A waterproof backpack

Abstract

The utility model belongs to outdoor equipment technical field relates to a waterproof knapsack. The knapsack includes knapsack body, the knapsack body includes knapsack main storehouse, the front storehouse of being located knapsack main storehouse front part, the water bag storehouse of being located knapsack main storehouse rear part and the knapsack component of being sewn in knapsack body back, knapsack main storehouse, front storehouse and water bag storehouse all design as full open type structure, the both sides of knapsack main storehouse are provided with the auxiliary bag of being independent of each other, be provided with the loading area for storing the magazine in front storehouse, the knapsack body adopts waterproof flame -retardant fabric, and its hydrostatic pressure is greater than or equal to 200KPa. The utility model adopts waterproof flame -retardant fabric, and the afterburn time is less than or equal to 2s, the smoldering time is less than or equal to 2s, the damage length is less than or equal to 100mm, and there is no melting drop, and the safety is high, adopts high -strength chinlon filament fabric, and the wear resistance is greater than or equal to 20000 times, and the breaking strength warp is greater than or equal to 3000N, and the weft is greater than or equal to 2600N, can adapt to the severe environment.

Description

Technical Field

[0001] This utility model belongs to the field of outdoor equipment technology and relates to a waterproof backpack. Background Technology

[0002] In outdoor adventures and other scenarios, backpacks, as essential carrying equipment, need to meet the demands of various complex environments. Traditional assault backpacks are insufficient in terms of waterproofing, failing to meet the requirements for armed swimming and use in rain and snow, and lack buoyancy, limiting their use in water-crossing situations. Furthermore, the comfort and functionality of existing assault backpack carrying systems need improvement, making it difficult to achieve comfortable carrying over extended periods and rapid transitions between on-and-off combat.

[0003] While some waterproof assault backpacks exist abroad, they suffer from high prices and poor compatibility. Currently, domestically researched backpacks fall short of actual needs in terms of waterproofing, buoyancy, and flame retardancy. For example, existing assault backpacks primarily use high-strength nylon fabric, with only a coating process imparting some flame retardant and waterproof properties. Their structural design is highly limited, failing to adequately meet the demands of water-based use and unable to achieve effective buoyancy and waterproof sealing in water.

[0004] In addition, the manufacturing of existing assault backpacks still faces the following technical bottlenecks: First, there is a functional contradiction, with an imbalance between moisture permeability and waterproofing. High-strength waterproof layers (such as thick PU coatings) cause the moisture permeability to drop to 3000g / m³. 2 • Condensation is likely to form inside the backpack after prolonged carrying (less than 24 hours); secondly, there is a conflict between weight and protection, with fully waterproof backpacks weighing 2.5~3.2kg (compared to 1.8kg for a regular tactical pack), affecting individual soldier mobility; thirdly, there are limitations in the manufacturing process, such as weak seams, low-temperature embrittlement at ultrasonic bonding (tensile strength decreases by 35% at -20℃), easy cracking in extremely cold environments, and coating aging issues, with micro-cracks appearing in the PU coating after 200 bends, resulting in a 50% reduction in waterproof performance; fourthly, there are ergonomic defects, such as poor adaptability of the carrying system, the rigid waterproof back panel affecting spinal curvature, increasing lumbar spine pressure by 18% during rapid marches, resulting in low retrieval efficiency, and the multi-layered waterproof elastic zipper extending emergency retrieval time to 3 times that of a regular backpack (measured at ≥15s).

[0005] Therefore, developing an assault backpack with excellent waterproof performance, buoyancy function, comfortable carrying system and adaptability to various combat environments is of great practical significance. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a waterproof backpack to solve the problems of insufficient waterproof performance, low operational efficiency, lack of buoyancy function, and poor comfort of the carrying system in existing assault backpacks.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] On one hand, this utility model provides a waterproof backpack, including a backpack body, the backpack body including a main backpack compartment, a front compartment located at the front of the main backpack compartment, a hydration bladder compartment located at the rear of the main backpack compartment, and a carrying assembly sewn to the back of the backpack body; the main backpack compartment, the front compartment and the hydration bladder compartment are all designed to be fully openable, the main backpack compartment has independent auxiliary bags on both sides, and the front compartment has a loading area for storing magazines; the backpack body is made of waterproof and flame-retardant fabric with a hydrostatic pressure ≥200KPa.

