Foldable bag

Abstract

The utility model relates to a bag manufacturing technology, and particularly provides a foldable bag. According to the technical scheme, the device comprises a base body frame made of a flexible lining material, and the surface of the base body frame is provided with preset creases; the flexible coating layer covers the outside of the matrix frame, and the top of the flexible coating layer is provided with an openable pocket opening; the two groups of symmetrical tightening systems are connected with the upper and lower corners of the coating layer; when the tightening system is tightened, the matrix frame forms a three-dimensional rectangular frame, and the corners exceed the frame; when the tightening system is loosened, the frame is folded into a compact state, and the corners are folded inwards. According to the scheme, a bearing state and a folding state can be quickly switched, and the folded film is thin and flat in surface.

Description

Technical Field

[0001] This utility model relates to the field of bag manufacturing technology, and in particular to a foldable bag. Background Technology

[0002] Cycling bags, as specialized bags mounted on the handlebars of bicycles, must simultaneously meet the needs of quick access to items while riding, structural stability on bumpy roads, and convenient storage after parking. Traditional cycling bags often use rigid shells to ensure load-bearing capacity, but this results in an excessively large folded size, making them difficult to carry on a bicycle. While soft folding bags can be compressed in size, they lack an effective support structure and are prone to collapsing and deforming when loaded with items, affecting their efficiency. Especially for handlebar mounting, if the folded thickness of the bag exceeds 5 centimeters, it will significantly obstruct headlight illumination or affect steering control, posing a safety hazard.

[0003] To address these issues, existing folding technologies typically employ a split frame and external restraints. For example, a webbing frame with elastic buckles at the four corners of the bag requires manually engaging each buckle to create a rigid frame when unfolding, and manually unbuckling and retracting the webbing when folding. This cumbersome and time-consuming process fails to meet the need for quick transitions during riding. More importantly, even after folding, the redundant webbing results in a still significant bag thickness, occupying space at the front of the bike and requiring additional webbing for securing. This leads to an uneven surface when folded, preventing a stable fit against the frame.

[0004] The market urgently needs an innovative folding structure that can quickly switch between a three-dimensional load-bearing state and an ultra-thin folded form of the cycling bag through a single operation, while maintaining a flat and compact geometric shape after folding. Current technologies have not yet solved the technical challenges of controlling the precision of the fold lines in the base frame and coordinating the tightening system, resulting in problems such as structural looseness and incomplete volume compression even when the bag is folded. Summary of the Invention

[0005] To address the aforementioned issues, the present invention aims to provide a foldable bag that can quickly switch between a three-dimensional load-bearing state and an ultra-thin folded form through a single tightening operation, and has the advantages of being thin and having a flat and compact surface after folding.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This application provides a foldable bag, the technical solution of which is as follows: A foldable bag, characterized in that it comprises:

[0008] The base frame is made of a flexible inner lining material, and its surface is pre-formed with creases to define the folding axis;

[0009] A flexible overlay layer covers the outside of the substrate frame and forms a pocket at the top that can be selectively opened and closed;

[0010] Two sets of clamping systems are symmetrically arranged on both sides of the flexible covering layer. Each set of clamping systems connects the upper and lower corners on the same side of the flexible covering layer and the substrate frame it covers.

[0011] When the fastening system tightens, the base frame forms a three-dimensional rectangular frame along the folds, and the upper and lower corners are pulled together by the fastening system to form upper and lower protruding corners that extend beyond the three-dimensional rectangular frame;

[0012] When the tensioning system is released, the base frame folds along the creases into a compact frame, and the upper and lower protrusions converge inward to form the upper and lower corners.

[0013] This technical solution achieves rapid transformation of the cycling bag's form through the synergy of the base frame and the fastening system. The base frame uses a flexible lining material with pre-formed creases, allowing for precise folding guided by these creases while retaining the lightweight properties of the flexible material. The flexible covering layer wraps around the base frame to form a complete bag, with an openable pocket at the top for quick access during riding. The symmetrically arranged fastening system drives the base frame's shape transformation by simultaneously tightening or releasing the upper and lower corners on both sides: when tightening, the fastening system pulls the upper and lower corners away from the base frame to form protruding angles, forcing the frame to unfold along the creases into a three-dimensional rectangular structure, using the reverse tension generated by the protruding angles to enhance frame stability. When releasing, the protruding angles converge inward, folding the base frame into a compact form, eliminating redundant structural accumulation, reducing the bag's thickness, and resulting in a compact yet structurally stable folded size. This solution controls the frame's unfolding and folding simultaneously through a single fastening operation, avoiding separate locking operations, reducing the bag's volume by at least 70% after folding, making it easy to carry and store.

[0014] Furthermore, this application also proposes that the tightening system includes:

[0015] The adjusting belt assembly has a first connecting end connected to the upper corner and a second connecting end connected to the lower corner;

[0016] A tightening component, connected to the adjusting belt assembly, is used to adjust the length of the adjusting belt assembly between the first connecting end and the second connecting end to achieve tightening or loosening.

