Pressure cooking utensil

Abstract

The utility model belongs to the technical field of kitchen appliances, and discloses a pressure cooking utensil which comprises a heat preservation cover, a heating disc arranged in the heat preservation cover and an elastic piece located between the heat preservation cover and the heating disc, the elastic piece is provided with a positioning hole, the heating disc is provided with a positioning column, and the positioning column comprises a body penetrating through the positioning hole and a contact part. And when the elastic sheet is pressed to deform, the contact part is in linear contact with the elastic sheet. According to the pressure cooking utensil, uniform stress is generated when the elastic piece is stressed, the service life of the elastic piece is prolonged, the fatigue resistance of the elastic piece is guaranteed, then the service life of the pressure cooking utensil is prolonged, and the use experience of a user is improved; the deformed elastic sheet is in linear contact with the contact part, so that the contact area of the elastic sheet and the contact part is increased, the pressure between the elastic sheet and the contact part is reduced, the abrasion to the contact part is reduced, the stress position of the elastic sheet is kept unchanged, the stability of the elastic sheet is improved, and the service life of the elastic sheet is prolonged.

Description

Technical Field

[0001] The present application belongs to the technical field of kitchen appliances, and in particular relates to a pressure cooking device. Background Art

[0002] A pressure cooking device is a common kitchen appliance, which includes a pot body and a pot cover arranged on the pot body. The pot body includes a shell, a heat-insulating cover arranged in the shell, an inner pot located in the heat-insulating cover, and a heating plate arranged in the heat-insulating inner pot at the bottom of the inner pot, and the inner pot and the pot cover together form a sealed cooking cavity.

[0003] When the pressure cooking appliance is cooking, the pressure in the cooking cavity continues to increase. In order to achieve automatic power-off of the heating plate after the pressure in the cooking cavity reaches a set value, it is necessary to provide an elastic sheet between the heat-insulating cover and the heating plate, so that when the pressure in the cooking cavity increases, the inner pot applies pressure to the heating plate, so that the heating plate applies pressure to the elastic sheet and moves toward the bottom of the heat-insulating cover; when the pressure in the cooking cavity reaches a set value, the trigger portion provided on the heating plate passes through the bottom of the heat-insulating cover to trigger the trigger switch located at the bottom of the heat-insulating cover, so that the trigger switch cuts off the power to the heating plate, and the heating plate stops heating the cooking cavity.

[0004] In order to increase the stability of the elastic sheet, a positioning column is provided at the bottom of the heating plate, a contact portion is provided on the peripheral side of the positioning column, and a positioning hole adapted to the positioning column is provided on the elastic sheet. The contact portion is usually a circular cylinder, so that when the elastic sheet is deformed, there is point contact between the elastic sheet and the contact portion, thereby causing uneven stress on the elastic sheet when subjected to force. This can easily cause the elastic sheet to crack and fail after long-term use, affecting the service life of the elastic sheet; at the same time, it can easily cause wear to the contact portion, reducing the stability of the elastic sheet. Utility Model Content

[0005] The present application provides a pressure cooking device to increase the service life and stability of an elastic sheet.

[0006] The technical solution adopted in this application is:

[0007] A pressure cooking device comprises a heat-insulating cover, a heating plate arranged in the heat-insulating cover, and an elastic sheet located between the heat-insulating cover and the heating plate, wherein the elastic sheet is provided with a positioning hole, and the heating plate is provided with a positioning column, wherein the positioning column comprises a body penetrating through the positioning hole, and a contact portion, wherein when the elastic sheet is deformed under pressure, the contact portion is in linear contact with the elastic sheet.

[0008] The pressure cooking device described in this application also includes the following additional technical features:

[0009] The elastic sheet has a deformation section and support sections located at both ends of the deformation section. The contact portion is arranged corresponding to the support section, and the contact portion has a support straight edge that cooperates with the elastic sheet.

[0010] The contact portion is a square structure surrounding the body, and the top edge of the square structure corresponding to the support section constitutes the support straight edge.

[0011] The elastic sheet has a deformation section and support sections located at both ends of the deformation section. The contact portion is arranged corresponding to the support section. The contact portion has a support surface. When the elastic sheet is deformed under pressure, the support surface contacts the elastic sheet.

[0012] A gap is formed between the contact portion and the body.

