A packaging carton with corner protection structure
By installing protective block components on the corners of packaging cartons, the problem of insufficient protection of traditional cartons is solved, achieving stronger impact resistance and convenient material replacement, thereby improving product integrity and reuse value.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PRIMICALE DIGITAL IMAGING TECH (SHANGHAI) CO LTD
- Filing Date
- 2025-08-19
- Publication Date
- 2026-06-19
AI Technical Summary
Traditional corrugated cardboard boxes offer poor protection in the corner areas, failing to effectively resist external impacts and compression, resulting in damage to the overall structural strength and affecting product integrity and recycling value.
Protective block assemblies are installed at the corners of packaging cartons. These assemblies include blocks, inserts, corrugated boards, and filler blocks. Through an interlocking and removable mounting plate structure, they provide multi-layer protection. The filler blocks can be made of different materials to meet various protection requirements.
It improves the impact resistance of packaging cartons, enhances edge and corner protection, increases product integrity and reuse value, and the detachable design of the filling blocks makes it easy to adapt to different protection needs.
Smart Images

Figure CN224376208U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of packaging carton technology, and in particular to a packaging carton with a corner protection structure. Background Technology
[0002] With the rapid development of logistics and warehousing, cardboard boxes, as the most widely used transportation medium, directly affect the integrity of the packaged products and transportation costs. However, traditional corrugated cardboard boxes, especially in the corner areas, offer poor overall protection and lack corner protection structures to resist external impacts, compression, and drops. Such structures cannot guarantee effective packaging and product integrity, and the overall structural strength of the cardboard box is severely damaged after impact deformation, reducing its recycling value. Utility Model Content
[0003] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a packaging carton with a corner protection structure.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A packaging carton with a corner protection structure includes a carton body and a lid. A protective frame first is installed on the outside of the carton body, and a protective frame second is installed on the outside of the lid. Protective block assemblies are installed at the four corners of the outer sides of both the protective frame second and the protective frame first.
[0006] The protective block assembly includes a block body and insert plates. A pair of insert plates are provided on the inner side of the block body, and the insert plates are inserted into slots opened on the bottom wall of the protective frame.
[0007] A corrugated plate is installed on the inner side of the block, and mounting grooves are provided on both sides away from the corrugated plate. A filler block is installed in the mounting groove through a mounting plate. Multiple inserts are provided on one side of the mounting plate, and each insert is inserted into the corrugated plate.
[0008] Furthermore, a preferred structure is that a solid column is vertically installed inside the middle corner of the block.
[0009] Furthermore, a preferred structure is that the block has an "L"-shaped structure in its horizontal cross-section.
[0010] Furthermore, a preferred structure is that mounting grooves are symmetrically formed on both sides of the interior of the block.
[0011] Furthermore, a preferred structure is that the corrugated plate has a corrugated structure with equal, continuous concave and convex curved surfaces, and the recesses form slots for inserting inserts.
[0012] In addition, a preferred structure is that a pair of insert posts are provided at each of the four upper corners of the first protective frame, and the insert posts and the insertion holes opened on the bottom wall of the second protective frame are mutually connected.
[0013] Furthermore, in a preferred configuration, the mounting plate has a "T" shape in its horizontal cross-section, with the horizontal section inserted into the mounting groove and multiple inserts installed on the inner side of the vertical section.
[0014] The beneficial effects of this utility model are as follows:
[0015] In this utility model, protective block assemblies are provided at the corners of the box and the cover. The assemblies contain filling blocks and corrugated plates to improve the overall impact resistance. The filling blocks are set on a detachable mounting plate. The mounting plate is connected to the corrugated plate by multiple inserts. Different protection needs can be met by replacing the filling blocks with different materials. The protective block assemblies can also be removed from the box. They not only have a stable corner protection structure but also improve the secondary use value. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of a packaging carton with corner protection structure proposed in this utility model.
[0017] Figure 2 This is a schematic diagram of the connection structure between the box body and the cover body proposed in this utility model;
[0018] Figure 3 This is a schematic diagram of the connection structure of the protective block assembly and the protective frame proposed in this utility model;
[0019] Figure 4 This is a schematic diagram of the overall structure of the protective frame proposed in this utility model;
[0020] Figure 5 This is a schematic diagram of the overall structure of the protective block assembly proposed in this utility model;
[0021] Figure 6 This is a schematic diagram of the mounting plate structure proposed in this utility model;
[0022] Figure 7 This is a schematic diagram of the connection structure between the protective block assembly and the protective frame proposed in this utility model.
[0023] In the diagram: 1. Box body; 2. Protective frame one; 21. Insert post; 22. Slot; 3. Protective block assembly; 31. Block; 32. Drawer panel; 33. Insert panel; 34. Solid column; 35. Corrugated plate; 36. Mounting groove; 37. Filler block; 38. Mounting plate; 381. Insert strip; 4. Cover body; 41. Protective frame two; 411. Insert hole. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0025] Reference Figure 1-6 A packaging carton with a corner protection structure includes a carton body 1 and a cover 4. A protective frame 2 is installed on the outside of the carton body 1, and a protective frame 41 is installed on the outside of the cover 4. Protective block components 3 are installed at the four corners of the outer sides of the protective frame 41 and the protective frame 2.
[0026] Among them, the protective frame 2 is installed at the bottom of the box 1;
[0027] The protective frame 2 is installed on the top of the cover 4.
[0028] The box body 1 and the lid 4 are connected to form a complete packaging carton.
