Self-heating device and cup body thereof

Abstract

The utility model provides a self-heating device and a cup body thereof, and belongs to the technical field of heating devices which generate heat through exothermic reaction. A supporting structure used for supporting a to-be-heated tank is arranged on the inner wall of the cup body, the supporting structure comprises a supporting part used for making contact with the to-be-heated tank and playing a supporting role, and a limiting structure used for limiting horizontal movement of the to-be-heated tank is further arranged on the inner wall of the cup body. The limiting structure comprises a limiting part which is in contact with the side part of the tank body to be heated and plays a limiting role. According to the utility model, the tank body to be heated can be prevented from moving horizontally, so that the problems of abnormal sound and even breakage of the tank body caused by moving of the tank body to be heated in the transportation and moving processes are solved, and meanwhile, the problem of poor use experience caused by moving of the tank body in the use process after heating is completed can be solved.

Description

Technical Field

[0001] The utility model relates to a self-heating device and a cup body thereof, belonging to the technical field of heating devices that generate heat by exothermic reactions. Background Art

[0002] In daily life, when people need to consume hot canned foods (such as beverages, eight-treasure porridge, etc.), they usually use a heating container to heat the canned foods. However, the heating container generally requires electricity or an open flame. In places where electricity and open flames are not convenient, a self-heating device is needed.

[0003] For example, a side-opening inner-ring-supported self-heating container (i.e., a self-heating device) disclosed in a Chinese utility model patent with the authorization announcement number CN205381567U includes an outer tank body (i.e., a cup body) and a cover body. A ring-shaped support platform is provided on the inner wall of the cup body. An inner tank body (i.e., a tank body to be heated, such as canned foods like beverages, eight-treasure porridge, etc.) is arranged inside the cup body, and the inner tank body is supported on the ring-shaped support platform. At the bottom inside the cup body, there is an easy-pull water bag and a self-heating pack. One end of the pull rope of the easy-pull water bag is fixed on the water bag body, and the other end extends out of the cup body through the pull rope opening on the side wall of the cup body. When in use, the pull rope is pulled to open the easy-pull water bag, and the water in the water bag reacts with the substances in the self-heating pack, and the generated heat can heat the food in the inner tank body.

[0004] The above self-heating device only uses the ring-shaped support platform on the inner wall of the cup body to support the bottom of the tank body to be heated, and there is a gap between the tank body to be heated and the inner wall of the cup body. In the prior art, there is also a case where the ring-shaped support platform at the top end of the inner wall of the cup body is used to support the outward-turned edge at the top end of the tank body to be heated, and there is a gap between the tank body to be heated and the inner hole wall of the ring-shaped support platform. As a result, during transportation and movement, the tank body to be heated is prone to horizontal movement, causing abnormal noises, and if the tank body is made of glass, there is also a greater risk of breakage. In addition, the ring-shaped support platform that supports the bottom of the tank body to be heated completely blocks the upper and lower spaces. The hot air flow generated by the reaction of the self-heating pack can only heat the bottom of the inner tank body, and the heating efficiency is low. Moreover, a large amount of hot air flow is generated instantaneously when the self-heating pack reacts, and a large amount of hot air flow accumulates in the closed space below the inner tank body, which is likely to burst the cup body or push open the inner tank body, posing a safety hazard. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a cup body of a self-heating device to solve the problem that the cup body in the prior art cannot horizontally limit the tank body to be heated, resulting in horizontal movement of the tank body to be heated during transportation and movement, causing abnormal noises or even breakage of the tank body. Another purpose of the utility model is to provide a self-heating device including the above cup body.

[0006] To achieve the above object, the cup body of the self-heating device in the present utility model adopts the following technical solution:

[0007] A cup body of a self-heating device, on the inner wall of which there is provided a support structure for supporting the can to be heated, the support structure includes a support portion for contacting and supporting the can to be heated, and on the inner wall of the cup body there is also provided a limiting structure for restricting the horizontal movement of the can to be heated, the limiting structure includes a limiting portion for contacting and limiting the side portion of the can to be heated.

[0008] The beneficial effects of the above technical solution are as follows: The present utility model belongs to an improved invention. The improvement lies in that a limiting structure for restricting the horizontal movement of the can to be heated is also provided on the inner wall of the cup body. The limiting structure includes a limiting portion for contacting and limiting the side portion of the can to be heated. Combined with the supporting effect of the support structure, it is possible to support the can to be heated while preventing the can to be heated from moving horizontally, thereby avoiding problems such as abnormal noise or even can body breakage caused by the movement of the can to be heated during transportation and movement.

[0009] Further, the support portion is used to contact the bottom of the can to be heated, the limiting portion is located above the support portion, and a plurality of support structures and limiting structures are respectively arranged at intervals along the inner wall of the cup body. A flow space for the heating air flow to flow upward from bottom to top is formed between adjacent two support structures and between adjacent two limiting structures.

