A waterproof knitted bag

Abstract

This utility model belongs to the field of knitted bag technology, specifically relating to a waterproof knitted bag, including a bag body comprising an inner layer and an outer layer, with a flexible waterproof membrane between the inner and outer layers. The flexible waterproof membrane includes multiple columnar air chambers, separators, and air channels. The multiple columnar air chambers are isolated from each other by the separators and connected by the air channels. The air channels are connected to an air intake device, which inflates the columnar air chambers to support the bag body. Through the above-mentioned components, the knitted bag not only achieves reliable waterproofing but also allows for free switching between a stiff and flexible state, while simultaneously providing protection for pressure-sensitive items.

Description

Technical Field

[0001] This utility model belongs to the field of knitted bag technology, specifically relating to a waterproof knitted bag. Background Technology

[0002] With the increasing demand for lightweight and comfortable bags, flyknit fabrics, which use a three-dimensional weaving process, are characterized by their light weight, excellent breathability, fine texture, and ergonomic fit. They are gradually replacing traditional canvas and nylon fabrics and are widely used in portable bags such as handbags and backpacks.

[0003] However, the inherent technical defects of flyknit fabric limit its application in various scenarios. Flyknit fabric is formed by interlacing yarns, and the presence of tiny pores between the yarns allows rainwater and splashed liquids to easily penetrate into the bag, causing damage to electronic devices, paper documents, and other items inside, resulting in insufficient waterproofing.

[0004] Flyknit fabric is soft but lacks crispness and has an irregular shape, making it unsuitable for various scenarios. When carrying fragile items (such as glassware and cosmetics) or items that need to be protected from pressure (such as camera lenses and digital accessories), the fabric cannot provide effective support. Under external pressure, the items inside the bag are easily deformed or damaged, making it difficult to meet the needs of protective loading. Utility Model Content

[0005] The purpose of this utility model is to provide a waterproof knitted bag, which aims to solve the technical problems of insufficient waterproofness, flexible support, and pressure resistance of existing handbags.

[0006] To achieve the above objectives, this utility model provides a waterproof knitted bag, comprising a bag body, the bag body including an inner layer and an outer layer, with a flexible waterproof membrane provided between the inner and outer layers. The flexible waterproof membrane includes multiple columnar air chambers, separators, and air channels. The multiple columnar air chambers are isolated from each other by the separators and connected by the air channels. The air channels are connected to an air inlet device, which inflates the columnar air chambers to support the bag body.

[0007] Preferably, the flexible waterproof membrane is integrally formed around the perimeter and bottom of the package.

[0008] Preferably, the plurality of columnar air chambers are evenly distributed in an array, and the columnar air chambers can be repeatedly filled and deflated to switch between the package support state and the normal state.

[0009] Preferably, the columnar air chambers located around the perimeter of the package extend vertically along the height of the package, and the columnar air chambers located at the bottom of the package extend laterally along the width of the package.

[0010] Preferably, the flexible waterproof membrane is made of a co-extruded film of polyamide (PA) and polyethylene (PE) that has waterproof and fatigue-resistant properties.

[0011] Preferably, the airway is further connected to an air outlet bladder, which includes a bladder body. One end of the bladder body is connected to the airway, and the other end is provided with an exhaust port. The exhaust port is provided with a one-way valve, which only allows the air inside the bladder body to be discharged to the outside while preventing outside air from entering the bladder body. A switch for controlling the exhaust is provided outside the exhaust port. By opening the switch and pressing the air outlet bladder, the air in the columnar air chamber can be completely discharged.

[0012] Preferably, the air intake device is an air intake bladder, which includes an air bladder body and a one-way valve. One end of the air bladder body is connected to the air passage, and the other end is provided with an air inlet. The one-way valve is provided in the air inlet. The one-way valve only allows outside air to enter the air bladder body and prevents the air inside the air bladder body from being discharged from the air inlet. The air bladder body can be inflated into the columnar air chamber by pressing it.

[0013] Preferably, the inner layer and the outer layer are connected by a detachable connection structure such as a zipper or buckle, so as to facilitate the disassembly, replacement or cleaning of the flexible waterproof membrane.

