Multifunctional hard-shell backpack

Abstract

The utility model relates to a multifunctional hard-shell backpack, and relates to the field of hard backpacks. The multifunctional hard-shell backpack comprises a hard-shell main body, a soft bag and an opening and closing strip, the hard shell main body forms a main accommodating space and is provided with a notch communicated with the main accommodating space, and the edge of the notch is provided with a reserved curved surface; the opening and closing strip is connected with the reserved curved surface and the soft bag, and the opening and closing strip extends in the extending direction of the reserved curved surface; the soft bag forms a partition space, the partition space is communicated with or separated from the main containing space, the opening and closing strip is provided with a detachable structure, and the detachable structure can open or close the partition space. According to the multifunctional hard-shell backpack, the technical problems that in the prior art, a hard-shell backpack is single in opening and closing mode, cannot be stored and picked in a partitioned mode and is too heavy are solved.

Description

Technical Field

[0001] This application relates to the field of hard-shell backpacks, and more specifically, to a multi-functional hard-shell backpack. Background Technology

[0002] Currently, hard-shell backpacks are limited to a single, openable design and are often too heavy, failing to meet the actual needs of consumers. Because the shell is typically injection-molded or vacuum-formed, the design and manufacturing process present significant challenges and limitations, hindering detailed design and processing. Consequently, simple, openable hard-shell backpacks dominate the market, but these are inconvenient for organization, retrieval, and carrying. Furthermore, the excessive weight of the hard-shell significantly increases the user's burden, making them less practical than traditional backpacks. Utility Model Content

[0003] The purpose of this application is to provide a multifunctional hard-shell backpack to alleviate the technical problems of existing hard-shell backpacks, such as limited opening and closing methods, inability to partition storage and retrieval, and excessive weight.

[0004] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0005] The multifunctional hard-shell backpack provided by this utility model includes a hard-shell body, a soft bag, and an opening and closing strip;

[0006] The hard shell body forms the main receiving space and has a notch that communicates with the main receiving space. The edge of the notch has a reserved curved surface.

[0007] The opening and closing strip is connected to the reserved curved surface and the soft bag, and the opening and closing strip extends along the extension direction of the reserved curved surface;

[0008] The soft bag forms a partition space, which is connected to or separated from the main receiving space. The opening and closing strip is equipped with a detachable structure, which can open or close the partition space.

[0009] Furthermore, the width of the reserved curved surface is greater than 1 cm.

[0010] Furthermore, the notch includes a first notch, the reserved curved surface includes a first reserved curved surface, and the soft bag includes a cover bag, the cover bag covering the first notch;

[0011] The first notch is located at the top of the hard shell body, and the edge of the first notch is provided with the first reserved curved surface, which extends along the top curved surface shape direction of the hard shell body;

[0012] The angle formed by the tangent of the edge of the first reserved curved surface and the curved surface that connects with the hard shell body and the horizontal plane is X1+90°, and X1≤90°;

[0013] The angle between the tangent of the first reserved curved surface and the horizontal plane is Z1. The direction of the first reserved curved surface is set within Z1. X1 and Z1 are complementary angles, and X1 and Z1 must be 90° apart.

[0014] Furthermore, there is a reserved distance between the top edge of the hard shell body and the inner wall of the first notch.

[0015] Furthermore, the reserved distance is greater than 1.5cm.

[0016] Furthermore, the notch includes a second notch, the reserved curved surface includes a second reserved curved surface, the soft bag includes a second closing pocket, and the second closing pocket covers the second notch;

[0017] The second notch is located on one side of the hard shell body, and the edge of the second notch is provided with the second reserved curved surface, and the second reserved curved surface extends along the curved surface shaping direction on both sides of the hard shell body;

[0018] The angle formed by the tangent of the second reserved curved surface and the edge of the curved surface that connects with the main body of the hard shell and the horizontal plane is X2+90°, and X2≤90°; the angle formed by the tangent of the second reserved curved surface and the horizontal plane is Z2, the direction of the second reserved curved surface is set within the range of Z2, X2 and Z2 are complementary angles, and X2 and Z2 must be 90° apart.

