Pressure limiting structure and pressure cooker having the same

Abstract

The present invention provides a pressure limiting structure and a pressure cooker having the same. The pressure limiting structure includes a fixing plate, a weight assembly and an adjusting member. The lower part of the fixing plate is used for arranging an exhaust pipe; the blocking part of the weight assembly is used for being inserted into the pipe orifice of the exhaust pipe to form a blocking effect on the exhaust pipe; at least part of the weight assembly is arranged above the fixing plate; the weight assembly includes a plurality of weights, and the plurality of weights are sequentially stacked in a direction away from the fixing plate to play a pressure limiting role through the plurality of weights; the adjusting member is in transmission connection with at least part of the weights among the plurality of weights to adjust the number of weights pressing on the fixing plate by lifting at least part of the weights among the plurality of weights, and further realize multi-level pressure limiting by adjusting the number of weights pressing on the fixing plate, so as to solve the problem that the pressure limiting method of the pressure cooker in the prior art cannot realize multi-level pressure limiting.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular, to a pressure limiting structure and a pressure cooker having the same. Background Art

[0002] A pressure cooker, also known as a pressure pot or pressure cooker, is a kitchen utensil. By using the physical phenomenon that the boiling point of a liquid increases at a higher air pressure, the pressure cooker applies pressure to water so that the water can reach a higher temperature without boiling, thereby accelerating the cooking efficiency of stewed food. It can heat the food to be steamed above 100°C. In high-altitude areas, using a pressure cooker can avoid the problem that the boiling point of water decreases and it is not easy to cook food.

[0003] However, the existing pressure cooker limits the pressure by setting a pressure limiting valve with a fixed weight on the exhaust pipe, but this pressure limiting method cannot achieve multi-stage pressure limiting. Summary of the Invention

[0004] The main object of the present invention is to provide a pressure limiting structure and a pressure cooker having the same, so as to solve the problem that the pressure limiting method of the existing pressure cooker cannot achieve multi-stage pressure limiting.

[0005] To achieve the above object, according to one aspect of the present invention, there is provided a pressure limiting structure, which includes: a fixing plate, the lower part of the fixing plate is used for arranging an exhaust pipe; a weight assembly, at least part of the weight assembly is arranged above the fixing plate; the weight assembly has a blocking part for being inserted into the pipe orifice of the exhaust pipe; the weight assembly includes a plurality of weights, and the plurality of weights are stacked in sequence along the direction away from the fixing plate; an adjusting member, the adjusting member is in transmission connection with at least part of the plurality of weights to adjust the number of weights pressing on the fixing plate by lifting at least part of the plurality of weights.

[0006] Further, the adjusting member includes a rotating disk, a positioning block is arranged on the rotating disk, and the weight assembly has a positioning groove, so as to adjust the cooperation relationship between the positioning block and the positioning groove by rotating the rotating disk to lift or release at least part of the plurality of weights.

[0007] Further, there is one positioning block and a plurality of positioning grooves, and at least two of the plurality of positioning grooves have a depth difference in the vertical direction, so as to lift the height of at least part of the plurality of weights by inserting the positioning block into the corresponding positioning groove; or, both the positioning block and the positioning groove are a plurality, and the plurality of positioning blocks and the plurality of positioning grooves are both arranged along the circumferential direction of the rotating disk; at least two of the plurality of positioning blocks have a height difference in the vertical direction, and at least two of the plurality of positioning grooves have a depth difference in the vertical direction, so as to lift the height of at least part of the plurality of weights by inserting each positioning block into the corresponding positioning groove.

[0008] Further, the positioning groove is a strip-shaped groove, and along the rotation direction of the rotating disk, the top wall of the positioning groove extends gradually in the vertical direction; the positioning block is inserted into the positioning groove so that when the rotating disk rotates, at least part of the weights among the plurality of weights are lifted or released through the cooperation between the top wall of the positioning block and the top wall of the positioning groove.

[0009] Further, the adjusting member further includes a push rod, and the push rod is arranged on the rotating disk to drive the rotating disk to rotate by pushing the push rod.

[0010] Further, there are a plurality of positioning blocks, and at least two of the plurality of positioning blocks have a height difference in the vertical direction, and the plurality of positioning blocks are arranged at intervals along the circumferential direction of the rotating disk; there are a plurality of push rods, and the plurality of push rods are arranged at intervals along the circumferential direction of the rotating disk, and the plurality of push rods and the plurality of positioning blocks are arranged in one-to-one correspondence.

[0011] Further, the weight assembly includes a first weight, the blocking portion is arranged on the first weight, and the first weight is arranged on the fixing plate; wherein, the adjusting member is arranged at an interval from the first weight, and the adjusting member is in limit cooperation with the weight located above the first weight.

[0012] Further, a positioning column is arranged on the first weight, a positioning hole is arranged on the fixing plate, and the positioning column is inserted into the positioning hole.

[0013] Further, the weight assembly further includes a secondary weight assembly, at least part of the secondary weight assembly is arranged above the first weight, the secondary weight assembly has a pressing column, and a pressing groove is arranged on the first weight, and the pressing column is inserted into the pressing groove.

[0014] Further, the outer peripheral surface of the pressing column is polygonal, and the pressing groove is a polygonal groove adapted to the outer peripheral surface of the pressing column.

[0015] Further, the secondary weight assembly includes a second weight, the pressure limiting structure further includes a rotating disk, and the rotating disk is rotatably sleeved on the pressing column; a first positioning block is arranged on the disk surface of the rotating disk, and a first positioning groove adapted to the first positioning block is arranged on the end surface of the second weight; wherein, the second weight has a first initial state in which its gravity is pressed on the first weight and a first lifting state in which its gravity is separated from the first weight; when the second weight is in the first initial state, the first positioning block is inserted into the first positioning groove.

[0016] Further, a second positioning block is arranged on the disk surface of the rotating disk, and a second positioning groove adapted to the second positioning block is arranged on the end surface of the second weight; the height of the first positioning block is greater than the height of the second positioning block; wherein, when the second weight is in the first initial state, the second positioning block is inserted into the second positioning groove; when the second weight is in the first lifting state, the first positioning block is inserted into the second positioning groove to lift the second weight.

[0017] Further, the first positioning block and the second positioning block are arranged in pairs, and the paired first positioning block and second positioning block are arranged at intervals along the circumferential direction of the rotating disk.

[0018] Further, the pressing column is arranged on the second weight.

[0019] Further, the secondary weight assembly includes a third weight, at least part of the second weight is arranged above the third weight; a third positioning block is arranged on the disk surface of the rotating disk, and the third positioning block is arranged inside the first positioning block; a third positioning groove for avoiding the third positioning block is arranged on the third weight, and the third positioning groove extends along the circumferential direction of the third weight; wherein, the third weight has a second initial state in which its gravity is pressed on the first weight and a second lifting state in which its gravity is separated from the first weight; when the third weight is in the second initial state, the third positioning block is located in the third positioning groove; when the third weight is in the second lifting state, at least part of the third positioning block is moved out of the third positioning groove to lift the third weight.

[0020] Further, a second positioning groove and a fourth positioning groove are arranged on the second weight, and the depths of the second positioning groove and the fourth positioning groove are both smaller than the depth of the first positioning groove; wherein, the rotating disk has a first working position, a second working position and a third working position arranged in sequence. When the rotating disk rotates between the first working position and the second working position, the third positioning block is located in the third positioning groove; when the rotating disk moves to the third working position, at least part of the third positioning block is moved out of the third positioning groove to lift the third weight; when the rotating disk is in the first working position, the first positioning block is located in the first positioning groove; when the rotating disk is in the second working position, the first positioning block is located in the second positioning groove to lift the second weight; when the rotating disk is in the third working position, the first positioning block is located in the fourth positioning groove to maintain the lifting of the second weight.

[0021] Further, a fourth positioning block is arranged on the disk surface of the rotating disk, the fourth positioning groove is matched with the fourth positioning block, and the height of the first positioning block is greater than the height of the fourth positioning block; wherein, when the rotating disk is in the first working position, the fourth positioning block is located in the fourth positioning groove.

[0022] Further, the second weight is sleeved on the third weight, a first limiting protrusion is arranged on the third weight, and a first limiting groove matched with the first limiting protrusion is arranged on the inner wall of the second weight; the outer peripheral surface of the first limiting protrusion and the inner peripheral surface of the first limiting groove are both polygonal.

[0023] Further, the pressing column is arranged on the third weight.

[0024] Further, the secondary weight assembly further includes a fourth weight. The second weight, the third weight, and the fourth weight are arranged in sequence along the direction closer to the first weight. A fifth positioning block is provided on the disk surface of the rotating disk, and the fifth positioning block is located inside the third positioning block. A fifth positioning groove for avoiding the fifth positioning block is provided on the fourth weight, and the fifth positioning groove extends along the circumferential direction of the fourth weight. Among them, the fourth weight has a third initial state in which its gravity is pressed on the first weight and a third lifting state in which its gravity is separated from the first weight. When the fourth weight is in the third initial state, the fifth positioning block is located in the fifth positioning groove. When the fourth weight is in the third lifting state, at least a part of the fifth positioning block moves out of the fifth positioning groove to lift the fourth weight.

[0025] Further, a second positioning groove, a fourth positioning groove, and a sixth positioning groove are provided on the second weight. The depths of the second positioning groove, the fourth positioning groove, and the sixth positioning groove are all smaller than the depth of the first positioning groove. Among them, the rotating disk has a first working position, a second working position, a third working position, and a fourth working position arranged in sequence. When the rotating disk rotates between the first working position and the second working position, the third positioning block is located in the third positioning groove. When the rotating disk moves between the first working position and the third working position, the fifth positioning block is located in the fifth positioning groove. When the rotating disk is in the first working position, the first positioning block is located in the first positioning groove, the third positioning block is located in the third positioning groove, and the fifth positioning block is located in the fifth positioning groove. When the rotating disk is in the second working position, the first positioning block moves into the second positioning groove to lift the second weight. When the rotating disk is in the third working position, the first positioning block moves into the fourth positioning groove to continue lifting the second weight, and at least a part of the third positioning block moves out of the third positioning groove to lift the third weight. When the rotating disk rotates to the fourth working position, the first positioning block moves into the sixth positioning groove to continue lifting the second weight, the third positioning block is located outside the third positioning groove to continue lifting the third weight, and at least a part of the fifth positioning block moves out of the fifth positioning groove to lift the fourth weight.

[0026] Further, a fourth positioning block and a sixth positioning block are provided on the disk surface of the rotating disk. The heights of the fourth positioning block and the sixth positioning block are both smaller than that of the first positioning block. The first positioning block, the fourth positioning block, and the sixth positioning block are arranged at intervals in sequence along the circumferential direction of the rotating disk. The fourth positioning groove is adapted to the fourth positioning block, and the sixth positioning groove is adapted to the sixth positioning block. When the rotating disk is in the first working position, the fourth positioning block is located in the fourth positioning groove, and the sixth positioning block is located in the sixth positioning groove.

[0027] Further, the pressure limiting structure further includes a pushing assembly. At least a part of the pushing assembly is movably arranged to push the push rod to rotate through the pushing assembly.

[0028] Further, the pushing component includes a push plate and a pushing block for pushing the push rod to rotate. The pushing block is arranged on the push plate, and the push plate is movably arranged along a preset direction to drive the push rod to rotate.

