Quick folding carton free of trepanning

Abstract

The utility model relates to the field of cartons, in particular to a trepanning-free rapid folding carton which comprises a bottom plate, a front plate, side plates, a back plate, a top plate and a lining structure. The side, away from the bottom plate, of the side plate is connected with an inner side plate, and the side, close to the front plate, of the inner side plate is provided with a first clamping convex plate; first clamping plates are connected to the two sides of the front plate, and first bayonets are formed in the first clamping plates; the first clamping plate is folded and attached to the front plate, the inner side plate is folded and perpendicular to the bottom plate, and the first clamping convex plate is clamped with the first bayonet; the lining structure is arranged on the bottom plate. Through the arrangement of the first clamping plates on the two sides of the front plate, the first clamping plates are folded and attached to the front plate, the design of the first bayonets in the first clamping plates replaces holes in the paperboard, and after the inner side plates are folded, the first clamping convex plates can be connected with the first bayonets in a clamped mode, so that rapid folding forming is achieved; and meanwhile, the strength of the carton can be improved through the double-layer structure formed by attaching the first clamping plate to the front plate.

Description

Technical Field

[0001] The utility model relates to the field of cartons, in particular to a quick-folding carton without opening holes. Background Art

[0002] Regarding the design of openable and closable cartons, such cartons generally have a box structure with an upper opening formed by a combination of a bottom panel, a front panel, side panels and a back panel, wherein the front panel, side panels and back panel need other means to be fixedly connected, and common connection methods include gluing and a snap-on design between cardboards; the gluing design requires additional glue auxiliary materials, which need to be repeatedly coated during the folding and forming process, and the process is relatively cumbersome; and the snap-on design between cardboards usually opens a socket on the bottom panel, designs an inner panel on the side panel, and sets a plug-in structure on the inner panel to cooperate with the socket, while the front panel and the back panel are inserted between the side panel and the inner panel through connecting panels extending on both sides to achieve the fixation of the three. The above methods require holes to be opened in the cardboard, which affects the strength, sealing and aesthetics of the cardboard. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a quick-folding paper box which can be folded and formed without glue and without holes in the paperboard.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a quick-folding carton without openings, comprising a bottom plate, a front plate, a side plate, a back plate, a top plate and an inner lining structure, the front and back sides of the bottom plate are respectively connected to the front plate and the back plate, the left and right sides of the bottom plate are connected to the side plates, and the top plate is connected to the back plate; the side of the side plate away from the bottom plate is connected to the inner plate, and the side of the inner plate close to the front plate is provided with a first snap-in convex plate; both sides of the front plate are connected to the first snap-in plate, and the first snap-in port is provided on the first snap-in plate; the first snap-in plate is folded and fits onto the front plate, the inner plate is folded perpendicular to the bottom plate, and the first snap-in convex plate is snap-connected with the first snap-in port; the inner lining structure is provided on the bottom plate.

[0005] Furthermore, reinforcing plates are connected between the two sides of the front plate and the first clip-on plate, and the reinforcing plates include a first reinforcing plate and a second reinforcing plate that are folded and connected in sequence in a direction away from the side of the front plate, and the first reinforcing plate and the second reinforcing plate are inserted between the side plate and the inner plate.

[0006] Furthermore, a second snap-in is provided on a side of the inner plate away from the front plate, and the second snap-in is snap-connected with the lining structure.

[0007] Furthermore, the lining structure includes a first lining plate, a second lining plate and a third lining plate, which are folded in sequence along the length direction of the inner side plate until the first lining plate, the second lining plate and the third lining plate are all perpendicular to the bottom plate; second clamping plates that cooperate with the second bayonet are respectively provided on both sides of the first lining plate.

[0008] Furthermore, the second inner lining plate is provided with an inserting plate, and the third inner lining plate is provided with an inserting hole corresponding to the inserting plate.

[0009] Furthermore, the socket includes a first socket and a second socket, and the first socket and the second socket are spaced apart in the length direction of the third inner lining plate; the plug plate passes through the second socket and the first socket in sequence.

[0010] Furthermore, the lining structure also includes a connecting plate, which is connected between the first lining plate and the second lining plate; a third reinforcing plate is provided on the side of the first lining plate away from the connecting plate; the first lining plate, the connecting plate and the second lining plate are folded in sequence until the first lining plate is parallel to the second lining plate and perpendicular to the bottom plate, the connecting plate is parallel to the bottom plate, and the third reinforcing plate is inserted between the first lining plate and the second lining plate.

