WO2008011768A1

WO2008011768A1 - A cover opening and closing mechanism for pressure cooker

Info

Publication number: WO2008011768A1
Application number: PCT/CN2007/000315
Authority: WO
Inventors: Jun Chen; Hua Wang
Original assignee: Zhejiang Supor Co., Ltd
Priority date: 2006-07-21
Filing date: 2007-01-29
Publication date: 2008-01-31
Also published as: CN100464682C; CN1899170A

Abstract

A cover opening and closing mechanism for pressure cooker is arranged between the cooker body (1) and the cooker cover (2) and includes at least two tongs (3) for fasten the edges of the cooker body (1) and the cooker cover (2). Numbers of connecting rods (4) that have the same amount with the tongs (3) are hinged with the cooker cover (2). The front ends of the connecting rods (4) are hinged with the tongs (3). A rotating disc (5) is arranged in the middle of the cooker cover (2). Said rotating disc (5) forces the connecting rods (4) to swing about the hinging point of the connecting rods (4) and the cooker cover (2).

Description

Pressure cooker opening and closing cover structure

The invention relates to the technical field of daily necessities, and in particular to a novel pressure cooker capping structure for use on a pressure cooker. Background technique

In order to achieve a tight fit between the pot body and the lid, in order to safely raise the pressure in the pot, various types of pressure cookers have been designed. According to the closed form, it can be divided into a rotary pressure cooker, a gland pressure cooker, a capped pressure cooker, a clamp type pressure cooker, and the like.

At present, the application range of the rotary pressure cooker is the most extensive. By rotating the lid, the upper and lower teeth of the pot body and the lid are originally snapped together to achieve the purpose of sealing. However, the safety performance of the pressure cooker of such a structure is difficult to be secured, and it is easy to have a safety hazard. Improper use is prone to accidents. Moreover, the mold for making the pot body and the lid is very complicated, the mold life is not long, and the product dimensional accuracy is not high. In order to improve safety performance, various types of auxiliary safety mechanisms are often required, which complicates the overall structure and is inconvenient to operate. It is also possible to increase the safety of the pressure cooker by increasing the material thickness of the entire device or by using a high-strength material; obviously, this makes the pressure cooker bulky and the manufacturing cost increases. On the other hand, when in use, the stroke of the opening and closing cover is too long, and the fit is tight, which is inconvenient for the consumer.

To this end, people have conducted long-term explorations and proposed various types of clamp-type pressure cookers. For example, the Chinese patent document discloses a rotary clamp type pressure cooker application number -

CN02284718. 9 , comprising a pot body, a lid covering the pot body, a pressure limiting valve mounted on the lid, a lid handle provided on the lid, and a clamp that can be clamped on the body and the lid, A guiding rod is arranged on the clamp, and the pot cover is provided with a guiding groove for accommodating the guiding rod, one end of the connecting rod is movably connected with the clamp, and the other end is movably connected with the central shaft of the lid handle. Someone applied for a smooth matching mechanism called a pressure cooker lid: CN01225144. The patent of 5, the runner is placed on the central part of the lid, and the central part of the runner is provided with a square hole so as to correspond to the square central axis protruding downward from the handle installed at the center of the plastic cover, which is convenient for extraction. Or insert and operate to rotate, one end of the connecting rod is connected to the rotating wheel through the rotating column, and the other end is connected by a rivet to the lower guiding rod thereof, and the lid and the pot body are clamped by the clamp.

The above-mentioned clamp type pressure cooker improves the safety performance to a certain extent and simplifies the structure, but still has certain defects. For example: 1. The clamps are all attached to the connecting rod, and are moved along the lid by the connecting rod to achieve the purpose of fastening the lid and the edge of the pot body. A slight swing will result in the clamp not being tightly attached to the lid and the edge of the pot, and the safety is not high. 2. The connecting rod is stretched for a long time when it is used, and it is easy to deform after long time use; the distance of the radial movement of the connecting rod is preset and cannot be adjusted, which will cause the clamp to buckle in place. . 3. The overall structure is still complicated, the production cost is high, the work stability is difficult to be guaranteed, and the safety hazards of the pressure cooker cannot be completely eliminated.

+ There are similar deficiencies in other existing types of pressure cooker closures. Disclosure of invention

The object of the present invention is to provide a novel pressure cooker opening and closing cover structure with reasonable design, close matching of the clamp with the edge of the pot lid and the pot body, high work stability, safety and reliability; The stability of the work is not high, and the clamps are not closely matched with the edges of the lid and the pot body, and the technical performance of the safety performance is difficult to be secured.

