Paper lining of packaging box and packaging box comprising same

Abstract

The utility model provides a paper lining of a packaging box and the packaging box comprising the paper lining. The paper lining comprises an upper liner, a lower liner and a middle liner, protruding limiting paper blocks are arranged between the upper liner and the lower liner, at least part of the limiting paper blocks are arranged in the edge area, and a limiting groove formed by the multiple limiting paper blocks is used for clamping the appearance structure of a packaged object. The inserting grooves in the upper liner and the lower liner are matched with the inserting tongues on the middle liner, so that the middle liner is connected with the upper liner and the lower liner; the middle liner is clamped on a packaged object; a plurality of supporting paper blocks are arranged on the outer side faces of the upper liner and the lower liner, and at least part of the supporting paper blocks are arranged at the four corner areas of the upper liner and / or the lower liner. According to the paper lining of the packaging box and the packaging box comprising the paper lining, full-paper material packaging is achieved, the requirements of environmental protection laws and regulations are met, the overall stability and the structural strength of the packaging box in the four corner areas are improved from different aspects, the packaging box can easily pass a falling test, and the protection effect and the protection reliability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of packing, in particular to a paper inner lining of packing box and packing box comprising same. BACKGROUND

[0002] At present, in the field of kitchen appliances, the packaging method of kitchen appliances such as range hood, EPS (Expandable Polystyrene) is generally used as packaging buffer material. EPS foam has the characteristics of low price, easy processing and molding, and the internal porous structure can effectively absorb impact energy and reduce product deformation during transportation. However, EPS foam has large volume, poor recyclability, and is difficult to degrade and easy to pollute the environment. At present, many countries have restricted or prohibited the use of EPS or EPE (Expanded Polyethylene) foam. In order to meet the requirements of environmental protection regulations, more and more attention is paid to environmental protection packaging. At present, the environmental protection packaging scheme used in the market mostly uses paper pulp molding, corrugated paperboard and other materials. However, the existing paper packaging often has the problems of inadequate protection, poor protection effect and inability to pass the drop test. SUMMARY

[0003] The technical problem to be solved by the utility model is to overcome the above-mentioned defects in the prior art, and to provide a paper inner lining of packing box and a packing box comprising same.

[0004] The utility model solves the above-mentioned technical problems by the following technical scheme:

[0005] A paper inner lining of packing box, the paper inner lining comprises upper gaskets, lower gaskets wrapped on both sides of the packaged object and a middle gasket between the upper gaskets and the lower gaskets; a plurality of protruding limiting paper blocks are provided on the opposite surfaces between the upper gaskets and the lower gaskets, at least part of the limiting paper blocks are provided in the edge area of the upper gaskets and the lower gaskets, and the limiting recesses formed by a plurality of the limiting paper blocks are used to clamp the outer shape structure of the packaged object; a plurality of insertion slots are provided on the upper gaskets and the lower gaskets, a plurality of insertion tongues are provided on the middle gasket, the insertion tongues are inserted into the insertion slots, the middle gasket is connected with the upper gaskets and the lower gaskets; the middle gasket is clamped on the surface of the middle part of the packaged object; a plurality of supporting paper blocks are provided on the outer side surfaces of the upper gaskets and the lower gaskets, at least part of the supporting paper blocks are provided in the four corner areas of the upper gaskets and / or the lower gaskets.

[0006] In the scheme, the paper inner liner adopts full paper material, which meets the requirements of environmental protection regulations. The overall stability and the structural strength of the paper inner liner in the corner area are improved from different aspects through the above structure, so that it is easy to pass the drop test, and the protection effect and reliability are improved. The stability of each component of the paper inner liner is improved through the cooperation and connection of the plug and the slot. The shape structure of the packaged object is limited in the limiting groove formed by the upper gasket and the lower gasket and the surface of the middle part of the packaged object is clamped by the middle gasket, so that the position of the packaged object is limited from different directions, so that it cannot move, and the stability of the packaging is ensured. The thickness of the protruding limiting paper block is increased, and the limiting paper block is arranged at the edge area of the upper gasket and the lower gasket, so that the structural strength of the corner area of the paper inner liner on the inner surface is improved; the structural strength of the corner area of the paper inner liner on the outer surface is improved by arranging the supporting paper block in the corner area of the outer side of the upper gasket and the lower gasket, so that the overall structural strength and protection effect are improved.