[0011] Furthermore, fourth reinforcing plates are provided on both sides of the second inner lining plate, and fifth reinforcing plates are provided on both sides of the third inner lining plate; the fourth reinforcing plate and the fifth reinforcing plate are inserted between the side plate and the inner plate.

[0012] Furthermore, a sixth reinforcing plate is provided on the side of the inner plate away from the front plate, and the sixth reinforcing plate is inserted between the first inner lining plate and the second inner lining plate.

[0013] The beneficial effect of the utility model is that, compared with the traditional form of gluing or plugging in holes in paperboard, the present solution is provided with first snap-in plates on both sides of the front plate, the first snap-in plates are folded and attached to the front plate, and the first snap-in opening on the first snap-in plate is designed to replace the opening on the paperboard. After the inner side plate is folded, its first snap-in convex plate can be snap-fitted with the first snap-in opening, so as to realize rapid folding and forming; at the same time, the double-layer structure formed by the first snap-in plate and the front plate can also improve the strength of the carton. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the unfolding of the bottom plate, front plate, side plate, back plate and top plate of the perforated-free quick folding carton according to the specific implementation mode of the utility model;

[0015] Figure 2 It is a schematic diagram of the expansion of the first inner liner board, the second inner liner board and the third inner liner board of the perforated-free quick-folding carton according to the specific implementation mode of the utility model.

[0016] Description of labels:

[0017] 1. Bottom plate;

[0018] 2. front plate; 21. first clamping plate; 22. first bayonet; 23. first reinforcing plate; 24. second reinforcing plate;

[0019] 3. Side plate; 31. Inner plate; 32. First snap-fitting convex plate; 33. Second snap-fitting port; 34. Sixth reinforcing plate;

[0020] 4. Back plate; 5. Top plate;

[0021] 6. First inner lining plate; 61. Second clamping plate; 62. Third reinforcing plate;

[0022] 7. Second inner lining plate; 71. Insert plate; 72. Fourth reinforcing plate;

[0023] 8. The third inner lining plate; 81. The first plug hole; 82. The second plug hole; 83. The fifth reinforcing plate; 9. The connecting plate. DETAILED DESCRIPTION

[0024] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0025] Please refer to Figure 1 and Figure 2 A quick-folding carton without openings comprises a bottom plate 1, a front plate 2, a side plate 3, a back plate 4, a top plate 5 and an inner lining structure, wherein the front and back sides of the bottom plate 1 are respectively connected to the front plate 2 and the back plate 4, the left and right sides of the bottom plate 1 are connected to the side plates 3, and the top plate 5 is connected to the back plate 4; the side of the side plate 3 away from the bottom plate 1 is connected to the inner plate 31, and the side of the inner plate 31 close to the front plate 2 is provided with a first snap-in convex plate 32; both sides of the front plate 2 are connected to the first snap-in plates 21, and the first snap-in ports 22 are provided on the first snap-in plates 21; the first snap-in plates 21 are folded and attached to the front plate 2, the inner plate 31 is folded perpendicular to the bottom plate 1, and the first snap-in convex plate 32 is snap-fitted with the first snap-in ports 22; the inner lining structure is arranged on the bottom plate 1.

[0026] From the above description, it can be seen that the beneficial effect of the utility model is that: compared with the traditional form of gluing or plugging in holes in cardboard, this solution is provided by the first snap-in plates 21 on both sides of the front panel 2, and the first snap-in plates 21 are folded and attached to the front panel 2, and the first snap-in opening 22 on the first snap-in plate 21 is designed to replace the opening on the cardboard. After the inner panel 31 is folded, its first snap-in protrusion 32 can be snapped with the first snap-in opening 22 to achieve rapid folding and forming; at the same time, the double-layer structure formed by the first snap-in plate 21 and the front panel 2 can also improve the strength of the carton.

[0027] Furthermore, reinforcing plates are connected between the two sides of the front panel 2 and the first clip-on plate 21, and the reinforcing plates include a first reinforcing plate 23 and a second reinforcing plate 24 which are folded and connected in sequence in a direction away from the side surface of the front panel 2, and the first reinforcing plate 23 and the second reinforcing plate 24 are inserted between the side panel 3 and the inner panel 31.

