CN211093360U - Cooking appliance with holding structure - Google Patents

Abstract

A cooking utensil with a holding structure, the cooking utensil comprises a pot base, an inner pot placed on the pot base and a pot cover which is hinged on the rear end position of the pot base in a turnover mode, the inner pot is provided with a rigid pot edge protruding outwards, the pot cover comprises an outer cover and a rigid component arranged below the outer cover, and the pot cover is used for covering a pot opening of the inner pot when the pot cover is closed; the cooker is characterized in that the outer cover is provided with a locking mechanism, the locking mechanism comprises at least one pair of supporting frames which are arranged on the outer cover in a sliding way, the supporting frames are provided with at least one rigid clamper with a clamping opening, and the rigid clamper is used for clamping a rigid member and a rigid cooker edge of the inner cooker; the middle transition arm body can drive the support frame to move towards the outer side direction of the outer cover when moving forwards so that the rigid clamp holder is separated from the rigid component and the rigid pot edge of the inner pot to realize unlocking, and the support frame is allowed to move towards the center direction of the outer cover when moving backwards so as to realize locking.

Description

Cooking appliance with holding structure

Technical Field

The present invention relates to a cooking appliance that may be used for cooking food, and more particularly, to a cooking appliance having a retaining structure.

Background

The pressure cooker belongs to common kitchen cooking appliances in daily life, and utilizes the principle that the boiling point of liquid rises along with the rise of air pressure to create a high-pressure cooking environment in a food cooking cavity of the pressure cooker, thereby achieving the effect of accelerating the food cooking speed. The air pressure in the food cooking cavity is very high, often up to above 4 KPa. If the cover of the pressure cooker is opened accidentally under the action of the high-pressure expansion force, serious injury is inevitably caused to a user. In order to avoid accidents, the conventional solution is to provide a plurality of upper rotating teeth arranged at intervals on the outer edge of the pot cover, provide lower rotating teeth matched with the upper rotating teeth on the top of the pot base, and tightly lock the pot cover to the pot base through the screwing combination between the upper rotating teeth and the lower rotating teeth. However, such a structure limits the pot cover and the pot base to be installed only in a rotating way, and the pot cover and the pot base to be in a separated structure. Therefore, the pot cover is not only arranged on the pot base, but also detached from the pot base, and the pot cover can be operated by using two hands, which is very inconvenient.

In order to solve the above problems, a clip-type cover structure has been proposed. A cooking utensil with a safety cover, such as that disclosed in patent 201820047685.9, comprises a pot body and a pot cover, wherein the upper end opening part of the pot body is provided with a flange. The pot cover is provided with a connecting rod capable of moving in the radial direction, the connecting rod is provided with a clamp, and the clamp can move in the radial direction to be matched with the flange. In order to facilitate the radial movement of the connecting rod 5 operated by a user, a motor 6 is arranged on the pot cover 2, and an output shaft of the motor 6 is connected with a transmission gear 7. A rack 504 is arranged at the inner end of the connecting rod 5, and the transmission gear 7 is in meshing transmission with the rack 504. When the motor 6 works, the connecting rod 5 is driven to move along the radial direction of the pot cover 2, and the clamp 501 is locked or unlocked with the flange 101.

Disclosure of Invention

The clamp of patent 201820047685.9 is moved by the motor drive. Since the motor is not provided with a self-locking mechanism, if the motor accidentally collides with the clamp, the clamp can be driven reversely to move to the locking position, and the next cover closing operation is influenced certainly. In view of the above, one of the objectives of the present invention is to further improve the lid locking mechanism of the cooking appliance, which not only can achieve smooth opening but also can smoothly close the lid.

In view of the shortcomings of the prior art, the present invention provides a cooking appliance with a holding structure, the cooking appliance comprises a pan base, an inner pan placed on the pan base, and a pan cover hinged on the rear end position of the pan base in a turnover manner, wherein the inner pan is provided with a rigid pan edge protruding outwards, the pan cover comprises an outer cover, a rigid member installed below the outer cover, and the pan cover is used for covering a pan opening of the inner pan when based on a cover closing action; the cooker is characterized in that a locking mechanism is arranged on the outer cover, the locking mechanism comprises at least one pair of supporting frames which are arranged on the outer cover in a sliding manner, at least one rigid clamp holder with a clamping opening is arranged on each supporting frame, and the rigid clamp holder is used for clamping the rigid member and the rigid cooker edge of the inner cooker; the middle transition arm body can drive the support frame to move towards the outer side direction of the outer cover when moving in the forward direction so as to enable the rigid clamp holder to be separated from the rigid component and the rigid pot edge of the inner pot to realize unlocking, and allow the support frame to move towards the center direction of the outer cover when moving in the reverse direction so as to realize locking; the middle transition arm body is used for moving forward to a proper position, and the middle transition arm body can be kept at an unlocking position.

