A backpack having a composite layer

Abstract

This invention relates to the field of backpack technology and discloses a backpack with a composite layer, comprising a main backpack with a horizontal zipper fixedly connected to its end face, an auxiliary backpack fixedly connected to the surface of the horizontal zipper away from the main backpack, a side bag fixedly connected to the surface of the main backpack near the horizontal zipper, an end bag fixedly connected to the surface of the main backpack away from the side bag, and a control component fixedly connected to the inner wall of the main backpack away from the end bag. When the auxiliary backpack is needed, the connecting fabric engages with the surfaces of the pull rods at both ends, and the insert sleeve engages along the surface of the connecting fabric, allowing the connecting straps to be worn. When the auxiliary backpack is not in use, the connecting fabric and pull rods are separated, the insert sleeve is separated from the connecting fabric, and then the insert sleeve is inserted along the surface of the rotating fabric, allowing the connecting straps to be worn. During wearing, the internal control box controls the rotation of the uprights according to the amount of connecting straps used by the user.

Description

Technical Field

[0001] This invention relates to the field of backpack equipment technology, specifically a backpack with a composite layer. Background Technology

[0002] Backpacks with composite layers are backpacks made using composite fabric technology. By bonding multiple layers of different functional materials together, the backpack can simultaneously take into account multiple performance characteristics. This is currently a mainstream design technology in the backpack industry, aiming to balance lightweight, durability, waterproofness, and functionality.

[0003] Most existing composite layer backpacks use sponge interlayer or ordinary mesh composite fabric for the back lining, which only relies on the gaps in the fabric to achieve passive ventilation and lacks an active air-guiding and heat dissipation structure. When users carry the backpack for a long time, the back is tightly pressed against the backpack, the air circulation on the back is blocked, and sweat accumulates and cannot be dissipated quickly, which can easily lead to stuffiness, discomfort, and poor carrying comfort. Summary of the Invention

[0004] The purpose of this invention is to provide a backpack with a composite layer to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a backpack with a composite layer, comprising a main backpack, a horizontal zipper fixedly connected to one end face of the main backpack, an auxiliary backpack fixedly connected to the surface of the horizontal zipper away from the main backpack, and a side bag fixedly connected to the surface of the main backpack near the horizontal zipper, and further comprising: A layered component, the layered component including a connecting pull surface, the surface of the connecting pull surface being provided with a connecting block, and a stop surface being fixedly connected to the surface of the connecting block on the side away from the connecting pull surface; A cross-back component, the cross-back component including a column, a slider threadedly connected to the surface of the column, and a vertical plate fixedly connected to the surface of the slider away from the column; An auxiliary component includes an inner plastic plate, an arc plate fixedly connected to the surface of the inner plastic plate, and a perforated plate fixedly connected to the inner wall of the inner plastic plate near the arc plate.

[0006] Furthermore, an end bag is fixedly connected to the surface of the main backpack away from the side bags, and a control component is fixedly connected to the inner wall of the main backpack away from the end bag. An inner control box is provided on the inner wall of the main backpack near the control component. There are two side bags, which are symmetrically distributed around the surface of the main backpack. There are four control components, which are divided into two groups, with two components in each group. One group of control components is symmetrically distributed around the surface of the main backpack, and the other group of control components is symmetrically distributed around the surface of the auxiliary backpack. There are two inner control boxes, which are equidistantly distributed along the inner wall of the main backpack.

[0007] Furthermore, the layered component includes an auxiliary connecting bag, wherein the surface of the connecting block away from the stop is fixedly connected to the surface of the auxiliary backpack away from the horizontal zipper, and two connecting blocks are provided, the two connecting blocks being symmetrically distributed with respect to the surface of the stop, and the surface of the auxiliary connecting bag near the connecting block is fixedly connected to the surface of the auxiliary backpack.

[0008] Furthermore, the inner wall of the main backpack is fixedly connected with a diagonal fabric, and the surface of the diagonal fabric away from the main backpack is fixedly connected with a diagonal zipper. The inner wall of the main backpack near the diagonal fabric is fixedly connected with an inner compartment, and the surface of the inner compartment near the diagonal zipper is fixedly connected with an inner zipper. The number of diagonal fabrics is set to four, and the four diagonal fabrics are divided into two groups, with two fabrics in each group. The two groups of diagonal fabrics are symmetrically distributed with respect to the inner wall of the main backpack. The number of inner zippers is set to two, and the two inner zippers are symmetrically distributed with respect to the surface of the inner compartment.

