Anti-misoperation device for pressure cooker

Abstract

The present invention discloses an anti-misoperation device for a pressure cooker. The device is installed on the pressure cooker, which includes a pot body and a pressure cover. The pressure cover is placed above the pot body. The anti-misoperation device includes an upper fastening structure, a lower fastening structure, an anti-opening structure, and an anti-misoperation structure. The upper fastening structure and the anti-misoperation structure are arranged on the pressure cover, the lower fastening structure is arranged on the pot body along the pot edge, and the anti-opening structure is arranged on the side ears. A pot mouth sealing ring is installed on the inner side of the pressure cover. When the pressure cover rotates along the pot body, the upper fastening structure and the lower fastening structure are spaced apart and alternately present in two states: fastened and unfastened. The lower fastening structure triggers the anti-misoperation structure. When the air pressure in the pot exceeds the working pressure value, the anti-misoperation structure is engaged with the anti-opening structure. The anti-misoperation structure of the device is engaged with the anti-opening structure, thereby locking the pressure cover, preventing the user from forcibly opening the cover improperly, resulting in an explosion or flying cover accident, thereby reducing the risk of use.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen cooking utensils, and in particular to an anti-misoperation device for a pressure cooker. Background Art

[0002] Some pressure cookers on the market are prone to having their lids and pots partially open, causing them to become loose and leaking pressure. Alternatively, users may fail to reduce the heat in time when the pressure inside the pot is too high, leading to safety accidents. Users may also open the pressure lid without noticing the pressure inside the pot, causing it to explode and fly off. Summary of the Invention

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

[0004] The present invention is achieved through the following technical solutions: an anti-misoperation device for a pressure cooker, which is installed on the pressure cooker, the pressure cooker comprising a pot body and a pressure cover, the pressure cover being placed above the pot body, a pair of side ears being respectively installed on the pot body, the anti-misoperation device comprising an upper fastening structure, a lower fastening structure, an anti-opening structure and an anti-misoperation structure; the upper fastening structure and the anti-misoperation structure are arranged on the pressure cover, the lower fastening structure is arranged on the pot body along the pot edge, and the anti-opening structure is arranged on the side ears; a pot mouth sealing ring is installed on the inner side of the pressure cover; when the pressure cover rotates along the pot body, the upper fastening structure and the lower fastening structure are spaced apart and alternately present in two states of fastening and non-fastening, the lower fastening structure triggers the anti-misoperation structure, and when rotated to a set position, the upper fastening structure and the lower fastening structure are in a fastening state, and when there is air pressure in the pot, the anti-misoperation structure is triggered and slowly snaps into the anti-opening structure.

[0005] The pressure cover rotates along the pot body to a set position, and the upper fastening structure and the lower fastening structure are in a fastened state, which can keep the pressure cooker in a sealed state; when there is air pressure in the pot, the anti-misoperation structure can assist in deflating; when the pressure in the pot is too high, the anti-misoperation structure is locked into the anti-opening structure to prevent the pressure cover from being opened by mistake, thereby avoiding accidental injuries such as explosion and flying cover, thereby improving the safety of the pressure cooker; this device is used to prevent misoperation and is used in conjunction with an exhaust valve, a pressure relief valve, and the like.

[0006] The lower fastening structure includes a lower protrusion and a lower groove, the lower protrusion is formed by the pot body along the pot edge protruding toward the outside of the pot, the lower protrusion is provided with a plurality of lower protrusions, and the lower groove is formed between adjacent lower protrusions; the upper fastening structure includes an upper protrusion and an upper groove, the outer periphery of the pressure cover is provided with a cover edge for fastening the pot body, the inner lower part of the cover edge protrudes toward the inside of the pot to form the upper protrusion, the upper protrusion is provided with a plurality of upper protrusions, and the upper groove is formed between adjacent upper protrusions; the upper protrusion matches the shape of the lower groove, and the lower protrusion matches the upper groove. The groove shapes match; when the pressure cover is placed on the pot body, the upper protrusion aligns with the lower groove. By rotating the pressure cover, the lower protrusion and the upper protrusion are gradually offset until the lower protrusion is above the upper protrusion, thus completing the tightening of the pressure cover to the pot body. The lower groove and the upper groove are positioned opposite each other, and the anti-misoperation structure is aligned with the anti-opening structure. The anti-misoperation structure is located above the upper groove and is inserted through the side wall of the pot mouth sealing ring and the cover edge of the pressure cover. The pressure cover and the pot body are fastened together by overlapping their protrusions. During cooking, due to the increase in pressure, the pressure cover and the pot body are fastened more tightly.

