Casing and cooking appliance

Abstract

The application discloses a shell and a cooking utensil. The shell comprises a metal body, the metal body comprises a first end and a second end, and the first end and the second end are connected to make the metal body annular. The first end and the second end are directly connected to form a joint, or the first end and the second end are connected through a metal connecting sheet to form the joint. The joint has a multilayer metal sheet laminated structure, a groove is formed in the direction of the multilayer metal sheet lamination, part of the side wall of the groove is cut off to form a fracture surface, and the metal sheet in the groove and the adjacent metal sheet outside the groove are in contact through the fracture surface. According to the application, after the connecting part of the shell is dislocated and deformed along the metal sheet lamination direction, each metal sheet can be attached to the adjacent metal sheet at the fractured cross section, the contact area of the two metal sheets is large, the contact resistance is small, and thus, a serious eddy current heating phenomenon will not occur. The metal sheets are inlaid with each other at the connecting part, the strength of the connection is strengthened, and relative displacement of the two metal sheets can be prevented.

Description

Technical Field

[0001] This application relates to the field of cooking appliance technology, and more specifically to a housing and a cooking appliance. Background Technology

[0002] Existing electric cooking appliances, when using IH (inductive heating) technology, generate eddy currents in the metal casing. This can easily lead to localized conductivity at the casing joints, resulting in high contact resistance and significant heat generation. This can cause plastic parts to melt, or produce smoke and unpleasant odors, leading to customer complaints. The solution in existing technology CN215820611U is as follows:

[0003] By stamping to form a press-fit part at the connection of the outer shell, the coating on the surface of the outer shell is interrupted or cracked. This allows the first and second ends of the shell to conduct at the edge of each folded layer of the press-fit part. The induced current can flow from the first end to the second end to form a conductive circuit. This increases the conductive area of ​​the shell at the connection and reduces the contact resistance of the shell, thereby reducing the heat generated by eddy currents and avoiding local high temperature.

[0004] However, the above solution only forms a press-fit part by stamping at the connection of the outer shell, which cannot necessarily guarantee that the coating on the surface of the outer shell will be interrupted or cracked. There are still some outer shells whose coating is not interrupted or cracked after stamping, resulting in a high defect rate of the outer shell.

[0005] Therefore, a shell is needed to at least partially solve the above problems. Utility Model Content

[0006] The description of this utility model introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This description is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0007] To at least partially solve the above problems, a first aspect of this application provides a housing comprising a metal body, the metal body including a first end and a second end, the first end and the second end being connected to make the metal body annular, wherein the first end and the second end are directly connected to form a joint, or the first end and the second end are connected by a metal connecting piece to form a joint.

[0008] The joint has a multi-layer metal sheet stacked structure, and a groove is formed in the direction of the multi-layer metal sheet stacking. Part of the sidewall of the groove is cut to form a cross-section, and the metal sheet inside the groove and the adjacent metal sheet outside the groove are in contact through the cross-section.

[0009] According to this application, the joint of the metal body forms a multi-layered metal sheet structure, with a groove formed in the direction of the multi-layered metal sheet stacking. Part of the sidewall of the groove is cut to form a cross-section. Because a portion of the metal sheet is cut off, after misalignment and deformation along the stacking direction, each metal sheet can contact the adjacent metal sheet at the fracture point. That is, two adjacent metal sheets fit together at the fracture cross-section, allowing electrical conduction between the two adjacent metal sheets in a direction perpendicular to the stacking direction. The cut-off sidewall of the groove ensures that there is no coating at the cross-section, and the contact resistance between adjacent metal sheets is low, thus preventing severe eddy current heating. Furthermore, forming the groove in the direction of the multi-layered metal sheet stacking allows the metal sheets to interlock at the joint, strengthening the connection and preventing the joint from detaching.

[0010] Optionally, the first end and the second end are directly connected to form a joint, wherein the first end is bent to form a first folded edge, the second end is bent to form a second folded edge, and the first folded edge and the second folded edge are hooked together to form a joint having the multilayer metal sheet stacked structure.

[0011] According to this application, the two ends of the metal body can be directly hooked together to form a multi-layered metal sheet structure, which makes the metal sheets firmly connected, not easy to loosen, and saves materials and reduces costs.

