Automatic locking paper box
By designing limit and switch components for automatic locking paper boxes, the problems of inconvenience and instability in locking paper boxes were solved, achieving convenient locking and stability, reducing costs and improving production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-29
- Publication Date
- 2026-04-14
AI Technical Summary
The existing cardboard box locking structure is inconvenient to operate and not secure, resulting in low production efficiency and difficult maintenance.
An automatic locking paper box was designed, which uses a limit component and a switch component to achieve convenient locking and opening through a purely mechanical structure. The cooperation of the limit groove and the triangular limit block ensures the stability of the locking.
It achieves efficient and convenient locking and opening between the cardboard box lid and the box body, improving the user experience, reducing production and maintenance costs, and ensuring the safety of the contents and the stability of the production line.
Smart Images
Figure CN224117886U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of packaging paper box lock technology, and in particular to automatic locking paper boxes. Background Technology
[0002] With the rapid development of modern logistics and packaging industries, cardboard boxes, as a common packaging container, are widely used in various fields such as food, pharmaceuticals, electronic products, and daily necessities. Cardboard boxes not only need to possess excellent protective performance to ensure the safety of their contents during transportation and storage, but also need to be convenient and stable when opening and closing to meet consumers' demands for packaging experience. Especially on automated packaging production lines, the quick and accurate locking and opening of cardboard boxes has become a key factor in improving production efficiency and reducing labor costs.
[0003] In the prior art, many cardboard box locking structures rely on complex mechanical or electronic control systems, which not only increases production costs but also raises maintenance difficulties. A system malfunction can cause the entire packaging production line to halt. On the other hand, while some cardboard box locking structures are simple, they are inconvenient to operate, requiring manual locking or unlocking, resulting in low efficiency and susceptibility to damage or insecure locking due to improper operation, thus lacking practicality. Therefore, this utility model discloses an automatic locking cardboard box to solve the problems of inconvenient operation and insecure locking in the prior art. Utility Model Content
[0004] In view of this, the purpose of this utility model is to propose an automatic locking cardboard box to solve the problems of inconvenient operation and weak locking of cardboard boxes in the prior art.
[0005] To achieve the above objectives, this utility model provides an automatic locking paper box, comprising: a box body, wherein a set of limiting grooves are respectively opened on the upper surfaces of both sides of the box body, and a hinge is installed on one side of the upper surface of the box body, and a cover plate is installed on the other end of the hinge, wherein a limiting component is provided on the cover plate, the limiting component being used to lock the cover plate onto the box body; and a switch component is provided on the cover plate, the switch component being used to open the limiting component.
[0006] Preferably, the limiting component includes a mounting groove, in which a first operating rod is mounted. An L-shaped connecting rod is mounted on the side wall of the first operating rod located inside the mounting groove. An adjusting rod is mounted at the other end of the L-shaped connecting rod. A rotating shaft is rotatably mounted in the middle of the adjusting rod. Both ends of the rotating shaft are mounted on the inner wall of the mounting groove. A second operating rod is mounted at the other end of the adjusting rod, abutting against the side wall on the same side as the L-shaped connecting rod. Two sets of sliding grooves are formed on the inner walls of both ends of the mounting groove between the first operating rod and the second operating rod. The corresponding positions of the... A set of sliding rods is slidably installed in the sliding groove, and a first locking block is installed on the two sets of sliding rods on the same side. A second locking block is installed on the two sets of sliding rods on the other side. Two sets of first telescopic rods are installed vertically on the sidewalls opposite to the first locking block and the second locking block. Locking springs are sleeved on the two sets of first telescopic rods. Triangular limiting blocks are installed at the ends of the outer sidewalls of the first locking block and the second locking block. A groove with the same size as the triangular limiting block is opened in the limiting groove corresponding to the positions of the two sets of triangular limiting blocks.
[0007] Preferably, the adjusting rod has a circular hole of the same size as the rotating shaft at the position corresponding to the position of the rotating shaft.
[0008] Preferably, the end of the second operating lever connected to the second locking block is fixedly installed.