[0013] A limiting portion is disposed on one side of the contact portion, and the limiting portion cooperates with the elastic sheet to limit the elastic sheet from rotating around the body.

[0014] The elastic sheet has a deformation section where the positioning hole is arranged and support sections located at two ends of the deformation section, and the limiting portion abuts against the side surface of the deformation section.

[0015] A reinforcing portion is disposed on one side of the contact portion, the reinforcing portion extends toward the limiting portion and is connected to the limiting portion, and a bottom end surface of the reinforcing portion is disposed not lower than a bottom end surface of the contact portion.

[0016] The heat preservation cover is provided with supporting bosses at intervals, and a deformation space for the elastic sheet to deform is formed between the supporting bosses. Both ends of the elastic sheet are respectively in contact with the supporting bosses, and the top of the supporting bosses has a supporting plane in contact with the elastic sheet.

[0017] A trigger switch is arranged at the bottom of the heat preservation cover, and the heating disk is provided with a trigger part passing through the heat preservation cover for triggering the trigger switch. The heating disk includes a disk body and a heating element extending circumferentially along the disk body, and the trigger part is provided with an extension part extending to the bottom of the heating element.

[0018] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0019] 1. The pressure cooking device in the present application comprises a heat preservation cover, a heating plate arranged in the heat preservation cover, and an elastic sheet located between the heat preservation cover and the heating plate, wherein the elastic sheet is provided with a positioning hole, and the heating plate is provided with a positioning column, wherein the positioning column comprises a body penetrating the positioning hole, and a contact portion, wherein when the elastic sheet is deformed under pressure, the contact portion is in line contact with the elastic sheet, and then when the heating plate moves downward, the contact portion applies pressure to the elastic sheet to cause elastic deformation of the elastic sheet, and the deformed elastic sheet is in line contact with the contact portion to increase the contact area between the elastic sheet and the contact portion, so that the elastic sheet generates uniform stress when subjected to force, so as to avoid the situation where the elastic sheet generates uneven stress, which causes the elastic sheet to crack and fail easily, thereby increasing the service life of the elastic sheet and ensuring the fatigue resistance of the elastic sheet, thereby increasing the service life of the pressure cooking device and improving the user experience; in addition, the pressure between the elastic sheet and the contact portion is reduced, the wear on the contact portion is reduced, the force position of the elastic sheet remains unchanged, and the force position of the elastic sheet is ensured to maintain a certain distance from its middle position, thereby increasing the stability and service life of the elastic sheet.

[0020] 2. As a preferred embodiment of the present application, the elastic sheet has a deformation section and support sections located at both ends of the deformation section. The contact portion is arranged corresponding to the support section. The contact portion has a support straight edge that cooperates with the elastic sheet support. When the heating plate moves downward, the contact portion applies pressure to the deformation section to cause the deformation section to undergo elastic deformation. At this time, the support straight edges located at both ends of the contact portion cooperate with the elastic sheet support to increase the contact area between the contact portion and the elastic sheet, reduce the pressure between the elastic sheet and the contact portion, reduce the wear on the contact portion, and keep the force position of the elastic sheet unchanged, so that the force position of the elastic sheet is as close to the support section as possible, thereby increasing the stability and service life of the elastic sheet.

[0021] 3. As a preferred embodiment of the present application, there is a gap between the contact portion and the main body to form an avoidance between the contact portion and the main body, thereby avoiding the situation where burrs may appear between the contact portion and the main body during molding and affect the deformation of the elastic sheet, thereby increasing the stability of the elastic sheet and ensuring the normal operation of the pressure cooking appliance; in addition, the weight of the heating plate can also be reduced to achieve the effect of reducing the weight of the heating plate, reducing the weight of the pressure cooking appliance, achieving the effect of facilitating the movement of the pressure cooking appliance, and improving the user experience.

[0022] 4. As a preferred embodiment of the present application, a limiting portion is provided on one side of the contact portion, and the limiting portion cooperates with the elastic sheet to limit the rotation of the elastic sheet around the main body. When assembling the pressure cooking appliance, the elastic sheet is first installed on the heating plate, and then the main body is passed through the positioning hole. At the same time, the limiting portion cooperates with the elastic sheet to limit the rotation of the elastic sheet around the main body, so that the elastic sheet is kept in the correct assembly position and will not rotate relative to the main body due to the movement of the heating plate, so that the elastic sheet and the edge of the insulation cover form mutual avoidance, so as to achieve the effect of facilitating the assembly of the pressure cooking appliance, greatly improving the assembly efficiency of the pressure cooking appliance; at the same time, the relative position of the elastic sheet with the main body remains unchanged when it is compressed and deformed, so as to increase the stability of the elastic sheet and ensure the normal operation of the pressure cooking appliance.

