Portable bag with multifunctional multiplex structure

Abstract

The utility model discloses a portable bag with multifunctional multiplex structure relates to article storage device. The portable bag includes the bag body, shoulder belt and the rope opening and closing structure. The shoulder belt is cloth material quality, and both ends are fixedly connected with the bag body main bag mouth two sides, and no metal or plastic adjusting fastener. Through the overall structure configuration, the shoulder belt can be completely stored into the bag body inside through the rope opening and closing structure without disassembly, and the bottom of the bag body is laid and forms the buffer protection layer, and the rope opening and closing structure can close the bag body. The utility model realizes the function multiplex of the shoulder belt from the bearing to the built-in buffer protection layer, has lightweight, quick access and good protective property simultaneously, especially suitable for storing the precision equipment such as camera.

Description

Technical Field

[0001] This utility model belongs to the technical field of item storage and carrying devices, specifically relating to a portable bag that achieves functional reuse of key components and flexible conversion between multiple usage modes through an innovative overall structural design. This portable bag is suitable for items requiring cushioning and protection, as well as convenient carrying, such as cameras, drones, lenses, precision instruments, or valuable tools, and is particularly suitable for camera equipment. Background Technology

[0002] For users who frequently need to carry and access precision equipment, tools, or other fragile items, existing storage bag products often face multiple contradictions in terms of structure and function, making it difficult to achieve a balance between core needs such as lightweight design, quick access, comfortable carrying, and comprehensive protection.

[0003] Taking photography as a typical application scenario: Currently, photographic equipment is continuously developing towards lightweight design. The weight of some full-frame cameras combined with standard zoom lenses has been significantly reduced, making it possible for photography enthusiasts to travel light. However, existing camera bag designs still have many shortcomings: professional backpacks often contain rigid frames and complex layered structures, resulting in a relatively large empty bag weight, severely offsetting the portability advantages brought by lightweight equipment; the combination of an inner bag and a regular backpack requires two opening and closing operations when accessing the equipment, which is cumbersome and can easily delay opportunities for quick shots; single-shoulder bags can easily cause unilateral muscle fatigue during prolonged use, resulting in poor comfort. In addition, some products rely on metal connectors that pose a risk of scratching the equipment, while plastic connectors may lack sufficient strength. Furthermore, when small items are mixed with the main unit, the lack of effective internal insulation makes them prone to bumping and knocking.

[0004] The aforementioned problems are not unique to the photography field. In many other fields, such as outdoor adventure, professional repair, and scientific research, users urgently need an innovative storage solution that integrates portability, rapid response, ergonomic carrying experience, and reliable protection when carrying precision instruments, valuable tools, or fragile equipment. The market urgently needs a product that can fundamentally solve these common pain points. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing storage bags in balancing lightweight design, quick access, comfortable carrying, and comprehensive protection. It provides a portable bag with a multi-functional, reusable structure, particularly suitable for use as a camera bag. Through an innovative overall layout and connection design of the bag body 1, shoulder strap 2, and drawstring closure structure 3, this portable bag achieves complete internal storage and functional reuse of the shoulder strap 2 without requiring any detachable connectors. It also allows for quick and seamless switching between usage modes, thus integrating extreme lightweight design, high operational efficiency, carrying safety, and multiple layers of protection.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A portable bag with a multifunctional reusable structure is characterized by comprising a bag body 1, a shoulder strap 2, and a drawstring opening and closing structure 3.

[0007] The bag body 1 has a main pocket opening at its top. The drawstring opening and closing structure 3 is arranged around the main pocket opening for opening and closing the bag body 1. The shoulder strap 2 has a first end 2a fixedly connected to a first side 1a of the bag body forming the main pocket opening, and a second end 2b fixedly connected to a second side 1b of the bag body forming the main pocket opening; wherein, the shoulder strap 2 is made of fabric and does not include metal or plastic adjusting buckles for adjusting the effective length of the shoulder strap; the fixed connection is a non-detachable connection, that is, it does not include detachable connecting parts such as buckles, hooks, or snaps, and is preferably directly and fixedly connected by sewing.

[0008] The positions and connections of the bag body 1, shoulder strap 2, and drawstring closure structure 3 are coordinated such that the shoulder strap 2 can be selectively and completely stored inside the bag body 1 through the drawstring closure structure 3 without disassembling any parts, and can be laid at the bottom of the bag body 1 to form a cushioning protective layer, while simultaneously closing the bag body 1 through the same drawstring closure structure 3.

