Foam packaging box with function of preventing cover body from falling off

Abstract

The invention discloses a foam packaging box with a cover body anti-falling function, and relates to the technical field of foam packaging boxes, the foam packaging box comprises a box body, and a box cover is arranged at the upper end of the box body; an auxiliary air bag is flatly laid in the lower portion of the box cover, and the auxiliary air bag is inflated in an unsaturated mode. A movable rotating rod is installed on the inner side of the box cover and forms a winding structure for the auxiliary air bag, a protective film is arranged on the surface of the auxiliary air bag, and the side, away from the winding end, of the auxiliary air bag stretches the protective film downwards along with winding movement to form a protective supporting structure; a clamping hook is arranged at the side end of the movable rotating rod, and the clamping hook rotates along with the movable rotating rod to be attached to the lower end of the attaching protruding edge of the box cover to form a limiting structure for the box cover and the box body. According to the foam packaging box, the simple structure of the movable rotating rod is matched and adjusted with the auxiliary air bag and the clamping hooks to keep the lightweight design of the foam packaging box, the protection effect is improved through the auxiliary air bag, the box cover and the box body are matched and clamped through the clamping hooks, the box cover is prevented from shifting in the transportation process, and safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of foam packaging boxes, in particular to a foam packaging box with a cover anti-falling function. Background Art

[0002] Foam packaging boxes are widely used in the field of item storage and packaging. Many packaging industries tend to choose foam packaging boxes as packaging materials. The main reason is that foam packaging boxes have many advantages, such as strong corrosion resistance, not easy to be damaged, low cost, and recyclable. These characteristics make foam packaging boxes very popular in the packaging industry and are widely used.

[0003] Despite the numerous advantages of existing foam packaging, some issues remain. These packaging boxes typically consist of a simple box body and a top cover. During transportation, the top cover can easily become misaligned with the box body due to bumps or collisions with other objects. Furthermore, during storage and transportation, multiple layers of foam packaging are often stacked together. If the top cover shifts, the foam box can slip, compromising transportation safety.

[0004] There are also foam packaging boxes that prevent the cover from shifting, such as CN217806248U, which prevent the cover from shifting by means of a groove body and external additional structures such as elastic drawstrings. However, the foam packaging box also needs to protect the contents transported inside from vibration during transportation, and the existing protection methods usually lack protection measures against up and down bumping of the contents. When the foam packaging box is loaded with contents, there is usually a certain space between the foam packaging box and the box lid. When it is bumped up and down, it is easy to squeeze the contents, such as fruits, vegetables, and fresh produce. Therefore, the internal protection should also be fully considered when designing the packaging box.

[0005] In view of this, we conducted in-depth research on the above issues, which led to the emergence of this case. Summary of the Invention

[0006] The object of the present invention is to provide a foam packaging box with a cover anti-falling function, so as to solve the problem in the above background technology that the cover of the foam packaging box is easy to fall off and lacks internal protection.

[0007] To achieve the above object, the present invention provides the following technical solution: a foam packaging box with a cover anti-detachment function, comprising a box body, and a box cover is provided at the upper end of the box body; A fitting frame is provided on the inner side of the lower portion of the box cover, and a fitting convex edge is provided on the inner side of the top of the box body, and the fitting frame and the fitting convex edge are provided correspondingly up and down; A filling groove is provided inside the laminating frame, and an auxiliary air bag is laid flat inside the filling groove, and the auxiliary air bag is not saturated with air; A movable rotating rod is installed on the inner side of the box cover, and the movable rotating rod forms a winding structure for the auxiliary airbag. A protective film is provided on the surface of the auxiliary airbag. The side of the auxiliary airbag away from the winding end stretches the protective film downward with the winding movement to form a protective support structure; The side end of the movable rotating rod is provided with a clamping hook, and the clamping hook rotates with the movable rotating rod to fit the lower end of the fitting convex edge of the box cover to form a limiting structure for the box cover and the box body.

[0008] Preferably, the movable rotating rods are symmetrically arranged on the left and right sides of the box cover, and the movable rotating rods on both sides are provided with corresponding auxiliary air bags and snap-on hooks.

