CN108201340B

CN108201340B - Lid opening and closing mechanism and cooking utensil

Info

Publication number: CN108201340B
Application number: CN201611186653.9A
Authority: CN
Inventors: 许颖华; 李邦帅; 肖兵锋; 龚月望
Original assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Priority date: 2016-12-20
Filing date: 2016-12-20
Publication date: 2020-09-15
Anticipated expiration: 2036-12-20
Also published as: CN108201340A

Abstract

The invention relates to the field of household appliances, and discloses a cover opening and closing mechanism and a cooking utensil. The cover opening and closing mechanism comprises a pot body, a motor arranged on the pot body, a cover body pivoted on the pot body, a locking ring pivoted on the cover body, a first transmission unit arranged on the cover body and a second transmission unit arranged on the pot body. The cover body is parallel to the cover body relative to the rotating axis of the pot body, and the motor drives the second transmission unit to move so as to drive the cover body to rotate between an opening position and a buckling position relative to the pot body. When the motor drives the first transmission unit, power is not transmitted to the second transmission unit, and when the motor drives the second transmission unit, power is not transmitted to the first transmission unit. The cover opening and closing mechanism greatly improves the use comfort of the cooking utensil.

Description

Lid opening and closing mechanism and cooking utensil

Technical Field

The invention relates to the field of household appliances, in particular to a cover opening and closing mechanism and a cooking utensil.

Background

Cooking utensils have been widely used in people's daily lives, such as in electric rice cookers. With the development of the field of electric cooker manufacturing, people have higher and higher requirements on the use comfort of the electric cooker. For example, in the process of opening or closing the cover of the electric cooker, people hope that the process of opening or closing the cover of the electric cooker can be automated, so that the phenomenon of scalding due to direct contact of steam in the process of opening or closing the cover can be effectively avoided on the one hand, and the operation steps of the electric cooker can be reduced on the other hand, so that the use of a user is more concise and convenient.

At present, in the existing electric pressure cooker capable of automatically opening and closing the cover, the cover opening process is that a rotating hand on the cover is firstly rotated, the cover is rotated while a lock catch is driven to rotate by a transmission part, then a cover opening button is manually pressed, a cover is bounced by a spring at a hinge part, the cover opening process of the electric pressure cooker is finally realized, and the cover closing process is just opposite. This current electric pressure cooker does not realize uncapping or the full automation that closes the lid, needs manual rotatory lid with rotatory hasp, continues to press the button of uncapping and just can uncap, and the use is complicated for the user forgets operating procedure more easily, and the reliability is also relatively poor simultaneously.

Aiming at the defects of the prior art, the skilled person in the art needs to find a cover opening and closing mechanism capable of automatically opening and closing a cover, so that the cooking utensil applying the structure can be automatically opened or closed, thereby simplifying the operation steps of the cooking utensil and improving the use comfort of a user.

Disclosure of Invention

The invention aims to provide a cover opening and closing mechanism and a cooking utensil, wherein the cover opening and closing mechanism can enable a cover body to be automatically opened or closed, so that the use comfort of the cooking utensil is improved.

In order to achieve the above object, the present invention provides a cover opening and closing mechanism, which comprises a pot body, a motor mounted on the pot body, a cover body pivoted on the pot body, a locking ring pivoted on the cover body, a first transmission unit mounted on the cover body, and a second transmission unit mounted on the pot body. The cover body is parallel to the cover body relative to the rotating axis of the pot body, and the motor drives the second transmission unit to move so as to drive the cover body to rotate between an opening position and a buckling position relative to the pot body. When the motor drives the first transmission unit, power is not transmitted to the second transmission unit, and when the motor drives the second transmission unit, power is not transmitted to the first transmission unit.

