Self-locking structure of food packaging carton

Abstract

The utility model provides a self-locking structure of a food packaging carton, which relates to the technical field of self-locking structures of packaging cartons, and comprises a self-locking device and a limiting device which are arranged on a carton body, the self-locking device is arranged between the carton body and a cover plate on the carton body, the limiting device is arranged on one side of the cover plate of the carton body, and the limiting device is arranged on the other side of the cover plate of the carton body. The self-locking device comprises a concave plate and a rectangular plate, the concave plate is fixedly connected with the box body, the rectangular plate is fixedly connected with the cover plate part of the box body, and the size and the shape of the surface of the rectangular plate are matched with the size and the shape of the inner wall of the concave plate; by arranging the self-locking device, the cover plate at the top of the box body can be limited and fixed, and the situation that food in the box body accidentally extrudes the cover plate at the top of the box body in the moving process of the box body, so that the opening position of the box body is not shielded, and the food falls off from the box body is reduced; and the packaging stability and the transportation safety of the box body to the food are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of self-locking structures for packaging boxes, and in particular to a self-locking structure for a food packaging paper box. Background Technology

[0002] As the name suggests, packaging boxes are boxes used to package products. Food packaging boxes are one type of packaging box. In the food production process, food packaging boxes are needed to package food, which not only facilitates the transportation of food, but also makes the food look appealing.

[0003] Existing self-locking structures for food packaging cartons are divided into top self-locking and bottom self-locking structures. When using the packaging cartons, the box body is opened first, and multiple bottom plates are interlocked to achieve a self-locking mechanism at the bottom of the box. Then, the food is placed inside the box, and the insert plate on one side of the cover is inserted into the inside of the box to limit and lock the cover, thereby achieving a self-locking mechanism at the top of the box, thus completing the rapid packaging of the food.

[0004] However, since the existing self-locking mechanism of box lids mostly uses an insert plate directly inserted into the box body and fixed by friction between the two, food may be squeezed against the lid during transportation, causing the pressure on the lid to exceed the friction between the insert plate and the inner wall of the box. This causes the insert plate to leave the box body and release the lid from the top of the box, allowing the food to fall out of the box and affecting the safety of the food packaging. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a self-locking structure for food packaging boxes.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a self-locking structure for a food packaging paper box, comprising a self-locking device and a limiting device disposed on the box body. The self-locking device is disposed between the box body and the cover plate on the box body, and the limiting device is disposed on one side of the cover plate of the box body. The self-locking device comprises a concave plate and a rectangular plate. The concave plate is fixedly connected to the box body, and the rectangular plate is fixedly connected to the cover plate portion of the box body. The surface size and shape of the rectangular plate are adapted to the inner wall size and shape of the concave plate. Two clamping plates are symmetrically fixedly connected to one side of the concave plate. Each of the two clamping plates has a through hole on one side, and a positioning rod is fixedly connected to the inner wall of each of the two through holes. A connecting block is fixedly connected to one side of the rectangular plate. Two L-shaped grooves are symmetrically opened on one side of the connecting block. The inner wall of the through hole is slightly larger than the surface of the connecting block, and the surface of the positioning rod is slidably connected to the inner wall of the L-shaped groove.

[0007] The effect achieved by the above components is as follows: By setting a self-locking device, all components of the self-locking device are made of cardboard. Manually moving the box cover causes the cover to move the rectangular plate, which in turn moves the connecting block. When the box cover completely closes the box opening, the rectangular plate moves into the recessed plate. Then, manually rotating the two locking plates causes them to move simultaneously towards the connecting block, while bending them near the positioning rod. When both locking plates are near the connecting block, they fit through the through-hole onto the connecting block surface. Finally, manually pressing the bent positions of the two locking plates near the positioning rod further bends them. The two positioning rods move into the two L-shaped grooves. When the two positioning rods move simultaneously and are engaged in the L-shaped grooves and positioned at the short leg of the L-shaped groove, the two positioning rods are fixed inside the two L-shaped grooves. This positions the rectangular plate between the concave plate and the two locking plates, and the connecting block is positioned inside the two through holes. At this time, the positioning rods, together with the two locking plates, limit the connecting block, which in turn limits the rectangular plate and the top cover of the box. This achieves self-locking fixation of the box cover, reducing the possibility of food inside the box accidentally squeezing open the top cover during the movement of the box, resulting in an unobstructed opening and food falling out of the box. This improves the packaging stability and transportation safety of the box.

