A corner protector assembly for packaging and a packaging box

Abstract

The application provides a corner protector assembly and a packaging box, and belongs to the technical field of packaging boxes. The corner protector assembly comprises: a corner piece which is folded from a corner paperboard, the corner paperboard comprising a middle bottom plate and first side plates located on opposite sides of the middle bottom plate and second side plates located on the other opposite sides; the two first side plates are bent oppositely and respectively form shock-absorbing parts with hollow interiors; the two second side plates are bent oppositely and respectively form side blocking parts, the two side blocking parts are connected with the two shock-absorbing parts respectively, the shock-absorbing parts, the side blocking parts and the middle bottom plate jointly define an open wrapping cavity, and a slot is arranged on the middle bottom plate and communicates the wrapping cavity with the outside; a corner protector piece which is folded from a corner paperboard, the corner protector piece is connected with a side of the middle bottom plate away from the wrapping cavity to block the slot. The corner protector assembly has strong universality, good buffering performance, low cost, is conducive to environmental protection and is convenient to assemble.

Description

Technical Field

[0001] This invention belongs to the field of packaging box technology, and particularly relates to a corner protector component and packaging box for packaging. Background Technology

[0002] Currently, electronic product packaging commonly uses plastic cushioning materials, such as bubble wrap and bubble columns. These materials are mostly non-biodegradable plastics, which are expensive.

[0003] Although some packaging now uses paper cushioning to replace plastic products, such as traditional paper-plastic modular packaging, its cushioning performance is limited, and its versatility is poor due to its one-piece molding. Summary of the Invention

[0004] In view of the above-mentioned problems existing in the prior art, the purpose of this invention is to provide a corner protector assembly and a packaging box for packaging. This corner protector assembly is low in cost, environmentally friendly, has good cushioning performance, and is highly versatile.

[0005] The technical solution adopted in the embodiments of the present invention is as follows:

[0006] A corner protector assembly for packaging, the corner protector assembly comprising:

[0007] The corner protector is made of folded corner cardboard. The corner cardboard includes a central base plate, first side plates on two opposite sides of the central base plate, and second side plates on the other two opposite sides. The two first side plates are bent relative to each other and form hollow shock-absorbing parts. The two second side plates are bent relative to each other and form side baffles. The two side baffles are connected to the two shock-absorbing parts respectively. The two shock-absorbing parts, the two side baffles, and the central base plate together define an open wrapping cavity. The central base plate has a slot that connects the wrapping cavity to the outside.

[0008] The corner protector is made of folded cardboard and is connected to the side of the middle base plate away from the packaging cavity to seal the slot.

[0009] Furthermore, the corner protector cardboard is strip-shaped when unfolded. Three parallel first folds are provided along the length of the cardboard, with the length direction of each first fold perpendicular to the length direction of the cardboard. These three first folds divide the cardboard into a first board, a second board, a third board, and a fourth board. The corner protector cardboard is bent sequentially along the three first folds, and the first and fourth boards are joined together to form a triangular buffer cavity. When the corner protector is connected to the middle base plate of the corner protector, the second board is attached to the middle base plate.

[0010] Furthermore, the free end of the first plate extends outward to form a first ear plate, and the fourth plate is provided with a first groove. The first ear plate can be bent relative to the first plate and extends into the buffer cavity through the first groove when the first plate and the fourth plate are in contact.

[0011] Furthermore, the two sides of the second plate extend outward to form second ear plates, and the middle bottom plate is provided with second grooves on both sides of the slot. After the two second ear plates are bent relative to the second plate, they pass through the two second grooves and extend into the interior of the two shock absorbers.

[0012] Furthermore, a second crease is provided between the first side plate and the middle bottom plate, and a plurality of third creases are provided on the first side plate at intervals, which are parallel to the second creases respectively. By bending the first side plate along the plurality of third creases in sequence, a shock-absorbing part in the shape of an inverted trapezoid can be formed.

[0013] A fourth crease is provided between the second side plate and the middle bottom plate. Multiple fifth creases, which are parallel to the fourth crease, are provided at intervals on the second side plate. By bending the second side plate along the multiple fifth creases in sequence, the two open ends of the shock-absorbing part can be covered and the two shock-absorbing parts can be connected.

