Anti-misopening packaging box

Abstract

This disclosure belongs to the field of packaging technology, and specifically relates to an anti-accidental opening packaging box. The anti-accidental opening packaging box of this disclosure includes a box body and a box lid. The box body has a narrow, elongated slot and a stop piece extending along the width direction of the slot. The box lid has a locking piece provided in a tear-resistant manner via a tear line. The locking piece has an inclined limiting portion pointing from a free end to a fixed end. The locking piece is configured to insert into the narrow, elongated slot when subjected to force, and the inclined limiting portion pushes the stop piece to bend until the inclined limiting portion passes through the narrow, elongated slot. Afterward, the stop piece returns to its original position, with the inclined limiting portion limiting the displacement of the locking piece along the direction of disengagement from the narrow, elongated slot. Thus, with this anti-accidental opening packaging box, when closing, simply inserting the locking piece into the narrow, elongated slot easily locks the box body and lid, preventing accidental opening. When opening the packaging box, the short tear line between the locking piece and the box lid reduces the difficulty of tearing and makes it less likely to break.

Description

Technical Field

[0001] This disclosure belongs to the field of packaging technology, and specifically relates to a packaging box that prevents accidental opening. Background Technology

[0002] Packaging boxes are typically designed with regular shapes and reasonable sizes, allowing them to be stacked to save storage space. They are highly practical and flexible, and easy to open, such as packaging boxes with flip-tops or zipper closures.

[0003] Existing packaging boxes typically have interlocking protrusions and grooves or tearable disposable zippers on the box body and lid. The precision of their fit depends on the precision during processing. If there are minor errors in the production process, it may cause batch products to have problems such as being "too tight to open or tear" or "too loose to detach or crack". Utility Model Content

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a packaging box that prevents accidental opening.

[0005] This disclosure provides a mis-openable packaging box, the mis-openable packaging box comprising:

[0006] The box body has a narrow, elongated slot and a stop piece extending along the width direction of the narrow, elongated slot.

[0007] A box lid, wherein a locking piece is provided on the box lid in a tearable manner via a tear line, and the locking piece has an inclined limiting part pointing from a free end to a fixed end;

[0008] The locking piece is configured to insert into the narrow slot after being subjected to force, and the stop piece is pushed to bend by the inclined limiting part until the inclined limiting part passes through the narrow slot. After that, the stop piece is reset to limit the displacement of the locking piece in the direction of disengaging from the narrow slot by the inclined limiting part.

[0009] In one embodiment of this disclosure, a preset gap is formed between the stop piece and the elongated slot, and the free end of the locking piece is inserted into the elongated slot through the preset gap.

[0010] In one embodiment of this disclosure, the stop piece is a trapezoidal stop piece.

[0011] In one embodiment of this disclosure, the box body has a first fitting surface, the box lid has a second fitting surface, and the first fitting surface and the second fitting surface abut against each other when the box body and the box lid are closed, and the tear line of the locking piece is coplanar with the second fitting surface;

[0012] The box body has a recessed groove on the first mating surface, and the elongated slot is opened at the bottom of the recessed groove. The first distance between the tear line and the mating surface of the inclined limiting part that mates with the stop piece is equal to or greater than the second distance between the first mating surface and the bottom of the recessed groove.

[0013] In one embodiment of this disclosure, the opening of the settling tank is larger than the bottom of the tank, and the cross-sectional area of ​​the settling tank decreases in the direction from the opening to the bottom of the tank.

[0014] In one embodiment of this disclosure, the locking piece has side wings extending outward from both sides, and the side wings are configured to limit the displacement of the locking piece along a direction perpendicular to the insertion direction of the locking piece after the stop piece is reset.

[0015] In one embodiment of this disclosure, the inclined limiting part is a wedge-shaped block, the large end of the wedge-shaped block is close to the tear line, the small end is close to the free end of the locking piece, and there is a first preset distance between the wedge-shaped block and the free end of the locking piece.

[0016] In one embodiment of this disclosure, the inclined limiting portion is a plurality of wedge-shaped blocks arranged at intervals along a direction perpendicular to the insertion direction of the locking piece.