[0008] Preferably, the inner walls of both L-shaped grooves are fixedly connected to limit blocks, and the surfaces of the limit blocks are trapezoidal.

[0009] The effect achieved by the above components is that by setting a limiting block, the limiting block can intercept the positioning rod entering the L-shaped groove, reducing the possibility of the positioning rod accidentally sliding out of the L-shaped groove.

[0010] Preferably, the connecting block has beveled edges near the inner walls of the two L-shaped grooves.

[0011] The effect achieved by the above components is that by setting the bevel angle, the inlet width of the L-shaped groove can be increased, making it easier for personnel to insert the positioning rod into the L-shaped groove.

[0012] Preferably, two stops are symmetrically fixedly connected to one side of the rectangular plate.

[0013] The effect achieved by the above components is as follows: by setting the stops, when the two clamping plates wrap around the surface of the rectangular plate, the two stops are respectively attached to the surface of the two clamping plates and assist in intercepting the rectangular plate. The two clamping plates can further improve the interception effect of the rectangular plate by limiting the two stops, and reduce the possibility of the rectangular plate sliding inside the two clamping plates.

[0014] Preferably, a reinforcing block is fixedly connected to one side of the concave plate, and the reinforcing block is fixedly connected to the box body.

[0015] The effect achieved by the above components is that by setting up reinforcing blocks, the connection strength between the concave plate and the box body can be increased, reducing the possibility of the concave plate separating from the box body when subjected to force.

[0016] Preferably, the limiting device includes an intercepting rod, which is fixedly connected to a cover plate on the box body. A perforated plate is fixedly connected to one side of the intercepting rod, and a round shaft is rotatably connected to one side of the box body. A positioning block is fixedly connected to the end of the round shaft away from the box body. The surface of the round shaft is smaller than the inner wall of the perforated plate, and the surface size and shape of the positioning block are adapted to the size and shape of the inner wall of the perforated plate.

[0017] The effect achieved by the above components is as follows: By setting a limiting device, the intercepting rod and perforated plate are made of plastic, while the round shaft and positioning block can be made of metal or plastic. At this time, the cover plate on the box is manually moved, causing the cover plate to move the intercepting rod and perforated plate. When the cover plate on the box moves to the position that completely closes the top opening of the box, the perforated plate is manually moved. When the perforated plate moves to the position that fits on the surface of the round shaft and positioning block, the positioning block is manually rotated. When the positioning block rotates to the position that forms a cross with the inner wall of the perforated plate, the positioning block intercepts the perforated plate. The perforated plate, together with the intercepting rod, assists in intercepting and limiting the cover plate on the box, reducing the possibility of the cover plate bulging or denting when squeezed by food or external objects, causing the cover plate to squeeze the food inside the box, affecting food safety and food integrity, and improving the stability of the cover plate.

[0018] Preferably, a rubber pad is fixedly connected to one side of the perforated plate, the inner wall of the rubber pad is larger than the surface of the positioning block, and the surface of the rubber pad is provided with multiple anti-slip protrusions.

[0019] The effect achieved by the above components is that by setting rubber pads, the rubber pads can increase the fit between the positioning block and the surface of the perforated plate, and at the same time increase the friction between the positioning block and the perforated plate, reducing the rotation of the positioning block during use.

[0020] Preferably, the surface of the interceptor bar is fixedly connected with a plurality of reinforcing ribs, and the plurality of reinforcing ribs are arranged at equal intervals.

[0021] The effect achieved by the above components is that by setting reinforcing ribs, the strength of the interceptor bar can be increased, reducing the possibility of deformation or breakage of the interceptor bar during use.

[0022] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0023] In this invention, a self-locking device is provided to limit and fix the top cover of the box, reducing the possibility that food inside the box may accidentally squeeze open the top cover during movement, resulting in the box opening being unobstructed and food falling out of the box. This improves the packaging stability and transportation safety of the box. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This utility model Figure 1 A schematic diagram of a partial structure;

[0026] Figure 3 This is a partial structural schematic diagram of the concave plate of this utility model;

[0027] Figure 4 This is a partial structural schematic diagram of the rectangular plate of this utility model;

[0028] Figure 5 This is a partial structural schematic diagram of the interceptor bar of this utility model;

[0029] Figure 6 This is a partial structural schematic diagram of the perforated plate of this utility model.

