Safe pressure cooker

Abstract

The safety pressure cooker 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 rotary 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] The present invention relates to the technical field of kitchen cooking utensils, in particular to a safety pressure cooker. Background Art

[0002] Among the pressure cookers on the market, some use the staggered interlocking between the lid and the pot body, requiring two hands to complete the opening and closing operation; some pressure cookers are too complicated in structure, making it difficult for users to understand their application; and some pressure cookers are prone to users leaving the lid and the pot body in a half-open state, causing the lid and the pot body to not be able to buckle together, resulting in pressure leakage in the pot; when the stewing pressure needs to be adjusted, some pots require the valve body to be disassembled, which is cumbersome and poses a risk of scalding, or the adjustment unit is single and cannot adapt to diverse cooking needs. Summary of the Invention

[0003] The object of the present invention is to overcome the above-mentioned deficiencies in the prior art and provide a safe pressure cooker.

[0004] The present invention is achieved through the following technical solutions: a safety pressure cooker, comprising a pot cover and a pot body, the pot cover comprising a pressure cover, a panel arranged on the pressure cover, a buckling assembly, a working valve assembly for exhausting and adjusting pressure, a knob assembly, a central stud and a central nut; the panel is provided with a first mounting groove and a second mounting groove, the first mounting groove is provided with a stepped structure; the central stud passes through the knob assembly, the panel and the pressure cover in sequence and is screwed together with the central nut; the lower end of the knob assembly is passed through the second mounting groove and is connected to the buckling assembly, the buckling assembly fastens or loosens a group of opposite sides of the pressure cover and the pot body as the knob assembly rotates; the working valve assembly comprises a working valve core, An adjusting member, an air valve nut provided with a first exhaust hole, and a valve cap provided with a plug on the lower side and driven to rise and fall by the adjusting member; the working valve core has a hollow channel passing through its upper and lower sides, and the working valve core passes through the first mounting groove and the pressure cover and is tightened with the air valve nut, and the adjusting member is sleeved on the outer periphery of the working valve core; the valve cap is provided with a second exhaust hole passing through its upper and lower sides, and the hollow channel is connected with the pot through the first exhaust hole; the lower side of the adjusting member protrudes downward to form a protrusion block, and the adjusting member is rotated, and the protrusion block moves along the stepped structure to force the adjusting member 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. When the plug rises, the hollow channel is connected with the second exhaust hole.

[0005] When the regulating piece is rotated and the plug blocks the hollow channel as the valve cap descends, the pressure cooker realizes the function of increasing pressure or maintaining pressure. When the plug opens the hollow channel as the valve cap rises, the first exhaust hole, the hollow channel and the second exhaust hole together form an exhaust channel, and the cookware realizes the function of exhausting and relieving pressure. The cookware realizes the locking or loosening of the pot lid and the pot body by a single-handed rotating operation through the linkage design of the knob assembly and the snap-fit assembly, and the opening and closing operation can be completed with a single hand. The cooperation of the regulating piece and the stepped structure makes the lifting stroke of the valve cap precisely controllable, realizes multi-level pressure adjustment, and realizes rapid response of the exhaust channel.

[0006] The stepped structure includes a first step and a second step, wherein the distance between the second step and the bottom of the first mounting slot is greater than the distance between the first step and the bottom of the first mounting slot. A first inclined surface forming a transition structure is provided between the first step and the first mounting slot, 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 slot form a three-layered stepped structure with three adjustment levels. The two steps, two inclined surfaces, and the first mounting slot together form a three-layered stepped structure, enabling the stepped structure to function as a three-level pressure adjustment mechanism. The three-layered stepped structure provides distinct tactile feedback of the adjustment position when the adjustment member is rotated, allowing the user to accurately identify the current pressure level.

[0007] There are three stepped structures, evenly distributed along the circumference of the first mounting slot; there are three raised blocks, evenly distributed along the circumference of the lower side of the adjusting member. These three evenly distributed stepped structures, together with the three evenly distributed raised blocks, allow the adjusting member to stably adjust the valve bonnet's lift and lowering, achieving stable pressure regulation. The stepped structures and raised blocks work together to form a three-point positioning mechanism, effectively distributing stress during the adjustment process and preventing component wear caused by single-point force.

[0008] The working valve assembly also includes a valve sleeve, a retaining spring and a fastener; the lower section of the working valve core protrudes outward with a circle of first annular protrusions, and the upper section of the working valve core protrudes outward to form a circle of valve column; the panel is provided with a third mounting groove and a first mounting hole, the first mounting groove is connected with the first mounting hole through the third mounting groove and passes through the upper and lower sides of the panel together, the lower section of the working valve core is passed through the first mounting hole, and the first annular protrusion is embedded in the third mounting groove; the valve sleeve is sleeved on the outer periphery of the valve column and can slide along it, the inner side of the lower part of the valve sleeve is provided with a circle of first annular groove, and the retaining spring sleeve The retaining spring is located on the annular groove formed between the valve stem and the first annular protrusion and is positioned within the first annular groove. The inner diameter of the retaining spring hole is smaller than the outer diameter of the valve stem. The fastener is a hollow cylindrical structure, with the lower portion of its outer circumference recessed inward to form a lower groove, and the upper portion of its inner wall recessed outward to form an upper groove. The retaining spring is sleeved around the outer circumference of the valve sleeve and clamped between the adjusting member and the valve sleeve. The inner side of the adjusting member is provided with a second annular protrusion, which is positioned within the lower groove. The lower portion of the valve cap is sleeved around the outer circumference of the valve sleeve and positioned within the upper groove. The retaining spring can limit the valve sleeve, forming resistance to prevent direct separation from the valve stem of the working valve core. The upper and lower grooves of the retaining spring 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 achieving the lifting and lowering of the valve cap.

