A multiwall protective carton having a visualization window

Abstract

The utility model relates to carton technical field especially is a kind of multilayer protective carton with visual window, including carton bottom frame, the top of carton bottom frame is equipped with upper panel, rectangular window and bell mouth are respectively set up from top to bottom in the surface middle position of upper panel, the inside top surface of bell mouth is adhered with PVC transparent sheet, in the utility model, by the cover plate, central block, lightweight continuous column, color sealing gasket, adhesive layer, lower insertion frame and hollow buckle plate being set, the multilayer protective carton with visual window can be conveniently made when visualizing, the reserved setting of rectangular window and bell mouth is lowered, respectively in the inside of both, install upper fastening assembly and hollow buckle plate, to reach the strength of the multilayer protective carton reserved window position, prevent the problem that multilayer protective carton is weakened in subsequent actual use, partial strength and overall compressive strength significantly reduce, reduce the risk that window edge position is prone to tear damage.

Description

Technical Field

[0001] This utility model relates to the field of cardboard box technology, specifically to a multi-layer protective cardboard box with a visual window. Background Technology

[0002] In the field of cardboard packaging, multi-layer protective cardboard boxes refer to cardboard boxes made of two or more layers of corrugated cardboard bonded together. They typically include three-layer, five-layer, and seven-layer types. Through multi-layer structural design, these cardboard boxes enhance their load-bearing capacity and protective performance, making them suitable for various packaging needs that require high-strength protection. Existing multi-layer protective cardboard boxes usually have viewing windows, allowing users to easily check the condition inside the box without having to frequently open and close it, thus improving the user experience.

[0003] Currently, existing multi-layer protective cardboard boxes with viewing windows are manufactured by creating rectangular or other irregularly shaped windows on one side of the box and then bonding PVC material inside the window to achieve visibility. However, considering that the opening of the window will damage the structural stability of the multi-layer corrugated cardboard, the local support at the window position will be weakened during subsequent use, and the overall compressive strength will also be significantly reduced, increasing the risk of tearing and damage at the window edge. Therefore, a multi-layer protective cardboard box with a viewing window is proposed to address the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a multi-layer protective cardboard box with a visual window, in order to solve the problem mentioned in the background art that when existing multi-layer protective cardboard boxes with visual windows are manufactured and used, the local support force at the window position is weakened and they are prone to tearing and damage.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A multi-layer protective cardboard box with a viewing window includes a bottom frame. A top panel is provided on the top of the bottom frame. A rectangular window and a flared opening are respectively opened from top to bottom in the middle of the surface of the top panel. A PVC transparent sheet is glued to the inner top surface of the flared opening. A hollow snap plate is attached to the bottom of the PVC transparent sheet. Hollow rivets, which are fixedly connected to the top panel, are provided in the middle of the front and rear ends and the middle of the left and right sides of the inner side of the flared opening. Riveting holes are provided on the hollow snap plate and the PVC transparent sheet opposite the hollow rivets. Lower insert frames are snapped into the four corners of the inner side of the rectangular window. A cover plate is fixedly connected to the top of the lower insert frame. A central square is fixedly connected to the inner corner of the lower insert frame. A lightweight connecting column is fixedly connected between the two central squares. A color-changing sealing gasket is fitted over the lightweight connecting column, and an adhesive layer is glued to the bottom of the sealing gasket.

[0007] Preferably, a pull-out inner box is slidably connected to the inner side of the bottom frame of the carton, and the size of the space between the bottom frame and the top panel of the carton matches the size of the pull-out inner box.

[0008] Preferably, the pull-out inner box has side openings on both the left and right sides, and a flexible block is glued to the inside of the side opening, with the flexible block positioned on the center line of the side opening.

[0009] Preferably, the rectangular window and the flared opening are connected, the size of the PVC transparent sheet is larger than the size of the rectangular window, the PVC transparent sheet and the adhesive layer are bonded together, the PVC transparent sheet, the adhesive layer and the color-changing sealing gasket form a three-layer structure, and the color-changing sealing gasket and the lower insert frame are bonded together.