[0030] Legend: 1. Self-locking device; 11. Concave plate; 12. Clamping plate; 13. Through hole; 14. Positioning rod; 15. Reinforcing block; 16. Rectangular plate; 17. Connecting block; 18. L-shaped groove; 19. Limiting block; 110. Angled angle; 111. Stop block; 2. Limiting device; 21. Intercepting rod; 22. Reinforcing rib; 23. Perforated plate; 24. Round shaft; 25. Positioning block; 26. Rubber pad; 3. Box body. Detailed Implementation

[0031] Reference Figure 1-6As shown, this embodiment discloses a self-locking structure for a food packaging paper box, including a self-locking device 1 and a limiting device 2 disposed on the box body 3. The self-locking device 1 is disposed between the box body 3 and the cover plate on the box body 3, and the limiting device 2 is disposed on one side of the cover plate of the box body 3. The self-locking device 1 includes a concave plate 11 and a rectangular plate 16. The concave plate 11 is fixedly connected to the box body 3, and the rectangular plate 16 is fixedly connected to the cover plate portion of the box body 3. The surface size and shape of the rectangular plate 16 are adapted to the inner wall size and shape of the concave plate 11. Two locking plates 12 are symmetrically fixedly connected to one side of the concave plate 11. Each of the two locking plates 12 has a through hole 13 on one side. The inner walls of the box are fixedly connected with positioning rods 14. A connecting block 17 is fixedly connected to one side of the rectangular plate 16. Two L-shaped grooves 18 are symmetrically opened on one side of the connecting block 17. The inner wall of the through hole 13 is slightly larger than the surface of the connecting block 17. The surface of the positioning rod 14 is slidably connected to the inner wall of the L-shaped groove 18. By setting a self-locking device 1, all parts of the self-locking device 1 are made of cardboard. At this time, the cover of the box 3 is manually moved, so that the cover of the box 3 drives the rectangular plate 16 to move, so that the rectangular plate 16 drives the connecting block 17 to move. When the cover of the box 3 moves to the position that completely closes the opening of the box 3, the rectangular plate 16 moves to insert the concave plate 11. Inside, manually rotate the two retaining plates 12 to move them simultaneously towards the connecting block 17, and bend them near the positioning rods 14. When both retaining plates 12 are close to the connecting block 17, they fit onto the surface of the connecting block 17 through the through holes 13. Then, manually press the bent positions of the two retaining plates 12 near the positioning rods 14, causing them to move the two positioning rods 14 into the two L-shaped grooves 18. When the two positioning rods 14 are simultaneously engaged in the L-shaped grooves 18 and positioned at the short legs, the two positioning rods... The rod 14 is fixed inside the two L-shaped grooves 18, so that the rectangular plate 16 is located between the concave plate 11 and the two clamping plates 12, and the connecting block 17 is located inside the two through holes 13. At this time, the positioning rod 14, together with the two clamping plates 12, limits the connecting block 17, so that the connecting block 17 limits the rectangular plate 16 and the top cover of the box body 3, thereby achieving self-locking fixation of the cover of the box body 3. This reduces the possibility that the food inside the box body 3 will accidentally squeeze open the top cover of the box body 3 during the movement of the box body 3, resulting in the opening of the box body 3 being unobstructed and causing the food to fall out of the box body 3. This improves the packaging stability and transportation safety of the box body 3 for food.

[0032] Reference Figure 2 , Figure 3 and Figure 4As shown in the figure, this embodiment discloses that the inner walls of the two L-shaped grooves 18 are fixedly connected with limiting blocks 19. The surface of the limiting blocks 19 is trapezoidal. By setting the limiting blocks 19, the limiting blocks 19 can intercept the positioning rods 14 entering the L-shaped grooves 18, reducing the possibility of the positioning rods 14 accidentally sliding out of the L-shaped grooves 18. The connecting blocks 17 are provided with bevels 110 near the inner walls of the two L-shaped grooves 18. By setting the bevels 110, the bevels 110 can increase the entrance width of the L-shaped grooves 18, making it easier for personnel to insert the positioning rods 14 into the L-shaped grooves 18.

