Self-heating device

Abstract

The utility model relates to a kind of self-heating device, including hollow base, rotating seat, heating bag septum and water septum, the hollow base is built-in support ring, the support ring is divided into rotating seat containing cavity and heating bag containing cavity by hollow base, the rotating seat containing cavity is located above heating bag containing cavity;The rotating seat is placed in rotating seat containing cavity in rotating mode, the heating cavity is located above heating bag containing cavity, the first bayonet penetrates top opening into chamber, and the tip of first bayonet is lower than heating bag septum, the second bayonet is towards rotating seat and is located at the lowest point of chute outer close to chute, and the tip of second bayonet is lower than water septum at the lowest point of chute.The rotating starting mechanism is used, instead of traditional pressing or extruding mode, significantly reduce the dependence on user hand strength, operation is more relaxed, especially suitable for user with less hand strength, improve the universality and use convenience.

Description

Technical Field

[0001] This utility model relates to a self-heating device. Background Technology

[0002] In existing technologies, common self-heating containers (such as self-heating lunch boxes and self-heating beverage cups) typically consist of two layers: an inner layer for holding the food or beverage to be heated, and an outer layer containing a chemical reaction heating pack and a water storage chamber. To initiate the heating process, the user needs to puncture the water membrane by pressing, twisting, or squeezing, allowing the water to fully contact the heating pack and release heat to heat the food or beverage inside. The typical structure and its shortcomings are mainly reflected in the following aspects:

[0003] Most existing self-heating lunch boxes use a "press" or "squeeze" operation, requiring users to press hard on the outer shell or the raised structure at the bottom to puncture the diaphragm. On the one hand, different users have varying hand strength, which can easily lead to incomplete pressing and incomplete rupture of the diaphragm, affecting heating efficiency; on the other hand, excessive pressing may damage the container structure, causing water or reaction products to leak, posing a safety hazard.

[0004] Because a large amount of heat is generated instantly when water comes into contact with a chemical heating pack (such as a calcium carbonate-quicklime system), if the diaphragm breaks too quickly or in an improper location, the heat may be released in a concentrated manner, causing local overheating or the inner wall of the container to be subjected to excessively high temperatures, which may result in burns. Conversely, if the area of ​​the broken membrane is too small, the heating will be insufficient, the food will be heated unevenly, or the heating time will be prolonged, affecting the user experience. Utility Model Content

[0005] The purpose of this invention is to provide a self-heating device that can pierce the heating pack diaphragm and water diaphragm with just a rotational motion, and complete the contact between water and the heating pack. It is simple to operate and labor-saving.

[0006] The purpose of this utility model is achieved as follows:

[0007] A self-heating device includes a hollow base, a rotating seat, a heating pack diaphragm, and a water diaphragm. The hollow base has a built-in support ring that divides the hollow base into a rotating seat cavity and a heating pack cavity. The rotating seat cavity is located above the heating pack cavity.

[0008] The supporting ring is provided with at least one second bayonet, and the inner side wall of the heating pack receiving cavity is provided with at least one chamber with a top opening and the side wall can be cut by the bayonet. The heating pack diaphragm is provided on the supporting ring, and the heating pack diaphragm closes the heating pack receiving cavity. The bottom of the chamber is lower than the heating pack diaphragm, and the top of the chamber extends out of the heating pack diaphragm.

[0009] The rotating seat is provided with a heating chamber. The bottom of the rotating seat is provided with at least one inclined groove with a bottom opening and at least one first bayonet around the heating chamber. The inclined groove is provided with a water receiving chamber communicating with the bottom opening. The water diaphragm is provided at the bottom opening and closes the water receiving chamber.

[0010] The rotating seat is rotatably placed inside the rotating seat receiving cavity. The heating chamber is located above the heating pack receiving cavity. The first bayonet enters the chamber through the top opening, and the tip of the first bayonet is lower than the heating pack diaphragm. The second bayonet faces the rotating seat and is located outside the inclined groove near the lowest point of the inclined groove, and the tip of the second bayonet is lower than the water diaphragm located at the lowest point of the inclined groove.

[0011] The rotary start mechanism replaces the traditional pressing or squeezing method, significantly reducing the reliance on the user's hand strength, making operation easier, especially suitable for users with less hand strength, and improving universality and ease of use.

