Packaging box capable of preventing cracking of folding line of swing cover

Abstract

The utility model discloses a packing box capable of preventing cracking of folding lines of a swing cover, which belongs to the technical field of packing boxes and comprises a box body, a transverse folding anti-cracking component and a longitudinal folding anti-cracking component which are used for preventing cracking during closing and folding are connected onto the box body, the transverse folding anti-cracking component is connected with an outer swing cover used for closing the box body, and the longitudinal folding anti-cracking component is connected with a longitudinal folding anti-cracking component. The longitudinal folding anti-cracking assembly is connected with an inner rocking cover used for assisting the transverse folding anti-cracking assembly to seal the box body. According to the mode, two bending lines are formed, so that the shared stress is greatly reduced, and meanwhile, the first trapezoidal supporting block and the second trapezoidal supporting block can form supporting at the bending positions, so that the situation that the bending lines are cracked due to the fact that the outer rocking cover and the inner rocking cover are excessively bent is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of packing boxes, and particularly relates to a packing box for preventing the cracking of the folding line of the swing cover. Background Art

[0002] Packing boxes are usually made of cardboard or other materials, and these materials are prone to brittle fracture or cracking when subjected to pressure or external force. For example, at the folding line between the swing cover and the box body of a packing carton, the folding of the swing cover easily causes cracking at this folding line, and in severe cases, the entire swing cover may even break from the box body.

[0003] Among many existing technologies, Chinese Patent Application CN203780923U discloses a packing box, including: a top cover part, a side plate part and a bottom plate part, the top cover part and the bottom plate part are respectively connected to the side plate part, and further includes a reinforcing plate, the reinforcing plate is folded and laid on the inner side of the bottom plate part, the top cover part has a three-layer structure and realizes the sealing of the packing box by being connected to the side plate part.

[0004] However, this patent application encloses the front side plate, the left side plate, the rear side plate and the right side plate along the folding line, which cannot prevent the cracking of the folding line, and at the same time cannot form a support at the bending part, and excessive bending during use will cause cracking at the folding line.

[0005] Based on this, the utility model designs a packing box for preventing the cracking of the folding line of the swing cover to solve the above problems. Summary of the Utility Model

[0006] Aiming at the above-mentioned disadvantages of the prior art, the utility model provides a packing box for preventing the cracking of the folding line of the swing cover.

[0007] To achieve the above purposes, the utility model is realized through the following technical solutions:

[0008] A packing box for preventing the cracking of the folding line of the swing cover, including a box body, a transverse folding anti-cracking component and a longitudinal folding anti-cracking component for preventing cracking during closing and folding are connected to the box body, the transverse folding anti-cracking component is connected to an outer swing cover for closing the box body, the longitudinal folding anti-cracking component is connected to an inner swing cover for assisting the transverse folding anti-cracking component to close the box body, four groups of the transverse folding anti-cracking component, the longitudinal folding anti-cracking component, the outer swing cover and the inner swing cover are provided, the upper and lower ends of the front and rear side walls of the box body are respectively connected to the outer swing cover through the transverse folding anti-cracking component, the upper and lower ends of the left and right side walls of the box body are respectively connected to the inner swing cover through the longitudinal folding anti-cracking component, the surface of the outer swing cover away from the box body is attached to the surface of the inner swing cover close to the box body, the inner swing cover is connected to the transverse folding anti-cracking component, and the longitudinal folding anti-cracking component is connected to the transverse folding anti-cracking component;

[0009] The lateral folding anti-cracking assembly includes a first folding plate and a first trapezoidal support block. The front and rear side walls of the box body, the first folding plate, and the outer swing cover are integrally formed cardboard. The outer side surface of the first trapezoidal support block is fixedly connected to the inner side surface of the first folding plate;

[0010] The longitudinal folding anti-cracking assembly includes a second folding plate and a second trapezoidal support block. The left and right side walls of the box body, the second folding plate, and the inner swing cover are integrally formed cardboard. The outer side surface of the second trapezoidal support block is fixedly connected to the inner side surface of the second folding plate. The front and rear ends of the inner swing cover and the second folding plate are inclined surfaces that fit the inner side surface of the first trapezoidal support block.

