Portable heat preservation box

Abstract

The utility model relates to a portable heat preservation box, which is provided with a detachable connecting device, so that a lifting device can be conveniently mounted and dismounted, a user can quickly dismount and mount a lifting piece according to actual requirements, and the use convenience is greatly improved. The movable seat in the lifting device can rotate around the mounting column, so that a user can freely adjust the direction of the lifting handle according to carrying habits and personal preferences, and more flexible and comfortable carrying experience is provided. Moreover, through a detachable locking structure between the limiting cover and the mounting column, it is ensured that the lifting device is firmly fixed to the outer side wall of the box body, the shaking or falling-off phenomenon possibly occurring in the carrying process is avoided, and the overall stability and durability of the heat preservation box are ensured. In addition, due to the fact that the lifting device is easy to detach, a user can clean or replace the lifting device easily, the good state of the heat preservation box is kept, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of heat preservation box especially portable heat preservation box. BACKGROUND

[0002] The portable heat preservation box on the market is widely used in outdoor activities, travel and daily life to keep the temperature of food and beverage. However, the existing portable heat preservation box still has some deficiencies in actual use. Specifically, the end of the handle or the pull rope of many portable heat preservation boxes is inconvenient to disassemble, which means that the user will have some deficiencies when moving the heat preservation box from one location to another or when disassembling the handle or the pull rope for use.

[0003] In addition, the end of the handle or the pull rope cannot move freely, which causes the orientation of the handle or the pull rope to be unable to adjust. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a portable heat preservation box that can solve the problems of poor convenience and inability to adjust the lifting direction.

[0005] The utility model provides a portable heat preservation box, which comprises:

[0006] A box body is provided with a mounting hole on the outer side wall;

[0007] A lifting device is provided, which comprises a movable seat and a lifting piece, the lifting piece is arranged on the movable seat, and a through hole is formed in the movable seat; and

[0008] A connecting device is provided, which comprises a mounting column, a mounting bolt and a limiting cover, a first connecting part is arranged on the mounting column, a second connecting part is arranged on the limiting cover, the mounting column passes through the through hole and can be detachably inserted into the mounting hole, the mounting bolt is inserted through the mounting column and screwed into the mounting hole, and the limiting cover is arranged on the mounting column, so that the second connecting part and the first connecting part can be detachably locked, and the mounting column and the limiting cover jointly limit the movable seat on the outer side wall of the box body, and then the movable seat can rotate around the mounting column.

[0009] Preferably, the first connecting part comprises a buckle hole, the second connecting part comprises a buckle protrusion, and each buckle protrusion is detachably clamped in the buckle hole one by one; or

[0010] The first connecting part comprises at least one buckle protrusion, the second connecting part comprises at least one buckle hole, and each buckle protrusion is detachably clamped in the buckle hole one by one.

[0011] Preferably, at least one connecting protrusion is arranged on the limiting cover, and at least one second connecting part is arranged on each connecting protrusion.

[0012] At least one avoiding hole is arranged on the mounting column, and at least one first connecting part is arranged in each avoiding hole. Each connecting protrusion corresponds to each avoiding hole, so that each first connecting part corresponds to each second connecting part.

[0013] Preferably, the first connecting part comprises a first thread, the second connecting part comprises a second thread, and the first thread is screwed with the second thread; or

[0014] The first connecting part comprises a protruding column, and the second connecting part comprises a sliding installation groove. When the protruding column is inserted and slides along the sliding installation groove under the driving of the mounting column, the protruding column and the sliding installation groove are detachably clamped, so as to limit the relative position of the limiting cover and the mounting column.

[0015] Preferably, an edge of the limiting cover is provided with a connecting groove, and the edge of the mounting column is correspondingly inserted into the connecting groove, so that the edge of the limiting cover protrudes outside the circumferential edge of the mounting column.

[0016] Preferably, the connecting device further comprises a support frame, the support frame is provided with a support column, the support frame is arranged on the inner side wall of the box body, the support column is exposed on the outer side wall of the box body, and the mounting hole is located outside the circumferential edge of the support column.

[0017] Preferably, the connecting device further comprises an internally threaded column, the internally threaded column is arranged on the support column, and the internally threaded column is screwed with the mounting bolt.