[0009] The upper outer circumference of the valve sleeve is recessed inward to form a second annular groove. A latch is provided on the lower inner side of the valve bonnet, which is locked in the second annular groove. The engagement between the second annular groove and the latch provides a detachable connection between the valve bonnet and the valve sleeve, preventing the valve bonnet from falling off due to accidental contact.

[0010] The pressure cover has a first guide groove on its upper side. The fastening assembly is symmetrically provided with a pair of fastening assemblies, each pair comprising a connector and a pressure ring. The pressure ring is provided at the outer end of the connector, and a guide post is provided at the inner end of the connector. The connector is mounted in the first guide groove. The second mounting groove has a pair of symmetrical second guide grooves extending through the upper and lower sides of the panel. The knob assembly has a pair of third guide grooves, and the guide post passes through the second guide grooves and then engages within the third guide grooves. When the knob assembly is rotated, the third guide grooves drive the guide post to slide along the second guide grooves, and the connector slides along the first guide grooves, thereby tightening or loosening the pressure cover and the pot body. The second guide grooves are linear, with the same length as the first guide grooves. The third guide grooves gradually extend from the outer side of the knob assembly to the inner side, forming an arc-shaped guide groove. When the knob assembly is rotated, the third guide grooves force the guide post to slide along the second guide grooves, thereby causing the pressure ring to loosen or tighten the pressure cover and the pot body. The third guide groove is an arc-shaped guide groove, and the structure of the arc-shaped guide groove can force the linear movement of the knob assembly to be converted into radial displacement of the guide column, thereby driving the pressure ring to achieve inward buckling or outward loosening.

[0011] The knob assembly includes a cover ear, a decorative piece, and a spring column. A positioning hole is defined on the underside of the cover ear, and an arc-shaped groove is defined on the upper side of the second mounting slot. A rack is provided in the arc-shaped groove. A third annular protrusion protrudes outward from the outer circumference of the spring column. The spring column is sleeved within the positioning hole, with the upper side of the third annular protrusion pressing against the underside of the cover ear. A steel ball located at the lower portion of the spring column is positioned within the arc-shaped groove and slides along the rack. The decorative piece is removably mounted on the upper side of the cover ear. The spring column cooperates with the rack in the arc-shaped groove. When the cover ear rotates, the rolling of the steel ball produces a rolling sound, providing a tactile sensation and emitting a warning sound.

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

[0013] It also includes a safety valve assembly, which includes a safety valve core, a safety valve lower part, a retaining ring, a safety valve upper part, a safety valve spring and a safety valve sealing ring; the safety valve upper part has a cavity inside, and a third exhaust hole is provided on its top to connect the environment outside the pot with the cavity, and its lower outer periphery bulges outward by a circle to form a fourth annular protrusion; the safety valve lower part is a cylindrical structure opening upward, and a fourth exhaust hole is provided on its bottom surface, and a circle of third annular groove is provided on the lower outer periphery of the safety valve lower part, and the retaining ring is sleeved in the third annular groove; the middle outer periphery of the safety valve core bulges outward by a circle to form a fifth annular protrusion, and the lower section of the safety valve core is recessed inward to form a circle of fourth annular groove, and the safety valve sealing ring is sleeved in the fourth annular groove, and the diameter of the safety valve sealing ring is larger than the diameter of the first annular groove The pressure cover has a second mounting hole. The safety valve lower member passes through the second mounting hole from bottom to top and is screwed together with the lower end of the safety valve upper member via a threaded connection. The safety valve spring and safety valve core are located in the cavity formed by the safety valve lower member and the safety valve upper member. The upper end of the safety valve spring presses against the inner wall of the safety valve upper member, while its lower end fits around the outer periphery of the upper section of the safety valve core and presses against the fifth annular protrusion, prompting the safety valve sealing ring to close or open the fourth exhaust hole. The panel has a third mounting hole, and the top of the safety valve upper member is located in the third mounting hole and can slide up and down along the third mounting hole. 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 provided to assist in venting the cookware. The cooperation between the retaining ring and the fourth annular protrusion ensures that the safety valve assembly can only be raised or lowered within the range between them. When the pressure in 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 exhaust hole, thereby realizing the pressurization or pressure maintenance function; when the pressure in 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 opens the fourth exhaust hole, and the gas in the pot enters the cavity formed by the safety valve lower part and the safety valve upper part from the fourth exhaust hole, and then enters the cavity of the safety valve upper part, and finally is discharged out of the pot from the third exhaust hole.

