Cooking appliance with unlocking mechanism

Abstract

A cooking utensil with an unlocking mechanism comprises a base, a pot cover, and an inner pot arranged in the base, the inner pot having a rigid pot edge protruding outward, the pot cover being hinged on the base and capable of opening and closing, the pot cover comprising a cover body and a rigid member installed below the cover body; a locking mechanism is arranged on the cover body, the locking mechanism comprising a bracket and a locking claw, the bracket is movably arranged on the cover body, the locking claw is installed on the bracket and can move with the bracket, and the locking claw is used to lock the rigid member and the rigid pot edge of the inner pot when the bracket and the locking claw have completed moving toward the center direction of the cover body, thereby achieving a first level of locking; the beneficial technical effect of the present invention is that the first unlocking block of the unlocking mechanism can drive the bracket and the locking claw to move in the unlocking direction through the first positive driving force F1 provided by the first driving spring, so that the purpose of releasing the first level of locking can be achieved by only using the first unlocking block and the first driving spring, and the unlocking mechanism has a simple and practical structure.

Description

Technical Field

[0001] The present invention relates to the technical field related to food cooking utensils, and in particular to a cooking utensil with an unlocking mechanism. Background Art

[0002] Pressure cookers are common food cooking appliances in daily life. Pressure cookers heat water and food in a sealed state inside the pot. After the water and food are heated, a large amount of water vapor is generated. As the water vapor continues to increase, the pressure inside the pot increases. Under the action of high temperature and high pressure inside the pot, the food can be cooked quickly, greatly shortening the cooking time of the food. However, the pressure inside the pressure cooker is very high. In order to prevent the lid of the pressure cooker from accidentally opening and causing harm to the user during high-pressure cooking, the lid and the base need to be locked. Common methods of locking the lid and the base include a pot-teeth screw-on locking, in which a plurality of spaced upper-spinning pot teeth are arranged on the outer edge of the pot of the lid, and lower-spinning pot teeth matching the upper-spinning pot teeth are arranged on the top of the pot base. The lid is tightly locked to the pot base through the screw connection between the upper-spinning pot teeth and the lower-spinning pot teeth. However, the traditional pressure cooker cover has a limitation that the closing action of the pressure cooker cover must be to close the pressure cooker cover on the cooker base first, and then rotate the cooker cover to allow the upper rotating cooker teeth to be combined and locked with the lower rotating cooker teeth. This operation is relatively cumbersome and brings a bad user experience.

[0003] Another locking method between the pot cover and the inner pot is caliper-type locking. For example, the Chinese invention patent with application number 201910517645.5 discloses a cooking utensil with a retaining structure. The cooking utensil includes a pot base, an inner pot placed on the pot base, and a pot cover hingedly connected to the rear end of the pot base in a flip manner. The inner pot has a rigid pot edge protruding outward. The pot cover includes an outer cover and a rigid member. A locking mechanism is arranged on the outer cover. The locking mechanism includes at least one pair of support frames slidably arranged on the outer cover, and at least one rigid clamp with a clamp is arranged on the support frame. The rigid clamp is used to clamp the rigid member and the rigid pot edge of the inner pot; it also includes a tension spring whose two ends are respectively connected to a pair of support frames arranged on the left and right, and the tension spring can drive a pair of support frames to move toward the center direction of the outer cover to achieve upward movement. The invention relates to a lock; it also includes an intermediate transition arm body movably arranged on the outer cover, which can drive the support frame to move toward the outer side of the outer cover when the intermediate transition arm body moves forward, thereby allowing the rigid clamp to separate from the rigid component and the rigid pot edge of the inner pot to achieve unlocking; it also includes an unlocking holding mechanism, which includes a movable positioning column movably arranged on the intermediate transition arm body, a retaining spring arranged between the intermediate transition arm body and the movable positioning column and capable of driving the movable positioning column to move downward, and a receiving hole arranged on the outer cover for receiving one end of the movable positioning column. When the intermediate transition arm body moves forward to complete the unlocking, the movable positioning column not only moves to the top of the receiving hole but also is reinserted into the receiving hole under the drive of the retaining spring to keep the intermediate transition arm body in the unlocking position. Summary of the invention

[0004] Regarding the caliper-type cooking utensil in Patent 201910517645.5, the pot lid has many parts in the unlocking and holding mechanism, and the structural relationship is complex. The locking method of the movable positioning column and the receiving hole is easy to cause the unlocking and holding mechanism to fail due to improper cooperation, which in turn affects the normal closing of the pot lid.