[0018] Preferably, a plurality of limiting protrusions are arranged on the support frame, a plurality of insertion grooves are arranged on the inner side wall of the box body, and each limiting protrusion is correspondingly clamped in each insertion groove.

[0019] Preferably, a fixed carabiner is arranged on the movable seat, the lifting device further comprises a movable carabiner, and the lifting piece is wound around the movable carabiner and the fixed carabiner; or

[0020] The lifting piece comprises a pull rope or a handle.

[0021] Preferably, the portable heat preservation box comprises two connecting devices, the lifting device comprises the lifting piece and two movable seats, and the box body is provided with two mounting holes.

[0022] Two of the connecting devices are arranged in the two mounting holes in one-to-one correspondence, two driving movable seats are arranged on the two connecting devices in one-to-one correspondence, and the lifting pieces are arranged on the two movable seats respectively.

[0023] The utility model discloses the following beneficial effects are realized:

[0024] The utility model relates to a portable heat preservation box, through setting up detachable connecting device, make lifting device can conveniently install and detach, and user can according to actual need quick detach lifting piece, has improved use convenience greatly.

[0025] Furthermore, through the detachable locking structure between the limiting cover and the mounting column, the lifting device is firmly fixed on the outer side wall of the box body, avoiding the shaking or falling phenomenon that may occur during the carrying process, ensuring the overall stability and durability of the heat preservation box. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above and other objects, features and advantages of the present utility model will become more apparent from the following detailed description of exemplary embodiments of the present utility model, taken in conjunction with the accompanying drawings, in which like reference numerals refer to like elements throughout. In the exemplary embodiments of the present utility model, like reference numerals are generally used to refer to like elements throughout.

[0027] Figure 1 is a structural schematic view of the portable heat preservation box in some embodiments of the utility model;

[0028] Figure 2 is a structural schematic view of the portable heat preservation box from a second angle; Figure 1

[0029] Figure 3 is a structural schematic view of the portable heat preservation box from a third angle; Figure 1

[0030] Figure 4 is Figure 3 an enlarged view at A;

[0031] Figure 5 is an exploded view of the portable heat preservation box in some embodiments of the utility model;

[0032] Figure 6 is another exploded view of the portable heat preservation box in some embodiments of the utility model;

[0033] Figure 7 ​​is the internal structure schematic view of the portable heat preservation box in some embodiments of the utility model;

[0034] Figure 8 is Figure 7 The enlarged view at B. DETAILED DESCRIPTION

[0035] Embodiments of the present application will be described in more detail with reference to the drawings. Although embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to convey the scope of the present application to those skilled in the art.

[0036] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present application, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present application. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0037] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0038] Unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected or integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] Figure 1 and Figure 2The portable heat preservation box 10 is used for containing the article which needs to be preserved.

[0040] The portable heat preservation box 10 comprises a box body 1, a pulling device 2 and a connecting device 3, wherein the pulling device 2 and the connecting device 3 are arranged on the box body 1.

[0041] As shown in the figure, Figures 1 to 8 The box body 1 is provided with a mounting hole 11 on the outer wall.

[0042] The pulling device 2 comprises a movable seat 21 and a pulling piece 22, wherein the pulling piece 22 is arranged on the movable seat 21, and the movable seat 21 is provided with a through hole 211; the connecting device 3 comprises a mounting column 31, a mounting bolt 32 and a limiting cover 33, wherein the mounting column 31 is provided with a first connecting part 311, the limiting cover 33 is provided with a second connecting part 331, the mounting column 31 is arranged through the through hole 211 and can be detachably inserted into the mounting hole 11, the mounting bolt 32 is inserted through the mounting column 31 and is screwed into the mounting hole 11, and the limiting cover 33 is arranged on the mounting column 31, so that the second connecting part 331 and the first connecting part 311 are detachably locked, and the mounting column 31 and the limiting cover 33 jointly limit the movable seat 21 on the outer wall of the box body 1, and the movable seat 21 can rotate around the mounting column 31.