[0014] The side wall of the adjusting member is provided with a shift block. The first mounting slot extends upward to form a positioning tube. The positioning tube has a positioning slot, and the shift block is inserted into and slides along the positioning slot. The shift block facilitates the operator's rotation of the adjusting member, while the positioning slot restricts the range of motion of the shift block.

[0015] Compared with the prior art, the advantages of the present invention are: the cookware can tighten or loosen the lid and the pot body by rotating the knob assembly, and the opening and closing operation can be completed with one hand; by rotating the adjustment part, the three-layer stepped structure and the raised block are combined to control the lifting of the valve cap to realize the triple-speed pressure adjustment function; it can perform sealed pressurization or exhaust pressure relief to meet various cooking needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structural decomposition of an embodiment of the present invention;

[0017] Figure 2 A top view of an embodiment of the present invention;

[0018] Figure 3 A partial cross-sectional view of an embodiment of the present invention taken along the longitudinal direction;

[0019] Figure 4 for Figure 3 A partial enlarged schematic diagram of point A in the middle;

[0020] Figure 5 for Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0021] Figure 6 for Figure 3 A partial enlarged schematic diagram of point C in the middle;

[0022] Figure 7 This is a cross-sectional view of a pot cover cut along the longitudinal direction according to an embodiment of the present invention;

[0023] Figure 8 This is a cross-sectional view of the pot lid of the embodiment of the present invention, with the lid ears removed, taken longitudinally;

[0024] Figure 9 This is a top view of the adjusting member in the embodiment of the present invention when it is in the zero position;

[0025] Figure 10 This is a cross-sectional view of the pot cover when the adjusting member is in the neutral position and is cut longitudinally along the shift block according to an embodiment of the present invention;

[0026] Figure 11 This is a cross-sectional view of the pot cover with the majority of the working valve assembly removed when the adjusting member is in the neutral position and cut longitudinally along the shift block according to an embodiment of the present invention;

[0027] Figure 12 This is a top view of the adjusting member in the embodiment of the present invention when it is in the first gear;

[0028] Figure 13 This is a cross-sectional view of the pot cover when the adjusting member is in the first gear and is cut longitudinally along the shift block according to an embodiment of the present invention;

[0029] Figure 14 This is a cross-sectional view of the pot cover with the majority of the working valve assembly removed when the adjusting member is in the first gear and cut longitudinally along the shift block according to an embodiment of the present invention;

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

[0031] Figure 16 This is a cross-sectional view of the pot cover when the adjusting member is in the second gear and cut along the longitudinal direction of the shift block according to an embodiment of the present invention;

[0032] Figure 17 This is a cross-sectional view of the pot cover with the majority of the working valve assembly removed when the adjusting member is in the second gear and cut along the longitudinal direction of the shift block according to an embodiment of the present invention;

[0033] Figure 18 This is a schematic structural diagram of the bottom side of the knob assembly according to an embodiment of the present invention;

[0034] Figure 19 It is a cross-sectional view of the knob assembly according to an embodiment of the present invention cut along the longitudinal direction;

[0035] Figure 20 A top view of a lid ear according to an embodiment of the present invention;

[0036] Figure 21 A perspective view of an ear cover according to an embodiment of the present invention;

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

[0038] Figure 23 A three-dimensional diagram of the upper side of the panel according to an embodiment of the present invention;

[0039] Figure 24 A three-dimensional diagram of the bottom side of the panel according to an embodiment of the present invention;

[0040] Figure 25 This is a schematic diagram of the structural decomposition of a working valve assembly according to an embodiment of the present invention;

[0041] Figure 26 This is a structural exploded cross-sectional view of a working valve assembly according to an embodiment of the present invention, cut along the longitudinal direction;

[0042] Figure 27 This is a schematic diagram of the structural decomposition of a safety valve assembly according to an embodiment of the present invention;

[0043] Figure 28 This is a structural exploded sectional view of a safety valve assembly according to an embodiment of the present invention, cut along the longitudinal direction.

[0044] 1. The meaning of the reference numerals in the figure: 1. pressure cover; 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 stage; 222. second stage; 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. connecting piece; 33. guide column; 4. working valve assembly; 41. working valve core; 411. first annular protrusion; 412. valve column; 42. adjusting piece; 421. protrusion block; 422. second annular protrusion; 423. shift block; 43. air valve nut; 431. first exhaust hole; 44. valve cap; 441. plug ; 442, second exhaust hole; 443, clamp; 45, valve sleeve; 451, first annular groove; 452, second annular groove; 46, retaining spring; 47, fastener; 471, lower groove; 472, upper groove; 5, knob assembly; 51, cover ear; 511, third guide groove; 512, positioning hole; 52, decorative sheet; 53, spring column; 531, third annular protrusion; 54, center stud; 55, center Nut; 6. Safety valve assembly; 61. Safety valve core; 611. Fifth annular protrusion; 612. Fourth annular groove; 62. Safety valve lower piece; 621. Fourth exhaust hole; 622. Third annular groove; 63. Snap ring; 64. Safety valve upper piece; 641. Third exhaust hole; 642. Fourth annular protrusion; 65. Safety valve spring; 66. Safety valve sealing ring; 71. Ear seat; 72. Retaining ring; 73. Side ear. DETAILED DESCRIPTION