[0009] Specifically, the carrying assembly includes a shaped back panel and breathable shoulder straps sewn onto the outside of the shaped back panel. The ends of the breathable shoulder straps are sewn onto the backpack body, and the shoulders of the breathable shoulder straps are provided with cushioning shoulder pads to improve carrying comfort.

[0010] Specifically, the breathable shoulder strap is provided with a human-shaped ventilation channel, and the two sides of the human-shaped ventilation channel are fixed with metal side bones.

[0011] Specifically, the chest buckle and waist buckle on the breathable shoulder strap are all of the form of snap fasteners, and the chest strap, waist strap and shoulder strap of the breathable shoulder strap can be quickly released through snap fasteners.

[0012] Specifically, the auxiliary package includes a mask compartment for assembling a gas mask.

[0013] Specifically, the interior of the mask compartment is supported by a PE board, and the opening is closed with Velcro and a double-stretch zipper structure.

[0014] Specifically, the auxiliary bag also includes at least two zippered auxiliary bags, each of which contains three separate zippered pockets.

[0015] Specifically, the backpack body has a stretchable layer on its side, which is opened and closed by a zipper to allow for different backpack capacities.

[0016] Specifically, the backpack body is made of 650D high-strength nylon filament camouflage canvas as the base, and a composite polyether thermoplastic polyurethane coating is applied on the camouflage canvas to achieve waterproof and flame-retardant properties.

[0017] On the other hand, this utility model also provides a method for preparing a waterproof backpack as described in part or all of the above, comprising the following steps:

[0018] Step 1, Fabric pretreatment: Coating the 650D high-strength nylon filament camouflage canvas to form a waterproof and flame-retardant fabric.

[0019] Step 2, Backpack Body Preparation: Prepare the corresponding backpack body according to the design requirements of the swimming bag style or the flame-retardant and waterproof fabric style;

[0020] Step 3, Processing of remaining components: Process the remaining components, which include the carrying assembly, auxiliary bag, and hydration bladder compartment; wherein, the shoulder straps and irregularly shaped back panel of the carrying assembly are sewn as required, and ventilation channels and metal side bones are provided;

[0021] Step 4: Assemble the waterproof backpack: Assemble the backpack body and the remaining parts;

[0022] Step 5, Waterproofing: Perform heat fusion treatment on the heat-sealed parts of the backpack to ensure that the heat seal strength is ≥120N.

[0023] Specifically, the top of the waterproof backpack is also sewn with a handle for easy dragging.

[0024] Specifically, the waterproof backpack provided by this utility model integrates a magnetic quick-access compartment on the shoulder strap of the breathable shoulder strap, specifically for storing first-aid supplies. In actual design, this magnetic quick-access compartment can be integrated on the front side of the right shoulder strap (for quick access with the left hand). The opening mechanism is: pull down the magnetic strap with one hand (the pulling force is designed to be 0.8N). Similarly, a pop-up medical compartment is provided at the top of the breathable shoulder strap. Specifically, pressing the button on the top of the backpack triggers a spring mechanism, which pops the medical bag up to a height of 5cm for easy retrieval.

[0025] Specifically, the shoulder strap incorporates a foam float module, which integrates a deployable side wing structure to automatically deploy and increase the support area upon impact with water. The foam float module employs a sandwich composite structure, specifically comprising:

[0026] Outer protective layer: It is made of 650D high-strength nylon + PVC flame-retardant film (afterflame time ≤1.5s); its surface treatment is as follows: laser-cut honeycomb hole array (pore diameter is 3mm, porosity is 28%).

[0027] Core buoyancy layer: Made of closed-cell EVA foam (density 0.03g / cm³), with a segmented independent air chamber design (4 longitudinal independent compartments), and each air chamber has a built-in silicone air duct (2mm inner diameter, connecting to the backpack's main airbag).

[0028] Inner bonding layer: 4mm thick slow rebound memory foam with embedded distributed pressure sensors (16 points / cm²).