[0005] In view of the above technical problems, the present invention proposes a new cooking utensil with an unlocking mechanism, the cooking utensil comprising a base, a pot cover, and an inner pot arranged in the base, the inner pot having a rigid pot edge protruding outward, the pot cover being hinged on the base and capable of opening and closing, the pot cover comprising a cover body and a rigid member installed below the cover body; a locking mechanism is arranged on the cover body, the locking mechanism comprising a bracket and a locking claw, the bracket being movably arranged on the cover body, the locking claw being installed on the bracket and being capable of moving with the bracket, the locking claw being used to lock the rigid member and the rigid pot edge of the inner pot to achieve a first locking when the bracket and the locking claw have completed moving toward the center direction of the cover body; the characterised in that the cooking utensil also comprises an unlocking mechanism, the unlocking mechanism being used to apply a driving force to the bracket that can drive the bracket to move in an unlocking direction; the unlocking mechanism comprises a first unlocking block and a second unlocking block movably arranged on the cover body A buffer structure is arranged between the first unlocking block and the second unlocking block, the buffer structure includes a buffer groove and a transmission column that can extend into the buffer groove, the buffer groove is extended in the front-to-back direction, the buffer groove and the transmission column are arranged on the first unlocking block or the second unlocking block, and the first unlocking block and the second unlocking block are connected by transmission through the buffer structure; a first driving spring is arranged between the first unlocking block and the cover body, and a second driving spring is arranged between the second unlocking block and the cover body, the first driving spring is used to provide a first positive driving force F1 in the backward direction to the first unlocking block, the second driving spring is used to provide a second reverse driving force F2 in the forward direction to the second unlocking block, and the first driving spring is used to provide a first positive driving force F1 that can overcome the resistance of the second reverse driving force F2, thereby providing a driving force to the bracket to move in the unlocking direction to release the first heavy lock.

[0006] Among them, the first locking refers to that when the locking claw moves toward the center direction of the cover body, the rigid part and the rigid pot edge of the inner pot are locked, thereby locking the rigid part and the inner pot. Because the rigid part is installed on the cover body, when the first locking is completed, the inner pot is connected to the pot cover through the rigid part.

[0007] Among them, the buffer structure includes a buffer groove and a transmission column that can extend into the buffer groove, the transmission column can move in the buffer groove along the front and rear directions, and the buffer groove and the transmission column are respectively arranged on the first unlocking block or the second unlocking block; the buffer structure includes two basic implementation methods: one implementation method is that the buffer groove is arranged on the first unlocking block, and the transmission column is arranged on the second unlocking block; the other implementation method is that the transmission column is arranged on the first unlocking block, and the buffer groove is arranged on the second unlocking block.

[0008] Among them, the resistance of the second reverse driving force F2 refers to the resisting force that is transmitted by the second reverse driving force F2 generated by the second drive spring to the first unlocking block through the second unlocking block to hinder the first unlocking block from moving in the backward direction. The resistance of the second reverse driving force F2 may be unequal to the second reverse driving force F2; for example, when the resistance direction of the second reverse driving force F2 is not in the same axial direction as the moving direction of the first unlocking block, the resistance of the second reverse driving force F2 is a component force on the axis of the moving direction of the first unlocking block, and at this time, the resistance of the second reverse driving force F2 is less than the second reverse driving force F2.

[0009] According to the above technical scheme, compared with the prior art, the beneficial technical effect of the present invention is that: the first unlocking block of the unlocking mechanism can drive the bracket and the locking claw to move in the unlocking direction through the first positive driving force F1 provided by the first driving spring, so that the purpose of releasing the first heavy locking can be achieved only by the first unlocking block and the first driving spring, and the unlocking mechanism has a simple and practical structure; in addition, under the action of the first positive driving force F1 provided by the first driving spring, the first unlocking block can always drive the bracket and the locking claw in the unlocked state when the pot cover is opened, and the first unlocking block and the second unlocking block do not need to limit the unlocking position of the first unlocking block through an additional limiting structure, so that the locking mechanism is effectively kept in the unlocked state through the simple unlocking mechanism, which greatly reduces the occurrence of unlocking failure of the unlocking mechanism, and at the same time reduces the probability of the locking claw colliding with the rigid pot edge of the inner pot during the closing process of the pot cover and the base, which can provide users with a good use experience.