[0009] Furthermore, the cross-back component includes a horizontal shaft, the surface of which is fixedly connected to a rotating cloth. Two uprights are provided, symmetrically distributed around the inner wall of the control component. The surface of the slider near the upright is slidably connected to the inner wall of the control component. The two end faces of the upright are rotatably connected to the inner wall of the inner control box. The horizontal shaft is rotatably connected to the inner wall of the upright plate. Two horizontal shafts are provided, symmetrically distributed around the surface of the upright plate. The inner walls of both ends of the rotating cloth are fixedly connected to the surface of the horizontal shaft.

[0010] Furthermore, a pull rod is provided on the inner wall of the rotating fabric near the horizontal axis. A connecting fabric is inserted into the surface of the pull rod away from the rotating fabric. A rod sleeve is provided on the surface of the connecting fabric away from the pull rod. A connecting shoulder strap is fixedly connected to the surface of the rod sleeve away from the connecting fabric. The two end faces of the connecting fabric are snapped into the surface of the pull rod. The end face of the connecting shoulder strap away from the rod sleeve is fixedly connected to the surface of the main backpack.

[0011] Furthermore, the auxiliary component includes a vent, the surface of the inner plastic plate is fixedly connected to the inner wall of the main backpack, there are two arc plates, the two arc plates are symmetrically distributed on the surface of the inner plastic plate, the surface of the arc plate away from the inner plastic plate is fixedly connected to the inner wall of the main backpack, the surface of the perforated plate away from the inner plastic plate is fixedly connected to the inner wall of the main backpack, and the vent is opened on the surface of the main backpack near the perforated plate.

[0012] Furthermore, a baffle is fixedly connected to the surface of the inner control box away from the main backpack, an air-insulating plate is fixedly connected to the surface of the inner control box away from the baffle, a fan is rotatably connected to the surface of the inner control box near the baffle, the surface of the baffle away from the inner control box is fixedly connected to the inner wall of the inner plastic panel, and the surface of the air-insulating plate away from the inner control box is engaged with the inner wall of the main backpack.

[0013] The present invention has the following beneficial effects: This invention connects the main backpack and the auxiliary backpack with a horizontal zipper. With the help of the connecting zipper, connecting block, stop, and auxiliary connecting bag of the layered components, the auxiliary backpack can be pulled out or folded up as needed to expand and shrink the volume. With the help of the diagonal fixed cloth, diagonal zipper, inner compartment and inner zipper, the empty space inside the bag can be compressed and the items can be limited. Small items can be stored separately and sealed, realizing hierarchical storage and neat arrangement of items.

[0014] This invention utilizes a disassembly and assembly structure consisting of a pull rod, connecting cloth, insert sleeve, and rotating cloth. The fixed position of the shoulder straps can be switched depending on whether the auxiliary backpack is used or not. The internal control box drives the column to rotate, which in turn drives the slider, upright plate, and horizontal axis to move in linkage through threaded engagement, adaptively adjusting the installation position of the shoulder straps to suit different body shapes and loads, and optimizing the carrying force.

[0015] This invention uses an inner plastic plate, an arc plate, and a perforated plate to form a flexible support structure for the back panel, which can conform to the back of the human body and play a cushioning role; the inner control box, fan, baffle, and air-proof plate, together with the ventilation holes, form an air guiding channel. The fan blows air onto the back through the perforated plate and ventilation holes, which accelerates the evaporation of sweat and solves the problem of stuffiness during long-term carrying.

[0016] This invention features symmetrical side and end pockets on the main backpack, facilitating the categorization and storage of loose items. Multiple control components located on the main and auxiliary backpacks serve as mounting bases for the cross-back components, enhancing the backpack's shape retention, effectively preventing load-bearing deformation, and improving the backpack's durability.

[0017] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a rear view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the layered component structure of the present invention; Figure 4 This is a schematic diagram of the inner diaphragm structure of the present invention; Figure 5 This is a schematic diagram of the cross-back component structure of the present invention; Figure 6 This is a rear view of the cross-back component structure of the present invention; Figure 7 This is a schematic diagram of the auxiliary component structure of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of part A in the image.