[0012] Optionally, the first end and the second end are connected by a metal connecting piece to form a joint, wherein the first end is bent to form a first folded edge, the second end is bent to form a second folded edge, one end of the metal connecting piece is bent to form a third folded edge, and the other end of the metal connecting piece is bent to form a fourth folded edge. The first folded edge and the third folded edge are hooked together to form the joint with a multi-layer metal sheet stacked structure, and the second folded edge and the fourth folded edge are hooked together to form the joint with a multi-layer metal sheet stacked structure.

[0013] According to this application, the two ends of the metal body can be connected by metal connecting pieces to form a joint, and a multi-layer metal sheet stacked structure is formed at the joint. The hook connection makes the joint firmly connected and not easy to loosen.

[0014] Optionally, the groove protrudes towards the inside of the metal body.

[0015] According to this application, the metal sheet forms a stub at the cut boundary, and the stacked metal sheets protrude toward the inside of the shell, which can prevent the stub from protruding from the outer surface of the shell and causing scratches or other safety problems.

[0016] Optionally, the metal body and the metal connecting piece have the same thickness.

[0017] According to this application, the distance between multiple metal sheets in the stacking direction can be controlled by a simple method, so that in each layer, the cross-sectional area of ​​the connection between the metal body and the metal connecting piece is equal, ensuring stable electrical conduction between the two metal sheets.

[0018] Optionally, the thickness of the metal body is T, and the depth of the groove is D, where 0.25T≤D≤1.75T.

[0019] According to this application, in each layer, the dimension of the cross-section where the metal body and the metal connecting piece are connected along the stacking direction is 0.25T to T. This dimension can ensure that the contact area of ​​the two metal pieces at the cross-section is large enough.

[0020] Optionally, the thickness of the metal body is 0.28mm-0.4mm.

[0021] According to this application, the thickness of the metal sheet meets the strength requirements of the shell.

[0022] Optionally, the metal body and / or the metal connecting piece may be made of tinplate, chrome-plated iron, galvanized steel, or stainless steel.

[0023] According to this application, the shell material is readily available and inexpensive.

[0024] Optionally, the housing is constructed with a plurality of the connection structures arranged along the height direction.

[0025] According to this application, multiple connection structures can enhance connection strength, increase contact area, reduce contact resistance, and further suppress eddy current heat generation.

[0026] Optionally, the groove is circular, elliptical, polygonal, or oblong.

[0027] According to this application, the shape of the connecting area can be flexibly set.

[0028] Optionally, the surfaces of the metal body and / or the metal connecting piece are coated.

[0029] According to this application, the coating can prevent corrosion of the metal body and metal connecting pieces.

[0030] The second aspect of this application provides a cooking appliance that includes a housing according to any one of the first aspects.

[0031] According to this application, the joint of the housing forms a multi-layered metal sheet structure, with a groove formed in the direction of the multi-layered metal sheet stacking. Part of the sidewall of the groove is cut to form a cross-section. Because a portion of the metal sheet is cut off, after misalignment and deformation along the stacking direction, each metal sheet can contact the adjacent metal sheet at the fracture point. That is, two adjacent metal sheets fit together at the fracture cross-section, allowing electrical conduction between the two adjacent metal sheets in a direction perpendicular to the stacking direction. The cut-off sidewall of the groove ensures that there is no coating at the cross-section, and the contact resistance between adjacent metal sheets is low, thus preventing severe eddy current heating. Furthermore, forming the groove in the direction of the multi-layered metal sheet stacking allows the metal sheets to interlock at the joint, strengthening the connection and preventing the joint from detaching. Attached Figure Description

[0032] The following drawings, which are incorporated herein by reference and used to understand this application, illustrate embodiments of the application and their descriptions, thereby explaining the principles of the application.