[0010] In order to better realize or release the first double locking, a further technical solution may be that a first combining arm portion is provided on the first unlocking block, and a second combining arm portion is provided on the second unlocking block, the second combining arm portion and the first combining arm portion are arranged one after the other and have an interval space; it also includes a lock hook rotatably arranged on the base, the lock hook includes a top end, a rotating shaft end and a waist located between the top end and the rotating shaft end, the top end swings based on the rotating shaft end, the top end of the lock hook has a hook-shaped hook arm and the hook arm extends forward; a button is also provided on the base, the button is located in front of the lock hook and a button push rod extending backward is provided on the button, the button push rod is used to transmit a button thrust F3 in the backward direction to the lock hook, and a button counter-spring is also provided between the waist of the lock hook and the base. Spring, the button counter spring is used to provide a counter thrust F4 in the forward direction to the lock hook; when the pot cover is closed on the base, the hook arm is inserted into the interval space, at this time, the hook arm presses the first combined arm part to provide the counter thrust F4 of the button counter spring to the first combined arm part, the button counter spring is used to provide the counter thrust F4 and then superimpose the second reverse thrust F2, overcome the resistance of the first positive thrust F1, so as to drive the first unlocking block to move forward and then drive the bracket and the locking claw to move toward the center direction of the cover body to achieve the first heavy locking; on the contrary, when the button is pressed and the lock hook is deflected toward the rear through the button push rod, the hook arm no longer presses the first combined arm part but presses the second combined part, so that the unlocking mechanism releases the first heavy locking of the locking mechanism. In this way, during the process of closing the pot lid onto the base, the hook arm of the locking hook can press the first combining arm to drive the first unlocking block to move forward, and the first unlocking block drives the bracket and the locking claw to move toward the center direction of the lid body to achieve the locking of the rigid part and the inner pot. The first locking can be achieved simply by closing the pot lid, and the operation is very simple. When opening the pot lid, the first locking can be released by pressing the button to achieve the separation of the rigid part and the inner pot, which greatly improves the convenience of achieving or releasing the first locking, giving the user a good user experience.

[0011] In order to improve the safety of the cooking utensil, a further technical solution may be that a bending portion is provided on the cover body, and the bending portion is used to combine with the hook arm to realize the second locking between the pot cover and the base; the bending portion is arranged below the first combined arm portion, and when the pot cover is closed on the base, the bending portion slides along the inclined surface of the hook arm and first pushes the hook arm to swing backward, and when the pot cover is completely closed, the hook arm extends into the bending portion, not only pushing the first combined arm portion but also hooking the bending portion so that the completion time of the first locking is at least not earlier than the completion time of the second locking; on the contrary, when the button is pressed and the lock hook is deflected toward the rear through the button push rod, the hook arm first no longer presses the first combined arm portion but presses the second combined arm portion, so that the unlocking mechanism first releases the first locking of the locking mechanism, and then the hook arm can be separated from the bending portion to release the second locking after it swings backward by a sufficient angle. Wherein, the second locking refers to locking the pot cover and the base by combining the hook arm with the bent portion, and its function is to buckle the pot cover to the base; wherein, the completion time of the first locking refers to the time required for the locking claw to move from the outer edge direction of the lid to the center direction of the lid body and lock the rigid part and the rigid pot edge of the inner pot during the process of the pot cover being closed to the base; wherein, the completion time of the second locking refers to the time required for the hook arm and the bent portion to be separated and combined during the process of the pot cover being closed to the base. The beneficial effect lies in that the pot cover and the base can be well combined together through the second locking, thereby providing a second safety protection for the user when the cooking utensil is working; further, if the pot cover and the base are unlocked first during the process of opening the pot cover, but the inner pot is still in a locked state with the rigid body, the inner pot will be lifted up by the pot cover, and the food in the inner pot at a high temperature may splash out and cause harm to the user. In the present technical solution, when the hook arm no longer presses the first combining arm portion, the first unlocking block of the unlocking mechanism drives the bracket to move along the unlocking direction under the action of the first positive driving force F1 provided by the first driving spring, firstly realizes the release of the first locking, and then the hook arm disengages from the bending portion to realize the release of the second locking. The release of the first locking before the second locking can effectively prevent the inner pot from being lifted up by the pot cover, thereby greatly improving the safety of the cooking utensil.

[0012] In order to enable the bracket to move better on the cover body, a bracket spring for assisting the movement of the bracket may be further provided on the locking mechanism. The bracket spring may have the following two specific settings.

[0013] In the first setting mode, the locking mechanism further includes a bracket spring, which is arranged between the cover body and the bracket, and the bracket spring is used to generate a locking driving force F5 and drive the bracket and the locking claw to move toward the center direction of the cover body; the first driving spring is used to provide a first positive driving force F1 to overcome the resistance of the second reverse driving force F2 and the resistance of the locking driving force F5, thereby providing the bracket with a driving force to move in the unlocking direction to release the first heavy locking. Among them, the resistance of the locking driving force F5 refers to the force that hinders the first unlocking block from moving backwards, which is transmitted by the locking driving force F5 generated by the bracket spring to the first unlocking block through the bracket; in this way, when the first unlocking block in the unlocking mechanism moves forward, the bracket and the locking claw can move under the drive of the first unlocking block, can also move under the drive of the bracket spring, and can also move under the joint drive of the first unlocking block and the bracket spring, and the bracket spring can assist in driving the bracket and the locking claw to move toward the center direction of the cover body so that the locking mechanism can better achieve the first heavy locking.

