Safe pressure cooker

Abstract

The utility model discloses a safety pressure cooker which comprises a cooker cover and a cooker body, and the cooker cover comprises a pressure cover, a panel, a buckling assembly, a working valve assembly, a knob assembly, a center stud and a center nut; a first mounting groove is formed in the panel, and a step structure is arranged in the first mounting groove; the center stud sequentially penetrates through the rotary knob assembly, the panel and the pressure cover and then is screwed with the center nut. The working valve assembly comprises a working valve element, an adjusting piece, an air valve nut and a valve bonnet. The working valve element penetrates through the first mounting groove and the pressure cover and then is screwed with the air valve nut, and the adjusting piece is arranged on the periphery of the working valve element in a sleeving mode; the lower side of the adjusting piece protrudes downwards to form a protruding block, the adjusting piece is rotated, the protruding block moves along the step structure to force the adjusting piece to drive the valve bonnet to ascend and descend, and the plug blocks or opens the hollow channel along with ascending and descending of the valve bonnet. The cooker can be opened and closed by a single hand; by rotating the adjusting piece and matching the three-layer step-shaped structure with the protruding block, a triple-gear pressure adjusting function is achieved; and sealing pressurization or exhaust pressure relief can be carried out.

Description

Technical Field

[0001] This utility model relates to the field of kitchen cooking appliances, and in particular to a safe pressure cooker. Background Technology

[0002] Some pressure cookers on the market use a misaligned interlocking mechanism between the lid and the body, requiring both hands to open and close; others have overly complex structures that make them difficult for users to understand; still others have lids that are half-open, causing them to leak pressure; and some pressure cookers require disassembling valve components to adjust the pressure, which is cumbersome and poses a risk of burns, or have a single adjustment unit that cannot adapt to diverse cooking needs. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a safe pressure cooker.

[0004] This utility model is achieved through the following technical solution: a safe pressure cooker, including a lid and a body, wherein the lid includes a pressure cap, a panel disposed on the pressure cap, a fastening assembly, a working valve assembly for venting and regulating pressure, a knob assembly, a central stud, and a central nut; the panel has a first mounting groove and a second mounting groove, the first mounting groove having a stepped structure; the central stud passes through the knob assembly, the panel, and the pressure cap in sequence and is tightened with the central nut; the lower end of the knob assembly passes through the second mounting groove and is connected to the fastening assembly, the fastening assembly fastening or loosening the pressure cap and a set of opposite sides of the body as the knob assembly rotates; the working valve assembly includes a working valve core. The system comprises an adjusting component, a valve nut with a first vent hole, and a valve cap with a plug on its lower side that is driven to rise and fall by the adjusting component. The working valve core has a hollow channel that extends through its upper and lower sides. After passing through a first mounting groove and a pressure cover, the working valve core is tightened with the valve nut. The adjusting component is fitted around the outer periphery of the working valve core. The valve cap has a second vent hole that extends through its upper and lower sides. The hollow channel communicates with the inside of the pot through the first vent hole. The lower side of the adjusting component protrudes downward to form a protrusion block. When the adjusting component is rotated, the protrusion block moves along the stepped structure, forcing the adjusting component to drive the valve cap to rise and fall. The plug blocks or opens the hollow channel as the valve cap rises and falls. When the plug rises, the hollow channel communicates with the second vent hole.

[0005] When the plug of the rotating adjusting component blocks the hollow channel as the valve cap descends, the pressure cooker achieves pressure boosting or pressure holding. When the plug opens the hollow channel as the valve cap rises, the first vent, the hollow channel, and the second vent together form an venting channel, enabling the cooker to release pressure. The cooker's design, combining a knob assembly with a locking assembly, allows for easy locking and unlocking of the lid and body with a single hand. The adjustment component and stepped structure ensure precise control of the valve cap's lifting stroke, enabling multi-level pressure adjustment and rapid response of the venting channel.

[0006] The stepped structure includes a first step and a second step, with the distance between the second step and the bottom of the first mounting groove being greater than the distance between the first step and the bottom of the first mounting groove. A first inclined surface forming a transition structure is provided between the first step and the first mounting groove, and a second inclined surface forming a transition structure is provided between the first step and the second step. The stepped structure and the first mounting groove form a three-layer stepped structure with three adjustable levels. The two steps, two inclined surfaces, and the first mounting groove together form a three-layer stepped structure, enabling the stepped structure to have a triple-level pressure adjustment function. The three-layer stepped structure provides clear tactile feedback when the adjusting component rotates, allowing the user to accurately identify the current pressure level.

[0007] The stepped structure has three parts, evenly distributed along the same circumference of the first mounting groove; the protruding block has three parts, evenly distributed along the same circumference of the lower side of the adjusting member. The three stepped structures, together with the three evenly distributed protruding blocks, form a function to stabilize the valve cap's lifting and lowering, thus achieving stable pressure regulation. The cooperation between the stepped structures and the protruding blocks forms a three-point positioning mechanism, effectively dispersing stress during the adjustment process and avoiding component wear caused by single-point force.