Preferably, a first power output part and a second power output part are synchronously coupled to a power output shaft of the motor, the first power output part is matched with the first transmission unit to transmit the driving force of the motor to the lock ring, and the second power output part is matched with the second transmission unit to transmit the driving force of the motor to the cover body. When the first power output part is linked with the first transmission unit, the second power output part is separated from the second transmission unit, and when the first power output part is separated from the first transmission unit, the second power output part is linked with the second transmission unit.

Preferably, the first power output is a first gear and the second power output is a second gear having a first circumferential tooth section.

Preferably, the first transmission unit includes a third gear rotatably provided on the cover body and having a rotation axis perpendicular to the cover body, and a power steering member drivingly connected between the first gear and the third gear, the third gear being provided coaxially with the lock ring. Wherein the power steering member engages the first gear when the locking collar is rotated between a locked position and an unlocked position relative to the pan body; when the cover body rotates between an opening position and a buckling position relative to the pot body, the power steering piece is separated from the first gear.

Preferably, the first gear and the third gear are spur gears, and the power steering member is a bar slidably disposed on the cover, wherein straight gear sections engaged with the first gear and the third gear are formed at both ends of the bar.

Preferably, the cover body is provided with a sliding groove used for limiting the long rod, and the long rod is provided with a sliding rail matched with the sliding groove.

Preferably, the second transmission unit comprises a pin shaft which is rotatably arranged on the pot body, and the pin shaft is fixedly connected with the cover body. The cover body is provided with a first gear, a second gear and a pin shaft, wherein the pin shaft is provided with a second circumferential tooth section which can be meshed with the first circumferential tooth section of the second gear; when the locking ring rotates between a locking position and an unlocking position relative to the pot body, the first circumferential tooth section is separated from the second circumferential tooth section.

Preferably, the second circumferential tooth section is formed directly on the outer circumferential surface of the pin shaft.

Preferably, a first circumferential flanging section is arranged on the outer edge of the locking ring, and the locking ring can rotate to enable the first flanging section to be in contact with a second circumferential flanging section on the pot body to be locked or separated to be unlocked.

The invention also provides a cooking utensil which comprises the cover opening and closing mechanism.

Preferably, the cooking utensil further comprises a safety button for preventing the cover body from being opened in the working process of the cooking utensil, an electromagnetic push rod matched with the safety button is further arranged on the cover body or the pot body, when the cover body is locked relative to the pot body, the power steering piece triggers the electromagnetic push rod to enable the safety button to lock the cover body and the pot body, and after the cover body is unlocked relative to the pot body, the cover body is far away from the safety button to open the cover body.

Preferably, the cooking appliance further comprises a detection device connected to the motor and adapted to lock the motor in the event of a failure of the motor.

Preferably, the cooking appliance is a pressure cooker.

Through the technical scheme, when the cover opening and closing mechanism works, if the cover body needs to be opened in a locking state, the first transmission unit is driven to move by the rotation of the motor, the cover body is unlocked by the first transmission unit, and after the cover body is unlocked, the motor stops driving the first transmission unit and starts driving the second transmission unit to move, and the cover body is opened by the second transmission unit; if the cover body needs to be locked in the opening state, the motor rotates reversely and drives the second transmission unit to move at first, at the moment, the second transmission unit drives the cover body to be closed, after the cover body is closed, the motor stops driving the second transmission unit to start driving the first transmission unit to move, and at the moment, the first transmission unit drives the cover body to be locked. Thus, the first transmission unit realizes unlocking or locking of the cover body, and the second transmission unit realizes opening or closing of the cover body. Therefore, the cover opening and closing structure can realize the automation of unlocking or locking, opening or closing the cover body, thereby simplifying the operation steps of manually operating the cover body and being beneficial to improving the use comfort of users. The cover opening and closing mechanism can complete the buckling of the pot cover and the screwing and closing action of the locking ring only by one motor, simplifies the cost, can control the motor by a smart phone or other terminals, realizes remote operation, avoids the steam from scalding hands when the cover is opened, and improves the safety of cooking utensils.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of a lid opening and closing mechanism according to the present invention in a closed and locked state;

fig. 2 is a schematic structural view of the cover opening and closing mechanism according to the present invention in a closed and unlocked state;

fig. 3 is a schematic structural view of the cover opening and closing mechanism according to the present invention in an open state;

