CN213154545U

CN213154545U - Electric heating lunch box

Info

Publication number: CN213154545U
Application number: CN202021613805.0U
Authority: CN
Inventors: 朱泽春; 胡炜
Original assignee: Hangzhou Joyoung Household Electrical Appliances Co Ltd
Current assignee: Hangzhou Jiuchuang Home Appliances Co ltd
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2021-05-11
Anticipated expiration: 2030-08-06

Abstract

The utility model relates to the field of electric heating lunch boxes, in particular to an electric heating lunch box, which comprises a lunch box body and a handle rotationally connected with the lunch box body, wherein the handle can rotate between a placing position and a carrying position, when the handle rotates to the placing position, the handle rotates to one side of the lunch box body, and when the handle rotates to the carrying position, the handle is vertical relative to the lunch box body; the handle has first limit structure, the lunch-box body has second limit structure, the handle rotates when carrying and holding the position, first limit structure with second limit structure butt is kept away from towards the stop the handle the direction of placing the position is rotated, the utility model discloses an electric heat lunch-box can be through setting up limit structure between handle and lunch-box body to reduce rocking of lunch-box body when carrying and holding, the effectual problem that exists among the prior art of having solved.

Description

Electric heating lunch box

Technical Field

The utility model relates to an electric heat lunch-box field, in particular to electric heat lunch-box.

Background

Because have easily carry, the advantage of heating, the application of electric heat lunch-box is more and more extensive, and at present, electric heat lunch-box on the market has can pivoted handle more to make things convenient for the user to carry and hold, like the portable electric heat lunch-box disclosed in patent 201920496921X, this type of lunch-box is when being carried, the handle easily with the lunch-box body between random rotation, lead to the lunch-box body easily to rock, influence the state of food in the lunch-box fits, use experience is relatively poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an electric heating lunch box can be through setting up limit structure between handle and lunch-box body to reduce rocking of lunch-box body when carrying, the effectual problem of having solved existence among the prior art.

In order to solve the problems, the utility model provides an electric heating lunch box, which comprises a lunch box body and a handle rotationally connected with the lunch box body, wherein the handle can rotate between a placing position and a carrying position, when the handle rotates to the placing position, the handle rotates to one side of the lunch box body, and when the handle rotates to the carrying position, the handle is vertical relative to the lunch box body; the handle is provided with a first limiting structure, the lunch box body is provided with a second limiting structure, and when the handle rotates to a carrying position, the first limiting structure is abutted against the second limiting structure to stop the handle to rotate towards a direction far away from the placing position.

Further, the lunch-box body sets up the connecting portion that have the shaft hole, the handle is formed with the cooperation and inserts the pivot in shaft hole, first limit structure for be formed in the spacing muscle of handle, second limit structure for be formed in the position muscle that ends of connecting portion.

Further, the pivot includes the first axial region and the second axial region of separation, the side of first axial region is formed with spacing muscle, second axial region with the shaft hole cooperation rotates, the cross-section of second axial region personally submits the arc, first axial region is formed with and stretches into the inboard strengthening rib of second axial region.

Further, the distance between the outer edge of the first shaft part and the axis of the second shaft part is smaller than the radius of the shaft hole, so that a gap is formed between the outer surface of the first shaft part and the wall of the shaft hole.

Further, the second shaft portion is in interference abutment with a hole wall of the shaft hole.

Furthermore, a buckling rib is formed at the outer end part of the second shaft part, and a bearing step matched with the buckling rib is formed at the edge of the shaft hole.

Furthermore, the connecting portion with the lunch-box body rotates to be connected, just connecting portion are equipped with third limit structure, the lunch-box body is equipped with fourth limit structure, when connecting portion rotated to vertical, fourth limit structure with third limit structure butt, with the locking connecting portion orientation is kept away from the direction of placing the position rotates.

Furthermore, the lunch box body is provided with a hinge hole, the connecting part is provided with a hinge shaft which can be inserted into the hinge hole, and the third limiting structure is a convex rib formed on the side surface of the hinge shaft;

furthermore, the radius of the first sector area is larger than that of the second sector area, after the hinge shaft is inserted into the hinge hole in a matched mode, the convex rib rotates in the first sector area, and the side edge of the first sector area forms the fourth limiting structure.