[0020] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Layered components; 2. Cross-back components; 3. Auxiliary components; 4. Control components; 5. Internal control box; 6. Main backpack; 7. Horizontal zipper; 8. Auxiliary backpack; 9. Side pockets; 10. End pockets; 11. Connecting zipper; 12. Connecting block; 13. Baffle; 14. Auxiliary connecting bag; 15. Diagonal reinforcement fabric; 16. Diagonal zipper; 17. Inner compartment; 18. Inner zipper; 21. Upright column; 22. Slider; 23. Upright plate; 24. Horizontal axis; 25. Rotating fabric; 26. Pull rod; 27. Connecting fabric; 28. Insert rod sleeve; 29. ​​Connecting shoulder strap; 31. Inner plastic panel; 32. Curved plate; 33. Perforated plate; 34. Ventilation hole; 35. Baffle; 36. Fan; 37. Air barrier. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-8As shown, the present invention is a backpack with a composite layer, including a main backpack 6, a horizontal zipper 7 fixedly connected to the end face of the main backpack 6, an auxiliary backpack 8 fixedly connected to the surface of the horizontal zipper 7 away from the main backpack 6, and a side bag 9 fixedly connected to the surface of the main backpack 6 near the horizontal zipper 7, and further including: Layered component 1 includes a connecting zipper 11. A connecting block 12 is provided on the surface of the connecting zipper 11. A stop surface 13 is fixedly connected to the surface of the connecting block 12 away from the connecting zipper 11. Depending on the amount of backpack usage required, when the usage is high, the auxiliary backpack 8 is pulled out in the opposite direction of the main backpack 6, and then the connecting zipper 11 is used to zip open and close the end face of the auxiliary backpack 8. The crossbody component 2 includes a column 21, a slider 22 threadedly connected to the surface of the column 21, and a vertical plate 23 fixedly connected to the surface of the slider 22 away from the column 21. When wearing the crossbody, the internal control box 5 controls the column 21 to rotate according to the amount of the connecting strap 29 used by the user. The column 21 drives the slider 22 to slide along the inner wall of the internal control box 5 through the threaded connection on its surface. The slider 22 then drives the vertical plate 23 to move, and the vertical plate 23 drives the horizontal axis 24 to move, so that the connecting strap 29 can be used better according to the position. The auxiliary component 3 includes an inner plastic plate 31, an arc plate 32 is fixedly connected to the surface of the inner plastic plate 31, and a perforated plate 33 is fixedly connected to the inner wall of the inner plastic plate 31 near the arc plate 32. When the user carries the backpack, the inner plastic plate 31 is a malleable baffle that will better block the user's back.

[0023] An end bag 10 is fixedly connected to the surface of the main backpack 6 away from the side bag 9. A control component 4 is fixedly connected to the inner wall of the main backpack 6 away from the end bag 10. An inner control box 5 is provided on the inner wall of the main backpack 6 near the control component 4. There are two side bags 9, which are symmetrically distributed on the surface of the main backpack 6. There are four control components 4, which are divided into two groups, with two components in each group. One group of control components 4 is symmetrically distributed on the surface of the main backpack 6, and the other group of control components 4 is symmetrically distributed on the surface of the auxiliary backpack 8. There are two inner control boxes 5, which are equidistantly distributed along the inner wall of the main backpack 6.

[0024] The layered component 1 includes an auxiliary connecting bag 14. A stop 13 is used to pull along the surface of the connecting block 12, so that the stop 13 is pulled to the surface of the auxiliary connecting bag 14 to protect the end face of the backpack. The surface of the connecting block 12 away from the stop 13 is fixedly connected to the surface of the auxiliary backpack 8 away from the horizontal zipper 7. There are two connecting blocks 12, which are symmetrically distributed with respect to the surface of the stop 13. The surface of the auxiliary connecting bag 14 near the connecting block 12 is fixedly connected to the surface of the auxiliary backpack 8.