[0009] When the shoulder strap 2 is stored inside the bag body 1, it can be laid in multiple layers at the bottom of the bag body 1 to form the cushioning and protective layer.

[0010] Further, the shoulder strap 2 comprises a main strap section 21 and an adjusting strap section 22. The first end of the main strap section 21 is the first end 2a of the shoulder strap 2, and the second end of the adjusting strap section 22 is the second end 2b of the shoulder strap 2. The adjusting strap section 22 comprises a first U-shaped strap 221 and a second U-shaped strap 222. Both the first U-shaped strap 221 and the second U-shaped strap 222 have a fixed end and a movable loop extending from the fixed end. The fixed end of the first U-shaped strap 221 is fixedly connected to the second end of the main strap section 21, and the fixed end of the second U-shaped strap 222 is fixedly connected to the second side position 1b that forms the main pocket opening. The movable loops of the first U-shaped strap 221 and the second U-shaped strap 222 interweave and can adjust the effective length of the shoulder strap 2 by tying at least one of the movable loops together.

[0011] In a preferred adjustment scheme, the movable loop of the first U-shaped strap 221 is longer than the movable loop of the second U-shaped strap 222, and the length of the movable loop of the second U-shaped strap 222 is configured such that it is only possible for the movable loop of the first U-shaped strap 221 to pass through, and is not suitable for effectively adjusting the length of the shoulder strap 2 by tying itself.

[0012] To ensure connection strength, all load-bearing connection points are directly and securely connected by sewing. Preferably, the connection end is inserted into the bag body 1 or the adjacent strap to a depth of at least 1 cm, and multiple reinforcing stitches are sewn on.

[0013] Optionally, the carrying bag also includes two carrying straps 41 and 42, which are fixedly connected to the front position 1c and the back position 1d of the bag body that constitute the main bag opening, respectively, and are located outside the drawstring opening structure 3 to provide additional carrying function.

[0014] Furthermore, the drawstring opening and closing structure 3 includes drawstring channels 311 and 312 for guiding and restraining, drawstrings 321 and 322 threaded through the drawstring channels, locking members 331 and 332 that can slide and lock on the drawstrings, and limiting knots 341 and 342 to prevent the drawstrings from coming out. The locking members 331 and 332 are made of flexible material. By tightening the drawstrings 321 and 322 and sliding the locking members 331 and 332 to the locked position, the main bag opening can be quickly tightened and closed; releasing the locking members 331 and 332 opens the bag opening, making the operation simple. The drawstrings 321 and 322 can preferably be made of high-strength cored paracord.

[0015] Furthermore, the package 1 comprises, from the outside to the inside, an outer fabric, a middle filling layer, and an inner lining fabric, forming the basic protective body. The outer fabric can be a fabric that combines durability and good texture, the inner lining fabric can be a soft and scratch-resistant fabric, and the middle filling layer is a cushioning material. In a preferred embodiment to achieve extreme lightweighting, a thick cotton-linen outer fabric, a high-count pure cotton inner lining, and a fluffy cotton filling layer can be used.

[0016] Furthermore, a storage compartment 5 may be provided on the back of the bag body 1. The storage compartment 5 has an independent zipper opening on the outer fabric, and its compartment is located between the outer fabric and the middle filling layer, thereby physically isolating it from the inside of the main bag, making it convenient for storing small items.

[0017] Furthermore, the structural design of the carrying case makes it particularly suitable for storing precision equipment requiring cushioning and protection. As a typical application configuration, the carrying case can be configured to store camera equipment.

[0018] In summary, this utility model, through the above-mentioned technical solution, creatively extends the shoulder strap 2 from a single carrying function to a retractable built-in buffer layer, uses a single cord structure to control the opening and closing and storage channels, and adopts a connection and adjustment method without buckles made of all fabric, thus achieving a balance between structure, function and safety.

[0019] Compared with the prior art, the beneficial effects of this utility model are: 1. The core component achieves innovative functional reuse: the shoulder straps are not only used for carrying, but can also be completely stored inside the bag without disassembly via a drawstring closure, forming a cushioning protective layer at the bottom. This design transforms a single-function carrying component into a built-in cushioning protective layer, significantly enhancing the bag's protective performance in a compact form without adding much extra weight or cost. It is particularly beneficial for protecting delicate equipment such as cameras, maximizing space utilization and functional efficiency.