Further, the lunch-box body includes that box body, lock are in the lid at box body top, connecting portion with rotate between the box body and be connected, just connecting portion are formed with the locking structure, when connecting portion rotated to vertical, the locking structure will the lid compresses tightly the box body.

Furthermore, a convex locking rib plate is formed on the cover body, and the locking structure is a locking lug formed on the connecting part.

The utility model has the advantages that the utility model provides an electric heating lunch box, which can reduce the shaking of the lunch box body by arranging the spacing structure between the handle and the lunch box body when the handle is held; furthermore, the utility model discloses in, through being divided into first axial region and second axial region with the pivot, can the pivot of easy to assemble, go back the structural strength who sets up the strengthening rib and improve spacing muscle, the effectual problem that exists among the prior art of having solved.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural view of the connecting part and the lunch box body in the embodiment shown in fig. 1 after being disassembled.

Fig. 3 is a schematic structural diagram of the connecting portion in the embodiment shown in fig. 1.

Fig. 4 is a schematic structural view of the handle in the embodiment shown in fig. 1.

Fig. 5 is a schematic structural diagram of the cartridge body in the embodiment shown in fig. 1.

Wherein: 1. a lunch box body; 101. a box body; 102. a cover body; 103. locking rib plates; 2. a handle; 3. a connecting portion; 4. a rotating shaft; 401. a first shaft portion; 402. a second shaft portion; 403. reinforcing ribs; 404. buckling a position rib; 5. a shaft hole; 6. limiting ribs; 7. stopping the position rib; 8. supporting a step; 9. a hinge hole; 10. hinging a shaft; 1001. a rib is protruded; 11. a first sector area; 12. a second sector area; 13. and locking the lug.

Detailed Description

In order to more clearly explain the overall concept of the present invention, the following detailed description is given by way of example in conjunction with the accompanying drawings.

It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

In addition, in the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. However, the direct connection means that the two bodies are not connected to each other by the intermediate structure but connected to each other by the connecting structure to form a whole. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the utility model, as shown in fig. 1-5, an electric heating lunch box is provided, which comprises a lunch box body 1 and a handle 2 rotatably connected with the lunch box body 1, wherein the handle 2 can rotate between a placing position and a carrying position, when the handle 2 rotates to the placing position, the handle 2 rotates to one side of the lunch box body 1, and when the handle 2 rotates to the carrying position, the handle 2 is vertical relative to the lunch box body 1; the handle 2 is provided with a first limiting structure, the lunch box body 1 is provided with a second limiting structure, and when the handle 2 rotates to a carrying position, the first limiting structure is abutted against the second limiting structure to stop the handle 2 to rotate towards a direction far away from the placing position.

The utility model discloses an electric heat lunch-box is when using, as shown in figure 1, when the electric heat lunch-box is placed to needs, can rotate handle 2 to placing the position for handle 2 is in the state of placing of falling, when needs carry and hold the electric heat lunch-box, can carry handle 2 to carrying and hold the position rotation by placing the position, so that handle 2 is the state of carrying and holding roughly vertically relatively lunch-box body 1, and at this moment, the user can carry and hold the lunch-box. Owing to set up first limit structure and second limit structure for handle 2 is carrying when holding the state, can't rotate to the direction of keeping away from the position of placing, consequently, can be carrying and holding the in-process, can restrain handle 2 relative lunch-box body 1 and rotate towards the one side of keeping away from the position of placing, and then can effectually alleviate electric heat lunch-box and be being carried the swing range and the swing frequency of holding the in-process, thereby can alleviate the food form change that leads to because of the swing of lunch-box body 1, promoted the use and experienced.

In the embodiment shown in fig. 1, the placing position of the handle 2 is approximately located on one side of the lunch box body 1, and when the handle 2 rotates to the placing position, the handle 2 is approximately in a horizontal state, so that a user can conveniently operate the lunch box body 1. This is not as the restriction of the utility model discloses, in some embodiments, when handle 2 was in the place, handle 2 can incline upwards or the slant downwardly declination towards the side of lunch-box body 1.