[0008] The working valve assembly further includes a valve sleeve, a retaining ring, and a fastener; the lower section of the working valve core has a first annular protrusion protruding outwards, and the upper section of the working valve core protrudes outwards to form a valve post; the panel has a third mounting groove and a first mounting hole, the first mounting groove communicating with the first mounting hole through the third mounting groove and jointly penetrating the upper and lower sides of the panel, the lower section of the working valve core passing through the first mounting hole, and the first annular protrusion being embedded in the third mounting groove; the valve sleeve is fitted around the valve post and can slide along it, the lower inner side of the valve sleeve has a first annular groove, and the retaining ring sleeve... The retaining spring is positioned on the annular groove formed between the valve stem and the first annular protrusion, and is located within the first annular groove. The inner diameter of the hole in the retaining spring is smaller than the outer diameter of the valve stem. The fastener is a hollow cylindrical structure with a lower groove formed by an inward indentation at the lower part of its outer periphery and an upper groove formed by an outward indentation at the upper part of its inner wall. The fastener is sleeved on the outer periphery of the valve sleeve and clamped between the adjusting member and the valve sleeve. A second annular protrusion is provided on the inner side of the adjusting member, and the second annular protrusion is located within the lower groove. The lower part of the valve cap is sleeved on the outer periphery of the valve sleeve and is located within the upper groove. The retaining spring can limit the valve sleeve, creating resistance and preventing direct disengagement from the valve stem of the working valve core. The upper and lower grooves of the fastener can achieve a flexible connection with the adjusting member and the valve sleeve, allowing the adjusting member to transmit force to the valve cap through the valve sleeve, thereby realizing the raising and lowering of the valve cap.

[0009] The upper outer periphery of the valve sleeve is recessed inward to form a second annular groove. The lower inner side of the valve cap is provided with a retaining element, which is engaged within the second annular groove. The engaging structure between the second annular groove and the retaining element allows the valve cap and valve sleeve to be detachably connected, preventing the valve cap from falling off due to accidental contact.

[0010] The pressure cap has a first guide groove on its upper side; a pair of fastening components are symmetrically arranged, each pair of fastening components including a connector and a pressure ring, the pressure ring being disposed at the outer end of the connector, and a guide post being disposed at the inner end of the connector, the connector being installed in the first guide groove; a pair of second guide grooves symmetrically opened in the second mounting groove, passing through the upper and lower sides of the panel; a pair of third guide grooves are provided in the knob assembly, the guide post passing through the second guide groove and then embedding into the third guide groove; when the knob assembly is rotated, the third guide groove drives the guide post to slide along the second guide groove, the connector slides along the first guide groove, and the two pressure rings fasten or loosen the pressure cap and the pot body; the second guide groove is a straight guide groove, the length direction of the second guide groove is consistent with the length direction of the first guide groove, and the third guide groove gradually extends from the outside of the knob assembly to its inside to form an arc-shaped guide groove. When the knob assembly is rotated, the third guide groove forces the guide post to slide along the second guide groove, thereby causing the pressure rings to loosen or fasten the pressure cap and the pot body. The third guide groove is an arc-shaped guide groove. The structure of the arc-shaped guide groove forces the linear movement of the knob assembly into the radial displacement of the guide post, thereby driving the pressure ring to achieve the action of locking inward or releasing outward.

[0011] The knob assembly includes a cover lug, a decorative piece, and a spring post. The lower side of the cover lug has a positioning hole, and the upper side of the second mounting groove has an arc-shaped sliding groove with a rack. The spring post has a third annular protrusion protruding outwards from its outer circumference. The spring post is fitted into the positioning hole, and the upper side of the third annular protrusion abuts against the lower side of the cover lug. A steel ball located at the lower part of the spring post is situated within the arc-shaped sliding groove and slides along the rack. The decorative piece is detachably mounted on the upper side of the cover lug. The spring post and the rack of the arc-shaped sliding groove cooperate; when the cover lug rotates, the rolling of the steel ball produces a rolling sound, providing a tactile feedback and a prompting sound.

[0012] The positioning holes are provided in a pair symmetrically, the spring posts are provided in two, and the arc-shaped sliding grooves are provided in a pair symmetrically.

[0013] It also includes a safety valve assembly, which comprises a safety valve core, a lower safety valve component, a retaining ring, an upper safety valve component, a safety valve spring, and a safety valve sealing ring. The upper safety valve component has an internal cavity with a third vent hole at its top connecting the external environment of the pot to the cavity. A fourth annular protrusion is formed by an outward bulge at its lower periphery. The lower safety valve component is an upward-opening cylindrical structure with a fourth vent hole at its bottom. A third annular groove is formed on the lower periphery of the lower safety valve component, and the retaining ring is fitted within this groove. The safety valve core has a fifth annular protrusion formed by an outward bulge at its center. A fourth annular groove is formed by an inward recess at the lower section of the safety valve core, and the safety valve sealing ring is fitted within this groove. The diameter of the safety valve sealing ring is larger than the fifth annular protrusion. The safety valve assembly has four vent holes; a second mounting hole is provided on the pressure cap; the lower safety valve component passes through the second mounting hole from bottom to top and is screwed together with the lower end of the upper safety valve component via a threaded connection; the safety valve spring and safety valve core are located in the cavity formed by the lower safety valve component and the upper safety valve component; the upper end of the safety valve spring abuts against the inner wall of the upper safety valve component, and its lower end is fitted around the outer circumference of the upper section of the safety valve core and abuts against the fifth annular protrusion, causing the safety valve sealing ring to close or open the fourth vent hole; a third mounting hole is provided on the panel, and the top of the upper safety valve component is located in the third mounting hole and can slide up and down along it; the diameter of the retaining ring is larger than the diameter of the second mounting hole, and the diameter of the fourth annular protrusion is larger than the diameter of the second mounting hole. The safety valve assembly is designed to assist the cookware in venting. The cooperation between the retaining ring and the fourth annular protrusion allows the safety valve assembly to move up and down only within the range between the two. When the pressure inside the pot is lower than the set value, the safety valve spring pushes the safety valve core downward, and the safety valve sealing ring seals the fourth vent hole, thereby realizing the pressure boosting or pressure holding function; when the pressure inside the pot exceeds the set value, the entire safety valve assembly will rise and push up the safety valve core, the safety valve sealing ring will open the fourth vent hole, and the gas inside the pot will enter the cavity formed by the lower and upper parts of the safety valve from the fourth vent hole, then enter the cavity of the upper part of the safety valve, and finally be discharged from the pot from the third vent hole.

