A conveniently foldable lightweight backpack

Abstract

The utility model relates to the field of backpack, specifically disclose a kind of lightweight backpack of easy folding. Including pack body assembly, the pack body assembly is by front pack body, rear pack body and organ type folding bag composition;Still including expansion mechanism, the expansion mechanism includes the unlocking lever of being arranged in both sides, elastic latch is equipped on the unlocking lever, eccentric block is equipped with beside the elastic latch;Belt adjusting mechanism, the belt adjusting mechanism includes the T slot of being opened in slider support rod, T block is slidably connected in the T slot, and multifunctional belt is connected on the T block. The backpack uses, using the expansion mechanism, after unlocking both sides can be realized volume regulation and locking;The belt adjusting mechanism can be flexibly adapted to carry or suitcase fixed scene, compared with existing backpack, without complex operation, overall operation is convenient, and adaptability is strong.

Description

Technical Field

[0001] This utility model relates to the field of backpacks, and more particularly to a lightweight backpack that is easy to fold. Background Technology

[0002] Backpacks are portable containers used to carry items. They have an internal cavity and an external cover to protect the contents. Because they are frequently carried or used in conjunction with suitcases for travel, commuting, and other similar scenarios, foldable backpacks are favored by many users due to their compact size.

[0003] Currently, backpacks with folding functions cannot be expanded to different capacities during use. When users need to carry a small number of items, the backpack is prone to shaking and scattering due to excess space. When carrying more items, it is difficult to stably expand to the required volume. On the other hand, users often place the backpack on top of their suitcases and drag it when traveling. However, existing backpacks lack a dedicated fixing structure, which can easily lead to insecure fixing, shaking, and falling off, causing inconvenience to travel. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a lightweight, foldable backpack. During use, the backpack utilizes an expansion mechanism to solve the problems of fixed or cumbersome volume adjustments in traditional backpacks. Operation is simple, allowing for multi-level expansion and locking, thus balancing portability and practicality. Furthermore, this invention optimizes the strap adjustment mechanism, resolving the issues of inflexible strap positioning and poor adaptability in existing backpacks. The strap position can be flexibly adjusted, improving adaptability and carrying stability, and optimizing the user experience.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A lightweight, easily foldable backpack includes a front body, a rear body, and a folding pouch, which together constitute a bag assembly. The bag assembly contains a cavity for accommodating items. An expansion mechanism, in conjunction with the bag assembly, allows for multi-level adjustment of the bag's volume. The expansion mechanism includes two symmetrically fixed sliding support rods connected to the side wall of the front body, and two symmetrically fixed folding adjustment rods connected to the side wall of the rear body. Each of the two folding adjustment rods has three longitudinally extending guide slots (upper, middle, and lower). Each of the two sliding support rods is fixed with... The backpack is equipped with three locking rods, each of which passes through a corresponding through-guide groove and is slidably connected. Each locking rod has three equally spaced expansion slots. Each folding adjustment rod has an unlocking rod on the side furthest from the bag body assembly. Each unlocking rod has three elastic pins fixedly connected to its corresponding folding adjustment rod on the side closest to the folding adjustment rod. Each unlocking rod is elastically connected to its corresponding folding adjustment rod via multiple pin return springs. Each elastic pin extends into the corresponding through-guide groove. A strap adjustment mechanism is also included to improve the backpack's stability.

[0007] Preferably, the upper end of the package assembly is provided with an opening, and the opening is provided with a zipper for opening and closing.

[0008] Preferably, a handle is fixedly connected to the top of the bag body assembly, and double shoulder straps are symmetrically connected to the front side of the front bag body.

[0009] Preferably, a shock-absorbing pad is fixedly connected to the front side of the front body, and a lumbar support pad is fixedly installed on the front side of the front body.

[0010] Preferably, a rotating rod is rotatably connected to the outer side of each of the two folding adjusting rods, and an eccentric block is fixedly connected to the other end of each of the two rotating rods.

[0011] Preferably, the strap adjustment mechanism includes two T-slots respectively opened on the front side of the corresponding slider support rod, each T-slot is slidably connected to a T-block, and each T-block is fixedly connected to the front side of a multi-functional strap, one of the multi-functional straps is fixedly connected to a female buckle at the other end, and the other of the multi-functional strap is fixedly connected to a female buckle at the other end.