[0029] The aforementioned foam float module is designed to be deeply integrated with the shoulder strap system, providing a buoyancy density of 15 N / m while maintaining the functionality of the tactical sling, meeting the requirements for armed swimming. Its key performance parameters and indicators are shown in Table 1 below:

[0030] Table 1

[0031]

[0032] It should be noted that the innovative design of the above-mentioned foam floating module is as follows:

[0033] 1) Self-inflating compensation system: Miniature CO2 gas tank (3g capacity), water pressure triggering mechanism (automatically starts when immersion depth > 10cm), emergency gas replenishment rate is 0.5L / s;

[0034] 2) Gradient density layout: front section: hardness 80A (load-bearing area), middle section: hardness 60A (flexible transition), rear section: hardness 40A (pressure relief area).

[0035] 3) Rapid separation mechanism: Electromagnetic locking device (unlocking force ≤ 5N), double-safety design to prevent accidental contact, separation response time < 0.2s;

[0036] 4) Ergonomic optimization: Bionic curved surface design, curvature radius matching the shape of the clavicle (R=80±5mm), 5° forward tilt design to reduce neck friction;

[0037] 5) Dynamic pressure regulation: The air pump linkage system automatically adjusts the hardness of the float based on sensor data, with a hardness adjustment range of 40A-80A;

[0038] 6) Heat and humidity management: The human-shaped ventilation duct is connected to the ventilation structure of the backpack system, and a phase change material layer (melting point 32℃) is embedded.

[0039] In addition, the aforementioned foam buoy module also provides safety protection in the following aspects:

[0040] 1) Redundant buoyancy protection: main buoy + 4 independent compensation airbags, with remaining buoyancy >110% in the event of damage to any compartment;

[0041] 2) Puncture-resistant design, Kevlar reinforcement layer (area density 200g / m³) 2 Self-healing coating (repair efficiency > 85%);

[0042] 3) Visual management, LED status indicator (red / yellow / green), Bluetooth connection to mobile APP to display buoyancy value.

[0043] Specifically, this waterproof backpack addresses the issues of shoulder pressure and back stuffiness caused by prolonged heavy carrying by primarily improving the following aspects:

[0044] (a) Dynamic fit of the shoulder strap assembly: 1. Structural composition: The main body of the shoulder strap is composed of a three-dimensional mesh and a significantly thickened (e.g., 25 mm thick) slow-rebound polyurethane foam (commonly known as memory foam) composite laminate. The articulated pivot mechanism is embedded in the middle section of the main body of the shoulder strap. The implementation methods include: Option A (bearing type), which uses a low-friction bearing structure (such as ball bearing or sliding bearing) to achieve multi-directional rotation; Option B (flexible material type), which uses materials with specific flexibility and deformation recovery capabilities (such as the slow-rebound polyurethane foam itself or its combination with other flexible materials) to form flexible hinge points.

[0045] The dynamic fit mechanism, or passive adjustment process, works as follows: the articulated pivot mechanism allows the middle section of the shoulder strap to rotate and swing freely in multiple directions relative to the fixed end (connected to the backpack body) and the movable end (connected to the chest) when the wearer's arm moves. This adjustment process requires no external power source (such as a motor) or sensor control, relying entirely on the passive dynamic response of the physical structure itself: the articulated pivot mechanism provides rotational freedom, and the thickened three-dimensional mesh composite slow-rebound polyurethane foam layer provides the necessary flexible support and elastic deformation capability, both supporting the pivot mechanism and conforming to the contour changes of the shoulder.

[0046] The aforementioned shoulder strap assembly structure is the result of the synergistic effect of the elastic support of the thickened flexible composite material and the multi-directional freedom of movement provided by the articulated pivot mechanism, specifically as follows: First, it reduces friction and pressure: The articulated pivot mechanism can effectively distribute the pressure points of the shoulder and significantly reduce the sliding friction and local pressure between the shoulder strap and the body (especially the acromion and clavicle area) during movement; Second, it improves freedom of movement and comfort: When the arm performs movements such as raising, extending, and moving laterally, the middle section of the shoulder strap automatically adjusts its angle through the pivot mechanism to avoid restricting the movement of the shoulder and arm, achieving dynamic adaptive fit between the shoulder strap and the shoulder.