[0028] As can be seen from the above description, through the design of the first reinforcing plate 23 and the second reinforcing plate 24, when folded, the first reinforcing plate 23 and the second reinforcing plate 24 are folded in half to form a double-layer paperboard structure, and then inserted between the side panel 3 and the inner panel 31, and the first snap-in protrusion 32 of the inner panel 31 is snapped and fixed with the first snap-in opening 22 of the first snap-in plate 21, so that the space between the side panel 3 and the inner panel 31 is fixed and the double-layer paperboard structure formed by the folding of the first reinforcing plate 23 and the second reinforcing plate 24 is squeezed, providing a clamping and fixing effect, and with the cooperation of the first snap-in protrusion 32 and the first snap-in plate 21, the connection between the front panel 2 and the side panel 3 is further strengthened; at the same time, the double-layer paperboard structure formed by the folding of the first reinforcing plate 23 and the second reinforcing plate 24 also blocks the gap between the front panel 2 and the side panel 3, and also forms a multi-layer paperboard structure at the side panel 3 and the inner panel 31, greatly improving the structural strength.

[0029] Furthermore, a second snap-in 33 is provided on a side of the inner plate 31 away from the front plate 2 , and the second snap-in 33 is snap-connected with the lining structure.

[0030] It can be seen from the above description that the front panel 2, the side panel 3 and the lining structure are integrally connected through the second snap-in design of the inner panel 31 and the lining structure.

[0031] Furthermore, the lining structure includes a first lining panel 6, a second lining panel 7 and a third lining panel 8, which are folded in sequence along the length direction of the inner side panel 31 until the first lining panel 6, the second lining panel 7 and the third lining panel 8 are all perpendicular to the bottom plate 1; second clamping plates 61 cooperating with the second bayonet 33 are respectively provided on both sides of the first lining panel 6.

[0032] It can be seen from the above description that the multi-layer cardboard structure formed by folding the first lining board 6, the second lining board 7 and the third lining board 8, as the back structure of the carton corresponding to the folded front board 2, is against the back board 4, and its multi-layer cardboard design can ensure the structural strength after folding; the second snap-in plate 61 of the first lining board 6 cooperates with the second snap-in 33 of the inner side board 31 to achieve the snap-in fixation of the side board 3 and the lining structure. In addition, the lining structure also includes a lining component adapted to the product shape located in the space formed by the folded structure surrounded by the front board 2, the side board 3 and the first lining board 6, the second lining board 7 and the third lining board 8. This type of lining component is arranged as a post-placed part in the form of being directly placed in the space.

[0033] Furthermore, a plug plate 71 is provided on the second inner lining plate 7 , and a plug hole is provided on the third inner lining plate 8 corresponding to the plug plate 71 .

[0034] From the above description, it can be known that the folding connection between the second inner lining board 7 and the third inner lining board 8 is realized by the cooperation between the plug plate 71 on the second inner lining board 7 and the plug hole on the third inner lining board 8. The design of the plug hole is located on the inner lining structure, and does not serve as an opening on the surface of the carton, and does not affect the strength, sealing and aesthetics of the carton itself.

[0035] Furthermore, the socket includes a first socket 81 and a second socket 82 , and the first socket 81 and the second socket 82 are spaced apart in the length direction of the third inner lining plate 8 ; the plug plate 71 passes through the second socket 82 and the first socket 81 in sequence.

[0036] From the above description, it can be seen that through the design of the first hole 81 and the second hole 82 set in the length direction of the third inner lining plate 8, the plug plate 71 needs to pass through the second hole 82 and the first hole 81 in sequence when docking, so that the third inner lining plate 8 is clamped and fixed multiple times and connected to the third inner lining plate 8 in a winding form, and its connection effect and strength are more excellent.

[0037] Furthermore, the lining structure also includes a connecting plate 9, which is connected between the first lining plate 6 and the second lining plate 7; a third reinforcing plate 62 is provided on the side of the first lining plate 6 away from the connecting plate 9; the first lining plate 6, the connecting plate 9 and the second lining plate 7 are folded in sequence until the first lining plate 6 and the second lining plate 7 are parallel to the bottom plate 1, the connecting plate 9 is parallel to the bottom plate 1, and the third reinforcing plate 62 is inserted between the first lining plate 6 and the second lining plate 7.

[0038] From the above description, it can be seen that through the design of the connecting plate 9, the structure formed by folding the first inner lining plate 6, the second inner lining plate 7 and the third inner lining plate 8 has an upper end surface parallel to the bottom plate 1, and the upper end surface is pressed against the top plate 5; at the same time, the setting of the connecting plate 9 makes there be a gap between the first inner lining plate 6 and the second inner lining plate 7, so that the third reinforcing plate 62 can be inserted therein to improve the structural strength.

