A segmented, easy-tear cylindrical packaging box
By introducing a spiral and horizontal pre-cut line design into the cylindrical packaging box, combined with the sealing of the film layer, the problems of large space occupation and inconvenience of carrying the cylindrical packaging box during use are solved. The volume can be reduced as the number of items decreases, thus improving the user experience and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG UNIV OF TECH
- Filing Date
- 2025-07-28
- Publication Date
- 2026-06-30
AI Technical Summary
Cylindrical packaging boxes take up a lot of space and are inconvenient to carry, especially when the number of items is reduced, as they cannot effectively reduce the size, which affects the user experience.
Design a segmented, easy-tear cylindrical packaging box with spiral and horizontal pre-cut lines on the inner wall of the can. By tearing these lines, the storage space is gradually reduced, and the contents are protected by a film layer. The volume of the can can be adjusted as needed to accommodate the reduction in the amount of contents.
It automatically shrinks in size as the number of items decreases, making it more convenient to use without affecting the safety and lifespan of the items, and providing a convenient carrying and usage experience.
Smart Images

Figure CN224428243U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a cylindrical packaging box, and more particularly to a segmented, easy-tear cylindrical packaging box. Background Technology
[0002] Currently, cylindrical packaging boxes consist of a hollow cylinder and a lid that can open or close the opening of the hollow cylinder. During use, due to the relatively long length and small opening of the hollow cylinder, it is impossible to directly reach inside to retrieve items; one can only use fingers to grasp items near the opening. To retrieve items further from the opening, one must tilt the cylinder to reach them. This type of cylindrical packaging box has the following disadvantages: 1. When multiple items are poured into the hand, one hand must hold them until all items are used up, which is especially inconvenient when the items are food; 2. As the contents of the cylinder decrease, the space occupied by the cylinder remains the same, making it inconvenient to carry and use. Utility Model Content
[0003] The purpose of this utility model is to solve the problems of existing cylindrical packaging boxes occupying a lot of space and being inconvenient to carry and use, and to provide a segmented easy-tear cylindrical packaging box that occupies less space as the items are reduced and is convenient to carry and use.
[0004] The objective of this utility model can be achieved by the following technical solutions:
[0005] A segmented, easy-tear cylindrical packaging box includes a can body and a lid that can open or close the can body opening. A thin film layer is provided on the inner wall of the can body, and a spiral pre-cut line is provided on the outer wall of the can body along the axial direction, the spiral pre-cut line penetrating the can body but not the thin film layer. A horizontal pre-cut line is provided on the outer wall of the can body in the radial direction. The can body and the thin film layer are material layers that can be manually torn. By tearing the can body and the thin film layer along the spiral pre-cut line, the storage space inside the can is gradually reduced. By tearing the can body and the thin film layer along the horizontal pre-cut line, the lid closes onto the can opening torn by the horizontal pre-cut line.
[0006] As a preferred embodiment, the spiral pre-cut lines and the horizontal pre-cut lines are holes arranged in a linear pattern.
[0007] As a preferred embodiment, the spiral pre-cut line comprises multiple sub-spirals, with adjacent sub-spirals rotating in opposite directions.
[0008] As a preferred embodiment, an annular groove or annular protrusion is provided below the horizontal pre-cut line and near the horizontal pre-cut line, and correspondingly, an annular protrusion or annular groove is provided on the inner wall of the cover.
[0009] As a preferred embodiment, the thin film layer is used to isolate and seal the article.
[0010] As a preferred embodiment, the thin film layer is composed of multiple composite thin films.
[0011] As a preferred option, the can body is made of recycled paper.
[0012] Implementing this utility model has the following beneficial effects:
[0013] 1. When using your hand to pick up items near the opening of the can, as the number of items decreases, it becomes difficult to reach items at the bottom. At this point, you can tear along the spiral pre-cut line at the opening to remove the empty storage space inside the can, thus reducing its volume and footprint. Furthermore, when tearing to the point near the bottom of the can, you can then gradually pick up the items without having to pour them directly into your other hand, freeing up your other hand for other tasks. This offers convenience and speed. The film layer also acts as an insulator and sealant, preventing direct contact with outside air despite the spiral and horizontal pre-cut lines, thus protecting the safety and lifespan of the contents. When tearing to the horizontal pre-cut line, you can easily tear along it to create a new horizontal opening. The lid can then be placed over this new opening to seal the can, achieving both a reduced volume and a secure seal.
[0014] 2. This utility model ingeniously adopts a design where the spiral directions of two adjacent sub-spirals are opposite, forming a structure where the forces required for tearing are opposite. This ensures the independence and mutual isolation of force transmission between the two sub-spirals, preventing the next sub-spiral from being torn along with the previous sub-spiral. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a structural schematic diagram of the segmented, easy-tear cylindrical packaging box of this utility model (the upper part is cut in half).
[0017] Figure 2 yes Figure 1 An enlarged view of the upper sectional view. 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] Example
[0020] Reference Figure 1 and Figure 2 This embodiment relates to a packaging tube, including a can body 1 and a lid 2 that can open or close the can opening 11 of the can body 1; a thin film layer 3 is provided on the inner wall of the can body 1, and a spiral pre-cut line 31 is provided on the outer wall of the can body 1 along the axial direction, the spiral pre-cut line 31 penetrates the can body 1 but does not penetrate the lid 2; a horizontal pre-cut line 32 is provided on the outer wall of the can body 1 in the radial direction; the can body 1 and the lid 2 are material layers that can be manually torn; by tearing the can body 1 and the lid 2 along the spiral pre-cut line 31, the storage space inside the can body 1 is gradually reduced; by tearing the can body 1 and the lid 2 along the horizontal pre-cut line 32, the lid 2 closes onto the can opening 11 torn by the horizontal pre-cut line 32.