[0007] Preferably, the thickness of the limiting paper block is greater than 30mm.

[0008] In the scheme, the thickness of the limiting paper block is greater than 30mm, which ensures the supporting strength and impact resistance of the limiting paper block.

[0009] Preferably, the middle gasket comprises paperboards connected to each other and separated into several compartments,

[0010] The paperboard is provided with a slot corresponding to the contour of the middle part of the packaged object, forming a limiting structure clamped on the surface of the middle part.

[0011] In the scheme, the middle gasket is separated into several compartments, which can accommodate accessories or adapt to the size and shape of the packaged object, improve space utilization, and make the packaging more compact. The above limiting structure is clamped on the middle part of the packaged object, so that the middle part of the packaged object is well supported and the stress of the packaged object at different positions is balanced, thereby facilitating the stability of the packaging.

[0012] Preferably, the paperboard of the middle gasket comprises a first middle paperboard, a second middle paperboard, a third middle paperboard and a fourth middle paperboard, the first middle paperboard and the second middle paperboard are arranged in parallel and spaced apart, the third middle paperboard and the fourth middle paperboard are arranged in parallel and spaced apart, and the two sides of the third middle paperboard and the two sides of the fourth middle paperboard are connected to the first middle paperboard and the second middle paperboard; the first middle paperboard and the second middle paperboard are provided with a slot corresponding to the contour of the middle part, forming the limiting structure.

[0013] In the scheme, the middle gasket with the above structure is adopted, and each paperboard supports each other, so that the structure is stable.

[0014] Preferably, the paperboard of the first and second middle paperboards comprises a plurality of core papers superimposed and bonded, and the extension direction of the core papers of the first and second middle paperboards is arranged to be consistent with the stress direction of the packaged object.

[0015] In this scheme, the extension direction of the core papers of the first and second middle paperboards is consistent with the stress direction of the packaged object, which is conducive to improving the support strength of the first and second middle paperboards.

[0016] Preferably, at least one partition paperboard is further arranged between the first and second middle paperboards, and the partition paperboard divides the space between the first and second middle paperboards into two partition chambers.

[0017] In this scheme, the two partition chambers divided by the partition paperboard can accommodate accessories or adapt to the size and shape of the packaged object, improve the space utilization rate, and make the package more compact.

[0018] Preferably, the paper inner liner further comprises an auxiliary pad folded by a plurality of paperboards, and trapezoidal slots and trapezoidal cards connecting edges of the trapezoidal slots are arranged on the paperboard of the auxiliary pad, and the trapezoidal cards are used to pass through the trapezoidal slots after the paperboard of the auxiliary pad is folded, so as to lock the folded plurality of paperboards in a folded state.

[0019] In this scheme, the folded plurality of paperboards can be locked in the folded state by the cooperation of the trapezoidal slots and the trapezoidal cards, and will not be loose, ensuring the support strength of the auxiliary pad.

[0020] Preferably, the packaged object is a range hood, the range hood comprises a smoke collecting cover, a fan cover, and a decorative cover arranged outside the fan cover, part of the limiting grooves are used to clamp the lower surfaces of the smoke collecting cover and the fan cover, and the middle pad is clamped on the upper surface of the fan cover; the lower pad further comprises an avoiding position for avoiding the ear structure of the decorative cover and an avoiding hole for the ear structure to pass through.

[0021] In this scheme, by arranging the avoiding position and the avoiding hole, the fan cover and the decorative cover are prevented from being deformed by stress at the ear structure, which is conducive to the stability of the overall structure.

[0022] Preferably, the material of the paper inner liner is corrugated paper.

[0023] In this scheme, corrugated paper is used, and the strength of the paper material itself is high.

[0024] A packaging box, comprising an outer packaging box body and a paper inner liner as described above, and the paper inner liner is arranged in the outer packaging box body.

[0025] In the scheme, the packaging box can realize full paper material packaging by adopting the paper inner liner, adapt to environmental protection regulation requirements, improve the overall stability and the structural strength of the packaging box in the four corner areas from different aspects, make it easy to pass the drop test, improve the protection effect and protection reliability.

[0026] The positive progress effect of the utility model lies in: the paper inner liner of the packaging box and the packaging box comprising same realize full paper material packaging, adapt to environmental protection regulation requirements, improve the overall stability and the structural strength of the packaging box in the four corner areas from different aspects, make it easy to pass the drop test, improve the protection effect and protection reliability. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structure schematic view of the upper surface of the lower gasket of the utility model embodiment 1, and the upper surface of the lower gasket is opposite to the lower surface of the upper gasket.