[0020] 2. Efficient operation through an integrated structure: The single drawstring opening and closing structure serves the dual functions of opening and closing the bag and storing the shoulder straps. Users can complete the operation of storing and retrieving devices and changing usage modes in the same step (tightening and loosening the drawstring), making the process extremely simple and intuitive, perfectly meeting the urgent needs for quick storage and retrieval and mode switching in scenarios such as photography.

[0021] 3. Completely eliminates risks associated with connectors and achieves extreme lightweight design: The shoulder straps are made of pure fabric, and all critical connection points (both ends of the shoulder straps, and the connection points of the adjustment components) employ a deep, insert-style stitching and multi-stitch reinforcement process, fundamentally eliminating the risks of metal or plastic connectors scratching internal items (such as camera bodies) or accidental breakage. Combined with carefully selected lightweight and environmentally friendly materials (such as thick cotton linen, high-count pure cotton, and fluffy cotton padding), the overall weight of the bag is reduced to approximately 160 grams, providing reliable protection while achieving significant portability.

[0022] 4. Provides a layered, buckle-free length adjustment solution: The shoulder strap length can be flexibly adapted through various basic methods such as user knotting or factory sewing, always eliminating the need for external buckles. In the preferred embodiment, the unique double U-shaped cross-strap structure, through the self-knotting of the long movable loop, provides users with tool-free, stepless, and precise daily use convenience. The adjustment mechanism itself is also safe and reliable, eliminating the risk of scratching storage devices.

[0023] 5. A multi-layered and reliable comprehensive protection system has been constructed: The optional external interlayer storage compartment physically isolates small items from the main compartment equipment, preventing internal impacts. The bag's multi-layered composite structure, reinforced stitching at key connection points, and stackable shoulder strap cushioning layers together form a comprehensive protection system from external impact cushioning to internal item isolation, significantly improving the protection capability for delicate or fragile items such as cameras. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of a preferred embodiment of the present invention, showing its overall shape, the positional relationship of each component, and the shape of the shoulder strap when it hangs naturally.

[0025] Figure 2 for Figure 1 The diagram shown illustrates the state of the portable bag during the shoulder strap storage process, demonstrating the shape after the shoulder strap is inserted through the main pocket opening and folded and laid out at the bottom.

[0026] Figure 3 for Figure 2 The diagram showing the continuation of the state further illustrates the shape after the drawstring is tightened to form a compact inner liner.

[0027] Figure 4 for Figure 1 The diagram shows a detailed view of the portable bag in its carrying position, highlighting the connection structure between the main shoulder strap and the adjustment strap (including the first U-shaped strap and the second U-shaped strap).

[0028] Figure 5 for Figure 1 The diagram shown illustrates another state of the portable bag when it is being carried on the back, highlighting the shape when the drawstrings are tightened and locked.

[0029] Figure 6 for Figure 5 The diagram showing the continuation of the state further illustrates the shape after the shoulder strap length has been shortened.

[0030] Figure 7 for Figure 1 The schematic diagram of the external structure of the portable bag shown illustrates the location of the interlayer storage compartment located on the outside of the bag.

[0031] Explanation of reference numerals in the attached figures 1: Inclusion body 1a: First side view position 1b: Second side position 1c: Front position 1d: Rear View 2: Shoulder straps 2a: First end of shoulder strap 2b: Second end of shoulder strap 21: Main belt segment 22: Adjusting belt segment 221: First U-shaped belt 222: Second U-shaped belt 3: Cable opening and closing structure 311, 312: Ropeway 321, 322: Drawstring 331, 332: Locking components 341, 342: Limiting knot 41, 42: Hand-held straps 5: Mezzanine storage compartment Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein, as well as... Figures 1 to 7 The embodiments shown are preferred embodiments including multiple optional features, intended to intuitively and comprehensively illustrate various possible implementations of this utility model, and not to limit the utility model. The scope of protection of this utility model is defined by the appended claims. In particular, the following description will mainly use the application of this portable bag in a camera storage scenario as an example for ease of understanding, but this should not be construed as the only limitation on its use. The portable bag structure of this utility model is also suitable for other items that require cushioning protection and convenient carrying, such as drones, lenses, precision instruments, or valuable tools.