[0017] In one embodiment of this disclosure, the lid further has an opening tab configured to pull the lid under external force after the locking tab is separated from the box body by a tear line.

[0018] In one embodiment of this disclosure, the box body has two opening tabs, which are respectively disposed on both sides of the locking tab, and the opening tabs near the locking tab are smooth curved surfaces extending from the tear line away from the locking tab.

[0019] In one embodiment of this disclosure, the force-bearing surface of the box opener is provided with a plurality of anti-slip protrusions.

[0020] In one embodiment of this disclosure, the box body has a first contact surface, the box lid has a second contact surface, and the first contact surface and the second contact surface abut against each other when the box body and the box lid are closed.

[0021] The first mating surface has a raised sealing ring, and the second mating surface has a sealing groove, with the sealing ring embedded in the sealing groove.

[0022] One of the beneficial effects of this disclosure is that the anti-accidental opening packaging box of this disclosure has a narrow strip groove in the box body and a stop piece in the narrow strip groove. A tearable locking piece with an inclined limiting part is provided on the box lid through a tear line. When the packaging box is closed, the locking piece is forced into the narrow strip groove, and at the same time, the inclined limiting part pushes the stop piece to bend until the inclined limiting part passes through the narrow strip groove. At this time, the stop piece returns to its original position, and the inclined limiting part cooperates to prevent the locking piece from disengaging from the narrow strip groove, so that the box lid and the box body are closed. When the packaging box is opened, the locking piece is separated from the box lid through the tear line, so that the box lid can be opened.

[0023] Thus, the anti-accidental opening packaging box disclosed herein can be easily locked by simply inserting the locking piece into the narrow slot when closing, thus preventing accidental opening. When opening the packaging box, the short tear line between the locking piece and the lid reduces the difficulty for the user to tear it open, making it less likely to break. Attached Figure Description

[0024] Embodiments of this disclosure are illustrated in conjunction with the accompanying drawings, which are included and form part of this specification, and together with their description serve to explain the principles of this disclosure.

[0025] Figure 1 This is a three-dimensional structural diagram of the opened state of a packaging box provided in an embodiment of the present disclosure to prevent accidental opening;

[0026] Figure 2 This is a three-dimensional structural diagram of the closed state of a packaging box provided in an embodiment of the present disclosure to prevent accidental opening;

[0027] Figure 3 This is a cross-sectional structural diagram of the closed state of a packaging box designed to prevent accidental opening, according to an embodiment of this disclosure.

[0028] Figure 4 This is a partially enlarged schematic diagram of the locking piece in the open state of a packaging box designed to prevent accidental opening, according to an embodiment of this disclosure.

[0029] Figure 5 This is a partially enlarged schematic diagram of the sink in the open state of the anti-accidental opening packaging box provided in an embodiment of this disclosure.

[0030] Figures 1 to 5 The correspondence between the component names and the reference numerals in the figures is as follows:

[0031] 1. Box body, 11. Settling groove, 111. Narrow strip groove, 112. Stop plate, 12. Sealing ring;

[0032] 2. Box lid, 21. Tear line, 22. Locking piece, 221. Tilt limit part, 222. Side wing, 23. Box opening piece, 24. Sealing groove. Detailed Implementation

[0033] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0034] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0035] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0036] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0038] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0039] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0040] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0041] Packaging boxes are typically designed with regular shapes and reasonable sizes, allowing them to be stacked to save storage space. They are highly practical and flexible, and easy to open, such as packaging boxes with flip-tops or zipper closures.

[0042] Existing packaging boxes typically have interlocking protrusions and grooves or tearable disposable zippers on the box body and lid. The precision of their fit depends on the precision during processing. If there are minor errors in the production process, it may cause batch products to have problems such as being "too tight to open or tear" or "too loose to detach or crack".

[0043] To address this, the present disclosure provides an anti-accidental opening packaging box, comprising a box body and a box lid. The box body has an elongated slot and a stop piece extending along the width direction of the elongated slot. The box lid has a locking piece provided in a tearable manner via a tear line. The locking piece has an inclined limiting portion pointing from a free end to a fixed end. The locking piece is configured to insert into the elongated slot when subjected to force, and the inclined limiting portion pushes the stop piece to bend until the inclined limiting portion passes through the elongated slot. After that, the stop piece returns to its original position, where the displacement of the locking piece along the direction of disengagement from the elongated slot is limited by the inclined limiting portion.

