CN107647771B - Pressure cooker - Google Patents

Abstract

The invention provides a pressure cooker which comprises a cooker body and a cooker cover, wherein the cooker cover is provided with an exhaust hole and a pressure relief valve, the pressure relief valve is arranged on the exhaust hole, the pressure cooker is also provided with a pressure relief driving device used for driving the pressure relief valve to be at least partially separated from the exhaust hole, a switch device used for controlling the pressure relief driving device and a switch resetting device capable of enabling the switch device to be switched from a closed state to an open state. According to the invention, by arranging the pressure relief driving device, the switch device and the switch reset device, a pressure relief function can be realized by shifting the switch device when a user uses the pressure relief device, and meanwhile, the reset of the switch device can be automatically realized in the process of opening the cover, so that the situation that the user forgets to turn on the switch device is prevented.

Description

Pressure cooker

Technical Field

The invention relates to a cooking device, in particular to an electric pressure cooker.

Background

At present, after food is cooked, the pressure in the pot is very high in a common electric pressure cooker on the market, a safety floater is arranged on the pot cover and ascends to penetrate through a push rod through hole in a push rod, the push rod through hole cannot move horizontally in the radial direction, and the pot cover cannot be opened at the moment, so that the safety protection effect is achieved. However, if the user wants to add some seasoning during the cooking process or wants to open the lid quickly after cooking, the user must manually exhaust the food because the time for naturally cooling and depressurizing is very long.

At present, manual exhaust generally adopts the following modes:

when the hand leaves, the gravity valve contacts with the sealing end face of the exhaust pipe under the action of gravity and is in a sealing state, the exhaust mode is unsafe, the sprayed steam easily scalds the hand, and the air can be exhausted only by pressing the button all the time.

Disclosure of Invention

The invention provides the pressure cooker which is high in safety and convenient to relieve pressure in order to overcome at least one defect in the prior art.

In order to solve the technical problems, the invention adopts the technical scheme that:

a pressure cooker comprises a cooker body and a cooker cover, wherein an exhaust hole and a pressure relief valve are arranged on the cooker cover, the pressure relief valve is arranged on the exhaust hole, the pressure cooker is further provided with a pressure relief driving device used for driving the pressure relief valve to be at least partially separated from the exhaust hole, a switch device used for controlling the pressure relief driving device and a switch reset device capable of enabling the switch device to be converted into an open state from a closed state.

The pressure relief driving device comprises a pressure lever, one end of the pressure relief lever is a supporting end and is arranged below the pressure relief valve, the other end of the pressure relief lever is a pressure relief stressed end, and a pressure relief fulcrum is arranged between the supporting end and the pressure relief stressed end.

The pressure relief stress end is provided with a pressure relief concave position and a pressure relief convex position, and the switch device is provided with a pressure relief convex column capable of applying downward pressure to the pressure relief convex position.

The pressure relief driving device is further provided with a pressure relief elastic piece capable of enabling the supporting end to move downwards.

A locking device which can lock the pot cover when the pot cover is completely covered is also arranged between the pot body and the pot cover.

The locking device comprises a bolt device and a stopping device, and when the pot cover is in a complete covering state, the bolt device prevents the pot cover from rotating relative to the pot body under the limit of the stopping device.

The bolt device is arranged on the pot cover, and the stop device is arranged on the pot body.

The bolt device comprises a bolt connecting rod, one end of the bolt connecting rod is provided with a bolt head, the other end of the bolt connecting rod is a bolt stressed end, and a bolt fulcrum is arranged between the bolt head and the bolt stressed end.

The pressure cooker comprises a pressure cooker body, a bolt head, a stopping device and a pressure cooker cover, wherein the bolt head is columnar, the stopping device is in a hole shape or a bulge capable of limiting the bolt head, a middle ring is arranged on the pressure cooker body, and the stopping device is arranged on the middle ring.

The locking device is also provided with a first elastic element which can drive the bolt head to move towards the stop device.

The switch device is acted with the bolt stress end, when the switch device is in an opening state, the switch device exerts downward acting force on the bolt stress end to enable the bolt head to move towards the direction away from the stop device, and when the switch device is in a closing state, the bolt head moves towards the direction close to the stop device under the action of the first elastic piece.