[0007] The anti-misoperation structure includes a valve sleeve, a valve core, a spring, a limit gasket, a valve member sealing ring and a steel ball; the valve sleeve is sequentially arranged on the cover edge of the pressure cover and the side wall of the pot mouth sealing ring from the outside to the inside, the interior of the valve sleeve is hollow to form a through channel, the middle part of the through channel is convex inward to form a circle of first annular protrusions, and a side hole is provided on one side wall of the first annular protrusion, and the side hole connects the through channel with the outside; the valve core is inserted into the through channel of the valve sleeve from the outside to the inside, the side hole is located on the lower side and faces the lower side of the pot mouth sealing ring, the lower section of the side hole is concave outward to form a circle of annular groove, the annular groove is provided with a circular groove with a positioning hole on the lower side, the steel ball is placed in the side hole, and the bottom of the steel ball is embedded in the positioning hole and Located in the space inside the pot, the steel ball has a gap from the top side of the first annular protrusion, and the height of the bottom of the steel ball is lower than the height of the upper side of the lower protrusion; the outer side of the inner section of the valve core is sequentially sleeved with the valve component sealing ring and the limiting gasket, and the spring is sleeved on the outer periphery of the valve core, one end of which presses against the first annular protrusion and the other end presses against the valve component sealing ring; the lower side of the pot mouth sealing ring is provided with a mounting hole, and the circular groove is embedded in the mounting hole; the inner end surface of the valve core is concave inward to form a concave hole; under normal pressure, the spring presses against the valve component sealing ring to push out of the pot, and the valve core contracts into the pot; when there is air pressure in the pot, the air pressure flows out from the gap between the limiting gasket and the valve sleeve, pushing the valve core outward. The setting of the first annular protrusion can form a support for the spring, and the setting of the spring has elastic force, which always pushes the valve core into the pot. The through channel forms a channel for the valve core to move; there is a gap between the steel ball and the top side of the first annular protrusion, so that there is a movable distance between the steel ball and the valve core; the height of the bottom of the steel ball is lower than the height of the upper side of the lower protrusion, so that when the pressure cooker rotates, the lower protrusion pushes the steel ball up, thereby pushing the valve core to prevent it from moving outward. The concave hole on the inner end face of the valve core can form a power point for the air pressure impact, so that the limit gasket and the valve sealing ring can push the valve core outward together. When the valve core is pushed outward, when the valve sealing ring fits the inner end of the valve sleeve, the gap between the inner end of the valve core and the inner end of the valve sleeve can be sealed, so that the air pressure escapes from one side of the steel ball, thereby pushing up the steel ball, and realizing the exhaust function in the gap between the outer section of the valve core and the outer section of the valve sleeve.

[0008] The outer section of the valve core is provided with a positioning groove. Under normal pressure, the positioning groove is aligned with the side hole. When the pressure cover rotates, the edge of the lower protrusion rotates above the edge of the upper protrusion, the lower protrusion contacts the steel ball, and the steel ball is lifted and locked into the positioning groove. When the pressure cover rotates to the set position, the valve core is aligned with the anti-opening structure, and the valve sleeve is located above the lower groove. When air pressure is applied to the pot, the valve core extends outward, the positioning groove is misaligned with the side hole, and the outer end of the valve core is inserted into the anti-opening structure. When the pressure cover rotates around the pot body, when the steel ball contacts the lower protrusion, the steel ball is lifted and enters the positioning groove from the side hole, thereby pressing against the valve core and preventing it from moving outward. When the pressure cover rotates to the set position, the lower groove and the upper groove are aligned one by one, and the steel ball slides back into the positioning hole, thereby releasing the valve core. When air pressure is applied, the valve core moves outward. As the air pressure increases, the outer end of the valve core is eventually inserted into the anti-opening structure.

[0009] The inner circumference of the valve core is provided with two stepped locations, on which the limiting gasket and the valve sealing ring are respectively mounted. The innermost end of the valve core extends outward to form a positioning ring, which engages the end of the limiting gasket. The inner circumference of the valve core is also provided with a second annular protrusion, against which the valve sealing ring abuts the sidewall. The two stepped locations of the inner circumference of the valve core securely mount the limiting gasket and the valve sealing ring, and the second annular protrusion limits the range of movement of the valve sealing ring.