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

[0046] Example

[0047] See Figures 1 to 28, is a safety pressure cooker, comprising a lid and a pot body, the lid comprising a pressure cover 1, a panel 2 arranged on the pressure cover 1, a snap-fit assembly, a working valve assembly 4 for exhausting and adjusting pressure, a knob assembly 5, a central stud 54 and a central nut 55; the panel 2 is provided with a first mounting groove 21 and a second mounting groove 26, and a step structure 22 is provided in the first mounting groove 21; the central stud 54 passes through the knob assembly 5, the panel 2 and the pressure cover 1 in sequence and is tightened with the central nut 55; the lower end of the knob assembly 5 is passed through the second mounting groove 26 and is connected to the snap-fit assembly, and the snap-fit assembly tightens or loosens a group of opposite sides of the pressure cover 1 and the pot body as the knob assembly 5 rotates; the working valve assembly 4 comprises a working valve core 41, an adjusting member 42, and a valve nut provided with a first exhaust hole 431 43. A valve cap 44 is provided with a plug 441 on the lower side and is driven to rise and fall by an adjusting member 42; the working valve core 41 has a hollow channel running through its upper and lower sides. 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 is provided with a second exhaust hole 442 running through its upper and lower sides, and the hollow channel is connected to the pot through the first exhaust hole 431; the lower side of the adjusting member 42 protrudes downward to form a protruding block 421. When the adjusting member 42 is rotated, the protruding block 421 moves along the stepped structure 22, forcing the adjusting member 42 to drive the valve cap 44 to rise and fall, and 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 regulating member 42 is rotated and the plug 441 descends with the valve cap 44 to block the hollow channel, the pressure cooker realizes the function of increasing pressure or maintaining pressure. When the plug 441 rises with the valve cap 44 to open the hollow channel, the first exhaust hole 431, the hollow channel and the second exhaust hole 442 together form an exhaust channel, and the cookware realizes the function of exhausting and relieving pressure. The present cookware realizes the locking or loosening of the pot lid and the pot body by a single-handed rotating operation through the linkage design of the knob assembly 5 and the snap-fit assembly, and the opening and closing operation can be completed with a single hand. The cooperation of the regulating member 42 and the stepped structure 22 makes the lifting stroke of the valve cap 44 precisely controllable, realizes multi-stage pressure adjustment, and realizes the rapid response of the exhaust 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 slot 21 is greater than the distance between the first step 221 and the bottom of the first mounting slot 21. A first inclined surface 223, forming a transition structure, is provided between the first step 221 and the first mounting slot 21. 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 slot 21 form a three-layered stepped structure with three adjustment levels. The two steps, two inclined surfaces, and the first mounting slot 21 together form a three-layered stepped structure, enabling the stepped structure 22 to function as a three-level pressure adjustment mechanism. This three-layered stepped structure provides distinct tactile feedback when the adjustment member 42 is rotated, 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 located in the front direction and the second inclined surface 224 is located in the rear direction. The first inclined surface 223 first meets the protruding block 421. A third inclined surface can be further provided between the first inclined surface 223 and the first step 221, which is inclined downward from the first inclined surface 223 to the first step 221. The provision of the third inclined surface can prevent the protruding block 421 from automatically rebounding or falling back to its initial state.

[0050] Three stepped structures 22 are evenly distributed along the circumference of the first mounting slot 21; three raised blocks 421 are evenly distributed along the circumference of the underside of the adjusting member 42. These three evenly distributed stepped structures 22, together with the three evenly distributed raised blocks 421, ensure that the adjusting member 42 can stably adjust the valve cap 44, thus achieving stable pressure regulation. The stepped structures 22 and raised blocks 421 form a three-point positioning mechanism, effectively distributing stress during the adjustment process and preventing component wear caused by single-point stress.