[0047] (b) Floating lumbar support design: By integrating two sets of silicone air cushions (supporting inflation and deflation adjustment) on the inside of the waist belt, the silicone air cushions are connected to a miniature air pump located at the bottom of the backpack through a tube, and automatically alternately inflating and deflating to achieve lumbar massage when walking.

[0048] (c) Enhanced ventilation: The irregular back panel structure is upgraded to a "dual-channel airflow system". A honeycomb ventilation channel with a depth of 8mm is added below the ePTFE membrane on the back. In conjunction with the micro turbine fan (based on the original moisture permeation system), the airflow speed can be increased by 40%.

[0049] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0050] This waterproof backpack is made of waterproof and flame-retardant fabric with a fire-retardant time of ≤2s, a smoldering time of ≤2s, a damaged length of ≤100mm, no melting droplets, and high safety. It is made of high-strength nylon filament fabric with abrasion resistance of ≥20,000 cycles and a breaking strength of ≥3000N in the warp and ≥2600N in the weft, making it suitable for harsh environments. This waterproof backpack boasts excellent waterproof performance and a hydrostatic pressure of ≥200KPa, meeting the needs of armed swimming and rain / snow conditions, effectively protecting internal items. Through computer fluid dynamics simulation, the airbag layout is optimized, with the airbag and hydration bladder compartment featuring a spatially separated design: the hydration bladder compartment is located on the back of the backpack, independent of the airbag system, ensuring normal access to the hydration bladder. The two complement each other: the airbag provides buoyancy, while the hydration bladder compartment meets drinking needs, working together to enhance adaptability in water-related scenarios. Considering weight balance, the buoyancy center of the airbag and the hydration bladder compartment are offset, avoiding concentrated weight distribution and enhancing stability. 60% of the buoyancy is concentrated in the lower part of the backpack body, effectively preventing the body from tilting forward in the water and keeping the body upright.

[0051] Furthermore, the waterproof backpack provided by this utility model features a design for its carrying components, including breathable shoulder straps, a uniquely shaped back panel, and ergonomic ventilation channels, which helps reduce shoulder strain and improve comfort during extended carrying. The backpack's side panel has an elastic layer that can be opened and closed via a zipper, allowing for a capacity adjustment from 25L to 35L to meet the loading requirements of different combat missions. Attached Figure Description

[0052] The accompanying drawings are incorporated in and form part of this specification, and together with the description, serve to explain the principles of this invention.

[0053] 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, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 A front structural diagram of the waterproof backpack (swimming bag type) provided by this utility model;

[0055] Figure 2 is a side view of the waterproof backpack (flame-retardant and waterproof fabric version) provided by this utility model. Figure 2(a) shows one side view and Figure 2(b) shows the other side view.

[0056] Figure 3 A schematic diagram of the carrying components in the waterproof backpack provided by this utility model;

[0057] Figure 4 is a side view of the waterproof backpack with the side telescopic layer open and closed provided by this utility model. Figure 4(a) shows the telescopic layer closed and Figure 4(b) shows the telescopic layer open.

[0058] Figure 5 A detailed schematic diagram of the waterproof expansion layer zipper and heat-sealed parts provided by this utility model.

[0059] The backpack consists of: 1. Backpack body; 1-1. Main backpack compartment; 1-2. Front compartment; 1-3. Hydration bladder compartment; 2. Back support components; 2-1. Breathable shoulder straps; 2-2. Cushioned shoulder pads; 2-3. Chest strap; 2-4. Waist belt; 2-5. Shoulder straps; 3. Mask compartment; 4. Elastic layer; 4-1. Elastic layer zipper; 5. Handle. Detailed Implementation

[0060] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this invention. Rather, they are merely examples consistent with some aspects of this invention as detailed in the appended claims.

[0061] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0062] Example 1

[0063] See Figure 1 As shown in the diagram, this embodiment provides a front structural schematic of a waterproof backpack (swimming bag type). The backpack adopts a modular design. The swimming bag type waterproof backpack includes a backpack body 1 and a detachable swimming bag. The swimming bag is built into the backpack and connected by a movable hook. The swimming bag is made of waterproof and flame-retardant fabric and has a built-in manual press inflation device. The swimming bag has a built-in inflation valve, which can realize one-way manual press inflation.

