Trolley backpack

Abstract

The utility model discloses a trolley backpack, and belongs to the technical field of backpack structure improvement. The trolley knapsack comprises a knapsack body and a shell set, a deformable expansion face set is arranged on the outer surface of the knapsack body, a first zipper is arranged on the outer edge of the expansion face set, the expansion face set is distributed in a complete annular face mode along the periphery of the knapsack body, the tail end of the first zipper extends out of a section relative to the starting end, and the starting end of the first zipper is arranged in the middle of the expansion face set; the capacity expansion surface group of the trolley knapsack is completely expanded along the periphery of the knapsack body, a continuous annular capacity expansion structure is provided, and the utilization rate of the capacity expansion space is remarkably improved; and expansion or storage can be completed only by operating a single zipper, so that the use process is simplified. And through a rotary connecting structure of the buckle and the wheel shell, the straps can naturally swing along with the movement of a human body in the use process, so that the traction force transmitted by the straps and the shaking of the backpack are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of backpack structure improvement, and in particular to a trolley backpack. Background Art

[0002] Current luggage expansion technology, such as Chinese Utility Model Publication No. CN221284865U, discloses a dual-expandable luggage design that combines a zipper with an expansion panel. When deployed, the expansion panels in this technology form a fan-shaped structure, with each panel capable of expanding only the upper or lower half of the luggage. To achieve a complete annular expansion surface, this technology employs two expansion panels, one above and one below, to expand the luggage's upper and lower halves, respectively.

[0003] However, this approach has the following limitations:

[0004] 1. The independent setting of the upper and lower expansion surfaces leads to a complex structure and cumbersome manufacturing process;

[0005] 2. The expansion function is limited to certain areas and cannot be expanded all around, resulting in low utilization of the expansion space. Summary of the Invention

[0006] The present application provides a trolley backpack. The trolley backpack according to the present application can overcome at least one or more problems existing in the prior art.

[0007] A trolley backpack includes a bag body and a shell assembly, wherein the trolley is arranged at the top of the bag body and the shell assembly is arranged at the bottom of the bag body; a storage cavity for storing items is formed inside the bag body, and a deformable expansion surface assembly is provided on the outer surface of the bag body, wherein:

[0008] The outer edge of the expansion face group is provided with a first zipper:

[0009] When the first zipper is opened, the expansion panel can be unfolded;

[0010] When the first zipper is in a closed state, the expansion surface group is folded, and the folded expansion surface group is located below the first zipper.

[0011] In one possible implementation, the expansion surface group is distributed along the outer periphery of the package body in a complete annular surface, the end of the first zipper extends beyond the starting end by a certain distance, and the starting end of the first zipper is arranged in the middle of the expansion surface group;

[0012] When the first zipper is fully closed, the initial section of the first zipper is located below the final section;

[0013] When the first zipper is fully opened, the two chains of the initial section of the first zipper are distributed in a V shape, and the lock head of the first zipper connects the starting ends of the two chains of the first zipper.

[0014] In one possible implementation, a second zipper is provided on the expansion panel. When the second zipper is in an open state, the accommodating cavity of the bag body is in communication with the outside.

[0015] In one possible implementation, the two sides of the expansion surface group are respectively connected to the main surface group and the movable surface group, and the main surface group, the movable surface group and the expansion surface group together form a complete closed package; the surfaces of the main surface group and the movable surface group are connected by at least one stabilizing belt.

[0016] In one possible implementation, the shell group includes a wheel shell, and the two wheel shells are symmetrically arranged on both sides of the bag body. The bottom of the wheel shell is rotatably connected to the roller, and the top of the wheel shell is connected to the tail end of the bag body strap through a buckle.

[0017] In one possible implementation, the buckle is rotationally connected to the wheel housing; a slot is provided on the wheel housing, and a rotating hole is provided at the slot. After the buckle is inserted into the slot, the rotating plate on the buckle fits into the rotating hole, and the buckle can swing in the slot.

