Injection molding heat preservation box

Abstract

The utility model provides an injection molding heat preservation box, which comprises a box main body and a lifting component, the box main body comprises a shell component, a cover component and a storage cavity formed by connecting the shell component and the cover component, one side of the cover component is hinged with one side of the shell component through a pin shaft, and the lifting component is arranged in the storage cavity. The box main body comprises a lock catch assembly, and the shell assembly and the cover assembly are locked and fixed through the lock catch assembly; the lifting assembly comprises a lifting piece and connecting bases, inserting pieces are arranged at the two ends of the lifting piece respectively, and each connecting base comprises an inserting opening allowing the corresponding inserting piece to be inserted and a buckling opening used for buckling the corresponding inserting piece. And the plug connector is used for assembling the lifting piece on the shell assembly in a manner that the plug connector is partially inserted into the plug interface and is buckled with the buckle interface. According to the injection molding heat preservation box, the detachable plug connector and the detachable connecting base are arranged, the plug connector is inserted into the connecting base to achieve assembly of the lifting piece and the shell assembly, and the installation and disassembly efficiency of the injection molding heat preservation box is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of storage products, and in particular relates to an injection-molded heat preservation box. Background Art

[0002] With the improvement of living standards and the leap of the catering industry, take-out has become a new profit growth point for the catering industry. Enjoying all kinds of delicious food at home with family has also become a healthy and natural lifestyle. It is more common in developed countries abroad and is becoming increasingly popular in China. The insulated box has attracted the attention of the catering industry for its safety, environmental protection, heat preservation and cold preservation, and easy to carry.

[0003] However, the connection between the lifting piece and the box body of the existing injection molded thermal insulation box is mostly fixed connection or integrated connection, the selection of the lifting piece is relatively limited, and the connection between the lifting piece and the box body is relatively troublesome, and the efficiency of installation and disassembly is relatively low. Utility Model Content

[0004] The utility model aims to ensure that the stability of the injection molding heat preservation box is improved while improving the convenience of installation and disassembly of the injection molding heat preservation box, and provides an injection molding heat preservation box.

[0005] The utility model adopts the following technical solution to solve its technical problems: an injection molded thermal insulation box includes a box body and a lifting assembly, the box body includes a shell assembly, a cover assembly and a storage cavity formed by connecting the shell assembly and the cover assembly, one side of the cover assembly is hinged to one side of the shell assembly through a pin, the box body includes a locking assembly and the shell assembly and the cover assembly are locked and fixed through the locking assembly; the lifting assembly includes a lifting piece and a connecting seat for assembling the lifting piece to the two sides of the shell assembly, the two ends of the lifting piece are respectively provided with plug-ins, each of the connecting seats includes a plug interface for inserting the plug-in piece and a buckle interface for buckling the plug-in piece, the plug-in piece is partially inserted into the plug interface and buckled with the buckle interface to assemble the lifting piece to the shell assembly.

[0006] Further, the shell assembly includes an outer shell and an inner shell installed in the outer shell; the inner shell has a first edge turned outward and facing downward on the top, and a first connecting groove is formed between the first edge and the inner shell side wall; the top end of the outer shell side wall abuts against the inner side of the first edge and forms a first heat preservation cavity between the outer shell and the inner shell;

[0007] A plurality of first ribs are arranged in the first connecting groove of the inner shell, a plurality of first slots matched with the first ribs are arranged at the top end of the side wall of the outer shell, and when the inner shell and the outer shell are assembled together, the plurality of first ribs are respectively inserted into the plurality of first slots.

[0008] Further, the outer side of the top of the shell side wall has a step structure, the first edge surrounds the top of the shell side wall, and the bottom of the first edge abuts against the step structure;

[0009] The first rib includes an integrated plug-in portion and a limiting portion, the plug-in portion is located on a side of the first rib close to the first edge, the limiting portion is located on a side of the first rib close to the inner shell, and when the inner shell and the outer shell are assembled together, the plug-in portion is inserted into the first slot, and the limiting portion abuts against the side wall of the first slot.