[0017] The tightening system simplifies the multi-point buckle operation of traditional split-frame designs into a single control action through the linkage design of the adjusting strap assembly and the tightening component. The adjusting strap assembly directly connects to the upper and lower corners of the bag, and the tightening component uniformly adjusts the strap length between the two ends, allowing the user to simultaneously control the tightening or loosening of the entire tightening system by operating only the tightening component. This design eliminates the redundant operation steps of individually fastening or unfastening buckles in traditional solutions, while also avoiding the increase in bag thickness caused by redundant accumulation after folding the split webbing. The adjusting strap assembly is symmetrically distributed on both sides of the bag, forming a mechanically symmetrical tension path during tightening, ensuring the stable unfolding of the three-dimensional frame. During loosening, the strap length is released, allowing the bag to fold naturally along the preset crease, reducing the negative impact of redundant material on the fold thickness. The centralized control characteristics of the tightening component further optimize operational efficiency, eliminating the need for manual adjustment of multiple connection points during bag shape transformation, thus achieving a more compact geometric shape after folding.

[0018] Furthermore, this application also proposes that the flexible covering layer has at least one partition layer inside the matrix frame, and the edge of the partition layer is detachably connected to the inner wall of the package via Velcro.

[0019] Furthermore, this application also proposes that the matrix framework includes:

[0020] The main body consists of a three-dimensional rectangular frame or a compact frame structure formed along the fold lines;

[0021] The connecting part forms an upper and lower protruding angle along the crease when the fastening system tightens, and converges into an upper and lower end angle when it is released.

[0022] This technical solution achieves precise control over the folded and unfolded forms by dividing the base frame into two functional modules: the main body and the connecting part. The main body, as the foundation of the bag, determines the switching path between a three-dimensional rectangle and a compact folded state through its crease layout, ensuring stable rigid support when the bag is unfolded. The connecting part, through the coordinated design of the creases and the fastening system, extends outward at a specific angle to form upper and lower protruding corners when tightened, enhancing the deformation resistance of the top and bottom of the bag and providing a mechanical fulcrum for the fastening system. When released, the connecting part converges inward along the pre-set creases, allowing the upper and lower protruding corners to fully embed into the main body as upper and lower corners, eliminating the thickness redundancy caused by component misalignment after folding traditional split-frame designs, thus achieving an ultra-thin form in the folded state.

[0023] Furthermore, this application also proposes that the top of the flexible covering layer is provided with at least one of a zipper, Velcro, or snap, which can be closed or opened to form a pocket that can be selectively opened and closed.

[0024] Furthermore, this application also proposes that the main body includes:

[0025] Base plate;

[0026] The front panel and the rear panel are respectively connected to the front and rear sides of the base plate;

[0027] The first and second top plates are respectively connected to the top of the front panel and the rear panel;

[0028] Two first side panels are respectively connected to both sides of the front panel;

[0029] Two second side panels are respectively connected to both sides of the rear panel;

[0030] The joints of the bottom plate, front panel, rear panel, first top plate, second top plate, first side plate, and second side plate are provided with horizontal or vertical creases.

[0031] When the fastening system tightens:

[0032] The first and second roof plates are joined together to form a roof plate, and a gusset is formed at the joint.

[0033] The two first side panels are joined with the two second side panels to form the left side panel and the right side panel.

[0034] When the tensioning system releases:

[0035] The base frame is folded along the fold line in the middle of the base plate;

[0036] The front half of the base plate, the front panel, and the two first side plates constitute the front frame of the compact frame;

[0037] The rear half of the base plate, the rear panel, and the two second side panels form the rear frame of the compact frame.

[0038] This technical solution achieves seamless transformation between folded form and three-dimensional frame through the collaborative design of modular panels and preset creases. The base plate serves as the basic support unit, connecting the front and rear panels respectively to form a longitudinally extending structure of the bag's main body. The first and second top plates connect to the front and rear panels respectively, forming a closed top plate structure through mating, ensuring the integrity of the top in the three-dimensional form. The first and second side plates on both sides, when tightened, mat together to form complete sidewalls, improving the stability of the three-dimensional state. The horizontal or vertical creases at the joints of each panel constitute a folding guide path, allowing the panels to fold along a preset trajectory when released. When the tightening system is released, the fold line in the middle of the base plate guides the front and rear halves to fold in opposite directions. The front half, together with the front panel and the first side plate, forms the front frame, and the rear half, together with the rear panel and the second side plate, forms the rear frame, compressing the overall thickness through symmetrical folding. This structure allows for the simultaneous unfolding or folding of all panels through a single tightening operation, eliminating the need for separate locking mechanisms. Simultaneously, the crease layout ensures a tight overlap between the folded front and rear frames, controlling the bag's thickness to the material's physical limits.

[0039] Furthermore, this application proposes that the base plate is an integral flexible inner lining plate with bending stiffness, the middle part of which can flexibly deform under external force to form a fold line. This technical solution optimizes the folding form through the structural innovation of the integral flexible inner lining plate. The base plate adopts an integral flexible inner lining plate with bending stiffness, which ensures the structural rigidity of the base plate in the unfolded state to bear the weight of the item, while allowing deformation during folding due to the flexibility of the material itself. The flexible deformation design in the middle part of the front-to-back direction allows the base plate to bend naturally along the fold line during folding, avoiding the increase in thickness caused by material overlap at the joints of traditional split frames. The combination of bending stiffness and flexible deformation allows the base plate to maintain overall flatness during folding while reducing the folding thickness, thereby eliminating the volume expansion problem caused by redundant material accumulation.

[0040] Furthermore, this application also proposes that the connecting portion includes:

[0041] Four first connecting pieces are respectively located between the two sides of the first top plate and the two first side plates, and between the two sides of the second top plate and the two second side plates. Each first connecting piece has a diagonal first oblique crease.

