CN218105574U - Anti-misoperation safety device for pressure cooker - Google Patents

Abstract

The utility model discloses an anti-misoperation safety device for a pressure cooker, which is arranged on the pressure cooker, wherein the pressure cooker comprises a cooker body and a pressure cover, the anti-misoperation safety device comprises an upper buckling device, a lower buckling device and an anti-misoperation triggering safety device, the upper buckling device and the anti-misoperation triggering safety device are arranged on the pressure cover, and the lower buckling device is arranged on the cooker body along the cooker edge; the inner side of the pressure cover is provided with a sealing ring, and when the pressure cover and the cooker body rotate, the lower buckling device triggers the anti-misoperation triggering safety device to extrude or loosen the sealing ring. The device can realize the sealing function of the pressure cooker or realize the functions of exhausting and relieving pressure in the cooker; when air pressure exists in the cooker, if the pressure cover is rotated to be opened forcibly, the sealing ring is extruded and deformed to exhaust rapidly under the hard action of the second cam and the first convex position, and the accident that the cover of the explosion cover flies is avoided.

Description

Anti-misoperation safety device for pressure cooker

Technical Field

The utility model relates to a kitchen cooking utensil technical field especially relates to a prevent maloperation safety device for pressure cooker.

Background

In the market, some pressure cookers are easy to be in a half-open state with a cover, so that the cooker and the cover can not be buckled, and the pressure in the cooker is leaked; or the fire power is not turned off in time because the pressure in the cooker is too high during the cooking, thereby causing safety accidents. When the pressure cooker is used, a user can directly open the pressure cover without paying attention to whether pressure exists in the cooker, so that the cover is exploded and flies.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects of the prior art and providing a safety device for preventing misoperation for a pressure cooker.

The utility model discloses a realize through following technical scheme: an anti-misoperation safety device for a pressure cooker is installed on the pressure cooker, the pressure cooker comprises a cooker body and a pressure cover, the pressure cover is covered above the cooker body, the anti-misoperation safety device comprises an upper buckling device, a lower buckling device and an anti-misoperation triggering safety device, the upper buckling device and the anti-misoperation triggering safety device are arranged on the pressure cover, and the lower buckling device is arranged on the cooker body along the cooker edge; a sealing ring is arranged on the inner side of the pressure cover, and when the pressure cover and the pot body rotate, the lower buckling device triggers the misoperation prevention triggering safety device to extrude or loosen the sealing ring; when the pressure cover rotates to the buckling position of the upper buckling device and the lower buckling device, the misoperation preventing triggering safety device loosens the sealing ring, and the pressure cooker is in a closed state; the pressure lid rotates to go up the lock device with when lock device phase separation position down, prevent maloperation and trigger safety device extrusion the sealing washer, the pressure cooker is in the pressure release state of exhausting.

When the upper buckling device and the lower buckling device are in the buckling position, the pressure cooker can be in a closed state; lower lock device prevents maloperation through triggering and triggers safety device and extrudees or unclamp the sealing washer to the realization is to the airtight or the exhaust pressure release function of pressure lid, when rotatory uncapping by force, prevents maloperation and triggers safety device and can extrude the sealing washer, realizes quick exhaust function, thereby improves pressure cooker's security.

The lower buckling device comprises a first convex position and a first concave position, the first convex position is formed by outward bulge of the pot body along the pot edge, the number of the first convex positions is multiple, and the first concave position is formed between every two adjacent first convex positions; the upper buckling device comprises a second convex position and a second concave position, the periphery of the pressure cover is provided with a cover edge used for buckling the pot body, the lower part of the inner side of the cover edge protrudes inwards to form the second convex position, the second convex position is provided with a plurality of second convex positions, and the second concave position is formed between the adjacent second convex positions; the second convex position is matched with the first concave position in shape; when the pressure cover covers the pot body, the second convex position is aligned with the first concave position and put down, the first convex position and the second convex position are gradually misplaced until the first convex position is positioned above the second convex position by rotating the pressure cover, and then the pressure cover is screwed with the pot body, and the first concave position is opposite to the second concave position; when the pressure cover needs to be opened, the pressure cover can be opened by rotating the pressure cover to enable the second convex position to be opposite to the first concave position. The pressure cover and the cooker body can be buckled through the overlapping between the convex positions of the pressure cover and the cooker body, and the pressure cover and the cooker body are buckled more tightly due to the increase of pressure during cooking.