[0010] The outer section of the valve core and the positioning groove form a three-step structure, with the stepped structure expanding from the inner end to the outer end of the valve core. The outer section of the valve core has a three-step structure that expands from the inside to the outside. When air pressure is released outward, it also pushes the three-step structure of the outer section of the valve core outward, adding power.

[0011] The inner diameter of the first annular protrusion is smaller than the diameter of the outermost end of the valve core. The setting of the outermost diameter of the valve core can constrain the outer section of the valve core so that it cannot pass through the through channel in the first annular protrusion, thereby preventing the valve core from falling off and sliding into the pot.

[0012] The concave hole includes a cylindrical hole and a conical hole communicating therewith. The end of the conical hole with a larger diameter penetrates the inner end surface of the valve core and communicates with the pot. The cylindrical hole is located on one side of the interior of the valve core. The concave hole has a cylindrical hole and a conical hole, which can concentrate the air pressure in the concave hole, thereby facilitating the outward movement of the valve core.

[0013] The anti-opening structure is a positioning groove, which is arranged on the inner side of the side ear; when the pressure cover is rotated to the set position and there is air pressure in the pot, the valve core extends outward and is stuck in the positioning groove.

[0014] A positioning ring is mounted within the rim of the pressure cover. The inner wall of the pressure cover is provided with a plurality of ribs that are recessed from the outside of the cover inward, forming protrusions protruding from the inner side of the rim. These ribs press against the lower side of the positioning ring. The positioning ring is positioned above the upper protrusion. The pot mouth sealing ring is clamped between the positioning ring and the top side of the pressure cover rim. When the pressure cover is screwed onto the pot body, the upper side of the lower protrusion presses against the inner side of the lower side of the pot mouth sealing ring. The ribs secure the positioning ring. The positioning ring is provided to secure the pot mouth sealing ring within the space between the positioning ring and the top of the pressure cover rim, preventing it from falling off.

[0015] Compared with the prior art, the advantages of the present invention are: the present device can assist in achieving the sealing function of the pressure cooker or the function of exhausting and relieving pressure in the cooker by screwing the pressure cover; when there is air pressure in the cooker, if the user forgets to open the safety valve (exhaust valve, pressure relief valve) to exhaust air in advance and wants to forcibly unscrew the pressure cover, the anti-misoperation structure of the present device will be locked in the anti-opening structure, and the pressure cover can be stuck, thereby avoiding the occurrence of accidents such as the cover bursting and flying due to improper operation of the user and forcibly opening the cover, thereby reducing the risk of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of the embodiment of the present invention when installed in a pressure cooker;

[0017] Figure 2 A side view of an embodiment of the present invention when installed in a pressure cooker;

[0018] Figure 3 A top view of an embodiment of the present invention when installed in a pressure cooker;

[0019] Figure 4 for Figure 3 Middle AA section view;

[0020] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0021] Figure 6 This is a schematic structural diagram of an anti-misoperation structure according to an embodiment of the present invention;

[0022] Figure 7 This is a three-dimensional diagram of an embodiment of the present invention when installed in a pressure cooker;

[0023] Figure 8 This is a schematic diagram of the structure of the embodiment of the present invention when the pot body and the pot cover are separated from each other from the upper side when the pot body and the pot cover are installed on the pressure cover;

[0024] Figure 9 This is a schematic diagram of the structure of the embodiment of the present invention when the pot body and the pot cover are separated from each other from the bottom side when the pot body and the pot cover are installed on the pressure cover;

[0025] Figure 10 for Figure 3 AA sectional view of the middle anti-misoperation structure when it is stuck by the steel ball;

[0026] Figure 11 for Figure 10 A partial enlarged view of point C in the middle.

[0027] The meanings of the reference numerals in the figure are as follows: 1. pot body; 11. positioning groove; 12. lower protrusion; 13. lower groove; 14. side ear; 2. pressure cover; 21. upper protrusion; 22. upper groove; 23. convex rib; 31. valve sleeve; 311. first annular protrusion; 312. side hole; 32. valve core; 321. positioning groove; 322. concave hole; 33. spring; 34. limiting gasket; 35. valve sealing ring; 36. steel ball; 4. positioning ring; 5. pot mouth sealing ring. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Example