[0039] Furthermore, fourth reinforcing plates 72 are provided on both sides of the second inner lining plate 7 , and fifth reinforcing plates 83 are provided on both sides of the third inner lining plate 8 ; the fourth reinforcing plates 72 and the fifth reinforcing plates 83 are inserted between the side plate 3 and the inner plate 31 .

[0040] From the above description, it can be known that, through the insertion and matching design of the fourth reinforcing plate 72 on both sides of the second inner lining plate 7 and the fifth reinforcing plate 83 on both sides of the third inner lining plate 8 between the side panel 3 and the inner panel 31, the gap between the side panel 3 and the inner panel 31 is utilized to fix them through the cooperation of the first clamping plate 21 and the first clamping convex plate 32, so that the structure inserted therein can be squeezed and fixed by the side panel 3 and the inner panel 31, thereby realizing the connection between the lining structure and the side panel 3; at the same time, the folding of the third reinforcing plate 62 and the fourth reinforcing plate 72 also improves the structural strength at the side panel 3.

[0041] Furthermore, a sixth reinforcing plate 34 is provided on a side of the inner plate 31 away from the front plate 2 , and the sixth reinforcing plate 34 is inserted between the first inner lining plate 6 and the second inner lining plate 7 .

[0042] From the above description, it can be seen that by inserting the sixth reinforcing plate 34 between the first lining plate 6 and the second lining plate 7, the connection between the side plate 3 and the lining structure is strengthened, thereby improving the structural strength of the lining structure formed by folding the first lining plate 6, the second lining plate 7 and the third lining plate 8.

[0043] Embodiment 1:

[0044] Application scenarios: In the fixed connection design between the front panel 2, side panels 3 and back panel 4 of the carton, common connection methods include gluing and cardboard clipping design; gluing design requires additional glue auxiliary materials, and repeated coating is required during the folding and forming process, and the process is relatively cumbersome; and the cardboard clipping design usually opens a plug hole on the bottom panel 1, designs an inner panel 31 on the side panel 3, and sets a plug plate 71 structure on the inner panel 31 to cooperate with the plug hole, and the front panel 2 and the back panel 4 are inserted between the side panel 3 and the inner panel 31 through the connecting plates 9 extending on both sides to achieve the fixation of the three. The above methods require opening holes in the cardboard, which affects the strength, sealing and aesthetics of the cardboard.

[0045] like Figure 1 and Figure 2 As shown, the perforated-free quick-folding carton of this embodiment includes a bottom plate 1, a front plate 2, a side plate 3, a back plate 4, a top plate 5 and an inner lining structure, the front and rear sides of the bottom plate 1 are respectively connected to the front plate 2 and the back plate 4, the left and right sides of the bottom plate 1 are connected to the side plates 3, and the top plate 5 is connected to the back plate 4; the side of the side plate 3 away from the bottom plate 1 is connected to the inner plate 31, and the side of the inner plate 31 close to the front plate 2 is provided with a first snap-in convex plate 32; both sides of the front plate 2 are connected to the first snap-in plate 21, and the first snap-in port 22 is provided on the first snap-in plate 21; the first snap-in plate 21 is folded and fitted to the front plate 2, the inner plate 31 is folded perpendicular to the bottom plate 1, and the first snap-in convex plate 32 is snapped with the first snap-in port 22; the inner lining structure is arranged on the bottom plate 1.

[0046] A reinforcing plate is connected between the two sides of the front panel 2 and the first clamping plate 21, and the reinforcing plate includes a first reinforcing plate 23 and a second reinforcing plate 24 which are folded and connected in sequence in a direction away from the side of the front panel 2, and the first reinforcing plate 23 and the second reinforcing plate 24 are inserted between the side panel 3 and the inner panel 31.

[0047] The inner side panel 31 is provided with a second bayonet 33 on one side away from the front panel 2, and the second bayonet 33 is engaged with the inner lining structure. Specifically, the inner lining structure includes a first inner lining panel 6, a second inner lining panel 7 and a third inner lining panel 8, which are folded in sequence along the length direction of the inner side panel 31 until the first inner lining panel 6, the second inner lining panel 7 and the third inner lining panel 8 are all perpendicular to the bottom panel 1; the first inner lining panel 6 is provided with a second bayonet 33 on both sides thereof.

