment of the present invention;

[0024] Figure 6 yes Figure 5 Enlarged view of section A;

[0025] Figure 7 This is a first-view perspective three-dimensional structural diagram of the support plate provided in a specific embodiment of the present invention;

[0026] Figure 8 This is a three-dimensional structural diagram of the support plate provided in a specific embodiment of the present invention from a second perspective;

[0027] Figure 9 This is a three-dimensional structural schematic diagram of the sealing element provided in a specific embodiment of the present invention;

[0028] Figure 10 This is a partial cross-sectional view of the sealing element provided in a specific embodiment of the present invention;

[0029] Figure 11 This is a three-dimensional structural diagram of the pressing component provided in a specific embodiment of the present invention;

[0030] Figure 12 This is a three-dimensional structural diagram of the pot lid provided in a specific embodiment of the present invention.

[0031] In the picture:

[0032] 100, Support plate; 110, First annular groove; 120, Second annular groove; 130, Through hole; 140, First guide hole; 150, Second guide hole; 160, Slot; 170, Vertical plate; 180, Protruding tube;

[0033] 200, Seal; 210, First abutment; 220, Second abutment; 230, First support ring; 232, First convex ring; 240, Second support ring; 242, Second convex ring; 250, Sealing ring; 251, Groove; 252, Clamping cavity; 253, Annular opening; 254, First clamping block; 255, Second clamping block; 261, First sliding surface; 262, Second sliding surface;

[0034] 300. Pushing structure; 310. First clamping element; 311. First pressure ring; 312. First guide post; 313. Third sliding surface; 320. Second clamping element; 321. Second pressure ring; 322. Second guide post; 323. Fourth sliding surface; 330. Pressure plate; 340. Spring piece;

[0035] 400. Transmission assembly; 410. Pressing element; 411. Push rod; 412. Pressing block; 413. Protrusion;

[0036] 500. Piston component; 510. Column block; 520. Push block; 530. Cavity;

[0037] 600, First sealing gasket; 700, Cover; 710, Perforation. Detailed Implementation

[0038] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] like Figures 1 to 7 As shown, a specific embodiment of the present invention discloses a sealing structure, including a support plate 100. A sealing element 200 is installed at the bottom edge of the support plate 100, and the sealing element has a closed-loop structure around the center of the support plate. The bottom inner ring of the sealing element 200 is provided with a first abutment portion 210, and the bottom outer ring is provided with a second abutment portion 220, which are respectively provided corresponding to the inner and outer sides of the top of the inner pot. A pushing structure 300 is installed at the top edge of the support plate 100, and the pushing structure 300 is provided with a first abutment portion 220 corresponding to the first abutment portion 210. A clamping member 310 is provided corresponding to the second contact part 220; a transmission assembly 400 is installed on the top surface of the support plate 100, and a through hole 130 is provided through the middle of the support plate 100. A piston member 500 is slidably provided at the through hole 110; when the piston member is subjected to force and moves upward, it can apply force to the transmission assembly, and the transmission assembly provides a downward force to the pushing structure, so that the first clamping member pushes the first contact part towards the inner wall of the top of the inner pot, and the second clamping member pushes the second contact part towards the outer side of the top of the inner pot.

[0040] The aforementioned sealing structure, when it is closed on the top of the inner pot, has a first contact part abutting against the inner wall of the top of the inner pot, a second contact part abutting against the outer wall of the top of the inner pot, and the area between the first contact part and the second contact part closely adhering to the top surface of the inner pot, providing a fit between multiple parts.

[0041] In addition to the vertical force provided when the lid is closed, the first pressing member pushes against the first contact part, and the second pressing member pushes against the second contact part, thereby adding a secondary seal to the inner wall and outer wall of the top of the inner pot, forming a multi-seal effect, effectively strengthening the overall sealing performance, and improving the safety and applicability of use.

[0042] The design and coordination of the pushing structure, transmission components, and piston components allow the use of steam pressure during the operation of the electric pressure cooker to achieve the required pushing and pressing effect without the need for additional electric drive components, making it safer and more reliable.

[0043] Furthermore, such as Figures 6 to 9As shown, the seal 200 includes a first support ring 230, a second support ring 240, and a sealing ring 250; the first support ring 230 and the second support ring 240 are installed on the bottom of the support plate 100 by screws; the top inner and outer rings of the sealing ring 250 are respectively fixedly connected to the bottom of the first support ring 230 and the second support ring 240; the seal is detachably mounted on the support plate, which means that the seal can be manufactured and processed as an independent component, and can also be disassembled and replaced.