In the embodiment shown in fig. 1, when the handle 2 is at the carrying position, the handle 2 is vertical relative to the lunch box body 1, and at this time, the lunch box body 1 is in a natural state under the action of self weight when the lunch box body 1 is carried by the handle 2, and the vertical state between the lunch box body 1 and the handle 2 is relative, and whether a strict 90-degree included angle is formed between the handle 2 and the surface of the lunch box body 1 is not limited.

To the concrete structural style of first limit structure and second limit structure, in the embodiment shown in fig. 1, further specifically say that lunch-box body 1 sets up connecting portion 3 that has shaft hole 5, handle 2 is formed with the cooperation and inserts shaft hole 5's pivot 4, first limit structure for form in handle 2's spacing muscle 6, second limit structure for form in connecting portion 3 ends position muscle 7.

In an alternative embodiment, the hinge 4 may be provided at the connecting portion 3, and the shaft hole 5 may be provided at the handle 2, so as to realize the connection between the hinge 4 and the handle 2.

In the embodiment shown in fig. 1, the structure of the rotating shaft 4 is further optimized, specifically, the rotating shaft 4 includes a first shaft portion 401 and a second shaft portion 402 which are separated from each other, the first shaft portion 401 is formed with the limiting rib 6, the second shaft portion 402 is rotated in cooperation with the shaft hole 5, the cross section of the second shaft portion 402 is arc-shaped, and the first shaft portion 401 is formed with a reinforcing rib 403 which extends into the inner side of the second shaft portion 402.

As shown in fig. 4, the rotating shaft 4 is divided into a first shaft portion 401 and a second shaft portion 402 along one radial direction thereof, so that the rotating shaft 4 can be easily mounted in the shaft hole 5 by the relative movement of the first shaft portion 401 and the second shaft portion 402 when the rotating shaft 4 is mounted. Moreover, by arranging the second shaft portion 402 in an arc shape, the second shaft portion 402 can be matched with the shaft hole 5, so that the second shaft portion 402 has certain deformability, and the rotating shaft 4 can be more conveniently installed in the shaft hole 5. Further, the second shaft portion 402 is formed in an arc shape, and a mounting space for the rib 403 is provided, so that the first shaft portion 401 can be improved in deformation resistance by providing the rib 403 in the first shaft portion 401, and the first shaft portion 401 can be prevented from being deformed or even twisted when the stopper rib 6 abuts against the stopper rib 7.

In the embodiment shown in fig. 1, as shown in fig. 4, the rib 403 has a substantially plate-like structure extending in the radial direction of the rotation shaft 4, and the cross section between the rib 403 and the first shaft portion 401 has a substantially T-shaped structure.

From this it is difficult to see, the utility model discloses a with pivot 4 after optimizing as shown in the figure, reduced the degree of difficulty of shaft hole 5 of packing into pivot 4 promptly, still improved the structural strength of 6 departments of spacing muscle, kill many birds with one stone.

In the embodiment shown in fig. 1, the rotating shaft 4 is further optimized in that the distance between the outer edge of the first shaft portion 401 and the axis of the second shaft portion 402 is smaller than the radius of the shaft hole 5, so that a gap is formed between the outer surface of the first shaft portion 401 and the wall of the shaft hole 5. As shown in fig. 4, the cross-section of second axle portion 402 is excellent arc, through such setting, make pivot 4 only the laminating rotate between the pore wall of second axle portion 402 department and shaft hole 5, first axle portion 401 mainly plays the effect of fixed spacing muscle 6, thereby can be when using, first axle portion 401 need not to undertake the vertical component force of lunch-box body 1 transmission, only need undertake the circumferential force that produces between spacing muscle 6 and the position-stopping muscle 7, the load of first axle portion 401 has been reduced, can prevent the damage of first axle portion 401 because of the too big result in of load. In the embodiment shown in fig. 1, since the first shaft portion 401 is provided with the reinforcing ribs 403, the first shaft portion 401 has a small radial deformability, and by providing a gap between the outer surface of the first shaft portion 401 and the hole wall, when the rotating shaft 4 is inserted into the shaft hole 5, the second shaft portion 402 is deformed to complete the installation, and the installation can be completed without deforming the first shaft portion 401, which is more convenient.

