CN110301815B

CN110301815B - Method for opening and closing pot cover and inner pot

Info

Publication number: CN110301815B
Application number: CN201910518213.6A
Authority: CN
Inventors: 顾斌; 王少华; 肖正辉
Original assignee: Tuopu Jinggong Intelligent Manufacturing Shaoyang Co ltd
Current assignee: Tuopu Jinggong Intelligent Manufacturing Shaoyang Co ltd
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2023-04-28
Anticipated expiration: 2039-06-14
Also published as: CN110301815A

Abstract

The cooking utensil comprises a cooker base, an inner cooker arranged on the cooker base and a cooker cover hinged on the rear end part of the cooker base in a turnover manner, wherein the inner cooker is provided with a rigid cooker edge protruding outwards, the cooker cover comprises an outer cover and a rigid member arranged below the outer cover, and the cooker cover is used for covering a cooker opening of the inner cooker when the cooker cover is closed; the double-lock mechanism is characterized in that the double-lock mechanism is arranged, and comprises the steps of locking the rigid member and the rigid pan edge and locking the inner pan and the pan base under the condition that the pan base and the pan cover are covered; when the inner pot is placed on the pot base before closing the cover, the inner pot and the pot base are locked, and then a double-locking mechanism is completed by locking the rigid member and the rigid pot edge in response to a cover closing instruction action allowing the cover to be turned over, so that the cover is turned over; in response to an allowable uncapping instruction, at least the lock between the rigid member and the rigid rim is released to effect one-touch uncapping.

Description

Method for opening and closing pot cover and inner pot

Technical Field

The invention relates to a cooking utensil capable of being used for cooking food, in particular to a cooking utensil with a double safety locking structure, which can realize a turnover cover and a one-key cover, and is very convenient.

Background

The pressure cooker belongs to a common kitchen cooking appliance in daily life, and utilizes the principle that the boiling point of liquid rises along with the rising of air pressure to create a high-pressure cooking environment in a food cooking cavity of the pressure cooker, so that the effect of accelerating the food cooking speed is achieved. The air pressure in the food cooking chamber is very high, often up to above 4 KPa. If the cover of the pressure cooker is accidentally opened under the action of high-pressure expansion force, serious injury to a user is necessarily caused. In order to avoid accidents, the traditional solution is that a plurality of upper rotating pot teeth are arranged on the outer edge of a pot cover at intervals, lower rotating pot teeth matched with the upper rotating pot teeth are arranged on the top of a pot base, and the pot cover is tightly locked to the pot base through a rotating joint between the upper rotating pot teeth and the lower rotating pot teeth. However, such a structure restricts the rotation of the lid and the base, and the separation of the lid and the base. Thus, both the mounting of the lid to the base and the dismounting of the lid from the base are inconvenient.

In order to solve the above-mentioned problems, a clamping type covering structure has been proposed. A micro-pressure electric cooker as disclosed in patent 201710108580.x, for example, comprises a cooker body 1 and a cooker cover 2, wherein one end of the cooker cover 2 is hinged on the cooker body 1, an inner cooker 3 is accommodated in the cooker body 1, the cooker cover 2 comprises an outer cover and an inner cover 4, and the inner cover 4 can be covered on the inner cooker 3 to enable the inner cooker 3 to form a relatively sealed cooking cavity. The inner cover 4 is provided with a clamping part capable of floating up and down, and the clamping part comprises a caliper 7 and a caliper bracket 8. The calipers 7 can clamp the edge of the inner cover 4 and the pot edge of the inner pot to lock the inner cover 4 and the inner pot 3. On the basis of adopting the clamping part to lock the inner cover 4 and the inner pot 3, a hinge structure can be adopted between the pot cover 2 and the pot body 1, so that the opening and closing operation of the pot cover 2 is facilitated.

Disclosure of Invention

The inner cover of the micro-pressure electric cooker disclosed in the patent 201710108580.X is clamped with the inner pot by a clamp to keep the inner cover covered on the inner pot. However, as the cooker cover is hinged on the cooker body, a driving torsion spring capable of driving the cooker cover to automatically open is also arranged in order to enable the cooker cover to automatically open. The torsion of the driving torsion spring is very large, and the pot cover and the inner pot can be lifted together, so that the inner pot is separated from the heating plate arranged on the pot body, the use is affected, and the whole appearance of the cooking utensil is damaged. How to ensure the use safety of the cooking utensil and stably cover the pot cover on the pot body is a technical problem to be further solved.