[0018] In one possible implementation, one end of the rotating plate is connected to the snap body, the connection is elastic, and a snap plate is provided on the side of the rotating plate away from the connection, and the plane where the rotating plate is located is set at an angle to the plane where the snap body is located; the snap plate rests on the outer edge of the bottom of the rotating hole.

[0019] In a possible implementation, the shell group further includes a foot shell, which covers the bottom of the package body, and a pad is provided at the bottom of the foot shell.

[0020] Compared with the existing technology, the present invention has the following beneficial effects: by optimizing the combined design of the zipper and the expansion surface, the expansion surface group is fully deployed along the outer periphery of the bag, providing a continuous annular expansion structure, significantly improving the utilization rate of the expansion space; only a single zipper needs to be operated to complete expansion or storage, simplifying the use process;

[0021] The shell design provides stable support when placed upright through the cooperation of the wheel shell and the foot shell, which enhances the stability and durability of the backpack.

[0022] The rotating connection structure between the buckle and the wheel shell allows the shoulder strap to swing naturally with the movement of the human body during use, thereby reducing the traction and shaking of the backpack transmitted by the shoulder strap.

[0023] It should be noted that the above-mentioned various possible implementation methods can be combined under the premise that the solutions are not contradictory. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural schematic diagram of a trolley backpack provided in an embodiment of the present application.

[0025] Figure 2 yes Figure 1 Schematic diagram of the trolley backpack in expanded state.

[0026] Figure 3 yes Figure 1 Schematic diagram of the trolley backpack from another angle.

[0027] Figure 4 yes Figure 1 Schematic diagram of the structure of the foot shell in a trolley backpack.

[0028] Figure 5 yes Figure 1 Schematic diagram of the structure of the wheel housing in a trolley backpack.

[0029] Figure 6 yes Figure 5 Schematic diagram of the structure of the buckle in the wheel housing.

[0030] Figure 7 yes Figure 5 Schematic diagram of the structure of the buckle in the wheel housing from another angle.

[0031] Description of reference numerals:

[0032] 10. Package body; 11. Main body surface group; 12. Expansion surface group; 13. Movable surface group; 14. First zipper; 15. Second zipper; 16. Stabilizing belt; 20. Pull rod; 30a. Wheel shell; 31. Roller; 32. Slot; 33. Rotating hole; 34. Fixing part; 30b. Buckle; 35. Rotating plate; 351. Clamping plate; 40. Standing foot shell; 41. Pad. DETAILED DESCRIPTION

[0033] The present application will be described below with reference to the accompanying drawings, which illustrate several embodiments of the present application. However, it should be understood that the present application can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present application more complete and fully illustrate the scope of protection of the present application to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide many additional embodiments.

[0034] This application embodiment provides a trolley backpack, please refer to Figures 1 to 3 The trolley backpack includes a body 10, a trolley 20, and a shell assembly. The body 10 is provided with a shoulder strap, the trolley 20 is retractably mounted on the top of the body 10, and the shell assembly is provided at the bottom of the body 10 for reinforcement. The body 10 defines a storage cavity for storing items, and the outer surface of the body 10 is provided with a deformable expansion surface assembly 12.

[0035] Specifically, the outer edge of the expansion surface group 12 is provided with a first zipper 14, that is, the two chains of the first zipper 14 are respectively provided on both sides of the expansion surface group:

[0036] When the first zipper 14 is opened, the expansion panel 12 can be unfolded;

[0037] When the first zipper 14 is in the closed state, the expansion surface group 12 is folded, and the folded expansion surface group 12 is located below the first zipper 14. The expansion surface group 12 is usually made of cloth and can be folded together by pleating.

[0038] Chinese Utility Model Publication No. CN221284865U discloses a dual-expandable luggage system, involving a combination of a zipper and an expansion panel. This technology employs a fan-shaped expansion panel when deployed, with each panel capable of expanding only the upper or lower half of the luggage. Because a zipper's lock must connect at least two zipper chains at one point, this solution utilizes two expansion panels, one above and one below, to achieve a complete, circular expansion panel.