Another object of the present invention is to provide a new type of pressure cooker opening and closing cover which has long service life and long-term use without deteriorating safety performance, and can adjust the fit of the clamp to the edge of the lid and the pot body according to the specific situation. The structure solves the technical problem that the prior art has long-term use, which causes mismatching, and the effective use time is short.

Another object of the present invention is to provide a low precision requirement for the above problems. The new pressure cooker opening and closing cover structure with low cost and convenient user operation can solve the technical problems of high precision, high production cost and difficult operation in the prior art.

In order to achieve the above object, the present invention adopts the following technical solutions: The new pressure cooker opening and closing cover structure is disposed between the pot body and the lid of the pressure cooker, and includes at least two edges for engaging the lid of the lid and the pot body. The clamp is characterized in that: a connecting rod equal to the number of clamps is hinged on the lid, and the front end portion of the connecting rod is hinged with the clamp, and a turntable is arranged in the center of the lid, and the turntable can be dialed The rod swings about its hinge point with the lid.

In the initial state, usually each link coincides with the radial direction of the lid. During the rotation, the rotary disk drives the connecting rod to swing around its hinge point with the lid, so that the connecting rod is offset from the original position coincident with the radial direction of the lid, forming an angle between the two. As the swing angle increases, the front end of the connecting rod gradually approaches the edge of the lid and the pot body. Since the clamp is hinged at the front end of the connecting rod, the clamp is fastened to the edge of the lid and the pot. The present invention creatively alters the manner in which the prior art employs radial movable clamps to effectively overcome the deficiencies of the above described approach. Of course, the shape of the turntable here can be designed in a variety of forms, such as polygons, circles, ovals, and the like. The invention can adjust the rotation angle of the turntable according to the situation, so as to adapt to the change of the size of each part after long-term use, so that the clamp closely matches the edge of the lid and the pot body. If the connecting rod is elongated due to long-term use, the above effect can be eliminated by increasing the angle of rotation.

When the dial is swung during the rotation of the turntable, the connection between the two can be varied. In the above-mentioned new pressure cooker opening and closing cover structure, the center of the lid is fixedly connected with a chassis through a shaft pin, and the inner ends of the connecting rods are respectively hinged to the chassis through a pivot shaft, and each connecting rod is respectively provided with one The strip-shaped hole is provided with the same number of bar-shaped holes corresponding to the strip-shaped holes, and the respective pin-shaped pins are respectively inserted in the strip-shaped holes. During the rotation of the turntable, the stop pin can drive the respective links to swing around the hinge point. During the swinging process, the stop pin slides from one end of the strip hole to the other end.

In the above-mentioned new pressure cooker opening and closing cover structure, the connecting clamp is fixedly connected with the connecting piece, and the connecting piece is hinged to the outer end of the connecting rod through the pivot shaft, and is disposed at the side of the connecting piece. Folding, one side of the connecting rod is provided with a rib for blocking the above-mentioned folded edge.

The above-mentioned hemming and ribs can be in contact with each other during use, and by the interaction of the two, the control connecting piece and the connecting rod are always on the same line, so that the control pliers will never swing to the left and right, ensuring that the cap can be opened normally. .

As another solution, in the above-mentioned new pressure cooker capping structure, the clamp is hinged to the outer end of the connecting rod by a pivot shaft 2, and a torsion spring is sleeved on the pivot shaft 2, the torsion spring Both ends act on the clamp and the connecting rod respectively.

During the swinging of the clamp, its positional relationship with respect to the edge of the lid and the pot body is in a changing state. If the angle is not adjusted, only the entire clamp can be fastened to the edge of the lid and the pot body, resulting in safety. Performance is not high. The clamps and the ends of the connecting rods are hinged to adjust the angle of the clamps in time so that they can be tightly fastened to the edges of the lid and the pot. The defects existing in the prior art in which the clamp and the end of the connecting rod are fixed are changed. During the closing process, one end of the clamp first comes into contact with the lid and the edge of the pot body, and since the clamp and the connecting rod are hinged, the connecting rod can continue to rotate. Under the action of the torsion spring, the entire clamp is fastened to the edge of the lid and the pot. The torsion spring ensures that the clamp will not disengage after the snap fit.

In the above-mentioned new pressure cooker opening and closing cover structure, a central torsion spring is arranged between the turntable and the chassis, and a central torsion spring is sleeved on the shaft pin, and its two legs respectively act on the turntable and the chassis. Under the action of the central torsion spring, there is always a force between the turntable and the chassis.