[0030] See Figures 1 to 11 , is an anti-misoperation device for a pressure cooker, which is installed on the pressure cooker. The pressure cooker includes a pot body 1 and a pressure cover 2. The pressure cover 2 is placed on the pot body 1, and a pair of side ears 14 are respectively installed on the side edges of the pot body 1. The anti-misoperation device includes an upper fastening structure, a lower fastening structure, an anti-opening structure and an anti-misoperation structure; the upper fastening structure and the anti-misoperation structure are arranged on the pressure cover 2, the lower fastening structure is arranged on the upper edge of the pot body 1, and the anti-opening structure is arranged on the side ears 14; a pot mouth sealing ring 5 is installed on the inner side of the pressure cover 2; when the pressure cover 2 rotates along the pot body 1, the upper fastening structure and the lower fastening structure are spaced and alternately present in two states of fastening and non-fastening. The lower fastening structure triggers the anti-misoperation structure. When rotated to the set position, the upper fastening structure and the lower fastening structure are in a fastening state. When there is air pressure in the pot, the anti-misoperation structure is triggered and slowly snaps into the anti-opening structure.

[0031] The pressure cover 2 rotates along the pot body 1 to a set position, and the upper fastening structure and the lower fastening structure are in a fastened state, which can keep the pressure cooker in a sealed state; when there is air pressure in the pot, the anti-misoperation structure can assist in deflating; when the pressure in the pot is too high, the anti-misoperation structure is locked into the anti-opening structure to prevent the pressure cover 2 from being opened by mistake, thereby avoiding accidental injuries such as explosion and flying of the cover, thereby improving the safety of the pressure cooker; this device is used to prevent misoperation. When it is actually installed in a pressure cooker, the pressure cooker is usually also equipped with an exhaust valve or a pressure relief valve.

[0032] The lower fastening structure includes a lower protrusion 12 and a lower groove 13. The lower protrusion 12 is formed by the upper edge of the pot body 1 protruding toward the outside of the pot. There are several lower protrusions 12, and lower grooves 13 are formed between adjacent lower protrusions 12; the upper fastening structure includes an upper protrusion 21 and an upper groove 22. The outer periphery of the pressure cover 2 is provided with a cover edge for fastening the pot body 1. The lower inner side of the cover edge protrudes toward the inside of the pot to form an upper protrusion 21. There are several upper protrusions 21, and upper grooves 22 are formed between adjacent upper protrusions 21; the upper protrusion 21 matches the shape of the lower groove 13, and the lower protrusion The shape of the upper groove 22 matches that of the lower protrusion 21. When the pressure cover 2 is placed on the pot body 1, the upper protrusion 21 is aligned with the lower groove 13. By rotating the pressure cover 2, the lower protrusion 12 and the upper protrusion 21 are gradually offset until the lower protrusion 12 is above the upper protrusion 21. This completes the tightening of the pressure cover 2 to the pot body 1. The lower groove 13 and the upper groove 22 are positioned opposite each other, and the anti-misoperation structure is aligned with the anti-opening structure. The anti-misoperation structure is located above the upper groove 22 and is installed on the side wall of the pot mouth sealing ring 5 and the cover edge of the pressure cover 2. The overlap between the protrusions of the pressure cover 2 and the pot body 1 allows the two to be fastened together. During cooking, due to the increase in pressure, the pressure cover 2 and the pot body 1 are fastened more tightly.

