A clamp type pressure cooker

Abstract

A clamp-type pressure cooker comprises: a pot body; a pot cover; a clamp; a driving device; the driving device comprises: a first rocker; a driving plate; a first elastic member; a locking member rotatably arranged on the pot cover, the locking member being arranged to be rotatable to a first position and a second position, and the locking member is locked and matched with the second end of the first rocker in the state of the first position to restrict the second end of the first rocker from rotating downward, and the locking member is separated from the second end of the first rocker in the state of the second position to achieve unlocking, so that the second end of the first rocker can rotate downward; a second elastic member acting on the locking member so that the locking member always has a tendency to rotate to the first position; and a cover opening button assembly acting on the locking member to drive the locking member to rotate to the second position. Compared with the prior art, the driving structure of the present application is more stable during the process of opening and closing the cover.

Description

Technical Field

[0001] The invention belongs to the technical field of kitchen cooking utensils, and in particular relates to a clamp-type pressure cooker. Background Art

[0002] Currently, the clamp-type pressure cookers on the market mostly include a pot body, a pot lid, a clamp arranged on the pot lid for locking the pot lid and the pot body, and a driving device for driving the clamp to lock or open the pot lid and the pot body. In order to facilitate opening and closing the pot lid, the driving device is mostly implemented by a knob or button or other structure.

[0003] In order to enable the pot lid to be placed upright on the kitchen countertop after being opened and to keep the pot lid and the kitchen countertop clean and tidy, the applicant disclosed a structure of a pressure cooker in the invention patent application "Clamp-type pressure cooker" with application number CN201810551113.9 (application publication number CN108497917A), which includes a pot body, a pot lid, a clamp provided on the pot lid for locking the pot lid and the pot body, and a driving device for driving the clamp to lock or open the pot lid and the pot body, the driving device including a driving member, which is rotatably connected to the pot lid and drivingly connected to the above-mentioned clamp, and the outer end portion of the driving member is a structure that can place the pot lid upright on a plane, when the outer end portion of the driving member is pressed, the driving member drives the clamp to clamp the pot lid and the pot body; when the outer end portion of the driving member is tilted, the driving member drives the clamp to open the pot lid and the pot body, and the pot lid can be placed upright on a plane under the support of the outer end portion of the driving member. In order to realize the upward tilting of the outer end of the driving member, a cover opening button is provided above the inner end of the driving member. When the cover opening button is pressed, the inner end of the driving member is pressed accordingly, and the outer end of the driving member tilts upward under the action of the rotating shaft; when the outer end of the driving member is pressed, the inner end of the driving member tilts upward and presses against the cover opening button. That is, the application directly acts on both ends of the driving member to open and close the pressure cooker.

[0004] Another example is the structure disclosed in the utility model patent "A Clamp-type Pressure Cooker" (authorization announcement number CN211270010U) with patent number ZL201922081952.1, which includes a pot body, a pot cover, a clamp and a driving device, wherein the driving device includes: a handle with a first end rotatably connected to the pot cover; a driving plate that can be laterally moved on the pot cover and is transmission-connected to the clamp and the first end of the handle; a first elastic member acting on the handle or the driving plate; a lock hook rotatably connected to the second end of the handle, and a lock seat for the lock hook to buckle in is correspondingly provided on the pot cover; a button provided on the second end of the handle and transmission-connected to the lock hook; and a second elastic member acting on the button. This patent is convenient for opening the lid and has a more stable structure. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a clamp-type pressure cooker with a more stable driving structure and a more sensitive response during the opening and closing of the lid in view of the current status of the prior art.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a clamp-type pressure cooker, comprising:

[0007] Pot body;

[0008] A pot lid that can be closed on the pot;

[0009] At least two clamps are arranged on the pot cover along the circumference, and are used to lock the pot cover and the pot body;

[0010] A driving device is connected to each clamp in a transmission manner and is used to drive each clamp to move and open and close;