The anti-misoperation triggering safety device comprises a v-shaped box, a swinging piece and a fixed shaft; the cover edge of the pressure cover is provided with a long hole, the swinging piece is arranged on the fixed shaft in a penetrating manner, two ends of the fixed shaft are respectively arranged at the upper side and the lower side of the 212748-shaped box, and the swinging piece is positioned in the 21274-shaped box; two sides of the swinging piece respectively protrude towards the center of the pressure cover to form a first cam and a second cam, the first cam is positioned at the upper end of the swinging piece, and the second cam is positioned at the lower end of the swinging piece; the \ 21274is installed on the pressure cover edge at the periphery of the elongated hole, and the first cam and the second cam are positioned in the elongated hole; after the pressure cover is covered, the pressure cover is rotated, the second cam moves from a first concave position to a first convex position along the edge of the pan, when the second cam moves to the first convex position, the swinging piece rotates under the action of the fixed shaft, and the first cam extrudes the sealing ring to deform the sealing ring; when the pressure cover is completely buckled with the pot body, the second cam is positioned in the first concave position, and the first cam is restored to the state that the sealing ring cannot be touched; when air pressure exists in the cooker, the pressure cover is forcibly rotated, and the first cam extrudes the sealing ring to deform and exhaust the air under the hard action of the second cam and the first convex position. The fixed shaft provides the pivoted fulcrum that sways for rocking the piece, and the vertical height of first cam is higher than the second cam, and the second cam is used for realizing touching with first protruding position, forces the second cam to extrude first protruding position outer fringe and removes for first cam stretches out inwards and extrudes the sealing washer, thereby makes the sealing washer warp, realizes the exhaust pressure release function, avoids appearing exploding the phenomenon that the lid flies to cover. When the second cam slides to the first concave position, the second cam is separated from the first convex position, so that the first cam is reset, the sealing ring is not extruded any more, and the pressure cooker recovers the pressure maintaining state.

The v-shaped box 21274comprises a box body and a box cover, wherein an accommodating cavity is formed in the box body, and the swinging piece is positioned in the accommodating cavity; the bottom of the box body is provided with a lower positioning hole, and the lower side surface of the box cover is provided with an upper positioning hole; swing the piece from top to bottom and put into the intracavity that holds of box body, the fixed axle lower extreme inserts in the lower locating hole, the lid is put and is fixed the box body upside, the fixed axle upper end inserts in the upper locating hole, the box body passes through the bolt fastening and is in the lid edge of pressure lid is last. The upper positioning hole and the lower positioning hole are arranged, so that the fixing shaft can be fixed, and the swinging piece is provided with a rotating fulcrum.

The top of the box body is provided with a mounting groove which is communicated with the accommodating cavity; the lid embedding in the mounting groove, the lid downside is pushing up mounting groove inner wall, the lid top with box body top edge parallel and level. The box cover is embedded into the mounting groove, and the top of the box cover is flush with the top of the box body, so that the exterior structure of the box is smooth and attractive.

The first lug is of a semicircular structure with an arc shape, and the protruding part of the semicircular structure faces the center of the pressure cover; the second bump is of a semicircular structure with a circular arc shape, and the protruding part of the semicircular structure faces the center of the pressure cover. The first lug has a circular arc semicircular structure, so that the first lug and the sealing ring are extruded to have smooth transition, and the sealing ring cannot be abraded. The second convex block has a circular arc semicircular structure, so that the second convex block and the first convex position slide smoothly.

The first lug and the middle part of the swinging part are provided with a first inclined surface inclining downwards; the second bump and the middle part of the swing piece are provided with a second inclined surface inclining upwards.

The v-shaped box 21274is arranged on the pressure cover edge on the upper side of the second concave position, and one end of the elongated hole is close to one side of the second convex position. The position of the shape box and the elongated hole can be known through the shape box, so that the rotation of the pressure cooker can be adjusted conveniently, and the cover and the box cover can be opened conveniently.

Compared with the prior art, the utility model has the advantages of: the device can realize the sealing function of the pressure cooker or realize the functions of air exhaust and pressure relief in the cooker through the screwing of the pressure cooker; when air pressure exists in the cooker, if the safety valve is forgotten to be opened to exhaust air in advance and the pressure cover is rotated to be opened forcibly, the sealing ring is extruded and deformed to exhaust air rapidly under the hard action of the second cam and the first convex position of the device, the accident that the cover is blown off by explosion is avoided, and the use risk is reduced.