[0033] In the attached image:

[0034] Figure 1 This is a perspective view of a cooking utensil according to a specific embodiment of this application;

[0035] Figure 2 for Figure 1 Rear view of the housing;

[0036] Figure 3 for Figure 1 A top view of the shell inside;

[0037] Figure 4 for Figure 2 An enlarged schematic diagram of the cross section along line CC of the first example in part A;

[0038] Figure 5 for Figure 3 An enlarged schematic diagram of the cross-section along line DD in part B of the diagram;

[0039] Figure 6 for Figure 2 An enlarged schematic diagram of part A in the diagram;

[0040] Figure 7 for Figure 2 An enlarged schematic diagram of the cross section along line CC of the second example in part A;

[0041] Figure 8 for Figure 7 Rear view diagram of the structure;

[0042] Explanation of reference numerals in the attached figures:

[0043] 10: Claypot

[0044] 11: Inner pot

[0045] 12: Shell

[0046] 14: Metal connecting piece

[0047] 15: Metal Body, Part 1

[0048] 16: Part Two of the Metal Body

[0049] 17: Metal connecting piece, first part

[0050] 18: Part Two of the Metal Connecting Piece

[0051] 19: Metal body

[0052] 20: Cover

[0053] 23: Top temperature sensor assembly

[0054] 24: Steam valve

[0055] 31: First end of the metal body

[0056] 32: First end of metal connecting piece

[0057] 33: Edge of the first end of the metal body

[0058] 34: Edge of the second end of the metal connecting piece

[0059] 35: Second end of the metal body

[0060] 36: Second end of the metal connecting piece

[0061] 40: Groove

[0062] 41: First sidewall

[0063] 42: Second sidewall

[0064] 43: Third sidewall

[0065] 44: Fourth sidewall

[0066] 55: First folded edge

[0067] 56: Second folded edge

[0068] 57: Third fold edge

[0069] 58: Fourth fold edge

[0070] 60: Connector

[0071] 100: Cooking utensils

[0072] DT: Thickness direction

[0073] DH: Altitude Detailed Implementation

[0074] The following description provides numerous specific details to offer a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with this application.

[0075] To fully understand this application, a detailed description will be provided below. It is obvious that the implementation of embodiments of this application is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this application are described in detail below; however, other embodiments may also be available in addition to these detailed descriptions.

[0076] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0077] In understanding the scope of this application, the term "comprising" and its derivatives, as used herein, are intended to be open-ended terms that specify the presence of a described feature, element, component, group, whole, and / or step, but do not exclude the presence of other undescribed features, elements, components, groups, wholes, and / or steps. This concept also applies to words with similar meanings, such as the terms "comprising," "having," and their derivatives.

[0078] The term "attached" or "joined" as used herein includes: a construction in which one element is directly fixed to another element by fixing it directly to another element; a construction in which one element is indirectly fixed to another element by fixing it to an intermediate member, which in turn is fixed to another element; and a construction in which one element is integral with another element, that is, one element is substantially part of another element. This definition also applies to words with similar meanings, such as "connect," "joint," "couple," "install," "adhere," "fix," and their derivatives. Finally, degree terms such as "substantially," "approximately," and "approximately" as used herein indicate the amount of deviation from which modifications to the terminology do not significantly alter the final result.

[0079] Ordinal numbers such as “first” and “second” used in this application are merely identifiers and have no other meaning, such as a specific order. Moreover, for example, the term “first component” does not imply the existence of a “second component”, and the term “second component” does not imply the existence of a “first component”.

[0080] It should be noted that the terms "upper," "lower," "front," "back," and "left" used in this article are different.

[0081] The terms "right," "inner," "outer," and similar expressions are for illustrative purposes only and are not intended to be restrictive.

[0082] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0083] Unless otherwise stated, the numerical ranges in this document include not only the entire range within its two endpoints, but also the subranges contained therein.

[0084] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0085] This application provides a housing and a cooking appliance, particularly a metal housing, and an electromagnetic heating cooking appliance using the metal housing. The cooking appliance according to this application includes, for example, a rice cooker, an electric pressure cooker, an electric slow cooker, a soymilk maker, a blender, etc.

[0086] like Figure 1 As shown, in one specific embodiment, the cooking appliance 100 may include a pot body 10 and a lid 20. Typically, the pot body 10 includes an inner pot 11 for holding food. The space inside the inner pot 11 forms a cooking cavity. The pot body 10 may have a cylindrical (or other shaped) storage section, from which the inner pot 11 can be freely placed or removed for easy cleaning. The inner pot 11 is made of metal and constructed as a rotating body with an opening and an inner cavity formed by the pot wall. The capacity of the inner pot 11 is typically less than 6L; for example, the capacity of the inner pot 11 may be 2L or 4L, etc.