In the embodiment shown in fig. 1, the second shaft portion 402 is further optimized to be in interference contact with the hole wall of the shaft hole 5, so that the relative shaking between the shaft 4 and the shaft hole 5 can be prevented, and the use texture is improved. Furthermore, the utility model discloses in, divide into first axle portion 401 and second axle portion 402 of alternate segregation with pivot 4, provide the basis that second axle portion 402 can warp, can be when the pore wall interference fit of second axle portion 402 and shaft hole 5, the shaft hole 5 of packing into with pivot 4 comparatively easy.

In the embodiment shown in fig. 1, for the rotation fit between the rotating shaft 4 and the connecting portion 3, it is further optimized that the outer end of the second shaft portion 402 is formed with a buckling rib 404, and the edge of the shaft hole 5 is formed with a supporting step 8 matched with the buckling rib 404. As shown in fig. 4, the cross section of the second shaft portion 402 is arc-shaped, so that the second shaft portion 402 can contract and deform inwards, when the rotating shaft 4 is installed, the buckling rib 404 contracts inwards to enter the shaft hole 5, and then deforms after the buckling rib 404 passes through the shaft hole 5, and the buckling rib 404 is lapped on the bearing step 8, thereby realizing axial limiting of the rotating shaft 4 and the connecting portion 3.

Therefore, the utility model discloses in the structural style of pivot 4 in the embodiment of the figure, set up to mutual separation's first axial region 401 and second axial region 402 through pivot 4, can detain position muscle 404 at the integrative processing play of second axial region 402, when the installation only need with pivot 4 insert can, simple structure and easily installation.

It should be noted that the structure for axially limiting the position between the rotating shaft 4 and the connecting portion 3 of the present invention is not limited to the form shown in fig. 4 and 3, and in alternative embodiments, other forms may also be adopted, for example, a positioning hole is provided at the outer end of the rotating shaft 4, and a positioning pin capable of passing through the positioning hole is provided at the electric heating lunch box; or, the outer end of the rotating shaft 4 is provided with a positioning annular groove, and the electric heating lunch box is provided with a clamp spring which can be clamped into the positioning annular groove; or after the rotating shaft 4 passes through the shaft hole 5, the outer end of the rotating shaft 4 is subjected to hot melting deformation to form an axial limiting structure; of course, in some embodiments, it is also unnecessary to provide the axial limiting structure for the connecting portion 3 on the rotating shaft 4, and at this time, the rotating shaft 4 can be directly passed through the shaft hole 5, and by improving the strength of the handle 2, the ability of the handle 2 to deform laterally at the rotating shaft 4 is reduced, so as to prevent the rotating shaft 4 from coming out of the shaft hole 5.

For the structural form of the rotating shaft 4, the illustrated embodiment is only an optimization of some embodiments of the present invention, and does not limit the present invention to the structural form of the rotating shaft 4. In an alternative implementation, the integrated shaft 4 can be directly used, in which case the limiting rib 6 can be disposed on the side of the shaft 4, or the limiting rib 6 can be separately fixed to the handle 2.

In the embodiment shown in fig. 1, there is a gap between the outer surface of the first shaft portion 401 and the hole wall of the shaft hole 5, which is not a limitation to the structure of the first shaft portion 401, and in an alternative embodiment, the outer surface of the first shaft portion 401 may be arranged to be on the same circumference as the outer surface of the second shaft portion 402.

In the embodiment shown in fig. 1, a further optimization is that the connecting portion 3 is rotatably connected to the lunch box body 1, the connecting portion 3 is provided with a third limiting structure, the lunch box body 1 is provided with a fourth limiting structure, and when the connecting portion 3 is rotated to be vertical, the fourth limiting structure is abutted against the third limiting structure to stop the connecting portion 3 from rotating in a direction away from the placement position.