[0009] Preferably, one end of each set of sliding rods is slidably installed in the sliding groove at the corresponding position, and the other end of each set of sliding rods is fixedly installed on the side wall of the first locking block and the second locking block at the corresponding position.
[0010] Preferably, one end of the locking spring is fixedly installed on the side wall of the first locking block, and the other end of the locking spring is fixedly installed on the side wall of the second locking block.
[0011] Preferably, the switch assembly includes a switch block, which is installed in the mounting groove at the other end of the first operating rod. One end of the switch block is slidably installed on one end of the first operating rod. A push rod is fixedly installed on the side wall of the other end of the switch block, and the other end of the push rod protrudes through the side wall of the cover plate. A loading groove is provided on the cover plate corresponding to the position of the push rod. A second telescopic rod is installed on the side wall of the loading groove opposite to the push rod. The other end of the second telescopic rod is fixedly installed on the push rod, and a return spring is sleeved on the second telescopic rod.
[0012] Preferably, the ends of the switch block and the first operating lever that slide in contact with each other are both inclined, one end of the reset spring is fixedly installed on the side wall of the loading groove, and the other end of the reset spring is fixedly installed on the side wall of the push rod.
[0013] Preferably, the sidewall of the switch block is slidably engaged with the sidewall of the mounting groove.
[0014] The beneficial effects of this utility model are:
[0015] This utility model provides an automatic locking cardboard box that achieves efficient and convenient locking and opening between the box lid and the box body through the design of a limiting component and a switch component. During locking, the user only needs to close the lid; the first and second locking blocks in the limiting component automatically unfold to both sides under the action of the locking spring, and the triangular limiting block then engages with the limiting groove on the box body, completing a quick and secure lock. The entire process requires no complicated operation, greatly improving packaging efficiency. When it is necessary to open the cardboard box, the user only needs to gently push the push rod in the switch component. The switch block slides and drives the first operating rod to move, and then, through the linkage of the L-shaped connecting rod and the adjusting rod, the first and second locking blocks retract towards the center, the triangular limiting block disengages from the limiting groove, and the lid can be easily opened. This not only simplifies the operation process but also enhances the user experience, making opening the cardboard box more convenient than ever before.
[0016] This invention's automatic locking cardboard box ensures stability and reliability through the combination of a first locking block, a second locking block, and a triangular limiting block in the limiting assembly. The tight fit between the triangular limiting block and the limiting groove effectively prevents the cardboard box from accidentally opening due to vibration or compression during transportation or storage, thus protecting the contents. Furthermore, this invention employs a purely mechanical structure design, eliminating complex mechanical or electronic control systems, which not only reduces production costs but also significantly reduces maintenance difficulty and costs. Even if a malfunction occurs during use, it facilitates quick troubleshooting and repair, preventing the entire packaging production line from halting due to system failure. This low-cost, high-reliability design makes this automatic locking cardboard box more competitive in the market and has broader application prospects. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0019] Figure 2 This is a side view structural diagram of the present invention;
[0020] Figure 3 This is a schematic diagram of the side view sectional structure of the cover plate of this utility model;
[0021] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle;
[0022] Figure 5 This utility model Figure 3 Enlarged structural diagram at point B.
[0023] The diagram is marked as follows:
[0024] 1. Box body; 2. Limiting groove; 3. Cover plate; 4. Hinge; 5. Mounting groove; 6. First operating lever; 7. L-shaped connecting rod; 8. Adjusting rod; 9. Rotating shaft; 10. Second operating lever; 11. First locking block; 12. Second locking block; 13. Sliding rod; 14. Sliding groove; 15. First telescopic rod; 16. Locking spring; 17. Triangular limiting block; 18. Switch block; 19. Push rod; 20. Return spring; 21. Second telescopic rod. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.
