Backpack with limited door panel rotation angle at the back of the car

Abstract

The utility model relates to a kind of limited door panel rotation angle of automobile tail's storage backpack, including backpack body, door panel, slow descent device and hinge, the storage cavity is equipped in the backpack body, the door panel is hinged in the backpack body, the door panel rotates relative to the backpack body with hinge as rotation center, to open or close the storage cavity;The slow descent device is arranged in the storage cavity, one end of the slow descent device is connected with the storage cavity, the other end of the slow descent device is connected with the door panel, and the slow descent device is used to slow down the descending speed of the door panel;When the first page piece rotates 90 °, the door panel is in vertical state and closes the storage cavity, both improve use safety, and enhance the functionality of storage backpack.

Description

Technical Field

[0001] This utility model relates to a storage backpack with limited rotation angle of the door panel at the rear of a car. Background Technology

[0002] In the prior art, storage backpacks are often installed at the rear of automobiles to increase cargo space. They typically consist of a backpack body and a door panel hinged to the backpack body. The door panel rotates relative to the backpack body to open or close the storage cavity. However, they often use ordinary hinges or simple pull strap structures, which lack effective and clear limit control over the rotation angle of the door panel. After the door panel is opened, it is easy for it to continue to flip downwards or wobble, making it difficult to keep it stably in a basic horizontal position. It cannot be reliably used as a temporary small table or operating platform, and excessive rotation may affect the structural strength and safety of use, thereby reducing the practicality and functional expandability of the storage backpack. Utility Model Content

[0003] The purpose of this utility model is to provide a storage backpack for the rear door panel of a car with a limited rotation angle, where the rotation angle of the door panel is limited to the range of 0° to 90° and it has a stable small table function.

[0004] The purpose of this utility model is achieved as follows: A storage backpack with a limited rotation angle of the rear door panel of a car includes a backpack body, a door panel, a slow-descent device, and a hinge. The backpack body has a storage cavity. The door panel is hinged to the backpack body and rotates relative to the backpack body about the hinge point as the rotation center to open or close the storage cavity. The slow-descent device is disposed in the storage cavity, with one end connected to the storage cavity and the other end connected to the door panel. The slow-descent device is used to slow down the descent speed of the door panel. The hinge includes a first leaf and a second leaf, which are hinged together. The first leaf is connected to the door panel, and the second leaf is connected to the backpack body. The first leaf rotates around the hinge point as the rotation center, and the rotation angle of the first leaf is 0° to 90°. When the first leaf rotates 0°, the door panel is in a horizontal state and the storage cavity is open. When the first leaf rotates 90°, the door panel is in a vertical state and the storage cavity is closed.

[0005] By incorporating a storage cavity within the backpack body and hinged the door panel to the backpack body with the hinge point as the rotation center, and installing a slow-descent device within the storage cavity (one end connected to the storage cavity, the other end connected to the door panel), the descent speed of the door panel is slowed down. This prevents the door panel from rapidly tipping over due to its own weight during opening, thus avoiding impact on the user or the vehicle and reducing the risk of items slipping out of the storage cavity. Furthermore, through the cooperation of the first and second hinge plates, the rotation angle of the first plate is limited to 0°–90°. When the first plate is at 0°, the door panel opens horizontally to open the storage cavity; when it is at 90°, the door panel closes vertically. This allows the door panel to stably maintain a horizontal "small tabletop" state when open and reliably return to the vertically closed position when closed. This improves both safety and functionality of the storage backpack, solving the technical problems of unrestricted door panel rotation angle, inability to stably maintain the small tabletop state, poor slow-descent effect, and insufficient practicality in existing technologies.

[0006] The objective of this utility model can also be achieved by the following technical measures: Furthermore, the first page includes a U-shaped portion and a vertical portion, the vertical portion being disposed on one side of the U-shaped portion and integrally formed with the U-shaped portion, and the vertical portion being connected to the door panel; the second page is an L-shaped page, a receiving cavity is formed between the horizontal piece and the vertical piece of the L-shaped page, the vertical piece is connected to the backpack body and located in the storage cavity, and the front end of the horizontal piece is hinged to the other side of the U-shaped portion; when the first page rotates 0°, the vertical portion is in a horizontal state, and when the first page rotates 90°, the U-shaped portion enters the receiving cavity, and the vertical portion is in a vertical state.

