A paper box

Abstract

The invention discloses a paper box, and relates to the technical field of packaging boxes. The paper box comprises an outer box and an inner box, wherein the inner wall of the outer box is provided with a first abutting portion, the inner box is slidably installed in the outer box through the opening of the outer box in a push-pull manner, and the outer wall of the inner box is provided with an elastic protrusion. The elastic protrusion can abut against the first abutting portion along the pull-out direction, so that the inner box and the outer box are in a locked state, thereby realizing the self-locking of the paper box. Since the elastic protrusion is an elastic deformation structure, when the inner box is put into the outer box, the elastic protrusion automatically abuts against the first abutting portion, and the inner box is clamped in the outer box. When the elastic protrusion is pressed, the elastic protrusion can be staggered with the first abutting portion, so that the inner box and the outer box are in an unlocked state, thereby realizing the unlocking of the paper box. In addition, since the paper box is made of all paper, compared with a box body made of materials such as hardware and plastic, the paper box is easy to recycle and more environmentally friendly, while reducing the manufacturing cost and the manual assembly cost, and improving the production efficiency.

Description

Technical Field

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

[0002] At present, most of the boxes that realize the anti-theft unlocking function are made of some hardware, plastic or other materials. Although the use of the above materials can significantly improve the strength of the box, the box structure is generally more complicated, which increases the manufacturing cost and the manual assembly cost, and the production efficiency is not high. It is not suitable for occasions where only a simple box structure is needed. In addition, when recycling waste, the box structure made of multiple materials needs to separate different materials before recycling, which undoubtedly increases the cost of waste separation and recycling, and is also not conducive to the recycling of waste.

[0003] The boxes currently made of paper materials are often relatively simple and do not have anti-theft unlocking functions. At the same time, the structure is too simple and can only achieve simple opening and closing operations, and the box cannot be self-locked, which poses a safety hazard and may lead to safety accidents.

[0004] Therefore, how to improve the existing paper box to overcome the above problems is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0005] The purpose of the present invention is to provide a paper box that can achieve self-locking and unlocking of the paper box. The paper box is made entirely of paper, is easy to recycle and is more environmentally friendly, reduces manufacturing costs and manual assembly costs, and improves production efficiency.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A paper box, comprising:

[0008] An outer box, wherein the inner wall of the outer box is provided with a first abutment portion;

[0009] An inner box, the inner box is slidably installed in the outer box through the opening of the outer box in a push-pull manner, and the outer wall of the inner box is provided with an elastic protrusion;

[0010] The elastic protrusion can abut against the first abutment portion along the pulling direction so that the inner box and the outer box are in a locked state; when the elastic protrusion is pressed, the elastic protrusion can be offset from the first abutment portion so that the inner box and the outer box are in an unlocked state.

[0011] Optionally, the inner wall of the outer box is provided with a second abutment, the second abutment is located on one side of the first abutment along the pulling direction, and the elastic protrusion can abut against the second abutment along the pulling direction to limit the inner box from being completely pulled out of the outer box.

[0012] Optionally, the elastic protrusion includes:

[0013] A first elastic protrusion that can abut against the first abutting portion;

[0014] Two second elastic protrusions arranged oppositely, and each second elastic protrusion correspondingly abuts against one of the second abutting portions.

[0015] Optionally, the outer box includes an outer box body formed by folding corrugated paper and having an opening at the front side;

[0016] Both the first abutting portion and the second abutting portion are made of corrugated cardboard. The front ends of the first abutting portion and the second abutting portion are connected to the inner wall of the outer box body, and the rear ends incline towards the inner side of the outer box body.

[0017] Optionally, the outer box further includes:

[0018] A second folding top plate connected to one end of the outer box top plate of the outer box body near the front side opening. The second folding top plate can be bent towards the inner side of the outer box body to form the first abutting portion;

[0019] Second folding side plates. The second folding side plates are connected to one ends of the outer box left side plate and the outer box right side plate of the outer box body near the front side opening. The second folding side plates can be bent towards the inner side of the outer box body to form the second abutting portion.

[0020] Optionally, a through hole is provided on the outer box. When the inner box and the outer box are in a locked state, at least part of the elastic protrusion is located in the through hole.