[0010] Preferably, the lower insert frame has a hollow triangular structure, the four central blocks are fixedly connected together by four lightweight connecting columns, the bottom surface of the cover plate and the top surface of the upper panel are fitted together, and the lightweight connecting columns extend to the inner side of the lower insert frame.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] In this invention, the inclusion of a cover plate, a central square, a lightweight connecting column, a color-changing sealing gasket, an adhesive layer, a lower insert frame, and a hollow buckle plate facilitates the installation of an upper fastening assembly and a hollow buckle plate within the rectangular window and flared opening, respectively. This enhances the strength of the reserved window area, preventing weakening of local support and a significant reduction in overall compressive strength due to partial openings during subsequent use. It also reduces the risk of tearing at the window edges. Furthermore, the compression force generated by the upper fastening assembly and the hollow buckle plate improves the structural stability of the PVC transparent sheet mounted on the reverse side of the upper panel. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a partial cross-sectional view of the upper panel of this utility model;

[0015] Figure 3 This is a bottom view of the top panel structure of this utility model;

[0016] Figure 4 This is a bottom view of the lower insertion frame structure of this utility model.

[0017] In the diagram: 1. Carton bottom frame; 2. Top panel; 3. Rectangular window; 4. Flared opening; 5. PVC transparent sheet; 6. Hollow snap-on panel; 7. Cover plate; 8. Central square; 9. Lightweight connecting column; 10. Color-changing sealing gasket; 11. Adhesive layer; 12. Hollow rivet; 13. Pull-out inner box; 14. Side notch; 15. Flexible block; 16. Riveting hole; 17. Lower insert frame. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-4 This utility model provides a technical solution:

[0020] A multi-layer protective cardboard box with a visible window includes a bottom frame 1. The top of the bottom frame 1 is provided with a top panel 2. A rectangular window 3 and a flared opening 4 are respectively opened from top to bottom in the middle of the surface of the top panel 2. A PVC transparent sheet 5 is glued to the inner top surface of the flared opening 4. A hollow buckle plate 6 is attached to the bottom of the PVC transparent sheet 5. Hollow rivets 12 are fixedly connected to the top panel 2 in the middle of the front and rear ends and the middle of the left and right sides of the inner side of the flared opening 4. Riveting holes 16 are opened in the hollow buckle plate 6 and the PVC transparent sheet 5 opposite to the hollow rivets 12. A lower insert frame 17 is snapped into the four corners of the inner side of the rectangular window 3. A cover plate 7 is fixedly connected to the top of the lower insert frame 17. A central square 8 is fixedly connected to the inner corner of the lower insert frame 17. A lightweight connecting column 9 is fixedly connected between the two central squares 8. A color-changing sealing gasket 10 is sleeved on the outside of the lightweight connecting column 9. An adhesive layer 11 is glued to the bottom of the sealing gasket.

[0021] like Figure 1 As shown, a pull-out inner box 13 is slidably connected to the inner side of the carton bottom frame 1. The size of the space between the carton bottom frame 1 and the top panel 2 matches the size of the pull-out inner box 13. The matching of inner and outer dimensions facilitates precise engagement between the carton bottom frame 1 and the pull-out inner box 13. Side openings 14 are provided on both the left and right sides of the pull-out inner box 13. Flexible blocks 15 are glued to the inner side of the side openings 14. The flexible blocks 15 are set on the center line of the side openings 14. The traction structure formed by the side openings 14 and the flexible blocks 15 assists the user in pulling and pulling the pull-out inner box 13.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a conductive connection is provided between the rectangular window 3 and the flared opening 4. The size of the PVC transparent sheet 5 is larger than that of the rectangular window 3. The PVC transparent sheet 5 and the adhesive layer 11 are bonded together. A three-layer structure is formed between the PVC transparent sheet 5, the adhesive layer 11, and the color-changing sealing gasket 10. The color-changing sealing gasket 10 and the lower insert frame 17 are bonded together. The lightweight connecting column 9 is covered with a color-changing sealing gasket 10 that is entirely kraft paper colored. This not only makes the connection between the upper fastening component and the upper panel 2 tighter and more natural and beautiful, but also, to a certain extent, plays a role in providing auxiliary sealing at the connection between the rectangular window 3 and the PVC transparent sheet 5. The lower insert frame 17 has a hollow triangular structure. The four central squares 8 are fixedly connected together by four lightweight connecting columns 9. The bottom surface of the cover plate 7 is attached to the top surface of the upper panel 2. The lightweight connecting columns 9 extend to the inside of the lower insert frame 17. The four lightweight connecting columns 9 mainly serve to transfer the four lower insert frames 17 at the same time, so that the four lower insert frames 17 can be installed simultaneously.