[0044] The sealing ring 250 has a groove 251 at its bottom, which is a closed loop around the axis of the sealing ring. The outer wall of the groove 251 forms a second contact part 220. The sealing ring 250 has a clamping cavity 252 inside. The bottom of the clamping cavity 252 near the center of the sealing ring extends downward to the groove wall of the groove 251, forming a first contact part 210. The groove is designed to be the main part that fits with the top of the inner pot. When the lid is closed, the top of the inner pot is inserted into the groove to make a large-scale sealing contact and provide the main sealing effect. The clamping cavity provides a better deformation basis for the first contact part, so that it can better fit the inner wall of the top of the inner pot and achieve better sealing performance.

[0045] The top of the clamping cavity 252 is provided with an annular opening 253, which is located in the area between the first support ring 230 and the second support ring 240. The first clamping member 310 is located in the clamping cavity 252 and pushes the first abutting part 210 from the inside. The second clamping member 320 is located on the outer side of the outer ring of the second support ring 240 and is used to push the second abutting part 220. The design of the annular opening provides a place for the clamping cavity to be used as the installation location of the first clamping member. Moreover, the installation is carried out inside the sealing ring, which means that the installation of the first clamping member will not damage the sealing performance of the sealing ring, and there is no need to consider adding other more complex sealing components due to the installation of the first clamping member.

[0046] Furthermore, such as Figure 10As shown, the bottom of the first support ring 230 is provided with a first clamping groove, and the bottom of the second support ring 240 is provided with a second clamping groove. Both the second clamping groove and the first clamping groove are L-shaped groove structures and form a closed loop structure around the center. The top inner and outer rings of the sealing ring 250 are respectively fixed with a first clamping block 254 and a second clamping block 255. The shape of the first clamping block is adapted to the shape of the first clamping groove, and the shape of the second clamping block is adapted to the shape of the second clamping groove. The first clamping block 254 is fixedly clamped in the first clamping groove, and the second clamping block 255 is fixedly clamped in the second clamping groove. More specifically, the sealing ring is fixedly connected to the first support ring and the second support ring by a secondary injection molding method. First, the first support ring and the second support ring are placed in the mold, and then liquid silicone is injected into the mold, so that the liquid silicone flows into the first clamping groove and the second clamping groove to form the corresponding first clamping block and the second clamping block, thereby achieving a stable connection. This structural design allows the sealing ring and the first support ring and the second support ring to be modular structural components, which can be disassembled and replaced as a whole, which is convenient for actual use.

[0047] like Figure 6 , Figures 8 to 10 As shown, the top surface of the first support ring 230 is provided with a first protruding ring 232, and the top surface of the second support ring 240 is provided with a second protruding ring 242; the bottom surface of the support plate 100 is correspondingly provided with a first annular groove 110 and a second annular groove 120; the first protruding ring 232 is engaged in the first annular groove 110 and fixed by screws, and the second protruding ring 242 is engaged in the second annular groove 120 and fixed by screws, and a first sealing gasket 600 is provided at the connection between the first protruding ring and the first annular groove, and at the connection between the second protruding ring and the second annular groove; the first annular groove is provided with a first sealing gasket 600. The second annular groove facilitates the alignment and installation of the first and second support rings. The holes of the first and second convex rings are located on the top surface, and the support plate has corresponding holes. Screws for fixing the first and second support rings are installed from the top surface of the support plate to secure them and prevent the screws from contacting the food inside the pot. The first sealing gasket strengthens the connection between the first and second support rings and the support plate, and seals the connection to prevent air leakage.

[0048] Furthermore, such as Figures 3 to 6As shown, the pressing structure 300 includes a first pressing member 310, a second pressing member 320, a pressure plate 330, and a spring sheet 340; the first pressing member 310 includes a first pressing ring 311, and a plurality of first guide posts 312 arranged in a circular array around the center are fixed on the top surface of the first pressing ring 311; the second pressing member 320 includes a second pressing ring 321, and a plurality of second guide posts 322 arranged in a circular array around the center are fixed on the top surface of the second pressing ring 321; a plurality of first guide holes 140 are provided on the support plate 100 corresponding to the first guide posts 312, and a plurality of second guide holes 150 are provided on the support plate 100 corresponding to the second guide posts 322; the first pressing ring 311 is disposed in the clamping cavity 252, the first pressing member 310, the second pressing member 32 ... A guide post 312 extends out of the top surface of the support plate 100 through the first guide hole 140 and is fixedly connected to the pressure plate 330 by screws; a second pressure ring 321 is located on the side of the second contact portion 220 away from the groove 251, and a second guide post 322 extends out of the top surface of the support plate 100 through the second guide hole 150 and is fixedly connected to the pressure plate 330 by screws; this structural design and cooperation can effectively limit the movement trajectory of the first and second pressing parts through the cooperation of the first guide post and the first guide hole, and the cooperation of the second guide post and the second guide hole, so that the first pressure ring can accurately push the first contact portion, and the second pressure ring can accurately push the second contact portion, thereby achieving an effective pressing and sealing effect;