[0012] Compared with the prior art, the advantages of this utility model are as follows:

[0013] 1. The expansion operation is convenient and efficient. Compared with the existing backpacks with fixed or complicated volume adjustments, you only need to turn the rotating rod to unlock and push the bag to achieve multi-level expansion. Then, the elastic latch will automatically lock it, simplifying the traditional complicated adjustment process into a one-step operation.

[0014] 2. Multiple adjustable levels flexibly adapt to storage needs. You can select the corresponding volume according to the number of items to avoid wasting space or insufficient storage. After locking the appropriate level, the internal space fits snugly with the items, reducing the shaking and scattering of items and protecting the integrity of the items.

[0015] 3. The straps are suitable for multiple scenarios. Through the sliding cooperation of the T-slot and the T-block, the position of the straps can be flexibly adjusted. They can be fixed to the waist to improve stability when carried, and can also be moved up to bind to the luggage handle to prevent slippage during transportation, thus solving the problem of the single function of traditional backpack straps. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a lightweight backpack that is easy to fold according to the present invention;

[0017] Figure 2 for Figure 1 Enlarged view of point A;

[0018] Figure 3 for Figure 1 A schematic diagram of the rear planar structure;

[0019] Figure 4 for Figure 3 Enlarged view of point B;

[0020] Figure 5 A schematic diagram showing the coordination between the expansion mechanism and the strap adjustment structure;

[0021] Figure 6 for Figure 1 A schematic diagram of the front planar structure.

[0022] In the diagram: 1. Front bag body; 2. Rear bag body; 3. Folding bag; 4. Handle; 5. Shoulder straps; 6. Sliding support rod; 7. Locking rod; 8. Expansion slot; 9. Elastic latch; 10. Latch return spring; 11. Rotating rod; 12. T-slot; 13. T-block; 14. Multifunctional strap; 15. Female buckle; 16. Female buckle; 17. Waist support pad; 18. Shock-absorbing pad; 19. Unlocking rod; 20. Folding adjustment rod; 21. Through guide groove; 22. Eccentric block; 23. Zipper. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] Reference Figures 1-6A lightweight backpack that is easy to fold includes a front pack 1, a rear pack 2, and a folding bag 3. Both the front pack 1 and the rear pack 2 are made of lightweight nylon fabric, which is both wear-resistant and waterproof. The folding bag 3 adopts an accordion structure design, which can achieve smooth telescopic folding. The front pack 1, the rear pack 2, and the folding bag 3 constitute the pack assembly. The pack assembly has a cavity for storing items inside. The upper end of the pack assembly has an opening, and the opening has a zipper 23 for opening and closing. The zipper 23 adopts a metal tooth structure and is equipped with a waterproof coated zipper pull, which can open and close smoothly and improve the sealing of the opening.

[0025] The top of the bag assembly is fixedly connected to a handle 4, which is made of high-tenacity foam, providing a soft grip and strong load-bearing capacity. The front of the bag body 1 is symmetrically connected to double shoulder straps 5, which are made of a composite material of breathable mesh and nylon fabric, and filled with elastic sponge to distribute the carrying pressure. The front of the bag body 1 is fixedly connected to a shock-absorbing pad 18, which is made of slow-rebound memory foam to effectively buffer the vibration and impact during walking. The front of the bag body 1 is fixedly installed to a lumbar support pad 17, which adopts an arc-shaped fit design. The outer layer is made of breathable and wear-resistant fabric, and the inner layer is filled with flexible silicone, which can closely fit the waist curve and improve carrying stability and comfort.