[0014] In the second setting method, the locking mechanism also includes a bracket spring, which is arranged between the cover body and the bracket, and is used to generate an unlocking driving force F6 and drive the bracket and the locking claw to move toward the outer edge of the cover body; the button counter-spring is used to provide a counter-thrust force F4 and then superimpose the second reverse thrust force F2, overcoming the resistance of the first forward thrust F1 and the unlocking driving force F6, thereby driving the first unlocking block to move forward and then drive the bracket and the locking claw to move toward the center of the cover body to achieve the first heavy locking. Among them, the resistance of the unlocking driving force F6 refers to the force that hinders the first unlocking block from moving forward and is transmitted by the unlocking driving force F6 generated by the bracket spring to the first unlocking block through the bracket; in this way, the button counter-spring needs to drive the first unlocking block to move forward and realize the first re-locking, and the combined force of the counter-thrust force F4 and the second reverse thrust F2 provided by the button counter-spring needs to overcome the resistance of the first forward thrust F1 and the resistance of the unlocking driving force F6; on the other hand, when the unlocking mechanism releases the first re-locking, the bracket spring can assist the unlocking mechanism in driving the bracket and the locking claw to move toward the outer edge of the cover body to release the first re-locking; and, in the open cover state, the bracket spring is conducive to keeping the bracket and the locking claw in the unlocked state.

[0015] In order to improve the transmission stability of the first unlocking block and the second unlocking block, a further technical solution may be that the second unlocking block is arranged above the first unlocking block, the second unlocking block is in an arch shape and includes two left and right end walls, the second driving spring is respectively arranged between the left and right end walls and the pot cover, and the first unlocking block is arranged below the middle part of the second unlocking block. Wherein, the first unlocking block and the second unlocking block are arranged overlappingly up and down, and the first unlocking block is arranged below the middle part of the second unlocking block, so that it is not only conducive to the arrangement of the buffer structure, but also conducive to the second unlocking block to smoothly transfer the force of the second driving springs at the left and right ends to the first unlocking block through the buffer structure, thereby improving the stability of the first unlocking block and the second unlocking block when moving, and at the same time, the second combining arm can be arranged on the left and right end walls of the second unlocking block to achieve cooperation with the top end of the lock hook.

[0016] In order to facilitate the arrangement of the internal components of the pot cover, a further technical solution may also include a rotating bracket rotatably arranged on the pot cover, and the rotating bracket is arranged between the unlocking mechanism and the locking mechanism to transmit the unlocking torque of the unlocking mechanism to the locking mechanism. In this way, the unlocking mechanism and the locking mechanism can be separated by a relatively long distance by indirectly transmitting the unlocking torque through the rotating bracket, and the strength of the first driving spring can be reasonably adjusted by adjusting the length of the force arm used by the rotating bracket to transmit the unlocking torque, thereby improving the user experience when opening the pot cover.

[0017] In order to prevent the pot cover from being opened by mistake when the inner pot has high pressure or high temperature, thereby causing harm to the user, a further technical solution may be that a locking mechanism that can respond to the air pressure or temperature in the inner pot is also provided on the pot cover, the locking mechanism includes a locking column, and the second unlocking block is provided with a locking part that can cooperate with the locking column. The locking column is used to move to the moving path of the second unlocking block and cooperate with the locking part when the air pressure or temperature in the inner pot is higher than a threshold value, so that the second unlocking block cannot move on the pot cover, and the pot cover is self-locking. In this way, when the inner pot has high pressure or high temperature, the pot cover cannot be opened. Only when the pressure and temperature of the inner pot are reduced to below the threshold value, the pot cover can be opened, which greatly improves the safety of the cooking utensil.

[0018] Since the present invention has the above characteristics and advantages, it can be applied to cooking appliances with an unlocking mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the structure of a pot cover of a cooking utensil with an unlocking mechanism in a viewing direction, showing the internal structure of the pot cover;

[0020] Figure 2 It is a schematic diagram of the structure of a cooking appliance with an unlocking mechanism in the product viewing direction;

[0021] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure in the AA direction;

[0022] Figure 4 yes Figure 3 A schematic diagram of the local structure at M in FIG. 1 , showing the cross-sectional structure of the unlocking mechanism;

[0023] Figure 5 yes Figure 2 Schematic diagram of the cross-sectional structure in the BB direction;

[0024] Figure 6 yes Figure 5 The enlarged schematic diagram of the local structure at N in FIG. 1 shows the cross-sectional structure of the hook arm when the cover is closed;

[0025] Figure 7 yes Figure 2 Schematic diagram of the cross-sectional structure in the CC direction;

[0026] Figure 8 yes Figure 7 The enlarged schematic diagram of the local structure at K in FIG. 1 shows the cross-sectional structure of the locking mechanism when the cover is closed;

[0027] Fig. 9 yes Figure 1 A schematic cross-sectional structure diagram in the DD direction shows a first implementation of the bracket spring;

[0028] Fig.10 yes Figure 1 The cross-sectional structure schematic diagram along the DD direction shows the second implementation method of the bracket spring. DETAILED DESCRIPTION