[0042] Two second connecting pieces are respectively located on both sides of the base plate. Each second connecting piece is connected to its adjacent first and second side plates, and diagonal second oblique creases are provided on both sides with the center line of the base plate in the front-back direction as the boundary.

[0043] When the tightening system is tightened, the four first connecting pieces combine in pairs to form the upper protrusions on both sides, and the two second connecting pieces form the lower protrusions on both sides.

[0044] This technical solution optimizes the layout of the connecting pieces and the crease design to achieve efficient material packing in the folded state. Four first connecting pieces are distributed between the top and side panels. Their diagonal first oblique creases ensure that the pieces fold in a specific direction when tightened, forming upward-pointing angles in pairs. This enhances the frame's stability in the unfolded state and prevents disorderly stacking of the pieces when folded. Two second connecting pieces are located on both sides of the bottom plate. Through symmetrical second oblique creases on both sides, they form downward-pointing angles during tightening, ensuring uniform stress distribution in the connection area between the bottom and side panels. Simultaneously, when releasing, they naturally fold inward along the oblique creases to form a lower corner, reducing the redundant thickness of the bottom plate after folding. The oblique design of the first and second oblique creases guides the connecting pieces to deform along a preset path during folding, resulting in a more compact material distribution, thereby reducing the overall thickness of the folded bag and maintaining a flat shape.

[0045] Furthermore, this application also proposes:

[0046] Each first piece has a first notch at its outer corner, and the first oblique crease extends in the direction of the first notch;

[0047] Each second piece has a second notch at the center of its outer edge, and the extension direction of the second diagonal creases on both sides points to the second notch.

[0048] This technical solution achieves directional shrinkage of the patch material during folding by setting notches at specific locations on the patch and combining this with the extension direction of the oblique crease. For the first patch, the first notch at the outer corner and the extension direction of the first oblique crease form a geometrical guiding relationship, allowing the patch to shrink inward along the oblique crease when tightened, avoiding wrinkles and sharp corners caused by material redundancy at the outer corner. For the second patch, the second notch in the middle of the outer edge and the extension direction of the second oblique creases on both sides form a symmetrical guiding structure, allowing the material on both sides of the patch to shrink synchronously along the oblique crease towards the notch when released, eliminating misalignment and accumulation of material on both sides due to differences in folding paths. The above-mentioned design of notches and creases allows redundant material to be accommodated by the notch and directionally compressed through the crease path during patch folding, thereby significantly reducing the overall thickness of the corners and protrusions of the folded package while maintaining surface flatness.

[0049] Furthermore, this application also proposes:

[0050] The back of the flexible overlay has a fixing component for connecting to the frame; the fixing component is the MOLLE system.

[0051] The front end of the flexible covering layer has a storage pouch;

[0052] The front of the storage bag has an elastic strap for securing external items.

[0053] This technical solution addresses the stability and storage efficiency issues of front-mounted cycling bags through three levels of structural optimization. First, the MOLLE system on the back of the flexible overlay serves as a fixing component. Utilizing the modular connection characteristics of standardized webbing, it enables quick installation and removal of the bag from the frame, avoiding the increased folding thickness caused by redundant webbing in traditional split-frame designs. Second, the integrated storage pouch at the front uses an independent cavity structure to categorize and store frequently used items, reducing the impact of items piling up inside the main bag on the folded shape, making the main bag easier to compress into an ultra-thin state after loosening. Finally, elastic straps on the front of the storage pouch dynamically adapt to external items of different sizes (such as water bottles and tools) using their tensile deformation characteristics. This provides non-rigid restraint during bumpy rides, avoiding interference from hard buckles on the folded thickness and preventing items from falling off. These three technical measures work synergistically to maintain the flatness of the folded bag while balancing the need for functional expansion during riding and the utilization of frame space.

[0054] As can be seen from the above, the foldable bag and its fastening system, flexible covering layer and base frame structure provided in this application, through the linkage adjustment of the base frame by the fastening system, enable the bag to be precisely folded along the preset crease to form a compact frame when folded, and to be tightened by the fastening system to form a rigid three-dimensional structure when unfolded. It has the advantages of being able to quickly switch between a three-dimensional load-bearing state and an ultra-thin folded form through a single fastening operation, and having a reduced thickness and a flat and compact surface after folding. Attached Figure Description

[0055] Figure 1 A three-dimensional schematic diagram of the bag provided in this application in a tightened state.

[0056] Figure 2 A schematic diagram of the back of the bag provided in this application in a tightened state.

[0057] Figure 3 A three-dimensional schematic diagram of the package provided in this application in a relaxed state.

[0058] Figure 4 A schematic diagram of the back of the bag provided in this application in the unstressed state.

[0059] Figure 5 This is a schematic diagram of the planar unfolding of the base frame.

[0060] Figure 6 This is a schematic diagram of the base frame folded into a three-dimensional rectangular frame.

[0061] Figure 7 This is a front view of the base frame folded into a compact frame. Detailed Implementation

[0062] The embodiments of this utility model are described in detail below. Examples of these embodiments 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 this utility model, and should not be construed as limiting this utility model.

[0063] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing 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.