In order to overcome the defects of the prior art, the invention provides a method for opening and closing a pot cover and an inner pot, wherein the cooking utensil comprises a pot base, the inner pot placed on the pot base and a pot cover hinged on the rear end part of the pot base in a turnover manner, the inner pot is provided with a rigid pot edge protruding outwards, the pot cover comprises an outer cover and a rigid member arranged below the outer cover, and the pot cover is used for covering a pot opening of the inner pot when being based on one cover closing action; the double-lock mechanism is characterized in that the double-lock mechanism is arranged, and the double-lock mechanism is used for locking the rigid member and the rigid pot edge and locking the inner pot and the pot base under the condition that the pot base and the pot cover are combined; when the inner pot is placed on the pot base before closing the cover, the inner pot and the pot base are locked, and then the rigid member and the rigid pot edge are locked to complete the double-locking mechanism in response to a cover closing instruction action allowing the cover to be turned over, so that the cover is turned over; in response to an allowable uncapping instruction, at least unlocking between the rigid member and the rigid rim to effect one-touch uncapping.

According to the technical scheme, compared with the prior art, the double-locking mechanism has the beneficial effects that compared with the prior art, the sealing scheme of the inner pot is simplified through locking between the rigid member and the rigid pot edge, the cover closing scheme of the whole cooking appliance is also simplified, and particularly the connection stability and controllability between the outer cover of the pot cover and the pot base in the cooking process are improved; the second locking mechanism is used for locking and connecting the inner pot with the pot base when the inner pot is placed on the pot base before closing the cover, so that the outer cover is stably covered on the pot base through the connection relation between the outer cover and the rigid member and the locking relation between the rigid member and the rigid pot edge, and the inner pot can be directly placed on the pot base in a correct posture, so that the normal use of the cooking utensil is ensured. In addition, as the one-key cover opening is realized, the cover opening operation of the pot cover can be simply and conveniently finished, and the convenient application experience of the cooking utensil is improved.

The further technical scheme can be that after the one-key cover opening is finished, the locking between the inner pot and the pot base is released in response to an allowed instruction for opening the inner pot, so that the inner pot can be taken out.

A further technical solution may be that, in response to an allowable cover opening command, the locking between the rigid member and the rigid pan edge is automatically released by means of a driving force provided by the cover opening command, so as to implement one-key cover opening.

If the pot cover is opened when the cooking environment in the inner pot is in a high-pressure state or a high-temperature state, food in the pot can be sprayed out to scald a user, and even the pot cover is sprayed out under the action of high pressure to injure the user by smashing, which is very threatening. It is necessary to define the opening condition of the pot cover. The further technical scheme may be that the unlocking action between the rigid member and the rigid pan edge is limited by the pressure or temperature of the air in the inner pan, and when the pressure or temperature of the air in the inner pan is higher than a threshold value, the unlocking action between the rigid member and the rigid pan edge is limited by the self-locking mechanism.

The further technical scheme may be that the self-locking mechanism comprises a self-locking column, the self-locking mechanism is arranged on the rigid member, and the self-locking column responds to the pressure or the temperature of the air pressure in the inner pot to limit the unlocking action between the rigid member and the rigid pot edge. By means of the technical scheme, when the pressure or temperature of the air pressure in the inner pot is higher than the threshold value, unlocking between the rigid member and the rigid pot edge is limited through the self-locking column, and the pot cover cannot be opened at the moment. Only when the pressure or temperature of the pressure in the inner pot is lower than a threshold value, the self-locking column releases the locking between the rigid member and the rigid pot edge, and the pot cover can be opened at the moment, so that the use safety performance of the cooking utensil is effectively improved.

Further, the rigid member may be an inner lid of the lid, and the inner lid may be configured to cover a mouth of the inner pot when the lid is closed.