[0014] Furthermore, there are three third creases, and these three third creases divide the first side plate into a first unit plate, a second unit plate, a third unit plate, and a fourth unit plate sequentially from the side away from the middle bottom plate; the second unit plate and the third unit plate are provided with interconnected third grooves; after bending the two first side plates, the second unit plates of the two first side plates are respectively opposite to the middle bottom plate, and the third unit plates of the two first side plates are opposite to each other and respectively form two opposing first side walls of the enclosure cavity;

[0015] There are two fifth creases, and the two fifth creases divide the second side plate into a fifth unit plate, a sixth unit plate, and a seventh unit plate in sequence from the side away from the middle bottom plate. The seventh unit plate is provided with two fourth grooves that are perpendicular to the fifth creases. One end of the fourth groove extends to the side of the third unit plate away from the middle bottom plate. After the two second side plates are bent, the fifth unit plate is used to cover the two open ends of the shock-absorbing part. The sixth unit plate is attached to the second unit plate. The two sides of the seventh unit plate extend through the third groove into the interior of the shock-absorbing part so that the part of the seventh unit plate located between the two fourth grooves forms two opposing second side walls of the enclosing cavity.

[0016] Furthermore, the first unit plate has a sixth fold at each end in the direction of the second fold. One end of the sixth fold is connected to the end of the second fold, and the other end of the sixth fold is connected to the end of the third fold between the first unit plate and the second unit plate. The two sixth folds divide the first unit plate into a main board and corner plates located at both ends of the main board. The two corner plates are respectively provided with slits between them and the two fifth unit plates. After the two first side plates are bent to form a shock-absorbing part, the two corner plates are bent inward along the sixth fold, so that when the second side plate is bent, the two fifth unit plates fit with the corner plates.

[0017] Furthermore, the extension direction of the slot on the intermediate base plate is parallel to the length direction of the second crease, and the two ends of the slot extend to the fifth unit plate of the two second side plates respectively.

[0018] Furthermore, the middle portion of each of the two second unit plates is provided with two opposing first virtual knife lines. The first ends of the two first virtual knife lines extend to the third crease between the second unit plate and the first unit plate, respectively. The second ends of the two first virtual knife lines are connected by a second virtual knife line. The second virtual knife line and the two first virtual knife lines define an insert plate, which can be bent along the third crease.

[0019] A packaging box includes a box body for holding products to be packaged, and the packaging box also includes a plurality of corner protector components as described in any of the above embodiments, wherein the plurality of corner protector components correspond one-to-one with a plurality of corners of the products to be packaged, and the corners of the products to be packaged can extend into the wrapping cavity of the corner protector components.

[0020] Compared with the prior art, the beneficial effects of the embodiments of the present invention are as follows:

[0021] The corner protector assembly provided by this invention uses the enclosing cavity of the corner protector to wrap the corners of the item to be packaged, and the shock-absorbing part provides excellent shock absorption. The corner protector assembly is made of paper material, which is not only low-cost but also environmentally friendly. Furthermore, both the corner protector and the corner wrapper are folded, making them easy to process, and their size can be adjusted according to the corners of the item, making them highly versatile.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] In drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with or without letter suffixes may indicate different instances of similar parts. The drawings illustrate various embodiments generally by way of example rather than limitation, and are used, together with the description and claims, to explain the disclosed embodiments. Where appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive embodiments of the apparatus or method.

[0024] Figure 1 This is a first-view view of the corner protector assembly according to an embodiment of the present invention;

[0025] Figure 2 This is a second perspective view of the corner protector assembly according to an embodiment of the present invention;

[0026] Figure 3 This is a first-view view of the corner protector according to an embodiment of the present invention;

[0027] Figure 4 This is a second perspective view of the corner protector according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the corner protector in its unfolded state according to an embodiment of the present invention;

[0029] Figure 6 This is a first-view view of the corner protector according to an embodiment of the present invention;

[0030] Figure 7 This is a second perspective view of the corner protector according to an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the corner protector in its unfolded state according to an embodiment of the present invention.