[0029] Further, the pushing block is fixedly connected to the push plate; alternatively, the pushing block is rotatably arranged on the push plate. The pushing block has a pushing state for pushing the push rod and a folded state for avoiding the push rod. When the pushing block is in the pushing state, a first preset angle is formed between the pushing surface of the pushing block in contact with the push rod and the plate surface of the push plate. When the pushing block is in the folded state, a second preset angle is formed between the pushing surface of the pushing block and the plate surface of the push plate. Wherein, the first preset angle is greater than the second preset angle.

[0030] Further, the pushing component further includes a support plate. The push plate is telescopically arranged on the support plate. The pushing block is rotatably arranged on the push plate through a rotating shaft. A torsion spring is sleeved on the rotating shaft to keep the pushing block in the pushing state for pushing the push rod. A slider is movably arranged on the support plate. The slider has an inclined surface in contact with the pushing block. The inclined surface is inclined to the moving direction of the slider, so that when the pushing block returns from the position separated from the inclined surface to the initial position, the pushing block is pressed by the slider to be in the folded state for avoiding the push rod.

[0031] Further, the pushing component includes a driving motor and a transmission gear. The transmission gear is arranged on the output shaft of the driving motor to drive the push rod to rotate through the tooth part of the transmission gear.

[0032] According to another aspect of the present invention, a pressure cooker is provided, which includes an exhaust pipe and the above pressure limiting structure, and the pressure limiting structure is pressed on the exhaust pipe.

[0033] Applying the technical solution of the present invention, the pressure limiting structure includes a fixing plate, a weight assembly and an adjusting component. The lower part of the fixing plate is used for arranging the exhaust pipe. The blocking part of the weight assembly is used for inserting into the pipe orifice of the exhaust pipe to form a blocking effect on the exhaust pipe. At least part of the weight assembly is arranged above the fixing plate. The weight assembly includes a plurality of weights, and the plurality of weights are stacked in sequence along the direction away from the fixing plate to play a pressure limiting role through the plurality of weights. The adjusting component is in transmission connection with at least part of the weights among the plurality of weights, that is, through the cooperation between the adjusting component and at least part of the weights among the plurality of weights, at least part of the weights among the plurality of weights can be lifted, and then the number of weights pressed on the fixing plate is adjusted by lifting at least part of the weights among the plurality of weights, that is, multi-level pressure limiting is realized by adjusting the number of weights pressed on the fixing plate. Applying this pressure limiting structure to a pressure cooker to limit the pressure of the pressure cooker can realize multi-level pressure limiting of the pressure cooker, thus solving the problem that the pressure limiting method of the pressure cooker in the prior art cannot realize multi-level pressure limiting. Description of the Drawings

[0034] The accompanying drawings of the specification, which form a part of this application, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0035] Figure 1 Shows the schematic diagram of the mating structure between the pressure-limiting structure after removing the pushing component and the exhaust pipe in the first embodiment according to the present invention;

[0036] Figure 2 Shows Figure 1 The internal sectional view of the mating structure between the pressure-limiting structure and the exhaust pipe in;

[0037] Figure 3 Shows Figure 1 The schematic diagram of the mating structure between the fixing plate of the pressure-limiting structure and the first weight in;

[0038] Figure 4 Shows Figure 1 The schematic diagram of the structure of the fixing plate of the pressure-limiting structure in;

[0039] Figure 5 Shows Figure 1 The schematic diagram of the structure of the first weight of the pressure-limiting structure in;

[0040] Figure 6 Shows Figure 1 The schematic diagram of the structure of the second weight of the pressure-limiting structure in;

[0041] Figure 7 Shows Figure 1 The schematic diagram of the state when the second weight of the pressure-limiting structure is in the first initial state in;

[0042] Figure 8 Shows the schematic diagram of the mating structure between the pressure-limiting structure after removing the pushing component and the exhaust pipe in the second embodiment according to the present invention;

[0043] Figure 9 Shows Figure 8 The explosion structure diagram of the mating structure between the pressure-limiting structure and the exhaust pipe in;

[0044] Figure 10 Shows Figure 8 The internal sectional view of the mating structure between the pressure-limiting structure and the exhaust pipe in;

[0045] Figure 11 Shows Figure 8 The schematic diagram of the structure of the adjusting component of the pressure-limiting structure in;

[0046] Figure 12 Shows Figure 8 The schematic diagram of the structure of the second weight of the pressure-limiting structure from one perspective in;

[0047] Figure 13 shows Figure 8 a schematic structural view of another perspective of the second weight of the pressure limiting structure in

[0048] Figure 14 shows Figure 8 a schematic view of the state of the rotating disk of the pressure limiting structure in when it is in the first working position;

[0049] Figure 15 shows Figure 8 a schematic view of the state of the rotating disk of the pressure limiting structure in when it is in the second working position;

[0050] Figure 16 shows Figure 8 a schematic view of the state of the rotating disk of the pressure limiting structure in when it is in the third working position;

[0051] Figure 17 shows a schematic structural view of the mating structure of the pressure limiting structure in Embodiment 3 of the present invention with the exhaust pipe after removing the pushing component;

[0052] Figure 18 shows Figure 17 an internal cross-sectional view of the mating structure of the pressure limiting structure in with the exhaust pipe;

[0053] Figure 19 shows Figure 17 a schematic structural view of one perspective of the second weight of the pressure limiting structure in ;

[0054] Figure 20 shows Figure 17 a schematic structural view of another perspective of the second weight of the pressure limiting structure in ;

[0055] Figure 21 shows Figure 17 a schematic structural view of the third weight of the pressure limiting structure in ;

[0056] Figure 22 shows Figure 17 a schematic structural view of the fourth weight of the pressure limiting structure in ;

[0057] Figure 23 shows Figure 17 a schematic structural view of the adjusting component of the pressure limiting structure in ;

[0058] Figure 24 shows Figure 17 a schematic view of the state of the rotating disk of the pressure limiting structure in when it is in the first working position;

[0059] Figure 25 shows Figure 17 a schematic view of the state of the rotating disk of the pressure limiting structure in when it is in the second working position;

[0060] Figure 26 shows the Figure 17 state diagram of the rotary disk of the pressure-limiting structure in when it is in the third working position;

[0061] Figure 27 shows the Figure 17 state diagram of the rotary disk of the pressure-limiting structure in when it is in the fourth working position;

[0062] Figure 28 shows the schematic structural diagram of an optional pushing component of the pressure-limiting structure according to the present invention;

[0063] Figure 29 shows the Figure 28 schematic structural diagram of the cooperation between the push plate and the pushing block of the pushing component in ;

[0064] Figure 30 shows the Figure 28 schematic diagram of a cooperation state between the pushing component and the push rod in ;

[0065] Figure 31 shows the Figure 28 schematic diagram of another cooperation state between the pushing component and the push rod in ;

[0066] Figure 32 shows the schematic structural diagram of another optional pushing component of the pressure-limiting structure according to the present invention;

[0067] Figure 33 shows the schematic structural diagram of yet another optional pushing component of the pressure-limiting structure according to the present invention.

[0068] Among them, the above-mentioned drawings include the following reference numerals:

[0069] 101, pressure-limiting structure; 104, exhaust pipe;

[0070] 110, fixed plate; 112, positioning hole; 113, relief hole;

[0071] 130, weight assembly;

[0072] 131, first weight; 1311, plugging portion; 1312, positioning post; 1313, pressing groove;

[0073] 132, second weight;

[0074] 135, positioning groove; 1351, first positioning groove; 1352, second positioning groove;

[0075] 136, pressing post;

[0076] 140. Adjusting component; 141. Rotating disk; 143. Push rod;

[0077] 142. Positioning block; 1421. First positioning block; 1422. Second positioning block;

[0078] 150. Pushing component;

[0079] 151. Pushing plate; 152. Pushing block; 1521. Pushing surface; 153. Support plate; 154. Rotating shaft; 155. Torsion spring; 156. Slide block; 1561. Inclined surface; 1571. First elastic member; 1572. Second elastic member; 158. Driving component;

[0080] 1591. Driving motor; 1592. Transmission gear;

[0081] 102. Pressure limiting structure;

[0082] 1321. First limiting groove;

[0083] 133. Third weight; 1331. First limiting protrusion;

[0084] 1353. Third positioning groove; 1354. Fourth positioning groove;

[0085] 1423. Third positioning block; 1424. Fourth positioning block;

[0086] 103. Pressure limiting structure;

[0087] 1332. Second limiting protrusion;

[0088] 134. Fourth weight; 1341. Second limiting groove;

[0089] 1355. Fifth positioning groove; 1356. Sixth positioning groove;

[0090] 1425. Fifth positioning block; 1426. Sixth positioning block. Detailed implementation manner

[0091] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0092] The present invention provides a pressure limiting structure. Please refer to Figures 1 to 33, the pressure limiting structure includes a fixed plate 110, a weight assembly 130, and an adjusting member 140. The exhaust pipe 104 is arranged below the fixed plate 110; at least part of the weight assembly 130 is arranged above the fixed plate 110; the weight assembly 130 has a blocking portion 1311 for inserting into the pipe orifice of the exhaust pipe 104; the weight assembly 130 includes a plurality of weights, and the plurality of weights are stacked in sequence along the direction away from the fixed plate 110; the adjusting member 140 is in transmission connection with at least part of the plurality of weights to adjust the number of weights pressing on the fixed plate 110 by lifting at least part of the plurality of weights.

[0093] In the pressure limiting structure of the present invention, the pressure limiting structure includes a fixed plate 110, a weight assembly 130, and an adjusting member 140. The exhaust pipe 104 is arranged below the fixed plate 110; the blocking portion 1311 of the weight assembly 130 is used for inserting into the pipe orifice of the exhaust pipe 104 to form a blocking effect on the exhaust pipe 104; the weight assembly 130 includes a plurality of weights, and the plurality of weights are stacked in sequence along the direction away from the fixed plate 110 to play a pressure limiting role through the plurality of weights; the adjusting member 140 is in transmission connection with at least part of the plurality of weights, that is, through the cooperation between the adjusting member 140 and at least part of the plurality of weights, at least part of the plurality of weights can be lifted, and then the number of weights pressing on the fixed plate 110 is adjusted by lifting at least part of the plurality of weights, that is, multi-level pressure limiting is achieved by adjusting the number of weights pressing on the fixed plate 110; applying this pressure limiting structure to a pressure cooker to limit the pressure of the pressure cooker can achieve multi-level pressure limiting of the pressure cooker, so as to achieve multi-level pressure protection and various cooking effects of the pressure cooker, thereby solving the problem that the pressure limiting method of the pressure cooker in the prior art cannot achieve multi-level pressure limiting.

[0094] In order to realize the cooperation between the adjusting member 140 and at least part of the plurality of weights of the weight assembly 130, the adjusting member 140 includes a rotating disk 141, and a positioning block 142 is arranged on the rotating disk 141. The weight assembly 130 has a positioning groove 135 to adjust the cooperation relationship between the positioning block 142 and the positioning groove 135 by rotating the rotating disk 141 to lift or release at least part of the plurality of weights.