[0064] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0065] In this utility model, 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 connection. 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, or a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0066] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0067] like Figure 1-7As shown, this embodiment relates to a foldable bag, including a base frame 1 made of a flexible inner lining material, the surface of which is pre-formed with creases to define the folding axis. A flexible covering layer 2 covers the outside of the base frame 1 and forms a pocket at the top that can be selectively opened and closed. Two sets of fastening systems 3 are symmetrically arranged on both sides of the flexible covering layer 2, each set of fastening systems 3 connecting the upper end corner 26 and the lower end corner 27 on the same side of the flexible covering layer 2 and the base frame 1 it covers. Since the flexible covering layer 2 and the base frame 1 have a covering relationship and deform synchronously, the names of the components, upper end corner 26, lower end corner 27, upper protrusion corner 24, and lower protrusion corner 25, are shared for the end positions of the flexible covering layer and the base frame in this description. When the fastening system 3 tightens, the base frame 1 forms a three-dimensional rectangular frame 30 along the folds, and the upper corner 26 and lower corner 27 are pulled together by the fastening system 3 to form an upper protruding corner 24 and a lower protruding corner 25 that extend beyond the three-dimensional rectangular frame 30. When the fastening system 3 releases, the base frame 1 folds into a compact frame, and the upper protruding corner 24 and lower protruding corner 25 converge inward to form the upper corner 26 and the lower corner 27.

[0068] The crease axis of the base frame 1 refers to the pre-pressed material weakening line, which can be a linear recessed structure formed by a stitching process, i.e., the stitching line between the various panels of the base frame 1. Its function is to guide the flexible material to fold along a predetermined path. The flexible covering layer 2 can be made of waterproof Oxford cloth to improve durability and waterproofness. The selectively openable pocket of the flexible covering layer 2 can be an opening and closing structure achieved by a zipper 21 or Velcro, used to maintain the bag's loading function. The symmetrical arrangement of the fastening system 3 means that two sets of independent control mechanisms are located on the left and right sides of the bag body, respectively. Each set controls the upper corner 26 and the lower corner 27 on the same side, driving the frame shape transformation by synchronously shortening the distance between the connecting ends. The upper protrusion angle 24 and the lower protrusion angle 25 refer to the protruding structures formed by the upper corner 26 and the lower corner 27 towards the outside of the bag body under the action of tension when the fastening system 3 is tightened. Their geometric extension direction forms an angle with the main frame of the bag body. When the tightening system 3 is in the tightened state, the symmetrically applied tension on both sides acts on the upper corner 26 and the lower corner 27, forcing the base frame 1 to unfold along the pre-set creases to form a three-dimensional rectangular frame 30. At this time, the upper corner 26 and the lower corner 27 extend outward under the tension to form protruding corners 24 and 25. The reverse tension generated by these protruding corners enhances the frame's resistance to deformation. When the tightening system 3 is released, the protruding corners 24 and 25 lose their external force constraint, the base frame 1 folds naturally along the creases, and the protruding corners 24 and 25 retract inward to return to their original shape of end corners 26 and 27. The flexible covering layer 2 folds with the frame to form a compact shape. During this process, the crease axis ensures the uniqueness of the folding path and eliminates the possibility of excess material accumulation. Through the above technical solution, this application can realize the rapid switching between the cycling bag in a three-dimensional load-bearing state and an ultra-thin folding form, without the need to operate multiple locking devices in steps during the folding process. In the unfolded state, the counter-tension provided by the protruding corner structure enhances the stability of the frame. After being released, the flexible inner liner folds orderly along the predetermined creases, ensuring the compactness of the storage form and the flatness of the surface, effectively solving the space occupation problem in the vehicle front installation scenario.

[0069] In the specific design, the top of the flexible covering layer 2 is equipped with at least one of a zipper 21, Velcro, or snaps. The zipper 21, Velcro, or snaps can be closed or opened to form a selectively closable pocket. The zipper 21 is a linear closure element consisting of two flexible chains and a sliding head. Specifically, it can be made of nylon or resin teeth and a waterproof coated fabric. The sliding head continuously engages the teeth to form a fully sealed closure path, preventing items from falling out or water from entering the bag. The Velcro is a planar closure element consisting of a hook and loop side bonded together. Specifically, it can be made of polyester fiber or nylon adhesive strips. The pocket opening can be quickly opened and closed by peeling and pressing the two sides together, without requiring precise alignment. The snaps are point-type closure elements consisting of a convex fastener and a concave buckle. Specifically, they can be made of metal or plastic. Multiple points of fastening maintain the stability of the opening while reducing the space occupied by the closure mechanism when folded. Specifically, the closure element at the top of the flexible covering layer 2 is configured with a planar structure. When the fastening system 3 is released, and the bag body is folded along the creases into a compact shape, the closure element can bend or stack synchronously with the flexible covering layer 2, avoiding local bulges caused by rigid components. The zipper 21 maintains the flatness of the folded surface through the flexible engagement of the zipper teeth. The Velcro reduces the thickness accumulation by separating the adhesive strip without rigid support. The snaps reduce folding interference through the flattened design of the fastener and the buckle seat. Thus, the planar characteristics of the closure element prevent the formation of additional protrusions during folding, thereby meeting the core requirement of maintaining an ultra-thin shape after folding the cycling bag. Through the above technical solution, this application solves the problem of excessive thickness after folding due to the complex closure method of the top opening of traditional cycling bags, and achieves rapid switching of the closed state and thickness control of the folded shape. The planar characteristics of the zipper 21, Velcro, or snaps allow them to deform flexibly with the bag body during folding, avoiding volume expansion caused by rigid closure mechanisms, thereby ensuring that the cycling bag maintains a flat shape after folding, meeting the ultra-thin storage requirements in the case of mounting on the front of the bike.