[0007] By designing the first flap as an integral part of a U-shaped section and a vertical section, with the vertical section connected to the door panel, and the second flap as an L-shaped section forming a receiving cavity between its horizontal and vertical sections, the vertical section is fixedly connected to the backpack body and located within the storage cavity. The front end of the horizontal section is hinged to the other side of the U-shaped section. This design allows the vertical section to be horizontal and the door panel to open horizontally when the first flap rotates 0°; when the first flap rotates 90°, the U-shaped section enters the receiving cavity and the vertical section is vertical, closing the door panel vertically. This structure partially conceals the hinge within the receiving cavity when closed, resulting in a compact and aesthetically pleasing overall layout. Furthermore, the cooperation between the U-shaped section and the receiving cavity reliably limits and guides the horizontal and vertical positions of the door panel, avoiding the problems of exposed hinge structures, large interference spaces, and unstable door panel posture at extreme positions. This solves the technical problems of existing hinge structures that are simple and crude, affecting appearance and making it difficult to accurately define the horizontal and vertical working positions of the door panel.

[0008] Furthermore, an L-shaped notch is provided at the bottom of the storage cavity, and the second leaf is placed inside the L-shaped notch. The vertical section of the L-shaped leaf is locked to the vertical inner wall of the L-shaped notch by bolts.

[0009] By creating an L-shaped notch at the bottom of the storage cavity and placing the second flap within it, the vertical section of the L-shaped flap is bolted to the vertical inner wall of the notch. This design achieves several advantages: firstly, the bottom plate of the storage cavity serves as an installation reference, ensuring precise positioning and reliable fixation of the second flap, thus enhancing hinge connection strength and overall load-bearing capacity; secondly, the second flap, embedded within the L-shaped notch, does not protrude outwards, avoiding extra space occupation or impacting the vehicle's rear appearance and passability. This results in a more compact, robust, and easily assembled and maintained hinge installation structure, solving the technical problems of insufficient connection strength, easy displacement, large space occupation, and impact on layout and aesthetics caused by direct exposed hinge installation in existing technologies.

[0010] Furthermore, it also includes a partition net that is hooked inside the storage cavity, dividing the storage cavity into multiple storage spaces.

[0011] By hooking and installing dividers inside the storage compartment, the original single storage compartment is divided into multiple relatively independent storage spaces. Users can categorize and store items according to their size and type, preventing items from rolling, colliding, and piling up haphazardly within the storage compartment while the vehicle is in motion or the door is open. This not only reduces the risk of item damage and falling but also facilitates the storage and quick retrieval of small items. Furthermore, the dividers are hookable, allowing for flexible installation and removal, and can be adjusted or removed as needed, thereby improving the utilization rate and tidiness of the storage space. This solves the technical problems of existing storage backpacks, which have a single large cavity, making it easy for items to slide within and difficult to store in an orderly manner, resulting in low space utilization efficiency.

[0012] The beneficial effects of this utility model are as follows: This invention features a storage cavity within the backpack body, with the door panel hinged to the body at a hinge point. A slow-descent device, connected at one end to the storage cavity and the other to the door panel, is incorporated within the storage cavity to slow its descent. This prevents the door panel from rapidly tipping over during opening, thus avoiding impact on the user or the backpack and reducing the risk of items slipping out. Furthermore, the hinge structure utilizes the cooperation of the first and second hinge plates to limit the rotation angle of the first plate to 0°–90°. When the first plate is at 0°, the door panel opens horizontally to open the storage cavity; when it is at 90°, the door panel closes vertically. This ensures the door panel remains stably horizontal (like a small tabletop) when open and reliably returns to a vertically closed position when closed, improving both safety and functionality. Attached Figure Description

[0013] Figure 1 This is a diagram showing the storage backpack installed at the rear of a car (the door panel is rotated 90°, and the door panel is in a vertical position with the storage compartment closed).

[0014] Figure 2 This is a schematic diagram of a storage backpack (the door panel is rotated 90°, and the door panel is in a vertical position with the storage cavity closed).

[0015] Figure 3 This is the emergency use configuration for the storage backpack (the decorative cover and the backpack body are separated).

[0016] Figure 4 This is a schematic diagram of a storage backpack (the door panel is rotated 90°, and the door panel is in a vertical position and closes the storage cavity; the door panel is not shown in this attached diagram).

[0017] Figure 5 This is a diagram showing the storage backpack installed at the rear of a car (the door panel is rotated 0°, the door panel is in a horizontal position, and the storage compartment is open).

[0018] Figure 6 This is a schematic diagram of a storage backpack (the door panel is rotated 0°, the door panel is in a horizontal position, and the storage compartment is open).