[0021] Optionally, the inner box includes:

[0022] An inner box body formed by folding corrugated paper and having an opening at the top;

[0023] Both the first elastic protrusion and the second elastic protrusion are made of corrugated cardboard. The rear ends of the first elastic protrusion and the second elastic protrusion are connected to the outer wall of the inner box body, and the front ends incline towards the outer box body.

[0024] Optionally, the inner box further includes:

[0025] An extended main board formed by extending upward from the rear end face of the inner box bottom board of the inner box body. The upper end of the extended main board can be bent towards the top of the inner box body to form the first elastic protrusion;

[0026] An extended side plate is provided on both the left and right sides of the extended main board, and the extended side plate can be bent toward the front side of the inner box body to form the second elastic protrusion.

[0027] Optionally, the inner box further comprises:

[0028] A second connecting plate, the inner box left side plate and the inner box right side plate of the inner box body are both extended toward the top surface of the inner box body with a second connecting plate, the second connecting plate is located at the bottom of the first elastic protrusion and props up the first elastic protrusion.

[0029] Optionally, the inner box further comprises:

[0030] A first extension plate, the first extension plate is connected to the front side of the inner box bottom plate of the inner box body, the first extension plate is bent upward, forward, downward and backward in sequence and then bonded and fixed to the inner box bottom plate to form an inner box front side plate with a cavity, the inner box left side plate and the inner box right side plate of the inner box body are respectively connected to the first connecting plates, and the first connecting plates can be inserted into the cavity.

[0031] The beneficial effects of the present invention are:

[0032] The present invention provides a paper box, which comprises an outer box and an inner box, wherein the inner wall of the outer box is provided with a first abutment portion, the inner box is slidably installed in the outer box through the opening of the outer box in a push-pull manner, and the outer wall of the inner box is provided with an elastic protrusion portion. The elastic protrusion portion can abut against the first abutment portion along the pull-out direction, so that the inner box and the outer box are in a locked state, thereby realizing the self-locking of the paper box. Since the elastic protrusion portion is an elastic deformation structure, when the inner box is put into the outer box, the elastic protrusion portion automatically abuts against the first abutment portion, and the inner box is clamped in the outer box. When the elastic protrusion portion is pressed, the elastic protrusion portion can be staggered with the first abutment portion, so that the inner box and the outer box are in an unlocked state, thereby realizing the unlocking of the paper box. In addition, since the paper box is made of all paper, compared with a box body made of materials such as hardware and plastic, the paper box is easy to recycle and more environmentally friendly, while reducing manufacturing costs and manual assembly costs, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic structural diagram of an outer box in an embodiment of the present invention;

[0034] Figure 2 is a schematic diagram of the structure of the inner box in an embodiment of the present invention;

[0035] Figure 3 is a schematic diagram of the structure of the paper box in a closed state according to an embodiment of the present invention;

[0036] Figure 4 is a schematic diagram of the structure of the paper box in an open state according to an embodiment of the present invention;

[0037] Figure 5 It is the paper mold production drawing of the outer box in the embodiment of the present invention;

[0038] Figure 6 It is the paper mold production drawing of the inner box in the embodiment of the present invention.

[0039] In the figure:

[0040] 1. Outer box; 2. Inner box; 3. Pasting component; 4. Silk screen glue;

[0041] 11. Outer box body; 12. Folding plate; 13. First abutting portion; 14. Second abutting portion; 21. Inner box body; 22. Extension plate; 23. Connecting plate; 24. Elastic protruding portion; 25. Pushing and pulling component;

[0042] 111. Left side plate of the outer box; 112. Top plate of the outer box; 113. Right side plate of the outer box; 114. Bottom plate of the outer box; 121. First folding plate; 122. Second folding plate; 211. Left side plate of the inner box; 212. Bottom plate of the inner box; 213. Right side plate of the inner box; 214. Front side plate of the inner box; 221. First extension plate; 222. Second extension plate; 231. First connecting plate; 232. Second connecting plate; 233. Third connecting plate; 241. First elastic protruding portion; 242. Second elastic protruding portion;

[0043] 1121. Through hole; 1221. Second folding top plate; 1222. Second folding side plate; 2121. First inner box bottom plate; 2122. Second inner box bottom plate; 2221. Extension main board; 2222. Extension side board; 2223. Extension inner board. Detailed implementation manners

[0044] To make the technical problems solved by the present invention, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the present invention will be further described below with reference to the drawings and through specific implementation manners.