As shown in fig. 1 and 2, through such setting, rotate to carrying the position at handle 2, connecting portion 3 rotates to vertical time, handle 2 is in vertical state, and at this moment, the space is great between the top of handle 2 and the top of lunch-box body 1, and convenient to use person carries and holds, and, when connecting portion 3 is vertical, because butt between third limit structure and the fourth limit structure, at this moment, can prevent connecting portion 3 from rotating to the direction of keeping away from the side of placing, consequently, can reduce rocking of handle 2. When the handle 2 is rotated to the placing position,

connecting portion 3 if rotate to the position of placing this moment, handle 2 can rotate by connecting portion 3 relatively for the outer end of handle 2 can rotate downwards, and it is unsettled to reduce handle 2. If connecting portion 3 keeps vertical state, then, handle 2 rotates to the side of placing relative connecting portion 3, and handle 2 is horizontal ascending size less, and occupation space is less.

In the embodiment shown in fig. 1, as for the connection structure between the connecting portion 3 and the lunch box body 1, more specifically, the lunch box body 1 has a hinge hole 9, the connecting portion 3 is formed with a hinge shaft 10 that can be inserted into the hinge hole 9, and the third limiting structure is a convex rib 1001 formed on the side surface of the hinge shaft 10; hinge hole 9 is divided into first fan-shaped region 11 and second fan-shaped region 12, the radius in first fan-shaped region 11 is greater than the radius in second fan-shaped region 12, articulated shaft 10 cooperation is inserted behind hinge hole 9, protruding muscle 1001 is in first fan-shaped region 11 internal rotation, just the side in first fan-shaped region 11 forms fourth limit structure.

As shown in fig. 3, insert at articulated shaft 10 the tip of lunch-box body 1 is equipped with annular spacing groove, the electric heat lunch-box has the jump ring that can block into the spacing groove, through such setting, can realize third limit structure and fourth limit structure's butt in the inner wall department of hinge hole 9, consequently need not on connecting portion 3 towards lunch-box body 1's surface, lunch-box body 1 sets up the space towards the surperficial reservation of connecting portion 3, consequently, can make connecting portion 3 draw close with lunch-box body 1's surface, the laminating, the processing degree of difficulty to lunch-box body 1 has been reduced.

In the embodiment shown in fig. 1, a further optimization point is that the lunch box body 1 includes a box body 101 and a cover 102 buckled on the top of the box body 101, the connecting part 3 is rotatably connected with the box body 101, and the connecting part 3 is formed with a locking structure, and when the connecting part 3 is rotated to be vertical, the locking structure presses the cover 102 against the box body 101. As shown in fig. 2, the connecting portion 3 can function as a locking cover 102, and a locking structure is not required to be separately provided on the box body 101, thereby simplifying the structure of the lunch box body 1. Moreover, the locking structure can be tightly abutted against the cover body 102 to provide abutting force for the connecting part 3, so that the connecting part 3 is prevented from rotating randomly, and the stability of the handle 2 can be further maintained when the lunch box body 1 is carried.

As to the specific form of the locking structure, in the illustrated embodiment, more specifically, the cover body 102 is formed with a convex locking rib 103, and the locking structure is a locking projection 13 formed on the connecting portion 3. As shown in the figure, the cover body 102 is provided with the locking rib plate 103, when the connecting part 3 rotates, the locking lug 13 rotates to the upper side of the locking rib plate 103 to press the cover body 102 tightly, and when the cover body 102 needs to be taken down, a user can hold the locking rib plate 103 for operation, which is more convenient.

It should be noted that, in the embodiment shown in fig. 1, two locking rib plates 103 are provided, two connecting portions 3 are respectively provided with a locking protrusion 13, which is not a limitation of the present invention, in an alternative embodiment, only one locking rib plate 103 may be provided, only one connecting portion 3 with a locking protrusion 13 is provided, an insertion structure may be further provided between the cover 102 and the box body 101, for example, a transverse insertion rib is provided at an end of the cover 102 away from the locking rib plate 103, an insertion groove is provided at a corresponding position of the box body 101, when the cover 102 is fastened to the box body 101, the insertion rib is inserted into the insertion groove first, at this time, the locking rib plate 103 is only required to be pressed against the box body 101, and the pressing locking between the box body 101 and the cover 102 can be achieved.