Wherein, the locking mechanism comprises at least one pair of supporting frames which are arranged on the outer cover in a sliding way, and at least one rigid clamper with a clamping opening is arranged on the supporting frames, and the characteristics define that the locking mechanism can comprise two or three or four or even more supporting frames. And one or two, three or even more rigid clamps can be arranged on each support frame. The rigid holder may be provided with one nip or with a plurality of nips. The rigid component and the rigid pot edge of the inner pot can be clamped simultaneously through the same clamping opening on the same rigid clamping device; or one clamping opening on the same rigid clamping device is used for clamping the rigid component, and the other clamping opening is used for clamping the rigid pot edge of the inner pot. There are various clamping schemes for the rigid clamp, which are not described herein in detail.

The unlocking and holding mechanism can hold the intermediate transition arm body at an unlocking position, and the intermediate transition arm body cannot move under the holding action of the unlocking and holding mechanism.

According to the technical scheme, compared with the prior art, the intermediate transition arm body can be kept at the unlocking position after the intermediate transition arm body is positively moved to the proper position by the unlocking and keeping mechanism, so that the intermediate transition arm body can be kept at the unlocking position under the action of the unlocking and keeping mechanism, and the rigid clamp holder is separated from the rigid member and the rigid pot edge of the inner pot and kept at the unlocking position. Therefore, even if the rigid clamp is subjected to external force, the rigid clamp is not easy to move towards the center direction of the outer cover and is switched to the locking position by mistake, so that the next closing operation of the pot cover is influenced. Therefore, the cover can be opened smoothly and closed smoothly.

As for the unlocking holding mechanism, a solution can be further adopted in which the unlocking holding mechanism includes a movable positioning column movably disposed on the intermediate transition arm body, a holding spring disposed between the intermediate transition arm body and the movable positioning column and capable of driving the movable positioning column to move downward, a receiving hole disposed on the outer cover for receiving one end of the movable positioning column, and a projection disposed on the pan base and facing the receiving hole; when the pot cover is closed, the protrusion can be inserted into the receiving hole to push the movable positioning column out of the receiving hole, at the moment, the middle transition arm body loses the holding force and moves reversely and carries the movable positioning column to leave the receiving hole, when the middle transition arm body moves forwards and completes unlocking, the pot cover starts to turn up, and the movable positioning column not only moves above the receiving hole but also is reinserted into the receiving hole under the driving of the holding spring to enable the middle transition arm body to be held at an unlocking position.

The technical scheme is that the device further comprises a button, wherein the button is used for providing positive movement moment for the middle transition arm body and driving the middle transition arm body to move in the positive direction so as to drive the pair of support frames to move away from each other relatively.

In order to drive the support frame to move towards the center direction of the outer cover and keep the rigid clamper on the support frame in a clamping state, the outer cover clamping device further comprises a locking driver, wherein the locking driver is used for driving the support frame to move towards the center direction of the outer cover, and the locking driver is a tension spring with a reset driving force. According to the technical scheme, the tension spring can enable the rigid clamp holder on the support frame to move towards the center direction of the outer cover and keep in a clamping state, but the tension spring cannot prevent the middle transition arm body from moving forwards to drive the support frame to move towards the outer side direction of the outer cover. In addition, the tension spring enables the pair of support frames to form a flexible connection relationship, so that the rigid clamp holder can flexibly adjust the clamping position to clamp the rigid member and the rigid pot edge of the inner pot in a matching manner, and the potential safety hazard caused by the fact that the rigid clamp holder cannot clamp the rigid member and the rigid pot edge of the inner pot due to the existence of assembly errors or manufacturing errors is avoided.

The mounting structure of the tension spring can be further selected from one of the following embodiments:

first installation structure embodiment of tension spring: the two ends of the tension spring are respectively connected to the pair of support frames arranged left and right, the middle transition arm body directly abuts against the pair of support frames arranged left and right or abuts against the pair of support frames arranged left and right through the pair of swing arms respectively, when the middle transition arm body has a forward movement moment and moves forward, the pair of support frames can be driven to move away from each other relatively, namely move towards the outer side direction of the outer cover, and the tension spring is driven to expand for energy storage, on the contrary, when the middle transition arm body loses the moment of the forward movement, the tension spring can drive the pair of support frames to move close to each other relatively, namely move towards the center direction of the outer cover, and the power of the pair of support frames moving close to each other can reversely drive the middle transition arm body to move reversely.

Second installation structure embodiment of tension spring: one end of the tension spring is connected with the outer cover, the other end of the tension spring is connected with the middle transition arm body, the middle transition arm body is movably connected with the support frame or is movably connected with the support frame through a swing arm respectively, when the middle transition arm body has positive movement moment and moves in the positive direction, the support frame can be driven to move towards the outer side direction of the outer cover and drive the tension spring to open for energy storage, otherwise when the middle transition arm body loses the moment of positive movement, the tension spring can drive the pair of support frames to move towards the center direction of the outer cover and can also drive the middle transition arm body to move in the reverse direction.