[0043] It can be understood that the through hole 211 on the movable seat 21 is used for mounting the connecting device 3. The mounting column 31 passes through the through hole 211 on the movable seat 21 and is detachably inserted into the mounting hole 11 of the box body 1, thereby fixing the pulling device 2. The mounting bolt 32 can ensure that the pulling device 2 will not loosen during use. The limiting cover 33 is arranged on the mounting column 31, and the second connecting part 331 and the first connecting part 311 are detachably locked, so that the mounting column 31 and the limiting cover 33 jointly limit the movable seat 21 on the outer wall of the box body 1. The limiting cover 33 not only increases the stability of the pulling device 2, but also prevents the movable seat 21 from falling off the box body 1.

[0044] It should be noted that the user can conveniently lift or pull the portable heat preservation box 10 through the pulling piece 22. According to the use requirement, the user can easily rotate the pulling device 2 to adjust the pulling direction, so as to adapt to different carrying modes. When the pulling device 2 needs to be disassembled or cleaned, the user can operate in the reverse order, that is, first unlock the second connecting part 331 and the first connecting part 311, then take off the limiting cover 33, and finally take out the mounting column 31. Thus, not only the problems of poor use convenience and unadjustable pulling direction in the prior art are solved, but also the portable heat preservation box 10 has the advantages of simple structure, convenient use and the like, and is suitable for large-scale popularization and use.

[0045] As shown in Figure 3 and Figure 5 In some embodiments of the portable heat preservation box 10, the first connecting part 311 comprises a buckle hole, and the second connecting part 331 comprises a buckle protrusion, each of which is detachably buckled to the other.

[0046] It can be understood that the buckle hole is used to receive the buckle protrusion from the limiting cover 33, so as to realize the quick connection of the two. The buckle protrusion is arranged on the limiting cover 33, and the number and position thereof are matched with the buckle hole on the mounting column 31. The buckle protrusion is used to cooperate with the buckle hole on the mounting column 31 to form a detachable buckling structure, so as to firmly fix the limiting cover 33 on the mounting column 31. In this way, the mounting and dismounting of the limiting cover 33 becomes more simple and fast.

[0047] In other embodiments of the portable heat preservation box 10, the first connecting part 311 comprises at least one buckle protrusion, and the second connecting part 331 comprises at least one buckle hole, each of which is detachably buckled to the other.

[0048] It can be understood that the difference between the embodiments and the foregoing embodiments is that the arrangement positions of the buckle protrusion and the buckle hole are adjusted, but they are also used to realize the reliable connection of the limiting cover 33 and the mounting column 31.

[0049] As shown in Figure 3 , Figure 5 and Figure 8 In some embodiments of the portable heat preservation box 10, at least one connecting protrusion wall 332 is arranged on the limiting cover 33, and at least one second connecting part 331 is arranged on each connecting protrusion wall 332; at least one avoiding hole 312 is arranged on the mounting column 31, and at least one first connecting part 311 is arranged in each avoiding hole 312, each connecting protrusion wall 332 corresponds to each avoiding hole 312, so that each first connecting part 311 corresponds to each second connecting part 331.

[0050] It can be understood that the number and position of the connecting protrusion wall 332 are matched with the avoiding hole 312 on the mounting column 31. The connecting protrusion wall 332 is used to cooperate with the avoiding hole 312 on the mounting column 31, and one or more second connecting parts 331 are arranged on each connecting protrusion wall 332. The number and position of the second connecting part 331 are matched with the first connecting part 311 on the mounting column 31. The second connecting part 331 is used to cooperate with the first connecting part 311 on the mounting column 31 to form a detachable buckling structure.

[0051] The number and position of the avoiding holes 312 are matched with the connecting convex walls 332 on the limiting cover 33. The avoiding holes 312 are used to receive the connecting convex walls 332 from the limiting cover 33, and one or more first connecting parts 311 are arranged in each avoiding hole 312. The first connecting parts 311 are arranged in the avoiding holes 312, and the number and position of the first connecting parts 311 are matched with the second connecting parts 331 on the limiting cover 33.

[0052] It should be noted that when the limiting cover 33 is arranged on the mounting column 31, the connecting convex walls 332 are aligned with the avoiding holes 312, and the second connecting parts 331 are one-to-one corresponding to the first connecting parts 311. By pressing or inserting in a rotating manner, the second connecting parts 331 enter the first connecting parts 311 to form a stable clamping structure, thereby fixing the limiting cover 33 on the mounting column 31.