[0019] Furthermore, the notch includes a third notch, the reserved curved surface includes a third reserved curved surface, the soft bag includes a third closing pocket, and the third closing pocket covers the third notch;

[0020] The second notch and the third notch are located on both sides of the hard shell body, the edge of the third notch is provided with the third reserved curved surface, and the third reserved curved surface extends along the curved surface shaping direction of both sides of the hard shell body;

[0021] The angle formed by the tangent of the edge of the third reserved curved surface and the curved surface that connects with the main body of the hard shell and the horizontal plane is X3+90°, and X3≤90°; the angle formed by the tangent of the third reserved curved surface and the horizontal plane is Z3, the direction of the third reserved curved surface is set within the range of Z3, X3 and Z3 are complementary angles, and X3 and Z3 must be 90° apart.

[0022] Furthermore, the notch includes a fourth notch, the reserved curved surface includes a fourth reserved curved surface, the soft bag includes a soft package, and the soft package covers the fourth notch;

[0023] The fourth notch is located on the back of the hard shell body, and the edge of the fourth notch is provided with the fourth reserved curved surface; the angle formed by the tangent of the edge of the curved surface of the fourth reserved curved surface and the hard shell body and the horizontal plane is X4 = 90° and X ≤ 90°; the angle formed by the tangent of the fourth reserved curved surface and the horizontal plane is Z4, the direction of the fourth reserved curved surface is set within the Z4 range, X4 and Z4 are complementary angles, and X4 and Z4 must be 90° apart.

[0024] Furthermore, the sidewall of the soft package is equipped with multiple buckles, which are spaced apart along the circumference of the soft package.

[0025] Furthermore, the soft package is provided with two opposing shoulder straps.

[0026] Based on the above technical solutions, the technical effects achievable by this utility model can be analyzed as follows:

[0027] This utility model provides a multi-functional hard-shell backpack comprising a hard-shell body, a soft pouch, and an opening / closing strip. The hard-shell body forms a main storage space and has a notch communicating with the main storage space, the edge of which has a pre-reserved curved surface. The opening / closing strip connects to the pre-reserved curved surface and the soft pouch, and extends along the extension direction of the pre-reserved curved surface. The soft pouch forms a partition space, which is either connected to or separated from the main storage space. The opening / closing strip is equipped with a detachable structure, which can open or close the partition space. The notch in the hard-shell body reduces the weight of the multi-functional hard-shell backpack; furthermore, the soft pouch enriches the partitioning and opening / closing methods of the multi-functional hard-shell backpack, allowing it to combine the functionality of a hard-shell backpack with the practicality of multi-functional partitioning.

[0028] By cutting open sections of the hard-shell main body to create notches and replacing them with soft bags, the weight is significantly reduced while adding multiple opening and closing methods and compartments, improving the practicality of the multi-functional hard-shell backpack. It retains the inherent advantages of a hard-shell backpack—sturdiness, wear resistance, and stain resistance—resulting in a lighter, more convenient, and more functional multi-functional hard-shell backpack that better meets market demands. This combination of hard and soft materials better satisfies the need for convenient storage and retrieval of items in various usage scenarios, thus expanding the market prospects for hard-shell backpacks. Attached Figure Description

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 An exploded view of the multifunctional hard-shell backpack provided in the embodiments of this application;

[0031] Figure 2 A three-dimensional structural diagram of the multifunctional hard-shell backpack provided in the embodiments of this application;

[0032] Figure 3 A front view of the multi-functional hard-shell backpack provided in the embodiments of this application;

[0033] Figure 4 Rear view of a multi-functional hard-shell backpack provided in an embodiment of this application;

[0034] Figure 5 A side view of a multi-functional hard-shell backpack provided in an embodiment of this application;

[0035] Figure 6 A top view of the multi-functional hard-shell backpack provided in the embodiments of this application;

[0036] Figure 7 This is a schematic diagram of the structure of the hard-shell main body in the multifunctional hard-shell backpack provided in the embodiments of this application;