[0029] The protective block assembly 3 includes a block 31 and insert plates 33. A pair of insert plates 33 are provided on the inner side of the block 31. The insert plates 33 are inserted into the slots 22 opened on the bottom wall of the protective frame 2.
[0030] A corrugated plate 35 is installed on the inner side of the block 31. Mounting grooves 36 are provided on both sides away from the corrugated plate 35. A filling block 37 is installed in the mounting groove 36 through a mounting plate 38. Multiple inserts 381 are provided on one side of the mounting plate 38, and each insert 381 is inserted into the corrugated plate 35.
[0031] Solid pillars 34 are vertically installed inside the middle corner of block 31 to ensure the protective effect of block 31 at its own corner.
[0032] Block 31 has an "L" shaped structure in its horizontal cross section.
[0033] The two sides of the interior of the block 31 are symmetrically provided with mounting grooves 36.
[0034] The corrugated plate 35 has a corrugated structure with equal continuous concave and convex curved surfaces, and the recesses form slots for inserting the insert strip 381.
[0035] Each of the four corners of the upper part of the protective frame 2 is provided with a pair of insert posts 21, and the insert posts 21 and the insertion holes 411 opened on the bottom wall of the protective frame 41 are mutually connected.
[0036] The mounting plate 38 has a "T" shape in its horizontal cross section. The horizontal section is inserted into the mounting groove 36, and multiple inserts 381 are installed on the inner side of the vertical section.
[0037] Reference Figure 7A pair of slots are provided at the four corners of the upper part of the second protective frame 41 to insert the protective block assembly 3, so as to meet the insertion requirements of the internal insert plate 33 of the protective block assembly 3. This is easy to understand intuitively and will not be explained further.
[0038] In this embodiment, the insertion hole 411 at the bottom of the cover 4 is aligned with the insertion post 21 at the top of the box 1 and inserted to connect, so that the cover 4 covers the box 1 to form the whole packaging carton.
[0039] In practical applications, when external impact is applied to the housing 1, the first protective frame 2 and the second protective frame 4 provide basic protection, and the protective block components 3 installed on the first protective frame 2 and the second protective frame 4 provide corner protection, specifically:
[0040] The filling block 37 inside the protective block assembly 3 can effectively absorb external impacts, and the wave plate 35 on one side of the filling block 37 can provide effective support through its wave-shaped structure, effectively ensuring the overall impact resistance of the block 31.
[0041] The filling block 37 can be made of foam, cotton, sponge, or plastic board.
[0042] Meanwhile, when the packaging carton has completed its conveying task or is being reused, the parts installed on the carton body 1 and cover 4 can be removed along the opening direction of the slot 22 on the carton body 1 and cover 4, specifically as follows:
[0043] Pull the insert plate 33 inside the block 31 to disengage it from the slot 22 and complete the disassembly.
[0044] Furthermore, to ensure the protective effect of the block 31, the mounting plate 38 on one side of the block 31 can still be pulled out, and the material of the internal filling block 37 can be replaced (such as replacing the sponge filling block with a plastic filling block, which is easy to understand intuitively) to meet different protection requirements. Then, the filling block 37 is placed on one side of the mounting plate 38, and the mounting plate 38 is inserted together into the mounting groove 36 opened in the middle of the block 31. At that time, the multiple inserts 381 provided on the other side of the mounting plate 38 will be inserted into the corrugated plate 35 adjacent to the mounting groove 36 to complete the insertion.
[0045] The corrugated plate 35 has a corrugated structure with equal continuous concave and convex curved surfaces, and the recessed areas form slots for inserting the insert strip 381.
[0046] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A packaging carton with corner protection structure, comprising a carton body (1) and a lid (4), characterized in that, The outer side of the box (1) is equipped with a protective frame one (2), and the outer side of the cover (4) is equipped with a protective frame two (41). Protective block components (3) are installed at the four corners of the outer side of the protective frame two (41) and the protective frame one (2). The protective block assembly (3) includes a block (31) and insert plates (33). A pair of insert plates (33) are provided on the inner side of the block (31). The insert plates (33) are inserted into the slots (22) opened on the bottom wall of the protective frame (2). A corrugated plate (35) is installed on the inner side of the block (31). Mounting grooves (36) are provided on both sides away from the corrugated plate (35). A filling block (37) is installed in the mounting groove (36) through a mounting plate (38). A plurality of inserts (381) are provided on one side of the mounting plate (38), and each insert (381) is inserted into the corrugated plate (35).
2. A packaging carton with corner protection structure according to claim 1, characterized in that, A solid column (34) is vertically installed inside the middle corner of the block (31).
3. A packaging carton with corner protection structure according to claim 1, characterized in that, The block (31) has an "L" shaped structure in the horizontal cross section.
4. A packaging carton with corner protection structure according to claim 3, characterized in that, The block (31) has symmetrical mounting slots (36) on both sides inside.
5. A packaging carton with corner protection structure according to claim 1, characterized in that, The wave plate (35) has a wave-shaped structure with equal continuous concave and convex curved surfaces, and the recesses form slots for inserting the insert strip (381).
6. A packaging carton with corner protection structure according to claim 1, characterized in that, A pair of inserts (21) are provided at the four corners of the upper part of the first guard frame (2). The inserts (21) and the insertion holes (411) opened on the bottom wall of the second guard frame (41) are interlocking mechanisms.
7. A packaging carton with corner protection structure according to claim 1, characterized in that, The mounting plate (38) has a "T" shape in the horizontal section, the horizontal section is inserted into the mounting groove (36), and multiple inserts (381) are installed on the inner side of the vertical section.