[0011] The drive device comprises:

[0012] A first rocker, wherein the middle portion is rotatably connected to the pot cover, and the first end portion and the second end portion of the first rocker are free ends that can rotate up and down relative to the pot cover;

[0013] a driving plate, which is laterally movable and arranged on the pot cover, and is connected to the clamp, and the driving plate is arranged to be in transmission connection with the first rocker and can move laterally to open the clamp during the downward rotation of the second end of the first rocker, and move in the opposite direction to close the clamp during the upward rotation of the second end of the first rocker;

[0014] a first elastic member, acting on the driving plate or the first rocking arm, so that the second end of the first rocking arm always has a tendency to rotate downward;

[0015] It is characterized in that the driving device also includes:

[0016] A locking member is rotatably disposed on the pot cover, the locking member is arranged to be rotatable to a first position and a second position, and the locking member is locked and matched with the second end of the first rocker in the first position to restrict the second end of the first rocker from rotating downward, and the locking member is disengaged from the second end of the first rocker in the second position to achieve unlocking, so that the second end of the first rocker can rotate downward;

[0017] a second elastic member, acting on the locking member to make the locking member always have a tendency to rotate to the first position;

[0018] The cover opening button assembly acts on the locking member to drive the locking member to rotate to the second position.

[0019] Preferably, a slot is provided on the side wall of the second end of the first rocker arm, and at least a portion of the locking member is engaged with the slot when the locking member rotates to the first position, and is disengaged from the slot when the locking member rotates to the second position; after the second end of the first rocker arm rotates downward, the locking member abuts against the side wall of the second end of the first rocker arm and is maintained in the second position, and after the second end of the first rocker arm rotates upward, the locking member rotates toward the first position and is engaged with the slot.

[0020] To further improve the structural stability, preferably, there are at least two groups of the locking member and the second elastic member and they are respectively arranged on both sides of the second end of the first rocker; correspondingly, there are at least two card slots and they are respectively opened on the two side walls of the second end of the first rocker.

[0021] Preferably, the first end of the first rocker is arranged to support the pot cover so that the pot cover stands on a plane after the first rocker is rotated upward.

[0022] In the above schemes, in order to better drive the rotation of the locking member, the lid opening button assembly includes a second rocker and a transmission member, the middle part of the second rocker is rotatably connected to the pot cover, the inner end and the outer end of the second rocker are free ends that can rotate up and down relative to the pot cover, and the inner end of the second rocker is opposite to the second end of the first rocker; the transmission member is connected to the inner end of the second rocker and the locking member to convert the upward rotation force of the inner end of the second rocker into driving the locking member to rotate to the second position. Of course, the lid opening button assembly can also directly use a button, and the rotation of the locking member is driven by the up and down movement of the button.

[0023] Furthermore, the transmission member includes a slider and a connecting rod, the slider is connected to the inner end of the second rocker, and the slider is connected to the pot cover in a manner that it can move up and down; one end of the connecting rod is rotatably connected to the slider, and the other end is rotatably connected to the locking member. In this way, the slider can move up and down with the rotation of the second rocker, and the locking member is driven to rotate through the connecting rod.

[0024] In order to prevent jamming during use and facilitate assembly, the slider is further provided with a first pin shaft, and a round hole for the first pin shaft to pass through is opened in one end of the connecting rod; the other end of the connecting rod is a C-shaped structure with an opening, and the locking piece is provided with a second pin shaft that can be inserted into the opening.