[0028] Figure 2 It is a structure schematic view of the upper surface of the upper gasket of the utility model embodiment 1.

[0029] Figure 3 It is a structure schematic view of the lower surface of the lower gasket of the utility model embodiment 1.

[0030] Figure 4 It is a shape structure schematic view of paperboard unfolding before folding and connecting of the upper gasket of the utility model embodiment 1.

[0031] Figure 5 It is a structure schematic view of the lower surface of the upper gasket of the utility model embodiment 1.

[0032] Figure 6 It is a structure schematic view of the upper surface of the upper gasket of the utility model embodiment 1.

[0033] Figure 7 It is a shape structure schematic view of paperboard unfolding before folding and connecting of the upper gasket of the utility model embodiment 1.

[0034] Figure 8 It is a structure schematic view of the middle gasket of the utility model embodiment 1.

[0035] Figure 9 It is a shape structure schematic view of paperboard unfolding before folding and connecting of the middle gasket of the utility model embodiment 1.

[0036] Figure 10 It is a structure schematic view of the auxiliary gasket of the utility model embodiment 1.

[0037] Figure 11The shape structure schematic diagram of paperboard unfolding before folding and connecting of the auxiliary gasket of the utility model embodiment 1.

[0038] Figure 12 The placement position schematic diagram (the paper lining is hidden in the figure) of the components of the range hood being packaged in the utility model embodiment 1 is fixed by the paper lining.

[0039] Mark explanation:

[0040] Upper gasket 2

[0041] First upper paperboard 21

[0042] Second upper paperboard 22

[0043] Third upper paperboard 23

[0044] U-shaped recess 24

[0045] Limiting paper block 6

[0046] Limiting recess 7

[0047] Lower gasket 3

[0048] First lower paperboard 31

[0049] Second lower paperboard 32

[0050] Third lower paperboard 33

[0051] Fourth lower paperboard 34

[0052] Avoiding position 35

[0053] Avoiding hole 36

[0054] Insert slot 8

[0055] Insert tongue 9

[0056] Supporting paper block 10

[0057] Middle gasket 4

[0058] First middle paperboard 41

[0059] Second middle paperboard 42

[0060] Third middle paperboard 43

[0061] Fourth middle paperboard 44

[0062] Slot 45

[0063] Limiting structure 46

[0064] Extension direction A of core paper

[0065] Partition paperboard 47

[0066] auxiliary pad 5

[0067] trapezoidal groove 51

[0068] range hood 100

[0069] fume hood 101

[0070] fan cover 102

[0071] decorative cover 103

[0072] butterfly plate 104 DETAILED DESCRIPTION

[0073] The utility model will be described more clearly and completely below with a preferred embodiment and in conjunction with the drawings.

[0074] Example 1

[0075] The paper inner liner of the packaging box provided in the embodiment is used for clamping and wrapping a packaged object, so that the packaged object is fixed and cannot be damaged due to impact, vibration, falling or other external forces in the process of transportation, carrying or other movement, thereby playing a good protection role. The technical scheme of the paper inner liner is described by taking the range hood 100 as the packaged object, however, the paper inner liner of the embodiment can also be used for packaging other packaged objects, thereby playing a better anti-falling and anti-treading effect.

[0076] The paper inner liner comprises the upper pad 2 and the lower pad 3 wrapped on both sides of the range hood 100 and the middle pad 4 between the upper pad 2 and the lower pad 3; a plurality of protruding limiting paper blocks 6 are arranged on the opposite surfaces between the upper pad 2 and the lower pad 3, at least part of the limiting paper blocks 6 are arranged in the edge regions of the upper pad 2 and the lower pad 3, and a limiting groove 7 formed by the plurality of limiting paper blocks 6 is used for clamping the outer shape structure of the range hood 100; a plurality of insertion slots 8 are arranged on the upper pad 2 and the lower pad 3, a plurality of insertion tongues 9 are arranged on the middle pad 4, the insertion tongues 9 are inserted into the insertion slots 8, the middle pad 4 is connected with the upper pad 2 and the lower pad 3, the middle pad 4 is clamped on the surface of the middle part of the range hood 100, and the outer side surfaces of the upper pad 2 and the lower pad 3 are each provided with a plurality of supporting paper blocks 10, at least part of the supporting paper blocks 10 are arranged in the four corner regions of the upper pad 2 and / or the lower pad 3.