[0049] The support plate 100 has multiple slots 160 arranged in a circular array around its center on its top surface. The slots are located between the outlines of the first guide hole and the second guide hole. The bottom of the spring piece 340 is placed in the slot 160, and the top of the spring piece 340 abuts against the bottom surface of the pressure plate 330. The multiple spring pieces provide an upward pushing force to the pressure plate, so that the first pressure ring disengages from the first contact part and the second pressure ring disengages from the second contact part without the action of other external forces. This allows the first and second contact parts to maintain their original deformation conditions, facilitating smooth closing and preventing interference with the inner pot.

[0050] Furthermore, such as Figure 6 , Figure 10As shown, a first sliding surface 261 is provided inside the clamping cavity 252 at the edge position corresponding to the groove, and a third sliding surface 313 is provided on one side of the bottom of the first pressure ring 311. The shape of the third sliding surface is adapted to the first sliding surface. When the first pressure ring 311 is subjected to force and moves downward, the third sliding surface 313 pushes the first sliding surface 261, so that the first contact part is pressed tightly against the top inner wall of the inner pot. A second sliding surface 262 is provided on the top of the side of the second contact part 220 away from the groove, and the second pressure ring... A fourth sliding surface 323 is provided on one side of the bottom of 321. The shape of the fourth sliding surface is adapted to the shape of the second sliding surface. When the second pressure ring 321 is moved downward under force, the fourth sliding surface 323 pushes the second sliding surface 262, so that the second contact part is pressed tightly against the top outer wall of the inner pot. This structural design can further enhance the pushing effect of the first pressure ring and the second pressure ring on the first contact part and the second contact part respectively, and provide a tighter fit in accordance with the direction of silicone deformation, thereby enhancing the sealing effect.

[0051] Furthermore, the transmission assembly 400 includes multiple pressure members 410 arranged in a circumferential array around the center of the support plate 100; such as Figure 11 As shown, the pressure member 410 includes a push rod 411, one end of which extends to the through hole 130, and the other end extends towards the edge of the support plate to the inner ring side near the pressure plate, and a pressure block 412 is fixedly connected to the end. The top surface of the support plate 100 is fixedly provided with two opposing upright plates 170 corresponding to the multiple pressure blocks 412. The upright plates are located on both sides of the ends of the pressure blocks near the push rod, and the distance between the two upright plates 170 is adapted to the width of the pressure block 412. The pressure block 412 is rotatably mounted between the two upright plates 170 via a pin. The pressure block 412 is further... One end of the push rod 411 curves upward and extends above the top surface of the pressure plate 330. When the piston moves upward under force, it can apply upward force to the end of the push rod, and provide downward force to the pushing structure through the pressure block. This structural design utilizes the principle of levers, using high-pressure gas inside the pot to push the piston upward, lift the end of the push rod upward, thereby pressing the pressure block downward, and thus pressing down on the pressure plate. The use of multiple pressure components in a circumferential distribution makes the force distribution more uniform, the force applied to the sealing part more balanced, and enhances the overall sealing effect.

[0052] Furthermore, such as Figure 5 As shown, a protrusion 413 is fixedly provided on the bottom surface of the raised end of the pressure block 412. The bottom surface of the protrusion 413 has an outwardly convex arc shape. When the pushing structure and the transmission component are in the initial state, the bottom surface of the protrusion abuts against the top surface of the pressure plate. This design allows direct contact between the arc surface of the protrusion and the pressure plate. Based on the fact that the pressure component applies force to the pressure plate by swinging, the contact pushing effect can be maintained continuously, and the force can be applied continuously.

[0053] Furthermore, such as Figure 1As shown, the end face of the push rod 411 away from the pressure block 412 is a spherical protrusion structure; the top of the piston 500 is a frustoconical structure, and the end face of the push rod 411 slides against the top side wall of the piston 500; reducing the contact area and reducing the friction force of the piston moving upward, but without affecting the action and effect of the rising piston lifting the push rod.