[0012] The first bayonet is cleverly concealed in a closed chamber and can only be activated by rotating the rotating base, effectively preventing accidental heating during transportation or misoperation, thus improving safety and product reliability.

[0013] The inclined groove structure is linked with the second bayonet. As the water diaphragm rotates, it is guided by the inclined groove, gradually applying pressure until the water diaphragm is punctured. Because the water diaphragm itself is very tough and difficult to puncture in one go, this "progressive membrane cutting" method is not only more labor-saving, but also effectively avoids problems such as bayonet slippage and membrane cutting failure, improving operational stability and reliability.

[0014] Meanwhile, the rotating seat does not experience any height change during rotation, unlike the traditional "bottle cap" design, making the film cutting process smoother and eliminating the need for additional pressure. This design ensures a controllable water release process, avoiding violent reactions and localized overheating, and improving heating efficiency and uniformity.

[0015] The overall structure enables heating activation through a single rotation, making it simple, safe, and labor-saving to operate. It is especially suitable for outdoor and emergency scenarios, and represents an effective upgrade to existing self-heating technologies.

[0016] The objective of this utility model can also be achieved by the following technical measures:

[0017] Furthermore, the rotating seat is provided with two inclined grooves, and a notch is provided between the inclined grooves, with the first bayonet positioned at the notch.

[0018] By setting two inclined grooves and placing a notch between them, clear functional zones can be formed, optimizing the internal layout of the rotating seat. The first bayonet is placed at the notch, so that it is located in the transition position between the two inclined grooves during rotation, which does not affect the water guiding function of the inclined grooves and allows for precise control of the piercing position.

[0019] Furthermore, the lowest point of the first inclined groove and the highest point of the second inclined groove are adjacent to each other, and a gap is provided between the lowest point of the first inclined groove and the highest point of the second inclined groove.

[0020] When the rotating seat rotates in the specified direction, the second piercing gradually rises from the lowest point to the highest point along the inclined groove, forming a continuous and gradually increasing squeezing force, realizing the gradual puncture of the water diaphragm, making the membrane cutting smoother, less labor-intensive, and safer.

[0021] Furthermore, by incorporating two inclined grooves and corresponding second blades, two water membranes can be acted upon simultaneously, achieving a dual-point membrane-cutting design. This allows the water in the water-containing chamber to be released rapidly and fully, reacting quickly with the heating pack, significantly accelerating the heating start-up speed and improving heating efficiency and temperature uniformity. This design not only enhances the heating response speed but also strengthens the overall reliability and practicality of the device, making it particularly suitable for outdoor or emergency scenarios where high heating time is required.

[0022] Furthermore, the supporting ring is provided with the second bayonet at the notch position, and the inner wall of the heating package cavity is provided with the cavity at the notch position.

[0023] In the initial state, the first bayonet does not contact the heating pack diaphragm, and the second bayonet does not contact the water diaphragm, thus ensuring that even if the device is subjected to external pressure during transportation, storage, or user misoperation, the diaphragm will not be prematurely punctured, avoiding accidental triggering of the heating reaction.

[0024] This design significantly enhances the safety and protection of the self-heating device, effectively preventing dangerous situations such as high temperature, high pressure, or leakage caused by accidental pressure contact between water and the heating pack. Through a clear activation mechanism, the bayonet only gradually engages in operation when the user actively rotates it, ensuring high stability and safety of the entire machine when not in use, thus improving user confidence and experience.

[0025] Furthermore, the outer wall of the rotating seat is provided with a sliding ring and a sliding point, and the inner wall of the rotating seat cavity is provided with an upper sliding ring groove, a positioning vertical groove and a lower sliding ring groove, and the upper sliding ring groove, the positioning vertical groove and the lower sliding ring groove are connected.

[0026] The sliding point passes through the positioning vertical groove and enters the sliding ring groove, while the sliding ring enters the upper sliding ring groove, realizing the rotatable connection between the rotating seat and the hollow base;

[0027] The sliding annular groove limits the sliding distance of the sliding point, thereby limiting the rotation angle of the rotating seat to less than 180 degrees.

[0028] Furthermore, by setting a sliding ring and a sliding point on the outer wall of the rotating seat, and setting a connected upper sliding ring groove, a positioning vertical groove and a lower sliding ring groove on the inner wall of the rotating seat cavity, a stable and reliable rotational connection between the rotating seat and the hollow base can be achieved.