[0011] Furthermore, the upper ends of the left and right side walls of the box body are lower than the upper ends of the front and rear side walls of the box body, and the lower ends of the left and right side walls of the box body are higher than the lower ends of the front and rear side walls of the box body.

[0012] Furthermore, the outer swing cover and the inner swing cover have the same structure, the first folding plate and the second folding plate have the same structure, and the first trapezoidal support block and the second trapezoidal support block have the same structure.

[0013] Furthermore, the cardboard integrally formed by the front and rear side walls of the box body, the first folding plate, and the outer swing cover forms a lateral notch at the inner side surface of the first folding plate for use with the first trapezoidal support block, and the first trapezoidal support block is installed in the notch.

[0014] Furthermore, the side wall of the lateral notch on the outer swing cover is in contact connection with the waist surface of the first trapezoidal support block close to the outer swing cover, and the side wall of the lateral notch on the box body is in contact connection with the waist surface of the first trapezoidal support block far from the outer swing cover.

[0015] Furthermore, the cardboard integrally formed by the left and right side walls of the box body, the second folding plate, and the inner swing cover forms a longitudinal notch at the inner side surface of the second folding plate for use with the second trapezoidal support block, and the second trapezoidal support block is installed in the notch.

[0016] Furthermore, the side wall of the longitudinal notch on the inner swing cover is in contact connection with the waist surface of the second trapezoidal support block close to the inner swing cover, and the side wall of the longitudinal notch on the box body is in contact connection with the waist surface of the second trapezoidal support block far from the inner swing cover.

[0017] Furthermore, between the side wall of the lateral notch on the outer swing cover and the waist surface of the first trapezoidal support block close to the outer swing cover, between the side wall of the lateral notch on the box body and the waist surface of the first trapezoidal support block far from the outer swing cover, between the side wall of the longitudinal notch on the inner swing cover and the waist surface of the second trapezoidal support block close to the inner swing cover, and between the side wall of the longitudinal notch on the box body and the waist surface of the second trapezoidal support block far from the inner swing cover, a 45° angle is formed.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows: 1. The present utility model forms two bending lines, and each bending line only needs to be bent by 45°. Not only the stress borne is greatly reduced, but also the number of times the cardboard can be bent is increased.

[0019] 2. The first trapezoidal support block and the second trapezoidal support block will form supports at the bending places to prevent the outer swing cover and the inner swing cover from being overbent and causing cracks at the folding line. The front and rear ends of the inner swing cover and the second folding plate cooperate with the inner side of the first trapezoidal support block to fit and form a support for the bending place of the outer swing cover, making the structure more stable. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 is a three-dimensional view of a packing box for preventing cracks at the folding line of a swing cover of the present utility model Figure 1 ;

[0022] Figure 2 is a front view of a packing box for preventing cracks at the folding line of a swing cover of the present utility model;

[0023] Figure 3 is a three-dimensional view of a packing box for preventing cracks at the folding line of a swing cover of the present utility model Figure 2 ;

[0024] Figure 4 is a sectional view taken along the A-A direction of Figure 2 ;

[0025] The reference numerals in the drawings respectively represent:

[0026] 1. Box body; 2. Transverse folding anti-cracking assembly; 21. First folding plate; 22. First trapezoidal support block; 3. Longitudinal folding anti-cracking assembly; 31. Second folding plate; 32. Second trapezoidal support block; 4. Outer swing cover; 5. Inner swing cover. Detailed Embodiments

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] In the following description, the "left", "right", "front", "back", "top", and "bottom" mentioned are oriented in the perspective direction of the front view.

