Cigarette tow box with internally-buckled heaven and earth covers

Abstract

The tow box comprises inner covers, a surrounding plate and a lining plate, the surrounding plate extends in the height direction and is closed in the horizontal direction, the inner covers are arranged on the inner side of the top and the inner side of the bottom of the surrounding plate respectively and are arranged in a mirror image mode in the height direction relative to the inner covers, and the lining plate is arranged on the inner sides of the inner covers. A long-edge side plate and a wide-edge side plate are arranged on the side face of the inner cover, and a connecting unfolding structure, an arc angle sealing structure, a side face sealing structure and an extrusion deformation abutting structure are arranged between the long-edge side plate and the wide-edge side plate. In the turnover process, tows are placed in the box body, the tows have a certain size and weight, the surrounding plates are pushed to deform outwards in the horizontal direction, in the deformation process, the side edges of the surrounding plates bulge outwards, the corner positions of the surrounding plates are tightened inwards, the corner positions of the inner covers deform inwards through the arranged first bent sections and second bent sections, and therefore the inner covers can be turned over. And the corner angles are better attached to the deformed surrounding plate corner angles, gaps are reduced, and the interior of the box body is prevented from being polluted by the outside.

Description

Technical Field

[0001] The invention relates to a turnover box structure, in particular to a tow box for cigarettes with an inner buckled top and bottom cover. Background Art

[0002] The filter refers to the upper part of the cigarette, which is a tool specially designed for smokers. It can reduce the smoke, tar and suspended particles entering the mouth when smoking. The three main functions of cigarette filters include direct interception, inertial compression and diffusion precipitation. With the development of technology, the types of filters themselves have also changed greatly. Acetate fiber tow is widely used in filters.

[0003] Traditionally, raw materials are packaged and transported in folding cartons that can be opened from the top. However, in order to improve the turnover efficiency of materials, the volume of the box needs to be increased to accommodate more tows in a single transport.

[0004] However, the larger box body brings the problem of inconvenience in taking and putting. In the prior art, the Chinese utility model patent with application number "202121760873.4" discloses a full corrugated paper collective packaging box with a similar structure. The box body with a top and bottom cover can solve the problem of incompatibility between easy opening and volume to a certain extent, but the following problems still exist:

[0005] First, the silk bundles used for tobacco are relatively thin. Once the top and bottom cover of the box are enlarged, after loading a certain amount of goods, it is easy to deform at the corners and sides, resulting in gaps, causing the silk bundles to leak out or dust and impurities to enter. For the tobacco production process, this is an unacceptable turnover problem;

[0006] Second, the upper and lower covers of the existing boxes are external, and when the boxes are stacked on each other, they are easily scratched and damaged;

[0007] Third, if the upper and lower covers of the current box are built-in, the lower cover is easy to be detached during the assembly process (before packaging), which affects packaging. Summary of the invention

[0008] The object of the present invention is to provide a tobacco tow box with an inwardly buckled top and bottom cover, which has the advantages of convenient assembly and use.

[0009] The above technical objectives of the present invention are achieved through the following technical solutions: a tow box for cigarettes with an inner buckled top and bottom lid, comprising an inner lid, a surrounding plate and a lining plate, wherein the surrounding plate extends in the height direction and is closed in the horizontal direction, the inner lid is respectively arranged on the inner side of the top and the inner side of the bottom of the surrounding plate, and is mirror-imaged relative to the inner lid in the height direction, the lining plate is arranged on the inner side of the inner lid, and the side of the inner lid is provided with a long side plate and a wide side plate, and a connection and expansion structure, an arc angle sealing structure, a side sealing structure and an extrusion deformation abutment structure are respectively arranged between the long side plate and the wide side plate;

[0010] The connection and expansion structure includes clamping blocks arranged at both ends of the wide side panels in the length direction and clamping holes arranged in the length direction of the long side panels, the clamping holes are arranged horizontally, the clamping holes are fixed by deforming and clamping the two sides of the clamping blocks, and a moving area is formed between the clamping holes and the clamping slots for the long side panels and the wide side panels to expand outwards in the horizontal direction in the connected state;