[0009] With the above technical solution, when the box lid is closed, the auxiliary airbag partially rolls up to allow gas to enter the outer end and further inflate it. The protective film opens and fits close to the contents for protection. The snap-on hook is used to cooperate with the locking function, effectively preventing the box lid from shifting and sliding, thereby improving transportation safety.

[0010] Preferably, a mounting hole is provided on the front end surface of the box cover, and an insert and a knob are provided in the mounting hole, and the knob is installed on the side end of the movable rotating rod.

[0011] Using the above technical solution, the movable rotating rod is made of high-strength material and can be disassembled and re-used. The knob is designed with a non-slip texture for easy rotation operation. The embedded parts are tightly fitted with the box cover to enhance the overall stability. Through these detail optimizations, the practicality of the foam packaging box is further improved.

[0012] Preferably, the movable rotating rod body includes a winding rod and a movable rod, wherein the movable rod is located at the head and tail ends of the winding rod; The knob forms a telescopic structure at the outer end of the movable rod, and the knob and the movable rod are connected by a key.

[0013] By adopting the above technical solution, the reeling rod and the movable rod correspond to the auxiliary airbag and the snap hook for movable adjustment respectively. At the same time, the movable knob can be used for telescopic adjustment, and the key connection can also be used to drive the flexible rotation of the movable rod as a whole.

[0014] Preferably, a spring is provided between the knob and the insert to form an elastic support structure, and corresponding limit slots and limit protrusions are provided on the surfaces of the knob and the insert respectively. The limit slot on the surface of the pressing knob is elastically supported by the spring to fit the limit protrusion on the surface of the insert to form a limit structure.

[0015] By adopting the above technical solution, the knob and the movable rotating rod are rotationally limited by the limiting card slot and the limiting protrusion. When adjusting, first press the knob to compress the spring so that the limiting card slot disengages the limiting protrusion, and the movable rotating rod can be adjusted by rotating the knob. After rotating into place, the spring resets, and the movable rotating rod is locked by the limiting card slot and the limiting protrusion, thereby locking the auxiliary airbag and the card hook, ensuring that the box cover is tightly closed and protected during transportation to prevent damage to the contents. Preferably, the main body of the clamping hook is a limit hook, and the limit hooks are provided at both the head and tail ends of the movable rotating rod, and the upper end of the limit hook is sleeved on the outer side of the movable rod.

[0016] By adopting the above technical solution, the locking hook is set at the movable rod of the movable rotating rod through the upper end of the limit hook. When the movable rotating rod rotates, the hook part of the lower end of the limit hook can be driven to fit close to the lower edge of the convex edge, thereby limiting the position between the box body and the box cover through the limit hook to prevent the box cover from falling off.

[0017] Preferably, the inner ring of the upper end of the limiting hook is evenly distributed with fitting ratchet teeth, and the surface of the movable rod is distributed with elastic pawls, and the limiting hook forms a one-way rotation structure relative to the movable rod.

[0018] By adopting the above technical solution, the unidirectional rotation of the limit hook on the movable rod can be ensured by cooperating with the fitting ratchet and the elastic pawl. When the box cover is closed and the movable rotating rod is rotated, the limit hook can be driven to rotate normally close to the fitting convex edge for limiting. After that, the movable rotating rod can further rotate unidirectionally. After the movable rotating rod and the knob are limited, the reverse rotation of the limit hook can also be ensured, thereby ensuring that the limit hook locks the box cover.

[0019] Preferably, the auxiliary airbag body is as long as the filling slot, and the auxiliary airbag is divided into a first airbag section, a second airbag section and a folding and rolling section, wherein the first airbag section and the second airbag section are arranged in upper and lower layers in the filling slot.

[0020] Using the above technical solution, the folding and winding section is located in the middle of the first airbag section and the second airbag section. When the folding and winding section is wound, the first airbag section and the second airbag section are synchronously squeezed, so that the first airbag section and the second airbag section can be expanded synchronously, and cooperate with the protective film to be close to the contents, effectively preventing vibration during transportation, especially up and down bumps, from damaging the contents.

[0021] Preferably, the auxiliary airbag and the movable rotating rod are independently detachable, and the surface of the folding and rolling section of the auxiliary airbag is coated with a self-adhesive coating, and the movable rotating rod and the middle part of the auxiliary airbag are adhesively connected by the self-adhesive coating.