The bolt stressed end comprises a bolt concave position and a bolt convex position, the switch device is provided with a locking convex column, when the switch device is in a closed state, the locking convex column exerts downward acting force on the bolt convex position of the bolt stressed end, and when the switch device is in an open state, the locking convex column is positioned at the bolt concave position of the bolt stressed end.

The pressure cooker pot body still is equipped with the heat preservation cover, and the heat preservation cover is outer along including big round edge and little round edge, switch resetting means includes the push rod, and the one end of push rod is equipped with the push rod head, and the other end is equipped with the pull-back device, switching device is last to be equipped with the connecting piece that corresponds with the pull-back device, under the complete lid of pot cover closed state, the push rod head is located little round edge position, and the pot cover is at the in-process of opening, the push rod head slides to big round edge by little round edge to pull switching device through the pull-back device and remove.

The pull-back device is a square hole, and the connecting piece comprises an extension arm and a connecting column which is arranged on the extension arm and can be inserted into the square hole.

According to the invention, by arranging the pressure relief driving device, the switch device and the switch reset device, a pressure relief function can be realized by shifting the switch device when a user uses the pressure relief device, and meanwhile, the reset of the switch device can be automatically realized in the process of opening the cover, so that the situation that the user forgets to turn on the switch device is prevented.

Drawings

FIG. 1 is an exploded view of the lid of the present invention;

FIG. 2 is a schematic view of the structure of the lid liner assembly of the present invention;

FIG. 3 is a schematic structural view of the pot body of the present invention;

FIG. 4 is a schematic view of the construction of the locking device of the present invention;

FIG. 5 is a schematic view of the switchgear of the present invention;

FIG. 6 is a schematic diagram of the switch reset apparatus of the present invention;

FIG. 7 is a schematic view of a pressure relief driving device according to the present invention;

FIG. 8 is a schematic structural view showing an initial closing position of the lid of the present invention;

fig. 9 isbase:Sub>A sectional view ofbase:Sub>A portion of the switch resetting means, i.e.,base:Sub>A-base:Sub>A' in fig. 8, in the initial position of closing the lid of the pot according to the present invention;

fig. 10 is a sectional view of a locking means portion, i.e., B-B' in fig. 8, in an initial position of closing the lid of the pot cover in accordance with the present invention;

FIG. 11 is a sectional view of a portion of the pressure-releasing driving means of the lid of the initial closing position of the lid of the present invention;

fig. 12 is a schematic structural view of the lid of the present invention in a completely closed state (i.e., in a sealed state);

fig. 13 is a sectional view of a portion of the switch resetting means, i.e., E-E' in fig. 8, in a state where the pot lid is completely closed according to the present invention;

figure 14 is a cross-sectional view of the locking means portion, i.e., F-F' in figure 8, in the fully closed condition of the lid according to the present invention;

fig. 15 is a sectional view of a pressure-releasing driving means portion in a state where the lid is completely closed according to the present invention;

fig. 16 is a sectional view of a portion of the switch reset means in a state where the lid is completely closed and the switch means is in a closed state in accordance with the present invention;

fig. 17 is a sectional view of a locking means portion in a state where the lid of the present invention is completely closed and the opening and closing means is in a closed state;

fig. 18 is a sectional view of a part of the pressure-releasing driving means in a state where the lid is completely closed and the opening and closing means is in a closed state according to the present invention;

fig. 19 is a schematic structural view in the lid opening process of the pot lid of the present invention;

fig. 20 is a sectional view of a switch resetting means portion in the lid opening process of the pot lid of the present invention;

fig. 21 is a sectional view of a locking device portion in the process of opening the lid of the pot lid of the present invention;

fig. 22 is a sectional view of a part of the pressure-releasing driving means in the lid-opening process of the pot lid of the present invention.