[0010] Further, the number of the support structures and the limiting structures is equal, and the limiting structures are arranged above the support structures in a one-to-one correspondence.

[0011] Further, the support structure and the limiting structure are an integral support and limit rib, and a step structure is provided at the upper end of the support and limit rib. The vertical surface in the step structure constitutes the limiting portion, and the inclined surface arranged at an angle with the vertical surface in the step structure constitutes the support portion.

[0012] Further, the inclined surface is an inclined surface with an angle greater than 90 degrees with the vertical surface, and the inclination degree of the inclined surface is adapted to the taper of the bottom cone surface of the can to be heated.

[0013] Further, the lower end of the support and limit rib extends to the bottom wall of the cup body.

[0014] Further, the upper end of the support and limit rib is located in the middle of the cup body in the height direction.

[0015] Further, the support structure is a support rib extending up and down, and a support inclined surface is provided at the upper end of the support rib, and the support inclined surface constitutes the support portion.

[0016] To achieve the above object, the self-heating device in the present utility model adopts the following technical solution:

[0017] A self-heating device includes a lower cup body and an upper cup body connected to the lower cup body. A support structure for supporting the can to be heated is provided on the inner wall of the lower cup body. The support structure includes a support portion for contacting the can to be heated and playing a supporting role. A limiting structure for restricting the horizontal movement of the can to be heated is also provided on the inner wall of the lower cup body. The limiting structure includes a limiting portion for contacting the side of the can to be heated and playing a limiting role.

[0018] The beneficial effects of the above technical solution are as follows: The utility model belongs to an improved invention. The improvement lies in that a limiting structure for restricting the horizontal movement of the can to be heated is also provided on the inner wall of the lower cup body. The limiting structure includes a limiting portion for contacting the side of the can to be heated and playing a limiting role. Combining with the supporting effect of the support structure, it can support the can to be heated while preventing the can to be heated from moving horizontally, thereby avoiding problems such as abnormal noises or even can body breakage caused by the movement of the can to be heated during transportation and movement.

[0019] Further, the support portion is used to contact the bottom of the can to be heated, and the limiting portion is located above the support portion. The support structure and the limiting structure are respectively arranged at intervals along the inner wall of the lower cup body. A flow space for the heating air flow to flow upward from bottom to top is formed between two adjacent support structures and between two adjacent limiting structures.

[0020] Further, the number of the support structure and the limiting structure is equal, and the limiting structures are arranged one by one above the support structures.

[0021] Further, the support structure and the limiting structure are an integral support and limit rib. A step structure is provided at the upper end of the support and limit rib. The vertical surface in the step structure constitutes the limiting portion, and the inclined surface arranged at an angle with the vertical surface in the step structure constitutes the support portion.

[0022] Further, the inclined surface is an inclined surface with an angle greater than 90 degrees with the vertical surface, and the inclination degree of the inclined surface is adapted to the taper of the bottom cone surface of the can to be heated.

[0023] Further, the lower end of the support and limit rib extends to the bottom wall of the lower cup body.

[0024] Further, the upper end of the support and limit rib is located in the middle of the lower cup body in the height direction.

[0025] Further, the support structure is a support rib extending up and down. A support inclined surface is provided at the upper end of the support rib. The support inclined surface constitutes the support portion.

[0026] Further, the limiting structure in the lower cup body constitutes a lower limiting structure for limiting the lower part of the tank to be heated, and an upper limiting structure for limiting the upper part of the tank to be heated is provided on the upper cup body. Description of the Drawings

[0027] Figure 1 The front perspective view of the embodiment of the self-heating device of the present utility model;

[0028] Figure 2 The top view of the lower cup body, the puncturing assembly, and the water bag in the embodiment of the self-heating device of the present utility model;

[0029] Figure 3 The perspective view (one perspective) of the lower cup body in the embodiment of the self-heating device of the present utility model;

[0030] Figure 4 The perspective view (another perspective) of the lower cup body in the embodiment of the self-heating device of the present utility model;

[0031] Figure 5 The cross-sectional view of the lower cup body in the embodiment of the self-heating device of the present utility model;

[0032] Figure 6 The cross-sectional view of the upper cup body in the embodiment of the self-heating device of the present utility model;

[0033] Figure 7 The perspective view of the puncturing body in the embodiment of the self-heating device of the present utility model;

[0034] Figure 8 The cross-sectional view of the puncturing body in the embodiment of the self-heating device of the present utility model;

[0035] Figure 9 The perspective view (one perspective) of the mounting cylinder in the embodiment of the self-heating device of the present utility model;

[0036] Figure 10 The perspective view (another perspective) of the mounting cylinder in the embodiment of the self-heating device of the present utility model. Detailed Embodiment

[0037] Aiming at the technical problems existing in the prior art, the basic technical concept of the present utility model is to add a limiting structure on the inner wall of the cup body to horizontally limit the tank to be heated and prevent its horizontal movement.