[0023] Workflow: Four hollow rivets 12 are pre-pressed and fixed near the edge of the rectangular window 3. Before the packaging of this utility model is put into use, during the production of the viewing window, with the rectangular window 3 and the flared opening 4 connected, aligning with the inside of the flared opening 4, first, through the multiple pre-drilled rivet holes 16, the PVC transparent sheet 5 is fitted onto the outside of the four rivets, and then bonded to the inner side of the flared opening 4 with a high-temperature resistant adhesive. Next, through the multiple pre-drilled rivet holes 16, the hollow buckle plate 6 is similarly fitted onto the outside of the four rivets, allowing the hollow buckle plate 6 to be embedded inside the flared opening 4, pressing against the PVC transparent sheet 5. Anchoring inserts compatible with the hollow rivets 12 are then inserted into these inserts, fixing the hollow buckle plate 6 from bottom to top. Then, the release paper at the bottom of the adhesive layer 11 is removed, and aligning with the inside of the rectangular window 3, the four lower insert frames 17 are inserted sequentially into the four corners of the rectangular window 3. The adhesive layer 11 is bonded together with the PVC transparent sheet 5, so that the upper fastening assembly, consisting of the cover plate 7, the central square 8, the lightweight connecting column 9, the color-changing sealing gasket 10, the adhesive layer 11, and the lower insert frame 17, can be stably installed on the rectangular window 3. At this time, the hollow buckle plate 6 and the upper fastening assembly will form a structure that strengthens both the upper and lower parts, so that the visual window set on the upper panel 2 is reinforced at the edges, preventing tearing damage at the window edges. When the carton is finished and needs to be used, insert your hand into the side notch 14, hold the flexible block 15, pull out the inner box 13, put the item in it, and then push the inner box 13 back into the bottom frame 1 of the carton. The item can then be packaged in the multi-layer protective carton. The user can then view the items in the carton through the visual window structure consisting of the rectangular window 3, the flared opening 4, and the PVC transparent sheet 5.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-layer protective cardboard box with a viewing window, comprising a bottom frame (1), characterized in that: The top of the carton bottom frame (1) is provided with a top panel (2). A rectangular window (3) and a flared opening (4) are respectively opened from top to bottom in the middle of the surface of the top panel (2). A PVC transparent sheet (5) is glued to the inner top surface of the flared opening (4). A hollow buckle plate (6) is attached to the bottom of the PVC transparent sheet (5). Hollow rivets (12) that are fixedly connected to the top panel (2) are provided in the middle of the front and rear ends and the middle of the left and right sides of the inner side of the flared opening (4). The hollow buckle plate (6) and the PVC transparent sheet (5) Riveting holes (16) are provided at the positions directly opposite the hollow rivets (12). The four corners of the inner side of the rectangular window (3) are all fitted with lower insert frames (17). The top of the lower insert frame (17) is fixedly connected with a cover plate (7). The inner corners of the lower insert frame (17) are fixedly connected with a central block (8). The two central blocks (8) on the left and right are fixedly connected with a lightweight connecting column (9). The lightweight connecting column (9) is fitted with a color-changing sealing gasket (10). The bottom of the sealing gasket is bonded with an adhesive layer (11).

2. A multi-layer protective cardboard box with a visual window according to claim 1, characterized in that: The inner side of the bottom frame (1) of the carton is slidably connected to a pull-out inner box (13), and the size of the space between the bottom frame (1) and the top panel (2) matches the size of the pull-out inner box (13).

3. A multi-layer protective cardboard box with a visual window according to claim 2, characterized in that: The pull-out inner box (13) has side openings (14) on both the left and right sides. A flexible block (15) is glued to the inside of the side opening (14) and the flexible block (15) is set on the center line of the side opening (14).

4. A multi-layer protective cardboard box with a visual window according to claim 1, characterized in that: The rectangular window (3) and the flared opening (4) are connected. The size of the PVC transparent sheet (5) is larger than that of the rectangular window (3). The PVC transparent sheet (5) and the adhesive layer (11) are bonded together. The PVC transparent sheet (5), the adhesive layer (11) and the color-changing sealing gasket (10) form a three-layer structure. The color-changing sealing gasket (10) and the lower insert frame (17) are bonded together.

5. A multi-layer protective cardboard box with a visual window according to claim 1, characterized in that: The lower insert frame (17) is a hollow triangular structure. The four central blocks (8) are fixedly connected together by four lightweight connecting columns (9). The bottom surface of the cover plate (7) and the top surface of the upper panel (2) are fitted together. The lightweight connecting columns (9) extend to the inside of the lower insert frame (17).

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