[0014] The adjusting component has a lever on its side wall. The first mounting groove extends upward to form a positioning cylinder, which has a positioning groove. The lever is embedded in the positioning groove and can slide along it. The lever facilitates the operator's rotation of the adjusting component; the positioning groove restricts the range of motion of the lever.

[0015] Compared with the prior art, the advantages of this utility model are as follows: the lid can be fastened or loosened by rotating the knob assembly, and the opening and closing operation can be completed with one hand; by rotating the adjustment component, the valve cap can be raised and lowered through the cooperation of the three-layer stepped structure and the protrusion block to achieve the three-level pressure adjustment function; it can perform sealing pressurization or venting and depressurization to meet various cooking needs. Attached Figure Description

[0016] Figure 1 This is an exploded view of the structure of an embodiment of the present utility model;

[0017] Figure 2 This is a top view of an embodiment of the present utility model;

[0018] Figure 3 This is a partial sectional view taken along the longitudinal direction of an embodiment of the present invention;

[0019] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle;

[0020] Figure 5 for Figure 3 A magnified view of a portion of point B in the middle;

[0021] Figure 6 for Figure 3 A magnified view of a portion of point C in the middle;

[0022] Figure 7 This is a longitudinal sectional view of the pot lid according to an embodiment of the present invention;

[0023] Figure 8 This is a longitudinal sectional view of the pot lid of this utility model embodiment after the lid lugs have been removed;

[0024] Figure 9 This is a top view of the adjusting component in the zero position according to an embodiment of the present invention;

[0025] Figure 10 This is a cross-sectional view of the pot lid portion when the adjusting component is in the zero position and the lever is longitudinally cut open;

[0026] Figure 11 This is a cross-sectional view of the pot lid portion after most of the working valve assembly structure has been removed when the adjusting component is in the zero position and the lever is longitudinally cut open.

[0027] Figure 12 This is a top view of the adjusting component in the first position according to an embodiment of the present invention;

[0028] Figure 13 This is a cross-sectional view of the pot lid portion when the adjusting component is longitudinally cut open along the first retaining block according to an embodiment of the present utility model.

[0029] Figure 14 This is a cross-sectional view of the pot lid portion after removing most of the working valve assembly structure when the adjusting component is longitudinally cut open at the first stop block according to an embodiment of the present utility model.

[0030] Figure 15 This is a top view of the adjusting component in the second position according to an embodiment of the present invention;

[0031] Figure 16 This is a cross-sectional view of the pot lid portion when the adjusting component is in the second position and the lever is longitudinally cut open;

[0032] Figure 17 This is a cross-sectional view of the pot lid portion after most of the working valve assembly structure has been removed when the adjusting component is in the second position and the lever block is longitudinally cut open.

[0033] Figure 18 This is a schematic diagram of the knob assembly from the lower side in an embodiment of the present invention;

[0034] Figure 19 This is a cross-sectional view of the knob assembly in an embodiment of the present invention, taken along the longitudinal direction.

[0035] Figure 20 This is a top view of the cover of an embodiment of the present utility model;

[0036] Figure 21 This is a perspective view of the ear cover according to an embodiment of the present utility model;

[0037] Figure 22 This is a top view of the panel in an embodiment of the present invention;

[0038] Figure 23 This is a perspective view of the panel from the upper side of an embodiment of the present invention;

[0039] Figure 24 This is a perspective view of the panel from the lower side of an embodiment of the present invention;

[0040] Figure 25 This is an exploded view of the working valve assembly in an embodiment of the present invention;

[0041] Figure 26 This is a longitudinal section anatomical view of the working valve assembly according to an embodiment of the present invention.

[0042] Figure 27 This is an exploded view of the safety valve assembly according to an embodiment of the present invention;

[0043] Figure 28 This is a longitudinal sectional view of the safety valve assembly according to an embodiment of the present invention.

[0044] The following are the meanings of the reference numerals in the figure: 1. Pressure cap; 11. First guide groove; 12. Second mounting hole; 2. Panel; 21. First mounting groove; 211. Positioning cylinder; 212. Positioning groove; 22. Stepped structure; 221. First step; 222. Second step; 223. First inclined surface; 224. Second inclined surface; 23. Third mounting groove; 24. First mounting hole; 25. Third mounting hole; 26. Second mounting groove; 261. Second guide groove; 262. Arc-shaped slide groove; 31. Pressure ring; 32. Connector; 33. Guide post; 4. Working valve assembly; 41. Working valve core; 411. First annular protrusion; 412. Valve column; 42. Adjusting component; 421. Protrusion block; 422. Second annular protrusion; 423. Toggle block; 43. Valve nut; 431. First vent hole; 44. Valve cap; 441. Plug ; 442, Second vent; 443, Clip; 45, Valve sleeve; 451, First annular groove; 452, Second annular groove; 46, Snap ring; 47, Fastener; 471, Lower groove; 472, Upper groove; 5, Knob assembly; 51, Cover lug; 511, Third guide groove; 512, Positioning hole; 52, Decorative piece; 53, Spring post; 531, Third annular protrusion; 54, Center stud; 55, Center 6. Nut; 6. Safety valve assembly; 61. Safety valve core; 611. Fifth annular protrusion; 612. Fourth annular groove; 62. Lower safety valve component; 621. Fourth vent hole; 622. Third annular groove; 63. Snap ring; 64. Upper safety valve component; 641. Third vent hole; 642. Fourth annular protrusion; 65. Safety valve spring; 66. Safety valve sealing ring; 71. Ear seat; 72. Protective ring; 73. Side ear. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0046] Example