[0026] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0027] This utility model provides, for example Figures 1 to 5The automatic locking cardboard box shown includes: a box body 1, with a set of limiting grooves 2 on the upper surfaces of both sides of the box body 1; a hinge 4 is installed on one side of the upper surface of the box body 1, and a cover plate 3 is installed on the other end of the hinge 4; the cover plate 3 is provided with a limiting component for locking the cover plate 3 onto the box body 1; and a switch component is provided on the cover plate 3 for opening the limiting component. The automatic locking cardboard box provided by this utility model, through the design of the limiting component and the switch component, achieves efficient and convenient locking and opening between the cover plate 3 and the box body 1. During the locking process, the user only needs to close the cover plate 3, and the first locking block 11 and the second locking block 12 in the limiting component automatically unfold to both sides under the action of the locking spring 16, and the triangular limiting block 17 then engages in the limiting groove 2 on the box body 1, completing a quick and secure locking. The entire process requires no complicated operation, greatly improving packaging efficiency. When the cardboard box needs to be opened, the user simply pushes the push rod 19 in the switch assembly. The switch block 18 slides and moves the first operating rod 6. Then, through the linkage of the L-shaped connecting rod 7 and the adjusting rod 8, the first locking block 11 and the second locking block 12 retract towards the center, and the triangular limiting block 17 disengages from the limiting groove 2. The cover 3 can then be easily opened. This not only simplifies the operation process but also enhances the user experience, making opening the cardboard box more convenient than ever before. The automatic locking cardboard box of this invention ensures the stability and reliability of the locking mechanism through the combination of the first locking block 11, the second locking block 12, and the triangular limiting block 17 in the limiting assembly. The tight fit between the triangular limiting block 17 and the limiting groove 2 effectively prevents the cardboard box from accidentally opening due to vibration or compression during transportation or storage, thus protecting the contents. Furthermore, this invention adopts a purely mechanical structure design, eliminating complex mechanical or electronic control systems, which not only reduces production costs but also significantly reduces maintenance difficulty and costs. Even if a malfunction occurs during use, it is easy to troubleshoot and repair quickly, preventing the entire packaging production line from coming to a standstill due to system failure. This low-cost, high-reliability design makes the automatic locking cardboard box of this invention more competitive in the market and has a wider range of application prospects.
[0028] Furthermore, in this example, such as Figure 3 and Figure 4As shown, the limiting component includes a mounting groove 5, in which a first operating lever 6 is installed. An L-shaped connecting rod 7 is installed on the side wall of the first operating lever 6 located inside the mounting groove 5. An adjusting rod 8 is installed at the other end of the L-shaped connecting rod 7. A rotating shaft 9 is rotatably installed in the middle of the adjusting rod 8. Both ends of the rotating shaft 9 are installed on the inner wall of the mounting groove 5. A second operating lever 10 is installed at the other end of the adjusting rod 8, which is on the same side wall as the L-shaped connecting rod 7. Two sets of sliding grooves 14 are formed on the inner walls of both ends of the mounting groove 5 between the first operating lever 6 and the second operating lever 10. A set of sliding rods 13 is slidably installed in the corresponding sliding grooves 14. A first locking block 11 is installed on the two sets of sliding rods 13 on the same side. A second locking block 12 is installed on the two sets of sliding rods 13 on the other side. Two sets of first telescopic rods 15 are installed vertically on the side walls opposite to the first locking block 11 and the second locking block 12. Locks are fitted on the two sets of first telescopic rods 15. A fixed spring 16 is provided, and triangular limiting blocks 17 are installed at the outer sidewall ends of the first locking block 11 and the second locking block 12. The limiting groove 2 is provided with a groove of the same size as the triangular limiting blocks 17 at the position corresponding to the two sets of triangular limiting blocks 17. The adjusting rod 8 is provided with a circular hole of the same size as the rotating shaft 9 at the position corresponding to the rotating shaft 9. The end of the second operating rod 10 connected to the second locking block 12 is fixedly installed. One end of each set of sliding rods 13 is slidably installed in the corresponding sliding groove 14, and the other end of each set of sliding rods 13 is fixedly installed on the sidewall of the first locking block 11 and the second locking block 12 at the corresponding position. One end of the locking spring 16 is fixedly installed on the sidewall of the first locking block 11, and the other end of the locking spring 16 is fixedly installed on the sidewall of the second locking block 12. When the user closes the cover plate 