[0033] like Figures 1 to 7 As shown, this utility model provides a portable bag with a multi-functional reusable structure. The purpose of this utility model is to overcome the shortcomings of the existing technology and integrate lightweight, quick access, comfortable carrying, multiple protections and strong scene adaptability through the innovative design of the overall structure.

[0034] 1. Core Structure, Functions, and Usage Patterns To achieve the above objectives, the portable bag comprises three core components: the bag body 1, the shoulder strap 2, and the drawstring closure structure 3.

[0035] Package 1: It has a main pocket opening at the top.

[0036] Drawstring opening and closing structure 3: It is arranged around the main bag opening for opening and closing the bag body 1.

[0037] Shoulder strap 2: Its first end 2a is fixedly connected to the first side surface 1a of the bag body forming the main pocket opening, and its second end 2b is fixedly connected to the second side surface 1b of the bag body forming the main pocket opening. Here, "fixed connection" refers to a non-detachable connection, that is, it does not include detachable connecting parts such as buckles, hooks, or snaps, and is preferably a direct and fixed connection achieved through sewing. The shoulder strap 2 itself is made of fabric and does not include adjusting buckles made of metal or plastic for adjusting the effective length of the shoulder strap.

[0038] The relative positions and connections of the three core components constitute the basic inventive concept of this utility model: the portable bag allows the shoulder strap 2 to be selectively and completely retracted into the bag body 1 via the drawstring closure structure 3 without disassembling any parts, and the bag body 1 is closed during this process via the same drawstring closure structure 3. This concept supports seamless switching between two core usage modes: Crossbody carrying mode (such as) Figure 4 , Figure 5 , Figure 6 (As shown in the diagram): Shoulder strap 2 is placed outside the bag.

[0039] Compact inner bag mode (such as) Figure 2 , Figure 3 (As shown in the diagram): After shoulder strap 2 is stored inside the bag, tighten the drawstring.

[0040] Optional features: In Figures 1 to 7 In the preferred embodiment shown, the carrying bag also includes two carrying straps 41 and 42, which are fixedly connected to the front position 1c and back position 1d of the bag body that constitute the main pocket opening, respectively, and are located outside the drawstring opening structure 3. When the carrying straps 41 and 42 are provided, a hand-carrying mode can be additionally supported. However, the carrying straps 41 and 42 are not essential components for realizing the core inventive concept.

[0041] 2. Shoulder strap length adjustment method Shoulder strap 2 is the core component enabling multi-functional reuse. Its total effective length (referring to the adjustable length for carrying) can be designed to be approximately 80 cm to 120 cm to accommodate users of different heights. In this invention, the length of the shoulder strap can be adjusted and customized in various ways according to user needs.

[0042] 2.1 Basic Adjustment Methods (Applicable to General Structures) In shoulder strap embodiments that only include the most basic fixed connection structure (e.g., only a section of strap directly connected to the bag body), its length can be adapted to different users in the following ways: Pre-sales and after-sales customization: The length can be customized directly according to the user's requirements through sewing process before leaving the factory; or it can be adjusted by the manufacturer through professional sewing after the sale.

[0043] Quick adjustment at the user end: Users can also tie knots directly on shoulder strap 2 to quickly and significantly shorten the overall effective length.

[0044] The above methods all reflect the core features of this utility model: the shoulder strap has no metal or plastic adjustment buckle and provides a fixed connection, and also provide basic length adaptability.

[0045] 2.2 Preferred embodiments and their convenient adjustment methods In a preferred and more convenient embodiment, such as Figures 1 to 7 As shown, the shoulder strap 2 specifically includes two parts: a main strap section 21 and an adjustment strap section 22. The first end of the main strap section 21 is the first end 2a of the shoulder strap 2, and the second end of the adjustment strap section 22 is the second end 2b of the shoulder strap 2.

[0046] Main strap section 21: Its first end 2a is fixedly connected to the first side position 1a of the bag body. The width of the main strap section 21 is preferably about 3.2 cm, for example, it can fluctuate within the range of 2.5 to 5 cm, which can take into account the comfort when carrying it. The material is preferably the same as the outer fabric of the bag body 1, and double-sided tape can be ironed on the inside to increase the stiffness.

[0047] Adjustable belt segment 22: It is specifically composed of a first U-shaped belt 221 and a second U-shaped belt 222. Both the first U-shaped belt 221 and the second U-shaped belt 222 have a fixed end and a movable loop extending from the fixed end.