[0026] The package also includes an expansion mechanism that works in conjunction with the package body assembly to achieve multi-level adjustment of the package volume. The expansion mechanism is symmetrically fixedly connected to two slider support rods 6 on the side wall of the front package body 1. The slider support rods 6 are made of high-strength aluminum alloy, which is both lightweight and has high load-bearing capacity. Two folding adjustment rods 20 are symmetrically fixedly connected to the side wall of the rear package body 2. The folding adjustment rods 20 are made of the same material and have the same specifications as the slider support rods 6. The two folding adjustment rods 20 have three through guide grooves 21 longitudinally opened inside. The inner wall of the guide groove is polished and sprayed with a wear-resistant coating to greatly reduce sliding friction resistance and avoid wear caused by long-term sliding. Three locking rods 7 are fixedly connected to each of the two slider support rods 6. The locking rods 7 are made of high-hardness carbon steel, which is not easy to deform and wear-resistant. Each locking rod 7 passes through the corresponding through guide groove 21 and forms a sliding connection structure with clearance fit to ensure smooth sliding and prevent shaking.

[0027] Each locking lever 7 has three equally spaced expansion slots 8. The inner wall of the expansion slot 8 has a fine anti-slip texture to increase the contact friction with the locking pins and improve the stability after locking. Each folding adjustment lever 20 has an unlocking lever 19 on the side away from the bag body assembly. The unlocking lever 19 is made of lightweight engineering plastic, balancing structural strength and lightweight requirements. Each unlocking lever 19 is fixedly connected to three elastic locking pins 9 by snap-fit ​​on the side near the corresponding folding adjustment lever 20. The elastic locking pins 9 are made of steel to effectively ensure the structural strength and wear resistance of the locking pins. Each unlocking lever 19 is elastically connected to the corresponding folding adjustment lever 20 by multiple stainless steel locking pin return springs 10. The locking pin return spring 10 adopts a close-coil design, with uniform and stable elastic force, ensuring that the elastic locking pin 9 always has a reliable locking force. Each elastic locking pin 9 extends into the corresponding through guide groove 21, and is precisely matched with the expansion position slot 8 of the locking rod 7 to achieve locking positioning at different expansion positions. The outer sides of the two folding adjustment rods 20 are rotatably connected to the rotating rod 11 through deep groove ball bearings. The bearings make the rotation smoother and reduce wear. The surface of the rotating rod 11 is provided with anti-slip ridges for easy gripping and force application. The other end of the two rotating rods 11 is fixedly connected to the eccentric block 22 through a key connection. The eccentric block 22 is made of alloy steel, with a compact structure and moderate inertia, and can accurately resist the unlocking rod 19 when rotating.

[0028] This includes a strap adjustment mechanism, which improves the stability of the backpack after loading items and prevents items from swaying. The strap adjustment mechanism includes T-slots 12 located on the front of the two slider support rods 6. The inner wall of the T-slots 12 is equipped with an anti-slip structure to increase sliding resistance and prevent the T-blocks from sliding easily. T-blocks 13 are slidably connected to the two T-slots 12 respectively. The T-blocks 13 adopt a composite structure of engineering plastic and metal inserts, which combines smooth sliding and structural strength. The T-blocks 13 and the T-slots 12 form an anti-detachment limiting fit. It can effectively prevent the sliding process from derailing. The front sides of the two T-blocks 13 are fixedly connected with multi-functional straps 14. The multi-functional straps 14 are made of high-strength nylon webbing, which has high tensile strength and wear resistance. The other end of one of the multi-functional straps 14 is fixedly connected with a male buckle 15, and the other end of the other multi-functional strap 14 is fixedly connected with a female buckle 16. Both the male buckle 15 and the female buckle 16 are made of zinc alloy with electroplating treatment, which is corrosion resistant and tightly fastened. The two together form a quick-fastening structure, which makes it easy to quickly fix or loosen the straps.

[0029] The working principle of this utility model is as follows: In the initial state, the locking pin return spring 10 is in the normal state, which drives the elastic locking pin 9 to engage with the initial expansion position slot 8 of the locking rod 7, and the package assembly is in the initial volume; the T-block 13 maintains the initial position under the action of the anti-slip structure of the T-slot 12, and the strap 14 is not fixed; the eccentric block 22 faces outward and is separated from the unlocking rod 19.

