A portable, extractable plastic bag

Abstract

This invention provides a portable pull-out plastic bag, comprising a material roll and a shell assembly. The material roll is formed by continuously stacking and winding several independent plastic bags, with a partially overlapping connection structure between adjacent plastic bags. The end of the preceding plastic bag overlaps the beginning of the following plastic bag by a predetermined length, and there is no additional adhesive or pressing structure in the overlapping area. The shell assembly is used to hold the material roll, and a pull-out hole is provided at the bottom of the shell assembly for the plastic bag to pass through the center of the material roll and be pulled outward. This invention, by setting the material roll from which the plastic bag extends along the central axis, and in conjunction with the pull-out hole at the center of the bottom surface of the shell assembly, allows the plastic bag to extend outward through the pull-out hole after the material roll is inserted into the shell. The user only needs to pull the plastic bag at the pull-out hole to retrieve it. Furthermore, the overlapping friction of adjacent plastic bags on the material roll can drive the next plastic bag to extend synchronously, eliminating the need for additional operations, simplifying the bag retrieval process, and improving ease of use.

Description

Technical Field

[0001] This utility model relates to the field of adhesive tape technology, specifically a portable pull-out adhesive bag. Background Technology

[0002] Plastic bags are used as convenient containers. They are usually made of plastic as the main material and are lightweight, waterproof, and low in cost. They can be used to carry items and isolate stains, and are a common tool in various scenarios.

[0003] Currently, most common plastic bag packaging on the market involves packing rolls or stacks of plastic bags into a special packaging box. To facilitate individual use, the bags are often connected by easy-tear lines or adhesive. When using the bags, users must pull them out from the opening in the packaging box and then manually tear along the easy-tear lines to separate individual bags, or pull forcefully to separate the glued bags. If the easy-tear lines are not completely broken, additional manual or tool-assisted separation is required. This cumbersome process is not only time-consuming but also prone to irregular tearing and edge damage, affecting the user experience. Furthermore, some packaging boxes have fixed structures, allowing only one method of bag retrieval. After use, the packaging boxes are often discarded directly, making reuse difficult. This increases costs, is not environmentally friendly, and fails to meet users' needs for efficient, convenient, and flexible bag retrieval. Utility Model Content

[0004] The purpose of this invention is to provide a portable pull-out plastic bag to solve the problems mentioned in the background art.

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

[0006] A portable pull-out plastic bag, comprising:

[0007] The material roll is formed by continuously stacking and winding several independent plastic bags. The connection structure between two adjacent plastic bags is partially overlapping. The end of the previous plastic bag overlaps the beginning of the next plastic bag by a preset length, and there is no additional adhesive or pressing structure in the overlapping area. The stacking state is maintained only by the winding tension, so that the plastic bags can be pulled out from the central axis of the material roll. When the current plastic bag is pulled out, its end drives the beginning of the next plastic bag to extend out of the material roll synchronously through the overlapping friction force. Continuous bag removal can be achieved without manual tearing or cutting.

[0008] The outer casing assembly is used to accommodate the roll of material, and the bottom of the outer casing assembly has an extraction hole for the plastic bag to pass through the center of the roll and be extracted outward.

[0009] Preferably, the outer shell assembly includes an outer shell I, which is a cylindrical structure with one open end and a cavity inside. The side of the outer shell I away from the open end is the top surface. A soft strap is fixedly connected to the middle of the upper end of the top surface. The end of the soft strap away from the top surface can be directly suspended from a carrier such as a hook or hanging rod for hoisting, or it can be connected and fixed to external objects such as backpacks, handbags, or wall hooks, thereby improving the portability and positional stability of the entire portable pull-out plastic bag.