Reference numerals:

thepot body 1, the shell 11, themiddle ring 111, thelocking hole 112, the heat preservation cover 12, thepot teeth 121, the biground edge 122, thesmall round edge 123 and thepot container 13

Pot cover 2,steel cover component 21,lining component 22,first projection 221, first throughhole 222,outer cover component 23,second projection 231, second throughhole 2311,exhaust hole 24,pressure relief valve 25 andfloat 26

Locking device 3,bolt device 31,bolt connecting rod 311,bolt head 312, bolt stressedend 313, bolt concave 3131,bolt convex 3132,bolt fulcrum 314,stop device 32, firstelastic element 33

Switchdevice 4, lockingconvex column 41, connectingpiece 42,extension arm 421 and pressurerelief convex column 43

Switchresetting device 5,push rod 51,push rod head 52, pull-back device 53,action point 531, secondelastic piece 54 and push rod throughhole 55

The pressurerelief driving device 6, thepressure relief rod 61, the support end 62, the pressure reliefforce bearing end 63, thepressure relief fulcrum 64, the pressure relief latch 65, the pressure relief concave 66, the pressure relief convex 67, and the pressure reliefelastic element 68

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

Example 1

As shown in fig. 1 to 3, a pressure cooker comprises acooker body 1 and acooker cover 2, wherein thecooker body 1 comprises a housing 11 and a heat-insulating cover 12, the heat-insulating cover 12 is made of a metal material, acooker liner 13 is arranged in the heat-insulating cover 12, thecooker liner 13 is used for containing food, a plurality ofcooker teeth 121 are arranged on the outer edge of the upper end of the heat-insulating cover 12, thecooker teeth 121 enable the outer edge of the heat-insulating cover 12 to form a largecircular edge 122 and a smallcircular edge 123 with different diameters, the largecircular edge 122 is defined by the outer edge of thecooker teeth 121, and the smallcircular edge 123 is defined by the outer edge of the heat-insulating cover 12 between thecooker teeth 121 and the smallcircular edge 123. Thepot cover 2 is provided with the fastening teeth, the number of the fastening teeth corresponds to the number of thepot teeth 121, when the pot cover is in a completely covered state, the fastening teeth on thepot cover 2 correspond to the positions of thepot teeth 121, and the fastening teeth fasten thepot teeth 121 to play a role in sealing the pot cover 2; when the button teeth on thecooker cover 2 and thecooker teeth 121 are in the staggered position, thecooker cover 2 is released from the covering state, and at the moment, thecooker cover 2 and thecooker body 1 can be separated only by lifting thecooker cover 2.

The shell 11 is provided with amiddle ring 111 around the heat preservation cover 12, and themiddle ring 111 can receive water leaking from thepot container 13 or thepot cover 2 on one hand and provides a certain space for the arrangement of other components on the other hand.

Thepot cover 2 comprises asteel cover component 21, aninner lining component 22 and anouter cover component 23, thesteel cover component 21 is generally of a rigid structure and has high strength, the fastening teeth are arranged on the outer edge of thesteel cover component 21, the fastening teeth are formed by inward turning of the outer edge of the part of thesteel cover component 21, theinner lining component 22 is arranged on thesteel cover component 21 and is attached to thesteel cover component 21, theouter cover component 23 is arranged on theinner lining component 22 and is fastened with theinner lining component 22, and a handle and a pressure release valve are generally arranged on theouter cover component 23.

Alocking device 3 which can lock thepot cover 2 when thepot cover 2 is completely covered is arranged between thepot body 1 and thepot cover 2.

As shown in fig. 4, thelocking device 3 comprises alatch device 31 and astop device 32, when thelid 2 is in the fully closed state, thelatch device 31 can prevent thelid 2 from rotating relative to thepot body 1 under the limit of thestop device 32, so that thelid 2 can be prevented from being opened accidentally in the high-pressure state.

Thebolt device 31 is arranged on thecooker cover 2, and thestop device 32 is arranged on thecooker body 1.

Thebolt device 31 comprises abolt connecting rod 311, one end of thebolt connecting rod 311 is provided with abolt head 312, the other end is a bolt stressedend 313, and abolt fulcrum 314 is arranged between thebolt head 312 and the bolt stressedend 313. Thelatch link 311 is preferably a strip-shaped sheet structure, and thelatch link 311 may have a corresponding shape or a bend or curvature, which may better match the shape of thelid 2. Thelatch head 312 is cylindrical, thestop device 32 is a hole or a protrusion capable of limiting the position of thelatch head 312, and in this embodiment, thestop device 32 is preferably configured as a hole structure disposed on themiddle ring 111, that is, as thelocking hole 112.