In the above-mentioned new pressure cooker opening and closing lid structure, the lid is provided with a stopper rod which can be raised and lowered under the pressure of the pot, and the stopper rod can be connected with the bayonet provided at the edge of the turntable. Buckle.

After the lid is closed, when there is pressure in the pot, the stopper can be automatically raised to enter the bayonet edge of the turntable, so that the turntable cannot be rotated, preventing misoperation and improving the safety of the pressure cooker. When the pressure in the pot drops, the stop lever will fall again, so that the stop lever is disengaged from the bayonet, and the turntable can rotate freely.

In the above-mentioned new pressure cooker opening and closing cover structure, the pot cover is fixedly connected with a limit rod corresponding to the connecting rod, and the limiting rod is rotated when the clamp is turned to the open position. Abut against the connecting piece of the clamp.

When the clamp is rotated to the open position, the connecting piece attached thereto and the limit lever on the lid are in contact with each other, so that the control clamp does not swing. At this time, the above-mentioned hems and ribs are also in contact with each other.

In the above-mentioned new pressure cooker opening and closing cover structure, the clamp is curved, and its curvature is adapted to the edge of the lid and the pot body; the cross section of the clamp is U-shaped, and a ring is arranged at the edge of the lid In the plane, the edge of the pot body is provided with a reverse edge, and the clamp is fastened on the annular plane and the reverse edge. With such a structure, the clamp can be firmly fastened to the pot body and the lid.

In the above-mentioned new pressure cooker opening and closing cover structure, the pot cover is evenly distributed with 2 to 6 connecting rods, and a clamp is respectively hinged at the end of each connecting rod. The number of linkages and clamps here can be set as required, but at least two must be provided, and the clamps are evenly arranged to ensure uniform force.

In the above-mentioned new pressure cooker opening and closing cover structure, the turntable is provided with a button, the button is composed of a rod body and a convex head, and a compression spring is arranged on the rod body, and an arc for the rod body of the button is arranged on the turntable. Shaped groove. Under the action of the compression spring, the button always has a tendency to move upwards. When the turntable is turned to the closed state, the rod is in the arcuate groove. When the turntable is rotated to the open state, the boss abuts against the opening of the arcuate slot, so that the turntable cannot rotate counterclockwise under the action of the central torsion spring. Of course, you need to press the button down when it is turned counterclockwise, which means that the pressure cooker needs to press the button first during the closing process.

Compared with the prior art, the advantages of the new pressure cooker opening and closing cover structure are -

1. The structure is simple and novel, the clamp is closely matched with the edge of the lid and the pot body, and the work stability is high, safe and reliable.

2. The running track of the clamp and the edge of the pot lid and the pot body is not the traditional radial movement, but is close to the arc through the swing of the connecting rod, and the clamp and the pot lid and the pot body can be adjusted according to specific conditions. The position of the edge is more flexible to use.

3. Long service life, low precision requirements, low production cost, and very convenient to use. DRAWINGS

1 is a cross-sectional view of the pressure cooker opening and closing lid structure of the present invention applied to a pressure cooker. Fig. 2 is a perspective structural view of the pressure cooker opening and closing cover structure of the present invention, which is applied to a pressure cooker without a turntable.

Fig. 3 is a perspective structural view of the turntable in the pressure cooker capping structure of the present invention.

Fig. 4 is a structural schematic view showing the open state of the pressure cooker opening and closing lid structure when applied to a pressure cooker.

Fig. 5 is a structural schematic view showing the structure of the pressure cooker opening and closing lid structure of the present invention when it is applied to a pressure cooker.

Fig. 6 is a structural schematic view showing the structure of the pressure cooker opening and closing lid of the present invention in a closed state when applied to a pressure cooker.

Fig. 7 is a perspective structural view showing the coupling of the clamp and the connecting rod in the composite pressure cooker cap structure of the present invention.

Figure 8 is a partially enlarged cross-sectional structural view taken along line A-A of the pressure cooker of Figure 6 in a high pressure state.

Figure 9 is a partially enlarged cross-sectional structural view of the line A-A of Figure 6 with the pressure cooker in a low pressure state.

Figure 10 is a partially enlarged cross-sectional structural view of B-B of Figure 4;

Figure 11 is a partially enlarged cross-sectional structural view of the C-C of Figure 6;

Figure 12 is a partial cross-sectional view showing another embodiment of the novel pressure cooker opening and closing cover structure.

