Box cover closing linkage type self-locking paper box

Abstract

The utility model relates to a paper box, in particular to a box cover closing linkage type self-locking paper box. Comprising a box body, a swing cover and an insertion tongue, the top of the box body is connected with the swing cover, the tail end of the swing cover is provided with the insertion tongue, the top of a front side plate of the box body is connected with a first connecting piece extending forwards and downwards, the lower end of the first connecting piece is connected with a second connecting piece extending forwards and upwards, and crease lines are formed between the two ends of the first connecting piece and the second connecting piece and between the two ends of the first connecting piece and the box body. Triangular pieces which are turned backwards by 90 degrees and fixed to the side plates of the box body are symmetrically arranged on the two sides of the second connecting piece, an inserting gap is formed between the second connecting piece and the front side plate of the box body, and a convex notch is formed in the middle of the inserting tongue. Through the unique design of the first connecting piece, the second connecting piece and the locking piece, the paper box has higher stability and safety in the closed state, and the self-locking performance of the paper box is enhanced through the design.

Description

TECHNICAL FIELD

[0001] The utility model relates to a paper box especially relates to a box cover closing linkage type self -locking paper box. BACKGROUND

[0002] As a common packaging material, paper boxes have been widely used in the field of commodity packaging due to their low cost, easy processing and molding, environmental protection and recycling advantages. Traditional paper box design is mainly simple structure, as shown in the drawings, including a main box body and a top swing cover, which is closed by the plug on the swing cover and the corresponding plug-in structure on the box body. This design can meet the basic packaging requirements to a certain extent, such as protecting products from the influence of the external environment, facilitating transportation and storage. However, with the increasing demand for packaging functionality and user experience, the limitations of traditional paper boxes have gradually emerged. Figure 1

[0003] The existing paper box usually lacks the function of automatically locking after the swing cover is closed, resulting in insecure closure, easy opening under the influence of transportation, and insufficient safety and stability. The self-locking effect of the traditional design is weakened after being opened and closed for many times, increasing the risk of damage to the goods. INVENTION CONTENTS

[0004] In order to overcome the shortcomings of the existing paper box, which usually lacks the function of automatically locking after the swing cover is closed, resulting in insecure closure, easy opening under the influence of transportation, and insufficient safety and stability, the technical problem to be solved is to provide a box cover closing linkage type self-locking paper box.

[0005] The technical scheme of the utility model is: a box cover closing linkage type self-locking paper box, comprising a box body, a swing cover and a plug, the box body top is connected with the swing cover, the swing cover end is provided with the plug, the box body front side plate top is connected with the first connecting piece extending to the front and down, the first connecting piece lower end is connected with the second connecting piece extending to the front and up, the first connecting piece both ends and the second connecting piece and the box body between all form crease lines, the second connecting piece both sides are symmetrically provided with the triangular piece which is turned back 90 degrees and fixed to the box body side plate, the second connecting piece and the box body front side plate form the plug-in gap, the plug middle part is provided with the convex notch, the convex notch both sides are provided with the locking part extending to the middle part;The first connecting piece is provided with a cut groove, and the cut groove is provided with an elastically deformable locking piece;The second connecting piece is provided with an unlocking hole corresponding to the locking piece, and the locking piece is embedded in the unlocking hole to form a locking state.

[0006] In one embodiment, the width of the locking piece decreases linearly from the connection end of the box body front side plate to the middle part, and remains the same from the middle part to the free end.

[0007] In one embodiment, the cut groove and the locking piece are consistent in shape.

[0008] ​In one of the embodiments, the locking portion is partially overlapped with the wider part of the upper portion of the locking piece when the hinged cover is closed and the plug is inserted into the insertion gap.

[0009] In one of the embodiments, the width of the insertion gap is 1.2-1.5 times the thickness of the plug.

[0010] In one of the embodiments, the box body, the hinged cover, the first connecting piece, the second connecting piece, the triangular piece and the locking piece are integrally die-cut and formed by using a single corrugated paperboard.