Specifically, thelocking device 3 is disposed between theinner liner assembly 22 and theouter cover assembly 23, the outer edge of theinner liner assembly 22 is provided with afirst protrusion 221, theouter cover assembly 23 is provided with asecond protrusion 231 corresponding to thefirst protrusion 221, thefirst protrusion 221 and thesecond protrusion 231 are buckled together, thefirst protrusion 221 is provided with a first throughhole 222, thelatch head 312 extends from the first throughhole 222, thelatch fulcrum 314 is connected with thepot cover 2, and thelatch link 311 can rotate around thelatch fulcrum 314.

Thelocking device 3 is further provided with a firstelastic element 33 capable of driving thelatch head 312 to move towards thestop device 32, and the firstelastic element 33 is preferably a spring or a spring plate or a rubber band. The firstelastic element 33 may be arranged above thelatch head 312, above thelatch head 312 or below the latch force-bearingend 313, or in any case the firstelastic element 33 serves to urge thelatch head 312 in the direction of thestop 32.

As shown in fig. 5 and 10, thepot cover 2 is further provided with aswitch device 4, and theswitch device 4 is arranged on the pot cover and can slide on thepot cover 2. Theswitch device 4 acts on the boltforce bearing end 313, when theswitch device 4 is in an open state, theswitch device 4 applies a downward acting force to the boltforce bearing end 313 to enable thebolt connecting rod 311 to rotate around thebolt fulcrum 314 so as to drive thebolt head 312 to move towards a direction far away from thestop device 32, and further the locking of thepot cover 2 is released, and thepot cover 2 can be rotated at the moment; when theswitch device 4 is in the closed state, thelatch head 312 moves towards the direction close to thestop device 32 under the action of the firstelastic element 33, so that thelatch head 312 can extend into thelocking hole 112 on the middle ring, and the pot cover is locked, and thepot cover 2 cannot be rotated at this time.

Preferably, the latchforce bearing end 313 includes alatch notch 3131 and alatch protrusion 3132, thelatch notch 3131 is disposed near thelatch fulcrum 314, and thelatch protrusion 3132 is disposed away from thelatch fulcrum 314. Theswitch device 4 is provided with a lockingstud 41, when theswitch device 4 is in a closed state, the lockingstud 41 applies a downward acting force on abolt boss 3132 of the boltforce bearing end 313 to drive thebolt head 312 to move away from thestop device 32; when theswitch device 4 is in the open state, the lockingstud 41 is located at thelatch recess 3131 of the latchforce bearing end 313, and at this time, the lockingstud 41 does not apply a force to the latchforce bearing end 313, or the force applied is significantly less than the elastic force of the firstelastic element 33 to thelatch head 312, so that thelatch head 312 can be driven to extend into thelocking hole 112 by the firstelastic element 33.

Besides, thepot cover 2 is also provided with aswitch resetting device 5 which can change theswitch device 4 from the off state to the on state.

As shown in fig. 6, theswitch resetting device 5 includes apush rod 51, one end of thepush rod 51 is provided with apush rod head 52, the other end of thepush rod 51 is provided with a pull-back device 53, theswitch device 4 is provided with a connectingpiece 42 corresponding to the pull-back device 53, when thepot cover 2 is completely covered, thepush rod head 52 is located at the position of the smallcircular edge 123, the pot cover is opened, thepush rod head 52 sequentially passes through the smallcircular edge 123, the largecircular edge 122 and the smallcircular edge 123, and when thepush rod head 52 passes through the largecircular edge 122, thepush rod head 52 drives thepush rod 51 to move radially outwards and pulls theswitch device 4 to move through the pull-back device 53.

The sidewall of thesecond protrusion 231 is provided with a second throughhole 2311 for thepush rod head 52 to extend out, thepush rod head 52 and thesecond protrusion 231 are provided with a secondelastic element 54 capable of restoring thepush rod head 52, and the secondelastic element 54 is preferably a spring, a leaf spring or a rubber band.

Pull backdevice 53 is the quad slit, connectingpiece 42 includesextension arm 421 and locates on theextension arm 421 and can insert the spliced pole 422 of quad slit, the length of quad slit generally equals or approximately equals with the radius difference value of biground edge 122 and littleround edge 123, the quad slit possess one can with theaction point 531 of spliced pole 422 effect, obviously, the quad slit can be changed with spliced pole 422's position, and the structure after the change can realize the switch reset function equally.