[0037] Figure 8 This is a schematic diagram of the cutting of a multi-functional hard-shell backpack provided in an embodiment of this application;

[0038] Figure 9 An enlarged view of the first reserved curved surface in the multifunctional hard-shell backpack provided in the embodiments of this application;

[0039] Figure 10 An enlarged view of the second reserved curved surface in the multifunctional hard-shell backpack provided in the embodiments of this application;

[0040] Figure 11 A three-dimensional schematic diagram of the hard-shell main body of the multifunctional hard-shell backpack provided in the embodiments of this application;

[0041] Figure 12 Schematic diagram of the reserved curved surface direction in the multifunctional hard-shell backpack provided in this application embodiment Figure 1 ;

[0042] Figure 13 Schematic diagram of the reserved curved surface direction in the multifunctional hard-shell backpack provided in this application embodiment Figure 2 .

[0043] icon:

[0044] A1 - Top of the hard shell; A2 - First sidewall; A3 - Second sidewall; A - Main body of the hard shell;

[0045] Y0 - Reserved distance; Y1 - First reserved surface; Y2 - Second reserved surface; Y3 - Third reserved surface; Y4 - Fourth reserved surface;

[0046] K1 - Flap pocket; K2 - Second closure pocket; K3 - Third closure pocket;

[0047] B - Soft body; C - Buckle;

[0048] L1 - First opening and closing bar; L2 - Second opening and closing bar; L3 - Third opening and closing bar; L4 - Fourth opening and closing bar. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0050] In the description of this application, it should be noted that the terms "inner" and "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0051] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0052] Currently, hard-shell backpacks are limited to a single, openable design and are often too heavy. This doesn't meet the actual needs of backpack consumers, as the shells are typically injection-molded or vacuum-formed, presenting significant design and manufacturing challenges and limitations, hindering detailed design and processing. Consequently, the market is flooded with simple, openable hard-shell backpacks. However, these backpacks are inefficient for organization, retrieval, and carrying. For example, frequently used pockets like those for phones and cards, or separate compartments on the sides for water bottles or shoes, are not found in current hard-shell backpacks. The simplistic, unorganized opening mechanism significantly impacts the user experience. Furthermore, the excessive weight of hard-shell backpacks greatly increases the user's burden. While hard-shell backpacks are sturdy and offer strong protection for the interior, and may have stylish colors and designs, their overall practicality is inferior to traditional backpacks. With economic development and societal progress, they fail to meet diverse user needs, limiting market size. Most hard-shell backpacks on the market today fail to address two main issues. First, they lack a simple and straightforward opening mechanism, which directly impacts compartmentalized storage and retrieval, limiting their practicality and application scenarios. Second, they are too heavy. While the sturdiness of the hard shell offers advantages in internal protection, the excessive weight deters many consumers, limiting the user base and market potential of hard-shell backpacks.

[0053] See Figures 1 to 13 In view of this, the multifunctional hard-shell backpack provided in this embodiment of the utility model includes a hard-shell body A, a soft bag, and an opening and closing strip; the hard-shell body A forms a main storage space and is provided with a notch communicating with the main storage space, and the edge of the notch is provided with a reserved curved surface; the opening and closing strip is connected to the reserved curved surface and the soft bag, and the opening and closing strip extends along the extension direction of the reserved curved surface; the soft bag forms a partition space, which is connected to or separated from the main storage space, and the opening and closing strip is equipped with a detachable structure, which can open or close the partition space.

[0054] Specifically, the detachable structure of the opening and closing strip can be configured as a zipper or a structure with a thin metal and rubber seal, allowing the compartment to be opened or closed, thus enabling users to store or retrieve items from the compartment. Furthermore, the hard shell body A is made of polyester plastic, although it can also be made of EVA, carbon fiber, metal, etc.