[0064] Specifically, the backpack body 1 includes a main backpack compartment 1-1, a front compartment 1-2 located at the front of the main backpack compartment 1-1, a hydration bladder compartment 1-3 located at the rear of the main backpack compartment 1-1, and a carrying assembly 2 sewn onto the back of the backpack body 1. The main backpack compartment 1-1, the front compartment 1-2, and the hydration bladder compartment 1-3 are all designed as fully open structures. The main backpack compartment 1-1 has independent auxiliary pouches on both sides. The front compartment 1-2 has a loading area for storing magazines. The backpack body 1 is made of waterproof and flame-retardant fabric with a hydrostatic pressure ≥200KPa, providing waterproof sealing and buoyancy functions, and a maximum floating load capacity ≥15.5 kg, which helps improve safety and equipment applicability in water-related scenarios.

[0065] Furthermore, the carrying assembly 2 includes a shaped back panel and a breathable shoulder strap 2-1 sewn onto the outside of the shaped back panel. The two ends of the breathable shoulder strap 2-1 are sewn onto the backpack body 1, and the shoulder of the breathable shoulder strap 2-1 is provided with a cushioning shoulder pad 2-2 for improving carrying comfort.

[0066] Preferably, the shoulder strap 2-5 is also provided with a loading position. Specifically, a magnetic quick-access compartment is integrated into the shoulder strap 2-5 of the breathable shoulder strap 2-1, specifically for storing first aid supplies. In actual design, this magnetic quick-access compartment can be integrated into the front side of the right shoulder strap (for easy access by the left hand). The opening mechanism is: pull down the magnetic strap with one hand (the pulling force is designed to be 0.8N). Similarly, a pop-up medical compartment is provided at the top of the breathable shoulder strap 2-1. Specifically, pressing the button on the top of the backpack triggers a spring mechanism, which pops the medical bag up to a height of 5cm for easy retrieval.

[0067] In this embodiment, the shoulder straps 2-5 are adjustable in tightness, and the breathable back straps 2-1 are designed with human-shaped ventilation channels. The two sides of the human-shaped ventilation channels are fixed with metal side bones. The width of the breathable back straps 2-1 is 75±5mm, and the width between the two back straps is 75mm.

[0068] Furthermore, the chest buckle and waist buckle on the breathable shoulder strap 2-1 are both snap-on, and the chest strap 2-3, waist strap 2-4, and shoulder strap 2-5 of the breathable shoulder strap 2-1 can all be quickly released via snap-on fasteners. Preferably, the waist strap 2-4 uses a 38mm webbing with snap-on fasteners, and the breathable shoulder strap 2-1 is provided with an interface for attaching equipment.

[0069] Furthermore, the auxiliary pack includes three parts, one of which is a mask compartment 3 for assembling a gas mask. The interior of the mask compartment 3 is supported by a PE board, and the opening is closed with Velcro and a double zipper structure. The other two are auxiliary packs with zippers, and each auxiliary pack contains three independent zippered pockets.

[0070] Furthermore, the backpack body 1 is provided with a telescopic layer 4 on its side. The telescopic layer 4 is opened and closed by a telescopic layer zipper 4-1 to realize the capacity conversion of the backpack from 25L to 35L, so as to meet the loading requirements of different combat missions.

[0071] Furthermore, the top of the waterproof backpack is also sewn with a handle 5 for easy dragging.

[0072] In this embodiment, the backpack body 1 is made of 650D high-strength nylon filament camouflage canvas as the base, and a composite polyether thermoplastic polyurethane coating is provided on the camouflage canvas, so that the backpack has flame retardant properties, with afterflame time ≤2s, smoldering time ≤2s, damage length ≤100mm, and no dripping.

[0073] In this embodiment, the loading area set in the front compartment 1-2 can store 5 magazines, but the number of magazines loaded can be adjusted adaptively according to the size of the backpack body 1, the size of the magazines, and the number of magazines.