[0038] Embodiment 1 of the self-heating device in the present utility model:

[0039] Such as Figure 1 、 Figure 2As shown in the figure, the self-heating device includes an upper cup body 1, a lower cup body 2, a puncturing assembly 3, a cover body 4, a water bag 5, and a self-heating bag 6. The puncturing assembly 3 is installed on the lower cup body 2. The water bag 5 and the self-heating bag 6 are arranged inside the lower cup body 2. The self-heating bag 6 is located below the water bag 5 and the puncturing assembly 3. The upper end of the lower cup body 2 has an opening for the water bag 5 and the self-heating bag 6 to be loaded into.

[0040] The lower cup body 2 has a receiving space for receiving the can 7 to be heated. The can 7 to be heated is located above the water bag 5. The can 7 to be heated can be a beverage can or an easy-open can containing food such as eight-treasure porridge. For the self-heating device of the present utility model, it may include the can 7 to be heated inside, that is, a self-heating device directly with canned food; of course, it may also not include it. After the user purchases the self-heating device, they can, according to their own preferences, load the required canned food by themselves and use the self-heating device to heat the canned food.

[0041] In order to support the can 7 to be heated, a support structure for supporting the can 7 to be heated is provided on the inner wall of the lower cup body 2. The support structure includes a support portion for contacting the bottom of the can 7 to be heated and playing a supporting role. At the same time, a limiting structure for restricting the horizontal movement of the can 7 to be heated is also provided on the inner wall of the lower cup body 2. The limiting structure includes a limiting portion for contacting the side of the can 7 to be heated and playing a limiting role. The limiting portion is located above the support portion. In this way, when the can 7 to be heated is provided inside the lower cup body 2, not only can the can 7 to be heated be supported, but also its horizontal movement can be avoided, thereby avoiding problems such as abnormal noise or even can body breakage caused by the movement of the can 7 to be heated during transportation and movement, and also avoiding problems with poor user experience caused by the movement of the can body during the use process after heating is completed.

[0042] Further, a plurality of support structures and limiting structures are respectively arranged at intervals along the inner wall of the lower cup body 2. In this way, a flow space for the heating air flow to flow upward from bottom to top is formed between adjacent two support structures and between adjacent two limiting structures. Therefore, the hot air flow generated by the reaction of the self-heating bag 6 can not only heat the bottom of the can 7 to be heated, but also flow upward to heat the side of the can 7 to be heated, improving the heating efficiency. At the same time, a large amount of hot air flow generated instantaneously by the reaction of the self-heating bag 6 will not gather in a narrow enclosed space, avoiding the hot air flow bursting the lower cup body 2 instantaneously or flushing open the can 7 to be heated, reducing the potential safety hazard.

[0043] Further, the number of support structures and limiting structures is equal, and the limiting structures are arranged one by one above the support structures. As Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown, the support structure and the limiting structure are integrated into a support limiting rib 25, and there are four support limiting ribs 25, which are evenly arranged along the inner wall of the lower cup body 2. A step structure is provided at the upper end of each support limiting rib 25, and the vertical surface of the step structure constitutes a limiting portion 252. The angled surface arranged at an angle with the vertical surface in the step structure constitutes a support portion 251. The support portion 251 and the limiting portion 252 are both planes, and the support portions 251 of each support limiting rib 25 are of the same height. The support limiting rib can both support and limit, and has a simple structure and is easy to manufacture, and can form a more through flow space for the heating airflow to flow from bottom to top.

[0044] Furthermore, the above-mentioned angled surface is not perpendicular to the vertical surface, but is an inclined surface with an angle greater than 90 degrees with the vertical surface. The degree of inclination meets the needs of matching the taper of the bottom conical surface of the tank body 7 to be heated. This not only increases the supporting area, but also the support portion 251 itself can limit the horizontal movement of the tank body 7 to be heated, thereby further ensuring the stable support of the tank body 7 to be heated.

[0045] Furthermore, the lower end of the support and limit rib 25 extends to the bottom wall of the lower cup body 2, which ensures the structural strength of the support and limit rib 25 itself, and further ensures the support and limit effect on the heated tank body 7. At the same time, the support and limit rib 25 has a certain length, which can strengthen the structural strength of the lower cup body 2 and ensure the use effect of the lower cup body 2. The upper end of the support and limit rib 25 is located in the middle of the height direction of the lower cup body 2 and does not extend to the top of the lower cup body 2. On the one hand, it simplifies the structure. On the other hand, when the hot air flow rises to between the side wall of the heated tank body 7 and the inner wall of the lower cup body 2, it can facilitate the hot air flow to flow in the annular space, avoiding the rib protruding from the inner wall of the lower cup body 2 from affecting the smooth flow of the hot air flow.