[0095] Specifically, one way of cooperation between the positioning block 142 and the positioning groove 135 is as follows: there is one positioning block 142 and multiple positioning grooves 135. At least two of the multiple positioning grooves 135 have a depth difference in the vertical direction, so as to lift the height of at least some of the multiple weights by inserting the positioning block 142 into the corresponding positioning groove 135. That is, during the rotation of the rotating disk 141 with the positioning block 142, the positioning block 142 moves from the positioning groove 135 with a deeper depth to the positioning groove 135 with a shallower depth to lift the height of at least some of the multiple weights; then the positioning block 142 moves from the positioning groove 135 with a shallower depth to the positioning groove 135 with a deeper depth to release at least some of the multiple weights.

[0096] Alternatively, there are multiple positioning blocks 142 and multiple positioning grooves 135. The multiple positioning blocks 142 and the multiple positioning grooves 135 are both arranged along the circumferential direction of the rotating disk 141; at least two of the multiple positioning blocks 142 have a height difference in the vertical direction, and at least two of the multiple positioning grooves 135 have a depth difference in the vertical direction, so as to lift the height of at least some of the multiple weights by inserting each positioning block 142 into the corresponding positioning groove 135. In the specific implementation process, during the rotation of the rotating disk 141 with the positioning block 142, the positioning block 142 with a higher height among the multiple positioning blocks 142 moves from the corresponding positioning groove 135 with a deeper depth to the corresponding positioning groove 135 with a shallower depth to lift the height of at least some of the multiple weights; then the positioning block 142 with a higher height among the multiple positioning blocks 142 moves from the corresponding positioning groove 135 with a shallower depth to the corresponding positioning groove 135 with a deeper depth to release at least some of the multiple weights.

[0097] Specifically, another way of cooperation between the positioning block 142 and the positioning groove 135 is as follows: the positioning groove 135 is a strip-shaped groove. Along the rotation direction of the rotating disk 141, the top wall of the positioning groove 135 gradually extends in the vertical direction, so that the top wall of the positioning groove 135 is an inclined surface; the positioning block 142 is inserted into the positioning groove 135, so that when the rotating disk 141 rotates, at least some of the multiple weights are lifted or released through the cooperation between the top wall of the positioning block 142 and the top wall of the positioning groove 135. That is, by the top wall of the positioning block 142 contacting the top wall of the corresponding positioning groove 135, the lifting or releasing of at least some of the multiple weights is realized.

[0098] In order to realize the rotation of the rotating disk 141, the adjusting component 140 further includes a push rod 143. The push rod 143 is arranged on the rotating disk 141 to drive the rotating disk 141 to rotate by pushing the push rod 143.

[0099] Optionally, there are multiple push rods 143, and the multiple push rods 143 are arranged at intervals in the circumferential direction of the rotating disk 141; when there are multiple positioning blocks 142, at least two of the multiple positioning blocks 142 have a height difference in the vertical direction, the multiple positioning blocks 142 are arranged at intervals in the circumferential direction of the rotating disk 141, and the multiple push rods 143 and the multiple positioning blocks 142 are arranged in one-to-one correspondence.

[0100] The weight assembly 130 includes a first weight 131, a blocking portion 1311 is arranged on the first weight 131, and the first weight 131 is arranged on the fixed plate 110; wherein, the adjusting member 140 is arranged at an interval from the first weight 131 to avoid transmission between the first weight 131 and the adjusting member 140, that is, when the rotating disk 141 of the adjusting member 140 rotates, the first weight 131 does not rotate with it; the adjusting member 140 is in limit cooperation with the weight located above the first weight 131 to lift or release the weight located above the first weight 131 through the adjusting member 140. Specifically, the adjusting member 140 is arranged above the first weight 131.

[0101] To achieve the assembly between the first weight 131 and the fixed plate 110, as Figures 3 to 5 shown, a positioning column 1312 is arranged on the first weight 131, a positioning hole 112 is arranged on the fixed plate 110, and the positioning column 1312 is inserted into the positioning hole 112 to relatively fix the first weight 131 and the fixed plate 110.

[0102] Specifically, a relief hole 113 for making way for the blocking portion 1311 is further arranged on the fixed plate 110, so that the blocking portion 1311 passes through the relief hole 113 and is inserted into the lumen of the exhaust pipe 104.

[0103] Specifically, the weight assembly 130 further includes a secondary weight assembly, at least a part of the secondary weight assembly is arranged above the first weight 131, the secondary weight assembly has a pressing column 136, and a pressing groove 1313 is arranged on the first weight 131, and the pressing column 136 is inserted into the pressing groove 1313 to limit the secondary weight assembly in the direction perpendicular to its lifting direction, so that the secondary weight assembly is relatively fixed to the first weight 131 in the direction perpendicular to its lifting direction.

[0104] Optionally, the outer peripheral surface of the pressing column 136 is polygonal, and the pressing groove 1313 is a polygonal groove matching the outer peripheral surface of the pressing column 136 to ensure the limiting effect on the secondary weight assembly in the direction perpendicular to its lifting direction. In the specific implementation process, the outer peripheral surface of the pressing column 136 is attached to the inner wall surface of the pressing groove 1313.

[0105] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many different forms and should not be construed as being limited only to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present application is thorough and complete, and the concept of these exemplary embodiments is fully conveyed to those of ordinary skill in the art. In the drawings, for clarity, the thickness of layers and regions is enlarged, and the same reference numerals are used to denote the same devices, and thus their description will be omitted.

[0106] Embodiment 1

[0107] The pressure-limiting structure provided in this embodiment is the pressure-limiting structure 101 as shown in Figures 1 to 7 The weight assembly of the pressure-limiting structure 101 in this embodiment consists of a first weight 131 and a second weight 132, constituting a two-stage pressure limitation.

[0108] In this embodiment, as shown in Figure 1 , Figure 6 and Figure 7 , the secondary weight assembly includes a second weight 132. A rotating disk 141 is rotatably sleeved on a pressing column 136 so that the rotating disk 141 can rotate relative to the second weight 132; a first positioning block 1421 is provided on the disk surface of the rotating disk 141, and a first positioning groove 1351 adapted to the first positioning block 1421 is provided on the end surface of the second weight 132.

[0109] In the specific implementation process, the second weight 132 has a first initial state in which its gravity is pressed on the first weight 131 and a first lifted state in which its gravity is separated from the first weight 131; as shown in Figure 7 , when the second weight 132 is in the first initial state, the first positioning block 1421 is inserted into the first positioning groove 1351.

[0110] Specifically, a second positioning block 1422 is further provided on the disk surface of the rotating disk 141, and a second positioning groove 1352 adapted to the second positioning block 1422 is further provided on the end surface of the second weight 132; the height of the first positioning block 1421 is greater than the height of the second positioning block 1422, and the depth of the first positioning groove 1351 in the vertical direction is greater than the depth of the second positioning groove 1352 in the vertical direction.

[0111] As shown in Figure 7 , when the second weight 132 is in the first initial state, the second positioning block 1422 is inserted into the second positioning groove 1352; when the second weight 132 is in the first lifted state, the first positioning block 1421 is inserted into the second positioning groove 1352 to lift the second weight 132.

[0112] The first positioning block 1421 and the second positioning block 1422 are arranged in pairs, and the paired first positioning block 1421 and second positioning block 1422 are arranged at intervals along the circumferential direction of the rotating disk 141. The first positioning groove 1351 and the second positioning groove 1352 are arranged in pairs, and the paired first positioning groove 1351 and second positioning groove 1352 are arranged at intervals along the circumferential direction of the second weight 132.

[0113] A first positioning groove group is arranged on the second weight 132, and the first positioning groove group includes the paired first positioning groove 1351 and second positioning groove 1352; a first positioning block group is arranged on the rotating disk 141, and the first positioning block group includes the paired first positioning block 1421 and second positioning block 1422.

[0114] Optionally, a plurality of first positioning groove groups are arranged on the second weight 132, and the plurality of first positioning groove groups are arranged at intervals along the circumferential direction of the second weight 132; a set of first positioning block groups is arranged on the rotating disk 141. The first positioning block 1421 is located in the first positioning groove 1351 of one of the plurality of first positioning groove groups, and the second positioning block 1422 is located in the second positioning groove 1352 of this first positioning groove group, so that the second weight 132 is in the first initial state. During the rotation of the rotating disk 141 relative to the second weight 132, both the first positioning block 1421 and the second positioning block 1422 rotate with the rotating disk 141. When the first positioning block 1421 moves into the second positioning groove 1352 of this first positioning groove group, the first positioning block 1421 is inserted into the second positioning groove 1352 to lift the second weight 132, so that the second weight 132 is in the first lifted state; the second positioning block 1422 moves to the first positioning groove 1351 of the first positioning groove group adjacent to this first positioning groove group and at least partially inserts into this first positioning groove 1351.

[0115] Continue to rotate the rotating disk 141 so that the first positioning block 1421 moves into the first positioning groove 1351 of the first positioning groove group adjacent to this first positioning groove group and inserts into this first positioning groove 1351, so that the second weight 132 returns to its first initial state. At this time, the second positioning block 1422 moves into the second positioning groove 1352 of the first positioning groove group adjacent to this first positioning groove group and inserts into this second positioning groove 1352.

[0116] Optionally, a plurality of first positioning groove groups are provided on the second hammer 132, and the plurality of first positioning groove groups are arranged at intervals along the circumferential direction of the second hammer 132; a plurality of first positioning block groups are provided on the rotating disk 141, and the plurality of first positioning block groups are provided in one-to-one correspondence with the plurality of first positioning groove groups. The first positioning blocks 1421 and the second positioning blocks 1422 in each first positioning block group are respectively inserted into the first positioning grooves 1351 and the second positioning grooves 1352 of the corresponding first positioning groove group, so that the second hammer 132 is in the first initial state. During the rotation of the rotating disk 141 relative to the second hammer 132, when each first positioning block 1421 moves into the second positioning groove 1352 of its corresponding first positioning groove group and jacks up the second hammer 132, the second hammer 132 is in the first lifting state; at this time, each second positioning block 1422 moves into the first positioning groove 1351 of the first positioning groove group adjacent to its corresponding first positioning groove group. Continue to rotate the rotating disk 141 so that each first positioning block 1421 moves into the first positioning groove 1351 of the first positioning groove group adjacent to its corresponding first positioning groove group, so that the second hammer 132 resumes its first initial state. At this time, each second positioning block 1422 moves into the second positioning groove 1352 of the first positioning groove group adjacent to its corresponding first positioning groove group.

[0117] In this embodiment, as Figure 6 shown, the pressing column 136 is provided on the second hammer 132, that is, the rotating disk 141 is sleeved outside the second hammer 132.

[0118] In this embodiment, both the first positioning block 1421 and the second positioning block 1422 are of a conical structure. Along the direction away from the rotating disk 141, the cross-sectional areas of the first positioning block 1421 and the second positioning block 1422 gradually decrease, so as to facilitate the first positioning block 1421 and the second positioning block 1422 to move out of the first positioning groove 1351 and the second positioning groove 1352 respectively; wherein, the cross-sectional areas of the first positioning block 1421 and the second positioning block 1422 both refer to the areas of the cross-sections perpendicular to the central direction of the rotating disk 141.

[0119] Using the pressure limiting structure 101 in this embodiment, secondary pressure limiting can be achieved.

[0120] Please refer to Figures 28 to 33 For the purpose of driving the push rod 143, the pressure limiting structure 101 further includes a pushing assembly 150, and at least a part of the pushing assembly 150 is movably arranged to push the push rod 143 to rotate through the pushing assembly 150.