[0022] By adopting the above technical solution, users can flexibly remove or install the auxiliary airbag and movable rotating rod according to actual needs. The self-adhesive coating ensures a firm connection, facilitates maintenance and replacement, and further improves the convenience of using the foam box.

[0023] Preferably, the protective film is an annular structure as a whole, and the protective film is arranged around the outside of the auxiliary airbag, and a folding section is reserved on the inner side of the filling groove of the protective film.

[0024] By adopting the above technical solution, the protective film can be conveniently laid flat and stored in the filling slot through the folding section in conjunction with the auxiliary airbag, and can also be flexibly expanded in conjunction with the auxiliary airbag, thereby enhancing the protective effect, simplifying the disassembly and installation steps, and improving the ease of use. When necessary, the coverage range can be adjusted according to the size of the contents, thereby optimizing the protective performance and reducing transportation losses.

[0025] Compared with the prior art, the present invention has the following advantages: the foam packaging box with a lid anti-detachment function adopts a simple structure of a movable rotating rod in conjunction with an adjustable auxiliary airbag and a snap hook to maintain a lightweight design of the foam packaging box. The auxiliary airbag improves the protective effect. The box lid and the box body are snapped together by the snap hook to prevent the box lid from shifting during transportation, thereby improving safety. The specific structural advantages include: 1. A simple adjustment structure with a movable lever is provided. By providing mounting holes, inserts, and knobs at the front end of the lid, the movable lever is easily installed and adjusted. This not only ensures a tight fit between the lid and the box body, but also greatly enhances the practicality and convenience of the foam packaging box. The keyed connection between the knob and the movable lever allows the knob to flexibly drive the movable lever to rotate. At the same time, the coordinated use of a spring, a stopper bump, and a stopper slot ensures the stable positioning of the knob and the movable lever, preventing the lid from loosening or falling off due to bumps during transportation.

[0026] 2. The lid's anti-drop limiter structure, equipped with a snap-on hook, combines with a movable lever to allow simultaneous adjustment of the position of the auxiliary airbag, providing dual protection for the lid's position. The one-way rotation of the limiter hook on the lever not only facilitates the retraction and adjustment of the auxiliary airbag but also effectively prevents accidental opening of the lid during transport, further ensuring the safety of the packaging box.

[0027] 3. The box's internal protective structure, equipped with an auxiliary airbag, features a novel design that integrates the airbag and protective film. The protective film's ring-shaped structure facilitates the placement of the unsaturated airbag within the filling slot. Furthermore, the unsaturated airbag can be flexibly rolled up and expanded within the filling slot by a movable rotating rod, allowing the protective film to be adaptively and flexibly filled within the box. This provides ample protection for the contents and also protects the retaining portion of the hook. This ensures effective protection, allowing the box to handle a variety of contents and complex transportation environments with ease.

[0028] To sum up, this foam packaging box with anti-dropping function of the cover not only solves the problem of easy falling off and lack of internal protection of traditional foam packaging boxes, but also greatly improves the practicality and safety performance of the packaging box through innovative design, providing more reliable protection for the transportation of goods. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the box body and box cover structure of the present invention; Figure 2 This is a schematic diagram of the box body and box cover structure when the auxiliary airbag of the present invention is deployed; Figure 3 This is a schematic diagram of the auxiliary airbag and protective film structure of the present invention; Figure 4 This is a schematic diagram of the auxiliary airbag and protective film expansion structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the box of the present invention; Figure 6 This is a schematic diagram of the internal structure of the box when the auxiliary airbag of the present invention is deployed; Figure 7 For the present invention Figure 6 The enlarged structural diagram at a in the middle; Figure 8 This is a schematic diagram of the internal structure of the insert of the present invention; Figure 9 This is a schematic diagram of the internal structure of the insert when the knob of the present invention is pressed for adjustment; Figure 10 It is a schematic diagram of the overall structure of the present invention.