[0044] The disclosed anti-accidental opening packaging box has a narrow, elongated slot in the box body with a stop piece in the slot, and a tearable locking piece with an inclined limiting part on the lid via a tear line. When the packaging box is closed, the locking piece is forced into the narrow, elongated slot, and the inclined limiting part pushes the stop piece to bend until the inclined limiting part passes through the narrow, elongated slot. At this point, the stop piece returns to its original position, and the inclined limiting part helps prevent the locking piece from disengaging from the narrow, elongated slot, thus allowing the lid to close with the box body. When the packaging box is opened, the locking piece is separated from the lid via the tear line, allowing the lid to be opened.

[0045] Thus, the anti-accidental opening packaging box disclosed herein can be easily locked by simply inserting the locking piece into the narrow slot when closing, thus preventing accidental opening. When opening the packaging box, the short tear line between the locking piece and the lid reduces the difficulty for the user to tear it open, making it less likely to break.

[0046] For ease of understanding, please refer to the following: Figures 1 to 5 The specific structure and working principle of the anti-accidental opening packaging box provided in this disclosure will be described in detail with reference to the embodiments.

[0047] In one embodiment, this disclosure provides an anti-accidental opening packaging box, including a box body 1 and a box lid 2. The box body 1 has an elongated slot 111 and a stop piece 112 extending along the width direction of the elongated slot 111. The box lid 2 is provided with a locking piece 22 in a tearable manner through a tear line 21. The locking piece 22 has an inclined limiting portion 221 pointing from a free end to a fixed end. The locking piece 22 is configured to be inserted into the elongated slot 111 after being subjected to force, and the inclined limiting portion 221 pushes the stop piece 112 to bend until the inclined limiting portion 221 passes through the elongated slot 111. After that, the stop piece 112 returns to its original position, and the displacement of the locking piece 22 along the direction away from the elongated slot 111 is limited by the inclined limiting portion 221.

[0048] In detail, the anti-accidental opening packaging box disclosed herein is square, and the box body 1 and the box cover 2 are rotatably connected by a connector. On the other side opposite to the connector, a narrow strip groove 111 is opened on the box body 1 and a stop piece 112 is provided in the narrow strip groove 111. A tearable locking piece 22 with an inclined limiting part 221 is provided on the box cover 2 through a tear line 21.

[0049] Furthermore, the anti-accidental opening packaging box of this disclosure is a blister box, a plastic box-shaped packaging product produced by blister forming (vacuum forming). Its characteristic is that a flat plastic sheet can be heated and softened, then vacuum-adhered to the surface of a mold, and cooled to form the desired shape. This process is simple, suitable for mass production, and requires no additional cushioning material. Based on this, the box body 1 and the box lid 2 of this disclosure can be integrally formed, directly forming a locking piece 22 with an inclined limiting part 221 and a narrow strip groove 111 with a stop piece 112. This disclosure does not impose any limitations on this aspect.

[0050] When the anti-accidental opening packaging box of this disclosure is closed, the locking piece 22 is controlled to be inserted into the narrow strip groove 111 under force, and at the same time, the tilting limiting part 221 pushes the stop piece 112 until the tilting limiting part 221 passes through the narrow strip groove 111. At this time, the stop piece 112 is reset and the displacement of the tilting limiting part 221 in the direction of disengaging from the narrow strip groove 111 is restricted, thereby preventing the locking piece 22 from disengaging from the narrow strip groove 111, so that the box cover 2 is closed with the box body 1. When the anti-accidental opening packaging box of this disclosure is opened, the locking piece 22 is torn off through the tear line 21 between the locking piece 22 and the box cover 2, thereby separating the locking piece 22 from the box cover 2, so that the box cover 2 can be opened.