[0033] The anti-misoperation structure includes a valve sleeve 31, a valve core 32, a spring 33, a limit gasket 34, a valve sealing ring 35 and a steel ball 36; the valve sleeve 31 is sequentially arranged on the cover edge of the pressure cover 2 and the side wall of the pot mouth sealing ring 5 from the outside to the inside, the interior of the valve sleeve 31 is hollow to form a through channel, the middle part of the through channel bulges inward to form a circle of first annular protrusions 311, and a side hole 312 is opened on one side wall of the first annular protrusion 311, and the side hole 312 connects the through channel with the outside; the valve core 32 is inserted into the through channel of the valve sleeve 31 from the outside to the inside, the side hole 312 is located on the lower side and faces the lower side of the pot mouth sealing ring 5, the lower section of the side hole 312 is concave outward to form a circle of annular groove, the annular groove is provided with a circular groove with a positioning hole on the lower side, the steel ball 36 is placed in the side hole 312, and the bottom of the steel ball 36 Embedded in the positioning hole and located in the space inside the pot, the steel ball 36 has a gap from the top side of the first annular protrusion 311, and the height of the bottom of the steel ball 36 is lower than the height of the upper side of the lower protrusion 12; the outer side of the inner section of the valve core 32 is sequentially sleeved with a valve sealing ring 35 and a limiting gasket 34, and a spring 33 is sleeved on the outer periphery of the valve core 32, one end of which presses against the first annular protrusion 311, and the other end presses against the valve sealing ring 35; a mounting hole is provided on the lower side of the pot mouth sealing ring 5, and a circular groove is embedded in the mounting hole; the inner end surface of the valve core 32 is recessed inward to form a concave hole 322; under normal pressure, the spring 33 presses the valve sealing ring 35 to push out of the pot, and the valve core 32 contracts into the pot; when there is air pressure in the pot, the air pressure flows out from the gap between the limiting gasket 34 and the valve sleeve 31, pushing the valve core 32 to move outward. The first annular protrusion 311 provides support for the spring 33, which exerts an elastic force, constantly pushing the valve core 32 into the pot. A through-channel forms a passage for the valve core 32 to move. A gap exists between the steel ball 36 and the top of the first annular protrusion 311, allowing for a movable distance between the steel ball 36 and the valve core 32. The bottom of the steel ball 36 is lower than the top surface of the lower protrusion 12, allowing the lower protrusion 12 to push the steel ball 36 upward when the pressure cooker rotates, thereby pressing against the valve core 32 and preventing it from moving outward. The recessed hole 322 on the inner end surface of the valve core 32 forms a boost point for air pressure impact, allowing the limit washer 34 and the valve seal 35 to work together to push the valve core 32 outward. The valve core 32 is pushed outward, and when the valve sealing ring 35 is attached to the inner end of the valve sleeve 31, the gap between the inner end of the valve core 32 and the inner end of the valve sleeve 31 can be sealed, so that the air pressure escapes from one side of the steel ball 36, thereby pushing up the steel ball 36 and realizing the exhaust function in the gap between the outer section of the valve core 32 and the outer section of the valve sleeve 31.

[0034] A positioning groove 321 is provided on the outer section of the valve core 32. Under normal pressure, the positioning groove 321 is aligned with the side hole 312. When the pressure cover 2 rotates, the edge of the lower protrusion 12 rotates to above the edge of the upper protrusion 21, the lower protrusion 12 touches the steel ball 36, and the steel ball 36 is lifted and stuck in the positioning groove 321. When the pressure cover 2 rotates to the set position, the valve core 32 is aligned with the anti-opening structure, and the valve sleeve 31 is located above the lower groove 13. When there is air pressure in the pot, the valve core 32 extends outward, the positioning groove 321 is misaligned with the side hole 312, and the outer end of the valve core 32 is inserted into the anti-opening structure. When the pressure cover 2 rotates around the pot body 1, when the steel ball 36 touches the lower protrusion 12, the steel ball 36 will be pushed up and enter the positioning groove 321 from the side hole 312, thereby pressing the valve core 32 and preventing the valve core 32 from moving outward. When the pressure cover 2 rotates to the set position, the lower groove 13 and the upper groove 22 are opposite to each other, and the steel ball 36 slides back into the positioning hole, thereby releasing the valve core 32. When there is air pressure, the valve core 32 moves outward. As the air pressure increases, the outer end of the valve core 32 is finally inserted into the anti-opening structure.

[0035] The inner periphery of the valve core 32 is provided with two stepped locations, on which a limiting gasket 34 and a valve sealing ring 35 are respectively mounted. The innermost end of the valve core 32 extends outward to form a positioning ring 4, which grips the end of the limiting gasket 34. A second annular protrusion is also provided on the inner periphery of the valve core 32, against which the valve sealing ring 35 rests. The two stepped locations on the inner periphery of the valve core 32 securely mount the limiting gasket 34 and the valve sealing ring 35. The second annular protrusion also limits the range of movement of the valve sealing ring 35.

[0036] The outer section of the valve core 32 and the positioning groove 321 form a three-step structure, with the stepped structure expanding from the inner end to the outer end of the valve core 32. This three-step structure expands from the inside outward. When air pressure is released, it also pushes the three-step structure of the outer section of the valve core 32 outward, adding power.

[0037] The inner diameter of the first annular protrusion 311 is smaller than the diameter of the outermost end of the valve core 32. The setting of the outermost diameter of the valve core 32 can constrain the outer section of the valve core 32 so that it cannot pass through the through channel in the first annular protrusion 311, thereby preventing the valve core 32 from falling off and sliding into the pot.