[0039] In the present application, the expansion surface group 12 is distributed in a complete annular surface along the outer circumference of the bag body 10. To solve the above problems in the prior art, the end of the first zipper 14 extends beyond the starting end, and the starting end of the first zipper 14 is set in the middle of the expansion surface group 12.

[0040] When the first zipper 14 is fully closed, Figure 1 As shown, the initial section of the first zipper 14 is located below the final section;

[0041] When the first zipper 14 is fully opened, Figure 2 As shown, the two chains of the initial section of the first zipper 14 are distributed in a V shape, so that the expansion panel 12 can be unfolded and the lock head can still connect to the starting ends of the two chains of the first zipper 14.

[0042] Furthermore, a second zipper 15 is provided in the middle of the expansion surface group 12. When the second zipper 15 is in an open state, the accommodating cavity of the bag body 10 is communicated with the outside.

[0043] Specifically, the expansion surface group 12 is connected to the main surface group 11 and the movable surface group 13 on both sides, and the main surface group 11, the movable surface group 13, and the expansion surface group 12 together form a complete closed package 10. When the expansion surface group 12 is in the expanded state, the movable surface group 13 is away from the main surface group 11; the surfaces of the main surface group 11 and the movable surface group 13 are connected by at least one stabilizing band 16, which can be an elastic band, a buckle band, or a fixed band to ensure structural stability and functional reliability.

[0044] The housing assembly includes a wheel housing 30a, which is symmetrically arranged on both sides of the bag body 10, specifically on both sides of the bottom of the main surface assembly 11. The bottom of the wheel housing 30a is rotatably connected to the roller 31, and the top of the wheel housing 30a is connected to the tail end of the shoulder strap of the bag body 10 through a buckle 30b.

[0045] The buckle 30b is rotatably connected to the wheel housing 30a. Figures 5 to 7 Specifically, a slot 32 is provided on the wheel housing 30a, and a rotating hole 33 is provided at the slot 32. After the buckle 30b is inserted into the slot 32, the rotating plate 35 on the buckle 30b is adapted to the rotating hole 33. The rotating hole 33 is circular, and the buckle 30b can swing in the slot 32.

[0046] In a possible implementation, one end of the rotating plate 35 is connected to the buckle 30b body, the connection is elastic, and a clamping plate 351 is provided on the side of the rotating plate 35 away from the connection end. The plane where the rotating plate 35 is located is set at an angle to the plane where the buckle 30b body is located.

[0047] During installation, when the buckle 30b is inserted into the slot 32, the connection of the rotating plate 35 undergoes elastic deformation, causing the plane of the rotating plate 35 to become parallel to the plane of the buckle 30b body, thereby facilitating the insertion of the buckle 30b into the slot 32. When the rotating plate 35 enters the rotation hole 33, the elastic force of the connection causes the rotating plate 35 to return to its original position, allowing the rotating plate 35 to be inserted into the rotation hole 33 and abut against the outer edge of the bottom of the rotation hole 33 via the clamping plate 351, thereby achieving stable installation and rotation of the buckle 30b.

[0048] See also Figure 7 Before the buckle 30b is inserted into the slot 32, the wheel housing 30a and the bag body 10 are fixed together with the fastener 34.

[0049] See also Figure 4 The housing assembly further includes a footing housing 40, which covers the bottom of the bag body 10 and is specifically disposed at the front edge of the bottom of the main body assembly 11 and can be connected to the wheel housing 30a. Furthermore, a pad 41 is provided at the bottom of the footing housing 40. When the bag body 10 is in an upright position, the bottom of the roller 31 of the wheel housing 30a and the bottom of the pad 41 are located at the same horizontal plane.

[0050] Instructions for use:

[0051] In the use of the present trolley backpack, when the volume of the bag body 10 needs to be expanded, the expansion panel 12 can be expanded by operating the first zipper 14. Specifically, when the first zipper 14 is in a fully opened state (e.g. Figure 2As shown, because the end of the first zipper 14 extends beyond the starting end, its initial and final sections are parallel when opened. The two chains of the initial section form a V-shape and are connected to the two chains of the first zipper 14 by the locking head. This ensures that the expansion panel assembly 12 can be fully expanded along the outer circumference of the bag body 10, achieving continuous annular expansion and maximizing the expansion space.