[0046] like Figure 2 As shown, the water bag includes a box body 51 and a liquid sealed and stored in the box body 51. The box body 51 is similar to the eight-cup yogurt box in the prior art. The box body 51 itself has a certain strength and can maintain a certain shape. The opening of the box body 51 is provided with a hard sealing edge 52 extending outward, and the hard sealing edge 52 is used for heat-sealing and fixing the sealing film. In order to facilitate the installation of the water bag 5, as shown in FIG. Figures 2 to 5 As shown, two guide structures extending up and down and arranged at intervals are provided in the lower cup body 2, each guide structure includes two guide ridges provided on the inner wall of the lower cup body 2, namely, a first guide ridge 21 and a second guide ridge 22, and the two guide ridges and the inner wall of the lower cup body 2 together form a guide groove. The notches of the two guide grooves are opposite, and when the water bag 5 is loaded, the two sides of the hard sealing edge 52 extend into the guide groove respectively, which can guide the loading of the water bag 5. After being installed in place, the groove wall of the guide groove cooperates with the hard sealing edge 52 to stop and fix the water bag 5 in the lower cup body 2 to prevent the water bag 5 from moving horizontally.

[0047] At the lower ends of the two guiding ridges in each guiding structure, they are connected by a supporting ridge 23. The lower end of the supporting ridge 23 extends to the bottom wall of the lower cup body 2. The top surface of the supporting ridge 23 is located between the two guiding ridges and forms the supporting surface of the rigid sealing edge 52 of the supporting water bag. The two supporting surfaces are at the same height, which limits the extreme position of the downward installation of the water bag 5. There is a set distance between the supporting surface and the bottom wall of the lower cup body 2, and this set distance is not less than the height of the self-heating pack 6, so as to prevent the rigid sealing edge 52 of the water bag from pressing on the self-heating pack 6.

[0048] The lower cup body 2 is provided with an installation opening 26 for installing the puncturing assembly 3. The installation opening 26 corresponds to the interval between the two guiding structures, so that after the water bag 5 is installed in place, the sealing film of the water bag 5 faces the puncturing assembly 3, which is convenient for the puncturing assembly 3 to puncture the sealing film of the water bag 5. Since the lower cup body 2 is a cylindrical structure as a whole, in order to better limit the water bag 5 during the installation process and after it is installed in place, at a position on the inner wall of the lower cup body 2 opposite to the installation opening 26, there are provided limiting ridges 24 for contacting and limiting the outer side wall of the bottom of the box body 51. There are two limiting ridges 24 arranged in parallel at intervals. The limiting ridges 24 are located between two adjacent supporting and limiting ribs 25, and the installation opening 26 is located between two other adjacent supporting and limiting ribs 25.

[0049] Among the two guiding ridges in each guiding structure, the guiding ridge close to the installation opening 26, that is, the first guiding ridge 21, includes an inclined extension section 211 above and a vertical extension section 212 below, while the upper part 221 and the lower part 222 of the second guiding ridge 22 both extend vertically. In this way, the guiding groove includes a gradually changing groove width section above and an equidistant groove width section below. The groove width of the gradually changing groove width section gradually decreases from top to bottom, forming a structure similar to a flared opening, which can play a guiding role for the rigid sealing edge 52. In addition, although the upper ends of the limiting ridges 24 do not extend to the upper end surface of the lower cup body 2, guiding inclined surfaces for guiding the installation of the water bag 5 are provided on the upper parts of the limiting ridges 24. That is, the height of the limiting ridges 24 protruding from the inner wall of the lower cup body 2 is divided into two parts, the height of the upper part gradually increases from top to bottom, and the height of the lower part is equal.

[0050] The lower ends of the limiting ridges 24 also extend to the bottom wall of the lower cup body 2. When installing the self-heating pack 6, it can be directly installed to contact the bottom wall of the lower cup body 2, and the self-heating pack 6 is clamped by the supporting and limiting ribs 25, the supporting ridges 23 and the lower parts of the limiting ridges 24 to prevent the self-heating pack 6 from moving around.