[0011] The arc-angle sealing structure comprises a first bending section and a second bending section arranged between the wide side plate and the clamping block, and after the long side plate and the wide side plate are unfolded outward in the horizontal direction, the upper surfaces of the first bending section and the second bending section are stretched outward to fit the inner side surface of the enclosure plate;

[0012] The side sealing structure comprises sealing protrusions arranged on the outer surfaces of the wide side plates and the long side plates, the sealing protrusions extending along the length direction of the wide side plates and the long side plates, and the sealing protrusions abutting against the inner side of the enclosure plate;

[0013] The extrusion deformation abutment structure comprises an abutment block arranged at the end of the long side plate in the length direction, and the abutment block abuts against the inner side of the wide side plate and pushes the sealing protrusion toward the enclosure plate.

[0014] Preferably, the long side panels are bent and connected on both sides of the inner cover in the length direction, and the wide side panels are bent and connected on both sides of the inner cover in the width direction. The long side panels, wide side panels, connecting and unfolding structures, arc corner sealing structures, side sealing structures and extrusion deformation abutment structures are integrally cut and formed from plastic hollow panels, and the side sealing structure is extrusion-formed.

[0015] By adopting the above technical solution, the cost of one-piece punching and forming is lower. At the same time, all structures of the tow box are formed by one-piece punching, that is, hot pressing and extrusion. Compared with paper plastic, the plastic hollow board has better structural strength and friction and anti-collision performance during the turnover process, and also has the function of recycling and reuse.

[0016] Preferably, the side sealing structure further comprises an abutment groove, which is arranged on the other side of the sealing protrusion opposite to the wide side plate, the abutment groove corresponds to the end of the abutment block, and the abutment groove and the sealing protrusion are formed by one-time extrusion.

[0017] By adopting the above technical solution, the abutment groove is used to position the abutment block, and then the abutment block pushes the sealing protrusion outward to contact the inner wall of the enclosure.

[0018] Preferably, the longitudinal cross-section of the abutment groove and the sealing protrusion is arc-shaped, and at least two bending grooves are arranged in parallel at the connection positions of the long side panels, the wide side panels and the inner cover. The bending grooves extend along the length direction of the long side panels or the wide side panels, and reinforcement slopes are formed between adjacent bending grooves.

[0019] By adopting the above technical solution, the vertical transition is converted into an inclined transition by reinforcing the inclined surface and the bending groove, thereby strengthening the structural strength of the bending position of the inner cover.

[0020] Preferably, the upper surface of the block is provided with a first oblique section, a second oblique section and a horizontal section, the horizontal section is arranged at the outward end of the block, one end of the first oblique section is connected to the end of the horizontal section, the other end of the first oblique section extends obliquely downward and is connected to one end of the second oblique section, the other end of the second oblique section extends obliquely upward and is connected to the top of the wide side panel, and the movable area is surrounded by the extension lines of the first oblique section, the second oblique section and the horizontal section.

[0021] By adopting the above technical solution, a connecting effect is achieved. At the same time, the first oblique section and the second oblique section make the clamping block not directly stuck when connected to the clamping hole, but provide an outward deformation, so that the first bending section and the second bending section can be deformed inward.

[0022] Preferably, a third oblique section tilted upward is provided at the bottom of the block; when the wide side panels are unfolded outward, the second oblique section can be rotated to a horizontal state, and the tops of the two ends of the long side panels in the length direction are tilted downward to form a fourth oblique section.

[0023] By adopting the above technical solution, when the third oblique section is bent against the block, it plays a role in avoiding scratches on the bottom.

[0024] Preferably, the abutment block includes an upper bevel, a tip and a lower bevel, the extension line of the upper bevel coincides with the fourth bevel segment, and the tip cooperates with the abutment groove; in the die-cutting state, the third bevel segment is provided with a fifth bevel segment that fits with the lower bevel, so that the abutment block protrudes from the end of the long side panel.

[0025] By adopting the above technical solution, the fifth oblique section improves the structural strength of the bending position and is used to form the lower oblique edge of the abutment block.