If the cover is opened suddenly when the cooking environment in the inner pot is in a high-pressure state or a high-temperature state, food in the inner pot can be sprayed out to scald a user, and even the cover is blown out under the action of high pressure to injure the user, which is very dangerous, so that the opening condition of the cover is limited. In view of this, a further technical solution may also be that a self-locking mechanism capable of responding to the air pressure or temperature in the inner pot is further disposed on the pot cover, the self-locking mechanism includes a self-locking column, a self-locking hole capable of receiving the self-locking column is disposed on the middle transition arm body or the support frame, and the self-locking column is used for inserting into the self-locking hole when the pressure or temperature of the air pressure in the pot of the inner pot is higher than a threshold value, so that the middle transition arm body or the support frame cannot move on the outer cover to achieve self-locking. By the technical scheme, when the pressure or the temperature in the cooker of the inner cooker is higher than a threshold value, the movement of the middle transition arm body or the support frame is limited by the self-locking column, and the cooker cover cannot be opened at the moment. Only when the pressure or the temperature of the pressure in the cooker of the inner cooker is lower than a threshold value, the self-locking column is separated from the self-locking hole to release the movement of the middle transition arm body or the support frame, and then the cooker cover can be opened. Therefore, the use safety performance of the cooking appliance is effectively improved.

The further technical scheme can also be that the rigid component forms an inner cover of the pot cover, or the inner cover is arranged below the rigid component and used for covering the pot opening of the inner pot based on a cover closing action.

The further technical proposal can also be that one clamping opening edge of the rigid clamping device is tightly attached to the upper surface of the outer edge part of the rigid member and moves left and right along with the support frame on the upper surface of the outer edge part of the rigid member.

The technical scheme can be that a column with threads is arranged on the outer cover, the column penetrates through the support frame above the outer cover, a jacking screw is screwed on the top end of the column, a spring sleeve is further sleeved on the column, a jacking spring is arranged between the spring sleeve and a screw head of the jacking screw, and the spring sleeve is jacked on the support frame, so that one clamping opening edge of the rigid clamping device is kept to be tightly attached to the upper surface of the outer edge part of the rigid component. According to the technical scheme, the jacking spring is limited to be compressed between the spring sleeve and the screw head of the jacking screw, the spring sleeve is jacked downwards to enable one clamping opening edge of the rigid clamping device to be kept tightly attached to the upper surface of the outer edge of the rigid component, and the supporting frame and the outer cover can be flexibly connected. When the inner cover floats upwards due to high-pressure expansion in the cooking pressurization process, the inner cover can float upwards by driving the support frame to resist the elastic jacking force of the jacking spring through the rigid clamp holder, and the high-pressure expansion force cannot act on the outer cover so as to avoid the outer cover from seriously deforming.

Since the present invention has the above-mentioned features and advantages, it can be applied to cooking appliances, and more particularly, to a cooking appliance having a holding structure.

Drawings

FIG. 1 is a schematic top view of a cooking device with a dual security lock incorporating aspects of the present invention;

FIG. 2 is a schematic sectional view taken along the line A-A in FIG. 1;

FIG. 3 is a schematic cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 is a schematic cross-sectional view taken along the line 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 pot cover 2, in which the decorative cover 23 is omitted;

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

fig. 8 is a schematic structural view of a rigid holder 4 'having a grip, and the broken lines respectively show a rigid member 22, a rigid pot rim 110 and a flange 1a on the pot base 1 which are simultaneously held by the rigid holder 4';

fig. 9 is a schematic structural view of a rigid holder 4 "having two jaws, wherein the broken line part shows the rigid member 22, the rigid pot rim 110 and the outward flange 1a of the pot base 1, which are respectively held on the two jaws of the rigid holder 4';

fig. 10 is a flowchart for controlling the cooking appliance to start heating or pressurizing.