[0051] Thus, the anti-accidental opening packaging box disclosed herein can easily lock the box body 1 and the lid 2 by simply inserting the locking piece 22 into the narrow slot 111 when closing, preventing accidental opening. Moreover, the anti-accidental opening packaging box disclosed herein has low processing precision requirements. When opening the packaging box, since the tear line 21 between the locking piece 22 and the lid 2 is short, it is not easy to tear and reduces the difficulty for users to tear.

[0052] Furthermore, the tilting limit part 221 is provided on the side of the locking piece 22 away from the stop piece 112 when the anti-accidental opening packaging box is closed. In this way, when the structural strength of the stop piece 112 decreases after bending, the tilting limit part 221 provided on the other side of the locking piece 22 will not contact the stop piece 112 and apply pressure, so that the locking piece 22 may disengage from the narrow slot 111, and the locking of the anti-accidental opening packaging box is unstable.

[0053] See Figure 2 and Figure 5In one embodiment of this disclosure, a preset gap is formed between the stop plate 112 and the elongated slot 111, and the free end of the locking plate 22 is inserted into the elongated slot 111 through the gap.

[0054] In detail, a preset gap is formed between the stop plate 112 and the elongated slot 111, allowing the free end of the locking piece 22 to be inserted. This allows the locking piece 22 to be inserted into the elongated slot 111, so that the lid 2 and the box body 1 are closed. Furthermore, the inclined limiting part 221 provided on the locking piece 22 is also inserted into the preset gap, thereby gradually pushing the stop plate 112 open until it passes through the preset gap. At this time, the fixed end of the locking piece 22 is still inserted in the preset gap. Afterward, the stop plate 112 returns to its original position, and the inclined limiting part 221 is restricted from disengaging from the elongated slot 111, thereby locking the box body 1 and the lid 2.

[0055] See Figure 1 and Figure 5 In one embodiment of this disclosure, the stop piece 112 is a trapezoidal stop piece.

[0056] In this way, the stop plate 112 is set as a trapezoid, and the bottom edge of the trapezoid is fixed on the side of the narrow strip groove 111, while the other three edges are freely arranged, so that it can be pushed and bent under the action of the inclined limiting part 221. After that, the trapezoidal stop plate 112 is reset, limiting the displacement of the inclined limiting part 221 on the locking plate 22.

[0057] Meanwhile, since the stop plate 112 is trapezoidal, it avoids the apex of the free end of other shaped stop plates 112 from colliding with the edge of the narrow slot 111 and causing obstruction when bending under uneven force. At the same time, the upper bottom edge of the stop plate 112 is long enough to provide sufficient resistance for the tilting limiting part 221, making the locking between the box body 1 and the box lid 2 more stable. Furthermore, the stop plate 112 can be designed as an isosceles trapezoid, which distributes the force more evenly, but this disclosure does not impose any limitations.

[0058] See Figure 1 and Figure 3 In one embodiment, the box body 1 of this disclosure has a first fitting surface and the box cover 2 has a second fitting surface. When the box body 1 and the box cover 2 are closed, the first fitting surface and the second fitting surface abut against each other, and the tear line 21 of the locking piece 22 is coplanar with the second fitting surface. The box body 1 has a recess 11 provided on the first fitting surface, and a narrow strip groove 111 is opened at the bottom of the recess 11. The first distance between the tear line 21 and the mating surface on the inclined limiting part 221 that cooperates with the stop piece 112 is equal to or greater than the second distance between the first fitting surface and the bottom of the recess 11.

[0059] In detail, the box body 1 has a first mating surface and the box lid 2 has a second mating surface. When the box body 1 and the box lid 2 are closed, the first mating surface and the second mating surface abut against each other, which improves the sealing performance of the anti-accidental opening packaging box of this disclosure. The cooperation of the first mating surface and the second mating surface enhances the structural strength of the anti-accidental opening packaging box, making the box body 1 and the box lid 2 fit stably.

[0060] Furthermore, combined Figure 1 An annular stop is also provided on the outer edge of the first mating surface of the box body 1. When the lid 2 is closed, it provides guidance for the lid 2, preventing the first mating surface and the second mating surface between the lid 2 and the box body 1 from shifting, thus improving the stability of the closure of the anti-accidental opening packaging box.

