CN110292304B

CN110292304B - Cooking appliance with rigid holder

Info

Publication number: CN110292304B
Application number: CN201910518214.0A
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: 2024-07-23
Anticipated expiration: 2039-06-14
Also published as: CN110292304A

Abstract

The cooking utensil with the rigid clamp holder comprises a pot base, an inner pot arranged on the pot base and a pot cover hinged to the rear end part of the pot base in a turnover manner, wherein the inner pot is provided with a rigid pot edge protruding outwards, and the pot cover comprises an outer cover and a rigid member arranged below the outer cover and is used for covering a pot opening of the inner pot when the pot cover is closed; the locking mechanism comprises at least one pair of support frames which are arranged on the outer cover in a sliding manner, at least one rigid clamp with a clamp opening is arranged on the support frames, one clamp opening edge of the rigid clamp is clung to the upper surface of the outer edge part of the rigid member and can move left and right along with the upper surface of the outer edge part of the rigid member, the rigid clamp is used for clamping the rigid member and the rigid pot edge of the inner pot when the support frames move towards the center direction of the outer cover along with the support frames, and the rigid clamp is also used for releasing the rigid pot edge of the inner pot when the support frames move towards the outer side direction of the outer cover along with the support frames.

Description

Cooking appliance with rigid holder

Technical Field

The present invention relates to a cooking appliance that can be used to cook food, and more particularly to a cooking appliance having a rigid holder. The inner pot of the cooking utensil can be kept in a covered state by the rigid clamp.

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. In order to facilitate the smooth clamping of the clamp 7 to the inner cover 4 and the inner pot 3 and the smooth detachment from the inner cover 4 and the inner pot 3, gaps are reserved between the upper groove wall of the clamping groove 71 on the clamp 7 and the edge of the inner cover 4, and between the lower groove wall of the clamping groove 71 and the pot edge of 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

Analysis of the technical solution disclosed in the above patent 201710108580.X shows that a gap is required to be reserved between the upper groove wall of the clamping groove and the edge of the inner cover, and between the lower groove wall of the clamping groove and the rim of the inner pot, so that not only the assembly size of the clamping groove but also the manufacturing size of the clamping groove itself are controlled. This undoubtedly increases manufacturing and assembly difficulties and does not take advantage of efficient production of the product. In view of the above technical problems, the present invention aims to provide a novel cooking appliance having a clamping structure that can effectively reduce manufacturing accuracy and assembly accuracy. In view of this, the present invention proposes a cooking appliance having a rigid holder, the cooking appliance comprising a pot base, an inner pot placed on the pot base and a pot cover hinged to a rear end portion of the pot base in a reversible manner, the inner pot having an outwardly protruding rigid rim, the pot cover comprising an outer lid, a rigid member mounted under the outer lid, the pot cover being adapted to cover a mouth of the inner pot upon a closing action; the locking mechanism is characterized by further comprising a locking mechanism, the locking mechanism comprises at least one pair of support 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 support frame, one clamping opening edge of each rigid clamp holder is clung to the upper surface of the outer edge part of the rigid member and can move left and right along with the pair of support frames on the upper surface of the outer edge part of the rigid member, each rigid clamp holder is used for clamping the rigid member and the rigid pot edge of the inner pot when the support frame moves towards the center direction of the outer cover along with the support frame, and each rigid clamp holder is also used for releasing the rigid pot edge of the inner pot when the support frame moves towards the outer side direction of the outer cover along with the support frame.

Wherein the rigid member is a member having certain rigid physical characteristics, such as an inner cap, or a metal ring, etc. The rigid member is used for bearing or sharing the air pressure in the inner pot.

The locking mechanism comprises at least one pair of support frames which are arranged on the outer cover in a sliding mode, and at least one rigid clamp holder with a clamping opening is arranged on each support frame. The above features define that the locking mechanism may comprise two or three, four or even more of the support brackets. And one or two, three or even more rigid holders can be arranged on each support frame. The rigid holder may be provided with one jaw or with a plurality of jaws. The rigid member and the rigid pot edge of the inner pot can be simultaneously clamped through the same clamping opening on the same rigid clamp holder; or the rigid member is clamped by one clamping opening on the same rigid clamp holder, and the rigid pot edge of the inner pot is clamped by the other clamping opening. The rigid holder has a plurality of holding schemes, and the holding schemes are not described in detail herein.