3, the first locking block 11 and the second locking block 12 are in a relatively close position in the initial state. At this time, the locking spring 16 is in a compressed or natural state. As the cover plate 3 closes, the outer triangular limiting blocks 17 of the first locking block 11 and the second locking block 12 first contact the edge of the limiting groove 2 on the box body 1. Due to the inclined design of the triangular limiting block 17, as the cover plate 3 continues to press down, the triangular limiting block 17 is squeezed by the edge of the limiting groove 2, causing the first locking block 11 and the second locking block 12 to retract towards the center in the sliding groove 14 via the sliding rod 13. The sliding rod 13 slides in the sliding groove 14, ensuring the smooth movement of the first locking block 11 and the second locking block 12. At the same time, the first operating rod 6 also moves slightly in the mounting groove 5. When the triangular limiting block 17 is fully inserted into the limiting groove 2, the locking spring 16 begins to function, and its elastic force pushes the first locking block 11 and the second locking block 12 to unfold to both sides in the sliding groove 14 via the sliding rod 13 until the triangular limiting block 17 is completely locked into the corresponding groove in the limiting groove 2. At this time, the first locking block 11 and the second locking block 12 are locked in the unfolded state, and the tight cooperation between the triangular limiting block 17 and the limiting groove 2 ensures a firm lock between the cover plate 3 and the box body 1.The first telescopic rod 15 plays a guiding and supporting role in this process, ensuring the stability of the extension and retraction direction of the locking spring 16 and preventing the locking block from shifting.
[0029] Furthermore, in this example, such as Figure 5 As shown, the switch assembly includes a switch block 18, which is installed in the mounting groove 5 at the other end of the first operating lever 6. One end of the switch block 18 is slidably installed on one end of the first operating lever 6, and a push rod 19 is fixedly installed on the side wall of the other end of the switch block 18. The other end of the push rod 19 protrudes through the side wall of the cover plate 3, and a loading groove is provided on the cover plate 3 corresponding to the position of the push rod 19. A second telescopic rod 21 is installed on the side wall of the loading groove opposite to the push rod 19. The other end of the second telescopic rod 21 is fixedly installed on the push rod 19, and a return spring 20 is sleeved on the second telescopic rod 21. The ends of the switch block 18 and the first operating lever 6 that slide in contact with each other are both inclined. One end of the return spring 20 is fixedly installed on the side wall of the loading groove, and the other end of the return spring 20 is fixedly installed on the side wall of the push rod 19. The side wall of the switch block 18 is engaged and slidably installed on the side wall of the mounting groove 5. When the user needs to open the cardboard box, he only needs to push the push rod 19 lightly. When the push rod 19 is subjected to an external force, it moves along the loading groove direction, simultaneously causing the switch block 18, which is fixedly connected to it, to slide at one end of the first operating rod 6. Since the ends of the switch block 18 and the first operating rod 6 that slide against each other are both inclined, the sliding of the switch block 18 will cause the first operating rod 6 to move to a certain extent within the mounting groove 5. The sliding of the switch block 18 will indirectly affect the position of the L-shaped connecting rod 7, and the movement of the first operating rod 6 will push the first locking block 11 to retract towards the center within the sliding groove 14. One end of the L-shaped connecting rod 7 is connected to the first operating rod 6, and the other end abuts against the adjusting rod 8. When the first operating rod 6 moves slightly due to the sliding of the switch block 18, the positional change of the L-shaped connecting rod 7 will be transmitted to the adjusting rod 8, causing the adjusting rod 8 to rotate around the rotating shaft 9. The rotation of the adjusting rod 8 will then push the second operating rod 10 to move. The second operating rod 10 is connected to the second locking block 12, thus causing the second locking block 12 to retract towards the center within the sliding groove 14 via the sliding rod 13. Since the first locking block 11 and the second locking block 12 are connected by a locking spring 16, when the first locking block 11 and the second locking block 12 retract, the locking spring 16 is compressed and retracts towards the middle, thereby achieving synchronous retraction of the two locking blocks. As the first locking block 11 and the second locking block 12 retract, the triangular limiting block 17 disengages from the limiting groove 2, the latch between the cover plate 3 and the box body 1 is released, and the user can easily open the cover plate 3. During the process of pushing the push rod 19, the second telescopic rod 21 ensures the smooth movement of the push rod 19 in the loading groove, while the return spring 20, after the push rod 19 loses external force, pushes the push rod 19 and the switch block 18 to reset through its elasticity, preparing for the next latching operation.