[0023] 5. As a preferred embodiment of the present application, the elastic sheet has a deformation section with a positioning hole and support sections located at both ends of the deformation section, and the limiting portion contacts the side of the deformation section, thereby reducing the matching points between the limiting portion and the elastic sheet while ensuring the limiting effect of the limiting portion on the elastic sheet, so as to achieve the effect of facilitating the assembly of the elastic sheet and improve the assembly efficiency of the elastic sheet; at the same time, the impact on the deformation of the elastic sheet is reduced to ensure the normal deformation and recovery of the elastic sheet and ensure the normal operation of the pressure cooking appliance; in addition, it can also serve as a visual reminder for the assemblers, so that the assemblers can quickly find the position to assemble the elastic sheet, further improve the assembly efficiency of the assemblers and ensure the accuracy of the assembly of the elastic sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 This is a schematic diagram of the exploded structure of the pressure cooking device according to one embodiment of the present application;

[0026] Figure 2 This is a schematic diagram of the structure of the heating plate in one embodiment of the present application;

[0027] Figure 3 This is a schematic structural diagram of the elastic sheet in one embodiment of the present application;

[0028] Figure 4 This is a schematic diagram of the explosion structure of the heating plate in one embodiment of the present application;

[0029] Figure 5 This is a schematic structural diagram of the heating plate from another perspective in one embodiment of the present application;

[0030] Figure 6 This is a schematic structural diagram of the heating plate from another perspective in one embodiment of the present application, mainly showing the positional relationship between the elastic sheet and the contact portion;

[0031] Figure 7 This is a schematic structural diagram of the heat preservation cover described in one embodiment of the present application;

[0032] Figure 8 This is a cross-sectional view of the cooking utensil in one embodiment of the present application, mainly showing the connection relationship between the elastic sheet and the supporting boss and the contact portion when the elastic sheet is not deformed;

[0033] Fig. 9 for Figure 8 A magnified view of the middle A area;

[0034] Fig.10 This is a cross-sectional view of the cooking utensil in one embodiment of the present application, mainly showing the connection relationship between the elastic sheet and the supporting boss and the contact portion when the elastic sheet is deformed;

[0035] Fig.11 for Fig.10 Enlarged view of the B area;

[0036] Fig.12 This is a cross-sectional view of the heating plate in one embodiment of the present application, mainly showing the connection relationship between the elastic sheet and the contact portion when the elastic sheet is deformed.

[0037] Reference numerals:

[0038] 1. Insulation cover; 11. Support boss; 111. Support plane; 112. Matching straight edge;

[0039] 2. Heating plate; 21. Plate body; 211. Positioning column; 212. Main body; 213. Contact part; 214. Screw; 215. Gasket; 216. Support straight edge; 217. Partition groove; 218. Trigger part; 219. Extension part; 22. Heating element; 221. Limiting part; 222. Reinforcement part;

[0040] 3. Elastic sheet; 31. Deformation section; 311. Positioning hole; 32. Support section. DETAILED DESCRIPTION

[0041] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0042] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0043] In addition, in the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0044] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] In the present application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "example", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0046] Reference Figures 1 to 12 A pressure cooking device comprises a heat preservation cover 1, a heating plate 2 arranged in the heat preservation cover 1 and an elastic sheet 3 located between the heat preservation cover 1 and the heating plate 2, wherein the elastic sheet 3 is provided with a positioning hole 311, and the heating plate 2 is provided with a positioning column 211, the positioning column 211 comprises a body 212 passing through the positioning hole 311, and a contact portion 213, when the elastic sheet 3 is deformed under pressure, the contact portion 213 is in line contact with the elastic sheet 3.