The clamping edge of the rigid clamp is tightly attached to the upper surface of the outer edge part of the rigid member, namely a gap is not required to be reserved between the clamping edge of the rigid clamp and the outer edge part of the rigid member.

According to the technical scheme, compared with the prior art, the invention has the beneficial technical effects that: because the one clamping opening edge of the rigid clamp is tightly attached to the upper surface of the outer edge part of the rigid member, the upper surface of the outer edge part of the rigid member can provide a positioning reference for the assembly positioning of the rigid clamp when in assembly, and compared with the prior scheme for configuring an upper gap and a lower gap, the operation of controlling the assembly size of the rigid member and the rigid clamp in the up-down direction is reduced, and the assembly difficulty is reduced. In addition, the height difference between the clamping opening and the rigid member can be reserved for the rigid pot edge as far as possible, so that the rigid pot edge can be conveniently inserted into the clamping opening.

In order to keep one clamping edge of the rigid clamp tightly attached to the outer edge of the rigid member, a further technical scheme can be adopted, wherein a threaded column 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 the screw head of the jacking screw, and the spring sleeve is jacked on the support frame so that one clamping edge of the rigid clamp is kept tightly attached to the outer edge of the rigid member. According to the technical scheme, the jacking spring is limited between the spring sleeve and the screw head of the jacking screw to downwards jack the spring sleeve, so that one clamping edge of the rigid clamp holder is kept to be clung to the upper surface of the outer edge part of the rigid member, and soft connection can be formed between the support frame and the outer cover. When the inner cover floats upwards due to high-pressure expansion in the cooking pressurization process, the inner cover can drive the supporting 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 that the outer cover is prevented from being severely deformed.

The locking mechanism is used for completing a double-locking mechanism, and the double-locking mechanism comprises the steps of locking the rigid member with the rigid pot edge and locking one of the outer cover or the rigid member with the pot base under the condition that the pot base and the pot cover are combined; the locking mechanism is used for responding to a cover closing instruction action of the pot cover, which allows the cover to be turned over and closed, automatically completing the double-locking mechanism so as to realize the cover turning over and closing, and also used for responding to an allowable cover opening instruction, automatically releasing the double-locking mechanism so as to realize the cover opening by one key; the unlocking device is used for transmitting an uncovering instruction and driving the locking mechanism to release the double-locking mechanism; the supporting frame can move towards the center direction of the outer cover in response to the closing action and can also move towards the outer side direction of the outer cover in response to the opening command transmitted by the unlocking device. According to the technical scheme, due to the double-locking mechanism, compared with the prior art, the sealing scheme of the inner pot is simplified through the 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; for example, in the scheme of locking the outer cover and the pot base, the outer cover is directly and stably covered on the pot base, so that the fit clearance between the outer cover and the pot base is well controlled, and the inner pot is placed on the pot base in a correct posture by means of the top pressure of the outer cover, so that the normal use of the cooking utensil is ensured; in the scheme of locking the rigid member and the cooker base, the outer cover is stably covered on the cooker base through the connection relation between the outer cover and the rigid member, so that the cooker cover is beneficial to improving the capacity of resisting the pressure in the cooker, and further improving the use safety of the cooking utensil; in addition, the cover opening and closing method of the cooking utensil can realize one-turn cover opening and closing and one-key cover opening, so that the cover opening and closing operation of the cooker cover can be simply and conveniently finished, and the convenient application experience of the cooking utensil is improved.

As for the unlocking device, further technical solutions may be adopted, where the unlocking device includes an intermediate transition arm body movably disposed on the pot cover, and the intermediate transition arm body is configured to drive the support frame to move in an outer direction of the outer cover when the intermediate transition arm body has a forward movement moment in response to an instruction of opening the pot cover and moves forward; the intermediate transition arm body is also used for allowing the support frame to move towards the center direction of the outer cover when the forward movement moment is lost and the support frame moves reversely in response to the closing action. According to the technical scheme, the action of the support frame can be indirectly controlled by controlling the middle transition arm body, so that the clamping state of the rigid clamp on the support frame can be controlled. The intermediate transition arm body serves as an intermediate transmission member for transmitting the door opening command to the locking mechanism. When the intermediate transition arm body loses the forward movement moment in response to the closing action, the intermediate transition arm body can actively and reversely move and drive the support frame to move towards the center direction of the outer cover through the reverse movement moment, or can reversely drive the intermediate transition arm body to reversely drive by means of the movement of the support frame towards the center direction of the outer cover.