[0014] Preferably, the separator is fixedly connected to the package body to prevent the flexible waterproof membrane from shifting or folding inside the package body.

[0015] Preferably, the separator strip and the package body are detachably fixed by a release adhesive sheet.

[0016] The waterproof knitted bag provided in this embodiment of the utility model has at least one of the following technical effects: This utility model discloses a waterproof knitted bag that effectively blocks rainwater, splashed liquids, and daily moisture from penetrating into the bag through a flexible waterproof membrane design, preventing electronic devices, paper documents, clothing, and other items inside the bag from being damaged by moisture.

[0017] This utility model discloses a waterproof knitted bag. Through the structural design of the flexible waterproof membrane, the columnar air chambers of the membrane expand into a supporting structure after inflation, keeping the bag in a sturdy and regular shape, facilitating the aesthetic appearance when carrying items. After deflation, the flexible waterproof membrane returns to a flat film, and the bag returns to a soft state, allowing for flexible adjustment according to usage scenarios to suit different needs such as daily commuting and outdoor travel. At the same time, the columnar air chambers form an elastic buffer layer after inflation. When the bag is subjected to external pressure or collision, the air chambers can disperse the impact force through their own deformation, providing effective protection for fragile items (such as glassware and cosmetics) and precision components (such as camera lenses and digital devices) inside the bag, reducing the risk of damage to items due to external forces. Compared with traditional unsupported knitted bags, the protective capability is significantly improved.

[0018] This utility model discloses a waterproof knitted bag in which the inflation and deflation of the gas-driven device are achieved by manually pressing the air bladder. It does not require external air pumps, air extraction equipment or other tools. Users can operate it at any time, whether indoors or outdoors. It is highly convenient to use, lowers the threshold for use, and is suitable for the operating habits of users of different ages.

[0019] This utility model discloses a waterproof knitted bag. The entire structure is designed with knitted fabric as the inner and outer layers, without the addition of hard padding, thick coatings, or other components. The weight of the bag is not increased due to the interlayer, ensuring user comfort. At the same time, the active air intake design of the air bladder can completely expel residual air from the columnar air chamber, avoiding the air residue problem caused by the columnar air chamber relying on natural compression. This maximizes the preservation of the lightweight characteristics of the knitted fabric, such as its small folded size, making it easy to store in suitcases, lockers, etc., saving storage space, and making it especially suitable for travel. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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.

[0021] Figure 1 A perspective view of a waterproof knitted bag provided for an embodiment of this utility model.

[0022] Figure 2 This is a perspective view of a waterproof knitted bag with the outer layer omitted, provided as an embodiment of the present utility model.

[0023] The following are the labeling elements in the figure: 10—Packaging body 11—Outer layer 12—Inner layer 13—Handle 20—Flexible waterproof membrane 21—Columnar air chamber; 22—Separator strip; 23—Air passage; 30—Gas drive device 31—Intake airbag; 32—Exhaust airbag. Detailed Implementation

[0024] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0025] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0028] In one embodiment of this utility model, such as Figure 1 , 2 As shown, a waterproof knitted bag is provided, including a bag body 10, a flexible waterproof membrane 20, and a gas-driven device 30.

[0029] The bag body 10 is made of double-layer knitted fabric. The outer layer 11 is the outer surface of the bag body 10, and the inner layer 12 is the inner layer. A gap is provided between the outer layer 11 and the inner layer 12. The bag body 10 is also provided with a handle 13. The flexible waterproof membrane 20 is disposed in the gap between the two layers of fabric of the bag body 10. The flexible waterproof membrane 20 has waterproof properties and can be inflated to support the bag body 10. The gas driving device 30 is connected to the flexible waterproof membrane 20 to inflate and deflate the flexible waterproof membrane 20.

[0030] The outer layer 11 and the inner layer 12 are stitched together at the bottom and connected at the top by a detachable connection structure such as a zipper or buckle. The design of the detachable connection structure allows the flexible waterproof membrane 21 to be easily removed for replacement or cleaning by opening the zipper or unfastening the buckle, thus improving the maintenance convenience of the bag.