[0047] It can be understood that when the heating plate 2 moves downward, the contact portion 213 applies pressure to the elastic sheet 3 to cause the elastic sheet 3 to undergo elastic deformation. The deformed elastic sheet 3 is in line contact with the contact portion 213, thereby causing the elastic sheet 3 to generate uniform stress when subjected to force, so as to avoid the elastic sheet 3 generating uneven stress, which may cause the elastic sheet 3 to easily crack and fail, thereby increasing the service life of the elastic sheet 3 and ensuring the fatigue resistance of the elastic sheet 3, thereby increasing the service life of the pressure cooking appliance and improving the user experience; in addition, the contact area between the elastic sheet 3 and the contact portion 213 is increased, thereby reducing the pressure between the elastic sheet 3 and the contact portion 213, reducing the wear on the contact portion 213, and keeping the force position of the elastic sheet 3 unchanged, ensuring that the force position of the elastic sheet 3 maintains a certain distance from its middle position, thereby increasing the stability and service life of the elastic sheet 3.

[0048] The present application does not specifically limit the material of the elastic sheet 3. Preferably, the elastic sheet 3 is made of a metal material containing manganese to increase the hardness and elasticity of the elastic sheet 3. In other embodiments, the elastic sheet 3 can also be made of other materials as long as the elastic sheet 3 can have a certain hardness and elasticity.

[0049] In a preferred embodiment, referring to Figure 3 , Figure 4 and Figure 5 The elastic sheet 3 has a deformation section 31 and support sections 32 located at both ends of the deformation section 31, and the contact portion 213 is arranged corresponding to the support section 32. That is to say, the elastic sheet 3 has a length direction, and the elastic sheet 3 is divided into a deformation section 31 and support sections 32 located at both ends of the deformation section 31 in its own length direction. The contact portion 213 is at least located at both ends of the main body 212 in a direction parallel to the length of the elastic sheet 3.

[0050] The present application does not specifically limit the contact mode between the elastic sheet 3 and the contact portion 213 when the elastic sheet 3 is deformed under pressure, and any one of the following embodiments may be adopted:

[0051] Embodiment 1, in this embodiment, refer to Figure 2 , Figure 4 , Figure 6 and Fig.12 The contact portion 213 has a supporting straight edge 216 that supports and cooperates with the elastic sheet 3. That is, the contact portion is located at both ends of the body 212 in a direction parallel to the length of the elastic sheet 3 and is provided with a supporting straight edge 216.

[0052] When the heating plate 2 moves downward, the contact portion 213 applies pressure to the deformation segment 31 to cause the deformation segment 31 to undergo elastic deformation. At this time, the supporting straight edges 216 located at both ends of the contact portion 213 cooperate with the elastic sheet 3 to increase the contact area between the contact portion 213 and the elastic sheet 3, reduce the pressure between the elastic sheet 3 and the contact portion 213, reduce the wear on the contact portion 213, and keep the force position of the elastic sheet 3 unchanged, so that the force position of the elastic sheet 3 is as close to the supporting segment 32 as possible, thereby increasing the stability and service life of the elastic sheet 3.

[0053] In this embodiment, the shape of the contact portion 213 is not specifically limited. Preferably, refer to Figure 1 , Figure 2 , Figure 4 and Figure 6 The contact portion 213 is a square structure surrounding the body 212, and the top edge of the square structure corresponding to the support section 32 constitutes a support straight edge 216, so that when the elastic sheet 3 is compressed and deformed, the top edge of the square structure corresponding to the support section 32 cooperates with the elastic sheet 3 to increase the contact area between the elastic sheet 3 and the contact portion 213, reduce the pressure between the elastic sheet 3 and the contact portion 213, avoid wear of the contact portion 213, and increase the stability of the elastic sheet 3. In other embodiments, the contact portion 213 can also be other shapes, such as a runway circle, as long as the elastic sheet 3 can be in line contact with the contact portion 213 when it is compressed and deformed.

[0054] Embodiment 2. In this embodiment, the contact portion 213 has a supporting surface, that is, the contact portion 213 is located at both ends of the body 212 parallel to the length direction of the elastic sheet 3 and is provided with supporting surfaces. When the elastic sheet 3 is deformed under pressure, the supporting surface contacts the elastic sheet 3.