[0026] Preferably, the arc corner sealing structure also includes a first unfolding mark, a bending mark and a second unfolding mark, the bending mark is arranged between the wide side plate and the card block, the bending mark extends along the height direction of the card block, the first unfolding mark and the second unfolding mark are respectively located on both sides of the horizontal direction of the bending mark, the bottoms of the first unfolding mark and the second unfolding mark extend to the lower part of the bending mark, the upper parts of the first unfolding mark and the second unfolding mark extend upward at an angle, the first unfolding mark is located on the card block, the second unfolding mark is located on the wide side plate, the first bending section is surrounded by the first unfolding mark and the bending mark, and the second bending section is surrounded by the second unfolding mark and the bending mark.

[0027] By adopting the above technical solution, the first unfolding mark, the bending mark and the second unfolding mark are all used to make the connection position between the wide side panel and the card block unfold in an arc shape, cooperating with the enclosure with inwardly deformed edges and corners, while ensuring the structural strength of the inner cover corner position.

[0028] Preferably, the width of the bending mark is 5-20 mm, the width of the first expansion mark and the second expansion mark is one tenth to one fifth of the bending mark, and the ends of the first expansion mark and the second expansion mark extend to the sealing protrusion position.

[0029] In summary, during use, the inner cover is placed at the bottom, and the wide side panels and the long side panels are connected by the cooperation of the clamping blocks and the clamping holes around the inner cover, and then the lining board is placed in the inner cover, and the surrounding board surrounds the inner cover, and then the tow is placed in the space enclosed between the surrounding board and the inner cover at the bottom. When it is full, another inner cover is placed in the lining board and buckled upside down to the top of the surrounding board to close the top, and then the box is packed with a cable tie;

[0030] First, during the turnover process, a wire bundle is placed in the box. The wire bundle has a certain volume and weight, which pushes the enclosure to deform outward in the horizontal direction. During the deformation process, the side of the enclosure bulges outward, and the corners are tightened inward. Through the first bending section and the second bending section, the inner cover is deformed inward at the corners, which better fits the corners of the deformed enclosure, reduces the generation of gaps, avoids external pollution in the box, and prevents the wire bundle from leaking out;

[0031] Second, during the turnover process, the inner cover is located inside the coaming, so there is no problem of adjacent inner walls scratching each other during the turnover process;

[0032] Third, in the process of placing the tow, the inner cover at the bottom increases the friction area between the inner cover and the enclosure through the sealing bulge, thereby increasing the friction force and preventing the inner cover and the enclosure from falling off at will when the cable tie is not installed;

[0033] Fourthly, under the action of the abutment block, the sealing protrusion is fixed to a certain extent in a sealing state in which it always fits the inner wall of the enclosure, thereby improving the sealing effect between the inner cover and the enclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of the packaging turnover state of the embodiment;

[0035] Figure 2 is an exploded schematic diagram of an embodiment;

[0036] Figure 3 yes Figure 2 An enlarged schematic diagram of part A is shown;

[0037] Figure 4 This is a die-cutting diagram of the inner cover of the embodiment in an open state;

[0038] Figure 5 yes Figure 4 The enlarged schematic diagram of part B is shown;

[0039] Figure 6 is a schematic diagram of a partial state of the inner cover of the embodiment;

[0040] Figure 7 yes Figure 6 An enlarged schematic diagram of part C is shown;

[0041] Figure 8 is a partial schematic diagram of the inner side of the inner cover of the embodiment;

[0042] Fig. 9 is a partial cross-sectional view of the embodiment between the enclosure and the inner cover;

[0043] Fig.10 It is a schematic diagram of the structure of the embodiment at the corner position of the enclosure and the inner cover;

[0044] In the figure, 1, enclosure; 11, lining plate; 12, cable tie; 2, inner cover; 21, long side panel; 211, fourth oblique section; 22, wide side panel; 23, bending groove; 24, reinforcement slope; 31, clamping hole; 32, clamping block; 33, first oblique section; 34, second oblique section; 35, horizontal section; 36, third oblique section; 37, fifth oblique section; 41, first bending section; 42, second bending section; 43, first unfolding mark; 44, bending mark; 45, second unfolding mark; 51, sealing protrusion; 61, abutment block; 62, upper bevel; 63, tip; 64, lower bevel; 65, abutment groove. DETAILED DESCRIPTION

