Packaging box

Abstract

The utility model discloses a packaging box, and belongs to the technical field of packaging boxes. The packaging box comprises a box body, a cover body and a plug connector. An inserting hole is formed in the end, deviating from a first protection plate, of a cover body in the packaging box, two sets of limiting teeth which are oppositely arranged are fixed to the side face of an inserting piece movably connected with a second protection plate, and the maximum distance between the tooth top ends of the two sets of limiting teeth is larger than or equal to the width of the inserting hole. Therefore, in the process of covering the cover body and the box body, the plug connector can be properly deformed to be inserted into the plug hole from the opening area of the plug hole and can be clamped with the side face, facing the cavity, of the cover body, so that the plug connector is not easy to pull out under the action of external force. And if the plug connector is forcibly pulled out of the plug hole, the limiting teeth in the plug connector are damaged or the opening area of the plug hole is damaged, so that the plug connector is identified by a user, that is, the packing box can effectively identify whether the packing box is unpacked or not, and the packing box has a certain anti-disassembly function and is good in safety performance.

Description

Technical Field

[0001] The present application relates to the technical field of packaging boxes, and in particular to a packaging box. Background Art

[0002] With the rapid growth of the national economy, the packaging industry has developed rapidly. Due to the advantages of environmental protection, recyclability, foldability, excellent printing performance and low cost, packaging boxes (such as packaging cartons) have huge market potential in many industries such as food and medicine.

[0003] However, in order to protect the privacy of consumers, there is an urgent need for a packaging box with an anti-tampering function. Utility Model Content

[0004] The present application provides a packaging box. This embodiment can solve the problem in the prior art of urgently needing a packaging box with an anti-tampering function. The technical solution is as follows:

[0005] In one aspect, a packaging box is provided, comprising:

[0006] Box body, cover body and connector;

[0007] The box body comprises a first protective plate and a second protective plate which are arranged opposite to each other, and a cavity distributed between the first protective plate and the second protective plate;

[0008] One end of the cover is movably connected to the first protective plate, and the other end of the cover has a plug hole that cooperates with the connector, and the opening area of the plug hole is parallel to the second protective plate;

[0009] The first end of the plug-in component is movably connected to the second protective plate, and the side surface of the plug-in component has two sets of limiting teeth arranged opposite to each other, the arrangement direction of the two sets of limiting teeth is parallel to the extension direction of the plug-in hole, and the maximum distance between the tooth tops of the two sets of limiting teeth is greater than or equal to the width of the plug-in hole;

[0010] Wherein, when the packaging box is in a closed state, a portion of the connector is inserted into the plug hole, and the two groups of limiting teeth are used to engage with the side of the cover body facing the cavity.

[0011] Optionally, the plug hole includes: a middle hole, and two plug slots distributed on both sides of the middle hole, and the two plug slots are both connected to the middle hole;

[0012] Wherein, the maximum distance between the top ends of the two groups of limiting teeth is greater than or equal to the distance between the ends of the two insertion slots away from the middle hole.

[0013] Optionally, each group of the limiting teeth includes at least one limiting tooth, and the limiting tooth is arranged obliquely toward the second protective plate.

[0014] Optionally, each group of limiting teeth includes: a first limiting tooth and a second limiting tooth, wherein the first limiting tooth is closer to the second protective plate than the second limiting tooth;

[0015] Wherein, the tooth top of the first limiting tooth protrudes from the tooth top of the second limiting tooth.

[0016] Optionally, the connector includes: a supporting portion, and the two groups of limiting teeth respectively fixed on both sides of the supporting portion; wherein the width of the supporting portion is less than or equal to the width of the middle hole.

[0017] Optionally, the top of the second protective plate has a positioning groove; the connector further comprises: a reinforcing portion fixedly connected to the side surface of the supporting portion;

[0018] Wherein, when the packaging box is in the closed state, the reinforcement portion is located in the positioning groove.

[0019] Optionally, the side of the limiting tooth away from the supporting portion includes: two limiting side surfaces and a connecting arc surface, the connecting arc surface is located between the two limiting side surfaces, and both ends of the connecting arc surface are smoothly connected to the two limiting side surfaces respectively;

[0020] Wherein, the angle between the two limiting side surfaces is an acute angle.