[0029] The cooking utensil with an unlocking mechanism using the technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0030] The cooking appliance with unlocking mechanism proposed by the present invention is as follows: Figure 1 , Figure 3 and Figure 7As shown, the cooking utensil comprises a base 1 and an inner pot 12 disposed in the base 1, the inner pot 12 having a steel pot edge 121 protruding outward, and the inner pot 12 is used to hold food. The base 1 is also provided with a heating device 13, the heating device 13 is used to heat the inner pot 12 to achieve the purpose of cooking the food in the inner pot 12. The cooking utensil also comprises a pot cover 2, the rear part of the pot cover 2 is hinged to the rear part of the base 1 through the rotating shaft 23, and the pot cover 2 can open and close on the base 1 around the rotating shaft 23. The pot cover 2 comprises a cover body 20 and a rigid member 24 installed below the cover body 20. The pot cover 2 is provided with a locking mechanism, the locking mechanism comprising a pair of brackets (41, 41a) arranged on the left and right, the brackets (41, 41a) being movably arranged on the cover body 20 of the pot cover 2, the locking mechanism further comprising locking claws (42, 42a), the locking claws (42, 42a) being installed on the brackets (41, 41a) and being movable with the brackets (41, 41a), the locking claws (42, 42a) being used to lock the rigid member 24 and the rigid pot edge 121 of the inner pot when the brackets (41, 41a) and the locking claws (42, 42a) have completed moving toward the center direction of the cover body 20, thereby achieving a first locking

[0031] like Figure 1 As shown, the pot cover 2 also includes an unlocking mechanism, which is used to apply a driving force to the bracket (41, 41a) that can drive the bracket (41, 41a) to move along the unlocking direction; the unlocking mechanism includes a first unlocking block 31 and a second unlocking block 21 that are movably arranged on the pot cover, a buffer structure is arranged between the first unlocking block 31 and the second unlocking block 21, and the first unlocking block 31 and the second unlocking block 21 are transmission-connected through the buffer structure; as shown Figure 3 and Figure 4The buffer structure includes a buffer groove 212 and a transmission column 311 that can be inserted into the buffer groove 212. The buffer groove 212 is in the shape of a long strip and extends in the front-to-back direction. The transmission column 311 is inserted into the buffer groove 212 and can move a certain distance in the front-to-back direction. In this embodiment, the buffer groove 212 is arranged on the second unlocking block 21, and the transmission column 311 is arranged on the first unlocking block 31. Of course, the buffer groove 212 and the transmission column 311 can be arranged in various forms. The buffer groove 212 can also be arranged on the first unlocking block 31, and the transmission column 311 is arranged on the second unlocking block 21. Regardless of how the buffer groove 212 and the transmission column 311 are arranged, the first unlocking block 31 and the second unlocking block 21 can be connected by transmission through the buffer structure. A first drive spring 32 is arranged between the first unlocking block 31 and the cover body 20. The first drive spring 32 is used to provide the first positive driving force F1 in the backward direction to the first unlocking block 31. As Figure 1 As shown, the second unlocking block 21 is arranged above the first unlocking block 31. The second unlocking block 21 is arched and includes two left and right end walls (211, 211a). The second driving spring 22 is respectively arranged between the left and right end walls (211, 211a) and the cover body 20. One end of the second driving spring 22 presses against the end wall (211, 211a), and the other end presses against the cover body 20 of the pot lid. The first unlocking block 31 is arranged below the middle part of the second unlocking block 21. Correspondingly, the buffer groove 212 is also correspondingly arranged in the middle part of the second unlocking block 21. The second driving spring 22 is used to provide the second unlocking block 21 with a second reverse driving force F2 in the forward direction. Figure 1As shown, the second reverse thrust F2 is the sum of two forces respectively set on the second drive spring 22 to the left and right end walls (211, 211a) of the second unlocking block 21. The second reverse thrust F2 acts on the second unlocking block 21 and is transmitted to the first unlocking block 31 through the buffer structure to form a resistance of the second reverse thrust F2 that hinders the movement of the first unlocking block. The resistance of the second reverse thrust F2 is in the same axial direction as the first positive thrust F1, so it can be considered that the resistance of the second reverse thrust F2 is the same as the second reverse thrust F2. However, the second drive spring 22 can be set in various ways. In one embodiment, the direction of the second reverse thrust F2 provided by the second drive spring 22 acting on the second unlocking block 21 is not in the same axial direction as the moving direction of the first unlocking block 31. Then, the resistance of the second reverse thrust F2 is a component force of the second reverse thrust F2 in the moving direction of the first unlocking block 31, and the resistance of the second reverse thrust F2 is less than the second reverse thrust F2. When the first driving spring 32 is used to provide the first positive driving force F1 which can overcome the resistance of the second reverse driving force F2, thereby providing the bracket (41, 41a) with a driving force to move in the unlocking direction, the first re-locking is released.