[0030] When the volume needs to be expanded, grasp one side of the unlocking lever 19 and pull it out. This will move the elastic locking pin 9 and stretch the locking pin return spring 10. Rotate the rotating rod 11 inward so that the eccentric block 22 abuts against the unlocking lever 19 to keep it unlocked. Repeat the same operation on the other side to disengage both elastic locking pins 9 from the expansion position slot 8. After unlocking, pull the front bag body 1 outward to move the slider support rod 6 and locking rod 7 along the guide groove 21 of the folding adjustment rod 20, and the accordion-style folding bag 3 will unfold and expand. After moving to the target position, turn the eccentric blocks 22 on both sides to open them. The locking pin return spring 10 will pull the unlocking lever 19 back to its original position, and the elastic locking pin 9 will engage and lock with the corresponding expansion position slot 8, completing the expansion.

[0031] When the user needs to carry the backpack, the T-blocks 13 inside the T-slots 12 on both sides can be pushed down to the waist to fasten the male buckle 15 and the female buckle 16, improving stability. When the user needs to fix the backpack to the suitcase for movement, the user can move the two T-blocks 13 up, thereby moving the straps up. At this time, the straps are raised to the top of the backpack and connected to the suitcase handle. Since the backpack material is relatively soft and prone to slipping and tipping, fixing the straps to the top of the backpack can make the center of gravity of the backpack closer to the center of gravity of the suitcase handle, which can effectively limit the backpack's swaying and deviation, prevent slipping, and make the fixation more reliable. Then, the male buckle 15 and the female buckle 16 are used to bypass the suitcase handle and fasten the fixation. When it is necessary to release the fixation, the male buckle 15 and the female buckle 16 can be separated.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A lightweight backpack that is easy to fold, characterized in that, include: The front bag (1), the rear bag (2) and the folding bag (3) constitute a bag assembly, and the bag assembly has a cavity inside for accommodating items. The expansion mechanism, in conjunction with the package assembly, enables multi-level adjustment of the package volume. The expansion mechanism includes two slider support rods (6) symmetrically fixedly connected to the side wall of the front package (1), and two folding adjustment rods (20) symmetrically fixedly connected to the side wall of the rear package (2). The two folding adjustment rods (20) have three longitudinally extending guide slots (21) (upper, middle, and lower) inside. Each of the two slider support rods (6) is fixedly connected to three locking rods (7), each locking rod (7) passing through a corresponding guide slot (21). And slide connection; each of the locking rods (7) is provided with three expansion slots (8) at equal intervals, each of the folding adjustment rods (20) is provided with an unlocking rod (19) on the side away from the package assembly, each of the unlocking rods (19) is fixedly connected with three elastic pins (9) on the side close to the corresponding folding adjustment rod (20), each of the unlocking rods (19) is elastically connected to the corresponding folding adjustment rod (20) through multiple pin return springs (10), and each of the elastic pins (9) extends into the corresponding through guide groove (21); Strap adjustment mechanism; the strap adjustment mechanism can improve the stability of the backpack.

2. The lightweight backpack that is easy to fold according to claim 1, characterized in that, The upper end of the package assembly is provided with an opening, and a zipper (23) is provided at the opening for opening and closing.

3. A lightweight backpack that is easy to fold according to claim 1, characterized in that, A handle (4) is fixedly connected to the top of the bag assembly, and double shoulder straps (5) are symmetrically connected to the front side of the front bag body (1).

4. A lightweight backpack that is easy to fold according to claim 1, characterized in that, A shock-absorbing pad (18) is fixedly connected to the front side of the front body (1), and a lumbar support pad (17) is fixedly installed on the front side of the front body (1).

5. A lightweight backpack that is easy to fold according to claim 1, characterized in that, The outer sides of the two folding adjustment rods (20) are rotatably connected to rotating rods (11), and the other ends of the two rotating rods (11) are fixedly connected to eccentric blocks (22).

6. A lightweight backpack that is easy to fold according to claim 1, characterized in that, The strap adjustment mechanism includes two T-slots (12) respectively opened on the front side of the corresponding slider support rod (6). A T-block (13) is slidably connected in each T-slot (12). A multi-functional strap (14) is fixedly connected to the front side of each T-block (13). A female buckle (15) is fixedly connected to the other end of one of the multi-functional straps (14), and a female buckle (16) is fixedly connected to the other end of the other multi-functional strap (14).

Images