[0010] Further, the lifting assembly includes a connecting plate, the connecting plate includes a connecting column with a first connecting hole, the inner side wall of the outer shell is provided with a connecting groove for inserting the connecting plate, the outer groove wall of the connecting groove has a second connecting hole, and the connecting seat is provided with a through hole perpendicular to the insertion direction of the connector, and the connecting seat is locked and fixed to the connecting plate by a first fastener passing through the through hole, the second connecting hole, and the first connecting hole.

[0011] Furthermore, the injection molded insulation box also includes a second fastener, a plurality of nut columns extending downward are provided at the bottom of the inner shell, a third connecting hole is provided at a position of the outer shell corresponding to the nut columns, the second fastener passes through the third connecting hole and is threadedly connected to the nut column, and locks the outer shell and the inner shell.

[0012] Furthermore, the box body also includes a plurality of feet, one surface of the feet has a plurality of grooves, the bottom of the shell has a plurality of protrusions, the feet are locked and fixed to the bottom of the shell by second fasteners, and when the feet are fixed to the bottom of the shell, the protrusions are respectively embedded in the grooves.

[0013] Furthermore, there are four nut columns, third connecting holes and feet, the four nut columns are evenly distributed around the bottom of the inner shell, the four feet are evenly distributed around the bottom of the outer shell, a fourth connecting hole is provided in the center of the foot, and a plurality of protrusions are arranged around the fourth connecting hole.

[0014] Furthermore, the cover assembly is provided with a first locking portion, the locking assembly includes a base plate and a buckle, the base plate is simultaneously connected to the first edge of the inner shell and the outer shell side wall through a plurality of third fasteners, the buckle is hinged to the base plate, the buckle includes a second locking portion, and the buckle is locked with the first locking portion through the second locking portion to achieve locking and fixing of the cover assembly and the shell assembly.

[0015] Furthermore, the outer wall of the inner shell is provided with a plurality of convex ribs, the plurality of convex ribs are in contact with the inner wall of the outer shell, and the outer shell also has a plurality of supporting columns, the plurality of supporting columns are evenly distributed on the inner bottom of the outer shell.

[0016] Furthermore, the cover assembly includes an outer cover and an inner cover connected to the outer cover on a side facing the shell assembly, the outer cover edge has a second edge vertically arranged, the inner side of the second edge has a plurality of second ribs, the inner cover has a plurality of second card grooves for inserting the second ribs on a side facing the outer cover, the outer cover is inserted into the second card grooves through the second ribs to form a second insulation cavity with the inner cover, and the injection molding insulation box also includes a plurality of fourth fasteners, and the outer cover is locked and fixed to the inner cover through the plurality of fourth fasteners.

[0017] The beneficial effect of the injection molding insulation box provided by the utility model is that: by setting a lifting component, the lifting piece and the shell component are connected through a connecting seat, and the lifting piece and the shell component can be assembled by simply inserting the connectors at both ends of the lifting piece into the plug-in interface of the connecting seat and buckling them with the buckle interface. The operation is simple and convenient, which can improve the efficiency of installation and disassembly of the injection molding insulation box, and different lifting pieces can be replaced according to different occasions, which is beneficial to improving the application scope of the injection molding insulation box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the injection molding heat preservation box provided by the utility model;

[0019] Figure 2 It is an exploded schematic diagram of the injection molding heat preservation box provided by the utility model;

[0020] Figure 3 yes Figure 2 A magnified schematic diagram of part A;

[0021] Figure 4 It is a schematic diagram of the shell assembly structure of the injection molding heat preservation box provided by the utility model;

[0022] Figure 5 yes Figure 4 A magnified schematic diagram of part B;

[0023] Figure 6 It is a cross-sectional schematic diagram of the injection molding heat preservation box provided by the utility model;

[0024] Figure 7 It is a structural schematic diagram of the lock assembly of the injection molding heat preservation box provided by the utility model;

[0025] Figure 8 It is a structural schematic diagram of the cover assembly of the injection molding heat preservation box provided by the utility model;

[0026] Fig. 9 It is a structural schematic diagram of the inner cover of the injection molding heat preservation box provided by the utility model;

[0027] Fig.10 yes Fig. 9 A magnified schematic diagram of part C;

[0028] In the figure:

[0029] 1. Box body; 11. Shell assembly; 111. Shell; 1111. First card slot; 1112. Connection slot;