[0045] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0046] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0047] Example:

[0048] like Figure 1 Disclosed is a packaging state of a tobacco tow box with an inwardly buckled top and bottom lid, wherein the inwardly buckled means that an inner lid 2 is installed on the inner side of a board, that is, the inner lid 2 serves as a top lid and a bottom lid in the top and bottom lids of the top and bottom lids, and covers the top and bottom of the inner side of a surrounding board 1, so that the inner lid 2 is arranged in a mirror image in the height direction of the surrounding board 1. Figure 2 It is an exploded view of a tobacco tow box with an inward-hinged top and bottom cover, the main body of which includes an inner cover 2, a surrounding plate 1 and a lining plate 11.

[0049] like Figure 1 and Figure 2 As shown, the enclosure 1 extends in the height direction and is closed in the horizontal direction, that is, the enclosure 1 is a rectangular parallelepiped with upper and lower openings formed by bending four times. At the same time, the enclosure 1 can be closed by overlapping the sides or by hot pressing and integrally forming at the bending position according to the needs of use. The former is easy to connect, and the latter occupies little space for recycling and saves materials.

[0050] like Figure 2 As shown, in order to prevent the tow from directly contacting the inner side of the inner cover 2, a lining plate 11 is provided on the inner side of the inner cover 2. Figure 4 As shown, Figure 4 It is the die-cutting diagram of the inner cover 2, that is, the inner cover 2 is formed by die-cutting an S-shaped plastic hollow plate, and has better structural strength and anti-bending performance. The inner cover 2 is surrounded by a long side panel 21, that is, the long side position of the inner cover 2 is provided, and the wide side panel 22 is provided at the wide side position of the inner cover 2. At the same time, the long side panel 21 and the inner cover 2 are bent and erected at the dotted line position, and the wide side panel 22 and the inner cover 2 are also bent and erected at the dotted line position.

[0051] The long side panels 21 and the wide side panels 22 are provided with structures for connecting, sealing and improving friction, including a connecting and unfolding structure, an arc-angle sealing structure, a side sealing structure and an extrusion deformation abutment structure. The long side panels 21, the wide side panels 22, the connecting and unfolding structure, the arc-angle sealing structure, the side sealing structure and the extrusion deformation abutment structure are formed by integrally cutting from a plastic hollow plate, and the side sealing structure is formed by extrusion molding or hot pressing.

[0052] like Figures 3 to 8As shown, the connecting and unfolding structure serves to connect the long side panels 21 and the wide side panels 22, and includes a clamping block 32 arranged at both ends of the wide side panels 22 in the length direction, and a clamping hole 31 is correspondingly arranged at both ends of the long side panels 21 in the length direction. The clamping hole 31 is horizontally arranged and extends, and the clamping hole 31 is a linear cutting hole. The clamping hole 31 increases the friction force by deformation to clamp the two sides of the clamping block 32 to fix the clamping block 32. At the same time, as shown in FIG. Figure 6 and Figure 7 As shown, the card block 32 can move in the length direction of the card hole 31, so as to realize retraction and expansion between the wide side panel 22 and the long side panel 21, that is, a moving area is formed between the card hole 31 and the card slot for the long side panel 21 and the wide side panel 22 to expand outward in the horizontal direction when connected.

[0053] like Figure 4 As shown, the specific structure of the block 32 and the movable area is that the upper surface of the block 32 is provided with a first oblique section 33, a second oblique section 34 and a horizontal section 35, the horizontal section 35 is provided at the outward end of the block 32, one end of the first oblique section 33 is connected to the end of the horizontal section 35, the other end of the first oblique section 33 extends downwardly and is connected to one end of the second oblique section 34, the other end of the second oblique section 34 extends upwardly and is connected to the top of the wide side panel 22, and the movable area is surrounded by the extension lines of the first oblique section 33, the second oblique section 34 and the horizontal section 35; in order to avoid scratches on the bottom of the block 32, the bottom of the block 32 is provided with a third oblique section 36 inclined upward, when the wide side panel 22 is unfolded outward, the second oblique section 34 can be rotated to a horizontal state, and the tops of the two ends of the long side panel 21 in the length direction are inclined downward to form a fourth oblique section 211, so that the wide side panel 22 can rotate inward.