[0087] The lid 20 is pivotally connected to the pot body 10 via a pivot shaft for closing the pot body 10. The lid 20 may be equipped with a top temperature sensor assembly 23 and a steam valve 24. The top temperature sensor assembly 23 is used to sense the temperature of the top of the cooking cavity. The steam valve 24 provides a steam passage. When the lid 20 is closed to the pot body 10, the steam passage is connected to the cooking cavity, and the steam generated during cooking can be released into the environment through the steam passage.

[0088] The cooking appliance 100 also includes a control device (not shown) for controlling the cooking process. This control device may be, for example, a microcontroller unit (MCU).

[0089] In addition, the cooking appliance may also have a heating element (not shown) and a bottom temperature measuring device (not shown). The heating element (e.g., a coil) is typically located at the bottom of the pot body 10 and is used to heat the inner pot 11 under the control of a control device, thereby achieving the cooking function. The bottom temperature measuring device (e.g., a temperature sensor) is also typically located at the bottom of the pot body 10 and is used to sense the bottom temperature of the pot body 10 (or the inner pot 11). The bottom temperature measuring device, the top temperature sensor assembly 23, and the heating element are all electrically connected to the control device of the cooking appliance, thereby enabling the control device to achieve more precise control of the heating element and the like based on temperature information.

[0090] The cooking appliance 100 has a housing 12. For example, the housing 12 may be the outer shell or part of the outer shell of the pot body 10.

[0091] like Figures 1 to 3 As shown, the shell 12 includes a metal body 19 (which can be understood as a metal sheet), with its two ends (first end 31 and second end 35) connected along its length, forming a ring. For example, the two ends of the metal body 19 are connected at the rear of the pot body 10. Typically, the pot body 10 has a vertical plane of symmetry SA extending in the front-rear direction, meaning the pot body 10 is generally symmetrical from left to right. Consequently, the shell 12 is generally symmetrical from left to right. Consequently, the metal body 19 is generally symmetrical from left to right. The metal body 19 has a first end 31 and a second end 35 located on either side of the plane of symmetry SA. The first end 31 and the second end 35 are generally symmetrical about the plane of symmetry SA.

[0092] At least one connector 60 is formed at the connection between the first end 31 and the second end 35 of the metal body 19, and the two ends of the metal body 19 are connected by the connector 60. The connector 60 has a multi-layer metal sheet stacked structure at the connector, and a groove is formed in the direction of the multi-layer metal sheet stacking. Part of the sidewall of the groove is cut to form a cross-section, and the metal sheet inside the groove and the adjacent metal sheet outside the groove are in contact through the cross-section.

[0093] exist Figures 4 to 6In the first example shown, a metal connecting piece 14 connects the two ends of the metal body 19. That is, the first end 31 and the second end 35 are connected by the metal connecting piece 14 to form a joint. The metal connecting piece 14 has a first end 32 and a second end 36 that are opposite in length direction. The first end 31 of the metal body and the first end 32 of the metal connecting piece are connected by a joint 60. The second end 35 of the metal body and the second end 36 of the metal connecting piece are connected by a joint 60.

[0094] The following is based on Figures 4 to 6 The connector 60 at the second end 35 is used as an example to introduce in detail the connection method between the first end 31 of the metal body and the first end 32 of the metal connecting piece.

[0095] like Figure 4 As shown, the first end 31 of the metal body is bent approximately 180 degrees to form a first folded edge 55, which has opposing first portions 15 and second portions 16 of the metal body. The first portion 15 is closer to the edge 33 (end line) of the first end 31 than the second portion 16. The first end 32 of the metal connecting piece is bent approximately 180 degrees to form a third folded edge 57, which has opposing first portions 17 and second portions 18 of the metal connecting piece. The first portion 17 is closer to the edge 34 (end line) of the first end 32 than the second portion 18. The first folded edge 55 and the third folded edge 57 are hooked together, such that the first portion 15 of the metal body is located between the first portion 17 and the second portion 18 of the metal connecting piece, and the first portion 17 of the metal connecting piece is located between the first portion 15 and the second portion 16 of the metal body. Thus, the second part 16 of the metal body, the first part 17 of the metal connecting piece, the first part 15 of the metal body, and the second part 18 of the metal connecting piece are arranged sequentially along the thickness direction DT of the metal sheet, forming a structure in which the metal body 19 and the metal connecting piece 14 are alternately stacked. The thickness direction DT of the metal sheet is also the stacking direction of the metal sheet. The second part 16 of the metal body, the first part 17 of the metal connecting piece, the first part 15 of the metal body, and the second part 18 of the metal connecting piece are sequentially bonded together along the stacking direction DT.