In the embodiment shown in fig. 1, the connection portion 3 and the lunch box body 1 are connected by rotation, which is not a limitation of the present invention, and in an alternative embodiment, the connection portion 3 can be set to be integrated with the lunch box body 1, specifically, the side wall of the lunch box body 1 can be directly set to be the connection portion 3, and the handle 2 is directly connected to the side wall of the lunch box body 1 by rotation. At this time, the rotation connection structure between the handle 2 and the connection part 3 may be a connection structure between the rotation shaft 4 and the rotation shaft 4 hole in the embodiment shown in fig. 1, or a connection structure between the hinge shaft 10 and the hinge hole 9 in the embodiment shown in fig. 1.

In the drawings, the inner container of the case is not shown for better illustration of the structure.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. 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. An electric heating lunch box comprises a lunch box body and a handle rotationally connected with the lunch box body, and is characterized in that the handle can rotate between a placing position and a carrying position, when the handle rotates to the placing position, the handle rotates to one side of the lunch box body, and when the handle rotates to the carrying position, the handle is vertical relative to the lunch box body; the handle is provided with a first limiting structure, the lunch box body is provided with a second limiting structure, and when the handle rotates to a carrying position, the first limiting structure is abutted against the second limiting structure to stop the handle to rotate towards a direction far away from the placing position.

2. An electrothermal lunch box according to claim 1, wherein the lunch box body is provided with a connecting part having an axial hole, the handle is formed with a rotating shaft which is fitted into the axial hole, the first limit structure is a limit rib formed on the handle, and the second limit structure is a stop rib formed on the connecting part.

3. An electric heating lunch box as claimed in claim 2, wherein the rotating shaft comprises a first shaft part and a second shaft part which are separated from each other, the limiting ribs are formed on the side surface of the first shaft part, the second shaft part is matched with the shaft hole to rotate, the cross section of the second shaft part is arc-shaped, and the reinforcing ribs extending into the inner side of the second shaft part are formed on the first shaft part.

4. An electrically heated lunch box according to claim 3 wherein the distance between the outer edge of the first shaft portion and the axis of the second shaft portion is less than the radius of the shaft hole so that there is a gap between the outer surface of the first shaft portion and the wall of the shaft hole.

5. The electric lunch box according to claim 3, wherein the second shaft portion is in interference abutment with a wall of the shaft hole.

6. An electrothermal lunch box according to claim 3, wherein the second shaft part is formed at its outer end with a retaining rib, and the edge of the shaft hole is formed with a supporting step which engages with the retaining rib.

7. An electrothermal canteen according to claim 2, wherein the connecting portion is rotatably connected to the canteen body and has a third limiting structure, and the canteen body has a fourth limiting structure, such that when the connecting portion is rotated to be vertical, the fourth limiting structure abuts against the third limiting structure to stop the connecting portion from rotating in a direction away from the placement position.

8. An electrothermal canteen according to claim 7, wherein the canteen body has a hinge hole, the connecting portion is formed with a hinge shaft that can be inserted into the hinge hole, and the third limiting structure is a rib formed on a side surface of the hinge shaft;

the hinge hole is divided into a first sector area and a second sector area, the radius of the first sector area is larger than that of the second sector area, the hinge shaft is inserted in a matched mode into the hinge hole, the convex rib rotates in the first sector area, and the side edge of the first sector area forms the fourth limiting structure.

9. The electric heating lunch box of claim 7, wherein the lunch box body comprises a box body and a cover body buckled on the top of the box body, the connecting part is rotatably connected with the box body, a locking structure is formed on the connecting part, and when the connecting part rotates to be vertical, the locking structure presses the cover body against the box body.

10. An electrothermal canteen according to claim 9, wherein the cover is formed with a convex locking rib, and the locking structure is a locking projection formed on the connecting portion.