[0061] Meanwhile, the tear line 21 of the locking piece 22 is coplanar with the second mating surface, so that when the box body 1 and the box lid 2 are closed, there is no gap between the locking piece 22 and the first mating surface of the box body 1, thus it can be stably inserted into the narrow slot 111. The tear line 21 will not be torn due to the existence of gaps when external force is applied to the locking piece 22, causing the locking piece 22 to fail to prevent accidental opening of the packaging box.

[0062] Furthermore, the box body 1 has a recessed groove 11 provided on the first mating surface, and a narrow strip groove 111 is opened at the bottom of the recessed groove 11. In this way, the recessed groove 11 can provide protection for the locking piece 22, prevent the locking piece 22 from being subjected to external force perpendicular to the surface of the locking piece 22 when it is inserted into the narrow strip groove 111, and reduce the influence of the outside on the locking piece 22, thereby preventing the tear line 21 from cracking.

[0063] Furthermore, combined Figure 3 In this disclosure, the first distance between the tear line 21 and the mating surface of the inclined limiting part 221 that mates with the stop piece 112 is equal to the second distance between the first mating surface and the bottom of the groove 11. In this way, the inclined limiting part 221 can completely pass through the narrow strip groove 111 without pulling on the tear line 21 and the stop piece 112, thus not affecting the stability of the closed state of the anti-accidental opening packaging box, and ensuring that the first mating surface and the second mating surface fit together perfectly.

[0064] Furthermore, to avoid insufficient processing precision, the first distance between the tear line 21 and the mating surface of the inclined limiting part 221 that mates with the stop piece 112 is greater than the second distance between the first mating surface and the bottom of the groove 11. In this way, the inclined limiting part 221 can completely pass through the narrow strip groove 111 with a certain margin, reducing manufacturing costs and ensuring the stability of locking.

[0065] See Figure 1 and Figure 5In one embodiment of this disclosure, the opening of the settling tank 11 is larger than the bottom of the tank, and the cross-sectional area of ​​the settling tank 11 decreases in the direction from the opening to the bottom of the tank.

[0066] In detail, the cross-sectional area of ​​the recess 11 of this disclosure decreases in the direction from the opening to the bottom of the recess, thus forming an inclined guide surface between the opening and the bottom of the recess. The larger opening makes it easier for the user to position the locking piece 22 into the recess 11. Then, under the action of the guide surface, the locking piece 22 can be inserted into the narrow strip opening 111 at the bottom of the recess to lock the packaging box to prevent accidental opening.

[0067] See Figure 1 and Figure 4 In one embodiment of this disclosure, the locking piece 22 has side wings 222 extending outward from both sides, and the side wings 222 are configured to limit the displacement of the locking piece 22 along a direction perpendicular to the insertion direction of the locking piece 22 after the stop piece 112 is reset.

[0068] Specifically, the side wing 222 of this disclosure extends outward from both sides through the middle of the locking piece 22 to form a square, and then extends along a diagonal line from the fixed end to the free end to the free end of the locking piece 22. At the same time, the side wing 222 is connected to the locking piece 22 by a smooth curve and is provided with rounded corners. Furthermore, the width of the locking piece 22 is less than the width of the narrow strip groove 111, the distance between the two side wings 222 is greater than the width of the narrow strip groove 111, and the distance between the side wing 222 and the tear line 21 is equal to or less than the distance between the inclined limiting part 221 and the tear line 21.

[0069] With this configuration, when the locking piece 22 is inserted into the narrow slot 111, the free end of the locking piece 22 can be inserted into the narrow slot 111. Then, under the action of external force, the inclined limiting part 221 pushes the stop piece 112 to bend, thereby increasing the width of the narrow slot 111. The side wing 222 has enough space to pass through the narrow slot 111 and gradually bends under the compression of the narrow slot 111. Then, both the side wing 222 and the inclined limiting part 221 can pass through the narrow slot 111. At this time, the side wing 222 and the stop piece 112 are reset, limiting the displacement of the locking piece 22 along the direction perpendicular to the insertion direction of the locking piece 22.