[0048] The fixed end of the first U-shaped strap 221 is fixedly connected to the second end of the main strap segment 21, and the fixed end of the second U-shaped strap 222 is fixedly connected to the second side position 1b that constitutes the main bag opening.

[0049] The movable loops of the first U-shaped strap 221 and the movable loops of the second U-shaped strap 222 are interwoven and can adjust the effective length of the shoulder strap 2 by tying at least one of the movable loops into a knot.

[0050] The width of the U-shaped strap is preferably around 1.2 cm, but can vary within the range of 0.8 to 2 cm. The material is preferably a soft fabric that can be the same as the inner lining fabric of the bag. A thin, soft cotton lining with adhesive can be ironed inside to increase strength.

[0051] like Figure 4 , Figure 5 As shown, in a preferred adjustment scheme, the movable loop of the first U-shaped strap 221 is configured to be longer than the movable loop of the second U-shaped strap 222, and the length of the movable loop of the second U-shaped strap 222 is configured such that it is only possible for the movable loop of the first U-shaped strap 221 to pass through, and is not suitable for effectively adjusting the length of the shoulder strap 2 by tying itself.

[0052] The user pulls on the long movable segment of the first U-shaped strap 221, causing it to move back and forth between the short movable segment of the second U-shaped strap 222 until the shoulder strap 2 reaches the desired length. The user then ties the long movable segment itself into a knot (e.g., ...). Figure 6 As shown in the image, this allows for quick and secure stepless length adjustments for everyday use. This method provides precise length adaptation without requiring any additional accessories.

[0053] In one specific example of this configuration, the main belt segment 21 is approximately 80 cm long, and the adjusting belt segment 22 provides an adjustable margin of approximately 40 cm.

[0054] 2.3 Other optional implementation methods for adjusting the belt segment It is understood that the above-described adjustment scheme, consisting of a longer first U-shaped band 221 and a shorter second U-shaped band 222, is merely a preferred example. The core design of the adjustment band segment 22 of this invention lies in the fact that the movable loops of the two U-shaped bands are interlaced, and their length is fixed by at least one movable loop being knotted. Based on this, those skilled in the art can design various modifications.

[0055] For example, in a variant embodiment, the lengths of the movable loops of the first U-shaped strap 221 and the second U-shaped strap 222 can be designed to be close to or the same. With this configuration, the user can freely choose to knot either the movable loop of the first U-shaped strap 221 or the second U-shaped strap 222 themselves, or knot both movable loops, to fix the length of the shoulder strap 2, based on their operating habits or convenience.

[0056] In another variant embodiment, the movable segment of the first U-shaped band 221 can be designed to be shorter, while the movable segment of the second U-shaped band 222 can be designed to be longer. In this configuration, length adjustment is primarily achieved by pulling and stretching the longer movable segment of the second U-shaped band 222 and securing it by tying a knot in it.

[0057] All the above-described variant embodiments share the core feature of being fixed by knotting the movable segments of the fabric without metal or plastic adjusting buckles. They are different implementations of the same inventive concept of this utility model and should all fall within the protection scope of this utility model.

[0058] 3. Shoulder strap storage and reuse process This invention further realizes the functional reuse of the shoulder strap 2, from a carrying component to a built-in cushioning and protective layer, through the size design of the shoulder strap 2. To achieve this function, the shoulder strap 2 (especially its main strap segment 21) is configured to be laid at the bottom of the bag body 1 when stored to form a cushioning and protective layer.

[0059] The way the shoulder strap 2 forms a buffer protective layer at the bottom of the bag body 1 is laid mainly includes folding and laying flat, which is achieved by matching the length of the main strap section 21 with the internal dimensions of the bag body 1.

[0060] 3.1 Folding Laying Example In a preferred folding layup embodiment (e.g.) Figure 2 and Figure 3 As shown): The dimensions of the package body 1 are approximately 17 cm in height, 17 cm in bottom length, and 10 cm in bottom width; the width of the main strap section 21 is approximately 3.2 cm, and the total length (excluding the adjustment strap section) is approximately 80 cm.