In the figure, the pot body 1, the reverse edge la, the lid 2, the annular plane 2a, the clamp 3, the connecting piece 3a, the flange 3b, the inner wall 3c, the top surface 3d, the bottom surface 3e, the gap 3f, the connecting rod 4, the strip shape Hole 4a, rib 4b, turntable 5, stop pin 5a, bayonet 5b, center hole 5d, boss 5e, shaft pin 6, chassis 7, arcuate groove 7c, boss 2e, pivot axis 8, pivot Shaft 2, torsion spring 10, central torsion spring 11, stop lever 12, limit lever 13, button 14, lever 14a, boss 14b, compression spring 15, seal ring 16, upper leg 16a, lower leg 16b, body 16c . The best way to implement the invention

Example 1

The new pressure cooker opening and closing cover structure shown in Fig. 1, Fig. 2 and Fig. 3 is disposed between the pot body 1 and the lid 2 of the pressure cooker, and includes components such as a connecting rod 4, a clamp 3, a turntable 5, and a chassis 7.

As shown in Figs. 2 and 3, a center plate 7 is fixed to the center of the lid 2 via a shaft pin 6. The center of the turntable 5 is provided with a center hole 5d, and the turntable 5 is fitted over the above-mentioned pin 6 through the center hole 5d. A center torsion spring 11 is disposed between the turntable 5 and the chassis 7, and the center torsion spring 11 is placed on the shaft pin 6, and its two legs act on the turntable 5 and the chassis 7, respectively. Specifically, the two legs of the center torsion spring 11 are respectively blocked by the bosses 5e on the turntable 5 and the bosses 7e on the chassis 7. Thus, under the action of the central torsion spring 11, there is always a force between the turntable 5 and the chassis 7.

As shown in Figs. 2 and 4 and Figs. 5 and 6, three circular clamps 3 are provided on the circular lid 2 to fasten the lid 2 and the edge of the pot 1. The three clamps 3 are evenly arranged with an angle of 120 ° between the two. The inner ends of the respective links 4 are hinged to the chassis 7 via pivots 8, respectively, and each of the links 4 is provided with a strip-shaped hole 4a. The turntable 5 is provided with the stopper pins 5a which are equal in number and one-to-one corresponding to the strip-shaped holes 4a, and the respective stopper pins 5a are respectively inserted in the strip-shaped holes 4a. During the rotation of the turntable 5, the stopper pin 5a can drive the respective links 4 to swing around the hinge point. During the swinging process, the stopper pin 5a slides from one end of the strip hole 4a to the other end.

As shown in Fig. 7, the connecting piece 3a is fixed to the clamp 3, and the connecting piece 3a is hinged to the outer end of the connecting rod 4 via the pivot shaft 9, and a folded edge 3b is provided on the side of the connecting piece 3a. One side of the link 4 is provided with a rib 4b for blocking the above-mentioned flange 3b. The flange 3b and the rib 4b can be in contact with each other during use, and by the interaction of the two, the control piece 3a and the link 4 are always on the same line, so that the control clamp 3 does not sway from side to side, ensuring its Can open the cover normally.

As shown in FIG. 3 and FIG. 6 and FIG. 8 and FIG. 9, the lid 2 is provided with a stopper rod 12 which can be lifted and lowered under the pressure, and the stopper rod 12 can be disposed on the side of the turntable 5 The edge of the bayonet 5b is buckled. After the lid 2 is closed, when there is pressure in the pot, the stopper rod 12 can be automatically raised to enter the bayonet 5b at the edge of the turntable 5, so that the turntable 5 cannot be rotated, preventing misoperation and improving the safety of the pressure cooker. Sex. When the pressure in the pot is lowered, the stopper rod 12 is lowered again, so that the stopper rod 12 is disengaged from the bayonet 5b, and the turntable 5 can be freely rotated.

As shown in FIG. 2, FIG. 4, FIG. 5 and FIG. 6, the lid 2 is fixedly connected with a limiting rod 13 corresponding to the connecting rod 4, and the limiting rod 13 is rotated when the clamp 3 is turned to the open position, The connecting piece 3a of the clamp 3 abuts against it. As shown in Fig. 4, when the clamp 3 is rotated to the open position, the connecting piece 3a attached thereto and the stopper rod 13 on the lid 2 are in contact with each other, so that the control jaw 3 does not swing. Since the connecting piece 3a and the link 4 are on the same straight line in the open state, the folded edge 3b and the rib 4b are also in contact with each other at this time.