[0051] Furthermore, the height by which the inclined extension section 211 and the upper part 221 protrude from the inner wall of the lower cup body 2 is less than the height by which the vertical extension section 212 and the lower part 222 protrude from the inner wall of the lower cup body 2, and the height by which the vertical extension section 212 and the lower part 222 protrude from the inner wall of the lower cup body 2 and the height by which the limiting rib 24 protrudes from the inner wall of the lower cup body 2 are both less than the height by which the supporting and limiting rib 25 protrudes from the inner wall of the lower cup body 2. On the one hand, this avoids the heated tank body 7 getting stuck between other ribs when installing the heated tank body 7 to be heated; on the other hand, after the water bag 5 is punctured, the liquid flowing out flows downward onto the self-heating pack 6 to undergo an exothermic reaction, and the generated hot gas can flow upward through the flow space between two adjacent supporting and limiting ribs 25. At the same time, the hot gas can also flow in the annulus between the heated tank body 7 and the inner wall of the lower cup body 2, and the limiting rib 24, the inclined extension section 211, and the upper part 221 with a limited size protruding from the inner wall of the lower cup body 2 do not cause great hindrance to the flow of the hot gas, ensuring the heating effect of the hot gas on the outer peripheral surface of the heated tank body 7.

[0052] It should be noted that the above-mentioned guiding ribs, supporting ribs 23, supporting and limiting ribs 25, and limiting ribs 24 can all be integrally formed with the lower cup body 2, or can be separately manufactured and then fixed on the inner wall of the lower cup body 2 by means of bonding or snap connection.

[0053] As Figure 5 shown, a first external thread 27 is provided on the outer wall of the upper end of the lower cup body 2. As Figure 6 shown, the upper cup body 1 sequentially includes a first cylindrical section 11, a frustum section 13, and a second cylindrical section 12 from top to bottom. A first internal thread 121 adapted to the first external thread 27 is provided on the inner wall of the second cylindrical section 12, facilitating the connection between the upper cup body 1 and the lower cup body 2. An exhaust hole 131 is provided on the frustum section 13, enabling the hot gas flowing upward to be discharged, avoiding explosion caused by excessive hot gas pressure suddenly generated. Four circumferentially evenly distributed limiting blocks 132 protrude from the inner wall of the frustum section 13. The limiting blocks 132 can limit the upper outer circumference of the heated tank body 7, avoiding horizontal displacement of the heated tank body 7. At the same time, for the heated tank body 7 with a conical surface structure at the upper part, the inner wall of the frustum section 13 can be in blocking cooperation with the conical surface structure of the heated tank body 7, thereby preventing upward and horizontal displacement of the heated tank body 7. Thus, the limiting blocks 132 on the upper cup body 1 and the inner wall of the frustum section 13 constitute an upper limiting structure for limiting the upper part of the heated tank body 7, and the supporting and limiting ribs 25 on the lower cup body 2 constitute a lower limiting structure for limiting the lower part of the heated tank body 7.

[0054] On the outer wall of the first cylindrical section 11, a second external thread 111 is provided, and on the inner wall of the cover body 4, a second internal thread is provided. The second internal thread is adapted to the second external thread 111, which facilitates the connection between the cover body 4 and the upper cup body 1. In addition, at the upper port of the first cylindrical section 11, an inward flanging 112 is provided. The flanging 112 can be stuck to the inner side of the top port edge of the to-be-heated tank body 7. On the one hand, when people drink hot drinks, their lips will contact the flanging 112, which can prevent scalding the mouth; on the other hand, it can form a downward limit for the to-be-heated tank body 7. For the to-be-heated tank body 7, an overall "lower support and upper pressure" installation method is formed to prevent the to-be-heated tank body 7 from moving up and down.

[0055] As Figure 2 shown, the puncturing assembly 3 includes an installation cylinder 31, a puncturing body 32 slidably assembled in the installation cylinder 31 in a guiding manner, and a spring 33 provided between the puncturing body 32 and the installation cylinder 31. Specifically, in combination with Figure 9 , Figure 10 shown, the installation cylinder 31 includes a cylinder body 311. At the position of the cylinder opening at one end of the cylinder body 311, a cylinder opening inner flange 313 extending inward and a cylinder opening outer flange 315 extending outward are provided. The cylinder opening inner flange 313 is in a blocking fit with the puncturing body 32 to prevent the puncturing body 32 from slipping out of the cylinder body 311 outward; the cylinder opening outer flange 315 is in a blocking fit with the outer wall surface of the lower cup body 2. An annular protrusion 316 for blocking fit with the inner wall surface of the lower cup body 2 is provided on the outer peripheral surface of the cylinder body 311. An annular groove is formed between the annular protrusion 316 and the cylinder opening outer flange 315. The size and shape of the annular groove are adapted to the size and shape of the installation opening 26 on the lower cup body 2. When assembling the installation cylinder 31 on the lower cup body 2, the cylinder body 311 is passed through the installation opening 26 until the annular protrusion 316 abuts against the outer wall surface of the lower cup body 2. The lower cup body 2 and the installation cylinder 31 are preferably injection-molded. The height of the annular protrusion 316 protruding from the outer peripheral surface of the cylinder body 311 is not very large. At the same time, a conical guiding surface is provided on the side of the annular protrusion 316 facing away from the cylinder opening outer flange 315. Therefore, by pressing the installation cylinder 31 inward forcefully, the annular protrusion 316 can cross the installation opening 26 and then cooperate with the cylinder opening outer flange 315 to be clamped and fixed on the lower cup body 2 together.