[0032] In the diagram: 1-Corner protector; 10-Middle base plate; 100-Slot; 101-Second slot; 11-First side plate; 110-First unit plate; 111-Second unit plate; 112-Third unit plate; 113-Fourth unit plate; 114-Third slot; 115-Main plate; 116-Corner plate; 12-Second side plate; 120-Fifth unit plate; 121-Sixth unit plate; 122-Seventh unit plate; 123-Fourth slot; 13-Second crease; 14-Third crease; 15-Fourth crease; 16-Fifth crease; 17-Sixth crease; 18-Insertion plate; 2-Corner protector; 21-First crease; 22-First plate; 23-Second plate; 24-Third plate; 25-Fourth plate; 26-First ear plate; 27-First slot; 28-Second ear plate; 3-Wrapping cavity. Detailed Implementation

[0033] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but these are not intended to limit the scope of the invention.

[0034] This invention provides a corner protector assembly for packaging. For example... Figure 1 and Figure 2 As shown, the corner protector assembly mainly consists of two parts: corner protector 1 and corner protector 2. Both corner protector 1 and corner protector 2 are made of folded cardboard.

[0035] like Figures 3 to 5 As shown, the corner protector 1 is folded from corner protector cardboard, which includes a central base plate 10, first side plates 11 located on both sides of the central base plate 10, and second side plates 12 located on the other two sides of the central base plate 10.

[0036] The two first side plates 11 are bent relative to each other to form hollow shock-absorbing sections. The two second side plates 12 are bent relative to each other to form side baffles. The two side baffles are connected to the two shock-absorbing sections to fix the two side baffles.

[0037] Two shock-absorbing parts, two side baffles, and a central base plate 10 together form an open packaging cavity 3. The packaging cavity 3 is used to wrap the corners of the item to be packaged. The two shock-absorbing parts can support the corners of the item and provide shock absorption. The central base plate 10 is provided with a slot 100 that connects the packaging cavity 3 to the outside.

[0038] like Figure 6 and Figure 8 As shown, the corner protector 2 is made of folded corner protector cardboard. The corner protector 2 is connected to the side of the middle base plate 10 away from the side wrapping cavity 3 and seals the slot 100 on the middle base plate 10 to prevent the corners of the item from protruding from the slot 100 to the outside.

[0039] The corner protector assembly provided in this embodiment is used to wrap the corners of items. It not only provides good shock absorption and cushioning for the items, but also, because the corner protector assembly is made of paper material, it is not only low-cost but also environmentally friendly. Furthermore, both corner protector 1 and corner protector 2 are folded, making them easy to process, and their sizes can be adjusted according to the corners of the items, making them highly versatile.

[0040] like Figure 3 and Figure 5 As shown, in some embodiments, a second crease 13 is provided between the two first side panels 11 on the corner cardboard and the middle bottom panel 10. Multiple third creases 14, parallel to the second creases 13, are spaced apart on the first side panels 11 along a direction away from the middle bottom panel 10. Bending the first side panels 11 sequentially along the third creases 14 forms an inverted trapezoidal shock-absorbing section. Both ends of the shock-absorbing section are open along the third creases 14.

[0041] A fourth crease 15 is provided between the two second side panels 12 on the corner cardboard and the middle bottom plate 10. Multiple fifth creases 16, each parallel to the fourth crease 15, are provided on the second side panels 12 at intervals. Bending the second side panels 12 along the multiple fifth creases 16 in sequence can cover the two open ends of the shock-absorbing part and connect the two shock-absorbing parts.

[0042] like Figure 5 As shown, in some embodiments, the number of third creases 14 on the first side plate 11 is three. The three third creases 14 divide the first side plate 11 into a first unit plate 110, a second unit plate 111, a third unit plate 112, and a fourth unit plate 113, starting from the side of the first side plate 11 furthest from the middle base plate 10. The second unit plate 111 and the third unit plate 112 are provided with interconnected third grooves 114.

[0043] like Figure 3 and Figure 4 As shown, after bending the first side plate 11, the second unit plates 111 of the two first side plates 11 are respectively opposite to the intermediate bottom plate 10. The third unit plates 112 of the two first side plates 11 are opposite to each other and respectively form two opposing first sidewalls of the enclosure cavity 3. The fourth unit plates 113 of the two first side plates 11 are fitted with the intermediate bottom plate 10 to improve the stability of the entire shock absorption part.

[0044] Continue as Figure 5 As shown, there are two fifth creases 16 on the second side plate 12. The two fifth creases 16 divide the second side plate 12 into a fifth unit plate 120, a sixth unit plate 121 and a seventh unit plate 122, starting from the side of the second side plate 12 away from the middle bottom plate 10.