Thepot cover 2 is also provided with afloater 26, thepush rod 51 is provided with a push rod throughhole 55, the matching relationship between the push rod throughhole 55 and thefloater 26 is the same as the prior art, namely the diameter of the middle part of thefloater 26 is small and the diameter of the lower end is large, in a natural state, the middle part of thefloater 26 can pass through the push rod throughhole 55, at the moment, thepush rod 51 can horizontally and radially move, and when the internal pressure of the pressure cooker is increased to a certain degree, thefloater 26 rises and the lower end of thefloater 26 clamps thepush rod 51 to organize thepush rod 51 to horizontally move.

Example 2

In this embodiment, the structural form of theplug device 31 is improved on the basis ofembodiment 1, specifically, theplug device 31 is disposed on thepot body 1, the stoppingdevice 32 is disposed on thepot cover 2, and theplug device 31 is pulled to realize the relative movement between the plug device and the stoppingdevice 32, thereby realizing the locking and unlocking of thepot cover 2.

Example 3

In this embodiment, the structural form of the plug head and the stop means is improved on the basis ofembodiment 1, specifically, the plug head and the stop means may be toothed structures capable of cooperating with each other, including a single-tooth structure and a multi-tooth structure, or may be other structures capable of meshing with each other.

Example 4

In this embodiment, the structural configuration of the switch device is improved on the basis ofembodiment 1, and specifically, the pot cover is further provided with a switch device, the switch device is acted on the stressed end of the latch, when the switch device is in an on state, the switch device applies a downward acting force to the stressed end of the latch to move the latch head in a direction away from the stopper device, and when the switch device is in an off state, the switch device applies an upward acting force to the stressed end of the latch to move the latch head in a direction close to the stopper device.

In this embodiment, the application of upward or downward force to the force-bearing end of the plug is accomplished by the switch device, in which case the cooperation of the firstelastic member 33 is not required, so that the structure of the pressure cooker can be further simplified.

Example 5

On the basis ofembodiment 1, be equipped withexhaust hole 24 andrelief valve 25 on the pressurecooker pot cover 2, the exhaust hole is located onpot cover 2 to with the pot UNICOM,relief valve 25 is installed in the upper end ofexhaust hole 24, under the natural state,relief valve 25 presses onexhaust hole 24, plays the sealing function, prevents that the pressure in the pot from revealing, when needs pressure release, can mentionrelief valve 25 and makerelief valve 25 and the gas vent separation on theexhaust hole 24, the inside atmospheric pressure of pressure cooker alright discharge in order to pass through the clearance betweenexhaust hole 24 and therelief valve 25 this moment.

In this embodiment, the pressure cooker is further provided with a pressurerelief driving device 6, as shown in fig. 7, the pressurerelief driving device 6 includes apressure relief rod 61, one end of thepressure relief rod 61 is asupport end 62, and is arranged below thepressure relief valve 25, so as to support thepressure relief valve 25 during pressure relief, the other end of thepressure relief rod 61 is a pressurerelief stress end 63, apressure relief fulcrum 64 is arranged between thesupport end 62 and the pressurerelief stress end 63, thepressure relief fulcrum 64 is arranged on the cooker lid through a pressure relief bolt 65, and is particularly arranged between theinner liner component 22 and theouter lid component 23, and the pressure relief bolt 65 passes through thepressure relief fulcrum 64 to install the pressure relief driving device on the cooker lid. When downward force is applied to the pressurerelief stress end 63, the support end 62 tilts upwards and drives thepressure relief valve 25 to move upwards to separate thepressure relief valve 25 from the exhaust port on theexhaust hole 24, so that pressure relief can be realized at the moment, when upward force is applied to the pressurerelief stress end 63, thesupport end 62 moves downwards, thepressure relief valve 25 is pressed on theexhaust hole 24 again under the action of self gravity, and theexhaust hole 24 is sealed again.

Further, can useswitching device 4 to realize the control to pressurerelease drive arrangement 6, specifically, onembodiment 1's basis, can also set uppressure release projection 43 again on switchingdevice 4, set up pressure releaseconcave position 66 and pressure releaseconvex position 67 at pressurerelease stress end 63 simultaneously, pressure releaseconcave position 66 sets up the position that is close to pressure releasefulcrum 64, and pressure releaseconvex position 67 sets up the position of keeping away frompressure release fulcrum 64, pressurerelease drive arrangement 6 still is equipped with the pressure releaseelastic component 68 that can drivesupport end 62 downward displacement, and pressure releaseelastic component 68 can be structures such as spring, shell fragment or rubber band. The pressure reliefelastic member 68 may be disposed above the side near thesupport end 62 or below the side near the pressure reliefforce receiving end 63.