[0047] See Figures 1 to 28A safety pressure cooker includes a lid and a body. The lid includes a pressure cap 1, a panel 2 mounted on the pressure cap 1, a fastening assembly, a working valve assembly 4 for venting and regulating pressure, a knob assembly 5, a central stud 54, and a central nut 55. The panel 2 has a first mounting groove 21 and a second mounting groove 26. The first mounting groove 21 has a stepped structure 22. The central stud 54 passes through the knob assembly 5, the panel 2, and the pressure cap 1 in sequence and is tightened with the central nut 55. The lower end of the knob assembly 5 passes through the second mounting groove 26 and is connected to the fastening assembly. The fastening assembly tightens or loosens a pair of opposite sides of the pressure cap 1 and the body as the knob assembly 5 rotates. The working valve assembly 4 includes a working valve core 41, an adjusting element 42, and a valve nut with a first vent 431. 43. A valve cap 44 with a plug 441 on the lower side and driven to rise and fall by an adjusting member 42; a working valve core 41 has a hollow channel that passes through its upper and lower sides, and the working valve core 41 passes through the first mounting groove 21 and the pressure cover 1 and is tightened with the air valve nut 43. The adjusting member 42 is sleeved on the outer periphery of the working valve core 41; the valve cap 44 has a second exhaust hole 442 that passes through its upper and lower sides, and the hollow channel is connected to the inside of the pot through the first exhaust hole 431; the lower side of the adjusting member 42 protrudes downward to form a protrusion block 421. When the adjusting member 42 is rotated, the protrusion block 421 moves along the stepped structure 22, forcing the adjusting member 42 to drive the valve cap 44 to rise and fall. The plug 441 blocks or opens the hollow channel as the valve cap 44 rises and falls. When the plug 441 rises, the hollow channel is connected to the second exhaust hole 442.

[0048] When the rotating adjusting component 42 and the plug 441 block the hollow channel as the valve cap 44 descends, the pressure cooker achieves pressure boosting or pressure holding functions. When the plug 441 opens the hollow channel as the valve cap 44 rises, the first vent 431, the hollow channel, and the second vent 442 together form an venting channel, enabling the cooker to release pressure. Through the linkage design of the knob assembly 5 and the fastening assembly, this cooker allows for locking or unlocking of the lid and body with a single-handed rotation, and opening and closing operations can be completed with one hand. The cooperation between the adjusting component 42 and the stepped structure 22 makes the lifting stroke of the valve cap 44 precisely controllable, achieving multi-level pressure adjustment and rapid response of the venting channel.

[0049] The stepped structure 22 includes a first step 221 and a second step 222. The distance between the second step 222 and the bottom of the first mounting groove 21 is greater than the distance between the first step 221 and the bottom of the first mounting groove 21. A first inclined surface 223 forming a transition structure is provided between the first step 221 and the first mounting groove 21, and a second inclined surface 224 forming a transition structure is provided between the first step 221 and the second step 222. The stepped structure 22 and the first mounting groove 21 form a three-layer stepped structure with three adjustable levels. The two steps, the two inclined surfaces, and the first mounting groove 21 together form a three-layer stepped structure, giving the stepped structure 22 a triple-level pressure adjustment function. The three-layer stepped structure provides clear tactile feedback when the adjusting component 42 rotates, allowing the user to accurately identify the current pressure level. In this embodiment, when the adjusting member 42 rotates clockwise, the first inclined surface 223 is in the forward direction and the second inclined surface 224 is in the rear direction. The first inclined surface 223 first meets the protrusion 421. A third inclined surface can also be provided between the first inclined surface 223 and the first step 221, which is inclined downward from the first inclined surface 223 towards the first step 221. The setting of the third inclined surface can prevent the protrusion 421 from automatically rebounding or falling back to the initial state.

[0050] Three stepped structures 22 are provided, evenly distributed along the same circumference of the first mounting groove 21; three protrusions 421 are provided, evenly distributed along the same circumference of the lower side of the adjusting member 42. The three stepped structures 22, together with the three evenly distributed protrusions 421, form a function to stabilize the adjustment member 42 in regulating the valve cap 44, thereby achieving stable pressure regulation. The cooperation between the stepped structures 22 and the protrusions 421 forms a three-point positioning mechanism, effectively dispersing stress during the adjustment process and avoiding component wear caused by single-point force.

[0051] The working valve assembly 4 also includes a valve sleeve 45, a retaining ring 46, and a fastener 47; the lower section of the working valve core 41 has a first annular protrusion 411 protruding outward, and the upper section of the working valve core 41 has a valve column 412 protruding outward; the panel 2 is provided with a third mounting groove 23 and a first mounting hole 24, the first mounting groove 21 communicates with the first mounting hole 24 through the third mounting groove 23 and together they pass through the upper and lower sides of the panel 2, the lower section of the working valve core 41 passes through the first mounting hole 24, and the first annular protrusion 411 is embedded in the third mounting groove 23; the valve sleeve 45 is sleeved on the outer periphery of the valve column 412 and can slide along it, the lower inner side of the valve sleeve 45 is provided with a first annular groove 451, and the retaining ring... The retaining ring 46 is fitted onto the annular groove formed between the valve stem 412 and the first annular protrusion 411 and is located within the first annular groove 451. The inner diameter of the hole in the retaining ring 46 is smaller than the outer diameter of the valve stem 412. The fastener 47 is a hollow cylindrical structure with a lower groove 471 formed by an inward indentation at the lower part of its outer periphery and an upper groove 472 formed by an outward indentation at the upper part of its inner wall. The fastener 47 is fitted onto the outer periphery of the valve sleeve 45 and is clamped between the adjusting member 42 and the valve sleeve 45. A second annular protrusion 422 is provided on the inner side of the adjusting member 42, and the second annular protrusion 422 is located within the lower groove 471. The lower part of the valve cap 44 is fitted onto the outer periphery of the valve sleeve 45 and is located within the upper groove 472. The retaining ring 46 can limit the valve sleeve 45, forming resistance and preventing it from directly disengaging from the valve stem 412 of the working valve core 41. The upper groove 472 and lower groove 471 of the fastener 47 enable flexible connection with the adjusting member 42 and the valve sleeve 45, allowing the adjusting member 42 to transmit force to the valve cap 44 through the valve sleeve 45, thereby realizing the raising and lowering of the valve cap 44.