[0045] The seventh unit plate 122 forms the free end of the second side plate 12. Two fourth grooves 123 are provided on the seventh unit plate 122, which are perpendicular to the fifth fold 16. One end of the fourth groove 123 extends to the side of the third unit plate 112 away from the middle bottom plate 10.

[0046] When the two second side plates 12 are bent, the fifth unit plate 120 is used to seal the two open ends of the shock-absorbing part. The sixth unit plate 121 fits into the second unit plate 111 of the first side plate 11. The two sides of the seventh unit plate 122 extend through the third groove 114 into the interior of the shock-absorbing part, so that the portion of the seventh unit plate 122 located between the two fourth grooves 123 forms two opposing second sidewalls of the enclosing cavity 3. In this embodiment, the corner protector 2 formed by bending has a compact structure and occupies little space.

[0047] To ensure that the two first side plates 11, after being bent, form an inverted trapezoidal shock-absorbing section. For example... Figure 5As shown, in this embodiment, the first unit plate 110 has a sixth fold 17 at both ends of the extension direction of the second fold 13. One end of the sixth fold 17 is connected to the end of the second fold 13, and the other end of the sixth fold 17 is connected to the end of the third fold 14 between the first unit plate 110 and the second unit plate 111.

[0048] The two sixth creases 17 on the first unit plate 110 divide it into a main plate 115 and corner plates 116 located at both ends of the main plate 115. The main plate 115 is trapezoidal in shape, and the third unit plate 112 is also trapezoidal and mirror-symmetrical to the shape of the main plate 115.

[0049] A slit is provided between the two corner plates 116 and the fifth unit plate 120. After bending the first side plate 11, the two corner plates 116 on the first unit plate 110 can be bent inwards respectively, so that the entire shock-absorbing part is inverted trapezoidal shape. And when bending the second side plate 12, the fifth unit plate 120 in the second side plate 12 can fit against the corner plates 116.

[0050] Of course, in some other embodiments, the sixth crease 17 may not be provided on the first unit plate 110, that is, the main board 115 serves as the first unit plate 110, so the bending of the first side plate 11 to form the shock-absorbing part can directly be an inverted trapezoidal shape.

[0051] like Figure 5 As shown, in this embodiment, the extension direction of the slot 100 on the middle base plate 10 is consistent with the length direction of the second crease 13. The two ends of the slot 100 can extend to the fifth unit plate 120 of the two second side plates 12, respectively.

[0052] In this embodiment, there can be multiple corner protectors 2. Multiple corner protectors 2 can be connected end to end, and the wrapping cavities 3 of two adjacent corner protectors 2 are connected through the slot 100 so that the corner protector 2 can wrap the larger corners of the item.

[0053] It should be noted that, in this embodiment, the first end of the corner protector 2 is the end where the middle bottom plate 10 is located, and the last end is the end where the open end of the enclosing cavity 3 is located.

[0054] To achieve the end-to-end connection of corner protector 2, such as Figure 4 and Figure 5 As shown, in some embodiments, the middle portions of the two first side plates 11 are respectively provided with two opposing first dummy knife lines.

[0055] The first ends of the two first virtual knife lines extend to the third crease 14 between the second unit plate 111 and the first unit plate 110, respectively. The second ends of the two first virtual knife lines are connected by a second virtual knife line.

[0056] Two first and second dotted knife lines define the insert plate 18. When the two first side plates 11 are bent to form a shock-absorbing part, the insert plate 18 can be bent outward along the third crease 14.

[0057] When there are two corner protectors 2, the insert plate 18 on one corner protector 1 can be bent and inserted into the two second slots 101 on the middle base plate 10 of the other corner protector 1, thereby realizing the connection of the two corner protectors 1.

[0058] The number of corner protectors 2 can be determined based on the size of the corners of the item to be packaged. There can be one or more.

[0059] Furthermore, if there are multiple corner protectors 2, the overall size of the multiple corner protectors 2 changes proportionally so that after the multiple corner protectors 2 are connected to each other, the overall shape is the same as the shape of a single corner protector 2, thereby increasing the overall aesthetics.

[0060] like Figures 6 to 8 As shown, in some embodiments, the corner protector cardboard is strip-shaped when unfolded. The corner protector cardboard has three parallel first folds 21 spaced apart along its length. The length direction of the first folds 21 is perpendicular to the length direction of the corner protector cardboard.