Drawings

FIG. 1 is a schematic structural view of the pressure cooker according to the embodiment of the present invention;

FIG. 2 is a top view of the embodiment of the present invention when installed in a pressure cooker;

FIG. 3 isbase:Sub>A sectional view taken along line A-A of FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 3 at B;

FIG. 5 is a top view of an embodiment of the present invention in cooperation with a pressure cap;

FIG. 6 is a sectional view taken along line C-C of FIG. 4;

FIG. 7 is an exploded view of the pressure cooker according to the embodiment of the present invention when the pressure cooker is mounted on the pressure cover;

fig. 8 is an exploded view of the embodiment of the present invention when mounted on a pressure cap;

fig. 9 is a schematic structural view of a pressure cover according to an embodiment of the present invention;

fig. 10 is a schematic structural view of the pressure cover according to the embodiment of the present invention after the sealing ring is removed;

FIG. 11 is a schematic structural view of the pot body, the sealing ring and the swinging member of the embodiment of the present invention when they are displayed together;

FIG. 12 is a schematic structural view of the pot body and the swinging member shown together in the embodiment of the present invention;

fig. 13 is a bottom view of the pot body in accordance with the embodiment of the present invention;

fig. 14 is a schematic structural diagram of the safety device triggered by misoperation prevention according to the embodiment of the present invention;

fig. 15 is an exploded view of the safety device of the embodiment of the present invention;

fig. 16 is an exploded view of the safety device for preventing the misoperation in the other direction according to the embodiment of the present invention.

The reference numerals in the drawings mean: 1. a pot body; 11. a first convex position; 12. a first concave position; 2. a pressure cap; 21. a second convex position; 22. a second concave position; 23. a long hole; 31. \ 21274; 311. a box body; 312. a box cover; 313. an accommodating chamber; 314. a lower positioning hole; 315. an upper positioning hole; 316. mounting grooves; 32. a rocking member; 321. a first cam; 322. a second cam; 33. a fixed shaft; 4. and (5) sealing rings.

Detailed Description

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

Examples

Referring to fig. 1 to 16, the safety device for preventing misoperation for the pressure cooker is installed on the pressure cooker, the pressure cooker comprises a cooker body 1 and a pressure cover 2, the pressure cover 2 is covered on the cooker body 1, the safety device for preventing misoperation comprises an upper buckling device, a lower buckling device and a safety device for triggering misoperation prevention, the upper buckling device and the safety device for triggering misoperation prevention are arranged on the pressure cover 2, and the lower buckling device is arranged on the cooker body 1 along the cooker edge; a sealing ring 4 is arranged on the inner side of the pressure cover 2, and when the pressure cover 2 and the pot body 1 rotate, the lower buckling device triggers the misoperation preventing triggering safety device to extrude or loosen the sealing ring 4; when the pressure cover 2 rotates to the buckling position of the upper buckling device and the lower buckling device, the misoperation prevention triggers the safety device to loosen the sealing ring 4, and the pressure cooker is in a closed state; when the pressure cover 2 rotates to the position where the upper buckling device is separated from the lower buckling device, the misoperation prevention triggers the safety device to extrude the sealing ring 4, and the pressure cooker is in an exhaust and pressure relief state.

When the upper buckling device and the lower buckling device are in the buckling position, the pressure cooker can be in a closed state; lower lock device prevents maloperation through triggering and triggers safety device and extrudees or unclamp sealing washer 4 to the realization is to the airtight or the exhaust pressure release function of pressure lid 2, when rotatory uncapping by force, prevents maloperation and triggers safety device and can extrude sealing washer 4, realizes quick exhaust function, thereby improves pressure cooker's security.