[0070] like Figure 2 and 4As shown, the back of the flexible covering layer 2 is provided with a fixing component 18 for connecting to the frame, and the fixing component 18 is a MOLLE system. The front end of the flexible covering layer 2 is provided with a storage bag 19, and the front end of the storage bag 19 is provided with elastic straps for elastically securing external items. The MOLLE system refers to a connection structure based on the modular lightweight load-bearing equipment standard. Specifically, it can be implemented using a base plate with a horizontal webbing array and matching buckle components. The bag and frame are detachably connected through the interlocking and fastening of the webbing. The storage bag 19 is an independent cavity structure integrally formed with the main bag body. Specifically, it can be sewn together with the main bag body to form a separate space for classifying and storing small items such as keys and tools. The elastic straps are restraint components with tensile resilience. Specifically, they can be made of silicone-coated nylon braided straps in conjunction with metal hook and loop components, securing items through their deformation ability to automatically contract after stretching.

[0071] When the bag is folded, the flat webbing layout of the MOLLE system ensures that the fixing component 18 fits perfectly against the back of the bag and secures it to the frame. The storage pouch 19, with its independent cavity design, separates frequently accessed items from the main bag contents, reducing bulges caused by internal items piling up when the main bag is folded and ensuring a flat folded shape. The elastic straps naturally contract and fit against the surface of the storage pouch 19 when not in use; their flat structure does not generate additional volume. When external items need to be secured, the stretched straps form a wrap-around restraint through elastic tension, preventing items from falling off without the need for rigid buckles. Through the above technical solutions, this application achieves a complete fit between the cycling bag and the frame plane when folded. The independent cavity structure of the integrated storage pouch 19 makes it possible to categorize and store items, ensuring orderly distribution of contents during folding and preventing bag deformation due to internal item misalignment. The elastic straps, through a non-rigid restraint mechanism, maintain an ultra-thin folded shape while meeting the need to secure external items during riding, resolving the technical contradiction of poor compatibility between traditional rigid buckles and folded shapes.

[0072] like Figure 1-4As shown, the tightening system 3 includes an adjusting strap assembly 4 and a tightening component 5. The adjusting strap assembly 4 has a first connecting end 41 connected to the upper corner 26 and a second connecting end 42 connected to the lower corner 27. The tightening component 5 is connected to the adjusting strap assembly 4 and is used to adjust the length of the adjusting strap assembly 4 between the first connecting end 41 and the second connecting end 42 to achieve tightening or loosening. The adjusting strap assembly 4 refers to a strap-shaped connecting structure with both ends fixed to the upper corner 26 and the lower corner 27 of the bag, respectively. Specifically, it can be a flexible strap made of webbing, elastic rope, or composite material, and the distance between the upper corner 26 and the lower corner 27 can be controlled synchronously through a single operation. The tightening component 5 is a mechanical device with a length adjustment function, specifically a ratchet buckle, slip buckle, or D-ring buckle, etc., which controls the bag's shape transformation by changing the effective working length of the adjusting strap assembly 4. Specifically, the adjusting strap assemblies 4 symmetrically arranged on both sides of the bag form a bidirectional traction path under the action of the tightening component 5. When the tightening component 5 shortens the effective length of the adjusting strap assembly 4, the upper corner 26 and lower corner 27 are pulled towards each other, forcing the flexible inner lining material to unfold along the pre-set creases to form a rigid frame structure. When the tightening component 5 releases the strap length, the distance between the upper corner 26 and lower corner 27 increases, and the bag body naturally folds and closes along the creases. This linkage design allows for switching between the three-dimensional frame and the folded form through a single-point operation, eliminating the need to adjust multiple independent buckles one by one. The symmetrical layout of the adjusting strap assembly 4 ensures even force distribution on both sides, avoiding structural distortion caused by asymmetrical contraction. At the same time, the released redundant strap body lies flat along the folding axis, eliminating the excess accumulation of traditional split webbing. This solution simplifies multi-point operation to single-point control, synchronously adjusting all connecting ends through the linkage tightening mechanism, eliminating the redundant steps of unfastening each buckle. Simultaneously, the released adjusting strap assembly 4 extends straight along the folding axis, avoiding the increase in thickness caused by multi-directional winding. Through the above technical solution, this application solves the problems of cumbersome operation steps and excessive folding thickness in the traditional solution, and realizes the linkage adjustment of all connecting ends of the package body through a single tightening component 5, so as to maintain a flat shape without additional binding.

[0073] In a further embodiment, the base frame 1 has at least one partition layer inside, the edges of which are detachably connected to the inner wall of the bag via Velcro. The partition layer is a flexible, layered structure inside the bag used to divide storage space. Specifically, it can be made from nylon fabric of the same material as the covering layer 2, cut into a sheet shape with a smooth surface and Velcro hooks or loops at the edges. It is detachably connected to the corresponding Velcro area on the inner wall of the bag. This structure allows the partition layer to stably separate items in both unfolded and folded states. The Velcro connection refers to a reusable fixing method using hook-and-loop adhesion, specifically achieved by sewing Velcro strips to the edges of the partition layer and corresponding positions on the inner wall of the bag. In detail, when the base frame 1 is unfolded into a three-dimensional rectangular frame 30 or folded into a compact frame, the partition layer is fixed to the inner wall of the bag via edge Velcro, forming independent storage areas. For example, the bag can be divided into upper and lower layers or left and right compartments for the categorized storage of items such as cycling tools and electronic devices.