[0070] See Figure 1 and Figure 4 In one embodiment of this disclosure, the inclined limiting part 221 is a wedge-shaped block, with the large end of the wedge-shaped block close to the tear line 21 and the small end close to the free end of the locking piece 22, and there is a first preset distance between the wedge-shaped block and the free end of the locking piece 22.

[0071] In detail, the inclined limiting part 221 is a wedge-shaped block with a square bottom surface. The inclined surface of the wedge-shaped block has a guiding function. When the locking piece 22 is inserted, it will naturally correct its position along the inclined surface, reducing jamming caused by deviation. Its large end is close to the tear line 21, and its small end is close to the free end of the locking piece 22. Thus, when the locking piece 22 is inserted into the narrow slot 111, the small end is also inserted into the narrow slot 111 as the locking piece 22 is displaced. Through the squeezing action of the inclined surface of the wedge-shaped block, the stop piece 112 is pushed to bend. After that, the wedge-shaped block completely passes through the narrow slot 111, the stop piece 112 is reset, and the large end of the wedge-shaped block engages with the narrow slot 111, thereby limiting the displacement of the locking piece 22 in the direction of disengaging from the narrow slot 111.

[0072] See Figure 4 In one embodiment of this disclosure, the tilting limiting portion 221 consists of a plurality of wedge-shaped blocks arranged at intervals along the insertion direction perpendicular to the locking piece 22.

[0073] In detail, the wedge blocks are arranged in a linear array perpendicular to the insertion direction of the locking plate 22. Multiple wedge blocks work together to share the locking force and have higher structural strength than a single wedge block. It is not easy for the user to crush multiple wedge blocks during operation. In addition, the spacing between the wedge blocks can be adjusted to accommodate locking plates 22 of different sizes, which is highly flexible.

[0074] See Figure 2 and Figure 4 In one embodiment of this disclosure, the lid 2 also has an opening tab 23, which is configured to pull the lid 2 down by external force after the locking tab 22 is separated from the box body 1 by the tear line 21.

[0075] Thus, by setting the opening tab 23 on the lid 2, an operating point can be provided for the user to open the anti-accidental opening packaging box, avoiding the user from directly squeezing the lid 2 to open the anti-accidental opening packaging box, which is difficult to operate and easy to damage the items inside the anti-accidental opening packaging box; or, it avoids the user from directly tearing the locking tab 22. Since the locking tab 22 has a small area and is tightly attached to the box body 1, directly tearing the tear line 21 of the locking tab 22 can easily cause finger cuts and is not easy to operate.

[0076] See Figure 1 and Figure 4 In one embodiment of this disclosure, the box body 1 has two opening tabs 23, which are respectively disposed on both sides of the locking tab 22, and the opening tab 23 near the locking tab 22 is a smooth curved surface extending from the tear line 21 away from the locking tab 22.

[0077] In detail, the two opening tabs 23 are respectively set on both sides of the locking tab 22, forming a symmetrical structure centered on the locking tab 22. When opening, the user can pinch the opening tabs 23 on both sides at the same time and exert force outward, or use one hand to hold the box in place to prevent accidental opening, and use the other hand to operate the opening tab 23 on the same side to exert force, which is suitable for different users' operating habits.

[0078] By setting a tear line 21 to reduce the initial opening resistance, users can easily tear open the locking piece 22 without the need for tools. The tear line 21 is set at the junction of the opening piece 23 and the locking piece 22, which clarifies the point of force for opening and prevents users from forcibly disassembling the box because they cannot find the opening position, thus protecting other structures of the anti-accidental opening packaging box.

[0079] Furthermore, the opening tab 23 near the locking tab 22 has a smooth curved surface extending from the tear line 21 away from the locking tab 22, avoiding the structure of the locking tab 22 and increasing the connection strength between the opening tab 23 and the box body 1. At the same time, the curved surface transition increases the area of ​​the opening tab 23, making it easier to operate, conforming to the arc of finger force, and improving grip comfort. In addition, the rounded curved surface avoids sharp right angles, ensuring a stable opening path, and the tear line 21 is torn smoothly without jamming, preventing the box lid 2 from cracking inward from the right angle when opening, and also preventing fingers from being scratched when opening.