The lower buckling device comprises first convex positions 11 and first concave positions 12, the first convex positions 11 are formed by outwards protruding the upper edge of the pot body 1 along the pot edge, a plurality of first convex positions 11 are arranged, and the first concave positions 12 are formed between every two adjacent first convex positions 11; the upper buckling device comprises second convex positions 21 and second concave positions 22, the periphery of the pressure cover 2 is provided with a cover edge used for buckling the cooker body 1, the lower part of the inner side of the cover edge is inwards protruded and extended to form the second convex positions 21, the second convex positions 21 are provided with a plurality of second convex positions, and the second concave positions 22 are formed between the adjacent second convex positions 21; the shape of the second convex position 21 is matched with that of the first concave position 12; when the pressure cover 2 covers the pot body 1, the second convex position 21 is aligned with the first concave position 12 and is placed down, the first convex position 11 and the second convex position 21 are gradually placed in a staggered mode until the first convex position 11 is positioned above the second convex position 21 by rotating the pressure cover 2, so that the pressure cover 2 and the pot body 1 are screwed, and the first concave position 12 is opposite to the second concave position 22; when the pressure cover 2 needs to be opened, the pressure cover 2 can be opened by rotating the pressure cover 2 to enable the second convex position 21 to be opposite to the first concave position 12. The pressure cover 2 and the cooker body 1 can be buckled through the overlapping between the convex positions of the pressure cover 2 and the cooker body 1, and the pressure cover 2 and the cooker body 1 are buckled more tightly due to the increase of pressure during cooking. In this embodiment, a ring and a plurality of clamping members for clamping the ring are arranged in the cover edge of the pressure cover 2, the ring is located on the lower side of the sealing ring 4 and pushes against the sealing ring 4, and the sealing ring 4 is prevented from sliding off.

The anti-misoperation triggering safety device comprises a v-shaped box 31, a swinging piece 32 and a fixed shaft 33; the cover edge of the pressure cover 2 is provided with a long hole 23, the swinging piece 32 is arranged on a fixed shaft 33 in a penetrating way, two ends of the fixed shaft 33 are respectively arranged at the upper side and the lower side of the box 31, and the swinging piece 32 is positioned in the box 31; two sides of the rocking piece 32 respectively protrude towards the center of the pressure cover 2 to form a first cam 321 and a second cam 322, wherein the first cam 321 is positioned at the upper end of the rocking piece 32, and the second cam 322 is positioned at the lower end of the rocking piece 32; the shaped box 31 is arranged on the cover edge of the pressure cover 2 at the periphery of the elongated hole 23, and the first cam 321 and the second cam 322 are positioned in the elongated hole 23; after the pressure cover 2 is closed, the pressure cover 2 is rotated, the second cam 322 moves from the first concave position 12 to the first convex position 11 along the edge of the pan, when the second cam 322 moves to the first convex position 11, under the action of the fixed shaft 33, the swinging piece 32 rotates, and the first cam 321 extrudes the sealing ring 4 to deform the sealing ring; when the pressure cover 2 is completely buckled with the pot body 1, the second cam 322 is positioned in the first concave position 12, and the first cam 321 is restored to the state that the sealing ring 4 cannot be touched; when air pressure exists in the cooker, the pressure cover 2 is rotated strongly, and the first cam 321 presses the sealing ring 4 to deform and exhaust air under the hard action of the second cam 322 and the first convex position 11. The fixed shaft 33 provides a rotation pivot for the swinging of the swinging member 32, the vertical height of the first cam 321 is higher than that of the second cam 322, and the second cam 322 is used for contacting with the first convex position 11 to force the second cam 322 to extrude the outer edge of the first convex position 11 to move, so that the first cam 321 extends inwards to extrude the sealing ring 4, thereby deforming the sealing ring 4, realizing the functions of exhausting and relieving pressure, and avoiding the phenomenon of cover explosion and cover flying. When the second cam 322 slides to the first concave position 12, the second cam 322 is separated from the first convex position 11, so that the first cam 321 is reset, the sealing ring 4 is no longer pressed, and the pressure cooker recovers the pressure maintaining state.

The box 31 comprises a box body 311 and a box cover 312, wherein the box body 311 is internally provided with an accommodating cavity 313, and the swinging piece 32 is positioned in the accommodating cavity 313; the bottom of the box body 311 is provided with a lower positioning hole 314, and the lower side surface of the box cover 312 is provided with an upper positioning hole 315; the swing member 32 is placed from the top to the bottom in the receiving cavity 313 of the case body 311, the lower end of the fixing shaft 33 is inserted into the lower positioning hole 314, the case cover 312 is placed and fixed on the upper side of the case body 311, the upper end of the fixing shaft 33 is inserted into the upper positioning hole 315, and the case body 311 is fixed on the cover edge of the pressure cap 2 by bolts. The upper positioning hole 315 and the lower positioning hole 314 are disposed to fix the fixing shaft 33, so that the rocking member 32 has a pivot.