[0011] In one of the embodiments, the top edge of the triangular piece is provided with an arc-shaped opening.

[0012] The beneficial effects are: the unique first connecting piece, the second connecting piece and the locking piece design make the paper box have stronger stability and safety in the closed state. The design not only enhances the self-locking performance of the paper box, but also ensures that it can still maintain a good closed state even after being opened and closed for many times, effectively improving the overall quality and functionality of the paper box. In addition, the integrally die-cut and formed process is used for manufacturing, which not only reduces the production cost, but also improves the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a planar structure schematic diagram of the prior art paper box.

[0014] Figure 2 It is a planar unfolded structure schematic diagram of the embodiment of the utility model.

[0015] Figure 3 It is a three-dimensional structure schematic diagram of the utility model in the closed state of the hinged cover.

[0016] Figure 4 It is a three-dimensional structure schematic diagram of the utility model in the unfolded state of the hinged cover.

[0017] Figure 5 It is a three-dimensional schematic diagram of the cooperation state of the locking piece and the locking portion of the utility model.

[0018] In the drawing marks: 1-box body, 2-hinged cover, 3-plug, 301-convex notch, 302-locking portion, 4-first connecting piece, 401-cutting groove, 402-locking piece, 5-second connecting piece, 501-unlocking hole, 6-triangular piece, 601-arc-shaped opening. DETAILED DESCRIPTION

[0019] The embodiments of the utility model will be described in detail below with reference to the drawings.

[0020] A box cover closed linkage type self-locking paper box, such as Figures 2-5As shown, it comprises a box body 1, a shake cover 2 and a plug 3, the top of the box body 1 is connected with the shake cover 2, the end of the shake cover 2 is provided with the plug 3, the top of the front side plate of the box body 1 is connected with a first connecting piece 4 extending to the front and downward, the rear side of the first connecting piece 4 is bonded with the front side of the box body 1, the lower end of the first connecting piece 4 is connected with a second connecting piece 5 extending to the front and upward, the both ends of the first connecting piece 4 are respectively formed with a crease line between the second connecting piece 5 and the box body 1, the both sides of the second connecting piece 5 are symmetrically provided with triangular pieces 6 which are reversely turned by 90 degrees and connected with the side plates of the box body 1 by bonding, the top edge of the triangular piece 6 is provided with an arc-shaped opening 601, when the shake cover 2 covers the top of the box body 1, the finger placed at the arc-shaped opening 601 can facilitate opening the shake cover 2, the second connecting piece 5 and the front side plate of the box body 1 form a plug-in gap, the width of the plug-in gap is 1.4 times the thickness of the plug 3, the middle of the plug 3 is provided with a convex notch 301, the both sides of the convex notch 301 are provided with locking portions 302 extending to the middle, the locking portions 302 are rectangular; the both sides of the upper part of the first connecting piece 4 are provided with cut grooves 401, the cut grooves 401 are respectively provided with elastic locking pieces 402, the shapes of the cut grooves 401 and the locking pieces 402 are consistent; the both sides of the second connecting piece 5 are respectively provided with unlocking holes 501 corresponding to the locking pieces 402, the shapes of the unlocking holes 501 are square, the locking pieces 402 are embedded in the unlocking holes 501 to form a locking state, the box body 1, the shake cover 2, the first connecting piece 4, the second connecting piece 5, the triangular piece 6 and the locking piece 402 are integrally die-cut from single corrugated paperboard, which not only reduces the production cost, but also improves the production efficiency.

[0021] As shown in Figure 5 The width of the locking piece 402 linearly decreases from the connecting end to the middle of the front side plate of the box body 1, and remains constant from the middle to the free end, when the shake cover 2 is closed and the plug 3 is inserted into the plug-in gap, the locking portions 302 partially coincide with the upper part of the wider locking piece 402.