As shown in Fig. 1, a turn button 5 is provided in the turntable 5. The button 14 is composed of a rod body 14a and a boss 14b. A compression spring 15 is sleeved on the rod body 14a, and a rod body 14a for the button 14 is provided on the turntable 5. Curved groove 7c. Under the action of the compression spring 15, the button 14 always has a tendency to move upward. When the turntable 5 is rotated to the closed state, the rod 14a is in the arcuate groove 7c. When the turntable 5 is rotated to the open state, the projection 14b abuts against the opening of the arcuate groove 7c, so that the turntable 5 cannot be rotated counterclockwise by the central torsion spring 11.

As shown in Figs. 10 and 11, the clamp 3 has an arc shape whose curvature is adapted to the edge of the lid 2 and the pot 1. The center angle corresponding to the clamp 3 is 15 degrees. This ensures that the clamp 3 is tightly fastened and balanced. The cross section of the clamp 3 is U-shaped, and an annular plane 2a is provided at the edge of the lid 2. The edge of the pot body 1 is provided with a reverse edge la, and the clamp 3 is fastened to the annular plane 2a and the reverse edge la.

As shown in Fig. 10, the inner wall 3c, the top surface 3d, and the bottom surface 3e of the clamp 3 are not completely engaged with the lid 2 and the edge of the pot body 1. There is a gap 3f between the inner wall 3c and the lid 2 and the edge of the pot body 1. At this time, the clamp 3 and the link 4 are still in a vertical state.

As shown in FIG. 11, since the clamp 3 is hinged at the front end portion of the link 4, the rotation continues. The connecting rod 4, the clamp 3 will rotate clockwise, so that the clamp 3 is completely fastened to the edge of the lid 2 and the pot body 1. That is, the inner wall 3c of the clamp 3 is completely in contact with the edge of the lid 2 and the pot body 1 with no gap 3f therebetween, and the top surface 3d and the bottom surface 3e are in contact with the annular plane 2a and the reverse edge la, respectively.

In this embodiment, the rotation angle of the turntable 5 can be adjusted according to the situation to adapt to the change in the size of each part after long-term use, so that the clamp 3 closely matches the edge of the lid 2 and the pot body 1. In the present invention, the running path of the clamp 3 to the edge of the lid 2 and the pot 1 is not a conventional radial movement, but is arcuately close by the swing of the connecting rod 4.

In this embodiment, a sealing ring 16 is disposed between the lid 2 and the pot body 1. The sealing ring 16 has a V-shaped cross section, and the upper leg 16a can rest against the inner wall of the lid 2, and the lower leg 16b can rest against the pot. The inner wall of the body 1. The seal 16 main body 16c is disposed in the annular flat surface 2a of the edge of the lid 2. The seal ring 16 in this embodiment is made of an elastic, high temperature resistant, non-toxic plastic. The swing range of the connecting rod 4 is 10 to 60 degrees. As the swing angle increases, the front end portion of the link 4 gradually approaches the edge of the lid 2 and the pot body 1.

Example 2:

As shown in Fig. 12, the clamp 3 is hinged at the outer end of the connecting rod 4 via a pivot shaft 9, and a torsion spring 10 is disposed on the pivot shaft 9, and the two ends of the torsion spring 10 respectively act on the clamp 3 and the connecting rod. 4 on. During the swinging of the clamp 3, its positional relationship with respect to the edge of the lid 2 and the pot body 2 is in a changing state. If the angle is not adjusted, only the entire clamp 3 can be fastened to the lid 2 and the pot body. The edge of 1. This embodiment can adjust the angle of the clamp 3 in time so as to be tightly fastened to the edges of the lid 2 and the pan 1. The torsion spring 10 ensures that the clamp 3 does not disengage after being buckled. Further, in order to prevent the torsion spring 10 from coming off, the top of the pivot shaft 9 for fixing the torsion spring 10 has a top cap.

The clamp 3 of the present embodiment can not only restrict the up and down movement of the lid 2 and the edge of the pot body 1, but also can apply a radial pressure under the action of the torsion spring 10, so that the force of the entire device is more reasonable. The rest are the same as those in the first embodiment, and will not be described in detail herein.

The specific embodiments described herein are merely illustrative of the spirit of the present invention. Bright. A person skilled in the art can make various modifications or additions to the specific embodiments described, or in a similar manner, without departing from the spirit of the invention or as defined by the appended claims. The scope.