[0029] The sliding point passes through the positioning vertical groove and enters the sliding ring groove, while the sliding ring is embedded in the upper sliding ring groove, so that the rotating seat always remains horizontal during the rotation process, avoiding height changes and thus ensuring the stability of the rotation.

[0030] The sliding annular groove precisely controls the rotation angle of the rotating seat to no more than 180° by limiting the sliding distance of the sliding point. This angle control not only simplifies user operation, ensuring that the two water diaphragms and the two heating pack diaphragms can be cut simultaneously within half a turn, but also avoids misoperation or structural interference caused by excessive rotation, making the heating start-up process simpler and less labor-intensive.

[0031] Furthermore, the heating chamber is a hollow cavity that runs vertically through the vessel to support it.

[0032] The heating chamber is a hollow cavity that runs vertically through the interior and exterior, designed to directly support vessels (such as soup bowls). When the product leaves the factory, the assembly personnel have already placed the soup bowl with soup inside the hollow cavity. After the user purchases the product, the user starts the device, and heat is released from the heating pack and directly transferred to the bottom and surrounding area of ​​the heating chamber. The heat is evenly transferred to the bottom of the vessel, thereby heating the soup inside the vessel.

[0033] The heat transfer path is short and efficient, avoiding heat loss and ensuring that food is heated faster and more evenly.

[0034] Furthermore, the outer wall of the rotating base is provided with an outer ring body that facilitates rotation by the user, and the outer ring body abuts against the top opening of the hollow base.

[0035] The outer wall of the rotating base features an outer ring for easy operation. This ring is located at the top opening of the hollow base, forming a clear grip area that makes it easier for users to apply force when rotating to start the heating. Compared to the main rotating base, the outer ring offers a larger operating interface and better anti-slip properties, making it particularly suitable for use when hand strength is insufficient or in complex environments (such as when wearing gloves or in a damp environment), significantly improving ease of operation and comfort.

[0036] Furthermore, it also includes an upper cover, the rotating seat is located on the side wall above the outer ring body to form an insertion part, the upper cover abuts against the outer ring body to seal the heating cavity, the insertion part is inserted into the inner cavity of the upper cover, and the insertion part and the inner cavity of the upper cover fit together tightly.

[0037] After the introduction of the top cover structure, the upper part of the rotating seat is provided with an insertion part, which can be tightly embedded in the inner cavity of the top cover and supported by the outer ring body, thus playing an effective sealing role. This structure not only prevents steam or heat from leaking out during the heating process, but also enhances the safety and thermal efficiency of use.

[0038] Furthermore, the chamber is a plastic chamber that can be cut open with a bayonet.

[0039] The chamber, made of plastic, has good toughness and controllable cutting properties, ensuring effective breakage during the first bayonet cut and remaining intact during transportation, storage, or slight compression, thus enhancing safety.

[0040] Furthermore, the inclination of the inclined groove is 2 degrees.

[0041] The chute is set with a gentle 2-degree inclination angle, creating a path of gradual height change. This facilitates the gradual contact and compression of the second piercing blade by the water diaphragm during rotation, thus completing the "progressive film cutting". This angle design balances film cutting efficiency and controllability, providing sufficient piercing force while avoiding excessive piercing or high operating resistance due to an excessively large angle, thereby improving the labor-saving operation of the machine and the stability of the film cutting process.

[0042] The beneficial effects of this utility model are as follows:

[0043] In this invention, the first bayonet is housed in a sealed chamber, which is only opened when the user actively rotates the rotating seat and applies a certain force. This effectively prevents accidental activation of the heating process due to external pressure, drops, or accidental contact during transportation, storage, or daily use. In the initial state, the first bayonet remains separated from the heating pack diaphragm, and the second bayonet remains separated from the water diaphragm, greatly improving the safety and reliability of the device when not in use.

[0044] This invention, by placing a water diaphragm at the bottom of an inclined trough, utilizes the synchronous rotation of the trough and the rotating base, along with the gradually rising structure of the trough, to allow the water diaphragm to automatically rise during rotation and contact with the second blade, ultimately being progressively cut open. Users only need to rotate the rotating base to start the system, completely eliminating the need for manual downward pressure, thus achieving a labor-saving and convenient operating experience.