[0045] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0046] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0047] In the description of this embodiment, the orientation or positional relationships such as "up", "down", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operations, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for differentiation in description and have no special meanings.

[0048] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the convenience of description, only the parts related to the present invention rather than all the structures are shown in the drawings.

[0049] An embodiment of the present invention provides a paper box, as Figure 1-4 shown. This paper box includes an outer box 1 and an inner box 2. The inner box 2 is slidably installed in the outer box 1 in a push-pull manner through the opening of the outer box 1 to realize the opening and closing of the paper box. Since the paper box is made entirely of paper, compared with the boxes made of materials such as hardware and plastics, this paper box is convenient for recycling, more environmentally friendly, and at the same time reduces the manufacturing cost and the manual assembly cost, improving the production efficiency. However, the boxes currently made of paper materials are often relatively simple, without anti-theft unlocking functions, and can only achieve simple opening and closing operations. At the same time, the structure is too simple to realize the self-locking of the box body, posing a safety hazard and possibly leading to safety accidents.

[0050] To solve the above problems, as Figure 1-6As shown, the inner wall of the outer box 1 proposed in this embodiment is provided with a first abutting portion 13, and the outer wall of the inner box 2 is provided with an elastic protrusion 24, and the elastic protrusion 24 can abut against the first abutting portion 13 along the pulling direction, so that the inner box 2 and the outer box 1 are in a locked state, and the self-locking of the paper box is realized. Since the elastic protrusion 24 is an elastic deformation structure, when the inner box 2 is put into the outer box 1, the elastic protrusion 24 automatically abuts against the first abutting portion 13, and the inner box 2 is clamped in the outer box 1. When the elastic protrusion 24 is pressed, the elastic protrusion 24 can be staggered with the first abutting portion 13, so that the inner box 2 and the outer box 1 are in an unlocked state, and the unlocking of the paper box is realized.

[0051] In order to facilitate pressing the elastic protrusion 24, a through hole 1121 is provided on the outer box 1. When the inner box 2 and the outer box 1 are in a locked state, at least part of the elastic protrusion 24 is located in the through hole 1121. The elastic protrusion 24 can be pressed through the through hole 1121, so that the elastic protrusion 24 is staggered with the first abutting portion 13, so that the inner box 2 can be pulled out. Preferably, the through hole 1121 is set to a size that allows a finger to pass through. When using the paper box, the paper box can be held in one hand and the finger can be directly extended from the through hole 1121 to press the elastic protrusion 24 to achieve unlocking. The structure is simple and more in line with usage habits.

[0052] In this embodiment, Figure 1-4 As shown, after unlocking, in order to prevent the inner box 2 from being pulled out of the outer box 1 due to excessive force, the inner wall of the outer box 1 is provided with a second abutting portion 14, which is located on one side of the first abutting portion 13 along the pulling direction, and the elastic protrusion 24 can abut against the second abutting portion 14 along the pulling direction to limit the inner box 2 from being completely pulled out of the outer box 1. After the elastic protrusion 24 is disengaged from the first abutting portion 13 after unlocking, the inner box 2 can move relative to the outer box 1 along one side of the pulling direction, and when the inner box 2 moves to the limit position, the elastic protrusion 24 abuts against the second abutting portion 14 provided on the inner wall of the outer box 1, thereby preventing the inner box 2 from being completely pulled out of the outer box 1, thereby improving the safety of the inner box 2 product.

[0053] Specifically, the elastic protrusions 24 include a first elastic protrusion 241 and two relatively arranged second elastic protrusions 242. The first elastic protrusion 241 can be in contact with the first abutting portion 13, and each second elastic protrusion 242 corresponds to be in contact with a second abutting portion 14. Optionally, the first elastic protrusion 241 is arranged on the top surface of the outer wall of the inner box 2, and correspondingly, the first abutting portion 13 is arranged as the top surface of the inner wall of the outer box 1. On the one hand, it is convenient to press the first elastic protrusion 241 from the top surface of the paper box. On the other hand, it avoids setting the first elastic protrusion 241 that needs to be pressed repeatedly as the bearing surface of the inner box 11, improving the stability of the paper box. In addition, the two second elastic protrusions 242 are arranged on the adjacent sides of the first elastic protrusion 241. By symmetrically arranging the two second elastic protrusions 242 and the second abutting portions 14, when the inner box 2 is pushed and pulled, the inner box 2 can stably and symmetrically contact the inner wall of the outer box 1, with a simple and beautiful structure.