[0048] The second inner lining plate 7 is provided with an inserting plate 71, and the third inner lining plate 8 is provided with an inserting hole corresponding to the inserting plate 71. Specifically, the inserting hole includes a first inserting hole 81 and a second inserting hole 82, and the first inserting hole 81 and the second inserting hole 82 are arranged at intervals in the length direction of the third inner lining plate 8; the inserting plate 71 passes through the second inserting hole 82 and the first inserting hole 81 in sequence.

[0049] The lining structure also includes a connecting plate 9, which is connected between the first lining plate 6 and the second lining plate 7; a third reinforcing plate 62 is provided on the side of the first lining plate 6 away from the connecting plate 9; the first lining plate 6, the connecting plate 9 and the second lining plate 7 are folded in sequence until the first lining plate 6 and the second lining plate 7 are parallel to the bottom plate 1, the connecting plate 9 is parallel to the bottom plate 1, and the third reinforcing plate 62 is inserted between the first lining plate 6 and the second lining plate 7.

[0050] Fourth reinforcing plates 72 are provided on both sides of the second inner lining plate 7 , and fifth reinforcing plates 83 are provided on both sides of the third inner lining plate 8 ; the fourth reinforcing plates 72 and the fifth reinforcing plates 83 are inserted between the side plate 3 and the inner plate 31 .

[0051] A sixth reinforcing plate 34 is disposed on a side of the inner plate 31 away from the front plate 2 . The sixth reinforcing plate 34 is inserted between the first inner lining plate 6 and the second inner lining plate 7 .

[0052] Working principle: The carton as a whole includes a bottom plate 1, a front plate 2, a side plate 3, a back plate 4, a top plate 5 and an inner lining structure, wherein the bottom plate 1, the front plate 2, the side plate 3 and the back plate 4 enclose a box structure with an opening on the upper side, and the inner lining structure is arranged in the box structure, and the top plate 5 covers the opening.

[0053] During the folding and connecting process of the front panel 2, the side panel 3 and the lining structure, the inner panel 31 and the side panel 3 are folded toward the bottom panel 1 in sequence, and the inner panel 31 and the side panel 3 are perpendicular to the bottom panel 1. Then the front panel 2 is folded toward the bottom panel 1 until the front panel 2 is perpendicular to the bottom panel 1. The first reinforcing panel 23 and the second reinforcing panel 24 on both sides of the front panel 2 are folded in half and inserted between the inner panel 31 and the side panel 3. The first snap-in plate 21 is attached to the front panel 2, and its first snap-in opening 22 is snap-fitted and fixed to the first snap-in protrusion 32 on the inner panel 31.

[0054] The lining structure includes a lining structure formed by folding a first lining board 6, a connecting board 9, a second lining board 7 and a third lining board 8, which is located on the back side of the carton and abuts against the back board 4, and a lining component located on the inner side of the box structure and matching the shape of the product. During the folding and forming process of the first inner lining panel 6, the connecting panel 9, the second inner lining panel 7 and the third inner lining panel 8, the first inner lining panel 6 is folded to be perpendicular to the bottom panel 1, the connecting panel 9 is parallel to the bottom panel 1, the second inner lining panel 7 and the third inner lining panel 8 are folded, attached and perpendicular to the bottom panel 1 at the same time, wherein the plug plate 71 provided on the second inner lining panel 7 is simultaneously plugged and matched with the second plug hole 82 and the first plug hole 81 of the third inner lining panel 8, and the third reinforcing plate 62 provided on the side of the first inner lining panel 6 away from the connecting plate 9 is inserted between the first inner lining panel 6 and the second inner lining panel 7 after the above-mentioned structure is formed for structural reinforcement, and the fourth reinforcing plates 72 provided on both sides of the second inner lining panel 7 and the fifth reinforcing plates 83 provided on both sides of the third inner lining panel 8 are simultaneously attached and inserted between the side panel 3 and the inner side panel 31 as the second inner lining panel 7 and the third inner lining panel 8 are folded and attached. The second clamping plates 61 arranged on both sides of the first inner lining plate 6 are clamped with the second clamping openings 33 of the inner panel 31 to connect the inner lining structure with the side panel 3; a sixth reinforcing plate 34 inserted between the first inner lining plate 6 and the second inner lining plate 7 is also provided on the inner panel 31.