[0045] In this invention, the rotating seat forms a limiting fit with the sliding point, the sliding ring and the groove structure inside the base (including the upper and lower sliding ring grooves and the vertical positioning groove), which structurally limits the rotation angle to less than 180 degrees, ensuring that the film cutting process is controllable and avoiding damage, miscutting or safety hazards caused by excessive rotation.

[0046] In this invention, the rotating seat rotates in a horizontal plane without moving up or down, maintaining a stable height. Even if the inclined groove causes the water diaphragm to rise during rotation, it does not affect the overall height of the rotating seat, ensuring smooth and stable operation.

[0047] This invention allows users to simultaneously cut the heating pack diaphragm and water diaphragm by simply rotating the rotating base, thus initiating the self-heating reaction. Heat is rapidly transferred through the heating chamber to the bottom of the vessel, achieving uniform heating. The entire process is efficient, safe, and provides an excellent user experience, making it particularly suitable for portable food heating scenarios. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of a self-heating device.

[0049] Figure 2 A cross-sectional view of the self-heating device (with a soup bowl).

[0050] Figure 3 This is an assembly diagram of a self-heating device (with a soup bowl).

[0051] Figure 4 This is a cross-sectional view of the self-heating device (without the soup bowl, and the rotating seat in its initial state).

[0052] Figure 5 for Figure 4 Enlarged view of part A.

[0053] Figure 6 This is a cross-sectional view of the self-heating device (without the soup bowl, and the rotating base rotated at a certain angle).

[0054] Figure 7 for Figure 6 Enlarged view of part B.

[0055] Figure 8 Another sectional view of the self-heating device (without the soup bowl).

[0056] Figure 9 Another sectional view of the self-heating device (without the soup bowl).

[0057] Figure 10 This is an assembly diagram of a self-heating device (excluding the soup bowl).

[0058] Figure 11 This is another assembly view of the self-heating device (without the soup bowl).

[0059] Figure 12 This is a schematic diagram of the rotating base.

[0060] Figure 13 This is a schematic diagram of another angle of the swivel seat.

[0061] Figure 14 This is a schematic diagram of another angle of the rotating seat (with a water diaphragm).

[0062] Figure 15 This is a schematic diagram of a hollow base.

[0063] Figure 16 This is a schematic diagram of the hollow base from another angle (with heating pack diaphragm). Detailed Implementation

[0064] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0065] Implementation examples, in conjunction with Figures 1 to 16 As shown, a self-heating device includes a hollow base 1, a rotating seat 2, a heating pack diaphragm 3, and a water diaphragm 4. The hollow base 1 has a built-in support ring 5, which divides the hollow base 1 into a rotating seat cavity 11 and a heating pack cavity 12. The rotating seat cavity 11 is located above the heating pack cavity 12.

[0066] The supporting ring 5 is provided with at least one second bayonet 6, the inner side wall of the heating pack receiving cavity 12 is provided with at least one chamber 7 with a top opening and the side wall can be cut by the bayonet, the heating pack diaphragm 3 is provided on the supporting ring 5, the heating pack diaphragm 3 closes the heating pack receiving cavity 12, the bottom of the chamber 7 is lower than the heating pack diaphragm 3, and the top of the chamber 7 extends out of the heating pack diaphragm 3;

[0067] The rotating seat 2 is provided with a heating chamber 21. The bottom of the rotating seat 2 is provided with at least one inclined groove 8 with a bottom opening and at least one first bayonet 9 around the heating chamber 21. The inclined groove 8 is provided with a water receiving chamber 81 communicating with the bottom opening. The water diaphragm 4 is provided at the bottom opening and closes the water receiving chamber 81.

[0068] The rotating seat 2 is rotatably placed inside the rotating seat receiving cavity 11. The heating cavity 21 is located above the heating pack receiving cavity 12. The first bayonet 9 enters the cavity 7 through the top opening, and the tip of the first bayonet 9 is lower than the heating pack diaphragm 3. The second bayonet 6 faces the rotating seat 2 and is located outside the inclined groove 8 near the lowest point of the inclined groove 8, and the tip of the second bayonet 6 is lower than the water diaphragm 4 located at the lowest point of the inclined groove 8.

[0069] Furthermore, the rotating seat 2 is provided with two inclined grooves 8, and the rotating seat 2 is provided with a notch 10 between the inclined grooves 8, and the first bayonet 9 is provided at the notch 10.