[0054] Preferably, as Figure 4 shown, the dimension of the first elastic protrusion 241 along the pushing and pulling direction of the inner box 2 is not greater than the sum of the dimensions of the second abutting portion 14 and the second elastic protrusion 242 along the pushing and pulling direction of the inner box 2. Since the first elastic protrusion 241 is arranged on the top surface of the outer wall of the inner box 2, in order to avoid the first elastic protrusion 241 being pulled out synchronously with the inner box 2 when the inner box 2 is pulled out, affecting the aesthetic effect of the paper box, the dimension of the first elastic protrusion 241 is limited, so that when the inner box 2 is pulled to the position where the second elastic protrusion 242 is in contact with the second abutting portion 14, that is, the limit position of the inner box 2, the first elastic protrusion 241 is still located inside the outer box 1.

[0055] In this embodiment, a pushing and pulling member 25 is arranged on the inner box 2 to push and pull the inner box 2 through the pushing and pulling member 25. The pushing and pulling member 25 can be arranged as a semi-circular piece or a circular ring structure, so as to easily pull the pushing and pulling member 25 and drive the inner box 2 to move through the pushing and pulling member 25.

[0056] Therefore, as Figure 1-4As shown, the initial state of the paper box is that the inner box 2 is placed in the outer box 1. The working process of the paper box provided in this embodiment is as follows: in the initial state, the first elastic protrusion 241 on the outer wall of the inner box 2 abuts against the first abutment portion 13 of the inner wall of the outer box 1, and the inner box 2 cannot be pulled out by pulling the push-pull component 25, that is, the inner box 2 is locked in the outer box 1; the first elastic protrusion 241 is pressed from the through hole 1121, so that the first elastic protrusion 241 is staggered from the first abutment portion 13, and the inner box 2 can be taken out of the outer box 1 by pulling the push-pull component 25. Pull out; when the inner box 2 is pulled out to a certain extent, the two second elastic protrusions 242 on the outer wall of the inner box 2 are oppositely arranged and abut against the second abutment portions 14 corresponding to the inner wall of the outer box 1, thereby limiting the further movement of the inner box 2. At this time, the product in the inner box 2 is completely exposed to the user; the inner box 2 can be pushed into the outer box 1 by pushing the push-pull component 25. When the inner box 2 is pushed back into the outer box 1, the first elastic protrusion 241 automatically rebounds so that the first elastic protrusion 241 abuts against the first abutment portion 13, thereby realizing automatic locking of the paper box.

[0057] In this embodiment, Figure 1 and Figure 2 As shown, the outer box 1 includes an outer box body 11, which is formed by folding corrugated paper and has an open front side, and the first abutting portion 13 and the second abutting portion 14 are both made of corrugated paper, and the front ends of the first abutting portion 13 and the second abutting portion 14 are connected to the inner wall of the outer box body 11, and the rear ends are inclined toward the inner side of the outer box body 11. That is, the outer box body 11 is folded to form the outer frame of the outer box 1, and the first abutting portion 13 and the second abutting portion 14 are both connected to the outer box body 11 to form a structure on the inner side of the outer box 1 that abuts against the outer side of the inner box 2.

[0058] Specifically, Figure 5 As shown, the outer box body 11 includes an outer box left side plate 111, an outer box top plate 112, an outer box right side plate 113 and an outer box bottom plate 114 connected to each other on the side, and the outer box body 11 with both ends opened can be formed by folding the intersection line between the above outer box plates and folding and fixing the above outer box plates. Preferably, an auxiliary plate 115 can be provided on the side of any outer box plate at the edge position, and the auxiliary plate 115 can be folded and fixed to the outer box plate at the other edge to achieve the folding and fixing of the outer box body 11, and the structure of the outer box body 11 can also be made more stable, and the outer box plate can be provided with multiple layers to increase the structural strength of the outer box 1.