[0054] like Figures 4 to 10As shown, when the inner cover 2 is installed on the enclosure 1, the wide side panels 22 and the long side panels 21 need to be deformed inwardly (especially at the corners). After the installation is completed, the wide side panels 22 and the long side panels 21 need to be opened outwardly to clamp the inner side surface of the enclosure 1. The above problem is solved by setting an arc-angle sealing structure. The arc-angle sealing structure includes a first bending section 41 and a second bending section 42 arranged between the wide side panels 22 and the clamping block 32. After the long side panels 21 and the wide side panels 22 are expanded outwardly in the horizontal direction, the upper surfaces of the first bending section 41 and the second bending section 42 are stretched outward and fit against the inner side surface of the enclosure 1. Because the fourth oblique section 211 is provided, the first bending section 41 and the second bending section 42 can be retracted inwardly; the structure formed by the first bending section 41 and the second bending section 42 is that the arc-angle sealing structure also includes a first expansion mark 4 3. The bending mark 44 and the second expansion mark 45. The first expansion mark 43 and the second expansion mark 45 are formed by hot pressing and have a smaller width (because the bending angle is smaller), while the bending mark 44 is formed by hot pressing and has a larger width. The bending mark 44 is arranged between the wide side plate 22 and the block 32, and the bending mark 44 extends along the height direction of the block 32. The first expansion mark 43 and the second expansion mark 45 are respectively located on both sides of the bending mark 44 in the horizontal direction. The bottoms of the first expansion mark 43 and the second expansion mark 45 extend to the lower part of the bending mark 44, and the upper parts of the first expansion mark 43 and the second expansion mark 45 extend upward at an angle. The first expansion mark 43 is located on the block 32, and the second expansion mark 45 is located on the wide side plate 22. The first bending section 41 is surrounded by the first expansion mark 43 and the bending mark 44, and the second bending section 42 is surrounded by the second expansion mark 45 and the bending mark 44.

[0055] like Figure 6 As shown, the width of the bending mark 44 is 5-20 mm, 15 mm in this embodiment, the width of the first expansion mark 43 and the second expansion mark 45 is one tenth to one fifth of the bending mark 44, and the ends of the first expansion mark 43 and the second expansion mark 45 extend to the sealing protrusion 51. Since the width of the bending mark 44 is wider, the ends of the first expansion mark 43 and the second expansion mark 45 are directly connected to the middle and lower part of the bending mark 44, thereby improving the structural strength of the bottom of the corner position.

[0056] like Figure 5 , Figure 7 and Figure 8As shown, in order to ensure the friction between the inner cover 2 and the enclosure 1, the side sealing structure includes a sealing protrusion 51 arranged on the outer surface of the wide side plate 22 and the outer surface of the long side plate 21, and the sealing protrusion 51 extends along the length direction of the wide side plate 22 and the long side plate 21. The sealing protrusion 51 abuts against the inner side of the enclosure 1, and the side sealing structure also includes an abutment groove 65, which is arranged on the other side of the sealing protrusion 51 opposite to the wide side plate 22, and the abutment groove 65 corresponds to the end of the abutment block 61. The longitudinal section shape of the abutment groove 65 and the sealing protrusion 51 is arc-shaped, and the abutment groove 65 and the sealing protrusion 51 are formed by one-time extrusion.

[0057] like Figure 7 and Figure 8 As shown, in order to avoid right-angle transition between the inner cover 2 and the long side panel 21, and between the inner cover 2 and the wide side panel 22, at least two bending grooves 23 are arranged in parallel at the connection positions of the long side panel 21, the wide side panel 22 and the inner cover 2. The bending grooves 23 extend along the length direction of the long side panel 21 or the wide side panel 22, and reinforcing inclined surfaces 24 are formed between adjacent bending grooves 23.