[0054] Furthermore, such as Figure 3 , Figure 8 As shown, a protruding tube 180 is fixedly provided on the bottom surface of the support plate 100 outside the bottom end of the through hole 130. The inner diameter of the protruding tube 180 is larger than the diameter of the through hole 130. The outer wall of the protruding tube is threaded, and a cover 700 is threadedly connected to the protruding tube 180. A through hole 710 is provided in the middle of the bottom surface of the cover 700. The diameter of the through hole 710 is smaller than the bottom diameter of the piston 500. The piston 500 includes a column block 510, and a push block 520 is fixedly provided on the top surface of the column block 510. The diameter of the column block 510 is adapted to the inner diameter of the protruding tube 180. The push block 520 has a frustum-shaped structure, and the bottom diameter of the push block is smaller than the diameter of the through hole. A cavity 530 is provided inside the column block 510 and the push block 520. The piston is a sealed... The closed, shell-like structure reduces overall weight and facilitates subsequent pushing. Second sealing gaskets are fixed to the top and bottom edges of the column block. The protruding tube and cover provide installation locations and vertical movement guidance for the piston component. When the internal pressure reaches a preset value, the piston component can be pushed upwards. Due to the limited diameter of the through hole, the second sealing gasket on the top surface of the column block abuts against the bottom surface of the support plate, maintaining the sealing effect and the pushing effect under internal pressure. The upper push block pushes the push rod up and maintains the lifted state, enabling the pushing structure to achieve and maintain the downward pressing action, thereby completing the pushing and maintaining of the first and second contact parts, achieving an overall enhanced sealing effect.

[0055] The outer wall of the cover is fixed with multiple raised ridges arranged in a circular array around the center, providing gripping parts for easy disassembly and assembly, and facilitating the removal of the internal piston components for cleaning.

[0056] A specific embodiment of the present invention also discloses an electric pressure cooker, including a lid, such as... Figure 12 As shown, the sealing structure described above is installed on the pot lid.

[0057] This invention has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. This invention is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims are also within the protection scope of this invention.

Claims

1. A sealing structure, characterized in that: Includes a support plate, with a seal installed at the bottom edge of the support plate, the seal forming a closed loop around the center of the support plate; The bottom inner ring of the seal is provided with a first contact part, and the bottom outer ring is provided with a second contact part, which are respectively provided on the inner and outer sides of the top of the inner pot; A pushing structure is installed on the top edge of the support plate. The pushing structure has a first pressing member corresponding to the first contact part and a second pressing member corresponding to the second contact part. A transmission assembly is installed on the top surface of the support plate, and a through hole is provided through the middle of the support plate, with a piston component slidingly installed at the through hole; When the piston moves upward under force, it can apply force to the transmission assembly, which in turn provides downward force to the pushing structure, causing the first pressing member to push the first contact part against the inner wall of the top of the inner pot, and the second pressing member to push the second contact part against the outer side of the top of the inner pot.

2. The sealing structure according to claim 1, characterized in that: The sealing element includes a first support ring, a second support ring, and a sealing ring; The first support ring and the second support ring are installed on the bottom of the support plate by screws; The top inner and outer rings of the sealing ring are respectively fixedly connected to the bottom of the first support ring and the second support ring; The bottom of the sealing ring is provided with a groove, which is a closed loop structure around the axis of the sealing ring, and the outer wall of the groove forms a second contact part. The sealing ring has a cavity inside, and the bottom of the cavity near the center of the sealing ring extends downward to the groove wall to form the first contact part; The top of the clamping cavity is provided with an annular opening, which is located in the area between the first support ring and the second support ring. The first clamping member is located in the clamping cavity and pushes the first abutting part from the inside; The second clamping member is located on the outer side of the outer ring of the second support ring and is used to push the second abutting part.

3. The sealing structure according to claim 2, characterized in that: The bottom of the first support ring is provided with a first clamping groove, and the bottom of the second support ring is provided with a second clamping groove. Both the second clamping groove and the first clamping groove are L-shaped groove structures and form a closed loop structure around the center. The top inner and outer rings of the sealing ring are respectively fixed with a first clamping block and a second clamping block. The shape of the first clamping block is adapted to the shape of the first clamping groove, and the shape of the second clamping block is adapted to the shape of the second clamping groove. The first clamping block is fixedly clamped in the first clamping groove, and the second clamping block is fixedly clamped in the second clamping groove. The top surface of the first support ring is provided with a first convex ring, and the top surface of the second support ring is provided with a second convex ring; the bottom surface of the support plate is provided with a first annular groove and a second annular groove respectively; the first convex ring is engaged in the first annular groove and fixed by screws, the second convex ring is engaged in the second annular groove and fixed by screws, and a first sealing gasket is provided at the connection between the first convex ring and the first annular groove and at the connection between the second convex ring and the second annular groove.