[0030] 1113, convex block; 1114, plug block; 1115, support column; 112, inner shell; 1121, first edge; 1122, first rib plate; 1123, nut column; 1124, slot; 1125, convex rib; 1126, plug-in portion; 1127, limit portion; 12, cover assembly; 121, outer cover; 1211, second edge; 1212, second rib plate; 122, inner cover; 1221, second slot; 123, first locking portion; 13, locking assembly; 131, bottom plate;

[0031] 132, buckle; 133, second locking part; 14, foot pad; 2, lifting assembly; 21, lifting member;

[0032] 211, connector; 22, connection seat; 23, connection plate; 231, connection column; 3, storage cavity; 4, first heat preservation cavity; 5, second heat preservation cavity. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0034] See also Figure 1 , which is a schematic diagram of an injection molded insulation box provided by an embodiment of the utility model, an injection molded insulation box includes a box body 1 and a lifting assembly 2, the box body 1 includes a shell assembly 11, a cover assembly 12 and a storage cavity 3 formed by connecting the shell assembly 11 and the cover assembly 12 (see Figure 6 ), one side of the cover assembly 12 is hinged to one side of the shell assembly 11 through a pin, and the box body 1 also includes a lock assembly 13 (see Figure 2), the locking assembly 13 is connected to the side of the housing assembly 11 away from the pin shaft, and the cover assembly 12 is locked and fixed to the housing assembly 11 through the locking assembly 13; the lifting assembly 2 includes a lifting member 21 and a connecting seat 22 for assembling the lifting member 21 to the two sides of the housing assembly 11, the connecting seat 22 is detachably connected to the two sides of the housing assembly 11 through a first fastener, and the two ends of the lifting member 21 are respectively provided with plug-in members 211 (see Figure 3 ), each connecting seat 22 includes a plug interface for inserting the connector 211 and a buckle interface for fastening the connector 211, the buckle interface is located on both sides of the connecting seat 22 and is connected to the plug interface, the connector 211 is partially inserted into the plug interface and buckled with the buckle interface to assemble the lifting member 21 to the shell assembly 11, thereby realizing the installation of the lifting member 21 and the shell assembly 11, through the cooperation of the connector 211 and the connecting seat 22, the efficiency of installation and disassembly of the lifting member 21 and the shell assembly 11 can be effectively improved, and through the convenient installation of the lifting member 21 and the shell assembly 11, different lifting members 21 can be replaced at any time to adapt to different occasions, thereby improving the use range of the injection molding insulation box.

[0035] In one embodiment of the present invention, in order to improve the structural strength and stability of the injection molded heat preservation box, the housing assembly 11 includes an outer shell 111 and an inner shell 112 installed in the outer shell 111 (see Figure 4 ); the top of the inner shell 112 is provided with a first edge 1121 turned outward and facing downward, and a gap is formed between the first edge 1121 and the side wall of the inner shell 112 to form the two side walls of the first connecting groove 1112; the top of the side wall of the outer shell 111 abuts against the inner side of the first edge 1121 and forms a first heat preservation cavity 4 between the outer shell 111 and the inner shell 112 (see Figure 6 ), thereby improving the thermal insulation performance of the injection molded thermal insulation box; a plurality of first ribs 1122 are provided in the first connecting groove 1112 of the inner shell 112 in the vertical direction and parallel to each other, and a plurality of first card grooves 1111 matched with the first ribs 1122 are provided at the top of the side wall of the outer shell 111, and when the inner shell 112 is assembled with the outer shell 111, the plurality of first ribs 1122 are respectively inserted into the plurality of first card grooves 1111 to realize the card connection between the outer shell 111 and the inner shell 112. In order to improve the abutment tightness between the outer shell 111 and the inner shell 112, the injection molded thermal insulation box also includes a plurality of locking members. Specifically, the locking members can be screws or self-tapping screws. The locking members are connected to the position of the locking assembly 13, which can not only realize the connection between the locking assembly 13 and the shell assembly 11, but also strengthen the connection tightness between the inner shell 112 and the outer shell 111.