The further technical scheme may be that two locking mechanisms, namely a first locking mechanism and a second locking mechanism, are provided, the first locking mechanism is used for locking the rigid member and the rigid pan edge in response to a closing action instruction, and the second locking mechanism is used for locking the rigid pan edge and the pan base; and an unlocking device is arranged, and transmits an uncovering instruction to drive the first locking mechanism to unlock the rigid member and the rigid pot edge.

Further technical scheme may be that an inner pot release device is further provided on the pot base, and the inner pot release device is started to drive the second locking mechanism to release the locking between the inner pot and the pot base.

The further technical scheme may further include a central controller and a position sensor, wherein the sensor senses a position signal that the locking mechanism is in place, and the position signal is fed back to the central controller, and the central controller determines whether to start heating or pressurizing according to the position signal.

Further technical solution may further include a display, through which an analog signal that the double lock mechanism has been executed in place is displayed.

Because the invention has the characteristics and the advantages, the invention can be applied to a method for opening and closing the pot cover and the inner pot.

Drawings

Fig. 1 is a schematic top view of a cooking appliance with a split safety lock structure according to the technical scheme of the present invention;

FIG. 2 is a schematic view of a cross-sectional structure in the direction A-A in FIG. 1;

FIG. 3 is a schematic view of a sectional structure in the direction B-B in FIG. 1;

FIG. 4 is a schematic cross-sectional view of the structure in the direction C-C in FIG. 2;

fig. 5 is a schematic perspective view of the outer cover 21;

fig. 6 is a schematic perspective view of the lid 2 shown, with the decorative cover 23 omitted;

fig. 7 is a second mounting structure of the tension spring.

Detailed Description

The structure of the cooking appliance applying the technical scheme of the invention is further described below with reference to the accompanying drawings.

As shown in the figure, the invention provides a cooking appliance with a separated safety locking structure. The cooking utensil comprises a cooker base 1, an inner cooker 11 arranged on the cooker base 1 and a cooker cover 2 which is hinged on the rear end part of the cooker base 1 in a turnover manner, wherein the inner cooker 11 is provided with a rigid cooker edge 110 protruding outwards, and the cooker cover 1 is used for covering a cooker opening of the inner cooker 11 when the cooker is based on a cover closing action. Wherein the lid 2 comprises an outer lid 21, a decorative cover 23 mounted on the outer lid 21, and a rigid member 22 mounted under the outer lid 21, the rigid member 22 being adapted to bear or share the air pressure in the inner pot 11. In the present embodiment, the rigid member 22 is an inner lid of the lid 2 for covering a mouth of the inner pot 11 upon a closing action. The cooker further comprises a locking mechanism, wherein the locking mechanism is used for completing a double-locking mechanism, and the double-locking mechanism is used for locking not only the rigid member 22 and the rigid cooker edge 110, but also the inner cooker 11 and the cooker base 1 under the condition that the cooker base 1 and the cooker cover 2 are closed; the locking mechanism comprises a first locking mechanism 100 and a second locking mechanism 100a, wherein the first locking mechanism 100 is used for locking the rigid member 22 and the rigid pan edge 110 in response to a cover closing command action of the cooker cover 2 allowing the cover to be turned over and closed, and the second locking mechanism 100a is used for locking and connecting the inner pan 11 and the pan base 1 when the inner pan 11 is placed on the pan base 1 before the cover is closed. And the device also comprises an unlocking device 200, wherein the unlocking device 200 is used for transmitting an uncovering instruction and at least driving the first locking mechanism to unlock the rigid member and the rigid pot edge.