[0021] Optionally, the cover body includes: a top plate, a first inner end plate and a transition plate, one end of the top plate is movably connected to the first protective plate; the first inner end plate is fixedly connected to an end of the top plate facing away from the first protective plate, and the first inner end plate is located in the cavity and is arranged opposite to the second protective plate, and the plug hole is located at the end of the first inner end plate close to the top plate; one end of the transition plate is connected to the inner side wall of the plug hole, the transition plate is flush with the top plate, and the outer boundary shape of the transition plate is the same as the inner boundary shape of the plug hole.

[0022] Optionally, the top plate includes: a top plate body, an auxiliary connecting plate, and a first weak connection portion, wherein one end of the top plate body is movably connected to the first protective plate, the auxiliary connecting plate is connected to the transition plate, and the first weak connection portion is located between the top plate body and the auxiliary connecting plate, and is connected to the top plate body and the auxiliary connecting plate;

[0023] Wherein, the first weak connection portion is configured to separate the auxiliary connection plate and the top plate body under the action of an external force.

[0024] Optionally, the first weak connection portion includes: a plurality of first hollow holes and a plurality of first connecting members, the first connecting members are respectively connected to the top plate body and the auxiliary connecting plate, and at least one first hollow hole is distributed between every two adjacent first connecting members.

[0025] Optionally, the packaging box further includes: a second weak connection portion for connecting the first end portion of the connector and the second protective plate, wherein the second weak connection portion is configured to separate the connector and the second protective plate under the action of an external force.

[0026] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0027] A packaging box may include: a box body, a cover body, and a connector. A plug-in hole is provided at the end of the cover body in the packaging box facing away from the first protective plate, and two sets of limiting teeth are fixed on the side of the connector movably connected to the second protective plate, and the maximum distance between the top ends of the two sets of limiting teeth is greater than or equal to the width of the plug-in hole. In this way, during the process of closing the cover body and the box body, the connector can be appropriately deformed and inserted into the plug-in hole from the opening area of the plug-in hole and can be engaged with the side of the cover body facing the cavity, so that the connector is not easily pulled out under the action of external force. If the connector is forcibly pulled out from the plug-in hole, the limiting teeth in the connector or the opening area of the plug-in hole will be damaged, thereby being identified by the user, that is, the packaging box can effectively identify whether it has been disassembled, has a certain anti-dismantling function, and has good safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 This is a structural schematic diagram of a packaging box in an open and closed state provided by an embodiment of the present application;

[0030] Figure 2 yes Figure 1 The package box is shown in a schematic diagram in the unfolded state;

[0031] Figure 3 This is a schematic diagram of the matching of a plug connector and a plug hole provided in an embodiment of the present application;

[0032] Figure 4 This is a structural schematic diagram of a packaging box provided by an embodiment of the present application in a closed state;

[0033] Figure 5This is a schematic diagram of the unfolding effect of another packaging box provided in an embodiment of the present application.

[0034] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0036] Existing paper boxes, which close with snaps or lids, can be opened and closed repeatedly, making it impossible for customers to tell if a takeout box has been opened. Furthermore, takeout boxes are typically single-use and do not require frequent opening and closing. Existing food boxes can be opened and closed repeatedly, making it impossible to identify whether they have been opened during the delivery process, from the merchant's shipment to the customer's receipt. This fails to protect the sanitation and safety of the food inside the box.

[0037] Please refer to Figure 1 and Figure 2 , Figure 1 This is a structural diagram of a packaging box in an open and closed state provided by an embodiment of the present application. Figure 2 yes Figure 1 The package box 000 may include a box body 100 , a cover 200 and a connector 300 .

[0038] The box body 100 in the packaging box 000 may have a first protective plate 101 and a second protective plate 102 that are oppositely arranged, and a cavity a1 distributed between the first protective plate 101 and the second protective plate 102 .

[0039] One end of the cover 200 in the packaging box 000 can be movably connected to the first protective plate 101. The other end of the cover 200 can have a plug hole b1 that mates with the connector 300. The opening area of the plug hole b1 can be arranged parallel to the second protective plate 102. It should be noted that the plug hole b1 can communicate with the cavity in the box body 100.