[0019] Figure 7 This is another angle diagram of the storage backpack (door panel rotated 0°, door panel in horizontal position and storage compartment open).

[0020] Figure 8 This is another angle diagram of the storage backpack (the door panel is rotated 0°, the door panel is in a horizontal position and the storage cavity is open, the door panel is used as a small table).

[0021] Figure 9 This is a schematic diagram of a storage backpack (the door panel is rotated 0°, the door panel is in a horizontal position and the storage compartment is open).

[0022] Figure 10 This is a schematic diagram of the hinge (with the first page rotated 90°).

[0023] Figure 11 This is a schematic diagram of the hinge (first page rotated 0°).

[0024] Figure 12 This is a cross-sectional view of a storage backpack.

[0025] Figure 13 This is a cross-sectional view of a gas strut. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments: Implementation examples, in conjunction with Figures 1 to 13 As shown, a storage backpack for the rear of a car includes a backpack body 1, a door panel 2, and a slow-descent device. The backpack body 1 has a storage cavity 11 inside. The door panel 2 is hinged to the backpack body 1 and rotates relative to the backpack body 1 about the hinge point as the rotation center to open or close the storage cavity 11. The slow-descent device is disposed in the storage cavity 11. One end of the slow-descent device is connected to the storage cavity 11, and the other end of the slow-descent device is connected to the door panel 2. The slow-descent device is used to slow down the descent speed of the door panel 2.

[0027] Furthermore, it also includes a lock, which comprises a lock case, a lock hook 3, a mechanical unlocking module, and an electronic unlocking module. The lock is mounted on the backpack body 1. The lock case has a lock opening 31. The mechanical unlocking module, the electronic unlocking module, and the lock hook 3 are all located inside the lock case. The mechanical unlocking module and the electronic unlocking module are respectively connected to the lock hook 3. When the mechanical unlocking module or the electronic unlocking module is working, it can drive the lock hook 3 to move. The door panel 2 is provided with a latch 21. When the door panel 2 closes the storage cavity 11, the latch 21 passes through the lock opening 31 and inserts into the lock case. When the mechanical unlocking module or the electronic unlocking module is working, it drives the lock hook 3 to move, so that the lock hook 3 hooks tightly with the latch 21 to achieve locking, or so that the lock hook 3 separates from the latch 21 to achieve unlocking.

[0028] Furthermore, a switch 12 is provided on the side wall of the backpack body 1, and the switch 12 is connected to the electronic unlocking module via a signal line. A pull rope 4 is provided inside the backpack body 1, and the pull rope 4 is connected to the mechanical unlocking module.

[0029] Furthermore, the electronic unlocking module is provided with a first signal connection terminal and a second signal connection terminal. The first signal connection terminal is used to connect to the vehicle computer (i.e., the vehicle control unit), and the second signal connection terminal is connected to the switch 12 via a signal line.

[0030] Furthermore, the slow-descent device includes a gas strut 5, an upper ball joint support 51, and a lower ball joint support 52. The upper ball joint support 51 is disposed in the storage cavity 11, and the lower ball joint support 52 is disposed on the door panel 2. The upper end of the gas strut 5 is connected to the upper ball joint support 51, and the lower end of the gas strut 5 is connected to the lower ball joint support 52.

[0031] Furthermore, it also includes a hinge 6, which comprises a first leaf 61 and a second leaf 62. The first leaf 61 and the second leaf 62 are hinged together. The first leaf 61 is connected to the door panel 2, and the second leaf 62 is connected to the backpack body 1. The first leaf 61 rotates around the hinge point as the rotation center. The rotation angle of the first leaf 61 is 0° to 90°. When the first leaf 61 rotates 0°, the door panel 2 is in a horizontal state and the storage cavity 11 is open. When the first leaf 61 rotates 90°, the door panel 2 is in a vertical state and the storage cavity 11 is closed.

[0032] Further, the first page 61 includes a U-shaped portion 611 and a vertical portion 612. The vertical portion 612 is disposed on one side of the U-shaped portion 611 and is integrally formed with the U-shaped portion 611. The vertical portion 612 is connected to the door panel 2. The second page 62 is an L-shaped page. A receiving cavity 623 is formed between the horizontal piece 621 and the vertical piece 622 of the L-shaped page. The vertical piece 622 is connected to the backpack body 1 and located in the storage cavity 11. The front end of the horizontal piece 621 is hinged to the other side of the U-shaped portion 611. When the first page 61 rotates 0°, the vertical portion 612 is in a horizontal state. When the first page 61 rotates 90°, the U-shaped portion 611 enters the receiving cavity 623, and the vertical portion 612 is in a vertical state.