[0053] In some embodiments of the portable heat preservation box 10, the first connecting parts 311 include first threads, and the second connecting parts 331 include second threads, and the first threads are screwed with the second threads.

[0054] It can be understood that when the limiting cover 33 is arranged on the mounting column 31, the second threads are aligned with the first threads, and by rotating, the second threads are screwed into the first threads to form a stable threaded connection structure, thereby fixing the limiting cover 33 on the mounting column 31. When it is necessary to disassemble the limiting cover 33, the limiting cover 33 is only needed to be rotated in the opposite direction, so that the second threads are separated from the first threads, and the limiting cover 33 can be quickly and conveniently removed.

[0055] The first connecting parts 311 include convex columns, and the second connecting parts 331 include sliding installation grooves. When the convex columns are inserted into and slide along the sliding installation grooves under the driving of the mounting column 31, the convex columns and the sliding installation grooves are detachably clamped, thereby limiting the relative position of the limiting cover 33 and the mounting column 31.

[0056] It can be understood that when the limiting cover 33 is arranged on the mounting column 31, the convex columns are aligned with the sliding installation grooves. By gently pressing or rotating, the convex columns enter the sliding installation grooves and slide along the sliding installation grooves until the convex columns and the sliding installation grooves form a stable clamping structure, thereby fixing the limiting cover 33 on the mounting column 31. When it is necessary to disassemble the limiting cover 33, the limiting cover 33 is only needed to be moved in the opposite direction, so that the convex columns are separated from the sliding installation grooves, and the limiting cover 33 can be easily removed.

[0057] It should be noted that the arrangement of the sliding installation grooves and the convex columns makes the installation and disassembly of the limiting cover 33 more simple and convenient, and also enables the limiting cover 33 and the mounting column 31 to form a stable connection, thereby ensuring that the lifting device 2 will not be loose or fall off during use.

[0058] As Figure 3 and Figure 8As shown, in some embodiments of the portable insulated box 10, the edge of the limiting cover 33 is provided with a connecting groove 333, which is used for the edge of the mounting post 31 to be inserted into, so that the edge of the limiting cover 33 protrudes from the outer periphery of the mounting post 31.

[0059] Understandably, the connecting groove 333 is used to accommodate the edge of the mounting post 31, so that a stable connection structure is formed between the mounting post 31 and the limiting cover 33.

[0060] When the limiting cover 33 is placed on the mounting post 31, the connecting groove 333 aligns with the edge of the mounting post 31. By gently pressing, the edge of the mounting post 31 enters the connecting groove 333, thus fixing the limiting cover 33 to the mounting post 31. The edge of the limiting cover 33 protrudes beyond the outer periphery of the mounting post 31, increasing the stability of the entire connection structure. When it is necessary to remove the limiting cover 33, simply apply gentle force in the opposite direction to disengage the edge of the mounting post 31 from the connecting groove 333, and the limiting cover 33 can be easily removed.

[0061] like Figures 6 to 8 As shown, in some embodiments of the portable insulated box 10, the connecting device 3 further includes a support frame 34, on which a support column 341 is provided. The support frame 34 is located on the inner side wall of the box body 1, and the support column 341 is exposed on the outer side wall of the box body 1. The mounting hole 11 is located on the outer periphery of the support column 341.

[0062] Understandably, the support frame 34 is used to fix the support column 341 and ensure its stable connection to the housing 1. The support column 341 serves as a support point for the mounting column 31, ensuring that the mounting column 31 can be stably inserted into the mounting hole 11 and providing sufficient support force to support the lifting device 2.

[0063] When the mounting post 31 passes through the through hole 211 of the movable seat 21 and is inserted into the mounting hole 11 on the housing 1, the support post 341 provides support for the mounting post 31, ensuring that the mounting post 31 can be stably inserted into the mounting hole 11. The mounting hole 11 is located on the outer periphery of the support post 341, so that the mounting post 31 can be firmly fixed to the housing 1, while ensuring the stability and mobility of the lifting device 2. When it is necessary to disassemble the lifting device 2, the mounting post 31 can be removed by removing the mounting bolt 32, and then the lifting device 2 can be disassembled.

[0064] like Figure 5 and Figure 8 As shown, in some embodiments of the portable insulated box 10, the connecting device 3 further includes an internally threaded post 35, which is disposed on the support post 341 and is screwed to the mounting bolt 32.