[0031] The flexible waterproof membrane 20 is made of polyamide (PA) and polyethylene (PE) co-extruded film, which has waterproof and fatigue-resistant properties. It has excellent fatigue resistance and wear resistance, can withstand the deformation pressure of repeated inflation and deflation, and is not prone to cracking or leakage after long-term use.

[0032] The flexible waterproof membrane 20 completely fills the gap between the inner layer 12 and the outer layer 11, and is adapted to the shape of the package 10, covering the sides and bottom of the package 10. The flexible waterproof membrane 20 is fixed to the inner side of the inner layer 12 by TPU double-sided adhesive film.

[0033] The flexible waterproof membrane 20 includes columnar air chambers 21 arranged in a uniform array, separator strips 22, and air channels 23. The structure of the flexible waterproof membrane 20 is similar to that of the air column bag roll material.

[0034] When deflated, the columnar air chambers 21 are compressed into layers, maintaining the softness of the package 10. When inflated, they expand to form columnar support structures, applying outward support to the inner layer 12 and outer layer 11, keeping the package 10 in a sturdy shape. Simultaneously, the expanded columnar air chambers 21 act as elastic buffer layers. Multiple columnar air chambers 21 are provided. Those located around the package 10 extend vertically along the height of the package 10, ensuring even coverage of the support force around the package 10 and preventing localized collapse. Those located at the bottom of the package 10 extend laterally along the width of the package 10. As elastic buffer layers, the columnar air chambers 21 disperse external impacts when the package 10 is subjected to compression or collision, protecting fragile items inside.

[0035] like Figure 2 As shown, the separator 22 is a unit for dividing and fixing the columnar air chambers 21 on the flexible waterproof membrane 20, and the separator is formed on the flexible waterproof membrane 20 by heat sealing process. The separator strip 22 is arranged parallel to and adjacent to the columnar air chambers 21, dividing the flexible waterproof membrane 20 into multiple independent columnar air chambers 21. Simultaneously, one end of the separator strip 22 near the top of the package 10 protrudes from the columnar air chamber 21. The separator strip 22 and the package 10 are detachably fixed together by a release adhesive film to prevent displacement or folding of the flexible waterproof membrane 20 within the package. This release adhesive film is made of TPU double-sided adhesive and is pasted onto the separator layer 22, thus fixing the flexible waterproof membrane layer 20 to the package 10. Two to three TPU double-sided adhesive films are evenly distributed on the same side of the flexible waterproof membrane 20, and TPU double-sided adhesive films are also distributed near the top of the separator layer 22 to ensure the connection strength between the flexible waterproof membrane 20 and the package 10, while avoiding affecting the inflation and expansion of the columnar air chambers 21.

[0036] The separator strip 22 evenly divides the columnar air chambers 21 to ensure that each row of columnar air chambers 21 is independent and evenly distributed, avoiding uneven support of the columnar air chambers 21 on the package body 10 after inflation; at the same time, it fixes the flexible waterproof membrane 20 to prevent the flexible waterproof membrane 20 from shifting or folding in the interlayer during use, which would affect the waterproof and support effect. The release adhesive sheet fixation method takes into account both the reliability of fixation and the convenience of disassembly, and can be easily peeled off when replacing the flexible waterproof membrane 20 in the future.

[0037] The air duct 23 and the flexible waterproof membrane 20 are an integral structure. Through a heat sealing process, a long strip-shaped sealed channel is formed around the flexible waterproof membrane 20 near the bottom of the package 10. This channel is connected to all the columnar air chambers 21 located around the package 10 and all the columnar air chambers 21 located at the bottom of the package 10. The air duct 23 is a gas delivery channel. When the package 10 needs to be stiff, the air duct 23 distributes external gas to all the columnar air chambers 21. When the package 10 needs to be softened, the air duct 23 discharges the gas from all the columnar air chambers 21.