In order to lock one of the outer cover and the rigid member with the pan base, the locking mechanism may further comprise a pair of upper and lower hooks capable of hooking each other, the upper hooks being disposed on one of the outer cover and the rigid member, the lower hooks being disposed on the pan base, the pair of upper and lower hooks being capable of hooking each other not only in response to a closing operation but also in response to a door opening command transmitted from the unlocking means. According to the technical scheme, one of the outer cover or the rigid member and the pan base can be locked when the pair of the upper and lower hooks are hooked relatively.

Further technical proposal can be that the middle transition arm body is not only related to the supporting frame, but also related to the upper clasp and the lower clasp; the middle transition arm body is used for responding to the uncapping instruction and has forward movement moment, and when the middle transition arm body moves forward, the middle transition arm body not only can drive the support frame to move towards the outer side direction of the outer cover, but also can drive a pair of upper and lower clasp hooks to unhook; the intermediate transition arm body is also used for allowing the support frame to move towards the center direction of the outer cover when the forward movement moment is lost and the support frame moves reversely in response to the closing action, and also can release a pair of the upper clasp and the lower clasp to hook the upper clasp and the lower clasp. Wherein the intermediate transition arm body is capable of releasing a pair of the upper and lower hooks to allow them to be hooked, the above feature defining that the intermediate transition arm body does not hinder the upper and lower hooks from being hooked when the intermediate transition arm body loses a forward movement moment in response to a closing motion.

In order to drive the support frame to move towards the center direction of the outer cover and enable the rigid clamp to keep the clamping state, the locking mechanism further comprises a locking driver, wherein the locking driver is a tension spring with a reset driving force, and the tension spring is used for driving the support frame to move towards the center direction of the outer cover in response to the cover closing action; when the middle transition arm body moves forward, the support frame is driven to move towards the outer side direction of the outer cover, and the tension spring is driven to expand for energy storage. 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 the rigid clamp holder in a clamping state, but the tension spring cannot prevent the intermediate transition arm body from moving forward to drive the support frame to move towards the outer side direction of the outer cover. In addition, the tension spring body enables a flexible connection relation to be formed between the pair of supporting frames, the rigid clamp holder can flexibly adjust the clamping position to be adaptive to clamp the rigid member and the rigid pot edge of the inner pot, potential safety hazards are avoided because the rigid clamp holder cannot clamp the rigid member and the rigid pot edge of the inner pot due to assembly errors or manufacturing errors, and therefore operation stability and use safety of the cooking utensil can be improved, and misoperation of equipment operation is reduced.

As for the mounting structure of the tension spring, one of the following embodiments may be further selected:

The first tension spring mounting structure is implemented as follows: the two ends of the tension spring are respectively connected to a pair of left and right supporting frames, and the middle transition arm body directly abuts against the pair of supporting frames or indirectly abuts against the pair of supporting frames through a pair of swinging arms respectively; when the middle transition arm body loses forward movement moment in response to the closing action, the tension spring can drive the pair of support frames to move relatively close to each other, namely, move towards the center direction of the outer cover, and the power of the pair of support frames to move relatively close to each other can drive the middle transition arm body to move reversely.

The second tension spring mounting structure is implemented as follows: 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, and the middle transition arm body is movably connected with the support frame or is movably connected with the support frame through a swing arm; when the intermediate transition arm body loses forward movement moment in response to the cover closing action, 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 can also drive the intermediate transition arm body to move reversely.

According to a further technical scheme, the unlocking device further comprises a button, and the button is used for responding to the uncapping action instruction to provide forward movement torque for the intermediate transition arm body and drive the intermediate transition arm body to move forward.

The rigid retainer must interfere with the next closing operation if it is returned to the locked position before closing the lid after opening the lid, so it is necessary to keep the rigid retainer in the unlocked position before closing the lid after opening the lid. In view of this further technical solution, the unlocking device may further include an unlocking retaining mechanism for retaining the intermediate transition arm in the unlocking position after the intermediate transition arm loses the forward movement moment. The unlocking position refers to the position that the intermediate transition arm body moves to a position capable of releasing the rigid pot edge in response to an opening instruction. The rigid retainer is capable of being held in an unlocked position when the intermediate transition arm is held in an unlocked position.