[0033] Furthermore, the bottom of the storage cavity 11 has an L-shaped notch 111, the second leaf 62 is placed inside the L-shaped notch 111, and the vertical piece 622 of the L-shaped leaf is locked to the vertical inner wall of the L-shaped notch 111 by bolts.

[0034] Furthermore, the backpack body 1 is provided with a first sealing strip 7 and a second sealing strip 8 around the storage cavity 11. The first sealing strip 7 and the second sealing strip 8 are arranged vertically, one above the other. An upper abutment 22 is formed at the top of the back of the door panel 2, and a lower abutment 23 is provided near the top of the back of the door panel 2. When the door panel 2 closes the storage cavity 11, the upper abutment 22 abuts against the first sealing strip 7, and the lower abutment 23 abuts against the second sealing strip 8.

[0035] Furthermore, both the first sealing strip 7 and the second sealing strip 8 are annular strips.

[0036] Furthermore, the backpack body 1 is provided with a first connecting rib 13 and a second connecting rib 14 around the storage cavity 11, and the first connecting rib 13 and the second connecting rib 14 are arranged one above the other in the vertical direction. The first connecting rib 13 is a T-shaped connecting rib, and the first sealing strip 7 is a hollow first sealing strip 7. The bottom of the first sealing strip 7 has a first slot 71 with a width smaller than the width of the transverse rib of the T-shaped connecting rib. The T-shaped connecting rib passes through the first slot 71 and is inserted into the first sealing strip 7. The transverse rib of the T-shaped connecting rib is tightly attached to the inner wall of the first sealing strip 7, and the vertical rib of the T-shaped connecting rib extends outward through the first slot 71. The second sealing strip 8 includes a hollow front strip 81 and a hollow rear strip 82, which are connected. The bottom of the hollow rear strip 82 has a second snap 821, and silicone sheets 822 are spaced apart on the inner wall of the hollow rear strip 82. The second connecting rib 14 passes through the second snap 821 and is inserted into the inner cavity of the hollow rear strip 82, and the silicone sheets 822 are tightly attached to the second connecting rib 14.

[0037] Furthermore, when the door panel 2 closes the storage cavity 11, the upper abutment part 22 abuts against the hollow first sealing strip 7, and the lower abutment part 23 abuts against the hollow front sealing strip 81.

[0038] Furthermore, the backpack body 1 is provided with a license plate mounting area 15 below the storage cavity 11, and a license plate light 16 and a tailgate switch 17 connected to the vehicle computer are provided above the license plate mounting area 15. The light of the license plate light 16 is directed toward the license plate mounting area 15, and a rear surround view camera 18 connected to the vehicle computer is provided at the bottom of the backpack body 1 in the license plate mounting area 15.

[0039] Furthermore, it also includes a decorative cover 9, which has a license plate mounting area 15. The license plate mounting area 15 has bolt holes 151 spaced apart. The decorative cover 9 has a light-transmitting opening 91 at the top of the license plate mounting area 15 corresponding to the license plate light 16, and an operating opening 92 at the position corresponding to the tailgate switch 17. The decorative cover 9 has an opening 93 at the bottom of the license plate mounting area 15 corresponding to the rear surround view camera 18. The decorative cover 9 is detachably mounted on the backpack body 1 and located below the storage cavity 11. The license plate light 16 corresponds to the light-transmitting opening 91, the tailgate switch 17 corresponds to the operating opening 92, and the rear surround view camera 18 extends out of the opening 93. The pull rope 4 is located inside the backpack body 1 and below the storage cavity 11. The decorative cover 9 covers the pull rope 4, and the end of the pull rope 4 is provided with a pull ring 41.

[0040] It also includes a partition net 10, which is hooked inside the storage cavity 11 and divides the storage cavity 11 into multiple storage spaces.