[0052] When the first zipper 14 is in a fully closed state (eg Figure 1 As shown), the last section of the first zipper 14 is located above the initial section, so that the expansion face group 12 is folded and stored under the first zipper 14, thereby restoring the compact state of the bag body 10.

[0053] Although exemplary embodiments of the present application have been described, it will be understood by those skilled in the art that various changes and modifications may be made to the exemplary embodiments of the present application without departing substantially from the spirit and scope of the present application. Therefore, all such changes and modifications are intended to be within the scope of protection of the present application as defined by the appended claims. The present application is defined by the appended claims, and equivalents of these claims are intended to be included therein.

Claims

1. A trolley backpack, comprising a bag body (10) and a shell group, wherein the shell group is arranged at the bottom of the bag body (10); a storage cavity for storing items is formed inside the bag body (10), and a deformable expansion surface group (12) is provided on the outer surface of the bag body (10), characterized in that: The outer edge of the expansion face assembly (12) is provided with a first zipper (14): When the first zipper (14) is opened, the expansion panel (12) can be unfolded; When the first zipper (14) is in a closed state, the expansion surface group (12) is folded, and the folded expansion surface group (12) is located below the first zipper (14).

2. The trolley backpack according to claim 1, characterized in that: The expansion surface group (12) is distributed along the outer periphery of the package body (10) in a complete annular surface, the end of the first zipper (14) extends beyond a certain distance relative to the starting end, and the starting end of the first zipper (14) is arranged in the middle of the expansion surface group (12); When the first zipper (14) is fully closed, the initial section of the first zipper (14) is located below the final section; When the first zipper (14) is fully opened, the two chains of the initial section of the first zipper (14) are distributed in a V-shape, and the lock head of the first zipper (14) connects the two chain starting ends of the first zipper (14).

3. The trolley backpack according to claim 2, characterized in that: A second zipper (15) is provided on the expansion surface group (12); when the second zipper (15) is in an open state, the accommodating cavity of the bag body (10) is in communication with the outside.

4. The trolley backpack according to claim 2, characterized in that: The two sides of the expansion surface group (12) are respectively connected to the main surface group (11) and the movable surface group (13), and the main surface group (11), the movable surface group (13) and the expansion surface group (12) together form a complete closed package (10); the surfaces of the main surface group (11) and the movable surface group (13) are connected by at least one stabilizing belt (16).

5. The trolley backpack according to claim 1, characterized in that: The shell group includes a wheel shell (30a), and the two wheel shells (30a) are symmetrically arranged on both sides of the bag body (10). The bottom of the wheel shell (30a) is rotatably connected to the roller (31), and the top of the wheel shell (30a) is connected to the tail end of the shoulder strap of the bag body (10) through a buckle (30b).

6. The trolley backpack according to claim 5, characterized in that: The buckle (30b) is rotatably connected to the wheel housing (30a); a slot (32) is provided on the wheel housing (30a), and a rotation hole (33) is provided at the slot (32); after the buckle (30b) is inserted into the slot (32), the rotation plate (35) on the buckle (30b) is matched with the rotation hole (33), and the buckle (30b) can swing in the slot (32).

7. The trolley backpack according to claim 6, characterized in that: One end of the rotating plate (35) is connected to the buckle (30b) body, and the connection is elastic. A clamping plate (351) is provided on the side of the rotating plate (35) away from the connection. The plane where the rotating plate (35) is located is arranged at an angle to the plane where the buckle (30b) body is located. The clamping plate (351) abuts against the outer edge of the bottom of the rotating hole (33).

8. The trolley backpack according to claim 1, characterized in that: The shell group further includes a footing shell (40), the footing shell (40) covering the bottom of the package body (10), and a cushion block (41) is provided at the bottom of the footing shell (40).

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