FIG. 4 is a schematic view of a partial structure of the cover opening and closing mechanism according to the present invention;

FIG. 5 is a schematic structural view of the lid opening and closing mechanism according to the present invention in a closed state;

FIG. 6 is a schematic structural view of the lid opening and closing mechanism according to the present invention in a closed and unlocked state;

fig. 7 is a schematic structural view of the cover opening and closing mechanism according to the present invention in a closed and locked state.

Description of the reference numerals

1 pot body 21 cover body

22 lock ring 31 motor

41 first transmission unit 42 second transmission unit

32 power take-off shaft 33 first gear

34 first circumferential tooth segment of second gear A

411 third gear 412 power steering member

421 straight tooth section of pin shaft C

B second circumferential tooth segment

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

Fig. 1 to 7 show the structure of a cover opening and closing mechanism provided according to the present invention. Referring to fig. 1, 2 and 4, the cover opening and closing mechanism includes a pot 1, a motor 31 mounted on the pot 1, a cover 21 pivoted on the pot 1, a locking ring 22 pivoted on the cover 21 (as shown in fig. 4), a first transmission unit 41 mounted on the cover 21, and a second transmission unit 42 mounted on the pot 1. The locking ring 22 is perpendicular to the cover 21 relative to the rotation axis of the cover 21, the motor 31 drives the first transmission unit 41 to move so as to drive the locking ring 22 to rotate between the locking position and the unlocking position relative to the pot body 1, the rotation axis of the cover 21 relative to the pot body 1 is parallel to the cover 21, the motor 31 drives the second transmission unit 42 to move so as to drive the cover 21 to rotate between the opening position and the buckling position relative to the pot body 1, wherein the motor 31 does not transmit power to the second transmission unit 42 when driving the first transmission unit 41, and the motor 31 does not transmit power to the first transmission unit 41 when driving the second transmission unit 42.

According to the present invention, when the cover opening and closing mechanism of the present invention works, if the cover 21 needs to be opened in a locked state, as shown in fig. 1 to 4, the rotation of the motor 31 first drives the first transmission unit 41 to move, at this time, the first transmission unit 41 drives the lock ring 22 to rotate for unlocking, after the cover 21 is unlocked, the motor 31 stops driving the first transmission unit 41 to start driving the second transmission unit 42 to move, at this time, the second transmission unit drives the cover 21 to open; if the cover 21 needs to be locked in the open state, as shown in fig. 5 to 7, the motor 31 rotates in the reverse direction and first drives the second transmission unit 42 to move, at this time, the second transmission unit 42 drives the cover 21 to close, after the cover 21 is closed, the motor 31 stops driving the second transmission unit 42 to start driving the first transmission unit 41 to move, and at this time, the first transmission unit drives the locking ring 22 to rotate for locking. Thereby, the first transmission unit 41 realizes unlocking or locking of the cover 21, and the second transmission unit 42 realizes opening or closing of the cover 21. Therefore, the cover opening and closing structure of the present invention can realize the automation of unlocking or locking, opening or closing the cover body 21, thereby simplifying the operation steps of manually operating the cover body 21 and facilitating the improvement of the use comfort of the user. In addition, the cover opening and closing mechanism of the invention can complete the buckling of the cover body 21 and the screwing and closing action of the locking ring 22 only by one motor 31, thus simplifying the cost, and can control the motor 31 by a smart phone or other terminals, realizing remote operation, avoiding scalding hands by steam when opening the cover and improving the use safety of the cover opening and closing mechanism.