[0040] The first end of the connector 300 in the packaging box 000 can be movably connected to the second protective plate 102, and the side of the connector 300 can have two sets of limiting teeth 301 arranged opposite to each other. The arrangement direction of the two sets of limiting teeth 301 can be parallel to the extension direction of the plug-in hole b1, and the maximum distance between the tooth tops of the two sets of limiting teeth 301 can be greater than or equal to the width of the plug-in hole b1 in the cover body 200.

[0041] When the packaging box 000 is in the closed state, the part of the connector 300 can be inserted into the plug hole b1, and the two sets of limiting teeth 301 can be used to engage with the side of the cover 200 facing the cavity a1. Figure 2 As shown, the packaging box 000 can be folded and assembled from the unfolded state. When the packaging box 000 is in the closed state, the cover 200 can be used to cover the cavity a1 in the box body 100.

[0042] In the embodiment of the present application, a plug hole b1 is provided at the end of the cover 200 in the packaging box 000 facing away from the first protective plate 101, and two sets of position-limiting teeth 301 are fixed to the side of the connector 300 that is movably connected to the second protective plate 102. The maximum distance between the top ends of the two sets of position-limiting teeth 301 is greater than or equal to the width of the plug hole b1. In this way, during the closing process of the cover 200 and the box body 100, the connector 300 can be appropriately deformed to be inserted from the opening area of the plug hole b1 into the plug hole b1 and can be locked with the side of the cover 200 facing the cavity a1, making it difficult for the connector 300 to be pulled out under the action of external force. If the connector 300 is forcibly pulled out from the plug hole b1, the limiting teeth 301 in the connector 300 or the opening area of the plug hole b1 will be damaged, thereby being identified by the user. That is, the packaging box 000 can effectively identify whether it has been disassembled, has a certain anti-dismantling function, and has good safety performance.

[0043] For example, the packaging box 000 can be a packaging paper box, or can be made of other materials, and the embodiment of the present application does not make any specific limitation on this.

[0044] In summary, the embodiment of the present application provides a packaging box, which may include: a box body, a cover body and a connector. By setting a plug-in hole at the end of the cover body in the packaging box away from the first protective plate, and fixing two sets of relatively set limiting teeth on the side of the connector movably connected to the second protective plate, the maximum distance between the top ends of the two sets of limiting teeth is greater than or equal to the width of the plug-in hole. In this way, during the process of closing the cover body and the box body, the connector can be appropriately deformed and inserted into the plug-in hole from the opening area of the plug-in hole and can be engaged with the side of the cover body facing the cavity, so that the connector is not easily pulled out under the action of external force. If the connector is forcibly pulled out from the plug-in hole, the limiting teeth in the connector or the opening area of the plug-in hole will be damaged, thereby being identified by the user, that is, the packaging box can effectively identify whether it has been disassembled, has a certain anti-dismantling function, and has good safety performance.

[0045] Optional, please refer to Figure 1 and Figure 3 , Figure 3The figure is a schematic diagram of the matching of a plug-in component and a plug-in hole provided in an embodiment of the present application. The plug-in hole b1 in the cover body 200 may include: a central hole b11, and two insertion slots b12 distributed on both sides of the central hole b11. The two insertion slots b12 can both be connected to the central hole b11. The maximum distance between the tooth tips of the two sets of limiting teeth 301 can be greater than or equal to the distance between the ends of the two insertion slots b12 facing away from the central hole b11. In this way, when the plug-in component 300 is inserted into the plug-in hole b1, the plug-in component 300 is aligned with the central hole b11, and the two sets of limiting teeth 301 in the plug-in component 300 can be inserted into the plug-in hole b1 along the insertion slots b12. The height of the insertion slots b12 is relatively small, making it difficult for the plug-in component 300 inserted into the plug-in hole b1 to be pulled out of the plug-in hole b1. It should be noted that the height of the insertion slot b12 may be less than or equal to the thickness of the limiting teeth 301 in the connector 300 , and the height of the middle hole b11 may be greater than or equal to the thickness of the connector 300 .