[0070] Furthermore, the lowest point of the first inclined groove 8 and the highest point of the second inclined groove 8 are adjacent to each other, and the gap 10 is provided between the lowest point of the first inclined groove 8 and the highest point of the second inclined groove 8.

[0071] Furthermore, the supporting ring 5 is provided with the second bayonet 6 at the position corresponding to the notch 10, and the inner wall of the heating package cavity 12 is provided with the cavity 7 at the position corresponding to the notch 10.

[0072] Furthermore, the outer wall of the rotating seat 2 is provided with a sliding ring 22 and a sliding point 23, and the inner wall of the rotating seat cavity 11 is provided with an upper sliding ring groove 111, a positioning vertical groove 112 and a lower sliding ring groove 113, and the upper sliding ring groove 111, the positioning vertical groove 112 and the lower sliding ring groove 113 are connected.

[0073] The sliding point 23 passes through the positioning vertical groove 112 and enters the sliding ring groove 113, while the sliding ring 22 enters the upper sliding ring groove 111, realizing the rotatable connection between the rotating seat 2 and the hollow base 1.

[0074] The sliding annular groove 113 restricts the sliding distance of the sliding point 23, thereby limiting the rotation angle of the rotating seat 2 to less than 180 degrees.

[0075] Furthermore, the heating cavity 21 is a hollow cavity that runs vertically through the vessel to support it.

[0076] Furthermore, the outer wall of the rotating base 2 is provided with an outer ring 24 that facilitates rotation by the user, and the outer ring 24 abuts against the top opening of the hollow base 1.

[0077] Furthermore, it also includes an upper cover 100, the side wall of the rotating seat 2 located above the outer ring body 24 forming an insertion part 25, the upper cover 100 abuts against the outer ring body 24 to seal the heating cavity 21, the insertion part 25 is inserted into the inner cavity of the upper cover 100, and the insertion part 25 and the inner cavity of the upper cover 100 are tightly fitted together.

[0078] Furthermore, the chamber 7 is a plastic chamber that can be cut open with a bayonet.

[0079] Furthermore, the inclination of the inclined groove 8 is 2 degrees.

[0080] Furthermore, the heating pack diaphragm 3 is an aluminum foil film.

[0081] By placing the first bayonet 9 inside the closed chamber 7, and ensuring that the chamber 7 is only cut open by the first bayonet 9 when the rotating seat 2 is subjected to a certain rotational force, the heating start-up caused by external pressure or accidental contact with the rotating seat 2 during transportation or daily use is effectively prevented.

[0082] In the initial state, the first bayonet 9 and the heating pack diaphragm 3, and the second bayonet 6 and the water diaphragm 4 are all kept separate, ensuring that even if subjected to external pressure during transportation, storage or misoperation, the heating pack diaphragm 3 and the water diaphragm 4 will not be punctured prematurely, thus avoiding accidental triggering of the heating reaction.

[0083] The rotating seat 2 achieves a limiting fit through the sliding ring 22 and sliding point 23 set on its outer wall, and the upper sliding ring groove 111, positioning vertical groove 112 and lower sliding ring groove 113 that match the inner wall of the base. This structure ensures that the rotating seat 2 can only rotate in the horizontal plane and cannot be displaced in the vertical direction, thereby avoiding the up and down movement or pressure requirements caused by rotation in the traditional "screw cap" structure.

[0084] Because the rotating seat 2 does not change height during rotation, it ensures that it rotates smoothly on the same horizontal plane. The inclined groove 8 rotates synchronously with the rotating seat 2 and passes along the second bayonet 6 fixed at the bottom. As the rotation proceeds, the height of the inclined groove 8 gradually increases, causing the water membrane 4 adhering to its bottom to be gradually lifted during the movement, thereby continuously applying pressure to the second bayonet 6 to achieve progressive membrane cutting. The entire process does not require the user to manually press down or apply additional force. The membrane cutting process can be driven by the rotation action alone, which is not only labor-saving and smooth, but also improves the convenience and comfort of use.

[0085] When the self-heating device leaves the factory, the assembly personnel have already placed the soup bowl 200 containing food into the through heating chamber 21. After purchasing the heating device, the user starts the heating process by rotating the rotating base 2.