[0051] The working valve assembly 4 also includes a valve sleeve 45, a retaining spring 46 and a fastener 47; the lower section of the working valve core 41 protrudes outward with a circle of first annular protrusions 411, and the upper section of the working valve core 41 protrudes outward to form a circle of valve column 412; the panel 2 is provided with a third mounting groove 23 and a first mounting hole 24, the first mounting groove 21 is connected with the first mounting hole 24 through the third mounting groove 23 and passes through the upper and lower sides of the panel 2 together, the lower section of the working valve core 41 is passed 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 inner side of the lower part of the valve sleeve 45 is provided with a circle of first annular grooves 451, the retaining spring 46 is sleeved on the annular groove formed between the valve stem 412 and the first annular protrusion 411 and is located in the first annular groove 451. The inner diameter of the hole of the retaining spring 46 is smaller than the outer diameter of the valve stem 412. The fastener 47 is a hollow cylindrical structure, with its lower outer circumference recessed inward to form a lower groove 471, and its upper inner wall recessed outward to form an upper groove 472. The retaining spring 47 is sleeved on the outer circumference of the valve sleeve 45 and clamped between the adjusting member 42 and the valve sleeve 45. The inner side of the adjusting member 42 is provided with a second annular protrusion 422, which is located in the lower groove 471. The lower portion of the valve cap 44 is sleeved on the outer circumference of the valve sleeve 45 and is located in the upper groove 472. The provision of the retaining spring 46 can limit the valve sleeve 45, forming a resistance to prevent direct separation from the valve stem 412 of the working valve core 41. The arrangement of the upper groove 472 and the lower groove 471 of the fastener 47 can realize a flexible connection with the adjusting member 42 and the valve sleeve 45, so that the adjusting member 42 can transmit force to the valve cap 44 through the valve sleeve 45, thereby realizing the lifting and lowering of the valve cap 44.

[0052] The upper outer circumference of the valve sleeve 45 is recessed inward to form a second annular groove 452. A latch 443 is provided on the lower inner side of the valve bonnet 44, which is secured within the second annular groove 452. The engagement between the second annular groove 452 and the latch 443 allows the valve bonnet 44 to be detachably connected to the valve sleeve 45, preventing the valve bonnet 44 from accidentally falling off.

[0053] The upper side of the pressure cover 1 is provided with a first guide groove 11; the buckle assembly is symmetrically provided with a pair, each pair of buckle assemblies includes a connector 32 and a pressure ring 31, the pressure ring 31 is provided at the outer end of the connector 32, and a guide column 33 is provided at the inner end of the connector 32, and the connector 32 is installed in the first guide groove 11; the second mounting groove 26 is symmetrically provided with a pair of second guide grooves 261 that penetrate the upper and lower sides of the panel 2, and the knob assembly 5 is provided with a pair of third guide grooves 511, and the guide column 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, the connecting piece 32 slides along the first guide groove 11, and the two pressure rings 31 fasten or loosen the pressure cover 1 and the pot body; the second guide groove 261 is a linear 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 the inside thereof to form an arc-shaped guide groove, and the arc-shaped guide groove extends from the outer edge of the knob assembly 5 to the center in an involute manner. In this embodiment, the third guide groove 511 is provided on the cover ear 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 driving the pressure ring 31 to loosen or fasten the pressure cover 1 and the pot body. The third guide groove 511 is an arc-shaped guide groove. This structure converts the linear motion of the knob assembly 5 into radial displacement of the guide post 33, thereby driving the pressure ring 31 to engage or disengage inward. In this embodiment, the pressure ring 31 has a U-shaped arc-shaped groove at one end. This is a mature, commercially available accessory, and therefore requires no detailed structural analysis.

[0054] The knob assembly 5 includes a cover ear 51, a decorative piece 52, and a spring post 53. A positioning hole 512 is defined on the underside of the cover ear 51, and an arc-shaped groove 262 is defined on the upper side of the second mounting slot 26. This groove 262 is equipped with a rack. The spring post 53 has a third annular protrusion 531 extending outward from its periphery. The spring post 53 is sleeved within the positioning hole 512, with the upper side of the third annular protrusion 531 pressing against the underside of the cover ear 51. A steel ball located on the lower portion of the spring post 53 is positioned within the arc-shaped groove 262 and slides along the rack. The decorative piece 52 is removably mounted on the upper side of the cover ear 51. The spring post 53 cooperates with the rack in the arc-shaped groove 262. When the cover ear 51 is rotated, the rolling of the steel ball produces a tactile sound and a audible prompt. In this embodiment, a circular hole is provided at both ends and the middle of the arc-shaped slide groove 262. The steel ball of the spring column 53 is placed in the circular hole when sliding. The circular holes at both ends can prompt the operator to rotate to the extreme position, and the circular hole in the middle provides a sense of frustration, prompting the operator that the cover ear 51 is rotating.