[0052] The upper outer periphery of the valve sleeve 45 is recessed inward to form a second annular groove 452. The lower inner side of the valve cap 44 is provided with a retaining element 443, which is engaged in the second annular groove 452. The engaging structure between the second annular groove 452 and the retaining element 443 makes the valve cap 44 and the valve sleeve 45 detachably connected, preventing the valve cap 44 from falling off due to accidental contact.

[0053] The pressure cover 1 has a first guide groove 11 on its upper side; a pair of fastening components are symmetrically arranged, each pair of fastening components including a connector 32 and a pressure ring 31, the pressure ring 31 is located at the outer end of the connector 32, and a guide post 33 is provided at the inner end of the connector 32, the connector 32 is installed in the first guide groove 11; a pair of second guide grooves 261 symmetrically opened in the second mounting groove 26, which pass through the upper and lower sides of the panel 2; a pair of third guide grooves 511 are provided in the knob assembly 5, and the guide post 33 passes through the second guide groove 261 and is embedded in the third guide groove 511. When the knob assembly 5 rotates, the third guide groove 511 drives the guide post 33 to slide along the second guide groove 261, and the connector 32 slides along the first guide groove 11. The two pressure rings 31 fasten or loosen the pressure cap 1 and the pot body. The second guide groove 261 is a straight guide groove, and the length direction of the second guide groove 261 is consistent with the length direction of the first guide groove 11. The third guide groove 511 gradually extends from the outside of the knob assembly 5 to its inside to form an arc-shaped guide groove. The arc-shaped guide groove extends from the outer edge of the knob assembly 5 to the center in an involute pattern. In this embodiment, the third guide groove 511 is formed on the lid lug 51. When the knob assembly 5 rotates, the third guide groove 511 forces the guide post 33 to slide along the second guide groove 261, thereby causing the pressure rings 31 to loosen or fasten the pressure cap 1 and the pot body. The third guide groove 511 is an arc-shaped guide groove. This arc-shaped guide groove structure forces the linear movement of the knob assembly 5 into the radial displacement of the guide post 33, thereby causing the pressure ring 31 to engage inwards or disengage outwards. In this embodiment, the pressure ring 31 has a U-shaped groove with an arc shape at one end. It is a mature, existing accessory and a commercially available product, so no specific structural analysis is required.

[0054] The knob assembly 5 includes a cover lug 51, a decorative piece 52, and a spring post 53. The lower side of the cover lug 51 has a positioning hole 512, and the upper side of the second mounting groove 26 has an arc-shaped sliding groove 262 with a rack. A third annular protrusion 531 protrudes outward from the outer circumference of the spring post 53. The spring post 53 is fitted into the positioning hole 512, and the upper side of the third annular protrusion 531 abuts against the lower side of the cover lug 51. A steel ball located at the lower part of the spring post 53 is located within the arc-shaped sliding groove 262 and slides along the rack. The decorative piece 52 is detachably mounted on the upper side of the cover lug 51. The spring post 53 cooperates with the rack of the arc-shaped sliding groove 262. When the cover lug 51 rotates, the rolling of the steel ball produces a rolling sound, providing a tactile feedback and a prompting sound. In this embodiment, a circular hole is provided at both ends and in the middle of the arc-shaped slide groove 262. When the steel ball of the spring column 53 slides, it is placed in the circular hole. The circular holes at both ends can indicate that the rotation has reached the limit position, and the circular hole in the middle provides a tactile feedback to indicate to the operator that the cover 51 is rotating.

[0055] A pair of positioning holes 512 are provided symmetrically, two spring posts 53 are provided, and a pair of arc-shaped sliding grooves 262 are provided symmetrically.

[0056] It also includes a safety valve assembly 6, which includes a safety valve core 61, a lower safety valve component 62, a retaining ring 63, an upper safety valve component 64, a safety valve spring 65, and a safety valve sealing ring 66. The upper safety valve component 64 has an internal cavity, and its top has a third vent hole 641 that connects the external environment of the pot to the cavity. Its lower outer periphery protrudes outward to form a fourth annular protrusion 642. The lower safety valve component 62 is an upward-opening cylindrical structure with a fourth vent hole 621 on its bottom surface. A third annular groove 622 is formed on the lower outer periphery of the lower safety valve component 62, and the retaining ring 63 is fitted inside the third annular groove 622. The middle outer periphery of the safety valve core 61 protrudes outward to form a fifth annular protrusion 611. The lower section of the safety valve core 61 is recessed inward to form a fourth annular groove 612, and the safety valve sealing ring 66 is fitted inside the fourth annular groove 612. The diameter of the sealing ring 66 is larger than the diameter of the fourth vent hole 621; a second mounting hole 12 is provided on the pressure cover 1; the lower safety valve part 62 passes through the second mounting hole 12 from bottom to top and is screwed together with the lower end of the upper safety valve part 64 by a threaded connection; the safety valve spring 65 and the safety valve core 61 are located in the cavity formed by the lower safety valve part 62 and the upper safety valve part 64, the upper end of the safety valve spring 65 abuts against the inner wall of the upper safety valve part 64, and its lower end is sleeved on the outer circumference of the upper section of the safety valve core 61 and abuts against the fifth annular protrusion 611, causing the safety valve sealing ring 66 to close or open the fourth vent hole 621; a third mounting hole 25 is provided on the panel 2, the top of the upper safety valve part 64 is located in the third mounting hole 25 and can slide up and down along it; the diameter of the retaining ring 63 is larger than the diameter of the second mounting hole 12, and the diameter of the fourth annular protrusion 642 is larger than the diameter of the second mounting hole 12. The safety valve assembly 6 is provided to assist the cookware in venting. The engagement of the retaining ring 63 and the fourth annular protrusion 642 allows the safety valve assembly 6 to move up and down only within the range between them. When the pressure inside the pot is lower than the set value, the safety valve spring 65 pushes the safety valve core 61 downward, and the safety valve sealing ring 66 seals the fourth vent hole 621, thereby achieving the function of pressurization or pressure maintenance. When the pressure inside the pot exceeds the set value, the entire safety valve assembly 6 will rise and push up the safety valve core 61. The safety valve sealing ring 66 will open the fourth vent hole 621, and the gas inside the pot will enter the cavity formed by the lower safety valve part 62 and the upper safety valve part 64 from the fourth vent hole 621, then enter the cavity of the upper safety valve part 64, and finally be discharged from the pot from the third vent hole 641. In this embodiment, the lower part of the safety valve 62 has a vent hole on its side wall that penetrates its inner and outer walls. When the gas pressure inside the pot is less than the set value (5KPa), the gas inside the pot can enter the cavity between the lower part of the safety valve 62 and the upper part of the safety valve 64 through the vent hole, and then be discharged outside the pot through the third vent hole 641.