[0055] In the above structural design, the connection between the front panel 2 and the side panel 3 is respectively realized by the snap-fitting of the first snap-fitting plate 22 of the first snap-fitting plate 21 and the first snap-fitting protrusion 32, and the plug-in connection between the first reinforcement plate 23 and the second reinforcement plate 24 between the inner panel 31 and the side panel 3; the connection between the side panel 3 and the lining structure is respectively realized by the snap-fitting of the second snap-fitting plate 33 and the second snap-fitting plate 61 on both sides of the first inner lining panel 6, and the plug-in connection between the fourth reinforcement plate 72 on both sides of the second inner lining panel 7 and the fifth reinforcement plate 83 on both sides of the third inner lining panel 8 between the inner panel 31 and the side panel 3, and the plug-in connection between the sixth reinforcement plate 34 on one side of the inner panel 31 and the first inner lining panel 6 and the second inner lining panel 7.

[0056] To summarize, the utility model provides a quick folding carton without opening a hole, compared with the traditional form of gluing or opening a hole in the cardboard for plugging. In this solution, the first snap-in plates are set on both sides of the front plate, and the first snap-in plates are folded and attached to the front plate. The first snap-in slot on the first snap-in plate replaces the hole on the cardboard. After the inner plate is folded, its first snap-in protrusion can be snapped with the first snap-in slot to achieve quick folding and forming. At the same time, the double-layer structure formed by the first snap-in plate and the front plate can also improve the strength of the carton.

[0057] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A quick-folding carton without opening, characterized in that: It includes a bottom plate, a front plate, a side plate, a back plate, a top plate and an inner lining structure, wherein the front and back sides of the bottom plate are respectively connected to the front plate and the back plate, the left and right sides of the bottom plate are connected to the side plates, and the top plate is connected to the back plate; the side of the side plate away from the bottom plate is connected to the inner plate, and the side of the inner plate close to the front plate is provided with a first snap-in convex plate; both sides of the front plate are connected to the first snap-in plate, and the first snap-in port is provided on the first snap-in plate; the first snap-in plate is folded and fitted to the front plate, the inner plate is folded perpendicular to the bottom plate, and the first snap-in convex plate is snap-connected with the first snap-in port; the inner lining structure is provided on the bottom plate.

2. The quick-folding carton without opening according to claim 1, characterized in that: A reinforcing plate is connected between the two sides of the front plate and the first clamping plate, and the reinforcing plate includes a first reinforcing plate and a second reinforcing plate which are folded and connected in sequence in a direction away from the side of the front plate, and the first reinforcing plate and the second reinforcing plate are inserted between the side plate and the inner plate.

3. The quick-folding carton without opening according to claim 1, characterized in that: A second snap-in is provided on one side of the inner plate away from the front plate, and the second snap-in is snap-connected with the lining structure.

4. The quick-folding carton without opening according to claim 3, characterized in that: The lining structure includes a first lining plate, a second lining plate and a third lining plate, which are folded in sequence along the length direction of the inner side plate until the first lining plate, the second lining plate and the third lining plate are all perpendicular to the bottom plate; second clamping plates that cooperate with the second bayonet are respectively provided on both sides of the first lining plate.

5. The perforated-free quick-folding carton according to claim 4, characterized in that: The second inner lining plate is provided with an inserting plate, and the third inner lining plate is provided with an inserting hole corresponding to the inserting plate.

6. The perforated-free quick-folding carton according to claim 5, characterized in that: The plug hole comprises a first plug hole and a second plug hole, and the first plug hole and the second plug hole are arranged at intervals in the length direction of the third inner lining plate; the plug plate passes through the second plug hole and the first plug hole in sequence.

7. The quick-folding carton without opening according to claim 4, characterized in that: The lining structure also includes a connecting plate, which is connected between the first lining plate and the second lining plate; a third reinforcing plate is provided on the side of the first lining plate away from the connecting plate; the first lining plate, the connecting plate and the second lining plate are folded in sequence until the first lining plate is parallel to the second lining plate and perpendicular to the bottom plate, the connecting plate is parallel to the bottom plate, and the third reinforcing plate is inserted between the first lining plate and the second lining plate.

8. The perforated-free quick-folding carton according to claim 7, characterized in that: Fourth reinforcing plates are provided on both sides of the second inner lining plate, and fifth reinforcing plates are provided on both sides of the third inner lining plate; the fourth reinforcing plate and the fifth reinforcing plate are inserted between the side plate and the inner plate.

9. The quick-folding carton without opening according to claim 4, characterized in that: A sixth reinforcing plate is disposed on a side of the inner plate away from the front plate, and the sixth reinforcing plate is inserted between the first inner lining plate and the second inner lining plate.

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