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

[0056] The safety valve assembly 6 is also included, which includes a safety valve core 61, a safety valve lower part 62, a retaining ring 63, a safety valve upper part 64, a safety valve spring 65 and a safety valve sealing ring 66; the safety valve upper part 64 has a cavity inside, and a third exhaust hole 641 is provided on its top to connect the environment outside the pot with the cavity, and its lower outer periphery bulges outward by a circle to form a fourth annular protrusion 642; the safety valve lower part 62 is a cylindrical structure opening upward, and a fourth exhaust hole 621 is provided on its bottom surface, and a circle of third annular groove 622 is provided on the lower outer periphery of the safety valve lower part 62, and the retaining ring 63 is sleeved in the third annular groove 622; the middle outer periphery of the safety valve core 61 bulges outward by a circle to form a fifth annular protrusion 611, and the lower section of the safety valve core 61 is recessed inward to form a circle of fourth annular groove 612, and the safety valve sealing ring 66 is sleeved in the fourth annular groove 612, The diameter of the sealing ring 66 is larger than the diameter of the fourth vent 621. The pressure cap 1 has a second mounting hole 12. The safety valve lower member 62 passes through the second mounting hole 12 from bottom to top and is screwed together with the lower end of the safety valve upper member 64 via a threaded connection. The safety valve spring 65 and the safety valve core 61 are located in the cavity formed by the safety valve lower member 62 and the safety valve upper member 64. The upper end of the safety valve spring 65 presses against the inner wall of the safety valve upper member 64, while its lower end fits around the outer periphery of the upper section of the safety valve core 61 and presses against the fifth annular protrusion 611, thereby urging the safety valve sealing ring 66 to close or open the fourth vent 621. The panel 2 has a third mounting hole 25, and the top of the safety valve upper member 64 is located within the third mounting hole 25 and can slide up and down along the third mounting hole 25. 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 in venting the cookware. The cooperation between the retaining ring 63 and the fourth annular protrusion 642 allows the safety valve assembly 6 to be raised and lowered only within the range between the two. When the pressure in 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 exhaust hole 621, thereby achieving the pressure-increasing or pressure-maintaining function. When the pressure in the pot exceeds the set value, the entire safety valve assembly 6 rises, pushing up the safety valve core 61, and the safety valve sealing ring 66 opens the fourth exhaust hole 621. The gas in the pot enters the cavity formed by the safety valve lower part 62 and the safety valve upper part 64 through the fourth exhaust hole 621, then enters the cavity of the safety valve upper part 64, and finally exits the pot through the third exhaust hole 641. In this embodiment, the side wall of the safety valve lower part 62 is provided with an air leakage hole that penetrates its inner and outer walls. When the air pressure in the pot is lower than the set value (5KPa), the gas in the pot can enter the cavity between the safety valve lower part 62 and the safety valve upper part 64 from the air leakage hole, and then be discharged out of the pot from the third exhaust hole 641.

[0057] A shift block 423 is provided on the sidewall of the adjusting member 42. The first mounting slot 21 extends upward to form a positioning tube 211. Positioning tube 211 defines a positioning slot 212, into which the shift block 423 slides. The provision of the shift block 423 facilitates the operator's rotation of the adjusting member 42; the positioning slot 212 restricts the range of motion of the shift block 423.

[0058] In this embodiment, when the working valve assembly 4, the safety valve assembly 6, etc. are inserted into the pressure cover 1 and the panel 2, corresponding mounting holes will be opened. These mounting holes are opened according to actual needs, so there is no need to describe them one by one in the structure of this application.

[0059] Installation of this embodiment:

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

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

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

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

[0064] 4) Place the decorative sheet 52 above the cover ear 51, align the hooks on the decorative sheet 52 with the buckle positions around the cover ear 51, and fasten the decorative sheet 52 to 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 from bottom to top onto the set installation position (fourth annular groove 612) of the safety valve core 61;

[0067] 6) Place the snap ring 63 under the safety valve lower part 62 and clamp the snap ring 63 on the groove (third annular groove 622) set on the safety valve lower part 62 from bottom to top;

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

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

[0070] 9) Place the safety valve lower part 62 under the pot cover, and insert the safety valve lower part 62 into the second mounting hole 12 set in the pot cover from bottom to top. Then place the safety valve upper part 64 on the safety valve lower part 62 and connect it to the safety valve lower part 62 through threads, so that the pot cover is stuck between the safety valve upper part 64 and the safety valve lower 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 push the pressure ring 31 against the pressure cover 1 from the outside to the inside;

[0073] 11) Place the ear 51 assembly on top of the pot lid, aligning the center stud 54 of the ear 51 assembly with the center hole set in the pot lid and the safety valve vent (third mounting hole 25) set in the panel 2 with the safety valve upper piece 64. Fasten the ear 51 assembly onto the pot lid from top to bottom, ensuring that the guide post 33 set in the pressure ring 31 can pass through the second guide groove 261 set in the panel 2 and the third guide groove 511 set in the ear 51. Then, lock the ear 51 assembly to the pot lid with the center nut 55.

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

[0075] 12) Place the retaining ring 46 below the valve sleeve 45 and insert the retaining 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 from bottom to top into the valve sleeve 45;

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

[0078] 15) Place the valve bonnet 44 on top of the valve sleeve 45, aligning the undercut (clamp 443) of the valve bonnet 44 with the buckle position (second annular groove 452) of the valve sleeve 45, and buckle the valve bonnet 44 onto the valve sleeve 45 from top to bottom;

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

[0080] 17) Insert the working valve core 41 from top to bottom through the working valve mounting holes (first mounting hole 24, third mounting slot 23) set on the panel 2 and the pressure cover 1, and make the adjustment member 42 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 the side ear 73 assembly:

[0082] 18) Weld the ear seat 71 to the set position of the pot body;

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

[0084] 20) Place the side ear 73 on one side of the ear seat 71, aligning the through hole of the side ear 73 with the threaded hole of the ear seat 71, and then tighten the side ear 73 and the ear seat 71 with screws;

[0085] 21) Place the assembled lid on top of the pot body, and buckle the lid onto 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 member 42 has three gears, namely zero gear, first gear and second gear. The zero gear corresponds to the protrusion 421 being located on the second stage 222, the first gear corresponds to the protrusion 421 being located on the first stage 221, and the second gear corresponds to the protrusion 421 being located on the bottom of the first mounting groove 21.