[0025] Furthermore, there are at least two locking members, which are respectively arranged on both sides of the second end of the first rocker; the second pin shaft extends along the length direction of the first rocker and is exposed outside the end surface of the second end of the first rocker; the connecting rod has at least two locking members, which are respectively arranged on the outside of the end surface of the second end of the first rocker corresponding to the respective locking members, at least two connecting rods are located between the above locking members and are distributed in a V shape, each opening is located at the upper part of the connecting rod and is rotatably connected to the respective second pin shaft, and each round hole is located at the lower part of the connecting rod and is arranged adjacent to each other; at least two of the above first pin shafts are arranged on the slider. In this way, at least two locking members can be driven to rotate by a second rocker, and at least two locking members arranged on both sides of the second end of the first rocker cooperate with the first rocker to better lock the first rocker, thereby improving the structural stability.

[0026] In the above solution, the cover opening button assembly further includes a third elastic member, which acts below the outer end of the second rocker to make the outer end of the second rocker always have a tendency to rotate upward. In this way, the outer end of the second rocker can be reset immediately after being pressed.

[0027] Finally, it also includes a main panel, which is installed on the pot cover, the cover opening button assembly, the locking piece, the second elastic piece, and the first rocker are arranged on the main panel, and the driving plate is arranged between the main panel and the pot cover; the sliding block is provided with a vertically extending slide groove, and the main panel has a vertically extending slide bar part that cooperates with the above-mentioned slide groove to be inserted into the slide groove; the main panel is provided with a mounting seat, the locking piece is a locking block, which is rotatably connected to the mounting seat through a rotating shaft, and the second elastic piece is a torsion spring sleeved on the rotating shaft, and the two ends of the torsion spring act on the mounting seat and the locking block respectively.

[0028] Compared with the prior art, the advantages of the present invention are: the driving device in the present invention adds a locking member, a second elastic member and a cover opening button assembly on the basis of the first rocker, the driving plate and the first elastic member. By pressing the cover opening button assembly, the locking member can be unlocked, so that the first rocker can be directly rotated under the action of the first elastic member to make the first end of the first rocker rotate upward, and the rotation of the first rocker can drive the driving plate to move and open the clamp; by rotating the first rocker, the driving plate can move in the opposite direction to close the clamp, and the locking of the first rocker and the locking member can close the clamp accidentally opened. Therefore, the present application can directly drive the first rocker to rotate and drive the clamp to open through the cover opening button assembly; the cooperation of the first rocker and the locking member can realize the closing of the clamp and prevent the clamp from accidentally opening; therefore, the present application can realize a more stable driving structure and a more sensitive cover opening and closing action during the process of opening and closing the cover; at the same time, the present application has a simple structure and is easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1It is a schematic diagram of the structure of the clamp in a closed state according to an embodiment of the present invention;

[0030] Figure 2 is a cross-sectional view of the clamp in a closed state according to an embodiment of the present invention;

[0031] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0032] Figure 4 It is a schematic diagram of the partial structure of the clamp in the closed state in an embodiment of the present invention (the cover plate and the pot body are omitted);

[0033] Figure 5 A partial cross-sectional view of the clamp in a closed state according to an embodiment of the present invention;

[0034] Figure 6 Another partial cross-sectional view of the clamp in a closed state according to an embodiment of the present invention;

[0035] Figure 7 for Figure 4 Enlarged view of middle part B;

[0036] Figure 8 It is a three-dimensional exploded view of an embodiment of the present invention (the pot body is omitted);

[0037] Fig. 9 It is a partial three-dimensional exploded view of an embodiment of the present invention;

[0038] Fig.10 It is a structural schematic diagram of a slider in an embodiment of the present invention;

[0039] Fig.11 This is a schematic diagram of the structure of the main panel in an embodiment of the present invention;

[0040] Fig.12 This is a schematic diagram of the structure of the clamp in an open state according to an embodiment of the present invention;

[0041] Fig.13 This is a schematic diagram of the structure of a pot cover in an upright position according to an embodiment of the present invention;

[0042] Fig.14 A partial cross-sectional view of the clamp in an open state according to an embodiment of the present invention;

[0043] Fig.15 It is a schematic diagram of the partial structure of the embodiment of the present invention when the clamp is in an open state (the pot body and the cover are omitted);

[0044] Fig.16 for Fig.15 Enlarged view of the middle C part;

[0045] Fig.17Another partial cross-sectional view of the clamp in the open state according to the embodiment of the present invention;

[0046] Fig.18 It is another partial cross-sectional view of the clamp in the open state according to the embodiment of the present invention. DETAILED DESCRIPTION

[0047] The present invention is further described in detail below with reference to the accompanying drawings.