[0030] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.
[0031] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. An automatic locking cardboard box, characterized in that, include: The box body (1) has a set of limiting grooves (2) on the upper surfaces of both sides, and a hinge (4) is installed on one side of the upper surface of the box body (1). A cover plate (3) is installed on the other end of the hinge (4). A limiting component is provided on the cover plate (3) to lock the cover plate (3) on the box body (1). A switch component is provided on the cover plate (3) to open the limiting component.
2. The automatic locking paper box according to claim 1, characterized in that, The limiting component includes a mounting groove (5), in which a first operating rod (6) is installed. An L-shaped connecting rod (7) is installed on the side wall of the first operating rod (6) located inside the mounting groove (5). An adjusting rod (8) is installed at the other end of the L-shaped connecting rod (7). A rotating shaft (9) is rotatably installed in the middle of the adjusting rod (8). Both ends of the rotating shaft (9) are installed on the inner wall of the mounting groove (5). A second operating rod (10) is installed at the other end of the adjusting rod (8) on the same side wall as the L-shaped connecting rod (7). Two sets of sliding grooves (14) are opened on the inner walls of both ends of the mounting groove (5) between the first operating rod (6) and the second operating rod (10). The sliding grooves (14) at corresponding positions are... A set of sliding rods (13) are slidably installed in the inner side of the first locking block (13). A first locking block (11) is installed on the two sets of sliding rods (13) on the same side. A second locking block (12) is installed on the two sets of sliding rods (13) on the other side. Two sets of first telescopic rods (15) are installed vertically on the sidewalls opposite to the first locking block (11) and the second locking block (12). Locking springs (16) are sleeved on the two sets of first telescopic rods (15). Triangular limit blocks (17) are installed at the ends of the outer sidewalls of the first locking block (11) and the second locking block (12). A groove with the same size as the triangular limit block (17) is opened in the limiting groove (2) at the positions corresponding to the two sets of triangular limit blocks (17).
3. The automatic locking paper box according to claim 2, characterized in that, The adjusting rod (8) has a circular hole of the same size as the rotating shaft (9) at the position corresponding to the rotating shaft (9).
4. The automatic locking paper box according to claim 3, characterized in that, The end of the second operating lever (10) connected to the second locking block (12) is fixedly installed.
5. The automatic locking paper box according to claim 4, characterized in that, One end of each set of sliding rods (13) is slidably installed in the corresponding sliding groove (14), and the other end of each set of sliding rods (13) is fixedly installed on the side wall of the first locking block (11) and the second locking block (12) at the corresponding position.
6. The automatic locking paper box according to claim 5, characterized in that, One end of the locking spring (16) is fixedly installed on the side wall of the first locking block (11), and the other end of the locking spring (16) is fixedly installed on the side wall of the second locking block (12).
7. The automatic locking paper box according to claim 6, characterized in that, The switch assembly includes a switch block (18), which is installed in the mounting groove (5) at the other end of the first operating lever (6). One end of the switch block (18) is slidably installed on one end of the first operating lever (6). A push rod (19) is fixedly installed on the side wall of the other end of the switch block (18). The other end of the push rod (19) protrudes through the side wall of the cover plate (3). A loading groove is provided on the cover plate (3) at the position corresponding to the push rod (19). A second telescopic rod (21) is installed on the side wall opposite to the push rod (19). The other end of the second telescopic rod (21) is fixedly installed on the push rod (19). A return spring (20) is sleeved on the second telescopic rod (21).
8. The automatic locking paper box according to claim 7, characterized in that, The ends of the switch block (18) and the first operating rod (6) that slide in contact with each other are both inclined. One end of the reset spring (20) is fixedly installed on the side wall of the loading groove, and the other end of the reset spring (20) is fixedly installed on the side wall of the push rod (19).
9. The automatic locking paper box according to claim 8, characterized in that, The sidewall of the switch block (18) is engaged and slidably mounted on the sidewall of the mounting groove (5).