[0059] Further, the outer box 1 further includes a folding plate 12. The folding plate 12 is respectively connected to both sides of the left outer box plate 111, the top outer box plate 112, the right outer box plate 113, and the bottom outer box plate 114 along the pulling-out direction. The folding plate 12 includes a first folding plate 121 and a second folding plate 122. The first folding plate 121 is arranged on the side away from the opening end of the outer box 1. The front surface of the first folding plate 121 is coated with an adhesive member 3 and can press and fold the intersection line between the first folding plate 121 and the above-mentioned outer box plates to form a rear side plate of the outer box and form an outer box 1 with a front-end opening together with the outer box body 11. The adhesive member 3 can be set as double-sided tape, glue, etc., that is, it can meet the requirement of tightly pasting at a specified position inside the paper box, and no specific limitation is made here. The second folding plate 122 is arranged on the side close to the opening end of the outer box 1. The second folding plate 122 includes a second folding top plate 1221 and a second folding side plate 1222. The second folding top plate 1221 is connected to one end of the top outer box plate 112 of the outer box body 11 close to the front opening, and the second folding top plate 1221 can be bent and fixed towards the inside of the outer box body 11 to form a first abutting portion 13. One ends of the left outer box plate 111 and the right outer box plate 113 of the outer box body 11 close to the front opening are both connected to the second folding side plate 1222, and the second folding side plate 1222 can be bent and fixed towards the inside of the outer box body 11 to form a second abutting portion 14.

[0060] Optionally, glue 4 can also be screen-printed on the second folding top plate 1221 and the second folding side plate 1222 to paste on the inside of the outer box body 11 to fix the positions of the first abutting portion 13 and the second abutting portion 14. Through screen printing technology, the glue 4 is precisely coated on the second folding top plate 1221 and the second folding side plate 1222. After the glue dries, a non-drying adhesive film like adhesive tape will be generated, and then it can be joined to the inside of the outer box body 11 in real time. By screen-printing glue 4 on the second folding top plate 1221 and the second folding side plate 1222, the pasting is more tight and environmentally friendly, and the structural strength of the outer box 1 can be increased by adding a layer of non-drying adhesive film.

[0061] Therefore, as Figure 1 and Figure 5As shown, the folding method of the outer box 1 paper mold is as follows: First, press and fold the intersection lines between the auxiliary plate 115, the left outer box plate 111, the top outer box plate 112, the right outer box plate 113, and the bottom outer box plate 114 that are connected in sequence, and fold the above-mentioned outer box plates to form an outer box body 11 with both ends open, that is, make the auxiliary plate 115 overlap on the bottom outer box plate 114; Then, press and fold the intersection lines between the first folding plate 121 and the above-mentioned outer box plates, and fix each layer of the first folding plate 121 through the pasting component 3 covered on the first folding plate 121 to form the rear side plate of the outer box and form an outer box 1 with a front end opening together with the outer box body 11; Finally, press and fold the intersection lines between the second folding plate 122 and the above-mentioned outer box plates, and fix the second folding plate 122 to the inner side of the outer box body 11 through the screen printing glue 4 to form the first abutting portion 13 and the second abutting portion 14, thereby realizing the folding of the outer box 1 paper mold.

[0062] In this embodiment, as Figure 1 and Figure 2 shown, the inner box 2 includes an inner box body 21, and the inner box body 21 is formed by folding corrugated paper and has an open top. The inner box body 21 slides in a push-pull manner through the front side opening of the outer box body 11, and products can be taken and placed through the open top of the inner box body 21. Both the first elastic convex portion 241 and the second elastic convex portion 242 are supported by corrugated cardboard. The rear ends of the first elastic convex portion 241 and the second elastic convex portion 242 are connected to the outer wall of the inner box body 21, and the front ends are inclined towards the outer box body 11. That is, the inner box body 21 is folded to form the outer frame of the inner box 2, and both the first elastic convex portion 241 and the second elastic convex portion 242 are connected to the inner box body 21 to form a structure that abuts against the inner side of the outer box 1 on the outer side of the inner box 2.