[0089] 4. When the adjusting member 42 is turned to the zero position, the highest section (second stage 222) of the three-stage stepped structure 22 set by the panel 2 contacts the raised block 421 of the adjusting member 42. At this time, the adjusting member 42 pushes the valve cap 44 to the highest position. At this time, the exhaust passage between the valve cap 44 and the working valve core 41 is opened to the maximum, so that the gas in the pot can pass through the working valve core 41 and then through the valve cap 44 to be discharged outward to reduce the pressure; when the adjusting member 42 is turned counterclockwise to the first gear position (first stage 221), the middle section of the three-stage stepped structure 22 set by the panel 2 contacts the raised block 421 of the adjusting member 42. At this time, the height of the valve cap 44 will be in the middle state, and the valve cap 44 and the working valve core will be in the middle state. The exhaust passage between the cores 41 becomes smaller, and the gas in the pot is blocked from being discharged outward, causing the air pressure in the pot to increase; when the adjusting member 42 is turned to the second gear (the bottom of the first mounting groove 21), the lowest end of the three-stage stepped structure 22 set by the panel 2 contacts the raised block 421 of the adjusting member 42. At this time, the height of the valve cap 44 is reduced to the lowest, and the exhaust passage of the working valve core 41 is blocked by the downward-pressed valve cap 44, so that a sealed state is formed in the pot, and the air pressure in the pot can reach the maximum upper limit (120KPa); when the air pressure in the pot exceeds the maximum upper limit (above 120KPa), the gas will lift the downward-pressed valve cap 44, the exhaust passage is opened, and the gas is discharged outward to reduce the pressure, so that the air pressure in the pot remains constant.

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

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

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

[0093] When the pressure cover 1 is in the open state, the cover ear 51 is rotated counterclockwise. The centrally symmetrical third guide groove 511 set in the cover ear 51 drives the guide column 33 set in the pressure ring 31 to converge toward the center. Since the guide column 33 passes through the second guide groove 261 set in the panel 2, the connecting member 32 can only converge in a straight line. When the cover ear 51 rotates to the limit position and cannot rotate further, the pressure ring 31 is retracted inward to the tightest state. At this time, the pressure ring 31 is fastened to the pot body, and the pressure cover 1 is now in a locked state. The cover ear 51 is rotated clockwise. The centrally symmetrical third guide groove 511 of the cover ear 51 drives the guide column 33 set in the pressure ring 31 to be pushed outward from the center. When the cover ear 51 rotates to the limit position and cannot rotate further, the pressure ring 31 is pushed outward to the open state. At this time, the pressure ring 31 can no longer fasten the pot body. The pot lid can be separated from the pot body by lifting the pot lid upward.

[0094] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not depart from the present invention should be included in the patent scope of this case.

Claims

1. A safety pressure cooker, comprising a lid and a body, characterized in that: The pot cover includes a pressure cover, a panel arranged on the pressure cover, a snap-fit assembly, a working valve assembly for exhausting and adjusting pressure, a knob assembly, a center stud and a center nut; the panel is provided with a first mounting groove and a second mounting groove, and a step structure is provided in the first mounting groove; the center stud passes through the knob assembly, the panel and the pressure cover in sequence and is tightened with the center nut; the lower end of the knob assembly is passed through the second mounting groove and is connected to the snap-fit assembly, and the snap-fit assembly fastens or loosens a group of opposite sides of the pressure cover and the pot body as the knob assembly rotates; the working valve assembly includes a working valve core, an adjusting member, a valve nut provided with a first exhaust hole, A plug is provided on the lower side and a valve cap is driven to rise and fall by an adjusting member; the working valve core has a hollow channel passing through its upper and lower sides, and the working valve core is tightened with the air valve nut after passing through the first mounting groove and the pressure cover, and the adjusting member is sleeved on the outer periphery of the working valve core; the valve cap is provided with a second exhaust hole passing through its upper and lower sides, and the hollow channel is connected with the pot through the first exhaust hole; the lower side of the adjusting member protrudes downward to form a protrusion block, and when the adjusting member is rotated, the protrusion block moves along the stepped structure to force the adjusting member 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. When the plug rises, the hollow channel is connected with the second exhaust hole.

2. The safety pressure cooker according to claim 1, characterized in that: The stepped structure includes a first step and a second step, and 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 adjustment gears.