[0038] Through the structural design of the flexible waterproof membrane 20, the columnar air chambers 21 expand into a supporting structure after inflation, keeping the bag body 10 in a firm and regular shape, making it easy to maintain an aesthetically pleasing appearance when loading items. After deflation, the flexible waterproof membrane 20 returns to a flat film, and the bag body 10 returns to a soft state, which can be flexibly adjusted according to the usage scenario to adapt to different needs such as daily commuting and outdoor travel. At the same time, the inflated columnar air chambers 21 form an elastic buffer layer. When the bag body 10 is subjected to external pressure or collision, the columnar air chambers 21 can disperse the impact force through their own deformation, providing effective protection for fragile items (such as glass products and cosmetics) and precision accessories (such as camera lenses and digital devices) inside the bag, reducing the risk of items being damaged by external forces. The protective capability is significantly improved compared to traditional unsupported knitted bags.

[0039] The gas drive device 30 provides the power for inflation and deflation of the columnar air chamber 21, enabling the switching between a stiff and soft state; no additional external air pump or air extraction equipment is required, and users can complete the inflation and deflation by manual operation, improving the ease of use. The gas drive device 30 includes an inlet air chamber 31 and an outlet air chamber 32.

[0040] The air intake bladder 31 is fixed to the outside of the package body 10. The air intake bladder 31 is the inflation unit of the columnar air chambers 21, including the bladder body and a one-way valve. One end of the bladder body is connected to the air passage 23 through an air tube, and the other end is provided with an air inlet. The one-way valve is embedded in the air inlet. The one-way valve only allows outside air to enter the bladder body through the air inlet and prevents the air inside the bladder body from being discharged from the air inlet. When the user presses the bladder body, the air inside the bladder body is pressurized and enters the air passage 23 through the sealing joint, and is then distributed to each columnar air chamber 21. When the user releases the pressure, the bladder body returns to its original position, and outside air is drawn into the bladder body through the air inlet via the one-way valve. The one-way conduction characteristic of the one-way valve ensures that there is no air leakage during inflation. The press-type operation does not require complicated tools, and users can inflate the bladder anytime and anywhere, making it suitable for various scenarios such as daily commuting and outdoor travel.

[0041] The air bladder 32 is fixed to the other side of the outer side of the package 10. The air bladder 32 is the exhaust unit of the columnar air chamber 21. It includes the air bladder body, the one-way valve and the exhaust switch. One end of the air bladder body of the air bladder 32 is connected to the airway 23 through the air tube, and the other end is provided with an exhaust port. The one-way valve of the air bladder 32 is embedded in the exhaust port. The one-way valve of the air bladder 32 only allows the air in the air bladder body of the air bladder 32 to be discharged through the exhaust port, preventing outside air from entering the air bladder body. The exhaust switch is covered on the outside of the exhaust port. Rotating the exhaust switch can open the exhaust port. After the user opens the exhaust switch, pressing the airbag body creates negative pressure within it, drawing air out of the columnar air chamber 21 through the air tube 23. Releasing the switch returns the airbag body to its original position, preventing outside air from entering. Air from the columnar air chamber 21 then enters the airbag body under the negative pressure. Pressing the switch again expels the air through the exhaust port. This process is repeated until all air is expelled from the columnar air chamber 21. The coordination of the one-way valve, airbag body, and exhaust switch ensures complete air removal from the columnar air chamber 21. Furthermore, the manual pressing operation requires no external tools, making the exhaust process highly efficient.

[0042] Different pendants and dolls can be attached to the air intake airbag 31 and the air exhaust airbag 32 to cover the airbag, so that the airbag is aesthetically pleasing and the knitted bag is more fun.

[0043] The inflation and deflation of the gas-driven device 30 are achieved by manually pressing the air bladder, eliminating the need for external air pumps or suction equipment. Users can operate it anytime, anywhere, whether indoors or outdoors, making it highly convenient, lowering the barrier to entry, and adapting to the operating habits of users of different ages. The working principle of this utility model is as follows: A waterproof knitted bag, the setting of the stiff state: confirm that the exhaust port switch of the air bladder 32 is in the closed state to prevent gas leakage during inflation; repeatedly press the body of the air inlet bladder 31 and observe the shape change of the bag body 10; when the bag body 10 reaches the stiff state, press the side of the bag body 10 by hand and there is no obvious collapse, stop pressing the air inlet bladder 31, and the stiff state setting is completed.