The top of the box body 311 is provided with a mounting groove 316, and the mounting groove 316 is communicated with the accommodating cavity 313; the cover 312 is inserted into the mounting groove 316, the lower side of the cover 312 is pressed against the inner wall of the mounting groove 316, and the top of the cover 312 is flush with the top edge of the case 311. The cover 312 is inserted into the mounting groove 316, and the top of the cover is flush with the top of the case body 311, so that the exterior structure of the box 31 is smooth and beautiful.

The first lug is of a semicircular structure with an arc shape, and the protruding part of the semicircular structure faces the center of the pressure cover 2; the second bump is of a semicircular structure with a circular arc shape, and the protruding part of the semicircular structure faces the center of the pressure cover 2. The first lug has a circular arc semicircular structure, so that the first lug and the sealing ring 4 are extruded to have smooth transition, and the sealing ring 4 cannot be abraded. The second convex block has a circular arc semicircular structure, so that the second convex block and the first convex position 11 slide smoothly.

The middle parts of the first lug and the swing piece 32 are provided with a first inclined surface inclining downwards; the second protrusion and the middle part of the swing member 32 have a second inclined surface inclined upward.

The box 31 is arranged on the cover edge of the pressure cover 2 at the upper side of the second concave position 22, and one end of the elongated hole 23 is close to one side of the second convex position 21. The positions of the shape box 31 and the elongated hole 23 are known through the shape box 31, so that the rotation of the pressure cooker is convenient to adjust, and the cover and the box cover 312 are convenient to open.

Installation of this implementation: swing member 32 is secured within a cradle 31 and the installed safety device to prevent inadvertent operation is secured to the side of pressure cap 2 so that swing member 32 is received within elongated aperture 23.

The working principle of the embodiment is as follows:

(1) When the pressure cover 2 is rotated, the second cam 322 of the swing member 32 moves along the first convex position 11 from the first concave position along the edge of the pot on the pot body 1, and when the first cam 321 of the swing member 32 moves to the first convex position 11, the swing member 32 rotates counterclockwise under the action of the fixing shaft 33, and at this time, the first cam 321 of the swing member 32 presses the sealing ring 4 to deform, so that the sealing function cannot be achieved. First cam 321 extrudes sealing washer 4 and makes it warp, and this effect can extrude sealing washer 4 when the maloperation uncaps to realize exhaust pressure release, avoid a kind of deep pot to cover the condition of flying the lid.

(2) When the pressure cover 2 and the pot body 1 are completely closed, the second cam 322 of the swing member 32 just moves to the first concave position of the pot body 1, at this time, under the action of the elastic force of the sealing ring 4, the first cam 321 of the swing member 32 returns to the state of not touching the sealing ring 4, and the sealing ring 4 can be normally sealed for use.

When the pressure cover 2 and the pot body 1 are not closed completely, the second cam 322 of the swing piece 32 is also arranged on the first convex position 11 of the pot body 1, so that the sealing ring 4 can not be completely sealed and can not be pressurized.

When air pressure exists in the cooker, if the pressure cover 2 is rotated to be opened by strong force, the sealing ring 4 is extruded and deformed to exhaust quickly under the hard action of the second cam 322 of the swing piece 32 and the first convex position 11 at the edge of the cooker body 1, and the cover explosion and cover flying accidents are avoided.

The above detailed description is directed to a specific example of a possible embodiment of the present invention, which is not intended to limit the scope of the invention, but rather, all equivalent implementations or modifications not departing from the scope of the invention are intended to be included within the scope of the present invention.

Claims (8)

1. The utility model provides a prevent maloperation safety device for pressure cooker installs on pressure cooker, and pressure cooker includes pot body and pressure lid, the pressure lid put pot body top, its characterized in that: the anti-misoperation safety device comprises an upper buckling device, a lower buckling device and an anti-misoperation triggering safety device, wherein the upper buckling device and the anti-misoperation triggering safety device are arranged on the pressure cover, and the lower buckling device is arranged on the upper edge of the pot body; a sealing ring is arranged on the inner side of the pressure cover, and when the pressure cover and the pot body rotate, the lower buckling device triggers the misoperation prevention triggering safety device to extrude or loosen the sealing ring; when the pressure cover rotates to the buckling position of the upper buckling device and the lower buckling device, the misoperation preventing triggering safety device loosens the sealing ring, and the pressure cooker is in a closed state; the pressure lid rotates to go up the lock device with when lock device phase separation position down, prevent maloperation and trigger safety device extrusion the sealing washer, the pressure cooker is in the pressure release state of exhausting.