Detailed Description

As shown in the figures, the invention provides a cooking appliance with a double safety locking structure, which comprises a pot base 1, an inner pot 11 placed on the pot base 1 and a pot cover 2 which is hinged on the rear end position of the pot base 1 in a turnover mode, wherein the pot cover 2 is used for covering a pot opening of the inner pot 11 when a cover closing action is performed. Wherein the inner pot 11 is provided with a rigid pot edge 110 protruding outwards, the pot cover 2 comprises an outer cover 21, a decorative surface cover 23 arranged on the outer cover 21, and a rigid member 22 arranged under the outer cover 21, and the rigid member 22 is used for bearing or sharing the air pressure in the inner pot 11. In the present embodiment, the rigid member 22 forms an inner lid of the pot lid 2, but in other embodiments, an inner lid may be mounted below the rigid member 22. The inner lid is used for covering the pot mouth of the inner pot 11 based on a closing action. The pot cover is characterized by further comprising a locking mechanism, wherein the locking mechanism is used for completing a double-locking mechanism, and the double-locking mechanism comprises the step of locking the rigid member 22 and the rigid pot edge 110 and locking one of the outer cover 21, the rigid member 22 or the rigid pot edge 110 and the pot base 1 under the environment that the pot base 1 and the pot cover 2 are closed. The locking mechanism is used for responding to a cover closing instruction action of the pot cover 2 for allowing the cover to be turned over and closed, automatically completing the double-locking mechanism so as to realize one-time cover turning and closing, and is also used for responding to an allowed cover opening instruction, automatically releasing the double-locking mechanism so as to realize one-key cover opening; the unlocking device is used for transmitting an uncovering instruction and driving the locking mechanism to release the double-lock mechanism. Wherein, an allowed uncapping instruction is a command or behavior action expressing an uncapping requirement. The automatic unlocking of the double-lock mechanism of the pot cover to realize one-key uncovering refers to the automatic unlocking of the locking relationship which limits the opening of the pot cover in the double-lock mechanism, and comprises the following locking relationships: a first locked relationship releasing the locking between the rigid member and the rigid rim; a second locking relationship unlocking between one of the outer lid or rigid member and the pan base. The first locking relationship and the second locking relationship may be released simultaneously or sequentially in time. The 'one key' in the one-key uncapping refers to an uncapping instruction, an uncapping action expressing an uncapping instruction or a key for executing an uncapping instruction. The one-key uncapping is to complete the unlocking of the double-lock mechanism after responding to an uncapping instruction.

The structure of the cooking utensil with the double safety locking structure applying the technical scheme of the invention is further described with reference to the accompanying drawings.

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

The unlocking device 200 comprises an intermediate transition arm body 5 movably arranged on the outer cover 21, wherein the intermediate transition arm body 5 is associated with the supporting frames (3, 3 a), and specifically, the intermediate transition arm body 5 indirectly abuts against the supporting frames (3, 3 a) through a pair of swing arms (51, 52). In other embodiments, the intermediate arm 5 may directly abut against a pair of the support frames (3, 3 a). When the middle transition arm body 5 has positive movement moment in response to a door opening command and moves in a positive direction, the support frames (3, 3 a) can be driven to move relatively away from the movement, namely move towards the outer side direction of the outer cover 21, and the tension spring 6 is also driven to expand to store energy. When the middle transition arm body 5 loses the positive movement moment in response to the cover 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) moving relatively close to each other can reversely drive the middle transition arm body 5 to move reversely.

Further, the outer cover 21 and the intermediate transition arm 5 are respectively provided with second magnets (not shown in the drawings) capable of attracting each other, when the intermediate transition arm 5 loses the forward movement moment in response to the cover closing action, the intermediate transition arm 5 will bear a dual driving force capable of driving the intermediate transition arm to move in the reverse direction, one driving force is derived from the magnetic attraction driving force of the second magnets, 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 middle transition arm body 5 to move reversely.

In addition, in other embodiments, the tension spring may adopt another mounting structure, 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 middle transition arm 5 ', and the middle transition arm 5' is movably connected to the supporting frames (3 ', 3 a'). The movable connection structures between the middle transition arm body 5 'and the support frames (3' and 3a ') are various, for example, inclined sliding grooves (30' and 30a ') are respectively arranged on the support frames (3' and 3a '), and shifting arms (51' and 52 ') respectively extending into the sliding grooves (30' and 30a ') are arranged on the middle transition arm body 5'. When the middle transition arm body 5 ' has positive movement moment and moves in the positive direction, the sliding grooves (30 ', 30a ') and the shifting arms (51 ', 52 ') can be matched to drive the pair of supporting frames (3 ', 3a ') to move towards the outer side direction of the outer cover 21 ' and drive the tension spring 6 ' to expand for energy storage. On the contrary, when the middle transition arm body 5 'loses the positive movement moment in response to the cover closing action, the tension spring 6' can drive the middle transition arm body 5 'to move reversely, and meanwhile, the sliding grooves (30', 30a ') and the shifting arms (51', 52 ') are matched to drive the supporting frames (3', 3a ') to move relatively close to each other, namely to move towards the center direction of the outer cover 21'. In other embodiments, the intermediate transition arm 5 ' may be movably connected to the supporting frames (3 ', 3a ') by swing arms.