[0121] As Figures 28 to 31As shown, specifically, the pushing component 150 includes a push plate 151 and a pushing block 152 for pushing the push rod 143 to rotate. The pushing block 152 is arranged on the push plate 151. The push plate 151 is movably arranged along a preset direction so that when the push plate 151 moves along the preset direction, it drives the pushing block 152 to move, and the push rod 143 is pushed to rotate by the movement of the pushing block 152.

[0122] Specifically, the pushing block 152 is rotatably arranged on the push plate 151. The pushing block 152 has a pushing state for pushing the push rod 143 and a folded state for avoiding the push rod 143. When the pushing block 152 is in the pushing state, a first preset angle is formed between the pushing surface 1521 of the pushing block 152 in contact with the push rod 143 and the plate surface of the push plate 151. When the pushing block 152 is in the folded state, a second preset angle is formed between the pushing surface 1521 of the pushing block 152 and the plate surface of the push plate 151. Among them, the first preset angle is greater than the second preset angle. For example, the first preset angle can be 90 degrees, and the second preset angle can be 0 degrees.

[0123] To realize the movable arrangement of the push plate 151, the pushing component 150 further includes a support plate 153. The push plate 151 is telescopically arranged on the support plate 153 so that the push plate 151 can perform telescopic movement relative to the support plate 153. The telescopic direction of the push plate 151 is the above-mentioned preset moving direction.

[0124] The pushing block 152 is rotatably arranged on the push plate 151 through a rotating shaft 154 so that the pushing block 152 can be turned relative to the push plate 151. A torsion spring 155 is sleeved on the rotating shaft 154 so that the pushing block 152 is maintained in the pushing state for pushing the push rod 143.

[0125] The pushing component 150 further includes a slider 156. The slider 156 is movably arranged on the support plate 153 so that the slider 156 can move relative to the pushing block 152. The slider 156 has an inclined surface 1561 in contact with the pushing block 152. The inclined surface 1561 is inclined to the moving direction of the slider 156 so that when the pushing block 152 returns from the position separated from the inclined surface 1561 to the initial position, the pushing block 152 is pressed by the slider 156 into the folded state for avoiding the push rod 143.

[0126] During the specific implementation process, the pushing block 152 has an initial position and a predetermined moving position along the telescopic direction of the push plate 151, such as Figure 30 and Figure 31 , Figure 30 shows a schematic state diagram when the push plate 151 is in its initial position. The initial position of the pushing block 152 is the position where the pushing block 152 is located when the push plate 151 does not perform telescopic movement. Figure 31The schematic diagram of the state when the push plate 151 is at its predetermined moving position is shown. The predetermined moving position of the pushing block 152 is the position where the pushing block 152 is located when the push plate 151 moves relative to the support plate 153 to its maximum extended position.

[0127] During the extension movement of the push plate 151 relative to the support plate 153, the pushing block 152 moves from its initial position to its predetermined moving position. During this movement, a first preset angle is formed between the pushing surface 1521 of the pushing block 152 and the plate surface of the push plate 151, so that when the pushing block 152 abuts against the push rod 143, the pushing surface 1521 of the pushing block 152 contacts the push rod 143 to push the push rod 143 to rotate; and the pushing block 152 can move in contact with the inclined surface 1561 of the slider 156 to push open the slider 156, so that the slider 156 gives way to the pushing block 152 until the pushing block 152 disengages from the slider 156. During this process, since the push rod 143 rotates, the push rod 143 in contact with the pushing block 152 gradually moves away from the pushing block 152, and the contact part between the pushing block 152 and the push rod 143 in contact with it gradually decreases. When the pushing block 152 moves to its predetermined moving position, the push rod 143 in contact with the pushing block 152 completely disengages from the pushing block 152, that is, during this process, the pushing block 152 pushes the push rod 143 to rotate the rotating disk 141 by a certain angle.

[0128] During the retraction movement of the push plate 151 relative to the support plate 153, the pushing block 152 moves from its predetermined moving position to its initial position. During this movement, when the pushing block 152 abuts against the cross section of the slider 156, due to the tendency of the pushing block 152 to continue moving towards its initial position, the slider 156 exerts a force on the pushing block 152 to press the pushing block 152 to rotate towards the direction close to the push plate 151 until the pushing surface 1521 of the pushing block 152 forms a second preset angle with the plate surface of the push plate 151, thereby making the pushing block 152 in a folded state to avoid the pushing block 152 contacting the push rod 143; during the process of the pushing block 152 continuing to move towards its initial position, due to the elastic action of the torsion spring 155, the pushing block 152 will rotate away from the push plate 151, but under the blocking action of the plate surface of the slider 156 facing the push plate 151, it can be kept that the pushing block 152 is difficult to return to its pushing position, which can prevent the pushing block 152 from driving the push rod 143 to rotate back; the pushing position of the pushing block 152 mentioned here refers to its position relative to the push plate 151 when it is in the pushing state.

[0129] After the pushing block 152 returns to its initial position, under the elastic action of the torsion spring 155, and the slider 156 no longer stops the pushing block 152, the pushing block 152 returns to its pushing position. At this time, the pushing surface 1521 of the pushing block 152 contacts the next push rod 143. When the push plate 151 performs an extending movement again, the pushing block 152 continues to push this push rod 143 to rotate, so as to drive the rotating disk 141 to rotate. Among them, the above-mentioned "next push rod 143" refers to the push rod 143 adjacent to the push rod 143 previously pushed by the pushing block 152 in the direction opposite to the rotation direction of the rotating disk 141.

[0130] Specifically, the pushing assembly 150 further includes a first elastic member 1571. One end of the first elastic member 1571 is connected to the support plate 153 to make the first elastic member 1571 relatively fixed to the support plate 153; the other end of the first elastic member 1571 is connected to the slider 156 to make the first elastic member 1571 relatively fixed to the slider 156; thus, the slider 156 moves under the elastic action of the first elastic member 1571. Optionally, the first elastic member 1571 is a spring.

[0131] In the specific implementation process, the slider 156 has an original position relative to the pushing block 152. When the pushing block 152 pushes the slider 156 away, the first elastic member 1571 is compressed. When the pushing block 152 disengages from the slider 156, the slider 156 returns to its original position under the elastic action of the first elastic member 1571.

[0132] Specifically, the pushing assembly 150 further includes a driving member 158. The driving member 158 is connected to the push plate 151 to drive the push plate 151 to perform telescopic movement. Optionally, the driving member 158 is a driving cylinder or a linear motor.

[0133] Specifically, the pushing assembly 150 further includes a second elastic member 1572. One end of the second elastic member 1572 is connected to the support plate 153 to make the second elastic member 1572 relatively fixed to the support plate 153; the other end of the second elastic member 1572 is connected to the push plate 151 to make the second elastic member 1572 relatively fixed to the push plate 151; when the push plate 151 moves relative to the support plate 153, the second elastic member 1572 is compressed or stretched; when the push plate 151 is in its predetermined moving position, the second elastic member 1572 is in a compressed state. Optionally, the second elastic member 1572 is a spring.

[0134] In this embodiment, another implementation manner of the pushing assembly 150 is: as Figure 32As shown in the figure, the pushing component 150 includes a pushing plate 151 and a pushing block 152 for pushing the push rod 143 to rotate. The pushing block 152 is arranged on the pushing plate 151. The pushing plate 151 is movably arranged along a preset direction, so as to drive the pushing block 152 to move when the pushing plate 151 moves along the preset direction, and push the push rod 143 to rotate by the movement of the pushing block 152.

[0135] Specifically, the pushing block 152 is fixedly connected to the pushing plate 151, so that the pushing plate 151 can drive the pushing block 152 to move.

[0136] In this embodiment, another implementation manner of the pushing component 150 is as follows: As Figure 33 shown in the figure, the pushing component 150 includes a driving motor 1591 and a transmission gear 1592. The transmission gear 1592 is arranged on the output shaft of the driving motor 1591, so that the driving motor 1591 drives the transmission gear 1592 to rotate; during the rotation of the transmission gear 1592, the tooth portion of the transmission gear 1592 pushes the push rod 143 to rotate.

[0137] This embodiment also provides a pressure cooker, which includes an exhaust pipe 104 and the above-mentioned pressure limiting structure 101. The pressure limiting structure 101 is arranged on the exhaust pipe 104.

[0138] Embodiment 2

[0139] The weight hammer assembly of the pressure limiting structure 102 provided in this embodiment is composed of a first weight hammer 131, a second weight hammer 132 and a third weight hammer 133, constituting a three-stage pressure limit. The differences between the pressure limiting structure 102 in Embodiment 2 and the pressure limiting structure 101 in Embodiment 1 are as follows:

[0140] Please refer to Figures 8 to 16 . The secondary weight hammer assembly of the pressure limiting structure 102 further includes a third weight hammer 133. At least part of the second weight hammer 132 is arranged above the third weight hammer 133; a third positioning block 1423 is arranged on the disk surface of the rotating disk 141. The third positioning block 1423 is arranged inside the first positioning block 1421; a third positioning groove 1353 for avoiding the third positioning block 1423 is arranged on the third weight hammer 133, and the third positioning groove 1353 extends along the circumferential direction of the third weight hammer 133.

[0141] During the specific implementation process, the third weight hammer 133 has a second initial state in which its gravity is pressed on the first weight hammer 131 and a second lifting state in which its gravity is separated from the first weight hammer 131; when the third weight hammer 133 is in the second initial state, the third positioning block 1423 is located in the third positioning groove 1353; when the third weight hammer 133 is in the second lifting state, at least part of the third positioning block 1423 moves out of the third positioning groove 1353 to lift the third weight hammer 133.

[0142] Specifically, a fourth positioning groove 1354 is further provided on the second hammer 132. The depth of the fourth positioning groove 1354 is less than that of the first positioning groove 1351. The first positioning groove 1351, the second positioning groove 1352, and the fourth positioning groove 1354 are arranged at intervals along the circumferential direction of the second hammer 132.

[0143] During the specific implementation process, the rotating disk 141 has a first working position, a second working position, and a third working position arranged in sequence. When the rotating disk 141 rotates between the first working position and the second working position, the third positioning block 1423 is located in the third positioning groove 1353. When the rotating disk 141 moves to the third working position, at least part of the third positioning block 1423 moves out of the third positioning groove 1353 to lift the third hammer 133.

[0144] When the rotating disk 141 is in the first working position, the first positioning block 1421 is located in the first positioning groove 1351, and the second positioning block 1422 is located in the second positioning groove 1352. When the rotating disk 141 is in the second working position, the first positioning block 1421 is located in the second positioning groove 1352 to lift the second hammer 132. When the rotating disk 141 is in the third working position, the first positioning block 1421 is located in the fourth positioning groove 1354 to maintain the lifted state of the second hammer 132.

[0145] Specifically, a fourth positioning block 1424 is provided on the disk surface of the rotating disk 141. The fourth positioning groove 1354 is matched with the fourth positioning block 1424. The height of the first positioning block 1421 is greater than that of the fourth positioning block 1424. Optionally, the height of the fourth positioning block 1424 is the same as that of the second positioning block 1422.

[0146] When the rotating disk 141 is in the first working position, the fourth positioning block 1424 is located in the fourth positioning groove 1354.