When theswitch device 4 is in the closed state, the pressure reliefconvex column 43 applies a downward acting force to the pressure reliefconvex position 67 of the pressure reliefforce bearing end 63, the support end 62 tilts upward and drives thepressure relief valve 25 to move upward, so that thepressure relief valve 25 is separated from the exhaust port on theexhaust hole 24, and at the moment, the pressure relief can be realized. When theswitch device 4 is in the open state, the pressure reliefconvex column 43 is located at the pressure reliefconcave position 66 of the pressure relief stressedend 63, at this time, the pressure reliefconvex column 43 does not apply force to the pressure relief stressedend 63, or the applied force is significantly smaller than the elastic force of the pressure reliefelastic piece 68 to thesupport end 62, so that thesupport end 62 can move downwards through the pressure reliefelastic piece 68, thepressure relief valve 25 presses theexhaust hole 24 again under the action of self gravity, and theexhaust hole 24 is sealed again.

The working principle of the patent is as follows:

as shown in fig. 8 to 11, the pot cover 2 is placed at the opening position of the pot body, i.e. the initial position of closing the pot cover, at this time, the push rod head 52 of the switch resetting device 5 is located at the small circular edge 123 of the heat-insulating cover 12, the pot cover 2 is rotated counterclockwise, at this time, the latch head 312 of the latch connecting rod 311 presses the middle ring surface to slide, and the push rod head 52 moves toward the large circular edge 122 along the small circular edge 123 of the heat-insulating cover to drive the push rod 51 to move radially outward in the horizontal direction, at the same time, the pull-back device 53 on the switch resetting device 5 drives the switch device 4 to move, so that the switch device is in the open state, i.e. the locking convex column 41 of the switch device 4 is located at the latch concave position 3131 of the locking device 3, the convex column 43 of the switch device 4 is located at the concave position 66 of the pressure relief driving device 6, at this time, the latch head 312 is directly or indirectly applied with a downward force by the first elastic member 33, and likewise, the support end 62 of the driving device 6 is directly or indirectly applied with a downward pressure relief force, so that the pressure relief vent hole 25 is pressed on the vent hole 24.

As shown in fig. 12 to 15, when thepot cover 2 is rotated to a completely covered state, that is, when the fastening teeth on thepot cover 2 and thepot teeth 121 on the heat-insulating cover 12 are fastened correspondingly, thepush rod head 52 of theswitch resetting device 5 is also located at the smallcircular edge 123 of the heat-insulating cover 12, thelatch head 312 of thelatch link 311 is inserted into the hole-shapedstopper 32 provided on the middle ring under the action of the firstelastic element 33, so as to lock thepot cover 2, thepressure release valve 25 is pressed against theexhaust hole 24, and the pressure pot is in a sealed state.

In the process of cooking food in the pressure cooker, when the internal air pressure of the pressure cooker reaches a certain degree, for example, 4Kpa, the float on thepressure cooker lid 2 rises and blocks thepush rod 51, at this time, thepush rod 51 cannot displace in the horizontal direction, and thepush rod head 52 is blocked by the largeround edge 122, so that thepressure cooker lid 2 cannot be rotated.

As shown in fig. 16 to 18, when pressure relief is required, theswitch device 4 is toggled to make theswitch device 4 in a closed state, that is, the lockingconvex column 41 of theswitch device 4 is located at the boltconvex position 3132 of thelocking device 3, the pressure reliefconvex column 43 of theswitch device 4 is located at the pressure reliefconvex position 67 of the pressurerelief driving device 6, at this time, the lockingconvex column 41 applies a downward force to the boltconvex position 3132, thebolt head 312 is tilted to be separated from the hole-shaped stoppingdevice 32 on the middle ring, locking of the lid is released, similarly, the pressure reliefconvex column 4 also applies a downward force to the pressure reliefconvex position 67 of the pressurerelief driving device 6, the supportingend 62 of the pressurerelief driving device 6 is tilted to make thepressure relief valve 25 at least partially separated from theexhaust hole 24, the sealing of theexhaust hole 24 is released, the pressure relief of the pressure cooker starts, at this time, the connecting column 422 on the extendingarm 421 of theswitch device 4 is close to theaction 531 of thepullback device 53.