[0046] In the embodiments of this application, Figure 3 As shown, each group of limiting teeth 301 in the plug-in component 300 may include at least one limiting tooth, and the limiting teeth 301 may be arranged obliquely toward the second protective plate 102. In this way, after the plug-in component 300 is inserted into the plug-in hole b1, the limiting teeth 301 arranged obliquely can further ensure a better limiting effect between the plug-in component 300 and the cover body 200, further ensuring the anti-disassembly function of the packaging box 000. For example, each group of limiting teeth 301 in the plug-in component 300 may include: a first limiting tooth 301a and a second limiting tooth 301b, and the first limiting tooth 301a may be closer to the second protective plate 102 than the second limiting tooth 301b. Among them, the tooth top of the first limiting tooth 301a may protrude from the tooth top of the second limiting tooth 301b.

[0047] In the embodiments of this application, Figure 3 As shown, the connector 300 in the packaging box 000 may include a support portion 302 and two sets of position-limiting teeth 301 fixed to either side of the support portion 302. The width of the support portion 302 may be less than or equal to the width of the middle hole b11. In this case, by setting the width of the support portion 302 in the connector 300 to be less than or equal to the width of the middle hole b11 of the insertion hole b1, the connector 300 can be smoothly inserted into the insertion hole b1 in the cover 200.

[0048] In this application, if Figure 3As shown, the side of each limiting tooth in each set of limiting teeth 301 facing away from the support portion 302 may include: two limiting side surfaces c1 and a connecting arc surface c2. The connecting arc surface c2 may be located between the two limiting side surfaces c1, and the two ends of the connecting arc surface c2 may be smoothly connected to the two limiting side surfaces c1. The angle between the two limiting side surfaces c1 may be an acute angle. In this case, by providing the two mutually connected limiting side surfaces c1 and the connecting arc surface c2 on the side of the limiting tooth 301, the limiting tooth 301 can smoothly pass through the insertion slot b12 of the plug hole b1 and be inserted into the plug hole b1.

[0049] Optional, please refer to Figure 1 and Figure 4 , Figure 4 It is a structural schematic diagram of a packaging box in a closed state provided by an embodiment of the present application. The top of the second protective plate 102 may have a positioning groove d1, and the connector 300 may further include: a reinforcing portion 303 fixedly connected to the side of the support portion 302. Among them, when the packaging box 000 is in the closed state, the reinforcing portion 303 may be located in the positioning groove d1 in the second protective plate 102. In this case, by providing the positioning groove d1 on the top of the second protective plate 102, the side of the support portion 302 is fixedly connected with the reinforcing portion 303, so that the strength of the connector 300 can be effectively increased by the reinforcing portion 303. In addition, during the process of inserting the connector 300 into the plug hole b1, when the reinforcing portion 303 is located in the positioning groove d1 in the second protective plate 102, the operator can know that the connector 300 is plugged in, which improves the operator's user experience.

[0050] In the embodiments of this application, Figure 4 As shown, the cover 200 in the packaging box 000 may include: a top plate 201, a first inner end plate 202, and a transition plate 203. One end of the top plate 201 may be movably connected to the first protective plate 101. The first inner end plate 202 may be fixedly connected to the end of the top plate 201 facing away from the first protective plate 101, and the first inner end plate 202 may be located in the cavity a1 of the box body 100 and arranged opposite the second protective plate 102. The plug hole b1 in the cover 200 may be located at the end of the first inner end plate 202 close to the top plate 201. One end of the transition plate 203 may be connected to the inner side wall of the plug hole b1. The transition plate 203 may be flush with the top plate 201, and the outer boundary shape of the transition plate 203 may be the same as the inner boundary shape of the plug hole b1.

[0051] For example, the cover 200 can have a flattened state and a bent state. When the cover 200 is in the flattened state, the first inner end plate 202 can be flush with the top plate 201, and the transition plate 203 can be located within the insertion hole b1. When the cover 200 is in the bent state, the first inner end plate 202 intersects with the top plate 201 and can be located within the cavity a1. It should be noted that when the cover 200 is in the bent state, the transition plate 203 can intersect with the first inner end plate 202, and the transition plate 203 and the first inner end plate 202 form an insertion gap b12 in the insertion hole b1.