[0074] like Figure 5-7 As shown, its base frame 1 includes a main body and connecting parts. The main body forms a three-dimensional rectangular frame 30 or a compact frame structure along the creases. The connecting parts form upper protruding angles 24 and lower protruding angles 25 when tightened by the fastening system 3, and converge into upper end angles 26 and lower end angles 27 when released. The main body refers to the basic support structure defined by the creases, which can be made of flexible inner lining panels with pre-set creases spliced ​​together. The crease layout is consistent with the shape transformation path when the bag is unfolded or folded. The main body achieves the shape switching of the overall structure through the directional folding of the creases, solving the problem of folding thickness caused by redundant stacking of traditional split skeletons. The connecting parts refer to the deformable transition structure that connects with the main body, which can be achieved by using a spliced ​​inner lining panel with a diagonal crease design. The spliced ​​panel undergoes directional bending along the creases under the action of the fastening system 3. The connecting parts form protruding angles 24 and 25 guided by the creases, and the protruding angles are eliminated when released, ensuring that there is no misalignment or stacking of the components after folding.

[0075] Specifically, when the fastening system 3 tightens, the connecting part extends outward along the diagonal crease, forming an upper protrusion 24 and a lower protrusion 25. These protrusions act as mechanical fulcrums, enhancing the bag's resistance to deformation. Guided by the creases, the main body unfolds into a three-dimensional rectangular frame 30, providing stable rigid support. When the fastening system 3 releases, the connecting part folds inward along the creases, causing the protrusions 24 and 25 to fully embed into the edge of the main body, transforming into ordinary end corners 26 and 27. At this point, the main body folds along the creases into a compact frame, with the folding paths of the connecting part and the main body complementing each other, eliminating redundant thickness caused by component misalignment after folding the split skeleton. Through the above technical solution, this application achieves flattened control of the folding shape, solving the problem of excessive thickness after folding traditional split skeletons. The collaborative folding mechanism of the connecting part and the main body simplifies the bag folding process; the protrusion structure is automatically formed during unfolding, eliminating the need for manual assembly of the split skeleton and significantly improving operational efficiency.

[0076] Furthermore, the main structure includes a base plate 9, a front panel 10 and a rear panel 11 connected to the front and rear sides of the base plate 9 respectively, a first top plate 12 and a second top plate 13 connected above the front panel 10 and the rear panel 11 respectively, two first side plates 14 connected to both sides of the front panel 10, and two second side plates 15 connected to both sides of the rear panel 11. Horizontal creases 201 or vertical creases 202 are provided at the joints of the base plate 9, front panel 10, rear panel 11, first top plate 12, second top plate 13, first side plates 14, and second side plates 15. When the fastening system 3 is tightened, the first top plate 12 and the second top plate 13 are joined to form a top plate, creating a pocket at the joint; the two first side plates 14 and the second side plates 15 are joined to form a left side plate and a right side plate. When the fastening system 3 is released, the base frame 1 folds along the fold line in the middle of the base plate 9. The front half of the base plate 9, together with the front panel 10 and the first side panel 14, forms the front frame part, and the rear half, together with the rear panel 11 and the second side panel 15, forms the rear frame part.

[0077] The transverse crease 201 or longitudinal crease 202 refers to the crease lines set at the panel joints. Specifically, these can be groove structures formed by the stitching lines between the flexible inner lining panels, used to guide the folding direction and limit the folding angle. The fold line in the middle of the base plate 9 refers to the fold line created by folding the flexible material of the base plate 9 under external force, and is not pre-generated. The butt joint between the first top plate 12 and the second top plate 13 refers to the planar contact formed by the edges of the two top plates under the action of tightening force. Specifically, the butt joint edges can be complementarily connected by a zipper 21 on the flexible covering layer 2 to improve closure stability. The composition of the front frame and the rear frame means that after folding, the base frame 1 separates into two symmetrical units, and the thickness of the two units is minimized when they are stacked through the crease layout.

[0078] In this design, modular panels form a folding path network through preset creases. When the tightening system 3 tightens, it pulls each panel along the creases to unfold to a predetermined position. The front panel 10 and rear panel 11 act as longitudinal support units, respectively driving the first top plate 12 and the second top plate 13 to move upwards until the top plates meet to form a closed top. The first side plate 14 and the second side plate 15 are driven to unfold to both sides by the tightening force, and after the side plates meet, they form a side wall structure perpendicular to the bottom plate 9. When the tightening system 3 is released, the bottom plate 9 bends along the fold line, causing the front panel 10 and rear panel 11 to fold in the opposite direction. The first top plate 12 and the second top plate 13 disengage from the meeting state and overlap with the front and rear frames. During the folding process, all panels are synchronously folded along the preset creases, and the front and rear frames form a basically mirror-symmetrical structure. Redundant space is eliminated through overlapping compression. Through the above technical solution, the cycling bag can form symmetrically overlapping front and rear frame parts after folding, compressing the overall thickness to nearly two layers of material. The panel-linked folding mechanism replaces the traditional separate locking system, allowing for a single tightening or loosening action to switch between forms, meeting the need for quick storage during rides. The symmetrical folding path guided by creases ensures a flat surface after folding, eliminating the problem of insecure fixation caused by uneven surfaces in traditional folding bags.