[0096] A groove 40 is formed in the stacking direction DT of the first part 15 of the metal body, the second part 16 of the metal body, the first part 17 of the metal connecting piece, and the second part 18 of the metal connecting piece. The groove 40 is formed by stamping along the stacking direction DT. Part of the sidewall of the groove 40 is cut off to form a cross-section, such as... Figure 6As shown, the groove 40 is square and includes four sidewalls, namely the first sidewall 41, the second sidewall 42, the third sidewall 43 and the fourth sidewall 44. The first sidewall 41, the second sidewall 42 and the third sidewall 43 are cut to form cross-sections, while the fourth sidewall 44 is not cut, so that the metal sheet inside the groove 40 is not completely separated from the mother body (the metal sheet outside the groove 40).

[0097] like Figure 5 As shown, the portion of each of the first metal body part 15, the second metal body part 16, the first metal connecting piece part 17, and the second metal connecting piece part 18 located in the groove 40 is offset relative to the portion outside the groove 40 along the stacking direction DT of the metal sheets (the offset distance is D). This causes the second metal body part 16 inside the groove 40 and the first metal connecting piece part 17 outside the groove 40 to contact at the cross-section, the first metal connecting piece part 17 inside the groove 40 and the first metal body part 15 outside the groove 40 to contact at the cross-section, and the first metal body part 15 outside the groove 40 and the second metal connecting piece part 18 outside the groove 40 to contact at the cross-section. The cross-section extends parallel to the stacking direction DT. That is, the metal sheet inside the groove and the adjacent metal sheet outside the groove contact each other through the cross-section.

[0098] Since the groove 40 is formed by stamping along the stacking direction at the location of multiple layers of metal sheets, the metal sheets inside the groove 40 and the metal sheets outside the groove 40 are misaligned along the stacking direction DT. The metal sheet inside the groove 40 can contact the adjacent metal sheet outside the groove 40 at the cross-section, that is, the two adjacent metal sheets are attached at the fracture cross-section, so that the two adjacent metal sheets are electrically conductive in the direction perpendicular to the stacking direction DT. One of the two adjacent metal sheets comes from the metal body 19 and the other comes from the metal connecting piece 14. In this way, the metal body 19 and the metal connecting piece 14 are conductive, and the electrical connection point between the two is the cross-section at the fracture point (the metal cross-section contacts the metal cross-section to form a connection). This ensures that there is no coating at the contact point, and the contact resistance between the two metal sheets is small, so no serious eddy current heating phenomenon will be generated.

[0099] The second end 35 of the metal body and the second end 36 of the metal connecting piece are connected in a similar manner. The second end 35 of the metal body is bent to form a second folded edge 56, and the second end 36 of the metal connecting piece is bent to form a fourth folded edge 58. The second folded edge 56 and the fourth folded edge 58 are hooked together to form a joint 60 with a multi-layer metal sheet stacked structure, so that the two ends of the metal body 19 are connected together by the metal connecting piece 14. A groove 40 is formed in the direction of the multi-layer metal sheet stacking. Part of the sidewall of the groove 40 is cut to form a cross-section. The metal sheet inside the groove 40 and the adjacent metal sheet outside the groove 40 are in contact through the cross-section, which makes the contact resistance of the shell 12 smaller and solves the problem of eddy current heat generation.

[0100] Optionally, the connector 60 can be formed by a pressing process. That is, after bending and hooking the ends of the metal body 19 and the metal connecting piece 14, the first part 15 of the metal body, the second part 16 of the metal body, the first part 17 of the metal connecting piece, and the second part 18 of the metal connecting piece are pressed together in the groove 40. By designing a mold, the sidewall of the groove 40 can be cut off during pressing, and the multi-layer metal sheets can be appropriately shifted along the stacking direction DT.