[0065] Understandably, the internally threaded post 35 is used to mate with the mounting bolt 32 to form a detachable threaded connection structure. When the mounting post 31 passes through the through hole 211 of the movable seat 21 and is inserted into the mounting hole 11 on the housing 1, the mounting bolt 32 passes through the mounting post 31 and is screwed into the internally threaded post 35. By rotating, the mounting bolt 32 is screwed into the internally threaded post 35, thereby fixing the mounting post 31 to the housing 1 and ensuring the stability and mobility of the lifting device 2.

[0066] Furthermore, the internally threaded column 35 can be fixed to the support column 341 by interference fit or limit clamping.

[0067] like Figure 6 As shown, in some embodiments of the portable insulated box 10, the support frame 34 is provided with a number of limiting protrusions 342, and the inner side wall of the box body 1 is provided with a number of slots 12, with each limiting protrusion 342 correspondingly locked in each slot 12.

[0068] Understandably, the number and position of the limiting protrusions 342 match the slots 12 on the housing 1. The limiting protrusions 342 are used to engage with the slots 12 on the housing 1 to form a detachable locking structure, ensuring that the support frame 34 can be securely fixed to the housing 1. The slots 12 are used to receive the limiting protrusions 342 from the support frame 34, fixing the support frame 34 to the housing 1 by locking.

[0069] It should be noted that when the support frame 34 is installed on the housing 1, the limiting protrusion 342 is aligned with the slot 12. By inserting the support frame 342 into the slot 12, a stable locking structure is formed, fixing the support frame 34 to the housing 1. When it is necessary to remove the support frame 34, simply apply a little force in the opposite direction to dislodge the limiting protrusion 342 from the slot 12, and the support frame 34 can be easily removed.

[0070] like Figures 4 to 8 As shown, in some embodiments of the portable insulated case 10, a fixed swivel buckle 212 is provided on the movable base 21, and the lifting device 2 also includes a movable swivel buckle 23, with the lifting member 22 wrapped around the movable swivel buckle 23 and the fixed swivel buckle 212.

[0071] Understandably, the fixed clasp 212 is mounted on the movable base 21, typically located on one side of the movable base 21. The fixed clasp 212 is used to connect to one end of the lifting member 22, providing a fixed connection point for the lifting member 22. The movable clasp 23 is used to cooperate with the fixed clasp 212, connecting the lifting member 22 by wrapping around it, thereby enabling the installation and removal of the lifting member 22. Specifically, the lifting member 22 includes a pull rope or a handle.

[0072] It can be understood that the lifting piece 22 can be configured as a pull rope or a handle according to different actual use requirements.

[0073] As shown in the drawings, Figures 3 to 6 In some embodiments of the portable heat preservation box 10, the portable heat preservation box 10 comprises two connecting devices 3, the lifting device 2 comprises a lifting piece 22 and two movable seats 21, and the box body 1 is provided with two mounting holes 11; the two connecting devices 3 are arranged in the two mounting holes 11 one by one, and the two driving movable seats 21 are arranged on the two connecting devices 3 one by one, and the lifting piece 22 is arranged on the two movable seats 21 respectively.

[0074] It can be understood that the two connecting devices 3 are arranged on the two sides of the box body 1 respectively, and each connecting device 3 corresponds to one mounting hole 11. The connecting device 3 is used for fixing the lifting device 2 on the box body 1, and ensures that the lifting device 2 can rotate around the mounting column 31.

[0075] The implementation of the present application has the following beneficial effects:

[0076] The portable heat preservation box is characterized in that the detachable connecting device is arranged, so that the lifting device can be conveniently installed and detached, and the user can quickly disassemble and assemble the lifting piece according to actual needs, thereby greatly improving the convenience of use. Since the movable seat in the lifting device can rotate around the mounting column, the user can freely adjust the direction of the handle according to the carrying habit and personal preference, thereby providing a more flexible and comfortable carrying experience.

[0077] Furthermore, the detachable locking structure between the limiting cover and the mounting column ensures that the lifting device is firmly fixed on the outer side wall of the box body, avoids the shaking or falling phenomenon that may occur during the carrying process, and guarantees the overall stability and durability of the heat preservation box. In addition, since the lifting device is easy to disassemble, the user can easily clean or replace it, thereby maintaining the good state of the heat preservation box and prolonging the service life.