[0030] In the figure: 1. Box body; 2. Box cover; 3. Fitting frame; 4. Fitting ridge; 5. Filling slot; 6. Auxiliary airbag; 61. First airbag section; 62. Second airbag section; 63. Folding and winding section; 7. Movable rotating rod; 71. Winding rod; 72. Movable rod; 8. Protective film; 81. Folding section; 9. Snap-fit hook; 91. Limiting hook; 92. Fitting ratchet; 93. Elastic pawl; 10. Mounting hole; 11. Insert; 12. Knob; 13. Spring; 14. Limiting slot; 15. Limiting protrusion. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] For example 1, please refer to Figures 1-10The present invention provides a technical solution: a foam packaging box with a cover anti-detachment function, comprising a box body 1, and a box cover 2 is provided at the upper end of the box body 1; a fitting frame 3 is provided on the inner side of the lower side of the box cover 2, and a fitting convex edge 4 is provided on the inner side of the top of the box body 1, and the fitting frame 3 and the fitting convex edge 4 are correspondingly arranged up and down; a filling groove 5 is opened inside the fitting frame 3, and an auxiliary air bag 6 is laid flat inside the filling groove 5, and the auxiliary air bag 6 is not saturated with air; a movable rotating rod 7 is installed on the inner side of the box cover 2, and the movable rotating rod 7 forms a winding structure for the auxiliary air bag 6, and a protective film 8 is provided on the surface of the auxiliary air bag 6, and the side of the auxiliary air bag 6 away from the winding end is stretched downward with the winding movement to form a protective support structure; a clamping hook 9 is provided on the side end of the movable rotating rod 7, and the clamping hook 9 rotates with the movable rotating rod 7 to fit the lower end of the fitting convex edge 4 of the box cover 2 to form a limiting structure for the box cover 2 and the box body 1.

[0033] The movable rotating rod 7 is symmetrically arranged on the left and right sides of the box cover 2, and the movable rotating rod 7 on both sides is provided with corresponding auxiliary airbags 6 and clamping hooks 9. In this embodiment, the clamping hooks 9 are as shown in FIG. Figure 10 There are two symmetrically arranged at the diagonally opposite centers of the box cover 2. When the box cover 2 is closed, the auxiliary airbag 6 is partially wound to allow the gas to enter the outer end and further inflate it, and the protective film 8 is stretched close to the contents for protection. The snap hook 9 is used to cooperate with the locking, effectively preventing the box cover 2 from shifting and sliding, and improving transportation safety. The main body of the movable rotating rod 7 includes a winding rod 71 and a movable rod 72, wherein the movable rod 72 is located at the head and tail ends of the winding rod 71; the knob 12 forms a telescopic structure at the outer end of the movable rod 72, and the knob 12 and the movable rod 72 are connected by a key. The winding rod 71 and the movable rod 72 correspond to the auxiliary airbag 6 and the snap hook 9 for movable adjustment respectively, and at the same time, the movably installed knob 12 can be used for telescopic adjustment, and can also be used in conjunction with the key connection to drive the flexible rotation of the movable rotating rod 7 as a whole.

[0034] Combine Figure 5-Figure 9As shown, the main body of the engaging hook 9 is a limiting hook 91, and the limiting hooks 91 are provided at both ends of the movable rotating rod 7. The upper end of the limiting hook 91 is sleeved on the outer side of the movable rod 72. The engaging hook 9 is provided on the movable rod 72 of the movable rotating rod 7 via the upper end of the limiting hook 91. When the movable rotating rod 7 rotates, the hook portion at the lower end of the limiting hook 91 is driven to contact the lower edge of the flange 4, thereby limiting the position between the box body 1 and the box cover 2 through the limiting hook 91, preventing the box cover 2 from falling out. The inner ring of the upper end of the limiting hook 91 is evenly distributed with contact ratchet teeth 92, and the surface of the movable rod 72 is distributed with elastic pawls 93. The limiting hook 91 forms a one-way rotation structure relative to the movable rod 72. By cooperating with the fitting ratchet 92 and the elastic pawl 93, the limit hook 91 can be ensured to rotate unidirectionally on the movable rod 72. When the box cover 2 is closed and the movable rotating rod 7 is rotated, the limit hook 91 can be driven normally to rotate close to the fitting convex edge 4 for limiting. Then the movable rotating rod 7 can be further rotated unidirectionally. After the movable rotating rod 7 and the knob 12 are limited, the limit hook 91 can also be prevented from reversing, thereby ensuring that the limit hook 91 locks the box cover 2.