As shown in fig. 1 and 2, the locking mechanism includes a first locking mechanism 100, the first locking mechanism 100 includes a pair of left and right arranged supporting frames (3, 3 a) slidably provided on the outer lid 21, the supporting frames (3, 3 a) are capable of moving relatively close to each other, i.e., toward the center of the outer lid 21, in response to a closing operation, and also capable of moving relatively away from each other, i.e., toward the outside of the outer lid 21, in response to an opening command transmitted from the unlocking device 200. Two rigid holders 4 (rigid holders 4a and 4b, rigid holders 4c and 4d, respectively) are provided on the support frames (3, 3 a), it is of course possible in other embodiments to provide three, four or even more support frames, one, three or even more rigid holders per support frame being possible, the rigid holders 4 having upper and lower jaw edges 41, 42 and a jaw connecting wall 43 connected between the upper and lower jaw edges 41, 42. A nip 40 is formed between the upper nip edge 41, the lower nip edge 42 and the connecting wall 43 (of course, in other embodiments, two, three or more nips may be provided for each rigid retainer 4). The rigid holder 4 is used for holding the rigid member 22 and the rigid rim 110 of the inner pot 11 through the clamping opening 40 when the supporting frame (3, 3 a) moves towards the center of the outer cover 21, and the rigid holder 4 is also used for releasing the rigid rim 110 of the inner pot 11 when the supporting frame (3, 3 a) moves towards the outer side of the outer cover 21 respectively. In order to be able to drive the support frame (3, 3 a) in the direction of the centre of the outer cover 21 and to keep the rigid holder 4 on the support frame (3, 3 a) in a clamped state, the locking mechanism further comprises a locking actuator which is a tension spring 6 with a return driving force, both ends of the tension spring 6 being connected to a pair of left and right arranged support frames (3, 3 a), respectively. The tension spring 6 is used for driving the supporting frames (3, 3 a) to move towards the center direction of the outer cover 21 in response to the closing action.

The unlocking device 200 comprises an intermediate transition arm 5 movably arranged on the outer cover 21, wherein the intermediate transition arm 5 is associated with the supporting frames (3, 3 a), and particularly the intermediate transition arm 5 is respectively and indirectly abutted against a pair of supporting frames (3, 3 a) arranged left and right through a pair of swinging arms (51, 52). Of course, in other embodiments, the intermediate transition arm 5 can also rest directly against a pair of left-right support frames (3, 3 a). When the intermediate transition arm body 5 has forward movement moment in response to the uncapping instruction and moves forward, the support frames (3, 3 a) can be driven to move relatively away from the movement, namely, to the outer side direction of the outer cover 21, and the tension spring 6 is driven to expand for energy storage. When the intermediate transition arm body 5 loses the forward movement moment in response to the closing action, the tension spring 6 can drive the pair of support frames (3, 3 a) to move relatively close to each other, namely move towards the center direction of the outer cover 21, and the power of the pair of support frames (3, 3 a) to move relatively close to each other can drive the intermediate transition arm body 5 to move reversely.

In addition, in other embodiments, another mounting structure may be adopted for the tension spring 6, as shown in fig. 7, one end of the tension spring 6 'is connected to the outer cover 21' and the other end is connected to the intermediate transition arm body 5 ', and the intermediate transition arm body 5' is movably connected to the supporting frame (3 ', 3 a'). There are various structures from the intermediate transition arm body 5 'to the supporting frames (3', 3a '), for example, the supporting frames (3', 3a ') are respectively provided with shifting arms (51', 52 ') which are obliquely arranged to the sliding grooves (30', 30a '), and the intermediate transition arm body 5' is provided with shifting arms (51 ', 52') which respectively extend into the sliding grooves (30 ', 30 a'). When the intermediate transition arm body 5 ' has a forward movement moment and moves forward, a pair of supporting frames (3 ', 3a ') can be driven to move towards the outer side direction of the outer cover 21 ' in a matched mode with the shifting arms (51 ', 52 ') through the sliding grooves (30 ', 30a '), and the tension spring 6 ' is driven to open and store energy, otherwise, when the intermediate transition arm body 5 ' loses the moment of forward movement in response to the closing action, the tension spring 6 ' can drive the supporting frames (3 ', 3a ') to move relatively close to the center direction of the outer cover 21 ' in a matched mode with the shifting arms (51 ', 52 ') through the sliding grooves (30 ', 30a '), and can drive the intermediate transition arm body 5 ' to move reversely. In other embodiments, of course, the intermediate transition arm body 5 ' may also be movably connected to the support frame (3 ', 3a ') by means of a pivot arm.