As for the unlocking holding mechanism, further technical solutions may be adopted, wherein the unlocking holding mechanism includes a moving positioning column movably provided on the intermediate transition arm body, a holding spring provided between the intermediate transition arm body and the moving positioning column and capable of driving the moving positioning column to move downward, a receiving hole provided on the outer cover for receiving one end portion of the moving positioning column, and a protrusion provided 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 intermediate transition arm body loses the holding force and moves reversely and leaves the receiving hole with the movable positioning column, when the intermediate transition arm body moves forward to finish unlocking, the pot cover starts to turn up, and the movable positioning column moves to the upper side of the receiving hole and is reinserted into the receiving hole under the drive of the holding spring, so that the intermediate transition arm body is kept at the unlocking position.

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

Since the present invention has the above-mentioned features and advantages, it can be applied to a cooking appliance, particularly a cooking appliance having a rigid holder.

Drawings

Fig. 1 is a schematic top view of a cooking appliance with a dual safety locking structure applying the technical scheme of the 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, with the decorative cover 23 omitted;

FIG. 7 is a second mounting configuration of the tension spring;

Fig. 8 is a schematic view of the structure of the rigid holder 4 'with one nip, the broken line parts respectively showing the rigid member 22, the rigid rim 110 and the flange 1a on the pan base 1 which are simultaneously held on said rigid holder 4';

Fig. 9 is a schematic structural view of a rigid holder 4″ having two jaws, the broken line portions showing the rigid member 22, the rigid rim 110 and the flange 1a on the pan 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 drawings, the present invention provides a cooking appliance having a dual safety locking structure, which comprises a pot base 1, an inner pot 11 placed on the pot base 1, and a pot cover 2 hinged on the rear end portion of the pot base 1 in a reversible manner, wherein the pot cover 2 is used for covering a pot opening of the inner pot 11 when a closing action is based. Wherein the inner pot 11 has an outwardly protruding rigid rim 110, the pot cover 2 comprises an outer cover 21, a decorative cover 23 provided on the outer cover 21, a rigid member 22 mounted under the outer cover 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 forms an inner cover of the pot cover 2, and of course, in other embodiments, an inner cover may be mounted below the rigid member 22. The inner lid is adapted to cover the mouth of the inner pot 11 upon a closing action. And a locking mechanism for completing a double locking mechanism, wherein the double locking mechanism comprises locking not only between the rigid member 22 and the rigid pan edge 110, but also one of the outer cover 21, the rigid member 22 or the rigid pan edge 110 and the pan base 1 under the condition that the pan base 1 and the pan cover 2 are covered. The locking mechanism is used for responding to a cover closing instruction action of the pot cover 2 allowing cover turning and closing, automatically completing the double-locking mechanism so as to realize cover turning and closing, and also used for responding to an allowable cover opening instruction, automatically releasing the double-locking mechanism so as to realize one-key cover opening; the double-lock mechanism is characterized by further comprising an unlocking device, wherein the unlocking device is used for transmitting an uncovering instruction and driving the locking mechanism to release the double-lock mechanism. Wherein, an allowable uncap command is a command or action expressing uncap requirements. Wherein, automatically releasing the double-lock mechanism of the pot cover to realize one-key cover opening means automatically releasing the locking relation of limiting the opening of the pot cover in the double-lock mechanism, and the locking relation comprises the following locking relation: a first locking relationship between the rigid member and the rigid rim; and a second locking relationship between one of the outer cover or rigid member and the pan base. The first locking relation and the second locking relation can be released simultaneously or can be released sequentially in time sequence. The "one key" in the one-key cover refers to a cover opening instruction or a cover opening action expressing a cover opening instruction or a key for executing a cover opening instruction. The one-key uncapping is that the double-lock mechanism is released after responding to an uncapping instruction.

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

As shown in fig. 2 and 6, 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) being 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 being 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. Of course, the rigid holder 4 may release the rigid member 22 with an increased travel of the rigid holder 4 in the outer direction of the outer cover 21. 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, the intermediate transition arm 5 being associated with the support frame (3, 3 a), in particular the intermediate transition arm 5 being respectively and indirectly abutted against a pair of support frames (3, 3 a) by means of a pair of oscillating arms (51, 52). In other embodiments, of course, the intermediate transition arm 5 can also bear directly against a pair of 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.