[0025] The inner wall of the main backpack 6 is fixedly connected with a diagonal fabric 15. A diagonal zipper 16 is fixedly connected to the surface of the diagonal fabric 15 away from the main backpack 6. An inner compartment 17 is fixedly connected to the inner wall of the main backpack 6 near the diagonal fabric 15. An inner zipper 18 is fixedly connected to the surface of the inner compartment 17 near the diagonal zipper 16. When the usage is light, the auxiliary backpack 8 can be pulled along the inner wall of the main backpack 6, or the horizontal zipper 7 can be opened directly to separate the auxiliary backpack 8. Simultaneously, when the backpack is used infrequently, it can be placed only in the inner compartment 17, and then the inner zippers 18 on both sides of the inner compartment 17 can be pulled to access the inner compartment 17. When the backpack is sealed by pulling and closing, and the amount of backpack items to be used is limited, the diagonal zipper 16 of each group can be pulled to pull the diagonal fixing cloth 15 inward, thereby limiting the internal space of the backpack and restricting the placement of items, thus improving the backpack's usability. There are four diagonal fixing cloths 15, which are divided into two groups, with two cloths in each group. The two groups of diagonal fixing cloths 15 are symmetrically distributed on the inner wall of the main backpack 6. There are two inner zippers 18, which are symmetrically distributed on the surface of the inner compartment 17.

[0026] The cross-back component 2 includes a horizontal shaft 24, on the surface of which a rotating cloth 25 is fixedly connected. There are two uprights 21, which are symmetrically distributed around the inner wall of the control component 4. The surface of the slider 22 near the upright 21 is slidably connected to the inner wall of the control component 4. The two end faces of the uprights 21 are rotatably connected to the inner wall of the inner control box 5. The horizontal shaft 24 is rotatably connected to the inner wall of the upright plate 23. There are two horizontal shafts 24, which are symmetrically distributed around the surface of the upright plate 23. The inner walls of the two ends of the rotating cloth 25 are fixedly connected to the surface of the horizontal shaft 24.

[0027] A pull rod 26 is provided on the inner wall of the rotating fabric 25 near the horizontal axis 24. A connecting fabric 27 is inserted into the surface of the pull rod 26 away from the rotating fabric 25. A pole sleeve 28 is provided on the surface of the connecting fabric 27 away from the pull rod 26. A connecting shoulder strap 29 is fixedly connected to the surface of the pole sleeve 28 away from the connecting fabric 27. When the auxiliary backpack 8 is needed, the connecting fabric 27 is snapped onto the surfaces of the pull rods 26 at both ends, and the pole sleeve 28 is snapped along the surface of the connecting fabric 27, so that the connecting shoulder strap 29 can be worn on the back. When the auxiliary backpack 8 is not used, the connecting fabric 27 and the pull rod 26 are separated, and the pole sleeve 28 is separated from the connecting fabric 27. Then, the pole sleeve 28 is inserted along the surface of the rotating fabric 25, so that the connecting shoulder strap 29 can be worn on the back. The two end faces of the connecting fabric 27 are snapped onto the surfaces of the pull rods 26, and the end face of the connecting shoulder strap 29 away from the pole sleeve 28 is fixedly connected to the surface of the main backpack 6.

[0028] The auxiliary component 3 includes a vent 34. The surface of the inner plastic plate 31 is fixedly connected to the inner wall of the main backpack 6. There are two arc plates 32, which are symmetrically distributed on the surface of the inner plastic plate 31. The surface of the arc plate 32 away from the inner plastic plate 31 is fixedly connected to the inner wall of the main backpack 6. The surface of the perforated plate 33 away from the inner plastic plate 31 is fixedly connected to the inner wall of the main backpack 6. The vent 34 is opened on the surface of the main backpack 6 near the perforated plate 33.

[0029] A baffle 35 is fixedly connected to the surface of the inner control box 5 away from the main backpack 6. A ventilator 37 is fixedly connected to the surface of the inner control box 5 away from the baffle 35. A fan 36 is rotatably connected to the surface of the inner control box 5 near the baffle 35. When wearing the backpack for a long time, in order to provide a better user environment, the inner control box 5 controls the fan 36 to rotate, and the fan 36 will generate a directional wind. The generated directional wind will blow along the inner wall of the inner plastic panel 31 and out along the perforated plate 33 and the ventilation hole 34. The generated directional wind will blow towards the user's back through the ventilator 37 to ventilate the user's back and prevent sweat from affecting the user's comfort after prolonged use. The surface of the baffle 35 away from the inner control box 5 is fixedly connected to the inner wall of the inner plastic panel 31, and the surface of the ventilator 37 away from the inner control box 5 is snapped into the inner wall of the main backpack 6.