As shown in fig. 4, in a preferred embodiment, a first power output portion and a second power output portion are synchronously coupled to the power output shaft 32 of the motor 31, the first power output portion is engaged with the first transmission unit 41 to transmit the driving force of the motor 31 to the lock ring 22, and the second power output portion is engaged with the second transmission unit 42 to transmit the driving force of the motor 31 to the cover 21. When the first power output part is linked with the first transmission unit 41, the second power output part is separated from the second transmission unit 42, and when the first power output part is separated from the first transmission unit 41, the second power output part is linked with the second transmission unit 42. Through the arrangement, the motor 31 can only transmit power to the first transmission unit 41 in the unlocking and locking processes of the cover body 21, and only transmit power to the second transmission unit 41 in the opening and closing processes of the cover body 21, and the transmission of the powers is realized through the same power output shaft 32 of the motor 31, so that the structure of the transmission device is greatly simplified, and the structure of the transmission device is more reasonable and compact.

Specifically, as shown in fig. 4, the first power output is a first gear 33 and the second power output is a second gear 34 having a first circumferential tooth space a. When the motor 31 rotates, the first gear 33 and the second gear 34 are driven to rotate simultaneously, and after the rotation of the first gear 33 completes the transmission of power to the first transmission unit 41, the second gear 34 starts to provide power to the second transmission unit 42. Since the second gear 34 has the first circumferential tooth section a, that is, a section on the outer circumferential surface of the second gear 34 is provided with teeth, the first gear 33 starts to mesh with the second transmission unit 42, that is, starts to transmit power to the second transmission unit 42, after power supply to the first transmission unit 41 is completed, and the power supplied from the motor 31 is transmitted to the first transmission unit 41 only by the rotation of the first gear when the first circumferential tooth section a is not meshed with the second transmission unit 42.

According to the present invention, as shown in fig. 1 and 4, the first transmission unit 41 includes a third gear 411 rotatably provided on the cover body 21 and having a rotation axis perpendicular to the cover body 21, and a power steering member 412 drivingly connected between the first gear 33 and the third gear 411, the third gear 411 being provided coaxially with the lock ring 22. Wherein the power steering element 412 meshes with said first gear 33 when the locking collar 22 rotates between the locking position and the unlocking position with respect to the pan body 1; when the cover 21 rotates between the open position and the closed position with respect to the pot 1, the power steering member 412 disengages from the first gear 33. With this arrangement, when the power steering member 412 is engaged with the first gear 33, the power steering member 412 drives the third gear 411 to rotate, and at this time, the third gear 411 can drive the lock ring 22 inside the cover 21 to move to unlock or lock the cover 21, and when the power steering member 412 is disengaged from the first gear 33, the second gear 34 starts to provide power to the second transmission unit 42 to open or close the cover 21.

In a preferred embodiment, the first gear 33 and the third gear 411 are spur gears, and the power steering member 412 is a long bar slidably disposed on the cover body 21. Wherein, both ends of the long bar are formed with straight tooth sections C respectively engaged with the first gear 33 and the third gear 411. Both ends of the bar are formed with straight tooth sections C for engagement with the first gear 33 and the third gear 411, which can define the engagement length of the bar, i.e. when the straight tooth section C of the bar is in the defined engagement length, the straight tooth section C simultaneously keeps engagement with the first gear 33 and the third gear 411, and when the straight tooth section C of the bar is out of the defined engagement length, the straight tooth section C simultaneously disengages from the first gear 33 and the third gear 411, thereby disabling the first driving means 41 and enabling the second driving means 42. Of course, the straight-tooth section C may also be non-linear, for example, it may be a curved line with a certain curvature, as long as it can be ensured that it can simultaneously cooperate with the first gear 33 and the third gear 411 and perform the corresponding functions.

In another preferred embodiment, the first gear 33 and the third gear 411 may also be helical gears, and the power steering member 412 may also be a long bar slidably disposed on the cover body 21. Wherein, the two ends of the long bar are formed with helical tooth sections respectively engaged with the first gear 33 and the third gear 411. Through using the helical gear, the transmission of messenger's power is more steady, and the noise is lower, can bear great axial load simultaneously, has prolonged transmission's life.