[0055] It can be understood that the side of the support surface close to the main body 212 is a straight edge, so when the heating plate 2 moves downward, the contact portion 213 applies pressure to the deformation segment 31 to cause a smaller elastic deformation of the deformation segment 31. At this time, the straight edge located on the side of the support surface close to the main body 212 contacts the elastic sheet 3, and the heating plate 2 continues to move downward. When the elastic sheet 3 continues to deform, the contact area between the support surface and the elastic sheet 3 is further increased to further increase the contact area between the contact portion 213 and the elastic sheet 3, reduce the pressure between the elastic sheet 3 and the contact portion 213, reduce the wear on the contact portion 213, and keep the force position of the elastic sheet 3 unchanged, so that the force position of the elastic sheet 3 is as close to the support segment 32 as possible, thereby increasing the stability and service life of the elastic sheet 3.

[0056] The present application does not make any specific limitation on the shape of the support surface, which may be a plane inclined upward in a direction away from the main body 212, or an arc surface with the center located above the elastic sheet 3, as long as the support surface can contact the elastic sheet 3 when the elastic sheet 3 is deformed under pressure.

[0057] In a preferred embodiment, referring to Figure 2 and Figure 4 There is a gap between the contact portion 213 and the main body 212 so that there is an avoidance between the contact portion 213 and the main body 212, avoiding the situation that burrs may appear between the contact portion 213 and the main body 212 during molding and affect the deformation of the elastic sheet 3, thereby increasing the stability of the elastic sheet 3 and ensuring the normal operation of the pressure cooking appliance; in addition, the weight of the heating plate 2 can also be reduced to reduce the weight of the heating plate 2, reduce the weight of the pressure cooking appliance, achieve the effect of facilitating the movement of the pressure cooking appliance, and improve the user experience.

[0058] The present application does not specifically limit the method for forming the gap between the contact portion 213 and the body 212. Preferably, the body 212 and the contact portion 213 are separately provided, and the body 212 and the contact portion 213 are spaced apart so that a gap is formed between the body 212 and the contact portion 213, so as to facilitate the molding of the contact portion 213 and the body 212. In other embodiments, the body 212 and the contact portion 213 may be integrally formed, and a groove may be provided between the body 212 and the contact portion 213, so that a gap is formed between the contact portion 213 and the body 212.

[0059] The present application does not specifically limit the structure of the contact portion 213. Preferably, the contact portion 213 is an annular structure surrounding the body 212 to increase the structural strength of the contact portion 213, thereby increasing the stability of the contact portion 213. In other embodiments, the contact portion 213 may also be a block structure provided at both ends of the body 212 parallel to the length direction of the elastic sheet 3 to reduce the weight of the heating plate 2.

[0060] Further, refer to Figure 2 and Figure 4 The contact portion 213 is provided with a partition groove 217, which is located on the side of the body 212 away from the center of the heating plate 2, so as to further reduce the weight of the heating plate 2, thereby facilitating the movement of the pressure cooking appliance and improving the user experience.

[0061] In a preferred embodiment, referring to Figure 2 and Figure 5 A limiting portion 221 is disposed on one side of the contact portion 213 , and the limiting portion 221 cooperates with the elastic sheet 3 to limit the elastic sheet 3 from rotating around the body 212 .

[0062] When assembling the pressure cooking appliance, the elastic sheet 3 is first installed on the heating plate 2, and then the main body 212 is passed through the positioning hole 311, and the limiting portion 221 cooperates with the elastic sheet 3 to limit the rotation of the elastic sheet 3 around the main body 212, so that the elastic sheet 3 is kept in the correct assembly position and will not rotate relative to the main body 212 due to the movement of the heating plate 2, so that the elastic sheet 3 and the edge of the heat preservation cover 1 form a mutual avoidance, so as to achieve the effect of facilitating the assembly of the pressure cooking appliance, and greatly improve the assembly efficiency of the pressure cooking appliance; at the same time, the relative position of the elastic sheet 3 with the main body 212 remains unchanged when it is compressed and deformed, so as to increase the stability of the elastic sheet 3 and ensure the normal operation of the pressure cooking appliance.

[0063] The present application does not specifically limit the number of the limiting portions 221. Preferably, refer to Figure 3 and Figure 5 The elastic sheet 3 has a deformation section 31 with a positioning hole 311 and support sections 32 located at both ends of the deformation section 31. The limiting portion 221 abuts against the side of the deformation section 31, that is, the limiting portion 221 is provided with one and is correspondingly arranged with the deformation section 31.