[0055] The hard-shell main body A features a notch, reducing the weight of the multi-functional hard-shell backpack. Furthermore, the soft pouch enriches the backpack's compartmentalization and opening / closing methods, allowing it to balance the functionality of a hard-shell backpack with the practicality of multi-functional compartments. By cutting a section of the hard-shell main body A to create a notch and replacing it with a soft pouch, the weight is significantly reduced while increasing various opening / closing methods and compartments, improving the practicality of the multi-functional hard-shell backpack. It retains the inherent advantages of a hard-shell backpack—sturdiness, wear resistance, and stain resistance—resulting in a lighter, more convenient, and more functional multi-functional hard-shell backpack that better meets market demands. This combination of hard and soft materials better satisfies the need for convenient storage and retrieval of items in various usage scenarios, expanding the market prospects for hard-shell backpacks.

[0056] The following is a detailed description of the structure and shape of the multi-functional hard-shell backpack:

[0057] In an optional embodiment of this utility model, the width of the reserved curved surface is greater than 1 cm.

[0058] The width of the reserved curved surface is greater than 1cm to facilitate the connection between the reserved curved surface and the opening and closing strip.

[0059] In an optional embodiment of this utility model, the notch includes a first notch, the reserved curved surface includes a first reserved curved surface Y1, and the soft bag includes a cover bag K1, which covers the first notch. The first notch is located at the top of the hard shell body A, and the edge of the first notch is provided with the first reserved curved surface Y1, which extends along the top curved surface shape direction of the hard shell body A. The angle formed by the tangent of the curved edge of the first reserved curved surface Y1 and the hard shell body A and the horizontal plane is X1+90°, and X1≤90°. The angle formed by the tangent of the first reserved curved surface Y1 and the horizontal plane is Z1, and the direction of the first reserved curved surface Y1 is set within the range of Z1. X1 and Z1 are complementary angles, and X1 and Z1 must be 90° apart.

[0060] Specifically, based on the principles of vacuum forming and the operational standards of plastic sewing, the traditional one-piece molded hard shell is functionally improved. The top A1 portion of the hard shell is cut off, and a first opening strip L1 is added for opening and closing, connecting to the top cover bag K1. The cut edge between the hard shell body A and the top A1 of the hard shell body needs to leave a curved surface with a distance of more than 1cm inward into the hard shell body A, called the first reserved curved surface Y1, which is used to connect the cover strip K1. The reserved curved surface Y1 needs to extend along the shape direction of the top curved surface of the hard shell body A. Because the curved surface where the hard shell body A and the first reserved curved surface Y1 meet is a curved surface that changes with the shape, the tangent at each point on the edge is changing. Therefore, the protection range is defined by the angle range of the plane where the tangent of the curved surface lies, with the horizontal plane as the reference. The angle formed by the tangent of the edge of the hard shell body A and the first reserved curved surface Y1 and the horizontal plane is X1+90° and X1≤90°. The angle formed by the tangent of the first reserved curved surface Y1 and the horizontal plane is Z1. The direction of the first reserved curved surface Y1, i.e. the direction of the tangent, must exist within the range of Z1. The range of X1 and Z1 is a complementary angle Z1=180°-X1, and the two sides of X1 and Z1 must be 90° apart.

[0061] The design aims to reduce area and weight by 15%, and adds a top vertical first opening strip L1, along with a lightweight molded top flap pocket K1. This is for storing small items such as mobile phones or cardholders. It can be integrated into the main storage space or be independent of it. The main purpose is to facilitate retrieval by opening from the top, because the entire hard shell is heavy and the zipper circumference is long. The overall opening method is not convenient for frequently used small items. Therefore, this opening and partitioned flap pocket K1 are added. The flap K1 opens from the top and bottom, so when opening to retrieve items, the items inside are less likely to tip over or scatter, thus ensuring a better user experience.

[0062] In an optional embodiment of this utility model, a reserved distance Y0 is provided between the top edge of the hard shell body A and the inner wall of the first notch.

[0063] Specifically, the edge of the cut-out portion at the top A1 of the hard shell body needs to be at least 1.5cm away from the top edge of the hard shell body A, referred to as the reserved distance Y0. This distance ensures the joining distance and also provides space for the flap K1 when it is opened. The perimeter of the connection between the flap K1 and the hard shell body A needs to be consistent with the perimeter of the hard shell body A after removing the first reserved curved surface Y1. In this embodiment, the reserved distance Y0 is greater than 1.5cm.