Further preferably, the cover body 21 is provided with a sliding groove for limiting the long rod, and the long rod is provided with a sliding rail matched with the sliding groove. Of course, the cover body 21 may also be provided with a slide rail for limiting the long rod, and the long rod is formed with a slide groove matched with the slide rail. The long rod and the cover body 21 can be fixed in a sliding mode through the matching of the sliding grooves and the sliding rails.

In the embodiment shown in fig. 4, the locking ring 22 is arranged coaxially with the third gear 411 on the surface of the cover 21 facing away from the third gear 411. The locking ring 22 rotates along with the rotation of the third gear 411, and the locking ring 22 cooperates with the fastener in the pot body 1 to lock or unlock the cover 21 and the pot body 1. In particular, a first circumferential flanging section can be provided on the outer edge of the locking collar 22, the rotation of the locking collar 22 enabling the first flanging section to be used in contact with a second circumferential flanging section on the pan 1 for locking or disengaging for unlocking. Preferably, the first circumferential flanging section is located below the second circumferential flanging section, so that the locking ring 22 is locked with respect to the pan 1 when the first circumferential flanging is opposite to the second flanging and the locking ring 22 is unlocked with respect to the pan 1 when the first circumferential flanging is separated from the second flanging. Further preferably, in order to enable the locking collar 22 to be stably locked with the pan body 1, the length of the second circumferential flange extending in the circumferential direction of the inner edge of the pan body 1 may be set to be greater than the length of the first circumferential flange extending in the circumferential direction of the outer edge of the locking collar 22.

According to the present invention, as shown in fig. 1 and 4, the second transmission unit 42 includes a pin 421 rotatably disposed on the pan body 1, and the pin 421 is fixedly connected to the cover 21. Wherein, the pin 421 is provided with a second circumferential tooth section B capable of meshing with the first circumferential tooth section a of the second gear 34; when the cover body 21 rotates between the opening position and the buckling position relative to the pot body 1, the first circumferential tooth section A is meshed with the second circumferential tooth section B; when the locking ring 22 rotates between the locking position and the unlocking position relative to the pot 1, the first circumferential tooth section a is disengaged from the second circumferential tooth section B. Preferably, the second circumferential tooth section B may be formed on a separate gear fixed to the pin 421, or may be directly formed on the outer circumferential surface of the pin 421.

In addition, the invention also provides a cooking utensil which comprises the cover opening and closing mechanism.

According to the cooking utensil of the invention, when the cooking utensil works, if the cover body 21 needs to be automatically unlocked and opened in a locked state, as shown in fig. 2, a button for controlling the rotation of the motor 31 is started, at the moment, the motor 31 rotates in a clockwise direction (when viewed from the top in a plan view 2) and drives the first gear 33 to rotate clockwise, the first gear 33 drives the power steering member 412 to move rightwards, the power steering member 412 drives the third gear 411 to rotate clockwise in the process of moving rightwards, at the moment, the third gear 411 drives the lock ring 22 in the cover body 21 to rotate, when the first circumferential flanging section of the lock ring 22 is separated from the second flanging section in the pot body, the power steering member 412 is separated from the first gear 33, and at the moment, the cover body 21 is unlocked relative to the pot body 1; the motor 31 continues to rotate clockwise, and after the power steering member 412 disengages from the first gear 33, the second gear 34 engages with the second circumferential tooth segment B on the pin 421 fixed on the pot body 1, so as to drive the pin 421 to rotate counterclockwise to drive the cover body 21 to open relative to the pot body 1.