[0056] A cylinder cover 312 is also connected to the cylinder opening outer flange 315, which can be opened and closed. When closed, it can seal the cylinder opening at one end of the cylinder body 311 to prevent people from accidentally touching the puncturing body 32 inside and causing the water bag 5 to be punctured accidentally. Clamping protrusions are respectively provided on the cylinder cover 312 and the cylinder opening outer flange 315. When the cylinder cover 312 is closed, the two clamping protrusions are blocked to prevent the cylinder cover 312 from disengaging freely.

[0057] In addition, a baffle 314 is provided at the position of the barrel opening at the other end of the barrel body 311, and a through port 318 is provided on the baffle 314. At the same time, this end of the barrel body 311 is located inside the lower cup body 2, and a pressing leg 317 for pressing against the sealing film of the water bag 5 is also provided at this end. There are two pressing legs 317, which are horizontally spaced apart during use. By contacting the end face of the pressing leg 317 with the sealing film of the water bag 5, when the liquid in the water bag 5 flows continuously during transportation and drives the sealing film to bulge, the end face of the pressing leg 317 can limit the sealing film, preventing the sealing film from bulging excessively and accidentally contacting the puncturing body 32 and being punctured.

[0058] One end of the puncturing body 32 is a pressing end for manual pressing, and the other end is a cylindrical puncturing end. Specifically, as Figure 7 and Figure 8 shown, the puncturing body 32 includes a puncturing cylinder 321 with a cylinder cover 322 at one end and an opening at the other end. That is, the main body of the puncturing body 32 is a cylindrical structure, and the puncturing cylinder 321 is a cylindrical cylinder. The entire cylinder cover 322 constitutes the pressing end, and the size of the cylinder cover 322 is larger than that of the puncturing cylinder 321. It not only seals one end of the puncturing cylinder 321 but also has an extra edge part. The overall shape of the cylinder cover 322 is oval, which is adapted to the shape of a human finger, not only beautiful but also can increase the force-bearing area.

[0059] The open end of the puncturing cylinder 321 constitutes the cylindrical puncturing end. The cylindrical puncturing end is provided with a plurality of puncturing teeth 325 that extend away from the pressing end and are used to puncture the sealing film of the water bag 5. Each puncturing tooth 325 is continuously arranged along the cylindrical puncturing end. Each puncturing tooth 325 has a tooth tip and a tooth root, and the tooth width of each puncturing tooth 325 gradually increases from the tooth tip to the tooth root. The puncturing tooth 325 is triangular in shape as a whole. For the convenience of puncturing the sealing film, there are thin blades on both sides from the tooth tip to the tooth root.

[0060] The roots of any two adjacent piercing teeth 325 are connected. In this way, when a force is applied to the pressing end of the piercing body 32, the entire piercing body 32 moves in the direction of the water bag 5. The tips of the piercing teeth 325 first come into contact with and pierce through the sealing film of the water bag 5. Since there is a spacing between the tips of the piercing teeth 325, the sealing film is pierced at multiple points at this time. As the piercing body 32 continues to move, the roots of the piercing teeth 325 gradually come into contact with the sealing film. During this process, the holes pierced in the sealing film gradually become larger. Finally, the local material of the sealing film will be completely cut off, forming an opening with the same size as the cylindrical piercing end. And the local material of the cut-off sealing film can enter the inner cavity of the cylindrical piercing end. When the piercing body 32 retracts, the liquid in the water bag 5 can flow out smoothly through the opening without blocking the opening. Moreover, the two abutting legs 317 on the mounting cylinder 31 are arranged horizontally at intervals, and the space between them is vertically through. Therefore, the liquid in the water bag 5 can flow downward smoothly and flow onto the self-heating pack 6 to fully undergo an exothermic reaction, ensuring the exothermic reaction effect of the self-heating pack 6.

[0061] Further, at least two continuously arranged piercing teeth 325 form a tooth group. All the piercing teeth 325 are divided into at least two tooth groups. The lengths of the piercing teeth 325 in each tooth group are different. During the process of piercing the water bag 5, the tip of the piercing tooth with the longest length will first come into contact with the sealing film. Compared with all the piercing teeth having the same length, the contact points are fewer at this time, and it is easier to pierce the sealing film under the same acting force. As the piercing body 32 moves, the short piercing teeth come into contact with the sealing film in turn, and similarly, it is also easy to pierce the sealing film.