[0064] By setting the limiting portion 221 as one and corresponding to the deformation section 31, the matching points of the limiting portion 221 and the elastic sheet 3 are reduced while ensuring the limiting effect of the limiting portion 221 on the elastic sheet 3, so as to achieve the effect of facilitating the assembly of the elastic sheet 3 and improve the assembly efficiency of the elastic sheet 3; at the same time, the impact on the deformation of the elastic sheet 3 is reduced to ensure the normal deformation and recovery of the elastic sheet 3 and the normal operation of the pressure cooking appliance; in addition, it can also serve as a visual reminder for the assemblers, so that the assemblers can quickly find the position to assemble the elastic sheet 3, further improving the assembly efficiency of the assemblers and ensuring the accuracy of the assembly of the elastic sheet 3.

[0065] Preferably, refer to Figure 3 and Figure 5 The limiting portion 221 is located on the side of the contact portion 213 close to the center of the heating plate 2, so that the limiting portion 221 abuts against the side of the deformation section 31 close to the center of the heating plate 2, so as to increase the gap between the side of the elastic sheet 3 away from the center of the heating plate 2 and the edge of the heating plate 2, so as to achieve the effect of facilitating the assembly of the heat preservation cover 1, thereby improving the assembly efficiency of the heat preservation cover 1, and further improving the assembly efficiency of the pressure cooking appliance.

[0066] The present application does not specifically limit the structure of the limiting portion 221. Preferably, the limiting portion 221 is a sheet-like structure to increase the contact area between the limiting portion 221 and the deformation section 31, thereby increasing the limiting effect on the elastic sheet 3, and further increasing the stability of the elastic sheet 3. In other embodiments, the limiting portion 221 can also be a block structure or other structure, as long as it can achieve interference with the side of the deformation section 31 to limit the elastic sheet 3.

[0067] Further, refer to Figure 3 and Figure 5 A limiting surface is set on the side of the limiting portion 221 away from the center of the heating plate 2, and the limiting surface is adapted to the shape of the deformation segment 31, so that after the elastic sheet 3 is installed in place, the side surface of the deformation segment 31 contacts the limiting surface, so as to further increase the contact area between the limiting portion 221 and the deformation segment 31, thereby further increasing the stability of the elastic sheet 3.

[0068] In other embodiments, a plurality of limiting portions 221 may be provided, and the plurality of limiting portions 221 are respectively provided corresponding to two supporting segments 32 and are located on the same side of the supporting segment 32; or the plurality of limiting portions 221 are respectively located on both sides of the deformation.

[0069] The present application does not specifically limit the connection method between the limiting portion 221 and the heating plate 2. Preferably, refer to Figure 3 and Figure 5 A reinforcing portion 222 is provided on one side of the contact portion 213, and the reinforcing portion 222 extends toward the limiting portion 221 and is connected to the limiting portion 221. The bottom end surface of the reinforcing portion 222 is not lower than the bottom end surface of the contact portion 213. That is, the limiting portion 221 is connected to the heating plate 2 through the reinforcing portion 222.

[0070] Specifically, the reinforcing portion 222 is located on one side of the contact portion 213 close to the center of the heating plate 2, and the bottom end surface of the reinforcing portion 222 is flush with the bottom end surface of the contact portion 213 or the bottom end surface of the reinforcing portion 222 is higher than the bottom end surface of the contact portion 213 to ensure that the elastic sheet 3 can contact the bottom end surface of the contact.

[0071] The limiting part 221 is connected to the heating plate 2 through the reinforcing part 222, so that the limiting part 221 and other structures on the heating plate 2 are avoided to increase the compactness of the structure of the heating plate 2. At the same time, the stability of the limiting part 221 can be ensured to ensure the limiting effect of the limiting part 221 on the elastic sheet 3.

[0072] The present application does not specifically limit the structure of the reinforcing portion 222. Preferably, the reinforcing portion 222 is a sheet-like structure extending radially along the heating plate 2 to reduce the weight of the heating plate 2 and facilitate the user to move the pressure cooking device. In other implementation examples, the reinforcing portion 222 may also be a block-like structure.

[0073] In other embodiments, the limiting portion 221 may also be bent and extended toward the heating disk 2 and connected to the heating disk 2 , that is, the limiting portion 221 is directly connected to the heating disk 2 .

[0074] In the prior art, the main body 212 is generally configured to be a special shape, and the positioning hole 311 is configured to be a shape that matches the special shape of the main body 212 . This method will further cause uneven stress to be generated on the elastic sheet 3 , thereby accelerating the damage of the elastic sheet 3 .