[0057] The adjusting component 42 has a lever 423 on its side wall. The first mounting groove 21 extends upward to form a positioning cylinder 211. The positioning cylinder 211 has a positioning groove 212. The lever 423 is embedded in the positioning groove 212 and can slide along it. The lever 423 is designed to facilitate the operator to rotate the adjusting component 42. The positioning groove 212 restricts the range of motion of the lever 423.

[0058] In this embodiment, when the working valve assembly 4, safety valve assembly 6, etc. are installed on the pressure cover 1 and panel 2, corresponding mounting holes will be opened. These mounting holes are opened according to actual needs, so they do not need to be described one by one in the structure of this application.

[0059] Installation in this embodiment:

[0060] 【1】Installation of knob assembly 5:

[0061] 1) Place the two spring pins 53 below the cover lug 51 and insert the spring pins 53 from bottom to top into the positioning holes 512 set in the cover lug 51;

[0062] 2) Place the cover lug 51 above the center of the panel 2, and insert the cover lug 51 into the first mounting slot 21 set on the panel 2 from top to bottom;

[0063] 3) Place the center stud 54 above the center of the cover lug 51, and insert the center stud 54 into the mounting hole set in the cover lug 51 from top to bottom;

[0064] 4) Place the decorative piece 52 above the cover ear 51, align the barbs on the decorative piece 52 with the buckles around the cover ear 51, and fasten the decorative piece 52 onto the cover ear 51 from top to bottom.

[0065] 【2】Installation of safety valve assembly 6:

[0066] 5) Place the safety valve sealing ring 66 below the safety valve core 61, and thread the safety valve sealing ring 66 through the safety valve core 61 from bottom to top into the set installation position (fourth annular groove 612).

[0067] 6) Place the retaining ring 63 below the lower part of the safety valve 62 and snap the retaining ring 63 into the groove (third annular groove 622) set in the lower part of the safety valve 62 from bottom to top;

[0068] 7) Place the safety valve core 61 from top to bottom into the lower part of the safety valve 62, so that it is stuck inside the lower part of the safety valve 62 and does not fall out;

[0069] 8) Place the safety valve spring 65 above the safety valve core 61 and press the spring against the safety valve core 61;

[0070] 9) Place the lower safety valve part 62 under the pot lid, insert the lower safety valve part 62 into the second mounting hole 12 set on the pot lid from bottom to top, and then place the upper safety valve part 64 above the lower safety valve part 62 and connect it to the lower safety valve part 62 by thread, so that the pot lid is stuck between the upper safety valve part 64 and the lower safety valve part 62.

[0071] 【3】Assembly of the pot lid assembly:

[0072] 10) Place the pressure ring 31 on the left and right sides of the pressure cover 1, and press the pressure ring 31 against the pressure cover 1 from the outside to the inside;

[0073] 11) Place the lid lug 51 assembly on top of the pot lid, and align the central stud 54 of the lid lug 51 assembly with the central hole set in the pot lid and the safety valve vent (third mounting hole 25) set in the panel 2 with the upper part 64 of the safety valve. Fasten the lid lug 51 assembly on top of the pot lid from top to bottom, and at the same time, allow the guide post 33 set in the pressure ring 31 to pass through the second guide groove 261 set in the panel 2 and the third guide groove 511 set in the lid lug 51, and lock the lid lug 51 assembly to the pot lid by the central nut 55.

[0074] 【4】Installation of working valve assembly 4:

[0075] 12) Place the snap ring 46 below the valve sleeve 45 and insert the snap ring 46 into the first annular groove 451 inside the valve sleeve 45 from bottom to top;

[0076] 13) Insert the working valve core 41 into the valve sleeve 45 from bottom to top;

[0077] 14) Place the fastener 47 above the valve sleeve 45 and put the fastener 47 on the valve sleeve 45 from top to bottom;

[0078] 15) Place the valve cap 44 on top of the valve sleeve 45, and align the buckle (clamp 443) of the valve cap 44 with the buckle (second annular groove 452) of the valve sleeve 45, and fasten the valve cap 44 onto the valve sleeve 45 from top to bottom.

[0079] 16) Place the adjusting member 42 above the panel 2 and insert the adjusting member 42 into the first mounting slot 21 set on the panel 2 from top to bottom;

[0080] 17) Pass the working valve core 41 from top to bottom through the working valve mounting hole (first mounting hole 24, third mounting groove 23) and pressure cover 1 set in the panel 2, so that the adjusting part 42 is stuck between the panel 2 and the valve cap 44, and then use the air valve nut 43 to lock the working valve assembly 4 and the pressure cover 1; complete the assembly of the pot body cover.