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 in the clamping state, but the tension spring 6 can not prevent the middle 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 spring 6 flexibly connects the pair of support frames (3, 3 a), which is beneficial for the rigid clamp holder 4 to flexibly adjust the clamping position to clamp the rigid member 22 and the rigid pot edge 110 of the inner pot 11 in a matching way, and avoids the increase of potential safety hazard caused by the rigid clamp holder 4 not clamping the rigid member 22 and the rigid pot edge 110 of the inner pot 11 due to the existence of assembly error, manufacturing error or deformation of the rigid member 22 and the rigid pot edge 110 of the inner pot 11 in the using process, so the technical scheme can improve the operation stability and the use safety of the cooking utensil and reduce the false operation of the equipment operation.

Besides the tension spring, in other embodiments, the locking driver may be a pair of first magnets (not shown) that can attract each other, and the pair of first magnets are respectively disposed on a pair of left and right support frames (3, 3 a). When the middle transition arm body 5 has a 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 by resisting the mutual magnetic attraction force between the first magnets, and when the middle transition arm body loses the moment of the forward movement in response to the cover closing action, the first magnets can drive the support frames (3, 3 a) to move relatively close to each other, namely, to move towards the central direction of the outer cover 21, and can also drive the middle transition arm body 5 to move reversely.

As shown in fig. 3, 5 and 6, the connection relationship between a pair of the supporting frames (3, 3 a) and the outer cover 21 is the same, and the connection relationship between the supporting frame 3 and the outer cover 21 is described as an example. Two left and right separated avoidance notches (210, 211) are arranged at the left side position of the outer cover 21. Wherein the rigid holder 4a is arranged in the escape notch 210, the upper jaw edge 41 of the rigid holder 4a is arranged above the rigid member 22, and the lower jaw edge 42 is arranged below the rigid member 22. Threaded columns (212 and 213) are arranged on the outer cover 21, the columns (212 and 213) respectively penetrate through the support frame 3 above the outer cover 21, jacking screws (31 and 32) are respectively screwed on the top ends of the columns (212 and 213), spring sleeves (33 and 34) are respectively sleeved on the columns (212 and 213), jacking springs (35 and 36) are respectively arranged between the spring sleeves (33 and 34) and screw heads of the jacking screws (31 and 32), and the spring sleeves (33 and 34) are jacked on the support frame 3 so that the upper clamping opening edge 41 of the rigid clamping device 4a is kept tightly attached to the upper surface of the outer edge part of the rigid component 22 and moves left and right along with the support frame 3 on the upper surface of the outer edge part of the rigid component 22. According to the technical scheme, the jacking springs (35, 36) are limited to be compressed between the spring sleeves (33, 34) and the screw heads of the jacking screws (31, 32) to jack the spring sleeves (33, 34) downwards, so that the upper clamping opening edge 41 of the rigid clamping device 4a is kept to be tightly attached to the upper surface of the outer edge part of the rigid component 22, and thus, during assembly, the upper surface of the outer edge part of the rigid component 22 can provide a positioning reference for the assembly positioning of the rigid clamping device 4 a. In addition, the consumption of the rigid clamp 4a is reduced, and the cost is reduced. Secondly, a flexible connection between the support frame 3 and the outer cover 21 can be formed. When the inner cover floats upwards under the pushing of the high-pressure expansion force in the cooking pressurization process, the rigid component 22 can drive the support frames (3 and 3 a) to float upwards by resisting the elastic jacking force of the jacking springs (35 and 36) through the rigid clamp holder 4c, 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 the outer cover 21 is prevented from being seriously deformed after being stressed. The rigid holder 4b is provided in the relief notch 211, and the upper holder 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 locking mechanism further includes a second locking mechanism 100a, the second locking mechanism 100a includes a pair of upper and lower hooks (8, 8 a) capable of realizing mutual hooking, the upper hook 8 is disposed on the outer cover 21, and the lower hook 8a is rotatably disposed on the pan base 1. The pair of upper and lower clasps (8, 8 a) can be hooked to each other in response to not only a closing operation but also an opening operation command transmitted from the unlocking device 200. The intermediate transition arm 5 is associated not only with the support (3, 3 a) but also with the upper and lower clasps (8, 8 a). The middle transition arm body 5 is used for responding to a door opening instruction and has a positive movement moment, and when the middle transition arm body moves in the positive direction, the middle transition arm body can drive the support frames (3 and 3 a) to move towards the outer side direction of the outer cover 21 and can also drive the pair of upper and lower clasps 8a to be unhooked; the middle transition arm 5 is also used for allowing the support frame (3, 3 a) to move towards the center of the outer cover 21 when the normal movement moment is lost and the movement is reversed in response to the cover closing action, and releasing the pair of the upper and lower clasps (8, 8 a) to hook the upper and lower clasps. According to the technical scheme, the actions of the support frames (3, 3 a) and the upper and lower clasps (8, 8 a) can be indirectly controlled by controlling the middle transition arm body 5, so that the clamping state of the rigid clamp 4 on the support frames (3, 3 a) and the hooking state of the upper and lower clasps (8, 8 a) can be controlled. The intermediate transition arm 5 serves as an intermediate transmission member for transmitting an open command to the lock mechanism. In other embodiments, the upper clasp 8 may also be disposed on the rigid member 22.