[0079] The base plate 9 is a one-piece flexible inner lining with bending stiffness. Its central portion in the front-to-back direction can flexibly deform under external force to form a fold line. Bending stiffness refers to the material's ability to resist bending deformation, which can be achieved using a composite sandwich structure inner lining. This ensures the load-bearing capacity of the base plate 9 in its unfolded state while allowing for controlled deformation during folding. The one-piece flexible inner lining means that the base plate 9 is a seamless, continuous, monolithic structure, eliminating gaps at the joints of traditional split frames and preventing material overlap and increased thickness during folding. Specifically, in its unfolded state, the base plate 9 maintains its planar shape through bending stiffness, providing a stable load-bearing foundation for the package. When folding forces are applied to the front and rear ends of the base plate 9, the central flexible deformation area preferentially bends, forming a fold line along the front-to-back direction, causing the front and rear halves of the base plate 9 to fold and fit together along the fold line. Because the base plate 9 uses a one-piece structure, there is no misalignment of the joints or material accumulation of the split frame during folding. Through the above technical solution, this application solves the problem of excessive bag thickness caused by the redundancy of split frame folding, making the folded bag shape flatter and more compact, able to fit the surface of the frame without obstructing the lights or affecting steering control, and meeting the needs of quick folding and ultra-thin storage in cycling scenarios.

[0080] like Figure 5-7As shown, the connecting part includes a structural design of four first connecting pieces 16 and two second connecting pieces 17. The four first connecting pieces 16 are respectively located between the two sides of the first top plate 12 and the two first side plates 14, and between the two sides of the second top plate 13 and the two second side plates 15. Each first connecting piece 16 has a diagonal first oblique crease 22. The two second connecting pieces 17 are respectively located on both sides of the bottom plate 9. Each second connecting piece 17 is connected to its adjacent first side plate 14 and second side plate 15, and has a diagonal second oblique crease 23 on both sides of the centerline in the front-rear direction of the bottom plate 9. The first connecting piece 16 refers to the flexible board material located in the connection area between the top plate and the side plate. Specifically, it can be implemented using a flexible inner lining material of the same material as the base frame 1. The oblique crease guides the folding direction, forming a stable upper protrusion 24 when tightened. The second connecting piece 17 refers to the extension structure connecting the two sides of the base plate 9 to the side plates. Specifically, it can be implemented using a trapezoidal flexible board with symmetrical creases. The folding path is controlled by the symmetrical oblique creases, causing the lower protrusion 25 to retract inwards when the tension is released. Specifically, when the tightening system 3 tightens, the first connecting piece 16 folds inwards along the first oblique crease 22, and the two first connecting pieces 16 adhere to each other to form an upper protrusion 24. Simultaneously, the second connecting piece 17 folds outwards along the second oblique crease 23 to form a lower protrusion 25, thus unfolding the connecting part into a stable support structure. When the tightening system 3 releases, the first connecting piece 16 unfolds outwards along the oblique crease, and the upper protrusion 24 decomposes into two separate first connecting pieces 16, which are laid flat on both sides of the top plate. The second connecting piece 17 folds inwards along the oblique crease, and the lower protrusion 25 converges to form a connecting piece flush with the base plate 9, avoiding redundant material accumulation in the connecting area. The symmetrical layout of the oblique creases ensures that each connecting piece deforms synchronously along a preset path during the folding process, eliminating local bulges caused by disordered bending. Through the above technical solution, this application ensures that the connecting piece of the connecting part can be completely flat against the surface of the base frame 1 in the folded state, avoiding the problem of local thickening caused by the uncontrollable bending direction of the connecting piece, so that the overall thickness of the bag after folding is determined only by a single layer of flexible material, thereby meeting the requirements of the vehicle front installation scenario for the ultra-thin shape of the folded bag.

[0081] In a further embodiment, a first notch 28 is provided at the outer corner of the first connecting piece 16, and the extension direction of the first oblique crease 22 points towards the first notch 28. A second notch 29 is provided at the middle of the outer edge of the second connecting piece 17, and the extension direction of the second oblique creases 23 on both sides points towards the second notch 29. The first notch 28 refers to a recessed structure at the outer corner of the first connecting piece 16, which can be formed on the flexible inner lining material using a punching or hot-pressing process to accommodate excess material generated by the shrinkage of the connecting piece corner during folding. The second notch 29 refers to a recessed structure at the middle of the outer edge of the second connecting piece 17, which can be formed using the same processing method as the first notch 28, and is used to guide the material on both sides of the connecting piece to shrink symmetrically along the oblique crease during folding. The first oblique crease 22 refers to a pre-set fold line diagonally imprinted on the first connecting piece 16, used to guide the connecting piece to shrink inward along a preset path during folding. The second oblique crease 23 refers to a pre-set crease line symmetrically and obliquely pressed on both sides of the second connector 17, used to cause the material on both sides of the connector to shrink synchronously along the crease. When the fastening system 3 is tightened, the first oblique crease 22 of the first connector 16 guides the outer corner to fold into an upward protrusion 24. The first notch 28 can prevent the corner from bulging or sharp corners due to material accumulation during corner folding. Similarly, the second oblique creases 23 on both sides of the second connector 17 synchronously guide the outer edge material to shrink symmetrically, eliminating material misalignment caused by asymmetry in the folding paths on both sides, and preventing bulging or sharp corners due to material accumulation through the second notch 29. In this process, the synergistic effect of the notch and oblique crease makes the folding path of the connector precisely constrained, and the redundant material is directionally compressed into the accommodating space formed by the notch, thereby achieving a flat and snug fit after the connector is folded. Through the above technical solution, this application can effectively solve the problem of increased bag thickness and uneven surface caused by the accumulation of redundant material in the connector during folding, so that the folded bag remains compact and flat, making it easy to store and carry.