[0036] In one embodiment of the present invention, a step structure is provided on the top of the side wall of the outer shell 111, and the step structure is connected to the outer wall of the outer shell 111. When the outer shell 111 and the inner shell 112 are connected, the first edge 1121 surrounds the top of the side wall of the outer shell 111, and the bottom of the first edge 1121 abuts against the step structure and is closely abutted against the outer shell 111, so that the outer wall of the first edge 1121 and the outer wall of the outer shell 111 are located in the same plane, so as to keep the surface of the incubator flat; specifically, the first rib plate 1122 includes an integrally arranged plug-in portion 1126 and a stopper portion 1127 (see Fig. 9 and Fig.10 ), the plug-in portion 1126 is located on the side close to the first edge 1121, and the limiting portion 1127 is located on the side close to the inner shell 112. When the inner shell 112 and the outer shell 111 are assembled together, the plug-in portion 1126 is inserted into the first slot 1111, and the limiting portion 1127 abuts against the side wall of the first slot 1111, thereby achieving close abutment between the outer shell 111 and the inner shell 112, thereby improving the mechanical strength of the box body 1.

[0037] In one embodiment of the present invention, the lifting assembly 2 includes a connecting plate 23 (see Figure 5 ), the connecting plate 23 is connected to the inner side wall of the first edge 1121 of the inner shell 112 in the vertical direction, the connecting plate 23 includes a connecting column 231 having a first connecting hole, and the connecting column 231 is connected to the bottom of the connecting plate 23 away from the inner shell 112, and the inner side wall of the outer shell 111 is provided with a connecting groove 1112 (see Figure 4 ), the outer groove wall of the connecting groove 1112 has a second connecting hole, the connecting seat 22 is provided with a through hole perpendicular to the insertion direction of the plug-in component 211, and the first fastener passes through the through hole, the second connecting hole, and the first connecting hole to clamp the connecting seat 22 and the connecting plate 23 on both sides of the connecting groove 1112 and lock them, thereby realizing the connection between the connecting seat 22 and the shell assembly 11, and the first fastener can also strengthen the connection between the outer shell 111 and the inner shell 112, thereby improving the connection stability of the outer shell 111 and the inner shell 112.

[0038] In one embodiment of the present invention, the injection molded insulation box further includes a second fastener. In order to strengthen the connection strength between the outer shell 111 and the inner shell 112, a plurality of nut columns 1123 protruding from the bottom of the inner shell 112 and extending downward are provided at the bottom of the inner shell 112 (see Figure 2), a third connecting hole is provided at a position corresponding to the nut column 1123 at the bottom of the outer shell 111, and the second fastener can pass through the third connecting hole and be threadedly connected to the nut column 1123, so as to lock and fix the outer shell 111 and the inner shell 112, and the nut column 1123 is located in the first insulation cavity 4 formed by the outer shell 111 and the inner shell 112. By setting the nut column 1123, when the inner shell 112 is equipped with an object with a tendency to deform, the space of the first insulation cavity 4 can be kept from being compressed, thereby improving the insulation effect of the injection molding insulation box.

[0039] In one embodiment of the present invention, in order to reduce the noise of the injection molding insulation box, the box body 1 also includes a plurality of feet 14 (see Figure 2 ), one surface of the foot 14 has a plurality of grooves, and the bottom of the shell 111 has a plurality of protrusions 1113 that can be inserted into the grooves, and the second fastener can pass through the foot 14 and the third connecting hole to lock and fix the foot 14 to the bottom of the shell 111, and when the foot 14 is fixed to the bottom of the shell 111, the plurality of protrusions 1113 are respectively embedded in the corresponding grooves to achieve full clamping of the foot 14 and the shell 111, and through the cooperation of the protrusions 1113 and the grooves, the rotation of the foot 14 relative to the shell 111 can be reduced, and the stability of the connection between the foot 14 and the shell 111 is improved. Specifically, the foot 14 can be made of silicone or rubber, so as to improve the quiet effect and anti-slip performance of the injection molded insulation box.