[0064] The reserved distance Y0 ensures the connection distance on the one hand, and provides space for the cover bag K1 after it is opened.

[0065] In an optional embodiment of this utility model, the notch includes a second notch, the reserved curved surface includes a second reserved curved surface Y2, the soft bag includes a second opening pocket K2, and the second opening pocket K2 covers the second notch; the second notch is located on one side of the hard shell body A, the edge of the second notch is provided with the second reserved curved surface Y2, and the second reserved curved surface Y2 extends along the curved surface shaping direction on both sides of the hard shell body A; the angle formed by the second reserved curved surface Y2 and the tangent of the curved surface edge connected to the hard shell body A and the horizontal plane is X2+90°, and X2≤90°; the angle range formed by the tangent of the second reserved curved surface Y2 and the horizontal plane is Z2, the direction of the second reserved curved surface Y2 is set within the range of Z2, X2 and Z2 are complementary angles, and X2 and Z2 need to be 90° apart. The notch includes a third notch, the reserved curved surface includes a third reserved curved surface Y3, the soft bag includes a third opening pocket K3, and the third opening pocket K3 covers the third notch; the second and third notches are located on both sides of the hard shell body A, the edge of the third notch is provided with a third reserved curved surface Y3, and the third reserved curved surface Y3 extends along the curved surface shape direction on both sides of the hard shell body A; the angle formed by the third reserved curved surface Y3 and the tangent of the curved surface edge that connects with the hard shell body A and the horizontal plane is X3+90°, and X3≤90°; the angle formed by the tangent of the third reserved curved surface Y3 and the horizontal plane is Z3, the direction of the third reserved curved surface Y3 is set within the range of Z3, X3 and Z3 are complementary angles, and X3 and Z3 must be 90° apart.

[0066] Specifically, the first sidewall A2 and the second sidewall A3 of the hard shell are cut off, and a second opening strip L2 and a third opening strip L3 are added to connect the second opening pockets K2 and the third opening pockets K3 on both sides, respectively. After cutting the top A1, the second sidewall A3, and the third sidewall A3 of the hard shell, the hard shell body A is obtained. The hard shell body A and the cut edges of the first sidewall A2 and the second sidewall A3 need to leave a distance of more than 1 cm, which is called the second reserved curved surface Y2 and the third reserved curved surface Y3. The direction of the second reserved curved surface Y2 and the third reserved curved surface Y3 needs to extend along the curved surface shape direction on both sides of the hard shell body A. The angles formed by the tangents of the edges of the hard shell body A and the second reserved curved surface Y2 and the third reserved curved surface Y3 and the horizontal plane are X2+90° and X2≤90°, and X3+90° and X3≤90°, respectively. The angles formed by the tangents of the second reserved curved surface Y2 and the third reserved curved surface Y3 and the horizontal plane are Z2 and Z3, respectively. The curvature directions of the second reserved curved surface Y2 and the third reserved curved surface Y3, i.e., the tangent directions, must exist within the range of Z2 and Z3. The range of X2 angle and Z2 angle are complementary angles Z2 = 180° - X2, and the two sides of X2 angle and Z2 angle must be 90° apart by right angles. The range of X3 angle and Z3 angle are complementary angles Z3 = 180° - X3, and the two sides of X3 angle and Z3 angle must be 90° apart by right angles. The perimeter of the connection between the second opening pocket K2 and the third opening pocket K3 on both sides and the hard shell body A is consistent with the perimeter of the hard shell body A after removing the reserved distance Y0 of the second reserved curved surface Y2 and the third reserved curved surface Y3.

[0067] The design aims to reduce area and weight by 40%, replacing the original pockets with lightweight materials. These pockets feature two horizontal opening strips, L2 and L3, connecting the second and third opening pockets (K2 and K3) to serve as second and third retrieval openings and partitions. A single, integrated opening is not conducive to functional partitioning and isolation, nor to retrieving isolated items. The interiors of the second and third opening pockets (K2 and K3) can connect to the main storage space or be divided into separate compartments, providing independent storage for water bottles or dirty shoes, making them suitable for various usage scenarios.