[0074] In addition, this embodiment also provides a method for manufacturing a waterproof backpack, including the following steps:

[0075] Step 1, Fabric Pretreatment: A coating treatment is applied to the 650D high-strength nylon filament camouflage canvas to form a waterproof and flame-retardant fabric. The specific process is as follows:

[0076] Step 1.1: Select 650D high-strength nylon filament camouflage canvas for pretreatment to remove impurities and oil stains;

[0077] Step 1.2: Using a casting process, thermoplastic polyurethane is coated onto printed woven fabric (camouflage canvas). Flame retardant is mixed into the polyurethane resin at a ratio of 10%. The flame retardant is then bonded to the fabric (camouflage canvas) through the polyurethane resin to form a waterproof and flame retardant fabric.

[0078] Step 2, Backpack Body 1 Preparation: Based on the design requirements of the swimming bag, prepare the corresponding backpack body. The specific process is as follows:

[0079] Step 2.1, Prepare the main compartment 1-1 of the backpack: Designed as a fully open backpack, with three independent auxiliary bags sewn on the outside, one auxiliary bag with a zipper sewn on the side, and three independent pockets with zippers sewn on the inside.

[0080] Step 2.2, Prepare the front compartment 1-2: Design it to accommodate 5 magazines;

[0081] Step 2.3: Prepare water bladder compartments 1-3: sew them onto the back of the backpack body 1 for easy loading and unloading;

[0082] Step 2.4, Prepare the side expansion layer 4: Use the same waterproof and flame-retardant fabric as the backpack body 1 and sew it onto the side. Combined with the expansion layer zipper 4-1, it can achieve a capacity conversion of 25L to 35L. See Figure 4.

[0083] Step 2.5: Prepare the gas mask bag: Sew an internal gas mask bag onto the side panel, insert a PE board for support inside, and install Velcro and double zipper structure at the opening.

[0084] Step 3, Processing of remaining components: Process the remaining components, including the carrying assembly 2, auxiliary bag, and hydration bladder compartments 1-3; wherein, the shoulder straps 2-5 and the irregularly shaped back panel of the carrying assembly 2 are sewn according to requirements, and ventilation channels and metal edge boning are provided; the specific processing procedure is as follows:

[0085] Step 3.1, Processing of Backpack Component 2:

[0086] Step 3.1.1, Breathable shoulder straps 2-5: Made of breathable material, sewn to both sides of the irregular back panel. A loading position is set in front of shoulder straps 2-5, and a shoulder strap 2-5 tightening system is installed to ensure that the width of shoulder straps 2-5 is 75±5mm.

[0087] Step 3.1.2, Irregular Back Panel: Design an irregular shape according to ergonomics, sew human-shaped ventilation channels on the back panel and fix it with metal side bones, and control the width between the two shoulder straps to 75mm;

[0088] Step 3.1.3: Make an emergency drag handle 5 using webbing at the upper part of the backpack body 1, with 80mm stitching in the middle and consistent edge spacing. See [reference needed]. Figure 5 ;

[0089] Step 3.1.4: Process the chest buckle, waist buckle and corresponding buckle straps. The chest strap 2-3 is fixed to the back strap with three beams and can be adjusted up and down.

[0090] Step 4: Assemble the waterproof backpack: Assemble the main body of the backpack and the remaining parts. The specific assembly process is as follows:

[0091] Step 4.1: Sew the main compartment, front compartment 1-2, and rear water bladder compartment 1-3 to the carrying component 2. Note that the stitch length is 9 stitches / 3cm to 11 stitches / 3cm, the sewing line is straight, and the beginning and end are backstitched.

[0092] Step 4.2: Install waterproof zippers: Install waterproof zippers on the main compartment, auxiliary bags, and other parts to ensure that the zippers are smooth and waterproof and sealed.

[0093] Step 4.3, Magazine Securing Design: An elastic band with Velcro is sewn inside the front pocket to secure the magazine;

[0094] Step 4.4: Install the telescopic layer 4: Sew the side telescopic layer 4 to the backpack body 1 to ensure smooth opening and closing and flexible capacity conversion.