[0038] The concave hole 322 includes a cylindrical hole and a conical hole communicating therewith. The end of the conical hole with a larger diameter penetrates the inner end surface of the valve core 32 and communicates with the interior of the pot. The cylindrical hole is located on one side of the interior of the valve core 32. The concave hole 322 has a cylindrical hole and a conical hole, which can concentrate the air pressure in the concave hole 322, which is conducive to pushing the valve core 32 outward.

[0039] The anti-opening structure is a positioning groove 11, which is provided on the inner side of the side ear 14; when the pressure cover 2 is rotated to the set position and there is air pressure in the pot, the valve core 32 extends outward and is stuck in the positioning groove 11.

[0040] A positioning ring 4 is mounted within the rim of the pressure cover 2. The inner wall of the rim is provided with several ribs 23 that protrude from the outside of the cover toward the inside, forming a depression extending from the inside of the rim. These ribs 23 press against the underside of the positioning ring 4. The positioning ring 4 is positioned above the upper protrusion 21. The pot mouth sealing ring 5 is sandwiched between the positioning ring 4 and the top side of the rim of the pressure cover 2. When the pressure cover 2 is screwed together with the pot body 1, the upper side of the lower protrusion 12 presses against the inner side of the underside of the pot mouth sealing ring 5. The ribs 23 secure the positioning ring 4. The positioning ring 4 is used to secure the pot mouth sealing ring 5 within the space between the positioning ring 4 and the top of the rim of the pressure cover 2, preventing it from falling off.

[0041] Installation of this embodiment:

[0042] 1. Place the steel ball 36 in the side hole 312 in the valve sleeve 31;

[0043] 2. Insert the valve core 32 into the valve sleeve 31 from the outside to the inside;

[0044] 3. Install the spring 33 from the inside out onto the valve core 32;

[0045] 4. Put the valve sealing ring 35 onto the valve core 32;

[0046] 5. Put the limiting gasket 34 onto the valve core 32, and then expand the valve hole outward using the hole expansion process to fix the limiting gasket 34 at the set position of the valve core 32;

[0047] 6. Fix the assembled anti-misoperation structure on the pot mouth sealing ring 5 according to the direction requirements;

[0048] 7. Place the pot mouth sealing ring 5 assembly on the pressure cover 2, and make the hole of the pressure cover 2 concentric with the valve sleeve 31, so that the valve sleeve 31 extends outside the cover;

[0049] 8. Fix the side ear 14 assembly to the designated position of the pot body 1;

[0050] 9. Put the pressure cover 2 assembly on the pot by rotating it according to the set mark and direction.

[0051] Working principle:

[0052] 1. Under normal pressure, the valve core 32 in the anti-misoperation structure retracts into the pot to the set limit position under the force of the spring 33. The steel ball 36 in the valve sleeve 31 drops to the bottom positioning hole of the side hole 312 under the action of gravity;

[0053] 2. When the rotating pressure cover 2 is buckled with or opened on the edge of the pot body 1, the steel ball 36 will rotate along the hollow position of the large side (lower protrusion 12) or the small side (lower groove 13) of the pot body 1;

[0054] 3. During the rotational closing process, when the steel ball 36 reaches the large side (lower bump 12) of the pot body 1, it rises and becomes lodged in the positioning groove 321 of the valve core 32. Before the pot is fully closed, the steel ball 36 remains on the large side (lower bump 12) of the pot body 1. When air pressure builds up inside the pot, the valve core 32 is trapped in the positioning groove 321 by the steel ball 36, preventing it from moving outward. The air pressure inside the pot escapes through the gap between the valve core 32 and the valve sleeve 31, keeping the pressure inside the pot below 5 kPa. This prevents explosions caused by pressure buildup due to the user's careless inability to fully close the pressure cover 2.

[0055] 4. When the pressure cover 2 is fully closed, the steel ball 36 in the valve sleeve 31 drops to the positioning hole at the bottom of the side hole 312 in the hollowed-out position of the small side (lower groove 13) of the pot body 1, separating the steel ball 36 from the positioning groove 321 of the valve core 32. When there is pressure in the pot (higher than 4kPa), the valve core 32 extends outward and gets stuck in the positioning groove 11 set by the side ear 14. When the pressure in the pot is not lower than 4kPa, the valve core 32 will not shrink to normal pressure and will get stuck in the positioning groove 11 of the side ear 14. Because the extended valve core 32 of the pressure cover 2 is stuck in the positioning groove 11 of the side ear 14, the pressure cover 2 cannot be rotated to open. This prevents users from improperly opening the pressure cover 2 when there is still pressure in the pot, causing the pressure cover to fly off.