[0029] Embodiment 1: In some embodiments, please refer to the Figures 1 - 4 of the accompanying drawings of the specification. A packaging box for preventing cracking of the folding line of the anti-shake cover includes a box body 1. A transverse folding anti-cracking component 2 and a longitudinal folding anti-cracking component 3 for preventing cracking during closing and folding are connected to the box body 1. The transverse folding anti-cracking component 2 is connected to an outer shake cover 4 for closing the box body 1. The longitudinal folding anti-cracking component 3 is connected to an inner shake cover 5 for assisting the transverse folding anti-cracking component 2 to close the box body 1. Four groups of the transverse folding anti-cracking component 2, the longitudinal folding anti-cracking component 3, the outer shake cover 4, and the inner shake cover 5 are provided. The upper and lower ends of the front and rear side walls of the box body 1 are respectively connected to the outer shake cover 4 through the transverse folding anti-cracking component 2. The upper and lower ends of the left and right side walls of the box body 1 are respectively connected to the inner shake cover 5 through the longitudinal folding anti-cracking component 3. The surface of the outer shake cover 4 away from the box body 1 is attached to the surface of the inner shake cover 5 close to the box body 1. The inner shake cover 5 is connected to the transverse folding anti-cracking component 2, and the longitudinal folding anti-cracking component 3 is connected to the transverse folding anti-cracking component 2;

[0030] The transverse folding anti-cracking component 2 includes a first folding plate 21 and a first trapezoidal support block 22. The front and rear side walls of the box body 1, the first folding plate 21, and the outer shake cover 4 are integrally formed paperboards. The outer side surface of the first trapezoidal support block 22 is fixedly connected to the inner side surface of the first folding plate 21;

[0031] The longitudinal folding anti-cracking component 3 includes a second folding plate 31 and a second trapezoidal support block 32. The left and right side walls of the box body 1, the second folding plate 31, and the inner shake cover 5 are integrally formed paperboards. The outer side surface of the second trapezoidal support block 32 is fixedly connected to the inner side surface of the second folding plate 31. The front and rear ends of the inner shake cover 5 and the second folding plate 31 are inclined surfaces that fit the inner side surface of the first trapezoidal support block 22;

[0032] When the utility model is in use, the inner flap 5 is first bent inward, and then the outer flap 4 is bent. When the inner flap 5 and the outer flap 4 are bent, due to the supporting effect of the first trapezoidal support block 22 and the second trapezoidal support block 32, the cardboard will form two folding lines along both ends of the first folding plate 21 and the second folding plate 31, greatly reducing the stress borne by a single folding line. At the same time, when the outer flap 4 and the inner flap 5 are completely flattened, the first trapezoidal support block 22 and the second trapezoidal support block 32 will form supports at the bending positions, thus preventing the outer flap 4 and the inner flap 5 from being excessively bent and causing cracking at the folding line. The front and rear ends of the inner flap 5 and the second folding plate 31 cooperate with the inner side surface of the first trapezoidal support block 22 to fit and support the bending position of the outer flap 4, making the structure more stable.

[0033] The upper ends of the left and right side walls of the box body 1 are lower than the upper ends of the front and rear side walls of the box body 1, and the lower ends of the left and right side walls of the box body 1 are higher than the lower ends of the front and rear side walls of the box body 1;

[0034] The outer flap 4 and the inner flap 5 have the same structure, the first folding plate 21 and the second folding plate 31 have the same structure, and the first trapezoidal support block 22 and the second trapezoidal support block 32 have the same structure;

[0035] The cardboard integrally formed by the front and rear side walls of the box body 1, the first folding plate 21 and the outer flap 4 forms a transverse notch for cooperating with the first trapezoidal support block 22 on the inner side surface of the first folding plate 21, and the first trapezoidal support block 22 is installed in the notch;

[0036] The side wall of the transverse notch on the outer flap 4 is in contact connection with the waist surface of the first trapezoidal support block 22 close to the outer flap 4, and the side wall of the transverse notch on the box body 1 is in contact connection with the waist surface of the first trapezoidal support block 22 far from the outer flap 4;

[0037] The cardboard integrally formed by the left and right side walls of the box body 1, the second folding plate 31 and the inner flap 5 forms a longitudinal notch for cooperating with the second trapezoidal support block 32 on the inner side surface of the second folding plate 31, and the second trapezoidal support block 32 is installed in the notch;