[0032] In order to facilitate the arrangement of the internal components of the pot cover 2, the pot cover 2 also includes a rotating bracket (51, 51a) rotatably arranged on the pot cover 2, a pair of the rotating brackets (51, 51a) are arranged on the left and right, the rotating brackets (51, 51a) are arranged between the unlocking mechanism and the locking mechanism for transmitting the unlocking torque of the unlocking mechanism to the locking mechanism, the rotating bracket (51, 51a) includes a first bracket arm (511, 511a) connected to the locking mechanism and a second bracket arm (512, 512a) connected to the unlocking mechanism, the first driving spring 32 provides a first positive driving force F1 which can act on the first bracket arm (511, 511a) through the first unlocking block 31 to drive the rotating bracket (51, 51a) to rotate, and the rotating bracket (51, 51a) drives the second bracket arm (512, 512a) to provide a driving force to move along the unlocking direction to the bracket (41, 41a), thereby releasing the first heavy locking. In this way, the unlocking torque is transmitted by the rotating bracket (51, 51a) so that the unlocking mechanism and the locking mechanism can be separated by a relatively long distance, and by adjusting the length of the first bracket arm (511, 511a) and the second bracket arm (512, 512a), it is helpful to reasonably adjust the force of pressing the first drive spring 32, so as to improve the user experience when opening the pot cover 2.

[0033] In order to better implement or release the first locking, Figure 6 As shown, a first coupling arm portion 311 is provided on the first unlocking block 31, and a second coupling arm portion 215 is provided on the second unlocking block 21. The second coupling arm portion 215 and the first coupling arm portion 311 are arranged one after the other and have a space therebetween. The cookware also includes a locking hook 6 rotatably arranged on the base 1, the locking hook 6 includes a top end 61, a rotating shaft end 62, and a waist portion 63 located between the top end 61 and the rotating shaft end 62. The top end 61 swings based on the rotating shaft end 62. The top end 61 of the locking hook 6 has a hook-shaped hook arm 611 and the hook arm 611 extends forward. Figure 3 As shown, a button 71 is also provided on the base 1, the button 71 is located in front of the lock hook 6 and is provided with a button top rod 711 extending backward, the button top rod 711 is used to transmit a button thrust F3 in the backward direction to the lock hook 6, a button thrust spring 72 is provided between the button 71 and the base 1, the button thrust spring 72 is used to provide a forward force to the button 71 so as to reset the button 71. A button counter spring 64 is also provided between the waist 63 of the lock hook 6 and the base 1, the button counter spring 64 is used to provide a forward counter thrust F4 to the lock hook 6. When the pot cover 2 is closed on the base 1, the hook arm 611 is inserted into the interval space. At this time, the hook arm 611 presses the first combined arm portion 311 to provide the counter thrust F4 of the button counter spring 64 to the first combined arm portion 311. The button counter spring 64 is used to provide the counter thrust F4 and then superimpose the second reverse thrust F2 to overcome the resistance of the first positive thrust F1, thereby driving the first unlocking block 31 to move forward and then driving the bracket (41, 41a) and the locking claw (42, 42a) to move toward the center direction of the cover body 20 to achieve the first heavy locking; on the contrary, when the button 71 is pressed and the lock hook 6 is deflected toward the rear through the button push rod 711, the hook arm 611 no longer presses the first combined arm portion 311 but presses the second combined portion 212, allowing the unlocking mechanism to release the first heavy locking of the locking mechanism.

[0034] In order to improve the safety of the cooking utensil, a bending portion 201 is provided on the pot cover 2, and the bending portion 201 is used to combine with the hook arm 611 to achieve the second locking between the pot cover 2 and the base 1; the bending portion 201 is arranged below the first combining arm portion 311, and when the pot cover 2 is closed on the base 1, the bending portion 201 slides along the inclined surface of the hook arm 611 and first pushes the hook arm 611 to swing backward, and when the pot cover 2 is closed on the base 1, the hook arm 611 extends into the bending portion 201, and the hook arm 611 not only pushes the first combining arm portion 311 but also hooks the bending portion 201, thereby achieving both the first locking and the second locking, and the completion time of the first locking will at least not be earlier than the completion time of the second locking. On the contrary, when the button 71 is pressed and the button push rod 711 pushes the lock hook 6 to deflect backward, the hook arm 611 first stops pressing the first combined arm portion 311 and presses the second combined arm portion 215, so that the unlocking mechanism first releases the first lock of the locking mechanism, and then the hook arm 611 swings backward to a sufficient angle before it can be separated from the bending portion 201 to release the second lock. In this way, the first lock is released before the second lock during the lid opening process, which can prevent the inner pot 12 from being lifted by the pot lid 2 during the process of opening the pot lid 2, causing the high-temperature food in the inner pot 12 to splash and injure people, thereby greatly improving the safety of the cooking utensil.