[0101] Because the metal body 19 and the metal connecting piece 14 are connected at the cross-section, at least one of the metal body 19 and the metal connecting piece 14 can be coated with a coating (e.g., anti-rust paint) without preventing the cross-section from being a metal surface.

[0102] The joint 60 formed by the second end 35 of the metal body and the second end 36 of the metal connecting piece is radially symmetrical about the plane of symmetry SA, for example, with the joint 60 formed by the first end 31 of the metal body and the first end 32 of the metal connecting piece.

[0103] Preferably, the metal body 19 and the metal connecting piece 14 have the same thickness. This facilitates the simple control of the distance D (i.e., the depth of the groove) between the multiple metal sheets in the stacking direction DT, ensuring that the cross-sectional area of ​​the connection between the metal body 19 and the metal connecting piece 14 is equal in each layer, guaranteeing stable electrical conduction between the two metal sheets. The thickness of the metal body 19 and the metal connecting piece 14 is, for example, T, optionally 0.25T ≤ D ≤ 1.75T. That is, in each layer, the dimension of the cross-section of the connection between the metal body 19 and the metal connecting piece 14 along the stacking direction DT is 0.25T to T. Further, 0.5T ≤ D ≤ 1.5T, that is, the dimension of the cross-section of the connection between the metal body 19 and the metal connecting piece 14 along the stacking direction DT is 0.5T to T. Furthermore, D and T are approximately equal (as shown in the example), that is, the dimension of the cross section connecting the metal body 19 and the metal connecting piece 14 along the stacking direction DT is approximately T, and almost all the original metal pieces of each layer are filled and embedded by the metal pieces of the adjacent layers in a shape-indistinguishable manner.

[0104] Preferably, the thickness of the metal body 19 and the metal connecting piece 14 is 0.28 mm to 0.4 mm. The metal body 19 and the metal connecting piece 14 can be made of metal sheets such as tinplate, galvanized sheet, chrome-plated iron, and stainless steel.

[0105] The cut-off sidewall of the groove 40 can be located on the upper, lower, left, or right side of the groove 40. The groove 40 can be generally circular, elliptical, polygonal (triangle, quadrilateral, or a polygon with more sides), or oblong (capsule-shaped). Correspondingly, the cut-off sidewall can be a segment of an arc, a portion of an ellipse, a broken line forming a semi-enclosed structure, or a portion of an oblong. Figure 4 and Figure 5 In the example shown, the groove 40 is quadrilateral, such as a rectangle, and the cut-off boundary 45 is located on three sides of the rectangle. In this application, the directions such as up, down, left, right, front, and back are determined when the cooking appliance 100 is upright and in a normal position relative to the user.

[0106] The dimension of the groove 40 perpendicular to the stacking direction DT (i.e., the thickness direction of the housing 12) is greater than or equal to 2 mm. For example, in the illustrated example, at least one of the height H and width W of the rectangle of the groove 40 is greater than or equal to 2 mm. This ensures that the cross-section used for connection has sufficient area. The dimension of the groove 40 perpendicular to the stacking direction DT is less than or equal to 5 mm. For example, in the illustrated example, at least one of the height H and width W of the rectangle of the groove 40 is less than or equal to 5 mm. This limits the area of ​​the groove 40 and prevents the length of the cut sidewall from becoming excessive, thereby ensuring the strength of the housing 12. Understandably, the cut sidewall extends through the entire thickness of the housing 12, and due to the overall misalignment of the metal sheet, the length dimension of the metal sheet is distributed in the thickness direction, thus forming cracks and breaks in the housing 12 at the cut sidewall. The overall misalignment of the metal sheet also causes the groove 40 to form depressions and protrusions on the surface of the housing 12. Limiting the area of ​​the groove 40 can make the surface of the housing 12 smoother and also allow the pressing mold to have suitable dimensions.