[0052] Optional, such as Figure 4 As shown, the top plate 201 in the cover body 200 may include: a top plate body 201a, an auxiliary connecting plate 201b and a first weak connection portion 201c. One end of the top plate body 201a may be movably connected to the first protective plate 101, one end of the auxiliary connecting plate 201b may be connected to the transition plate 203, and the first weak connection portion 201c may be located between the top plate body 201a and the auxiliary connecting plate 201b and may be connected to the top plate body 201a and the auxiliary connecting plate 201b. The first weak connection portion 201c may be configured to separate the auxiliary connecting plate 201b from the top plate body 201a under the action of an external force. In this way, by setting a first weak connection part 201c between the top plate body 201a and the auxiliary connecting plate 201b, when the user normally unpacks the packaging box 000, pressure can be applied to the auxiliary connecting plate 201b in the direction of the cavity a1, so that the auxiliary connecting plate 201b and the top plate body 201a are disconnected at the first weak connection part 201c, thereby realizing the separation of the top plate body 201a from the box body 100.

[0053] In the examples of this application, please refer to Figure 4 and Figure 5 , Figure 5 : This is a schematic diagram of the effect of unfolding another packaging box provided by an embodiment of the present application. The first weak connection portion 201c may include: a plurality of first hollow holes k1 and a plurality of first connecting members k2, the first connecting members k2 may be connected to the top plate body 201a and the auxiliary connecting plate 201b respectively, and at least one first hollow hole k1 may be distributed between every two adjacent first connecting members k2. In this case, by providing the first hollow holes k1 and the first connecting members k2 distributed at intervals in the first weak connection portion 201c, when the user applies pressure to the auxiliary connecting plate 201b, the auxiliary connecting plate 201b and the top plate body 201a can be disconnected at the first weak connection portion 201c to achieve separation of the top plate body 201a and the auxiliary connecting plate 201b.

[0054] Optional, such as Figure 5As shown, the packaging box 000 further includes: a second weak connection portion 400 for connecting the first end portion of the plug connector 300 and the second protective plate 102. The second weak connection portion 400 can be configured to separate the plug connector 300 and the second protective plate 102 under the action of an external force. In this case, by providing the second weak connection portion 400 between the plug connector 300 and the second protective plate 102, when the user normally disassembles the packaging box 000, pressure can be applied to the plug connector 300 in the direction of the cavity a1, so that the plug connector 300 and the second protective plate 102 are disconnected at the second weak connection portion 400, thereby achieving separation of the cover 200 from the box body 100.

[0055] For example, the second weak link 400 may include: a plurality of second hollow holes and a plurality of second connectors (not shown in the figure), the second connectors may be connected to the second protective plate and the connector respectively, and at least one second hollow hole may be distributed between every two adjacent second connectors.

[0056] In the embodiments of this application, Figure 5 As shown, the second protective plate 102 may include: an external plate 102a, a second inner end plate 102b, and a bent plate 102c located between the top of the external plate 102a and the top of the second inner end plate 102b. The second inner end plate 102b may be located between the external plate 102a and the first protective plate 101, and the second inner end plate 102b is arranged opposite to the external plate 102a. The bent plate 102c may be connected to the top of the external plate 102a and the top of the second inner end plate 102b, respectively. The first end of the connector 300 may be movably connected to the external plate 102a. For example, during the folding and forming process of the packaging box, the external plate 102a is folded once, and the second inner end plate 102b is folded twice relative to the external plate 102a. It should be noted that, as Figure 4 and Figure 5 As shown, the positioning grooves d1 in the second protective plate 102 can be distributed on the bent plate 102c.

[0057] In summary, the embodiment of the present application provides a packaging box, which may include: a box body, a cover body and a connector. By setting a plug-in hole at the end of the cover body in the packaging box away from the first protective plate, and fixing two sets of relatively set limiting teeth on the side of the connector movably connected to the second protective plate, the maximum distance between the top ends of the two sets of limiting teeth is greater than or equal to the width of the plug-in hole. In this way, during the process of closing the cover body and the box body, the connector can be appropriately deformed and inserted into the plug-in hole from the opening area of the plug-in hole and can be engaged with the side of the cover body facing the cavity, so that the connector is not easily pulled out under the action of external force. If the connector is forcibly pulled out from the plug-in hole, the limiting teeth in the connector or the opening area of the plug-in hole will be damaged, thereby being identified by the user, that is, the packaging box can effectively identify whether it has been disassembled, has a certain anti-dismantling function, and has good safety performance.