[0075] In a preferred embodiment, the main body 212 is a columnar structure with a circular cross-section, and the positioning hole 311 is a shape adapted to the main body 212 to further avoid the elastic sheet 3 from generating uneven stress, thereby increasing the service life and fatigue resistance of the elastic sheet 3.

[0076] Preferably, the diameter of the main body 212 is gradually reduced in the direction away from the heating plate 2, so as to facilitate the insertion of the elastic sheet 3 on the main body 212, thereby improving the assembly efficiency of the elastic sheet 3 and further improving the production effect of the pressure cooking appliance.

[0077] In a preferred embodiment, referring to Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.11 The heat preservation cover 1 is provided with support bosses 11 at intervals, and a deformation space for the elastic sheet 3 to deform is formed between the support bosses 11. The two ends of the elastic sheet 3 respectively abut against the support bosses 11, and the top of the support bosses 11 has a support plane 111 in contact with the elastic sheet 3.

[0078] Specifically, the elastic sheet 3 has a deformation section 31 and support sections 32 located at both ends of the deformation section 31 . The support section 32 abuts against the support plane 111 on the support boss 11 to increase the contact area between the support section 32 and the support boss 11 , thereby increasing the support stability of the support boss 11 on the support section 32 .

[0079] The present application does not specifically limit the formation method of the support boss 11. Preferably, the support boss 11 is formed by the bottom wall of the heat-insulating cover 1 protruding upward, so as to reduce the production cost of the heat-insulating cover, increase the structural strength of the heat-insulating cover 1, and reduce the risk of deformation of the heat-insulating cover 1. In other embodiments, the support boss 11 can also be a block structure separately provided at the bottom of the heat-insulating cover 1.

[0080] In a preferred embodiment, referring to Fig. 9 and Fig.11A matching straight edge 112 is provided on one side of the support boss 11 close to the main body 212, so that when the elastic sheet 3 is deformed under pressure, the matching straight edge 112 contacts the elastic sheet 3 to ensure the contact area between the support boss 11 and the elastic sheet 3, thereby ensuring the stability and service life of the elastic sheet 3 and increasing the fatigue resistance of the elastic sheet 3.

[0081] In a preferred embodiment, referring to Figure 2 , Figure 4 and Figure 5 A trigger switch is provided at the bottom of the heat preservation cover 1, and the heating plate 2 is provided with a trigger portion 218 that passes through the heat preservation cover 1 and is used to trigger the trigger switch. The heating plate 2 includes a plate body 21 and a heating element 22 extending circumferentially along the plate body 21, and the trigger portion 218 is provided with an extension portion 219 extending to the bottom of the heating element 22.

[0082] The trigger portion 218 is provided with an extension portion 219 extending to the bottom of the heating element 22, so that the extension portion 219 applies a force toward the disk body 21 to the heating element 22, so that the extension portion 219 supports the heating element 22 to increase the connection stability between the heating element 22 and the disk body 21, thereby improving the quality of the heating disk 2, increasing the service life of the heating disk 2, and enhancing the user experience.

[0083] The present application does not make any specific limitation on the structure of the trigger portion 218. Preferably, the trigger portion 218 is a columnar structure whose diameter gradually decreases in the direction away from the heating plate 2, so as to facilitate the trigger portion 218 to extend out of the heat preservation cover 1, thereby improving the assembly efficiency of the heat preservation cover 1 and further improving the production efficiency of the pressure cooking appliance.

[0084] The pressure cooking device also includes an inner pot and a pot cover. The inner pot is located in the heat preservation cover 1 and abuts against the heating plate 2. The pot cover is arranged at the edge of the inner pot and forms a sealed cooking cavity together with the inner pot.

[0085] When the heating plate 2 starts to heat the inner pot, the temperature in the cooking cavity gradually increases, and then the pressure in the cooking cavity gradually increases. At this time, the inner pot pushes the heating plate 2 downward under the action of the pressure in the cooking cavity, so that the elastic sheet 3 is deformed. When the pressure in the cooking cavity is released, the elastic sheet 3 recovers its deformation, so that the elastic sheet 3 can deform with the pressure change in the cooking cavity. When the pressure in the cooking cavity is greater than the set value, the trigger part 218 moves to the set position to contact the trigger switch and apply pressure to the inner pot, so that the heating plate 2 stops heating the inner pot. As the time when the heating plate 2 stops heating the inner pot continues to increase, the pressure in the cooking cavity gradually decreases, the elastic sheet 3 gradually recovers its deformation, and the heating plate 2 drives the trigger part 218 to gradually move upward, so that the trigger part 218 is separated from the trigger switch, and the heating plate 2 continues to heat the inner pot.