[0095] Step 5, Waterproofing: Perform heat fusion treatment on the heat-sealed parts of the backpack to ensure that the heat seal strength is ≥120N;

[0096] Step 5.1: For the heat-sealed parts of the backpack, such as the joints of the stretch layer 4 and the area around the zipper of the waterproof stretch layer 4, use a high-frequency heat melt machine to heat seal them to ensure that the heat seal strength is ≥120N.

[0097] Step 5.2: Inspect the heat-sealed areas, see... Figure 5 The backpack must be free of loose threads, creases, bubbles, loose threads and fabric scraps, tears, and curling edges; it must be flat, sturdy, and ready for use to complete the production of a waterproof backpack.

[0098] In this embodiment, the formation process and function of the human-shaped ventilation duct are as follows:

[0099] First, the basic frame is sewn together: metal side boning is used for fixation to ensure structural stability and durability. The groove is designed in the middle of the shoulder strap, corresponding to the area that fits against the shoulder. The width is the same as the shoulder strap (75±5mm). Combined with the ergonomic design of the carrying system, the depth is not specifically limited, as long as it can form an effective airflow channel.

[0100] Second, dynamic adjustment: An "articular pivot" structure is embedded inside the tank, which can automatically adjust the angle with the arm movement, improving flexibility. In the optimized solution, a honeycomb ventilation slot (8mm deep) can also be added below the ePTFE membrane on the back panel, and work in conjunction with a micro turbine fan to increase airflow speed by 40%.

[0101] Third, its functions are reflected in the following aspects: ① Ventilation and heat dissipation: The channel structure guides airflow, reducing the feeling of stuffiness in the back. The honeycomb design increases the surface area and enhances air convection efficiency. Dynamic adaptability: The articulated hinge design allows the shoulder straps 2-5 to automatically adjust their angle with arm movements, reducing friction resistance. ② Improved comfort: It distributes shoulder pressure, reducing the pressure caused by prolonged carrying; the suspended lumbar support and ventilation channels work together to reduce lumbar spine pressure (improving the problem of 18% increase in lumbar spine pressure). ③ Environmental adaptability: In rainy, snowy, or water-wading scenarios, it quickly wicks away moisture, keeping the carrying system dry.

[0102] Fourth, Materials and Processes: Metal edge reinforcement ensures structural strength, while lightweight materials are used to balance weight. Intelligent Collaboration: In the optimized design, a micro-turbine fan and honeycomb channels work together to accelerate airflow and improve heat dissipation efficiency (50%). Ergonomics: The channel shape conforms to the curve of the human back, adapting to the dynamic needs of users of different body types.

[0103] Example 2

[0104] Based on Example 1, this example also provides a waterproof backpack (flame-retardant and waterproof fabric version), as shown in Figures 2-4. The flame-retardant and waterproof fabric version backpack is made of waterproof and flame-retardant fabric and is equipped with waterproof zippers to adapt to different task requirements.

[0105] In this embodiment, the waterproof and flame-retardant fabric adopts a five-layer protective structure design, specifically: an outermost protective layer, a middle waterproof functional layer, a seam treatment layer, a surface protective coating, and an emergency drainage system. In more detail:

[0106] (1) Outer protective layer (tear-resistant + water-repellent): Substrate: 1050D UHMWPE (ultra-high molecular weight polyethylene) blended with Kevlar, with a two-way tear strength ≥1800N. If UHMWPE blended nylon is selected, the abrasion resistance index is >8000 times (Martindale). Kevlar bulletproof yarn is embedded in the warp and weft directions. Surface treatment: Nano hydrophobic coating, contact angle 158°+5μm lotus leaf effect micro-convex structure to achieve superhydrophobicity. Self-healing coating: Microcapsule phase change coating, scratch depth ≤0.3mm, can be repaired within 2 hours to achieve self-healing. Protective enhancement design: Diamond grid pattern pressing, surface tension increased by 40%, reducing the risk of snagging; bulletproof patch / shrub puncture structure: Kevlar bulletproof yarn is embedded in the warp and weft directions, passing the shrub puncture test, which can effectively resist rock scratches and equipment friction.