[0147] In this embodiment, the second hammer 132 is sleeved on the third hammer 133. A first limiting protrusion 1331 is provided on the third hammer 133, and a first limiting groove 1321 matched with the first limiting protrusion 1331 is provided on the inner wall of the second hammer 132. The second hammer 132 and the third hammer 133 are relatively fixed by inserting the first limiting protrusion 1331 into the first limiting groove 1321.

[0148] Optionally, the outer peripheral surface of the first limiting protrusion 1331 and the inner peripheral surface of the first limiting groove 1321 are both polygonal to ensure the limiting effect between the second hammer 132 and the third hammer 133.

[0149] In this embodiment, the pressing column 136 is provided on the third hammer 133; the rotating disk 141 is rotatably sleeved on the pressing column 136, that is, the rotating disk 141 is sleeved outside the third hammer 133, so that the rotating disk 141 can rotate relative to the third hammer 133 and the second hammer 132.

[0150] A second positioning groove group is provided on the second hammer 132. The second positioning groove group includes a first positioning groove 1351, a second positioning groove 1352, and a fourth positioning groove 1354 that are sequentially arranged at intervals along the circumferential direction of the second hammer 132; a second positioning block group is provided on the rotating disk 141. The second positioning block group includes a first positioning block 1421, a second positioning block 1422, and a fourth positioning block 1424 that are sequentially arranged at intervals along the circumferential direction of the rotating disk 141.

[0151] Optionally, a plurality of second positioning groove groups are provided on the second hammer 132, and the plurality of second positioning groove groups are arranged at intervals along the circumferential direction of the second hammer 132; a group of second positioning block groups and a third positioning block 1423 are provided on the rotating disk 141; a plurality of third positioning grooves 1353 are provided on the third hammer 133, and the plurality of third positioning grooves 1353 are arranged at intervals along the circumferential direction of the third hammer 133.

[0152] When the rotating disk 141 is in the first working position, the first positioning block 1421 is located in the first positioning groove 1351 of one of the plurality of second positioning groove groups, the second positioning block 1422 is located in the second positioning groove 1352 of the second positioning groove group, the fourth positioning block 1424 is located in the fourth positioning groove 1354 of the second positioning groove group, and the third positioning block 1423 is located in one of the plurality of third positioning grooves 1353, so that the third hammer 133 is in its second initial state.

[0153] During the rotation of the rotating disk 141 relative to the second weight 132 and the third weight 133, the first positioning block 1421, the second positioning block 1422, the third positioning block 1423 and the fourth positioning block 1424 all rotate with the rotating disk 141; when the rotating disk 141 rotates relative to the second weight 132 and the third weight 133 and rotates to its second working position, the first positioning block 1421 moves into the second positioning groove 1352 of the second positioning groove group, and the first positioning block 1421 is inserted into the second positioning groove 1352 to lift the second weight 132, so that the second weight 132 is in a lifted state; the second positioning block 1422 moves to the fourth positioning groove 1354 of the second positioning groove group and at least part of it is inserted into the fourth positioning groove 1354, and the fourth positioning block 1424 moves to the first positioning groove 1351 of the second positioning groove group adjacent to the second positioning groove group and at least part of it is inserted into this first positioning groove 1351; during this rotation process, the third positioning block 1423 moves within the third positioning groove 1353 where it is located and remains within the third positioning groove 1353, so as to maintain the second initial state of the third weight 133.

[0154] When the rotating disk 141 rotates relative to the second weight 132 and the third weight 133 and rotates from its second working position to its third working position, the first positioning block 1421 moves into the fourth positioning groove 1354 of the second positioning groove group, and the first positioning block 1421 is inserted into the fourth positioning groove 1354 to maintain its lifted state of the second weight 132, the second positioning block 1422 moves to the first positioning groove 1351 of the second positioning groove group adjacent to the second positioning groove group and at least part of it is inserted into this first positioning groove 1351, and the fourth positioning block 1424 moves to the second positioning groove 1352 of the second positioning groove group adjacent to the second positioning groove group and at least part of it is inserted into this second positioning groove 1352. During this rotation process, at least part of the third positioning block 1423 moves out of the third positioning groove 1353 where it is located so that the third positioning block 1423 is located outside the third positioning groove 1353 and contacts the bottom wall of the third weight 133 to lift the third weight 133, so that the third weight 133 is in its second lifted state.

[0155] Continue to rotate the rotating disk 141 to move the first positioning block 1421 into the first positioning groove 1351 of the second positioning groove group adjacent to the second positioning groove group and insert it into this first positioning groove 1351, so as to restore the second weight 132 to its initial state. At this time, the second positioning block 1422 moves into the second positioning groove 1352 of the second positioning groove group adjacent to the second positioning groove group and is inserted into this second positioning groove 1352, and the fourth positioning block 1424 moves into the fourth positioning groove 1354 of the second positioning groove group adjacent to the second positioning groove group and is inserted into this fourth positioning groove 1354; the third positioning block 1423 moves into the third positioning groove 1353 adjacent to the third positioning groove 1353 and is inserted into this adjacent third positioning groove 1353, so as to restore the third weight 133 to its second initial state.

[0156] Optionally, a plurality of second positioning groove groups are provided on the second weight 132, and the plurality of second positioning groove groups are arranged at intervals along the circumferential direction of the second weight 132; a plurality of second positioning block groups and a plurality of third positioning blocks 1423 are provided on the rotating disk 141, and the plurality of third positioning blocks 1423 are correspondingly arranged inside the first positioning blocks 1421 of the plurality of second positioning block groups; the plurality of second positioning block groups and the plurality of second positioning groove groups are correspondingly arranged, and the first positioning block 1421, the second positioning block 1422, and the fourth positioning block 1424 in each second positioning block group are correspondingly inserted into the first positioning groove 1351, the second positioning groove 1352, and the fourth positioning groove 1354 of the corresponding second positioning groove group; a plurality of third positioning grooves 1353 are provided on the third weight 133, the plurality of third positioning grooves 1353 are arranged at intervals along the circumferential direction of the third weight 133, and the plurality of third positioning blocks 1423 are correspondingly inserted into the plurality of third positioning grooves 1353.

[0157] When the rotating disk 141 is in the first working position, each first positioning block 1421 is located in the first positioning groove 1351 of the corresponding second positioning groove group, each second positioning block 1422 is located in the second positioning groove 1352 of the corresponding second positioning groove group, each fourth positioning block 1424 is located in the fourth positioning groove 1354 of the corresponding second positioning groove group, and each third positioning block 1423 is located in the corresponding third positioning groove 1353, so that the third weight 133 is in its second initial state.

[0158] When the rotating disk 141 rotates to its second working position, each first positioning block 1421 moves into the second positioning slot 1352 of its corresponding second positioning slot group to lift the second weight 132, so that the second weight 132 is in a lifted state; each second positioning block 1422 moves into the fourth positioning slot 1354 of its corresponding second positioning slot group, and each fourth positioning block 1424 moves into the first positioning slot 1351 of the second positioning slot group adjacent to its corresponding second positioning slot group. During this rotation process, each third positioning block 1423 moves within its corresponding third positioning slot 1353 and remains within its corresponding third positioning slot 1353, so that the third weight 133 maintains its second initial state.

[0159] When the rotating disk 141 rotates to its third working position, each first positioning block 1421 moves into the fourth positioning slot 1354 of its corresponding second positioning slot group to maintain the lifted state of the second weight 132. Each second positioning block 1422 moves into the first positioning slot 1351 of the second positioning slot group adjacent to its corresponding second positioning slot group, and each fourth positioning block 1424 moves into the second positioning slot 1352 of the second positioning slot group adjacent to its corresponding second positioning slot group. During this rotation process, at least a part of each third positioning block 1423 moves out of its corresponding third positioning slot 1353, so that each third positioning block 1423 is located outside its corresponding third positioning slot 1353 and contacts the bottom wall of the third weight 133 to lift the third weight 133, so that the third weight 133 is in its second lifted state.

[0160] Continue to rotate the rotating disk 141 so that each first positioning block 1421 moves into the first positioning slot 1351 of the second positioning slot group adjacent to its corresponding second positioning slot group to restore the second weight 132 to its initial state. At this time, the second positioning block 1422 moves into the second positioning slot 1352 of the second positioning slot group adjacent to its corresponding second positioning slot group, and the fourth positioning block 1424 moves into the fourth positioning slot 1354 of the second positioning slot group adjacent to its corresponding second positioning slot group; each third positioning block 1423 moves into the third positioning slot 1353 adjacent to its corresponding third positioning slot 1353, so that the third weight 133 restores its second initial state.

[0161] In this embodiment, the first positioning block 1421, the second positioning block 1422, the third positioning block 1423, and the fourth positioning block 1424 are all conical structures. Along the direction away from the rotating disk 141, the cross-sectional areas of the first positioning block 1421, the second positioning block 1422, the third positioning block 1423, and the fourth positioning block 1424 gradually decrease, so as to facilitate the first positioning block 1421, the second positioning block 1422, the third positioning block 1423, and the fourth positioning block 1424 to move out of the first positioning groove 1351, the second positioning groove 1352, the third positioning groove 1353, and the fourth positioning groove 1354 respectively; wherein, the cross-sectional areas of the first positioning block 1421, the second positioning block 1422, the third positioning block 1423, and the fourth positioning block 1424 all refer to the areas of the cross-sections perpendicular to the central direction of the rotating disk 141.

[0162] Using the pressure limiting structure 102 in this embodiment, three-stage pressure limiting can be achieved.

[0163] This embodiment also provides a pressure cooker, which includes an exhaust pipe 104 and the above-mentioned pressure limiting structure 102, and the pressure limiting structure 102 is arranged on the exhaust pipe 104.

[0164] Embodiment III

[0165] The weight hammer assembly of the pressure limiting structure 103 provided in this embodiment is composed of a first weight hammer 131, a second weight hammer 132, a third weight hammer 133, and a fourth weight hammer 134, constituting four-stage pressure limiting. The differences between the pressure limiting structure 103 in Embodiment III and the pressure limiting structure 102 in Embodiment II are as follows:

[0166] Please refer to Figures 17 to 27 , the secondary weight hammer assembly of the pressure limiting structure 103 further includes a fourth weight hammer 134, and the second weight hammer 132, the third weight hammer 133, and the fourth weight hammer 134 are arranged in sequence along the direction close to the first weight hammer 131.

[0167] Specifically, a fifth positioning block 1425 is further arranged on the disk surface of the rotating disk 141, and the fifth positioning block 1425 is located inside the third positioning block 1423; a fifth positioning groove 1355 for avoiding the fifth positioning block 1425 is arranged on the fourth weight hammer 134, and the fifth positioning groove 1355 extends along the circumferential direction of the fourth weight hammer 134.

[0168] In the specific implementation process, the fourth weight hammer 134 has a third initial state in which its gravity is pressed on the first weight hammer 131 and a third lifting state in which its gravity is separated from the first weight hammer 131; when the fourth weight hammer 134 is in the third initial state, the fifth positioning block 1425 is located in the fifth positioning groove 1355; when the fourth weight hammer 134 is in the third lifting state, at least part of the fifth positioning block 1425 moves out of the fifth positioning groove 1355 to lift the fourth weight hammer 134.