[0077] Specifically, all the components of the paper inner liner are made of BC corrugated paper board, which is a common double-sided corrugated paper board and a kind of technology of existing paper structure.

[0078] For example, the upper pad 2, the lower pad 3 and the middle pad 4 are all made of BC corrugated paper board. Figures 2-4As shown, the lower gasket 3 mainly plays a role of buffering and limiting, and the lower gasket 3 comprises a first lower paperboard 31, a second lower paperboard 32, a third lower paperboard 33 and a fourth lower paperboard 34. The first lower paperboard 31 mainly serves as a base material, and the dashed portion in the figure is a sewing line. The paperboard in the middle region of the first lower paperboard 31 is folded into a limiting paper block 6 in the vertical direction by the surface paperboard along the sewing line, and two limiting paper blocks 6 in the vertical direction form a limiting groove 7 in the vertical direction, which is used for clamping the lower surface of the fan cover 102 of the range hood 100 located in the middle portion. The second lower paperboard 32 is folded into multiple layers of paper blocks along the sewing line, and then is pasted on the first lower paperboard 31 to form a limiting paper block 6 around the edge region of the lower gasket 3. The limiting paper block 6 forms a limiting groove 7 in the horizontal direction, which is used for clamping the lower edge portion of the smoke collecting cover 101 as the outer shape structure of the range hood 100, and limits the movement of the fan system of the range hood 100 in the left-right direction. At the same time, such a limiting groove 7 structure can also protect the range hood 100, so that it has the ability to resist the impact of angular falling. Four rectangular insertion slots 8 are also provided on the first lower paperboard 31, which are used for the insertion of the insertion tongues 9 of the middle gasket 4, so as to connect the lower gasket 3 and the middle gasket 4. As shown in the figure, Figure 3 As shown, the third lower paperboard 33 and the fourth lower paperboard 34 are provided on the outer side of the lower gasket 3 (i.e. the back of the first lower paperboard 31), and the third lower paperboard 33 and the fourth lower paperboard 34 serve as supporting paper blocks 10 of the lower gasket 3, and are composed of five layers of BC corrugated paperboards respectively and are pasted on the first lower paperboard 31, so as to play a role of supporting and buffering, and avoid deformation of the back plate of the range hood 100 and the tail portion of the fan cover 102. The third lower paperboard 33 is a long strip-shaped paperboard, and two third lower paperboards 33 are arranged in parallel and at intervals on the two side edges of the back of the first lower paperboard 31, so as to balance the stress. The third lower paperboard 33 is arranged on the outer side of the third lower paperboard 33 close to the front side, and the fourth lower paperboard 34 is pasted on the outer side edge of the third lower paperboard 33 close to the front side. The fourth lower paperboard 34 is a square paper block, which can avoid shielding the avoiding hole 36 at the edge. In other embodiments, if the packaged object is not the range hood 100 of the present embodiment and does not need the avoiding hole 36, the long strip-shaped third lower paperboard 33 can be directly pasted on the outer side edge of the first lower paperboard 31 without the fourth lower paperboard 34 in the form of a small square block, or the fourth lower paperboard 34 can also adopt other shapes to better balance the stress and improve the supporting strength. Figure 3 The third lower paperboard 33 is a long strip-shaped paperboard, and two third lower paperboards 33 are arranged in parallel and at intervals on the two side edges of the back of the first lower paperboard 31, so as to balance the stress. The third lower paperboard 33 is arranged on the outer side of the third lower paperboard 33 close to the front side, and the fourth lower paperboard 34 is pasted on the outer side edge of the third lower paperboard 33 close to the front side. The fourth lower paperboard 34 is a square paper block, which can avoid shielding the avoiding hole 36 at the edge. In other embodiments, if the packaged object is not the range hood 100 of the present embodiment and does not need the avoiding hole 36, the long strip-shaped third lower paperboard 33 can be directly pasted on the outer side edge of the first lower paperboard 31 without the fourth lower paperboard 34 in the form of a small square block, or the fourth lower paperboard 34 can also adopt other shapes to better balance the stress and improve the supporting strength.