[0035] Combine Figure 3-Figure 6 As shown, the main body of the auxiliary airbag 6 is the same length as the filling tank 5, and the auxiliary airbag 6 is divided into a first airbag section 61, a second airbag section 62 and a folding and winding section 63, wherein the first airbag section 61 and the second airbag section 62 are arranged in layers in the filling tank 5. The folding and winding section 63 is located in the middle of the first airbag section 61 and the second airbag section 62. When the folding and winding section 63 is wound, it synchronously squeezes the first airbag section 61 and the second airbag section 62, so that the first airbag section 61 and the second airbag section 62 can be opened synchronously, and cooperate with the protective film 8 to be close to the contents, effectively preventing vibration during transportation, especially up and down bumps, from damaging the contents. The auxiliary airbag 6 and the movable rotating rod 7 are independently disassembled and arranged, and the surface of the folding and winding section 63 of the auxiliary airbag 6 is coated with a self-adhesive coating, and the movable rotating rod 7 and the middle of the auxiliary airbag 6 are adhesively connected by the self-adhesive coating. The user can flexibly disassemble or install the auxiliary airbag 6 and the movable rotating rod 7 according to actual needs. The self-adhesive coating ensures a firm connection, facilitates maintenance and replacement, and further improves the convenience of using the foam box. The protective film 8 is an annular structure as a whole, and the protective film 8 is arranged around the outside of the auxiliary airbag 6, and the protective film 8 is reserved with a folding section 81 on the inside of the filling slot 5. The protective film 8 is conveniently stored in the filling slot 5 with the folding section 81, and is convenient for the auxiliary airbag 6 to be flexibly expanded to enhance the protective effect. The auxiliary airbag 6 and the protective film 8 are both made of plastic film, which can be quickly disassembled and installed to improve the convenience of use. When necessary, the coverage can be adjusted according to the size of the contents to optimize the protection performance and reduce transportation losses.

[0036] The front surface of the box cover 2 is provided with a mounting hole 10, and an insert 11 and a knob 12 are provided within the mounting hole 10. The knob 12 is mounted on the side of the movable rotating rod 7. The movable rotating rod 7 is made of high-strength material and can be repeatedly disassembled and re-used. The knob 12 is designed with a non-slip texture for easy rotation. It fits tightly with the insert 11 and the box cover 2, enhancing overall stability. These detailed optimizations further enhance the practicality of the foam packaging box. A spring 13 is provided between the knob 12 and the insert 11 to form an elastic support structure. The surfaces of the knob 12 and the insert 11 are respectively provided with corresponding limit slots 14 and limit bumps 15. When the limit slot 14 on the surface of the knob 12 is pressed, the elastic support of the spring 13 fits the limit bump 15 on the surface of the insert 11 to form a limit structure. The knob 12 and the movable rotating rod 7 are rotationally limited by the limiting slot 14 and the limiting protrusion 15. When adjusting, first press the knob 12 to compress the spring 13, so that the limiting slot 14 disengages the limiting protrusion 15, and the movable rotating rod 7 can be adjusted by rotating the knob 12. After rotating into place, the spring 13 is reset, and the movable rotating rod 7 is limited and locked by the limiting slot 14 and the limiting protrusion 15, thereby locking the auxiliary airbag 6 and the card hook 9, ensuring that the box cover 2 is tightly closed and protected during transportation to prevent damage to the contents.

[0037] In the second embodiment, the present invention provides an additional technical solution. The auxiliary airbag 6 and the protective film 8 are made of elastic material to replace the plastic film material in the first embodiment. At the same time, the reserved folding section 81 of the protective film 8 is cancelled. The rest of the structure is consistent with the first embodiment. The elastic material of the auxiliary airbag 6 and the protective film 8 of this embodiment is more convenient for adaptive adjustment to the volume of the contents, and can be reused many times, reducing the use of disposable items such as plastic airbags. It should be noted that when reused, the movable rotating rod 7 and the insert 11 can be pulled outward from the mounting hole 10 as a whole to facilitate the resetting and flattening of the auxiliary airbag 6 and the protective film 8, and the insert 11 and the mounting hole 10 are maintained in a detachable interlocking connection by means of key connection or the like, and the movable rotating rod 7 and the folding and rolling section 63 are connected by means of Velcro or the like to ensure that the whole can be detached and reused.