[0169] Specifically, a sixth positioning groove 1356 is further provided on the second hammer 132, and the depth of the sixth positioning groove 1356 is less than that of the first positioning groove 1351; the rotating disk 141 has a first working position, a second working position, a third working position, and a fourth working position arranged in sequence; when the rotating disk 141 rotates between the first working position and the second working position, the third positioning block 1423 is located in the third positioning groove 1353; when the rotating disk 141 moves between the first working position and the third working position, the fifth positioning block 1425 is located in the fifth positioning groove 1355.

[0170] When the rotating disk 141 is in the first working position, the first positioning block 1421 is located in the first positioning groove 1351, the second positioning block 1422 is located in the second positioning groove 1352, the third positioning block 1423 is located in the third positioning groove 1353, and the fifth positioning block 1425 is located in the fifth positioning groove 1355; when the rotating disk 141 is in the second working position, the first positioning block 1421 moves into the second positioning groove 1352 to lift the second hammer 132; when the rotating disk 141 is in the third working position, the first positioning block 1421 moves into the fourth positioning groove 1354 to continue lifting the second hammer 132, and at least a part of the third positioning block 1423 moves out of the third positioning groove 1353 to lift the third hammer 133; when the rotating disk 141 rotates to the fourth working position, the first positioning block 1421 moves into the sixth positioning groove 1356 to continue lifting the second hammer 132, the third positioning block 1423 is located outside the third positioning groove 1353 to continue lifting the third hammer 133, and at least a part of the fifth positioning block 1425 moves out of the fifth positioning groove 1355 to lift the fourth hammer 134.

[0171] In this embodiment, a sixth positioning block 1426 is further provided on the disk surface of the rotating disk 141, and the height of the sixth positioning block 1426 is less than that of the first positioning block 1421. The first positioning block 1421, the second positioning block 1422, the fourth positioning block 1424, and the sixth positioning block 1426 are arranged at intervals in sequence along the circumferential direction of the rotating disk 141; the sixth positioning groove 1356 is adapted to the sixth positioning block 1426; when the rotating disk 141 is in the first working position, the fourth positioning block 1424 is located in the fourth positioning groove 1354, and the sixth positioning block 1426 is located in the sixth positioning groove 1356.

[0172] In this embodiment, the third hammer 133 is sleeved on the fourth hammer 134. A second limiting protrusion 1332 is provided on the third hammer 133, and a second limiting groove 1341 adapted to the second limiting protrusion 1332 is provided on the outer wall of the fourth hammer 134, so that the third hammer 133 and the fourth hammer 134 are relatively fixed by inserting the second limiting protrusion 1332 into the second limiting groove 1341.

[0173] Optionally, the outer peripheral surface of the second limiting protrusion 1332 and the inner peripheral surface of the second limiting groove 1341 are both polygonal to ensure the limiting effect between the third weight 133 and the fourth weight 134.

[0174] In this embodiment, the pressing column 136 is arranged on the fourth weight 134; the rotating disk 141 is rotatably sleeved on the pressing column 136, that is, the rotating disk 141 is sleeved outside the fourth weight 134, so that the rotating disk 141 can rotate relative to the fourth weight 134, the third weight 133 and the second weight 132.

[0175] A third positioning groove group is arranged on the second weight 132. The third positioning groove group includes a first positioning groove 1351, a second positioning groove 1352, a fourth positioning groove 1354 and a sixth positioning groove 1356 that are sequentially arranged at intervals along the circumferential direction of the second weight 132; a third positioning block group is arranged on the rotating disk 141. The third positioning block group includes a first positioning block 1421, a second positioning block 1422, a fourth positioning block 1424 and a sixth positioning block 1426 that are sequentially arranged at intervals along the circumferential direction of the rotating disk 141.

[0176] Optionally, a plurality of third positioning groove groups are arranged on the second weight 132, and the plurality of third positioning groove groups are arranged at intervals along the circumferential direction of the second weight 132; a set of third positioning block groups, a third positioning block 1423 and a fifth positioning block 1425 are arranged on the rotating disk 141; a plurality of third positioning grooves 1353 are arranged on the third weight 133, and the plurality of third positioning grooves 1353 are arranged at intervals along the circumferential direction of the third weight 133; a plurality of fifth positioning grooves 1355 are arranged on the fourth weight 134, and the plurality of fifth positioning grooves 1355 are arranged at intervals along the circumferential direction of the fourth weight 134.

[0177] When the rotating disk 141 is in the first working position, the first positioning block 1421 is located in the first positioning groove 1351 of one of the plurality of third positioning groove groups, the second positioning block 1422 is located in the second positioning groove 1352 of the third positioning groove group, the fourth positioning block 1424 is located in the fourth positioning groove 1354 of the third positioning groove group, and the sixth positioning block 1426 is located in the sixth positioning groove 1356 of the third positioning groove group; the third positioning block 1423 is located in one of the plurality of third positioning grooves 1353; the fifth positioning block 1425 is located in one of the plurality of fifth positioning grooves 1355, so that the fourth weight 134 is in its third initial state.

[0178] During the rotation of the rotating disk 141 relative to the second weight 132, the third weight 133, and the fourth weight 134, the first positioning block 1421, the second positioning block 1422, the third positioning block 1423, the fourth positioning block 1424, the fifth positioning block 1425, and the sixth positioning block 1426 all rotate with the rotating disk 141; when the rotating disk 141 rotates relative to the second weight 132, the third weight 133, and the fourth weight 134 and rotates to its second working position, the first positioning block 1421 moves into the second positioning groove 1352 of the third positioning groove group, and the first positioning block 1421 is inserted into the second positioning groove 1352 to lift the second weight 132, so that the second weight 132 is in a lifted state; the second positioning block 1422 moves to the fourth positioning groove 1354 of the third positioning groove group and at least part of it is inserted into the fourth positioning groove 1354, the fourth positioning block 1424 moves to the sixth positioning groove 1356 of the third positioning groove group and at least part of it is inserted into the sixth positioning groove 1356, and the sixth positioning block 1426 moves to the first positioning groove 1351 of the third positioning groove group adjacent to the third positioning groove group and at least part of it is inserted into this first positioning groove 1351; during this rotation process, the third positioning block 1423 moves within the third positioning groove 1353 where it is located and remains within the third positioning groove 1353; the fifth positioning block 1425 moves within the fifth positioning groove 1355 where it is located and remains within the fifth positioning groove 1355 to keep the fourth weight 134 in its third initial state.

[0179] When the rotating disk 141 rotates relative to the second weight 132, the third weight 133, and the fourth weight 134 and rotates from its second working position to its third working position, the first positioning block 1421 moves into the fourth positioning groove 1354 of the third positioning groove group, and the first positioning block 1421 is inserted into the fourth positioning groove 1354 to maintain its lifted state of the second weight 132. The second positioning block 1422 moves to the sixth positioning groove 1356 of the third positioning groove group and at least partially inserts it into the sixth positioning groove 1356. The fourth positioning block 1424 moves to the first positioning groove 1351 of the third positioning groove group adjacent to the third positioning groove group and at least partially inserts it into the first positioning groove 1351. The sixth positioning block 1426 moves to the second positioning groove 1352 of the third positioning groove group adjacent to the third positioning groove group and at least partially inserts it into the second positioning groove 1352. During this rotation process, at least a part of the third positioning block 1423 moves out of the third positioning groove 1353 where it is located so that the third positioning block 1423 is located outside the third positioning groove 1353 and contacts the bottom wall of the third weight 133 to lift the third weight 133 and make the third weight 133 in its lifted state. The fifth positioning block 1425 continues to move in the fifth positioning groove 1355 where it is located and continues to be maintained in the fifth positioning groove 1355 so that the fourth weight 134 maintains its third initial state.

[0180] When the rotating disk 141 rotates relative to the second weight 132, the third weight 133, and the fourth weight 134 and rotates from its third working position to its fourth working position, the first positioning block 1421 moves into the sixth positioning groove 1356 of the third positioning groove group and is inserted into the sixth positioning groove 1356 to continue to maintain its lifted state of the second weight 132. The second positioning block 1422 moves to the first positioning groove 1351 of the third positioning groove group adjacent to the third positioning groove group and at least partially inserts it into the first positioning groove 1351. The fourth positioning block 1424 moves to the second positioning groove 1352 of the third positioning groove group adjacent to the third positioning groove group and at least partially inserts it into the second positioning groove 1352. The sixth positioning block 1426 moves to the fourth positioning groove 1354 of the third positioning groove group adjacent to the third positioning groove group and at least partially inserts it into the fourth positioning groove 1354. During this rotation process, the third positioning block 1423 continues to be located outside the third positioning groove 1353 and remains in contact with the bottom wall of the third weight 133 so that the third weight 133 maintains its lifted state. At least a part of the fifth positioning block 1425 moves out of the fifth positioning groove 1355 where it is located so that the fifth positioning block 1425 is located outside the fifth positioning groove 1355 and contacts the bottom wall of the fourth weight 134 to lift the fourth weight 134 and make the fourth weight 134 in its third lifted state.

[0181] Continue to rotate the rotating disk 141 so that the first positioning block 1421 moves into the first positioning groove 1351 of the third positioning groove group adjacent to this third positioning groove group and is inserted into this first positioning groove 1351, so that the second weight 132 returns to its initial state. At this time, the second positioning block 1422 moves into the second positioning groove 1352 of the third positioning groove group adjacent to this third positioning groove group and is inserted into this second positioning groove 1352, the fourth positioning block 1424 moves into the fourth positioning groove 1354 of the third positioning groove group adjacent to this third positioning groove group and is inserted into this fourth positioning groove 1354, and the sixth positioning block 1426 moves into the sixth positioning groove 1356 of the third positioning groove group adjacent to this third positioning groove group and is inserted into this sixth positioning groove 1356; the third positioning block 1423 moves into the third positioning groove 1353 adjacent to this third positioning groove 1353 and is inserted into this adjacent third positioning groove 1353, so that the third weight 133 returns to its initial state; the fifth positioning block 1425 moves into the fifth positioning groove 1355 adjacent to this fifth positioning groove 1355 and is inserted into this adjacent fifth positioning groove 1355, so that the fourth weight 134 returns to its third initial state.

[0182] Optionally, a plurality of third positioning groove groups are provided on the second weight 132, and the plurality of third positioning groove groups are arranged at intervals along the circumferential direction of the second weight 132; a plurality of third positioning block groups, a plurality of third positioning blocks 1423 and a plurality of fifth positioning blocks 1425 are provided on the rotating disk 141, and the plurality of third positioning blocks 1423 are correspondingly arranged inside the first positioning block 1421 of the plurality of third positioning block groups; the plurality of fifth positioning blocks 1425 are correspondingly arranged inside the plurality of third positioning blocks 1423; the plurality of third positioning block groups are correspondingly arranged with the plurality of third positioning groove groups, and the first positioning block 1421, the second positioning block 1422, the fourth positioning block 1424, and the sixth positioning block 1426 in each third positioning block group are correspondingly inserted into the first positioning groove 1351, the second positioning groove 1352, the fourth positioning groove 1354, and the sixth positioning groove 1356 of the corresponding third positioning groove group; a plurality of third positioning grooves 1353 are provided on the third weight 133, and the plurality of third positioning grooves 1353 are arranged at intervals along the circumferential direction of the third weight 133, and the plurality of third positioning blocks 1423 are correspondingly inserted into the plurality of third positioning grooves 1353.