2. The safety device for pressure cooker against erroneous operation according to claim 1, wherein: the lower buckling device comprises a first convex position and a first concave position, the first convex position is formed by outward bulge of the pot body along the pot edge, the number of the first convex positions is multiple, and the first concave position is formed between every two adjacent first convex positions; the upper buckling device comprises second convex positions and second concave positions, a cover edge used for buckling the pot body is arranged on the periphery of the pressure cover, the cover edge protrudes inwards along the lower part of the inner side to form the second convex positions, the number of the second convex positions is multiple, and the second concave positions are formed between every two adjacent second convex positions; the second convex position is matched with the first concave position in shape; when the pressure cover covers the pot body, the second convex position is aligned with the first concave position and put down, the first convex position and the second convex position are gradually misplaced until the first convex position is positioned above the second convex position by rotating the pressure cover, and then the pressure cover is screwed with the pot body, and the first concave position is opposite to the second concave position; when the pressure cover needs to be opened, the pressure cover can be opened by rotating the pressure cover to enable the second convex position to be opposite to the first concave position.

3. The safety device for pressure cooker against erroneous operation according to claim 2, wherein: the misoperation prevention triggering safety device comprises a rectangular box, a swinging piece and a fixed shaft; the cover edge of the pressure cover is provided with a long hole, the swinging piece is arranged on the fixed shaft in a penetrating manner, two ends of the fixed shaft are respectively arranged at the upper side and the lower side of the 212748-shaped box, and the swinging piece is positioned in the 21274-shaped box; two sides of the swinging piece respectively protrude towards the center of the pressure cover to form a first cam and a second cam, the first cam is positioned at the upper end of the swinging piece, and the second cam is positioned at the lower end of the swinging piece; the v-shaped box is arranged on the pressure cover edge at the periphery of the elongated hole, and the first cam and the second cam are positioned in the elongated hole; after the pressure cover is closed, the pressure cover is rotated, the second cam moves from a first concave position to a first convex position along the pot edge, when the second cam moves to the first convex position, the swinging piece rotates under the action of the fixed shaft, and the first cam extrudes the sealing ring to deform the sealing ring; when the pressure cover is completely buckled with the pot body, the second cam is positioned in the first concave position, and the first cam is restored to the state that the sealing ring cannot be touched; when air pressure exists in the cooker, the pressure cover is rotated forcibly, and the first cam extrudes the sealing ring to deform and exhaust under the hard action of the second cam and the first convex position.

4. The safety device against erroneous operation for pressure cookers of claim 3, characterized in that: the v-shaped box 21274comprises a box body and a box cover, wherein an accommodating cavity is formed in the box body, and the swinging piece is positioned in the accommodating cavity; the bottom of the box body is provided with a lower positioning hole, and the lower side surface of the box cover is provided with an upper positioning hole; swing the piece from top to bottom and put into the intracavity that holds of box body, the fixed axle lower extreme inserts in the lower locating hole, the lid is put and is fixed the box body upside, the fixed axle upper end inserts in the upper locating hole, the box body passes through the bolt fastening and is in the lid edge of pressure lid is last.

5. The safety device for pressure cooker against erroneous operation according to claim 4, wherein: the top of the box body is provided with a mounting groove which is communicated with the accommodating cavity; the lid embedding in the mounting groove, the lid downside is pushing up the mounting groove inner wall, the lid top with box body top edge parallel and level.

6. A safety device against incorrect operation for a pressure cooker according to claim 3, characterized in that: the first lug is of a semicircular structure with an arc shape, and the protruding part of the semicircular structure faces the center of the pressure cover; the second bump is of a semicircular structure with a circular arc shape, and the protruding part of the semicircular structure faces the center of the pressure cover.

7. A safety device against incorrect operation for a pressure cooker according to claim 3, characterized in that: the first lug and the middle part of the swinging part are provided with a first inclined surface inclining downwards; the second lug and the middle part of the swinging part are provided with a second inclined surface inclining upwards.

8. The safety device against erroneous operation for pressure cookers of claim 3, characterized in that: the rectangular box is arranged on the pressure cover edge on the upper side of the second concave position, and one end of the elongated hole is close to one side of the second convex position.

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