[0010] Preferably, the outer shell assembly further includes outer shell II, which is a cylindrical structure with one open end and a cavity inside. The side of outer shell II away from the open end is the bottom surface, and a through extraction hole is provided at the center of the bottom surface. The diameter of the extraction hole is adapted to the unfolded width of the plastic bag, so that the plastic bag can be pulled out from the center of the roll. A through clearance hole is provided on the top side of outer shell II near the open end. A locking block is fixedly connected inside the clearance hole by an elastic element. The elastic element can deform with the movement of the locking block, thereby providing a reset force for the locking block, so that the connection and fixation of outer shell I and outer shell II can be achieved by the locking block.

[0011] Preferably, the cavity inside the outer shell II is used to insert the material roll. The plastic bag leading out from the center of the material roll is pulled outward. The tape passes through the extraction hole in the center of the bottom surface of the outer shell II. The open end of the outer shell II is inserted into the outer shell I with the open end facing the outer shell I. During the insertion process, the inner wall of the outer shell I will exert a squeezing force on the locking block, causing the locking block to move into the clearance hole and drive the elastic element to undergo compression deformation. When the outer shell II is inserted to the preset position, the slot opened on the inner wall of the top of the outer shell I corresponds to the position of the clearance hole. The compression deformation of the elastic element is released and a restoring elastic force is generated, pushing the locking block to move out of the clearance hole until the locking block is locked into the slot, thereby realizing the detachable fixation of the outer shell I and the outer shell II and preventing them from separating during use.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This utility model features a material roll that extends from the central axis to produce a plastic bag. With a extraction hole at the center of the bottom surface of the outer casing II, the plastic bag can extend outward through the extraction hole after the material roll is inserted into the casing. Users can simply pull the plastic bag at the extraction hole to retrieve it. Furthermore, the overlapping friction of adjacent plastic bags on the material roll can drive the next plastic bag to extend synchronously, eliminating the need for additional operations, simplifying the bag retrieval process, and improving ease of use.

[0014] This utility model features a detachable structure consisting of outer shell I and outer shell II. When outer shell II is inserted into outer shell I, the locking block is squeezed, compressing the elastic element. After it is in place, the elastic element resets and pushes the locking block into the slot to achieve fixation. When disassembling, pressing the locking block separates the two parts. This structure does not require complex parts, which not only simplifies the overall structure and reduces production and material costs, but also allows users to easily disassemble the outer shell to replace the material roll, further improving the convenience of use.

[0015] This utility model, by setting the outer shell I and the outer shell II as a matching cylindrical structure, the cavity of the outer shell I can form a radial limit on the inner shell II and the material roll, and the cavity of the outer shell II is completely matched with the shape of the material roll, which can prevent the material roll from shaking or rotating eccentrically during the use process, providing a stable holding space for the material roll and ensuring a smooth bag taking process.

[0016] This utility model features a soft strap fixedly connected to the top surface of the outer shell I. The soft strap can be suspended from carriers such as hooks and shopping cart rods. The outer shell can be laid flat or upright, allowing users to flexibly choose the placement method according to the usage scenario. In addition, the soft strap is made of a tensile-resistant and durable material, which greatly improves the portability and scenario adaptability of the entire device. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a three-dimensional schematic diagram of the outer shell I and outer shell II of this utility model;

[0019] Figure 3 This is a three-dimensional schematic diagram of the outer shell II of this utility model;

[0020] Figure 4 This utility model Figure 3 Another perspective 3D illustration;

[0021] Figure 5 This is a three-dimensional schematic diagram of the outer shell I of this utility model;

[0022] Figure 6 This is a three-dimensional cross-sectional view of the outer shell I and outer shell II of this utility model;

[0023] Figure 7 This is a three-dimensional schematic diagram of the material roll of this utility model.

[0024] In the diagram: 1. Outer shell I; 101. Flexible strip; 102. Slot; 103. Top surface; 2. Outer shell II; 201. Bottom surface; 202. Extraction hole; 203. Clearance hole; 204. Elastic element; 205. Locking block; 3. Plastic bag; 4. Material roll. Detailed Implementation

[0025] 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.