[0033] Reference Figure 2 , Figure 3 and Figure 4 As shown, this embodiment discloses two stops 111 symmetrically fixedly connected to one side of the rectangular plate 16. By setting the stops 111, when the two clamping plates 12 wrap around the surface of the rectangular plate 16, the two stops 111 respectively adhere to the surface of the two clamping plates 12 and assist in intercepting the rectangular plate 16. The two clamping plates 12 can further improve the interception effect of the rectangular plate 16 by limiting the two stops 111, and reduce the possibility of the rectangular plate 16 sliding inside the two clamping plates 12. A reinforcing block 15 is fixedly connected to one side of the concave plate 11. The reinforcing block 15 is fixedly connected to the box body 3. By setting the reinforcing block 15, the reinforcing block 15 can increase the connection strength between the concave plate 11 and the box body 3, and reduce the possibility of the concave plate 11 separating from the box body 3 when subjected to force.

[0034] Reference Figure 5 and Figure 6As shown, this embodiment discloses a limiting device 2 including an intercepting rod 21, which is fixedly connected to a cover plate on the box body 3. A perforated plate 23 is fixedly connected to one side of the intercepting rod 21, and a round shaft 24 is rotatably connected to one side of the box body 3. A positioning block 25 is fixedly connected to the end of the round shaft 24 away from the box body 3. The surface of the round shaft 24 is smaller than the inner wall of the perforated plate 23, and the size and shape of the surface of the positioning block 25 are adapted to the size and shape of the inner wall of the perforated plate 23. By setting the limiting device 2, the intercepting rod 21 and the perforated plate 23 are made of plastic, while the round shaft 24 and the positioning block 25 can be made of metal or plastic. At this time, the cover plate on the box body 3 is manually moved, so that the cover plate moves the intercepting rod 21 and the perforated plate 23. When the cover plate 23 moves, the perforated plate 23 is manually moved when it moves to the position that completely closes the top opening of the box body 3. When the perforated plate 23 moves to the position that fits on the surface of the round shaft 24 and the positioning block 25, the positioning block 25 is manually rotated. When the positioning block 25 rotates to the position that intersects with the inner wall of the perforated plate 23, the positioning block 25 intercepts the perforated plate 23. The perforated plate 23, together with the intercepting rod 21, assists in intercepting and limiting the cover plate on the box body 3. This reduces the possibility of the cover plate on the box body 3 bulging or denting when squeezed by food or external objects, which could cause the cover plate to squeeze the food inside the box body 3, affecting food safety and food integrity. This improves the stability of the cover plate.

[0035] Reference Figure 5 and Figure 6 As shown in the figure, this embodiment discloses that a rubber pad 26 is fixedly connected to one side of the perforated plate 23. The inner wall of the rubber pad 26 is larger than the surface of the positioning block 25. The surface of the rubber pad 26 is provided with multiple anti-slip protrusions. By setting the rubber pad 26, the rubber pad 26 can increase the fit between the positioning block 25 and the surface of the perforated plate 23, and at the same time increase the friction between the positioning block 25 and the perforated plate 23, reducing the rotation of the positioning block 25 during use. Multiple reinforcing ribs 22 are fixedly connected to the surface of the intercepting rod 21. The multiple reinforcing ribs 22 are arranged at equal intervals. By setting the reinforcing ribs 22, the reinforcing ribs 22 can increase the strength of the intercepting rod 21, reducing the deformation or breakage of the intercepting rod 21 during use.

[0036] Working principle: First, all components of the self-locking device 1 are made of cardboard, the same material as the box body 3. Manually move the cover of the box body 3, causing the cover to move the rectangular plate 16, which in turn moves the connecting block 17. When the cover of the box body 3 completely closes the opening, the rectangular plate 16 moves into the recessed plate 11. Then, manually rotate the two locking plates 12, causing them to move simultaneously towards the connecting block 17. Simultaneously, bend the two locking plates 12 near the positioning rod 14. When both locking plates 12 are close to the connecting block 17, they pass through the through hole 13 and fit onto the surface of the connecting block 17. At this point, manually press the two clamping plates 12 near the bent position of the positioning rod 14, so that the bent position of the two clamping plates 12 drives the two positioning rods 14 to move into the two L-shaped grooves 18. When the two positioning rods 14 move simultaneously into the L-shaped grooves 18 and are located at the short leg position of the L-shaped grooves 18, the two positioning rods 14 are fixed inside the two L-shaped grooves 18, so that the rectangular plate 16 is located between the concave plate 11 and the two clamping plates 12, and the connecting block 17 is located inside the two through holes 13. At this time, the positioning rods 14 cooperate with the two clamping plates 12 to limit the connecting block 17, so that the connecting block 17 limits the rectangular plate 16 and the cover plate on the top of the box 3, thereby achieving self-locking fixation of the cover plate of the box 3.