[0082] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0083] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A foldable bag, characterized in that, include: -The base frame (1) is made of a flexible inner lining material with creases pre-formed on its surface to define the folding axis; - A flexible covering layer (2) is wrapped around the outside of the base frame (1) and forms a pocket that can be selectively opened and closed at the top; - Two sets of fastening systems (3) are symmetrically arranged on both sides of the flexible covering layer (2). Each set of fastening systems (3) connects the upper corner (26) and lower corner (27) on the same side of the flexible covering layer (2) and the substrate frame (1) it covers. -When the fastening system (3) is tightened, the base frame (1) forms a three-dimensional rectangular frame (30) along the crease, and the upper corner (26) and lower corner (27) are pulled together by the fastening system (3) and formed as an upper protruding corner (24) and a lower protruding corner (25) that extend beyond the three-dimensional rectangular frame (30); - When the tightening system (3) is released, the base frame (1) folds into a compact frame, and the upper protrusion (24) and lower protrusion (25) converge into the upper end angle (26) and lower end angle (27).

2. The foldable bag according to claim 1, characterized in that, The fastening system (3) includes: - Adjusting belt assembly (4), the first connecting end (41) of which is connected to the upper corner (26), and the second connecting end (42) of which is connected to the lower corner (27); - Tightening component (5), connected to the adjusting belt assembly (4), is used to adjust the length of the adjusting belt assembly (4) between the first connecting end (41) and the second connecting end (42) to achieve tightening or loosening.

3. The foldable bag according to claim 1 or 2, characterized in that, The flexible covering layer (2) has at least one partition layer inside the base frame (1), and the edge of the partition layer is detachably connected to the inner wall of the package via Velcro.

4. The foldable bag according to claim 1, characterized in that, The matrix framework (1) includes: -The main body, along the creases, forms the main structure of the three-dimensional rectangular frame (30) or compact frame; - The connecting part, which forms the upper protrusion (24) and lower protrusion (25) when tightened by the fastening system (3) along the crease, converges into the upper end angle (26) and lower end angle (27) when released.

5. The foldable bag according to claim 1, characterized in that, The top of the flexible covering layer (2) is provided with at least one of a zipper (21), Velcro, or snap, which closes or opens to form the selectively closable pocket.

6. The foldable bag according to claim 4, characterized in that, The main body includes: -Base plate (9); - The front panel (10) and the rear panel (11) are respectively connected to the front and rear sides of the base plate (9); - The first top plate (12) and the second top plate (13) are respectively connected above the front panel (10) and the rear panel (11); - Two first side panels (14) are respectively connected to both sides of the front panel (10); - Two second side panels (15) are respectively connected to both sides of the rear panel (11); -The bottom plate (9), front panel (10), rear panel (11), first top plate (12), second top plate (13), first side plate (14) and second side plate (15) are provided with transverse creases (201) or longitudinal creases (202) at the joints. -When the tightening system (3) tightens: - The first top plate (12) and the second top plate (13) are joined to form a top plate, and the pocket is formed at the joining point; - Two first side panels (14) are joined with two second side panels (15) to form a left side panel and a right side panel; -When the tightening system (3) is released: -The base frame (1) is folded along the fold line in the middle of the base plate (9); -The front half of the base plate (9), the front panel (10) and the two first side plates (14) constitute the front frame of the compact frame; - The rear half of the base plate (9), the rear panel (11) and the two second side panels (15) constitute the rear frame of the compact frame.

7. The foldable bag according to claim 6, characterized in that, The base plate (9) is an integral flexible inner lining plate with bending stiffness. Its middle part in the front and rear directions can be flexibly deformed under the action of external force to form a fold line.

8. The foldable bag according to claim 6, characterized in that, The connection portion includes: - Four first connecting pieces (16) are respectively located between the two sides of the first top plate (12) and the two first side plates (14), and between the two sides of the second top plate (13) and the two second side plates (15). Each first connecting piece (16) has a diagonal first oblique crease (22). - Two second connecting pieces (17) are respectively located on both sides of the base plate (9). Each second connecting piece (17) is connected to its adjacent first side plate (14) and second side plate (15). The base plate (9) has a diagonal second oblique crease (23) on both sides, with the center line in the front-back direction as the boundary. - When the tightening system (3) is tightened, the four first tabs (16) combine in pairs to form the upper protrusions (24) on both sides, and the two second tabs (17) form the lower protrusions (25) on both sides.

9. The foldable bag according to claim 8, characterized in that: - Each of the first pieces (16) has a first notch (28) at its outer corner, and the first oblique crease (22) extends in the direction of the first notch (28); - Each of the second pieces (17) has a second notch (29) at the middle of its outer edge, and the extension direction of the second oblique creases (23) on both sides points to the second notch (29).

10. The foldable bag according to claim 1, characterized in that: - The back of the flexible covering layer (2) is provided with a fixing component (18) for connecting the frame, the fixing component (18) being a MOLLE system; -The front end face of the flexible covering layer (2) is provided with a storage bag (19); - The front end of the storage bag (19) is provided with an elastic strap for elastically binding external items.

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