[0044] Setting the soft state: Open the exhaust port switch of the air bladder 32; repeatedly press the body of the air bladder 32 and observe the bag 10 gradually becoming soft; when no obvious air is expelled when the bag 10 is squeezed by hand, it means that the air in the air chamber 21 has been expelled. Close the exhaust port switch, and the soft state setting is complete.

[0045] If the flexible waterproof membrane 20 is damaged or needs cleaning, unzip the zipper between the outer layer 11 and the inner layer 12; peel off the release adhesive strip of the separator layer 22 from the inner layer 12, and remove the flexible waterproof membrane 20; replace it with a new flexible waterproof membrane 20, or clean and dry it, fix the separator layer 22 to the inner layer 12 in its original position with the release adhesive strip, close the zipper, and the maintenance is complete.

[0046] For daily commutes, it can be set to a sturdy state, making it easy to load items and keeping the appearance neat. When going out outdoors or storing items, it can be set to a soft state, giving the bag a more casual look. At the same time, it is compact when folded, making it easy to put into a suitcase or locker. The flexible waterproof membrane design effectively prevents rainwater, splashed liquids, and daily moisture from penetrating into the bag, avoiding damage to electronic devices, paper documents, clothing, and other items inside the bag due to moisture.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waterproof flyaway bag, characterized by: The package includes an inner layer and an outer layer, with a flexible waterproof membrane between the inner and outer layers. The flexible waterproof membrane includes multiple columnar air chambers, partition strips, and air channels. The multiple columnar air chambers are isolated from each other by the partition strips and connected by the air channels. The air channels are connected to an air intake device, which inflates the columnar air chambers to support the package.

2. A waterproof knitted bag according to claim 1, characterized in that: The flexible waterproof membrane is integrally formed around the perimeter and bottom of the package.

3. A waterproof knitted bag according to claim 1, characterized in that: The multiple columnar air chambers are evenly distributed in an array, and the columnar air chambers can be repeatedly filled and deflated to switch between the supported state and the normal state of the package.

4. A waterproof knitted bag according to claim 2, characterized in that: The columnar air chambers located around the perimeter of the package extend vertically along the height of the package, while the columnar air chambers located at the bottom of the package extend laterally along the width of the package.

5. A waterproof knitted bag according to claim 1, characterized in that: The airway is also connected to an air outlet airbag, which includes an airbag body. One end of the airbag body is connected to the airway, and the other end is provided with an exhaust port. The exhaust port is provided with a one-way valve, which only allows the air inside the airbag body to be discharged to the outside while preventing outside air from entering the airbag body. A switch for controlling the exhaust is provided outside the exhaust port. By opening the switch and pressing the air outlet airbag, the air in the columnar air chamber can be completely discharged.

6. A waterproof knitted bag according to claim 1, characterized in that: The air intake device is an air intake bladder, which includes an air bladder body and a one-way valve. One end of the air bladder body is connected to the air passage, and the other end is provided with an air inlet. The one-way valve is provided in the air inlet. The one-way valve only allows outside air to enter the air bladder body and prevents the air inside the air bladder body from being discharged from the air inlet. The air bladder body can be inflated into the columnar air chamber by pressing the air bladder body.

7. A waterproof knitted bag according to claim 1, characterized in that: The inner and outer layers are connected by a detachable connection structure via zippers or buckles, which facilitates the removal, replacement, or cleaning of the flexible waterproof membrane.

8. A waterproof knitted bag according to claim 1, characterized in that: The separator strip is fixedly connected to the package body to prevent the flexible waterproof membrane from shifting or folding inside the package body.

9. A waterproof knitted bag according to claim 8, characterized in that: The separator strip and the package body are detachably and fixedly connected by a release adhesive sheet.

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