[0026] Example:

[0027] Please see Figures 1 to 7 This utility model provides a technical solution:

[0028] A portable pull-out plastic bag includes a material roll 4 and an outer shell assembly, enabling efficient bag retrieval and convenient use.

[0029] The material roll 4 is made from several independent plastic bags 3 through a continuous stacking and winding process. During the winding process, adjacent independent plastic bags 3 adopt a partially overlapping connection structure design (e.g., Figure 7 As shown, the end of the first plastic bag 3 overlaps the beginning of the second plastic bag 3 by a predetermined length along the width direction of the plastic bag 3. The overlap length is set to be at least 1 / 5 of the unfolded width of the plastic bag 3, and the overlapping area completely covers the plastic bag 3 along the width direction to ensure stable friction at the overlap. At the same time, there is no additional adhesive or pressing structure in the overlapping area. It only relies on the uniform tension formed during the winding process to maintain a tight overlap, which not only avoids the plastic bags 3 sticking together and causing difficulty in taking them out, but also enables the bag to be taken out in conjunction through the overlapping friction.

[0030] When in use, the plastic bag 3 can be pulled outward from the central axis of the roll 4. When an external force is applied to the current plastic bag 3 and pulled outward, the end of the current plastic bag 3, through the overlapping friction with the starting end of the next plastic bag 3, simultaneously drives the starting end of the next plastic bag 3 to extend out of the roll 4. Without manual tearing, cutting or other operations, the plastic bags 3 can be continuously used, which greatly improves the bag taking efficiency. Moreover, the edges of each plastic bag 3 remain intact, without damage or rough edges.

[0031] The outer shell assembly is used to accommodate and protect the material roll 4, and provides a stable installation position and convenient bag removal channel for the material roll 4. The whole assembly is composed of mutually compatible outer shell I1 and outer shell II2.

[0032] The outer shell I1 is a cylindrical structure with one open end, forming an internal cavity. The inner diameter of the cavity is slightly larger than the outer diameter of the outer shell II2. This ensures that the material roll 4 can be smoothly loaded and also provides radial restraint for the material roll 4, preventing it from shaking or rotating eccentrically during use. The side of the outer shell I1 away from the open end is a flat top surface 103. A soft strap 101 is fixedly connected to the middle of the upper end of the top surface 103 by integral injection molding or strong bonding. The soft strap 101 is made of polyester textile material or high-elasticity flexible plastic, which has good tensile strength and flexibility, and is not easy to break. It can be directly hung on household hooks, supermarket shopping cart rods, and backpack side hooks for hanging; it can also be connected and fixed to wall hooks or external objects such as tote bag rings through hanging holes. This not only avoids the contamination and damage caused by random placement of the material roll 4, but also allows for flexible positioning according to the usage scenario, significantly improving the portability and positional stability of the entire portable pull-out plastic bag 3.

[0033] On the top inner wall of the outer shell I1 near the opening end, there are symmetrical slots 102 that are adapted to the locking block 205 along the circumferential direction. The shape and size of the slots 102 are completely matched with the locking block 205, providing a positioning structure for the connection and fixation of the outer shell I1 and the outer shell II2.

[0034] The outer shell II2 also has a cylindrical structure with one open end, which is compatible with the open end of the outer shell I1 to achieve a tight fit. The cavity formed inside the outer shell II2 is perfectly matched with the shape and length of the material roll 4. The side of the outer shell II2 away from the open end is a closed bottom surface 201. A through extraction hole 202 is opened at the center of the bottom surface 201. The diameter of the extraction hole 202 is adapted to the unfolded width of the plastic bag 3, and the diameter is 1mm to 2mm larger than the unfolded width of the plastic bag 3. This ensures that the plastic bag 3 can pass through smoothly, while avoiding the plastic bag 3 from shaking or wrinkling inside the hole due to an excessively large diameter. At the same time, the inner wall of the extraction hole 202 has an arc-shaped transition surface with a radius of curvature of 1mm to 2mm. This can significantly reduce the frictional resistance between the plastic bag 3 and the hole wall when it is extracted, prevent the edge of the plastic bag 3 from being damaged or deformed due to friction, and extend the service life of the plastic bag 3.