[0058] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it may be the only layer between the two layers or elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0059] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0060] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A packaging box, characterized in that: include: Box body, cover body and connector; The box body comprises a first protective plate and a second protective plate which are arranged opposite to each other, and a cavity distributed between the first protective plate and the second protective plate; One end of the cover is movably connected to the first protective plate, and the other end of the cover has a plug hole that cooperates with the plug connector, and the opening area of the plug hole is parallel to the second protective plate; The first end of the plug-in component is movably connected to the second protective plate, and the side surface of the plug-in component has two sets of limiting teeth arranged opposite to each other, the arrangement direction of the two sets of limiting teeth is parallel to the extension direction of the plug-in hole, and the maximum distance between the tooth tops of the two sets of limiting teeth is greater than or equal to the width of the plug-in hole; Wherein, when the packaging box is in a closed state, a portion of the connector is inserted into the plug hole, and the two groups of limiting teeth are used to engage with the side of the cover body facing the cavity.

2. The packaging box according to claim 1, characterized in that: The plug-in hole comprises: a middle hole, and two plug-in slots distributed on both sides of the middle hole, and the two plug-in slots are both connected to the middle hole; Wherein, the maximum distance between the tooth tops of the two groups of limiting teeth is greater than or equal to the distance between the ends of the two insertion slots away from the middle hole.

3. The packaging box according to claim 2, characterized in that: Each group of the limiting teeth includes at least one limiting tooth, and the limiting tooth is arranged obliquely toward the second protective plate.

4. The packaging box according to claim 3, characterized in that: Each group of limiting teeth includes: a first limiting tooth and a second limiting tooth, wherein the first limiting tooth is closer to the second protective plate than the second limiting tooth; Wherein, the tooth top of the first limiting tooth protrudes from the tooth top of the second limiting tooth.

5. The packaging box according to claim 2, characterized in that: The connector includes: a supporting portion, and two groups of limiting teeth respectively fixed on both sides of the supporting portion; wherein the width of the supporting portion is less than or equal to the width of the middle hole.

6. The packaging box according to claim 5, characterized in that: The top of the second protective plate has a positioning groove; the connector also includes: a reinforcement portion fixedly connected to the side of the support portion; Wherein, when the packaging box is in the closed state, the reinforcement portion is located in the positioning groove.

7. The packaging box according to claim 5, characterized in that: The side of the limiting tooth away from the supporting portion includes: two limiting side surfaces and a connecting arc surface, the connecting arc surface is located between the two limiting side surfaces, and the two ends of the connecting arc surface are smoothly connected to the two limiting side surfaces respectively; Wherein, the angle between the two limiting side surfaces is an acute angle.

8. The packaging box according to any one of claims 2 to 7, characterized in that: The cover body includes: a top plate, a first inner end plate and a transition plate, one end of the top plate is movably connected to the first protective plate; the first inner end plate is fixedly connected to the end of the top plate facing away from the first protective plate, and the first inner end plate is located in the cavity and is arranged opposite to the second protective plate, and the plug hole is located at the end of the first inner end plate close to the top plate; one end of the transition plate is connected to the inner side wall of the plug hole, the transition plate is flush with the top plate, and the outer boundary shape of the transition plate is the same as the inner boundary shape of the plug hole.

9. The packaging box according to claim 8, characterized in that: The top plate includes: a top plate body, an auxiliary connecting plate, and a first weak connecting portion, wherein one end of the top plate body is movably connected to the first protective plate, the auxiliary connecting plate is connected to the transition plate, and the first weak connecting portion is located between the top plate body and the auxiliary connecting plate and is connected to the top plate body and the auxiliary connecting plate; Wherein, the first weak connection portion is configured to separate the auxiliary connection plate and the top plate body under the action of an external force.

10. The packaging box according to claim 9, characterized in that: The first weak connection portion includes: a plurality of first hollow holes and a plurality of first connecting members, the first connecting members are respectively connected to the top plate body and the auxiliary connecting plate, and at least one first hollow hole is distributed between every two adjacent first connecting members.

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