CN221368042U - Full cardboard formula buffer packaging carton - Google Patents

Abstract

The full-cardboard type buffer packaging carton comprises an outer box body, and a front buffer molding strip, a rear buffer molding strip, a left buffer molding strip and a right buffer molding strip which are arranged in the outer box body, wherein the front buffer molding strip, the rear buffer molding strip, the left buffer molding strip and the right buffer molding strip are formed by folding and overlapping a corrugated board respectively; and a plurality of first cutting lines and second cutting lines which penetrate through the corrugated board and are in an II shape are arranged on each corrugated paper used for each buffer strip, and can be turned into a bearing sheet and an inserting tongue. The utility model is entirely made of paper board, has no harmful substances migration or volatilization, can be recycled, is degradable, is environment-friendly, can play a role in buffering and protecting products, is easy to assemble and form, is simple to operate, takes local materials, and can save materials.

Description

Full cardboard formula buffer packaging carton

Technical Field

The utility model relates to the technical field of packaging cartons, in particular to a full-paperboard type buffer packaging carton.

Background

The paper box is widely applied to packaging and transportation of products or articles, but the buffer performance of the paper box is poor, for example, when the fragile articles needing to be packaged and transported and shockproof articles needing to be packaged and transported, such as ceramics, glass, precise instruments, electronic products and the like, buffer materials such as foaming buffer foam, paper support, bubble paper, bubble bags, bubble cotton particles and the like are usually required to be additionally placed in the paper box to play a role of buffering. However, these materials are made of polymer materials, in which harmful substances such as foaming agents and plasticizers are added, and small molecules are removed or volatilized to affect environmental materials, or the polymer materials are not easily degraded and difficult to recycle, which causes damage to the environment, or the materials are poor in buffering performance, or the weight or cost of the package is greatly increased, and the applicability is poor, especially when the requirements of products and laws and regulations of the product package in the environment are increasingly strict, some package forms are difficult to meet the requirements, so that the development of the package materials or structures meeting the environmental protection requirements and having strong practicability is required.

Disclosure of utility model

The utility model aims to overcome the defects of the prior art and provide the full-paperboard type buffer packaging carton which is made of full paperboard, is easy to assemble and form and is overlapped.

The utility model is realized by the following technical scheme:

The full-cardboard type buffer packaging carton comprises an outer box body and a plurality of buffer profiles arranged in the outer box body, wherein the buffer profiles comprise a front buffer profile, a rear buffer profile, a left buffer profile and a right buffer profile, the front buffer profile, the rear buffer profile, the left buffer profile and the right buffer profile are respectively formed by folding and assembling a corrugated board, the lengths of the front buffer profile and the rear buffer profile are equal, the lengths of the left buffer profile and the right buffer profile are equal, the front buffer profile, the rear buffer profile, the left buffer profile and the right buffer profile are respectively folded into steps with two layers of platforms, the front buffer profile, the rear buffer profile, the left buffer profile and the right buffer profile are clamped in an end-to-end manner (such as through wedge faces), the two layers of platforms on the buffer profiles are mutually overlapped to form a lower step and an upper step in a frame shape, the lower step and the upper step are positioned in the outer box body, and the combined structure of the lower step and the upper step are matched with a package, and the package is used for placing a package; the bottom of preceding buffering parting bead, back buffering parting bead, left buffering parting bead and right buffering parting bead all to the frame form central direction of step extends a plurality of bearing piece, a plurality of the bearing piece ring is established in the bottom of step and is laminated mutually with the interior bottom surface of outer box for the bearing packing thing avoids packing thing and the interior bottom surface direct contact of outer box, plays the cushioning effect.

Further, each corrugated paper used for the front buffer molding strip, the rear buffer molding strip, the left buffer molding strip and the right buffer molding strip is provided with a plurality of first cutting lines penetrating through corrugated boards and being in a shape of a Pi, and the supporting piece is formed by folding along the first cutting lines.

Further, a plurality of second cutting lines which penetrate through corrugated boards and are in an Pi shape are arranged on the side face, close to the lower step, of the upper step, the second cutting lines are turned over to form inserting tongues, slots matched with the inserting tongues are arranged at corresponding positions on the lower step, and the upper step and the lower step are fixedly connected through the insertion cooperation of the inserting tongues and the slots.