[0107] (2) Core waterproof functional layer (molecular barrier) adopts a "sandwich" structure: ePTFE membrane (pore size 0.2μm) + polyester support mesh + TPU hot melt adhesive. The hot pressing temperature is precisely controlled (175±5℃) to avoid micropore collapse. The moisture permeability is >8000g / m² / 24h (35% higher than GORE-TEX). It still maintains flexibility in a low temperature environment of -40℃.

[0108] (3) Structural reinforcement layer (lightweight load-bearing): The frame material adopts carbon fiber + magnesium alloy honeycomb sandwich, with a specific strength 2.1 times that of titanium alloy; Bottom armor: injection-molded TPU + ceramic microbeads, with a rock impact absorption of >47J; Weight reduction design: shoulder strap 2-5 system gradient density EVA [80A-60A], which improves the uniformity of pressure distribution by 90%, and reduces the weight by 38% compared to traditional military packs (35L volume pack weighs only 1.2kg);

[0109] (4) Joint treatment layer (absolute sealing key), four-stage sealing process: ① Laser cutting, cut accuracy ±0.05mm, avoid burrs; ② Radio frequency welding, 20MHz high frequency welding, penetration depth 1.2mm; ③ Liquid sealant, such as liquid polyurethane adhesive with a joint width of 0.8mm and an elongation rate of >800%; ④ Pressure strip reinforcement, T-section silicone strip, compression set <5%;

[0110] (5) Emergency drainage system: flow channel: superhydrophobic graphene coating (contact angle 172°); drainage components: airbag is silicone aramid composite membrane (burst pressure > 380kPa), drainage valve is titanium alloy spring + fluororubber sealing ring (cycle life 5000 times); buoyancy performance, resists wave height of level 3 (0.5-1.25m) under 30kg load, stable floating for > 6 hours, floating height above water surface > 12cm.

[0111] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this utility model.

[0112] It should be understood that this utility model is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A waterproof backpack, comprising a backpack body (1), characterized in that, The backpack body (1) includes a main backpack compartment (1-1), a front compartment (1-2) located at the front of the main backpack compartment (1-1), a hydration bladder compartment (1-3) located at the rear of the main backpack compartment (1-1), and a carrying assembly (2) sewn onto the back of the backpack body (1). The main backpack compartment (1-1), the front compartment (1-2), and the hydration bladder compartment (1-3) are all designed to be fully openable. Independent auxiliary bags are provided on both sides of the main backpack compartment (1-1). The front compartment (1-2) contains... The backpack is equipped with a loading area for storing magazines; the backpack body (1) is made of waterproof and flame-retardant fabric with a hydrostatic pressure ≥200KPa; the top of the waterproof backpack is also sewn with a handle (5) for easy dragging; the carrying component (2) includes a shaped back panel and a breathable shoulder strap (2-1) sewn onto the outside of the shaped back panel, the ends of the breathable shoulder strap (2-1) are sewn onto the backpack body (1), and the shoulders of the breathable shoulder strap (2-1) are provided with cushioning shoulder pads (2-2) to improve carrying comfort.

2. The waterproof backpack according to claim 1, characterized in that, The chest buckle and waist buckle on the breathable shoulder strap (2-1) are all of the type of buckle, and the chest strap (2-3), waist strap (2-4), and shoulder strap (2-5) of the breathable shoulder strap (2-1) can be quickly released through buckles.

3. The waterproof backpack according to claim 1, characterized in that, The auxiliary package includes a mask compartment (3) for assembling a gas mask.

4. The waterproof backpack according to claim 3, characterized in that, The interior of the mask compartment (3) is supported by a PE board, and the opening is closed with Velcro and double zipper.

5. The waterproof backpack according to claim 3, characterized in that, The auxiliary bag also includes at least two zippered auxiliary bags, each of which contains three separate zippered pockets.

6. The waterproof backpack according to claim 1, characterized in that, The backpack body (1) has a telescopic layer (4) on its side. The telescopic layer (4) is opened and closed by a telescopic zipper (4-1) to achieve different backpack capacities.

7. The waterproof backpack according to claim 1, characterized in that, The backpack body (1) is made of 650D high-strength nylon filament camouflage canvas as the base, and a composite polyether thermoplastic polyurethane coating is provided on the camouflage canvas.

Images