[0035] In order to allow the bracket (41, 41a) to move better on the cover body 20, a bracket spring 43 for assisting the bracket (41, 41a) to move can also be provided on the locking mechanism. In the first embodiment, as shown in FIG. Fig. 9 As shown, the bracket spring 43 is arranged between the cover body 20 and the bracket (41, 41a), and the bracket spring 43 is used to generate a locking driving force F5 and drive the bracket (41, 41a) and the locking claw (42, 42a) to move toward the center direction of the cover body 20, so that the bracket (41, 41a) and the locking claw (42, 42a) can better achieve the first heavy locking under the joint drive of the first unlocking block 31 and the bracket spring 43. However, when the first heavy locking is released, the locking driving force F5 generated by the bracket spring 43 can generate a resistance of the locking driving force F5 to the first unlocking block 31 through the bracket (41, 41a) to hinder the first unlocking block 31 from moving backward, so that the first driving spring 32 is used to provide a first positive driving force F1 to overcome the resistance of the second reverse driving force F2 and the resistance of the locking driving force F5, thereby providing a driving force to move along the unlocking direction to the bracket (41, 41a), thereby releasing the first heavy locking.

[0036] The second implementation method, such as Fig.10 As shown, the bracket spring 43 is arranged between the cover body 20 and the bracket (41, 41a), and the bracket spring 43 is used to generate an unlocking driving force F6 and drive the bracket (41, 41a) and the locking claw (42, 42a) to move toward the outer edge of the cover body 20, so that when the unlocking mechanism releases the first lock, the bracket spring 43 can assist the unlocking mechanism to drive the bracket (41, 41a) and the locking claw (42, 42a) to move toward the outer edge of the cover body 20 to release the first lock; and in the open cover state, the bracket spring 43 is conducive to keeping the bracket (41, 41a) and the locking claw (42, 42a) in the unlocked state. On the contrary, when the button counter spring 64 is to drive the first unlocking block 31 to move forward and realize the first re-locking, the button counter spring 64 is used to provide a counter thrust F4 and then superimpose the second reverse thrust F2 to overcome the resistance of the first forward thrust F1 and the resistance of the unlocking driving force F6, thereby driving the first unlocking block 31 to move forward and then drive the bracket (41, 41a) and the locking claw (42, 42a) to move toward the center direction of the cover body 20 to realize the first re-locking.

[0037] In order to further improve the safety of the cooking appliance and reduce the possibility that the pot cover 2 is mistakenly opened when the inner pot 12 has high pressure or high temperature and thus causes harm to the user, a locking mechanism 8 that can respond to the air pressure or temperature in the inner pot 12 is also provided on the pot cover 2, and the locking mechanism 8 includes a locking column 81, and the second unlocking block 21 is provided with a locking portion 213 that can cooperate with the locking column. The locking column 81 is used to move to the moving path of the second unlocking block 21 and cooperate with the locking portion 213 when the air pressure or temperature in the inner pot 12 is higher than a threshold value, so that the second unlocking block 21 cannot move on the pot cover 2 to achieve self-locking and keep the first and second locking in a locked state. According to the above technical solution, when the inner pot 12 is under high pressure or high temperature, the locking column 81 limits the movement of the second unlocking block 21, and the second unlocking block 21 limits the movement of the first unlocking block 31 through the buffer structure. At the same time, the second combining arm 215 on the second unlocking block 21 limits the swing of the locking hook 6, so that the pot cover 2 cannot be opened; only when the pressure and temperature of the inner pot 12 are reduced to below the threshold, the pot cover 2 can be opened, which greatly improves the safety of the cooking utensil.

Claims

1. A cooking utensil with an unlocking mechanism, comprising a base, a pot cover, and an inner pot arranged in the base, wherein the inner pot has a rigid pot edge protruding outward, the pot cover is hinged on the base and can be opened and closed, and the pot cover comprises a cover body and a rigid member installed under the cover body; a locking mechanism is arranged on the cover body, and the locking mechanism comprises a bracket and a locking claw, the bracket is movably arranged on the cover body, the locking claw is installed on the bracket and can move with the bracket, and the locking claw is used to lock the rigid member and the rigid pot edge of the inner pot when the bracket and the locking claw have completed moving toward the center direction of the cover body, thereby realizing a first locking; characterized in that It also includes an unlocking mechanism, which is used to apply a driving force to the bracket that can drive the bracket to move along the unlocking direction; the unlocking mechanism includes a first unlocking block and a second unlocking block that are movably arranged on the cover body, a buffer structure is arranged between the first unlocking block and the second unlocking block, the buffer structure includes a buffer groove and a transmission column that can extend into the buffer groove, the buffer groove is extended and arranged in the front-to-back direction, the buffer groove and the transmission column are arranged on the first unlocking block or the second unlocking block, and the first unlocking block and the second unlocking block are connected by the buffer structure; a first driving spring is arranged between the first unlocking block and the cover body, and a second driving spring is arranged between the second unlocking block and the cover body, the first driving spring is used to provide a first positive driving force F1 in the backward direction to the first unlocking block, the second driving spring is used to provide a second reverse driving force F2 in the forward direction to the second unlocking block, and the first driving spring is used to provide a first positive driving force F1 that can overcome the resistance of the second reverse driving force F2 to provide the bracket with a driving force to move in the unlocking direction to release the first heavy locking.