[0048] like Figures 1 to 18 As shown, a preferred embodiment of a clamp-type pressure cooker of the present invention is shown, and the clamp-type pressure cooker comprises a pot body 1, a pot cover 2, a clamp 3, a driving device 4, a main panel 5, a pressure limiting valve 6, a float safety valve 7 and a cover plate 8.

[0049] The pot body 1 has handles 11 installed on both sides; the pot cover 2 is closed on the pot body 1, and the pot cover 2 is provided with a float safety valve installation hole 21 and a pressure limiting valve installation hole 22; and a sealing ring is installed between the pot cover 2 and the pot body 1. The main panel 5 is installed on the pot cover 2.

[0050] There are two clamps 3 symmetrically distributed on both sides of the pot cover 2 for locking the pot cover 2 and the pot body 1; when the two clamps 3 are close to each other, the pot cover 2 and the pot body 1 can be locked, and conversely, when they are relatively far away from each other, they are unlocked so that the pot cover 2 can be removed from the pot body 1.

[0051] The driving device 4 is connected to each clamp 3 in a transmission manner, and is used to drive each clamp 3 to move and lock or unlock the pot cover 2 and the pot body 1. The driving device 4 includes a first rocker 41, a driving plate 42, a first elastic member 43, a locking member 44, a second elastic member 45, and a lid opening button assembly. The middle portion of the first rocker 41 is rotatably connected to the main panel 5 via an axis 410, and the first end 411 and the second end 412 thereof are free ends that can rotate up and down relative to the pot cover 2; the first end 411 of the first rocker 41 is arranged to support the pot cover 2 after it rotates upward so that the pot cover 2 is placed upright on a plane, such as Fig.13The first rocker 41 is connected with a tooth plate 415, which is sleeved on the shaft 410 so as to rotate relative to the shaft 410. A plurality of teeth 413 are arranged at the bottom of the tooth plate 415, which are arranged in an outwardly convex arc shape with the shaft 410 as the center. The teeth 413 at the bottom of the tooth plate 415 pass through the main panel 5 and are exposed below the main panel 5, and are connected to the driving plate 42. When the first rocker 41 rotates, the tooth plate 415 is driven to rotate, thereby driving the driving plate 42 to move. There are two driving plates 42, which can be laterally moved between the pot cover 2 and the main panel 5. The two driving plates 42 are rod-shaped and distributed in a "I" shape. The inner ends of each driving plate 42 are opposite to each other, and the outer ends are connected to the corresponding clamps 3; and the driving plate 42 is arranged to be transmission-connected with the first rocker 41 and can be laterally moved to open the clamp 3 during the downward rotation of the second end 412 of the first rocker 41, and can be reversely moved to close the clamp 3 during the upward rotation of the second end 412 of the first rocker 41; in this embodiment, the transmission connection method of the driving plate 42 and the first rocker 41 is as follows:

[0052] like Figure 8As shown, the length direction of the first rocker arm 41 is substantially consistent with the arrangement direction of the drive plates 42, and the first rocker arm 41 is located above one of the drive plates 42. The drive plate 42 is provided with a plurality of tooth grooves 420 arranged along the length direction for the teeth 413 on the bottom of the tooth plate 415 to be inserted into. The teeth 413 at the bottom of the tooth plate 415 are inserted into the tooth grooves 420, so as to drive the above-mentioned drive plate 42 to move by rotating the first rocker arm 41. In order to simultaneously drive the movement of the other driving plate 42, a fixing plate 46 and a transmission disc 47 are also included. The transmission disc 47 and the fixing plate 46 are respectively arranged between the driving plate 42 and the main panel 5 one above and one below. The fixing plate 46 and the pot cover 2 are fixedly connected by welding, bolting, etc. (in order not to affect the movement of the driving plate 42, there is a gap between the fixing plate 46 and the pot cover 2 for the driving plate 42 to move). The above-mentioned main panel 5 is connected to the fixing plate 46, and the center of the fixing plate 46 is connected to a main shaft 465 extending upward. The fixing plate 46 is provided with a strip-shaped guide hole 460 corresponding to the tooth groove 420 on the fixing plate 46. The guide hole 460 extends along the length direction of the driving plate 42. The teeth 413 at the bottom of the tooth plate 415 pass through the guide hole 460 and are stuck in the tooth groove 420, thereby limiting the moving direction of the driving plate 42; the center of the above-mentioned transmission disc 47 is sleeved on the main shaft 465 so that it can move around the main shaft The shaft 465 rotates, and two connecting columns are protruded downward on the bottom surface of the transmission disk 47. The two connecting columns are symmetrically distributed with the central axis of the transmission disk 47 as the symmetry axis, and two waist-shaped holes 461 are provided on the fixed plate 46 for the connecting columns to pass through and move along them. The ends of each driving plate 42 are respectively provided with holes 421 for the corresponding connecting columns to be inserted. In this way, the connecting columns on the transmission disk 47 can pass through the waist-shaped holes 461 and be inserted into the holes 421 of the driving plates 42. The movement of one of the driving plates 42 can drive the transmission disk 47 to rotate, and then drive the other driving plate 42 to move; the above-mentioned first elastic member 43 is a first tension spring, one end of the first tension spring is connected to the transmission disk 47, and the other end is connected to the fixed plate 46, so that the transmission disk 47 always has a tendency to rotate in the clockwise direction. When the transmission disk 47 rotates clockwise, the two driving plates 42 move outward and away from each other, thereby opening the clamp 3. In this way, when the second end of the first rocker arm rotates downward and the first end rotates upward, the first rocker arm can drive the driving plate to move outward to open the clamp. Conversely, when the second end of the first rocker arm rotates upward and the first end rotates downward, the first rocker arm can drive the above-mentioned driving plate to move inward to close the clamp.

[0053] The locking member 44 is rotatably disposed on the pot cover 2, and the locking member 44 is arranged to be rotatable to a first position and a second position, and the locking member 44 is locked and matched with the second end 412 of the first rocker 41 in the first position to restrict the second end 412 of the first rocker 41 from rotating downward (such as Figure 5 , 6, 7), the locking member 44 is disengaged from the second end 412 of the first rocker 41 in the second position to achieve unlocking, so that the second end 412 of the first rocker 41 can rotate downward (as shown in FIG. Fig.16 , 17 , 18); the second elastic member 45 acts on the locking member 44 so that the locking member 44 always has the tendency to rotate to the first position. In this embodiment, a slot 414 is provided on the side wall of the second end 412 of the first rocker 41, and a part of the locking member 44 is inserted into the slot 414 when the locking member 44 rotates to the first position, and is disengaged from the slot 414 when the locking member 44 rotates to the second position; the locking member 44 abuts against the side wall of the second end 412 of the first rocker 41 after the second end 412 of the first rocker 41 rotates downward and is maintained in the second position, and rotates toward the first position and is inserted into the slot 414 after the second end 412 of the first rocker 41 rotates upward.

[0054] In this embodiment, in order to improve the structural stability, the locking member 44 and the second elastic member 45 are provided in two groups and are respectively provided on both sides of the second end 412 of the first rocker 41, and the clamping groove 414 is provided in two groups and is respectively provided on the two side walls of the second end 412 of the first rocker 41. Correspondingly, two mounting seats 51 are provided on the main panel 5, and each locking member 44 is a locking block and is rotatably connected to the corresponding mounting seat 51 through a rotating shaft 441. The second elastic member 45 is a torsion spring sleeved on the rotating shaft 441, and the two ends of the torsion spring act on the mounting seat 51 and the locking member 44 respectively.