[0078] The scheme of the present application has been described in detail above with reference to the drawings. In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments. Those skilled in the art should know that the actions and modules involved in the specification are not necessarily required by the present application. In addition, it can be understood that the steps in the method of the embodiments of the present application can be adjusted, combined and reduced in sequence according to actual needs, and the modules in the device of the embodiments of the present application can be combined, divided and reduced according to actual needs.

[0079] The above has described various embodiments of the present application, the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical application, or improvement to the technology in the market, or to enable other ordinary skilled in the art to understand the embodiments disclosed herein.

Claims

1. A portable cooler, characterized by, The utility model relates to a portable heat preservation box, including: a box, which is provided with a mounting hole on the outer wall; a lifting device, which comprises a movable seat and a lifting piece, the lifting piece is arranged on the movable seat, and a through hole is formed in the movable seat; and a connecting device, which comprises a mounting column, a mounting bolt and a limiting cover, a first connecting part is arranged on the mounting column, a second connecting part is arranged on the limiting cover, the mounting column passes through the through hole and is detachably inserted into the mounting hole, the mounting bolt is inserted into the mounting column and is screwed into the mounting hole, and the limiting cover covers the mounting column, so that the second connecting part and the first connecting part are detachably locked, so that the mounting column and the limiting cover jointly limit the movable seat on the outer wall of the box, and the movable seat can rotate around the mounting column.

2. The portable cooler of claim 1, wherein, The first connecting part comprises a buckle hole, the second connecting part comprises a buckle protrusion, and each buckle protrusion is detachably buckled in the buckle hole one by one; or The first connecting part comprises at least one buckle protrusion, the second connecting part comprises at least one buckle hole, and each buckle protrusion is detachably buckled in the buckle hole one by one.

3. The portable cooler of claim 1, wherein, At least one connecting convex wall is arranged on the limiting cover, and at least one second connecting part is arranged on each connecting convex wall; At least one avoiding hole is formed in the mounting column, at least one first connecting part is arranged in each avoiding hole, each connecting convex wall corresponds to each avoiding hole, and each first connecting part corresponds to each second connecting part.

4. The portable cooler of claim 1, wherein, The first connecting part comprises a first thread, the second connecting part comprises a second thread, and the first thread is screwed with the second thread; or The first connecting part comprises a convex column, the second connecting part comprises a sliding installation groove, when the convex column is inserted into and slides along the sliding installation groove under the driving of the mounting column, the convex column and the sliding installation groove are detachably buckled, so as to limit the relative position of the limiting cover and the mounting column.

5. The portable cooler of any one of claims 1 to 4, wherein, An edge of the limiting cover is provided with a connecting groove, the edge of the limiting cover is correspondingly inserted into the connecting groove, and the edge of the limiting cover protrudes outward from the circumferential edge of the mounting column.

6. The portable cooler of claim 1, wherein, The connecting device further comprises a support frame, the support frame is provided with a support column, the support frame is arranged on the inner wall of the box, the support column is exposed on the outer wall of the box, and the mounting hole is located on the outer side of the circumferential edge of the support column.

7. The portable cooler of claim 6, wherein, The connecting device further comprises an internal thread column, the internal thread column is arranged on the support column, and the internal thread column is screwed with the mounting bolt.

8. A portable cooler according to claim 6 or 7, characterized in that A plurality of limiting protrusions are arranged on the support frame, a plurality of insertion grooves are arranged on the inner wall of the box, and each limiting protrusion is correspondingly buckled in each insertion groove.

9. The portable cooler of claim 1, wherein, The movable seat is provided with a fixed buckle, the lifting device further comprises a movable buckle, and the lifting piece is connected to the movable buckle and the fixed buckle; or The lifting piece comprises a lifting rope or a lifting handle.

10. The portable cooler of claim 1 or 9, wherein, The portable heat preservation box comprises two connecting devices, the lifting device comprises the lifting piece and two movable seats, and the box is provided with two mounting holes; Two of the connecting devices are arranged in the two mounting holes in one-to-one correspondence, two driving movable seats are arranged on the two connecting devices in one-to-one correspondence, and the pulling members are arranged on the two movable seats, respectively.

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