2. The cooking appliance with an unlocking mechanism according to claim 1, characterized in that: A first combining arm portion is arranged on the first unlocking block, and a second combining arm portion is arranged on the second unlocking block, and the second combining arm portion and the first combining arm portion are arranged one after the other and have an interval space; it also includes a lock hook rotatably arranged on the base, the lock hook includes a top end, a rotating shaft end and a waist portion located between the top end and the rotating shaft end, the top end swings based on the rotating shaft end, the top end of the lock hook has a hook-shaped hook arm and the hook arm extends forward; a button is also arranged on the base, the button is located in front of the lock hook and a button push rod extending backward is arranged on the button, the button push rod is used to transmit a button thrust F3 in the backward direction to the lock hook, and a button counter spring is also arranged between the waist of the lock hook and the base, the button counter spring is used to The hook provides a counter thrust F4 in the forward direction; when the pot lid is closed on the base, the hook arm is inserted into the interval space, at which time the hook arm presses the first combined arm portion to provide the counter thrust F4 of the button counter spring to the first combined arm portion, and the button counter spring is used to provide the counter thrust F4 and then superimpose the second reverse thrust F2, overcoming the resistance of the first positive thrust F1, thereby driving the first unlocking block to move forward and then driving the bracket and the locking claw to move toward the center direction of the cover body to achieve the first heavy locking; conversely, when the button is pressed and the lock hook is deflected toward the rear through the button push rod, the hook arm no longer presses the first combined arm portion but presses the second combined portion, allowing the unlocking mechanism to release the first heavy locking of the locking mechanism.

3. The cooking appliance with an unlocking mechanism according to claim 2, characterized in that: A bending portion is provided on the cover body, and the bending portion is used to combine with the hook arm to realize the second locking between the pot cover and the base; the bending portion is arranged below the first combining arm portion, and when the pot cover is closed on the base, the bending portion slides along the inclined surface of the hook arm and first pushes the hook arm to swing backward, and when the pot cover is completely closed, the hook arm extends into the bending portion, not only pushing the first combining arm portion but also hooking the bending portion so that the completion time of the first locking is at least not earlier than the completion time of the second locking; on the contrary, when the button is pressed and the lock hook is pushed to deflect backward by the button push rod, the hook arm first no longer presses the first combining arm portion but presses the second combining arm portion, so that the unlocking mechanism first releases the first locking of the locking mechanism, and then the hook arm can be separated from the bending portion to release the second locking after it swings backward at a sufficient angle.

4. The cooking appliance with an unlocking mechanism according to claim 1, 2 or 3, characterized in that: The locking mechanism also includes a bracket spring, which is arranged between the cover body and the bracket. The bracket spring is used to generate a locking driving force F5 and drive the bracket and the locking claw to move toward the center direction of the cover body; the first driving spring is used to provide a first positive driving force F1 that can overcome the resistance of the second reverse driving force F2 and the resistance of the locking driving force F5, thereby providing a driving force to the bracket to move along the unlocking direction, thereby releasing the first heavy lock.

5. The cooking appliance with an unlocking mechanism according to claim 2 or 3, characterized in that: The locking mechanism also includes a bracket spring, which is arranged between the cover body and the bracket, and is used to generate an unlocking driving force F6 and drive the bracket and the locking claw to move toward the outer edge of the cover body; the button counter-spring is used to provide a counter-thrust force F4 and then superimpose the second reverse thrust force F2, overcoming the resistance of the first forward thrust F1 and the unlocking driving force F6, thereby driving the first unlocking block to move forward and then drive the bracket and the locking claw to move toward the center of the cover body to achieve the first heavy locking.

6. The cooking appliance with an unlocking mechanism according to claim 1, 2 or 3, characterized in that: The second unlocking block is arranged above the first unlocking block. The second unlocking block is bow-shaped and includes two left and right end walls. The second driving springs are respectively arranged between the left and right end walls and the pot cover. The first unlocking block is arranged below the middle part of the second unlocking block.

7. The cooking appliance with an unlocking mechanism according to claim 1, 2 or 3, characterized in that: It also includes a rotating bracket rotatably arranged on the cover body, wherein the rotating bracket is arranged between the unlocking mechanism and the locking mechanism to transmit the unlocking torque of the unlocking mechanism to the locking mechanism.

8. The cooking appliance with an unlocking mechanism according to claim 7, characterized in that: The pot cover is also provided with a locking mechanism that can respond to the air pressure or temperature in the inner pot, and the locking mechanism includes a locking column. The second unlocking block is provided with a locking part that can cooperate with the locking column. When the air pressure or temperature in the inner pot is higher than a threshold, the locking column is used to move to the moving path of the second unlocking block and cooperate with the locking part so that the second unlocking block cannot move on the pot cover, and the pot cover is self-locking.

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