[0061] The configuration is as follows: when the shoulder strap 2 is stowed, the main strap segment 21 is first laid along the height direction (approximately 17 cm) of one inner sidewall of the bag body 1, and the remaining length (approximately 63 cm) can be folded in a Z-shape at the bottom along its length direction (17 cm). Through this folding method, the main strap segment 21 forms a continuous, multi-layered laying strip at the bottom of the bag body. With this operation, the width of the coverage area formed by the main strap segment 21 at the bottom can be controlled by the number and method of folding, and can stably cover more than half of the bottom width. For example, under the above dimensions, the width of this coverage area can exceed 6 cm, thereby effectively covering the main load-bearing area at the bottom of the bag body, forming a continuous and increasingly thick buffer protective layer. This multi-layered laying state constitutes an effective buffer protective layer.

[0062] 3.2 Flat Tile Example It is understood that the method of forming the cushioning and protective layer is not limited to folding. For example, in a flat-lay embodiment, the total length of the main strap segment 21 can be designed to match a specific internal dimension of the bag body 1. Specifically, when the height and bottom length of the bag body 1 are both approximately 17 cm, the total length of the main strap segment 21 (excluding the adjustment strap segment) can be designed to be approximately 51 cm. When the shoulder strap 2 is stowed, the main strap segment 21 can be continuously laid along one complete inner sidewall (17 cm high), the bottom plane (17 cm long), and the opposite inner sidewall (17 cm high) of the bag body 1, thereby forming a single-layer, continuous, and complete coverage at the bottom. This design, through a single-layer continuous coverage, can also effectively reuse the shoulder strap for cushioning and protection, and is particularly suitable for scenarios that pursue extreme thinness and lightness.

[0063] 3.3 Storage and Function Conversion Process This utility model innovatively achieves complete storage and functional conversion of the shoulder strap 2, and its operation process is as follows: First, such as Figure 2 As shown, open the drawstring opening structure 3 and insert the entire shoulder strap 2 into the bag body 1 through the main pocket opening.

[0064] Subsequently, according to design requirements and the above embodiments, the shoulder strap 2 (especially its main strap section 21) can be laid out in a folded manner (e.g. Figure 2 and Figure 3 (As shown) or laid flat on the bottom of the package 1.

[0065] Finally, as Figure 3 As shown, tighten and lock the drawstring opening structure 3. At this point, the bag transforms from a crossbody carrying mode to a compact inner bag mode. Crucially, the laid main strap section 21 forms a continuous cushioning protective layer at the bottom of the bag. This process requires no disassembly of any parts, achieving a creative functional reuse of the shoulder straps from a single carrying function to a retractable cushioning pad, significantly enhancing the protective performance of the bag in its compact form.

[0066] 4. Specific composition and design of the rope opening and closing structure 3 The drawstring opening and closing structure 3 is used to achieve rapid opening and closing of the main pocket opening. Its basic components include drawstring channels 311 and 312 for guiding and restraining, drawstrings 321 and 322 threaded through the drawstring channels, locking elements 331 and 332 that can slide and lock on the drawstrings, and limiting knots 341 and 342 to prevent the drawstrings from slipping out. The locking elements 331 and 332 are made of flexible material. By tightening the drawstrings 321 and 322 and sliding the locking elements 331 and 332 to the locked position (e.g., ...), the drawstrings can be opened and closed quickly. Figure 3 , Figure 5 , Figure 6 The main pocket opening can be quickly tightened and closed by the locking parts 331 and 332 (as shown in the diagram); releasing the locking parts 331 and 332 (for example...) Figure 1 , Figure 2 , Figure 4 The bag can be opened by simply using the locking parts 331 and 332 as shown in the diagram. The operation is simple.

[0067] Specifically, the structure includes the following components: Drawstring channels: Two drawstring channels 311 and 312 are fixedly installed on the bag body 1. These two drawstring channels 311 and 312 are respectively located adjacent to the front position 1c and back position 1d of the bag body forming the main bag opening, and extend along the periphery of the main bag opening to guide and restrain the drawstrings 321 and 322. Two optional handles 41 and 42 are fixedly connected to the front position 1c and back position 1d of the bag body forming the main bag opening, respectively, and are located outside the drawstring channels 311 and 312.

[0068] First drawstring assembly: A drawstring 321 is threaded through the two rope channels 311, 312, with both ends extending from the same side region of the bag body 1. A limiting knot 341 is formed at both ends of the drawstring 321, and a locking member 331 is fitted onto the drawstring 321 and located between the limiting knot 341 and the entrance of the side rope channel, allowing the locking member 331 to slide along this section of the drawstring.