Further, the lengths of the upper steps and the lower steps of the left buffer type strip and the right buffer type strip are shorter than those of the upper steps, so that the upper steps and the lower steps form clamping notches which can be clamped with the front buffer type strip and the rear buffer type strip at two ends, the sections of the upper steps and the lower steps of the front buffer type strip and the rear buffer type strip are right trapezoid with wide upper parts and narrow lower parts, and the right angle side of the right trapezoid is close to one side connected with the upper step, and the front buffer profile strip or the rear buffer profile strip is tightly pressed on the lower step end of the left buffer profile strip or the right buffer profile strip through an inclined plane formed by the inclined sides of the right trapezoid so as to be mutually lapped and fixed with the left buffer profile strip or the right buffer profile strip.

Further, a plurality of first folds extending along the length direction are formed in corrugated boards used for the front buffer molding strip, the rear buffer molding strip, the left buffer molding strip and the right buffer molding strip, the corrugated boards are divided into a first area and a second area by taking a certain first fold located at the middle position as a limit, a plurality of first folds are formed in the first area and the second area, an upper step is formed in the first area by folding along the plurality of first folds, and a lower step is formed in the second area by folding along the plurality of first folds.

Further, the section of the upper step is rectangular, seven first folds are arranged on the first region, the first region is divided into eight parallel sections A1, A2, A3, A4, A5, A6, A7 and A8 from outside to inside in sequence, and the widths of the sections are L1, L2, L3, L4, L5, L6, L7 and L8 respectively, wherein L1=L3=L5=L7 and L2=L4=L6; three first folds are arranged on the two regions, the first region is divided into four parallel regions B1, B2, B3 and B4 from inside to outside in sequence, the widths of the regions are M1, M2, M3 and M4 respectively, and L8=L2+M4 and M3> L1.

Further, the cross section of the lower step is a right trapezoid with a wide upper part and a narrow lower part, the right-angle side of the right trapezoid is close to one side connected with the upper step, M3> M1, M2> M4, and l8=l2+m4.

Further, a plurality of first cutting lines which penetrate through corrugated boards and are in a Pi shape are arranged on the B2 region and close to the first crease position connected with the B1 region, and the supporting sheet is formed by folding along the first cutting lines; a plurality of second cutting lines which penetrate through corrugated boards and are in an II shape are arranged on the A5 region and close to the first crease position connected with the A6 region, an inserting tongue is formed after the second cutting lines are turned over, a slot matched with the inserting tongue is arranged on the corresponding position on the B3 region, and the upper step and the lower step are fixedly connected through the inserting cooperation of the inserting tongue and the slot.

Further, a third cutting line which penetrates through corrugated boards and is in an Pi shape is arranged on the A8 region, an inserting sheet is formed after the third cutting line is folded, a jack matched with the inserting sheet is arranged on the B3 region and close to a first crease position connected with the B4 region, and an upper step and a lower step are fixedly connected by being clamped into the jack after being folded through an inserting tongue.

Further, the side edge of the corrugated board used for the front buffer type strip, the rear buffer type strip, the left buffer type strip or the right buffer type strip is cut to form a paperboard strip, one end of the paperboard strip is connected to the corrugated board (incompletely cut), a plurality of second folds with alternately reverse folding directions are formed in the paperboard strip, the paperboard strip is folded along the second folds to form a buffer block (similar to a spring) with elasticity, and the buffer block is arranged in the inner space of the upper step or the lower step to play a role in supporting and buffering.

The corrugated board is folded into the buffer type strips, and then the buffer type strips are combined and lapped to form the buffer structure, the structure is placed in the paper box, so that the full-paper board type buffer packaging paper box is obtained, various types of products can be packaged only by simply adjusting the size and specification of the buffer type strips, the buffer protection effect can be achieved on the products, the whole paper box is made of paper boards, and harmful substances are not migrated or volatilized, and the full-paper board type buffer packaging paper box is recyclable, degradable and environment-friendly; the buffer type strip is assembled by utilizing the elasticity and the characteristic of easy clamping of the paperboard, and is simple to operate and easy to disassemble; the buffer strip is folded into a structure with an upper step and a lower step by arranging a plurality of folds on the corrugated board, so that the buffer strip is simple and easy to manufacture, and only needs to be a piece of board; the cutting lines penetrating through the corrugated board are marked on the corrugated board, the corrugated board is folded into the supporting sheet, the inserting tongue and the inserting sheet, the corresponding positions are hollowed out, the inserting grooves and the inserting holes are mutually inserted and matched, the folded structure is reinforced and fixed, the operation is simple, local materials are obtained, and materials can be saved; the paper board strips can be cut on the same corrugated board, folded into buffer blocks, and filled in the structure to play roles in structural support reinforcement and buffer.