[0035] On the top side of the outer shell II2 near the opening, there are symmetrical through-holes 203 along the circumferential direction. The positions of the through-holes 203 correspond to the positions of the slots 102 on the inner wall of the outer shell I1. An elastic element 204 is fixedly connected inside each through-hole 203 by welding or snap-fit. The elastic element 204 is made of high-rigidity elastic plastic, specifically modified polypropylene (PP) or reinforced polyamide (PA). One end of the elastic element 204 is fixedly connected to the inner wall of the through-hole 203, and the other end is fixedly connected to a locking block 205. The locking block 205 is hemispherical or rectangular in shape, made of the same material as the outer shell II2, and has a certain degree of hardness and wear resistance. The elastic element 204 can undergo compression or reset deformation as the locking block 205 moves, providing a stable reset force for the locking block 205.

[0036] In this embodiment, when assembling and installing the material roll 4, the material roll 4 is first inserted into the internal cavity of the outer shell II2 from the open end, ensuring that the material roll 4 is axially centered in the cavity; then the starting end of the outermost plastic bag 3 of the material roll 4 is pulled outward from the central axis of the material roll 4, and slowly passed through the extraction hole 202 in the center of the bottom surface 201 of the outer shell II2, so that the lead-out section of the plastic bag 3 extends out of the outer shell II2 for easy subsequent use.

[0037] After completing the installation of material roll 4 and the lead-out of plastic bag 3, slowly insert the open end of outer shell II2 into the cavity of outer shell I1 with the open end facing it. During the insertion process, the inner wall of outer shell I1 near the open end will contact the locking block 205 on outer shell II2 and exert a uniform squeezing force on the locking block 205, forcing the locking block 205 to move into the clearance hole 203. At the same time, it will cause the elastic element 204 to undergo compression deformation until outer shell II2 is fully inserted into the preset position of outer shell I1. At this time, the slot 102 on the inner wall of outer shell I1 is precisely aligned with the clearance hole 203 of outer shell II2. The compression deformation of the elastic element 204 is released, and a restoring elastic force is quickly generated, pushing the locking block 205 to move out of the clearance hole 203 until the locking block 205 is completely locked into the slot 102. This achieves a tight and detachable fixation between outer shell I1 and outer shell II2, effectively preventing accidental separation during carrying or bag removal. It also facilitates the subsequent replacement of material roll 4. When material roll 4 is used up, simply press the locking block 205 to retract it into the clearance hole 203, and outer shell II2 can be pulled out of outer shell I1. After replacing with a new material roll 4, it can be reassembled. The operation is convenient.

[0038] It should be noted that the outer shell I1 and outer shell II2 preferably use high-strength cardboard as the base material. The selected cardboard is preferably kraft paper or corrugated cardboard. This type of cardboard has good stiffness and bending resistance, which can provide stable support and protection for the internal roll 4, and prevent the outer shell from deforming due to compression and collision. At the same time, the cardboard material is lightweight, which can reduce the overall weight of the entire portable pull-out plastic bag 3 and improve the convenience of carrying.

[0039] To address the issue of cardboard being susceptible to moisture and its strength decreasing after getting wet, a waterproof membrane is applied to both the outer and inner surfaces of outer shell I1 and outer shell II2. This waterproof membrane is made of food-grade polyethylene (PE) film or polyvinyl chloride (PVC) waterproof film and is tightly bonded to the cardboard substrate through a hot-pressing composite process. This effectively blocks external moisture and humidity from intruding, preventing the cardboard from becoming damp and soft. It also prevents the inner plastic bag 3 from sticking to the cardboard due to moisture when in direct contact with it. At the same time, the smooth surface of the waterproof membrane reduces the frictional resistance between the plastic bag 3 and the inner wall of the outer shell when it is pulled out, ensuring a smooth bag removal process.