[0069] Second drawstring assembly: Another independent drawstring 322 is also threaded through the two drawstring channels 311, 312, with both ends extending from the other side of the bag body 1. A limiting knot 342 is formed at both ends of this drawstring 322, and another locking member 332 is fitted onto this drawstring 322 and located between the limiting knot 342 and the entrance of the other drawstring channel, allowing the locking member 332 to slide along this section of the drawstring.

[0070] When in use, the main bag opening can be tightened simultaneously and evenly from both sides by pulling the ends of the drawstrings on both sides (i.e., the rope segments acting near the limit knots 341 and 342) and locking them with their respective locking parts 331 and 332.

[0071] In terms of materials and processes, the drawstrings 321 and 322 are preferably made of high-strength cored rope, such as paracord. The locking components 331 and 332 are preferably made of flexible materials, such as knots formed by weaving or knotting the same rope as the drawstring, or slip buckles made of soft silicone, rubber, leather, etc., with smooth surfaces, no sharp edges, smooth sliding, and no scratching of items inside the bag. The limiting knot at the end of the drawstring's primary function is to prevent the drawstring from slipping out of the drawstring channel. This limiting knot can be implemented as a simple knot at the end of the rope, or it can be shaped into a decorative form that also has the aforementioned anti-slip function, such as a flower shape. These specific design forms are all optional implementation methods.

[0072] 5. Encapsulation structure, materials, and processes The wall of the package 1 has a multi-layered composite structure, comprising, from the outside to the inside, an outer fabric, a middle filling layer, and an inner lining fabric. The outer fabric is typically made of a fabric that combines durability and good texture, such as cotton, linen, or blended fabrics. The inner lining fabric is made of a soft, scratch-resistant fabric. The middle filling layer is a cushioning material.

[0073] In one embodiment, the inner lining fabric and the intermediate filling layer are fixed together by ironing and quilting, thereby forming a structurally stable, integral inner lining structure that prevents the filling from shifting. This layered structure together constitutes the basic protective body of the bag.

[0074] In a preferred embodiment, to achieve ultimate lightweighting and sufficient cushioning protection, the materials were optimized: the outer layer fabric is a thick cotton-linen fabric; the inner lining fabric is a high-count pure cotton fabric; and the middle filling layer is a fluffy cotton lining. Correspondingly, the main strap section 21 of the shoulder strap 2 uses the same fabric as the outer layer, and double-sided adhesive can be ironed onto the inside to increase stiffness; the adjusting strap section 22 uses the same fabric as the inner lining, and a thin, soft cotton lining with adhesive can be ironed onto the inside to increase strength. Through the combination and optimization of the above materials, the entire carrying bag achieves an ultra-light total weight of approximately 160 grams while ensuring structural strength and protective performance, greatly improving portability.

[0075] 6. Optional external storage compartment Based on the aforementioned stable layered structure, a double-layered storage compartment 5 can be integrally provided on the outer fabric of the back side of the package body 1, such as... Figure 7 As shown. The interlayer storage compartment 5 has an independent zipper opening. Its compartment body is located in the interlayer space between the outer fabric and the fixed intermediate filling layer and inner lining layer combination, thereby achieving physical isolation from the inside of the main bag, which facilitates safe and convenient storage and retrieval of small items such as mobile phones, keys, and filters.

[0076] 7. Reinforcement techniques for critical connection points To ensure load-bearing safety, all load-bearing connection points are directly and securely connected using high-strength sewing techniques. Specifically, the ends of the shoulder strap 2, the fixed ends of each U-shaped strap in the adjusting strap section 22, and the connection points with the main strap section 21 and the bag body 1 are all sewn into the bag body fabric or adjacent straps to a depth of at least 1 cm, preferably 2 to 3 cm. Furthermore, at each connection point, multiple parallel and / or perpendicular reinforcing stitches are sewn into the deeper insertion area. This process completely eliminates the risks associated with using detachable connectors, ensuring absolute reliability of the connection.

[0077] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. It is understood that the accompanying drawings... Figures 1 to 7 The embodiments shown and described above are preferred embodiments that include multiple optional features such as handles 41 and 42, specific adjustable straps 22, and interlayer storage compartments 5. The purpose is to clearly and specifically illustrate the principle and implementation of this utility model.