According to the above technical solution, the tension spring 6 can move the rigid clamper 4 on the support frame (3, 3 a) towards the center direction of the outer cover 21 and keep the clamping state, but the tension spring 6 cannot prevent the intermediate transition arm body 5 from moving forward to drive the support frame (3, 3 a) to move towards the outer side direction of the outer cover 21. In addition, the tension springs 6 form flexible connection between the pair of supporting frames (3, 3 a), which is beneficial to enabling the rigid clamp holder 4 to flexibly adjust the clamping position to adaptively clamp the rigid member 22 and the rigid pot edge 110 of the inner pot 11, so that the situation that the rigid clamp holder 4 cannot clamp the rigid member 22 and the rigid pot edge 110 of the inner pot 11 to increase potential safety hazards due to assembly errors, manufacturing errors or deformation of the rigid member 22 and the rigid pot edge 110 of the inner pot 11 in the use process is avoided, and the like is avoided. In addition to the tension spring 6, the locking actuator may be a pair of first magnets (not shown) that are attracted to each other, and the pair of first magnets are disposed separately on a pair of left and right support frames (3, 3 a). When the intermediate transition arm body 5 has forward movement moment and moves forward, the pair of support frames (3, 3 a) can be driven to move towards the outer side direction of the outer cover 21 against the mutual magnetic attraction force between the first magnets, otherwise, when the intermediate transition arm body loses the forward movement moment in response to the closing action, the first magnets can drive the support frames (3, 3 a) to move relatively close to each other, namely, move towards the center direction of the outer cover 21, and can drive the intermediate transition arm body 5 to move reversely.

Further, the outer cover 21 and the intermediate transition arm 5 are respectively provided with a second magnet (not shown in the figure) capable of attracting each other, and when the intermediate transition arm 5 loses the forward movement moment in response to the closing action, the intermediate transition arm 5 receives a dual driving force capable of driving the intermediate transition arm to move reversely, one driving force is derived from the magnetic attraction driving force of the second magnet, and the other driving force is derived from the direct or indirect driving force of the tension spring 6. The second magnet and the tension spring 6 cooperate to drive the intermediate transition arm body 5 to move reversely.

As shown in fig. 3, 5 and 6, the connection relationship between the pair of the supporting frames (3, 3 a) and the outer cover 21 is the same, and the connection relationship between the supporting frames 3 and the outer cover 21 will be described as an example. Two left and right separated avoidance notches (210, 211) are arranged at the left side of the outer cover 21. Wherein the rigid retainer 4a is disposed in the escape notch 210, the upper nip edge 41 of the rigid retainer 4a is disposed above the rigid member 22, and the lower nip edge 42 is disposed below the rigid member 22. The outer cover 21 is provided with threaded posts (212, 213), the posts (212, 213) respectively penetrate through the support frame 3 above the outer cover 21, the top ends of the posts (212, 213) are respectively screwed with jacking screws (31, 32), the posts (212, 213) are respectively sleeved with spring sleeves (33, 34), jacking springs (35, 36) are respectively arranged between the spring sleeves (33, 34) and screw heads of the jacking screws (31, 32), and the spring sleeves (33, 34) are jacked on the support frame 3 so that the upper clamping opening edge 41 of the rigid clamp 4a is kept tightly attached to the upper surface of the outer edge part of the rigid member 22 and moves left and right along with the support frame 3 on the upper surface of the outer edge part of the rigid member 22. According to the technical scheme, the pressing springs (35, 36) are limited between the spring sleeves (33, 34) and screw heads of the pressing screws (31, 32) to press the spring sleeves (33, 34) downwards so that the upper clamping opening edge 41 of the rigid clamp 4a is kept close to the upper surface of the outer edge part of the rigid member 22, and therefore, when the rigid clamp is assembled, the upper surface of the outer edge part of the rigid member 22 can provide a positioning reference for assembly positioning of the rigid clamp 4a, and compared with the scheme of the existing upper and lower double-gap configuration, the operation of controlling the assembly sizes of the rigid member 22 and the rigid clamp 4a in the up-down direction is reduced, and the assembly difficulty is lowered. In addition, the consumable amount of the rigid holder 4a is reduced, and the cost is reduced. And secondly, a flexible connection can be formed between the support 3 and the outer cover 21. When the high-pressure expansion force pushes the inner cover to float upwards in the cooking pressurization process, the rigid member 22 can drive the supporting frames (3, 3 a) to float upwards through the rigid clamp holder 4c against the elastic jacking force of the jacking springs (35, 36), so that the high-pressure expansion force can be buffered, the high-pressure expansion force transmitted from the inner cover to the outer cover 21 can be reduced, and serious deformation of the outer cover 21 after being stressed is avoided. The rigid holder 4b is provided in the escape notch 211, and the upper nip edge of the rigid holder 4b is held in close contact with the upper surface of the outer edge portion of the rigid member 22 by the above-described structure.