[0058] like Figures 4 to 7 As shown, in order to prevent the sealing protrusion 51 from retracting, a structure for pushing the sealing protrusion 51 outward is provided on the long side plate 21, and the extrusion deformation abutment structure includes an abutment block 61 provided at the end of the long side plate 21 in the length direction, the abutment block 61 abuts against the inner side of the wide side plate 22 and pushes the sealing protrusion 51 toward the enclosure 1, the abutment block 61 includes an upper bevel 62, a tip 63 and a lower bevel 64, the extension line of the upper bevel 62 coincides with the fourth oblique section 211, and the tip 63 cooperates with the abutment groove 65; as shown Figure 4 and Figure 5 As shown, in the die-cutting state, the third oblique section 36 is provided with a fifth oblique section 37 that fits with the lower oblique edge 64 , so that the abutment block 61 protrudes from the end of the long side plate 21 .

[0059] Working principle:

[0060] When the tow is packed in the box, the tow is placed in the box. The tow has a certain volume and weight, which pushes the enclosure 1 to deform outward in the horizontal direction. Fig. 9 As shown, during the deformation process, the sides of the enclosure 1 bulge outward, and the corners of the inner cover 2 are tightened inward. By setting the first bending section 41 and the second bending section 42, the inner cover 2 is deformed inward at the corners, and better fits with the corners of the deformed enclosure 1, reducing the generation of gaps, avoiding external pollution inside the box, and preventing the bundle from leaking. At the same time, during transportation, the abutment block 61 is always abutted against the sealing protrusion 51, and under the joint action of the cable tie 12, dust entry is reduced.

Claims

1. A tow box for cigarettes with an inward-locked top and bottom cover, characterized in that: The invention comprises an inner cover (2), an enclosure (1) and a lining plate (11), wherein the enclosure (1) extends in the height direction and is closed in the horizontal direction, the inner cover (2) is respectively arranged on the inner side of the top and the inner side of the bottom of the enclosure (1) and is arranged in a mirror image with respect to the inner cover (2) in the height direction, the lining plate (11) is arranged on the inner side of the inner cover (2), and the side of the inner cover (2) is provided with a long side plate (21) and a wide side plate (22), and a connection and expansion structure, an arc angle sealing structure, a side sealing structure and an extrusion deformation abutment structure are respectively arranged between the long side plate (21) and the wide side plate (22); The connection and expansion structure comprises a clamping block (32) arranged at both ends of the wide side plate (22) in the length direction and a clamping hole (31) arranged in the length direction of the long side plate (21); the clamping hole (31) is arranged horizontally, and the clamping hole (31) is fixed by deforming and clamping the two sides of the clamping block (32); a moving area is formed between the clamping hole (31) and the clamping slot for the long side plate (21) and the wide side plate (22) to expand outward in the horizontal direction in the connected state; The arc-angle sealing structure comprises a first bending section (41) and a second bending section (42) arranged between the wide side plate (22) and the clamping block (32); after the long side plate (21) and the wide side plate (22) are unfolded outward in the horizontal direction, the upper surfaces of the first bending section (41) and the second bending section (42) are stretched outward to fit with the inner side surface of the enclosure (1); The side sealing structure comprises a sealing protrusion (51) arranged on the outer surface of the wide side plate (22) and the outer surface of the long side plate (21), the sealing protrusion (51) extending along the length direction of the wide side plate (22) and the long side plate (21), and the sealing protrusion (51) abuts against the inner side of the enclosure plate (1); The extrusion deformation abutment structure comprises an abutment block (61) arranged at the end of the long side plate (21) in the length direction, and the abutment block (61) abuts against the inner side of the wide side plate (22) and pushes the sealing protrusion (51) towards the enclosure (1).