[0061] Three first folds 21 divide the corner protector cardboard into a first panel 22, a second panel 23, a third panel 24, and a fourth panel 25. The corner protector base is bent sequentially along the three first folds 21, and the first panel 22 and the fourth panel 25 are then joined together to form a triangular buffer cavity. Correspondingly, the overall shape of the corner protector 2 is also triangular. When the corner protector 2 is connected to the corner protector 1, the second panel 23 is used to fit against the middle base plate 10 of the corner protector 2. The triangular corner protector 2 uses less material and is suitable for placement at the corners of the box to improve the stability of items placed inside the box.

[0062] In some embodiments, the free end of the first plate 22 extends outward to form a first ear plate 26, which is bendable relative to the first plate 22. The fourth plate 25 is provided with a first groove 27. When the first plate 22 and the fourth plate 25 are fitted together, the bent first ear plate 26 can pass through the first groove 27 and extend into the buffer cavity.

[0063] Of course, the first plate 22 and the fourth plate 25 can be fixed and connected by other methods, such as gluing.

[0064] Preferably, the first plate 22 and the fourth plate 25 are the same size to improve the overall aesthetics of the corner protector 2. The second plate 23 and the middle base plate 10 are the same size. Alternatively, all four plates of the corner protector cardboard can be the same size.

[0065] In some embodiments, the two sides of the second plate 23 extend outward to form second ear plates 28. The second ear plates 28 are bendable relative to the second plate 23.

[0066] The middle base plate 10 has second grooves 101 on both sides of the slot 100. When the second plate 23 of the corner protector 2 is attached to the middle base plate 10 of the corner protector 1, the bent second ear plate 28 can pass through the second groove 101 and extend into the interior of the shock absorber. This structure not only facilitates the quick assembly of the corner protector 2 and the corner protector 1, but also realizes the detachable connection between the corner protector 2 and the corner protector 1.

[0067] Additionally, it should be noted that the shape of the corner protector 2 is not limited to the triangle in this embodiment, but can also be other shapes, depending on the shape of the corners where the item is placed inside the box.

[0068] This invention also provides a packaging box. The packaging box includes a box body for holding packaged items and corner protectors as described in any of the above embodiments.

[0069] The number of corner protector components is the same as the number of corners of the item to be packaged. The corners of the item to be packaged can be inserted into the corresponding corner protector component's enclosure cavities 3 to provide shock absorption and protection for the item.

[0070] The above description is intended to be illustrative and not restrictive. Those skilled in the art can make variations, modifications, substitutions, and alterations to the above embodiments within the scope of this disclosure. Moreover, the above examples (or one or more of them) can be used in combination with each other, and these embodiments can be combined with each other in various combinations or arrangements.

Claims

1. A corner protector assembly for packaging, characterized by The corner protector assembly comprises: The corner protector is folded from a corner protector paperboard, the corner protector paperboard comprises a middle bottom plate and a first side plate on each of two opposite sides of the middle bottom plate and a second side plate on the other two opposite sides, two first side plates are oppositely bent and respectively form a shock-absorbing part with a hollow interior; two second side plates are oppositely bent and respectively form a side blocking part, two side blocking parts are connected with two shock-absorbing parts respectively, two shock-absorbing parts, two side blocking parts and the middle bottom plate together define an open wrapping cavity, and a slot is provided on the middle bottom plate and communicates with the wrapping cavity and the outside; A second crease is provided between the first side plate and the middle bottom plate, a plurality of third creases parallel to the second crease are provided on the first side plate at intervals, and the first side plate can be bent along the plurality of third creases in sequence to form a shock-absorbing part in an inverted trapezoidal shape; A fourth crease is provided between the second side plate and the middle bottom plate, a plurality of fifth creases parallel to the fourth crease are provided on the second side plate at intervals, and the second side plate can be bent along the plurality of fifth creases in sequence to cover two open ends of the shock-absorbing part and connect the two shock-absorbing parts; The corner protector is folded from a corner protector paperboard, the corner protector paperboard comprises a middle bottom plate and a first side plate on each of two opposite sides of the middle bottom plate and a second side plate on the other two opposite sides, two first side plates are oppositely bent and respectively form a shock-absorbing part with a hollow interior; two second side plates are oppositely bent and respectively form a side blocking part, two side blocking parts are connected with two shock-absorbing parts respectively, two shock-absorbing parts, two side blocking parts and the middle bottom plate together define an open wrapping cavity, and a slot is provided on the middle bottom plate and communicates with the wrapping cavity and the outside; 2. A corner protector assembly for packaging as defined in claim 1, wherein The corner protector paperboard in an unfolded state has a strip shape, three first creases parallel to each other are provided on the corner protector paperboard along the length direction, the length direction of the first creases is perpendicular to the length direction of the corner protector paperboard, the three first creases divide the corner protector paperboard into a first plate body, a second plate body, a third plate body and a fourth plate body, the corner protector paperboard is bent along the three first creases in sequence and the first plate body and the fourth plate body are connected in abutment to enclose a triangular buffer cavity, and the second plate body is in abutment with the middle bottom plate when the corner protector is connected with the middle bottom plate of the corner protector.