[0080] See Figure 1 and Figure 4 In one embodiment of this disclosure, the force-bearing surface of the box opener 23 is provided with a plurality of anti-slip protrusions.

[0081] In detail, the force-bearing surface of the box opener 23 is provided with several anti-slip protrusions. The anti-slip protrusions are small dot-shaped, strip-shaped or grid-shaped three-dimensional structures with a height set between 0.5-2mm. This disclosure increases the contact area and surface roughness between the box opener 23 and the fingers through the protrusion structure, thereby improving the initial grip strength.

[0082] Furthermore, the hardness and shape of the protrusions provide clear tactile feedback, which can help users quickly locate the operation position. The force-bearing surface of the box-opening tab 23 disclosed herein is the side closer to the box body 1. When the user holds the box-opening tab 23, the fingers will naturally apply force away from the box body 1. Setting the force-bearing surface closer to the box body 1 allows the anti-slip protrusion to contact the fingertip more directly, avoiding force deviation caused by the force-bearing surface being too far away.

[0083] See Figure 1 and Figure 2 In one embodiment of this disclosure, the box body 1 has a first fitting surface and the box cover 2 has a second fitting surface. When the box body 1 and the box cover 2 are closed, the first fitting surface and the second fitting surface abut against each other. A sealing ring 12 is provided on the first fitting surface and a sealing groove 24 is provided on the second fitting surface. The sealing ring 12 is embedded in the sealing groove 24.

[0084] The first and second mating surfaces maintain a certain flatness to ensure that the sealing ring 12 and the sealing groove 24 are fully in contact and engaged when closed, avoiding local leakage caused by local protrusions or depressions on the mating surfaces.

[0085] Furthermore, the sealing ring 12 is a raised annular structure with a cross-section that can be circular, rectangular, or trapezoidal. Its material must have a certain degree of elasticity to ensure that it can undergo slight deformation when it fits against the sealing groove 24, filling tiny gaps. The sealing groove 24 is an annular groove that matches the sealing ring 12. The groove depth is slightly greater than the height of the sealing ring 12, and the groove width is precisely matched with the diameter or thickness of the sealing ring 12. If it is too wide, it will cause wobbling; if it is too narrow, it may squeeze the sealing ring 12 and deform it excessively, affecting the sealing performance or the smoothness of opening and closing the packaging box to prevent accidental opening.

[0086] The working principle of this disclosure on preventing accidental opening of packaging boxes will be further explained next using an application scenario of such a box.

[0087] Specifically, such as Figure 1 The anti-accidental opening packaging box shown is in the open state. After the user places the item into the box body 1, they lift the lid 2, causing it to snap against the box body 1. As the lid 2 approaches the box body 1, the user holds the locking piece 22, controlling its free end to enter the recess 11 of the box body 1, then reach the bottom of the recess 11, and insert into the narrow slot 111 at the bottom of the recess. The user then continuously applies external force to the locking piece 22, causing the inclined limiting part 221, composed of multiple wedge-shaped blocks on the locking piece 22, to push the stop piece 112 of the narrow slot 111. Specifically, from the small end to the large end of the wedge-shaped blocks, the stop piece 112 is gradually pushed to bend, thereby causing the narrow slot 111 to... As the width of 11 increases, the side wings 222 of the locking piece 22 gradually bend under the pressure of the narrow groove 111. Finally, the inclined limiting part 221 and the side wings 222 of the locking piece 22 both pass through the narrow groove 111. At this time, the stop piece 112 is reset. The inclined limiting part 221 and the side wings 222 limit the displacement of the locking piece 22 in the direction of disengaging from the narrow groove 111. At the same time, the first contact surface of the box body 1 and the second contact surface of the box cover 2 abut against each other, and the sealing ring 12 of the first contact surface is embedded in the sealing groove 24 of the second contact surface.

[0088] After that, as Figure 2The closed anti-accidental opening packaging box shown is opened by the user holding the edge of the recessed groove 11 on the box body 1 with one hand and the opening tab 23 next to the locking tab 22 with the other hand. The user applies force away from the box body 1, thereby gradually tearing the tear line 21 between the locking tab 22 and the box cover 2, separating the locking tab 22 from the box cover 2. Then, the user continues to apply force, causing the sealing ring 12 on the first mating surface to separate from the sealing groove 24 on the second mating surface. The box body 1 and the box cover 2 are no longer mated, thus opening the anti-accidental opening packaging box.