[0038] The side wall of the longitudinal notch on the inner flap 5 is in contact connection with the waist surface of the second trapezoidal support block 32 close to the inner flap 5, and the side wall of the longitudinal notch on the box body 1 is in contact connection with the waist surface of the second trapezoidal support block 32 far from the inner flap 5;

[0039] The transverse notch is located between the side wall of the outer swing cover 4 and the waist surface of the first trapezoidal support block 22 close to the outer swing cover 4, the transverse notch is located between the side wall of the box body 1 and the waist surface of the first trapezoidal support block 22 away from the outer swing cover 4, the longitudinal notch is located between the side wall of the inner swing cover 5 and the waist surface of the second trapezoidal support block 32 close to the inner swing cover 5, and the longitudinal notch is located between the side wall of the box body 1 and the waist surface of the second trapezoidal support block 32 away from the inner swing cover 5, all forming a 45° angle;

[0040] When the present invention is in use, the inner swing cover 5 is first bent inward on the box body 1 and then the outer swing cover 4 is bent inward on the box body 1 to form a carton. The upper ends of the left and right side walls of the box body 1 are lower than the upper ends of the front and rear side walls of the box body 1, and the lower ends of the left and right side walls of the box body 1 are higher than the lower ends of the front and rear side walls of the box body 1, so that the inner swing cover 5 will not cause obstruction when the outer swing cover 4 is bent. When the inner swing cover 5 and the outer swing cover 4 are bent, due to the supporting effect of the first trapezoidal support block 22 and the second trapezoidal support block 32, the cardboard will form two bending lines along the two ends of the second folding plate 31. The horizontal notch is between the side wall on the outer swing cover 4 and the waist surface of the first trapezoidal support block 22 close to the outer swing cover 4, the horizontal notch is between the side wall on the box body 1 and the waist surface of the first trapezoidal support block 22 away from the outer swing cover 4, and the longitudinal notch is between the side wall on the inner swing cover 5 and the waist surface of the second trapezoidal support block 32 close to the inner swing cover 5. The longitudinal notch is located between the side wall of the box body 1 and the waist surface of the second trapezoidal support block 32 away from the inner swing cover 5 side, and a 45° angle is formed. Each fold line only needs to be folded 45°, which not only greatly reduces the stress but also increases the number of bending times of the cardboard. At the same time, when the outer swing cover 4 and the inner swing cover 5 are completely folded, the side wall of the transverse notch on the outer swing cover 4 is in contact with the waist surface of the first trapezoidal support block 22 close to the outer swing cover 4 side, the side wall of the transverse notch on the box body 1 is in contact with the waist surface of the first trapezoidal support block 22 away from the outer swing cover 4 side, the side wall of the longitudinal notch on the inner swing cover 5 is in contact with the waist surface of the second trapezoidal support block 32 close to the inner swing cover 5 side, and the side wall of the longitudinal notch on the box body 1 is in contact with the waist surface of the second trapezoidal support block 32 away from the inner swing cover 5 side, forming a support to avoid excessive bending of the outer swing cover 4 and the inner swing cover 5 causing cracks at the folding line.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A packing box for preventing the folding line of the swing lid from cracking, comprising a box body (1), characterized in that: The box body (1) is connected to a transverse folding anti-cracking component (2) and a longitudinal folding anti-cracking component (3) for preventing cracking when closed and folded; the transverse folding anti-cracking component (2) is connected to an outer swing cover (4) for closing the box body (1); the longitudinal folding anti-cracking component (3) is connected to an inner swing cover (5) for assisting the transverse folding anti-cracking component (2) in closing the box body (1); the transverse folding anti-cracking component (2), the longitudinal folding anti-cracking component (3), the outer swing cover (4) and the inner swing cover (5) are all provided with There are four groups, the upper and lower ends of the front and rear side walls of the box body (1) are respectively connected to the outer swing cover (4) through the transverse folding anti-cracking component (2), the upper and lower ends of the left and right side walls of the box body (1) are respectively connected to the inner swing cover (5) through the longitudinal folding anti-cracking component (3), the surface of the outer swing cover (4) away from the box body (1) is in contact with the surface of the inner swing cover (5) close to the box body (1), the inner swing cover (5) is connected to the transverse folding anti-cracking component (2), and the longitudinal folding anti-cracking component (3) is connected to the transverse folding anti-cracking component (2); The transverse folding anti-cracking assembly (2) comprises a first folding plate (21) and a first trapezoidal support block (22); the front and rear side walls of the box body (1), the first folding plate (21) and the outer swing cover (4) are integrally formed cardboard; the outer side surface of the first trapezoidal support block (22) is fixedly connected to the inner side surface of the first folding plate (21); The longitudinal folding anti-cracking component (3) comprises a second folding plate (31) and a second trapezoidal support block (32); the left and right side walls of the box body (1), the second folding plate (31) and the inner swing cover (5) are integrally formed cardboard; the outer side surface of the second trapezoidal support block (32) is fixedly connected to the inner side surface of the second folding plate (31); the front and rear ends of the inner swing cover (5) and the second folding plate (31) are inclined surfaces that fit the inner side surface of the first trapezoidal support block (22).