[0079] As shown in the figure, Figures 5-7As shown, the upper liner 2 mainly plays the role of anti-treading and placing accessories, and includes a first upper paperboard 21, a second upper paperboard 22 and a third upper paperboard 23. The first upper paperboard 21 mainly serves as a base material, and the dotted line on the first upper paperboard 21 is a half knife line that is folded to improve the overall strength. A surrounding limiting paper block 6 is also pasted on the surface of the first upper paperboard 21 opposite to the first lower paperboard 31 and located at the edge region of the first upper paperboard 21, forming a transverse limiting groove 7 for clamping the upper edge portion of the smoke hood 101, together with the limiting groove 7 on the first lower paperboard 31, to stably clamp the smoke hood 101 and prevent it from moving and loosening. The meandering groove 24 in the middle of the first upper paperboard 21 is used to place the hook of the fan cover 102 of the range hood 100. Four rectangular insertion slots 8 are also provided on the first upper paperboard 21 for the insertion of the insertion tongues 9 of the middle liner 4, thereby connecting the upper liner 2 and the middle liner 4. The second upper paperboard 22 and the third upper paperboard 23 are located at the outer side of the upper liner 2 (i.e. the upper surface of the first upper paperboard 21) near the outer side edge regions of the four corners, serving as support paper blocks 10 of the upper liner 2 and mainly playing the role of support, and are composed of four layers of BC corrugated paperboards and pasted on the first upper paperboard 21. The middle slotted portions 45 respectively place the whole machine hook and the oil cup hook.

[0080] As shown in Figure 8 and Figure 9 , the middle liner 4 mainly plays the role of support and limiting, and includes a first middle paperboard 41, a second middle paperboard 42, a third middle paperboard 43 and a fourth middle paperboard 44. The first middle paperboard 41 and the second middle paperboard 42 are arranged in parallel and at intervals, and two insertion slots 8 are provided thereon. The insertion slots 8 on the first middle paperboard 41 and the second middle paperboard 42 are inserted with the insertion slots 8 on the third middle paperboard 43 and the fourth middle paperboard 44, forming a plurality of compartments. In this embodiment, the third middle paperboard 43 and the fourth middle paperboard 44 are two paperboards of the same shape and arranged in parallel and at intervals, mainly playing the role of support. The upper and lower ends of the third middle paperboard 43 and the fourth middle paperboard 44 are respectively cut into a plurality of insertion tongues 9, which cooperate with the rectangular insertion slots 8 of the upper liner 2 and the lower liner 3 to connect the middle liner 4, the upper liner 2 and the lower liner 3 into a stable inner liner structure as a whole. The dotted line on the second middle paperboard 42 is a sewing line, and the paperboard can be folded at this position to avoid the butterfly wing plate 104 from directly contacting the machine and causing bumping. The two sides of the first middle paperboard 41 and the second middle paperboard 42 can place the decorative cover 103 and the smoke hood 101 of the range hood 100, thereby improving the space utilization rate of the whole machine packaging. The middle region of the first middle paperboard 41 and the second middle paperboard 42 is provided with a slotted portion 45, forming a limiting structure 46, so that the middle liner 4 can be clamped on the surface of the middle portion (i.e. the fan cover 102) of the range hood 100 to stably fix the fan cover 102. When the whole machine is subjected to impact on the whole side surface, the position of the fan system of the range hood 100 can be limited.

[0081] The paper inner liner adopts full paper material, meets the requirements of environmental protection regulations, and improves the overall stability and the structural strength of the paper inner liner in the four corner areas from different aspects through the above structure, so that it can easily pass the drop test, and the protection effect and protection reliability are improved. Among them, the stability of each component of the paper inner liner is improved through the cooperation and connection of the plug 9 and the slot 8. The shape structure of the range hood 100 is limited therein through the limiting groove 7 formed by the plurality of limiting paper blocks 6 on the upper gasket 2 and the lower gasket 3, and the position of the range hood 100 is limited from different directions through the middle gasket 4 clamped on the surface of the middle part of the range hood 100, so that it cannot move, and the stability of the package is ensured. The thickness of the paper block is increased by using the protruding limiting paper block 6, and the limiting paper block 6 is arranged at the edge area of the upper gasket 2 and the lower gasket 3, so that the structural strength of the four corner areas of the paper inner liner on the inner surface is improved; the structural strength of the four corner areas of the paper inner liner on the outer surface is improved by arranging the supporting paper block 10 at the four corner areas of the outer side of the upper gasket 2 and the lower gasket 3, so that the overall structural strength and protection effect are improved. For example, the gross weight of the range hood 100 is 35 kg, and the paper inner liner of the embodiment can pass the drop test (one corner three edges six surface test, one corner three edges drop height 450 mm, six surface drop height 500 mm) and the stepping test, the humid state stacking test, etc.