As shown in fig. 4, the second locking mechanism 100a is used for locking and connecting the inner pan 11 and the pan base 1 when the inner pan 11 is placed on the pan base 1 before closing the cover. The second locking mechanism 100a comprises a pair of upper and lower hooks (8, 8 a) capable of hooking each other, the upper hook 8 is provided on a pan side wall of the inner pan 11, and the lower hook 8a is provided on the pan base 1. Before closing the cover, when the inner pot 11 is placed on the pot base 1, the upper and lower hooks (8, 8 a) are hooked together in advance to lock the inner pot 11 and the pot base 1. Of course, in other embodiments, the upper clasp 8 may be disposed on the rigid rim 110 of the inner pot 11, such that the second locking mechanism 100a locks the rigid rim 110 with the pot base 1. Alternatively, the second locking mechanism may include a pair of magnets capable of magnetically attracting each other, and the pair of magnets may be disposed separately on the inner pan 11 and the pan base 1. An inner pot release device (not shown in fig. 4) is further arranged on the pot base 1, and the second locking mechanism 100a can be driven by starting the inner pot release device to release the locking between the inner pot 11 and the pot base 1. Of course, in other embodiments, the unlocking device may also synchronously drive the second locking mechanism 100a to unlock the inner pan 11 and the pan base 1 when driving the first locking mechanism to unlock the rigid member and the rigid pan edge.

The cooking appliance further comprises a central controller (not shown) and a position sensor, wherein the position sensor is used for sensing a position signal that the locking mechanism (100, 100 a) is in place after completing the double locking mechanism and feeding back the position signal to the central controller, and the central controller is used for determining whether heating or pressurizing is started according to the position signal. Thus, the central controller can intelligently and effectively control the heating or pressurizing starting condition of the cooking utensil. For example, it may be controlled that pressurization but heating may be initiated when the locking mechanism (100, 100 a) does not complete the double lock mechanism, or that neither pressurization nor heating may be initiated, but that heating or pressurization may only be initiated when the locking mechanism completes that the double lock mechanism has been in place. The control configuration mode is beneficial to effectively ensuring the heating or pressurizing cooking effect of the cooker, meeting the cooking needs of users, and optimizing the use safety performance of the cooking appliance. Further, the sensor is used for sensing a position signal of whether the support frame (3, 3 a) or the rigid holder 4 moves to the center direction of the outer cover 21 to reach a preset position, and the central controller is used for determining that heating or pressurizing is started according to the position signal of the support frame (3, 3 a) or the rigid holder 4 which is sensed by the sensor and has moved to the preset position to the center direction of the outer cover 21, otherwise, heating or pressurizing is not started. Further, a display is included, through which an analog signal that the double lock mechanism has been executed in place is displayed.

The intermediate transition arm 5 is often in a stowed state and cannot be directly touch-operated, so further, the unlocking device 200 further includes a button 7, where the button 7 is configured to provide a forward movement torque for the intermediate transition arm 5 and drive the intermediate transition arm 5 to move forward in response to an instruction of opening the cover. Thus, in response to an allowable opening command, the locking between the rigid member 22 and the rigid rim 110 is automatically released by the driving force provided by the opening command to thereby effect one-touch opening.