[0022] In the initial state, the self-locking paper box is open, and the lower part of the locking piece 402 on both sides is embedded in the unlocking hole 501. When the shake cover 2 is placed on the top of the box body 1, and the plug 3 is inserted into the plug-in gap, the locking portions 302 on both sides will contact the upper end of the locking piece 402. As the plug 3 continues to move downward, it will push the locking piece 402 to move to the inside of the cut groove 401. Since the width of the locking piece 402 gradually decreases from the connecting end to the middle of the front side plate of the box body 1, and remains constant from the middle to the free end, the locking piece 402 will be separated from the locking portion 302 at a certain position and no longer be extruded. At this time, the locking piece 402 relies on the crease between the locking piece 402 and the first connecting piece 4 to elastically recover to the original position, so that the lower part of the locking piece 402 is embedded in the unlocking hole 501 again, forming a self-locking structure. At this time, the plug 3 is limited in the plug-in gap and cannot be bent forward, and the locking portion 302 is located between the first connecting piece 4 and the locking piece 402.

[0023] If the rocker cover 2 is attempted to be opened upward, the locking portion 302 will move upward to the rear of the wider portion of the lock piece 402. Due to the design of the lock piece 402 being wider at the top and narrower at the bottom, and the space limitation of the plug-in gap, the lock piece 402 can be effectively prevented from being flipped upward and forward, thereby avoiding the possibility of directly opening the rocker cover 2. When it is necessary to reopen the rocker cover 2, the lock piece 402 in the unlocking hole 501 can be pressed backward at the same time to unlock. In this process, because the locking portion 302 is located at the lower side of the lock piece 402, it will not hinder the lock piece 402 from retracting into the cutting groove 401, and at the same time, the rocker cover 2 is opened by the arc-shaped opening 601, so that the plug-in gap is separated from the plug 3, and the rocker cover 2 is fully opened.

[0024] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A self-locking paper box with lid closing linkage, comprising a box body, a swing lid and a plug, the swing lid is connected to the top of the box body, and the plug is arranged at the end of the swing lid, characterized in that: The top of the front side plate of the box body is connected with a first connecting piece extending downward and forward, the lower end of the first connecting piece is connected with a second connecting piece extending upward and forward, the two ends of the first connecting piece are respectively connected with the second connecting piece and the box body, and a crease line is formed between the two ends, the two sides of the second connecting piece are symmetrically provided with triangular pieces which are turned back by 90 degrees and fixed to the side plates of the box body, an insertion gap is formed between the second connecting piece and the front side plate of the box body, the middle part of the plug is provided with a convex notch, the two sides of the convex notch are provided with locking parts extending to the middle part, the first connecting piece is provided with a cutting groove, the cutting groove is provided with an elastically deformable locking piece, the second connecting piece is provided with an unlocking hole corresponding to the locking piece, and the locking piece is embedded in the unlocking hole to form a locking state.

2. A box cover closing linkage self-locking paper box according to claim 1, characterized in that: The width of the locking piece linearly decreases from the connecting end of the front side plate of the box body to the middle part, and remains the same from the middle part to the free end.

3. A box cover closing linkage self-locking paper box according to claim 2, characterized in that: The cutting groove and the locking piece are consistent in shape.

4. A box cover closing linkage self-locking paper box according to claim 3, characterized in that: When the rocking cover is closed and the plug is inserted into the insertion gap, the locking part partially overlaps with the upper part of the locking piece which is wider.

5. A box cover closing linkage self-locking paper box according to claim 1, characterized in that: The width of the insertion gap is 1.2-1.5 times the thickness of the plug.

6. A box cover closure interlocking self-locking paper box according to claim 1, characterized in that: The box body, the rocking cover, the first connecting piece, the second connecting piece, the triangular pieces and the locking piece are integrally die-cut from a single corrugated paperboard.

7. A box cover closing linkage self-locking paper box according to claim 1, characterized in that: The top edge of the triangular piece is provided with an arc-shaped opening.

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