[0068] In an optional embodiment of this utility model, the notch includes a fourth notch, the reserved curved surface includes a fourth reserved curved surface Y4, the soft bag includes a soft bag body B, and the soft bag body B is covered by the fourth notch; the fourth notch is located on the back of the hard shell body A, and the edge of the fourth notch is provided with the fourth reserved curved surface Y4; the angle formed by the tangent of the edge of the curved surface where the fourth reserved curved surface Y4 connects with the hard shell body A and the horizontal plane is X4 = 90° and X ≤ 90°; the angle range formed by the tangent of the fourth reserved curved surface Y4 and the horizontal plane is Z4, the direction of the fourth reserved curved surface Y4 is set within the range of Z4, X4 and Z4 are complementary angles, and X4 and Z4 need to be 90° apart.

[0069] Specifically, a fourth opening and closing strip L4 is provided for overall opening and closing, connecting to the soft package B. A distance of at least 1cm must be reserved at the curved edge of the connection between the hard shell A and the soft package B. This reserved curved surface Y4 is used to connect the hard shell A and the soft package B. The curvature of the fourth reserved curved surface Y4 must be horizontal to the direction of the curvature extension of the hard shell A. The angle formed by the tangent of the connecting curved edge of the hard shell A and the fourth reserved curved surface Y4 and the horizontal plane is X4 + 90°, and X4 ≤ 90°. The angle range formed by the tangent of the fourth reserved curved surface Y4 and the horizontal plane is Z4. The curvature direction of the fourth reserved curved surface Y4, i.e., the direction of the tangent, must exist within the range of Z4. The ranges of X4 and Z4 form a complementary angle Z4 = 180° - X4, and the two sides of X4 and Z4 must be 90° apart.

[0070] A horizontal fourth opening strip L4 is provided at the connection between the hard shell A and the soft package B, or on the soft package B, connecting the soft package B. This is suitable for storing and retrieving items within the main storage space, such as large items like laptops.

[0071] In an optional embodiment of this utility model, a plurality of buckles C are installed on the side wall of the soft bag body B, and the plurality of buckles C are spaced apart circumferentially along the soft bag body B. The soft bag body B is provided with two opposing shoulder straps.

[0072] Multiple sets of buckles C are added around the soft part B. These buckles C are used to connect other waist bags, small bags, or net bags, as well as functional product combinations such as straps, to further increase functionality and practicality.

[0073] A brand-new multi-functional hard-shell backpack includes a hard-shell main body A, three sets of soft panels: a flap pocket K1, a second closure pocket K2, and a third closure pocket K3, and a soft bag body B. The multi-opening mechanism of the multi-functional hard-shell backpack not only reduces the weight and recyclability of the hard-shell flap by 50%, but also enriches the partitioning and opening methods of the hard-shell bag body by replacing the three sets of lightweight soft closure pockets. After installing buckles C, shoulder straps, and EVA soft materials on the soft bag body B, the two are combined to achieve the functionality and practicality of the backpack, while also taking into account the sturdiness and fashion characteristics of the hard-shell backpack.

[0074] It should be noted that, unless there is any conflict, the features in the embodiments of this application can be combined with each other.

[0075] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A multi-functional hard-shell backpack, characterized in that, include: Hard shell body (A), soft bag and opening / closing strip; The hard shell body (A) forms a main receiving space and has a notch communicating with the main receiving space, and the edge of the notch has a reserved curved surface; The opening and closing strip is connected to the reserved curved surface and the soft bag, and the opening and closing strip extends along the extension direction of the reserved curved surface; The soft bag forms a partition space, which is connected to or separated from the main receiving space. The opening and closing strip is equipped with a detachable structure, which can open or close the partition space.

2. The multifunctional hard-shell backpack according to claim 1, characterized in that, The width of the reserved curved surface is greater than 1 cm.