[0086] First, the rotating seat 2 drives the first bayonet 9 through the chamber 7 where the heating pack diaphragm 3 is located, cutting open the heating pack diaphragm 3 to expose the heating pack; at the same time, the inclined groove 8 at the bottom of the rotating seat 2 gradually rises as it rotates, causing the water diaphragm 4 to be gradually squeezed to the second bayonet 6 on the support ring 5. Under the gradually increasing squeezing force, the second bayonet 6 slowly pierces the water diaphragm 4, releasing water flow to react with the heating pack and generate heat.

[0087] The heat is conducted through the heating chamber 12 to the heating chamber 21, and the soup bowl 200 and food inside the heating chamber 21 are heated accordingly.

[0088] Throughout the process, the rotation angle of the rotating seat 2 is limited and there is no change in height, making operation smooth and effortless. This avoids the reliance on hand strength required for traditional press-type start-up, and also effectively prevents misoperation and concentrated heat release, ensuring the safety and efficiency of the heating process and optimizing the user experience.

Claims

1. A self-heating device, comprising a hollow base, a rotating seat, a heating pack diaphragm, and a water diaphragm, characterized in that: The hollow base has a built-in support ring, which divides the hollow base into a rotating seat cavity and a heating pack cavity, with the rotating seat cavity located above the heating pack cavity. The supporting ring is provided with at least one second bayonet, and the inner side wall of the heating pack receiving cavity is provided with at least one chamber with a top opening and the side wall can be cut by the bayonet. The heating pack diaphragm is provided on the supporting ring, and the heating pack diaphragm closes the heating pack receiving cavity. The bottom of the chamber is lower than the heating pack diaphragm, and the top of the chamber extends out of the heating pack diaphragm. The rotating seat is provided with a heating chamber. The bottom of the rotating seat is provided with at least one inclined groove with a bottom opening and at least one first bayonet around the heating chamber. The inclined groove is provided with a water receiving chamber communicating with the bottom opening. The water diaphragm is provided at the bottom opening and closes the water receiving chamber. The rotating seat is rotatably placed inside the rotating seat receiving cavity. The heating chamber is located above the heating pack receiving cavity. The first bayonet enters the chamber through the top opening, and the tip of the first bayonet is lower than the heating pack diaphragm. The second bayonet faces the rotating seat and is located outside the inclined groove near the lowest point of the inclined groove, and the tip of the second bayonet is lower than the water diaphragm located at the lowest point of the inclined groove.

2. The self-heating device according to claim 1, characterized in that: The rotating seat is provided with two inclined grooves, and a notch is provided between the inclined grooves, with the first bayonet positioned at the notch.

3. The self-heating device according to claim 2, characterized in that: The lowest point of the first inclined groove is adjacent to the highest point of the second inclined groove, the highest point of the first inclined groove is adjacent to the lowest point of the second inclined groove, and the notch is provided between the lowest point of the first inclined groove and the highest point of the second inclined groove.

4. The self-heating device according to claim 2, characterized in that: The second bayonet is provided at the notch position corresponding to the support ring, and the chamber is provided at the notch position on the inner side wall of the heating pack cavity.

5. The self-heating device according to claim 1, characterized in that: The outer wall of the rotating seat is provided with a sliding ring and a sliding point, and the inner wall of the rotating seat cavity is provided with an upper sliding ring groove, a positioning vertical groove and a lower sliding ring groove, which are connected to each other. The sliding point passes through the positioning vertical groove and enters the sliding ring groove, while the sliding ring enters the upper sliding ring groove, realizing the rotatable connection between the rotating seat and the hollow base; The sliding annular groove limits the sliding distance of the sliding point, thereby limiting the rotation angle of the rotating seat to less than 180 degrees.

6. The self-heating device according to claim 1, characterized in that: The heating chamber is a hollow cavity that runs vertically through the vessel to support it.

7. The self-heating device according to claim 1, characterized in that: The outer wall of the rotating base is provided with an outer ring body that facilitates rotation by the user, and the outer ring body abuts against the top opening of the hollow base.

8. The self-heating device according to claim 7, characterized in that: It also includes an upper cover, the rotating seat is located on the side wall above the outer ring body to form an insertion part, the upper cover abuts against the outer ring body to seal the heating cavity, the insertion part is inserted into the inner cavity of the upper cover, and the insertion part and the inner cavity of the upper cover are tightly fitted together.

9. The self-heating device according to claim 1, characterized in that: The chamber is a plastic chamber that can be cut open with a bayonet.

10. The self-heating device according to any one of claims 1-9, characterized in that: The inclination of the sloping groove is 2 degrees.

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