[0055] The above-mentioned lid opening button assembly acts on the locking member 44 to drive the locking member 44 to rotate to the second position. The lid opening button assembly includes a second rocker 48, a transmission member 49, and a third elastic member 40. The middle part of the second rocker 48 is rotatably connected to the main panel 5. The inner end and the outer end of the second rocker 48 are free ends that can rotate up and down relative to the pot cover 2, and the inner end of the second rocker 48 is opposite to the second end 412 of the first rocker 41; the transmission member 49 is connected to the inner end of the second rocker 48 and the locking member 44 to convert the upward rotation force of the inner end of the second rocker 48 into a force for driving the locking member 44 to rotate to the second position. The transmission member 49 includes a slider 491 and a connecting rod 492. The slider 491 is connected to the inner end of the second rocker 48, and the slider 491 is connected to the main panel 5 in a manner that it can move up and down. The slider 491 is provided with a vertically extending slide groove 490, and the main panel 5 is provided with a vertically extending slide bar 52 that cooperates with the slide groove 490 and is inserted into the slide groove 490. There are two connecting rods 492, one end of each connecting rod 492 is rotatably connected to the slider 491, and the other end is rotatably connected to the corresponding locking member 44. Specifically, two first pins 493 are convexly provided on the slider 491, and a round hole 494 is provided in one end of each connecting rod 492 for the corresponding first pin 493 to pass through; the other end of each connecting rod 492 is a C-shaped structure with an opening 495, and each locking member 44 is provided with a second pin 442 that can be inserted into the opening 495. The second pin shaft 442 extends along the length direction of the first rocker arm 41 and is exposed outside the end surface of the second end portion 412 of the first rocker arm 41; in this embodiment, there are two connecting rods 492 and they are arranged on the outside of the end surface of the second end portion 412 of the first rocker arm 41 corresponding to their respective locking members 44, the two connecting rods 492 are located between the above-mentioned locking members 44 and are distributed in a V shape, each opening 495 is located at the upper part of the connecting rod 492 and is rotatably connected to its respective second pin shaft 441, and each circular hole 494 is located at the lower part of the connecting rod 492 and is arranged adjacent to each other; the above-mentioned third elastic member 40 is a third spring, which acts below the outer end portion of the second rocker arm 48 so that the outer end portion of the second rocker arm 48 always has a tendency to rotate upward.

[0056] The cover plate 8 is disposed above the main panel, and covers the second end 412 of the first rocker arm 41, the inner end of the second rocker arm 48, and the components therebetween. Only the first end 411 of the first rocker arm 41 and the outer end of the second rocker arm 48 are exposed outside the cover plate 8. The clamp 3 can be opened and the first end 411 of the first rocker arm 41 can be rotated upward by pressing the outer end of the second rocker arm 48, and the clamp 3 can be closed by pressing the first end 411 of the first rocker arm 41 downward. The specific process is as follows: when the pressure cooker needs to be opened, the outer end of the second rocker 48 is pressed downward, and the inner end of the second rocker 48 rotates upward, driving the slider 491 to move upward, thereby driving the connecting rod 492 to rotate, and the connecting rod 492 pushes the locking member 44 to move toward the second position and disengage from the first rocker 41. When the first rocker 41 is free from the restriction of the locking member 44, the first rocker 41 rotates under the action of the first elastic member 43, so that the second end 412 of the first rocker 41 rotates downward until it abuts against the main panel 5, and the first end 411 rotates upward to support the pot cover 2 so that the pot cover 2 is placed upright on a flat surface such as a stove. At the same time, the first rocker 41 The rotation and the action of the first elastic member 43 enable the driving plate 42 to move outward and drive the clamp 3 to move outward, thereby achieving the purpose of removing the pot cover 2 from the pot body 1; when the pressure cooker needs to be closed, the first end 411 of the first rocker arm 41 is pressed downward, and the rotating first rocker arm 41 can drive the driving plate 42 to move inward and close the clamp 3, while the second end 412 of the first rocker arm 41 rotates upward, and the locking member 44 rotates toward the first position under the action of the second elastic member 45 until it is clamped in the clamping groove 414. The cooperation between the locking member 44 and the clamping groove 414 can prevent the first rocker arm 41 from rotating accidentally and keep the clamp 3 in a closed state.