[0183] Preferably, a plurality of fifth positioning grooves 1355 are provided on the fourth weight 134, the plurality of fifth positioning grooves 1355 are arranged at intervals along the circumferential direction of the fourth weight 134, and the plurality of fifth positioning blocks 1425 are correspondingly inserted into the plurality of fifth positioning grooves 1355.

[0184] When the rotary disk 141 is in the first working position, each first positioning block 1421 is located in the first positioning groove 1351 of the corresponding third positioning groove group, each second positioning block 1422 is located in the second positioning groove 1352 of the corresponding third positioning groove group, each fourth positioning block 1424 is located in the fourth positioning groove 1354 of the corresponding third positioning groove group, and each sixth positioning block 1426 is located in the sixth positioning groove 1356 of the corresponding third positioning groove group; each third positioning block 1423 is located in the corresponding third positioning groove 1353; each fifth positioning block 1425 is located in the corresponding fifth positioning groove 1355, so that the fourth weight 134 is in its third initial state.

[0185] When the rotary disk 141 rotates to its second working position, each first positioning block 1421 moves into the second positioning groove 1352 of its corresponding third positioning groove group to lift the second weight 132, so that the second weight 132 is in a lifted state; each second positioning block 1422 moves into the fourth positioning groove 1354 of its corresponding third positioning groove group, each fourth positioning block 1424 moves into the sixth positioning groove 1356 of its corresponding third positioning groove group, and each sixth positioning block 1426 moves into the first positioning groove 1351 of the third positioning groove group adjacent to its corresponding third positioning groove group; during this rotation process, each third positioning block 1423 moves within the third positioning groove 1353 where it is located and remains within its corresponding third positioning groove 1353; each fifth positioning block 1425 moves within the fifth positioning groove 1355 where it is located and remains within its corresponding fifth positioning groove 1355, so that the fourth weight 134 maintains its third initial state.

[0186] When the rotary disk 141 rotates from its second working position to its third working position, each first positioning block 1421 moves into the fourth positioning groove 1354 of its corresponding third positioning groove group to maintain the lifted state of the second weight 132, each second positioning block 1422 moves into the sixth positioning groove 1356 of its corresponding third positioning groove group, each fourth positioning block 1424 moves into the first positioning groove 1351 of the third positioning groove group adjacent to its corresponding third positioning groove group, and each sixth positioning block 1426 moves into the second positioning groove 1352 of the third positioning groove group adjacent to its corresponding third positioning groove group; during this rotation process, at least part of each third positioning block 1423 moves out of the third positioning groove 1353 where it is located so that each third positioning block 1423 is located outside the corresponding third positioning groove 1353 and contacts the bottom wall of the third weight 133 to lift the third weight 133, so that the third weight 133 is in its lifted state; each fifth positioning block 1425 continues to move within the fifth positioning groove 1355 where it is located and continues to remain within its corresponding fifth positioning groove 1355, so that the fourth weight 134 maintains its third initial state.

[0187] When the rotating disk 141 rotates from its third working position to its fourth working position, each first positioning block 1421 moves into the sixth positioning slot 1356 of its corresponding third positioning slot group, so that the second weight 132 continues to maintain its lifted state. Each second positioning block 1422 moves into the first positioning slot 1351 of the third positioning slot group adjacent to its corresponding third positioning slot group. Each fourth positioning block 1424 moves into the second positioning slot 1352 of the third positioning slot group adjacent to its corresponding third positioning slot group. Each sixth positioning block 1426 moves into the fourth positioning slot 1354 of the third positioning slot group adjacent to its corresponding third positioning slot group. During this rotation process, each third positioning block 1423 continues to be located outside its corresponding third positioning slot 1353 and remains in contact with the bottom wall of the third weight 133, so that the third weight 133 maintains its lifted state. At least a part of each fifth positioning block 1425 moves out of its corresponding fifth positioning slot 1355, so that each fifth positioning block 1425 is located outside its corresponding fifth positioning slot 1355 and contacts the bottom wall of the fourth weight 134 to lift the fourth weight 134 to its third lifted state.

[0188] Continue to rotate the rotating disk 141, so that each first positioning block 1421 moves into the first positioning slot 1351 of the third positioning slot group adjacent to its corresponding third positioning slot group, so that the second weight 132 returns to its initial state. At this time, each second positioning block 1422 moves into the second positioning slot 1352 of the third positioning slot group adjacent to its corresponding third positioning slot group. Each fourth positioning block 1424 moves into the fourth positioning slot 1354 of the third positioning slot group adjacent to its corresponding third positioning slot group. Each sixth positioning block 1426 moves into the sixth positioning slot 1356 of the third positioning slot group adjacent to its corresponding third positioning slot group. Each third positioning block 1423 moves into the third positioning slot 1353 adjacent to its corresponding third positioning slot 1353, so that the third weight 133 returns to its initial state. Each fifth positioning block 1425 moves into the fifth positioning slot 1355 adjacent to its corresponding fifth positioning slot 1355, so that the fourth weight 134 returns to its third initial state.

[0189] In this embodiment, the first positioning block 1421, the second positioning block 1422, the third positioning block 1423, the fourth positioning block 1424, the fifth positioning block 1425, and the sixth positioning block 1426 are all conical structures. Along the direction away from the rotating disk 141, the cross-sectional areas of the first positioning block 1421, the second positioning block 1422, the third positioning block 1423, the fourth positioning block 1424, the fifth positioning block 1425, and the sixth positioning block 1426 gradually decrease, so as to facilitate the first positioning block 1421, the second positioning block 1422, the third positioning block 1423, the fourth positioning block 1424, the fifth positioning block 1425, and the sixth positioning block 1426 to move out of the first positioning groove 1351, the second positioning groove 1352, the third positioning groove 1353, the fourth positioning groove 1354, the fifth positioning groove 1355, and the sixth positioning groove 1356 respectively; wherein, the cross-sectional areas of the first positioning block 1421, the second positioning block 1422, the third positioning block 1423, the fourth positioning block 1424, the fifth positioning block 1425, and the sixth positioning block 1426 all refer to the areas of the cross-sections perpendicular to the central direction of the rotating disk 141.

[0190] By using the pressure limiting structure 103 in this embodiment, four-stage pressure limiting can be achieved.

[0191] And so on, more levels of pressure limiting can be achieved by increasing the number of weights included in the corresponding secondary weight assemblies, adding corresponding positioning blocks on the rotating disk 141, and adding corresponding positioning grooves on the second weight 132 and the added weights for cooperation.

[0192] This embodiment also provides a pressure cooker, which includes an exhaust pipe 104 and the above-mentioned pressure limiting structure 103, and the pressure limiting structure 103 is arranged on the exhaust pipe 104.

[0193] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0194] In the pressure limiting structure of the present invention, the pressure limiting structure includes a fixing plate 110, a weight assembly 130, and an adjusting member 140. The exhaust pipe 104 is arranged below the fixing plate 110. The blocking portion 1311 of the weight assembly 130 is used to be inserted into the pipe orifice of the exhaust pipe 104 to form a blocking effect on the exhaust pipe 104. At least part of the weight assembly 130 is arranged above the fixing plate 110. The weight assembly 130 includes a plurality of weights, and the plurality of weights are stacked in sequence along the direction away from the fixing plate 110 to play a pressure limiting role through the plurality of weights. The adjusting member 140 is in transmission connection with at least part of the weights among the plurality of weights, that is, through the cooperation between the adjusting member 140 and at least part of the weights among the plurality of weights, at least part of the weights among the plurality of weights can be lifted, and then the number of weights pressing on the fixing plate 110 is adjusted by lifting at least part of the weights among the plurality of weights, that is, multi-level pressure limiting is achieved by adjusting the number of weights pressing on the fixing plate 110. Applying this pressure limiting structure to a pressure cooker to limit the pressure of the pressure cooker can achieve multi-level pressure limiting of the pressure cooker, so as to achieve multi-level pressure protection and various cooking effects of the pressure cooker, thereby solving the problem that the pressure limiting method of the pressure cooker in the prior art cannot achieve multi-level pressure limiting.

[0195] The pressure cooker of the present invention includes the above-mentioned pressure limiting structure, so the pressure cooker has at least the same technical effects as the pressure limiting structure.

[0196] For the sake of convenience of description, spatial relative terms such as "above...", "above...", "on the upper surface of...", "above" and the like can be used here to describe the spatial position relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure of the device. For example, if the device in the attached drawing is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "beneath other devices or structures" afterwards. Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding explanations are made for the spatial relative descriptions used here.

[0197] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0198] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or devices.

[0199] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pressure limiting structure, characterized in that, Comprising: A fixing plate (110) below which an exhaust pipe (104) is to be arranged; A weight assembly (130) at least part of which is arranged above the fixing plate (110); the weight assembly (130) has a blocking portion (1311) for being inserted into the pipe orifice of the exhaust pipe (104); the weight assembly (130) includes a plurality of weights which are stacked in sequence along the direction away from the fixing plate (110); An adjusting member (140) which is in transmission connection with at least part of the plurality of weights to adjust the number of weights pressing on the fixing plate (110) by lifting at least part of the plurality of weights; Wherein, the weight assembly (130) includes a first weight (131) and a secondary weight assembly, the blocking portion (1311) is arranged on the first weight (131), the first weight (131) is arranged on the fixing plate (110), at least part of the secondary weight assembly is arranged above the first weight (131), the secondary weight assembly has a pressing column (136), and a pressing groove (1313) is arranged on the first weight (131), and the pressing column (136) is inserted into the pressing groove (1313).

2. The pressure limiting structure according to claim 1, characterized in that, The adjusting member (140) includes: A rotating disk (141) on which a positioning block (142) is arranged, and the weight assembly (130) has a positioning groove (135) to adjust the matching relationship between the positioning block (142) and the positioning groove (135) by rotating the rotating disk (141) so as to lift or release at least part of the plurality of weights.

3. The pressure limiting structure according to claim 2, characterized in that, There is one positioning block (142) and a plurality of positioning grooves (135), and at least two of the plurality of positioning grooves (135) have a depth difference in the vertical direction to lift the height of at least part of the plurality of weights by inserting the positioning block (142) into the corresponding positioning groove (135); or Both the positioning blocks (142) and the positioning grooves (135) are a plurality, and the plurality of positioning blocks (142) and the plurality of positioning grooves (135) are both arranged along the circumferential direction of the rotating disk (141); at least two of the plurality of positioning blocks (142) have a height difference in the vertical direction, and at least two of the plurality of positioning grooves (135) have a depth difference in the vertical direction to lift the height of at least part of the plurality of weights by inserting each positioning block (142) into the corresponding positioning groove (135).

4. The pressure limiting structure according to claim 2, characterized in that, The positioning groove (135) is a strip-shaped groove. Along the rotation direction of the rotating disk (141), the top wall of the positioning groove (135) extends gradually in the vertical direction; the positioning block (142) is inserted into the positioning groove (135) so that when the rotating disk (141) rotates, at least part of the plurality of heavy weights can be lifted or released through the cooperation between the top wall of the positioning block (142) and the top wall of the positioning groove (135).

5. The pressure limiting structure according to claim 2, characterized in that, The adjusting member (140) further includes: A push rod (143) which is arranged on the rotating disk (141) to drive the rotating disk (141) to rotate by pushing the push rod (143).