As shown in fig. 10, the cooking appliance with the double safety locking structure further comprises a central controller (not shown) and a position sensor (not shown) for sensing a position signal that the locking mechanism (100, 100 a) completes the positioning of the double locking mechanism and feeding the position signal back to the central controller, and the central controller is used for determining whether to start heating or pressurizing according to the position signal. Further, the sensor is used for sensing a position signal whether the supporting frame (3, 3 a) or the rigid clamp 4 moves towards the center direction of the outer cover 21 to reach a preset position, and the central controller is used for determining to start heating or pressurizing according to the position signal that the supporting frame (3, 3 a) or the rigid clamp 4 moves towards the center direction of the outer cover 21 to reach the preset position, and otherwise, not starting heating or pressurizing. Through like this central controller can intelligence and effective control cooking utensil's start-up heating or pressurized condition is favorable to cooking utensil guarantees heating or pressurized culinary art effect effectively, satisfies user's culinary art needs, and still be favorable to optimizing cooking utensil's safety in utilization performance. Further, the device also comprises a display, and the display is used for displaying the analog signal that the double-lock mechanism is executed in place. Of course, in other embodiments, the pressure can be controlled not to be started but the heating can be started when the locking mechanism (100, 100 a) does not complete the double locking mechanism, or the pressure can be started but only limited in the micro-pressure range.

The intermediate transition arm 5 is often in a storage state and cannot be directly touched and manipulated, and further, the unlocking device 200 further comprises a button 7, and the button 7 is used for responding to a door opening action command to provide a positive movement moment for the intermediate transition arm 5 and drive the intermediate transition arm 5 to move in a positive direction. Thus, in response to an allowed opening instruction, the double-locking mechanism of the pot cover 2 is automatically released by the driving force provided by the opening instruction, so that one-key opening is realized.

In the above technical solution, the first locking mechanism 100 locks the rigid member 22 and the rigid pot rim 110 in response to a lid closing command, and the second locking mechanism 100a locks the outer lid 21 and the pot base 1 in response to a lid closing command. In other embodiments, only one overall locking mechanism may be provided, which has a structure similar to that of the first locking mechanism 100, except that three, four or more support frames are provided, and the rigid holders on the support frames can simultaneously hold the rigid member 22, the rigid rim 110 of the inner pan 11 and the outward flange 1a of the pan base 1. As shown in fig. 8, the rigid holder 4 ' is provided with a clamping opening 40 ', and the rigid member 22, the rigid rim 110 of the inner pan 11 and the outward flange 1a of the pan base 1 are simultaneously clamped in the same clamping opening 40 '. Or the rigid holder can adopt a structure as shown in fig. 9, for the sake of convenience of distinction, the rigid holder is marked as 4", the rigid holder 4" is provided with two clamping openings, namely a clamping opening 40a "and a clamping opening 40b", wherein the rigid member 22 and the rigid pot rim 110 of the inner pot 11 are simultaneously clamped in the clamping opening 40a ", and the outward flange 1a of the pot base 1 is clamped in the clamping opening 40 b". The main locking mechanism responds to a cover closing instruction action of the pot cover for allowing the pot cover to be turned over and closed, and simultaneously completes a double-locking mechanism so as to realize one-turn-over cover closing. The outer cover 21 is stably covered on the cooker base 1 through the connection relationship between the outer cover and the rigid member 22, which is beneficial to improving the capability of the cooker cover 2 to resist the pressure in the cooker and further improving the use safety of the cooking utensil. This can omit the provision of the second lock mechanism 100 a. It is of course also possible to lock the rigid member 22, the rigid rim 110 of the inner pan 11 by one locking mechanism and the rigid member 22 with the pan base 1 by another locking mechanism. Or the rigid member 22 and the rigid rim 110 of the inner pot 11 are locked by one locking mechanism, the rigid rim 110 and the pot base 1 are locked by the other locking mechanism, the outer cover 21 stably covers the pot base 1 through the connection relationship between the outer cover and the rigid member 22 and the locking relationship between the rigid member 22 and the rigid rim 110, and the inner pot 11 can be directly placed on the pot base 1 in a correct posture, so that the normal use of the cooking utensil is ensured.