[0078] The scope of protection of this utility model is defined by the appended claims. Its core lies in the technical concept that allows the shoulder strap 2 to be stored inside the bag and its usage mode to be changed without disassembling any parts, achieved through the coordinated operation of the bag body 1, the fixedly connected fabric shoulder strap 2, and the drawstring opening and closing structure 3. Any implementation based on this core concept, whether or not it includes one or more of the aforementioned optional features, should be included within the scope of protection of this utility model.

[0079] For those skilled in the art, various modifications, equivalent substitutions or improvements can be made to the embodiments of this utility model without departing from the spirit and principles of this utility model, and these should also be considered within the protection scope of this utility model.

Claims

1. A portable bag with a multi-functional reusable structure, characterized in that, Including the bag body (1), shoulder straps (2), and drawstring closure structure (3), specifically: The package (1) has a main pocket opening at its top; The drawstring opening and closing structure (3) is arranged around the main bag opening for opening and closing the bag body (1). The shoulder strap (2) has its first end (2a) fixedly connected to the first side (1a) of the bag body that forms the main pocket opening, and its second end (2b) fixedly connected to the second side (1b) of the bag body that forms the main pocket opening; wherein the shoulder strap (2) is made of fabric and does not include metal or plastic adjusting buckles for adjusting the effective length of the shoulder strap; the fixed connection is a non-detachable connection, that is, it does not include detachable connecting parts such as buckles, hooks or snaps; The positions and connections of the bag body (1), shoulder strap (2) and drawstring closure structure (3) are configured such that the bag can selectively store the shoulder strap (2) inside the bag body (1) through the drawstring closure structure (3) without disassembling any parts, and can be laid at the bottom of the bag body (1) to form a buffer protective layer, and can also close the bag body (1) through the drawstring closure structure (3).

2. The portable bag according to claim 1, characterized in that, The fixed connection is a direct and fixed connection made by sewing.

3. The portable bag according to claim 2, characterized in that, When the shoulder strap (2) is stored inside the bag body (1), it can be laid in multiple layers at the bottom of the bag body (1) to form the cushioning protective layer.

4. The portable bag according to claim 3, characterized in that, The shoulder strap (2) includes two parts: a main strap section (21) and an adjustment strap section (22). The first end of the main strap section (21) is the first end (2a) of the shoulder strap (2), and the second end of the adjustment strap section (22) is the second end (2b) of the shoulder strap (2). The adjustment band (22) includes a first U-shaped band (221) and a second U-shaped band (222); Both the first U-shaped belt (221) and the second U-shaped belt (222) have a fixed end and a movable loop extending from the fixed end; Wherein, the fixed end of the first U-shaped belt (221) is fixedly connected to the second end of the main belt segment (21), and the fixed end of the second U-shaped belt (222) is fixedly connected to the second side position (1b) that constitutes the main bag opening; The movable loops of the first U-shaped strap (221) and the second U-shaped strap (222) are interwoven and the effective length of the shoulder strap (2) can be adjusted by tying at least one of the movable loops into a knot.

5. The portable bag according to claim 4, characterized in that, The movable segment of the first U-shaped belt (221) is longer than the movable segment of the second U-shaped belt (222); The length of the movable loop of the second U-shaped band (222) is configured such that only the movable loop of the first U-shaped band (221) can pass through, and the length of the shoulder strap (2) cannot or is not suitable for being effectively adjusted by knotting itself.

6. The portable bag according to claim 1, characterized in that, It also includes two handles (41, 42), which are fixedly connected to the front position (1c) of the bag body that constitutes the main bag opening and the back position (1d) of the bag body that constitutes the main bag opening, and are located outside the drawstring opening structure (3).

7. The portable bag according to claim 1, characterized in that, The rope opening and closing structure (3) includes a rope channel (311, 312) for guiding and restraining, a draw rope (321, 322) passing through the rope channel, a locking member (331, 332) that can slide and lock on the draw rope, and a limiting knot (341, 342) to prevent the draw rope from coming out. The locking member (331, 332) is made of flexible material.

8. The portable bag according to claim 1, characterized in that, The package (1) consists of an outer fabric, a middle filling layer and an inner lining fabric from the outside to the inside.

9. The portable bag according to claim 8, characterized in that, A double-layer storage compartment (5) is also provided on the back of the bag body (1). The double-layer storage compartment (5) has an independent zipper opening on the outer fabric, and the compartment body of the double-layer storage compartment (5) is located between the outer fabric and the intermediate filling layer.

10. The portable bag according to any one of claims 1 to 9, characterized in that, The carrying case is configured to store camera equipment.

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