[0040] Specifically, there are four third connecting holes and four feet 14, and four nut columns 1123. The four nut columns 1123 are evenly distributed around the bottom of the outer side of the inner shell 112, and the four feet 14 are evenly distributed around the bottom of the outer shell 111. The bottom of the outer shell 111 is rectangular, and the feet 14 are located at the four corners of the rectangle. The foot 14 is provided with a fourth connecting hole, and the fourth connecting hole is located at the center of the foot 14. Multiple protrusions 1113 are arranged around the fourth connecting hole. Therefore, when the second fastener passes through the foot 14 and the outer shell 111 to connect the foot 14 to the shell assembly 11, uniform force can be achieved on the foot 14 and the protrusion 1113, thereby improving the strength and stability of the injection molded insulation box.

[0041] In one embodiment of the present invention, the cover assembly is provided with a first locking portion 123, and the locking assembly 13 includes a bottom plate 131 and a fastening member 132 (see Figure 7), the bottom plate 131 is connected to the first edge 1121 of the inner shell 112 and the side wall of the outer shell 111 at the same time through a plurality of third fasteners. Specifically, the bottom plate 131 is provided with four fifth connection holes, and the first edge 1121 of the inner shell 112 and the side wall of the outer shell 111 are respectively provided with two sixth connection holes and a seventh connection hole corresponding to the through holes. The plurality of third fasteners respectively pass through the sixth connection hole and the fifth connection hole, the seventh connection hole and the fifth connection hole to assemble the bottom plate 131 on the housing assembly 11. By setting the bottom plate 13 1. While realizing the connection between the locking assembly 13 and the shell assembly 11, the connection tightness between the outer shell 111 and the inner shell 112 is further enhanced. The buckle 132 is hinged to one side of the bottom plate 131. The buckle 132 includes a second locking portion 133. The second locking portion 133 is connected to the side of the buckle 132 close to the hinged bottom plate 131. The buckle 132 is connected to the outer shell 111 through the second locking portion 133 being locked with the first locking portion, thereby realizing the locking and fixing of the buckle 132 and the cover assembly 12.

[0042] In one embodiment of the present invention, in order to improve the strength of the inner shell 112, the outer wall of the inner shell 112 is provided with a plurality of ribs 1125 (see Figure 2 ), multiple ribs 1125 abut against the inner wall of the outer shell 111, thereby reducing the stress deformation of the inner shell 112; the outer shell 111 also has multiple support columns 1115, and the multiple support columns 1115 are evenly distributed on the inner bottom of the outer shell 111, for supporting the bottom of the inner shell 112, and the support columns 1115 and the nut columns 1123 are staggered, which can provide multi-point support for the bottom of the inner shell 112, thereby improving the strength and stability of the inner shell 112.

[0043] In one embodiment of the present invention, the cover assembly 12 includes an outer cover 121 and an inner cover 122 connected to the outer cover 121 on the side facing the housing assembly 11 (see Figure 8 ), the edge of the outer cover 121 has a second edge 1211 set vertically, and the inner side of the second edge 1211 has a plurality of second ribs 1212, and the inner cover 122 has a plurality of second card grooves 1221 for inserting the second ribs 1212 towards the side of the outer cover 121, and the outer cover 121 is inserted into the second card grooves 1221 through the second ribs 1212 to form a second insulation cavity 5 with the inner cover 122, and the injection molding insulation box also includes a plurality of fourth fasteners, and a plurality of through holes are also provided around the outer cover 121 and the inner cover 122, and the plurality of fourth fasteners can pass through the through holes of the outer cover 121 and the inner cover 122 to lock and fix the outer cover 121 and the inner cover 122.

[0044] In an embodiment of the present invention, the first fastener, the second fastener, the third fastener and the fourth fastener may all be fasteners that are convenient to use, such as bolts or rivets.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection molding insulation box, characterized in that: The box body comprises a box main body and a lifting assembly, wherein the box main body comprises a shell assembly, a cover assembly and a storage cavity formed by connecting the shell assembly and the cover assembly, one side of the cover assembly is hinged to one side of the shell assembly through a pin shaft, and the box main body comprises a locking assembly, and the shell assembly and the cover assembly are locked and fixed by the locking assembly; the lifting assembly comprises a lifting piece and a connecting seat for assembling the lifting piece to the two sides of the shell assembly, and the two ends of the lifting piece are respectively provided with plug-ins, and each of the connecting seats comprises a plug interface for inserting the plug-in piece and a buckle interface for buckling the plug-in piece, and the lifting piece is assembled to the shell assembly in a manner that the plug-in piece is partially inserted into the plug interface and buckled with the buckle interface.