3. The multifunctional hard-shell backpack according to claim 2, characterized in that, The notch includes a first notch, the reserved curved surface includes a first reserved curved surface (Y1), the soft bag includes a cover bag (K1), and the cover bag (K1) covers the first notch; The first notch is located at the top of the hard shell body (A), and the edge of the first notch is provided with the first reserved curved surface (Y1). The first reserved curved surface (Y1) extends along the top curved surface shape direction of the hard shell body (A). The angle formed by the tangent of the edge of the first reserved curved surface (Y1) and the curved surface of the hard shell body (A) and the horizontal plane is X1+90°, and X1≤90°; The angle between the tangent of the first reserved curved surface (Y1) and the horizontal plane is Z1. The direction of the first reserved curved surface (Y1) is set within the range of Z1. X1 and Z1 are complementary angles, and X1 and Z1 must be 90° apart.

4. The multifunctional hard-shell backpack according to claim 3, characterized in that, The top edge of the hard shell body (A) has a reserved distance (Y0) between it and the inner wall of the first notch.

5. The multi-functional hard-shell backpack according to claim 4, characterized in that, The reserved distance (Y0) is greater than 1.5cm.

6. The multifunctional hard-shell backpack according to claim 2, characterized in that, The notch includes a second notch, the reserved curved surface includes a second reserved curved surface (Y2), the soft bag includes a second opening pocket (K2), and the second opening pocket (K2) covers the second notch; The second notch is located on one side of the hard shell body (A), and the edge of the second notch is provided with the second reserved curved surface (Y2), and the second reserved curved surface (Y2) extends along the curved surface shaping direction on both sides of the hard shell body (A); The angle formed by the tangent of the second reserved curved surface (Y2) and the edge of the curved surface that connects with the hard shell body (A) and the horizontal plane is X2+90°, and X2≤90°; the angle formed by the tangent of the second reserved curved surface (Y2) and the horizontal plane is Z2, the direction of the second reserved curved surface (Y2) is set within the range of Z2, X2 and Z2 are complementary angles, and X2 and Z2 must be 90° apart.

7. The multifunctional hard-shell backpack according to claim 6, characterized in that, The notch includes a third notch, the reserved curved surface includes a third reserved curved surface (Y3), the soft bag includes a third closing pocket (K3), and the third closing pocket (K3) covers the third notch; The second notch and the third notch are located on both sides of the hard shell body (A), and the edge of the third notch is provided with the third reserved curved surface (Y3), and the third reserved curved surface (Y3) extends along the curved surface shaping direction on both sides of the hard shell body (A); The angle formed by the tangent of the edge of the third reserved curved surface (Y3) and the curved surface that connects with the hard shell body (A) and the horizontal plane is X3+90°, and X3≤90°; the angle formed by the tangent of the third reserved curved surface (Y3) and the horizontal plane is Z3, the direction of the third reserved curved surface (Y3) is set within the range of Z3, X3 and Z3 are complementary angles, and X3 and Z3 must be 90° apart.

8. The multifunctional hard-shell backpack according to claim 2, characterized in that, The notch includes a fourth notch, the reserved curved surface includes a fourth reserved curved surface (Y4), the soft bag includes a soft package (B), and the soft package (B) covers the fourth notch; The fourth notch is located on the back of the hard shell body (A), and the edge of the fourth notch is provided with the fourth reserved curved surface (Y4); the angle formed by the tangent of the edge of the fourth reserved curved surface (Y4) and the hard shell body (A) and the horizontal plane is X4 = 90° and X ≤ 90°; the angle formed by the tangent of the fourth reserved curved surface (Y4) and the horizontal plane is Z4, and the direction of the fourth reserved curved surface (Y4) is set within the Z4 range. X4 and Z4 are complementary angles, and X4 and Z4 must be 90° apart.

9. The multifunctional hard-shell backpack according to claim 8, characterized in that, The soft package (B) has multiple buckles (C) installed on its sidewalls, and the multiple buckles (C) are spaced apart along the circumference of the soft package (B).

10. The multifunctional hard-shell backpack according to claim 9, characterized in that, The soft package (B) is provided with two opposing shoulder straps.

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