[0030] In use, within the layered component 1, depending on the amount of backpack usage, when the usage is high, the auxiliary backpack 8 is pulled out in the opposite direction of the main backpack 6. Then, the connecting zipper 11 is used to open and close the end face of the auxiliary backpack 8. Next, the baffle 13 is pulled along the surface of the connecting block 12 to the surface of the auxiliary connecting bag 14 to protect the end face of the backpack. When the usage is low, the auxiliary backpack 8 is pulled along the inner wall of the main backpack 6, or the horizontal zipper 7 is directly opened to separate the auxiliary backpack 8. At the same time, when the backpack usage is too low, it can be placed only in the inner compartment 17. Then, the inner zippers 18 on both sides of the inner compartment 17 can be pulled to close and seal the inner compartment 17. When the backpack usage is limited, the diagonal zippers 16 of each group can be pulled to pull the diagonal fixing cloth 15 inward, thus limiting the space inside the backpack and restricting the placement of items, making the backpack more effective.

[0031] When using this invention, within the crossbody component 2, when the auxiliary backpack 8 is needed, the connecting fabric 27 engages with the surfaces of the pull rods 26 at both ends, and the insert sleeve 28 engages along the surface of the connecting fabric 27, allowing the connecting shoulder strap 29 to be worn. When the auxiliary backpack 8 is not used, the connecting fabric 27 and pull rods 26 are separated, and the insert sleeve 28 is separated from the connecting fabric 27. Then, the insert sleeve 28 is inserted along the surface of the rotating fabric 25, allowing the connecting shoulder strap 29 to be worn. During this process, the internal control box 5 controls the column 21 to rotate according to the user's usage of the connecting shoulder strap 29. The column 21 drives the slider 22 to slide along the inner wall of the internal control box 5 via a surface threaded connection. The slider 22 then drives the upright plate 23 to move, and the upright plate 23 drives the horizontal axis 24 to move, allowing for better use of the connecting shoulder strap 29 based on the user's position.

[0032] When this invention is in use, the inner plastic plate 31 inside the auxiliary component 3 acts as a malleable baffle when the user is carrying the backpack, providing better contact and protection for the user's back. When carrying the backpack for a long time, to provide a better user environment, the inner control box 5 controls the fan 36 to rotate, which generates a directional airflow. The directional airflow blows along the inner wall of the inner plastic plate 31 and out along the perforated plate 33 and the vent 34. The directional airflow also blows through the air barrier 37 onto the user's back, venting the user's back and preventing sweat from being trapped during prolonged use, which would affect the user's comfort.

[0033] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A backpack with a composite layer, comprising a main backpack (6), wherein a horizontal zipper (7) is fixedly connected to one end face of the main backpack (6), an auxiliary backpack (8) is fixedly connected to the surface of the horizontal zipper (7) away from the main backpack (6), and a side bag (9) is fixedly connected to the surface of the main backpack (6) near the horizontal zipper (7), characterized in that, Also includes: Layered component (1), the layered component (1) includes a connecting pull surface (11), the surface of the connecting pull surface (11) is provided with a connecting block (12), and a baffle (13) is fixedly connected to the surface of the connecting block (12) away from the connecting pull surface (11). The crossback component (2) includes a column (21), a slider (22) is threadedly connected to the surface of the column (21), and a plate (23) is fixedly connected to the surface of the slider (22) away from the column (21). The auxiliary component (3) includes an inner plastic plate (31), an arc plate (32) is fixedly connected to the surface of the inner plastic plate (31), and a perforated plate (33) is fixedly connected to the inner wall of the inner plastic plate (31) near the arc plate (32).