If the rigid retainer 4 is restored to the locking position before closing the lid after opening the lid, the next closing operation must be effected, so that it is necessary to hold the rigid retainer 4 in the unlocking position before closing the lid after opening the lid. In view of this, as shown in fig. 4, the unlocking device 200 further includes an unlocking maintaining mechanism 300, where the unlocking maintaining mechanism 300 is configured to enable the intermediate transition arm 5 to be maintained in the unlocking position when the intermediate transition arm 5 is caused to lose the forward movement moment. Specifically, the unlocking retainer includes a moving positioning column 9 movably provided on the intermediate transition arm body 5, a retaining spring 91 provided between the intermediate transition arm body 5 and the moving positioning column 9 and capable of driving the moving positioning column 9 to move downward, a receiving hole 214 provided on the outer cover 21 for receiving one end portion of the moving positioning column 9, and a projection 12 provided on the pan base 1 facing the receiving hole 214. When the pot cover 2 is closed, the protrusion 12 can be inserted into the receiving hole 214 to eject the movable positioning column 9 out of the receiving hole 214, at this time, the intermediate transition arm body 5 loses the holding force and moves reversely and leaves the receiving hole 214 with the movable positioning column 9, when the intermediate transition arm body 5 moves forward to finish unlocking, the pot cover 2 starts to turn up, and the movable positioning column 9 moves not only above the receiving hole 214 but also is reinserted into the receiving hole 214 under the drive of the holding spring 91 so as to keep the intermediate transition arm body 5 in the unlocking position. This makes it difficult for the rigid retainer 4 to move in the center direction of the outer lid 21 even after an external force is applied thereto and to erroneously switch to the locking position, thereby affecting the next closing operation of the lid 2. Thus, not only can the smooth cover opening be realized, but also the smooth cover closing can be realized.

As shown in fig. 4, if the cover 2 is opened when the cooking environment in the inner pot 11 is in a high pressure state, food in the pot can be sprayed to burn the user, and even the cover 2 is exploded to injure the user under the high pressure, which is very dangerous. It is necessary to define the opening condition of the pot cover 2. In view of this further, the unlocking action between the rigid member 22 and the rigid rim 110 is limited by the pressure of the air inside the inner pot 11, and when the pressure of the air inside the inner pot is higher than a threshold value, the unlocking action between the rigid member 22 and the rigid rim 110 is limited by the self-locking mechanism 400. The self-locking mechanism is provided on the rigid member 22 of the lid 2 and is responsive to the air pressure within the inner pot 11. The self-locking mechanism 400 comprises a self-locking column 92, the intermediate transition arm 5 is provided with a self-locking hole 50 capable of receiving the self-locking column 92, and in other embodiments, the self-locking hole 50 may be disposed on the supporting frame (3, 3 a). The self-locking column 92 is used for being inserted into the self-locking hole 50 when the pressure of the air pressure in the inner pot 11 is higher than a threshold value, so that the intermediate transition arm body 5 cannot move on the outer cover 21 to realize self locking and keep at a locking position. According to the above technical solution, when the pressure of the air pressure in the inner pot 11 is higher than the threshold value, the movement of the intermediate transition arm 5 is limited by the self-locking column 92, and the pot cover 2 cannot be opened. The lid 2 can be opened only when the pressure of the air pressure in the inner pot 11 is lower than a threshold value, and the self-locking column 92 is disengaged from the self-locking hole 50 to release the movement of the intermediate transition arm body 5. The self-locking column 92 responds to the pressure of the air pressure in the inner pot 11 to limit the unlocking action between the rigid member 22 and the rigid pot rim 110, thereby effectively improving the use safety of the cooking utensil. In addition, the unlocking action between the rigid member 22 and the rigid rim 110 may be limited by the temperature of the inner pot 11, and the unlocking action between the rigid member 22 and the rigid rim 110 may be limited by a self-locking mechanism when the temperature of the inner pot is higher than a threshold value.

In order to be able to drive the support frame (3, 3 a) automatically, a driving scheme can be adopted in other embodiments, the locking mechanism further comprises an electric driver arranged on the outer cover 21, the electric driver is in transmission connection with the support frame (3, 3 a), and the electric driver is used for driving the support frame (3, 3 a) to move towards the center of the outer cover 21 in response to a cover closing command action and also can move towards the outer side of the outer cover 21 in response to a cover opening command transmitted by the unlocking device 200. According to the technical scheme, the electric driver can realize automatic control on the supporting frames (3, 3 a).

According to the technical scheme, the double-locking mechanism is arranged, so that compared with the prior art, the sealing scheme of the inner pot is simplified through locking between the rigid member and the rigid pot edge, the cover closing scheme of the whole cooking appliance is also simplified, and particularly, the connection stability and controllability between the outer cover of the pot cover and the pot base in the cooking process are improved; the second locking mechanism is used for locking and connecting the inner pot with the pot base when the inner pot is placed on the pot base before closing the cover, so that the outer cover is stably covered on the pot base through the connection relation between the outer cover and the rigid member and the locking relation between the rigid member and the rigid pot edge, and the inner pot can be directly placed on the pot base in a correct posture, so that the normal use of the cooking utensil is ensured.