[0107] The portions of each of the first metal body portion 15, the second metal body portion 16, the first metal connecting piece portion 17, and the second metal connecting piece portion 18 located in the groove 40 are misaligned relative to the portions outside the groove 40 in the same direction. In the illustrated example, the second metal body portion 16 is located at the outermost side of the housing 12, and the second metal connecting piece portion 18 is located at the innermost side of the housing 12. The portions of each of the first metal body portion 15, the second metal body portion 16, the first metal connecting piece portion 17, and the second metal connecting piece portion 18 located in the groove 40 protrude towards the inner side of the housing 12 relative to the portions outside the groove 40 along the stacking direction DT of the metal pieces. Compared to a scheme where the stacked metal pieces protrude towards the outer side of the housing 12, this avoids the stubs formed at the cut surfaces of the housing 12 protruding from the housing surface, causing scratches or other safety issues, and also makes the pressing process easier to implement.

[0108] Optionally, the housing 12 may be constructed with a plurality of joints 60 arranged along the height direction DH. For example, the first end 31 of the metal body and the first end 32 of the metal connecting piece may be formed into joints 60 by pressing them together at three positions: upper, middle, and lower. Alternatively, the first end 31 of the metal body and the first end 32 of the metal connecting piece may also be formed into joints 60 by pressing them together at two positions: upper and lower.

[0109] The following is an introduction Figure 7 and Figure 8 The second example is shown.

[0110] exist Figure 7 and Figure 8 In the example shown, the housing 12 consists only of a metal body 19. That is, the two ends of the metal body 19 are directly connected to form a joint, for example, the two ends are respectively constructed as a first folded edge 55 and a second folded edge 56, which are then hooked together to form a multi-layered metal sheet that alternates and is stacked, and then pressed together at the multi-layered parts to form a joint 60.

[0111] For any parts not described in the second example, please refer to the description in the first example.

[0112] The connection structure of this application allows the two metal sheets to have a large contact area at the connection point of the metal sheets in the metal shell, thereby reducing the contact resistance and effectively suppressing eddy current heating.

[0113] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Features described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0114] This application has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the described embodiments. Furthermore, those skilled in the art will understand that this application is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this application, all of which fall within the scope of protection claimed in this application.

Claims

1. A housing, characterized in that, The device includes a metal body, which has a first end and a second end. The first end and the second end are connected to form a ring shape. The first end and the second end are either directly connected to form a connector, or connected by a metal connecting piece to form a connector. The joint has a multi-layer metal sheet stacked structure, and a groove is formed in the direction of the multi-layer metal sheet stacking. Part of the sidewall of the groove is cut to form a cross-section, and the metal sheet inside the groove and the adjacent metal sheet outside the groove are in contact through the cross-section.

2. The housing according to claim 1, characterized in that, The first end and the second end are directly connected to form a connector, wherein The first end is bent to form a first folded edge, and the second end is bent to form a second folded edge. The first folded edge and the second folded edge are hooked together to form a joint having the multi-layer metal sheet stacked structure.

3. The housing according to claim 1, characterized in that, The first end and the second end are connected by a metal connecting piece to form a connector, wherein The first end is bent to form a first folded edge, the second end is bent to form a second folded edge, one end of the metal connecting piece is bent to form a third folded edge, and the other end of the metal connecting piece is bent to form a fourth folded edge. The first folded edge and the third folded edge are hooked together to form the joint with the multi-layer metal sheet stacked structure. The second folded edge and the fourth folded edge are hooked together to form the joint with the multi-layer metal sheet stacked structure.

4. The housing according to claim 1, characterized in that, The groove protrudes towards the inside of the metal body.

5. The housing according to claim 1, characterized in that, The metal body and the metal connecting piece have the same thickness.

6. The housing according to claim 5, characterized in that, The thickness of the metal body is T, and the depth of the groove is D, where 0.25T ≤ D ≤ 1.75T; and / or The thickness of the metal body is 0.28mm-0.4mm.

7. The housing according to claim 1, characterized in that, The metal body and / or the metal connecting pieces are made of tinplate, chrome-plated iron, galvanized steel, or stainless steel; and / or The surface of the metal body and / or the metal connecting piece is coated.

8. The housing according to claim 1, characterized in that, Multiple grooves are provided along the height direction of the metal body.

9. The housing according to claim 1, characterized in that, The groove can be circular, elliptical, polygonal, or oblong.

10. A cooking utensil, characterized in that, Includes the housing according to any one of claims 1 to 9.

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