[0081] 【5】Installation of Side Ear 73 Components:

[0082] 18) Weld the ear seat 71 to the designated position on the pot body;

[0083] 19) Place the protective ring 72 on one side of the side ear 73, and then put the protective ring 72 on the designated position of the side ear 73;

[0084] 20) Place the side ear 73 on one side of the ear seat 71, and align the through hole of the side ear 73 with the threaded hole of the ear seat 71, and then use screws to lock the side ear 73 and the ear seat 71 together.

[0085] 21) Place the assembled lid on top of the pot body, and then put the lid on the pot body from top to bottom to complete the assembly of the pressure cooker.

[0086] Working principle of this embodiment

[0087] 1) Adjustment principle of working valve assembly 4:

[0088] The adjusting component 42 has three positions: zero, first, and second. Zero corresponds to the protrusion 421 being located on the second step 222, first corresponds to the protrusion 421 being located on the first step 221, and second corresponds to the protrusion 421 being located on the bottom of the first mounting groove 21.

[0089] Rotating the adjusting component 42, when it reaches the zero position, the highest section (second step 222) of the three-stage stepped structure 22 on the panel 2 contacts the protrusion 421 of the adjusting component 42. At this time, the adjusting component 42 pushes the valve cap 44 to its highest position, and the exhaust passage between the valve cap 44 and the working valve core 41 is fully opened, allowing the gas inside the pot to be discharged outward through the working valve core 41 and then through the valve cap 44 to reduce pressure. When the adjusting component 42 is rotated counterclockwise to the first position (first step 221), the middle section of the three-stage stepped structure 22 on the panel 2 contacts the protrusion 421 of the adjusting component 42. At this time, the height of the valve cap 44 will be at a medium level, and the valve cap 44 and the working valve core 41 will be in contact. The exhaust passage between the cores 41 becomes smaller, obstructing the outward discharge of gas from the pot and increasing the pressure inside the pot. When the adjusting component 42 is turned to the second position (the bottom of the first mounting groove 21), the lowest end of the three-stage stepped structure 22 set on the panel 2 contacts the protrusion 421 of the adjusting component 42. At this time, the height of the valve cap 44 is reduced to the lowest point, and the exhaust passage of the working valve core 41 is blocked by the lowered valve cap 44, forming a sealed state inside the pot, and the pressure inside the pot can reach the maximum upper limit (120KPa). When the pressure inside the pot exceeds the maximum upper limit (above 120KPa), the gas pushes up the lowered valve cap 44, the exhaust passage is opened, and the gas is discharged outward to reduce the pressure, so that the pressure inside the pot remains constant.

[0090] 2) Working principle of safety valve assembly 6:

[0091] When there is no pressure inside the pot, the safety valve assembly 6 is in the lowered state. When the pressure inside the pot reaches the set value (5 kPa), the gas inside the pot will push the safety valve assembly 6 up. When the pressure inside the pot exceeds the set value (168 kPa to 240 kPa), the pressure will push the safety valve core 61 of the assembly up, and the exhaust channel between the upper part 64 and the lower part 62 of the safety valve will be opened, and the gas inside the pot will be discharged outward through the channel.

[0092] 3) The principle of opening and closing the pressure cooker lid:

[0093] When the pressure cap 1 is in the open state, rotating the cap ear 51 counterclockwise causes the centrally symmetrical third guide groove 511 of the cap ear 51 to drive the guide post 33 of the pressure ring 31 to converge towards the center. Since the guide post 33 passes through the second guide groove 261 of the panel 2, the connector 32 can only converge in a straight line inward. When the cap ear 51 rotates to its limit position and can no longer rotate, the pressure ring 31 is tightened inward to its tightest state. At this time, the pressure ring 31 has locked the pot body, and the pressure cap 1 is in a locked state. Rotating the cap ear 51 clockwise causes the centrally symmetrical third guide groove 511 of the cap ear 51 to drive the guide post 33 of the pressure ring 31 to push outward from the center. When the cap ear 51 rotates to its limit position and can no longer rotate, the pressure ring 31 is pushed outward to the open state. At this time, the pressure ring 31 can no longer hold the pot body, and the pot lid can be separated from the pot body by lifting it upward.

[0094] The above detailed description is a specific description of a feasible embodiment of the present utility model. This embodiment is not intended to limit the patent scope of the present utility model. All equivalent implementations or modifications that do not depart from the present utility model should be included in the patent scope of this case.

Claims

1. A safe pressure cooker, comprising a lid and a body, characterized in that: The pot lid includes a pressure cap, a panel mounted on the pressure cap, a fastening assembly, a working valve assembly for venting and regulating pressure, a knob assembly, a central stud, and a central nut. The panel has a first mounting groove and a second mounting groove, with a stepped structure in the first mounting groove. The central stud passes through the knob assembly, the panel, and the pressure cap in sequence before being tightened with the central nut. The lower end of the knob assembly passes through the second mounting groove and is connected to the fastening assembly. The fastening assembly, as the knob assembly rotates, fastens or loosens a pair of opposite sides of the pressure cap and the pot body. The working valve assembly includes a working valve core, an adjusting component, and a valve nut with a first vent hole. A valve cap with a plug on its lower side and driven to rise and fall by an adjusting component; the working valve core has a hollow channel that runs through its upper and lower sides, and after passing through the first mounting groove and pressure cover, the working valve core is tightened with the air valve nut; the adjusting component is sleeved on the outer periphery of the working valve core; the valve cap has a second vent hole that runs through its upper and lower sides, and the hollow channel is connected to the inside of the pot through the first vent hole; the lower side of the adjusting component protrudes downward to form a protrusion block, and rotating the adjusting component causes the protrusion block to move along the stepped structure, thereby forcing the adjusting component to drive the valve cap to rise and fall, and the plug blocks or opens the hollow channel as the valve cap rises and falls, and when the plug rises, the hollow channel is connected to the second vent hole.