The method for opening and closing the pot cover and the inner cover of the cooking utensil with the separated safety locking structure comprises the following steps: when the inner pot 11 is placed on the pot base 1 before closing the cover, the inner pot 11 and the pot base 1 are locked, and then the rigid member 22 and the rigid pot edge 110 are locked to complete the double-locking mechanism in response to a cover closing command action allowing the cover to be turned over, so that the cover is turned over; in response to an allowable uncap command, the lock between the rigid member 22 and the rigid pan rim 110 is released to effect one-touch uncapping. After the one-touch cover is completed, the lock between the inner pan 11 and the pan base 1 is released in response to an instruction to allow the inner pan 11 to be opened, so that the inner pan 11 can be taken out. Of course, the lock between the inner pan 11 and the pan base 1 may be released simultaneously when the lock between the rigid member 22 and the rigid rim 110 is released in response to an allowable opening command.

Claims

1. The cooking utensil comprises a cooker base, an inner cooker arranged on the cooker base and a cooker cover hinged on the rear end part of the cooker base in a turnover manner, wherein the inner cooker is provided with a rigid cooker edge protruding outwards, the cooker cover comprises an outer cover and a rigid member arranged below the outer cover, and the cooker cover is used for covering a cooker opening of the inner cooker when being based on a cover closing action; the double-lock mechanism is characterized in that the double-lock mechanism is arranged, and the double-lock mechanism is used for locking the rigid member and the rigid pot edge and locking the inner pot and the pot base under the condition that the pot base and the pot cover are combined; the second locking mechanism comprises a pair of upper and lower hooks capable of realizing mutual hooking, the upper hooks are arranged on the inner pot, and the lower hooks are arranged on the pot base; or the second locking mechanism comprises a pair of magnets which can realize mutual magnetic attraction, and the pair of magnets are respectively arranged on the inner pot and the pot base; when the inner pot is placed on the pot base before closing the cover, the second locking mechanism locks the inner pot and the pot base, and then responds to a cover closing instruction action allowing the cover to be turned over, and locks the rigid member and the rigid pot edge to complete the double-locking mechanism so as to realize the cover turning over and closing; in response to an allowable uncapping instruction, at least unlocking between the rigid member and the rigid rim to effect one-touch uncapping.

2. The opening and closing method of claim 1, wherein after the one-touch opening is completed, the locking between the inner pot and the pot base is released to enable the inner pot to be taken out in response to an instruction to allow the inner pot to be opened.

3. The opening and closing method according to claim 1, wherein the locking between the rigid member and the rigid rim is automatically released by a driving force provided by the opening command in response to an allowable opening command to thereby effect one-touch opening.

4. The opening and closing method according to claim 1, wherein the unlocking action between the rigid member and the rigid rim is limited by the pressure or temperature of the air in the inner pot, and when the pressure or temperature of the air in the inner pot is higher than a threshold value, the unlocking action between the rigid member and the rigid rim is limited by a self-locking mechanism.

5. The method of opening and closing according to claim 4, wherein the self-locking mechanism comprises a self-locking post provided on the rigid member, the self-locking post limiting an unlocking action between the rigid member and a rigid rim in response to an intra-boiler pneumatic pressure or temperature of the inner boiler.

6. The opening and closing method according to claim 1, wherein the rigid member is an inner lid of the lid for covering a mouth of the inner pot upon a closing action.

7. The opening and closing method according to any one of claims 1 to 6, further comprising a first locking mechanism that locks the rigid member and the rigid rim in response to a lid closing action command; and an unlocking device is arranged, and transmits an uncovering instruction to drive the first locking mechanism to unlock the rigid member and the rigid pot edge.

8. The opening and closing method according to claim 7, further comprising a central controller and a position sensor, wherein a position signal that the first locking mechanism and the second locking mechanism are in place is sensed by the sensors, and the position signal is fed back to the central controller, and the central controller determines whether to start heating or pressurizing according to the position signal.

9. The method of claim 8, further comprising a display through which an analog signal that the double lock mechanism has been performed in place is displayed.