[0063] Preferably, since the first elastic convex portion 241, the second elastic convex portion 242, the first abutting portion 13, and the second abutting portion 14 are all made of corrugated paper, the first elastic convex portion 241 and the second elastic convex portion 242 can be set to be inclined in the direction of the opening of the outer box 1, while the first abutting portion 13 and the second abutting portion 14 are inclined in the direction away from the opening of the outer box 1. When the inner box 2 is placed in the outer box body 11, the upturned part of the first elastic convex portion 241 abuts against the upturned part of the first abutting portion 13, which is more conducive to locking the inner box 2 in the outer box 1 and preventing it from coming out. When the inner box 2 is pulled outwards, the second abutting portion 14 abuts against the upturned part of the second elastic convex portion 242 to further improve the abutting effect. In addition, since the first abutting portion 13 and the second abutting portion 14 are set to be inclined structures, they can not only play a guiding role for the elastic convex portion 24, but also make it more convenient to push and pull the inner box 2.

[0064] In this embodiment, as Figure 2 and Figure 6As shown, the inner box body 21 includes an inner left box plate 211, an inner bottom box plate 212, and an inner right box plate 213 with their sides connected. By folding the intersection lines between the above inner box plates and fixing the above inner box plates, an inner box body 21 with an open upper end and both ends can be formed. The inner box 2 further includes an extension plate 22 and a connecting plate 23. The extension plate 22 includes a first extension plate 221. The first extension plate 221 is connected to the front side of the inner bottom box plate 212 of the inner box body 21. After the first extension plate 221 is bent upward, forward, downward, and then backward in sequence, it is pasted and fixed to the inner bottom box plate 212 to form an inner front box plate 214 with a cavity. First connecting plates 231 are respectively connected to the inner left box plate 211 and the inner right box plate 213 of the inner box body 21. The first connecting plates 231 can be inserted into the cavity to support the inner front box plate 214.

[0065] Optionally, the pushing and pulling member 25 can be arranged on the inner front box plate 214 to push and pull the inner box 2 by pulling the inner front box plate 214 through the pushing and pulling member 25. In this embodiment, the pushing and pulling member 25 is arranged on one side of the inner bottom box plate 212 close to the opening of the outer box 1. By pulling the pushing and pulling member 25, the inner box body 21 is driven to move, so that the pushing and pulling force directly acts on the inner box 2, avoiding damage to the inner box 2 due to excessive pushing and pulling force. However, one side of the inner bottom box plate 212 close to the opening of the outer box 1 also needs to be folded to form the inner front box plate 214. In order not to cause a conflict between the inner front box plate 214 and the pushing and pulling member 25, two layers of inner bottom box plates 212 need to be provided to facilitate connecting the inner front box plate 214 and the pushing and pulling member 25 respectively. At the same time, overlapping two layers of inner bottom box plates 212 can also improve the structural strength of the inner box body 21.

[0066] Furthermore, as Figure 6 shown, the two layers of inner bottom box plates 212 provided include a first inner bottom box plate 2121 and a second inner bottom box plate 2122. Among them, the first inner bottom box plate 2121 is connected to the pushing and pulling member 25, and the second inner bottom box plate 2122 is connected to the first extension plate 221. A third connecting plate 233 is also arranged between the above inner box plates. The third connecting plate 233 can connect the inner left box plate 211, the inner bottom box plate 212, and the inner right box plate 213 to form an inner box body 21 with an inner and outer two-layer structure. At the same time, the third connecting plate 233 is arranged inside the inner box body 21 and glue 4 is screen-printed on the third connecting plate 233 to fix the two-layer structure of the inner box body 21. In this embodiment, the inner box body 21 includes a third connecting plate 233, an inner left box plate 211, a first inner bottom box plate 2121, an inner right box plate 213, a third connecting plate 233, and a second inner bottom box plate 2122 with their sides connected in sequence. The intersection lines between the above inner box plates are folded, and the third connecting plate 233 is folded and fixed inside the inner box body 21 along the intersection lines of the third connecting plate 233 with the inner left box plate 211 and the inner right box plate 213, so that the first inner bottom box plate 2121 coincides with the second inner bottom box plate 2122, and a two-layer structure inner box body 21 can be formed.