[0037] First, the intercepting rod 21 and the perforated plate 23 are made of plastic, while the round shaft 24 and the positioning block 25 can be made of metal or plastic. At this time, the cover plate on the box body 3 is manually moved, so that the cover plate drives the intercepting rod 21 and the perforated plate 23 to move. When the cover plate on the box body 3 moves to the position that completely closes the top opening of the box body 3, the perforated plate 23 is manually moved. When the perforated plate 23 moves to the position that fits on the surface of the round shaft 24 and the positioning block 25, the positioning block 25 is manually rotated. When the positioning block 25 rotates to the position that forms a cross with the inner wall of the perforated plate 23, the positioning block 25 intercepts the perforated plate 23, so that the perforated plate 23, together with the intercepting rod 21, provides auxiliary limiting for the cover plate on the box body 3, intercepting food inside the box body 3 or external objects, thereby achieving auxiliary reinforcement of the cover plate.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may use the disclosed technical content to make changes or modifications to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the scope of the utility model's technical solution, still fall within the protection scope of this utility model's technical solution. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through specific circumstances.

Claims

1. A self-locking structure for a food packaging paper box, comprising a self-locking device (1) and a limiting device (2) disposed on the box body (3), characterized in that: The self-locking device (1) is disposed between the box body (3) and the cover plate on the box body (3), and the limiting device (2) is disposed on one side of the cover plate of the box body (3). The self-locking device (1) includes a concave plate (11) and a rectangular plate (16). The concave plate (11) is fixedly connected to the box body (3), and the rectangular plate (16) is fixedly connected to the cover plate of the box body (3). The surface size and shape of the rectangular plate (16) are adapted to the inner wall size and shape of the concave plate (11). One side of the concave plate (11) Two clamping plates (12) are fixedly connected symmetrically on one side. Each of the two clamping plates (12) has a through hole (13) on one side. A positioning rod (14) is fixedly connected to the inner wall of each of the two through holes (13). A connecting block (17) is fixedly connected to one side of the rectangular plate (16). Two L-shaped grooves (18) are symmetrically opened on one side of the connecting block (17). The inner wall of the through hole (13) is slightly larger than the surface of the connecting block (17). The surface of the positioning rod (14) is slidably connected to the inner wall of the L-shaped groove (18).

2. The self-locking structure of a food packaging paper box according to claim 1, characterized in that: The inner walls of the two L-shaped grooves (18) are fixedly connected to limit blocks (19), and the surface of the limit blocks (19) is trapezoidal.

3. The self-locking structure of a food packaging paper box according to claim 1, characterized in that: The connecting block (17) has beveled angles (110) near the inner walls of the two L-shaped grooves (18).

4. The self-locking structure of a food packaging paper box according to claim 1, characterized in that: Two blocks (111) are symmetrically fixed to one side of the rectangular plate (16).

5. The self-locking structure of a food packaging paper box according to claim 1, characterized in that: A reinforcing block (15) is fixedly connected to one side of the concave plate (11), and the reinforcing block (15) is fixedly connected to the box body (3).

6. The self-locking structure of a food packaging paper box according to claim 1, characterized in that: The limiting device (2) includes an intercepting rod (21), which is fixedly connected to the cover plate on the box body (3). A perforated plate (23) is fixedly connected to one side of the intercepting rod (21), and a round shaft (24) is rotatably connected to one side of the box body (3). A positioning block (25) is fixedly connected to one end of the round shaft (24) away from the box body (3). The surface of the round shaft (24) is smaller than the inner wall of the perforated plate (23), and the surface size and shape of the positioning block (25) are adapted to the size and shape of the inner wall of the perforated plate (23).

7. The self-locking structure of a food packaging paper box according to claim 6, characterized in that: A rubber pad (26) is fixedly connected to one side of the perforated plate (23). The inner wall of the rubber pad (26) is larger than the surface of the positioning block (25). The surface of the rubber pad (26) is provided with multiple anti-slip protrusions.

8. The self-locking structure of a food packaging paper box according to claim 6, characterized in that: The surface of the interceptor bar (21) is fixedly connected with a plurality of reinforcing ribs (22), and the plurality of reinforcing ribs (22) are arranged at equal intervals.

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