Drawings

Fig. 1 is a schematic diagram of an external structure of an embodiment of the present utility model.

Fig. 2 is a schematic diagram of an internal structure of an embodiment of the present utility model.

Fig. 3 is a schematic structural diagram of a left buffer strip according to an embodiment of the present utility model.

FIG. 4 is an expanded view of a left buffer strip according to an embodiment of the present utility model.

Fig. 5 is a schematic front view of a left buffer strip according to an embodiment of the present utility model.

Fig. 6 is a schematic cross-sectional view in the direction A-A of fig. 5.

Fig. 7 is a schematic cross-sectional view in the direction B-B of fig. 5.

FIG. 8 is a schematic diagram of a rear buffer strip according to an embodiment of the present utility model.

FIG. 9 is an expanded view of a rear bumper strip according to an embodiment of the present utility model.

FIG. 10 is a schematic diagram illustrating a left buffer bar overlapping a rear buffer bar according to an embodiment of the present utility model.

FIG. 11 is an expanded view of a rear bumper strip according to another embodiment of the present utility model.

Fig. 12 is a schematic folding view of a buffer block according to an embodiment of the present utility model.

FIG. 13 is a schematic cross-sectional view of a rear bumper strip in accordance with an embodiment of the present utility model.

FIG. 14 is a schematic cross-sectional view of a further embodiment of a left bumper strip according to an embodiment of the present utility model.

FIG. 15 is an expanded view of a rear bumper strip according to another embodiment of the present utility model.

Reference numerals: 1-an outer box body; 2-front buffer strips; 3-rear buffer strips; 4-left buffer strips; 5-right buffer strips; 6-supporting sheets; 7-up the step; 8-descending a step; 9-a first cutting line; 10-first crease; 11-a second cutting line; 12-inserting a tongue; 13-slots; 14-a third cutting line; 15-inserting sheets; 16-jack; 17-a clip notch; 18-corrugated board; 19-cardboard strips; 20-buffer blocks; 21-second crease.

Detailed Description

The full-cardboard type buffer packaging carton comprises an outer box body 1 and a plurality of buffer type strips arranged in the outer box body 1, wherein the buffer type strips comprise a front buffer type strip 2, a rear buffer type strip 3, a left buffer type strip 4 and a right buffer type strip 5, the front buffer type strip 2, the rear buffer type strip 3, the left buffer type strip 4 and the right buffer type strip 5 are formed by folding and assembling a corrugated cardboard, the lengths of the front buffer type strip 2 and the rear buffer type strip 3 are equal, the lengths of the left buffer type strip 4 and the right buffer type strip 5 are equal, the front buffer type strip 2, the rear buffer type strip 3, the left buffer type strip 4 and the right buffer type strip 5 are respectively folded into steps with two layers of platforms, namely an upper step 7 and a lower step 8, the front buffer type strip 2, the rear buffer type strip 3, the left buffer type strip 4 and the right buffer type strip 5 are mutually clamped (such as through wedge faces), the two layers of platforms on the buffer type strips are mutually lapped to form a frame-shaped lower step 8 and an upper step 7, the upper step 7 and the lower step 8 are arranged in the box body 1, and the box body is matched with the box body for packaging; the bottoms of the front buffer profile 2, the rear buffer profile 3, the left buffer profile 4 and the right buffer profile 5 are respectively extended to the frame-shaped center direction of the lower step 8 to form a plurality of bearing sheets 6, and the plurality of bearing sheets 6 are annularly arranged at the bottom of the lower step 8 and are attached to the inner bottom surface of the outer box body 1, so that a package is supported, the package is prevented from being in direct contact with the inner bottom surface of the outer box body 1, and a buffer effect is achieved. When the display screen is packaged, the periphery of the display screen is supported on a plurality of surrounding supporting sheets 6, and the plane of the display screen is not directly contacted with the inner bottom surface of the outer box body 1. The outer case 1 may be a conventional packing carton structure, such as a corrugated carton, a honeycomb carton, etc., and is selected according to the size and requirements of the packing product.