[0082] In other embodiments, the number of paperboards included in each gasket, the number, shape and thickness of the limiting paper blocks 6 and the supporting paper blocks 10 can be adjusted according to the shape structure of the packaged object. The structure of the middle gasket 4 and the clamping form thereof can also be changed according to the shape of the packaged object.

[0083] In the embodiment, the thickness of each limiting paper block 6 is greater than 30 mm, and the thickness range ensures the supporting strength and impact resistance of the limiting paper block 6.

[0084] As described above, the middle gasket 4 includes paperboards connected to each other and separated into a plurality of compartments, and the paperboards are provided with a slot 45 consistent with the contour of the fan cover 102 to form a limiting structure 46 clamped on the surface of the middle part. The middle gasket 4 is separated into a plurality of compartments to accommodate accessories or adapt to the size and shape of the packaged object, improve the space utilization, and make the package more compact. The limiting structure 46 clamped on the middle part of the packaged object provides strong support for the middle part of the packaged object, balances the stress of the packaged object at different positions, and thus is conducive to the stability of the package. In other embodiments, there are various structure forms for forming a plurality of compartments, and therefore the middle gasket 4 is not limited to the structure formed by the above four paperboards.

[0085] However, compared with other structural forms, the middle liner 4 of the present embodiment adopts the structural form of the above four paperboards, which support each other and are stable in structure.

[0086] The corrugated paperboard of the first middle paperboard 41 and the second middle paperboard 42 comprises a plurality of core papers which are superimposed and bonded, and the extension direction of the core papers of the first middle paperboard 41 and the second middle paperboard 42 is arranged to be consistent with the stress direction of the range hood 100, which is conducive to improving the support strength of the first middle paperboard 41 and the second middle paperboard 42.

[0087] As shown in Figure 8 and Figure 9 , at least one partition paperboard 47 is further arranged between the first middle paperboard 41 and the second middle paperboard 42, which divides the space between the first middle paperboard 41 and the second middle paperboard 42 into two partition chambers, can accommodate accessories or adapt to the size and shape of the packaged object, improve the space utilization rate, and also make the package more compact. For example, in the present embodiment, the hollow area formed by the upper partition chamber can be used to place the butterfly plate 104 of the range hood 100.

[0088] The paper inner liner further comprises an auxiliary liner 5 which is folded by a plurality of paperboards. In the present embodiment, the auxiliary liner 5 is used to accommodate accessories of the range hood 100, such as power cords, etc. The auxiliary liner 5 is placed at the back side of the paper inner liner, and is therefore also called a back liner. The back liner is folded by a plurality of paperboards, and trapezoidal grooves 51 and trapezoidal cards (not shown in the figure) connecting the edges of the trapezoidal grooves 51 are formed on the paperboards. The trapezoidal cards pass through the trapezoidal grooves 51 to lock the folded plurality of paperboards in the folded state, so as not to be loose, and ensure the support strength of the auxiliary liner 5. The back liner can also prevent displacement of the range hood 100 when falling backward or backward. In other embodiments, the auxiliary liner 5 can also be only an auxiliary support structure for increasing support strength, and therefore is called an auxiliary liner 5.

[0089] As shown in Figure 2 , Figure 3 and Figure 12 , the range hood 100 of the present embodiment comprises a hood 101, a fan cover 102 and a decorative cover 103 arranged outside the fan cover 102. Part of the limiting grooves 7 are used to clamp the lower surface of the hood 101 and the fan cover 102, and the middle liner 4 is clamped on the upper surface of the fan cover 102. The lower liner 3 is further provided with an avoiding position 35 which avoids the hanging ear structure of the decorative cover 103 and an avoiding hole 36 through which the hanging ear structure passes. Through the above-mentioned avoiding position 35 and avoiding hole 36, the stress deformation of the fan cover 102 and the decorative cover 103 at the hanging ear structure is avoided, which is conducive to the stability of the overall structure.