[0056] In this embodiment, the set position refers to the position where the valve core 32 is aligned with the positioning groove 11; the set limit refers to the position where the valve core 32 is retracted into the pot to an irretractable position under the action of the spring 33. This position is the position of the valve core 32 when the outer section of the valve core 32 is supported by the first annular protrusion and cannot move inward.

[0057] In this embodiment, the principle behind the entire misoperation prevention mechanism is as follows: When the underside of the steel ball 36 presses against the lower projection 12, it engages the positioning groove 321 of the valve core 32, preventing the valve core 32 from moving. This is equivalent to the pressure cover 2 not being fully engaged with the pot body 1, and the steel ball 36 remains on the lower projection 12. Only when the lower projection 12 and the upper projection 21 are fully engaged, the upper groove 22 and the lower groove 13 are aligned, and the steel ball 36 automatically descends under gravity. Once the pressure cover 2 is fully engaged with the pot body 1 and pressure builds up within the pot, the valve core 32 extends outward and engages the positioning groove 11, preventing the pressure cover 2 from rotating or unscrewing.

[0058] In this embodiment, when the pressure cover 2 is not fully secured to the pot body 1, the operating pressure of the anti-misoperation structure does not exceed 5 kPa. When pressure builds up inside the pot, the steel ball 36 is locked in the positioning groove 321 of the valve core 32, preventing the valve core 32 from actuating and moving outward. Gas inside the pot flows out of the pot through the gap between the valve core 32 and the valve sleeve 31, ensuring that the pressure inside the pot does not exceed 5 kPa.

[0059] In this embodiment, when the pressure cover 2 is fully fastened to the pot body 1, the steel ball 36 automatically descends under its own gravity, separating the steel ball 36 from the positioning groove 321 in the valve core 32. When the pressure inside the pot generates air pressure, the valve core 32 begins to extend outward and becomes lodged in the positioning groove 11 of the side ear 14. When the air pressure inside the pot exceeds 5 kPa, the valve core 32 does not automatically retract, ensuring that the valve core 32 is lodged in the positioning groove 11 of the side ear 14, preventing the pot cover from rotating.

[0060] 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 device for preventing misoperation of a pressure cooker, mounted on the pressure cooker, wherein the pressure cooker comprises a pot body and a pressure cover, the pressure cover being placed over the pot body, and a pair of side ears being mounted on opposite sides of the pot body, characterized in that: The anti-misoperation device includes an upper fastening structure, a lower fastening structure, an anti-opening structure and an anti-misoperation structure; the upper fastening structure and the anti-misoperation structure are arranged on the pressure cover, the lower fastening structure is arranged on the pot body along the pot edge, and the anti-opening structure is arranged on the side ear; a pot mouth sealing ring is installed on the inner side of the pressure cover; when the pressure cover rotates along the pot body, the upper fastening structure and the lower fastening structure are spaced apart and alternately present two states of fastening and non-fastening, and the lower fastening structure triggers the anti-misoperation structure. When rotated to the set position, the upper fastening structure and the lower fastening structure are in a fastening state. When there is air pressure in the pot, the anti-misoperation structure is triggered and slowly snaps into the anti-opening structure; The lower fastening structure includes a lower protrusion and a lower groove, the lower protrusion is formed by the pot body along the pot edge protruding toward the outside of the pot, the lower protrusion is provided with a plurality of lower protrusions, and the lower groove is formed between adjacent lower protrusions; the upper fastening structure includes an upper protrusion and an upper groove, the outer periphery of the pressure cover is provided with a cover edge for fastening the pot body, the inner lower part of the cover edge protrudes toward the inside of the pot to form the upper protrusion, the upper protrusion is provided with a plurality of upper protrusions, and the upper groove is formed between adjacent upper protrusions; the upper protrusion matches the shape of the lower groove, and the lower protrusion matches the upper groove. The groove shapes match; when the pressure cover is covered with the pot body, the upper protrusion is aligned with the direction of the lower groove, and by rotating the pressure cover, the lower protrusion and the upper protrusion are gradually offset until the lower protrusion is located above the upper protrusion, that is, the tightening of the pressure cover and the pot body is completed, the lower groove is opposite to the upper groove, and the anti-misoperation structure is aligned with the anti-opening structure; the anti-misoperation structure is located on the upper side of the upper groove, and the anti-misoperation structure is penetrated on the side wall of the pot mouth sealing ring and the cover edge of the pressure cover; The anti-misoperation structure includes a valve sleeve, a valve core, a spring, a limit gasket, a valve member sealing ring and a steel ball; the valve sleeve is sequentially arranged on the cover edge of the pressure cover and the side wall of the pot mouth sealing ring from the outside to the inside, the interior of the valve sleeve is hollow to form a through channel, the middle part of the through channel is convex inward to form a circle of first annular protrusions, and a side hole is provided on one side wall of the first annular protrusion, and the side hole connects the through channel with the outside; the valve core is inserted into the through channel of the valve sleeve from the outside to the inside, the side hole is located on the lower side and faces the lower side of the pot mouth sealing ring, the lower section of the side hole is concave outward to form a circle of annular groove, the annular groove is provided with a circular groove with a positioning hole on the lower side, the steel ball is placed in the side hole, and the bottom of the steel ball is embedded in the positioning hole and Located in the space inside the pot, the steel ball has a gap from the top side of the first annular protrusion, and the height of the bottom of the steel ball is lower than the height of the upper side of the lower protrusion; the valve component sealing ring and the limiting gasket are sequentially sleeved on the outside of the inner section of the valve core, and the spring is sleeved on the outer periphery of the valve core, one end of which presses against the first annular protrusion, and the other end presses against the valve component sealing ring; a mounting hole is provided on the lower side of the pot mouth sealing ring, and the circular groove is embedded in the mounting hole; the inner end surface of the valve core is concave inward to form a concave hole; under normal pressure, the spring presses the valve component sealing ring out of the pot, and the valve core contracts into the pot; when there is air pressure in the pot, the air pressure flows out from the gap between the limiting gasket and the valve sleeve, pushing the valve core to move outward.