6. The pressure limiting structure according to claim 5, characterized in that, There are a plurality of the positioning blocks (142), and at least two of the plurality of positioning blocks (142) have a height difference in the vertical direction. The plurality of positioning blocks (142) are arranged at intervals along the circumferential direction of the rotating disk (141); there are a plurality of the push rods (143), and the plurality of push rods (143) are arranged at intervals along the circumferential direction of the rotating disk (141). The plurality of push rods (143) and the plurality of positioning blocks (142) are arranged in one-to-one correspondence.

7. The pressure limiting structure according to claim 1, characterized in that, The adjusting member (140) is arranged at an interval from the first heavy weight (131), and the adjusting member (140) is in limit cooperation with the heavy weights located above the first heavy weight (131).

8. The pressure limiting structure according to claim 7, characterized in that, A positioning column (1312) is arranged on the first heavy weight (131), and a positioning hole (112) is arranged on the fixing plate (110). The positioning column (1312) is inserted into the positioning hole (112).

9. The pressure limiting structure according to claim 1, characterized in that, The outer peripheral surface of the pressing column (136) is polygonal, and the pressing groove (1313) is a polygonal groove matching the outer peripheral surface of the pressing column (136).

10. The pressure limiting structure according to claim 1, characterized in that, The secondary heavy weight assembly includes a second heavy weight (132), and the pressure limiting structure further includes: A rotating disk (141) which is rotatably sleeved on the pressing column (136); a first positioning block (1421) is arranged on the disk surface of the rotating disk (141), and a first positioning groove (1351) adapted to the first positioning block (1421) is arranged on the end surface of the second heavy weight (132). Wherein, the second heavy weight (132) has a first initial state in which its gravity is pressed on the first heavy weight (131) and a first lifted state in which its gravity is separated from the first heavy weight (131); when the second heavy weight (132) is in the first initial state, the first positioning block (1421) is inserted into the first positioning groove (1351).

11. The pressure limiting structure according to claim 10, characterized in that, A second positioning block (1422) is arranged on the disk surface of the rotating disk (141), and a second positioning groove (1352) adapted to the second positioning block (1422) is arranged on the end surface of the second heavy weight (132); the height of the first positioning block (1421) is greater than the height of the second positioning block (1422). Wherein, when the second weight (132) is in the first initial state, the second positioning block (1422) is inserted into the second positioning groove (1352); when the second weight (132) is in the first lifted state, the first positioning block (1421) is inserted into the second positioning groove (1352) to lift the second weight (132).

12. The pressure limiting structure according to claim 11, characterized in that, The first positioning block (1421) and the second positioning block (1422) are arranged in pairs, and the paired first positioning block (1421) and second positioning block (1422) are arranged at intervals along the circumferential direction of the rotating disk (141).

13. The pressure limiting structure according to claim 10, characterized in that, The pressing column (136) is arranged on the second weight (132).

14. The pressure limiting structure according to claim 10, characterized in that, The secondary weight assembly includes: A third weight (133), at least part of the second weight (132) is arranged above the third weight (133); a third positioning block (1423) is arranged on the disk surface of the rotating disk (141), and the third positioning block (1423) is arranged inside the first positioning block (1421); a third positioning groove (1353) for avoiding the third positioning block (1423) is arranged on the third weight (133), and the third positioning groove (1353) extends along the circumferential direction of the third weight (133). Wherein, the third weight (133) has a second initial state in which its gravity is pressed on the first weight (131) and a second lifted state in which its gravity is separated from the first weight (131); when the third weight (133) is in the second initial state, the third positioning block (1423) is located in the third positioning groove (1353); when the third weight (133) is in the second lifted state, at least part of the third positioning block (1423) moves out of the third positioning groove (1353) to lift the third weight (133).

15. The pressure-limiting structure according to claim 14, wherein, The second weight (132) is provided with a second positioning groove (1352) and a fourth positioning groove (1354), and the depths of the second positioning groove (1352) and the fourth positioning groove (1354) are both smaller than the depth of the first positioning groove (1351). Wherein, the rotating disk (141) has a first working position, a second working position and a third working position arranged in sequence. When the rotating disk (141) rotates between the first working position and the second working position, the third positioning block (1423) is located in the third positioning groove (1353); when the rotating disk (141) moves to the third working position, at least part of the third positioning block (1423) moves out of the third positioning groove (1353) to lift the third weight (133). When the rotating disk (141) is in the first working position, the first positioning block (1421) is located within the first positioning groove (1351); when the rotating disk (141) is in the second working position, the first positioning block (1421) is located within the second positioning groove (1352) to lift the second weight (132); when the rotating disk (141) is in the third working position, the first positioning block (1421) is located within the fourth positioning groove (1354) to maintain the lifting of the second weight (132).

16. The pressure-limiting structure according to claim 15, wherein, A fourth positioning block (1424) is provided on the disk surface of the rotating disk (141), the fourth positioning groove (1354) is matched with the fourth positioning block (1424), and the height of the first positioning block (1421) is greater than the height of the fourth positioning block (1424); Wherein, when the rotating disk (141) is in the first working position, the fourth positioning block (1424) is located within the fourth positioning groove (1354).

17. The pressure-limiting structure according to claim 14, wherein, The second weight (132) is sleeved on the third weight (133), a first limiting protrusion (1331) is provided on the third weight (133), and a first limiting groove (1321) matched with the first limiting protrusion (1331) is provided on the inner wall of the second weight (132); the outer peripheral surface of the first limiting protrusion (1331) and the inner peripheral surface of the first limiting groove (1321) are both polygonal.

18. The pressure-limiting structure according to claim 14, wherein, The pressing column (136) is provided on the third weight (133).

19. The pressure-limiting structure according to claim 14, wherein, The secondary weight assembly further includes: A fourth weight (134), the second weight (132), the third weight (133) and the fourth weight (134) are arranged in sequence along the direction close to the first weight (131); A fifth positioning block (1425) is provided on the disk surface of the rotating disk (141), the fifth positioning block (1425) is located inside the third positioning block (1423); a fifth positioning groove (1355) for avoiding the fifth positioning block (1425) is provided on the fourth weight (134), and the fifth positioning groove (1355) extends along the circumferential direction of the fourth weight (134); Wherein, the fourth weight (134) has a third initial state in which its gravity is pressed on the first weight (131) and a third lifting state in which its gravity is separated from the first weight (131); when the fourth weight (134) is in the third initial state, the fifth positioning block (1425) is located within the fifth positioning groove (1355); when the fourth weight (134) is in the third lifting state, at least a part of the fifth positioning block (1425) moves out of the fifth positioning groove (1355) to lift the fourth weight (134).

20. The pressure-limiting structure according to claim 19, wherein, A second positioning groove (1352), a fourth positioning groove (1354), and a sixth positioning groove (1356) are provided on the second hammer (132). The depths of the second positioning groove (1352), the fourth positioning groove (1354), and the sixth positioning groove (1356) are all less than the depth of the first positioning groove (1351). Among them, the rotating disk (141) has a first working position, a second working position, a third working position, and a fourth working position arranged in sequence. When the rotating disk (141) rotates between the first working position and the second working position, the third positioning block (1423) is located in the third positioning groove (1353). When the rotating disk (141) moves between the first working position and the third working position, the fifth positioning block (1425) is located in the fifth positioning groove (1355). When the rotating disk (141) is in the first working position, the first positioning block (1421) is located in the first positioning groove (1351), the third positioning block (1423) is located in the third positioning groove (1353), and the fifth positioning block (1425) is located in the fifth positioning groove (1355). When the rotating disk (141) is in the second working position, the first positioning block (1421) moves into the second positioning groove (1352) to lift the second hammer (132). When the rotating disk (141) is in the third working position, the first positioning block (1421) moves into the fourth positioning groove (1354) to continue lifting the second hammer (132), and at least a part of the third positioning block (1423) moves out of the third positioning groove (1353) to lift the third hammer (133). When the rotating disk (141) rotates to the fourth working position, the first positioning block (1421) moves into the sixth positioning groove (1356) to continue lifting the second hammer (132), the third positioning block (1423) is located outside the third positioning groove (1353) to continue lifting the third hammer (133), and at least a part of the fifth positioning block (1425) moves out of the fifth positioning groove (1355) to lift the fourth hammer (134).

21. The pressure-limiting structure according to claim 20, wherein, On the disk surface of the rotating disk (141), a fourth positioning block (1424) and a sixth positioning block (1426) are provided. The heights of the fourth positioning block (1424) and the sixth positioning block (1426) are both less than that of the first positioning block (1421). The first positioning block (1421), the fourth positioning block (1424), and the sixth positioning block (1426) are sequentially arranged at intervals along the circumferential direction of the rotating disk (141). The fourth positioning groove (1354) is adapted to the fourth positioning block (1424), and the sixth positioning groove (1356) is adapted to the sixth positioning block (1426). When the rotating disk (141) is in the first working position, the fourth positioning block (1424) is located in the fourth positioning groove (1354), and the sixth positioning block (1426) is located in the sixth positioning groove (1356).

22. The pressure-limiting structure according to claim 5, wherein, The pressure limiting structure further includes: A pushing component (150), at least a part of the pushing component (150) is movably arranged to push the push rod (143) to rotate through the pushing component (150).

23. The pressure-limiting structure according to claim 22, wherein, The pushing component (150) includes: A push plate (151) and a pushing block (152) for pushing the push rod (143) to rotate. The pushing block (152) is arranged on the push plate (151). The push plate (151) is movably arranged along a preset direction to drive the push rod (143) to rotate.

24. The pressure-limiting structure according to claim 23, wherein, The pushing block (152) is fixedly connected to the push plate (151); or The pushing block (152) is flip - ably arranged on the push plate (151). The pushing block (152) has a pushing state for pushing the push rod (143) and a folded state for avoiding the push rod (143). When the pushing block (152) is in the pushing state, a first preset angle is formed between the pushing surface (1521) of the pushing block (152) in contact with the push rod (143) and the plate surface of the push plate (151). When the pushing block (152) is in the folded state, a second preset angle is formed between the pushing surface (1521) of the pushing block (152) and the plate surface of the push plate (151). Among them, the first preset angle is greater than the second preset angle.

25. The pressure-limiting structure according to claim 23, wherein, The pushing component (150) further includes: A support plate (153). The push plate (151) is telescopically arranged on the support plate (153). The pushing block (152) is rotatably arranged on the push plate (151) through a rotating shaft (154). A torsion spring (155) is sleeved on the rotating shaft (154) to keep the pushing block (152) in the pushing state for pushing the push rod (143). A slider (156), wherein the slider (156) is movably arranged on the support plate (153), and the slider (156) has an inclined surface (1561) in contact with the push block (152), and the inclined surface (1561) is inclined to the moving direction of the slider (156), so that when the push block (152) returns to the initial position from the position disengaged from the inclined surface (1561), the slider (156) presses the push block (152) to be in a folded state to avoid the push rod (143).

26. The pressure-limiting structure according to claim 22, wherein, The pushing assembly (150) comprises: Drive motor (1591); A transmission gear (1592), wherein the transmission gear (1592) is disposed on an output shaft of the driving motor (1591) so as to drive the push rod (143) to rotate through the gear teeth of the transmission gear (1592).

27. A pressure cooker, comprising an exhaust pipe (104) and a pressure limiting structure pressed on the exhaust pipe (104), characterized in that, The pressure limiting structure is the pressure limiting structure according to any one of claims 1 to 26.

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