[0040] In use, users can choose the placement method according to their needs. The entire unit can be suspended from hooks, shopping cart rods, or backpack hooks using the soft strap 101 on the top surface 103 of the outer shell I1. It can also be laid flat on a table or countertop, or placed upright in a drawer or storage shelf, maintaining stability without additional fixation. To retrieve a bag, simply pinch the lead-out section of the plastic bag 3 extending from the extraction hole 202 on the bottom surface 201 of the outer shell II2 and gently pull it outwards. The current plastic bag 3 will be pulled out from the center of the roll 4, and simultaneously, the overlapping friction will cause the starting end of the next plastic bag 3 to extend out of the extraction hole 202. After the current plastic bag 3 is completely removed, no manual handling is required; the next plastic bag 3 is ready for use. The above actions can be repeated to achieve continuous retrieval one after another. The entire process requires no tearing, cutting, or opening of the outer shell. Whether suspended, laid flat, or upright, bags can be retrieved smoothly, making it suitable for various usage scenarios such as home, supermarket, and outdoor, greatly improving ease of use.

[0041] All other parts of this utility model not described herein are the same as existing technologies, or are known technologies, or can be implemented using existing technologies, and will not be described in detail here.

[0042] 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 portable pull-out plastic bag, characterized in that, include: Material roll (4), the material roll (4) is formed by a number of independent plastic bags (3) through continuous stacking and winding. The two adjacent plastic bags (3) adopt a partially overlapping connection structure. The end of the previous plastic bag (3) overlaps with the starting end of the next plastic bag (3) by a preset length. There is no additional bonding or pressing structure in the overlapping area. The stacking state is maintained only by the winding tension, so that the plastic bag (3) can be pulled out from the central axis of the material roll (4). When the current plastic bag (3) is pulled out, its end drives the starting end of the next plastic bag (3) to extend out of the material roll (4) synchronously through the stacking friction force. Continuous bag taking can be achieved without manual tearing or cutting. The outer casing assembly is used to accommodate the roll (4), and the bottom of the outer casing assembly has an extraction hole (202) for the plastic bag (3) to pass through the center of the roll (4) and be extracted outward.

2. The portable pull-out plastic bag according to claim 1, characterized in that: The outer shell assembly includes an outer shell I (1), which is a cylindrical structure with one end open and a cavity inside. The side of the outer shell I (1) away from the open end is the top surface (103). A soft strap (101) is fixedly connected to the middle of the upper end of the top surface (103). The end of the soft strap (101) away from the top surface (103) can be directly suspended on a hook or hanging rod carrier for hoisting, or it can be connected and fixed to external objects such as backpacks, handbags or wall hooks.

3. A portable pull-out plastic bag according to claim 2, characterized in that: The outer shell assembly also includes outer shell II (2), which is a cylindrical structure with one end open and a cavity inside. The side of outer shell II (2) away from the opening end is the bottom surface (201). A through extraction hole (202) is provided at the center of the bottom surface (201). The diameter of the extraction hole (202) is adapted to the unfolded width of the plastic bag (3) so that the plastic bag (3) can be pulled out from the center of the roll (4). A through clearance hole (203) is provided on the top side of outer shell II (2) near the opening end. A locking block (205) is fixedly connected inside the clearance hole (203) by an elastic element (204).

4. A portable pull-out plastic bag according to claim 3, characterized in that: The cavity inside the outer shell II (2) is used to insert the material roll (4). The plastic bag (3) leading out from the material roll (4) is pulled out from the center of the material roll (4). The tape passes through the extraction hole (202) in the center of the bottom surface (201) of the outer shell II (2). The end of the outer shell II (2) with the opening faces the opening end of the outer shell I (1) and is inserted into the outer shell I (1). The slot (102) opened on the top inner wall of the outer shell I (1) corresponds to the position of the clearance hole (203).

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