[0062] A retaining edge 323 is provided at the edge of the cylinder cover 322 for engaging in a retaining fit with the inner flange 313 at the mouth of the mounting cylinder 31. When installing the piercing body 32, first, the spring 33 is sleeved outside the piercing cylinder 321, and then the cylindrical piercing end of the piercing body 32 is inserted into the cylinder body 311 of the mounting cylinder 31 with the opening facing inward until the retaining edge 323 abuts against the inner flange 313 at the mouth of the cylinder. Press the piercing body 32 forcefully to deform the retaining edge 323 and make it cross over the inner flange 313 at the mouth of the cylinder. Since one end of the spring 33 abuts against the cylinder cover 322 and the other end abuts against the baffle 314 of the mounting cylinder 31, under the reaction force of the spring 33, the retaining edge 323 engages in a retaining fit with the inner flange 313 at the mouth of the cylinder, preventing the piercing body 32 from coming out of the mounting cylinder 31. For the convenience of the deformation of the retaining edge 323 during installation, a plurality of deformation grooves 324 are evenly arranged on the retaining edge 323 to facilitate its elastic deformation to cross over the inner flange 313 at the mouth of the cylinder.

[0063] During the process of inserting the puncturing body 32, each puncturing tooth 325 passes through the through hole 318 on the baffle 314. After being inserted into place, when the puncturing body 32 is not pressed, each puncturing tooth 325 does not protrude from the end surface of the two abutting legs 317, ensuring that the water bag 5 can be pierced only by pressing the puncturing body 32. Among them, the through hole 318 is a round hole, the size of which is adapted to the outer diameter of the puncturing cylinder 321, and the puncturing body 32 can be guided during the movement of the puncturing body 32. At the same time, the inner cavity of the cylinder 311 is an elliptical cavity, the size of which is adapted to the outer contour size of the baffle 323, and the puncturing body 32 can also be guided during the movement of the puncturing body 32.

[0064] In addition, in order to prevent the self-heating bag 6 from causing harm to personnel by preventing the hot gas flow from flowing into the mounting tube 31 through the gap between the puncture tube 321 and the through port 318 during an exothermic reaction, and then flowing outward through the gap between the retaining edge 323 and the inner flange 313 of the tube mouth, or directly flowing outward through the gap between the mounting tube 31 and the mounting port 26 of the lower cup body 2, a sealing ring can be installed on the inner wall of the through port 318 to seal with the outer peripheral surface of the puncture tube 321. At the same time, a sealing ring can be provided between the outer flange 315 of the tube mouth and the outer wall surface of the lower cup body 2, or between the annular protrusion 316 and the inner wall surface of the lower cup body 2, so as to ensure the sealing between the mounting tube 31 and the mounting port 26 and prevent hot gas from leaking out.

[0065] In other embodiments of the self-heating device: a lower limit structure for horizontally limiting the tank body to be heated may be provided only on the lower cup body, and a horizontal limit structure may no longer be provided on the upper cup body. However, after the upper cup body is connected to the lower cup body, it may generate downward pressure on the tank body to be heated to prevent it from moving upward.

[0066] In other embodiments of the self-heating device: the upper end of the supporting limiting rib can extend to the upper part of the lower cup body, or even to the upper cup mouth, and at this time there is more contact area between the limiting part and the tank body to be heated.

[0067] In other embodiments of the self-heating device: the lower end of the support and limit rib may not extend to the bottom wall of the lower cup body, but may be at a certain distance. At this time, the support and limit rib only relies on the connection strength between the side wall of the lower cup body to ensure the overall use effect.

[0068] In other embodiments of the self-heating device: the angle between the angled surface and the vertical surface can be exactly 90 degrees. In this case, the support portion is arranged horizontally, and the support portion can support the bottom plane of the tank body to be heated.

[0069] In other embodiments of the self-heating device: when the limiting structures are arranged one-to-one above the supporting structure, the supporting structure and the limiting structure may not be an integrated supporting limiting rib, and the two may be independently and spaced apart from each other. For example, the supporting structure is a supporting rib, and the limiting structure is a limiting rib spaced apart above the supporting rib. At this time, the upper end surface of the supporting rib may be used as a supporting portion. Of course, in order to ensure that the supporting rib can support the tank body to be heated, it is required that the height of the supporting rib protruding from the inner wall of the lower cup body is greater than the height of the limiting rib protruding from the inner wall of the lower cup body.

[0070] In other embodiments of the self-heating device: when the supporting structure and the limiting structure are independently provided, the two may not be arranged one-to-one up and down, for example, they may be staggered in the up and down directions. Of course, the number of the two may also be different, but since both are arranged at intervals along the inner wall of the lower cup body, the number is preferably more than three.