4. A sealing structure according to claim 3, characterized in that: The pressing structure includes a first pressing element, a second pressing element, a pressure plate, and a spring sheet; The first clamping component includes a first pressure ring, and the top surface of the first pressure ring is fixedly provided with a plurality of first guide posts arranged in a circular array around the center; The second clamping component includes a second pressure ring, and the top surface of the second pressure ring is fixedly provided with multiple second guide posts arranged in a circular array around the center; The support plate has multiple first guide holes corresponding to the first guide post, and the support plate has multiple second guide holes corresponding to the second guide post; The first pressure ring is located in the clamping cavity, and the first guide post extends out of the top surface of the support plate through the first guide hole and is fixedly connected to the pressure plate by screws. The second pressure ring is located on the side of the second contact portion away from the groove, and the second guide post extends out of the top surface of the support plate through the second guide hole and is fixedly connected to the pressure plate by screws; The top surface of the support plate is provided with multiple slots arranged in a circular array around the center. The slots are located between the first guide hole and the second guide hole, which are mostly within the outline range. The bottom of the spring is placed in the slot, and the top of the spring abuts against the bottom surface of the pressure plate. The multiple springs provide the pressure plate with an upward pushing force.

5. A sealing structure according to claim 4, characterized in that: The first sliding surface is provided at the edge of the groove inside the clamping cavity, and the third sliding surface is provided on the bottom side of the first pressure ring. The shape of the third sliding surface is adapted to the first sliding surface. When the first pressure ring is subjected to force and moves downward, it pushes the first sliding surface through the third sliding surface, so that the first contact part is pressed tightly against the top inner wall of the inner pot. The second contact part has a second sliding surface on the top of the side away from the groove, and a fourth sliding surface is provided on the bottom side of the second pressure ring. The shape of the fourth sliding surface is adapted to the second sliding surface. When the second pressure ring is subjected to force and moves downward, it pushes the second sliding surface through the fourth sliding surface, so that the second contact part is pressed tightly against the top outer wall of the inner pot.

6. A sealing structure according to claim 4, characterized in that: The transmission assembly includes multiple pressure members arranged in a circular array around the center of the support plate; The pressure component includes a push rod, one end of which extends to the through hole, and the other end extends toward the edge of the support plate to the inner ring side near the pressure plate, and a pressure block is fixedly connected to the end of the push rod; The top surface of the support plate is fixed with two opposing vertical plates corresponding to multiple pressure blocks. The vertical plates are located on both sides of the end of the pressure block near the push rod. The distance between the two vertical plates is adapted to the width of the pressure block. The pressure block is rotatably installed between the two vertical plates by a pin. The end of the pressure block away from the push rod curves upward and extends above the top surface of the pressure plate; When the piston moves upward under force, it can apply upward force to the end of the push rod, and provide downward force to the pushing structure through the pressure block.

7. A sealing structure according to claim 6, characterized in that: The bottom surface of the raised end of the pressure block is fixed with a protrusion, and the bottom surface of the protrusion has an outward convex arc shape. When the pushing structure and transmission components are in their initial state, the bottom surface of the protrusion abuts against the top surface of the pressure plate.

8. A sealing structure according to claim 7, characterized in that: The end face of the push rod away from the pressure block has a spherical protrusion structure; The top of the piston is truncated cone-shaped, and the end face of the push rod slides against the top side wall of the piston.

9. A sealing structure according to claim 8, characterized in that: A protruding tube is fixed on the bottom surface of the support plate at the bottom outer end of the through hole. The inner diameter of the protruding tube is larger than the diameter of the through hole. The outer wall of the protruding tube is threaded. A cover is installed at the threaded connection of the protruding tube. A through hole is provided in the middle of the bottom surface of the cover. The diameter of the through hole is smaller than the bottom diameter of the piston. The piston assembly includes a piston block, and a pusher block is fixedly provided on the top surface of the piston block. The diameter of the piston block is adapted to the inner diameter of the convex tube. The pusher block has a frustum-shaped structure, and the bottom diameter of the pusher block is smaller than the diameter of the through hole. The internal cavity of the column block and push block is provided, and the piston component is a closed shell structure; A second sealing gasket is fixedly provided on the top and bottom edges of the column block.

10. An electric pressure cooker, characterized in that: Includes a pot lid, on which a sealing structure as described in any one of claims 1 to 9 is installed.

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