[0086] The present application does not specifically limit the number of elastic members. Preferably, refer to Figure 1 , Figure 4 and Figure 5 , three elastic members are evenly spaced along the circumference of the heating plate 2 to ensure the elastic support effect of the heating plate 2. In other embodiments, the elastic members can also be set to two, four or even more, as long as the elastic support of the heating plate 2 can be achieved.

[0087] The present application does not specifically limit the connection method between the heating plate 2 and the thermal insulation cover 1. Preferably, the thermal insulation cover 1 is provided with a through hole corresponding to the body 212, and the end of the body 212 away from the heating plate 2 extends out of the bottom of the thermal insulation cover 1 through the through hole, and the end of the body 212 away from the heating plate 2 is threadedly connected with a screw 214, and a gasket 215 is pierced on the screw 214. The diameter of the gasket 215 is larger than the diameter of the through hole, so that the gasket 215 blocks the screw 214 to increase the connection stability between the heating plate 2 and the thermal insulation cover 1. In other embodiments, a bayonet can also be pierced through the end of the body 212 extending out of the bottom of the thermal insulation cover 1 through the through hole, and the bayonet cooperates with the bottom wall stop of the thermal insulation cover 1 to achieve the connection between the heating plate 2 and the thermal insulation cover 1.

[0088] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0089] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0090] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A pressure cooking device, comprising a heat preservation cover, a heating plate arranged in the heat preservation cover, and an elastic sheet located between the heat preservation cover and the heating plate, characterized in that: The elastic sheet is provided with a positioning hole, and the heating plate is provided with a positioning column. The positioning column comprises a body penetrating the positioning hole, and a contact portion. When the elastic sheet is deformed under pressure, the contact portion makes linear contact with the elastic sheet.

2. A pressure cooking device according to claim 1, characterized in that: The elastic sheet has a deformation section and support sections located at both ends of the deformation section. The contact portion is arranged corresponding to the support section, and the contact portion has a support straight edge that cooperates with the elastic sheet.

3. A pressure cooking device according to claim 2, characterized in that: The contact portion is a square structure surrounding the body, and the top edge of the square structure corresponding to the support section constitutes the support straight edge.

4. A pressure cooking device according to claim 1, characterized in that: The elastic sheet has a deformation section and support sections located at both ends of the deformation section. The contact portion is arranged corresponding to the support section. The contact portion has a support surface. When the elastic sheet is deformed under pressure, the support surface contacts the elastic sheet.

5. The pressure cooking device according to claim 1, characterized in that: A gap is formed between the contact portion and the body.

6. The pressure cooking device according to claim 1, characterized in that: A limiting portion is disposed on one side of the contact portion, and the limiting portion cooperates with the elastic sheet to limit the elastic sheet from rotating around the body.

7. A pressure cooking device according to claim 6, characterized in that: The elastic sheet has a deformation section where the positioning hole is arranged and support sections located at two ends of the deformation section, and the limiting portion abuts against the side surface of the deformation section.

8. The pressure cooking device according to claim 6, characterized in that: A reinforcing portion is disposed on one side of the contact portion, the reinforcing portion extends toward the limiting portion and is connected to the limiting portion, and a bottom end surface of the reinforcing portion is disposed not lower than a bottom end surface of the contact portion.

9. The pressure cooking device according to claim 1, characterized in that: The heat preservation cover is provided with supporting bosses at intervals, and a deformation space for the elastic sheet to deform is formed between the supporting bosses. Both ends of the elastic sheet are respectively in contact with the supporting bosses, and the top of the supporting bosses has a supporting plane in contact with the elastic sheet.

10. The pressure cooking device according to claim 1, characterized in that: A trigger switch is arranged at the bottom of the heat preservation cover, and the heating disk is provided with a trigger part passing through the heat preservation cover for triggering the trigger switch. The heating disk includes a disk body and a heating element extending circumferentially along the disk body, and the trigger part is provided with an extension part extending to the bottom of the heating element.

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