[0021] When using your hand to pick up items near the opening 11 of the can 1, as the number of items decreases, your hand may not be able to reach the items at the bottom. At this point, you can tear open the can 1 starting from the spiral pre-cut line 31 at the opening 11, removing the empty storage space inside the can 1. This reduces the storage space, volume, and space occupied by the can 1. Furthermore, when you reach the item near the bottom of the can 1, you can gradually pick up the item with your hand again, without having to pour the item directly into your other hand. This frees up your other hand to do other things, offering convenience and speed. Additionally, because the lid 2 has an isolating and sealing function, even though the can 1 has spiral pre-cut lines 31 and horizontal pre-cut lines 32, it will not directly contact the outside air, thus preventing any impact on the safety and lifespan of the contents. When the tear reaches the horizontal pre-cut line 32, the horizontal pre-cut line 32 can be easily torn along the horizontal line to form a new horizontal can opening 11. At this time, the lid 2 can be placed on the new can opening 11 to seal the can body 1, thereby achieving the function and purpose of both reducing the volume of the can body 1 and sealing it.
[0022] The spiral pre-cut lines 31 and horizontal pre-cut lines 32 are linearly arranged holes. These holes penetrate the can body 1 but not the lid 2. The holes are evenly spaced, forming the spiral pre-cut lines 31 and horizontal pre-cut lines 32 respectively. When tearing, the can body 1 is gradually torn downwards from the opening 11 along the holes, continuously reducing the storage space inside the can body 1. This minimizes the extra space caused by the reduction in the number of items inside, making it convenient for carrying when traveling.
[0023] The spiral pre-cut line 31 comprises multiple sub-spirals, with adjacent sub-spirals rotating in opposite directions. As tearing occurs along the first sub-spiral 3111, the storage space within the tank 1 gradually decreases. When tearing reaches the junction of the first sub-spiral 3111 and the second sub-spiral 3112, because the rotation direction of the second sub-spiral 3112 is designed to be opposite to that of the first sub-spiral 3111, the force used to tear the first sub-spiral 3111 cannot tear the second sub-spiral 3112, ensuring the safety of the second sub-spiral 3112 and making it safer to use. At this point, if tearing the second sub-spiral 3112 is necessary, a force opposite to that used to tear the first sub-spiral 3111 must be applied to tear it. As can be seen, this structure cleverly adopts the design of two adjacent sub-spirals with opposite directions of rotation, forming two tearing forces that require opposite structures, ensuring the independence and mutual isolation of force transmission between the two sub-spirals, and preventing the next sub-spiral from being torn apart by the previous sub-spiral.
[0024] An annular groove 33 or an annular protrusion 34 is provided below the horizontal pre-cut line 32 and near the horizontal pre-cut line 32. Correspondingly, an annular protrusion 34 or an annular groove 33 is provided on the inner wall of the lid 2. By interlocking between the annular protrusion 34 and the annular groove 33, the lid 2 can be more tightly closed onto the new can opening 11 torn by the horizontal pre-cut line 32.
[0025] The lid 2 is composed of multiple layers of composite film. The number of layers in the lid 2 can be selected according to the type of items to be packaged. The lid 2 is a manually tearable material layer used to isolate and seal the items inside the container 1, preventing the items from directly contacting the outside air and providing better protection.
[0026] The can body 1 is made of recycled paper. The size of the can body 1 made of recycled paper can be adjusted and matched according to the specific purpose and needs of the packaging.
[0027] The above-disclosed embodiment is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.
Claims
1. A segmented, easy-tear cylindrical packaging box, characterized in that, The container includes a tank body and a lid that can open or close the tank opening. A thin film layer is provided on the inner wall of the tank body, and a spiral pre-cut line is provided on the outer wall of the tank body along the axial direction, the spiral pre-cut line penetrating the tank body but not the thin film layer. A horizontal pre-cut line is provided on the outer wall of the tank body in the radial direction. The tank body and the thin film layer are material layers that can be manually torn. By tearing the tank body and the thin film layer along the spiral pre-cut line, the storage space inside the tank is gradually reduced. By tearing the tank body and the thin film layer along the horizontal pre-cut line, the lid closes onto the tank opening torn by the horizontal pre-cut line.
2. The segmented, easy-tear cylindrical packaging box according to claim 1, characterized in that, The spiral pre-cut lines and horizontal pre-cut lines are holes arranged in a linear pattern.
3. A segmented, easy-tear cylindrical packaging box according to claim 1 or 2, characterized in that, The spiral pre-cut line comprises multiple sub-spirals, with adjacent sub-spirals rotating in opposite directions.
4. A segmented, easy-tear cylindrical packaging box according to claim 1 or 2, characterized in that, An annular groove or annular protrusion is provided below the horizontal pre-cut line and near the horizontal pre-cut line. Correspondingly, an annular protrusion or annular groove is provided on the inner wall of the cover.
5. A segmented, easy-tear cylindrical packaging box according to claim 1, characterized in that, The thin film layer is used to isolate and seal the items.
6. A segmented, easy-tear cylindrical packaging box according to claim 1 or 5, characterized in that, The thin film layer is composed of multiple composite thin films.
7. A segmented, easy-tear cylindrical packaging box according to claim 1, characterized in that, The can is made of recycled paper.