2. The safety pressure cooker according to claim 1, characterized in that: The stepped structure includes a first step and a second step, the distance between the second step and the bottom of the first mounting groove is greater than the distance between the first step and the bottom of the first mounting groove; a first inclined surface forming a transition structure is provided between the first step and the first mounting groove, and a second inclined surface forming a transition structure is provided between the first step and the second step; the stepped structure and the first mounting groove form a three-layer stepped structure with three adjustable levels.

3. The safety pressure cooker according to claim 1, characterized in that: The stepped structure has three parts, which are evenly distributed along the same circumference of the first mounting groove; the protruding block has three parts, which are evenly distributed along the same circumference of the lower side of the adjusting member.

4. The safety pressure cooker according to claim 1, characterized in that: The working valve assembly further includes a valve sleeve, a retaining ring, and a fastener; the lower section of the working valve core has a first annular protrusion protruding outwards, and the upper section of the working valve core protrudes outwards to form a valve post; the panel has a third mounting groove and a first mounting hole, the first mounting groove communicating with the first mounting hole through the third mounting groove and jointly penetrating the upper and lower sides of the panel, the lower section of the working valve core passing through the first mounting hole, and the first annular protrusion being embedded in the third mounting groove; the valve sleeve is fitted around the valve post and can slide along it, the lower inner side of the valve sleeve has a first annular groove, and the retaining ring sleeve... The retaining spring is located on the annular groove formed between the valve stem and the first annular protrusion and within the first annular groove. The inner diameter of the hole of the retaining spring is smaller than the outer diameter of the valve stem. The fastener is a hollow cylindrical structure with a lower groove formed by an inward indentation at the lower part of its outer periphery and an upper groove formed by an outward indentation at the upper part of its inner wall. The fastener is sleeved on the outer periphery of the valve sleeve and clamped between the adjusting member and the valve sleeve. A second annular protrusion is provided on the inner side of the adjusting member, and the second annular protrusion is located within the lower groove. The lower part of the valve cap is sleeved on the outer periphery of the valve sleeve and located within the upper groove.

5. The safety pressure cooker according to claim 4, characterized in that: The upper outer periphery of the valve sleeve is recessed inward to form a second annular groove, and the lower inner side of the valve cap is provided with a retaining element, which is engaged in the second annular groove.

6. The safety pressure cooker according to claim 1, characterized in that: The pressure cap has a first guide groove on its upper side; a pair of fastening components are symmetrically arranged, each pair of fastening components includes a connector and a pressure ring, the pressure ring is located at the outer end of the connector, the inner end of the connector is provided with a guide post, and the connector is installed in the first guide groove; a pair of second guide grooves are symmetrically opened in the second mounting groove, which penetrate the upper and lower sides of the panel; a pair of third guide grooves are provided in the knob assembly, and the guide post passes through the second guide groove and is embedded in the third guide groove; when the knob assembly is rotated, the third guide groove drives the guide post to slide along the second guide groove, the connector slides along the first guide groove, and the two pressure rings fasten or loosen the pressure cap and the pot body; the second guide groove is a straight guide groove, the length direction of the second guide groove is consistent with the length direction of the first guide groove, and the third guide groove gradually extends from the outside of the knob assembly to its inside to form an arc-shaped guide groove.

7. The safe pressure cooker according to claim 1, characterized in that: The knob assembly includes a cover lug, a decorative piece, and a spring post; the lower side of the cover lug has a positioning hole, and the upper side of the second mounting groove has an arc-shaped sliding groove with a rack; the outer periphery of the spring post has a third annular protrusion, the spring post is fitted into the positioning hole, the upper side of the third annular protrusion abuts against the lower side of the cover lug, and a steel ball at the lower part of the spring post is located in the arc-shaped sliding groove and slides along the rack; the decorative piece is detachably installed on the upper side of the cover lug.

8. The safety pressure cooker according to claim 7, characterized in that: The positioning holes are provided in a pair symmetrically, the spring posts are provided in two, and the arc-shaped sliding grooves are provided in a pair symmetrically.

9. The safety pressure cooker according to claim 1, characterized in that: It also includes a safety valve assembly, which comprises a safety valve core, a lower safety valve component, a retaining ring, an upper safety valve component, a safety valve spring, and a safety valve sealing ring. The upper safety valve component has an internal cavity with a third vent hole at its top connecting the external environment of the pot to the cavity. A fourth annular protrusion is formed by an outward bulge at its lower periphery. The lower safety valve component is an upward-opening cylindrical structure with a fourth vent hole at its bottom. A third annular groove is formed on the lower periphery of the lower safety valve component, and the retaining ring is fitted within this groove. The safety valve core has a fifth annular protrusion formed by an outward bulge at its center. A fourth annular groove is formed by an inward recess at the lower section of the safety valve core, and the safety valve sealing ring is fitted within this groove. The diameter of the safety valve sealing ring is larger than the fifth annular protrusion. The pressure cap has a second mounting hole; the lower safety valve part passes through the second mounting hole from bottom to top and is screwed together with the lower end of the upper safety valve part by a threaded connection; the safety valve spring and safety valve core are located in the cavity formed by the lower safety valve part and the upper safety valve part, the upper end of the safety valve spring abuts against the inner wall of the upper safety valve part, and its lower end is sleeved on the outer circumference of the upper section of the safety valve core and abuts against the fifth annular protrusion, causing the safety valve sealing ring to close or open the fourth vent hole; the panel has a third mounting hole, the top of the upper safety valve part is located in the third mounting hole and can slide up and down along it; the diameter of the retaining ring is larger than the diameter of the second mounting hole, and the diameter of the fourth annular protrusion is larger than the diameter of the second mounting hole.

10. The safety pressure cooker according to claim 1, characterized in that: The side wall of the adjusting component is provided with a lever, the first mounting groove extends upward to form a positioning cylinder, the positioning cylinder has a positioning groove, and the lever is embedded in the positioning groove and can slide along it.

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