[0089] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. A tamper-evident packaging box, characterized in that The anti-misopening packaging box comprises: a box body (1) provided with a long and narrow slot (111) and a stop piece (112) extending along the width direction of the long and narrow slot (111); a box cover (2) provided with a lock piece (22) in a tearable manner through a tear line (21), the lock piece (22) being provided with an inclined limiting portion (221) pointing from a free end to a fixed end; the lock piece (22) is configured to be inserted into the long and narrow slot (111) after being subjected to a force, and the stop piece (112) is pushed to bend by the inclined limiting portion (221) until the inclined limiting portion (221) passes through the long and narrow slot (111), and then the stop piece (112) is reset to limit the displacement of the lock piece (22) in a direction away from the long and narrow slot (111) through the inclined limiting portion (221).

2. A tamper-evident packaging box according to claim 1, characterized in that a preset gap is formed between the stop piece (112) and the long and narrow slot (111), and the free end of the lock piece (22) is inserted into the long and narrow slot (111) through the preset gap.

3. A tamper-evident packaging box according to claim 1, characterized in that the stop piece (112) is a trapezoidal stop piece.

4. A tamper-evident packaging box according to claim 1, characterized in that the box body (1) is provided with a first abutting surface, the box cover (2) is provided with a second abutting surface, the first abutting surface and the second abutting surface abut in a closed state of the box body (1) and the box cover (2), and the tear line (21) of the lock piece (22) is coplanar with the second abutting surface; the box body (1) is provided with a sink (11) on the first abutting surface, the long and narrow slot (111) is formed in the bottom of the sink (11), and a first distance between the tear line (21) and a matching surface of the inclined limiting portion (221) matched with the stop piece (112) is equal to or greater than a second distance between the first abutting surface and the bottom of the sink (11).

5. A tamper-evident packaging box according to claim 4, characterized in that the sink (11) is provided with a slot larger than the bottom, and the cross-sectional area of the sink (11) decreases in a direction from the slot to the bottom.

6. A tamper-evident packaging box according to claim 1, characterized in that the lock piece (22) is provided with side wings (222) extending outward from both sides, and the side wings (222) are configured to limit the displacement of the lock piece (22) in a direction perpendicular to the insertion direction of the lock piece (22) after the reset of the stop piece (112).

7. A tamper-evident packaging box according to claim 1, characterized in that the inclined limiting portion (221) is a wedge-shaped block, the large end of the wedge-shaped block is close to the tear line (21), the small end is close to the free end of the lock piece (22), and the wedge-shaped block and the free end of the lock piece (22) have a first preset distance therebetween.

8. A tamper-evident packaging box according to claim 7, characterized in that the inclined limiting portion (221) is a plurality of wedge-shaped blocks arranged in sequence and spaced apart in a direction perpendicular to the insertion direction of the lock piece (22).

9. A tamper-evident packaging box according to claim 1, characterized in that the box cover (2) is further provided with an opening piece (23) configured to pull the box cover (2) under an external force after the lock piece (22) is separated from the box body (1) through the tear line (21).

10. A tamper-evident packaging box according to claim 9, characterized in that The box body (1) has two opening box sheets (23), which are arranged on two sides of the lock sheet (22), and the side of the opening box sheet (23) close to the lock sheet (22) is a smooth curved surface extending away from the lock sheet (22) by the tear line (21).

11. A tamper-evident pack according to claim 9, wherein The stress surface of the opening box sheet (23) is provided with a plurality of anti-skid protrusions.

12. A tamper-evident packaging box according to any one of claims 1 to 11, characterised in that The box body (1) has a first lamination surface, the box cover (2) has a second lamination surface, and the first lamination surface and the second lamination surface abut in the closed state of the box body (1) and the box cover (2). The first lamination surface is provided with a sealing ring (12), the second lamination surface is provided with a sealing groove (24), and the sealing ring (12) is embedded in the sealing groove (24).

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