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 in the opposite direction, 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.

In addition, in other embodiments, another mounting structure may be adopted for the tension spring, 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 frames (3 ', 3 a'). The movable connection structure between the intermediate transition arm body 5 'and the supporting frames (3', 3a ') is various, for example, the supporting frames (3', 3a ') are respectively provided with a shifting arm (51', 52 ') which is obliquely arranged to the sliding grooves (30', 30a '), and the intermediate transition arm body 5' is provided with a shifting arm (51 ', 52') which respectively extends 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 ' and drive the tension spring 6 ' to expand and store energy through the cooperation of the sliding grooves (30 ', 30a ') and the shifting arms (51 ', 52 '). Conversely, 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 intermediate transition arm body 5 'to move reversely, and simultaneously, the support frames (3', 3a ') are driven to move relatively close to each other through the cooperation of the sliding grooves (30', 30a ') and the poking arms (51', 52 '), namely, move towards the center direction of the outer cover 21'. 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, the locking driver 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.

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 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 hooking each other, the upper hook 8 is provided on the outer cover 21, and the lower hook 8a is rotatably provided on the pan base 1. The pair of upper and lower hooks (8, 8 a) can be hooked relatively in response to not only the closing operation but also the opening instruction transmitted from the unlocking device 200. The intermediate transition arm 5 is associated not only with the support frame (3, 3 a) but also with the upper and lower clasp (8, 8 a). The intermediate transition arm body 5 is configured to drive the support frames (3, 3 a) to move in an outer direction of the outer cover 21 when having a forward movement moment in response to an opening command, and also to drive a pair of the upper and lower hooks 8a to be unhooked; the intermediate transition arm body 5 is also used for allowing the supporting frames 3, 3a to move towards the center direction of the outer cover 21 when the forward movement moment is lost and the reverse movement is performed in response to the closing action, and also can release the pair of upper and lower hooks 8, 8a to hook the upper and lower hooks. According to the technical scheme, the actions of the supporting 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 supporting 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 the door opening command to the lock mechanism. In other embodiments, the upper clasp 8 may also be provided on a rigid member 22.

As shown in fig. 10, the cooking appliance with the dual safety locking structure further includes a central controller (not shown) and a position sensor (not shown), wherein the position sensor is used for sensing a position signal that the locking mechanism (100, 100 a) is in place when the locking mechanism is completed, and feeding back the position signal 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 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. Therefore, the central controller can intelligently and effectively control the heating or pressurizing starting conditions of the cooking appliance, the cooking appliance is facilitated to have the cooking effect of effectively ensuring heating or pressurizing, the cooking needs of a user are met, and the use safety performance of the cooking appliance is also facilitated to be optimized. Further, a display is included, through which an analog signal that the double lock mechanism has been executed in place is displayed. Of course in other embodiments it is also possible to control that pressurization is not initiated but that heating is initiated when the locking mechanism (100, 100 a) does not complete the double locking mechanism, or that pressurization is initiated but is limited to only the micro-pressure range.

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 double locking mechanism of the lid 2 is automatically released by the driving force provided by the opening command, thereby realizing one-key opening.

In the above-described aspect, the first locking mechanism 100 locks the rigid member 22 and the rigid rim 110 in response to a lid closing command, and the second locking mechanism 100a locks the outer lid 21 and the pan base 1 in response to a lid closing command. In other embodiments, only one general locking mechanism may be provided, which is similar to the first locking mechanism 100 in structure, and is mainly provided with three, four or more supporting frames, and the rigid holder on the supporting frames can simultaneously hold the rigid member 22, the rigid rim 110 of the inner pot 11 and the flanging 1a of the pot base 1. As shown in fig. 8, the rigid holder 4 ' is provided with a nip 40 ', and the rigid member 22, the rigid rim 110 of the inner pan 11 and the flange 1a of the pan base 1 are simultaneously held in the same nip 40 '. Alternatively, the rigid holder may be constructed as shown in fig. 9, and the rigid holder is denoted as 4 "for convenience of distinction, the rigid holder 4" being provided with two jaws, a jaw 40a "and a jaw 40b", respectively, wherein the rigid member 22, the rigid rim 110 of the inner pan 11 are simultaneously clamped in the jaw 40a ", and the flange 1a of the pan base 1 is clamped in the jaw 40 b". The total locking mechanism responds to a cover closing instruction action of the pot cover, which allows the cover to be turned over and closed, and simultaneously completes a double-locking mechanism so as to realize one-touch cover closing, and responds to an allowed cover opening instruction, and simultaneously releases the double-locking mechanism so as to realize one-touch cover opening. The outer cover 21 is stably covered on the pot base 1 through the connection relation between the outer cover and the rigid member 22, which is beneficial to improving the capacity of the pot cover 2 for resisting the pressure in the pot and further improving the use safety of the cooking utensil. This can omit the provision of the second locking mechanism 100 a. It is of course also possible to lock the rigid member 22, the rigid rim 110 of the inner pot 11 by one locking mechanism and the rigid member 22 with the pot base 1 by another locking mechanism. Or one locking mechanism locks the rigid member 22 and the rigid pan edge 110 of the inner pan 11, the other locking mechanism locks the rigid pan edge 110 and the pan base 1, the outer cover 21 is stably covered on the pan base 1 through the connection relation between the outer cover 21 and the rigid member 22 and the locking relation between the rigid member 22 and the rigid pan edge 110, and the inner pan 11 can be directly placed on the pan base 1 in a correct posture, so that the normal use of the cooking utensil is ensured.