2. The inward-hinged top and bottom cover tow box for cigarettes according to claim 1, characterized in that: The long side panels (21) are bent and connected to both sides of the inner cover (2) in the length direction, and the wide side panels (22) are bent and connected to both sides of the inner cover (2) in the width direction. The long side panels (21), the wide side panels (22), the connection and expansion structure, the arc angle sealing structure, the side sealing structure and the extrusion deformation abutment structure are integrally cut and formed from a plastic hollow plate, and the side sealing structure is extrusion-formed.

3. The inward-hinged top and bottom cover cigarette tow box according to claim 2, characterized in that: The side sealing structure further comprises an abutment groove (65), wherein the abutment groove (65) is arranged on the other side of the sealing protrusion (51) opposite to the wide side plate (22), the abutment groove (65) corresponds to the end of the abutment block (61), and the abutment groove (65) and the sealing protrusion (51) are formed by one-time extrusion.

4. The inward-hinged top and bottom cover cigarette tow box according to claim 3, characterized in that: The longitudinal cross-section of the abutment groove (65) and the sealing protrusion (51) is in an arc shape. At least two bending grooves (23) are arranged in parallel at the connection positions of the long side plate (21), the wide side plate (22) and the inner cover (2). The bending grooves (23) extend along the length direction of the long side plate (21) or the wide side plate (22), and reinforcement inclined surfaces (24) are formed between adjacent bending grooves (23).

5. The inward-hinged top and bottom cover cigarette tow box according to claim 2, characterized in that: The upper surface of the block (32) is provided with a first oblique section (33), a second oblique section (34) and a horizontal section (35); the horizontal section (35) is provided at the outward end of the block (32); one end of the first oblique section (33) is connected to the end of the horizontal section (35); the other end of the first oblique section (33) extends obliquely downward and is connected to one end of the second oblique section (34); the other end of the second oblique section (34) extends obliquely upward and is connected to the top of the wide side plate (22); and the moving area is surrounded by the extension lines of the first oblique section (33), the second oblique section (34) and the horizontal section (35).

6. The inward-hinged top and bottom cover tow box for cigarettes according to claim 5, characterized in that: The bottom of the block (32) is provided with a third oblique section (36) inclined upward; when the wide side panel (22) is unfolded outward, the second oblique section (34) can be rotated to a horizontal state, and the tops of both ends of the long side panel (21) in the length direction are inclined downward to form a fourth oblique section (211).

7. The inward-hinged top and bottom cover tow box for cigarettes according to claim 6, characterized in that: The abutment block (61) comprises an upper bevel (62), a tip (63) and a lower bevel (64); an extension line of the upper bevel (62) coincides with the fourth bevel section (211), and the tip (63) cooperates with the abutment groove (65); in the die-cutting state, a fifth bevel section (37) is provided on the third bevel section (36) and is in contact with the lower bevel (64), so that the abutment block (61) protrudes from the end of the long side plate (21).

8. The inward-hinged top and bottom cover tow box for cigarettes according to claim 7, characterized in that: The arc angle sealing structure further comprises a first unfolding mark (43), a bending mark (44) and a second unfolding mark (45); the bending mark (44) is arranged between the wide side plate (22) and the clamping block (32); the bending mark (44) extends along the height direction of the clamping block (32); the first unfolding mark (43) and the second unfolding mark (45) are respectively located on both sides of the bending mark (44) in the horizontal direction; the bottoms of the first unfolding mark (43) and the second unfolding mark (45) extend to the lower part of the bending mark (44); the upper parts of the first unfolding mark (43) and the second unfolding mark (45) extend upwardly at an angle; the first unfolding mark (43) is located on the clamping block (32); the second unfolding mark (45) is located on the wide side plate (22); the first bending section (41) is surrounded by the first unfolding mark (43) and the bending mark (44); the second bending section (42) is surrounded by the second unfolding mark (45) and the bending mark (44).

9. The inward-hinged top and bottom cover tow box for cigarettes according to claim 8, characterized in that: The width of the bending mark (44) is 5-20 mm, the width of the first expansion mark (43) and the second expansion mark (45) is one tenth to one fifth of the width of the bending mark (44), and the ends of the first expansion mark (43) and the second expansion mark (45) extend to the position of the sealing protrusion (51).

Images