If the rigid retainer 4 returns to the locking position before closing the cap after opening the cap, the next cap closing operation is affected certainly, so that the rigid retainer 4 needs to be kept at the unlocking position before closing the cap after opening the cap. In view of this, as shown in fig. 4, the unlocking device 200 further includes an unlocking holding mechanism 300, and the unlocking holding mechanism 300 is used for holding the intermediate transition arm 5 in the unlocking position after the intermediate transition arm 5 loses the positive movement torque. Specifically, the unlocking holding mechanism 300 includes a movable positioning column 9 movably disposed on the intermediate transition arm body 5, a holding spring 91 disposed between the intermediate transition arm body 5 and the movable positioning column 9 and capable of driving the movable positioning column 9 to move downward, a receiving hole 214 disposed on the outer cover 21 for receiving one end of the movable positioning column 9, and a protrusion 12 disposed on the pan base 1 and facing the receiving hole 214. When the lid 2 is closed, the protrusion 12 can be inserted into the receiving hole 214 to push the movable positioning column 9 out of the receiving hole 214, at this time, the middle transition arm body 5 loses the holding force and moves reversely and carries the movable positioning column 9 out of the receiving hole 214, when the middle transition arm body 5 completes unlocking by forward movement, the lid 2 starts to turn up, and the movable positioning column 9 not only moves above the receiving hole 214 but also is inserted into the receiving hole 214 again under the driving of the holding spring 91 to keep the middle transition arm body 5 at the unlocking position. Thus, even if the rigid holder 4 is subjected to an external force, it is not easy to move toward the center of the outer lid 21 and erroneously switches to the locking position, thereby affecting the next closing operation of the lid 2. Therefore, the cover can be opened smoothly and can be closed smoothly. Before the closing instruction action is completed, the state of releasing the double-locking mechanism of the pot cover 2 is kept.

As shown in fig. 4, if the lid 2 is opened suddenly when the cooking environment in the inner pot 11 is under high pressure, the food in the inner pot may be sprayed out to scald the user, and even the lid 2 may be blown out under high pressure to injure the user, which is very dangerous. It is necessary to define the opening condition of the lid 2. In view of this, the unlocking motion between the rigid member 22 and the rigid rim 110 is limited by the pressure inside the pot 11, and when the pressure inside the pot is higher than the threshold value, the unlocking motion between the rigid member 22 and the rigid rim 110 is limited by the self-locking mechanism 400. The self-locking mechanism is arranged on the rigid member 22 of the pot cover 2 and can respond to the air pressure in the inner pot 11. The self-locking mechanism 400 includes a self-locking column 92, the middle 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 also be provided on the support frames (3, 3 a). The self-locking column 92 is used for inserting into the self-locking hole 50 when the pressure of the air in the inner pot 11 is higher than a threshold value, so that the middle transition arm body 5 cannot move on the outer cover 21 to realize self-locking and is kept at a locking position. According to the above technical solution, when the pressure of the air in the inner pot 11 is higher than the threshold value, the movement of the middle transition arm 5 is limited by the self-locking column 92, and at this time, the pot cover 2 cannot be opened. The lid 2 can be opened only when the pressure of the inner pot 11 is lower than the threshold value, and the self-locking column 92 is separated from the self-locking hole 50 to release the movement of the middle transition arm 5. In this way, the self-locking column 92 responds to the pressure in the cooker of the inner cooker to limit the unlocking action between the rigid member 22 and the rigid 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 in the inner pot 11, and when the temperature in 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 a self-locking mechanism.

In order to drive the supporting frames (3, 3 a) to move automatically, in another embodiment, a driving scheme may be adopted, in which the locking mechanism further includes an electric driver disposed on the outer cover 21, the electric driver is in transmission connection with the supporting frames (3, 3 a), and the electric driver 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 cover closing command action and also to move towards the outer side direction of the outer cover 21 in response to the cover opening command transmitted by the unlocking device 200. According to the technical scheme, the support frames (3, 3 a) can be automatically controlled through the electric driver.

According to the above technical solution, it can be found that, compared to the prior art, due to the double locking mechanism provided in the present invention, not only the sealing solution of the inner pot 11 is simplified by the locking between the rigid member 22 and the rigid pot rim 110, but also the lid closing solution of the entire cooking appliance is simplified, and in particular, the stability and controllability of the connection between the outer lid 21 of the pot lid 2 and the pot base 1 during the cooking process are improved. For example, in the scheme of locking the outer cover 21 and the pan base 1, the outer cover 21 is directly and stably covered on the pan base 1, which is beneficial to well controlling the fit clearance between the outer cover 21 and the pan base 1, and the inner pan 11 is placed on the pan base 1 in a correct posture by the pressing of the outer cover 21, so as to ensure the normal use of the cooking utensil. In addition, the double-locking mechanism of the pot cover 2 is automatically released to realize one-key cover opening in response to an allowed cover opening instruction, so that the cover opening and closing operations of the pot cover 2 can be simply and conveniently finished, and the convenient application experience of the cooking utensil is improved.