2. The packaging box for preventing the folding line of the swing lid from cracking according to claim 1, wherein, The upper ends of the left and right side walls of the box body (1) are lower than the upper ends of the front and rear side walls of the box body (1), and the lower ends of the left and right side walls of the box body (1) are higher than the lower ends of the front and rear side walls of the box body (1).

3. The packing box for preventing cracking of the folding line of the anti-shake cover according to claim 2, characterized in that, The outer swing cover (4) and the inner swing cover (5) have the same structure, the first folding plate (21) and the second folding plate (31) have the same structure, and the first trapezoidal support block (22) and the second trapezoidal support block (32) have the same structure.

4. The packing box for preventing the folding line of the swing cover from cracking according to claim 3, wherein, The front and rear side walls of the box body (1), the first folding plate (21) and the outer flap (4) are integrally formed with a cardboard. A transverse notch is formed on the inner side of the first folding plate (21) for use with the first trapezoidal support block (22), and the first trapezoidal support block (22) is installed in the notch.

5. The packaging box for preventing the cracking of the folding line of the anti-shake cover according to claim 4, characterized in that, The side wall of the transverse notch on the outer swing cover (4) is in contact with the waist surface of the first trapezoidal support block (22) on the side close to the outer swing cover (4), and the side wall of the transverse notch on the box body (1) is in contact with the waist surface of the first trapezoidal support block (22) on the side away from the outer swing cover (4).

6. The packaging box for preventing the folding line of the swing lid from cracking according to claim 5, wherein The cardboard formed integrally with the left and right side walls of the box body (1), the second folding plate (31) and the inner swing cover (5) forms a longitudinal notch at the inner side surface of the second folding plate (31) for use in cooperation with the second trapezoidal support block (32), and the second trapezoidal support block (32) is installed in the notch.

7. The packaging box for preventing cracking of the folding line of the anti-sway cover according to claim 6, wherein, The side wall of the longitudinal notch on the inner swing cover (5) is in contact connection with the waist surface of the second trapezoidal support block (32) on the side close to the inner swing cover (5), and the side wall of the longitudinal notch on the box body (1) is in contact connection with the waist surface of the second trapezoidal support block (32) on the side far from the inner swing cover (5).

8. The packaging box for preventing the folding line of the swing cover from cracking according to claim 7, wherein, An included angle of 45° is formed between the side wall of the transverse notch on the outer swing cover (4) and the waist surface of the first trapezoidal support block (22) on the side close to the outer swing cover (4), between the side wall of the transverse notch on the box body (1) and the waist surface of the first trapezoidal support block (22) on the side far from the outer swing cover (4), between the side wall of the longitudinal notch on the inner swing cover (5) and the waist surface of the second trapezoidal support block (32) on the side close to the inner swing cover (5), and between the side wall of the longitudinal notch on the box body (1) and the waist surface of the second trapezoidal support block (32) on the side far from the inner swing cover (5).

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