2. A backpack with a composite layer according to claim 1, characterized in that: The main backpack (6) has an end bag (10) fixedly connected to the surface of the side bag (9). The inner wall of the main backpack (6) is fixedly connected to the side bag (10). An inner control box (5) is provided on the inner wall of the main backpack (6) near the control box (4). There are two side bags (9), which are symmetrically distributed on the surface of the main backpack (6). There are four control boxes (4), which are divided into two groups, with two boxes in each group. One group of control boxes (4) is symmetrically distributed on the surface of the main backpack (6), and the other group of control boxes (4) is symmetrically distributed on the surface of the auxiliary backpack (8). There are two inner control boxes (5), which are equidistantly distributed along the inner wall of the main backpack (6).

3. A backpack with a composite layer according to claim 2, characterized in that: The layered component (1) includes an auxiliary connecting bag (14). The surface of the connecting block (12) away from the side panel (13) is fixedly connected to the surface of the auxiliary backpack (8) away from the side zipper (7). There are two connecting blocks (12), which are symmetrically distributed with respect to the surface of the side panel (13). The surface of the auxiliary connecting bag (14) near the connecting block (12) is fixedly connected to the surface of the auxiliary backpack (8).

4. A backpack with a composite layer according to claim 3, characterized in that: The inner wall of the main backpack (6) is fixedly connected with a diagonal fabric (15). The surface of the diagonal fabric (15) away from the main backpack (6) is fixedly connected with a diagonal zipper (16). The inner wall of the main backpack (6) near the diagonal fabric (15) is fixedly connected with an inner compartment (17). The surface of the inner compartment (17) near the diagonal zipper (16) is fixedly connected with an inner zipper (18). There are four diagonal fabrics (15). The four diagonal fabrics (15) are divided into two groups, and each group has two. The two groups of diagonal fabrics (15) are symmetrically distributed on the inner wall of the main backpack (6). There are two inner zippers (18). The two inner zippers (18) are symmetrically distributed on the surface of the inner compartment (17).

5. A backpack with a composite layer according to claim 4, characterized in that: The cross-back component (2) includes a horizontal shaft (24), on which a rotating cloth (25) is fixedly connected. There are two columns (21), which are symmetrically distributed on the inner wall of the control component (4). The surface of the slider (22) near the column (21) is slidably connected to the inner wall of the control component (4). The two end faces of the column (21) are rotatably connected to the inner wall of the inner control box (5). The horizontal shaft (24) is rotatably connected to the inner wall of the upright plate (23). There are two horizontal shafts (24), which are symmetrically distributed on the surface of the upright plate (23). The inner walls of the two ends of the rotating cloth (25) are fixedly connected to the surface of the horizontal shaft (24).

6. A backpack with a composite layer according to claim 5, characterized in that: A pull rod (26) is provided on the inner wall of the rotating fabric (25) near the horizontal axis (24). A connecting fabric (27) is inserted into the surface of the pull rod (26) away from the rotating fabric (25). A rod sleeve (28) is provided on the surface of the connecting fabric (27) away from the pull rod (26). A connecting shoulder strap (29) is fixedly connected to the surface of the rod sleeve (28) away from the connecting fabric (27). The two end faces of the connecting fabric (27) are snapped into the surface of the pull rod (26). The end face of the connecting shoulder strap (29) away from the rod sleeve (28) is fixedly connected to the surface of the main backpack (6).

7. A backpack with a composite layer according to claim 6, characterized in that: The auxiliary component (3) includes a ventilation hole (34). The surface of the inner plastic plate (31) is fixedly connected to the inner wall of the main backpack (6). There are two arc plates (32). The two arc plates (32) are symmetrically distributed on the surface of the inner plastic plate (31). The surface of the arc plate (32) away from the inner plastic plate (31) is fixedly connected to the inner wall of the main backpack (6). The surface of the perforated plate (33) away from the inner plastic plate (31) is fixedly connected to the inner wall of the main backpack (6). The ventilation hole (34) is opened on the surface of the main backpack (6) near the perforated plate (33).

8. A backpack with a composite layer according to claim 7, characterized in that: A baffle (35) is fixedly connected to the surface of the inner control box (5) away from the main backpack (6). A baffle plate (37) is fixedly connected to the surface of the inner control box (5) away from the baffle (35). A fan (36) is rotatably connected to the surface of the inner control box (5) near the baffle (35). The surface of the baffle (35) away from the inner control box (5) is fixedly connected to the inner wall of the inner plastic panel (31). The surface of the baffle plate (37) away from the inner control box (5) is snapped into the inner wall of the main backpack (6).

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