3. The safety pressure cooker according to claim 1, characterized in that: There are three step structures, which are evenly distributed along the same circumference of the first mounting groove; there are three protruding blocks, 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 also includes a valve sleeve, a retaining spring and a fastener; the lower section of the working valve core protrudes outward with a circle of first annular protrusions, and the upper section of the working valve core protrudes outward to form a circle of valve column; the panel is provided with a third mounting groove and a first mounting hole, the first mounting groove is connected with the first mounting hole through the third mounting groove and passes through the upper and lower sides of the panel together, the lower section of the working valve core is passed through the first mounting hole, and the first annular protrusion is embedded in the third mounting groove; the valve sleeve is sleeved on the outer periphery of the valve column and can slide along it, the inner side of the lower part of the valve sleeve is provided with a circle of first annular groove, and the retaining spring sleeve It is arranged on the annular groove formed between the valve column and the first annular protrusion and is located in the first annular groove, and the inner diameter of the hole of the retaining spring is smaller than the outer diameter of the valve column; the fastener is a hollow cylindrical structure, the lower part of its outer periphery is recessed inward to form a circle of lower groove, and the upper part of its inner wall is recessed outward to form a circle of upper groove; the fastener is sleeved on the outer periphery of the valve sleeve and clamped between the adjusting member and the valve sleeve; a circle of second annular protrusion is provided on the inner side of the adjusting member, and the second annular protrusion is located in the lower groove; the lower part of the valve cap is sleeved on the outer periphery of the valve sleeve and is located in the upper groove.

5. The safety pressure cooker according to claim 4, characterized in that: The outer periphery of the upper portion of the valve sleeve is recessed inward to form a circle of second annular groove, and a clamping piece is provided at the lower inner side of the valve cap, and the clamping piece is clamped in the second annular groove.

6. The safety pressure cooker according to claim 1, characterized in that: A first guide groove is provided on the upper side of the pressure cover; a pair of snap-fit components are symmetrically provided, each pair of snap-fit components includes a connecting piece and a pressure ring, the pressure ring is provided at the outer end of the connecting piece, and a guide column is provided at the inner end of the connecting piece, and the connecting piece is installed in the first guide groove; a pair of second guide grooves are symmetrically provided in the second installation groove, which penetrate the upper and lower sides of the panel, and the knob assembly is provided with a pair of third guide grooves, and the guide column is embedded in the third guide groove after passing through the second guide groove; when the knob assembly rotates, the third guide groove drives the guide column to slide along the second guide groove, and the connecting piece slides along the first guide groove, and the two pressure rings tighten or loosen the pressure cover and the pot body; the second guide groove is a linear guide groove, and 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 the inside thereof to form an arc-shaped guide groove.

7. The safety pressure cooker according to claim 1, characterized in that: The knob assembly includes a cover ear, a decorative piece and a spring column; a positioning hole is provided on the lower side of the cover ear, and an arc-shaped slide groove is provided on the upper side of the second mounting groove, and the arc-shaped slide groove is provided with a rack; a third annular protrusion is raised outward on the outer circumference of the spring column, and the spring column is sleeved in the positioning hole, and the upper side of the third annular protrusion presses against the lower side of the cover ear, and the steel ball provided on the lower part of the spring column is located in the arc-shaped slide groove and slides along the rack; the decorative piece can be detachably mounted on the upper side of the cover ear.

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

9. The safety pressure cooker according to claim 1, characterized in that: It also includes a safety valve assembly, which includes a safety valve core, a safety valve lower part, a retaining ring, a safety valve upper part, a safety valve spring and a safety valve sealing ring; the safety valve upper part has a cavity inside, and a third exhaust hole is provided on its top to connect the environment outside the pot with the cavity, and its lower outer periphery bulges outward by a circle to form a fourth annular protrusion; the safety valve lower part is a cylindrical structure opening upward, and a fourth exhaust hole is provided on its bottom surface, and a circle of third annular groove is provided on the lower outer periphery of the safety valve lower part, and the retaining ring is sleeved in the third annular groove; the middle outer periphery of the safety valve core bulges outward by a circle to form a fifth annular protrusion, and the lower section of the safety valve core is recessed inward to form a circle of fourth annular groove, and the safety valve sealing ring is sleeved in the fourth annular groove, and the diameter of the safety valve sealing ring is larger than the diameter of the first annular groove The apertures of the four exhaust holes; a second mounting hole is provided on the pressure cover; the safety valve lower part passes through the second mounting hole from bottom to top and is screwed together with the lower end of the safety valve upper part through a threaded connection; the safety valve spring and the safety valve core are located in the cavity formed by the safety valve lower part and the safety valve upper part, the upper end of the safety valve spring presses against the inner wall of the safety valve upper part, and the lower end thereof is sleeved on the outer periphery of the upper section of the safety valve core and presses against the fifth annular protrusion and prompts the safety valve sealing ring to close or open the fourth exhaust hole; a third mounting hole is provided on the panel, and the top of the safety valve upper 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: A shift block is provided on the side wall of the adjusting member. The first mounting groove extends upward to form a positioning cylinder. The positioning cylinder is provided with a positioning groove. The shift block is embedded in the positioning groove and can slide along the positioning groove.

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