[0057] The float safety valve 7 is installed in the float safety valve installation hole 21. Its structure is the same as that of other pressure cookers and will not be described in detail here. When there is pressure in the pot, the float safety valve 7 is lifted and sealed, so that the pressure of the pressure cooker increases; when the pressure of the pressure cooker drops below the safety pressure, the float safety valve 7 falls. In order to further improve the safety of the pressure cooker in this embodiment, a limit hole 422 for the float safety valve 7 to pass through is opened on the driving plate 42. The driving plate 42 can only move to open the clamp 3 after the float safety valve 7 falls. On the contrary, when the float safety valve 7 is lifted, the driving plate 42 cannot move.

[0058] The pressure limiting valve 6 is installed in the pressure limiting valve installation hole 22. The structure of the pressure limiting valve 6 can be designed with reference to the prior art and will not be described in detail herein.

Claims

1. A clamp-type pressure cooker, comprising: Pot body (1); A pot cover (2) capable of covering the pot body (1); At least two clamps (3) are arranged on the pot cover (2) along the circumference and are used to lock the pot cover (2) and the pot body (1); A driving device (4) is connected to each clamp (3) in a transmission manner and is used to drive each clamp (3) to move and open or close; The driving device (4) comprises: A first rocker (41), the middle of which is rotatably connected to the pot cover (2), and the first end (411) and the second end (412) of which are free ends that can rotate up and down relative to the pot cover (2); A driving plate (42) is disposed on the pot cover (2) in a manner capable of being laterally moved and connected to the clamp (3). The driving plate (42) is arranged to be transmission-connected to the first rocking arm (41) and to be capable of being laterally moved to open the clamp (3) when the second end (412) of the first rocking arm (41) rotates downward, and to be capable of being reversely moved to close the clamp (3) when the second end (412) of the first rocking arm (41) rotates upward; A first elastic member (43) acts on the driving plate (42) or the first rocking arm (41) so that the second end (412) of the first rocking arm (41) always has a tendency to rotate downward; The feature of the driving device (4) is that it also includes: A locking member (44) is rotatably disposed on the pot cover (2). The locking member (44) is arranged to be rotatable to a first position and a second position. When in the first position, the locking member (44) is locked with the second end (412) of the first rocking arm (41) to restrict the second end (412) of the first rocking arm (41) from rotating downward. When in the second position, the locking member (44) is disengaged from the second end (412) of the first rocking arm (41) to be unlocked, so that the second end (412) of the first rocking arm (41) can rotate downward. a second elastic member (45) acting on the locking member (44) so ​​that the locking member (44) always has a tendency to rotate to the first position; A cover opening button assembly acts on the locking member (44) to drive the locking member (44) to rotate to a second position; A slot (414) is provided on the side wall of the second end (412) of the first rocking arm (41), and at least a part of the locking member (44) is inserted into the slot (414) when the locking member (44) is rotated to the first position, and is disengaged from the slot (414) when the locking member (44) is rotated to the second position; after the second end (412) of the first rocking arm (41) is rotated downward, the locking member (44) abuts against the side wall of the second end (412) of the first rocking arm (41) and is maintained in the second position; after the second end (412) of the first rocking arm (41) is rotated upward, the locking member (44) is rotated toward the first position and inserted into the slot (414); The first end portion (411) of the first rocker (41) is arranged to support the pot cover (2) after it is rotated upward so that the pot cover (2) is placed upright on a plane; The lid opening button assembly comprises a second rocking arm (48) and a transmission member (49); the middle portion of the second rocking arm (48) is rotatably connected to the pot cover (2); the inner end portion and the outer end portion of the second rocking arm (48) are free ends that can rotate up and down relative to the pot cover (2); and the inner end portion of the second rocking arm (48) is opposite to the second end portion (412) of the first rocking arm (41); the transmission member (49) is connected to the inner end portion of the second rocking arm (48) and the locking member (44) to convert the upward rotational force of the inner end portion of the second rocking arm (48) into a force for driving the locking member (44) to rotate to the second position.