The front buffer molding strip 2, the rear buffer molding strip 3, the left buffer molding strip 4 and the right buffer molding strip 5 are similar in structure as a whole, and only the shape of the product is adapted to be adaptively adjusted, for example, a certain space is hollowed out at a proper position of a certain buffer molding strip so as to avoid a certain protruding part (for example, a hole on the rear buffer molding strip 3 in fig. 2) of the packaged product. In order to realize the folding and forming of the buffer strips, a structure comprising an upper step 7 and a lower step 8 is formed, as shown in fig. 3 to 9, as one implementation manner, the corrugated boards used for the front buffer strip 2, the rear buffer strip 3, the left buffer strip 4 and the right buffer strip 5 are all provided with a plurality of first folds 10 extending along the length direction, a certain first fold 10 at the middle position is divided into a first area and a second area by taking the first fold 10 as a boundary, a plurality of first folds 10 are still distributed on the first area and the second area, the first area is folded along the first folds 10 on the first area to form the upper step 7, and the second area is folded along the first folds 10 on the second area to form the lower step 8.

In this embodiment, the cross section of the upper step 7 is rectangular, seven first folds 10 are disposed on the first region, the first region is divided into eight parallel sections A1, A2, A3, A4, A5, A6, A7, A8 from outside to inside, the widths of the sections are L1, L2, L3, L4, L5, L6, L7, L8, respectively, wherein l1=l3=l5=l7, l2=l4=l6; three first folds 10 are arranged on the two regions, a region is divided into four parallel regions B1, B2, B3 and B4 from inside to outside in sequence, the widths of the regions are M1, M2, M3 and M4 respectively, and L8=L2+M4 and M3> L1. The cross section of the lower step 8 is a right trapezoid with a wide upper part and a narrow lower part, the right-angle side of the right trapezoid is close to one side connected with the upper step 7, and M3 is more than M1, M2 is more than M4, and l8=l2+m4.

For convenience in processing, as one embodiment, as shown in fig. 4 and fig. 9, each corrugated paper used in the front buffer profile 2, the rear buffer profile 3, the left buffer profile 4 and the right buffer profile 5 is provided with a plurality of first cutting lines 9 (cutting lines in the present utility model refer to lines penetrating through the corrugated board by blades, and folds are marks which are formed by pre-pressing and are convenient to fold) penetrating through the corrugated board, and the supporting sheet 6 is formed by folding along the first cutting lines 9. Therefore, the corrugated board can be cut, the processing, the manufacturing and the forming are convenient, and the materials are saved. In this embodiment, the first cutting line 9 is disposed on the B2 region near the first crease 10 connected to the B1 region.

As one embodiment, a plurality of second cutting lines 11 penetrating through corrugated boards and being in a pi shape are arranged on the side surface of the upper step 7, which is close to the lower step 8, the second cutting lines 11 are folded to form inserting tongues 12, inserting grooves 13 matched with the inserting tongues 12 are arranged at corresponding positions on the lower step 8, the upper step 7 and the lower step 8 are fixedly connected through the inserting connection between the inserting tongues 12 and the inserting grooves 13, the manufacturing and the forming are convenient, and the buffer strip structure is stable. In this embodiment, the second cutting line 11 is disposed on the A5 region near the first crease 10 connected to the A6 region, and the slot 13 is disposed on the B3 region at a corresponding position.

In this embodiment, be provided with the third cutting line 14 that is the form of II that pierces through corrugated container board on the A8 district, just third cutting line 14 turns over and can form inserted sheet 15 after rolling over, be provided with on the B3 district near the first crease 10 position department that links to each other with the B4 district with inserted sheet 15 looks adaptation jack 16, go up step 7 and step 8 and go down through insert tongue 12 and turn over the back card and go into in the jack and fixed connection, further strengthened the buffering type strip, avoid the frame that looses.

The number of the first cutting lines 9, the second cutting lines 11 and the third cutting lines 14, the number of the bearing sheets 6, the inserting tongue 12, the inserting sheets 15, the inserting slots 13 and the inserting holes 16 is determined according to practical situations, as in the embodiment, the front buffer type strip 2 and the rear buffer type strip 3 are two long sides, the left buffer type strip 4 and the right buffer type strip 5 are two short sides, the first cutting lines 9 on the front buffer type strip 2 and the rear buffer type strip 3 are 4, 4 bearing sheets 6 are respectively formed, 2 first cutting lines 9 on the left buffer type strip 4 and the right buffer type strip 5 are respectively formed, and 2 bearing sheets 6 are respectively formed; the front buffer molding strip 2, the rear buffer molding strip 3, the left buffer molding strip 4 and the right buffer molding strip 5 are provided with 2 second cutting lines 11, which are respectively turned into 2 inserting tongues 12 correspondingly, and are provided with corresponding 2 inserting grooves 13; the third cutting lines 14 on the front buffer molding strip 2 and the rear buffer molding strip 3 are 2, the corresponding cutting lines are respectively turned into 2 inserting pieces 15, and are provided with corresponding 2 inserting holes 16, the third cutting lines 14 on the left buffer molding strip 4 and the right buffer molding strip 5 are 1, the corresponding cutting lines are respectively turned into 1 inserting piece 15, and are provided with corresponding 1 inserting hole 16.