When the pressure is relieved to a certain degree, the floater on thepot cover 2 descends, and the locking of the pot cover is further released.

As shown in fig. 19 to 22, when thepot lid 2 is rotated clockwise, thepush rod 52 of theswitch resetting device 5 moves from the smallcircular edge 123 to the largecircular edge 122, at this time, thepush rod 52 drives thepush rod 51 to move radially outward in the horizontal direction, and the pull-back device 53 on theswitch resetting device 5 drives theswitch device 4 to move, so that theswitch device 4 returns to the initial state of closing the lid again, the automatic resetting of theswitch device 4 is completed, and the user is prevented from forgetting to reset theswitch device 4 after opening the pot lid.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (8)

1. A pressure cooker comprises a cooker body and a cooker cover, wherein the cooker cover is provided with an exhaust hole and a pressure relief valve, and the pressure relief valve is arranged on the exhaust hole;

a locking device capable of locking the pot cover in a fully covered state of the pot cover is further arranged between the pot body and the pot cover, the locking device comprises a bolt device and a stopping device, and when the pot cover is in the fully covered state, the bolt device stops the pot cover from rotating relative to the pot body under the limitation of the stopping device; the pot cover comprises a pot cover body, a pot cover body and a switch device, wherein the pot cover body is provided with a pot cover body, the switch device is arranged on the pot cover body, the pot cover body is provided with a first elastic piece, the switch device is arranged on the pot cover body, the first elastic piece is arranged at the bottom of the pot cover body, the second elastic piece is arranged at the bottom of the pot cover body, the switch device is arranged at the bottom of the pot cover body, the pot cover body is provided with a second elastic piece, the first elastic piece is arranged at the bottom of the second elastic piece, the second elastic piece is arranged at the bottom of the second elastic piece, and the second elastic piece is connected with the first elastic piece;

the pressure relief driving device comprises a pressure lever, one end of the pressure relief lever is a supporting end and is arranged below the pressure relief valve, the other end of the pressure relief lever is a pressure relief stressed end, and a pressure relief fulcrum is arranged between the supporting end and the pressure relief stressed end.

2. The pressure cooker according to claim 1, wherein said pressure relief force receiving end is provided with a pressure relief concave portion and a pressure relief convex portion, and said switch device is provided with a pressure relief convex pillar capable of applying a downward pressure to said pressure relief convex portion.

3. The pressure cooker according to claim 2, wherein said pressure relief driving means is further provided with a pressure relief elastic member capable of moving said support end downward.

4. The pressure cooker as claimed in claim 1, wherein the plug head is cylindrical, the stopping means is a hole or a protrusion capable of limiting the plug head, a middle ring is provided on the cooker body, and the stopping means is provided on the middle ring.

5. Pressure cooker according to claim 1, characterized in that said locking means are further provided with a first elastic element able to drive the movement of said latch head towards the stop means.

6. The pressure cooker of claim 1, wherein the latch force-bearing end includes a latch recess and a latch projection, and the switch device is provided with a locking projection, the locking projection exerting a downward force on the latch projection of the latch force-bearing end when the switch device is in the closed state, and the locking projection being located at the latch recess of the latch force-bearing end when the switch device is in the open state.

7. The pressure cooker as claimed in claim 1, wherein the pressure cooker body is further provided with a heat-insulating cover, the outer edge of the heat-insulating cover comprises a large circular edge and a small circular edge, the switch resetting device comprises a push rod, one end of the push rod is provided with a push rod head, the other end of the push rod is provided with a pull-back device, the switch device is provided with a connecting piece corresponding to the pull-back device, when the cooker cover is completely covered, the push rod head is located at the small circular edge, and when the cooker cover is opened, the push rod head slides from the small circular edge to the large circular edge and pulls the switch device to move through the pull-back device.

8. The pressure cooker as claimed in claim 7, wherein the pull-back means is a square hole, and the connecting member includes an extension arm and a connecting post provided on the extension arm and capable of being inserted into the square hole.

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