Similarly, if it is necessary to automatically close and lock the cover 21 in the open state, as shown in fig. 5, the motor 31 is controlled to rotate counterclockwise, at this time, the second gear 34 rotates to drive the second circumferential tooth segment B on the pin 421 to rotate clockwise to drive the cover 21 to close with respect to the pot body 1, after the cover 21 is closed, the power steering member 412 is re-engaged with the first gear 33, and under the driving of the counterclockwise rotation of the motor 31, the power steering member 412 moves leftward to drive the third gear 411 to rotate counterclockwise, and the third gear drives the lock ring 22 located inside the cover 21 to rotate, and when the first circumferential flanging segment of the lock ring 22 is opposite to or attached to the second flanging segment inside the pot body, the cover 21 is locked with respect to the pot body 1.

In a preferred embodiment, detection means (not shown in the figures) are provided in the cooking utensil for detecting an operating anomaly of the motor 31. For example, in the process of cooking utensil operation, lid 21 is locked for pot body 1 under normal conditions, the motor does not rotate at this moment, if motor 31 rotates because of breaking down at this moment, then drive power steering 412 motion, power steering 412 drives the rotation of third gear 411 and leads to lid 21 to unblock for pot body 1, and at this moment because cooking utensil is in operation, if lid 21 unlocks suddenly and opens, the inside high pressure of cooking utensil will make food blowout and scald the user, in order to further improve the safety in utilization of cooking utensil, can set up extra detection device in cooking utensil, if detection device detects motor 31 unusual in cooking utensil during operation, then avoid dangerous emergence through locking motor 31. For example, before the cooking utensil is started to work, after the cover body 21 is covered on the pot body 1, the detection device detects that the motor 31 cannot continuously lock the cover body 21 and the pot body 1 due to failure, and at this time, the detection device controls the cooking utensil not to start the cooking work.

In another preferred embodiment, the cooking utensil further comprises a safety button for preventing the cover 21 from being opened during the operation of the cooking utensil, an electromagnetic push rod matched with the safety button is further arranged on the cover 21 or the pot body 1, the power steering component 412 triggers the electromagnetic push rod to enable the safety button to lock the cover 21 and the pot body 1 after the cover 21 is locked relative to the pot body 1, and is far away from the safety button to open the cover 21 after the cover 21 is unlocked relative to the pot body 1. The safety button is used for further locking the cover body 21 and the pot body 1 in the working process of the cooking utensil so as to provide double locking protection for the cooking utensil, thereby preventing the cover body 21 from being suddenly unlocked and opened in the cooking process of the cooking utensil due to the failure of the motor 31; meanwhile, the electromagnetic push rod is far away from the safety button after the cover body 21 is unlocked relative to the pot body 1 so as to open the cover body 21.

The cover opening and closing structure can realize the automation of the unlocking or locking, opening or closing process of the cover body 21, thereby simplifying the operation steps of manually operating the cover body 21 of the cooking utensil and being beneficial to improving the use comfort of users.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims

1. A cover opening and closing mechanism is characterized by comprising a pot body (1), a motor (31) arranged on the pot body (1), a cover body (21) pivoted on the pot body (1), a locking ring (22) pivoted on the cover body (21), a first transmission unit (41) arranged on the cover body (21) and a second transmission unit (42) arranged on the pot body,

the locking ring (22) is vertical to the cover body (21) relative to the rotating axis of the cover body (21), the motor (31) drives the first transmission unit (41) to move so as to drive the locking ring (22) to rotate between a locking position and an unlocking position relative to the pot body (1),

the rotating axis of the cover body (21) relative to the pot body (1) is parallel to the cover body (21), the motor (31) drives the second transmission unit (42) to move so as to drive the cover body (21) to rotate between an opening position and a buckling position relative to the pot body (1),

wherein power is not transmitted to the second transmission unit (42) when the motor (31) drives the first transmission unit (41), and power is not transmitted to the first transmission unit (41) when the motor (31) drives the second transmission unit (42),

the first transmission unit (41) comprises a third gear (411) which is rotatably arranged on the cover body (21) and has a rotation axis perpendicular to the cover body (21), and a power steering member (412) which is in transmission connection between a first power output part arranged on a power output shaft (32) of the motor (31) and the third gear (411), the third gear (411) is arranged coaxially with the lock ring (22), wherein,

when the locking ring (22) rotates between a locking position and an unlocking position relative to the pot body (1), the power steering piece (412) is meshed with the first gear (33);

when the cover body (21) rotates between an opening position and a buckling position relative to the pot body (1), the power steering piece (412) is separated from the first gear (33).