In this embodiment, as shown in fig. 2, the lengths of the upper steps 8 and the lower steps 8 of the left buffer profile 4 and the right buffer profile 5 are shorter than those of the upper steps 7, so that the upper steps 7 and the lower steps 8 form clamping notches 17 (as shown in fig. 3) capable of being clamped with the front buffer profile 2 and the rear buffer profile 3 at two ends, the cross sections of the upper steps 8 and the lower steps 8 of the front buffer profile 2 and the rear buffer profile 3 are right trapezoid with wide upper sides and narrow lower sides, the right angle sides of the right trapezoid are close to one side connected with the upper steps 7, as shown in fig. 10, the front buffer profile 2 or the rear buffer profile 3 is tightly pressed on the end of the lower steps 8 of the left buffer profile 4 or the right buffer profile 5 through the inclined planes formed by the inclined sides of the right trapezoid, and is mutually lapped and fixed with the left buffer profile 4 or the right buffer profile 5. In order to make the lengths of the upper and lower steps 8 of the left and right buffer strips 4 and 5 shorter than the upper step 7, the corresponding portions are cut out of the corresponding corrugated board, as shown in the figure, at the intermediate positions of both sides of the two regions.

As one embodiment, as shown in fig. 11 to 13, the ends of the corrugated board 18 used for the front buffer molding 2, the rear buffer molding 3, the left buffer molding 4 or the right buffer molding 5 are cut to form a board strip 19, one end of the board strip 19 is connected to the corrugated board 18 (incomplete cutting), a plurality of second folds 21 with alternately opposite folding directions are provided on the board strip 19, the board strip 19 is folded along the second folds 21 to form a buffer block 20 with elasticity, and the buffer block 20 is placed in the inner space of the upper step 7 or the lower step 8 to play a supporting and buffering role. The paper board strip 19 can be obtained by cutting any side of the corrugated board 18 according to actual requirements, or as shown in fig. 14, the paper board strip 19 is cut on both sides, then the front and back sides are alternately folded to form an elastic buffer block 20, the elastic buffer block is plugged in a step (an upper step 7 or/and a lower step 8) which is close to the step and needs to be supported and buffered, collapse caused by difficult bearing when the hollow rectangular step folded by the paper board is too long or too wide is avoided, a certain buffer effect is also achieved, and the paper board strip 19 is generally cut nearby; the paper lath 19 can be cut at other proper positions, and the paper lath is thoroughly cut off during cutting, is separated from the cut corrugated paper board, is folded into a buffer block 20 and is plugged in a step to be supported; of course, various cardboard strips 19 can be prepared, folded to form various cushioning blocks 20, and where the appropriate cushioning blocks 20 need to be inserted.

The foregoing detailed description is directed to embodiments of the utility model which are not intended to limit the scope of the utility model, but rather to cover all modifications and variations within the scope of the utility model.

Claims (10)

1. The full-cardboard type buffer packaging carton is characterized by comprising an outer box body and a plurality of buffer profiles arranged in the outer box body, wherein the buffer profiles comprise a front buffer profile, a rear buffer profile, a left buffer profile and a right buffer profile, the front buffer profile, the rear buffer profile, the left buffer profile and the right buffer profile are respectively formed by folding a corrugated cardboard, the lengths of the front buffer profile and the rear buffer profile are equal, the lengths of the left buffer profile and the right buffer profile are equal, the front buffer profile, the rear buffer profile, the left buffer profile and the right buffer profile are respectively folded into steps with two layers of platforms, the front buffer profile, the rear buffer profile, the left buffer profile and the right buffer profile are clamped end to end, the two layers of platforms on each buffer profile are mutually overlapped to form a lower step and an upper step of a frame shape, and the lower step and the upper step are positioned in the outer box body, and the combined structure of the lower step and the upper step are matched with a packaging object for placing a packaging object; the bottoms of the front buffer molding strip, the rear buffer molding strip, the left buffer molding strip and the right buffer molding strip extend to the frame-shaped center direction of the lower step to form a plurality of bearing sheets, and the bearing sheets are annularly arranged at the bottom of the lower step and are attached to the inner bottom surface of the outer box body for bearing the packaged materials.