Although the body 1 is used more frequently, the reverse edge la, the lid 2, the annular plane 2a, the clamp 3, the connecting piece 3a, the flange 3b, the inner wall 3c, the top surface 3d, the bottom surface 3e, the gap 3f, the connecting rod 4. Strip hole 4a, rib 4b, turntable 5, stop pin 5a, bayonet 5b, center hole 5d, boss 5e, shaft pin 6, chassis 7, arcuate groove 7c, boss 2e, pivot 8. Pivot 2, torsion spring 10, central torsion spring 11, stop lever 12, limit lever 13, button 14, rod body 14a, boss 14b, compression spring 15, seal ring 16, upper leg 16a, lower leg Terms such as 16b, main body 16c, etc., but do not exclude the possibility of using other terms. These terms are only used to more easily describe and explain the nature of the invention; any of these additional limitations are inconsistent with the spirit of the invention.

Claims

Rights request

1. A new pressure cooker opening and closing cover structure is arranged between the pot body (1) of the pressure cooker and the lid (2), including at least two edges for engaging the lid of the lid (2) and the pot body (1) a clamp (3) together, characterized in that a connecting rod (4) equal in number to the clamp (3) is hinged on the lid (2), the front end of the connecting rod (4) and the clamp (3) ) Hinged, there is a turntable (5) in the center of the lid (2). The turntable (5) can swing the connecting rod (4) around its hinge point with the lid (2).

The new pressure cooker opening and closing cover structure according to claim 1, characterized in that: the center of the lid (2) is fixedly connected with a chassis (7) through a shaft pin (6), and each connecting rod (4) The inner ends are respectively hinged to the chassis (7) via a pivot shaft (8), and each of the connecting rods (4) is respectively provided with a strip hole (4a), and the above-mentioned turntable (5) is provided with a strip hole ( 4a) A number of identical and one-to-one corresponding pins (5a), each of which is inserted into the strip hole (4a).

The new pressure cooker opening and closing cover structure according to claim 1, wherein the clamp (3) is fixedly connected with a connecting piece (3a), and the connecting piece (3a) is passed through a pivot two (9) Hinged to the outer end of the connecting rod (4), a flange (3b) is provided on the side of the connecting piece (3a), and one side of the connecting rod (4) is provided with a rib for blocking the above-mentioned folded edge (3b) (4b).

The new pressure cooker opening and closing cover structure according to claim 1, characterized in that: the clamp (3) is hinged at the outer end of the connecting rod (4) by a pivot shaft (9), at the pivot shaft (9) The upper sleeve has a torsion spring (10), and the torsion springs (10) are respectively applied to the clamp (3) and the connecting rod (4).

The new pressure cooker opening and closing cover structure according to claim 1 or 2 or 3 or 4, characterized in that: a central torsion spring (11) is arranged between the turntable (5) and the chassis (7), The center torsion spring (11) fits over the pin (6) and its two feet act on the turntable (5) and the chassis (7).

6. The novel pressure cooker opening and closing cover structure according to claim 5, characterized in that The above-mentioned lid (2) is provided with a stopper rod (12) which can be raised and lowered under the pressure of the pot, and the stopper rod (12) can be arranged on the edge of the turntable (5). The bayonet (5b) is snapped.

The new pressure cooker opening and closing cover structure according to claim 5, wherein the lid (2) is fixedly connected with a limiting rod (13) corresponding to the connecting rod (4). The limit lever (13) is placed against the connecting piece (3a) of the clamp (3) when the clamp (3) is rotated to the open position.

The new pressure cooker opening and closing cover structure according to claim 5, wherein the clamp (3) has an arc shape, and the curvature thereof is adapted to the edge of the lid (2) and the pot body (1). The clamp (3) has a U-shaped cross section, an annular plane (2a) at the edge of the lid (2), and a reverse edge (la) at the edge of the pot (2a), the clamp (3) Fastened on the above circular plane (2a) and reverse edge (la).

The new pressure cooker opening and closing cover structure according to claim 5, characterized in that the pot cover (2) is evenly distributed with 2 to 6 connecting rods (4), each connecting rod

A clamp (3) is hinged to the end of (4).

The new pressure cooker opening and closing cover structure according to claim 5, wherein the turntable (5) is provided with a button (14), and the button (14) is composed of a rod body (14a) and a protruding head (14b). The composition has a compression spring (15) on the rod body (14a) and an arcuate groove for the rod (14a) of the button (14) to enter on the turntable (5).

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