2. The anti-misoperation device for a pressure cooker according to claim 1, characterized in that: A positioning groove is provided on the outer section of the valve core. Under normal pressure, the positioning groove is aligned with the side hole. When the pressure cover rotates, the edge of the lower protrusion rotates to above the edge of the upper protrusion, the lower protrusion touches the steel ball, and the steel ball is lifted up and stuck in the positioning groove. When the pressure cover rotates to the set position, the valve core is aligned with the anti-opening structure, and the valve sleeve is located above the lower groove. When there is air pressure in the pot, the valve core extends outward, the positioning groove is misaligned with the side hole, and the outer end of the valve core is inserted into the anti-opening structure.

3. The anti-misoperation device for a pressure cooker according to claim 1, characterized in that: Two stepped positions are provided on the outer periphery of the inner section of the valve core, and the limiting gasket and the valve component sealing ring are respectively mounted on the two stepped positions. The innermost end of the valve core extends outward to form a positioning ring, and the positioning ring buckles the end of the limiting gasket; a second annular protrusion is also provided on the outer periphery of the inner section of the valve core, and the valve component sealing ring presses against the side wall of the second annular protrusion.

4. The anti-misoperation device for a pressure cooker according to claim 2, characterized in that: The outer section of the valve core and the positioning groove form a three-level stepped structure, and the stepped structure from the inner end to the outer end of the valve core is an expanding diameter structure.

5. The anti-misoperation device for a pressure cooker according to claim 4, characterized in that: The inner diameter of the first annular protrusion is smaller than the diameter of the outermost end of the valve core.

6. The anti-misoperation device for a pressure cooker according to claim 1, characterized in that: The concave hole includes a cylindrical hole and a conical hole communicating therewith. The end of the conical hole with a larger diameter passes through the inner end surface of the valve core and communicates with the pot. The cylindrical hole is located on one side of the inner part of the valve core.

7. The anti-misoperation device for a pressure cooker according to claim 1, characterized in that: The anti-opening structure is a positioning groove, which is arranged on the inner side of the side ear; when the pressure cover is rotated to the set position and there is air pressure in the pot, the valve core extends outward and is stuck in the positioning groove.

8. The anti-misoperation device for a pressure cooker according to claim 1, characterized in that: A positioning ring is installed inside the cover edge of the pressure cover, and the inner wall of the pressure cover edge is provided with a plurality of convex ribs which are recessed from the outside of the cover to the inside of the cover to form convex ribs protruding from the inner side of the cover edge, and the plurality of convex ribs press against the lower side surface of the positioning ring; the positioning ring is located above the upper protrusion, and the pot mouth sealing ring is clamped between the positioning ring and the top side of the pressure cover edge. When the pressure cover is screwed together with the pot body, the upper side of the lower protrusion presses against the inner side of the lower side surface of the pot mouth sealing ring.

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