2. The cover opening and closing mechanism according to claim 1, wherein the first power output portion and the second power output portion are synchronously coupled to the power output shaft (32) of the motor (31), the first power output portion is engaged with the first transmission unit (41) to transmit the driving force of the motor (31) to the lock ring (22), and the second power output portion is engaged with the second transmission unit (42) to transmit the driving force of the motor (31) to the cover body (21), wherein,

when the first power output part is linked with the first transmission unit (41), the second power output part is separated from the second transmission unit (42), and when the first power output part is separated from the first transmission unit (41), the second power output part is linked with the second transmission unit (42).

3. The cover opening and closing mechanism according to claim 2, wherein the first power output is the first gear (33), the second power output is a second gear (34) having a first circumferential tooth section (a), and the power steering member (412) is drivingly connected between the first gear (33) and a third gear (411).

4. The cover opening and closing mechanism according to claim 3, wherein the first gear (33) and the third gear (411) are spur gears, and the power steering member (412) is a long bar slidably provided on the cover body (21), wherein both ends of the long bar are formed with straight gear sections (C) respectively engaged with the first gear (33) and the third gear (411).

5. The cover opening/closing mechanism according to claim 4, wherein the cover body (21) is provided with a slide groove for limiting the elongated rod, and the elongated rod is provided with a slide rail engaged with the slide groove.

6. The lid opening and closing mechanism according to any of claims 3 to 5, wherein the second transmission unit (42) comprises a pin (421) for rotatably arranging on the pan (1), the pin (421) being fixedly connected with the lid body (21), wherein,

the pin shaft (421) is provided with a second circumferential tooth section (B) which can be meshed with the first circumferential tooth section (A) of the second gear (34),

when the cover body (21) rotates between an opening position and a buckling position relative to the pot body (1), the first circumferential tooth section (A) is meshed with the second circumferential tooth section (B);

when the locking ring (22) rotates between a locking position and an unlocking position relative to the pot body (1), the first circumferential tooth section (A) is separated from the second circumferential tooth section (B).

7. The cover opening and closing mechanism according to claim 6, wherein the second circumferential tooth section (B) is formed directly on the outer circumferential surface of the pin shaft (421).

8. Lid opening and closing mechanism according to claim 1, characterized in that a first circumferential flanging section is provided on the outer edge of the locking collar (22), the locking collar (22) being rotatable so that the first circumferential flanging section is intended to be in contact with a second circumferential flanging section on the pan (1) for locking or disengaging for unlocking.

9. A cooking utensil comprising a lid opening and closing mechanism according to any one of claims 1 to 8.

10. The cooking utensil according to claim 9 further comprising a safety button for preventing the lid (21) from opening during operation of the cooking utensil, wherein the lid (21) or the pot (1) is further provided with an electromagnetic push rod cooperating with the safety button, wherein the power steering member (412) triggers the electromagnetic push rod to lock the lid (21) with the pot (1) when the lid (21) is locked with respect to the pot (1), and wherein the electromagnetic push rod is away from the safety button to open the lid (21) when the lid (21) is unlocked with respect to the pot (1).

11. The cooking appliance according to claim 9, characterized in that it further comprises detection means associated with said motor (31) and intended to lock it in the event of a failure of said motor (31).

12. The cooking utensil of claim 9 wherein the cooking utensil is a pressure cooker.