[0090] The material of the paper inner liner of the embodiment is corrugated paper, and the paper material has high strength itself. However, when the design principle of the paper inner liner of the embodiment is adopted, the material is not limited to corrugated paper, and can also be other paper materials with good strength, such as honeycomb paper.

[0091] Embodiment 2

[0092] The embodiment provides a packaging box, which comprises an outer packaging box body and a paper inner liner as in Embodiment 1, and the paper inner liner is arranged in the outer packaging box body. By adopting the paper inner liner, the packaging box can realize full-paper material packaging, adapt to environmental protection regulations, improve the overall stability and the structural strength of the packaging box in the four-corner area from different aspects, make it easy to pass the drop test, and improve the protection effect and protection reliability.

[0093] Although the specific embodiments of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the utility model, and these changes and modifications all fall within the protection scope of the utility model.

Claims

1. A paper inner liner for a carton, characterised in that, The paper inner liner comprises upper and lower liners and a middle liner between the upper and lower liners; A plurality of protruding limiting paper blocks are arranged on the opposite surfaces between the upper and lower liners, at least part of the limiting paper blocks are arranged in the edge area of the upper and lower liners, and a plurality of limiting grooves formed by the limiting paper blocks are used for clamping the outer shape structure of the packaged object; A plurality of insertion slots are arranged on the upper and lower liners, a plurality of insertion tongues are arranged on the middle liner, the insertion tongues are inserted into the insertion slots to connect the middle liner with the upper and lower liners, and the middle liner is clamped on the surface of the middle part of the packaged object; A plurality of supporting paper blocks are arranged on the outer side of the upper and lower liners, and at least part of the supporting paper blocks are arranged in the corner area of the upper and lower liners.

2. A paper inner liner for a carton as claimed in claim 1, wherein, The thickness of the limiting paper block is greater than 30 mm.

3. The paper inner liner of a carton as defined in claim 1, wherein, The middle liner comprises paperboards which are connected with each other and are separated into a plurality of compartments, The paperboards are provided with slots which are consistent with the contour of the middle part of the packaged object, and form a limiting structure clamped on the surface of the middle part.

4. A paper inner liner for a carton as claimed in claim 3, wherein, The paperboards of the middle liner comprise first, second, third and fourth middle paperboards, the first and second middle paperboards are arranged in parallel and are spaced apart, the third and fourth middle paperboards are arranged in parallel and are spaced apart, and the two sides of the third middle paperboard and the two sides of the fourth middle paperboard are connected to the first and second middle paperboards; The first and second middle paperboards are provided with slots which are consistent with the contour of the middle part, and form the limiting structure.

5. A paper inner liner for a carton as claimed in claim 4, wherein, The paperboards of the first and second middle paperboards comprise a plurality of core papers which are stacked and bonded, and the extension direction of the core papers of the first and second middle paperboards is consistent with the stress direction of the packaged object.

6. A paper inner liner for a carton as claimed in claim 4, wherein, At least one separation paperboard is further arranged between the first and second middle paperboards, and the separation paperboard separates the space between the first and second middle paperboards into two separation chambers.

7. The paper inner liner of a carton as claimed in claim 1, wherein, The paper inner liner further comprises an auxiliary liner which is folded by a plurality of paperboards, the paperboards of the auxiliary liner are provided with trapezoidal slots and trapezoidal cards connected to the edges of the trapezoidal slots, the trapezoidal cards are used for the paperboards of the auxiliary liner to pass through the trapezoidal slots after folding, so as to lock the folded plurality of paperboards in the folded state.

8. The paper inner liner of a carton as claimed in claim 1, wherein, The packaged object is a range hood, the range hood comprises a smoke collecting cover, a fan cover and a decorative cover arranged outside the fan cover, part of the limiting grooves are used for clamping the lower surfaces of the smoke collecting cover and the fan cover, and the middle liner is clamped on the upper surface of the fan cover. The lower liner is further provided with an avoiding position for avoiding the hanging ear structure of the decorative cover and an avoiding hole for the hanging ear structure to pass through.

9. A paper inner liner for a carton as claimed in any one of claims 1 to 8, wherein, The material of the paper inner liner is corrugated paper.

10. A packaging box, characterized in that The packaging box comprises an outer packaging box body and the paper inner liner according to any one of claims 1-9, and the paper inner liner is arranged in the outer packaging box body.

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