The rigid retainer 4 must interfere with the next closing operation if it is restored to the locked position before closing the lid after opening the lid, so it is necessary to keep the rigid retainer 4 in the unlocked 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 and holding mechanism 300 includes a moving positioning column 9 movably provided on the intermediate transition arm body 5, a holding 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 opposite to 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. And before the closing instruction action is implemented, the state of releasing the double-lock mechanism of the pot cover 2 is kept.

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 post 92 thus limits the unlocking action between the rigid member 22 and the rigid rim 110 in response to the pressure of the air pressure in the inner pot, effectively improving the safety of the cooking appliance. 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 above technical solution, it can be found that, compared with the prior art, due to the provision of the double locking mechanism, not only is the sealing solution of the inner pot 11 simplified by the locking between the rigid member 22 and the rigid rim 110, but also the closing solution of the whole cooking appliance is simplified, in particular the stability and controllability of the connection between the outer lid 21 of the lid 2 and the pot base 1 during cooking is 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 favorable for 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 means of the top pressure of the outer cover 21, so as to ensure the normal use of the cooking utensil. In addition, the cover 2 completes the double-lock mechanism to realize one-turn cover closing in response to a cover closing instruction action allowing the cover to be turned over, and the double-lock mechanism of the 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 cover 2 can be completed simply and conveniently, and the convenient application experience of the cooking utensil is improved.

Claims

1. A cooking appliance having a rigid holder, the cooking appliance comprising a pot base, an inner pot placed on the pot base, and a pot cover hinged to a rear end portion of the pot base in a reversible manner, the inner pot having an outwardly protruding rigid rim, the pot cover comprising an outer lid, a rigid member mounted under the outer lid, the pot cover for covering a mouth of the inner pot upon a closing action; the locking mechanism is characterized by further comprising a locking mechanism, wherein 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 with a clamping opening is arranged on the supporting frames, a threaded column is arranged on the outer cover, the column penetrates through the supporting frames above the outer cover, a jacking screw is screwed on the top end of the column, a spring sleeve is sleeved on the column, a jacking spring is arranged between the spring sleeve and the screw head of the jacking screw, the spring sleeve is jacked on the upper surface of the supporting frames, so that one clamping opening edge of the rigid clamp is kept to be clung to the upper surface of the outer edge part of the rigid member, one clamping opening edge of the rigid clamp can move left and right along with the pair of supporting frames on the upper surface of the outer edge part of the rigid member, the rigid clamp is used for clamping the rigid member and the rigid pot edge of the inner pot when the supporting frames move towards the central direction of the outer cover, and the rigid clamp is also used for releasing the rigid pot edge of the rigid pot when the supporting frames move towards the outer cover towards the central direction.

2. The cooking appliance of claim 1, wherein the locking mechanism is configured to complete a double locking mechanism comprising locking not only between the rigid member and the rigid rim, but also one of the outer cover or rigid member and the pan base in an environment where the pan base and the pan cover are closed; the locking mechanism is used for responding to a cover closing instruction action of the pot cover, which allows the cover to be turned over and closed, automatically completing the double-locking mechanism so as to realize the cover turning over and closing, and also used for responding to an allowable cover opening instruction, automatically releasing the double-locking mechanism so as to realize the cover opening by one key; the unlocking device is used for transmitting an uncovering instruction and driving the locking mechanism to release the double-locking mechanism; the supporting frame can move towards the center direction of the outer cover in response to the closing action and can also move towards the outer side direction of the outer cover in response to the opening command transmitted by the unlocking device.