[0067] In this embodiment, as shown in Figure 2 and Figure 6 , the extension plate 22 further includes a second extension plate 222. The second extension plate 222 is connected to the inner box bottom plate 212 and is disposed on the side away from the outlet direction of the outer box 1. The second extension plate 222 includes an extension main plate 2221 and extension side plates 2222. The extension main plate 2221 extends upward from the rear end surface of the first inner box bottom plate 2121, and when passing through the rear end surface of the first inner box bottom plate 2121, the extension main plate 2221 forms an inner box 2 structure with a top opening with the inner box body 21. The upper end of the extension main plate 2221 can be bent inwardly towards the top of the inner box body 21 to form a first elastic protrusion 241. Extension side plates 2222 are disposed on both the left and right sides of the extension main plate 2221, and the extension side plates 2222 can be bent inwardly towards the front side of the inner box body 21 to form second elastic protrusions 242.

[0068] To fix the extension main plate 2221 to the top of the inner box body 21, the inner box 2 further includes a second connecting plate 232. Second connecting plates 232 extend from the inner box left side plate 211 and the inner box right side plate 213 of the inner box body 21 towards the top surface of the inner box body 21. The second connecting plates 232 are located at the bottom of the first elastic protrusion 241 and support the first elastic protrusion 241 upward. A pasting member 3 is coated on the surface of the second connecting plate 232 to paste the top surface of the second connecting plate 232 to the bottom surface of the first elastic protrusion 241 to fix the first elastic protrusion 241. Preferably, to improve the pressing strength of the first elastic protrusion 241, an extension inner plate 2223 is connected to the second inner box bottom plate 2122. The extension inner plate 2223 extends upward from the second inner box bottom plate 2122. The upper end of the extension inner plate 2223 can be bent inwardly towards the top of the inner box body 21 and is disposed inside the extension main plate 2221. The second connecting plate 232 is disposed between the extension inner plate 2223 and the extension main plate 2221 to enhance the structural strength of the first elastic protrusion 241. In addition, to improve the tightness of the connection between the extension inner plate 2223 and the extension main plate 2221, a pasting member 3 is provided at the position of the rear end surface of the inner box, that is, the back surface of the extension main plate 2221 and / or the front surface of the extension inner plate 2223 can be coated with the pasting member 3 to tightly connect the extension inner plate 2223 and the extension main plate 2221 at the position of the rear end surface of the inner box, so as to further improve the tightness of the paper box.

[0069] Therefore, as shown in Figure 2 and Figure 6 , the folding method of the inner box 2 paper film is:

[0070] First step, press and fold the successively connected third connecting plate 233, left inner box plate 211, first inner box bottom plate 2121, right inner box plate 213, third connecting plate 233, and second inner box bottom plate 2122, and fold the third connecting plate 233 inward into the inner box body 21 along the intersection lines of the third connecting plate 233 with the left inner box plate 211 and the right inner box plate 213. Fix the inner box body 21 by screen-printing glue 4 on the third connecting plate 233, so that the first inner box bottom plate 2121 coincides with the second inner box bottom plate 2122 to form an inner box body 21 with two ends and an upper opening.

[0071] Second step, bend the first extension plate 221 successively upward, forward, downward, and backward and then fix it to the first inner box bottom plate 2121 to form an inner box front side plate 214 with a cavity. At the same time, insert the first connecting plate 231 into the cavity to support the inner box front side plate 214 and form an inner box body 21 with a rear end and an upper opening together with the inner box body 21.

[0072] Third step, extend the extended main board 2221 upward from the rear end face of the first inner box bottom plate 2121 and bend its upper end toward the top of the inner box body 21. The extended inner board 2223 also extends upward from the second inner box bottom plate 2122 and is arranged inside the extended main board 2221. Coat the adhesive member 3 on the back of the extended main board 2221 and / or the front of the extended inner board 2223 to form the rear end face of the inner box and constitute an inner box body 21 with a top opening together with the inner box body 21.

[0073] Fourth step, arrange the second connecting plate 232 between the extended inner board 2223 and the extended main board 2221, and fix the extended main board 2221 to the top of the inner box body 21 by coating the adhesive member 3 on the surface of the second connecting plate 232 to form a first elastic protrusion 241. Bend and fix the extended side plate 2222 toward the front side of the inner box body 21 to form a second elastic protrusion 242.