2. The full-cardboard type buffer packaging carton according to claim 1, wherein a plurality of first cutting lines penetrating through corrugated boards are arranged on each corrugated paper used for the front buffer profile, the rear buffer profile, the left buffer profile and the right buffer profile, and the supporting sheets are formed by folding along the first cutting lines.

3. The full-cardboard type buffer packaging carton according to claim 1, wherein a plurality of second cutting lines penetrating through corrugated boards and shaped like a Pi are arranged on the side face, close to the lower step, of the upper step, inserting grooves matched with the inserting tongues are formed in corresponding positions of the lower step, and the upper step and the lower step are fixedly connected through inserting connection of the inserting tongues and the inserting grooves.

4. The full-cardboard type buffer packaging carton according to claim 1, wherein the lengths of the upper steps and the lower steps of the left buffer profile and the right buffer profile are shorter than those of the upper steps, so that the upper steps and the lower steps form clamping notches at two ends, the cross sections of the upper steps and the lower steps of the front buffer profile and the rear buffer profile are right trapezoid with wide upper parts and narrow lower parts, the right angle side of the right trapezoid is close to one side connected with the upper steps, and the front buffer profile or the rear buffer profile is tightly pressed on the end of the lower steps of the left buffer profile or the right buffer profile through an inclined plane formed by the inclined sides of the right trapezoid and is mutually overlapped and fixed with the left buffer profile or the right buffer profile.

5. The full-cardboard type cushioning packaging carton according to claim 1, wherein the corrugated cardboard used for the front cushioning molding strip, the rear cushioning molding strip, the left cushioning molding strip and the right cushioning molding strip are each provided with a plurality of first folds extending in the length direction, and are divided into a first area and a second area by taking a certain first fold located at the middle position as a boundary, wherein the first area is folded along a plurality of first folds thereon to form an upper step, and the second area is folded along a plurality of first folds thereon to form a lower step.

6. The full-cardboard type buffer packaging carton according to claim 5, wherein the cross section of the upper step is rectangular, seven first folds are arranged on the one region, the one region is divided into eight parallel regions A1, A2, A3, A4, A5, A6, A7 and A8 from outside to inside in sequence, and the widths of the regions are L1, L2, L3, L4, L5, L6, L7 and L8 respectively, wherein l1=l3=l5=l7 and l2=l4=l6; three first folds are arranged on the two regions, the first region is divided into four parallel regions B1, B2, B3 and B4 from inside to outside in sequence, the widths of the regions are M1, M2, M3 and M4 respectively, and L8=L2+M4 and M3> L1.

7. The full cardboard type buffer packaging carton according to claim 6, wherein the cross section of the lower step is a right trapezoid with a wider upper part and a narrower lower part, and the right angle side of the right trapezoid is close to the side connected with the upper step, wherein M3> M1, M2> M4, and l8=l2+m4.

8. The full-cardboard type buffer packaging carton according to claim 6, wherein a plurality of first cutting lines penetrating corrugated boards are arranged on the region B2 near a first crease position connected with the region B1, and the supporting sheets are formed by folding along the first cutting lines; a plurality of second cutting lines which penetrate through corrugated boards and are in an II shape are arranged on the A5 region and close to the first crease position connected with the A6 region, an inserting tongue is formed after the second cutting lines are turned over, a slot matched with the inserting tongue is arranged on the corresponding position on the B3 region, and the upper step and the lower step are fixedly connected through the inserting cooperation of the inserting tongue and the slot.

9. The full-cardboard type buffer packaging carton according to claim 6, wherein a third cutting line penetrating through corrugated board and shaped like a Chinese character 'pi' is arranged on the area A8, an inserting sheet is formed after the third cutting line is folded, a jack matched with the inserting sheet is arranged on the area B3 near a first folding mark position connected with the area B4, and an upper step and a lower step are fixedly connected by being clamped into the jack after being folded through an inserting tongue.

10. The full-cardboard type buffer packaging carton according to claim 1, wherein cardboard strips are cut on the side edges of corrugated cardboard used for the front buffer profile, the rear buffer profile, the left buffer profile or the right buffer profile, one end of each cardboard strip is connected to the corrugated cardboard, a plurality of second folds with alternately opposite folding directions are arranged on each cardboard strip, the cardboard strips are folded along the second folds to form elastic buffer blocks, and the buffer blocks are arranged in the inner space of the upper step or the lower step to play a supporting and buffering role.