[0041] By incorporating a storage backpack with a slow-closing function at the rear of the vehicle, and employing a structure that combines door panel 2 with a slow-closing device, the door panel 2 can be smoothly opened and precisely limited within the 0° to 90° range via the limiting hinge 6. This allows the door panel 2 to reliably and vertically close the storage cavity 11 while maintaining a stable horizontal small table position. The combination of a mechanical and electronic unlocking module in the lock structure, the side wall switch 12 and pull rope 4 emergency mechanical unlocking mechanism, and the dual signal interface design of the electronic unlocking module ensure compatibility between electronic unlocking and emergency mechanical unlocking, facilitating integration with the vehicle's computer control. Multiple annular sealing strips ensure reliable compression of the upper and lower sealing strips when the door panel 2 is closed, significantly improving the waterproof, dustproof, and noise reduction performance of the storage cavity 11. Simultaneously, a license plate mounting area 15, license plate light 16, tailgate switch 17, and rear surround view camera 18 are integrated below the storage cavity 11, with the pull rope 4 concealed by a removable decorative cover 9, further enhanced by an internally detachable partition. Network 10 rationally partitions the storage space, thereby comprehensively solving the following technical problems existing in the current technology of car rear storage backpacks: the door panel 2 lacks an effective slow-down mechanism during opening, the folding speed is uncontrollable and it cannot stably maintain the horizontal table posture; the locks mostly rely on electronic unlocking, which cannot be reliably opened when the vehicle is powered off or the electronic control system is abnormal, and the emergency mechanical unlocking capability is insufficient, resulting in poor locking security; the sealing structure is simple and the rubber strip installation method is simple, which is prone to water seepage, dust ingress and wind noise under conditions such as rain, snow and high-speed driving; after the storage backpack is installed, it is difficult to integrate and modularly arrange components such as license plate, license plate light 16, car tailgate switch 17 and rear surround view camera 18 with the original vehicle, the wiring harness of the storage backpack is easy to be exposed, affecting the overall appearance of the rear; and the storage cavity 11 is mostly a single large cavity, which makes it easy for items to roll, collide and pile up messily in the cavity, making it inconvenient to classify and store and resulting in low space utilization.

[0042] In other embodiments, the gas strut 5 is a variable damping gas strut with a buffer section. The gas strut 5 includes a cylinder 53, a piston 54, and a rod 55. The piston 54 is slidably placed inside the cylinder 53. The cylinder 53 is connected to the upper ball joint support 51. One end of the rod 55 is connected to the piston 54, and the other end of the rod 55 extends out of the cylinder 53 and is connected to the lower ball joint support 52. The inner cavity of the cylinder 53 is divided into a front throttling exhaust section 56, a middle throttling exhaust section 57 and a rear throttling exhaust section 58 in sequence along the movement direction of the piston 54, and the front throttling exhaust section 56, the middle throttling exhaust section 57 and the rear throttling exhaust section 58 are interconnected. The inner wall of the front throttling exhaust section 56 is provided with a first throttling air inlet / outlet hole 20 for connecting the inner cavity of the cylinder 53 with the outside air. The inner wall of the middle throttling exhaust section 57 is provided with a second throttling air inlet / outlet hole 30 for connecting the inner cavity of the cylinder 53 with the outside air. The inner wall of the rear throttling exhaust section 58 is provided with a third throttling air inlet / outlet hole 40 for connecting the inner cavity of the cylinder 53 with the outside air. The diameters of the first throttling air inlet / outlet hole 20, the second throttling air inlet / outlet hole 30, and the third throttling air inlet / outlet hole 40 gradually decrease from the inner cavity of the cylinder 53 toward the outside.

[0043] The first throttling inlet and outlet port 20 includes a first cylindrical hole 201 radially opened along the cylinder body 53 and a first conical throttling hole 202 communicating with the outer end of the first cylindrical hole 201. The inner end diameter of the first conical throttling hole 202 is larger than its outer end diameter. The inner wall of the first cylindrical hole 201 is provided with a plurality of first ribs 203 extending along the hole axis in the circumferential direction. The radial height of each first rib 203 gradually decreases from one end near the inner cavity of the cylinder body 53 to one end near the first conical throttling hole 202. The second throttling inlet / outlet port 30 includes a second cylindrical hole 301 radially opened along the cylinder body 53 and a second conical throttling hole 302 communicating with the outer end of the second cylindrical hole 301. The axial length of the second conical throttling hole 302 is greater than the axial length of the first conical throttling hole 202, and the minimum diameter of the outer end of the second conical throttling hole 302 is smaller than the minimum diameter of the outer end of the first conical throttling hole 202. At least one annular recess 303 is formed at intervals along the circumferential direction on the inner wall of the second cylindrical hole 301. The recess depth of the annular recess 303 is less than 1 / 3 of the radius of the second cylindrical hole 301. The third throttling inlet / outlet port 40 includes a third cylindrical hole 401 radially opened along the cylinder body 53 and a third conical throttling hole 402 communicating with the outer end of the third cylindrical hole 401. The axial length of the third conical throttling hole 402 is greater than the axial length of the second conical throttling hole 302, and the minimum diameter of the outer end of the third conical throttling hole 402 is smaller than the minimum diameter of the outer end of the second conical throttling hole 302. A guide block 403 is provided in the inner cavity of the third cylindrical hole 401. The guide block 403 protrudes from the hole wall of the third cylindrical hole 401 toward the center. Its front end face facing the inner cavity of the cylinder body 53 is an arc transition surface and occupies 10% to 40% of the effective flow area of ​​the cross-section of the third cylindrical hole 401.