[0038] The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foam packaging box with a cover anti-detachment function, comprising a box body (1), and a box cover (2) is provided at the upper end of the box body (1), characterized in that: A fitting frame (3) is provided on the inner side of the lower portion of the box cover (2), and a fitting convex edge (4) is provided on the inner side of the top portion of the box body (1), and the fitting frame (3) and the fitting convex edge (4) are provided correspondingly in the upper and lower portions; A filling groove (5) is provided inside the laminating frame (3), and an auxiliary air bag (6) is laid flat inside the filling groove (5), and the auxiliary air bag (6) is not saturated with air; A movable rotating rod (7) is installed on the inner side of the box cover (2), and the movable rotating rod (7) forms a reeling structure for the auxiliary airbag (6). A protective film (8) is provided on the surface of the auxiliary airbag (6). The side of the auxiliary airbag (6) away from the reeling end stretches the protective film (8) downward with the reeling movement to form a protective support structure. A snap hook (9) is provided at the side end of the movable rotating rod (7), and the snap hook (9) rotates with the movable rotating rod (7) to fit the lower end of the fitting convex edge (4) of the box cover (2) to form a limiting structure for the box cover (2) and the box body (1).

2. The foam packaging box with a cover anti-detachment function according to claim 1, characterized in that: The movable rotating rods (7) are symmetrically arranged on the left and right sides of the box cover (2), and the movable rotating rods (7) on both sides are provided with corresponding auxiliary air bags (6) and clamping hooks (9).

3. The foam packaging box with a cover anti-detachment function according to claim 1, characterized in that: A mounting hole (10) is provided on the front surface of the box cover (2), and an insert (11) and a knob (12) are provided in the mounting hole (10), wherein the knob (12) is mounted on the side end of the movable rotating rod (7).

4. The foam packaging box with a cover anti-detachment function according to claim 3, characterized in that: The main body of the movable rotating rod (7) comprises a winding rod (71) and a movable rod (72), wherein the movable rod (72) is located at the head and tail ends of the winding rod (71); The knob (12) forms a telescopic structure at the outer end of the movable rod (72), and the knob (12) and the movable rod (72) are connected by a key.

5. The foam packaging box with a cover anti-detachment function according to claim 4, characterized in that: A spring (13) is provided between the knob (12) and the insert (11) to form an elastic support structure, and the surfaces of the knob (12) and the insert (11) are respectively provided with corresponding limit slots (14) and limit protrusions (15), and the limit slots (14) on the surface of the knob (12) are pressed to fit the limit protrusions (15) on the surface of the insert (11) through the elastic support of the spring (13) to form a limit structure.

6. The foam packaging box with a cover anti-detachment function according to claim 4, characterized in that: The main body of the clamping hook (9) is a limit hook (91), and the limit hooks (91) are provided at both the head and tail ends of the movable rotating rod (7), and the upper end of the limit hook (91) is sleeved on the outer side of the movable rod (72).

7. The foam packaging box with a cover anti-detachment function according to claim 5, characterized in that: The inner ring of the upper end of the limiting hook (91) is evenly distributed with fitting ratchet teeth (92), and the surface of the movable rod (72) is distributed with elastic pawls (93), and the limiting hook (91) forms a one-way rotation structure relative to the movable rod (72).

8. The foam packaging box with a cover anti-detachment function according to claim 4, characterized in that: The auxiliary airbag (6) body is of the same length as the filling slot (5), and the auxiliary airbag (6) is divided into a first airbag section (61), a second airbag section (62), and a folding and rolling section (63), wherein the first airbag section (61) and the second airbag section (62) are arranged in layers in the filling slot (5).

9. The foam packaging box with a cover anti-detachment function according to claim 8, characterized in that: The auxiliary airbag (6) and the movable rotating rod (7) are independently detachable and arranged, and the surface of the folding and rolling section (63) of the auxiliary airbag (6) is coated with a self-adhesive coating, and the middle part of the movable rotating rod (7) and the auxiliary airbag (6) are adhesively connected via the self-adhesive coating.

10. The foam packaging box with a cover anti-detachment function according to claim 9, characterized in that: The protective film (8) is an annular structure as a whole, and the protective film (8) is arranged around the outside of the auxiliary airbag (6), and the protective film (8) has a folding section (81) reserved inside the filling groove (5).

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