[0071] In other embodiments of the self-heating device: when the supporting structure and the limiting structure are independently provided, the limiting structure can also be provided on the upper part of the lower cup body, so as to limit the middle part of the tank body to be heated.

[0072] In other embodiments of the self-heating device: the supporting structure and the limiting structure may not be multiple and spaced apart, but both may be ring-shaped. In this case, the supporting structure is a supporting ring, and the limiting structure is a limiting ring. Of course, the inner diameter of the supporting ring is smaller than the inner diameter of the limiting ring to ensure that the supporting ring can support the tank body to be heated.

[0073] In other embodiments of the self-heating device: a plurality of support structures are arranged at intervals along the inner wall of the lower cup body, and a flow space for the hot air flow to flow from bottom to top is formed between two adjacent support structures, but the limiting structure is a limiting ring. At this time, in order to allow the hot air flow to flow upward more and achieve a better heating effect on the outer peripheral surface of the heated tank body, the limiting ring can be arranged upward as long as it can prevent the heated tank body from moving horizontally.

[0074] In other embodiments of the self-heating device: when the supporting portion contacts the bottom conical surface of the tank body to be heated, the supporting portion can also be set to a curved surface to achieve surface-to-surface contact with the bottom conical surface of the tank body to be heated, thereby having a larger contact area; similarly, the limiting portion can also be set to a curved surface to achieve surface-to-surface contact with the side wall of the tank body to be heated, thereby having a larger contact area.

[0075] In other embodiments of the self-heating device: The support structure can also be arranged at the top of the inner wall of the cup body, for example, as an annular support platform. At this time, the top end of the can to be heated is provided with an outward-turning edge, and the annular support platform supports the outward-turning edge of the can to be heated. And at this time, the limiting structure is located below the annular support platform and can be in contact with and limit the side wall in the middle of the can to be heated, or can be in contact with and limit the side wall at the bottom of the can to be heated. The specific form of the limiting structure can be a limiting ring or a plurality of spaced-apart limiting protrusions.

[0076] In the embodiment of the cup body of the self-heating device in the present utility model: The specific structure of the cup body of the self-heating device is the same as the structure of the lower cup body in any of the above embodiments of the self-heating device, and will not be repeated here.

Claims

1. A cup body of a self-heating device, wherein a support structure for supporting a can to be heated is provided on the inner wall of the cup body, and the support structure includes a support portion for contacting the can to be heated and playing a supporting role, and is characterized in that, A limiting structure for limiting the horizontal movement of the tank body to be heated is also provided on the inner wall of the cup body. The limiting structure includes a limiting portion for contacting the side of the tank body to be heated and playing a limiting role.

2. The cup body of the self-heating device according to claim 1, wherein, The supporting part is used to contact the bottom of the tank to be heated, and the limiting part is located above the supporting part. There are multiple supporting structures and limiting structures arranged at intervals along the inner wall of the cup body, and a flow space for the heating airflow to flow from bottom to top is formed between two adjacent supporting structures and between two adjacent limiting structures.

3. The cup body of the self-heating device according to claim 2, characterized in that, The number of the supporting structures is equal to that of the limiting structures, and the limiting structures are arranged above the supporting structures in a one-to-one correspondence.

4. The cup body of the self-heating device according to claim 3, characterized in that, The support structure and the limiting structure are integrated into a supporting limiting convex rib, and a step structure is arranged at the upper end of the supporting limiting convex rib. The vertical surface in the step structure constitutes the limiting portion, and the angle surface in the step structure arranged at an angle with the vertical surface constitutes the supporting portion.

5. The cup body of the self-heating device according to claim 4, characterized in that, The angled surface is an inclined surface whose angle with the vertical surface is greater than 90 degrees, and the inclination degree of the angled surface meets the taper adaptation of the bottom conical surface of the tank body to be heated.

6. The cup body of the self-heating device according to claim 4 or 5, characterized in that, The lower end of the supporting and limiting convex rib extends to the bottom wall of the cup body.

7. The cup body of the self-heating device according to claim 4 or 5, characterized in that The upper end of the supporting and limiting convex rib is located in the middle of the cup body in the height direction.

8. The cup body of the self-heating device according to claim 2, characterized in that, The supporting structure is a supporting convex rib extending up and down, and a supporting inclined surface is arranged at the upper end of the supporting convex rib, and the supporting inclined surface constitutes the supporting part.

9. A self-heating device, comprising a lower cup body and an upper cup body connected to the lower cup body, characterized in that, The lower cup body is the cup body of the self-heating device according to any one of claims 1 to 8.

10. The self-heating device according to claim 9, characterized in that, The limiting structure in the lower cup body is used to limit the lower part of the tank body to be heated, and the upper cup body is provided with an upper limiting structure used to limit the upper part of the tank body to be heated.

Images