[0044] The principle and benefits of slow descent: A variable damping gas strut 5 with a buffer section is installed in the storage cavity 11. One end is connected to the upper ball joint support 51 in the storage cavity 11, and the other end is connected to the lower ball joint support 52 on the door panel 2. The inner cavity of the cylinder 53 of the gas strut 5 is divided into a front throttling exhaust section 56, a middle throttling exhaust section 57, and a rear throttling exhaust section 58 along the direction of piston 54 movement. A first throttling inlet / exhaust hole 20, a second throttling inlet / exhaust hole 30, and a third throttling inlet / exhaust hole 40 are respectively provided on the inner wall of each section. The diameter of each throttling inlet / exhaust hole gradually decreases from the inner cavity of the cylinder 53 towards the outside, so that when the piston 54 is in different stroke positions, the inner cavity of the cylinder 53 is connected to the outside through three, two, or one throttling hole, thereby allowing for... During the movement of door panel 2 from vertically closed to horizontally open or from horizontally closed to vertically closed, the front section forms a small damping (multiple throttle holes for intake and exhaust), the middle section forms a medium damping (partial throttle holes for intake and exhaust), and the final section forms a large damping (only a single throttle hole for intake and exhaust). This achieves segmented and controllable slow descent of door panel 2 throughout its entire stroke. In particular, it significantly reduces the movement speed of door panel 2 when it approaches the end position, avoiding the risk of door panel 2 impacting the backpack body 1 or causing "hand injury". It also reduces the risk of items in storage cavity 11 slipping or falling due to the violent descent of door panel 2. This significantly improves the safety, smoothness, and comfort of the rear storage device during opening and closing, and meets the requirements of the vehicle's rear auxiliary components for safe opening and closing performance.

Claims

1. A storage backpack with limited rotation angle of the rear door panel of a car, comprising a backpack body, a door panel, a soft-close device, and a hinge, characterized in that: The backpack body has a storage cavity. The door panel is hinged to the backpack body and rotates relative to the backpack body with the hinge point as the rotation center to open or close the storage cavity. The slow-descent device is disposed in the storage cavity. One end of the slow-descent device is connected to the storage cavity and the other end of the slow-descent device is connected to the door panel. The slow-descent device is used to slow down the descent speed of the door panel. The hinge includes a first leaf and a second leaf, which are hinged together. The first leaf is connected to the door panel, and the second leaf is connected to the backpack body. The first leaf rotates around the hinge point as the rotation center, and the rotation angle of the first leaf is 0° to 90°. When the first leaf rotates 0°, the door panel is in a horizontal state and the storage cavity is open. When the first leaf rotates 90°, the door panel is in a vertical state and the storage cavity is closed.

2. The storage backpack with limited rotation angle of the rear door panel of a car according to claim 1, characterized in that: The first page includes a U-shaped portion and a vertical portion. The vertical portion is disposed on one side of the U-shaped portion and is integrally formed with the U-shaped portion. The vertical portion is connected to the door panel. The second page is an L-shaped page. A receiving cavity is formed between the horizontal piece and the vertical piece of the L-shaped page. The vertical piece is connected to the backpack body and located in the storage cavity. The front end of the horizontal piece is hinged to the other side of the U-shaped portion. When the first page rotates 0°, the vertical portion is in a horizontal state. When the first page rotates 90°, the U-shaped portion enters the receiving cavity, and the vertical portion is in a vertical state.

3. The storage backpack with limited rotation angle of the rear door panel of a car according to claim 2, characterized in that: The storage cavity has an L-shaped notch at the bottom, and the second leaf is placed inside the L-shaped notch. The vertical part of the L-shaped leaf is locked to the vertical inner wall of the L-shaped notch by bolts.

4. The storage backpack with limited rotation angle of the rear door panel of a car according to claim 1, characterized in that: It also includes a partition net that is hooked inside the storage cavity, dividing the storage cavity into multiple storage spaces.

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