3. The cooking appliance of claim 2, wherein the unlocking means comprises an intermediate transition arm movably provided on the lid, the intermediate transition arm being adapted to drive the support frame to move in an outer direction of the outer lid when moved forward with a forward movement moment in response to an opening command; the intermediate transition arm body is also used for allowing the support frame to move towards the center direction of the outer cover when the forward movement moment is lost and the support frame moves reversely in response to the closing action.

4. A cooking appliance according to claim 3, wherein the locking mechanism further comprises a pair of upper and lower hooks capable of hooking each other, the upper hooks being provided on one of the outer cover and rigid member, the lower hooks being provided on the pan base, the pair of upper and lower hooks being capable of hooking each other not only in response to a closing operation but also unhooking each other in response to an opening command transmitted from the unlocking means.

5. The cooking appliance of claim 4 wherein the intermediate transition arm is associated with not only the support bracket but also the upper and lower clasp; the middle transition arm body is used for responding to the uncapping instruction and has forward movement moment, and when the middle transition arm body moves forward, the middle transition arm body not only can drive the support frame to move towards the outer side direction of the outer cover, but also can drive a pair of upper and lower clasp hooks to unhook; the intermediate transition arm body is also used for allowing the support frame to move towards the center direction of the outer cover when the forward movement moment is lost and the support frame moves reversely in response to the closing action, and also can release a pair of the upper clasp and the lower clasp to hook the upper clasp and the lower clasp.

6. A cooking appliance according to claim 3, wherein the locking mechanism further comprises a locking driver which is a tension spring having a return driving force for enabling the support frame to be driven to move toward the center of the outer lid in response to the closing action; when the middle transition arm body moves forward, the support frame is driven to move towards the outer side direction of the outer cover, and the tension spring is driven to expand for energy storage.

7. The cooking apparatus according to claim 6, wherein both ends of the tension spring are respectively connected to a pair of the support frames arranged left and right, and the intermediate transition arm body directly abuts against a pair of the support frames or indirectly abuts against a pair of the support frames through a pair of swing arms, respectively; when the middle transition arm body loses forward movement moment in response to the closing action, the tension spring can drive the pair of support frames to move relatively close to each other, namely, move towards the center direction of the outer cover, and the power of the pair of support frames to move relatively close to each other can drive the middle transition arm body to move reversely.

8. The cooking appliance of claim 6, wherein one end of the tension spring is connected to the outer cover and the other end is connected to the intermediate transition arm, the intermediate transition arm being movably connected to the support frame or being movably connected to the support frame by a swing arm; when the intermediate transition arm body loses forward movement moment in response to the cover closing action, 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 can also drive the intermediate transition arm body to move reversely.

9. A cooking appliance according to claim 3, wherein the unlocking means further comprises a button for providing a forward movement torque to the intermediate transition arm and driving the intermediate transition arm to move forward in response to an instruction of a door opening action.

10. A cooking appliance according to claim 3, wherein the unlocking means further comprises an unlocking retaining mechanism for enabling the intermediate transition arm to be held in an unlocked position after the intermediate transition arm has lost the forward movement torque.

11. The cooking appliance of claim 10, wherein the unlocking retaining mechanism comprises a moving positioning column movably provided on the intermediate transition arm, a retaining spring provided between the intermediate transition arm and the moving positioning column and capable of driving the moving positioning column to move downward, a receiving hole provided on the outer cover for receiving one end of the moving positioning column, and a protrusion provided 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 intermediate transition arm body loses the holding force and moves reversely and leaves the receiving hole with the movable positioning column, when the intermediate transition arm body moves forward to finish unlocking, the pot cover starts to turn up, and the movable positioning column moves to the upper side of the receiving hole and is reinserted into the receiving hole under the drive of the holding spring, so that the intermediate transition arm body is kept at the unlocking position.

12. Cooking appliance according to claim 2, wherein the rigid member forms an inner lid of the lid or an inner lid is mounted below the rigid member for covering a mouth of the inner pot upon a closing action.