3. A corner protector assembly for packaging as defined in claim 2, wherein A free end of the first plate body extends outward to form a first ear plate, a first cut groove is provided on the fourth plate body, the first ear plate can be bent relative to the first plate body and extends into the buffer cavity through the first cut groove when the first plate body and the fourth plate body are in abutment.

4. A corner protector assembly for packaging as defined in claim 2, wherein Two sides of the second plate body extend outward to form a second ear plate respectively, second cut grooves are provided on the middle bottom plate on both sides of the slot respectively, and the two second ear plates extend into the interiors of the two shock-absorbing parts through the two second cut grooves respectively after being bent relative to the second plate body.

5. A corner protector assembly for packaging as defined in claim 1, wherein, The number of the third creases is three, and the three third creases divide the first side plate from the side away from the middle bottom plate into a first unit plate, a second unit plate, a third unit plate and a fourth unit plate in sequence; the second unit plate and the third unit plate are provided with a third cut groove in communication with each other; after the two first side plates are bent, the second unit plates of the two first side plates are opposite to the middle bottom plate respectively, and the third unit plates of the two first side plates are opposite and respectively form two opposite first side walls of the wrapping cavity. The fifth crease is two in number, and the two fifth creases sequentially divide the second side plate from the side thereof away from the middle bottom plate into a fifth unit plate, a sixth unit plate, and a seventh unit plate; the seventh unit plate is provided with two fourth slits vertically to the fifth crease and spaced apart; one end of the fourth slit extends to the side of the seventh unit plate away from the middle bottom plate; after the two second side plates are bent, the fifth unit plate is used for covering the two open ends of the shock-absorbing part; the sixth unit plate is attached to the second unit plate; the two sides of the seventh unit plate respectively extend into the interior of the shock-absorbing part through the third slit, so that the part of the seventh unit plate between the two fourth slits forms two opposite second side walls of the wrapping cavity.

6. A corner protector assembly for packaging as defined in claim 5, wherein The two ends of the first unit plate in the extension direction of the second crease are respectively provided with a sixth crease, one end of the sixth crease is connected with the end of the second crease, and the other end of the sixth crease is connected with the end of the third crease between the first unit plate and the second unit plate, and the two sixth creases divide the first unit plate into a main plate and corner plates at the two ends of the main plate, and a slit is arranged between each of the two sixth creases and the two fifth unit plates, and after the two first side plates are bent to form a shock-absorbing part, the two corner plates are respectively bent inward along the sixth creases, so that when the second side plate is bent, the two fifth unit plates are attached to the corner plates.

7. A corner protector assembly for packaging as defined in claim 5, wherein The extension direction of the notch on the middle bottom plate is parallel to the length direction of the second crease, and the two ends of the notch extend to the fifth unit plates of the two second side plates.

8. A corner protector assembly for packaging as defined in claim 5, wherein The middle part of each of the two second unit plates is provided with two opposite first virtual knife lines, the first ends of the two first virtual knife lines extend to the third crease between the second unit plate and the first unit plate, the second ends of the two first virtual knife lines are connected by a second virtual knife line, the second virtual knife line and the two first virtual knife lines define an insertion plate, and the insertion plate can be bent along the third crease.

9. A packaging box comprising a box body for placing a product to be packaged, characterized in that The packaging box further comprises a plurality of the corner protector assemblies of any one of claims 1-8, the plurality of corner protector assemblies one-to-one correspond to the plurality of corners of the product to be packaged, and the corners of the product to be packaged can extend into the wrapping cavities of the corner protector assemblies.

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