2. The injection molding insulation box according to claim 1, characterized in that: The shell assembly comprises an outer shell and an inner shell installed in the outer shell; the inner shell has a first edge turned outward and facing downward on the top, and a first connecting groove is formed between the first edge and the side wall of the inner shell; the top of the side wall of the outer shell abuts against the inner side of the first edge and forms a first heat preservation cavity between the outer shell and the inner shell; A plurality of first ribs are arranged in the first connecting groove of the inner shell, a plurality of first slots matched with the first ribs are arranged at the top end of the side wall of the outer shell, and when the inner shell and the outer shell are assembled together, the plurality of first ribs are respectively inserted into the plurality of first slots.

3. The injection molding insulation box according to claim 2, characterized in that: The outer side of the top of the shell side wall has a step structure, the first edge surrounds the top of the shell side wall, and the bottom of the first edge abuts against the step structure; The first rib includes an integrated plug-in portion and a limiting portion, the plug-in portion is located on a side of the first rib close to the first edge, the limiting portion is located on a side of the first rib close to the inner shell, and when the inner shell and the outer shell are assembled together, the plug-in portion is inserted into the first slot, and the limiting portion abuts against the side wall of the first slot.

4. The injection molding insulation box according to claim 2, characterized in that: The lifting assembly includes a connecting plate, the connecting plate includes a connecting column with a first connecting hole, the inner side wall of the outer shell is provided with a connecting groove for inserting the connecting plate, the outer groove wall of the connecting groove has a second connecting hole, and the connecting seat is provided with a through hole perpendicular to the insertion direction of the connector, and the connecting seat is locked and fixed to the connecting plate by a first fastener passing through the through hole, the second connecting hole, and the first connecting hole.

5. The injection molding insulation box according to claim 3, characterized in that: The injection molded insulation box also includes a second fastener, a plurality of nut columns extending downward are provided at the bottom of the inner shell, a third connecting hole is provided at a position of the outer shell corresponding to the nut columns, the second fastener passes through the third connecting hole and is threadedly connected to the nut column, and locks the outer shell and the inner shell together.

6. The injection molding insulation box according to claim 5, characterized in that: The box body also includes a plurality of feet, one surface of the feet has a plurality of grooves, the bottom of the shell has a plurality of protrusions, the feet are locked and fixed to the bottom of the shell by a second fastener, and when the feet are fixed to the bottom of the shell, the protrusions are respectively embedded in the grooves.

7. The injection molding insulation box according to claim 6, characterized in that: There are four nut columns, third connecting holes and feet, and the four nut columns are evenly distributed around the bottom of the inner shell, and the four feet are evenly distributed around the bottom of the outer shell. A fourth connecting hole is provided in the center of the foot, and multiple protrusions are arranged around the fourth connecting hole.

8. The injection molding insulation box according to claim 7, characterized in that: The cover assembly is provided with a first locking portion, and the locking assembly includes a base plate and a buckle, the base plate is simultaneously connected to the first edge of the inner shell and the side wall of the outer shell through a plurality of third fasteners, the buckle is hinged to the base plate, the buckle includes a second locking portion, and the buckle is locked with the first locking portion through the second locking portion to achieve locking and fixing of the cover assembly and the shell assembly.

9. The injection molding insulation box according to claim 2, characterized in that: The outer wall of the inner shell is provided with a plurality of convex ribs, and the plurality of convex ribs abut against the inner wall of the outer shell. The outer shell also has a plurality of supporting columns, and the plurality of supporting columns are evenly distributed on the inner bottom of the outer shell.

10. The injection molding insulation box according to claim 1, characterized in that: The cover assembly includes an outer cover and an inner cover connected to the outer cover on the side facing the shell assembly, the outer cover edge has a second edge set vertically, the inner side of the second edge has a plurality of second ribs, the inner cover has a plurality of second slots for inserting the second ribs on the side facing the outer cover, the outer cover is inserted into the second slots through the second ribs to form a second insulation cavity with the inner cover, the injection molding insulation box also includes a plurality of fourth fasteners, the outer cover is locked and fixed to the inner cover by the plurality of fourth fasteners.

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