2. The clamp type pressure cooker according to claim 1, characterized in that: The locking member (44) and the second elastic member (45) are provided in at least two groups and are respectively arranged on both sides of the second end (412) of the first rocker (41); correspondingly, the locking grooves (414) are provided in at least two groups and are respectively opened on the two side walls of the second end (412) of the first rocker (41).

3. The clamp type pressure cooker according to claim 1 or 2, characterized in that: The transmission member (49) comprises a slider (491) and a connecting rod (492); the slider (491) is connected to the inner end of the second rocker (48), and the slider (491) is connected to the pot cover (2) in a manner that it can move up and down; one end of the connecting rod (492) is rotationally connected to the slider (491), and the other end is rotationally connected to the locking member (44).

4. The clamp type pressure cooker according to claim 3, characterized in that: The slider (491) is provided with a first pin shaft (493), and one end of the connecting rod (492) is provided with a round hole (494) for the first pin shaft (493) to pass through; the other end of the connecting rod (492) is in a C-shaped structure with an opening (495), and the locking member (44) is provided with a second pin shaft (442) that can be inserted into the opening (495).

5. The clamp type pressure cooker according to claim 4, characterized in that: The locking members (44) have at least two and are respectively arranged on both sides of the second end (412) of the first rocker (41); the second pin shaft extends along the length direction of the first rocker (41) and is exposed outside the end surface of the second end (412) of the first rocker (41); the connecting rod (492) has at least two and is respectively arranged on the outer side of the end surface of the second end (412) of the first rocker (41) corresponding to their respective locking members (44), at least two connecting rods (492) are located between the above-mentioned locking members (44) and are distributed in a V shape, each opening (495) is located at the upper part of the connecting rod (492) and is rotatably connected to its respective second pin shaft (442), and each circular hole (494) is located at the lower part of the connecting rod (492) and is arranged adjacent to each other; and at least two of the above-mentioned first pin shafts (493) are provided on the slider (491).

6. The clamp type pressure cooker according to claim 1 or 2, characterized in that: The cover opening button assembly also includes a third elastic member (40), which acts below the outer end of the second rocker (48) so that the outer end of the second rocker (48) always has a tendency to rotate upward.

7. The clamp type pressure cooker according to claim 3, characterized in that: The invention also comprises a main panel (5), which is mounted on the pot cover (2); the cover opening button assembly, the locking member (44), the second elastic member (45) and the first rocker (41) are arranged on the main panel (5); the driving plate (42) is arranged between the main panel (5) and the pot cover (2); the sliding block (491) is provided with a vertically extending sliding groove (490); the main panel (5) has a vertically extending sliding bar portion (52) which cooperates with the above-mentioned sliding groove (490) and is inserted into the sliding groove (490); the main panel (5) is provided with a mounting seat (51); the locking member (44) is a locking block which is rotatably connected to the mounting seat (51) through a rotating shaft (441); the second elastic member (45) is a torsion spring sleeved on the rotating shaft (441), and the two ends of the torsion spring act on the mounting seat (51) and the locking block respectively.

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