[0074] Put the folded inner box 2 into the folded outer box 1 above to form a complete paper box.

[0075] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A paper box, It is characterized in that include: An outer box (1), the outer box (1) comprising an outer box body (11), the inner wall of the outer box (1) being provided with a first abutment portion (13) and a second abutment portion (14), the second abutment portion (14) being located on one side of the first abutment portion (13) along a pulling-out direction; An inner box (2), the inner box (2) being slidably installed in the outer box (1) through the opening of the outer box (1) in a push-pull manner, and an outer wall of the inner box (2) is provided with an elastic protrusion (24); The elastic protrusion (24) comprises: a first elastic protrusion (241), wherein the first elastic protrusion (241) can abut against the first abutting portion (13) along the pulling direction, so that the inner box (2) and the outer box (1) are in a locked state; when the first elastic protrusion (241) is pressed, the first elastic protrusion (241) can be offset from the first abutting portion (13), so that the inner box (2) and the outer box (1) are in an unlocked state; Two second elastic protrusions (242) arranged opposite to each other, each second elastic protrusion (242) correspondingly abutting against one second abutting portion (14) to limit the inner box (2) from being completely withdrawn from the outer box (1); The inner box (2) comprises: An inner box body (21), the top of the inner box body (21) is open, the rear ends of the first elastic protrusion (241) and the second elastic protrusion (242) are connected to the outer wall of the inner box body (21), and the front ends are inclined toward the outer box body (11); An extended main board (2221) is formed by extending upward from the rear end surface of the inner box bottom board (212) of the inner box body (21), and the upper end of the extended main board (2221) can be bent toward the top of the inner box body (21) to form the first elastic protrusion (241); A second connecting plate (232), the inner box left side plate (211) and the inner box right side plate (213) of the inner box body (21) both have a second connecting plate (232) extending toward the top surface of the inner box body (21), the second connecting plate (232) being located at the bottom of the first elastic protrusion (241) and supporting the first elastic protrusion (241) upwards.

2. The paper box according to claim 1, It is characterized in that The outer box body (11) is formed by folding corrugated paper and has an opening at the front side; The first abutting portion (13) and the second abutting portion (14) are both made of corrugated paper, the front ends of the first abutting portion (13) and the second abutting portion (14) are connected to the inner wall of the outer box body (11), and the rear ends are inclined toward the inner side of the outer box body (11).

3. The paper box according to claim 2, It is characterized in that The outer box (1) further comprises: a second folding top plate (1221), the second folding top plate (1221) being connected to an end of the outer box top plate (112) of the outer box body (11) close to the front opening, the second folding top plate (1221) being capable of being bent toward the inside of the outer box body (11) to form the first abutting portion (13); The second folding side plate (1222), one end of the left outer box side plate (111) and the right outer box side plate (113) of the outer box body (11) close to the front opening are both connected to the second folding side plate (1222), and the second folding side plate (1222) can be bent inwardly towards the outer box body (11) to form the second abutting portion (14).

4. The paper box according to claim 1, wherein, a through hole (1121) is provided on the outer box (1), and when the inner box (2) and the outer box (1) are in a locked state, at least part of the elastic protruding portion (24) is located in the through hole (1121).

5. The paper box according to any one of claims 2 and 3, wherein, the inner box body (21) is formed by folding corrugated paper; both the first elastic protruding portion (241) and the second elastic protruding portion (242) are made of corrugated cardboard.

6. The paper box according to claim 5, wherein, the inner box (2) further includes: extended side plates (2222), the extended side plates (2222) are provided on both the left and right sides of the extended main board (2221), and the extended side plates (2222) can be bent forwardly towards the inner box body (21) to form the second elastic protruding portion (242).

7. The paper box according to claim 5, wherein, the inner box (2) further includes: a first extended board (221), the first extended board (221) is connected to the front side of the inner box bottom board (212) of the inner box body (21), and the first extended board (221) is bent upwardly, forwardly, downwardly and then backwardly in sequence and adhesively fixed to the inner box bottom board (212) to form an inner box front side board (214) having a cavity, and first connecting boards (231) are respectively connected to the left inner box side board (211) and the right inner box side board (213) of the inner box body (21), and the first connecting boards (231) can be inserted into the cavity.

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