Claims (10)

1. A cooking utensil having a holding structure, the cooking utensil comprising a pot base, an inner pot placed on the pot base, and a pot cover turnably hinged on a rear end position of the pot base, the inner pot having an outwardly protruding rigid pot rim, the pot cover comprising an outer cover, a rigid member mounted under the outer cover, the pot cover for covering a pot opening of the inner pot upon a closing action; the cooker is characterized in that a locking mechanism is arranged on the outer cover, the locking mechanism comprises at least one pair of supporting frames which are arranged on the outer cover in a sliding manner, at least one rigid clamp holder with a clamping opening is arranged on each supporting frame, and the rigid clamp holder is used for clamping the rigid member and the rigid cooker edge of the inner cooker; the middle transition arm body can drive the support frame to move towards the outer side direction of the outer cover when moving in the forward direction so as to enable the rigid clamp holder to be separated from the rigid component and the rigid pot edge of the inner pot to realize unlocking, and allow the support frame to move towards the center direction of the outer cover when moving in the reverse direction so as to realize locking; the middle transition arm body is used for moving forward to a proper position, and the middle transition arm body can be kept at an unlocking position.

2. The cooking appliance of claim 1, wherein the unlocking retention mechanism comprises a movable positioning post movably disposed on the intermediate transition arm body, a retention spring disposed between the intermediate transition arm body and the movable positioning post and capable of driving the movable positioning post to move downward, a receiving hole disposed on the outer cover for receiving one end of the movable positioning post, and a protrusion disposed on the pan base opposite to the receiving hole; when the pot cover is closed, the protrusion can be inserted into the receiving hole to push the movable positioning column out of the receiving hole, at the moment, the middle transition arm body loses the holding force and moves reversely and carries the movable positioning column to leave the receiving hole, when the middle transition arm body moves forwards and completes unlocking, the pot cover starts to turn up, and the movable positioning column not only moves above the receiving hole but also is reinserted into the receiving hole under the driving of the holding spring to enable the middle transition arm body to be held at an unlocking position.

3. The cooking appliance of claim 1 or 2, further comprising a button for providing a positive movement torque to the intermediate transition arm and driving the intermediate transition arm in a positive direction to drive the pair of support brackets in a relative away-from-movement.

4. The cooking appliance according to claim 1 or 2, further comprising a locking driver for driving the supporting bracket to move toward the center of the outer cover, wherein the locking driver is a tension spring having a return driving force.

5. The cooking appliance according to claim 4, wherein both ends of the tension spring are respectively connected to a pair of the supporting brackets arranged right and left, the middle transition arm body directly abuts against a pair of the support frames arranged left and right or abuts against a pair of the support frames arranged left and right through a pair of swing arms respectively, when the middle transition arm body has positive movement moment and moves positively, the middle transition arm body can drive the pair of support frames to move oppositely and away from the movement, namely move towards the outer side direction of the outer cover and drive the tension spring to expand for energy storage, otherwise when the middle transition arm body loses the moment of positive movement, the tension spring can drive the pair of support frames to move relatively close to each other, namely to move towards the center direction of the outer cover, and the power of the relative approaching movement of the pair of support frames can reversely drive the middle transition arm body to reversely move.

6. The cooking utensil of claim 4, wherein one end of the tension spring is connected to the outer lid and the other end is connected to the middle transition arm, the middle transition arm is movably connected to the supporting frame or is movably connected to the supporting frame through a swing arm, when the middle transition arm has a forward movement moment and moves forward, the supporting frame can be driven to move towards the outer side direction of the outer lid and drive the tension spring to expand to store energy, and when the middle transition arm loses the moment of the forward movement, the tension spring can drive the pair of supporting frames to move towards the center direction of the outer lid and can also drive the middle transition arm to move reversely.

7. The cooking utensil of claim 1 or 2, wherein the lid is further provided with a self-locking mechanism capable of responding to the pressure or temperature in the inner pot, the self-locking mechanism comprises a self-locking column, the middle transition arm body or the support frame is provided with a self-locking hole capable of receiving the self-locking column, and the self-locking column is used for being inserted into the self-locking hole when the pressure or temperature in the pot of the inner pot is higher than a threshold value, so that the middle transition arm body or the support frame cannot move on the outer cover to realize self-locking.

8. The cooking appliance according to claim 1 or 2, wherein the rigid member forms an inner lid of the lid or an inner lid is mounted under the rigid member for covering the mouth of the inner pot upon a closing action.

9. The cooking appliance of claim 1 or 2, wherein one of the jaw edges of the rigid holder rests against the upper surface of the outer edge of the rigid member and moves with the support frame in a side-to-side motion over the outer edge of the rigid member.

10. The cooking utensil as claimed in claim 9, wherein the outer cover is provided with a post with threads, the post passes through the support frame above the outer cover, a jacking screw is screwed on the top end of the post, a spring sleeve is sleeved on the post, a jacking spring is arranged between the spring sleeve and a screw head of the jacking screw, and the spring sleeve is jacked on the support frame so as to keep one clamping edge of the rigid clamping device tightly attached to the outer edge of the rigid component.

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